EP0384104B1 - Verfahren zur Herstellung von Kunststoffzylindern zum Drucken, insbesondere zum Rakeltiefdruck und Flexodruck und der so erhaltene Zylinder - Google Patents

Verfahren zur Herstellung von Kunststoffzylindern zum Drucken, insbesondere zum Rakeltiefdruck und Flexodruck und der so erhaltene Zylinder Download PDF

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Publication number
EP0384104B1
EP0384104B1 EP90100253A EP90100253A EP0384104B1 EP 0384104 B1 EP0384104 B1 EP 0384104B1 EP 90100253 A EP90100253 A EP 90100253A EP 90100253 A EP90100253 A EP 90100253A EP 0384104 B1 EP0384104 B1 EP 0384104B1
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EP
European Patent Office
Prior art keywords
layer
tube
inner tube
expanded material
expanded
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
EP90100253A
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English (en)
French (fr)
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EP0384104A1 (de
Inventor
Felice Rossini
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.)
Erminio Rossini SpA
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Erminio Rossini SpA
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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
    • B41C1/18—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
    • 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

Definitions

  • This present invention relates to a method for producing plastics cylinders as described in the preamble of the main claim.
  • the patent also relates to the cylinder obtained by said method.
  • NL-A-8 302 811 describes a pressure or printing cylinder comprising a core cylinder, a layer of flexible material around such a cylinder, a shell located around the layer and carrying a plurality of clichés or print forms (print moulds).
  • the core cylinder has shaft-trunnions on which bearings and a drive-toothed wheel are mounted. All these parts are made of non-deformable material such as metal or synthetic material.
  • the layer around the core is made of slightly flexible material such as foam like a material, e.g. polyurethane foam with open cells; the layer is connected to the core by means of a glue.
  • the shell around the layer is made of not deformable material such as metal or synthetic material. It supports the print forms made of rubber elastic material or photopolymeric material, said print forms are joined to the shell by means of double-sided glue tape.
  • the shell is not connected to the synthetic foam layer but is tightly arranged around it with a slight contact pressure and is kept in place by means of friction forces which generate during the use of the pressure cylinder.
  • the prior solution has many drawbacks.
  • it has a plurality of parts (core, layer, shell) separated each other in a very well defined way and this can cause dangerous relative movements between the parts during the use of the cylinder which are detrimental to the quality of printing.
  • An object of the present invention is to provide a method for producing cylinders for printing in general, and in particular rotogravure and flexography, which is very simple to implement using any suitable apparatus.
  • a further object is to provide a method of the aforesaid type which enables plastics printing cylinders to be produced which are of maximum reliability and low weight, so that they can be easily handled and stored.
  • a further object is to provide a method which enables a plastics printing cylinder to be produced, the diameter of which can be varied at will during its production, without encountering particular difficulty.
  • a glass fibre fabric or yarn impregnated with epoxy resin is wound about a perfectly cylindrical steel mandrel having a ground, lapped and chromium-plated surface, until a thickness of between 1.5 and 2 mm is obtained.
  • the structure is then polymerized in conventional manner at a temperature of between 80° C and 120° C.
  • the resultant tube is then mounted on the central shaft of a casting mould consisting of a cylinder in which said shaft is centrally positioned and which has its inner surface perfectly ground and lapped.
  • the mould is tightly closed and a quantity of polyurethane is introduced such that the final expanded product will have a density of 0,480 kg/dm3, said polyurethan being prepared by mixing isocyanate and polyol in stoichiometric proportion in a mixing machine.
  • Both the components and the mould are temperature-controlled at 20-35° C, and preferably at 30° C.
  • the structure obtained can be made electrically conductive by applying a silver or nickel-based paint by spray or brush to a thickness of 200 ⁇ c. Copper is then applied in an electroplating tank to a thickness sufficient to enable the required engraving of the cylinder surface to be effected, this thickness being advantageously 500 ⁇ C.
  • the thickness of the expanded polyurethane layer can be varied according to requirements without varying the dimensions of the internal tube, to enable cylinders of variable outer diameter to be mounted on the same standard support shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Printing Methods (AREA)
  • Ink Jet (AREA)
  • Laminated Bodies (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (7)

  1. Verfahren zum Herstellen von Kunststoffzylindern zum Drucken, von dem Typ mit einem inneren Zylindrischen Kern oder Rohr aus nicht deformierbarem Material, einer Zwischenschicht aus flexiblen Materialien wie expandierten Material, die um den Kern angeordnet ist, und einer äußeren Lage oder Schale, wobei die Zylinder insbesondere für Tiefdruck und Flexodruck sind, gekennzeichnet durch die folgenden Schritte:
    a) Fertigen des inneren Rohrs durch Winden eines mit Epoxidharz imprägnierten Glas- oder Kohlenstoffgarns oder -textilerzeugnisses um einen zylindrischen Stahldorn mit einer geschliffenen und feingeschliffenen Oberfläche, bis eine Dicke zwischen 1,5 und 2 mm erreicht ist, wobei die Struktur dann auf herkömmliche Weise bei einer Temperatur zwischen 80°C und 120°C polymerisiert wird;
    b) Beschichten des inneren Rohres mit expandiertem Material, wobei die Beschichtung durch Anordnen des Rohres auf dem zentralen Schaft einer Gießform, die einen Zylinder aufweist, in dem der Schaft zentral positioniert ist, und die eine perfekt geschliffene und feingeschliffene innere Oberfläche hat, erhalten wird, wobei die Form dicht geschlossen und eine Quantität von expandierendem Material, geeigneterweise Polyurethan, eingeführt wird, wobei das letztere innig mit dem inneren Rohr in Verbindung tritt;
    c) Auftragen eines elektrisch leitenden Anstrichs auf die Lage aus expandiertem Material oder Zwischenschicht; und
    d) galvanisches Überziehen der Zwischenschicht durch den elektrisch leitenden Anstrich mit einer gravierbaren Oberfläche, um so die äußere Lage oder Schale zu definieren, wobei das innere Rohr, die Zwischenschicht und die äußere Lage einen im wesentlichen einstückigen Körper definieren.
  2. Verfahren nach Anspruch 1, wobei die Zwischenschicht eine Dichte von 0,480 kg/dm³ hat.
  3. Verfahren nach Anspruch 1, wobei das innere Rohr, das expandierende Material und die Form bei 20-35°C, und vorzugsweise bei 30°C, temperaturgeregelt sind.
  4. Verfahren nach Anspruch 1, wobei die Struktur, die das innig verbundene innere Rohr und die Lage aus expandiertem Material aufweist, auf perfekte Zylindrizität überprüft wird und, falls erforderlich, geschliffen wird, bis die korrekte Geometrie erreicht ist.
  5. Verfahren nach Anspruch 1, wobei die Auftragung des elektrisch leitenden Anstrichs durch Sprühen oder Streichen auf die Lage aus expandiertem Material durchgeführt wird.
  6. Verfahren nach Anspruch 1, wobei die Verbindung der gravierbaren, Oberfläche mit der Lage aus expandiertem Material gemäß per se bekannten galvanischen Prozessen durch Aufbringen der Oberfläche in einem Galvanistertank erhalten wird.
  7. Zylinder zum Drucken, insbesondere für Tiefdruck und Flexographie, erhalten gemäß dem in Anspruch 1 beanspruchten Verfahren, gekennzeichnet durch ein aus Glas- oder Kohlenstoffgarn oder -textilerzeugnis hergestelltes inneres zylindrisches Rohr, eine mit dem Rohr verbundene Lage aus expandiertem Kunststoffmaterial und eine mit der Lage verbundene gravierbare Oberfläche, wobei das Rohr, die Lage und die Oberfläche innig miteinander verbunden sind, um so einen im wesentlichen einstückigen Körper zu definieren.
EP90100253A 1989-02-23 1990-01-08 Verfahren zur Herstellung von Kunststoffzylindern zum Drucken, insbesondere zum Rakeltiefdruck und Flexodruck und der so erhaltene Zylinder Expired - Lifetime EP0384104B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8919541A IT1228855B (it) 1989-02-23 1989-02-23 Procedimento per l'ottenimento di cilindri in materiale plastico per stampa in genere, in particolare rotocalco e flessografia, e cilindro cosi' ottenuto.
IT1954189 1989-02-23

Publications (2)

Publication Number Publication Date
EP0384104A1 EP0384104A1 (de) 1990-08-29
EP0384104B1 true EP0384104B1 (de) 1994-09-21

Family

ID=11158901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100253A Expired - Lifetime EP0384104B1 (de) 1989-02-23 1990-01-08 Verfahren zur Herstellung von Kunststoffzylindern zum Drucken, insbesondere zum Rakeltiefdruck und Flexodruck und der so erhaltene Zylinder

Country Status (9)

Country Link
EP (1) EP0384104B1 (de)
JP (1) JPH02248291A (de)
AT (1) ATE111805T1 (de)
AU (1) AU622809B2 (de)
CA (1) CA2009087A1 (de)
DE (1) DE69012605T2 (de)
DK (1) DK0384104T3 (de)
ES (1) ES2063170T3 (de)
IT (1) IT1228855B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345864A (en) * 1991-09-25 1994-09-13 Sulzer-Escher Wyss Ag Printing cylinder of a rotary printing press and a method for use therewith
DE19545597A1 (de) * 1995-12-06 1997-06-12 Polywest Kunststofftechnik Hülse für Druck- oder Rasterwalzen
EP0787597A2 (de) 1996-01-31 1997-08-06 POLYWEST KUNSTSTOFFTECHNIK Saueressig & Partner GmbH & Co. KG Hülse für eine Tiefdruckwalze, Verfahren zu ihrer Herstellung und Arbeitsverfahren der Vorrichtung zur Herstellung
US5735206A (en) * 1995-03-20 1998-04-07 Erminio Rossini, Spa Deformable mandrels for rotary printing cylinders
US5782181A (en) * 1995-03-14 1998-07-21 Erminio Rossini S.P.A. Concentric double sleeve for a rotary printing cylinder
US5819657A (en) * 1996-03-11 1998-10-13 Ermino Rossini, Spa Air carrier spacer sleeve for a printing cylinder

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2059222B1 (es) * 1991-07-01 1995-10-01 Nacional Moneda Timbre Mejoras introducidas en sistemas de reproduccion de grabados originales.
DE19633643A1 (de) * 1996-08-21 1998-03-05 Schepers Druckformtechnik Gmbh Druckwalze oder -zylinder mit einem Kern aus Metall oder Kunststoff und Verfahren zur Herstellung derselben bzw. desselben
JP4179752B2 (ja) * 1999-04-07 2008-11-12 ハイパーラスト、リミテッド 改良型グラビア印刷ローラ
GB0128469D0 (en) * 2001-11-28 2002-01-16 Keating Gravure Systems Uk Ltd Printing cylinder manufacture
EP1543962B1 (de) * 2003-12-19 2006-11-29 Fischer & Krecke Gmbh & Co. Tiefdruckzylinder
WO2007132734A1 (ja) * 2006-05-11 2007-11-22 Think Laboratory Co., Ltd. グラビア製版ロール及びその製造方法
DE202008009068U1 (de) * 2008-04-07 2008-09-18 Sächsische Walzengravur GmbH Tiefdruck- oder Prägeform als Sleeve oder Zylinder
EP2202084A1 (de) * 2008-12-22 2010-06-30 Müller Martini Holding AG Walze für eine Druckmaschine, Druckmaschine mit der Walze sowie Verfahren zum Herstellen der Walze
DE102009007678B4 (de) 2009-02-03 2010-12-16 Sächsische Walzengravur GmbH Hülse als Tiefdruckform
DE102009009919A1 (de) 2009-02-18 2010-08-19 Sächsische Walzengravur GmbH Tiefdruckform als Sleeve oder Zylinder und Verfahren zur Herstellung einer lösch-und wiederverwendbaren Tiefdruckform
DE102009010080A1 (de) 2009-02-18 2010-08-19 Sächsische Walzengravur GmbH Tiefdruckform als Sleeve oder Zylinder mit einer ablösbaren Schicht
DE102009010081A1 (de) 2009-02-18 2010-08-19 Sächsische Walzengravur GmbH Tiefdruck- oder Prägeform als Sleeve oder Zylinder und Verfahren zur Herstellung derer
JP5000682B2 (ja) * 2009-05-01 2012-08-15 旭化成イーマテリアルズ株式会社 レーザー彫刻可能な円筒状フレキソ印刷原版
DE202014001960U1 (de) 2014-02-27 2014-03-20 Sächsische Walzengravur GmbH Druck- oder Prägeform

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2051681B (en) * 1979-06-25 1983-03-02 Drg Ltd Printing rolls
EP0038385A1 (de) * 1980-04-14 1981-10-28 Karl D. Bardin Metallüberzogene Kunststoff-Intaglio-Druckzylinder und -Druckplatten, Verfahren und Apparat
US4503769A (en) * 1982-06-21 1985-03-12 Armotek Industries, Inc. Metal coated thin wall plastic printing cylinder for rotogravure printing
NL8302811A (nl) * 1983-08-10 1985-03-01 Anderson & Vreeland Bv Drukcilinder, alsmede rasterwals voor een flexo-drukmachine.
JPS62196189A (ja) * 1986-02-25 1987-08-29 Showa Denko Kk グラビア印刷用ロ−ル母材

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345864A (en) * 1991-09-25 1994-09-13 Sulzer-Escher Wyss Ag Printing cylinder of a rotary printing press and a method for use therewith
US5782181A (en) * 1995-03-14 1998-07-21 Erminio Rossini S.P.A. Concentric double sleeve for a rotary printing cylinder
US5735206A (en) * 1995-03-20 1998-04-07 Erminio Rossini, Spa Deformable mandrels for rotary printing cylinders
DE19545597A1 (de) * 1995-12-06 1997-06-12 Polywest Kunststofftechnik Hülse für Druck- oder Rasterwalzen
DE19545597C2 (de) * 1995-12-06 1999-01-07 Polywest Kunststofftechnik Verfahren zur Herstellung einer Hülse für Druck- oder Rasterwalzen
EP0787597A2 (de) 1996-01-31 1997-08-06 POLYWEST KUNSTSTOFFTECHNIK Saueressig & Partner GmbH & Co. KG Hülse für eine Tiefdruckwalze, Verfahren zu ihrer Herstellung und Arbeitsverfahren der Vorrichtung zur Herstellung
DE19603500A1 (de) * 1996-01-31 1997-08-07 Polywest Kunststofftechnik Hülse für eine Tiefdruckwalze, Verfahren zu ihrer Herstellung und Arbeitsverfahren der Vorrichtung zur Herstellung
US5819657A (en) * 1996-03-11 1998-10-13 Ermino Rossini, Spa Air carrier spacer sleeve for a printing cylinder

Also Published As

Publication number Publication date
DE69012605T2 (de) 1995-01-19
ES2063170T3 (es) 1995-01-01
CA2009087A1 (en) 1990-08-23
ATE111805T1 (de) 1994-10-15
IT8919541A0 (it) 1989-02-23
AU5708490A (en) 1991-12-19
AU622809B2 (en) 1992-04-16
EP0384104A1 (de) 1990-08-29
DE69012605D1 (de) 1994-10-27
JPH02248291A (ja) 1990-10-04
DK0384104T3 (da) 1995-02-13
IT1228855B (it) 1991-07-05

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