EP1375145A2 - Kompensationshülse für den Flexodruck - Google Patents

Kompensationshülse für den Flexodruck Download PDF

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Publication number
EP1375145A2
EP1375145A2 EP03356096A EP03356096A EP1375145A2 EP 1375145 A2 EP1375145 A2 EP 1375145A2 EP 03356096 A EP03356096 A EP 03356096A EP 03356096 A EP03356096 A EP 03356096A EP 1375145 A2 EP1375145 A2 EP 1375145A2
Authority
EP
European Patent Office
Prior art keywords
compensating sleeve
elastomeric material
face
shore
carrier
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.)
Withdrawn
Application number
EP03356096A
Other languages
English (en)
French (fr)
Other versions
EP1375145A3 (de
Inventor
Armand Piolat
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.)
Duchenaud Uniflexo
Original Assignee
Duchenaud Uniflexo
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 Duchenaud Uniflexo filed Critical Duchenaud Uniflexo
Publication of EP1375145A2 publication Critical patent/EP1375145A2/de
Publication of EP1375145A3 publication Critical patent/EP1375145A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members

Definitions

  • a compensating sleeve is suitable specifically to compensate for the dimensional difference between a carrier rotational drive and a printer shape with the outer face forms a flexographic plate.
  • a compensating sleeve must be distinguished, on the one hand, a flexographic printing sleeve, generally consisting of a metal or composite base, coated with a photopolymer or rubber, and on the other hand a transfer sleeve, or blanket, consisting usually a metal base coated with rubber.
  • a print compensating sleeve by flexography is a component of relatively large size and weight, having various mechanical characteristics relatively antagonistic, with particularly internal and external dimensions accurate.
  • the compensating sleeve On one side, that is to say on the side of its cylindrical inner face, the compensating sleeve is centrifugally deformed or expanded but limited, over a short period, under the effect of a gas cushion under pressure (for example compressed air between 5 and 8 bars of pressure), and this to be removed from the wearer, then set up on or extracted by sliding of said carrier, as the case may be.
  • a gas cushion under pressure for example compressed air between 5 and 8 bars of pressure
  • the sleeve should have sufficient centripetal elasticity to return to the tight position against the wearer's cylindrical outer surface, once the stress centrifugal stops.
  • the sleeve compensator In the tight position against the wearer, the sleeve compensator must maintain, almost permanently, stability dimensional, in particular as regards its internal section, so as to avoid, during printing, any relative sliding in rotation between the carrier and the compensating sleeve. And these characteristics of radial elasticity and dimensional stability must remain as long as possible, notwithstanding a significant number of assemblies / disassemblies compared to the carrier.
  • the compensating sleeve On the other side, i.e. on the side of its outer face cylindrical, the compensating sleeve must remain relatively hard, of a part, given its rotational support against the medium to be printed (paper, cardboard, plastic, etc.) during the flexographic printing process, and on the other hand to preserve at its nominal value the outside diameter of the compensating sleeve, for controlled flexographic printing.
  • This hardness of the outer face also allows its polishing, for perfect adhesion of the printer form.
  • the compensating sleeve presents an almost perfect volume homogeneity, to avoid any "imbalance" during its rotation at high speed, vibration generator degrading the quality of flexographic printing.
  • a sleeve composite can only be a composite part.
  • the material of the first tube in this case a fabric glass fibers impregnated with a resin, does not allow to reconcile, in the duration, centrifugal radial elasticity and centripetal tightening stability.
  • the aforementioned material gradually releases its initial constraints, originally allowing it to ensure a good tightening; a relaxation centrifugal therefore occurs after a certain number of cycles assembly / disassembly / printing.
  • This material and more particularly the resin which permeates it, have a glass transition temperature, that is to say a transition from the glassy state in the rubbery state, between 60 and 150 ° C. Therefore, during the process of manufacture of the continuous printer form, in the form of a sleeve, in photopolymer material previously fixed on the compensating sleeve, the latter undergoes, during the polymerization of the photopolymer constituting the printer form, a relatively large temperature rise, by example between 110 ° C and 140 ° C for 30 min, exceeding this glass transition temperature, above which stability dimension of the material of the first tube is no longer guaranteed. Therefore, in returning to room temperature, this material no longer has its original dimensions, which in particular compromises its clamping capacity.
  • the object of the present invention is to remedy the drawbacks previously identified.
  • the subject of the invention is, in the context of a printing process by flexography, a construction compensating cylinder particularly simple, presenting over time, and dimensional stability of its internal and external sections, and a centripetal radial elasticity at the level of its cylindrical inner face, remaining compatible with this stability dimensional.
  • nickel-based is meant that the nickel constituting the internal base, in majority quantity, can be alloyed, in minority quantity, with one or more metals, or even other non-metallic elements, therefore that all nickel and / or other metals can be deposited on any suitable support by electrolysis or electroplating.
  • the relatively hard outer layer of the compensating sleeve is not found subject to no significant deformation, thanks to the interlayer relatively soft, notwithstanding the centrifugal radial deformations, elastic, internal base.
  • the relatively hard outer layer is found to exert a limited pressure on the internal base, through the layer relatively soft intermediate, during the phases of dilation of the base internal, helping the latter to keep a constant tightening on the carrier.
  • the invention only with the intermediate base to base of nickel, and moreover under a small thickness, it is possible to reconcile, at the level of the inner face of the compensating sleeve, and radial elasticity centrifugal and centripetal dimensional stability. This results in particular from the fact that the nickel obtained by electroplating, at low thickness, has a three-dimensional, face-centered cubic crystal structure with homogeneity, cohesion and elasticity.
  • the surface finish, perfectly smooth inside the base metallic nickel significantly promotes cushion spread air required for mounting / dismounting the base on the carrier. This allows therefore to limit this air stream in thickness, which correspondingly reduces the expansion of the base.
  • the inner diameter may be an exact reflection of the geometry of the outer surface cylindrical of the carrier.
  • the interior surface finish of the base and the thickness of the deposit are therefore almost perfect, which avoids any subsequent rectification.
  • nickel is a perfectly recyclable material, which allows to recover the manufacturing scraps of the base.
  • FIG. 1 represents an exploded view, to scale enlarged, of a carrier / compensating sleeve / printer assembly, according to the present invention.
  • the compensating sleeve (3) is made up only by the internal tubular base (5), the external layer (6) of the material hard elastomer, and the intermediate layer (7) of the soft elastomer material, bonded to each other.
  • the difference in hardness between the material hard elastomer and the soft elastomer material is at least 30 Shore D.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
EP03356096A 2002-06-24 2003-06-23 Kompensationshülse für den Flexodruck Withdrawn EP1375145A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0207797 2002-06-24
FR0207797A FR2841176B1 (fr) 2002-06-24 2002-06-24 Manchon compensateur pour l'impression flexographique

Publications (2)

Publication Number Publication Date
EP1375145A2 true EP1375145A2 (de) 2004-01-02
EP1375145A3 EP1375145A3 (de) 2004-06-09

Family

ID=29717088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03356096A Withdrawn EP1375145A3 (de) 2002-06-24 2003-06-23 Kompensationshülse für den Flexodruck

Country Status (4)

Country Link
EP (1) EP1375145A3 (de)
DE (1) DE03356096T1 (de)
ES (1) ES2217997T1 (de)
FR (1) FR2841176B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005092618A1 (en) * 2004-03-29 2005-10-06 Goss International Montataire Sa Packing sleeve for a printing unit cylinder of an offset printing press

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3633155A1 (de) * 1986-09-30 1988-04-07 Saueressig & Co Druckzylinder, insbesondere fuer das flexodruckverfahren
WO1998029259A1 (de) * 1997-01-04 1998-07-09 Rotec Hülsensysteme Gmbh Metallische druckhülse mit harter kunststoffschicht
EP1164011A3 (de) * 2000-06-16 2005-09-14 ROSSINI S.p.A. Mehrschichtige Druckhülse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005092618A1 (en) * 2004-03-29 2005-10-06 Goss International Montataire Sa Packing sleeve for a printing unit cylinder of an offset printing press
US7861652B2 (en) 2004-03-29 2011-01-04 Goss International Montataire Sa Packing sleeve for a printing unit cylinder of an offset printing press

Also Published As

Publication number Publication date
FR2841176A1 (fr) 2003-12-26
FR2841176B1 (fr) 2005-08-26
DE03356096T1 (de) 2004-10-21
EP1375145A3 (de) 2004-06-09
ES2217997T1 (es) 2004-11-16

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