EP0620115B1 - In-line coating device in printing machines - Google Patents

In-line coating device in printing machines Download PDF

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Publication number
EP0620115B1
EP0620115B1 EP94103832A EP94103832A EP0620115B1 EP 0620115 B1 EP0620115 B1 EP 0620115B1 EP 94103832 A EP94103832 A EP 94103832A EP 94103832 A EP94103832 A EP 94103832A EP 0620115 B1 EP0620115 B1 EP 0620115B1
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EP
European Patent Office
Prior art keywords
unit
printing
print unit
coating
varnishing
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Revoked
Application number
EP94103832A
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German (de)
French (fr)
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EP0620115A1 (en
Inventor
Georg Hartung
Ulrich Dr. Jung
Jürgen Schneider
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Manroland AG
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MAN Roland Druckmaschinen AG
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Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
    • B41F7/06—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs for printing on sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/08—Print finishing devices, e.g. for glossing prints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the invention relates to a device for coating substrates in multi-color offset printing machines with several coating units (see e.g. DE-A-3941571).
  • An application for high-viscosity, oil-containing or low-viscosity water-soluble layers is known from DE 3 906 648 A1.
  • This application unit is designed as a coating device, optionally as an offset, letterpress or gravure unit.
  • the statements are based on a structured scoop roller which corresponds to a doctor blade or an application roller and a structured forme cylinder which corresponds to a doctor blade.
  • the high-pressure unit consists of a scoop roller profiled with a cup, to which a doctor blade is assigned, a transfer roller, to which smoothing rollers are assigned, and a forme cylinder with a high-pressure mold.
  • a so-called chamber doctor blade for applying a coating composition to a coating roller is known. At least two doctor blades lying against a roller form a chamber for receiving a mass which is supplied under pressure.
  • the object of the invention is to further develop a coating device of the type known, for example, from document DE-A-3941571, in order to easily process inline processing of rapidly evaporating, aqueous printing inks / printing varnishes with a high pigment content or coarse pigments combined with further processing printing or coating processes.
  • the solution according to the invention makes it possible to carry out the inline coating with higher-viscosity liquids in an offset printing machine, with particular attention to water-based paints or pigmented paints (metallic gloss prints). Areas of application exist for recessed painting (spot painting) or full-area painting. Due to the closed chamber in the chamber doctor blade, the evaporation of the liquid used is reduced. This improves the processing of quickly evaporating, eg water-soluble liquids.
  • the combination of several offset printing units and at least one flexographic printing unit can be carried out in different arrangements, with a further coating device, for example for full-surface coating, generally being arranged downstream of these devices.
  • FIG. 1 shows a multicolor offset printing machine with two coating devices.
  • the offset printing machine (here without feeder and delivery) consists of five printing units 1 to 5, connected to it in the sheet travel direction a coating device equipped as a flexographic printing unit 6 and a conventional coating unit 7 arranged downstream of it Subsequent painting unit 7 are used for full-surface surface finishing.
  • the flexographic printing unit 6 and the coating unit 7 each consist of a printing cylinder 8.1, 8.2, a transfer drum 9.1, 9.2 and a forme cylinder 10.1, 10.2.
  • a flexible high-pressure plate is clamped onto the forme cylinder 10.1, for example. a flexographic printing plate.
  • an applicator roller 11 with a structured surface is arranged with halftone cups, a so-called anilox roller.
  • a chambered doctor blade 12 is assigned to the applicator roller 11.
  • the doctor blade 12 can, for example. be provided in the middle with a liquid inlet and two escaping liquid outlets in the area of the side parts.
  • the liquid inlet is connected to a feed pump, while the liquid outlets 11 are connected to a suction pump.
  • the pumps are required in order, for example, to pigment highly viscous liquids e.g. water-based, e.g. Gold and silver printing ink, opaque white or lacquer to be able to process.
  • the coating material for coloring the high pressure form on the forme cylinder is applied via the grid cups of the applicator roller 11 10.1 transported and applied to the printing material fed from the printing cylinder 8.1.
  • the chamber doctor blade 12 ensures that the liquid remains exclusively in the grid cups.
  • the painting unit 7 in contrast, has a pair of rollers to form a metering gap.
  • a metering roller 13 is placed against an applicator roller 14.
  • the coating composition is introduced directly into the gap between the two rollers and fed to the forme cylinder 10.2 via the application roller 14. The latter then applies them to the supplied printing material on the printing cylinder 8.2.
  • the staggered offset printing, flexographic printing and varnishing make it possible to achieve a particularly good work result, especially for metallic gloss coatings.
  • the combination of rapid processing of the easily evaporating metal printing ink or printing varnish with a subsequent, gloss-enhancing varnish coating should be emphasized.
  • FIG. 2 A comparable system is shown in Figure 2.
  • the flexographic printing unit 6 is used in front of the first printing unit 1 of the offset printing machine.
  • base coatings can be applied prior to printing, e.g. Opaque white coatings on sheet metal, plastic film or cardboard.
  • the final coating can also be made possible by arranging a coating unit 7 after the last printing unit 5 or else an integrated coating unit on a conventional printing unit.
  • An arrangement of the flexographic printing unit 6 within the offset printing machine for applying intermediate coatings, for example with a drying function, is also comparable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

The invention relates to a device for coating printing carriers in printing machines for applying water-based liquids of relatively high viscosity. The object of the invention is to develop an appropriate device for printing machines, which allows in-line processing of liquids of relatively high viscosity. The object is achieved in that a flexographic printing unit (6) is arranged upstream of a conventional varnishing unit (7). <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zum Beschichten von Bedruckstoffen in Mehrfarben-Offsetdruckmaschinen mit mehreren Lackierwerken (siehe z.B. DE-A-3941571).The invention relates to a device for coating substrates in multi-color offset printing machines with several coating units (see e.g. DE-A-3941571).

In der Zeitschrift FlexoDruck, 2-93, Seite 42-43, ist im Artikel "Goldlackdruck löst Metall-Bronzierung ab" angegeben, daß in einer Mehrfarben-Offsetdruckmaschine mit zwei sogenannten Lacktürmen eine Goldlackfarbe verarbeitet wurde. Dazu wurde ein Lackturm als Flexodruckwerk umgerüstet, wobei mit konventioneller Lackiertechnik eine Flexodruckplatte zum Beschichten eingesetzt wurde. Gegenüber der konventionellen Lackdosierung wurde auf die Option zur Verwendung eines Kammerrakels hingewiesen.In the magazine FlexoDruck, 2-93, pages 42-43, it is stated in the article "Gold lacquer printing replaces metal bronzing" that a gold lacquer color was processed in a multi-color offset printing press with two so-called lacquer towers. For this purpose, a coating tower was converted into a flexographic printing unit, with a flexographic printing plate being used for coating with conventional coating technology. Compared to conventional lacquer dosing, the option to use a chamber doctor blade was pointed out.

Ein Auftragswerk für hochviskose, ölhaltige oder niedrigviskose wasserlösliche Schichten ist aus der DE 3 906 648 A1 bekannt. Dieses Auftragswerk ist als Lackiereinrichtung, wahlweise als Offset-, Hochdruck- oder Tiefdruckwerk ausgebildet. Die Ausführungen gehen von einer strukturierten Schöpfwalze aus, die mit einem Rakelblatt korrespondierend bzw. von einer Auftragwalze und einem strukturierten Formzylinder, der mit einem Rakelblatt korrespondiert. Das Hochdruckwerk besteht dabei aus einer mit Näpfchen profilierten Schöpfwalze, der ein Rakelblatt zugeordnet ist, einer Übertragwalze, der Glättwalzen zugeordnet sind und einem Formzylinder mit Hochdruckform.An application for high-viscosity, oil-containing or low-viscosity water-soluble layers is known from DE 3 906 648 A1. This application unit is designed as a coating device, optionally as an offset, letterpress or gravure unit. The statements are based on a structured scoop roller which corresponds to a doctor blade or an application roller and a structured forme cylinder which corresponds to a doctor blade. The high-pressure unit consists of a scoop roller profiled with a cup, to which a doctor blade is assigned, a transfer roller, to which smoothing rollers are assigned, and a forme cylinder with a high-pressure mold.

Aus der DE 4 122 990 A1 sind eine Bronze- und Effektdruckfarbe und ein Verfahren zur Herstellung eines Bronze- und Effektdruckes bekannt. Dort wird eine wasserverdünnbare Druckfarbe mit hoher Viskosität und hohem Pigmentanteil beschrieben. Diese soll aus dem Lackwerk einer Offsetmaschine oder einem Flexodruckwerk verarbeitet werden. Als Vorteil wird der kurze Verarbeitungsweg mit wenigen Farbspaltungen angegeben.DE 4 122 990 A1 describes a bronze and effect printing ink and a method for producing a bronze and effect printing known. A water-thinnable printing ink with a high viscosity and high pigment content is described there. This is to be processed from the coating unit of an offset machine or a flexographic printing unit. The short processing path with few color splits is given as an advantage.

Beispielsweise aus der DE 3 614 582 A1 ist ein sogenanntes Kammerrakel zum Auftragen einer Beschichtungsmasse auf eine Beschichtungswalze bekannt. Mindestens zwei, an einer Walze anliegende, Rakelblätter bilden eine Kammer zur Aufnahme einer Masse, die unter Druck zugeführt wird.For example, from DE 3 614 582 A1, a so-called chamber doctor blade for applying a coating composition to a coating roller is known. At least two doctor blades lying against a roller form a chamber for receiving a mass which is supplied under pressure.

Aufgabe der Erfindung ist es, eine Beschichtungseinrichtung der z.B. aus dem Dokument DE-A-3941571 bekannten Art weiterzuentwickeln, um auf einfache Weise eine problemlose Inline-Verarbeitung von schnellverdunstenden, wäßrigen Druckfarben/Drucklacken mit hohem Pigmentanteil bzw. groben Pigmenten kombiniert mit weiterbehandelnden Druck- oder Beschichtungsvorgängen zu ermöglichen.The object of the invention is to further develop a coating device of the type known, for example, from document DE-A-3941571, in order to easily process inline processing of rapidly evaporating, aqueous printing inks / printing varnishes with a high pigment content or coarse pigments combined with further processing printing or coating processes.

Gelöst wird die Aufgabe durch die Merkmale des Hauptanspruches. Weiterbildungen ergeben sich aus den Unteransprüchen.The task is solved by the features of the main claim. Further training results from the subclaims.

Die erfindungsgemäße Lösung gestattet es, das Inline-Beschichten mit höherviskosen Flüssigkeiten in einer Offsetdruckmaschine vorzunehmen unter besonderer Berücksichtigung von Lacken bzw. pigmentierten Farben auf Wasserbasis (Metallglanzdrucke). Einsatzgebiete bestehen für ausgespartes Lackieren (Spotlackierung) oder vollflächiges Lackieren. Aufgrund der geschlossenen Kammer beim Kammerrakel wird die Verdunstung der verwendeten Flüssigkeit reduziert. Dadurch wird die Verarbeitung von schnell verdunstenden, z.B. wasserlöslichen Flüssigkeiten verbessert. Die Kombination von mehreren Offsetdruckwerken und mindestens einem Flexodruckwerk kann in unterschiedlichen Anordnungen erfolgen, wobei diesen Einrichtungen in der Regel eine weitere Lackiereinrichtung, z.B. zum vollflachigen Lackieren, nachgeordnet ist.The solution according to the invention makes it possible to carry out the inline coating with higher-viscosity liquids in an offset printing machine, with particular attention to water-based paints or pigmented paints (metallic gloss prints). Areas of application exist for recessed painting (spot painting) or full-area painting. Due to the closed chamber in the chamber doctor blade, the evaporation of the liquid used is reduced. This improves the processing of quickly evaporating, eg water-soluble liquids. The combination of several offset printing units and at least one flexographic printing unit can be carried out in different arrangements, with a further coating device, for example for full-surface coating, generally being arranged downstream of these devices.

Die Erfindung wird im Folgenden beispielhaft erläutert. Dabei zeigt

Fig. 1
eine erste Einrichtung zum Beschichten und
Fig. 2
eine Variante der Einrichtung zum Beschichten.
The invention is explained below by way of example. It shows
Fig. 1
a first device for coating and
Fig. 2
a variant of the device for coating.

In Figur 1 ist eine Mehrfarben-Offsetdruckmaschine mit zwei Lackiereinrichtungen gezeigt. Die Offsetdruckmaschine (hier ohne An- und Ausleger) besteht aus fünf Druckwerken 1 bis 5, daran in Bogenlaufrichtung angeschlossen einer als Flexodruckwerk 6 ausgerüsteten Beschichtungseinrichtung und einer dieser nachgeordneten herkömmlichen Lackiereinheit 7. Dabei kann das Flexodruckwerk 6 als Spotlackiereinrichtung (für ausgespartes Lackieren) und die nachgeordnete Lackiereinheit 7 zum vollflächigen Oberflächenfinishing eingesetzt werden.FIG. 1 shows a multicolor offset printing machine with two coating devices. The offset printing machine (here without feeder and delivery) consists of five printing units 1 to 5, connected to it in the sheet travel direction a coating device equipped as a flexographic printing unit 6 and a conventional coating unit 7 arranged downstream of it Subsequent painting unit 7 are used for full-surface surface finishing.

Die Flexodruckwerk 6 wie auch die Lackiereinheit 7 bestehen aus je einem Druckzylinder 8.1, 8.2, einer Transfertrommel 9.1, 9.2 und einem Formzylinder 10.1, 10.2.The flexographic printing unit 6 and the coating unit 7 each consist of a printing cylinder 8.1, 8.2, a transfer drum 9.1, 9.2 and a forme cylinder 10.1, 10.2.

In dem Flexodruckwerk 6 ist auf den Formzylinder 10.1 eine flexible Hochdruckplatte aufgespannt, zB. eine Flexodruckplatte. In Kontakt mit dem Formzylinder 10.1 ist eine Auftragwalze 11 mit strukturierter Oberfläche mit Rasternäpfchen, eine sogenannte Rasterwalze, angeordnet. An die Auftragwalze 11 anstellbar ist dieser ein Kammerrakel 12 zugeordnet. Das Kammerrakel 12 kann zB. an seiner Oberseite mittig mit einem Flüssigkeitszulauf und zwei austretenden Flüssigkeitsabläufen im Bereich der Seitenteile versehen sein. Der Flüssigkeitszulauf ist mit einer Förderpumpe, die Flüssigkeitsabläufe 11 hingegen sind mit einer Saugpumpe verbunden. Die Pumpen sind erforderlich, um speziell durch die Pigmentierung höherviskose Flüssigkeit z.B. auf Wasserbasis, wie z.B. Gold- und Silberdruckfarbe, Deckweiß oder Lack, verarbeiten zu können.In the flexographic printing unit 6, a flexible high-pressure plate is clamped onto the forme cylinder 10.1, for example. a flexographic printing plate. In contact with the forme cylinder 10.1, an applicator roller 11 with a structured surface is arranged with halftone cups, a so-called anilox roller. A chambered doctor blade 12 is assigned to the applicator roller 11. The doctor blade 12 can, for example. be provided in the middle with a liquid inlet and two escaping liquid outlets in the area of the side parts. The liquid inlet is connected to a feed pump, while the liquid outlets 11 are connected to a suction pump. The pumps are required in order, for example, to pigment highly viscous liquids e.g. water-based, e.g. Gold and silver printing ink, opaque white or lacquer to be able to process.

Über die Rasternäpfchen der Auftragwalze 11 wird die Beschichtungsmasse zum Einfärben der Hochdruckform auf den Formzylinder 10.1 transportiert und auf den vom Druckzylinder 8.1 zugeführten Bedruckstoff aufgebracht. Während des von der Auftragwalze 11 bewirkten Flüssigkeitstransports sorgt die Kammerrakel 12 dafür, daß die Flüssigkeit ausschließlich in den Rasternäpfchen verbleibt.The coating material for coloring the high pressure form on the forme cylinder is applied via the grid cups of the applicator roller 11 10.1 transported and applied to the printing material fed from the printing cylinder 8.1. During the liquid transport effected by the application roller 11, the chamber doctor blade 12 ensures that the liquid remains exclusively in the grid cups.

Die Lackiereinheit 7 weist demgegenüber ein Walzenpaar zur Bildung eines Dosierspalts auf. Dabei ist eine Dosierwalze 13 an eine Auftragwalze 14 angestellt. Die Beschichtungsmasse wird direkt in den Spalt zwischen beiden Walzen eingeführt und über die Auftragwalze 14 dem Formzylinder 10.2 zugeführt. Dieser trägt sie dann am Druckzylinder 8.2 auf den zugeführten Bedruckstoff auf.The painting unit 7, in contrast, has a pair of rollers to form a metering gap. A metering roller 13 is placed against an applicator roller 14. The coating composition is introduced directly into the gap between the two rollers and fed to the forme cylinder 10.2 via the application roller 14. The latter then applies them to the supplied printing material on the printing cylinder 8.2.

Durch die Staffelung Offsetdruck, Flexodruck und Lackieren ist speziell für Metallglanz-Beschichtungen ein besonders gutes Arbeitsergebnis erzielbar. Dabei ist die Kombination von schneller Verarbeitung der leicht verdunstenden Metalldruckfarbe bzw. des Drucklacks mit einer nachträglichen, den Glanz erhöhenden Lackbeschichtung hervorzuheben.The staggered offset printing, flexographic printing and varnishing make it possible to achieve a particularly good work result, especially for metallic gloss coatings. The combination of rapid processing of the easily evaporating metal printing ink or printing varnish with a subsequent, gloss-enhancing varnish coating should be emphasized.

Ein vergleichbares System ist in Figur 2 dargestellt. Hier ist das Flexodruckwerk 6 vor dem ersten Druckwerk 1 der Offsetdruckmaschine eingesetzt. Mit einer derartigen Konfiguration lassen sich Basisbeschichtungen vor dem Drucken aufbringen, z.B. Deckweiß-Beschichtungen auf Blechmaterial, Kunststoffolie oder Karton. Die abschließende Lackierung kann weiterhin dadurch ermöglich werden, daß ein Lackierwerk 7 nach dem letzten Druckwerk 5 oder auch ein intergriertes Lackierwerk an einem konventionellen Druckwerk angeordnet ist.A comparable system is shown in Figure 2. Here, the flexographic printing unit 6 is used in front of the first printing unit 1 of the offset printing machine. With such a configuration, base coatings can be applied prior to printing, e.g. Opaque white coatings on sheet metal, plastic film or cardboard. The final coating can also be made possible by arranging a coating unit 7 after the last printing unit 5 or else an integrated coating unit on a conventional printing unit.

Vergleichbar ist auch eine Anordnung des Flexodruckwerkes 6 innerhalb der Offsetdruckmaschine zum Aufbringen von Zwischenbeschichtungen etwa mit Trocknungsfunktion.An arrangement of the flexographic printing unit 6 within the offset printing machine for applying intermediate coatings, for example with a drying function, is also comparable.

Claims (4)

  1. Device in a rotary printing press for multi-colour offset printing for coating material to be printed with at least two varnishing units, wherein each varnishing unit has an impression cylinder (8), a forme cylinder (10) and an applicator roller (11, 14), and the varnishing unit arranged upstream corresponding to the sheet running direction is constructed as a flexo print unit (6), wherein the flexo print unit (6) consists of the following elements:
    a relief forme carrying forme cylinder (10.1) which is in contact with the impression cylinder (8.1), an applicator roller (11) with a raster structure, which is in contact with the forme cylinder (10.1) and a settable-on chamber doctor (12) which is connected with a feed pump for liquid feed and a suction pump for liquid return wherein directly or indirectly arranged after the flexo print unit (6) is a varnishing unit (7) and wherein in the varnishing unit (7) an applicator roller (14) is provided relative to which a metering roller (13) is arranged to form a common metering slot.
  2. Device according to Claim 1, characterised in that the flexo print unit (6) is arranged in an offset printing press between the printing units (1-5).
  3. Device according to Claim 1, characterised in that the flexo print unit (6) is arranged in an offset printing press prior to the printing units (1-5).
  4. Device according to Claim 1, characterized in that the flexo print unit (6) is arranged in an offset printing press subsequent to the printing units (1-5).
EP94103832A 1993-04-16 1994-03-12 In-line coating device in printing machines Revoked EP0620115B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9305552 1993-04-16
DE9305552U DE9305552U1 (en) 1993-04-16 1993-04-16 Device for inline coating of printing materials in offset printing machines

Publications (2)

Publication Number Publication Date
EP0620115A1 EP0620115A1 (en) 1994-10-19
EP0620115B1 true EP0620115B1 (en) 1997-04-23

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ID=6891957

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EP94103832A Revoked EP0620115B1 (en) 1993-04-16 1994-03-12 In-line coating device in printing machines

Country Status (6)

Country Link
US (1) US5638752A (en)
EP (1) EP0620115B1 (en)
JP (2) JPH06320712A (en)
AT (1) ATE152044T1 (en)
DE (2) DE9305552U1 (en)
ES (1) ES2101375T3 (en)

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DE19807505A1 (en) * 1998-02-21 1999-08-26 Roland Man Druckmasch Rotary sheet printer for multicolored printing
DE19952204A1 (en) * 1999-10-29 2001-05-10 Roland Man Druckmasch Method for processing corrugated sheet material in rotary printers involves applying coating agent prior to printing to smooth out irregularities in sheet
DE10020648A1 (en) * 2000-04-27 2001-10-31 Heidelberger Druckmasch Ag Sheet-fed printer has sheet-separator, feeder, with marker, preliminary gripper, feeder and transporter drums, screen roller and ductor
EP0931648B1 (en) * 1998-01-23 2002-04-03 MAN Roland Druckmaschinen AG Coating device for a printing machine and relief printing plate
US6371024B1 (en) 1999-10-20 2002-04-16 Man Roland Druckmaschinen Ag Sheet-fed printing machine with cleaning system
US6443058B1 (en) 1999-03-19 2002-09-03 Heidelberger Druckmaschinen Ag Combined printing method and hybrid printing machine
DE102006051275A1 (en) * 2006-10-31 2008-05-08 Man Roland Druckmaschinen Ag Finishing process for a printed product and coating unit

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JP3046079U (en) 1998-02-20
ATE152044T1 (en) 1997-05-15
US5638752A (en) 1997-06-17
ES2101375T3 (en) 1997-07-01
DE59402478D1 (en) 1997-05-28
EP0620115A1 (en) 1994-10-19
DE9305552U1 (en) 1993-06-03
JPH06320712A (en) 1994-11-22

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