EP0209896A2 - Method and apparatus for decorating metal or plastic containers - Google Patents

Method and apparatus for decorating metal or plastic containers Download PDF

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Publication number
EP0209896A2
EP0209896A2 EP86110123A EP86110123A EP0209896A2 EP 0209896 A2 EP0209896 A2 EP 0209896A2 EP 86110123 A EP86110123 A EP 86110123A EP 86110123 A EP86110123 A EP 86110123A EP 0209896 A2 EP0209896 A2 EP 0209896A2
Authority
EP
European Patent Office
Prior art keywords
container
nozzles
containers
round
longitudinal axis
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
EP86110123A
Other languages
German (de)
French (fr)
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EP0209896B1 (en
EP0209896A3 (en
Inventor
Georg Dr. Bolte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Georg Bolte Te Halle-Westfalen Bondsrepubliek
Original Assignee
Schmalback Lubeca AG
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Filing date
Publication date
Application filed by Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Priority to AT86110123T priority Critical patent/ATE50167T1/en
Publication of EP0209896A2 publication Critical patent/EP0209896A2/en
Publication of EP0209896A3 publication Critical patent/EP0209896A3/en
Application granted granted Critical
Publication of EP0209896B1 publication Critical patent/EP0209896B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0442—Installation or apparatus for applying liquid or other fluent material to separate articles rotated during spraying operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • B41J3/40733—Printing on cylindrical or rotationally symmetrical objects, e. g. on bottles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/413—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material for metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0082—Digital printing on bodies of particular shapes
    • B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/26—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for marking or coding completed packages

Definitions

  • the invention relates to a method for decorating containers made of metal or plastic, as well as glass, cardboard or paper, also as a composite, which are at least partially delimited in cross-section by round or round-oval wall sections, by applying printed images which are at least part of the extend round or round oval wall sections, in particular for the all-round printing of round or oval containers in cross section. Furthermore, the invention relates to a device for performing the aforementioned method.
  • the invention has for its object to provide a method of the type mentioned in such a way that the otherwise necessary printing forms carried by the rollers are eliminated and with one and the same device a pressure-free transfer of a wide variety of printed images is made possible.
  • the method mentioned in the introduction is characterized in that the print image is generated by the ink-jet method using ink or pigmented paint jets by program-controlled application of individual color dots along parallel circumferential lines on the wall as a raster image.
  • the ink jet method is per se, for example known for the application of inscriptions on various documents as well as on pharmaceutical products (DE-OS 28 49 495) and is also used for printing coding strips on packaging containers for optical scanning, however, it is not a blanket printing to generate a decorative printed image, as required for decorating containers.
  • the ink jet method offers the possibility of using the color mixing laws to create complex print images and can also be carried out by contactless application of the individual color dots on surfaces that are not smooth, so that, for example, the corrugated area of these cans in packaging cans the decor picture can be included.
  • a raster image is generated which, with a corresponding sequence of color dots, appears optically as a surface image and no longer as a raster image.
  • a decor change takes place without changing the color and printing form solely by changing the program for the application of the individual color dots, the program control being carried out electronically and by the corresponding selection of the grid with the aid of a partial overlap of the color dots also allowing the halftone generation.
  • the printed image can be generated during easily controllable relative movements between the container and the ink or paint jet generating device.
  • the container can be set in rotational movements while the device for generating the ink or paint jets can be kept stationary. It is useful if the individual color dots are applied along parallel screw lines or line sections. For this it is only necessary, for example, to drive the container in rotation about its longitudinal axis and at the same time to move it continuously in the direction of its longitudinal axis in accordance with the desired pitch of the helix.
  • the individual color dots can be applied directly next to one another and / or partially overlapping one another, the latter being considered in particular for the production of halftones.
  • the containers described above can also be driven to rotate about their longitudinal axis and the spray nozzles can be moved stepwise in the direction of the longitudinal axis of the containers so that the color dots line up in the longitudinal direction and on the circumference of the container.
  • the containers are driven to rotate about their longitudinal axis and the spray nozzles are moved linearly to the longitudinal axis of the containers in such a way that the pitch of the helix generated by the color points of the nozzles is the width of the helix corresponds.
  • the new method is particularly suitable for containers with an annular cylindrical cross section and is particularly suitable for these containers for applying all-round printing.
  • the method is not limited to the use of the aforementioned containers, but it can also be used for containers that are one of the circle annular cross-sectional shape have a different shape.
  • the electronic program control in the ink jet method enables the direct transfer of print images from a template to the containers to be printed.
  • a print template can be optically scanned and divided into pixels with detection of the local and color coordinates, in order to convert the coordinates assigned to the pixels into digital data and to forward them to the program control for the spray nozzles for generating the print image.
  • the digital data can be stored in the usual way on a corresponding data carrier and called up at any time to generate the print image or used for program control of the spray nozzles.
  • the new method can also be carried out using simply designed devices. Appropriate designs of devices for carrying out the method are specified in claims 8 to 12 in detail.
  • FIG. 1 shows a container to be printed, generally designated 1, which in this example is designed as a can to be printed all around.
  • the container is received or clamped between pressure plates 2 and 2a movable in the longitudinal axis of the container, the plate 2a being rotatably held on the shaft 3a, while the plate 2 is connected in a rotationally secure manner to the shaft 3, which in turn can be driven by a motor 4 .
  • a slide arrangement 6 On a rail 5 running parallel to the longitudinal axis of the container 1, a slide arrangement 6 is held so as to be movable in the direction of the double arrow 7 and is connected to a corresponding drive motor 8.
  • the carriage arrangement 6 supports an approximately C-shaped carrier 9 which surrounds the container 1 to be printed on part of its circumference and which is equipped on its side facing the container 1 with nozzles 10 to 13 or nozzle heads directed towards the container surface.
  • the individual nozzles or nozzle heads can be equipped as spray nozzles or nozzle heads for applying different colors in order to fill the container 1 with a four-color Print job.
  • the rotational movement of the container generated by the motor 4 on the one hand and the movement of the carriage 6 by the motor 8 generated in the direction of the longitudinal axis of the container can be coordinated with one another via a control device 14 such that the color dots applied to the container 1 by means of the nozzles or nozzle heads along a helix.
  • the nozzles 10 to 13 or nozzle heads are offset in the direction of the longitudinal axis of the container according to FIG. 3 by a predetermined angle / j, namely the angle / 3 is set so that the individual nozzles or nozzle blocks with their ink or pigmented lacquer jets can reach all points on the surface of the container 1 except for the outermost peripheral edge zones, so that an opaque four-color print can be applied to the circumference of the container.
  • the nozzles or nozzle assemblies are offset by an angular distance ⁇ about the axis of rotation of the container 1.
  • the conveying path 24 of the containers 1 is also indicated, on which the containers are fed to the printing station or from which they are removed from the printing station.
  • the containers 1, which in this case have the shape of bottles, can be transferred to the printing station via a turntable arrangement 15 along the conveying path 24 according to FIG. 2 and removed again from this station.
  • FIG. 4 schematically shows a feed conveyor 16 which the container 1 of the turntable assembly 15 are fed.
  • Another discharge conveyor not shown in the drawing, takes over the printed containers in order to pass them on for further processing.
  • the containers 1 reach the pressure plate 2 which can be driven by a motor 4 and are held between the plates mentioned by means of the pressure plate 2a which can be moved in the direction of the double arrow 17.
  • the turntable arrangement 15 is rotated step by step about its central longitudinal axis 19 by a motor 18, so that the containers 1 each reach the printing station shown in FIG. 2, which is shown schematically in FIG. 4 in the left part of this figure.
  • the container 1 is set into rotational movements via the pressure plate 2 and the motor 4 connected to it, while the carrier 9 is moved with the nozzles 10 to 13 arranged on its inside in a direction parallel to the longitudinal axis of the container via the motor 8, as has already been described in connection with FIGS. 1 to 3.
  • a stepping motor 8 which interacts with the slide 6, can also perform a discontinuous displacement movement of the slide by the width of one color point or, if appropriate, also several color points with a corresponding arrangement of nozzle heads, in order to run parallel to one another in the circumferential direction of the container To generate rows of color dots, which in turn lead to the desired print image.

Abstract

1. A device for decorating containers made of metal, plastics, glass, cardboard or paper, also as composite material, which containers are limited at least partially as seen in cross-section by round or oval wall portions, by applying printed pictures, which extend at least over a part of the round or oval wall portions, to a rotating object, more particularly for all round printing of containers which are round or oval in cross-section, using a movable slide arrangement with nozzles directed on to the object according to the ink jet method with the aid of ink or pigmented paint jets, characterised by a retaining device (2, 2a) accommodating the containers (1) individually, said device engaging the containers outside their outer surfaces to be printed, by a drive device (4), for driving the containers (1) in the retaining device (2, 2a) in rotary manner about their longitudinal axis, by a slide arrangement (6), which is provided spaced from the container (1), which is located in the retaining device (2, 2a), and movable continuously or in steps in parallel with the longitudinal axis of the container, said arrangement (6) having the nozzles (10 to 13) which are directed on to the container (1), said nozzles producing the printed picture as a raster picture in accordance with the ink jet method with the aid of ink or pigmented paint jets by means of program-controlled application of individual coloured dots along parallel peripheral lines on the walls of the container (1) which is to be decorated, and by a sensor for measuring the spacing of the nozzles (10 to 13) from the container (1) in the direction of the jet and by a control and drive device for displacing the nozzles in a direction towards the container or away from it.

Description

Die Erfindung betrifft ein Verfahren zum Dekorieren von Behältern aus Metall oder Kunststoff sowie aus Glas, Pappe oder Papier auch als Verbundstoff, die wenigstens teilweise im Querschnitt gesehen von runden oder rundovalen Wandungsabschnitten begrenzt sind, durch Auftragen von Druckbildern, welche sich zumindest über einen Teil der runden oder rundovalen Wandungsabschnitte erstrecken, insbesondere zum Rundumbedrucken von im Querschnitt runden oder ovalen Behältern. Weiterhin betrifft die Erfindung eine Vorrichtung zur Durchführung des vorgenannten Verfahrens.The invention relates to a method for decorating containers made of metal or plastic, as well as glass, cardboard or paper, also as a composite, which are at least partially delimited in cross-section by round or round-oval wall sections, by applying printed images which are at least part of the extend round or round oval wall sections, in particular for the all-round printing of round or oval containers in cross section. Furthermore, the invention relates to a device for performing the aforementioned method.

Das Dekorieren von Behältern der vorgenannten Art durch Auftragen von Druckbildern erfolgt bisher ausschließlich unter Verwendung von Druckwalzen, welche mit den Behältern im Bereich des aufzubringenden Druckbildes in Kontakt gebracht werden, wobei die Druckwalzen zur Übertragung des Druckbildes mit einem vorbestimmten Druck an die Behälter angedrückt werden müssen. Dabei ist es erforderlich, die Umfangsgeschwindigkeit der Druckwalzen und der Behälter im Bereich der Berührungsflächen zu synchronisieren, was insbesondere bei der Bedruckung von Behältern während einer Förderbewegung zu einem außerordentlich großen Aufwand führt.The decoration of containers of the aforementioned type by applying printed images has hitherto been carried out exclusively using printing rollers which are brought into contact with the containers in the region of the printed image to be applied, the printing rollers being used Transmission of the print image must be pressed onto the container with a predetermined pressure. It is necessary to synchronize the peripheral speed of the pressure rollers and the containers in the area of the contact surfaces, which leads to an extraordinarily great effort, particularly when printing containers during a conveying movement.

Infolge der sich berührenden Oberfläche des Behälters und der Druckwalze können erhebliche Beeinträchtigungen des Druckbildes durch kleinste Fremdkörper in Form von Kratzern oder dgl. auftreten, wenn diese kleinen Fremdkörper zwischen die zu bedruckende Oberfläche und die Druckwalze gelangen. Eine Änderung des Druckbildes erfordert bei den bekannten Verfahren den Austausch der Walzen und ggf. auch der jeweiligen Farbwerke. Mit den bekannten Verfahren ist es in der Regel auch nicht möglich, im Rahmen des aufzubringenden Druckbildes Halbtöne zu drucken.As a result of the contacting surface of the container and the printing roller, considerable impairments of the printed image due to the smallest foreign bodies in the form of scratches or the like can occur if these small foreign bodies get between the surface to be printed and the printing roller. In the known methods, a change in the printed image requires the rollers and possibly also the respective inking units to be replaced. With the known methods, it is also generally not possible to print halftones in the context of the print image to be applied.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der einleitend genannten Art so auszubilden, daß die sonst notwendigen von den Walzen getragenen Druckformen in Fortfall kommen und mit ein und derselben Einrichtung eine andruckfreie Übertragung der verschiedensten Druckbilder ermöglicht wird.The invention has for its object to provide a method of the type mentioned in such a way that the otherwise necessary printing forms carried by the rollers are eliminated and with one and the same device a pressure-free transfer of a wide variety of printed images is made possible.

Zur Lösung vorstehender Aufgabe kennzeichnet sich das einleitend genannte Verfahren erfindungsgemäß dadurch, daß das Druckbild nach der Ink-Jet-Methode mittels Tinten- oder pigmentierten Lackstrahlen durch programmgesteuertes Aufbringen einzelner Farbpunkte entlang paralleler Umfangslinien auf der Wandung als Rasterbild erzeugt wird.To solve the above problem, the method mentioned in the introduction is characterized in that the print image is generated by the ink-jet method using ink or pigmented paint jets by program-controlled application of individual color dots along parallel circumferential lines on the wall as a raster image.

Diew Ink-Jet-Methode ist zwar an sich beispielsweise für das Aufbringen von Beschriftungen auf verschiedenen Unterlagen wie auch auf Arzneimittelformlingen bekannt (DE-OS 28 49 495) und wird auch für das Aufdrucken von Kodierungsstreifen auf Verpackungsbehältern für die optische Abtastung angewendet, jedoch handelt es sich dabei nicht um eine flächendeckende Bedruckung zur Erzeugung eines dekorativen Druckbildes, wie es für das Dekorieren von Behältern gefordert wird.The ink jet method is per se, for example known for the application of inscriptions on various documents as well as on pharmaceutical products (DE-OS 28 49 495) and is also used for printing coding strips on packaging containers for optical scanning, however, it is not a blanket printing to generate a decorative printed image, as required for decorating containers.

Dabei bietet die Ink-Jet-Methode die Möglichkeit, mit Hilfe der Farbmischgesetze eine komplexe Druckbilderzeugung vorzunehmen und läßt sich auch durch das kontaktlose Aufbringen der einzelnen Farbpunkte auf Oberflächen vornehmen, die nicht glatt sind, so daß beispielsweise bei Verpackungsdosen auch der Sickenbereich dieser Dosen in das Dekorbild einbezogen werden kann. Durch entsprechendes Aufbringen der einzelnen Farbpunkte entlang dicht nebeneinander angeordneter paralleler Umfangslinien auf der Wandung des Behälters wird ein Rasterbild erzeugt, welches bei entsprechender Folge der Farbpunkte optisch als Flächenbild und nicht mehr als Rasterbild erscheint. Ein Dekorwechsel erfolgt ohne Farb- und Druckformenwechsel allein durch entsprechende Änderung des Programmes für das Aufbringen der einzelnen Farbpunkte, wobei die Programmsteuerung elektronisch vorgenommen wird und durch die entsprechende Wahl des Rasters mit Hilfe einer teilweisen Überdeckung der Farbpunkte auch die Halbtonerzeugung gestattet.The ink jet method offers the possibility of using the color mixing laws to create complex print images and can also be carried out by contactless application of the individual color dots on surfaces that are not smooth, so that, for example, the corrugated area of these cans in packaging cans the decor picture can be included. By appropriately applying the individual color dots along parallel circumferential lines arranged closely next to one another on the wall of the container, a raster image is generated which, with a corresponding sequence of color dots, appears optically as a surface image and no longer as a raster image. A decor change takes place without changing the color and printing form solely by changing the program for the application of the individual color dots, the program control being carried out electronically and by the corresponding selection of the grid with the aid of a partial overlap of the color dots also allowing the halftone generation.

Durch die Aufbringung der einzelnen Farbpunkte entlang paralleler Umfangslinien auf der Wandung des Behälters läßt sich das Druckbild während einfach steuerbarer Relativbewegungen zwischen dem Behälter und der tinten-oder lackstrahlerzeugenden Einrichtung erzeugen. So kann beispielsweise der Behälter in Rotationsbewegungen versetzt werden, während die Einrichtung zur Erzeugung der Tinten- bzw. Lackstrahlen ortsfest gehalten werden kann. Dabei ist es zweckmäßig, wenn die einzelnen Farbpunkte entlang paralleler Schraubenlinien oder -linienabschnitte aufgebracht werden. Hierzu ist es beispielsweise nur erforderlich, den Behälter um seine Längsachse rotierend anzutreiben und ihn gleichzeitig in Richtung seiner Längsachse kontinuierlich entsprechend der gewünschten Steigung der Schraubenlinie zu bewegen.By applying the individual color dots along parallel circumferential lines on the wall of the container, the printed image can be generated during easily controllable relative movements between the container and the ink or paint jet generating device. For example, the container can be set in rotational movements while the device for generating the ink or paint jets can be kept stationary. It is useful if the individual color dots are applied along parallel screw lines or line sections. For this it is only necessary, for example, to drive the container in rotation about its longitudinal axis and at the same time to move it continuously in the direction of its longitudinal axis in accordance with the desired pitch of the helix.

Die einzelnen Farbpunkte können dabei unmittelbar nebeneinander und/oder teils einander überdeckend aufgebracht werden, wobei letzteres insbesondere für die Halbtonerzeugung in Betracht kommt.The individual color dots can be applied directly next to one another and / or partially overlapping one another, the latter being considered in particular for the production of halftones.

Statt der vorbeschriebenen schraubenlinienartigen Rotationsbewegung der Behälter können diese auch um ihre Längsachse rotierend angetrieben und die Spritzdüsen in Richtung der Längsachse der Behälter schrittweise so bewegt werden, daß sich die Farbpunkte in Längsrichtung und auf dem Umfang des Behälters aneinanderreihen.Instead of the helical rotational movement of the containers described above, they can also be driven to rotate about their longitudinal axis and the spray nozzles can be moved stepwise in the direction of the longitudinal axis of the containers so that the color dots line up in the longitudinal direction and on the circumference of the container.

Um ein optisch deckend in Erscheinung tretendes Dekorbild zu erzeugen, ist es zweckmäßig, wenn die Behälter um ihre Längsachse rotierend angetrieben und die Spritzdüsen linear zur Längsachse der Behälter so bewegt werden, daß die Steigung der von den Farbpunkten der Düsen erzeugten Schraubenlinie der Breite der Schraubenlinie entspricht.In order to create an optically opaque decorative image, it is expedient if the containers are driven to rotate about their longitudinal axis and the spray nozzles are moved linearly to the longitudinal axis of the containers in such a way that the pitch of the helix generated by the color points of the nozzles is the width of the helix corresponds.

Das neue Verfahren ist insbesondere geeignet für Behälter mit kreisringförmigem zylindrischem Querschnitt und eignet sich dabei für diese Behälter insbesondere zum Aufbringen einer Rundumbedruckung. Andererseits ist das Verfahren jedoch nicht zur Anwendung auf die vorgenannten Behälter beschränkt, sondern es läßt sich auch für Behälter verwenden, die eine von der kreisringförmigen Querschnittsgestalt abweichende Form aufweisen. In diesem Falle ist es jedoch zweckmäßig, den Abstand der Spritzdüsen zu dem ihnen jeweils gegenüberliegenden Bereich der Behälteroberfläche konstant zu halten. Dies ist deshalb zweckmäßig, weil anderenfalls durch den unterschiedlichen Abstand der Behälteroberfläche von den Spritzdüsen die aufgebrachten Farbpunkte einen unterschiedlichen Durchmesser bzw. eine unterschiedliche Form aufweisen und hierdurch die Einheitlichkeit des Rasters und auch das farbliche Erscheinungsbild der einzelnen Flächen durch teilweise überdeckende Farbpunkte empfindlich gestört werden kann.The new method is particularly suitable for containers with an annular cylindrical cross section and is particularly suitable for these containers for applying all-round printing. On the other hand, however, the method is not limited to the use of the aforementioned containers, but it can also be used for containers that are one of the circle annular cross-sectional shape have a different shape. In this case, however, it is expedient to keep the distance between the spray nozzles and the region of the container surface opposite them in each case constant. This is expedient because otherwise, due to the different distance of the container surface from the spray nozzles, the applied color dots have a different diameter or a different shape and as a result the uniformity of the grid and also the color appearance of the individual surfaces can be disturbed by partially overlapping color dots .

Die elektronische Programmsteuerung bei der Ink-Jet-Methode ermöglicht die unmittelbare Übertragung von Druckbildern von einer Vorlage auf die zu bedruckenden Behälter. Zu diesem Zweck kann erfindungsgemäß eine Druckvorlage optisch abgetastet und in Bildpunkte unter Erfassung der örtlichen und farblichen Koordinaten unterteilt werden, um die den Bildpunkten zugeordneten Koordinaten in digitale Daten umzuwandeln und der Programmsteuerung für die Spritzdüsen zur Erzeugung des Druckbildes zuzuleiten. Dabei können die digitalen Daten in der üblichen Weise auf einem entsprechenden Datenträger gespeichert und jederzeit zur Erzeugung des Druckbildes abgerufen bzw. zur Programmsteuerung der Spritzdüsen verwendet werden.The electronic program control in the ink jet method enables the direct transfer of print images from a template to the containers to be printed. For this purpose, according to the invention, a print template can be optically scanned and divided into pixels with detection of the local and color coordinates, in order to convert the coordinates assigned to the pixels into digital data and to forward them to the program control for the spray nozzles for generating the print image. The digital data can be stored in the usual way on a corresponding data carrier and called up at any time to generate the print image or used for program control of the spray nozzles.

Im Hinblick auf die bereits obengenannte einfach steuerbare Relativbewegung zwischen dem Behälter und den Spritzdüsen läßt sich das neue Verfahren auch mit einfach gestalteten Vorrichtungen durchführen. Zweckmäßige Ausbildungen von Vorrichtungen zur Durchführung des Verfahrens sind in den Ansprüchen 8 bis 12 im einzelnen angegeben.In view of the easily controllable relative movement between the container and the spray nozzles already mentioned, the new method can also be carried out using simply designed devices. Appropriate designs of devices for carrying out the method are specified in claims 8 to 12 in detail.

Die Erfindung wird anhand der beigefügten schematischen Zeichnungen erläutert.The invention will be explained with reference to the attached schematic drawings.

Es zeigen:

  • Fig. 1 die prinzipielle Ausbildung einer Vorrichtung zur Durchführung des Verfahrens in einem Schnitt entlang der Schnittlinie I-I der Fig. 2,
  • Fig. 2 einen Schnitt durch die Anordnung nach Fig. 1 entlang der Schnittlinie II-II,
  • Fig. 3 eine Abwicklung der Düsenkopfanordnung nach Fig.2,
  • Fig. 4 rein schematisch eine Drehtelleranordnung mit einer Vorrichtung gemäß den Fig. 1 und 2.
Show it:
  • 1 shows the basic design of an apparatus for performing the method in a section along the section line II of FIG. 2,
  • 2 shows a section through the arrangement according to FIG. 1 along the section line II-II,
  • 3 shows a development of the nozzle head arrangement according to FIG. 2,
  • 4 purely schematically a turntable arrangement with a device according to FIGS. 1 and 2.

In der Fig. 1 ist ein insgesamt mit 1 bezeichneter zu bedruckender Behälter erkennbar, welcher in diesem Beispiel als rundum zu bedruckende Dose ausgebildet ist. Der Behälter ist zwischen in Längsachse des Behälters bewegbaren Andruckplatten 2 und 2a aufgenommen bzw. eingespannt, wobei die Platte 2a rotierbar auf der Welle 3a gehalten ist, während die Platte 2 drehsicher mit der Welle 3 verbunden ist, die ihrerseits über einen Motor 4 antreibbar ist.1 shows a container to be printed, generally designated 1, which in this example is designed as a can to be printed all around. The container is received or clamped between pressure plates 2 and 2a movable in the longitudinal axis of the container, the plate 2a being rotatably held on the shaft 3a, while the plate 2 is connected in a rotationally secure manner to the shaft 3, which in turn can be driven by a motor 4 .

Auf einer im Abstand zur Längsachse des Behälters 1 parallel verlaufenden Schiene 5 ist eine Schlittenanordnung 6 in Richtung des Doppelpfeiles 7 verfahrbar gehalten und mit einem entsprechenden Antriebsmotor 8 verbunden. Die Schlittenanordnung 6 stützt einen etwa C-förmigen Träger 9 ab, welcher den zu bedruckenden Behälter 1 auf einem Teil seines Umfanges umgreift und der auf seiner dem Behälter 1 zugekehrten Seite mit auf die Behälteroberfläche gerichteten Düsen 10 bis 13 bzw. Düsenköpfen ausgerüstet ist. Die einzelnen Düsen bzw. Düsenköpfe können dabei als Spritzdüsen bzw. Düsenköpfe für das Aufbringen unterschiedlicher Farben ausgerüstet sein, um den Behälter 1 mit einem Vierfarben-Druckauftrag zu versehen.On a rail 5 running parallel to the longitudinal axis of the container 1, a slide arrangement 6 is held so as to be movable in the direction of the double arrow 7 and is connected to a corresponding drive motor 8. The carriage arrangement 6 supports an approximately C-shaped carrier 9 which surrounds the container 1 to be printed on part of its circumference and which is equipped on its side facing the container 1 with nozzles 10 to 13 or nozzle heads directed towards the container surface. The individual nozzles or nozzle heads can be equipped as spray nozzles or nozzle heads for applying different colors in order to fill the container 1 with a four-color Print job.

Die mittels des Motors 4 erzeugte Rotationsbewegung des Behälters einerseits und die in Richtung der Behälterlängsachse erzeugte Verfahrbewegung des Schlittens 6 mittels des Motors 8 können über eine Steuereinrichtung 14 so aufeinander abgestimmt werden, daß die auf den Behälter 1 mittels der Düsen bzw. Düsenköpfe aufgebrachten Farbpunkte entlang einer Schraubenlinie aufgebracht werden.The rotational movement of the container generated by the motor 4 on the one hand and the movement of the carriage 6 by the motor 8 generated in the direction of the longitudinal axis of the container can be coordinated with one another via a control device 14 such that the color dots applied to the container 1 by means of the nozzles or nozzle heads along a helix.

Die Düsen 10 bis 13 bzw. Düsenköpfe sind dabei in Richtung zur Behälterlängsachse gemäß Fig. 3 um einen vorbestimmten Winkel/j gegeneinander versetzt, und zwar wird der Winkel/3 dabei so eingestellt, daß die einzelnen Düsen bzw. Düsenstöcke mit ihren Tinten- bzw. pigmentierten Lackstrahlen bis auf die äußersten umfänglichen Randzonen sämtliche Stellen der Oberfläche des Behälters 1 erreichen können, so daß ein deckender Vierfarbdruck auf den Behälterumfang aufgebracht werden kann. Die Düsen bzw. Düsenstöcke sind dabei gemäß Fig. 2 um einen Winkelabstand α um die Rotationsachse des Behälters 1 versetzt angeordnet.The nozzles 10 to 13 or nozzle heads are offset in the direction of the longitudinal axis of the container according to FIG. 3 by a predetermined angle / j, namely the angle / 3 is set so that the individual nozzles or nozzle blocks with their ink or pigmented lacquer jets can reach all points on the surface of the container 1 except for the outermost peripheral edge zones, so that an opaque four-color print can be applied to the circumference of the container. 2, the nozzles or nozzle assemblies are offset by an angular distance α about the axis of rotation of the container 1.

In der Fig. 2 ist noch der Förderweg 24 der Behälter 1 angedeutet, auf dem die Behälter der Bedruckungsstation zugeführt bzw. von der sie aus der Bedruckungsstation abgeführt werden.In FIG. 2, the conveying path 24 of the containers 1 is also indicated, on which the containers are fed to the printing station or from which they are removed from the printing station.

Gemäß Fig. 4 können die Behälter 1, welche in diesem Falle die Form von Flaschen aufweisen, über eine Drehtelleranordnung 15 entlang dem Förderweg 24 gemäß Fig. 2 in die Bedruckungsstation überführt und aus dieser Station wieder abgeführt werden.According to FIG. 4, the containers 1, which in this case have the shape of bottles, can be transferred to the printing station via a turntable arrangement 15 along the conveying path 24 according to FIG. 2 and removed again from this station.

Die Fig. 4 zeigt schematisch einen Zuförderer 16, auf welchem die Behälter 1 der Drehtelleranordnung 15 zugeleitet werden. Ein weiterer in der Zeichnung nicht wiedergegebener Abfuhrförderer übernimmt die bedruckten Behälter, um diese der Weiterbehandlung zuzuleiten.4 schematically shows a feed conveyor 16 which the container 1 of the turntable assembly 15 are fed. Another discharge conveyor, not shown in the drawing, takes over the printed containers in order to pass them on for further processing.

Die Behälter 1 gelangen auf die durch einen Motor 4 antreibbare Andruckplatte 2 und werden mittels der in Richtung des Doppelpfeiles 17 bewegbaren Andruckplatte 2a eingespannt zwischen den genannten Platten gehalten. Die Drehtelleranordnung 15 wird über einen Motor 18 schrittweise um ihre Mittellängsachse 19 gedreht, so daß die Behälter 1 jeweils in die in Fig. 2 wiedergegebene Bedruckungsstation gelangen, welche in der Fig. 4 im linken Teil dieser Figur schematisch dargestellt ist. In dieser Position wird der Behälter 1 über die Andruckplatte 2 und den mit dieser verbundenen Motor 4 in Rotationsbewegungen versetzt, während der Träger 9 mit den auf seiner Innenseite angeordneten Düsen 10 bis 13 in Richtung parallel zur Längsachse des Behälters über den Motor 8 verfahren wird, wie dies bereits in Verbindung mit den Figuren 1 bis 3 beschrieben wurde.The containers 1 reach the pressure plate 2 which can be driven by a motor 4 and are held between the plates mentioned by means of the pressure plate 2a which can be moved in the direction of the double arrow 17. The turntable arrangement 15 is rotated step by step about its central longitudinal axis 19 by a motor 18, so that the containers 1 each reach the printing station shown in FIG. 2, which is shown schematically in FIG. 4 in the left part of this figure. In this position, the container 1 is set into rotational movements via the pressure plate 2 and the motor 4 connected to it, while the carrier 9 is moved with the nozzles 10 to 13 arranged on its inside in a direction parallel to the longitudinal axis of the container via the motor 8, as has already been described in connection with FIGS. 1 to 3.

Bei der beschriebenen Anordnung erfolgt die Bedruckung der Behälter 1 mit Hilfe der Düsen bzw. Düsenköpfe entlang einer Schraubenlinie. Statt dessen kann jedoch auch durch einen Schrittschaltmotor 8, welcher mit dem Schlitten 6 zusammenwirkt, eine diskontinuierliche Verschiebebewegung des Schlittens jeweils um die Breite eines Farbpunktes oder ggf. auch mehrerer Farbpunkte bei entsprechender Anordnung von Düsenköpfen erfolgen, um in Umfangsrichtung des Behälters gesehen parallel zueinander verlaufende Farbpunktreihen zu erzeugen, die ihrerseits dann insgesamt zu dem gewünschten Druckbild führen.In the arrangement described, the printing of the containers 1 takes place with the aid of the nozzles or nozzle heads along a helical line. Instead, however, a stepping motor 8, which interacts with the slide 6, can also perform a discontinuous displacement movement of the slide by the width of one color point or, if appropriate, also several color points with a corresponding arrangement of nozzle heads, in order to run parallel to one another in the circumferential direction of the container To generate rows of color dots, which in turn lead to the desired print image.

Claims (12)

1. Verfahren zum Dekorieren von Behältern aus Metall oder Kunststoff sowie aus Glas, Pappe, oder Papier auch als Verbundstoff, die wenigstens teilweise im Querschnitt gesehen von runden oder rundovalen Wandungsabschnitten begrenzt sind, durch Auftragen von Druckbildern, welche sich zumindest über einen Teil der runden oder rundovalen Wandungsabschnitte erstrecken, insbesondere zum Rundumbedrucken von im Querschnitt runden oder ovalen Behältern, dadurch gekennzeichnet, daß das Druckbild nach der Ink-Jet-Methode mittels Tinten-oder pigmentierter Lackstrahlen durch programmgesteuertes Aufbringen einzelner Farbpunkte entlang paralleler Umfangslinien auf der Wandung als Rasterbild erzeugt wird.1. A method for decorating containers made of metal or plastic, as well as glass, cardboard, or paper, also as a composite, which are at least partially delimited in cross-section by round or round-oval wall sections, by applying printed images which are at least over part of the round ones or round-oval wall sections, in particular for the all-round printing of containers which are round or oval in cross-section, characterized in that the printed image is produced according to the ink-jet method by means of ink or pigmented lacquer jets by program-controlled application of individual color dots along parallel circumferential lines on the wall as a raster image . 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die einzelnen Farbpunkte entlang paralleler Schraubenlinien oder -linienabschnitte aufgebracht werden.2. The method according to claim 1, characterized in that the individual color dots are applied along parallel helical lines or line sections. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die einzelnen Farbpunkte unmittelbar nebeneinander und/oder teils einander überdeckend aufgebracht werden.3. The method according to claim 1 or 2, characterized in that the individual color dots are applied directly next to each other and / or partially overlapping. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Behälter um ihre Längsachse rotierend angetrieben und die Spritzdüsen zur Längsachse der Behälter schrittweise so bewegt werden, daß sich die Farbpunkte in Längsrichtung des Behälters aneinanderreihen.4. The method according to claim 1, characterized in that the container is driven to rotate about its longitudinal axis and the spray nozzles to the longitudinal axis of the container are gradually moved so that the color dots line up in the longitudinal direction of the container. 5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Behälter um ihre Längsachse rotierend angetrieben und die Spritzdüsen linear parallel zur Längsachse der Behälter so bewegt werden, daß die Steigung der von den Farbpunkten der Düsen erzeugten Schraubenlinie der Breite der Schraubenlinie entspricht.5. The method according to any one of claims 1 to 3, characterized in that the container is driven to rotate about its longitudinal axis and the spray nozzles are moved linearly parallel to the longitudinal axis of the container so that the slope of the helix generated by the color points of the nozzles the width of the helix corresponds. 6. Verfahren nach einem der Ansprüche 1 bis 5, d a - durch gekennzeichnet, daß der Abstand der Spritzdüsen zu dem ihnen jeweils gegenüberliegenden Bereich der Behälteroberfläche konstant gehalten wird.6. The method according to any one of claims 1 to 5, d a - characterized in that the distance of the spray nozzles to the opposite region of the container surface is kept constant. 7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß eine Druckvorlage optisch abgetastet und in Bildpunkte unter Erfassung der örtlichen und farblichen Koordinaten unterteilt wird, daß die den Bildpunkten zugeordneten Koordinaten in digitale Daten umgewandelt und der Programmsteuerung für die Spritzdüsen zur Erzeugung des Druckbildes zugeleitet werden.7. The method according to any one of claims 1 to 6, characterized in that a printing template is optically scanned and divided into pixels with detection of local and color coordinates, that the coordinates assigned to the pixels are converted into digital data and the program control for the spray nozzles for generation of the printed image. 8. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 7, gekennzeichnet durch eine die Behälter (1) einzeln aufnehmende Halteeinrichtung (2,2a), welche an den Behältern außerhalb ihrer zu bedruckenden Außenoberflächen angreift, eine Antriebseinrichtung (4), um die Behälter in der Halteeinrichtung um ihre Längsachse rotierend anzutreiben, sowie eine im Abstand von dem in der Halteeinrichtung befindlichen Behälter vorgesehene, parallel zur Behälterlängsachse schrittweise oder kontinuierlich verfahrbare Schlittenanordnung (6) mit auf den Behälter gerichteten Düsen (10 bis 13).8. Device for performing the method according to one of claims 1 to 7, characterized by a the container (1) individually receiving holding device (2,2a) which acts on the containers outside of their outer surfaces to be printed, a drive device (4) to to drive the containers in the holding device rotating about their longitudinal axis, as well as a carriage arrangement (6), which is provided at a distance from the container in the holding device and can be moved stepwise or continuously parallel to the longitudinal axis of the container, with nozzles (10 to 13) directed onto the container. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Halteeinrichtung (2,2a) sowie die Antriebseinrichtung (4 bzw. 8) für die Behälter (1) und die verfahrbare Schlittenanordnung (6) nach Art eines Supports ausgebildet sind.9. The device according to claim 8, characterized in that the holding device (2,2a) and the drive device (4 or 8) for the container (1) and the movable carriage arrangement (6) are designed in the manner of a support. 10. Vorrichtung nach den Ansprüchen 8 oder 9, dadurch gekennzeichnet, daß die Schlittenanordnung (6) einen im Querschnitt C- oder U-förmigen, den zu bedruckenden Behälter (1) umgreifenden Träger (9) für die auf die Behälteroberfläche gerichteten Düsen (10 bis 13) aufweist.10. Device according to claims 8 or 9, characterized in that the carriage arrangement (6) a cross-sectionally C-shaped or U-shaped, the container to be printed (1) encompassing carrier (9) for the nozzles directed onto the container surface (10th to 13). 11. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß die Schlittenanordnung (6) einen Kreuzschlitten mit einer Halteeinrichtung für die Düsen zum Verfahren der Düsen in Längs- und Querrichtung des Behälters aufweist.11. Device according to one of claims 8 to 10, characterized in that the carriage arrangement (6) has a cross slide with a holding device for the nozzles for moving the nozzles in the longitudinal and transverse directions of the container. 12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß ein Sensor zur Messung des Abstandes der Düsen (10 bis 13) von dem Behälter (1) in Strahlrichtung vorgesehen und mit einer Regel- und Antriebseinrichtung zur Verstellung der Düsen in Richtung auf den Behälter oder von ihm weg vorgesehen ist.12. The apparatus according to claim 11, characterized in that a sensor for measuring the distance of the nozzles (10 to 13) from the container (1) is provided in the jet direction and with a control and drive device for adjusting the nozzles in the direction of the container or away from it is provided.
EP86110123A 1985-07-26 1986-07-23 Method and apparatus for decorating metal or plastic containers Expired - Lifetime EP0209896B1 (en)

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AT86110123T ATE50167T1 (en) 1985-07-26 1986-07-23 METHOD AND DEVICE FOR DECORATING METAL OR PLASTIC CONTAINERS.

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DE3526769 1985-07-26
DE19853526769 DE3526769A1 (en) 1985-07-26 1985-07-26 METHOD FOR DECORATING METAL OR PLASTIC CONTAINERS

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EP0209896A2 true EP0209896A2 (en) 1987-01-28
EP0209896A3 EP0209896A3 (en) 1987-07-22
EP0209896B1 EP0209896B1 (en) 1990-02-07

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JP (1) JPS6227170A (en)
AT (1) ATE50167T1 (en)
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DE (2) DE3526769A1 (en)
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ES (1) ES2000753A6 (en)

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JPS6227170A (en) 1987-02-05
EP0209896B1 (en) 1990-02-07
ATE50167T1 (en) 1990-02-15
DK330286D0 (en) 1986-07-11
DE3668799D1 (en) 1990-03-15
DK330286A (en) 1987-01-27
EP0209896A3 (en) 1987-07-22
CA1277176C (en) 1990-12-04
DE3526769A1 (en) 1987-01-29
ES2000753A6 (en) 1988-03-16

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