EP0339409A2 - Process and apparatus for flexographic printing - Google Patents

Process and apparatus for flexographic printing Download PDF

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Publication number
EP0339409A2
EP0339409A2 EP89106782A EP89106782A EP0339409A2 EP 0339409 A2 EP0339409 A2 EP 0339409A2 EP 89106782 A EP89106782 A EP 89106782A EP 89106782 A EP89106782 A EP 89106782A EP 0339409 A2 EP0339409 A2 EP 0339409A2
Authority
EP
European Patent Office
Prior art keywords
printing
temperature
inking unit
degrees celsius
water color
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89106782A
Other languages
German (de)
French (fr)
Other versions
EP0339409B1 (en
EP0339409A3 (en
Inventor
Heinrich Konrad Grosshauser
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.)
Koenig and Bauer AG
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Koenig and Bauer AG
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Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP0339409A2 publication Critical patent/EP0339409A2/en
Publication of EP0339409A3 publication Critical patent/EP0339409A3/en
Application granted granted Critical
Publication of EP0339409B1 publication Critical patent/EP0339409B1/en
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
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/02—Letterpress printing, e.g. book printing
    • B41M1/04—Flexographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme

Definitions

  • the invention relates to a method for largely preventing the clogging of rasterized printing plates and a device for carrying out the method according to the preamble of patent claim 1.
  • flexographic printing process It is known using the flexographic printing process to print periodicas, e.g. B. newspapers to use so-called flexographic watercolors with the printing medium paper
  • the flexographic printing process is characterized by the use of screened rollers, which receive their ink application from a chamber doctor blade, and a plastic printing plate, e.g. B. photopolymer printing plate, inking (see also DE-OS 33 20 638; DE-OS 31 35 711).
  • the printing surface of the printing plate is rasterized.
  • the invention has for its object to provide a method and a device for performing the method with which it is possible to clog avoid as far as possible the screened surfaces of plastic-based printing plates that are colored with water colors.
  • the web-fed rotary printing press in which water-dilutable flexographic printing ink (water-based ink) is used, does not have to be stopped in order to remove the surface d. H. to clean the cells of the screened surface of the pressure plate.
  • a driven anilox roller is mounted in side frames.
  • One or more ink application bars are arranged on and off the anilox roller.
  • An upper doctor blade and a lower doctor blade are attached to the paint application bars.
  • the paint application bar is with one opposite the outer surface, over the entire length of the paint application bar extending recess provided. This recess is connected to a paint feed device via a through hole.
  • the anilox roller colors the printing plates on a plastic basis, e.g. B. photopolymers.
  • water is continuously supplied to the chamber of the flushing inking unit via the through-hole, which is optionally kept at a temperature between 9 and 14 degrees Celsius.
  • This water color is continuously fed to the flushing inking unit and the excess water color is continuously removed from the inking unit and returned to the ink supply and tempering device.
  • the ink supply and tempering device keeps the temperature of the water color constant at an optionally set temperature between 9 and 14 degrees Celsius.
  • the anilox roller is hollow and is connected via known rotor connections via feed and return lines to a device for supplying and tempering water color of a preselectable temperature.
  • the water circulation is adjusted so that the surface temperature of the anilox roller is kept constant at a temperature that can be preselected between 18 and 22 degrees Celsius.

Abstract

On a web-fed rotary printing machine working by the flexographic printing process, the clogging of screen surfaces of a printing plate inked by means of water colours is prevented in that the water colour fed to the inking unit and a surface temperature of a screen cylinder are temperature-controlled continuously.

Description

Die Erfindung betrifft ein Verfahren zum weitgehenden Verhindern des Zusetzens von gerasterten Druckplatten und eine Einrichtung zur Durchführung des Verfahrens nach dem Oberbegriff des Patentanspruches 1.The invention relates to a method for largely preventing the clogging of rasterized printing plates and a device for carrying out the method according to the preamble of patent claim 1.

Es ist bekannt unter Anwendung des Flexo-Druckverfahrens zum Druck von Periodicas, z. B. Zeitungen, mit dem Druckträger Papier sogenannte Flexo-Wasserfarben zu verwenden. Das Flexo-Druckverfahren ist charakterisiert durch die Anwendung von gerasterten Walzen, die von einem Kammerrakel ihren Farbauftrag erhalten und eine Kunststoff-Druckplatte, z. B. Photopolymere-Druckplatte, einfärben (siehe auch DE-OS 33 20 638; DE-OS 31 35 711). Die druckende Oberfläche der Druckplatte ist gerastert.It is known using the flexographic printing process to print periodicas, e.g. B. newspapers to use so-called flexographic watercolors with the printing medium paper The flexographic printing process is characterized by the use of screened rollers, which receive their ink application from a chamber doctor blade, and a plastic printing plate, e.g. B. photopolymer printing plate, inking (see also DE-OS 33 20 638; DE-OS 31 35 711). The printing surface of the printing plate is rasterized.

Es hat sich herausgestellt, daß neben allen Vorzügen, die "Wasserfarben", die im wesentlichen aus Farbpigmenten, einem Zusatz und Wasser bestehen, aufweisen, ein sogenanntes "plugging", das ist ein partielles "Zusetzen" des Rasters auf der Druckplatte, vorkommen kann. Diese Störung kann sich dann natürlich auch im gedruckten Bild zeigen. Die Gefahr des Zusetzens von Teilen der Druckplatte ist umso größer, je feiner das Raster und je größer der Flächenanteil der Rasterpunkte pro Flächeneinheit ist.It has been found that, in addition to all the advantages which "water colors" have, which consist essentially of color pigments, an additive and water, so-called "plugging", which is a partial "clogging" of the grid on the printing plate, can occur . This disturbance can of course also show up in the printed image. The risk of clogging parts of the printing plate is greater, the finer the grid and the larger the proportion of the grid points per unit area.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Einrichtung zur Durchführung des Verfahrens zu schaffen, mit denen es möglich ist, das Zusetzen von gerasterten Flächen von Druckplatten auf Kunststoffbasis, die mittels Wasserfarben eingefärbt werden, weitgehendst zu vermeiden.The invention has for its object to provide a method and a device for performing the method with which it is possible to clog avoid as far as possible the screened surfaces of plastic-based printing plates that are colored with water colors.

Diese Aufgabe wird durch die kennzeichnenden Teile der Ansprüche 1 oder 2 gelöst.This object is solved by the characterizing parts of claims 1 or 2.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß die Rollenrotationsdruckmaschine, in der wasserverdünnbaren Flexo-Druckfarbe (Wasserfarbe) verwendet wird, nicht angehalten werden muß, um die Oberfläche d. h. die Näpfchen der gerasterten Fläche der Druckplatte zu reinigen.The advantages that can be achieved with the invention are, in particular, that the web-fed rotary printing press, in which water-dilutable flexographic printing ink (water-based ink) is used, does not have to be stopped in order to remove the surface d. H. to clean the cells of the screened surface of the pressure plate.

Das Verfahren und ein Ausführungsbeispiel der Erfindung werden im folgenden näher beschrieben.The method and an embodiment of the invention are described in more detail below.

In einer das Flexo-Druckverfahren anwendenden Rollenrotationsdruckmaschine zum Drucken von z. B. Zeitungen besteht das Farbwerk z. B. aus einem sogenannten Spülfarbwerk, wie es in der DE-OS 31 35 711 bzw. DE-OS 33 20 638 beschrieben worden ist. In bekannter Weise ist in Seitengestellen eine angetriebene Rasterwalze gelagert. An die Rasterwalze an- und abstellbar sind eine oder mehrere Farbauftragsleisten angeordnet. An den Farbauftragsleisten sind ein oberes Rakelmesser und ein unteres Abstreifmesser befestigt. In angestellem Zustand liegen das Rakelmesser und das Abstreifmesser an einer Mantelfläche der Rasterwalze an. Die Farbauftragsleiste ist mit einer der Mantelfläche gegenüberliegenden, sich über die gesamte Länge der Farbauftragsleiste erstreckenden Ausnehmung versehen. Diese Ausnehmung steht über eine Durchgangsbohrung mit einer Farbzuführeinrichtung in Verbindung. Die Rasterwalze färbt die Druckplatten auf Kunststoffbasis, z. B. Photopolymere, ein.In a rotary printing press using the flexographic printing process for printing e.g. B. Newspapers there is the inking z. B. from a so-called flushing inking unit, as has been described in DE-OS 31 35 711 and DE-OS 33 20 638. In a known manner, a driven anilox roller is mounted in side frames. One or more ink application bars are arranged on and off the anilox roller. An upper doctor blade and a lower doctor blade are attached to the paint application bars. In the engaged state, the doctor blade and the doctor blade lie against a lateral surface of the anilox roller. The paint application bar is with one opposite the outer surface, over the entire length of the paint application bar extending recess provided. This recess is connected to a paint feed device via a through hole. The anilox roller colors the printing plates on a plastic basis, e.g. B. photopolymers.

Aus einer an sich bekannten Farbzuführ- und temperiereinrichtung wird der Kammer des Spülfarbwerkes über die Durchgangsbohrung fortwährend Wasserfarbe zugeführt, die auf einer Temperatur wahlweise zwischen 9 und 14 Grad Celsius gehalten wird. Diese Wasserfarbe wird fortwährend dem Spülfarbwerk zugeführt und die überschüssige Wasserfarbe fortwährend aus dem Farbwerk abgeführt und der Farbzuführ- und temperiereinrichtung zurückgeführt. Die Farbzuführ- und temperiereinrichtung hält die Temperatur der Wasserfarbe auf eine wahlweise eingestellte Temperatur zwischen 9 und 14 Grad Celsius konstant.From a paint supply and temperature control device known per se, water is continuously supplied to the chamber of the flushing inking unit via the through-hole, which is optionally kept at a temperature between 9 and 14 degrees Celsius. This water color is continuously fed to the flushing inking unit and the excess water color is continuously removed from the inking unit and returned to the ink supply and tempering device. The ink supply and tempering device keeps the temperature of the water color constant at an optionally set temperature between 9 and 14 degrees Celsius.

Die Rasterwalze ist hohl und über bekannte Rotoranschlüsse über Vor- und Rücklaufleitungen mit einer Einrichtung zum Zuführen und Temperieren von Wasserfarbe einer vorwählbaren Temperatur verbunden. Die Wasserzirkulation wird dabei so eingestellt, daß die Oberflächentemperatur der Rasterwalze auf einer zwischen 18 und 22 Grad Celsius vorwählbaren Temperatur konstant gehalten wird.The anilox roller is hollow and is connected via known rotor connections via feed and return lines to a device for supplying and tempering water color of a preselectable temperature. The water circulation is adjusted so that the surface temperature of the anilox roller is kept constant at a temperature that can be preselected between 18 and 22 degrees Celsius.

Claims (2)

1. Verfahren zum weitgehenden Verhindern des Zusetzens von Rasterflächen einer von Wasserfarben eingefärbten Druckplatte einer Rollenrotationsdruckmaschine zum Bedrucken eines Druckträgers aus vorzugsweise Papier, dadurch gekennzeichnet, daß einem Farbwerk fortlaufend Wasserfarbe mit einer vorwählbaren Temperatur zwischen 9 und 14 Grad Celsius zugeführt wird, daß die nicht verbrauchte Wasserfarbe aus dem Farbwerk fortlaufend weggeführt wird, daß die Oberflächentemperatur der Rasterwalze des Farbwerkes auf einer zwischen 18 und 22 Grad Celsius vorwählbaren Temperatur konstant gehalten wird.1. A method for largely preventing the clogging of a screen inked by watercolors printing plate of a web-fed rotary printing press for printing on a printing medium made preferably of paper, characterized in that watercolors with a preselectable temperature between 9 and 14 degrees Celsius are continuously supplied to an inking unit so that the unused one Water color is continuously removed from the inking unit in such a way that the surface temperature of the anilox roller of the inking unit is kept constant at a temperature which can be preselected between 18 and 22 degrees Celsius. 2. Einrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß das Wasserfarbe verarbeitende Farbwerk einer nach dem Flexo-Druckverfahren arbeitenden Rollenrotationsdruckmaschine zum Bedrucken eines Druckträgers aus vorzugsweise Papier mit einer die Wasserfarbe auf eine zwischen 9 und 14 Grad Celsius vorwählbaren Temperatur haltenden Einrichtung verbunden ist, daß die Rasterwalze mit einer Einrichtung zum Konstanthalten ihrer Oberflächentemperatur, wählbar zwischen 18 und 22 Grad Celsius, verbunden ist.2. Device for carrying out the method according to claim 1, characterized in that the water color processing inking unit of a rotary rotary printing press working according to the flexographic printing method for printing on a printing medium made preferably of paper with a water color holding device at a preselectable temperature between 9 and 14 degrees Celsius is connected that the anilox roller is connected to a device for keeping its surface temperature constant, selectable between 18 and 22 degrees Celsius.
EP89106782A 1988-04-26 1989-04-15 Process and apparatus for flexographic printing Expired - Lifetime EP0339409B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3814049 1988-04-26
DE3814049A DE3814049A1 (en) 1988-04-26 1988-04-26 METHOD AND DEVICE FOR FLEXO PRINTING

Publications (3)

Publication Number Publication Date
EP0339409A2 true EP0339409A2 (en) 1989-11-02
EP0339409A3 EP0339409A3 (en) 1991-08-07
EP0339409B1 EP0339409B1 (en) 1994-08-10

Family

ID=6352902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106782A Expired - Lifetime EP0339409B1 (en) 1988-04-26 1989-04-15 Process and apparatus for flexographic printing

Country Status (4)

Country Link
US (1) US5010817A (en)
EP (1) EP0339409B1 (en)
JP (1) JP2806968B2 (en)
DE (2) DE3814049A1 (en)

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US5226363A (en) * 1990-09-11 1993-07-13 The Langston Corporation Dual pressure preload system for maintaining a member
US5367982A (en) * 1993-02-25 1994-11-29 Howard W. DeMoore Automatic coating circulation and wash-up system for printing presses
DE9305552U1 (en) * 1993-04-16 1993-06-03 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4413731C2 (en) * 1994-04-20 1998-07-02 Heidelberger Druckmasch Ag Process for controlling the temperature of the printing ink in a printing press
US5683508A (en) * 1995-08-25 1997-11-04 Fit Group, Inc. Coating apparatus and method for dispensing a liquid, and draining and cleaning a coating apparatus
US5826509A (en) * 1995-10-18 1998-10-27 Deneka; P. Kenneth Printing coating head device
US5694848A (en) * 1996-03-13 1997-12-09 Heidelberger Druckmaschinen Ag Printing unit for water based inks
US5768993A (en) * 1997-05-09 1998-06-23 Bryce International, L.L.C. Inking system for offset printers
US5927189A (en) * 1997-12-30 1999-07-27 Kimberly-Clark Worldwide, Inc. Method and apparatus for thermal fusing with two textured endless belts
AU2003248309B2 (en) * 1998-12-16 2004-09-02 Memjet Technology Limited A printer for incorporation into consumer electronic (CE) systems with limited access
SG116488A1 (en) * 1998-12-16 2005-11-28 Silverbrook Res Pty Ltd Printer transfer roller with internal drive motor.
US6631986B2 (en) * 1998-12-16 2003-10-14 Silverbrook Research Pty Ltd Printer transport roller with internal drive motor
AUPP773798A0 (en) * 1998-12-16 1999-01-21 Silverbrook Research Pty Ltd An image creation method and apparatus(CEP02)
US6383296B1 (en) 1999-11-22 2002-05-07 Harris & Bruno Machine Co. Chambered doctor blade with automatic cleanup and ink replacement
US6576059B2 (en) * 1999-11-22 2003-06-10 Harris & Bruno Company, Inc. Chambered doctor blade system for water-based and UV-based coatings
JP2002086886A (en) * 2000-09-08 2002-03-26 Nihon Tokkyo Kanri Co Ltd Gravure printing method for printing with water-based ink and gravure printing machine using water-based ink
DE102004042266A1 (en) * 2004-09-01 2006-03-02 Koenig & Bauer Ag Short inking system tempering method for printing machine, involves setting scanning roller to optimal and job specific temperature and setting ink to temperature of scanning roller, when ink is supplied to squeegee
US8960086B2 (en) 2009-06-26 2015-02-24 The Procter & Gamble Company Systems and methods for varying the repeat pitch distance of a substrate for use with absorbent articles

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GB566461A (en) * 1942-08-19 1945-01-01 Goss Printing Press Co Ltd Method of printing with water base and like inks
DE1908043A1 (en) * 1969-02-18 1970-09-03 Leo Keller Ink transfer for surface or relief - printing
DE1801622A1 (en) * 1968-10-07 1971-01-21 Dipl Rer Pol Leo Keller Method for controlling the mutual behavior of print carrier and printing ink, especially in gravure printing
DE1786295A1 (en) * 1968-09-13 1972-02-17 H Dipl Rer Pol Keller Leo P Process for controlling the mutual behavior of print carrier and printing ink

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Publication number Priority date Publication date Assignee Title
DE442922C (en) * 1925-08-10 1927-04-12 Maschf Augsburg Nuernberg Ag Process for treating the color before printing in gravure printing machines
GB566461A (en) * 1942-08-19 1945-01-01 Goss Printing Press Co Ltd Method of printing with water base and like inks
DE1786295A1 (en) * 1968-09-13 1972-02-17 H Dipl Rer Pol Keller Leo P Process for controlling the mutual behavior of print carrier and printing ink
DE1801622A1 (en) * 1968-10-07 1971-01-21 Dipl Rer Pol Leo Keller Method for controlling the mutual behavior of print carrier and printing ink, especially in gravure printing
DE1908043A1 (en) * 1969-02-18 1970-09-03 Leo Keller Ink transfer for surface or relief - printing

Also Published As

Publication number Publication date
JPH01317789A (en) 1989-12-22
DE3814049A1 (en) 1989-11-09
US5010817A (en) 1991-04-30
DE58908162D1 (en) 1994-09-15
EP0339409B1 (en) 1994-08-10
JP2806968B2 (en) 1998-09-30
EP0339409A3 (en) 1991-08-07

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