EP2233215A1 - Device for regulating the width of a film surface on a paper web - Google Patents

Device for regulating the width of a film surface on a paper web Download PDF

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Publication number
EP2233215A1
EP2233215A1 EP10157065A EP10157065A EP2233215A1 EP 2233215 A1 EP2233215 A1 EP 2233215A1 EP 10157065 A EP10157065 A EP 10157065A EP 10157065 A EP10157065 A EP 10157065A EP 2233215 A1 EP2233215 A1 EP 2233215A1
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EP
European Patent Office
Prior art keywords
drum
film
transfer drum
movable
width
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10157065A
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German (de)
French (fr)
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EP2233215B1 (en
Inventor
Dominique RATEL
Francis Boffano
Stéphane RIFFARD
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Allimand
Original Assignee
Allimand
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Publication date
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Priority to PL10157065T priority Critical patent/PL2233215T3/en
Priority to SI201030812T priority patent/SI2233215T1/en
Publication of EP2233215A1 publication Critical patent/EP2233215A1/en
Application granted granted Critical
Publication of EP2233215B1 publication Critical patent/EP2233215B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/041—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for positioning, loading, or deforming the blades
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/64—Addition to the formed paper by contacting paper with a device carrying the material the material being non-fluent at the moment of transfer, e.g. in form of preformed, at least partially hardened coating

Definitions

  • the present invention relates to the field of stationery and more particularly to machines for manufacturing and forming paper.
  • One of the commonly used techniques for thus applying surface products is to transfer a film of product on a sheet of paper between two rolls in contact and in rotation, between which passes the paper support to be coated.
  • a dedicated system deposits a calibrated film thickness on the surface of each of the rolls, which film is then applied to both sides of the sheet of paper as it passes between the rolls.
  • the rollers thus perform a film transfer on the sheet of paper.
  • Scraping devices have been proposed to allow collection of excess liquid film deposited on the coating rollers and thus precisely defining the width of the film to be applied. These scraping devices are only manually adjustable only by the operators. So, if the The size of the sheet to be coated changes, the position of the scraping devices must be manually adjusted to adapt the width of the film to be deposited to that of the sheets to be coated. This disturbs the production during the adjustment phases and therefore generates additional costs. Furthermore, the manual settings of the scraping devices favor the misalignment of the scrapers and therefore do not guarantee the perfect quality of the sheets of paper produced.
  • the invention aims in particular to provide a setting device that allows an adaptation of the width of the film to be deposited without stopping the paper production line or manual intervention of the operators.
  • the present invention provides a device for adjusting the width of deposition of a surface film on a paper web, this device being intended to cooperate with at least one drum for transferring said film onto a paper web.
  • the device of the invention comprises at least one fixed scraper member adapted to rub against said transfer drum of said surface film and adapted to delimit the maximum width of the film to be deposited.
  • This device is characterized in that it comprises at least one movable scraper member in at least a first direction substantially normal to the surface of the transfer drum, and in at least a second direction substantially parallel to a generator of said transfer drum said mobile scraping member (s) cooperating with an automated moving mechanism, so as to adjust the width L of the surface film on the transfer drum between a minimum value Lmin and a maximum value Lmax determined by the fixed scraper member.
  • the device for adjusting the width of deposition of a film on a paper web advantageously allows an automatic adjustment of the width by the implementation of a set of stationary scrapers and mobile scrapers actuated by a mechanism automated.
  • the device of the invention makes it possible to eliminate the stops of production and the errors due the manual adjustments of operators in case of multiple changes in the width of the sheets of paper manufactured.
  • the automated movement mechanism comprises a translation transport of the mobile scraping member (s) in a direction substantially parallel to a generatrix of the transfer drum and tilting means (s) said (s) mobile scraping member (s), on the transfer drum.
  • the translation transport comprises a carriage for supporting the mobile scraping members and motor means for moving said carriage in translation in a direction parallel to a generatrix of the transfer drum given by guide means.
  • the transport is screw-nut type and the support carriage is mounted integral with a nut cooperating with a threaded shaft actuated in rotation by a motor.
  • Such a type of transport proves to be simple, precise and reliable to use, and at the same time inexpensive to manufacture.
  • the tilting means of the scraping members movable on the transfer drum comprise at least one tilting jack, said jack allowing the application or withdrawal of said scraper member on the transfer drum.
  • the movable scraper member and the fixed scraper member are vertically offset relative to one another and the automated movement mechanism allows at least partial superimposition of the scoring member. mobile scraping with the fixed scraper. Thanks to such a configuration, we obtain a great modularity of adjustment of the width of deposition of a surface film, and a multiplicity of possible adjustments of the value of this width to adapt it to all kinds of formats of paper strips .
  • the device of the invention comprises at least two scraping members individually movable tilting and offset vertically relative to each other, said movable scraping members being integral with the automated movement mechanism.
  • the movable scraper members are pivotally mounted on the movement carriage and each cooperate with a tilt cylinder. This gives the device of the invention great flexibility of adjustment and use.
  • the fixed and mobile scraping members each comprise a doctor blade friction against the drum and a scraped surface recovery bucket on the drum, said recovery bucket being disposed under the plate of friction, so as to recover said surface film flowing by gravity under said doctor blade, after scraping.
  • Another object of the present invention also relates to the procuration of a system for applying a surface film to a paper web.
  • This system comprises at least two drums, at least one of which comprises liquid surface film application members on its surface for transferring it to a said strip of paper circulated between said drums, as well as a rotational drive device. in the opposite direction of said drums.
  • the system of the invention is characterized in that it comprises for each drum provided with application members, at least two devices for adjusting the width of the surface film to be applied, each conforming to the device of the present invention as as described above, said devices for adjusting the width of the surface film to be applied being positioned in pairs symmetrically to each other relative to the drum and adapted to the fixed scraper member tangentially supports on the surface of said drum at each end thereof.
  • the figure 1 represents a system or machine S for applying a surface film to a paper web according to the present invention.
  • a machine S is commonly used in the paper industry on industrial lines of paper rolls and is traditionally referred to as "sizer".
  • the machine S of the invention comprises a frame B comprising an application device R of a liquid surface film to be deposited on the paper strips manufactured and supporting two devices 1 for adjusting the width of the deposition of the liquid film according to the format of the manufactured paper strips. These two adjustment devices 1 are designed to cooperate with a cylindrical transfer drum 2 supported along its axis in rotation on the frame of the machine S between which are circulated the strips of paper manufactured to coat the two faces thereof. a surface film.
  • Each adjusting device 1 is installed on the bed B of the machine so as to come into contact with the surface of the drum 2 at the ends 2a, 2b of these, in a position symmetrical to each other with respect to a median transverse plane P of the drum 2.
  • the machine S comprises at least a second, identical to the first drum 2, and also supported along its axis in rotation on the frame of the machine S.
  • the two drums 2 are both rotated in the opposite direction by a device d adapted training and customary in this type of machine, so as to allow the circulation of a paper web between said drums 2 and the deposit in contact with the surface of these drums with a surface film layer previously deposited by the application device R contained in the frame B of the machine S on the surface of the drums 2.
  • the machine S also comprises two other adjustment devices 1 of the width L of the surface film co-operating with the second non-illustrated transfer drum and also arranged on the frame of the machine symmetrically. one of the other relative to the transverse plane P median of the second drum, the median plane P being common to the two drums 2.
  • the machine S thus preferably comprises at least two transfer drums 2 and two adjusting devices 1 of the width of deposition of a surface film cooperating with the ends of each of the two drums 2.
  • Each adjustment device 1 comprises in the preferred embodiment represented in particular on the figures 2 and 3 At least a first fixed scraper member 3 adapted to tangentially rub against the surface of transfer drum 2.
  • the fixed scraper 3 is mounted at a first end 41 of a first arm 4 fixed by its second end 42 of the outer side blank 1e of the device 1 or, alternatively, on the frame B of the machine S.
  • the first end 41 comprises a plate 43 vertical and perpendicular to the axis of the arm 4, and on which the fixed scraper member 3 is pivotally fixed about an axis 5 taken on a bearing 6 secured to the front face of the plate 43, that is to say the face facing the drum 2 .
  • a hydraulic or pneumatic jack 7 is pivotally mounted substantially in the middle on a stirrup 8 secured to the rear face of the drum. platen 43, the rod 71 of said cylinder 7 being integrally connected in rotation to the axis 5 of pivoting of the fixed scraper member 3 via a triangular fin 9, pivoting at the end of rod 71 of cylinder.
  • This jack 7 is conventionally electro-controlled.
  • a displacement of the rod 71 of the jack necessarily causes a pivoting / tilting of the fixed scraper member 3 about its axis 5 on the plate 43, and therefore a disengagement movement or approximation in a substantially normal direction relative to on the surface of the drum 2.
  • each adjustment device 1 of the width L of a surface film also comprises two second scraper members 11, 12, both movable in at least a first direction substantially normal to the surface of the drum. 2, and in at least one direction substantially parallel to a generatrix of said transfer drum 2 so as to adjust the width L of the surface film on the transfer drum 2 between a minimum value Lmin and a maximum value Lmax determined by the fixed scraper member 3 as described below.
  • the movable scraping members 11, 12 cooperate with an automated movement mechanism 13 to allow their displacement along their two mobility directions mentioned above. They also have preferably a structure identical to that of the fixed scraper member 3.
  • a squeegee 8 comprises a support heel 81, preferably metal, aluminum or steel for example, integral with a pivot axis 5 of the scraper members 3, 11, 12 on which is fixed a rotating plate 821 adjustable in rotation around the shaft 822, said plate supporting a removable blade 823 clamped between the plate 821 and a metal plate 82 by knurled screws 824, the blade 823 being made of a non-marking material on the surface of the drum 2 of the machine S, and for example a rubber in the example shown or a rigid plastic.
  • the scraping members 3, 11, 12 finally comprise a recovery bucket 9 located under the flap 82 so as to recover during operation of the machine the liquid surface film scraped on the surface of the drum 2.
  • a discharge pipe 10 located at the bottom of each bucket 9 allows a return of the liquid film recovered in the bucket to be applied by the liquid film application device R located in the frame B of the machine S.
  • the movable scraping members 11, 12 and the fixed scraper member 3 are offset vertically relative to each other.
  • the movable scraping member 11 is raised relative to the fixed scraper member 3 and the other movable scraping member 12 as is apparent from the figure 4 , the scraping members 3 and 12 being located at the same height.
  • the automated displacement mechanism 13 makes it possible, if necessary during its displacement in horizontal translation to adjust the width L of deposition of a surface film, to at least partially superpose the mobile doctoring member 11 with the fixed scraping 3.
  • the automated movement mechanism 13 comprises a support arm 14 comprising a plate 141 integral with a shaft 142.
  • the plate 141 is substantially vertical pivotally supports the two movable scraping members 11, 12.
  • the plate 141 is fixed, by any appropriate means such as welding or bolting, on a first end of a shaft 142, said plate 141 being perpendicular to the longitudinal axis of said shaft 142.
  • the second end of the shaft 142 is secured to a transport 15 housed in a housing 16 of protection, which is also housed a motor 17, for example a conventional asynchronous motor, which cooperates with the transport 15 to move the arm 14 along a substantially horizontal axis and parallel to a generatrix of the transfer drum 2 and perpendicular to the longitudinal axis of the shaft 142 of the arm 14.
  • a motor 17 for example a conventional asynchronous motor
  • the transport 15 is preferably according to the present invention a screw-nut type mechanism.
  • this transport is composed in the embodiment shown of a parallelepipedic cross member 18 fixed on the frame B of the machine S and on a rear face of which is screwed the protective casing 16.
  • the cross member 18 is open on its periphery by an upper angle window 19 in which is housed a carriage 20 for fixing the support arm 14.
  • the carriage 20 comprises a substantially parallelepipedal body 201 carrying at one end, outside the crosspiece 18, a plate 202 of section substantially trapezoidal on which is fixed the second end of the shaft 142 of the arm 14, and secured to the opposite end of the plate 202 at the base of the body 201 inside the crosspiece 18 of a nut 21 mounted on a coaxial threaded shaft 22 secured in the illustrated example of the drive shaft of the motor 17.
  • the threaded shaft 22 is itself rotated and causes a die placing by helical engagement of the nut 21 along said axis 22 and thus a horizontal displacement of the carriage 20 and the support arm 14 along the threaded axis, substantially parallel to a generatrix of the transfer drum 2.
  • the carriage 20 is also guided in its horizontal translation movement through the window 19 of the crossmember 18 by means of two rails 24, 25 carried on the two walls of the crossmember 18 defining the window 19, on each of which slides a rail follower 26, 27 fixed on an edge of the plate 202 of the carriage.
  • the guidance in horizontal translation of the carriage 20 and thus of the arm 14 carrying the movable scraper members 11, 12 is thus ensured both by the screw-nut system formed of the nut 21 and the shaft 22 on which is mounted the carriage 20 and both by the guiding assembly comprising the rails 24, 25 and rail followers 26, 27, together guiding which ensures stability in horizontal translation of the arm 14 and thus movable scraping members 11, 12.
  • said movable scraping members 11, 12 are also movable in a direction substantially normal to the surface of the drum 2 of the machine S. This normal movement on the surface of the drum 2 allows a selective application of each of the movable members 11 , 12 on the surface of the drum 2 depending on the width of the desired surface film on the drum for application to the manufactured paper sheets.
  • the automated movement mechanism 13 of the adjusting device 1 of the invention comprises a tilting tool 28 of each scraper member 11, 12 fixed in rotation on the plate 141 of the arm 14.
  • This tilting tool 28 is advantageously constituted, in the context of the invention, preferably by a hydraulic or pneumatic jack 29 mounted to pivot substantially in the middle on a stirrup 30 secured to the rear face of the plate 141, the scraping members 11, 12 being mounted on the front face of said plate 141.
  • the cylinders 29 are connected to the end of their rod 291 to the pivot axis of the scraper members 11, 12 via a triangular fin 31, pivoting to the level of the end of the cylinder rod and secured to the pivot axis of the scraper members 11, 12.
  • the cylinders 29 are also conventionally electrically controlled.
  • a displacement of the rod 291 of the cylinders 29 necessarily causes a pivoting / tilting of the scraper members 11, 12 around their axis of attachment to the plate 141, and therefore a release movement or approximation in a substantially normal direction by relative to the surface of the drum 2.
  • each device On the front face of the plate 141 of each device are finally installed water spray nozzles 32. These spray nozzles are used to moisten the surface of the drum 2 when the scraper member 11 is in recovery with the body of 3. In effect, in overlap, the scraper member 3 removes the entire surface film and the contact of the scraper member 11 can not be dry without damaging the coating of the drum 2 and the blade 823.
  • the two fixed scraper means 3 define as shown on the figure 2 , the maximum width Lmax of coating machine S, and more precisely of its transfer drums 2.
  • the width L1 of the scraping members 3 of the two devices 1 is defined so that the format of the sheets of paper to be treated by the machine S, and more exactly the width of the treated paper sheets, is always less than the maximum width Lmax.
  • the fixed scraper member 3 of each device is held in application against the surface of the transfer drum 2 and scrapes the surface film at the edges 2a, 2b of the drum 2, the film of surface having been previously deposited on the surface of the drum through the application device R of the machine S.
  • the movable scrapers 11, 12 each have a width L2 , preferably 125 mm in the preferred embodiment shown, which means that they can scrape an additional width of 250 mm in addition to 120 mm scraped by the fixed scraper member 3 from the edges 2a, 2b of the drum 2.
  • L2 preferably 125 mm in the preferred embodiment shown
  • this amplitude can be increased without limit by the addition of as many additional mobile scrapers as necessary.
  • Each of the fixed and mobile scraping members of each device 1 is liftable independently of the others by means of the electrically controlled cylinders 7, 29 and the arm 14 supporting the movable members 11, 12 has a 125 mm horizontal displacement in translation movement provided by the transport 15 of the motorized movement assembly 13.
  • the maximum format of the sheets of paper that can be processed with the machine S has the maximum width Lmax determined by the fixed scraping members 3 of the adjusting devices 1.
  • the movable scraping members 11, 12 of said adjustment devices then allow to vary the width of coating L according to the paper sheet sizes of width less than Lmax.
  • the paper machine When the paper machine is equipped with a sheet size measurement for generating a position command on each of the edges of the paper support, it is possible to automatically control the positioning of each of the devices 1 for adjusting the width of the paper. coating from the given instruction.

Abstract

The device comprises a fixed scraping member (3) to rub against a transfer drum (2) of the surface film and to define the maximum (Lmax) width of the film to be deposited, and a movable scraping body (11, 12) to move along a first direction normal to the surface of the transfer drum and to a direction parallel to a generator for transferring the drum. The device is intended to connect with the drum for transferring the film on the paper strip. The movable scraping member connects with an automated shifting mechanism (13) to adjust the width (L) of the surface film on the transfer drum. The device comprises a fixed scraping member (3) to rub against a transfer drum (2) of the surface film and to define the maximum (Lmax) width of the film to be deposited, and a movable scraping body (11, 12) to move along a first direction normal to the surface of the transfer drum and to a direction parallel to a generator for transferring the drum. The device is intended to connect with the drum for transferring the film on the paper strip. The movable scraping member connects with an automated shifting mechanism (13) to adjust the width (L) of the surface film on the transfer drum between a minimum value (Lmin) and maximum value(Lmax) determined by the fixed scraping body. The automated shifting mechanism comprises a carriage (15) for rotating movable scraping member in a direction parallel to a generator of the transfer drum and a unit for tilting the movable scraping body on the transfer drum. The rotating carriage comprises a cart for supporting movable scraping member and a motor for shifting the cart rotating along a direction parallel to a generator of the transfer drum provided using a guiding unit. The carriage is made of screw-nut and the support cart is fixed by a nut connecting with a threaded axis rotated by the motor. The tilting unit comprises a cylinder. The movable scraping member and the fixed scraping member are vertically spaced with respect to each other. The automated shifting mechanism allows a partial superposition of the movable scraping member with fixed scraping member. The fixed and movable scraping members each comprises a friction doctor blade on the drum, and a cup for recovering of scraped surface film on the drum. The cup for recovery is laid under the friction blade for recovering the surface film flowing under gravity under the plate after scraping of the surface of the transferring drum. An independent claim is included for a system for application of a surface film on a paper strip.

Description

La présente invention concerne le domaine de la papeterie et plus particulièrement des machines de fabrication et mise en forme de papier.The present invention relates to the field of stationery and more particularly to machines for manufacturing and forming paper.

Dans ce domaine technique, il est courant d'appliquer des produits de surface sur les bases de papier obtenues à partir de pulpe de cellulose ou de papiers recyclés afin d'obtenir un produit final présentant des caractéristiques particulières telles qu'une imprimabilité améliorée, un état de surface ou un aspect visuel adapté à la destination finale du produit.In this technical field, it is common to apply surface products to the paper bases obtained from cellulose pulp or recycled paper in order to obtain a final product having particular characteristics such as improved printability, surface condition or a visual appearance appropriate to the final destination of the product.

Une des techniques couramment employées pour appliquer ainsi des produits de surface consiste à transférer un film de produit sur une feuille de papier entre deux rouleaux en contact et en rotation, entre lesquels passe le support papier à enduire. Un système dédié dépose une épaisseur de film calibrée sur la surface de chacun des rouleaux, film qui est ensuite appliqué sur les deux faces de la feuille de papier lors de la circulation de celle-ci entre les rouleaux. Les rouleaux opèrent ainsi un transfert de film sur la feuille de papier.One of the commonly used techniques for thus applying surface products is to transfer a film of product on a sheet of paper between two rolls in contact and in rotation, between which passes the paper support to be coated. A dedicated system deposits a calibrated film thickness on the surface of each of the rolls, which film is then applied to both sides of the sheet of paper as it passes between the rolls. The rollers thus perform a film transfer on the sheet of paper.

Un des problèmes majeurs rencontré avec cette technique d'application d'un film de surface sur le papier réside dans le fait que la plupart des systèmes de dépôt de film ne permettent pas de modifier de façon simple et rapide la largeur du film déposé sur les rouleaux, appelée laize du film déposé. Cette laize est donc réglée à une valeur supérieure à la largeur du support papier à enduire ce dont il résulte un excès de film sur les bords hors format des feuilles de papier à enduire.One of the major problems encountered with this technique of applying a surface film on paper lies in the fact that most of the film deposition systems do not make it possible to modify in a simple and fast way the width of the film deposited on the films. rolls, called the width of the deposited film. This width is thus set to a value greater than the width of the paper support to be coated, which results in an excess of film on the out-of-shape edges of the sheets of paper to be coated.

Or il est nécessaire d'empêcher que cet excès de film ne s'accumule dans la zone de contact entre les deux rouleaux car sans feuille de papier pour l'absorber en continu, le film liquide vient à être projeté sous forme de gouttes qui viennent entacher les bords des feuilles de papier enduites. Il en résulte des pertes de production par manque de qualité des feuilles sur leurs bordures.Now it is necessary to prevent this excess film from accumulating in the contact zone between the two rollers because without a sheet of paper to absorb it continuously, the liquid film comes to be projected in the form of drops that come stain the edges of the coated paper sheets. This results in production losses due to the lack of quality of the leaves on their borders.

Des dispositifs de raclage ont été proposés pour permettre une collecte de l'excès de film liquide déposé sur les rouleaux d'enduction et délimitant ainsi précisément la laize du film à appliquer. Ces dispositifs de raclage ne sont que réglables manuellement uniquement par les opérateurs. Ainsi, si le format de feuille à enduire change, il faut régler manuellement la position des dispositifs de raclage pour adapter la laize du film à déposer à celle des feuilles à enduire. Ceci perturbe la production durant les phases de réglage et engendre donc des surcoûts. Par ailleurs, les réglages manuels des dispositifs de raclage favorisent les erreurs de positionnement des racles et donc ne permettent pas de garantir une parfaite qualité des feuilles de papier produites.Scraping devices have been proposed to allow collection of excess liquid film deposited on the coating rollers and thus precisely defining the width of the film to be applied. These scraping devices are only manually adjustable only by the operators. So, if the The size of the sheet to be coated changes, the position of the scraping devices must be manually adjusted to adapt the width of the film to be deposited to that of the sheets to be coated. This disturbs the production during the adjustment phases and therefore generates additional costs. Furthermore, the manual settings of the scraping devices favor the misalignment of the scrapers and therefore do not guarantee the perfect quality of the sheets of paper produced.

La présente invention a pour objectif de procurer une solution efficace de réglage de la laize d'un film d'enduction de feuilles de papier sur les machines à papier. L'invention vise notamment à procurer un dispositif de réglage qui permette une adaptation de la laize du film à déposer sans arrêt de la ligne de production du papier ni intervention manuelle des opérateurs.It is an object of the present invention to provide an effective solution for adjusting the width of a coating film of paper sheets on paper machines. The invention aims in particular to provide a setting device that allows an adaptation of the width of the film to be deposited without stopping the paper production line or manual intervention of the operators.

A cet effet, la présente invention propose un dispositif de réglage de la laize de dépôt d'un film de surface sur une bande de papier, ce dispositif étant destiné à coopérer avec au moins un tambour de transfert dudit film sur une bande de papier. Le dispositif de l'invention comporte au moins un organe de raclage fixe apte à frotter contre ledit tambour de transfert dudit film de surface et adapté pour délimiter la laize maximale du film à déposer. Ce dispositif se caractérise par le fait qu'il comporte au moins un organe de raclage mobile selon au moins une première direction sensiblement normale à la surface du tambour de transfert, et selon au moins une seconde direction sensiblement parallèle à une génératrice dudit tambour de transfert, le(s) dit(s) organe(s) de raclage mobile(s) coopérant avec un mécanisme de déplacement automatisé, de manière à régler la laize L du film de surface sur le tambour de transfert entre une valeur minimale Lmin et une valeur maximale Lmax déterminée par l'organe de raclage fixe.For this purpose, the present invention provides a device for adjusting the width of deposition of a surface film on a paper web, this device being intended to cooperate with at least one drum for transferring said film onto a paper web. The device of the invention comprises at least one fixed scraper member adapted to rub against said transfer drum of said surface film and adapted to delimit the maximum width of the film to be deposited. This device is characterized in that it comprises at least one movable scraper member in at least a first direction substantially normal to the surface of the transfer drum, and in at least a second direction substantially parallel to a generator of said transfer drum said mobile scraping member (s) cooperating with an automated moving mechanism, so as to adjust the width L of the surface film on the transfer drum between a minimum value Lmin and a maximum value Lmax determined by the fixed scraper member.

Le dispositif de réglage de la laize de dépôt d'un film sur une bande de papier selon l'invention permet avantageusement un réglage automatique de la laize par la mise en oeuvre d'un ensemble de racles fixes et de racles mobiles actionnées par un mécanisme automatisé. Ainsi, le dispositif de l'invention permet de supprimer les arrêts de production et les erreurs dues aux interventions manuelles de réglage des opérateurs en cas de multiples modifications de la laize des feuilles de papier fabriquées.The device for adjusting the width of deposition of a film on a paper web according to the invention advantageously allows an automatic adjustment of the width by the implementation of a set of stationary scrapers and mobile scrapers actuated by a mechanism automated. Thus, the device of the invention makes it possible to eliminate the stops of production and the errors due the manual adjustments of operators in case of multiple changes in the width of the sheets of paper manufactured.

Conformément à une caractéristique préférée du dispositif de l'invention, le mécanisme de déplacement automatisé comporte un transport de translation du (des) organe(s) de raclage mobile(s) selon une direction sensiblement parallèle à une génératrice du tambour de transfert et des moyens de basculement du (des) dit(s) organe(s) de raclage mobile(s), sur le tambour de transfert.According to a preferred characteristic of the device of the invention, the automated movement mechanism comprises a translation transport of the mobile scraping member (s) in a direction substantially parallel to a generatrix of the transfer drum and tilting means (s) said (s) mobile scraping member (s), on the transfer drum.

Toujours selon l'invention, le transport de translation comporte un chariot de support des organes de raclage mobile et des moyens moteurs de déplacement dudit chariot en translation selon une direction parallèle à une génératrice du tambour de transfert donnée par des moyens de guidage.Still according to the invention, the translation transport comprises a carriage for supporting the mobile scraping members and motor means for moving said carriage in translation in a direction parallel to a generatrix of the transfer drum given by guide means.

De façon avantageuse, dans le dispositif de l'invention le transport est de type vis-écrou et le chariot de support est monté solidaire d'un écrou coopérant avec un axe fileté actionné en rotation par un moteur. Un tel type de transport s'avère à la fois simple, précis et fiable d'utilisation, et dans le même temps peu coûteux de réalisation.Advantageously, in the device of the invention the transport is screw-nut type and the support carriage is mounted integral with a nut cooperating with a threaded shaft actuated in rotation by a motor. Such a type of transport proves to be simple, precise and reliable to use, and at the same time inexpensive to manufacture.

De façon avantageuse encore, les moyens de basculement des organes de raclage mobiles sur le tambour de transfert comportent au moins un vérin de basculement, ledit vérin permettant l'application ou retrait dudit organe de raclage sur le tambour de transfert.Advantageously, the tilting means of the scraping members movable on the transfer drum comprise at least one tilting jack, said jack allowing the application or withdrawal of said scraper member on the transfer drum.

De préférence conformément à la présente invention, l'organe de raclage mobile et l'organe de raclage fixe sont décalés verticalement l'un par rapport à l'autre et le mécanisme de déplacement automatisé permet une superposition au moins partielle de l'organe de raclage mobile avec l'organe de raclage fixe. Grâce à une telle configuration, on obtient une grande modularité de réglage de la laize de dépôt d'un film de surface, et une multiplicité de réglages possibles de la valeur de cette laize pour l'adapter à toute sorte de formats de bandes de papier.Preferably in accordance with the present invention, the movable scraper member and the fixed scraper member are vertically offset relative to one another and the automated movement mechanism allows at least partial superimposition of the scoring member. mobile scraping with the fixed scraper. Thanks to such a configuration, we obtain a great modularity of adjustment of the width of deposition of a surface film, and a multiplicity of possible adjustments of the value of this width to adapt it to all kinds of formats of paper strips .

Dans un mode de réalisation préféré, le dispositif de l'invention comporte au moins deux organes de raclage mobiles individuellement en basculement et décalés verticalement l'un par rapport à l'autre, les dits organes de raclage mobiles étant solidaires du mécanisme de déplacement automatisé.In a preferred embodiment, the device of the invention comprises at least two scraping members individually movable tilting and offset vertically relative to each other, said movable scraping members being integral with the automated movement mechanism.

Dans ce mode de réalisation préféré, les organes de raclage mobiles sont montés pivotant sur le chariot de déplacement et coopèrent chacun avec un vérin de basculement. On confère ainsi une grande souplesse de réglage et d'utilisation au dispositif de l'invention.In this preferred embodiment, the movable scraper members are pivotally mounted on the movement carriage and each cooperate with a tilt cylinder. This gives the device of the invention great flexibility of adjustment and use.

Toujours selon l'invention et de façon préférée, les organes de raclage fixe et mobiles comportent chacun un racle de frottement contre le tambour et un godet de récupération du film de surface raclé sur le tambour, ledit godet de récupération étant disposé sous la plaque de frottement, de manière à récupérer ledit film de surface s'écoulant par gravité sous ladite racle, après raclage. Ce mode de réalisation permet une économie maximale de film liquide, et permet d'éviter ou à tout le moins de limiter le gaspillage du produit appliqué à la surface du tambour.Still according to the invention and preferably, the fixed and mobile scraping members each comprise a doctor blade friction against the drum and a scraped surface recovery bucket on the drum, said recovery bucket being disposed under the plate of friction, so as to recover said surface film flowing by gravity under said doctor blade, after scraping. This embodiment allows a maximum economy of liquid film, and avoids or at least limit the waste of the product applied to the surface of the drum.

Un autre objet de la présente invention concerne par ailleurs la procuration d'un système d'application d'un film de surface sur une bande de papier. Ce système comporte au moins deux tambours, dont au moins un comporte des organes d'application de film de surface liquide sur sa surface pour le transférer sur une dite bande de papier circulée entre lesdits tambours, ainsi qu'un dispositif d'entraînement en rotation en sens inverse des dits tambours. Le système de l'invention se caractérise par le fait qu'il comporte pour chaque tambour doté d'organes d'application, au moins deux dispositifs de réglage de la laize du film de surface à appliquer conformes chacun au dispositif de la présente invention tel que décrit précédemment, lesdits dispositifs de réglage de la laize du film de surface à appliquer étant positionnés deux à deux de manière symétrique l'un de l'autre relativement au tambour et de façon adaptée à ce que l'organe de raclage fixe appuie tangentiellement sur la surface dudit tambour au niveau de chaque extrémité de celui-ci.Another object of the present invention also relates to the procuration of a system for applying a surface film to a paper web. This system comprises at least two drums, at least one of which comprises liquid surface film application members on its surface for transferring it to a said strip of paper circulated between said drums, as well as a rotational drive device. in the opposite direction of said drums. The system of the invention is characterized in that it comprises for each drum provided with application members, at least two devices for adjusting the width of the surface film to be applied, each conforming to the device of the present invention as as described above, said devices for adjusting the width of the surface film to be applied being positioned in pairs symmetrically to each other relative to the drum and adapted to the fixed scraper member tangentially supports on the surface of said drum at each end thereof.

Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation de l'objet de l'invention.

  • la figure 1 représente en vue de face un système d'application d'un film de surface sur une bande de papier conforme à la présente invention, comportant deux dispositifs de réglage de la laize de dépôt dudit film de surface ;
  • la figure 2 représente une vue de dessus partielle du système de la figure 1 , ne montrant qu'un tambour de transfert et les deux dispositifs de réglage de la laize de dépôt dudit film de surface ;
  • la figure 3 représente en détail et vu de dessus un dispositif de réglage de la laize de dépôt d'un film de surface conforme à la présente invention, en l'espèce correspondant au dispositif localisé à gauche sur les figures 1 et 2 .
  • la figure 4 représente une vue en coupe du dispositif de réglage de la laize de dépôt d'un film de surface conforme à la présente invention.
Various other characteristics appear from the description given below with reference to the accompanying drawings which show, by way of non-limiting examples, embodiments of the subject of the invention.
  • the figure 1 is a front view of a system for applying a surface film on a paper web according to the present invention, comprising two devices for adjusting the deposition width of said surface film;
  • the figure 2 represents a partial top view of the system of the figure 1 , showing only a transfer drum and the two devices for adjusting the deposition width of said surface film;
  • the figure 3 shows in detail and seen from above a device for adjusting the width of deposition of a surface film according to the present invention, in this case corresponding to the device located on the left on the figures 1 and 2 .
  • the figure 4 is a sectional view of the surface layer deposition control device of a surface film according to the present invention.

La figure 1 représente un système ou machine S d'application d'un film de surface sur une bande de papier conforme à la présente invention. Une telle machine S est communément employée dans l'industrie papetière sur les lignes de production industrielle de rouleaux de papier et est traditionnellement dénommée sous le nom de "sizer". La machine S de l'invention comporte un bâti B comportant un dispositif d'application R d'un film liquide de surface à déposer sur les bandes de papier fabriquées et supportant deux dispositifs 1 de réglage de la laize de dépôt du film liquide en fonction du format des bandes de papiers fabriquées. Ces deux dispositifs de réglages 1 sont conçus pour coopérer avec un tambour de transfert 2 cylindrique supporté selon son axe en rotation sur le bâti de la machine S entre lesquels sont circulées les bandes de papier fabriquées pour enduire les deux faces de celles-ci d'un film de surface.The figure 1 represents a system or machine S for applying a surface film to a paper web according to the present invention. Such a machine S is commonly used in the paper industry on industrial lines of paper rolls and is traditionally referred to as "sizer". The machine S of the invention comprises a frame B comprising an application device R of a liquid surface film to be deposited on the paper strips manufactured and supporting two devices 1 for adjusting the width of the deposition of the liquid film according to the format of the manufactured paper strips. These two adjustment devices 1 are designed to cooperate with a cylindrical transfer drum 2 supported along its axis in rotation on the frame of the machine S between which are circulated the strips of paper manufactured to coat the two faces thereof. a surface film.

Comme représenté sur les figures 1 et 2 , chaque dispositif de réglage 1 est installé sur le bâti B de la machine de manière à pouvoir entrer en contact avec la surface des tambours 2 au niveau des extrémités 2a, 2b de ceux-ci, dans une position symétrique l'un de l'autre par rapport à un plan transversal médian P du tambour 2. As shown on figures 1 and 2 Each adjusting device 1 is installed on the bed B of the machine so as to come into contact with the surface of the drum 2 at the ends 2a, 2b of these, in a position symmetrical to each other with respect to a median transverse plane P of the drum 2.

Bien qu'un seul tambour 2 soit représenté sur les figures 1 et 2 , la machine S en comporte au moins un deuxième, identique au premier tambour 2, et également supporté selon son axe en rotation sur le bâti de la machine S. Les deux tambours 2 sont actionnés tous deux en rotation en sens inverse par un dispositif d'entrainement adapté et usuel dans ce type de machine, de manière à permettre la circulation d'une bande de papier entre lesdits tambours 2 et le dépôt au contact de la surface de ces tambours d'une couche de film de surface préalablement déposée par le dispositif d'application R contenus dans le bâti B de la machine S sur la surface des tambours 2. Although only one drum 2 is shown on the figures 1 and 2 , the machine S comprises at least a second, identical to the first drum 2, and also supported along its axis in rotation on the frame of the machine S. The two drums 2 are both rotated in the opposite direction by a device d adapted training and customary in this type of machine, so as to allow the circulation of a paper web between said drums 2 and the deposit in contact with the surface of these drums with a surface film layer previously deposited by the application device R contained in the frame B of the machine S on the surface of the drums 2.

De préférence selon l'invention, la machine S comporte également deux autres dispositifs de réglage 1 de la laize L de dépôt du film de surface coopérant avec le deuxième tambour de transfert non représenté et disposé eux aussi sur le bâti de la machine de façon symétrique l'un de l'autre par rapport au plan transversal P médian du second tambour, le plan médian P étant commun aux deux tambours 2. La machine S comporte ainsi de préférence au moins deux tambours de transfert 2 et deux dispositifs de réglage 1 de la laize de dépôt d'un film de surface coopérant avec les extrémités de chacun des deux tambours 2. Preferably according to the invention, the machine S also comprises two other adjustment devices 1 of the width L of the surface film co-operating with the second non-illustrated transfer drum and also arranged on the frame of the machine symmetrically. one of the other relative to the transverse plane P median of the second drum, the median plane P being common to the two drums 2. The machine S thus preferably comprises at least two transfer drums 2 and two adjusting devices 1 of the width of deposition of a surface film cooperating with the ends of each of the two drums 2.

Chaque dispositif de réglage 1 comporte dans le mode de réalisation préféré représenté notamment sur les figures 2 et 3 , au moins un premier organe de raclage fixe 3 apte à frotter tangentiellement contre la surface du tambour de transfert 2. L'organe de raclage fixe 3 est monté à une première extrémité 41 d'un premier bras 4 fixé par sa seconde extrémité 42 sur le flan latéral externe 1e du dispositif 1 ou, en variante, sur le bâti B de la machine S. La première extrémité 41 comporte une platine 43 verticale et perpendiculaire à l'axe du bras 4, et sur laquelle l'organe de raclage fixe 3 est fixé de façon pivotante autour d'un axe 5 pris sur un palier 6 solidaire de la face antérieure de la platine 43, c'est-à-dire la face en regard du tambour 2.Each adjustment device 1 comprises in the preferred embodiment represented in particular on the figures 2 and 3 At least a first fixed scraper member 3 adapted to tangentially rub against the surface of transfer drum 2. The fixed scraper 3 is mounted at a first end 41 of a first arm 4 fixed by its second end 42 of the outer side blank 1e of the device 1 or, alternatively, on the frame B of the machine S. The first end 41 comprises a plate 43 vertical and perpendicular to the axis of the arm 4, and on which the fixed scraper member 3 is pivotally fixed about an axis 5 taken on a bearing 6 secured to the front face of the plate 43, that is to say the face facing the drum 2 .

De plus, afin de permettre un mouvement de bascule de l'organe de raclage fixe 3 relativement à la surface du tambour 2, un vérin 7 hydraulique ou pneumatique est monté pivotant sensiblement en son milieu sur un étrier 8 solidaire de la face postérieure de la platine 43, la tige 71 dudit vérin 7 étant reliée solidairement en rotation à l'axe 5 de pivotement de l'organe de raclage fixe 3 par l'intermédiaire d'une ailette triangulaire 9, pivotante au niveau de l'extrémité de tige 71 de vérin. Ce vérin 7 est de façon classique en soit électrocommandé.In addition, in order to allow a rocking movement of the fixed scraper member 3 relative to the surface of the drum 2, a hydraulic or pneumatic jack 7 is pivotally mounted substantially in the middle on a stirrup 8 secured to the rear face of the drum. platen 43, the rod 71 of said cylinder 7 being integrally connected in rotation to the axis 5 of pivoting of the fixed scraper member 3 via a triangular fin 9, pivoting at the end of rod 71 of cylinder. This jack 7 is conventionally electro-controlled.

Ainsi, un déplacement de la tige 71 du vérin entraîne nécessairement un pivotement/basculement de l'organe de raclage fixe 3 autour de son axe 5 sur la platine 43, et donc un mouvement de dégagement ou de rapprochement selon une direction sensiblement normale par rapport à la surface du tambour 2. Thus, a displacement of the rod 71 of the jack necessarily causes a pivoting / tilting of the fixed scraper member 3 about its axis 5 on the plate 43, and therefore a disengagement movement or approximation in a substantially normal direction relative to on the surface of the drum 2.

Conformément à l'invention, chaque dispositif de réglage 1 de la laize L de dépôt d'un film de surface comporte également deux seconds organes de raclage 11, 12, mobiles tous deux selon au moins une première direction sensiblement normale à la surface du tambour de transfert 2, et selon au moins une direction sensiblement parallèle à une génératrice dudit tambour de transfert 2 de manière à régler la laize L du film de surface sur le tambour de transfert 2 entre une valeur minimale Lmin et une valeur maximale Lmax déterminée par l'organe de raclage fixe 3 comme décrit par la suite.According to the invention, each adjustment device 1 of the width L of a surface film also comprises two second scraper members 11, 12, both movable in at least a first direction substantially normal to the surface of the drum. 2, and in at least one direction substantially parallel to a generatrix of said transfer drum 2 so as to adjust the width L of the surface film on the transfer drum 2 between a minimum value Lmin and a maximum value Lmax determined by the fixed scraper member 3 as described below.

Les organes de raclage mobiles 11, 12 coopèrent avec un mécanisme de déplacement 13 automatisé pour permettre leur déplacement selon leurs deux directions de mobilité précitées. Ils présentent par ailleurs de préférence une structure identique à celle de l'organe de raclage fixe 3. The movable scraping members 11, 12 cooperate with an automated movement mechanism 13 to allow their displacement along their two mobility directions mentioned above. They also have preferably a structure identical to that of the fixed scraper member 3.

Ainsi, les organes de raclage fixe 3 et mobiles 11, 12 de chaque dispositif 1 sont composés dans l'exemple de réalisation représenté sur les figures 1 à 4 , d'une raclette 8. Cette raclette 8 comprend un talon de support 81, de préférence métallique, d'aluminium ou d'acier par exemple, solidaire d'un axe 5 de pivotement des organes de raclage 3, 11, 12 sur laquelle est fixée une platine orientable 821 réglable en rotation autour de l'axe 822, ladite platine supportant une lame amovible 823 bridée entre la platine 821 et une plaque métallique 82 par des vis moletées 824, la lame 823 étant constituée d'un matériau non marquant sur la surface du tambour 2 de la machine S, et par exemple d'un caoutchouc dans l'exemple représenté ou d'un plastique rigide.Thus, the stationary 3 and mobile scraping members 11, 12 of each device 1 are composed in the embodiment shown in FIGS. Figures 1 to 4 , a squeegee 8. This squeegee 8 comprises a support heel 81, preferably metal, aluminum or steel for example, integral with a pivot axis 5 of the scraper members 3, 11, 12 on which is fixed a rotating plate 821 adjustable in rotation around the shaft 822, said plate supporting a removable blade 823 clamped between the plate 821 and a metal plate 82 by knurled screws 824, the blade 823 being made of a non-marking material on the surface of the drum 2 of the machine S, and for example a rubber in the example shown or a rigid plastic.

Les organes de raclage 3, 11, 12 comportent enfin un godet 9 de récupération situé sous la bavette 82 de manière à récupérer lors du fonctionnement de la machine le film de surface liquide raclé sur la surface du tambour 2. Un conduit d'évacuation 10 situé au fond de chaque godet 9 permet un retour du film liquide récupéré dans le godet afin d'être appliqué par le dispositif d'application R de film liquide situé dans le bâti B de la machine S. The scraping members 3, 11, 12 finally comprise a recovery bucket 9 located under the flap 82 so as to recover during operation of the machine the liquid surface film scraped on the surface of the drum 2. A discharge pipe 10 located at the bottom of each bucket 9 allows a return of the liquid film recovered in the bucket to be applied by the liquid film application device R located in the frame B of the machine S.

Il convient par ailleurs de noter que de façon préférée, les organes de raclage mobiles 11, 12 et l'organe de raclage fixe 3 sont décalés verticalement les un par rapport aux autres. Ainsi, l'organe de raclage mobile 11 est surélevé par rapport à l'organe de raclage fixe 3 et l'autre organe de raclage mobile 12 comme cela ressort de la figure 4 , les organes de raclage 3 et 12 étant eux situés à même hauteur. Ainsi, le mécanisme de déplacement 13 automatisé permet le cas échéant lors de son déplacement en translation horizontale pour régler la laize L de dépôt d'un film de surface une superposition au moins partielle de l'organe de raclage mobile 11 avec l'organe de raclage fixe 3. It should also be noted that preferably, the movable scraping members 11, 12 and the fixed scraper member 3 are offset vertically relative to each other. Thus, the movable scraping member 11 is raised relative to the fixed scraper member 3 and the other movable scraping member 12 as is apparent from the figure 4 , the scraping members 3 and 12 being located at the same height. Thus, the automated displacement mechanism 13 makes it possible, if necessary during its displacement in horizontal translation to adjust the width L of deposition of a surface film, to at least partially superpose the mobile doctoring member 11 with the fixed scraping 3.

En référence aux figures 3 et 4 , le mécanisme de déplacement automatisé 13 comporte un bras de support 14 comprenant une platine 141 solidaire d'un arbre 142. La platine 141 est sensiblement verticale supporte de façon pivotante les deux organes de raclage mobiles 11, 12. La platine 141 est fixée, par tout moyen approprié tel que soudage ou boulonnage, sur une première extrémité d'un arbre 142, ladite platine 141 étant perpendiculaire à l'axe longitudinal dudit arbre 142. La seconde extrémité de l'arbre 142 est solidaire d'un transport 15 logé dans un carter 16 de protection, dans lequel est également logé un moteur 17, par exemple un moteur asynchrone usuel, qui coopère avec le transport 15 pour déplacer le bras 14 selon un axe sensiblement horizontal et parallèle à une génératrice du tambour de transfert 2 et perpendiculaire à l'axe longitudinal de l'arbre 142 du bras 14. With reference to figures 3 and 4 , the automated movement mechanism 13 comprises a support arm 14 comprising a plate 141 integral with a shaft 142. The plate 141 is substantially vertical pivotally supports the two movable scraping members 11, 12. The plate 141 is fixed, by any appropriate means such as welding or bolting, on a first end of a shaft 142, said plate 141 being perpendicular to the longitudinal axis of said shaft 142. The second end of the shaft 142 is secured to a transport 15 housed in a housing 16 of protection, which is also housed a motor 17, for example a conventional asynchronous motor, which cooperates with the transport 15 to move the arm 14 along a substantially horizontal axis and parallel to a generatrix of the transfer drum 2 and perpendicular to the longitudinal axis of the shaft 142 of the arm 14.

Représenté plus particulièrement en détail sur les figures 3 et 4 , le transport 15 est de façon préférée selon la présente invention un mécanisme de type vis-écrou.Represented more particularly in detail on figures 3 and 4 , the transport 15 is preferably according to the present invention a screw-nut type mechanism.

Comme cela ressort de la figure 4 , ce transport se compose dans le mode de réalisation représenté d'une traverse parallélépipédique 18 fixée sur le bâti B de la machine S et sur une face arrière de laquelle est vissé le carter de protection 16. La traverse 18 est ouverte sur sa périphérie par une fenêtre d'angle 19 supérieure dans laquelle est logé un chariot 20 de fixation du bras de support 14. Le chariot 20 comporte un corps 201 sensiblement parallélépipédique portant à une extrémité, à l'extérieur de la traverse 18, une platine 202 de section sensiblement trapézoïdale sur laquelle est fixée la seconde extrémité de l'arbre 142 du bras 14, et solidaire à l'extrémité opposée de la platine 202, à la base du corps 201 à l'intérieur de la traverse 18 d'un écrou 21 monté sur un axe fileté 22 coaxial et solidaire dans l'exemple représenté de l'axe d'entrainement du moteur 17. Ainsi, lorsque le moteur 17 est actionné, l'axe fileté 22 est lui-même mis en rotation et entraine un déplacement par engrènement hélicoïdal de l'écrou 21 le long dudit axe 22 et partant, un déplacement horizontal du chariot 20 et du bras de support 14 le long de l'axe fileté, sensiblement parallèlement à une génératrice du tambour de transfert 2. As is apparent from the figure 4 , this transport is composed in the embodiment shown of a parallelepipedic cross member 18 fixed on the frame B of the machine S and on a rear face of which is screwed the protective casing 16. The cross member 18 is open on its periphery by an upper angle window 19 in which is housed a carriage 20 for fixing the support arm 14. The carriage 20 comprises a substantially parallelepipedal body 201 carrying at one end, outside the crosspiece 18, a plate 202 of section substantially trapezoidal on which is fixed the second end of the shaft 142 of the arm 14, and secured to the opposite end of the plate 202 at the base of the body 201 inside the crosspiece 18 of a nut 21 mounted on a coaxial threaded shaft 22 secured in the illustrated example of the drive shaft of the motor 17. Thus, when the motor 17 is actuated, the threaded shaft 22 is itself rotated and causes a die placing by helical engagement of the nut 21 along said axis 22 and thus a horizontal displacement of the carriage 20 and the support arm 14 along the threaded axis, substantially parallel to a generatrix of the transfer drum 2.

Le chariot 20 est également guidé dans son mouvement de translation horizontale au travers de la fenêtre 19 de la traverse 18 par l'intermédiaire de deux rails 24, 25 portés sur les deux parois de la traverse 18 délimitant la fenêtre 19, sur chacun desquels glisse un suiveur de rail 26, 27 fixé sur un bord de la platine 202 du chariot. Le guidage en translation horizontale du chariot 20 et donc du bras 14 portant les organes de raclage mobiles 11, 12 est donc assuré à la fois par le système vis-écrou formé de l'écrou 21 et de l'axe 22 sur lequel est monté le chariot 20 et à la fois par l'ensemble guidant comprenant les rails 24, 25 et suiveurs de rails 26, 27, ensemble guidant qui assure la stabilité en translation horizontale du bras 14 et donc des organes de raclage mobiles 11, 12. The carriage 20 is also guided in its horizontal translation movement through the window 19 of the crossmember 18 by means of two rails 24, 25 carried on the two walls of the crossmember 18 defining the window 19, on each of which slides a rail follower 26, 27 fixed on an edge of the plate 202 of the carriage. The guidance in horizontal translation of the carriage 20 and thus of the arm 14 carrying the movable scraper members 11, 12 is thus ensured both by the screw-nut system formed of the nut 21 and the shaft 22 on which is mounted the carriage 20 and both by the guiding assembly comprising the rails 24, 25 and rail followers 26, 27, together guiding which ensures stability in horizontal translation of the arm 14 and thus movable scraping members 11, 12.

Comme indiqué précédemment, lesdits organes de raclage mobiles 11, 12 sont également mobiles selon une direction sensiblement normale à la surface du tambour 2 de la machine S. Ce mouvement normal à la surface du tambour 2 permet une application sélective de chacun des organes mobiles 11, 12 sur la surface du tambour 2 en fonction du réglage de la laize du film de surface souhaité sur le tambour pour l'application aux feuilles de papier fabriquées.As indicated above, said movable scraping members 11, 12 are also movable in a direction substantially normal to the surface of the drum 2 of the machine S. This normal movement on the surface of the drum 2 allows a selective application of each of the movable members 11 , 12 on the surface of the drum 2 depending on the width of the desired surface film on the drum for application to the manufactured paper sheets.

Pour ce faire, le mécanisme de déplacement automatisé 13 du dispositif de réglage 1 de l'invention comporte un outil de basculement 28 de chaque organe de raclage 11, 12 fixé en rotation sur la platine 141 du bras 14. Cet outil de basculement 28 est avantageusement constitué de façon préféré dans le cadre de l'invention par un vérin 29 hydraulique ou pneumatique monté pivotant sensiblement en son milieu sur un étrier 30 solidaire de la face postérieure de la platine 141, les organes de raclage 11, 12 étant eux montés sur la face antérieure de ladite platine 141. De plus, les vérins 29 sont reliés à l'extrémité de leur tige 291 à l'axe de pivotement des organes de raclage 11, 12 par l'intermédiaire d'une ailette triangulaire 31, pivotante au niveau de l'extrémité de tige de vérin et solidaire de l'axe de pivotement des organes de raclage 11, 12. Les vérins 29 sont par ailleurs de façon classique en soit électrocommandés.To do this, the automated movement mechanism 13 of the adjusting device 1 of the invention comprises a tilting tool 28 of each scraper member 11, 12 fixed in rotation on the plate 141 of the arm 14. This tilting tool 28 is advantageously constituted, in the context of the invention, preferably by a hydraulic or pneumatic jack 29 mounted to pivot substantially in the middle on a stirrup 30 secured to the rear face of the plate 141, the scraping members 11, 12 being mounted on the front face of said plate 141. In addition, the cylinders 29 are connected to the end of their rod 291 to the pivot axis of the scraper members 11, 12 via a triangular fin 31, pivoting to the level of the end of the cylinder rod and secured to the pivot axis of the scraper members 11, 12. The cylinders 29 are also conventionally electrically controlled.

Ainsi, un déplacement de la tige 291 des vérins 29 entraîne nécessairement un pivotement/basculement des organes de raclage 11, 12 autour de leur axe de fixation sur la platine 141, et donc un mouvement de dégagement ou de rapprochement selon une direction sensiblement normale par rapport à la surface du tambour 2. Thus, a displacement of the rod 291 of the cylinders 29 necessarily causes a pivoting / tilting of the scraper members 11, 12 around their axis of attachment to the plate 141, and therefore a release movement or approximation in a substantially normal direction by relative to the surface of the drum 2.

Sur la face antérieure de la platine 141 de chaque dispositif sont enfin installé des buses de projection d'eau 32. Ces buses de projection servent à humidifier la surface du tambour 2 quand l'organe de raclage 11 est en recouvrement avec l'organe de raclage 3. En effet, en recouvrement, l'organe de raclage 3 enlève la totalité du film de surface et le contact de l'organe de raclage 11 ne peut se faire à sec sans endommager le revêtement du tambour 2 et la lame 823. On the front face of the plate 141 of each device are finally installed water spray nozzles 32. These spray nozzles are used to moisten the surface of the drum 2 when the scraper member 11 is in recovery with the body of 3. In effect, in overlap, the scraper member 3 removes the entire surface film and the contact of the scraper member 11 can not be dry without damaging the coating of the drum 2 and the blade 823.

Dans l'exemple représenté sur les figures 1 à 4 , l'organe de raclage fixe 3 de chaque dispositif de réglage 1 de la machine S couvre une zone invariante de largeur L1 =120 mm à partir de chaque bord 2a, 2b du tambour de transfert 2. Les deux organes de raclage fixe 3 définissent ainsi, comme indiqué sur la figure 2 , la laize maximale Lmax d'enduction de la machine S, et plus exactement de ses tambours de transfert 2. La largeur L1 des organes de raclage 3 des deux dispositifs 1 est définie de telle sorte que le format des feuilles de papier à traiter par la machine S, et plus exactement la largeur des feuilles de papier traitées, soit toujours inférieur à la laize maximale Lmax. Lors du fonctionnement de la machine S, l'organe de raclage fixe 3 de chaque dispositif est maintenu en application contre la surface du tambour de transfert 2 et racle le film de surface au niveau des bords 2a, 2b du tambour 2, le film de surface ayant été préalablement déposé sur la surface du tambour par le biais du dispositif d'application R de la machine S. In the example shown on the Figures 1 to 4 , The fixed scraper member 3 of each adjusting device 1 of the machine S covers an invariant region of width L1 = 120 mm from each side 2a, 2b of the transfer drum 2. The two fixed scraper means 3 define as shown on the figure 2 , the maximum width Lmax of coating machine S, and more precisely of its transfer drums 2. The width L1 of the scraping members 3 of the two devices 1 is defined so that the format of the sheets of paper to be treated by the machine S, and more exactly the width of the treated paper sheets, is always less than the maximum width Lmax. During operation of the machine S, the fixed scraper member 3 of each device is held in application against the surface of the transfer drum 2 and scrapes the surface film at the edges 2a, 2b of the drum 2, the film of surface having been previously deposited on the surface of the drum through the application device R of the machine S.

Les organes de raclages mobiles 11, 12 ont quant à eux chacun une largeur L2, de préférence de 125 mm dans l'exemple de réalisation préféré présenté, ce qui signifie qu'ils permettent de racler une largeur supplémentaire de 250 mm en sus des 120 mm raclés par l'organe de raclage fixe 3 depuis les bords 2a, 2b du tambour 2. Ainsi, il est possible grâce à l'application simultanée des organes de raclage mobiles 11, 12 de chaque dispositif 1 de réduire la laize d'enduction L de 500 mm par rapport à la laize maximale Lmax. The movable scrapers 11, 12 each have a width L2 , preferably 125 mm in the preferred embodiment shown, which means that they can scrape an additional width of 250 mm in addition to 120 mm scraped by the fixed scraper member 3 from the edges 2a, 2b of the drum 2. Thus, it is possible through the simultaneous application of movable scraping members 11, 12 of each device 1 to reduce the width of coating L of 500 mm with respect to the maximum width Lmax.

Toutefois, celle amplitude peut être augmentée sans limite par l'adjonction d'autant de organe de raclages mobile supplémentaires que nécessaire.However, this amplitude can be increased without limit by the addition of as many additional mobile scrapers as necessary.

Chacun des organes de raclage fixe et mobile de chaque dispositif 1 est relevable indépendamment des autres par l'intermédiaire des vérins 7, 29 électrocommandés et le bras 14 supportant les organes mobiles 11, 12 possède une course de déplacement horizontal en translation de 125 mm assurée par le transport 15 de l'ensemble de déplacement motorisé 13. Each of the fixed and mobile scraping members of each device 1 is liftable independently of the others by means of the electrically controlled cylinders 7, 29 and the arm 14 supporting the movable members 11, 12 has a 125 mm horizontal displacement in translation movement provided by the transport 15 of the motorized movement assembly 13.

Comme indiqué précédemment, le format maximum des feuilles de papier qu'il est possible de traiter avec la machine S a pour largeur la laize maximale Lmax déterminée par les organes de raclage fixe 3 des dispositifs de réglage 1. Les organes de raclage mobiles 11, 12 desdits dispositifs de réglage permettent ensuite de faire varier la laize d'enduction L en fonction des formats de feuilles de papier de largeur inférieure à Lmax. As indicated above, the maximum format of the sheets of paper that can be processed with the machine S has the maximum width Lmax determined by the fixed scraping members 3 of the adjusting devices 1. The movable scraping members 11, 12 of said adjustment devices then allow to vary the width of coating L according to the paper sheet sizes of width less than Lmax.

Ainsi, lorsque le bord de la feuille se situe dans la tranche Lmax-125mm< bord de feuille <Lmax l'organe de raclage mobile 12 est relevé par l'intermédiaire de son vérin d'actionnement 29, et l'organe de raclage 11 est appliqué contre la surface du tambour 2 pour racler le surplus de film en étant positionné au bord du format du support papier par déplacement latéral du chariot du transport 15 dans la plage de 125 mm autorisée.Thus, when the edge of the sheet is in the slice Lmax-125mm <edge of sheet <Lmax the movable scraping member 12 is raised through its actuating cylinder 29, and the scraper member 11 is pressed against the surface of the drum 2 to scrape the excess film by being positioned at the edge of the format of the paper support by lateral displacement of the transport carriage 15 in the 125 mm authorized range.

Lorsque le bord de la feuille se situe dans la tranche Lmax-250mm< bord de feuille <Lmax-125mm les deux organes de raclage mobile 11, 12 sont appliqués contre la surface du tambour 2, et l'organe de raclage 12 est alors positionné au bord du format du support papier par déplacement latéral du transport 15 dans la plage de 125 mm autorisée.When the edge of the sheet is in the slice Lmax-250mm <edge of sheet <Lmax-125mm the two movable scraping members 11, 12 are applied against the surface of the drum 2, and the scraper member 12 is then positioned at the edge of the format of the paper support by lateral displacement of the transport 15 in the 125 mm authorized range.

De cette façon, il est possible sur chaque bord de racler précisément le film à l'endroit du bord des feuilles de papier traitées quel que soit leur format, en actionnant à distance l'application des deux organes de raclages et leur positionnement latéral.In this way, it is possible on each edge to scrape precisely the film at the edge of the treated paper sheets regardless of their format, by remotely actuating the application of the two scraping members and their lateral positioning.

Lorsque la machine à papier est équipée d'une mesure de format de feuille permettant de générer une consigne de position sur chacun des bords du support papier, il est possible de piloter automatiquement le positionnement de chacun des dispositifs 1 de réglage de la laize d'enduction à partir de la consigne donnée.When the paper machine is equipped with a sheet size measurement for generating a position command on each of the edges of the paper support, it is possible to automatically control the positioning of each of the devices 1 for adjusting the width of the paper. coating from the given instruction.

L'invention n'est pas limitée aux exemples décrits et représentés car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the examples described and shown because various modifications can be made without departing from its scope.

Claims (10)

- Dispositif (1) de réglage de la laize (L) de dépôt d'un film de surface sur une bande de papier, le dispositif étant destiné à coopérer avec au moins un tambour de transfert (2) dudit film sur une bande de papier, et comportant au moins un organe de raclage fixe (3) apte à frotter contre ledit tambour de transfert dudit film de surface et adapté pour délimiter la laize maximale (Lmax) du film à déposer, et caractérisé en ce qu'il comporte au moins un organe de raclage mobile (11, 12) apte à se déplacer selon au moins une première direction sensiblement normale à la surface du tambour de transfert, et selon au moins une direction sensiblement parallèle à une génératrice dudit tambour de transfert (2), le(s) dit(s) organe(s) de raclage mobile (11, 12) coopérant avec un mécanisme de déplacement (13) automatisé, de manière à régler la laize (L) du film de surface sur le tambour de transfert (2) entre une valeur minimale (Lmin) et une valeur maximale (Lmax) déterminée par l'organe de raclage fixe. - Device (1) for adjusting the width (L) for depositing a surface film on a strip of paper, the device being intended to cooperate with at least one transfer drum (2) of said film on a paper strip and comprising at least one fixed scraper member (3) adapted to rub against said transfer drum of said surface film and adapted to delimit the maximum width (Lmax) of the film to be deposited, and characterized in that it comprises at least a movable scraper member (11, 12) adapted to move in at least a first direction substantially normal to the surface of the transfer drum, and in at least one direction substantially parallel to a generatrix of said transfer drum (2), the (s) said movable scraping member (11, 12) cooperating with an automated moving mechanism (13), so as to adjust the width (L) of the surface film on the transfer drum (2) ) between a minimum value (Lmin) and a maximum value (Lmax) d determined by the stationary scraper. - Dispositif de réglage selon la revendication 1, caractérisé en ce que le mécanisme de déplacement (13) automatisé comporte un transport (15) de translation du (des) organe(s) de raclage mobile(s) (11, 12) selon une direction sensiblement parallèle à une génératrice du tambour de transfert et des moyens (28, 29) de basculement du (des) dit(s) organe(s) de raclage mobile(s), sur le tambour de transfert. - adjusting device according to claim 1, characterized in that the displacement mechanism (13) Automated comprises a carriage (15) of translation of the (of) element (s) movable scraper (s) (11, 12) in a direction substantially parallel to a generatrix of the transfer drum and means (28, 29) of tilting said (s) member (s) mobile scraping (s) on the transfer drum. - Dispositif de réglage selon la revendication 2, caractérisé en ce que le transport (15) de translation comportent un chariot (20) de support des organes de raclage mobile (11, 12) et des moyens moteurs (17, 21, 22) de déplacement dudit chariot en translation selon une direction parallèle à une génératrice du tambour de transfert donnée par des moyens de guidage (24, 25, 26, 27). - Adjustment device according to claim 2, characterized in that the translational transport (15) comprises a carriage (20) for supporting the movable scraping members (11, 12) and motor means (17, 21, 22) of moving said carriage in translation in a direction parallel to a generatrix of the transfer drum given by guide means (24, 25, 26, 27). - Dispositif de réglage selon la revendication 3, caractérisé en ce que le transport (15) est de type vis-écrou et le chariot (20) de support est monté solidaire d'un écrou (21) coopérant avec un axe fileté (22) actionné en rotation par un moteur (17). - Adjustment device according to claim 3, characterized in that the transport (15) is screw-nut type and the carriage (20) support is mounted integral with a nut (21) cooperating with a threaded shaft (22) rotated by a motor (17). - Dispositif de réglage selon l'une des revendications 2 à 4, caractérisé en ce que les moyens de basculement (28) des organes de raclage mobiles sur le tambour de transfert comportent au moins un vérin (29). - Adjustment device according to one of claims 2 to 4, characterized in that the tilting means (28) of the scraping members movable on the transfer drum comprise at least one jack (29). - Dispositif de réglage selon l'une des revendications 1 à 5, caractérisé en ce que les organes de raclage mobiles (11, 12) et l'organe de raclage fixe (3) sont décalés verticalement l'un par rapport à l'autre et le mécanisme de déplacement (13) automatisé permet une superposition au moins partielle de l'organe de raclage mobile avec l'organe de raclage fixe. - Adjustment device according to one of claims 1 to 5, characterized in that the movable scraping members (11, 12) and the fixed scraper member (3) are offset vertically relative to each other and the automated displacement mechanism (13) allows at least partial superposition of the movable scraper member with the fixed scraper member. - Dispositif de réglage selon l'une des revendications 1 à 6, caractérisé en ce qu'il comporte au moins deux organes (11, 12) de raclage mobiles décalés verticalement l'un par rapport à l'autre, les dits organes de raclage mobiles étant solidaires du mécanisme de déplacement (13) automatisé. - Adjustment device according to one of claims 1 to 6, characterized in that it comprises at least two movable scraping members (11, 12) offset vertically relative to each other, said scraping members mobile devices being integral with the automated movement mechanism (13). - Dispositif de réglage selon la revendication 7, caractérisé en ce que les organes (11, 12) de raclage mobiles sont montés pivotant sur le chariot (20) de déplacement et coopèrent chacun avec un vérin (29) de basculement. - Adjustment device according to claim 7, characterized in that the movable scraper members (11, 12) are pivotally mounted on the carriage (20) of displacement and each cooperate with a jack (29) tilting. - Dispositif de réglage selon l'un des revendications 1 à 8, caractérisé en ce que les organes de raclage fixe (3) et mobiles (11, 12) comportent chacun un racle de frottement (823) contre le tambour (2) et un godet (9) de récupération du film de surface raclé sur le tambour, ledit godet de récupération étant disposé sous le racle de frottement (823), de manière à récupérer ledit film de surface s'écoulant par gravité sous ladite plaque, après raclage de la surface du tambour de transfert. - Adjustment device according to one of claims 1 to 8, characterized in that the fixed scraping members (3) and movable (11, 12) each comprise a friction scraper (823) against the drum (2) and a bucket (9) for recovering the scraped surface film on the drum, said recovery bucket being arranged under the friction scraper (823), so as to recover said surface film flowing by gravity under said plate, after scraping of the surface of the transfer drum. - Système (S) d'application d'un film de surface sur une bande de papier, comportant au moins deux tambours (2), dont au moins un comporte des organes (R) d'application de film de surface liquide sur la surface desdits tambours (2) pour le transférer sur une dite bande de papier circulée entre lesdits tambours, ainsi qu'un dispositif d'entraînement en rotation en sens inverse des dits tambours, caractérisé en ce qu'il comporte pour chaque tambour (2) doté d'organes d'application, au moins deux dispositifs (1) de réglage de la laize du film de surface à appliquer conformes chacun à l'une des revendications 1 à 9, lesdits dispositifs de réglage de la laize du film de surface à appliquer étant positionnés deux à deux de manière symétrique l'un de l'autre relativement au plan transversal médian (P) du tambour et de façon adaptée à ce que l'organe de raclage fixe (3) de chaque dispositif (1) appuie tangentiellement sur la surface dudit tambour (2) au niveau de chaque extrémité (2a, 2b) de celui-ci. - System (S) for applying a surface film on a paper web, comprising at least two drums (2), at least one of which comprises members (R) for applying liquid surface film to the surface said drums (2) for transferring it to a said strip of paper circulated between said drums, as well as a device for rotating in the opposite direction of said drums, characterized in that it comprises for each drum (2) endowed with of application members, at least two devices (1) for adjusting the width of the surface film to be applied, each according to one of claims 1 to 9, said devices for adjusting the width of the film of surface to be applied being positioned in pairs symmetrically with each other relative to the median transverse plane (P) of the drum and adapted so that the fixed scraper member (3) of each device (1) bears tangentially on the surface of said drum (2) at each end (2a, 2b) thereof.
EP10157065.3A 2009-03-24 2010-03-19 Device for regulating the width of a film surface on a paper web Active EP2233215B1 (en)

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PL10157065T PL2233215T3 (en) 2009-03-24 2010-03-19 Device for regulating the width of a film surface on a paper web
SI201030812T SI2233215T1 (en) 2009-03-24 2010-03-19 Device for regulating the width of a film surface on a paper web

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FR0951899A FR2943692B1 (en) 2009-03-24 2009-03-24 DEVICE FOR ADJUSTING THE LAIZE OF A SURFACE FILM ON A PAPER STRIP

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CN107824402A (en) * 2017-10-27 2018-03-23 浙江越千树数码科技有限公司 A kind of glue recovering mechanism

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CN105214889A (en) * 2015-08-28 2016-01-06 张家港飞腾铝塑板股份有限公司 A kind of multicolor roller mechanism
CN105251668B (en) * 2015-09-30 2017-08-22 大连理工大学 A kind of device and method for preparing microwave absorbing coating
CN114367418A (en) * 2020-10-15 2022-04-19 衡阳功整钢纤维有限公司 Steel fiber yarn frictioning device

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EP0829575A1 (en) * 1996-09-12 1998-03-18 Voith Sulzer Papiermaschinen GmbH Process and device for direct or indirect application of liquid or pasty media on a running material web
US6468592B1 (en) * 1997-08-15 2002-10-22 Jagenberg Papiertechnik Gmbh Applying a pigment coating to a paper or cardboard strip
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PL2233215T3 (en) 2015-02-27
FR2943692A1 (en) 2010-10-01
SI2233215T1 (en) 2015-01-30
FR2943692B1 (en) 2011-04-22
ES2524945T3 (en) 2014-12-15
PT2233215E (en) 2014-12-05
EP2233215B1 (en) 2014-08-27

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