EP0473973B1 - Procédé pour le traitement de plaques d'impression intaglio - Google Patents

Procédé pour le traitement de plaques d'impression intaglio Download PDF

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Publication number
EP0473973B1
EP0473973B1 EP19910113491 EP91113491A EP0473973B1 EP 0473973 B1 EP0473973 B1 EP 0473973B1 EP 19910113491 EP19910113491 EP 19910113491 EP 91113491 A EP91113491 A EP 91113491A EP 0473973 B1 EP0473973 B1 EP 0473973B1
Authority
EP
European Patent Office
Prior art keywords
outer layer
layer
zinc
intaglio printing
printing plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19910113491
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German (de)
English (en)
Other versions
EP0473973A1 (fr
Inventor
Max Dätwyler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daetwyler Global Tec Holding AG
Original Assignee
MDC Max Daetwyler AG Bleienbach
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MDC Max Daetwyler AG Bleienbach filed Critical MDC Max Daetwyler AG Bleienbach
Publication of EP0473973A1 publication Critical patent/EP0473973A1/fr
Application granted granted Critical
Publication of EP0473973B1 publication Critical patent/EP0473973B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam

Definitions

  • the present invention relates to a method for processing gravure printing forms consisting of at least one base body and a metallic outer layer carried by it, as well as a printing form suitable for carrying out this method.
  • DE-PS en 27 09 554 and 27 19 275 describes devices for laser processing of gravure cylinders of a conventional type, that is to say of gravure cylinders with an outer layer of electrolytically applied copper. In practice, however, the laser processing of gravure cylinders with an outer copper layer could not prevail.
  • the present invention has for its object to provide a method of the type mentioned for the laser processing of the metallic outer layer of printing forms, which can be used successfully under the conditions prevailing in practice.
  • the present invention is based on the finding that the laser processing of gravure forms, in particular gravure cylinders, of the conventional type with an outer layer made of copper is associated with difficulties for the following reasons.
  • Figures 1-4 show excerpts from differently designed gravure forms.
  • the printing form 1 shown only in part in FIG. 1 (in the present case a gravure cylinder as a preferred embodiment) has a base body 2 made of a suitable material, e.g. Steel, aluminum or plastic.
  • a metallic intermediate layer 3 is applied to this base body 2 in a known manner, preferably galvanically.
  • the intermediate layer 3 consists for example of copper or zinc.
  • This intermediate layer 3, which serves to adapt to different cylinder diameters, is also present in the embodiments according to FIGS. 2-4, but is no longer shown in these figures.
  • this material has an abrasion and compressive strength that is at least as high as that of copper. Furthermore, this material can be machined at least as well as copper and allows the reproducibility of the grid pattern to be reproduced, which is comparable to that of copper.
  • a material that has these properties and that also meets the printing requirements is in particular zinc or a zinc alloy.
  • the metals and metal alloys used for the outer layer 4 must have an abrasion and compressive strength that is at least as high as that of copper and must be machinable at least as well as copper.
  • the reproducibility of the grid pattern from printing form to printing form must be comparable to that with outer layers made of copper.
  • these metals and metal alloys must also meet the printing requirements and in particular enable a very high quality of the surface 4a of the outer layer 4. Furthermore, it is important that the ratchet cups 5 can be lifted in the outer layer 4 by means of laser beams at a very high speed. The latter requirement is particularly important for the processing of gravure cylinders.
  • a heat-insulating intermediate layer 6 is arranged below the metallic outer layer 4, which largely prevents the outflow of the heat generated during laser processing from the outer layer 4 into the intermediate layer 3 or the base body 2.
  • This heat insulation can be influenced on the one hand by the choice of a material with heat-insulating properties and on the other hand by the thickness of the layer 6.
  • Possible materials for this heat-insulating layer 6 are: plastic, ceramic, metals or metal alloys with poorer thermal conductivity than the material from which the outer layer 4 is made. Such metals with poor thermal conductivity are e.g. Titanium, tin, zinc etc.
  • other suitable heat insulation materials can of course also be used.
  • the outer layer 4 can also be formed from copper.
  • the outer layer 4 is designed as a so-called dispersion layer, which consists of a carrier or matrix material 8 and particles 7 embedded therein, made of a heat-insulating one Material exists.
  • These particles 7 can be made of plastic, metal oxides, ceramics, silicon carbide, molybdenum and the like materials, for example.
  • Zinc, copper or other metallic materials or their alloys can be used as the carrier or matrix material 8.
  • the incorporation of the particles 7 into the outer layer 4 can have a positive influence on the properties of the outer layer 4 which significantly influence laser processing, for example the evaporation energy, the conductivity and the absorption properties of the layer 4.
  • the heat flow is not only influenced as in the embodiment according to FIG. 2 towards the base body 2, but also spatially, i.e. also in the direction of the course of the outer layer 4.
  • the heat flow in the outer layer is also considerably reduced by these particles 8, as a result of which, for example, the deformation of extremely thin well walls can be prevented.
  • the embedded particles 7 are selected in terms of shape, size and number per unit volume so that the respective printing requirements (e.g. print quality) can be met.
  • FIG. 4 Another embodiment is described in FIG. 4.
  • the grid cells 5 are then worked directly through this wear-resistant cover layer 9 into the underlying material of the outer layer 4.
  • This embodiment has the advantage that printing form 1 is available for printing directly after laser processing, since chrome layer 9, which is usually only applied after engraving, is already present.
  • the material that is used to form the cover layer 9 should form a very stable oxide on its surface, which makes the adhesion of other materials very difficult or even prevents it. This is the case with chrome, for example.
  • the metallic outer layer 4 can consist of zinc or its alloys or also other metals and metal alloys including copper. In addition, it is also conceivable to produce the outer layer 4 from a suitable plastic.
  • the absorption of the laser beams is increased if the outer layer 4 to be engraved is additionally covered with a black layer.
  • This layer can consist of a chemically or electrochemically applied chromium or chromate layer.
  • the layer can also be applied by means of a plasma or vacuum coating process and can also consist of other materials, such as lacquer or plastics.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (10)

  1. Procédé de traitement de plaques d'impression intaglio (1), composées d'un corps de base (2), au moins, et d'une couche externe métallique (4), supportée par ce dernier, selon lequel les creux tramés (5) sont réalisés par jets laser dans la couche externe (4), caractérisé par l'utilisation d'une forme d'impression (1), munie d'une couche externe (4) métallique, composée de zinc ou d'un alliage de zinc, ou comportant du zinc ou un alliage de zinc.
  2. Procédé suivant la revendication 1, caractérisé en ce qu'une couche intermédiaire calorifuge (6) est disposée au dessous de la couche externe métallique (4), cette couche calorifuge se composant d'un matériau isolant, de matière plastique par exemple, ou étant formée par une couche de métal de conductivité thermique inférieure à celle de la couche externe (4).
  3. Procédé suivant la revendication 1, caractérisé en ce que des particules (7) d'un matériau calorifuge, tel que matière plastique, oxyde métallique, carbure de silicium, céramique, ou molybdène, sont enrobées dans la couche externe métallique (4).
  4. Procédé suivant la revendication 1, caractérisé en ce que la couche externe métallique (4) est munie, avant te traitement au laser, d'une couche de protection (9) composée d'un matériau résistant à l'usure et à l'abrasion, d'un oxyde métallique ou de chrome, par exemple.
  5. Procédé suivant la revendication 1, caractérisé en ce que la couche externe (4) est munie d'une couche noire, qui provoque une hausse de l'absorption des jets laser.
  6. Plaque d'impression intaglio (1) adaptée à la réalisation de creux tramés (5) par jets laser, composée d'un corps de base (2), au moins, et d'une couche externe métallique (4) supportée par ce dernier, caractérisée en ce que la couche externe (4) se compose de zinc ou d'un alliage de zinc, ou comporte du zinc ou un alliage de zinc.
  7. Plaque d'impression intaglio suivant la revendication 6, caractérisée en ce qu'une couche intermédiaire (6) calorifuge, composée d'un matériau isolant, tel que matière plastique, ou formée par une couche de métal de conductivité thermique inférieure à celle de la couche externe (4), est disposée au-dessous de la couche externe (4).
  8. Plaque d'impression intaglio suivant la revendication 6, caractérisée en ce que des particules (7) d'un matériau calorifuge, tel que matière plastique, oxyde métallique, carbure de silicium, céramique ou molybdène, sont enrobées dans la couche externe métallique (4).
  9. Plaque d'impression intaglio suivant la revendication 6, caractérisée en ce que la couche externe métallique (4) est munie d'une couche de protection (9) composée d'un matériau résistant à l'abrasion et à l'usure, d'un oxyde métallique ou de chrome, par exemple.
  10. Plaque d'impression intaglio suivant la revendication 6, caractérisée en ce que la couche externe (4) est munie d'une couche noire, qui provoque une hausse de l'absorption des jets laser.
EP19910113491 1990-09-04 1991-08-12 Procédé pour le traitement de plaques d'impression intaglio Expired - Lifetime EP0473973B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH286490 1990-09-04
CH2864/90 1990-09-04

Publications (2)

Publication Number Publication Date
EP0473973A1 EP0473973A1 (fr) 1992-03-11
EP0473973B1 true EP0473973B1 (fr) 1995-11-29

Family

ID=4243309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910113491 Expired - Lifetime EP0473973B1 (fr) 1990-09-04 1991-08-12 Procédé pour le traitement de plaques d'impression intaglio

Country Status (3)

Country Link
EP (1) EP0473973B1 (fr)
JP (1) JPH04234647A (fr)
DE (1) DE59106977D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1595697A2 (fr) 1998-09-08 2005-11-16 Hell Gravure Systems GmbH Procédé utilisant une source laser pour générer des creux sur des formes d'impression
EP1985459A2 (fr) 2007-04-23 2008-10-29 Mdc Max Daetwyler AG Fabrication de formes d'impression à héliogravure

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5663803A (en) * 1993-02-25 1997-09-02 Ohio Electronic Engravers, Inc. Engraving method and apparatus for engraving areas using a shaping signal
US5675420A (en) 1995-01-23 1997-10-07 Ohio Electronic Engravers, Inc. Intaglio engraving method and apparatus
US6025921A (en) * 1995-01-23 2000-02-15 Ohio Electronics Engravers, Inc. Method and apparatus for engraving a mixed pattern
US5555473A (en) * 1995-02-21 1996-09-10 Ohio Electronic Engravers, Inc. Engraving system and method for helical or circumferential engraving
DE19507827C2 (de) * 1995-02-22 1999-03-25 Hartmut Frerichs Verfahren zur Herstellung einer Druckform für den Offset- oder Tiefdruck
WO1999064250A1 (fr) * 1998-06-08 1999-12-16 Mdc Max Dätwyler Bleienbach Ag Procede et dispositif de traitement d'un imprime destines a l'industrie graphique
US6433890B1 (en) 1998-09-24 2002-08-13 Mdc Max Daetwyler Ag System and method for improving printing of a leading edge of an image in a gravure printing process
DE10036995A1 (de) * 2000-07-29 2002-02-07 Heidelberger Druckmasch Ag Verfahren zum Gravieren einer Druckform mit Laserstrahl
DE50110828D1 (de) 2000-11-15 2006-10-05 Mdc Max Daetwyler Ag Verfahren zur herstellung von rasternäpfchen in einer tiefdruckform und in dem verfahren verwendbarer grundkörper
ITMC20020011A1 (it) * 2002-02-06 2003-08-06 Tech Epikos Srl Metodo e relativo impianto per l'incisione laser di lastre o cilindricalcografici.
EP1410923B1 (fr) 2002-10-17 2006-08-09 Hell Gravure Systems GmbH Procédé de production d'une forme d'impression pour la rotogravure
JP2004136674A (ja) * 2002-10-17 2004-05-13 Hell Gravure Systems Gmbh 凹版印刷に用いられる印刷版を製造するための方法、凹版印刷に用いられる印刷版およびその使用
AT504185B1 (de) * 2003-07-03 2009-06-15 Oebs Gmbh Verfahren zur herstellung einer druckplatte
JP5077539B2 (ja) * 2007-08-10 2012-11-21 東洋製罐株式会社 凹版の製造方法
WO2010102808A2 (fr) * 2009-03-13 2010-09-16 Ipt International Plating Technologies Gmbh Pièce présentant au moins une couche à base de nickel
EP2438219B1 (fr) * 2009-03-13 2015-09-30 Stohrer IPT AG Piece presentant deux couches a base de nickel
CN116080252A (zh) * 2023-02-02 2023-05-09 苏州蓝昇精密制版科技有限公司 一种网版及网版制备方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE728837C (de) * 1935-05-30 1942-12-04 Josef Horn Verfahren zum Herstellen von Flachdruckplatten
US3474457A (en) * 1967-11-13 1969-10-21 Precision Instr Co Laser recording apparatus
DE2218393A1 (de) * 1972-04-15 1973-10-25 Steigerwald Strahltech Mittels energiestrahls gravierbares werkstueck, insbesondere tiefdruckform oder dergleichen
DE2344233A1 (de) * 1972-09-09 1974-03-21 Newton Horwood Ltd Druckplatte und verfahren zu ihrer herstellung
GB1442087A (en) * 1973-02-27 1976-07-07 Laser Graphic Systems Corp Composite printing and relief plates
US4060032A (en) * 1975-05-21 1977-11-29 Laser Graphic Systems Corporation Substrate for composite printing and relief plate
JPS5646753A (en) * 1979-09-26 1981-04-28 Dainippon Printing Co Ltd Preparation of gravure lithographic plate
NL8702724A (nl) * 1987-11-13 1989-06-01 Twentse Graveerind Substraat voorzien van slijtvaste deklaag en werkwijze voor het aanbrengen van een dergelijke deklaag.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1595697A2 (fr) 1998-09-08 2005-11-16 Hell Gravure Systems GmbH Procédé utilisant une source laser pour générer des creux sur des formes d'impression
DE19840926B4 (de) * 1998-09-08 2013-07-11 Hell Gravure Systems Gmbh & Co. Kg Anordnung zur Materialbearbeitung mittels Laserstrahlen und deren Verwendung
EP1985459A2 (fr) 2007-04-23 2008-10-29 Mdc Max Daetwyler AG Fabrication de formes d'impression à héliogravure

Also Published As

Publication number Publication date
JPH04234647A (ja) 1992-08-24
EP0473973A1 (fr) 1992-03-11
DE59106977D1 (de) 1996-01-11

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