EP2145767A1 - Device for imprinting the peripheral area of cylindrical workpieces - Google Patents

Device for imprinting the peripheral area of cylindrical workpieces Download PDF

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Publication number
EP2145767A1
EP2145767A1 EP09156933A EP09156933A EP2145767A1 EP 2145767 A1 EP2145767 A1 EP 2145767A1 EP 09156933 A EP09156933 A EP 09156933A EP 09156933 A EP09156933 A EP 09156933A EP 2145767 A1 EP2145767 A1 EP 2145767A1
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EP
European Patent Office
Prior art keywords
roller
workpieces
workpiece
station
printing
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Granted
Application number
EP09156933A
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German (de)
French (fr)
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EP2145767B1 (en
Inventor
Wilfried Philipp
Oliver Nitschke
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Tampoprint GmbH
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Tampoprint GmbH
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Publication of EP2145767A1 publication Critical patent/EP2145767A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/001—Pad printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/08—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces
    • B41F17/14—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length
    • B41F17/20—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length on articles of uniform cross-section, e.g. pencils, rulers, resistors
    • B41F17/22—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length on articles of uniform cross-section, e.g. pencils, rulers, resistors by rolling contact

Definitions

  • the invention relates to a device for printing on the peripheral surface of cylindrical workpieces.
  • Such a printing device is known, this printing device having a transport roller having at its periphery gripping devices for cylindrical workpieces, so that the workpieces can be passed by means of the transport device at a printing station.
  • the disadvantage is that the workpieces must be individually inserted into the gripping devices.
  • From the US-B-6,220,154 Such a printing device is also known, in which the cylindrical workpieces are gripped at their end faces, so that they can be printed over their circumference. In such a device, there is always the risk that the workpieces are not coaxial, that is, are used eccentrically and therefore do not rotate around, which leads to misprints.
  • the invention is therefore based on the object to provide a device with which effectively cylindrical workpieces on its peripheral surface, that is with which of the Coat cylindrical workpieces can be printed easily and quickly.
  • the apparatus comprises a workpiece feeder and a cliché roller associated with an inking station, a doctoring station and a printing station, the printing station having a tampon roller transferring the ink from the cliché roller to the workpieces.
  • the device according to the invention is used in particular for printing on bottle caps, in particular of plastic bottle caps, which increasingly replace the cork.
  • bottle caps wear on their circumference imprint, on the one hand from necessary data, such as manufacturers or bottlers, on the other from advertising.
  • These bottle caps are supplied by means of a feeding device to a printing station, in which the peripheral surface is printed.
  • the ink is removed by means of a Farbgeberwalze a color pool and transferred to a plate roller.
  • the cliché roller is doctored off by means of a doctor blade and the printing ink in the recesses of the engraving is dug out by means of the tampon roller and transferred to the peripheral surface of the workpieces.
  • the workpieces themselves are fed via a feeder and are coaxial with the pad roller, which rolls on the circumference of the workpieces.
  • This device has the significant advantage that it operates without clocking because the workpieces are printed without beginning and end. Therefore, the printed image on the plate roller and thus on the pad roller exactly matched to the circumference of the workpieces. The workpieces rest on the circumference of the pad roller over the length of one revolution of the workpiece.
  • the delivery device is followed by a separating device.
  • this separating device the workpieces located in a memory are singulated, that is supplied to the printing station at a distance from each other. This has the significant advantage that one and the same print image is only transferred to a workpiece and does not overlap several workpieces.
  • the separating device has a separating wheel, which carries on the circumference at least one driver for a workpiece and on the rotational speed of the distance of the separated workpieces is adjustable.
  • the distance between the separated workpieces can be sensitively adjusted to the circumference of the workpieces, in such a way that the distance of the longitudinal axes of the separated workpieces (ie not the clear distance) essentially corresponds to the circumference of the workpieces.
  • the cliché roller can now in Substantially be produced with the engravings for the printed image.
  • a guide and guide device is provided, on which the workpieces rest after singulation with their edge region of the jacket.
  • the guide and guide device presses the workpieces to the pad roller, so that the workpieces are transported out after leaving the separating device, that is, can not move freely. In this way, the distance between the workpieces produced by the separating device is ensured and maintained. Since the workpieces touch the guide and guide device on its circumference, but only in the edge region, this does not interfere with the pressure. This edge area is exempt from pressure.
  • a minimal deformation of the workpieces during the printing is achieved in that the guide and guide device has a distance from the pad roller, which corresponds substantially to the diameter of a workpiece. This not only ensures safe transport during printing, but also ensures that the printed image does not deform.
  • a preferred embodiment provides that the guiding and guiding device is formed by two plates arranged parallel to one another, the distance of which is slightly smaller, as the length of the workpiece so that the workpiece can roll on the sheet metal edges.
  • the sheets have a thickness which is just sufficient to safely guide the workpieces without damaging the workpieces in their edge region. By changing the distance of the sheets, the device can be adjusted to different lengths of workpieces.
  • a development of the invention provides that the cliché roller is divided in the axial direction.
  • the cliché roller parts or sections in each case one the roller parts radially superior cutting disc can be provided.
  • the cliché roller parts may be at a distance from one another, wherein the separating discs are provided within these distances.
  • the cutting discs abut directly on the cliché roll parts.
  • the plate roller i. then the plate roller part can be dyed with different printing inks, with each plate roller part being dyed with a different printing ink.
  • Each cliché roller part is associated with a separate doctor blade of the doctoring station.
  • workpieces can be printed by the pad printing process with up to ten different inks in a parallel arrangement.
  • the individual printing inks can be supplied to the doctoring chambers automatically, but they can also be guided in a circuit, with a filter system can be interposed, so that impurities that are introduced into the ink, can be filtered out.
  • the inking station, the cliché roller and the pad roller together with the guide and guide device are either adjustable or the components easily replaceable, so that the entire printing device is adaptable to workpieces with different diameters and / or lengths.
  • the rollers can be attached to waves, the waves are unilaterally accessible.
  • the workpieces can have a diameter of 1 mm to 100 mm.
  • the cliché roller may be made of ceramic or metal, in particular hardened steel.
  • the engraving depths can be between 2 ⁇ m and 80 ⁇ m.
  • the cliché roller may also be provided with different raster engravings and / or line engravings.
  • the doctor blades are individually interchangeable in the doctoring station attached. It may also be provided a single doctor blade for all cliché roll parts.
  • the tampon roller may have different Shore hardnesses and may consist of plastic, in particular silicone rubber.
  • the tampon roller can also be segmented, that is to say constructed of tampon roller parts or sections lying one behind the other in the axial direction.
  • the FIG. 1 shows a generally designated 10 printing device for printing on workpieces 12, in particular of bottle caps 14.
  • the printing device 10 has a feeding device 16, in which the workpieces 12 are aligned axially parallel to each other and arranged one behind the other.
  • the feeding device 16 is adjoined by a separating device 18, which receives the respective foremost workpiece 12 and supplies it to a guiding and guiding device 20.
  • This guide and guide device 20 is associated with a pad roller 22 which rotates in the direction of the arrow 24.
  • FIG. 1 also shows an inking station 26 in which a cliché roller 28 is inked with ink.
  • a Farbgeberwalze 30 At this cliché roller 28 is a Farbgeberwalze 30 and a doctor blade 32 a doctoring station 34 at.
  • a guard 36 Above the cliché roller 28 and the pad roller 22 is still a guard 36, which prevents engagement between the two rollers 22 and 28.
  • a printing medium for example, a printing ink, a primer, an adhesive or the like.
  • This printing medium is lifted by means of the ink fountain roller 30, which dips into the ink fountain 38 and in the printing medium, and transferred to the circumference of the plate roller 28, which rotates in the direction of the arrow 40.
  • This print medium is made of eg silicone existing tampon roller 22, which rotates in opposite directions and rolls on the plate roller 28, excavated and transported in the direction of the workpieces 12.
  • This separating device 18 has a separating wheel 42, which rotates in the direction of the arrow 44.
  • the separating wheel 42 has on its circumference three staggered by 120 ° each driver 46, which tap the respective foremost workpiece 12 and along a guide rail 48, on which the workpiece 12 rolls and which holds the workpiece 12 in the driver 46, in the direction of the Transport pad roller 22.
  • the guideway 48 is formed by two substantially part-circular plates 56.
  • the workpieces 12 are transferred to the guiding and guiding device 20 where, after leaving the separating wheel 42, they come to rest between the guiding and guiding device 20 and the tampon roller 22.
  • the workpieces 12 are thus transported guided, that is, they always have a defined position along their transport path.
  • the workpiece 12 touches the tampon roller 22, the workpiece 12 rotates in the direction of the arrow 50 and is printed on its circumferential surface 52 by the tampon roller 22. After one complete revolution, the workpiece 12 lifts off from the pad roller 22 and falls into a (not illustrated) collecting container.
  • the workpiece 12 is transported along the arrow 54.
  • the between the guide and guide means 20 and the pad roller 22 located workpieces 12 have a mutual distance, that is, the longitudinal axes of the workpieces 12 are so far apart that this distance corresponds at least to the circumference of a workpiece 12.
  • the guide and guide means 20 is formed of two sheets 56 which are aligned parallel to each other and arranged at a distance from each other which is smaller than the length of a workpiece 12. However, the distance between the two sheets 56 is so large that the workpieces 12 rest in their edge region on the edges of the sheets 56.
  • any residual printing medium remaining on the pad roller 22 is removed with a residual ink pickup 58.
  • the residual paint pickup 58 can remove any trapped dirt.
  • the ink tray 38 which in the FIG. 1 is shown undivided, several juxtaposed color chambers for have different inks, wherein both the ink fountain roller 30 and the plate roller 28 is divided in the direction of its longitudinal axis into a plurality of roller parts, and wherein each roller part is colored with a different printing ink. Carryover of the ink to the other part of the roller is prevented by separating discs provided between the parts of the roller.
  • the tampon roller 22 may be constructed in several parts in the direction of its longitudinal axis, but it may also be designed as a one-piece pad roller 22.
  • cylindrical workpieces 12 can be printed quickly in the pad printing process, with 100,000 printing operations per hour are possible.
  • This print can be one or more colors.
  • the individual rollers are characterized in that the waves are unilaterally accessible, easily replaceable, so that maintenance and / or repair work can be performed quickly.
  • the printing device 10 according to the invention can be quickly converted to workpieces 12 with different diameters and / or other lengths by corresponding rollers are attached.

Landscapes

  • Printing Methods (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacturing Of Printed Circuit Boards (AREA)

Abstract

The device (10) has a feed device (16) arranged downstream to a separation device (18) for a cylindrical workpiece (12) i.e. plastic bottle closure (14). The feed device and a cliche roller (28) are associated with an inking station (26), a doctoring station (34) and a printing station. The printing station includes a pad roller (22), which transfers printing ink from the cliche roller to the workpiece. The separation device includes a separation wheel, which carries a drive for the workpiece. A distance of the separated workpiece is adjustable over a rotational speed of the wheel.

Description

Die Erfindung betrifft eine Vorrichtung zum Bedrucken der Umfangsfläche von zylindrischen Werkstücken.The invention relates to a device for printing on the peripheral surface of cylindrical workpieces.

Aus der FR-A-2,312,373 ist eine derartige Druckvorrichtung bekannt, wobei diese Druckvorrichtung eine Transportwalze aufweist, die an ihrem Umfang Greifvorrichtungen für zylindrische Werkstücke besitzt, so dass die Werkstücke mittels der Transportvorrichtung an einer Druckstation vorbeigeführt werden können. Von Nachteil ist, dass die Werkstücke einzeln in die Greifvorrichtungen eingelegt werden müssen. Aus der US-B-6,220,154 ist ebenfalls eine derartige Druckvorrichtung bekannt, bei der die zylindrischen Werkstücke an ihren Stirnseiten ergriffen werden, so dass sie über ihren Umfang bedruckt werden können. Bei einer derartigen Vorrichtung besteht immer die Gefahr, dass die Werkstücke nicht koaxial, das heißt exzentrisch gegriffen werden und deshalb nicht rund umlaufen, was zu Fehldrucken führt.From the FR-A-2,312,373 Such a printing device is known, this printing device having a transport roller having at its periphery gripping devices for cylindrical workpieces, so that the workpieces can be passed by means of the transport device at a printing station. The disadvantage is that the workpieces must be individually inserted into the gripping devices. From the US-B-6,220,154 Such a printing device is also known, in which the cylindrical workpieces are gripped at their end faces, so that they can be printed over their circumference. In such a device, there is always the risk that the workpieces are not coaxial, that is, are used eccentrically and therefore do not rotate around, which leads to misprints.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung bereitzustellen, mit welcher effektiv zylindrische Werkstücke an ihrer Umfangsfläche, das heißt mit welcher der Mantel zylindrischer Werkstücke auf einfache und schnelle Weise bedruckt werden können.The invention is therefore based on the object to provide a device with which effectively cylindrical workpieces on its peripheral surface, that is with which of the Coat cylindrical workpieces can be printed easily and quickly.

Diese Aufgabe wird erfindungsgemäß mit einer Vorrichtung gelöst, mit der die Umfangsfläche von zylindrischen Werkstücken, insbesondere von Flaschenverschlüssen, mittels eines Tampondruckverfahrens bedruckt werden. Die Vorrichtung weist eine Zuführvorrichtung für die Werkstücke und eine Klischeewalze auf, der eine Einfärbestation, eine Rakelstation und eine Druckstation zugeordnet sind, wobei die Druckstation eine die Druckfarbe von der Klischeewalze auf die Werkstücke übertragende Tamponwalze aufweist.This object is achieved with a device with which the peripheral surface of cylindrical workpieces, in particular bottle caps, are printed by means of a pad printing process. The apparatus comprises a workpiece feeder and a cliché roller associated with an inking station, a doctoring station and a printing station, the printing station having a tampon roller transferring the ink from the cliché roller to the workpieces.

Die erfindungsgemäße Vorrichtung dient insbesondere zum Bedrucken von Flaschenverschlüssen, insbesondere von aus Kunststoff bestehenden Flaschenverschlüssen, welche immer mehr den Kork ablösen. Diese Flaschenverschlüsse tragen an ihrem Umfang einen Aufdruck, der zum einen aus notwendigen Daten, wie z.B. Hersteller- oder Abfüllbetrieb, zum anderen aus Werbung besteht. Diese Flaschenverschlüsse werden mittels einer Zuführvorrichtung einer Druckstation zugeführt, in welcher die Umfangsfläche bedruckt wird. Dabei wird die Druckfarbe mittels einer Farbgeberwalze einem Farbbecken entnommen und auf eine Klischeewalze übertragen. Die Klischeewalze wird mittels einem Rakelmesser abgerakelt und die in den Vertiefungen der Gravur sich befindende Druckfarbe wird mittels der Tamponwalze ausgehoben und auf die Umfangsfläche der Werkstücke übertragen. Die Werkstücke selbst werden über eine Zuführvorrichtung zugeführt und liegen koaxial zur Tamponwalze, die am Umfang der Werkstücke abrollt. Diese Vorrichtung besitzt den wesentlichen Vorteil, dass sie ungetaktet arbeitet, da die Werkstücke ohne Anfang und Ende bedruckt werden. Daher ist das Druckbild auf der Klischeewalze und somit auf der Tamponwalze exakt auf den Umfang der Werkstücke abgestimmt. Die Werkstücke liegen über die Länge einer Umdrehung des Werkstücks am Umfang der Tamponwalze an.The device according to the invention is used in particular for printing on bottle caps, in particular of plastic bottle caps, which increasingly replace the cork. These bottle caps wear on their circumference imprint, on the one hand from necessary data, such as manufacturers or bottlers, on the other from advertising. These bottle caps are supplied by means of a feeding device to a printing station, in which the peripheral surface is printed. The ink is removed by means of a Farbgeberwalze a color pool and transferred to a plate roller. The cliché roller is doctored off by means of a doctor blade and the printing ink in the recesses of the engraving is dug out by means of the tampon roller and transferred to the peripheral surface of the workpieces. The workpieces themselves are fed via a feeder and are coaxial with the pad roller, which rolls on the circumference of the workpieces. This device has the significant advantage that it operates without clocking because the workpieces are printed without beginning and end. Therefore, the printed image on the plate roller and thus on the pad roller exactly matched to the circumference of the workpieces. The workpieces rest on the circumference of the pad roller over the length of one revolution of the workpiece.

Bei einer Weiterbildung ist vorgesehen, dass der Zuführvorrichtung eine Vereinzelungsvorrichtung nachgeschaltet ist. Mittels dieser Vereinzelungsvorrichtung werden die in einem Speicher sich befindenden Werkstücke vereinzelt, das heißt mit Abstand zueinander der Druckstation zugeführt. Dies hat den wesentlichen Vorteil, dass ein und dasselbe Druckbild lediglich auf ein Werkstück übertragen wird und nicht mehrere Werkstücke überlappt.In a further development it is provided that the delivery device is followed by a separating device. By means of this separating device, the workpieces located in a memory are singulated, that is supplied to the printing station at a distance from each other. This has the significant advantage that one and the same print image is only transferred to a workpiece and does not overlap several workpieces.

Bei einer besonders bevorzugten Ausführungsform weist die Vereinzelungsvorrichtung ein Vereinzelungsrad auf, das am Umfang wenigstens einen Mitnehmer für ein Werkstück trägt und über dessen Umlaufgeschwindigkeit der Abstand der vereinzelten Werkstücke einstellbar ist. Auf diese Weise kann feinfühlig der Abstand der vereinzelten Werkstücke exakt auf den Umfang der Werkstücke abgestimmt werden, und zwar so, dass der Abstand der Längsachsen der vereinzelten Werkstücke (also nicht der lichte Abstand) im Wesentlichen dem Umfang der Werkstücke entspricht. Die Klischeewalze kann nunmehr im Wesentlichen lückenlos mit den Gravuren für das Druckbild hergestellt werden.In a particularly preferred embodiment, the separating device has a separating wheel, which carries on the circumference at least one driver for a workpiece and on the rotational speed of the distance of the separated workpieces is adjustable. In this way, the distance between the separated workpieces can be sensitively adjusted to the circumference of the workpieces, in such a way that the distance of the longitudinal axes of the separated workpieces (ie not the clear distance) essentially corresponds to the circumference of the workpieces. The cliché roller can now in Substantially be produced with the engravings for the printed image.

Bei einer Weiterbildung der Erfindung ist eine Leit- und Führungseinrichtung vorgesehen, auf welcher die Werkstücke nach der Vereinzelung mit ihrem Randbereich des Mantels aufliegen. Die Leit- und Führungseinrichtung presst die Werkstücke an die Tamponwalze an, so dass die Werkstücke nach Verlassen der Vereinzelungsvorrichtung geführt transportiert werden, das heißt sich nicht mehr frei bewegen können. Auf diese Weise wird der durch die Vereinzelungsvorrichtung hergestellte Abstand zwischen den Werkstücken sichergestellt und beibehalten. Da die Werkstücke die Leit- und Führungseinrichtung zwar an ihrem Umfang, jedoch lediglich im Randbereich berühren, wirkt sich dies nicht störend für den Druck aus. Dieser Randbereich ist vom Druck ausgenommen.In a further development of the invention, a guide and guide device is provided, on which the workpieces rest after singulation with their edge region of the jacket. The guide and guide device presses the workpieces to the pad roller, so that the workpieces are transported out after leaving the separating device, that is, can not move freely. In this way, the distance between the workpieces produced by the separating device is ensured and maintained. Since the workpieces touch the guide and guide device on its circumference, but only in the edge region, this does not interfere with the pressure. This edge area is exempt from pressure.

Eine minimale Verformung der Werkstücke während des Drucks wird dadurch erreicht, dass die Leit- und Führungsvorrichtung einen Abstand zur Tamponwalze aufweist, der im Wesentlichen dem Durchmesser eines Werkstücks entspricht. Hierdurch wird nicht nur ein sicherer Transport während des Drucks erreicht, sondern es wird auch sichergestellt, dass sich das Druckbild nicht verformt.A minimal deformation of the workpieces during the printing is achieved in that the guide and guide device has a distance from the pad roller, which corresponds substantially to the diameter of a workpiece. This not only ensures safe transport during printing, but also ensures that the printed image does not deform.

Eine bevorzugte Ausführungsform sieht vor, dass die Leit- und Führungsvorrichtung von zwei parallel zueinander angeordneten Blechen gebildet wird, deren Abstand geringfügig geringer ist, als die Länge des Werkstücks, so dass das Werkstück auf den Blechrändern abrollen können. Die Bleche besitzen eine Dicke, die gerade noch ausreicht, um die Werkstücke sicher zu führen, ohne dass die Werkstücke in ihrem Randbereich beschädigt werden. Durch eine Änderung des Abstands der Bleche kann die Vorrichtung auf unterschiedlich lange Werkstücke eingestellt werden.A preferred embodiment provides that the guiding and guiding device is formed by two plates arranged parallel to one another, the distance of which is slightly smaller, as the length of the workpiece so that the workpiece can roll on the sheet metal edges. The sheets have a thickness which is just sufficient to safely guide the workpieces without damaging the workpieces in their edge region. By changing the distance of the sheets, the device can be adjusted to different lengths of workpieces.

Eine Weiterbildung der Erfindung sieht vor, dass die Klischeewalze in axialer Richtung geteilt ist. Dabei kann zwischen den Klischeewalzenteilen oder -abschnitten jeweils eine die Walzenteile radial überragende Trennscheibe vorgesehen sein. Die Klischeewalzenteile können einen Abstand zueinander aufweisen, wobei innerhalb dieser Abstände die Trennscheiben vorgesehen sind. Es besteht auch die Möglichkeit, dass die Trennscheiben direkt an den Klischeewalzenteilen anliegen.A development of the invention provides that the cliché roller is divided in the axial direction. In this case, between the cliché roller parts or sections in each case one the roller parts radially superior cutting disc can be provided. The cliché roller parts may be at a distance from one another, wherein the separating discs are provided within these distances. There is also the possibility that the cutting discs abut directly on the cliché roll parts.

Weist die Einfärbestation für jeden Klischeewalzenteil eine separate Farbkammer auf, dann kann die Klischeewalze, d.h. dann können die Klischeewalzenteil mit verschiedenen Druckfarben eingefärbt werden, wobei jeder Klischeewalzenteil mit einer anderen Druckfarbe eingefärbt wird. Jedem Klischeewalzenteil ist ein separates Rakelmesser der Rakelstation zugeordnet.If the inking station has a separate ink chamber for each plate roller part, then the plate roller, i. then the plate roller part can be dyed with different printing inks, with each plate roller part being dyed with a different printing ink. Each cliché roller part is associated with a separate doctor blade of the doctoring station.

Um die Druckbilder exakt auf den Werkstücken ausrichten zu können, ist/sind die Tamponwalze und/oder ist die Klischeewalze und/oder die Einfärbestation in Querrichtung verschiebbar gelagert.In order to align the print images exactly on the workpieces, is / are the tampon roller and / or is the Cliché roll and / or the inking station mounted displaceably in the transverse direction.

Mit der erfindungsgemäßen Vorrichtung können Werkstücke nach dem Tampondruckverfahren mit bis zu zehn unterschiedliche Druckfarben in paralleler Anordnung bedruckt werden. Die einzelnen Druckfarben können den Rakelkammern automatisch zugeführt werden, sie können aber auch in einem Kreislauf geführt werden, wobei ein Filtersystem zwischengeschaltet sein kann, so dass Verunreinigungen, welche in die Druckfarbe eingeschleppt werden, ausgefiltert werden können. Die Einfärbestation, die Klischeewalze und die Tamponwalze zusammen mit der Leit- und Führungseinrichtung, sind entweder verstellbar oder die Bauteile leicht austauschbar, so dass die gesamte Druckvorrichtung an Werkstücke mit unterschiedlichen Durchmessern und/oder Längen anpassbar ist. Dabei können die Walzen auf Wellen aufgesteckt sein, wobei die Wellen einseitig zugänglich sind. Die Werkstücke können einen Durchmesser von 1 mm bis 100 mm besitzen. Dabei können Druckfarben verwendet werden, die UV-aushärtend, wasserbasiert, lösungsmittelfrei oder mit Lösungsmittel versetzt sind. Es können anstelle von Druckfarben aber auch Primer, Kleber oder sonstige Medien übertragen werden. Die Klischeewalze kann aus Keramik oder Metall, insbesondere aus gehärtetem Stahl, bestehen. Die Gravurtiefen können zwischen 2 µm und 80 µm liegen. Die Klischeewalze kann außerdem mit unterschiedlichen Rastergravuren und/oder Strichgravuren versehen sein. Die Rakelmesser sind einzeln auswechselbar in der Rakelstation befestigt. Es kann auch ein einzelnes Rakelmesser für alle Klischeewalzenteile vorgesehen sein. Dabei kann die Tamponwalze unterschiedliche Shorehärten aufweisen und sie kann aus Kunststoff, insbesondere Silikonkautschuk bestehen. Die Tamponwalze kann außerdem segmentiert sein, das heißt aus Tamponwalzenteilen oder -abschnitten, die in Achsrichtung hintereinander liegen, aufgebaut sein.With the device according to the invention workpieces can be printed by the pad printing process with up to ten different inks in a parallel arrangement. The individual printing inks can be supplied to the doctoring chambers automatically, but they can also be guided in a circuit, with a filter system can be interposed, so that impurities that are introduced into the ink, can be filtered out. The inking station, the cliché roller and the pad roller together with the guide and guide device are either adjustable or the components easily replaceable, so that the entire printing device is adaptable to workpieces with different diameters and / or lengths. The rollers can be attached to waves, the waves are unilaterally accessible. The workpieces can have a diameter of 1 mm to 100 mm. It can be used inks that are UV-curing, water-based, solvent-free or mixed with solvents. Instead of printing inks it is also possible to transfer primers, adhesives or other media. The cliché roller may be made of ceramic or metal, in particular hardened steel. The engraving depths can be between 2 μm and 80 μm. The cliché roller may also be provided with different raster engravings and / or line engravings. The doctor blades are individually interchangeable in the doctoring station attached. It may also be provided a single doctor blade for all cliché roll parts. In this case, the tampon roller may have different Shore hardnesses and may consist of plastic, in particular silicone rubber. The tampon roller can also be segmented, that is to say constructed of tampon roller parts or sections lying one behind the other in the axial direction.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein besonders bevorzugtes Ausführungsbeispiel im Einzelnen beschrieben ist. Dabei können die in der Zeichnung dargestellten sowie in der Beschreibung und in den Ansprüchen erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details of the invention will become apparent from the subclaims and the following description in which, with reference to the drawing, a particularly preferred embodiment is described in detail. The features shown in the drawing and mentioned in the description and in the claims may each be essential to the invention individually or in any combination.

In der Zeichnung zeigen:

Figur 1
eine perspektivische Ansicht einer bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung; und
Figur 2
eine Seitenansicht in Richtung des Pfeils II gemäß Figur 1.
In the drawing show:
FIG. 1
a perspective view of a preferred embodiment of the device according to the invention; and
FIG. 2
a side view in the direction of arrow II according to FIG. 1 ,

Die Figur 1 zeigt eine insgesamt mit 10 bezeichnete Druckvorrichtung zum Bedrucken von Werkstücken 12, insbesondere von Flaschenverschlüssen 14. Die Druckvorrichtung 10 besitzt eine Zuführvorrichtung 16, in welcher die Werkstücke 12 achsparallel zueinander ausgerichtet und hintereinander angeordnet sind. An die Zuführvorrichtung 16 schließt sich eine Vereinzelungsvorrichtung 18 an, welche das jeweils vorderste Werkstück 12 aufnimmt und einer Leit- und Führungseinrichtung 20 zuführt. Dieser Leit- und Führungseinrichtung 20 ist eine Tamponwalze 22 zugeordnet, die sich in Richtung des Pfeils 24 dreht.The FIG. 1 shows a generally designated 10 printing device for printing on workpieces 12, in particular of bottle caps 14. The printing device 10 has a feeding device 16, in which the workpieces 12 are aligned axially parallel to each other and arranged one behind the other. The feeding device 16 is adjoined by a separating device 18, which receives the respective foremost workpiece 12 and supplies it to a guiding and guiding device 20. This guide and guide device 20 is associated with a pad roller 22 which rotates in the direction of the arrow 24.

Die Figur 1 zeigt außerdem eine Einfärbestation 26, in welcher eine Klischeewalze 28 mit Druckfarbe eingefärbt wird. An dieser Klischeewalze 28 liegt eine Farbgeberwalze 30 sowie ein Rakelmesser 32 einer Rakelstation 34 an. Oberhalb der Klischeewalze 28 und der Tamponwalze 22 befindet sich noch ein Schutz 36, der ein Eingreifen zwischen die beiden Walzen 22 und 28 verhindert.The FIG. 1 also shows an inking station 26 in which a cliché roller 28 is inked with ink. At this cliché roller 28 is a Farbgeberwalze 30 and a doctor blade 32 a doctoring station 34 at. Above the cliché roller 28 and the pad roller 22 is still a guard 36, which prevents engagement between the two rollers 22 and 28.

Anhand der Figur 2 wird der Druckvorgang beschrieben. In einer Farbwanne 38 befindet sich ein Druckmedium, zum Beispiel eine Druckfarbe, ein Primer, ein Kleber oder dergleichen. Dieses Druckmedium wird mittels der Farbgeberwalze 30, welche in die Farbwanne 38 und in das Druckmedium eintaucht, ausgehoben, und auf den Umfang der Klischeewalze 28 übertragen, die in Richtung des Pfeils 40 umläuft. Mittels des Rakelmessers 32 wird überschüssiges Druckmedium vom Umfang der Klischeewalze 28 abgerakelt, so dass lediglich in der Gravur Druckmedium verbleibt. Dieses Druckmedium wird von der z.B. aus Silikon bestehenden Tamponwalze 22, welche gegensinnig umläuft und an der Klischeewalze 28 abrollt, ausgehoben und in Richtung der Werkstücke 12 transportiert.Based on FIG. 2 the printing process is described. In a paint tray 38 is a printing medium, for example, a printing ink, a primer, an adhesive or the like. This printing medium is lifted by means of the ink fountain roller 30, which dips into the ink fountain 38 and in the printing medium, and transferred to the circumference of the plate roller 28, which rotates in the direction of the arrow 40. By means of the doctor blade 32 excess pressure medium from the circumference of the plate roller 28 is scraped off, so that only in the engraving pressure medium remains. This print medium is made of eg silicone existing tampon roller 22, which rotates in opposite directions and rolls on the plate roller 28, excavated and transported in the direction of the workpieces 12.

Diese Werkstücke 12 werden, wie bereits erwähnt, mittels der Vereinzelungsvorrichtung 18 vereinzelt. Diese Vereinzelungsvorrichtung 18 besitzt ein Vereinzelungsrad 42, welches in Richtung des Pfeils 44 umläuft. Das Vereinzelungsrad 42 besitzt an seinem Umfang drei jeweils um 120° versetzt angeordnete Mitnehmer 46, welche das jeweils vorderste Werkstück 12 abgreifen und entlang einer Führungsbahn 48, an welcher das Werkstück 12 abrollt und welche das Werkstück 12 im Mitnehmer 46 hält, in Richtung auf die Tamponwalze 22 transportieren.These workpieces 12 are, as already mentioned, isolated by means of the separating device 18. This separating device 18 has a separating wheel 42, which rotates in the direction of the arrow 44. The separating wheel 42 has on its circumference three staggered by 120 ° each driver 46, which tap the respective foremost workpiece 12 and along a guide rail 48, on which the workpiece 12 rolls and which holds the workpiece 12 in the driver 46, in the direction of the Transport pad roller 22.

Wie aus Figur 1 ersichtlich, wird die Führungsbahn 48 von zwei im Wesentlichen teilkreisförmigen Blechen 56 gebildet. Die Werkstücke 12 werden nach Verlassen der Führungsbahn 48 an die Leit- und Führungseinrichtung 20 übergeben, wo sie nach Verlassen des Vereinzelungsrades 42 zwischen der Leit- und Führungseinrichtung 20 sowie der Tamponwalze 22 zu liegen kommen. Die Werkstücke 12 werden also geführt transportiert, das heißt sie besitzen stets eine definierte Position entlang ihrer Transportbahn. Sobald das Werkstück 12 die Tamponwalze 22 berührt, läuft das Werkstück 12 in Richtung des Pfeils 50 um und wird an seiner Umfangsfläche 52 von der Tamponwalze 22 bedruckt. Nach einem vollständigen Umlauf hebt das Werkstück 12 von der Tamponwalze 22 ab und fällt in einen (nicht dargestellten) Sammelbehälter. Während des Umlaufs wird das Werkstück 12 entlang des Pfeils 54 transportiert. Die zwischen der Leit- und Führungseinrichtung 20 und der Tamponwalze 22 sich befindenden Werkstücke 12 besitzen einen gegenseitigen Abstand, das heißt die Längsachsen der Werkstücke 12 sind so weit voneinander entfernt, dass diese Entfernung mindestens dem Umfang eines Werkstücks 12 entspricht.How out FIG. 1 As can be seen, the guideway 48 is formed by two substantially part-circular plates 56. After leaving the guideway 48, the workpieces 12 are transferred to the guiding and guiding device 20 where, after leaving the separating wheel 42, they come to rest between the guiding and guiding device 20 and the tampon roller 22. The workpieces 12 are thus transported guided, that is, they always have a defined position along their transport path. As soon as the workpiece 12 touches the tampon roller 22, the workpiece 12 rotates in the direction of the arrow 50 and is printed on its circumferential surface 52 by the tampon roller 22. After one complete revolution, the workpiece 12 lifts off from the pad roller 22 and falls into a (not illustrated) collecting container. During the circulation, the workpiece 12 is transported along the arrow 54. The between the guide and guide means 20 and the pad roller 22 located workpieces 12 have a mutual distance, that is, the longitudinal axes of the workpieces 12 are so far apart that this distance corresponds at least to the circumference of a workpiece 12.

Wie insbesondere deutlich aus Figur 1 erkennbar, wird die Leit- und Führungseinrichtung 20 von zwei Blechen 56 gebildet, die parallel zueinander ausgerichtet und in einem Abstand zueinander angeordnet sind, der geringer ist, als die Länge eines Werkstücks 12. Der Abstand der beiden Bleche 56 ist jedoch so groß, dass die Werkstücke 12 in ihrem Randbereich auf den Kanten der Bleche 56 aufliegen.As especially clear FIG. 1 can be seen, the guide and guide means 20 is formed of two sheets 56 which are aligned parallel to each other and arranged at a distance from each other which is smaller than the length of a workpiece 12. However, the distance between the two sheets 56 is so large that the workpieces 12 rest in their edge region on the edges of the sheets 56.

Nach dem Druckvorgang wird eventuell auf der Tamponwalze 22 verbleibendes, restliches Druckmedium mit einer Restfarbenabholung 58 entfernt. Außerdem kann mit der Restfarbenabholung 58 eventuell eingefangener Schmutz entfernt werden.After the printing process, any residual printing medium remaining on the pad roller 22 is removed with a residual ink pickup 58. In addition, the residual paint pickup 58 can remove any trapped dirt.

Mittels eines Antriebs 60 werden die Farbgeberwalze 30 sowie die Klischeewalze 28, die Tamponwalze 22 und die Vereinzelungsvorrichtung 18 angetrieben.By means of a drive 60, the ink fountain roller 30 and the plate roller 28, the pad roller 22 and the separating device 18 are driven.

Die Farbwanne 38, die in der Figur 1 ungeteilt dargestellt ist, kann mehrere nebeneinander angeordnete Farbkammern für unterschiedliche Druckfarben aufweisen, wobei sowohl die Farbgeberwalze 30 als auch die Klischeewalze 28 in Richtung ihrer Längsachse in mehrere Walzenteile aufgeteilt ist, und wobei jeder Walzenteil mit einer anderen Druckfarbe eingefärbt wird. Eine Verschleppung der Druckfarbe auf den anderen Walzenteil wird durch zwischen den Walzenteilen vorgesehene Trennscheiben verhindert. Ebenso kann die Tamponwalze 22 in Richtung ihrer Längsachse mehrteilig aufgebaut sein, sie kann aber auch als einteilige Tamponwalze 22 ausgeführt sein.The ink tray 38, which in the FIG. 1 is shown undivided, several juxtaposed color chambers for have different inks, wherein both the ink fountain roller 30 and the plate roller 28 is divided in the direction of its longitudinal axis into a plurality of roller parts, and wherein each roller part is colored with a different printing ink. Carryover of the ink to the other part of the roller is prevented by separating discs provided between the parts of the roller. Likewise, the tampon roller 22 may be constructed in several parts in the direction of its longitudinal axis, but it may also be designed as a one-piece pad roller 22.

Mit der erfindungsgemäßen Druckvorrichtung können zylindrische Werkstücke 12 schnell im Tampondruckverfahren bedruckt werden, wobei 100.000 Druckvorgänge pro Stunde möglich sind. Dieser Druck kann ein- oder mehrfarbig sein. Außerdem sind die einzelnen Walzen dadurch, dass deren Wellen einseitig zugänglich sind, leicht auswechselbar, so dass Wartungs-und/oder Reparaturarbeiten schnell durchgeführt werden können. Außerdem kann die erfindungsgemäße Druckvorrichtung 10 schnell auf Werkstücke 12 mit anderen Durchmessern und/oder anderen Längen umgerüstet werden, indem entsprechende Walzen aufgesteckt werden.With the printing device according to the invention cylindrical workpieces 12 can be printed quickly in the pad printing process, with 100,000 printing operations per hour are possible. This print can be one or more colors. In addition, the individual rollers are characterized in that the waves are unilaterally accessible, easily replaceable, so that maintenance and / or repair work can be performed quickly. In addition, the printing device 10 according to the invention can be quickly converted to workpieces 12 with different diameters and / or other lengths by corresponding rollers are attached.

Claims (14)

Vorrichtung (10) zum Bedrucken der Umfangsfläche (52) von zylindrischen Werkstücken (12), insbesondere von Flaschenverschlüssen (14), mittels eines indirekten Druckverfahrens, insbesondere eines Tampondruckverfahrens, mit einer Zuführvorrichtung (16) für die Werkstücke (12) und mit einer Klischeewalze (28), der eine Einfärbestation (26), eine Rakelstation (34) und eine Druckstation zugeordnet sind, wobei die Druckstation eine die Druckfarbe von der Klischeewalze (28) auf die Werkstücke (12) übertragende Tamponwalze (22) aufweist.Device (10) for printing the peripheral surface (52) of cylindrical workpieces (12), in particular bottle closures (14), by means of an indirect printing process, in particular a pad printing process, with a feed device (16) for the workpieces (12) and with a cliché roller (28) associated with an inking station (26), a doctoring station (34) and a printing station, the printing station having a pad roller (22) transferring the ink from the cliché roller (28) to the workpieces (12). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Zuführvorrichtung (16) eine Vereinzelungsvorrichtung (18) nachgeschaltet ist.Apparatus according to claim 1, characterized in that the supply device (16) is followed by a separating device (18). Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Vereinzelungsvorrichtung (18) ein Vereinzelungsrad (42) aufweist, das am Umfang wenigstens einen Mitnehmer (46) für ein Werkstück (12) trägt und über dessen Umlaufgeschwindigkeit der Abstand der vereinzelten Werkstücke (12) einstellbar ist.Apparatus according to claim 2, characterized in that the separating device (18) has a separating wheel (42) which carries on the circumference at least one driver (46) for a workpiece (12) and adjustable over the rotational speed of the distance of the individual workpieces (12) is. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Abstand der Längsachsen der vereinzelten Werkstücke (12) im Wesentlichen dem Umfang eines Werkstücks (12) entspricht.Apparatus according to claim 3, characterized in that the distance of the longitudinal axes of the individual workpieces (12) substantially corresponds to the circumference of a workpiece (12). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Leit- und Führungseinrichtung (20) vorgesehen ist, auf welcher die Werkstücke (12) nach der Vereinzelung in ihren Randbereichen aufliegen.Device according to one of the preceding claims, characterized in that a guiding and guiding device (20) is provided on which rest the workpieces (12) after the separation in their edge regions. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Leit- und Führungseinrichtung (20) einen Abstand zur Tamponwalze (22) aufweist, der im Wesentlichen dem Durchmesser des Werkstücks (12) entspricht.Device according to one of the preceding claims, characterized in that the guide and guide device (20) has a distance from the tampon roller (22) which substantially corresponds to the diameter of the workpiece (12). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Leit- und Führungseinrichtung (20) von zwei parallel zueinander angeordneten Blechen (56) gebildet wird, deren Abstand geringfügig geringer ist, als die Länge des Werkstücks (12), so dass das Werkstück (12) auf den Rändern der Bleche (56) abrollen kann.Device according to one of the preceding claims, characterized in that the guide and guide means (20) of two mutually parallel sheets (56) is formed whose distance is slightly less than the length of the workpiece (12), so that the workpiece (12) can roll on the edges of the sheets (56). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Klischeewalze (28) in axialer Richtung geteilt ist.Device according to one of the preceding claims, characterized in that the cliché roller (28) is divided in the axial direction. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass zwischen den Klischeewalzenteilen jeweils eine die Walzenteile radial überragende Trennscheibe vorgesehen ist.Apparatus according to claim 8, characterized in that between the plate roller parts each one of the roller parts radially superior cutting disc is provided. Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Einfärbestation (26) für jeden Walzenteil eine Farbkammer aufweist.Apparatus according to claim 8 or 9, characterized in that the inking station (26) has a paint chamber for each roller part. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass die Farbkammern in einer Farbwanne (38) zusammengefasst sind.Apparatus according to claim 10, characterized in that the color chambers are combined in a color trough (38). Vorrichtung nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass jedem Klischeewalzenteil ein Rakelmesser (32) der Rakelstation (34) zugeordnet ist.Device according to one of claims 8 to 11, characterized in that each doctor blade part is associated with a doctor blade (32) of the doctoring station (34). Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Tamponwalze (22) und/oder die Klischeewalze (28) querverschiebbar gelagert ist.Device according to one of the preceding claims, characterized in that the tampon roller (22) and / or the plate roller (28) is mounted transversely displaceable. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Tamponwalze (22) und/oder die Klischeewalze (28) auf einseitig offenen Wellen gelagert ist/sind.Device according to one of the preceding claims, characterized in that the tampon roller (22) and / or the plate roller (28) is mounted on unilaterally open waves / are.
EP09156933A 2008-07-17 2009-03-31 Device for imprinting the peripheral area of cylindrical workpieces Not-in-force EP2145767B1 (en)

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AT (1) ATE488366T1 (en)
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FR2312373A1 (en) 1975-05-28 1976-12-24 Liege Ste Francaise Continuous stopper printing machine - has rotary disc transporting past flame treatment, printing and unloader units
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ATE488366T1 (en) 2010-12-15
FR2933900A1 (en) 2010-01-22
ITPD20080054U1 (en) 2010-01-18
US20100011977A1 (en) 2010-01-21
DE502009000182D1 (en) 2010-12-30
DE102008034187A1 (en) 2010-01-21
DE202008010384U1 (en) 2008-12-11
EP2145767B1 (en) 2010-11-17
ES1068931Y (en) 2009-04-01
ES2355697T3 (en) 2011-03-30
ES1068931U (en) 2009-01-01

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