EP2393661B1 - Verfahren zur herstellung von rasterwalzen - Google Patents

Verfahren zur herstellung von rasterwalzen Download PDF

Info

Publication number
EP2393661B1
EP2393661B1 EP10702994.4A EP10702994A EP2393661B1 EP 2393661 B1 EP2393661 B1 EP 2393661B1 EP 10702994 A EP10702994 A EP 10702994A EP 2393661 B1 EP2393661 B1 EP 2393661B1
Authority
EP
European Patent Office
Prior art keywords
laser
roller
engraving
ceramic
pulse
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.)
Active
Application number
EP10702994.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2393661A1 (de
Inventor
Heribert Wille
Roland Winter
Andreas Tillmann
Günter Fuchs
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP2393661A1 publication Critical patent/EP2393661A1/de
Application granted granted Critical
Publication of EP2393661B1 publication Critical patent/EP2393661B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00Forme preparation
    • B41C1/02Engraving; Heads therefor
    • B41C1/04Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05Heat-generating engraving heads, e.g. laser beam, electron beam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41NPRINTING 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
    • B41N7/00Shells for rollers of printing machines
    • B41N7/06Shells for rollers of printing machines for inking rollers

Definitions

  • the invention relates to a process for the production of anilox rollers, in particular z.
  • anilox rolls those that are used under the name "anilox rolls" in so-called short inking units of offset printing machines to take in conjunction with a doctor blade or a chambered doctor blade color from a paint reservoir and to promote more rollers in the direction of the printing plate.
  • anilox rollers are also used in coating plants to dose the amount of paint to be applied and find in addition to the offset printing in other printing processes such.
  • the anilox rollers intended for use in anilox inking units are usually provided on the surface with a hard ceramic layer for the purpose of longer service life.
  • problems occur. Often, after a relatively short service life, streaks appear in the print image due to the fact that ceramic particles detach from the anilox roller, jam against the blade of the doctor blade and then generate grooves on the roller surface. The reason for this lies in the manufacturing process of laser engraving.
  • thermal YAG laser or CO 2 laser whose laser pulses partially evaporate material from the wells produced by them, but partly also drive out in the molten state, in which case the material on both sides of the generated depression as a "mountain" precipitates on the surface.
  • the recesses in the laser engraving are produced by a repetitively operated short-pulse laser, wherein in each case a plurality of laser pulses are used to work out the depression in the cross-sectional profile.
  • the ablated material adheres to the ridges of an anilox roller in a manner such that these remnants can be removed by a short, inexpensive finishing operation, such as honing, lapping or polishing, or by a non-eruptive cleaning operation .
  • Manual overpolishing or wiping off residues from the roller engraved in the manner described with the short pulse laser is already sufficient to produce a very smooth and stable surface on which the doctor blade slides.
  • the lasers used according to the invention preferably fiber lasers or disk lasers, deliver laser pulses in the range between 20 picoseconds and 200 nanoseconds and average laser powers in the range between 10 watts to several 100 watts. It is important that the used short-pulse laser provides sufficient energy density to optimally use the built-in light energy for ablation of the material to be processed.
  • the incoming material on the average power must be large enough to ablate, for example, in the case of anilox rolls having a ceramics surface with a pick-up volume of typically 3 cm 3 is at least 0.5 cm 3 ceramic material per hour. Because otherwise the processing time for the laser engraving of a roller would be unacceptably long or the simultaneous use of multiple lasers, the plant technical effort will be too large.
  • a suitable for the processing of anilox rollers short pulse laser generates z.
  • the well depths customary in anilox inking units for anilox rollers can be easily achieved, with several laser pulses being used to work out the cross-sectional profile be placed one behind the other, typically 5 to 100 laser pulses depending on the width and depth of the wells or Haschuren.
  • this number of pulses depressions with relatively smooth clean edges can be produced and, moreover, the cross-sectional flank shape of the wells or hafors can be influenced in such a way that, in comparison to the other methods mentioned at the beginning, one for the ink release / acceptance behavior of the wells good geometry yields.
  • the anilox roller is then engraved in several passes, so that the cross-sectional shape is worked out in several superimposed layers by the laser pulses.
  • the pulse repetition rate of the laser is several 100,000 kHz.
  • an anilox roller for a 35/50 cm printing unit can be engraved within a few hours at speeds between 100 and 1,000 rpm.
  • the laser engraving is followed by a finishing step and / or a cleaning step, for. B. in the same clamping of the roller as in the previous laser engraving itself, but the finishing step or cleaning step can also be done manually, for example, by polishing or wiping the lasered rollers z. B. with a cleaning agent, either still in the set or after it was taken out of the clamping.
  • cleaning the roll in an ultrasonic bath may be sufficient, and in some cases, such a finishing step may be completely eliminated.
  • the structured anilox roll was not honed again but polished manually for about 10 minutes.
  • the thus obtained anilox roll had comparable good properties to those of Example 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Laser Beam Processing (AREA)
EP10702994.4A 2009-02-03 2010-01-14 Verfahren zur herstellung von rasterwalzen Active EP2393661B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009007281 2009-02-03
PCT/EP2010/000172 WO2010089020A1 (de) 2009-02-03 2010-01-14 Verfahren zur herstellung von rasterwalzen

Publications (2)

Publication Number Publication Date
EP2393661A1 EP2393661A1 (de) 2011-12-14
EP2393661B1 true EP2393661B1 (de) 2015-06-10

Family

ID=42235248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10702994.4A Active EP2393661B1 (de) 2009-02-03 2010-01-14 Verfahren zur herstellung von rasterwalzen

Country Status (4)

Country Link
EP (1) EP2393661B1 (zh)
CN (1) CN102307730B (zh)
DE (1) DE102010004632A1 (zh)
WO (1) WO2010089020A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105882110A (zh) * 2016-04-28 2016-08-24 广东光泰激光科技有限公司 一种小辊径网纹辊无色差螺旋纹雕刻方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103171276A (zh) * 2011-12-23 2013-06-26 上海运城制版有限公司 光学薄膜印刷用陶瓷网纹辊
DE102014225559A1 (de) * 2014-01-23 2015-07-23 Heidelberger Druckmaschinen Ag Rasterwalze
DE102014110285A1 (de) * 2014-07-22 2016-01-28 Thyssenkrupp Ag Einrichtung und Verfahren zum Strukturieren einer Walze durch Laserabtrag
CN104626728A (zh) * 2015-02-03 2015-05-20 龙游运城压纹制版有限公司 一种压纹辊的雕刻方法
CN105563291B (zh) * 2015-12-16 2017-12-12 广东光泰激光科技有限公司 一种提高陶瓷网纹辊合格率的加工方法
PL415898A1 (pl) * 2016-01-25 2017-07-31 Zakład Poligraficzny Pol-Mak P.D. Makowiak Spółka Jawna Kałamarz farbowy oraz sposób grawerowania kałamarza farbowego
CN109109457B (zh) * 2018-08-03 2022-05-24 常州龙润激光科技有限公司 一种网纹辊及其制造方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3636251A (en) * 1968-08-28 1972-01-18 Quantronix Corp Laser facsimile system for engraving printing plates
US5093180A (en) 1989-05-02 1992-03-03 Union Carbide Coatings Service Technology Corporation Liquid transfer articles and method for producing them
US5047116A (en) * 1989-05-31 1991-09-10 Union Carbide Coatings Service Technology Corporation Method for producing liquid transfer articles
US5143578A (en) * 1990-08-07 1992-09-01 Union Carbide Coatings Service Technology Corporation Method for engraving solid articles with laser beams
CA2349912A1 (en) * 2000-07-07 2002-01-07 Heidelberger Druckmaschinen Aktiengesellschaft Setting an image on a printing plate using ultrashort laser pulses
CN1451537A (zh) * 2003-04-28 2003-10-29 湖南百富瑞材料有限责任公司 一种陶瓷网纹辊的生产和修复方法
CN101184630A (zh) * 2005-06-06 2008-05-21 株式会社新克 凹版制版辊及其制造方法
DE102007011708A1 (de) 2007-03-08 2008-09-11 Kurt Zecher Gmbh Rasterwalze für Druckmaschinen sowie Herstellungsverfahren
DE102007032903A1 (de) * 2007-07-14 2009-01-15 Schepers Gmbh + Co. Kg Verfahren zum Betreiben einer Lasergravureinrichtung
CN101224660B (zh) * 2008-01-18 2010-09-15 深圳职业技术学院 网纹辊及其制造工艺

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105882110A (zh) * 2016-04-28 2016-08-24 广东光泰激光科技有限公司 一种小辊径网纹辊无色差螺旋纹雕刻方法

Also Published As

Publication number Publication date
CN102307730A (zh) 2012-01-04
CN102307730B (zh) 2014-04-16
EP2393661A1 (de) 2011-12-14
DE102010004632A1 (de) 2010-08-05
WO2010089020A1 (de) 2010-08-12

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