EP2686168B1 - Système composé d'un cylindre d'impression et d'un blanchet ou d'une forme d'impression et procédé de fabrication - Google Patents

Système composé d'un cylindre d'impression et d'un blanchet ou d'une forme d'impression et procédé de fabrication Download PDF

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Publication number
EP2686168B1
EP2686168B1 EP12709852.3A EP12709852A EP2686168B1 EP 2686168 B1 EP2686168 B1 EP 2686168B1 EP 12709852 A EP12709852 A EP 12709852A EP 2686168 B1 EP2686168 B1 EP 2686168B1
Authority
EP
European Patent Office
Prior art keywords
printing
channel
layer
microspheres
blanket
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Withdrawn - After Issue
Application number
EP12709852.3A
Other languages
German (de)
English (en)
Other versions
EP2686168A1 (fr
Inventor
Stefan Füllgraf
Markus Gnass
Detlef Roeder
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.)
ContiTech Elastomer Beschichtungen GmbH
Original Assignee
ContiTech Elastomer Beschichtungen 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 ContiTech Elastomer Beschichtungen GmbH filed Critical ContiTech Elastomer Beschichtungen GmbH
Publication of EP2686168A1 publication Critical patent/EP2686168A1/fr
Application granted granted Critical
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Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1293—Devices for filling up the cylinder gap; Devices for removing the filler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/04—Blanket structure multi-layer
    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/06—Blanket structure facilitating fastening to, or location on, supports

Definitions

  • the invention further relates to a method for producing such a system.
  • a system of the type mentioned has long been known from the prior art. Such systems are used both in offset printing on blankets and metal blankets as well as in high-pressure forms such. Flexographic printing applications in which the blanket has a comparatively high flexibility or compressibility.
  • An advantage of the system is that the blanket or printing form can first be fabricated as a two-dimensional flat surface with a beginning and an end.
  • the production of such a blanket or such a printing form is possible in a simple manner, whereas the production of an endless printing cylinder is expensive.
  • the channel is closed with an elastomer.
  • the blanket is first made from a production cylinder.
  • a support layer is first clamped on the production cylinder, on which the cover layer is attached.
  • the remaining between the peripheral ends of the cover layer channel is closed with a curable elastomer.
  • the blanket is cut in the region of the elastomer in the axial direction of the production cylinder and removed from the production cylinder.
  • the printing blanket is clamped on the printing cylinder in such a way that the end faces of the elastomer are in contact with each other. The channel is thus closed on the printing cylinder.
  • the production of the from the DE 103 07 382 A1 known blanket is expensive.
  • the elastomer introduced into the channel is incompressible. If forces are thus applied in the radial direction to the printing blanket, then the elastomer can avoid these forces only in that it expands in the circumferential direction of the blanket. This leads to the initiation of unwanted forces in the circumferential direction of the blanket, which can be accompanied by a deterioration of the printed image.
  • the WO 2010/061413 A1 describes a typographic plate cylinder having a groove or nip for mounting a coating, which in turn has two flaps which, when bent and inserted into a groove or gap of the cylinder, form a gap in the coating.
  • a completion member is provided which has an elongated member which is intended for insertion and which remains clamped in the gap without projecting radially from the coating, thereby obscuring the gap.
  • the invention has for its object to provide an optimized system of the type mentioned, in which no impurities can penetrate into the region of the cover layer of the blanket or the printing plate.
  • the invention is further based on the object to provide a method for producing such a system.
  • the characterizing feature of claim 1 the complete filling of the channel takes place in such a way that the peripheral ends of the blanket or of the printing forme are non-positively connected with one another via the compressible material.
  • the object is further achieved in that after the drawing of the blanket or the printing forme on the printing cylinder, the remaining between the peripheral ends of the outer layer structure channel is completely filled with a compressible material according to its characterizing feature.
  • the advantage achieved by the invention can be seen in the fact that in the region of the printing layer, in particular in the channel, no impurities can penetrate. This is due to the fact that the channel is completely filled with a compressible material which frictionally connects the peripheral ends of the cover layer. Thus, neither in the compressible material, nor at the transitions from the compressible material to the cover layer are scratches in which contaminants can penetrate.
  • Another advantage of the invention is that the system can be easily manufactured. In particular, it is not necessary to manufacture the blanket or the printing form on a separate production cylinder.
  • Suitable starting materials are preferably elastomeric materials such as EPDM, NBR, modified epoxy resins or silicone rubbers or elastomers based on Polyurethane or polyurea.
  • thermoplastics such as PE or PP can be used if they are compliant at the temperature of the application.
  • blowing agents both chemical and physical blowing agents can be used.
  • physical blowing agents for example, compressed gases (eg air, CO2 or CFC) or volatile hydrocarbons are understood.
  • Azodicarbonamides, sulfonylhydrazides or hydrogencarbonates can be used as chemical blowing agents.
  • a combination of polyuritan or polyureas or a combination of polyurethane and polyureas with microspheres is used.
  • the color of the material is preferably black, e.g. by the addition of carbon black, so that it can be lasered.
  • a print template can be created on a printing form.
  • the compressible material consists of a chemically curing material in which microspheres are embedded.
  • a chemically curing material is selected which requires a maximum of 15 minutes to cure, so closing the channel does not take too much time.
  • the compressibility of the material is brought about by means of embedded microspheres, which enclose air.
  • the cover layer has a compressible intermediate layer, wherein in the chemically curing material so many microspheres are embedded that the compressibility of the intermediate layer corresponds to the compressibility of the chemically curing material.
  • so many microspheres are embedded in the chemically curing material that the density of the cured material with microspheres is 20% to 40% lower than the density of the cured material without microspheres.
  • the advantage is that the Compressible intermediate layer containing the top layer of a blanket or a printing plate usual manner is formed homogeneously over the entire circumference of the blanket or the printing plate. This ensures that the printing blanket or printing form behaves homogeneously in all directions during a printing process. Any chemically curing materials may be used to form the invention.
  • the chemically curing material is an epoxy resin, which is composed of an epoxy resin and a curing agent, being used as the epoxy polymer blocks, which carry so-called epoxide groups at the end.
  • the reaction products of bisphenol-A and epichlorohydrin can be used, which form a stable thermoset after mixing with the curing agent containing amino or mercapto.
  • the support layer is formed as a metal foil.
  • the compressible material is formed as a two-component epoxy resin, wherein at least one component of the epoxy resin contains microspheres.
  • the edges of the peripheral ends of the cover layer are sealed prior to introduction of the compressible material with an elastomer.
  • the advantage of this development is the fact that the edges of the cover layer are completely sealed with the elastomer and thus the compressible material needs to bind exclusively to a single substance, namely the elastomer.
  • the elastomer may be selected to provide a particularly strong bond between the compressible material and the elastomer. This leads to a particularly strong frictional connection between the peripheral ends of the cover layer.
  • Fig. 1 shows a system 2, consisting of a printing cylinder 4 and a blanket 6 or a printing plate 6 in cross section.
  • the printing cylinder 4 has a gap 8 which extends in the axial direction of the printing cylinder 4.
  • the printing blanket 6 or the printing forme 6 has a cover layer 10, which in the exemplary embodiment shown consists of a printing layer 12 directed radially outward, a fabric layer 14 and a compressible layer 16.
  • the topcoat may optionally contain additional layers.
  • the cover layer 10 is connected to a support layer 18, which is preferably formed as a metal foil.
  • the leading end 20 and the trailing end 22 of the support layer 18 are free of the cover layer 10.
  • the blanket 6 and the printing plate 6 in a conventional manner in the axially extending gap 8 of the printing cylinder 4 clamped.
  • a channel 28 which extends in the axial direction of the printing cylinder 4.
  • the channel 28 is completely filled with a compressible material 30.
  • the filling of the channel 28 by means of the compressible material 30 is such that filling of the channel 28 in the radial direction is as thick as the cover layer 10 and the radially outward surface of the compressible material 30 with the radially outwardly facing surface of the print layer 12 forms a plane, as it does in the Fig. 1 is shown.
  • the blanket 6 and the printing plate 6 then has the same thickness everywhere. This can be achieved, for example, in that the channel 28 is first filled to the extent that the compressible material 30 is beyond the pressure layer 12 and the excess compressible material 30 is abraded.
  • the compressible material 30 consists of a chemically curing material in which microspheres are embedded.
  • the chemically curing material 30 is a two-part epoxy resin.
  • the compressibility of the material 30 corresponds to the compressibility of the compressible layer 16. It is possible to seal the edges of the circumferential ends 24, 26 of the cover layer 10 of the blanket 6 and the printing plate 6 with an elastomer prior to introducing the compressible material 30 into the gap 8. For a better connection of the compressible material to the edges of the peripheral ends 24, 26 is achieved.
  • Fig. 2 shows the system 2 with the gap 8, which is filled with the compressible material 30, in plan view.

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Claims (6)

  1. Système (2), composé de :
    - un cylindre d'impression (4) qui possède un interstice (8) dans la direction axiale,
    - un blanchet (6) ou une planche d'impression (6) muni(e) d'une couche de recouvrement (10), qui contient une couche d'impression (12) dirigée dans le sens radial vers l'extérieur, et comprenant une couche porteuse (18) qui comporte une extrémité amont (20) et une extrémité aval (22), l'extrémité amont (20) et l'extrémité aval (22) de la couche porteuse (18) étant exemptes de la couche de recouvrement (10),
    l'extrémité amont (20) et l'extrémité aval (22) de la couche porteuse (18) étant serrées dans l'interstice (8) du cylindre d'impression (4) de telle sorte qu'il reste un canal (28) qui s'étend dans la direction axiale du cylindre d'impression (4) entre les extrémités circonférentielles (24, 26) de la couche de recouvrement (10),
    le canal (28) étant entièrement rempli d'un matériau compressible,
    le matériau compressible étant constitué d'un matériau durcissant par effet chimique dans lequel sont enrobées des microsphères, et
    la couche de recouvrement (10) possédant une couche intermédiaire (16) compressible,
    caractérisé en ce
    que le nombre de microsphères qui sont enrobées dans le matériau durcissant par effet chimique du canal (28) est tel que la densité du matériau durci du canal (28) est inférieure de 20 % à 40 % à la densité du matériau durci du canal (28) sans microsphères.
  2. Système (2) selon la revendication 1, caractérisé en ce que le matériau durcissant par effet chimique est une résine époxy.
  3. Système (2) selon l'une des revendications 1 ou 2, caractérisé en ce que la couche porteuse (18) est un film métallique.
  4. Procédé de fabrication d'un système (2), composé de :
    un cylindre d'impression (4) qui possède un interstice (8) dans la direction axiale,
    un blanchet (6) ou une planche d'impression (6) muni(e) d'une couche de recouvrement (10), qui contient une couche d'impression (12) dirigée dans le sens radial vers l'extérieur, et comprenant une couche porteuse (18) qui comporte une extrémité amont (20) et une extrémité aval (22), l'extrémité amont (20) et l'extrémité aval (22) de la couche porteuse étant exemptes de la couche de recouvrement,
    l'extrémité amont (20) et l'extrémité aval (22) de la couche porteuse (18) étant serrées dans l'interstice (8) du cylindre d'impression (4) de telle sorte qu'il reste un canal (28) qui s'étend dans la direction axiale du cylindre d'impression (4) entre les extrémités circonférentielles (24, 26) de la couche de recouvrement (10),
    le canal (28) restant étant entièrement rempli d'un matériau compressible,
    le matériau compressible étant constitué d'un matériau durcissant par effet chimique dans lequel sont enrobées des microsphères, et
    la couche de recouvrement (10) possédant une couche intermédiaire (16) compressible,
    caractérisé en ce
    que le nombre de microsphères qui sont enrobées dans le matériau durcissant par effet chimique du canal (28) est tel que la densité du matériau durci du canal (28) est inférieure de 20 % à 40 % à la densité du matériau durci du canal (28) sans microsphères.
  5. Procédé selon la revendication 4, caractérisé en ce que le matériau compressible est réalisé sous la forme de résine époxy à deux composantes et en ce qu'au moins une composante de la résine époxy contient des microsphères.
  6. Procédé selon l'une des revendications 4 ou 5, caractérisé en ce que les faces frontales des extrémités circonférentielles (24, 26) de la couche de recouvrement (10) sont scellées avec un élastomère avant l'introduction du matériau compressible.
EP12709852.3A 2011-03-16 2012-03-15 Système composé d'un cylindre d'impression et d'un blanchet ou d'une forme d'impression et procédé de fabrication Withdrawn - After Issue EP2686168B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110001315 DE102011001315A1 (de) 2011-03-16 2011-03-16 System, bestehend aus einem Drucktuchzylinder und einem Drucktuch
PCT/EP2012/054538 WO2012123533A1 (fr) 2011-03-16 2012-03-15 Système composé d'un cylindre d'impression et d'un blanchet ou d'une forme imprimante

Publications (2)

Publication Number Publication Date
EP2686168A1 EP2686168A1 (fr) 2014-01-22
EP2686168B1 true EP2686168B1 (fr) 2018-11-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12709852.3A Withdrawn - After Issue EP2686168B1 (fr) 2011-03-16 2012-03-15 Système composé d'un cylindre d'impression et d'un blanchet ou d'une forme d'impression et procédé de fabrication

Country Status (3)

Country Link
EP (1) EP2686168B1 (fr)
DE (1) DE102011001315A1 (fr)
WO (2) WO2012123149A2 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK159251C (da) * 1983-03-12 1991-02-18 Basf Ag Fremgangsmaade til lukning af spalten mellem en paa et dybtrykapparats trykformcylinder opspaendt dybtrykplades ender, samt indretning ved dybtryksapparatet, til udoevelse af fremgangsmaaden
DE3920093A1 (de) * 1989-06-20 1991-01-03 Basf Ag Verfahren zum verschliessen und/oder abdichten von oeffnungen, hohl- oder zwischenraeumen bei auf formzylindern aufgebrachten druckplatten
US5749298A (en) * 1997-06-10 1998-05-12 Reeves Brothers, Inc. Arrangement for securing a printing blanket to a cylinder
US6899029B2 (en) * 2002-02-14 2005-05-31 Reeves, S.P.A. Multi-layered gapped cylindrical printing blanket
DE10307382A1 (de) 2002-12-16 2004-07-08 Koenig & Bauer Ag Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine und ein Verfahren zur Herstellung einer Drucktucheinheit für einen Drucktuchzylinder
JP3878622B2 (ja) * 2004-05-19 2007-02-07 株式会社東京機械製作所 ブランケット胴の埋め部材
BRPI0916084A2 (pt) * 2008-11-03 2015-11-10 Trelleborg Engineered Systems Italy S P A "método para produzir um revestimento para um cilindro tipográfico, e, revestimento para um cilindro tipográfico"

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
WO2012123149A2 (fr) 2012-09-20
EP2686168A1 (fr) 2014-01-22
DE102011001315A1 (de) 2012-09-20
WO2012123533A1 (fr) 2012-09-20
WO2012123149A3 (fr) 2012-12-20

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