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WO1998007579A1 - Pressure roller or cylinder with a metal or plastic core and a process for its production - Google Patents

Pressure roller or cylinder with a metal or plastic core and a process for its production Download PDF

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Publication number
WO1998007579A1
WO1998007579A1 PCT/EP1997/004551 EP9704551W WO9807579A1 WO 1998007579 A1 WO1998007579 A1 WO 1998007579A1 EP 9704551 W EP9704551 W EP 9704551W WO 9807579 A1 WO9807579 A1 WO 9807579A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastic
printing roller
cylinder according
cylinder
printing
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.)
Ceased
Application number
PCT/EP1997/004551
Other languages
German (de)
French (fr)
Inventor
Hans-Georg Schepers
Karl-Wilh. Saueressig
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.)
SCHEPERS DRUCKFORMTECHNIK GmbH
Original Assignee
SCHEPERS DRUCKFORMTECHNIK GmbH
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 SCHEPERS DRUCKFORMTECHNIK GmbH filed Critical SCHEPERS DRUCKFORMTECHNIK GmbH
Publication of WO1998007579A1 publication Critical patent/WO1998007579A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/16—Curved printing plates, especially cylinders
    • B41N1/22—Curved printing plates, especially cylinders made of other substances
    • 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/12—Printing plates or foils; Materials therefor non-metallic other than stone, e.g. printing plates or foils comprising inorganic materials in an organic matrix

Definitions

  • the invention relates to a pressure roller or cylinder with a core made of metal or plastic.
  • Plastic plates made of photopolymers are also known, from which printing plates can be produced by film exposure and washing out.
  • these printing plates have the disadvantage that they cannot be produced seamlessly or endlessly. In addition, they do not have sufficient stability when used in printing.
  • Known printing rollers or cylinders with ceramic surfaces can also be lasered directly, but both the application of the ceramic coating by means of plasma processes and the lasering are expensive, technically complex and slow. Furthermore, a high level of grinding effort must be made for post-processing. It is an object of the invention to provide a printing roller or a printing cylinder of the type mentioned at the outset which is easy to engrave, has a long service life and can be produced economically.
  • the core has an outer thin layer of a hard plastic, the surface of which is engraved directly by laser.
  • the plastic layer can consist of various plastics, provided that they are sufficiently hard.
  • thermosets and / or thermoplastics can be used as plastics.
  • a surface coating can be present according to claims 5 to 7.
  • Another important criterion is the small thickness of the plastic layer, which is advantageously between 40 and 200 ⁇ m and particularly preferably between 50 and 100 ⁇ m.
  • the printing roller according to the invention or the printing cylinder according to the invention has a core made of metal or plastic or consists of a composite of these materials, to which an outer thin layer of a hard plastic is applied, the surface of which is engraved directly by laser.
  • the core can be solid or sleeve-shaped.
  • thermosets and / or thermoplastics for example PTFE, PU or ABS, and others with suitable hardnesses are suitable as plastics.
  • the surface can be coated with carbon when coating with PTFE or PU.
  • a surface made of ABS can be metallized; In addition to ABS, other metallizable plastics can also be used.
  • the plastic layer is preferably applied in a small thickness between 40 and 200 ⁇ m and more preferably in a thickness between 50 and 100 ⁇ m.
  • the plastic layer can advantageously be sprayed on, it can also be poured on, or the plastic can be wound into a layer from extruded strips and then ground off to produce a smooth surface.
  • the printing roller according to the invention or the printing cylinder according to the invention is simple in construction, can be produced efficiently and has a long service life, one can speak of an ideal solution to the problems at hand.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

This invention concerns a pressure roller or pressure cylinder with a metal or plastic core, which is characterized in that the core has a thin outer layer of adhesive plastic, the surface of which is directly engraved by laser. Moreover, the invention concerns a process for producing the pressure roller or cylinder.

Description

Beschreibung:Description:

Druckwalze oder -zylinder mit einem Kern aus Metall oder Kunststoff und Verfahren zur Herstellung derselben bzw. desselbenPrinting roller or cylinder with a core made of metal or plastic and method for producing the same or the same

Die Erfindung betrifft eine Druckwalze oder einen -zylinder mit einem Kern aus Metall oder Kunststoff.The invention relates to a pressure roller or cylinder with a core made of metal or plastic.

Es ist bereits bekannt, Druckwalzen oder -zylinder für den Tiefdruck mit einem Kern aus Metall oder Kunststoff herzustellen, die eine Kupferoberfläche aufweisen, die konventionell durch Ätzung oder durch Diamantstichel graviert ist. Die Kupferoberfläche kann auch verchromt sein.It is already known to produce printing rollers or cylinders for gravure printing with a core made of metal or plastic, which have a copper surface which is conventionally engraved by etching or by diamond stylus. The copper surface can also be chrome-plated.

Es sind weiterhin Kunststoffplatten aus Photopolymeren bekannt, aus denen durch Filmbelichtung und Auswaschen Druckplatten herstellbar sind. Diese Druckplatten weisen aber den Nachteil auf, daß sie nicht nahtlos oder endlos herstellbar sind. Außerdem besitzen sie im Druckeinsatz keine ausreichende Standfestigkeit.Plastic plates made of photopolymers are also known, from which printing plates can be produced by film exposure and washing out. However, these printing plates have the disadvantage that they cannot be produced seamlessly or endlessly. In addition, they do not have sufficient stability when used in printing.

Ebenfalls bekannte Druckwalzen oder -zylinder mit keramischen Oberflächen sind zwar direkt laserbar, aber sowohl das Aufbringen der Keramikbeschichtung durch Plasmaverfahren als auch das Lasern sind teuer, technisch aufwendig und langsam. Weiterhin muß zur Nachbearbeitung ein hoher Schleifaufwand getrieben werden. Es ist Aufgabe der Erfindung, eine Druckwalze oder einen Druckzylinder der eingangs genannten Art zu schaffen, die/der einfach zu gravieren ist, hohe Standzeiten aufweist und wirtschaftlich herstellbar ist.Known printing rollers or cylinders with ceramic surfaces can also be lasered directly, but both the application of the ceramic coating by means of plasma processes and the lasering are expensive, technically complex and slow. Furthermore, a high level of grinding effort must be made for post-processing. It is an object of the invention to provide a printing roller or a printing cylinder of the type mentioned at the outset which is easy to engrave, has a long service life and can be produced economically.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Kern eine äußere dünne Schicht eines Hartkunststoffs aufweist, deren Oberfläche direkt durch Laser graviert ist. Die Kunststoffschicht kann aus verschiedenen Kunststoffen bestehen, soweit sie ausreichend hart sind.This object is achieved in that the core has an outer thin layer of a hard plastic, the surface of which is engraved directly by laser. The plastic layer can consist of various plastics, provided that they are sufficiently hard.

Allgemein können als Kunststoffe Duroplaste und/oder Thermoplaste verwendet werden.In general, thermosets and / or thermoplastics can be used as plastics.

Vorteilhafte Kunststoffe sind in den Ansprüchen 2 bis 4 angegeben.Advantageous plastics are given in claims 2 to 4.

Eine Oberflächenvergütung kann gemäß den Ansprüchen 5 bis 7 vorliegen.A surface coating can be present according to claims 5 to 7.

Ein weiteres wichtiges Kriterium ist die geringe Dicke der Kunststoffschicht, die vorteilhaft zwischen 40 und 200 μm und besonders bevorzugt zwischen 50 und 100 μm beträgt.Another important criterion is the small thickness of the plastic layer, which is advantageously between 40 and 200 μm and particularly preferably between 50 and 100 μm.

Vorteilhafte Verfahren zur Herstellung der Druckwalze gemäß der Erfindung bzw. des entsprechenden Druckzylinders sind in den Ansprüchen 10 und 11 angegeben.Advantageous methods for producing the printing roller according to the invention or the corresponding printing cylinder are specified in claims 10 and 11.

Die erfindungsgemäße Druckwalze bzw. der erfindungsgemäße Druckzylinder weist einen Kern aus Metall oder Kunststoff auf oder besteht aus einem Verbund dieser Stoffe, auf den eine äußere dünne Schicht eines harten Kunststoffs aufgebracht wird, deren Oberfläche direkt durch Laser graviert wird. Der Kern kann massiv oder hül- senförmig sein. Als Kunststoffe kommen allgemein Duroplaste und/oder Thermoplaste, z.B. PTFE, PU oder ABS sowie weitere mit geeigneten Härten in Frage.The printing roller according to the invention or the printing cylinder according to the invention has a core made of metal or plastic or consists of a composite of these materials, to which an outer thin layer of a hard plastic is applied, the surface of which is engraved directly by laser. The core can be solid or sleeve-shaped. In general, thermosets and / or thermoplastics, for example PTFE, PU or ABS, and others with suitable hardnesses are suitable as plastics.

Zur Verbesserung der Standzeit kann bei einer Beschichtung mit PTFE oder PU die Oberfläche mit Kohlenstoff beschichtet werden. Bei einer Oberfläche aus ABS kann diese metallisiert werden; außer ABS sind auch andere metallisierbare Kunststoffe verwendbar.To improve the service life, the surface can be coated with carbon when coating with PTFE or PU. A surface made of ABS can be metallized; In addition to ABS, other metallizable plastics can also be used.

Die Kunststoffschicht wird bevorzugt in einer geringen Dicke zwischen 40 und 200 μm und weiter bevorzugt in einer Dicke zwischen 50 und 100 μm aufgebracht.The plastic layer is preferably applied in a small thickness between 40 and 200 μm and more preferably in a thickness between 50 and 100 μm.

Die Kunststoffschicht kann vorteilhaft aufgespritzt werden, sie kann auch aufgegossen werden oder der Kunststoff kann aus extrudierten Streifen zu einer Schicht gewickelt und danach zur Herstellung einer glatten Oberfläche abgeschliffen werden.The plastic layer can advantageously be sprayed on, it can also be poured on, or the plastic can be wound into a layer from extruded strips and then ground off to produce a smooth surface.

Da die erfindungsgemäße Druckwalze oder der erfindungsgemäße Druckzylinder einfach aufgebaut ist, rationell hergestellt werden kann und eine hohe Standzeit aufweist, kann von einer idealen Lösung der anstehenden Probleme gesprochen werden. Since the printing roller according to the invention or the printing cylinder according to the invention is simple in construction, can be produced efficiently and has a long service life, one can speak of an ideal solution to the problems at hand.

Claims

Patentansprüche: Claims: 1. Druckwalze oder -zylinder mit einem Kern aus Metall oder Kunststoff, d a d u r c h g e k e n n z e i c h n e t , daß der Kern eine äußere dünne Schicht eines Hartkunststoffs aufweist, deren Oberfläche direkt durch Laser graviert ist.1. Printing roller or cylinder with a core made of metal or plastic, so that the core has an outer thin layer of a hard plastic, the surface of which is engraved directly by laser. 2. Druckwalze oder -zylinder nach Anspruch 1, dadurch gekennzeichnet, daß der Kunststoff Polytetrafluor- ethylen (PTFE) ist.2. Printing roller or cylinder according to claim 1, characterized in that the plastic is polytetrafluoroethylene (PTFE). 3. Druckwalze oder -zylinder nach Anspruch 1, dadurch gekennzeichnet, daß der Kunststoff Polyurethan (PU) ist.3. Printing roller or cylinder according to claim 1, characterized in that the plastic is polyurethane (PU). 4. Druckwalze oder -zylinder nach Anspruch 1, dadurch gekennzeichnet, daß der Kunststoff ein Acrylnitril- Butadien-Styrol-Copolymer (ABS) ist.4. Printing roller or cylinder according to claim 1, characterized in that the plastic is an acrylonitrile-butadiene-styrene copolymer (ABS). 5. Druckwalze oder -zylinder nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, daß die Oberfläche mit Kohlenstoff beschichtet ist.5. Printing roller or cylinder according to one of claims 2 and 3, characterized in that the surface is coated with carbon. 6. Druckwalze oder -zylinder nach Anspruch 4, dadurch gekennzeichnet, daß die Oberfläche metallisiert ist.6. Printing roller or cylinder according to claim 4, characterized in that the surface is metallized. 7. Druckwalze oder -zylinder nach Ansprüche 4, dadurch gekennzeichnet, daß die Oberfläche gehärtet ist. 7. Printing roller or cylinder according to claims 4, characterized in that the surface is hardened. 8. Druckwalze oder -zylinder nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Kunststoffschicht eine Dicke zwischen 40 und 200 μm aufweist.8. Printing roller or cylinder according to one of the preceding claims, characterized in that the plastic layer has a thickness between 40 and 200 microns. 9. Druckwalze oder -zylinder nach Anspruch 8, dadurch gekennzeichnet, daß die Kunststoffschicht eine Dicke zwischen 50 und 100 μm aufweist.9. Printing roller or cylinder according to claim 8, characterized in that the plastic layer has a thickness between 50 and 100 microns. 10. Verfahren zur Herstellung der Druckwalze oder des Druckzylinders nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Kunststoff aufgespritzt oder aufgegossen wird.10. A method for producing the printing roller or the printing cylinder according to one of claims 1 to 9, characterized in that the plastic is sprayed or poured on. 11. Verfahren zur Herstellung der Druckwalze oder des Druckzylinders nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Kunststoff aus ex- trudierten Streifen zu einer Schicht gewickelt und danach abgeschliffen wird. 11. A method for producing the printing roller or the printing cylinder according to one of claims 1 to 8, characterized in that the plastic is wound into a layer from extruded strips and then ground.
PCT/EP1997/004551 1996-08-21 1997-08-21 Pressure roller or cylinder with a metal or plastic core and a process for its production Ceased WO1998007579A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19633643.0 1996-08-21
DE1996133643 DE19633643A1 (en) 1996-08-21 1996-08-21 Printing roller or cylinder with a core made of metal or plastic and method for producing the same

Publications (1)

Publication Number Publication Date
WO1998007579A1 true WO1998007579A1 (en) 1998-02-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/004551 Ceased WO1998007579A1 (en) 1996-08-21 1997-08-21 Pressure roller or cylinder with a metal or plastic core and a process for its production

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Country Link
DE (1) DE19633643A1 (en)
WO (1) WO1998007579A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102501163A (en) * 2011-11-25 2012-06-20 郑州运城制版有限公司 Grinding method of plate rollers for gravure plate making

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19804672A1 (en) * 1998-02-06 1999-08-12 Technoplast Beschichtungsgesel Tear-proof high pressure mold
DE10033629B4 (en) * 2000-07-11 2011-12-01 Tampoprint Ag printing plate
GB0128469D0 (en) * 2001-11-28 2002-01-16 Keating Gravure Systems Uk Ltd Printing cylinder manufacture
DE102012104109A1 (en) * 2012-05-10 2013-11-14 Manroland Web Systems Gmbh Printing machine cylinder e.g. transfer cylinder, for printing element, has coating comprising plastic layer attached on mantle surface of metallic cylinder base body and metallic or ceramic material layer attached on plastic layer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125661A (en) * 1976-03-19 1978-11-14 Mona Industries, Inc. Laminated plates for chemical milling
FR2397942A1 (en) * 1977-07-19 1979-02-16 Toppan Printing Co Ltd PROCESS FOR HOLLOW PRINTING
DE2937275A1 (en) * 1978-09-15 1980-06-04 Crosfield Electronics Ltd Fine intaglio printing plate surface - where polymer covering is irradiated with ions electrons or lasers to required pattern (J5 24.3.80)
GB2223984A (en) * 1988-09-13 1990-04-25 Sony Corp Making a gravure printing plate
EP0384104A1 (en) * 1989-02-23 1990-08-29 Erminio Rossini S.P.A. Method for producing plastics cylinders for printing in general, in particular for rotogravure and flexography, and the cylinder obtained

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230431C2 (en) * 1992-09-11 1996-09-26 Roland Man Druckmasch Offset blanket sleeve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125661A (en) * 1976-03-19 1978-11-14 Mona Industries, Inc. Laminated plates for chemical milling
FR2397942A1 (en) * 1977-07-19 1979-02-16 Toppan Printing Co Ltd PROCESS FOR HOLLOW PRINTING
DE2937275A1 (en) * 1978-09-15 1980-06-04 Crosfield Electronics Ltd Fine intaglio printing plate surface - where polymer covering is irradiated with ions electrons or lasers to required pattern (J5 24.3.80)
GB2223984A (en) * 1988-09-13 1990-04-25 Sony Corp Making a gravure printing plate
EP0384104A1 (en) * 1989-02-23 1990-08-29 Erminio Rossini S.P.A. Method for producing plastics cylinders for printing in general, in particular for rotogravure and flexography, and the cylinder obtained

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102501163A (en) * 2011-11-25 2012-06-20 郑州运城制版有限公司 Grinding method of plate rollers for gravure plate making

Also Published As

Publication number Publication date
DE19633643A1 (en) 1998-03-05

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