EP0287002B1 - Rasterwalze für ein Offsetfarbwerk sowie Verfahren zur Herstellung einer derartigen Rasterwalze - Google Patents

Rasterwalze für ein Offsetfarbwerk sowie Verfahren zur Herstellung einer derartigen Rasterwalze Download PDF

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Publication number
EP0287002B1
EP0287002B1 EP88105687A EP88105687A EP0287002B1 EP 0287002 B1 EP0287002 B1 EP 0287002B1 EP 88105687 A EP88105687 A EP 88105687A EP 88105687 A EP88105687 A EP 88105687A EP 0287002 B1 EP0287002 B1 EP 0287002B1
Authority
EP
European Patent Office
Prior art keywords
coating
pits
pitted
hard ceramic
thickness
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.)
Revoked
Application number
EP88105687A
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German (de)
English (en)
French (fr)
Other versions
EP0287002A3 (en
EP0287002A2 (de
Inventor
Rudolf Herb
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.)
Koenig and Bauer AG
Original Assignee
Albert Frankenthal AG
Koenig and Bauer Albert AG
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6325830&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0287002(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Albert Frankenthal AG, Koenig and Bauer Albert AG filed Critical Albert Frankenthal AG
Publication of EP0287002A2 publication Critical patent/EP0287002A2/de
Publication of EP0287002A3 publication Critical patent/EP0287002A3/de
Application granted granted Critical
Publication of EP0287002B1 publication Critical patent/EP0287002B1/de
Anticipated expiration legal-status Critical
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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
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/06—Shells for rollers of printing machines for inking rollers
    • 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
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—Top layers
    • 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
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments

Definitions

  • the invention relates to an anilox roller for an inking unit assigned to an offset printing machine, in particular a short inking unit, with a steel core and a screened surface which has webs and cups and which cooperates with at least one doctor blade, preferably in the form of a chamber doctor blade, which is connected to the doctor blade Contacting surface of the webs consists of material harder than the steel core and the cups are provided with a hydrophobic surface coating.
  • An anilox roller of this type is known from US-A 4,637,310.
  • the steel core is engraved.
  • the surface of the engraved blank is subjected to a nitriding process, i.e. diffusion hardening.
  • a copper layer is applied to the hardened surface.
  • the nitriding process proposed here for producing a hard layer is cumbersome and complex and not reliable enough. It can happen that the Diffusion speed is not the same everywhere, so that there may be an insufficient depth of diffusion and thus the thickness of the hardened layer.
  • the strength which can be achieved with a diffusion hardening of the type proposed here is not always able to cope with the loads to be expected in the case of applications of the type present here.
  • GB-A 2 049 102 shows an anilox roller with a ceramic jacket that is engraved on a steel core.
  • the cells are not surface-coated.
  • the surface in the area of the wells therefore proves to be moisture-friendly, which can have an unfavorable effect on the adhesion of the color in the wells and the filling of the wells with paint.
  • the result of this can be fluctuations in the amount of ink transferred and thus fluctuations in color density in the printed image.
  • the cells are designed as recesses provided with a hydrophobic surface coating of a hard ceramic material, peripheral coating of the steel core, which is engraved on the surface and has a thickness greater than the depth of the cells.
  • the short inking unit on which FIG. 1 is based consists of a rubberized applicator roller 2 which cooperates with a plate cylinder 1 which can be covered with hard offset printing plates and which has the same diameter as the plate cylinder and an anilox roller 3 which cooperates with the applicator roller 2.
  • the applicator roller 2 acts simultaneously with a dampening unit 4 together.
  • the circumference of the anilox roller 3 is provided with cups 5 indicated in an enlarged manner in FIG. 1 and the webs 6 delimiting them.
  • the cups 5 are filled with paint, the webs 6 are scraped off, so that there is an exact dosage of the color corresponding to the capacity of the cups 5.
  • the ink supply to the anilox roller 3 and the doctoring take place by means of a chamber doctor blade arrangement designated as a whole in FIG. This consists of two doctor blades lying against the anilox roller 3 with a negative angle of attack, which delimit a chamber acted upon by ink between them.
  • the anilox roller 3 as can best be seen from FIG. 2, consists of a steel core 8, which can have the side bearing stubs, and a coating 9 made of hard ceramic material on the circumference of the steel core 8, into which the cups 5 are embedded. Chromium oxide or aluminum oxide can be used to form the hard ceramic coating. Materials of this type can easily be applied to the steel core 8 by spraying.
  • the thickness of the coating 9 is approximately 150 ⁇ .
  • the depth of the cells 5 is of the order of magnitude between 20 ⁇ to 50 ⁇ . The thickness of the coating 9 is therefore at least about three times the depth of the cells.
  • the cups 5 When the cups 5 are engraved into the coating 9 made of hard-ceramic material, such as chromium oxide or aluminum oxide or the like, webs 6 between the cups 5, which consist of hard-ceramic material, automatically result.
  • the webs 6 accordingly consist of a high-strength material, so that a high wear resistance is achieved.
  • the wells 5 are provided with a lining 10, as can further be seen in FIG. which consists of water-repellent and color-accepting material, for example vapor-deposited copper, which is also resistant to color and cleaning agents.
  • the hard ceramic coating 9 can, as already mentioned above, be applied to the steel core 8 by spraying. Such a coating produces a blank of the type on which FIG. 3 is based. If necessary, this blank can be ground to achieve an exact concentricity and an exact diameter.
  • the cups 5 are then engraved into the coating 9, so that the state underlying FIG. 4 results.
  • the hard ceramic coating 9 should be engraved with the aid of a laser beam. This enables a high level of engraving accuracy to be achieved.
  • the cups 5 are engraved into the hard ceramic coating 9, as already stated above, they result was believed, the webs made of hard ceramic material 6 automatically. Following the engraving, the blank processed so far is ground on the circumference and polished or lapped in order to deburr the webs 6 and smooth the surface. This processing stage is based on FIG. 4 /.
  • the blank on which FIG. 4 is based is then coated on the circumference with a fine layer of hydrophobic material.
  • film-like copper plating should be provided for this.
  • the layer thickness of this coating is small compared to the layer thickness of the hard ceramic coating 9 and is approximately 4 ⁇ m to 5 ⁇ m.
  • Such a coating can be vapor-deposited or applied galvanically or the like.
  • nickel or silicone or asphalt or a suitable plastic in the form of Teflon or Rilsan could also be used. Silicon or asphalt can be applied by brushing or spraying.
  • This coating initially also covers the circumferential head surface of the webs 6. In this area, however, abrasion takes place within a very short time during operation, so that grinding off after the coating has taken place can be dispensed with. However, it would also be readily conceivable to grind the webs 6 on the head side after the pulling-on process until hard ceramic material emerges, so that constant conditions would be expected from the start during operation.
  • the hydrophobic coating is retained on the surface of the cups 5 that is recessed relative to the peripheral surface and thereby forms the hydrophobic lining 10.
  • This lining 10 reduces the capacity of the wells 5 which are initially engraved in the hard ceramic coating 9 by laser beam.
  • the actual engraving depth T indicated in FIG. 4 must accordingly be deeper by the thickness of the lining 10 than the engraving of a conventional anilox roller, i. H. by the thickness of the lining 10 is deeper than the depth t indicated in FIG. 2 required to achieve the desired capacity of the wells 5 provided with the lining 10.
  • the hard ceramic coating 9 and the coating that results in the lining 10 each consist of a layer of the same material.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP88105687A 1987-04-16 1988-04-09 Rasterwalze für ein Offsetfarbwerk sowie Verfahren zur Herstellung einer derartigen Rasterwalze Revoked EP0287002B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873713027 DE3713027A1 (de) 1987-04-16 1987-04-16 Rasterwalze fuer ein offsetfarbwerk, sowie verfahren zur herstellung einer derartigen rasterwalze
DE3713027 1987-04-16

Publications (3)

Publication Number Publication Date
EP0287002A2 EP0287002A2 (de) 1988-10-19
EP0287002A3 EP0287002A3 (en) 1989-06-28
EP0287002B1 true EP0287002B1 (de) 1994-11-02

Family

ID=6325830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105687A Revoked EP0287002B1 (de) 1987-04-16 1988-04-09 Rasterwalze für ein Offsetfarbwerk sowie Verfahren zur Herstellung einer derartigen Rasterwalze

Country Status (2)

Country Link
EP (1) EP0287002B1 (enrdf_load_stackoverflow)
DE (2) DE3713027A1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989005731A1 (en) * 1987-12-18 1989-06-29 Stanley Fellows Improved rollers
JPH03150195A (ja) * 1989-07-07 1991-06-26 Union Carbide Coatings Services Technol Corp 蒸着保護ポリマーフィルムを有する液体トランスファー品
EP0511543A1 (de) * 1991-04-27 1992-11-04 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Walze für eine Druckmaschine
US5483886A (en) * 1992-08-28 1996-01-16 Koenig & Bauer Aktiengesellschaft Paper guide for web-fed press
US5832835A (en) * 1996-07-12 1998-11-10 Markem Corporation Soft doctoring cup

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822692C2 (de) * 1988-07-05 1996-02-15 Kochsmeier Hans Hermann Rasterwalze in einem Auftragswerk einer Druckmaschine
DE4036661C1 (enrdf_load_stackoverflow) * 1990-11-17 1992-06-17 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4408615C2 (de) * 1994-03-15 1996-01-11 Roland Man Druckmasch Näpfchenwalze innerhalb eines Auftragswerks einer Rotationsdruckmaschine
DE4413236A1 (de) * 1994-04-15 1995-10-19 Heidelberger Druckmasch Ag Schichtförmiger Druckzylinder
DE4424913C2 (de) * 1994-07-14 1996-07-11 Koenig & Bauer Albert Ag Strukturierte Farbübertragungswalze eines Kurzfarbwerkes einer Offsetrotationsdruckmaschine
DE29903308U1 (de) 1999-02-24 1999-09-30 Nordson Corp., Westlake, Ohio Rad-Auftragsvorrichtung
DE19957453C1 (de) * 1999-09-03 2001-02-01 Ruediger Woerz Verfahren zum Auftragen von hochviskoser Farbe bei einer Offset-Druckmaschine
US6982116B1 (en) 2000-02-18 2006-01-03 Praxair S.T. Technology, Inc. Coatings on fiber reinforced composites
DE10028478A1 (de) * 2000-06-08 2001-12-13 Roland Man Druckmasch Verfahren zur Herstellung einer Rasterwalze
US7419704B2 (en) 2005-08-18 2008-09-02 Praxair S. T. Technology, Inc. Coatings on fiber reinforced composites
DE102008007679B4 (de) * 2008-02-07 2016-05-25 manroland sheetfed GmbH Druckwerk für eine Verarbeitungsmaschine
CN102085743B (zh) 2009-12-04 2014-04-09 海德堡印刷机械股份公司 印刷装置
US9522524B2 (en) * 2015-02-02 2016-12-20 Eastman Kodak Company Method of multi-station flexographic printing including anilox roll with low surface energy zone

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4603634A (en) * 1985-02-04 1986-08-05 Rockwell International Corporation Copper and nickel layered ink metering roller

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2049102A (en) * 1979-05-03 1980-12-17 Csi Corp Transfer roll
DE3117341C2 (de) * 1981-05-02 1988-07-07 Albert-Frankenthal Ag, 6710 Frankenthal Farbwerk
JPS59204558A (ja) * 1983-05-09 1984-11-19 Tokyo Kikai Seisakusho:Kk 平版印刷用メツシユロ−ル
US4537127A (en) * 1984-09-12 1985-08-27 Rockwell International Corporation Black oxide lithographic ink metering roller
US4601242A (en) * 1985-02-04 1986-07-22 Rockwell International Corporation Copper and ceramic composite ink metering roller
DE3608286A1 (de) * 1985-04-03 1986-10-09 Winfried 7758 Meersburg Heinzel Verfahren zur oberflaechenbehandlung eines druckmaschinenzylinders, druckmaschinenzylinder sowie verwendung derselben
DE3525045A1 (de) * 1985-07-13 1987-01-22 Paul Sauer Druckwalzenfabriken Druckwalze

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4603634A (en) * 1985-02-04 1986-08-05 Rockwell International Corporation Copper and nickel layered ink metering roller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Bundespatentgericht Beschluss 9W(Pat)111/8 vom 10.01.90 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989005731A1 (en) * 1987-12-18 1989-06-29 Stanley Fellows Improved rollers
JPH03150195A (ja) * 1989-07-07 1991-06-26 Union Carbide Coatings Services Technol Corp 蒸着保護ポリマーフィルムを有する液体トランスファー品
EP0406902A3 (en) * 1989-07-07 1992-06-10 Union Carbide Coatings Service Technology Corp. Liquid transfer article having a vapor deposited protective polymer film
EP0511543A1 (de) * 1991-04-27 1992-11-04 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Walze für eine Druckmaschine
US5483886A (en) * 1992-08-28 1996-01-16 Koenig & Bauer Aktiengesellschaft Paper guide for web-fed press
US5832835A (en) * 1996-07-12 1998-11-10 Markem Corporation Soft doctoring cup

Also Published As

Publication number Publication date
DE3851972D1 (de) 1994-12-08
EP0287002A3 (en) 1989-06-28
DE3713027C2 (enrdf_load_stackoverflow) 1990-08-30
DE3713027A1 (de) 1988-11-17
EP0287002A2 (de) 1988-10-19

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