EP0291032A2 - Method and apparatus for compacting and consolidating a mat - Google Patents

Method and apparatus for compacting and consolidating a mat Download PDF

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Publication number
EP0291032A2
EP0291032A2 EP19880107549 EP88107549A EP0291032A2 EP 0291032 A2 EP0291032 A2 EP 0291032A2 EP 19880107549 EP19880107549 EP 19880107549 EP 88107549 A EP88107549 A EP 88107549A EP 0291032 A2 EP0291032 A2 EP 0291032A2
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EP
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Prior art keywords
scrim
soles
profiles
bores
laid structure
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EP19880107549
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German (de)
French (fr)
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EP0291032A3 (en
Inventor
Horst-Dieter Rector
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WANNAGAT, HORST
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Individual
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    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00Needling machines
    • D04H18/04Needling machines with water jets
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically

Definitions

  • the invention relates to a method and a device for solidifying a scrim of a mat formed from continuous threads or cut fibers or similar material particles.
  • at least one side of the continuously transported scrim is directed essentially perpendicular to its plane, the material particles interlacing and / or matting, usually made of air, fluid jets.
  • the invention preferably relates to a method and a device in order to achieve solidification of the scrim exclusively by swirling the material particles.
  • DE-AS 11 57 513 already discloses a method for producing a mat from endless threads or staple fibers.
  • a large number of threads or fibers are blown onto a permeable surface, continuously collected there to form a layer and connected to form a uniform product.
  • gas jets are directed vertically against the scrim and, through the pressure of the gas layers entering the scrim, the threads or fibers are interwoven and matted with themselves.
  • the clutch is progressively advancing under the gas jets.
  • a system is described which essentially consists of a clutch receiving conveyor belt, over which a blow pipe provided with nozzles extends transversely, while a suction box is arranged under the gas-permeable conveyor belt.
  • a device for treating textile material with which gas jets are directed against the material surface.
  • the material fabric is passed freely sliding between two rows of nozzles arranged opposite one another.
  • An air roller is generated by two oppositely directed nozzle jets, in which the continuous threads or cut fibers of the scrim freely sliding between the nozzles are partially driven away on both sides. This enables a high degree of entanglement to be achieved and a mat with a relatively high tensile strength to be produced.
  • the product produced with this device also has an extremely pronounced entanglement pattern in the longitudinal direction.
  • the longitudinally patterned surface material must be at 90 ° in its Plane rotated and again guided through the known device, which of course can only be done discontinuously with sheet material divided into pieces, so that the usual requirement to obtain as long as possible mat webs as an end product cannot be met.
  • the invention has for its object to improve a method of the type described above so that the product has no surface markings caused by the fluid jets and oriented in one direction.
  • the fluid jets are continuously pivoted at the transport speed of the scrim during their period of action on the scrim, there is no relative movement between the points of impact of the fluid jets and the scrim, so that a longitudinally oriented swirl pattern is avoided.
  • a device with the features specified in the characterizing part of claim 2 is suitable for carrying out the method according to the invention.
  • the device according to the invention is not only characterized in that it makes it possible to avoid a relative movement between the fluid jets impinging on the scrim and the scrim, but also in that a single unit is sufficient for transporting, compacting and strengthening the scrim.
  • rollers according to the invention chambers acted upon by fluid jets are formed between adjacent profiles, from which the continuous filaments or cut fibers cannot escape and instead are intermingled intensively, which leads to dense interweaving or matting of the scrim and thereby to a firm mat.
  • the soles which are of semicircular concavity in cross section, merge into lateral boundaries of the profiles, for which purpose the central axes of the holes lying opposite one another in pairs opposite the soles are aligned approximately tangentially and open into individual chambers defined by the soles.
  • This configuration creates roller-shaped fluid vortices in the individual chambers, which optimize the interweaving and matting of the continuous threads or cut fibers.
  • the device according to FIG. 1 is provided with a hollow axis 10 which is under the pressure of a preferably gaseous working medium, for example air, and a roller 11 which is driven to rotate on it.
  • the hollow axis 10 is provided with a slot 12 over the working width.
  • the volume flow of the working fluid escaping through the slot 12 is controlled via a schematically illustrated valve 13.
  • the roller 11 rotating on the hollow axis 10 is provided with bores 14a and 14b evenly distributed over the entire surface.
  • the working medium emerging through the slot 12 of the hollow shaft 10 in accordance with the arrows 9 only flows through the bores 14a and 14b of the roller 11 located above the slot 12.
  • the driven roller 11 is assigned a likewise driven roller 15, which is given profiles 16 by radially outwardly projecting, tapering webs. Semicircular concave soles 17 lie between the webs.
  • the profiles 16 engage with their tips in groove-shaped profiles 18 of the roller 11.
  • chambers 19 are formed (FIGS. 1 and 3).
  • the holes 14a and 14b in the roller 11 are arranged so that in different chambers defined by the profiles 16, 18 a pair of holes 14a and et.
  • the two bores 14a and 14b are slightly offset from one another (FIGS. 4a to c).
  • Working medium jets 20a and 20b flowing through the two bores 14a and 14b strike the two opposite flanks of the profile soles 17.
  • Endless threads or cut fibers 23 are applied to the roller 15 by a conventional feed mechanism 24.
  • a grooved press roller 25 presses a scrim 26 thus created between the profiles 16 and against the profile soles 17th
  • FIG. 5 shows the scrim 26 not yet pressed by the press-in roller 25 onto the profile soles 17 and
  • FIG. 6 shows the structure of the scrim in the form of a mat 28 which is swirled in a punctiform manner.
  • the intensity of the swirling and thus the strength of the mat 28 produced from the scrim 26 is determined by the applied pressure of the fluid, the cross section of the bores 14a and 14b and the swirling time, the latter determining the working speed of the device for a given roller diameter, since it is direct depends on the peripheral speed of the rollers 11 and 15 and the width of the slot 12 in the hollow axis 10.
  • FIG. 7 shows a further exemplary embodiment of a device according to the invention, in which two rollers 29 of the same design are used.
  • Each roller 29 is in turn driven on the hollow axis 10 which is under working medium pressure.
  • the hollow axis 10 is provided with a slot 12 over the working width (FIG. 2).
  • the volume flow of the fluid is in turn controlled via solenoid valves 13.
  • the rollers 29, each rotating on a hollow axis 10, are provided with bores 30a and 30b (FIG. 8) distributed over the entire surface.
  • the rays emerging through the slot 12 of each hollow axis 10 according to the arrows 33 each flow through only the bores 30a and 30b of the rollers 29 located in the area of the slot 12.
  • the profiles 32 of the rollers 29 are designed such that, in the event of a slightly offset engagement (FIG. 8a), the two rollers 29 form chambers 31 which are defined by the tip-shaped profiles 32 and the semicircular soles 17.
  • the bores 30a and 30b are arranged so that a total of four bores open into each chamber 31, namely two straight bores 30a from the profile tips 32 and two obliquely aligned bores 30b from the profile soles 17 (FIGS. 8a and 8b).
  • the working medium flowing into the chamber 31 through the four bores 30a and 30b forms an intensive flow roller limited to the chamber 31.
  • the relaxed working medium then escapes again upwards or downwards in the direction of the arrows 22a or 22b tangential to the two rollers 29.
  • the filaments or cut fibers 23 are applied practically in the same way as in the device described above, whereas in the device described here two fabrics 26 are joined and swirled in the chambers 31.
  • This device therefore allows very heavy and dense mats to be produced, the profile engagement depth of the two rollers 29 being able to be adapted to the desired mat thickness (FIGS. 8a and 8b).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

To produce a mat from continuous filaments or staple fibres or the like, a laid structure formed from these particulate materials is subjected to the action of fluid jets which are directed perpendicularly against the plane of the laid structure and which impinge upon the laid structure in a uniform manner in rows of dots. As the laid structure moves by, the fluid jets are pivoted in such a way that no relative motion results between their points of impingement and the laid structure. This process is carried out using two driven rolls (11, 15), of which at least one is rotatably mounted on a hollow axle (10) and equipped with radial holes (14a, 14b) which are arranged over the circumference in uniform distribution. The rolls (11, 15) are provided with profiles (18 and 16 respectively) via which they engage with one another to form, in the engagement zone, chambers (19) within which the holes (14a and 14b) end and intensively fluidise the particulate materials contained therein. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Verfestigen eines aus Endlosfäden oder Schnittfasern oder dergleichen Werkstoffteilchen gebildeten Geleges einer Matte. Dabei werden gegen mindestens eine Seite des kontinuierlich transportierten Geleges im wesentlichen senkrecht zu dessen Ebene die Werkstoffteilchen miteinander verflechtende und/oder verfilzende, in der Regel aus Luft gebildete Fluidstrahlen gerichtet. Vorzugsweise betrifft die Erfindung ein Verfahren und eine Vorrichtung, um eine Verfestigung des Geleges ausschließlich durch eine Verwirbelung der Werkstoffteilchen zu erreichen.The invention relates to a method and a device for solidifying a scrim of a mat formed from continuous threads or cut fibers or similar material particles. In this case, at least one side of the continuously transported scrim is directed essentially perpendicular to its plane, the material particles interlacing and / or matting, usually made of air, fluid jets. The invention preferably relates to a method and a device in order to achieve solidification of the scrim exclusively by swirling the material particles.

Aus der DE-AS 11 57 513 ist bereits ein Verfahren zur Herstellung einer Matte aus endlosen Fäden oder Stapelfasern bekannt. Dabei wird eine Vielzahl von Fäden oder Fasern auf eine durchlässige Oberfläche geblasen, dort fortlaufend zu einer Schicht gesammelt und zu einem einheitlichen Produkt verbunden. Zur Verdichtung und Verfestigung des so gebildeten Geleges werden senkrecht gegen das Gelege Gasstrahlen gerichtet und durch den Druck der in das Gelege eintretenden Gasschichten die Fäden oder Fasern mit sich selbst verflochten und verfilzt. Unterdessen wird das Gelege fortschreitend unter den Gasstrahlen vorgerückt. Zur Durchführung dieses bekannten Verfahrens wird eine Anlage beschrieben, die im wesentlichen aus einem das Gelege aufnehmenden Förderband besteht, worüber sich quer ein mit Düsen versehenes Blasrohr erstreckt, während unter dem gasdurchlässigen Förderband ein Saugkasten angeordnet ist.DE-AS 11 57 513 already discloses a method for producing a mat from endless threads or staple fibers. A large number of threads or fibers are blown onto a permeable surface, continuously collected there to form a layer and connected to form a uniform product. To compress and solidify the scrim thus formed, gas jets are directed vertically against the scrim and, through the pressure of the gas layers entering the scrim, the threads or fibers are interwoven and matted with themselves. Meanwhile, the clutch is progressively advancing under the gas jets. To carry out this known method, a system is described which essentially consists of a clutch receiving conveyor belt, over which a blow pipe provided with nozzles extends transversely, while a suction box is arranged under the gas-permeable conveyor belt.

Bedingt durch die stationären Düsen einerseits und das kontinuierlich transportierte Gelege andererseits entsteht bei der Durchführung des bekannten Verfahrens zwangsläufig ein ausgeprägtes, sich in Längsrichtung erstreckendes Verschlingungsmuster, was bei bestimmten Einsatzzwecken einer Matte nicht erwünscht ist.Due to the stationary nozzles, on the one hand, and the continuously transported scrim, on the other hand, when the known method is carried out, a pronounced intertwining pattern is inevitable, which is not desirable for certain uses of a mat.

Weiterhin ist aus der DE-AS 16 35 593 eine Vorrichtung zum Behandeln von Textilmaterial bekannt, mit der gegen die Materialoberfläche Gasstrahlen gerichtet werden. Dabei wird das Materialgelege zwischen zwei einander entgegengesetzt angeordneten Reihen von Düsen frei gleitend hindurchgeführt. Durch jeweils zwei gegeneinander gerichtete Düsenstrahlen wird eine Luftwalze erzeugt, in der die Endlosfäden bzw. Schnittfasern des zwischen den Düsen frei gleitenden Geleges teilweise nach beiden Seiten weggetrieben werden. Hierdurch läßt sich ein hoher Verschlingungsgrad erreichen und eine Matte mit einer relativ hohen Zugfestigkeit erzeugen.Furthermore, from DE-AS 16 35 593 a device for treating textile material is known, with which gas jets are directed against the material surface. The material fabric is passed freely sliding between two rows of nozzles arranged opposite one another. An air roller is generated by two oppositely directed nozzle jets, in which the continuous threads or cut fibers of the scrim freely sliding between the nozzles are partially driven away on both sides. This enables a high degree of entanglement to be achieved and a mat with a relatively high tensile strength to be produced.

Aber auch das mit dieser Vorrichtung erzeugte Produkt weist ein in Längsrichtung außerordentlich stark ausgeprägtes Verschlingungsmuster auf. Um ein in Längs- und Querrichtung gleichermaßen verschlungenes Produkt zu erzeugen, muß das zunächst längsgemusterte Flächenmaterial um 90° in seiner Ebene gedreht und erneut durch die bekannte Vorrichtung geführt werden, was naturgemäß jedoch nur diskontinuierlich mit in Stücken unterteiltem Bahnmaterial erfolgen kann, so daß die übliche Forderung, als Endprodukt möglichst lange Mattenbahnen zu erhalten, nicht erfüllt werden kann.But the product produced with this device also has an extremely pronounced entanglement pattern in the longitudinal direction. In order to produce a product that is equally intertwined in the longitudinal and transverse directions, the longitudinally patterned surface material must be at 90 ° in its Plane rotated and again guided through the known device, which of course can only be done discontinuously with sheet material divided into pieces, so that the usual requirement to obtain as long as possible mat webs as an end product cannot be met.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs beschriebenen Art so zu verbessern, daß das Produkt keine durch die Fluidstrahlen verursachte, in einer Richtung orientierte Oberflächenmarkierungen aufweist.The invention has for its object to improve a method of the type described above so that the product has no surface markings caused by the fluid jets and oriented in one direction.

Zur Lösung dieser Aufgabe wird von einem Verfahren der im Oberbegriff des Anspruchs 1 beschriebenen Art ausgegangen und erfindungsgemäß vorgeschlagen, nach der im kennzeichnenden Teil des Anspruchs 1 angegebenen Lehre zu verfahren.To achieve this object, a method of the type described in the preamble of claim 1 is assumed and proposed according to the invention to proceed according to the teaching specified in the characterizing part of claim 1.

Da nach dem erfindungsgemäßen Verfahren die Fluidstrahlen während ihrer Einwirkungsdauer auf das Gelege kontinuierlich mit der Transportgeschwindigkeit des Geleges verschwenkt werden, entfällt eine Relativbewegung zwischen den Auftreffpunkten der Fluidstrahlen und dem Gelege, so daß ein längsorientiertes Verwirbelungsmuster vermieden wird.Since, according to the method according to the invention, the fluid jets are continuously pivoted at the transport speed of the scrim during their period of action on the scrim, there is no relative movement between the points of impact of the fluid jets and the scrim, so that a longitudinally oriented swirl pattern is avoided.

Zur Durchführung des erfindungsgemäßen Verfahrens eignet sich eine Vorrichtung mit den Merkmalen, die im kennzeichnenden Teil des Anspruchs 2 angegeben sind.A device with the features specified in the characterizing part of claim 2 is suitable for carrying out the method according to the invention.

Die erfindungsgemäße Vorrichtung zeichnet sich nicht nur dadurch aus, daß sie es ermöglicht, zwischen den auf das Gelege auftreffenden Fluidstrahlen und dem Gelege eine Relativbewegung zu vermeiden, sondern zusätzlich auch dadurch, daß zum Transport sowie zur Verdichtung und Verfestigung des Geleges ein einziges Aggregat ausreicht.The device according to the invention is not only characterized in that it makes it possible to avoid a relative movement between the fluid jets impinging on the scrim and the scrim, but also in that a single unit is sufficient for transporting, compacting and strengthening the scrim.

Mit den erfindungsgemäßen Walzen entstehen zwischen benachbarten Profilen durch Fluidstrahlen beaufschlagte Kammern, aus denen die Endlosfäden bzw. Schnittfasern nicht entweichen können und statt dessen intensiv miteinander verwirbelt werden, was zu einer dichten Verflechtung bzw. Verfilzung des Geleges und dadurch zu einer festen Matte führt.With the rollers according to the invention, chambers acted upon by fluid jets are formed between adjacent profiles, from which the continuous filaments or cut fibers cannot escape and instead are intermingled intensively, which leads to dense interweaving or matting of the scrim and thereby to a firm mat.

Nach einer Ausgestaltung der erfindungsgemäßen Vorrichtung gehen die im Querschnitt halbkreisförmig konkav ausgebildeten Sohlen in seitliche Begrenzungen der Profile über, wozu die Mittelachsen der nacheinander paarweise den Sohlen gegnüberliegenden Bohrungen etwa tangential ausgerichtet sind und in einzelne durch die Sohlen definierte Kammern münden.According to an embodiment of the device according to the invention, the soles, which are of semicircular concavity in cross section, merge into lateral boundaries of the profiles, for which purpose the central axes of the holes lying opposite one another in pairs opposite the soles are aligned approximately tangentially and open into individual chambers defined by the soles.

Durch diese Ausgestaltung entstehen in den einzelnen Kammern walzenförmige Fluidwirbel, welche die Verflechtung und Verfilzung der Endlosfäden bzw. Schnittfasern optimieren.This configuration creates roller-shaped fluid vortices in the individual chambers, which optimize the interweaving and matting of the continuous threads or cut fibers.

In der Zeichnung sind Ausführungsbeispiele erfindungsgemäßer Vorrichtungen dargestellt. Es zeigen:

  • Fig. 1 eine Vorrichtung aus zwei im Querschnitt dargestellten Walzen, von denen nur eine zur Erzeugung von Fluidstrahlen ausgebildet ist;
  • Fig. 2 eine schematisch dargestellte Hohlachse in einer Seitenansicht;
  • Fig. 3 eine gestreckte Querschnittsdarstellung eines Teilstücks des jeweiligen Mantels der Walzen gemäß Fig. 1;
  • Fig. 4 a, b, c drei Draufsichten auf einen von Fasern überlagerten, vergrößert dargestellten Kammerbereich mit jeweils zwei versetzt zueinander dargestellten Auftreffpunkten der Fluidstrahlen;
  • Fig. 5 eine Draufsicht auf ein Gelege vor seiner Verdichtung und Verfestigung;
  • Fig. 6 eine Draufsicht auf ein Gelege nach seiner Verdichtung und Verfestigung;
  • Fig. 7 eine Vorrichtung aus zwei im Querschnitt dargestellten Walzen, die beide zur Erzeugung von Fluidstrahlen ausgebildet sind;
  • Fig. 8a, b in unterschiedlicher Eindringtiefe der Profilierung je eine gestreckte Querschnittsdarstellung von Teilstücken des jeweiligen Mantels der Walzen gemäß Fig. 7.
Exemplary embodiments of devices according to the invention are shown in the drawing. Show it:
  • Figure 1 shows a device made of two rollers shown in cross section, of which only one is designed to generate fluid jets.
  • 2 shows a schematically illustrated hollow axis in a side view;
  • FIG. 3 shows an elongated cross-sectional representation of a section of the respective jacket of the rolls according to FIG. 1;
  • 4 a, b, c show three top views of a chamber region, overlaid with fibers, shown enlarged, each with two points of impact of the fluid jets shown offset from one another;
  • Figure 5 is a plan view of a scrim prior to its compression and consolidation.
  • 6 shows a plan view of a scrim after it has been compressed and solidified;
  • 7 shows a device made of two rollers shown in cross section, both of which are designed to generate fluid jets;
  • 8a, b in different penetration depths of the profiling, each an elongated cross-sectional representation of parts of the respective jacket of the rollers according to FIG. 7.

Die Vorrichtung gemäß Fig. 1 ist mit einer unter dem Druck eines vorzugsweise gasförmigen Arbeitsmittels, beispielsweise Luft, stehenden Hohlachse 10 und einer darauf drehend angetriebenen Walze 11 versehen. Die Hohlachse 10 ist, wie Fig. 2 zeigt, über die Arbeitsbreite mit einem Schlitz 12 versehen. Über ein schematisch dargestelltes Ventil 13 wird der Volumenstrom des über den Schlitz 12 austretenden Arbeitsmittels gesteuert. Die auf der Hohlachse 10 drehende Walze 11 ist mit über die gesamte Oberfläche gleichmäßig verteilten Bohrungen 14a und 14b versehen. Das entsprechend den Pfeilen 9 durch den Schlitz 12 der Hohlachse 10 austretende Arbeitsmittel durchströmt nur die sich jeweils über dem Schlitz 12 befindlichen Bohrungen 14a und 14b der Walze 11.The device according to FIG. 1 is provided with a hollow axis 10 which is under the pressure of a preferably gaseous working medium, for example air, and a roller 11 which is driven to rotate on it. 2, the hollow axis 10 is provided with a slot 12 over the working width. The volume flow of the working fluid escaping through the slot 12 is controlled via a schematically illustrated valve 13. The roller 11 rotating on the hollow axis 10 is provided with bores 14a and 14b evenly distributed over the entire surface. The working medium emerging through the slot 12 of the hollow shaft 10 in accordance with the arrows 9 only flows through the bores 14a and 14b of the roller 11 located above the slot 12.

Der angetriebenen Walze 11 ist eine ebenfalls angetriebene Walze 15 zugeordnet, die durch radial nach außen vorstehende, spitz zulaufende Stege Profile 16 erhält. Zwischen den Stegen liegen halbkreisförmige konkave Sohlen 17. Die Profile 16 greifen mit ihren Spitzen in rillenförmige Profile 18 der Walze 11. Im Eingriffsbereich der gegensinnig drehenden Walzen 11 und 15 bilden sich Kammern 19 (Fig. 1 und 3). Die Bohrungen 14a und 14b in der Walze 11 sind so angeordnet, daß in verschiedenen durch die Profile 16, 18 definierten Kammern ein Bohrungspaar 14a und et.The driven roller 11 is assigned a likewise driven roller 15, which is given profiles 16 by radially outwardly projecting, tapering webs. Semicircular concave soles 17 lie between the webs. The profiles 16 engage with their tips in groove-shaped profiles 18 of the roller 11. In the area of engagement of the counter-rotating rollers 11 and 15, chambers 19 are formed (FIGS. 1 and 3). The holes 14a and 14b in the roller 11 are arranged so that in different chambers defined by the profiles 16, 18 a pair of holes 14a and et.

Die beiden Bohrungen 14a und 14b sind leicht gegeneinander versetzt (Fig. 4a bis c). Durch die beiden Bohrungen 14a und 14b entströmende Arbeitsmittelstrahlen 20a und 20b prallen auf die beiden gegenüberliegenden Flanken der Profilsohlen 17.The two bores 14a and 14b are slightly offset from one another (FIGS. 4a to c). Working medium jets 20a and 20b flowing through the two bores 14a and 14b strike the two opposite flanks of the profile soles 17.

Bedingt durch die Bohrungsversetzung bilden sich zwei gegen­sinnig drehende, auf die Kammerausdehnung begrenzte Fluid­walzen 21a und 21b (Fig. 4a). Das entspannte Fluid entweicht anschließend in Richtung der Pfeile 22a und 22b nach oben bzw. unten tangential zu den Walzen 11 und 15.Due to the offset of the bores, two fluid rollers 21a and 21b (FIG. 4a) rotating in opposite directions and limited to the chamber extent are formed. The relaxed fluid then escapes in the direction of the arrows 22a and 22b upwards and downwards tangentially to the rollers 11 and 15.

Endlosfäden bzw. Schnittfasern 23 werden durch ein konven­tionelles Lieferwerk 24 auf die Walze 15 aufgebracht. Eine gerillte Einpreßwalze 25 drückt ein so entstandenes Gelege 26 zwischen die Profile 16 und gegen die Profil­sohlen 17.Endless threads or cut fibers 23 are applied to the roller 15 by a conventional feed mechanism 24. A grooved press roller 25 presses a scrim 26 thus created between the profiles 16 and against the profile soles 17th

Leicht federnd angebrachte, im gleichen Radius wie die Walze 15 gekrümmte Niederhaltestäbe 27 halten das Gelege 26 bis zur Kammerbildung auf den Profilsohlen 17 fest. Gleichzeitig wird dadurch das noch lose Gelege 26 aus dem Bereich des nach oben in Richtung des Pfeiles 22a tangential wegströmenden Fluids herausgehalten. So wie sich die Kammern 19 gegenüber dem Schlitz 12 bilden, beginnt der Verwirbelungsprozeß. Alle in eine Kammer 19 gelangenden, sich in unterschiedlichsten Winkeln kreuzenden Endlosfäden bzw. Schnittfasern des Geleges (Fig. 4b) werden durch die beiden gegensinnig drehenden energiereichen Fluidwalzen 21a und 21b kurzstreckig parallelisiert und intensiv miteinander verwirbelt (Fig. 4c).Slightly spring-mounted hold-down bars 27 curved in the same radius as the roller 15 hold the scrim 26 firmly on the profile soles 17 until the chamber is formed. At the same time, the still loose fabric 26 is thereby kept out of the region of the fluid flowing tangentially away in the direction of arrow 22a. As the chambers 19 form opposite the slot 12, the swirling process begins. All continuous filaments or cut fibers of the scrim reaching into a chamber 19, intersecting at various angles (FIG. 4b), are parallelized in short distances by the two counter-rotating energy-rich fluid rollers 21a and 21b and swirled intensively with one another (FIG. 4c).

Da auf der Oberfläche der Walze 11 nacheinander Reihen von Kammern 19 mit den dazugehörigen Bohrungen 14a und 14b entstehen, wird eine punktförmige, über das Gelege gleichmäßig verteilte Verwirbelungsstruktur erzeugt.Since rows of chambers 19 with the associated bores 14a and 14b are formed one after the other on the surface of the roller 11, a point-shaped swirl structure is evenly distributed over the scrim.

Fig. 5 zeigt das noch nicht durch die Einpreßwalze 25 auf die Profilsohlen 17 gedrückte Gelege 26 und Fig. 6 die Struktur des punktförmig verwirbelten Geleges in Form einer Matte 28.FIG. 5 shows the scrim 26 not yet pressed by the press-in roller 25 onto the profile soles 17 and FIG. 6 shows the structure of the scrim in the form of a mat 28 which is swirled in a punctiform manner.

Die Intensität der Verwirbelung und damit die Festigkeit der aus dem Gelege 26 erzeugten Matte 28 wird durch den angelegten Druck des Fluids, den Querschnitt der Bohrungen 14a und 14b und die Verwirbelungsdauer bestimmt, wobei letztere bei vorgegebenem Walzendurchmesser die Arbeitsgeschwindigkeit der Vorrichtung bestimmt, da sie direkt abhängig ist von der Umfangsgeschwindigkeit der Walzen 11 und 15 und der Breite des Schlitzes 12 in der Hohlachse 10.The intensity of the swirling and thus the strength of the mat 28 produced from the scrim 26 is determined by the applied pressure of the fluid, the cross section of the bores 14a and 14b and the swirling time, the latter determining the working speed of the device for a given roller diameter, since it is direct depends on the peripheral speed of the rollers 11 and 15 and the width of the slot 12 in the hollow axis 10.

Fig. 7 zeigt ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung, bei der zwei gleich ausgebildete Walzen 29 eingesetzt sind.FIG. 7 shows a further exemplary embodiment of a device according to the invention, in which two rollers 29 of the same design are used.

Jede Walze 29 ist wiederum angetrieben auf der unter Arbeitsmitteldruck stehenden Hohlachse 10 gelagert.Each roller 29 is in turn driven on the hollow axis 10 which is under working medium pressure.

Die Hohlachse 10 ist über die Arbeitsbreite mit einem Schlitz 12 versehen (Fig. 2). Über Magnetventile 13 wird wiederum der Volumenstrom des Fluids gesteuert. Die auf je einer Hohlachse 10 drehenden Walzen 29 sind über die gesamte Oberfläche verteilt mit Bohrungen 30a und 30b (Fig. 8) versehen. Die durch den Schlitz 12 jeder Hohlachse 10 gemäß den Pfeilen 33 austretenden Strahlen durchströmen jeweils nur die sich im Bereich des Schlitzes 12 befindlichen Bohrungen 30a und 30b der Walzen 29.The hollow axis 10 is provided with a slot 12 over the working width (FIG. 2). The volume flow of the fluid is in turn controlled via solenoid valves 13. The rollers 29, each rotating on a hollow axis 10, are provided with bores 30a and 30b (FIG. 8) distributed over the entire surface. The rays emerging through the slot 12 of each hollow axis 10 according to the arrows 33 each flow through only the bores 30a and 30b of the rollers 29 located in the area of the slot 12.

Die Profile 32 der Walzen 29 sind so ausgebildet, daß bei einem geringfügig versetzen Eingriff (Fig. 8a) der beiden Walzen 29 Kammern 31 entstehen, die durch die spitzen­förmigen Profile 32 und die halbkreisförmigen Sohlen 17 definiert sind.The profiles 32 of the rollers 29 are designed such that, in the event of a slightly offset engagement (FIG. 8a), the two rollers 29 form chambers 31 which are defined by the tip-shaped profiles 32 and the semicircular soles 17.

Die Bohrungen 30a und 30b sind so angeordnet, daß in jeder Kammer 31 insgesamt vier Bohrungen münden, und zwar zwei gerade ausgerichtete Bohrungen 30a aus den Profilspitzen 32 und zwei schräg ausgerichtete Bohrungen 30b aus den Profilsohlen 17 (Fig. 8a und 8b).The bores 30a and 30b are arranged so that a total of four bores open into each chamber 31, namely two straight bores 30a from the profile tips 32 and two obliquely aligned bores 30b from the profile soles 17 (FIGS. 8a and 8b).

Das durch die vier Bohrungen 30a und 30b jeweils in eine Kammer 31 einströmende Arbeitsmittel bildet eine intensive, auf die Kammer 31 begrenzte Strömungswalze.The working medium flowing into the chamber 31 through the four bores 30a and 30b forms an intensive flow roller limited to the chamber 31.

Das entspannte Arbeitsmittel entweicht anschließend wiederum nach oben bzw. unten in Richtung der Pfeile 22a bzw. 22b tangential zu den beiden Walzen 29.The relaxed working medium then escapes again upwards or downwards in the direction of the arrows 22a or 22b tangential to the two rollers 29.

Das Aufbringen der Endlosfäden bzw. Schnittfasern 23 erfolgt praktisch in der gleichen Weise wie bei der zuvor beschriebenen Vorrichtung, wogegen bei der hier beschriebenen Vorrichtung zwei Gelege 26 in den Kammern 31 zusammengefügt und verwirbelt werden. Diese Vorrichtung erlaubt daher die Erzeugung von sehr schweren und dichten Matten, wobei die Profileingriffstiefe der beiden Walzen 29 der erwünschten Mattendicke angepaßt werden kann (Fig. 8a und 8b).The filaments or cut fibers 23 are applied practically in the same way as in the device described above, whereas in the device described here two fabrics 26 are joined and swirled in the chambers 31. This device therefore allows very heavy and dense mats to be produced, the profile engagement depth of the two rollers 29 being able to be adapted to the desired mat thickness (FIGS. 8a and 8b).

Claims (3)

1. Verfahren zum Verdichten und Verfestigen eines aus Endlosfäden, Schnittfasern oder dergleichen Werkstoffteilchen gebildeten Geleges einer Matte, wobei gegen mindestens eine Seite des kontinuierlich transportierten Geleges im wesentlichen senkrecht zu dessen Ebene die Werkstoffteilchen miteinander verflechtende und/oder verfilzende Fluidstrahlen gerichtet werden, dadurch gekennzeichnet, daß jeder punktförmig auf das Gelege auftreffende Fluidstrahl während der gesamten Auftreffdauer mit der Transportgeschwindigkeit des Geleges in dessen Bewegungsrichtung verschwenkt wird.1. A method for compressing and solidifying a scrim of a mat formed from continuous threads, cut fibers or similar material particles, wherein at least one side of the continuously transported scrim is directed essentially perpendicular to the plane thereof, the material particles intertwining and / or matting fluid jets, characterized in that that each fluid jet impinging on the scrim is pivoted at the transport speed of the scrim in its direction of movement during the entire impact duration. 2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, gekennzeichnet durch zwei über radial nach außen vorstehende Profile (16, 18, 32) miteinander im Eingriff stehende Walzen (11, 15 bzw. 29), von denen mindestens jeweils eine mit über ihren Umfang gleichmäßig verteilten radialen Bohrungen (14a, 14b bzw. 30a, 30b) versehen ist, deren Austrittsöffnungen im Bereich von Sohlen (17) zwischen den Profilen (16, 32) liegen und deren Eintrittsöffnungen nacheinander reihenweise in den Bereich eines Schlitzes (12) überführbar sind, der im Mantel einer Hohlachse (10) vorgesehen ist, auf dem die betreffende Walze gelagert ist.2. Device for performing the method according to claim 1, characterized by two radially outwardly projecting profiles (16, 18, 32) in engagement with each other rollers (11, 15 and 29), of which at least one each with its circumference evenly distributed radial bores (14a, 14b or 30a, 30b) is provided, whose outlet openings are in the area of soles (17) between the profiles (16, 32) and whose inlet openings can be transferred in rows in the area of a slot (12) which is provided in the jacket of a hollow axis (10) on which the roller in question is stored. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die im Querschnitt halbkreisförmig konkav ausgebildeten Sohlen (17) in seitliche Begrenzungen der Profile (16 bzw. 32) übergehen, wozu die Mittelachsen der nach­einander paarweise den Sohlen (17) gegenüberliegenden Bohrungen (14a, 14b bzw. 30a, 30b) etwa tangential ausgerichtet sind und in einzelne durch die Sohlen (17) definierte Kammern (19, 31) münden.3. Apparatus according to claim 2, characterized in that the soles (17) which are semicircularly concave in cross section merge into lateral boundaries of the profiles (16 or 32), for which purpose the central axes of the bores (14a) opposite one another in pairs to the soles (17), 14b or 30a, 30b) are oriented approximately tangentially and open into individual chambers (19, 31) defined by the soles (17).
EP88107549A 1987-05-13 1988-05-11 Method and apparatus for compacting and consolidating a mat Withdrawn EP0291032A3 (en)

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DE19873715898 DE3715898A1 (en) 1987-05-13 1987-05-13 METHOD AND DEVICE FOR COMPRESSING AND STRENGTHENING THE FABRIC OF A MAT
DE3715898 1987-05-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989009298A1 (en) * 1988-03-21 1989-10-05 Automatik Apparate-Maschinenbau Gmbh Process and device for producing spunbonded fabrics
US5670234A (en) * 1993-09-13 1997-09-23 Mcneil-Ppc, Inc. Tricot nonwoven fabric

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10019342B3 (en) * 1999-07-16 2006-02-09 Sächsisches Textilforschungsinstitut e.V. Consolidation of non-woven webs uses gas jets at critical velocity produced by parallel or convergent nozzles

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Publication number Priority date Publication date Assignee Title
US3458905A (en) * 1966-07-05 1969-08-05 Du Pont Apparatus for entangling fibers
US3837046A (en) * 1970-03-24 1974-09-24 Johnson & Johnson Method (closed sandwich with large aperture forming means and perforated backing means)
US3917785A (en) * 1971-01-27 1975-11-04 Johnson & Johnson Method for producing nonwoven fabric

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458905A (en) * 1966-07-05 1969-08-05 Du Pont Apparatus for entangling fibers
US3837046A (en) * 1970-03-24 1974-09-24 Johnson & Johnson Method (closed sandwich with large aperture forming means and perforated backing means)
US3917785A (en) * 1971-01-27 1975-11-04 Johnson & Johnson Method for producing nonwoven fabric

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989009298A1 (en) * 1988-03-21 1989-10-05 Automatik Apparate-Maschinenbau Gmbh Process and device for producing spunbonded fabrics
US5670234A (en) * 1993-09-13 1997-09-23 Mcneil-Ppc, Inc. Tricot nonwoven fabric

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DE3715898A1 (en) 1988-11-24

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