EP1963106B1 - Gravure printing-form sleeve and production thereof - Google Patents

Gravure printing-form sleeve and production thereof Download PDF

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Publication number
EP1963106B1
EP1963106B1 EP06806602A EP06806602A EP1963106B1 EP 1963106 B1 EP1963106 B1 EP 1963106B1 EP 06806602 A EP06806602 A EP 06806602A EP 06806602 A EP06806602 A EP 06806602A EP 1963106 B1 EP1963106 B1 EP 1963106B1
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EP
European Patent Office
Prior art keywords
gravure printing
sleeve
printing forme
forme sleeve
gravure
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Not-in-force
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EP06806602A
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German (de)
French (fr)
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EP1963106A1 (en
Inventor
Hartmut Fuhrmann
Mladen Frlan
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Manroland AG
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Manroland AG
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Publication of EP1963106A1 publication Critical patent/EP1963106A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/18—Curved printing formes or printing cylinders
    • B41C1/182—Sleeves; Endless belts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating

Definitions

  • the invention relates to a gravure sleeve and its manufacture.
  • the gravure printing process is a particularly simple process, which is characterized in that the coloring does not first have to reach an equilibrium, as is the case with offset inking systems, but virtually immediately the substrate offers the right amount of ink.
  • the gravure printing With the gravure printing a very high print quality is achieved, and it can be printed on a wide variety of substrates. This advantage is offset by the considerable expense that is required for the production of a gravure form.
  • massive and heavy cylinders with lifting devices must be removed from the printing press when changing the printed image.
  • These gravure cylinders must then be stored or re-supplied to the manufacturing process for gravure forms. In this case, the production of gravure form can also be done in a very different place than the place where the printing press is located.
  • thin-walled nickel sleeves are already being offered which are engraved with an engraved copper layer like conventional gravure printing forms.
  • a cylinder is necessary on which nickel is first deposited up to the desired wall thickness of the sleeve from 0.2 mm to 0.4 mm and then the engraved copper is deposited. Due to a separating layer between the cylinder body and nickel layer, the electrolytically grown nickel can be final be removed from the cylinder as a thin, seamless tube. This method of production is problematic when very often sleeves with different circumferences are required.
  • the production of a gravure printing sleeve thus includes, in the case that a gravure form must be made in a new size not already present, the production of a first cylinder, which receives the print-ready gravure sleeve and is used in the printing press and on this the processing steps How to measure, polish and engrave, can be made, and the galvanic production of the nickel sleeve with subsequent electrodeposition of engraving copper on a second cylinder.
  • a prestructured Tiefticianrohform is filled with a mind.
  • a filling substance for example, a thermoplastic material or a wax, paints or a crosslinkable polymer melt or solution, which is also referred to as a reactive system and which is characterized by an extremely high abrasion resistance can be used.
  • a reactive system which is also referred to as a reactive system and which is characterized by an extremely high abrasion resistance
  • the surface of the gravure form is smooth.
  • the charged substance is removed imagewise from the depressions by thermal energy action of a pixel transfer device.
  • the gravure form can be colored by means of a Einärbesystems, so that can be printed on a substrate in the gravure printing.
  • the filling substance is preferably completely dissolved out of the pre-structured depressions and the wells
  • the filling substance can be released from the pre-structured depressions by means of a heat source and / or blow-out or suction device.
  • images which are smaller than the surface elements of the basic grid of the gravure blank can be addressed by the imagewise ablation, wherein in particular the imagewise ablation can even be carried out essentially independently of the basic grid.
  • the imagewise ablation can also be adapted to the basic grid, i. to be in a certain geometric relation to it. In the ideal case, the image-wise ablation carries out procedurally necessary structuring of the depressions of the basic grid.
  • the use of welded steel sleeves avoids the above-described second cylinder for the galvanic production of a nickel sleeve, in that instead of galvanically deposited nickel sleeves, just welded steel sleeves are used, as described in US Pat DE 44 32 814 A1 are described.
  • Such a steel sleeve with a typical wall thickness of between 0.1 mm to 0.4 mm is manufactured and welded with the desired circumference of thin-walled sheet metal of the desired thickness and can replace the galvanically produced nickel sleeve in the production of intaglio printing.
  • the gravure copper layer required for the intaglio can be applied directly to the welded steel sleeve, with suitable material selection of the welded sleeve or use of suitable intermediate layers.
  • the engraved copper layer also covers the weld seam and again results in a gravure form suitable for continuous printing.
  • the circularity of the easily deformable steel sleeve may be e.g. by circular lids or other geometries defining a circle, e.g. spoke-like rods whose end points lie on a circle, are guaranteed, which can be realized much easier compared to the use of a second cylinder mentioned at the beginning.
  • the handling of the sleeve during copper plating is facilitated by the low masses.
  • the gravure form is constructed by means of a steel carrier sleeve in the form of a sleeve whose initial shape is a rectangular plate piece with a wall thickness between 0.1 mm to 0.4 mm, which is brought by bending in the desired hollow cylindrical shape, and the facing edges of the Plate piece firmly connected to each other, in particular welded and on the outer lateral surface of a engraved copper layer is applied, wherein in the engraved copper layer, a picture grid or a basic grid is incorporated.
  • the basic grid is filled evenly by means of a filling substance and the filling material is removed from the recesses of the basic grid.
  • such a gravure mold is produced in such a way that a thin-walled steel sheet having a wall thickness of between 0.1 mm and 0.4 mm is drawn from a roll, and a support plate is cut to the size and width of the receiving cylinder to be used in the planned state is, the support plate is brought by bending in the desired hollow cylindrical shape and the mutually facing edges of the support plates firmly connected to each other, in particular welded and on the outer surface of the steel support sleeve, a gravure copper layer is electrodeposited.
  • the engraved copper layer is turned to size and polished.
  • Into the engraved copper layer is used to form a gravure form with the known engraving techniques, such as e.g.
  • a basic grid is preferably engraved by means of laser etching engraving, the depressions of the basic grid are filled uniformly by means of a filling substance by an applicator device. Subsequently, the filler material is removed by a pixel transfer device from the wells.
  • the metal sheet used to make the tubular gravure sleeve may also already be used as a composite of a strength property steel sheet and an engraving engraving copper layer available. However, it is preferred that the engraved copper layer is applied to the tubular carrier sleeve in a galvanic process.
  • the applied engraving copper layer completely covers the weld seam of the carrier sleeve, so that the intaglio printing form according to the invention allows the application of 360 ° print images (continuous printing), as e.g. are common in packaging and decor printing.
  • the gravure sleeve can be accommodated by simple, specially made for a certain diameter and thus diameter-resistant sleeves or by diameter-variable within certain limits sleeves, both of which have a standardized internal geometry, which is taken from a same for all formats, universal clamping device (please refer FIG. 1 ).
  • the intaglio printing plate according to the invention has, as described above, a wall thickness of 0.1 mm to 0.5 mm and is pushed onto a dimensionally stable receiving tube with a wall thickness> 5 mm, wherein the outer diameter of the receiving tube is smaller by 0.1 mm to 0.5 mm as the inner diameter of the sleeveförmigen rotogravure mold.
  • the receiving tube has at the periphery with compressed air acted upon openings, so that the pushing of the gravure printing sleeve is supported by the formation of an air cushion between pick-up tube and gravure form.
  • the outer diameter of the receiving tube is adapted to the inner diameter of the gravure printing sleeve so that a frictional connection between the receiving tube and sleeve is made. This is achieved by hydraulically or pneumatically moved circumferential segments or by a caused by hydraulic or pneumatic pressure or thermal expansion elastic material deformation of the circumference of the receiving tube.
  • the inner diameter of the receiving tube is designed to fit a universal clamping device.
  • the universal clamping device simultaneously meets the requirements of the camp for receiving the gravure cylinder in a gravure printing machine and can thus be used together with the carrier sleeve or the receiving tube of the gravure printing sleeve and the gravure sleeve itself as a complete gravure cylinder in the printing press.
  • the gap between the universal clamping device and the receiving tube is sealed against the ingress of ink.

Abstract

The sleeve has a steel girder casing whose initial shape is a rectangular plate piece having a wall thickness between 0.1 millimeters to 0.4 millimeters. The steel girder is brought to desired hollow cylinder form by bending. Edges of the plate piece which are arranged one on another are connected firmly with one another, in particular the edges are welded. An engraving copper layer is applied on external generated surface. An independent claim is also included for a method for production of a gravure printing plate sleeve.

Description

Die Erfindung betrifft einen Tiefdruckform-Sleeve und seine Herstellung.The invention relates to a gravure sleeve and its manufacture.

Das Tiefdruckverfahren ist ein besonders einfaches Verfahren, das sich dadurch auszeichnet, dass die Einfärbung nicht erst ein Gleichgewicht erreichen muss, wie das bei Offset-Einfärbesystemen der Fall ist, sondern praktisch sofort der Bedruckstoff die richtige Farbmenge anbietet. Mit dem Tiefdruck wird eine sehr hohe Druckqualität erreicht, und es können die verschiedensten Bedruckstoffe bedruckt werden. Diesem Vorteil steht der erhebliche Aufwand gegenüber, der für die Herstellung einer Tiefdruckform erforderlich ist. Insbesondere müssen beim Wechseln des Druckbildes massive und schwere Zylinder mit Hebevorrichtungen aus der Druckmaschine entfernt werden. Diese Tiefdruckzylinder müssen dann gelagert oder erneut dem Herstellungsprozess für Tiefdruckformen zugeführt werden. Dabei kann die Herstellung der Tiefdruckform auch an einem ganz anderen Ort erfolgen als dem Ort, an dem sich die Druckmaschine befindet. Zum Herstellaufwand der Tiefdruckform kann also noch ein erheblicher Transportaufwand hinzukommen und selbst wenn die Tiefdruckformherstellung am gleichen Ort erfolgt, an dem die Druckform auch verdruckt wird, so erschwert das hohe Gewicht eines Tiefdruckzylinders den Transport des Tiefdruckzylinders durch die einzelnen für die Herstellung der Tiefdruckform erforderlichen Prozessschritte erheblich.The gravure printing process is a particularly simple process, which is characterized in that the coloring does not first have to reach an equilibrium, as is the case with offset inking systems, but virtually immediately the substrate offers the right amount of ink. With the gravure printing a very high print quality is achieved, and it can be printed on a wide variety of substrates. This advantage is offset by the considerable expense that is required for the production of a gravure form. In particular, massive and heavy cylinders with lifting devices must be removed from the printing press when changing the printed image. These gravure cylinders must then be stored or re-supplied to the manufacturing process for gravure forms. In this case, the production of gravure form can also be done in a very different place than the place where the printing press is located. For the production of the intaglio printing can still be added a significant transport and even if the gravure printing takes place in the same place where the printing form is also printed, so the heavy weight of a gravure cylinder makes it difficult to transport the gravure cylinder by the individual process steps required for the production of intaglio printing considerably.

Zur Lösung des Gewichtsproblems werden bereits dünnwandige Nickelsleeves angeboten, die mit einer Gravurkupferschicht versehen wie herkömmliche Tiefdruckformen graviert werden. Allerdings ist zur Herstellung solcher Nickelsleeves ein Zylinder nötig, auf dem zunächst Nickel bis zu der gewünschten Wandstärke des Sleeves von 0,2 mm bis 0,4 mm abgeschieden wird und anschließend das Gravurkupfer abgeschieden wird. Aufgrund einer Trennschicht zwischen Zylinderkörper und Nickelschicht kann das elektrolytisch aufgewachsene Nickel abschließend vom Zylinder als dünnes, nahtloses Rohr abgezogen werden. Problematisch ist diese Herstellungsmethode dann, wenn sehr oft Sleeves mit unterschiedlichen Umfängen benötigt werden.To solve the weight problem, thin-walled nickel sleeves are already being offered which are engraved with an engraved copper layer like conventional gravure printing forms. However, to manufacture such nickel sleeves, a cylinder is necessary on which nickel is first deposited up to the desired wall thickness of the sleeve from 0.2 mm to 0.4 mm and then the engraved copper is deposited. Due to a separating layer between the cylinder body and nickel layer, the electrolytically grown nickel can be final be removed from the cylinder as a thin, seamless tube. This method of production is problematic when very often sleeves with different circumferences are required.

Die Herstellung eines Tiefdruckform-Sleeves umfasst also im Falle, dass eine Tiefdruckform in einem neuen nicht bereits vorhandenen Umfang hergestellt werden muss, die Herstellung eines ersten Zylinders, der den druckfertigen Tiefdruckform-Sleeve aufnimmt und der in der Druckmaschine eingesetzt wird und auf diesem die Bearbeitungsschritte, wie Maßdrehen, Polieren und Gravieren, vorgenommen werden können, und die galvanische Herstellung des Nickelsleeves mit anschließender galvanischer Abscheidung vom Gravierkupfer auf einem zweiten Zylinder.The production of a gravure printing sleeve thus includes, in the case that a gravure form must be made in a new size not already present, the production of a first cylinder, which receives the print-ready gravure sleeve and is used in the printing press and on this the processing steps How to measure, polish and engrave, can be made, and the galvanic production of the nickel sleeve with subsequent electrodeposition of engraving copper on a second cylinder.

Weiterhin sind beispielsweise aus der EP 0 730 953 B1 ebenfalls Verfahren zur vereinfachten Herstellung löschbarer, also wieder verwendbarer Tiefdruckformen und dazu benötigte Vorrichtungen bekannt.Furthermore, for example, from the EP 0 730 953 B1 Also known method for the simplified production of erasable, so reusable rotogravure molds and required devices.

Dort wird eine vorstrukturierte Tiefdruckrohform mit einem mind. auf die maximal zu übertragende Farbmenge ausgelegten Grundraster in einem ersten Schritt mittels einer Füllsubstanz durch eine Antragseinrichtung befüllt. Als Substanz für die Befüllung kann beispielsweise ein thermoplastischer Kunststoff oder ein Wachs, Lacke oder eine vernetzbare Polymerschmelze bzw. -lösung, die man auch als Reaktivsystem bezeichnet und die sich durch eine extrem hohe Abriebfestigkeit auszeichnet, verwendet werden. Im Wesentlichen ist dann die Oberfläche der Tiefdruckform glatt. Danach wird die eingefüllte Substanz durch thermische Energieeinwirkung einer Bildpunktübertragungseinrichtung bildmäßig aus den Vertiefungen abgetragen. Nun kann die Tiefdruckform mittels eines Einfärbesystems eingefärbt werden, so dass auf einen Bedruckstoff im Tiefdruck gedruckt werden kann. Nach dem Druckvorgang wird die Oberfläche der Tiefdruckform wieder regeneriert, indem diese von Farbresten gereinigt, die Füllsubstanz bevorzugt vollständig aus den vorstrukturierten Vertiefungen herausgelöst wird und die Vertiefungen wieder gleichmäßig mit der Füllsubstanz befüllt werden: Das Herauslösen der Füllsubstanz aus den vorstrukturierten Vertiefungen kann mittels einer Wärmequelle und/oder Ausblas- bzw. Absaugeinrichtung erfolgen.There, a prestructured Tiefdruckrohform is filled with a mind. On the maximum amount of ink to be transferred designed basic grid in a first step by means of a filling substance by a request device. As a substance for the filling, for example, a thermoplastic material or a wax, paints or a crosslinkable polymer melt or solution, which is also referred to as a reactive system and which is characterized by an extremely high abrasion resistance can be used. In essence, then the surface of the gravure form is smooth. Thereafter, the charged substance is removed imagewise from the depressions by thermal energy action of a pixel transfer device. Now, the gravure form can be colored by means of a Einärbesystems, so that can be printed on a substrate in the gravure printing. After the printing process, the surface of the gravure form is regenerated by cleaning it of color residues, the filling substance is preferably completely dissolved out of the pre-structured depressions and the wells The filling substance can be released from the pre-structured depressions by means of a heat source and / or blow-out or suction device.

Prinzipiell können durch die bildmäßige Ablation Flächen (Bildpixel) adressiert werden, die kleiner als die Flächenelemente des Grundrasters der Tiefdruckrohform sind, wobei insbesondere die bildmäßige Ablation sogar im Wesentlichen unabhängig vom Grundraster durchführbar ist. Allerdings kann die bildmäßige Ablation auch an das Grundraster angepasst, d.h. in einem bestimmten geometrischen Verhältnis dazu stehend sein. Im Idealfall führt die bildmäßige Ablation verfahrenstechnisch notwendige Strukturierungen der Vertiefungen des Grundrasters durch.In principle, surfaces (image pixels) which are smaller than the surface elements of the basic grid of the gravure blank can be addressed by the imagewise ablation, wherein in particular the imagewise ablation can even be carried out essentially independently of the basic grid. However, the imagewise ablation can also be adapted to the basic grid, i. to be in a certain geometric relation to it. In the ideal case, the image-wise ablation carries out procedurally necessary structuring of the depressions of the basic grid.

Aus der DE 44 32 814 A1 ist außerdem bekannt, eine Trägerhülse für Druck- und Übertragungsformen aus einem metallischen Werkstoff herzustellen, deren Ausgangsform ein rechteckiges, dünnwandiges Plattenstück ist, das durch Biegen in die gewünschte Hohlzylinderform gebracht ist und die aufeinander zuweisenden Kanten des Plattenstücks fest miteinander verbunden, vorzugsweise verschweißt sind. Die außen liegende Oberfläche der geschweißten Trägerhülse wird bearbeitet, so dass sich eine homogene kontinuierliche Mantelfläche einstellt. Die Herstellungskosten einer geschweißten und bearbeiteten Präzisionshülse liegen um ein Vielfaches unter den Herstellungskosten von galvanischen Nickelhülsen.From the DE 44 32 814 A1 It is also known to produce a carrier sleeve for printing and transfer molding of a metallic material whose initial shape is a rectangular, thin-walled plate piece, which is brought by bending in the desired hollow cylindrical shape and the facing edges of the plate piece firmly connected, preferably welded. The outer surface of the welded carrier sleeve is processed, so that sets a homogeneous continuous lateral surface. The manufacturing costs of a welded and machined precision sleeve are many times lower than the production costs of galvanic nickel sleeves.

Hiervon ausgehend war es die Aufgabe der Erfindung, eine neue Tiefdruckform, die in einer Ausführungsform auch löschbar und wieder verwendbar sein kann, zu entwickeln, die einfach herstellbar und insbesondere hinsichtlich einer Formatvariabilität erhebliche Vorteile gegenüber dem Stand der Technik aufweist.On this basis, it was the object of the invention to develop a new gravure form, which can also be erasable and reusable in one embodiment, which is easy to manufacture and, in particular with regard to a format variability, has considerable advantages over the prior art.

Diese Aufgabe wird durch eine Tiefdruckform des Anspruchs 1 und durch das Verfahren zur Herstellung derselben nach Anspruch 9 gelöst.This object is achieved by a gravure form of claim 1 and by the method for producing the same according to claim 9.

Erfindungsgemäß wird durch die Verwendung geschweißter Stahlsleeves der voranbeschriebene zweite Zylinder zur galvanischen Herstellung eines Nickelsleeves eingespart, indem statt galvanisch abgeschiedener Nickelsleeves eben geschweißte Stahlsleeves zum Einsatz kommen, wie sie in der DE 44 32 814 A1 beschrieben sind.According to the invention, the use of welded steel sleeves avoids the above-described second cylinder for the galvanic production of a nickel sleeve, in that instead of galvanically deposited nickel sleeves, just welded steel sleeves are used, as described in US Pat DE 44 32 814 A1 are described.

Ein derartiger Stahlsleeve mit einer typischen Wandstärke zwischen 0,1 mm bis 0,4 mm wird mit dem gewünschten Umfang aus dünnwandigem Blech mit der gewünschten Dicke hergestellt und verschweißt und kann den galvanisch hergestellten Nickelsleeve bei der Tiefdruckformherstellung ersetzen. Die für die Tiefdruckform erforderliche Gravurkupferschicht kann bei geeigneter Materialauswahl des geschweißten Sleeves oder Verwendung geeigneter Zwischenschichten direkt auf der geschweißten Stahlhülse aufgebracht werden.Such a steel sleeve with a typical wall thickness of between 0.1 mm to 0.4 mm is manufactured and welded with the desired circumference of thin-walled sheet metal of the desired thickness and can replace the galvanically produced nickel sleeve in the production of intaglio printing. The gravure copper layer required for the intaglio can be applied directly to the welded steel sleeve, with suitable material selection of the welded sleeve or use of suitable intermediate layers.

Des Weiteren bedeckt die Gravurkupferschicht auch die Schweißnaht und es ergibt sich wieder eine für den Endlosdruck geeignete Tiefdruckform.Furthermore, the engraved copper layer also covers the weld seam and again results in a gravure form suitable for continuous printing.

Obwohl eine genaue Kreisgeometrie des Querschnitts des geschweißten Stahlsleeves für die Abscheidung der Gravurkupferschichten nicht erforderlich ist, kann die Kreisförmigkeit des leicht deformierbaren Stahlsleeves z.B. durch kreisförmige Deckel oder andere Geometrien, die einen Kreis definieren, wie z.B. speichenartige Stäbe, deren Endpunkte auf einem Kreis liegen, gewährleistet werden, was gegenüber dem Einsatz eines.eingangs erwähnten zweiten Zylinders viel einfacher verwirklicht werden kann. Außerdem wird die Handhabung des Sleeves beim Verkupfern durch die geringen Massen erleichtert.Although a precise circular geometry of the cross-section of the welded steel sleeve is not required for the deposition of the engraved copper layers, the circularity of the easily deformable steel sleeve may be e.g. by circular lids or other geometries defining a circle, e.g. spoke-like rods whose end points lie on a circle, are guaranteed, which can be realized much easier compared to the use of a second cylinder mentioned at the beginning. In addition, the handling of the sleeve during copper plating is facilitated by the low masses.

Wie bereits ausgeführt, wird in der EP 0 730 953 B1 eine löschbare und wieder verwendbare Tiefdruckform beschrieben, die auch als Sleeve ausgeführt sein kann. Gegenüber einem Tiefdruckzylinder reduziert sich das Gewicht einer solchen Tiefdruckform auf ca. 1 kg bis 2 kg, während ein Tiefdruckzylinder je nach Größe leicht 100 kg wiegen kann.As already stated, in the EP 0 730 953 B1 describes an erasable and reusable gravure form, which can also be designed as a sleeve. Compared to a gravure cylinder, the weight of such a gravure mold reduces to about 1 kg to 2 kg, while a gravure cylinder can easily weigh 100 kg, depending on the size.

Erfindungsgemäß ist also die Tiefdruckform mittels einer Stahlträgerhülse in Form eines Sleeves aufgebaut, dessen Ausgangsform ein rechteckiges Plattenstück mit einer Wandstärke zwischen 0,1 mm bis 0,4 mm ist, das durch Biegen in die gewünschte Hohlzylinderform gebracht ist, und die aufeinander zuweisenden Kanten des Plattenstücks fest miteinander verbunden, insbesondere verschweißt sind und auf dessen äußeren Mantelfläche eine Gravurkupferschicht aufgebracht ist, wobei in der Gravurkupferschicht ein Bildraster oder auch ein Grundraster eingearbeitet ist. Zur Ausbildung einer löschbaren und wieder verwendbaren Tiefdruckform wird das Grundraster gleichmäßig mittels einer Füllsubstanz befüllt und das Füllmaterial aus den Vertiefungen des Grundrasters abgetragen.According to the invention, therefore, the gravure form is constructed by means of a steel carrier sleeve in the form of a sleeve whose initial shape is a rectangular plate piece with a wall thickness between 0.1 mm to 0.4 mm, which is brought by bending in the desired hollow cylindrical shape, and the facing edges of the Plate piece firmly connected to each other, in particular welded and on the outer lateral surface of a engraved copper layer is applied, wherein in the engraved copper layer, a picture grid or a basic grid is incorporated. To form an erasable and reusable gravure form, the basic grid is filled evenly by means of a filling substance and the filling material is removed from the recesses of the basic grid.

Erfindungsgemäß wird eine solche Tiefdruckform derart hergestellt, dass von einer Rolle ein dünnwandiges Stahlblech mit einer Wandstärke zwischen 0,1 mm bis 0,4 mm gezogen wird, im planen Zustand eine Trägerplatte auf das den Umfang und der Breite des zu verwendenden Aufnahmezylinders entsprechende Maß zugeschnitten wird, die Trägerplatte durch Biegen in die gewünschte Hohlzylinderform gebracht wird und die aufeinander zuweisende Kanten der Trägerplatten fest miteinander verbunden, insbesondere verschweißt werden und auf der äußeren Mantelfläche der Stahlträgerhülse eine Gravurkupferschicht galvanisch abgeschieden wird. Die Gravurkupferschicht wird auf Maß gedreht und poliert. In die Gravurkupferschicht wird zur Ausbildung einer Tiefdruckform mit den bekannten Graviertechniken, wie z.B. mechanische Gravur oder Laserätzgravur das zu druckende Bild eingraviert. Zur Herstellung einer löschbaren und wieder verwendbaren Tiefdruckform wird vorzugsweise mittels Laserätzgravur ein Grundraster eingraviert, die Vertiefungen des Grundrasters werden gleichmäßig mittels einer Füllsubstanz durch eine Antragseinrichtung befüllt. Anschließend wird das Füllmaterial durch eine Bildpunktübertragungseinrichtung aus den Vertiefungen abgetragen.According to the invention, such a gravure mold is produced in such a way that a thin-walled steel sheet having a wall thickness of between 0.1 mm and 0.4 mm is drawn from a roll, and a support plate is cut to the size and width of the receiving cylinder to be used in the planned state is, the support plate is brought by bending in the desired hollow cylindrical shape and the mutually facing edges of the support plates firmly connected to each other, in particular welded and on the outer surface of the steel support sleeve, a gravure copper layer is electrodeposited. The engraved copper layer is turned to size and polished. Into the engraved copper layer is used to form a gravure form with the known engraving techniques, such as e.g. engraved by mechanical engraving or laser etching engraving the image to be printed. To produce an erasable and reusable intaglio printing plate, a basic grid is preferably engraved by means of laser etching engraving, the depressions of the basic grid are filled uniformly by means of a filling substance by an applicator device. Subsequently, the filler material is removed by a pixel transfer device from the wells.

Das Metallblech, das zur Herstellung des rohrförmigen Tiefdruckform-Sleeves benutzt wird, kann auch bereits als ein Verbund aus einem die Festigkeitseigenschaft liefernden Stahlblech und einer die Gravur ermöglichenden Gravurkupferschicht vorliegen. Bevorzugt ist jedoch, dass in einem galvanischen Prozess die Gravurkupferschicht auf die rohrförmige Trägerhülse aufgebracht wird.The metal sheet used to make the tubular gravure sleeve may also already be used as a composite of a strength property steel sheet and an engraving engraving copper layer available. However, it is preferred that the engraved copper layer is applied to the tubular carrier sleeve in a galvanic process.

Bevorzugt deckt die aufgebrachte Gravurkupferschicht die Schweißnaht der Trägerhülse vollständig ab, so dass die erfindungsgemäß ausgebildete Tiefdruckform das Aufbringen von 360°-Druckbildern (Endlosdruck) erlaubt, wie sie z.B. im Verpackungs- und Dekordruck üblich sind.Preferably, the applied engraving copper layer completely covers the weld seam of the carrier sleeve, so that the intaglio printing form according to the invention allows the application of 360 ° print images (continuous printing), as e.g. are common in packaging and decor printing.

Vor dem Aufbringen der Gravurkupferschicht auf die Trägerhülse kann auf diese vorher auch eine Zwischenschicht aufgebracht werden, die die Haftung und den Abscheideprozess des Gravurkupfers unterstützt. Zudem müssen für die weiteren Prozessschritte einerseits zur Fertigung der konventionellen Tiefdruckform bzw. des Mastersleeves für eine löschbare und wieder verwendbare Tiefdruckform wie

  1. a) galvanisches Aufbringen der Kupferschicht,
  2. b) Maßdrehen der Kupferschicht,
  3. c) Polieren der Kupferschicht,
  4. d) Aufbringen des Grundrasters und
  5. e) galvanisches Aufbringen einer Verchromung
und andererseits zur Herstellung / Wiederaufbereitung der wieder verwendbaren Tiefdruckform wie
  • f) Entfernen des Füllmaterials (nicht bei der Erstverwendung),
  • g) Aufbringen des neuen Füllmaterials,
  • h) Härten des Füllmaterials,
  • i) Polieren des wieder verwendbaren Tiefdruckform-Sleeves,
  • j) Bebildern und
  • k) Drucken
auch Vorrichtungen zur Aufnahme der Trägerhülse vorhanden sein.Before the engraving copper layer is applied to the carrier sleeve, an intermediate layer, which assists the adhesion and the deposition process of the engraved copper, can be applied beforehand to this. In addition, for the further process steps on the one hand for the production of the conventional gravure form or the master sleeve for an erasable and reusable gravure form such as
  1. a) electroplating the copper layer,
  2. b) turning the copper layer,
  3. c) polishing the copper layer,
  4. d) applying the basic grid and
  5. e) electroplating a chrome plating
and on the other hand, for the production / recycling of the reusable intaglio such as
  • f) removing the filling material (not at first use),
  • g) applying the new filling material,
  • h) hardening of the filling material,
  • i) polishing the reusable gravure sleeve,
  • j) Imaging and
  • k) Print
Also devices for receiving the carrier sleeve be present.

An diese Vorrichtungen werden seitens der jeweiligen Prozessschritte unterschiedliche Anforderungen gestellt.Different requirements are placed on these devices by the respective process steps.

Vorrichtung für Prozessschritte mit besonderen Anforderungen an die Kreisstabilität des Querschnitts des Tiefdruckform-Sleeves:Apparatus for process steps with special demands on the circuit stability of the cross-section of the gravure printing sleeve:

Für das Maßdrehen b) und die Polierprozesse c) und i) sowie für das Drucken k) und evtl. - je nach Ausführung - auch für den Füllprozess g) und das Aufbringen des Grundrasters d) ist eine besonders formstabile Aufnahme des Tiefdruckform-Sleeves erforderlich, da bei diesen Prozessen Kräfte auf den Sleeve wirken, die zu unerwünschten Abweichungen des Sleevequerschnitts von der Kreisform führen können. Für diese Prozessschritte kann der Tiefdruckform-Sleeve durch einfache, speziell für einen bestimmten Durchmesser gefertigte und somit durchmesserfeste Hülsen oder durch in bestimmten Grenzen durchmesservariable Hülsen aufgenommen werden, die beide eine standardisierte Innengeometrie haben, die von einer für alle Formate gleichen, universellen Spannvorrichtung aufgenommen wird (siehe Figur 1). Die gleiche Kombination aus Hülse und Aufnahmevorrichtung kann auch für die Aufnahme des Sleeves in Form eines Druckzylinders in der Druckmaschine entsprechend verwendet werden. Dadurch verringert sich der Aufwand erheblich, wenn Tiefdruckform-Sleeves mit unterschiedlichen Umfängen hergestellt werden müssen, um den Umfang der Tiefdruckform an das zu druckende Produkt anzupassen. Es ist dann für verschiedene Zylinderumfänge und damit Formate nur noch eine, speziell auf die jeweilige Druckmaschine angepasste Aufnahmevorrichtung, d.h. Druckzylinder erforderlich, die Hülsen für unterschiedliche Formate aufnehmen kann.For the Maß turning b) and the polishing processes c) and i) and for printing k) and possibly - depending on the version - also for the filling process g) and the application of the basic grid d) a particularly dimensionally stable recording of the gravure printing sleeve is required because forces act on the sleeve in these processes, which can lead to undesirable deviations of the sleeve cross section from the circular shape. For these process steps, the gravure sleeve can be accommodated by simple, specially made for a certain diameter and thus diameter-resistant sleeves or by diameter-variable within certain limits sleeves, both of which have a standardized internal geometry, which is taken from a same for all formats, universal clamping device (please refer FIG. 1 ). The same combination of sleeve and receiving device can also be used accordingly for receiving the sleeve in the form of a printing cylinder in the printing press. As a result, the cost significantly reduced when gravure sleeves need to be made with different circumferences to adjust the size of the gravure mold to the product to be printed. It is then for different Zylinderumfänge and thus formats only one, specially adapted to the particular printing machine recording device, ie pressure cylinder required that can accommodate sleeves for different formats.

Aufnahmevorrichtung für Prozessschritte, die keine besonderen Anforderungen an die Kreisstabilität des Querschnitts des Tiefdruckform-Sleeves stellen:Receiving device for process steps, which make no special demands on the circuit stability of the cross section of the gravure form sleeve:

Für die Prozessschritte a) galvanisches Aufbringen der Kupferschicht, d) Aufbringen des Grundrasters, e) galvanisches Aufbringen der Verchromung und f) Entfernen des alten Füllmaterials und evtl. g) Aufbringen des neuen Füllmaterials, h) Härten des Füllmaterials und j) Bebildern der Tiefdruckform muss der Tiefdruckform-Sleeve nicht durch einen stabilen Zylinder oder eine formstabile Hülse aufgenommen werden, da diese Prozesse keine oder nur geringe mechanische Kräfte auf den Sleeve übertragen.For the process steps a) electroplating the copper layer, d) applying the basic grid, e) electroplating the chrome plating and f) removing the old filling material and possibly g) applying the new filling material, h) hardening the filling material and j) imaging the gravure form the intaglio sleeve does not have to be taken up by a sturdy cylinder or a rigid sleeve, as these processes do not transfer any or only small mechanical forces to the sleeve.

Für diese Prozesse sind bekannte hydraulische oder mit Druckluft arbeitende mechanische Spannsysteme einsetzbar, die direkt den Tiefdruckform-Sleeve aufnehmen können. Es ist auch möglich, einen einfach mit ausreichender Genauigkeit zu fertigenden kreisförmigen Einsatz in beide Enden des Sleeves einzusetzen, der seinerseits wiederum durch Spannsysteme, wie sie z.B. in Dreh- oder Schleifmaschinen vorkommen, aufgenommen werden kann (siehe Figur 2). Bei Bedarf kann dieser kreisförmige Einsatz Hilfsmittel zum Klemmen oder Befestigen umfassen, die ein Herausfallen der Einsätze bei der Handhabung des Tiefdruckform-Sleeves verhindern. Eine weitere Möglichkeit besteht darin, elastische oder aufblasbare Füllkörper zu verwenden, die über den gesamten Umfang des Sleevequerschnitts die gleiche Kraft auf den Sleeve ausüben und dadurch die Kreisform des Sleeves herstellen bzw. erhalten (siehe Figur 3). Ein derartiger Füllkörper kann mit sehr geringem Gewicht hergestellt werden, so dass die Handhabung der Sleeves inkl. der Füllkörper bei Übergabe von einem Prozess zum anderen sehr komfortabel bleibt und gleichzeitig die Kreisform des Sleevequerschnitts in ausreichendem Maße erhalten bleibt.For these processes, known hydraulic or compressed air mechanical tensioning systems can be used, which can directly record the gravure sleeve. It is also possible to use a circular insert which is easy to produce with sufficient accuracy in both ends of the sleeve, which in turn can be accommodated by clamping systems such as those found in turning or grinding machines (see FIG. 2 ). If desired, this circular insert may include means for clamping or securing which prevent the inserts from falling out during handling of the gravure sleeve. Another possibility is to use elastic or inflatable fillers that exert the same force on the sleeve over the entire circumference of the sleeve cross-section and thereby produce or maintain the circular shape of the sleeve (see FIG. 3 ). Such a filler can be produced with very low weight, so that the handling of the sleeves incl. The packing remains very comfortable when transferring from one process to another while maintaining the circular shape of the sleeve cross-section sufficiently.

Insbesondere beim Prozessschritt Drucken kann zwischen Sleeve und durchmesservariabler Hülse sowie zwischen Hülse und der für alle Formate gleichen, universellen Vorrichtung Farbe in diese Zwischenräume eintreten, die das leichte Trennen des Tiefdruckform-Sleeves von der Hülse sowie der für alle Formate gleichen, universellen Spannvorrichtung erschweren. Um dies zu verhindern, können mehrere Maßnahmen ergriffen werden:In particular, in the process step printing can occur between sleeve and variable diameter sleeve and between sleeve and the same for all formats, universal device color in these spaces, the light Separate the gravure sleeve of the sleeve and the same universal clamping device for all formats. To prevent this, several measures can be taken:

Abdichten des Zwischenraums zwischen Tiefdruckform-Sleeves und durchmesservariabler Hülse oder Abdichten des Zwischenraums zwischen durchmesservariabler Hülse und der für alle Formate gleichen, universellen Spannvorrichtung, oder Ausführung der durchmesservariablen Hülse und der für alle Formate gleichen universellen Spannvorrichtung in einer Weise, dass der Zwischenraum zwischen dieser Hülse und dieser Spannvorrichtung oberhalb des Farbniveaus in der Farbwanne der Druckmaschine liegt.Sealing the gap between gravure sleeves and variable diameter sleeve or sealing the gap between the variable diameter sleeve and the same for all formats, universal jig, or execution of the variable diameter sleeve and the same universal clamping device for all formats in such a way that the gap between this sleeve and this clamping device is above the color level in the inkwell of the printing press.

Die erfindungsgemäße Tiefdruckform hat wie voran beschrieben eine Wandstärke von 0,1 mm bis 0,5 mm und wird auf ein formstabiles Aufnahmerohr mit einer Wandstärke > 5 mm aufgeschoben, wobei der Außendurchmesser des Aufnahmerohrs um 0,1 mm bis 0,5 mm kleiner ist als der Innendurchmesser der sleeveförmigen Tiefdruckform. Das Aufnahmerohr hat am Umfang mit Druckluft beaufschlagbare Öffnungen, so dass das Aufschieben des Tiefdruckformsleeves durch die Ausbildung eines Luftkissens zwischen Aufnahmerohr und Tiefdruckform unterstützt wird.The intaglio printing plate according to the invention has, as described above, a wall thickness of 0.1 mm to 0.5 mm and is pushed onto a dimensionally stable receiving tube with a wall thickness> 5 mm, wherein the outer diameter of the receiving tube is smaller by 0.1 mm to 0.5 mm as the inner diameter of the sleeveförmigen rotogravure mold. The receiving tube has at the periphery with compressed air acted upon openings, so that the pushing of the gravure printing sleeve is supported by the formation of an air cushion between pick-up tube and gravure form.

Bei einer weiteren Möglichkeit der Aufnahme des Tiefdruckform-Sleeves auf ein Aufnahmerohr wird der Außendurchmesser des Aufnahmerohrs an den Innendurchmesser des Tiefdruckformsleeves so angepasst, dass eine kraftschlüssige Verbindung zwischen Aufnahmerohr und Sleeve zustande kommt. Das wird erreicht durch hydraulisch oder pneumatisch bewegte Umfangssegmente oder durch eine durch hydraulischen oder pneumatischen Druck oder thermische Ausdehnung verursachte elastische Materialverformung des Umfangs des Aufnahmerohrs. Dabei ist der Innendurchmesser des Aufnahmerohrs passend zu einer universellen Spannvorrichtung ausgeführt. Die universelle Spannvorrichtung genügt gleichzeitig den Anforderungen des Lagers für die Aufnahme der Tiefdruckzylinder in einer Tiefdruckmaschine und kann damit zusammen mit der Trägerhülse bzw. dem Aufnahmerohr des Tiefdruckform-Sleeves und dem Tiefdruckform-Sleeve selbst als kompletter Tiefdruckformzylinder in der Druckmaschine eingesetzt werden. Bevorzugt wird der Zwischenraum zwischen universeller Spannvorrichtung und dem Aufnahmerohr gegen das Eindringen von Druckfarbe abgedichtet.In a further possibility of receiving the gravure printing sleeve on a receiving tube, the outer diameter of the receiving tube is adapted to the inner diameter of the gravure printing sleeve so that a frictional connection between the receiving tube and sleeve is made. This is achieved by hydraulically or pneumatically moved circumferential segments or by a caused by hydraulic or pneumatic pressure or thermal expansion elastic material deformation of the circumference of the receiving tube. The inner diameter of the receiving tube is designed to fit a universal clamping device. The universal clamping device simultaneously meets the requirements of the camp for receiving the gravure cylinder in a gravure printing machine and can thus be used together with the carrier sleeve or the receiving tube of the gravure printing sleeve and the gravure sleeve itself as a complete gravure cylinder in the printing press. Preferably, the gap between the universal clamping device and the receiving tube is sealed against the ingress of ink.

Claims (16)

  1. A gravure printing forme sleeve which comprises a steel carrier tube, the basic form of which is a rectangular plate piece with a wall thickness between 0.1 mm and 0.4 mm which is brought into the desired hollowly cylindrical form by bending, the facing edges of the plate piece being fixedly connected together, in particular welded, and an engraved copper layer being applied to its outer lateral surface,
    characterised in that
    the inside diameter of the gravure printing forme sleeve is provided for reception on one or more circular insert pieces that are constructed with or without extension pieces, which are suitable for reception on devices which are used for the production of a gravure printing forme sleeve.
  2. A gravure printing forme sleeve according to claim 1, characterised in that the engraved copper layer completely covers the outer lateral surface of the steel carrier tube including the weld seam of the same.
  3. A gravure printing forme sleeve according to claim 1 or 2, characterised by use on a receiving cylinder with a variable outside diameter whose wall thickness is greater than 5 mm so that its outside diameter can be matched to the inside diameter of the steel carrier tube in such a way that a force-locking connection can be established between the receiving cylinder and the steel carrier tube.
  4. A gravure printing forme sleeve according to claim 1 or 2, characterised by use on a receiving cylinder whose wall thickness is greater than 5 mm and whose outside diameter is only a few tenths mm greater than the inside diameter of the gravure printing forme sleeve and located on whose circumference there are openings to which compressed air can be applied.
  5. A gravure printing forme sleeve according to claim 4, characterised in that the intermediate space between the receiving cylinder and the gravure printing forme sleeve is sealed to prevent the penetration of printing ink.
  6. A gravure printing forme sleeve according to one of the preceding claims, characterised in that the inside diameter of the receiving cylinder is provided for reception on a clamping device which together with the receiving cylinder as the gravure printing forme cylinder can be inserted into a gravure printing machine.
  7. A gravure printing forme sleeve according to one of the preceding claims, characterised in that the inside diameter of the gravure printing forme sleeve is provided for reception on an elastic filling body which is constructed with or without extension pieces which is suitable for reception on devices which are used for the production of a gravure printing forme sleeve and forces the gravure printing forme sleeve into a circular cross-sectional form.
  8. A gravure printing forme sleeve according to claim 7, characterised in that the elastic filling body is under pneumatic pressure.
  9. Method for the production of a gravure printing forme sleeve in accordance with claim 1, in which from a thin-walled steel sheet, drawn from a roll, with a wall thickness between 0.1 mm to 0.4 mm in the planar state a carrier plate is cut to the measure that corresponds to the circumference and the width of the receiving cylinder to be used, the carrier plate is brought into the desired hollowly cylindrical form by bending, and the facing edges of the carrier plate are fixedly connected together, in particular welded, an engraved copper layer is electrodeposited on the outer lateral surface of the steel carrier tube,
    characterised in that
    the non-dimensionally stable gravure printing forme sleeve is forced into a circular cross-sectional form as a result of the insertion of circular closing pieces at the end of the non-dimensionally stable gravure printing forme sleeve, and the inserts are shaped in such a way that they can be received in standard clamping devices for the further processing of the gravure printing forme sleeve.
  10. Method according to claim 9, characterised in that during the manufacture of the gravure printing forme sleeve in addition to process step a) galvanic application of the engraved copper layer, the further process steps b) dimensional rotation of the copper layer, c) polishing of the copper layer, d) incorporation of the basic screen or a halftone screen corresponding to the printing-forme content to be printed into the engraved copper layer, and e) galvanic application of a chrome plating on the basic screen or the halftone screen corresponding to the printing-forme content to be printed are also carried out.
  11. Method according to claims 9 and 10, characterised in that the process steps f) removal of the filling material (not in the case of the first application), g) filling of the basic screen, h) hardening of the filling material, i) polishing of the gravure printing forme sleeve, j) imaging, and k) printing are applied to the gravure printing forme sleeve.
  12. Method according to claims 10 and 11, characterised in that at least the process steps b) dimensional rotation of the copper layer, the polishing processes c) and i), and k) printing on a dimensionally stable receiving cylinder, such as, for example, the printing cylinder, are effected.
  13. Method according to claim 12, characterised in that the process step g) filling of the basic screen on a dimensionally stable receiving cylinder is effected.
  14. Method according to claims 10 to 11, characterised in that at least one of the process steps a) galvanic application of the copper layer, d) application of the basic screen, e) galvanic application of the chrome plating, f) removal of the old filling material, g) application of the new filling material, h) hardening of the filling material, and j) imaging on a receiving device that makes small demands on the circular stability of the cross section of the steel carrier tube are effected.
  15. Method according to one of claims 9 to 14, characterised in that the circular closing pieces at the end of the non-dimensionally stable gravure printing forme sleeve comprise auxiliary means for the purposes of clamping or securement in order to prevent the circular closing pieces from falling out during the handling of the non-dimensionally stable gravure printing forme sleeve.
  16. Method according to claim 14, characterised in that the non-dimensionally stable gravure printing forme sleeve as a result of the insertion of elastic filling bodies which over the entire circumference of the non-dimensionally stable gravure printing forme sleeve exerts the same radial force onto the non-dimensionally stable gravure printing forme sleeve so that the latter is forced into a circular cross-sectional form.
EP06806602A 2005-11-02 2006-10-28 Gravure printing-form sleeve and production thereof Not-in-force EP1963106B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005052159A DE102005052159A1 (en) 2005-11-02 2005-11-02 Gravure printing plate sleeve, has steel girder casing whose initial shape is rectangular plate piece having wall thickness specific millimeters, where steel girder is brought to desired hollow cylinder form by bending
PCT/EP2006/010396 WO2007051573A1 (en) 2005-11-02 2006-10-28 Gravure printing-form sleeve and production thereof

Publications (2)

Publication Number Publication Date
EP1963106A1 EP1963106A1 (en) 2008-09-03
EP1963106B1 true EP1963106B1 (en) 2009-09-02

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US (1) US20090044713A1 (en)
EP (1) EP1963106B1 (en)
JP (1) JP2009514697A (en)
AT (1) ATE441535T1 (en)
CA (1) CA2628171A1 (en)
DE (2) DE102005052159A1 (en)
WO (1) WO2007051573A1 (en)

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CN107073936B (en) * 2014-05-20 2019-12-13 维罗斯-纯粹数字有限公司 Printing system and method
WO2019077918A1 (en) * 2017-10-18 2019-04-25 株式会社シンク・ラボラトリー Gravure printing seamless sleeve
DE202022106780U1 (en) 2022-06-10 2022-12-20 Daetwyler Ibo Tec Gmbh printing form

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EP1963106A1 (en) 2008-09-03
CA2628171A1 (en) 2007-05-10
JP2009514697A (en) 2009-04-09
DE502006004763D1 (en) 2009-10-15
WO2007051573A1 (en) 2007-05-10
DE102005052159A1 (en) 2007-05-03
US20090044713A1 (en) 2009-02-19
ATE441535T1 (en) 2009-09-15

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