EP0009360B2 - Herstellung von Hohlkörpern für die Druckerei - Google Patents

Herstellung von Hohlkörpern für die Druckerei Download PDF

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Publication number
EP0009360B2
EP0009360B2 EP19790301857 EP79301857A EP0009360B2 EP 0009360 B2 EP0009360 B2 EP 0009360B2 EP 19790301857 EP19790301857 EP 19790301857 EP 79301857 A EP79301857 A EP 79301857A EP 0009360 B2 EP0009360 B2 EP 0009360B2
Authority
EP
European Patent Office
Prior art keywords
sleeve
mandrel
roll
layer
plating
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
Application number
EP19790301857
Other languages
English (en)
French (fr)
Other versions
EP0009360B1 (de
EP0009360A1 (de
Inventor
Arthur Graham Alsop
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.)
Strachan and Henshaw Machinery Ltd
Original Assignee
DRG UK Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10499631&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0009360(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by DRG UK Ltd filed Critical DRG UK Ltd
Publication of EP0009360A1 publication Critical patent/EP0009360A1/de
Publication of EP0009360B1 publication Critical patent/EP0009360B1/de
Application granted granted Critical
Publication of EP0009360B2 publication Critical patent/EP0009360B2/de
Expired 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
    • B41N1/20—Curved printing plates, especially cylinders made of metal or similar inorganic compounds, e.g. plasma coated ceramics, carbides
    • 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
    • B41C1/182—Sleeves; Endless belts

Definitions

  • This invention relates to printing rolls, and is especially applicable to rolls suitable for accepting photo-originating designs, such as used in the gravure or lithographic printing processes.
  • a gravure printing surface is provided by etching the surface of a metal printing roll.
  • the production of the roll and the need to replace or discard it after use makes the process very expensive, and only suitable for relatively long printing runs.
  • EP 0000410 there is disclosed a printing sleeve of tapered internal surface and parallel external surface. It has two or three layers of different metals all electrolytically deposited, the outer or middle layer resp. being ground to uniform outside diameter. This disclosure falls under Art. 54(3) EPC.
  • US-A-4024045 discloses the production of a simple metal sleeve by electrolytic deposition on a roller and its subsequent removal therefrom.
  • the roller can be tapered to facilitate removal or the sleeve can be expandable by internal overpressure, and may have a chromium release coating.
  • a sleeve made of plastics material, preferably reinforced plastics material, is fitted onto a roll core which can be of metal construction.
  • a roll core which can be of metal construction.
  • the internal diameter of the sleeve is slightly larger at one end than the other, and the external diameter of the core is similarly slightly larger at one end than the other so that the sleeve can be slid partly onto the core before it wedges.
  • the core is provided with apertures in that region which is initially covered by the sleeve and through which compressed air can be forced to slightly expand the sleeve so that it can be slid fully onto the core.
  • the present invention provides a sleeve substantially as described in the foregoing paragraph, but made in novel manner entirely of metal so as to provide a conductive path from the inside to the outside of the sleeve to assist in electro-plating the outer surface of the sleeve.
  • the invention provides a method of making such a sleeve, comprising taking a generally cylindrical mandrel the external diameter of which is slightly larger at one end than the other, and optionally having fluid outlet apertures in a region intermediate its ends, coating the outside surface of the mandrel with a release agent, applying non-electrolytically a first layer of metal over the outside surface of the mandrel, grinding the outside surface of the first metal layer to provide it with a uniform external diameter and electroplating an etchable second metal layer onto the first metal layer.
  • at least one, and preferably both, of the metal layers are copper. It is particularly preferred that said second layer is copper.
  • the outer surface of the second metal layer can be finished in conventional manner to provide a surface suitable for gravure printing.
  • Such finishing may for example take the form of grinding, polishing and eventually etching to provide the imaged surface, and possibly flash chrome-plating to provide a more durable finish.
  • the first layer may be provided by spraying molten metal onto the outside surface of the mandrel, the fluid outlet holes having been masked beforehand.
  • the first layer may be applied by straining a preformed metal sheet around the mandrel, with either a helical or a longitudinal butt seam, and welding the seam to secure the layer.
  • the fluid outlet holes may be masked before or after application of the release agent, but preferably they are masked after, using metal shim, such as copper shim, which is thereby incorporated in the sprayed metal layer.
  • the metal sleeve is at some suitable point in the process removed from the mandrel. This may be done by applying fluid, for example air, under pressure to the apertures in the mandrel so as to slightly expand the sleeve and allow it to be withdrawn axially from the smaller diameter end. Removal from the mandrel may take place when the electro-plated layer has been fully finished. However, it may be desirable to mount the sleeve on different mandrels at different stages during the process; for example for applying the first metal layer, for the electro-plating, and for the etching.
  • fluid for example air
  • the sleeve can be removed, in the manner described, from the one mandrel and fitted onto the next mandrel by a process which involves sliding the sleeve over the mandrel until the fluid outlet holes are covered and then applying fluid under pressure to the fluid outlet holes to slightly expand the sleeve so that it can be slid fully onto the mandrel.
  • the first layer may not be sufficiently strong or resilient to withstand the fluid pressure without distortion, and other means may be needed for removing it from the first mandrel and fitting it to the second mandrel. This may be achieved by heating and cooling so as to take advantage of thermal expansion and contraction.
  • the sleeve 10 is made from a thermosetting resin, such as polyester or epoxy resin, reinforced with glass fibre, which is preferably spirally wound so as to provide hoop strength for the sleeve.
  • the outside surface 12 of the sleeve is of uniform diameter, but the inside surface 14 has a very small taper from one end to the other. (This taper is greatly exaggerated in the drawing for the sake of clarity in explanation).
  • the sleeve is removably mounted to a roll core 16, shown separately in Fig. 1, suitably made of steel, having an axle 18 for rotatably mounting the core.
  • the outside surface of the core is similarly slightly tapered, and is dimensioned so as to allow the sleeve to be manually slid onto the core to rather more than half its length before the sleeve wedges on the core as shown in Fig. 2.
  • An air supply passage 20 extends axially along the core and emerges at outlets 22 on the surface of the core about half way along its length. These outlets are thus covered by the sleeve at the point where the sleeve wedges onto the core. Compressed air is then applied through the passage 20 so as slightly to expand the sleeve and allow it to be completely slid onto the core, as shown in Fig. 3. The supply of air is then discontinued and the sleeve is then firmly fitted to the core.
  • a steel mandrel 38 on which the sleeve is to be formed has the same general shape and construction as the roll core 16, but its outside diameter, point for point along its length, is very slightly less than that of the roll core to which the sleeve is eventually fitted. In this way, the sleeve thus produced will be slightly undersized with respect to the roll core, and will therefore be a tight fit on it.
  • the mandrel has air outlets 22 about halfway along its length. In the first stage of construction, the outside surface of the mandrel is covered with a layer 39 of a silicone release agent. Then a strip or hoop of copper shim 40 is fitted around the mandrel so as to cover the outlets 22.
  • a particulate copper composition is sprayed on to form a copper layer 41.
  • This can be done by known techniques, for example by feeding copper rod or powder into a spraying head where a plasma electric arc melts it and forms minute droplets of molten copper which are protected from oxidation by an inert gas while they are sprayed onto the surface of the mandrel.
  • the outside surface of this first layer is then ground so as to produce a uniform outside diameter (as compared with the slightly tapering outside diameter of the mandrel).
  • the first copper layer is electro-plated to provide a second copper layer 42 of desired thickness, the outside surface of which is ground, polished, etched to produce the gravure printing surface, and finally flash chrome-plated.
  • the sleeve is removed from the mandrel by applying air under pressure to the outlets 22 which slightly expands the sleeve so that it can be withdrawn lengthwise from the narrower end of the mandrel.
  • a similar mandrel 38 is used, and a silicone release agent applied to it. Then a thin sheet of copper 43 is strained around the mandrel so as to provide a butt joint 45 which is secured by plasma welding; that is using a very narrow well-defined electric plasma arc flame produced from a tungsten tip with inert gas protection, to locally melt the copper along the seam and weld the two butting edges together. Thereafter this first copper layer is ground to produce a uniform external diameter, before electro-plating the second layer as previously described.
  • the all copper sleeves of this invention will generally have a somewhat smaller taper than the corresponding reinforced plastics sleeves referred to above.
  • a taper of about 1: 5000 might be appropriate for the sleeves one metre long.
  • the mandrel coated with a silicone release agent is heated to about 100°C above ambient temperature.
  • An electrically conductive metal preferably zinc, is sprayed onto the release coated mandrel to form a metal base sleeve.
  • a typical wall thickness is of the order of 0.5 to 0.8 mm.
  • the mandrel is heated in order to accept more easily the sprayed metal and also to assist in removing the metal base sleeve from the forming mandrel by contraction of the mandrel on cooling.
  • the metal base sleeve on the forming mandrel is then machined to a uniform external diameter and is ready for removal from the forming mandrel.
  • the temperature of the mandrel in the meantime has cooled down and in order to remove the metal base sleeve its temperature is raised quickly and it is slid lengthwise off the forming mandrel. Air is not used at this stage for the removal of the metal base sleeve from the mandrel, particularly if the metal base sleeve is made of zinc, since zinc is too soft and the sleeve would be distorted.
  • the metal base sleeve 48 is expanded by heat and slid onto a plating mandrel 50 (Fig. 6).
  • the ends of the sleeve extend beyond the body of the mandrel and are closed by end plugs 52, e.g. of acetal resin, with O-ring seals 54 to prevent the migration of the plating bath solution between the sleeve and the mandrel but allowing the end faces of the sleeve to be plated.
  • a gap 55 is left between the end faces and the plugs.
  • the metal base sleeve is then plated with copper to a required thickness and is then ground to a finish diameter.
  • the copper layer strengthens the sleeve to such an extent that the sleeve can be removed from the plating mandrel and mounted and demounted from a printing roll core by compressed air as described above.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)

Claims (10)

1. Druckhülse zum Aufschieben auf eine Druckwalze, deren eines Ende einen geringfügig größeren Durchmesser aufweist als das andere Ende, wobei die Hülse ähnlich dimensioniert ist, so daß sie auf der Walze angeordnet werden kann, indem sie in Längsrichtung auf dieselbe aufgeschoben wird, bis sie Auslaßöffnungen für ein Fluid verdeckt, die in der Walze zwischen den Enden derselben angeordnet sind, woraufhin ein unter Druck stehendes Fluid den Auslaßöffnungen zugeführt wird, um die Hülse geringfügig aufzuweiten, die sodann den Rest des Weges auf die Walze aufgeschoben wird, dadurch gekennzeichnet, daß die Hülse (10) vollständig aus Metall hergestellt ist und eine durch nicht-elektrolytisches Aufbringen auf einen Kern gebildete innere Metallschicht (41, 43, 48), welche die Walze berührt und eine zylindrische Außenfläche aufweist, und eine ätzbare elektrolytisch aufgebrachte äußere Metallschicht (42) umfaßt.
2. Druckhülse nach Anspruch 1, wobei sowohl die innere Schicht als auch die elektrolytisch aufgebrachte Schicht aus Kupfer bestehen.
3. Druckhülse nach Anspruch 1, wobei die innere Schicht aus Zink und die elektrolytisch aufgebrachte Schicht aus Kupfer ist.
4. Verfahren zur Herstellung einer Druckhülse, die auf eine Druckwalze aufschiebbar ist, deren eines Ende einen geringfügig größeren Durchmesser aufweist als das andere Ende, wobei die Hülse ähnlich dimensioniert ist, so daß sie auf der Walze aufgebracht werden kann, indem sie in Längsrichtung auf die Walze aufgeschoben wird, bis sie Auslaßöffnungen für ein Fluid verdeckt, die in der Walze zwischen deren Enden angeordnet sind, woraufhin ein unter Druck stehendes Fluid den Auslaßöffnungen zugeführt wird, um die Hülse geringfügig aufzuweiten, um sie den Rest des Weges auf die Walze aufzuschieben, gekennzeichnet durch die Verwendung eines im allgemeinen zylindrischen Kerns (38), dessen Außendurchmesser an einem Ende geringfügig größer ist als am anderen Ende, Beschichten der Außenfläche des Kerns mit einem Antihaftmittel (39), nicht-elektrolytisches Aufbringen einer ersten Metallschicht (41, 43, 48) auf die Außenfläche des Kerns, Schleifen der Außenfläche der ersten Metallschicht zur Erzielung eines gleichmäßigen Außendurchmessers und elektrolytisches Aufbringen einer ätzbaren zweiten Metallschicht (42) auf der Metallschicht.
5. Verfahren nach Anspruch 4, wobei die erste Schicht durch Aufsprühen von geschmolzenem Metall auf die Außenfläche des Kerns erhalten wird.
6. Verfahren nach Anspruch 4 oder 5, wobei die Hülse vom Kern abgenommen wird, indem ein unter Druck stehendes Fluid im Kern angeordneten Austrittsöffnungen zugeführt wird, um die Hülse geringfügig aufzuweiten, so daß sie von dem einen kleineren Durchmesser aufweisenden Ende des Kerns axial abgezogen werden kann.
7. Verfahren nach Anspruch 5, wobei die Hülse nach dem Aufbringen der ersten Metallschicht (48) vom ersten Kern auf einen Beschichtungskern (50) überführt wird, auf dem die zweite Schicht elektrolytisch aufgebracht wird.
8. Verfahren nach Anspruch 7, wobei die Hülse (48) vom ersten Kern abgenommen wird, indem sie auf eine höhere Temperatur als der Kern erhitzt wird, so daß sie relativ zum Kern expandiert und axial von diesem abgezogen werden kann.
9. Verfahren nach Anspruch 8, wobei die Hülse (48) axial auf den Beschichtungskern (50) aufgeschoben wird, während sie sich auf einer relativ höheren Temperatur befindet, so daß sie sich bei der Abkühlung zusammenzieht und an den Beschichtungskern (50) anschmiegt.
10. Verfahren nach einem der Ansprüche 7, 8 und 9, wobei die Endbereiche der Hülse (48) über den Körper des Beschichtungskerns (50) hinausragen und die Enden der Hülse durch Teile (52, 54) verschlossen sind, die gegen die Innenfläche der Hülse abdichten, wodurch die Endflächen der Hülse (48) zum elektrolytischen Beschichten freigelegt sind.
EP19790301857 1978-09-13 1979-09-10 Herstellung von Hohlkörpern für die Druckerei Expired EP0009360B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7836626 1978-09-13
GB3662678 1978-09-13

Publications (3)

Publication Number Publication Date
EP0009360A1 EP0009360A1 (de) 1980-04-02
EP0009360B1 EP0009360B1 (de) 1984-02-01
EP0009360B2 true EP0009360B2 (de) 1991-03-20

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ID=10499631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790301857 Expired EP0009360B2 (de) 1978-09-13 1979-09-10 Herstellung von Hohlkörpern für die Druckerei

Country Status (4)

Country Link
EP (1) EP0009360B2 (de)
JP (1) JPS5559992A (de)
DE (1) DE2966610D1 (de)
GB (1) GB2031801B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7322917B2 (en) 2001-11-26 2008-01-29 Fabio Perini, S.P.A. Embossing cylinder with interchangeable sleeve and with system for locking the sleeve at the ends and embossing machine comprising said cylinder
DE10345562B4 (de) * 2003-10-01 2014-09-04 Sächsische Walzengravur GmbH Einweghülse zum lösbaren Befestigen entweder auf einer Trägerwalze oder auf einer Adapterhülse der Trägerwalze zum Drucken, Lackieren und Beschichten
WO2015161278A1 (en) * 2014-04-17 2015-10-22 Universal Engraving, Inc. Graphic arts sleeve and support mandrel

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JPS5718256A (en) * 1980-07-09 1982-01-30 Dainippon Printing Co Ltd Method of attaching or detaching sleeve plate for gravure printing
JPS57146656A (en) * 1981-03-05 1982-09-10 Dainippon Printing Co Ltd Sleeve plate for gravure printing and its mounting method on cylinder for printing
JPS57191065A (en) * 1981-05-22 1982-11-24 Dainippon Printing Co Ltd Method and apparatus for withdrawing gravure sleeve from printing roll
JPS57191064A (en) * 1981-05-22 1982-11-24 Dainippon Printing Co Ltd Method and apparatus for mounting gravure sleeve plate on printing roll
JPS5795464A (en) * 1980-12-04 1982-06-14 Dainippon Printing Co Ltd Gravure printing plate and its manufacture
JPS57191066A (en) * 1981-05-22 1982-11-24 Dainippon Printing Co Ltd Gravure plate
JPS5817140U (ja) * 1981-07-28 1983-02-02 江守　治 印刷用などの筒体
NL178497C (nl) * 1982-04-16 1986-04-01 Twentse Graveerind Werkwijze voor het vervaardigen van een flexibele diepdrukhuls.
US4503769A (en) * 1982-06-21 1985-03-12 Armotek Industries, Inc. Metal coated thin wall plastic printing cylinder for rotogravure printing
JPS61177293A (ja) * 1985-02-04 1986-08-08 Toyo Ink Mfg Co Ltd グラビア印刷版シリンダ
JPS61189995A (ja) * 1985-02-19 1986-08-23 Toyo Ink Mfg Co Ltd フレキソアニロツクスロ−ル
EP0196443B1 (de) * 1985-03-29 1990-05-23 Saueressig Gmbh & Co. Tiefdruckzylinder, bestehend aus einem Kern und einer lösbar mit diesem verbundenen Hülse
DK600285D0 (da) * 1985-12-20 1985-12-20 Jens Erik Sattrup Fremgangsmaade til fremstilling af en dybtrykcylinder
EP0386316B1 (de) * 1989-03-07 1993-12-29 Landis & Gyr Business Support AG Verfahren zur Herstellung einer Matrizenhülse und Vorrichtung zur Durchführung des Verfahrens
US5216954A (en) * 1991-10-24 1993-06-08 Thompson William L Multi-section mountable sleeves and methods for mounting and dismounting same
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DE4432816A1 (de) * 1994-09-15 1996-03-21 Roland Man Druckmasch Druckwalze für den kanallosen Druck
DE19603500A1 (de) * 1996-01-31 1997-08-07 Polywest Kunststofftechnik Hülse für eine Tiefdruckwalze, Verfahren zu ihrer Herstellung und Arbeitsverfahren der Vorrichtung zur Herstellung
US6401614B1 (en) * 1996-03-14 2002-06-11 Rotoincisa S.R.L. Process for preparing removable metal sleeves for printing machines
IT1283244B1 (it) * 1996-03-14 1998-04-16 Rotoincisa Srl Procedimento per la preparazione delle camicie da fotoincidere, sfilabili dei cilindri per la stampa rotocalco e camicie ottenute
DE19617745C2 (de) * 1996-05-03 2002-06-13 Heidelberger Druckmasch Ag Druckmaschinenzylinder mit einer Korrosions-Schutzschicht, sowie Verfahren zur Herstellung eines solchen
US6832547B2 (en) 1996-10-16 2004-12-21 Fort James Corporation Embossing system including sleeved rolls
WO1999064250A1 (de) * 1998-06-08 1999-12-16 Mdc Max Dätwyler Bleienbach Ag Verfahren und vorrichtung zum behandeln einer druckform für die grafische industrie
DE10297470T5 (de) 2001-11-26 2004-12-02 Fabio Perini S.P.A. Zylinder mit austauschbarer Hülse sowie Verfahren zu seiner Herstellung
AU2002225331A1 (en) * 2001-12-20 2003-07-09 Rotoincisa S.R.L. Process for preparing removable metal sleeves for printing machines
NL1024430C2 (nl) * 2003-10-02 2005-04-05 Drent Graphic Machines Werkwijze voor het vervaardigen van naadloze offsetdrukcilinderhuls, verwisselbare naadloze offsetdrukcilinderhuls, gebruik van en samenstel met een dergelijke offsetdrukcilinderhuls.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7322917B2 (en) 2001-11-26 2008-01-29 Fabio Perini, S.P.A. Embossing cylinder with interchangeable sleeve and with system for locking the sleeve at the ends and embossing machine comprising said cylinder
DE10345562B4 (de) * 2003-10-01 2014-09-04 Sächsische Walzengravur GmbH Einweghülse zum lösbaren Befestigen entweder auf einer Trägerwalze oder auf einer Adapterhülse der Trägerwalze zum Drucken, Lackieren und Beschichten
WO2015161278A1 (en) * 2014-04-17 2015-10-22 Universal Engraving, Inc. Graphic arts sleeve and support mandrel

Also Published As

Publication number Publication date
EP0009360B1 (de) 1984-02-01
GB2031801B (en) 1982-10-27
DE2966610D1 (en) 1984-03-08
EP0009360A1 (de) 1980-04-02
JPS5559992A (en) 1980-05-06
GB2031801A (en) 1980-04-30

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