EP0622248B1 - Plate cylinder for a printing machine - Google Patents

Plate cylinder for a printing machine Download PDF

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Publication number
EP0622248B1
EP0622248B1 EP94104753A EP94104753A EP0622248B1 EP 0622248 B1 EP0622248 B1 EP 0622248B1 EP 94104753 A EP94104753 A EP 94104753A EP 94104753 A EP94104753 A EP 94104753A EP 0622248 B1 EP0622248 B1 EP 0622248B1
Authority
EP
European Patent Office
Prior art keywords
plate cylinder
plate
printing
printing plate
cylinder
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.)
Revoked
Application number
EP94104753A
Other languages
German (de)
French (fr)
Other versions
EP0622248A1 (en
Inventor
Claus Simeth
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25925467&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0622248(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0622248A1 publication Critical patent/EP0622248A1/en
Application granted granted Critical
Publication of EP0622248B1 publication Critical patent/EP0622248B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

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
    • B41C1/18—Curved printing formes or printing cylinders
    • 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

Definitions

  • the invention relates to a plate cylinder for a printing press with a printing plate that can be clamped onto its outer surface and a friction-reducing layer provided between the printing plate and the plate cylinder.
  • a plate cylinder of the type specified is known from DE 39 36 448 C1.
  • a film arrangement with two superimposed films is provided between the printing cylinder and the printing plate, one surface of each of the two films having a smaller coefficient of sliding friction than the other surface.
  • the areas of low sliding friction are generated by a plastic coating on the foils.
  • the foils lie on top of each other with their well sliding surfaces with a lower coefficient of sliding friction and thereby enable the printing plate to be moved relative to the plate cylinder with low sliding friction. This makes it easier to clamp and adjust the printing plate on the plate cylinder.
  • this known design of the plate cylinder it is disadvantageous that the application of the foils makes handling when changing the printing plate difficult. Furthermore, the heat dissipation from the pressure plate to the plate cylinder worsened by the two foils and accordingly reduced the temperature resistance.
  • a pre-coated printing plate is known from EP 0 528 395 A1, which has a coating on its rear side.
  • a lubricant can also be added to the coating.
  • the invention is based on the object of improving the handling and temperature resistance in a plate cylinder of the type mentioned.
  • the object is achieved in that the surface of the plate cylinder and the underside of the printing plate are coated with a sliding material.
  • the layer thickness of the sliding material is preferably approximately 10 ⁇ m.
  • Thermosets, thermoplastics and inorganic dry lubricants come into consideration as sliding materials.
  • the sliding materials can be burned into the surface of the plate cylinder or the printing plate at a temperature of approximately 200 ° C. It is also possible to connect the sliding material to the plate cylinder or the printing plate by means of a carrier layer as an adhesion promoter.
  • the printing plate lies directly on the plate cylinder.
  • the layers of sliding material have a layer thickness that is many times smaller than that of the known foils, and thereby enable considerably better heat dissipation via the plate cylinder.
  • the direct support of the printing plate on the plate cylinder also contributes to less deformation of the printing plate and thus to a higher dimensional accuracy.
  • friction coefficients between 0.04 for molybdenum disulfide or PTFE and 0.3 for boron nitride can be achieved, whereby a layer thickness of 10 ⁇ m or even less is usually sufficient.
  • the carrier surface is pretreated by blasting or anodic / chemical conversion.
  • the reduction in friction between the printing plate and the plate cylinder achieved with the coating according to the invention makes it easier to move the printing plate relative to the plate cylinder, so that the tensioning and adjustment of the printing plate on the printing cylinder can be carried out more easily and precisely.

Abstract

In a plate cylinder for a printing machine having a printing plate which can be mounted on its outer surface, the surface of the plate cylinder and/or the underside of the printing plate is coated with a sliding material which forms a friction-reducing layer between the printing plate and the plate cylinder.

Description

Die Erfindung betrifft einen Plattenzylinder für eine Druckmaschine mit einer auf seine Mantelfläche aufspannbaren Druckplatte und einer zwischen Druckplatte und Plattenzylinder vorgesehenen, reibungsvermindernden Schicht.The invention relates to a plate cylinder for a printing press with a printing plate that can be clamped onto its outer surface and a friction-reducing layer provided between the printing plate and the plate cylinder.

Ein Plattenzylinder der angegebenen Art ist bekannt aus der DE 39 36 448 C1. Bei dem bekannten Plattenzylinder ist zwischen dem Druckzylinder und der Druckplatte eine Folienanordnung mit zwei übereinandergelegten Folien vorgesehen, wobei jeweils eine Fläche der beiden Folien einen kleineren Gleitreibungskoeffizienten als die andere Fläche hat. Die Flächen geringer Gleitreibung werden hierbei durch eine Kunststoffbeschichtung der Folien erzeugt. Die Folien liegen mit ihren gut gleitenden Flächen mit kleinerem Gleitreibungskoeffizienten aufeinander und ermöglichen dadurch ein Verschieben der Druckplatte relativ zum Plattenzylinder mit geringer Gleitreibung. Hierdurch wird das Spannen und Justieren der Druckplatte auf dem Plattenzylinder erleichtert. Bei dieser bekannten Ausgestaltung des Plattenzylinders ist von Nachteil, daß das Auflegen der Folien die Handhabung beim Wechsel der Druckplatte erschwert. Weiterhin wird die Wärmeableitung von der Druckplatte zum Plattenzylinder durch die beiden Folien verschlechtert und dementsprechend die Temperaturbelastbarkeit reduziert.A plate cylinder of the type specified is known from DE 39 36 448 C1. In the known plate cylinder, a film arrangement with two superimposed films is provided between the printing cylinder and the printing plate, one surface of each of the two films having a smaller coefficient of sliding friction than the other surface. The areas of low sliding friction are generated by a plastic coating on the foils. The foils lie on top of each other with their well sliding surfaces with a lower coefficient of sliding friction and thereby enable the printing plate to be moved relative to the plate cylinder with low sliding friction. This makes it easier to clamp and adjust the printing plate on the plate cylinder. In this known design of the plate cylinder it is disadvantageous that the application of the foils makes handling when changing the printing plate difficult. Furthermore, the heat dissipation from the pressure plate to the plate cylinder worsened by the two foils and accordingly reduced the temperature resistance.

Aus der EP 0 528 395 A1 ist eine vorbeschichtete Druckplatte bekannt, die auf ihrer Rückseite eine Beschichtung aufweist. Der Beschichtung kann auch ein Gleitmittel zugesetzt werden.A pre-coated printing plate is known from EP 0 528 395 A1, which has a coating on its rear side. A lubricant can also be added to the coating.

Der Erfindung liegt die Aufgabe zu Grunde, die Handhabung und Temperaturbelastbarkeit bei einem Plattenzylinder der eingangs genannten Art zu verbessern.The invention is based on the object of improving the handling and temperature resistance in a plate cylinder of the type mentioned.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Oberfläche des Plattenzylinders und die Unterseite der Druckplatte mit einem Gleitwerkstoff beschichtet sind. Die Schichtdicke des Gleitwerkstoffs beträgt hierbei Vorzugsweise ca. 10 µm. Als Gleitwerkstoffe kommen Duroplaste, Thermoplaste und anorganische Trockenschmierstoffe in Betracht. Die Gleitwerkstoffe können erfindungsgemäß in die Oberfläche des Plattenzylinders bzw. der Druckplatte bei einer Temperatur von ca. 200° C eingebrannt werden. Ebenso ist es möglich, den Gleitwerkstoff mittels einer Trägerschicht als Haftvermittler mit dem Plattenzylinder bzw. der Druckplatte zu verbinden.The object is achieved in that the surface of the plate cylinder and the underside of the printing plate are coated with a sliding material. The layer thickness of the sliding material is preferably approximately 10 μm. Thermosets, thermoplastics and inorganic dry lubricants come into consideration as sliding materials. According to the invention, the sliding materials can be burned into the surface of the plate cylinder or the printing plate at a temperature of approximately 200 ° C. It is also possible to connect the sliding material to the plate cylinder or the printing plate by means of a carrier layer as an adhesion promoter.

Bei der erfindungsgemäßen Ausgestaltung des Plattenzylinders einer Druckmaschine liegt die Druckplatte unmittelbar auf dem Plattenzylinder auf. Das Auflegen zusätzlicher Folien entfällt, wodurch die Handhabung wesentlich vereinfacht wird. Die Schichten aus Gleitwerkstoff haben verglichen mit den bekannten Folien eine um ein Vielfaches geringere Schichtdicke und ermöglichen dadurch eine erheblich bessere Wärmeableitung über den Plattenzylinder. Die unmittelbare Abstützung der Druckplatte auf dem Plattenzylinder trägt weiterhin zu einer geringeren Verformung der Druckplatte und damit zu einer höheren Formgenauigkeit bei.In the embodiment of the plate cylinder of a printing press according to the invention, the printing plate lies directly on the plate cylinder. There is no need to put on additional foils, which considerably simplifies handling. The layers of sliding material have a layer thickness that is many times smaller than that of the known foils, and thereby enable considerably better heat dissipation via the plate cylinder. The direct support of the printing plate on the plate cylinder also contributes to less deformation of the printing plate and thus to a higher dimensional accuracy.

Die im folgenden aufgeführten Gleitwerkstoffe sind für eine Beschichtung der Mantelfläche des Plattenzylinders und der Auflagefläche der Druckplatte besonders geeignet:

1. Duroplaste
Alkyd-Melaminharzlacke
Polyester-Kombinationen
hitzehärtende Acrylatprodukte
Aethoxylinharz-Lacke
Silikonmodifizierte Kombinationen
2. Thermoplaste
Polyvinylchlorid
Polyvinylchlorid-Mischpolymerisat
Polyvinylfluorid
Polytetrafluoretylen
3. Anorganische Stoffe:
Graphit
Molybdändisulfid
Bornitrid
The sliding materials listed below are particularly suitable for coating the outer surface of the plate cylinder and the contact surface of the pressure plate:
1. Thermosets
Alkyd melamine resin paints
Polyester combinations
thermosetting acrylic products
Aethoxylin resin varnishes
Silicone modified combinations
2. Thermoplastics
Polyvinyl chloride
Polyvinyl chloride copolymer
Polyvinyl fluoride
Polytetrafluoroethylene
3. Inorganic substances:
graphite
Molybdenum disulfide
Boron nitride

Mit den aufgeführten Gleitwerkstoffen lassen sich Reibbeiwerte zwischen 0,04 für Molybdändisulfid oder PTFE und 0,3 für Bornitrid erreichen, wobei eine Schichtdicke von 10 µm oder sogar darunter in der Regel ausreichend ist. Vor der Beschichtung wird die Trägerfläche durch Strahlen bzw. anodische / chemische Konversion vorbehandelt. Für eine druckereiintern anzuwendende Beschichtung ist das Aufkleben einer Schmierstoffträgerschicht auf die Druckplatte bzw. den Plattenzylinder möglich.With the listed sliding materials, friction coefficients between 0.04 for molybdenum disulfide or PTFE and 0.3 for boron nitride can be achieved, whereby a layer thickness of 10 µm or even less is usually sufficient. Before the coating, the carrier surface is pretreated by blasting or anodic / chemical conversion. For a coating to be used in-house, it is possible to glue a lubricant carrier layer to the printing plate or the plate cylinder.

Durch die mit der erfindungsgemäßen Beschichtung erzielte Verminderung der Reibung zwischen Druckplatte und Plattenzylinder wird das Verschieben der Druckplatte relativ zum Plattenzylinder erleichtert, so daß das Spannen und Justieren der Druckplatte auf dem Druckzylinder einfacher und genauer durchführbar ist.The reduction in friction between the printing plate and the plate cylinder achieved with the coating according to the invention makes it easier to move the printing plate relative to the plate cylinder, so that the tensioning and adjustment of the printing plate on the printing cylinder can be carried out more easily and precisely.

Claims (4)

  1. Plate cylinder for a printing press with a printing plate which can be tensioned on its cover surface, which has a layer arranged on its rear side, characterized in that the surface of the plate cylinder and the underside of the printing plate are coated with a lubricant material.
  2. Plate cylinder according to Claim 1, characterised in that the layer thickness of the lubricant material amounts to ca. 10 µm.
  3. Plate cylinder according to one of Claims 1 or 2, characterized in that the lubricant material can be baked in to the surface of the plate cylinder or the underside of the printing plate.
  4. Plate cylinder according to one of Claims 1 to 3, characterized in that the lubricant material is connected via a carrier layer with the plate cylinder or the printing plate.
EP94104753A 1993-04-30 1994-03-25 Plate cylinder for a printing machine Revoked EP0622248B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4314398 1993-04-30
DE4314398 1993-04-30
DE9307099U 1993-05-07
DE9307099 1993-05-07

Publications (2)

Publication Number Publication Date
EP0622248A1 EP0622248A1 (en) 1994-11-02
EP0622248B1 true EP0622248B1 (en) 1996-12-27

Family

ID=25925467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104753A Revoked EP0622248B1 (en) 1993-04-30 1994-03-25 Plate cylinder for a printing machine

Country Status (5)

Country Link
US (1) US6209455B1 (en)
EP (1) EP0622248B1 (en)
JP (1) JP2766183B2 (en)
AT (1) ATE146725T1 (en)
DE (1) DE59401376D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19526703A1 (en) * 1995-07-24 1997-02-20 Pms Graphischer Service Gmbh Method of producing printing plate underlay to fit plate cylinders

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295259B1 (en) * 2002-10-11 2012-07-18 Day International, Inc. Printing blanket and method for reducing corrosion and abrasion of printing blankets and blanket cylinders
JP2005035003A (en) * 2003-07-15 2005-02-10 Konica Minolta Medical & Graphic Inc Block copy sheet material, method for imposing printing plate, and method for printing
US7422840B2 (en) * 2004-11-12 2008-09-09 E.I. Du Pont De Nemours And Company Apparatus and process for forming a printing form having a cylindrical support
DE102006038798A1 (en) * 2006-07-31 2008-02-07 Heidelberger Druckmaschinen Ag Film transfer unit with material applicator
ITMI20082225A1 (en) * 2008-12-16 2010-06-17 Rossini S P A ADAPTER SLEEVE FOR HIGH RIGIDITY PRINTING CYLINDERS

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791644A (en) * 1972-12-14 1974-02-12 H Demoore Sheet handling apparatus
JPS5638291A (en) * 1979-09-06 1981-04-13 Yoshida Kogyo Kk <Ykk> Method of forming rigid print film on substrate
JPS5642679A (en) * 1979-09-14 1981-04-20 Kunio Mori Plate cylinder device in rotary printer
US4402267A (en) * 1981-03-11 1983-09-06 Printing Research Corporation Method and apparatus for handling printed sheet material
JPS6389185A (en) * 1986-09-30 1988-04-20 長谷川刃物株式会社 Scissors
DE3714327A1 (en) * 1987-04-29 1988-11-17 Boettcher Gmbh & Co Felix Metal body for ink transfer and metering in printing units
DE3936448C1 (en) 1989-11-02 1991-04-18 Miller-Johannisberg Druckmaschinen Gmbh, 6222 Geisenheim, De
JPH0739162B2 (en) * 1991-06-13 1995-05-01 株式会社淀川製鋼所 Vinyl chloride decorative metal plate and method for producing the same
EP0528395B1 (en) * 1991-08-19 1997-06-18 Fuji Photo Film Co., Ltd. Presensitized plate for use in making lithographic printing plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19526703A1 (en) * 1995-07-24 1997-02-20 Pms Graphischer Service Gmbh Method of producing printing plate underlay to fit plate cylinders
DE19526703C2 (en) * 1995-07-24 1999-08-19 Saechsisches Inst Fuer Die Dru Process for the production of underlays for printing plates on plate cylinders

Also Published As

Publication number Publication date
DE59401376D1 (en) 1997-02-06
EP0622248A1 (en) 1994-11-02
JPH0747782A (en) 1995-02-21
JP2766183B2 (en) 1998-06-18
US6209455B1 (en) 2001-04-03
ATE146725T1 (en) 1997-01-15

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