EP2277699A2 - Tamis d'impression et procédé destinés à la fabrication de tamis d'impression - Google Patents

Tamis d'impression et procédé destinés à la fabrication de tamis d'impression Download PDF

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Publication number
EP2277699A2
EP2277699A2 EP20090168380 EP09168380A EP2277699A2 EP 2277699 A2 EP2277699 A2 EP 2277699A2 EP 20090168380 EP20090168380 EP 20090168380 EP 09168380 A EP09168380 A EP 09168380A EP 2277699 A2 EP2277699 A2 EP 2277699A2
Authority
EP
European Patent Office
Prior art keywords
screen
layer
laser
stencil layer
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.)
Withdrawn
Application number
EP20090168380
Other languages
German (de)
English (en)
Inventor
Peter Kesper
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.)
Kesper Druckwalzen GmbH
Original Assignee
Kesper Druckwalzen 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 Kesper Druckwalzen GmbH filed Critical Kesper Druckwalzen GmbH
Priority to EP20090168380 priority Critical patent/EP2277699A2/fr
Publication of EP2277699A2 publication Critical patent/EP2277699A2/fr
Withdrawn legal-status Critical Current

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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
    • B41C1/14—Forme preparation for stencil-printing or silk-screen printing
    • B41C1/145—Forme preparation for stencil-printing or silk-screen printing by perforation using an energetic radiation beam, e.g. a laser

Definitions

  • the present invention relates to a method for producing printing screens from a screen and to a printing screen comprising a screen and a stencil layer.
  • a process for the production of printing screens, with which predetermined motifs can be printed on eg posters in the rotary screen printing process is for example from the EP 0 291 137 A1 known.
  • the known method is based on galvanically deposited, endless nickel screens, which extend as a cylindrical shell between two end rings.
  • a stencil layer is applied, with which the holes of the sieve are closed. Subsequently, the stencil layer is removed locally with high-energy radiation at specific locations, so that the holes of the screen, which are rendered permeable to color, form a screened image of the motif to be printed.
  • the high-energy radiation is generated with carbon dioxide lasers (CO 2 laser) in the known method.
  • CO 2 lasers used for this purpose are characterized by a very high continuous output power of typically 100 W to 2 kW and emit laser radiation with a wavelength of 10.6 microns. Due to the high output power, the CO 2 lasers have basically proven to structure the stencil layer.
  • Another method for the production of printing screens is from EP 0 913 730 A1 known.
  • a thick radiation-sensitive stencil layer is applied in a first step to a serving as a carrier nickel screen.
  • This is usually a layer which crosslinks under the action of ultraviolet radiation.
  • a thin, black colored cover layer which protects the photosensitive stencil layer from unintentional exposure, is applied to the surface of the stencil layer.
  • the covering layer which is typically less than 5 micrometers thick, is then removed by evaporation in accordance with the printing motif locally with a neodymium-doped yttrium-aluminum garnet laser (Nd: YAG laser).
  • Nd yttrium-aluminum garnet laser
  • the laser beam is directed substantially perpendicular to the covering layer of the rotating rotary printing screen.
  • the Nd: YAG laser thus does not directly structure the printing layer of the printing rollers corresponding to the stencil layer. Rather, the Nd: YAG laser or the laser radiation emanating from it serves exclusively for producing a mask for a subsequent exposure and development process.
  • the teaching of the present invention the object of a method for the production of printing screens for To provide, with a higher engraving resolution can be achieved with reduced production costs. Similarly, a printing screen should be specified, which can be printed on objects in higher resolution.
  • the previously derived and indicated object has been achieved by applying a through-colored stencil layer to the screen and structuring the stencil layer with laser radiation of the wavelength 900 nm to 1400 nm.
  • the finest structures in particular details with a resolution of 10 micrometers, can be engraved into the stencil layer.
  • the laser radiation is generated by a fiber laser.
  • a fiber laser the laser radiation is generated in an optical waveguide and passed directly into fiber optic cables.
  • the use of a fiber laser makes it possible to arrange the laser spatially separated from the actual manufacturing device and to assign only the end of the optical fiber cable and the required focusing optics of a relatively movable to the printing screen device.
  • the device is distinguished from those in which the laser is assigned directly to the device, that is, by a smaller mass and smaller size.
  • the fiber laser allows a better alignment and focusing of the laser beam used for structuring the printing screen.
  • AOM acousto-opaque modulators
  • YAG lasers yttrium-aluminum garnet lasers
  • carbon dioxide lasers YAG lasers
  • YAG lasers do not require regular replacement of the amplifying medium, resulting in lower operating costs for YAG lasers.
  • Nd YAG lasers have proven to be particularly suitable. On the one hand, they provide sufficient output power for structuring even thick stencil layers. On the other hand, large numbers of Nd: YAG lasers are available on the market at low cost.
  • a stencil layer having a layer thickness between 20 micrometers and 100 micrometers is applied to the screen.
  • the stencil layer which is subjected to mechanical stress when the viscous ink is pressed through the printing screen, can better withstand wear and a consistently high imaging quality of the produced printing screens can be ensured over a relatively long period of time.
  • the object underlying the present invention has been achieved in that the stencil layer is through-dyed, in particular through-dyed black.
  • Such a designed printing screen can be structured with laser radiation of wavelength 900 nm to 1400 nm in a particularly simple manner.
  • the layer thickness of the stencil layer is from 20 microns to 100 microns, so that it can withstand even increased mechanical requirements during printing safely.
  • the printing screen may in particular be produced according to the method according to the invention. With regard the associated advantages are made to the comments on the method according to the invention.
  • the rotary printing screen 1 is made of a galvanically deposited nickel screen 3, which extends as a cylindrical shell between two end rings, not shown here.
  • a stencil layer 2 having a layer thickness D between 20 and 100 micrometers is applied in a manner known per se.
  • the stencil layer 2 differs from the known stencil layers 2 in that it is through-dyed.
  • the rotary printing screen 1 provided with the stencil layer 2 is then patterned with infrared laser radiation 4 of the wavelength 1064 nanometers and an optical power of 300 W.
  • the rotary printing screen 1 in a device, not shown here, comparable to one Lathe, rotated.
  • a device 9, which is movable in the longitudinal direction L of the rotary printing screen 1 is provided with which the laser radiation 4 is directed onto the rotary printing screen 1.
  • the point at which the laser radiation 4 strikes the rotary printing screen 1 describes a helical line, so that the entire surface of the rotary printing screen 1 is engraved.
  • the laser radiation 4 itself is generated by a neodymium-doped yttrium-aluminum-garnet fiber laser and passed by means of a fiber optic cable 10 to the movable device 9, where it is focused with optical elements 6, 7, 8 and directed to the stencil layer 2 of the rotary printing screen 1 ,
  • optical elements 6 both diffractive elements, e.g. Lenses, as well as reflective elements, e.g. Concave mirror, to be used.
  • a rotary printing screen 1 is obtained which can be used to print objects with a higher resolution than conventional rotary printing screens without significant further intermediate steps.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
EP20090168380 2009-07-13 2009-08-21 Tamis d'impression et procédé destinés à la fabrication de tamis d'impression Withdrawn EP2277699A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20090168380 EP2277699A2 (fr) 2009-07-13 2009-08-21 Tamis d'impression et procédé destinés à la fabrication de tamis d'impression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09165277 2009-07-13
EP20090168380 EP2277699A2 (fr) 2009-07-13 2009-08-21 Tamis d'impression et procédé destinés à la fabrication de tamis d'impression

Publications (1)

Publication Number Publication Date
EP2277699A2 true EP2277699A2 (fr) 2011-01-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090168380 Withdrawn EP2277699A2 (fr) 2009-07-13 2009-08-21 Tamis d'impression et procédé destinés à la fabrication de tamis d'impression

Country Status (1)

Country Link
EP (1) EP2277699A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010010070A1 (de) * 2010-02-26 2011-09-01 Bundesdruckerei Gmbh Markierungsvorrichtung und Verfahren zum Markieren von Wert- oder Sicherheitsdokumenten mit hoher Auflösung
DE102010010071A1 (de) * 2010-02-26 2011-09-01 Bundesdruckerei Gmbh Markierungsvorrichtung und Verfahren zum Markieren von Wert- oder Sicherheitsdokumenten unter Verwendung von Lichtleitfasern
CN102330120A (zh) * 2011-09-16 2012-01-25 金昌市宇恒镍网有限公司 一种加厚高开孔率印花镍网的生产工艺
CN110549008A (zh) * 2019-08-14 2019-12-10 大族激光科技产业集团股份有限公司 一种丝网印版、激光加工丝网印版的加工系统和加工方法
CN112428661A (zh) * 2020-11-13 2021-03-02 上海新倬壮印刷科技有限公司 一种激光直写成像制作太阳能网版的方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291137A1 (fr) 1987-05-15 1988-11-17 Stork Screens B.V. Procédé pour la fabrication de pochoirs métalliques texturés et pochoir métallique portant une couche susceptible d'être dessinée
EP0913730A1 (fr) 1997-11-03 1999-05-06 Schablonentechnik Kufstein Aktiengesellschaft Procédé pour fabriquer un cliché d'impression

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291137A1 (fr) 1987-05-15 1988-11-17 Stork Screens B.V. Procédé pour la fabrication de pochoirs métalliques texturés et pochoir métallique portant une couche susceptible d'être dessinée
EP0913730A1 (fr) 1997-11-03 1999-05-06 Schablonentechnik Kufstein Aktiengesellschaft Procédé pour fabriquer un cliché d'impression

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010010070A1 (de) * 2010-02-26 2011-09-01 Bundesdruckerei Gmbh Markierungsvorrichtung und Verfahren zum Markieren von Wert- oder Sicherheitsdokumenten mit hoher Auflösung
DE102010010071A1 (de) * 2010-02-26 2011-09-01 Bundesdruckerei Gmbh Markierungsvorrichtung und Verfahren zum Markieren von Wert- oder Sicherheitsdokumenten unter Verwendung von Lichtleitfasern
CN102330120A (zh) * 2011-09-16 2012-01-25 金昌市宇恒镍网有限公司 一种加厚高开孔率印花镍网的生产工艺
CN110549008A (zh) * 2019-08-14 2019-12-10 大族激光科技产业集团股份有限公司 一种丝网印版、激光加工丝网印版的加工系统和加工方法
CN112428661A (zh) * 2020-11-13 2021-03-02 上海新倬壮印刷科技有限公司 一种激光直写成像制作太阳能网版的方法

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