EP1188577B1 - Verfahren und Vorrichtung zur Herstellung von Tiefdruckzylindern - Google Patents

Verfahren und Vorrichtung zur Herstellung von Tiefdruckzylindern Download PDF

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Publication number
EP1188577B1
EP1188577B1 EP01122133A EP01122133A EP1188577B1 EP 1188577 B1 EP1188577 B1 EP 1188577B1 EP 01122133 A EP01122133 A EP 01122133A EP 01122133 A EP01122133 A EP 01122133A EP 1188577 B1 EP1188577 B1 EP 1188577B1
Authority
EP
European Patent Office
Prior art keywords
nickel
boron
copper foil
coating
cylinder
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.)
Expired - Lifetime
Application number
EP01122133A
Other languages
English (en)
French (fr)
Other versions
EP1188577A2 (de
EP1188577A3 (de
Inventor
Charles Edward Mccomas
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.)
McComas Technologies AG
Original Assignee
McComas Technologies 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 McComas Technologies AG filed Critical McComas Technologies AG
Publication of EP1188577A2 publication Critical patent/EP1188577A2/de
Publication of EP1188577A3 publication Critical patent/EP1188577A3/de
Application granted granted Critical
Publication of EP1188577B1 publication Critical patent/EP1188577B1/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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/16—Curved printing plates, especially cylinders
    • B41N1/20—Curved printing plates, especially cylinders made of metal or similar inorganic compounds, e.g. plasma coated ceramics, carbides
    • 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
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/06—Printing plates or foils; Materials therefor metallic for relief printing or intaglio printing

Definitions

  • the invention relates to a method for manufacturing gravure cylinders and to a corresponding gravure cylinder making equipment, in particular to a manufacturing line having several workstations for engraving, plating, finishing etc.
  • Gravure cylinders are used in the gravure printing process. This process makes use of rotating, ink-carrying gravure cylinders on the surface of which the print information has been previously impressed or mechanically punched by engraving machines.
  • a gravure cylinder is commonly manufactured in a complex production line comprising a plurality of stations, with a particular process being performed at each station.
  • the initial or preceding engraving step is followed by various plating and finishing steps.
  • the established technique for producing gravure cylinders comprises attaching a copper layer to a steel roll, either through electroplating or by attaching a copper sheet. A negative of the image to be printed is then engraved on the surface of the copper. In order to provide a reasonable lifetime for the cylinder, the engraved image is then coated with a hard chromium plating layer in an electroplating operation.
  • the engraving step is the process step where the highest expenses in terms of time and costs reside.
  • the subsequent steps are less time-consuming, but harder to control and susceptible to mistakes that tend to impair the finish quality of the previously engraved cylinder.
  • up to half of the cylinders may develop faults in the surface which would affect the quality of the final printed image. In such cases, it is necessary to remove the chromium layer and inevitably the engraved image. The engraving and plating must then be repeated and consequently such a process is costly and inefficient.
  • the hard coating is thus deposited on the surface of the cylinder prior to the engraving step. If such a sequence of events were to be performed using the known techniques, the hard coating would not be able to withstand the engraving operation and would flake off.
  • the nickel-boron hard coating may be deposited in an electroless coating manner.
  • the hard coating has a columnar, or nodular structure, which allows the coating layer to withstand the engraving operation while the underlying relatively soft surface is deformed.
  • a further beneficial aspect of using a nickel-boron coating is that such a coating may be harder and more wear-resistant than the conventional chrome coating, extending the life time of the gravure cylinder, perhaps by a factor of two. Printing a desired circulation of an illustrated publication would thus require only two identical gravure cylinders where the conventional art may require the production of four identical gravure cylinders.
  • a further aspect of the invention provides a method of manufacturing a gravure cylinder comprising the steps of:
  • the following provides a description of the preferred method for depositing a hard coating on a soft surface which may then be subsequently engraved to provide the desired patterned surface.
  • a soft layer is applied to a steel roll.
  • this soft layer is a layer of copper.
  • a copper foil may be wrapped onto the steel roll or the steel roll may be copper plated in a known manner.
  • This first step (that may be performed in a stand-alone workstation separate from the throughput of the manufacturing line) allows for the mechanical deformation that is linked with the engraving process.
  • a hard nickel-boron coating is then applied to the copper layer using an electroless plateing technique.
  • the nickel-boron coating may be applied as described in U.S. patent 4,833,041 .
  • a further suitable technique is described in U.S. patent 6,066,406 .
  • the thickness of the hard layer of the new gravure cylinder is preferably in the range 2 - 52 ⁇ m (micrometer), more preferable in the range 6 - 15 ⁇ m (micrometer), and typically 11 - 13 ⁇ m (micrometer).
  • the nickel-boron coating is accomplished by a process comprising the steps of providing a nickel-boron bath having a pH of 10 to 14, immersing the soft (copper) surface to be coated into the bath using a hoist arrangement, and electrolessly depositing said nickel-boron coating on the soft (copper) surface.
  • a plating method and of the employed bath stations are known under the tradename CEMKOTE.
  • Any conventional electroless nickel-boron coating bath can be used. Electroplating of the hard nickelboron coating may be used instead of the preferred electroless coating.
  • the gravure cylinder is engraved to apply the desired print pattern.
  • a conventional engraving machine may be employed using known techniques.
  • Nickel-boron coatings applied using the methods of U.S. patent 4,833,041 or U.S. patent 6,066,406 typically have a columnar, nodular microstructure. This microstructure enables an engraving operation to be carried out after deposition. In the engraving operation, columns of the hard coating are pushed into the soft copper layer by the action of a stylus found in conventional engraving machines.
  • the nickel-boron coating is deposited before engraving.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Claims (11)

  1. Verfahren zur Herstellung eines Tiefdruckzylinders, mit den folgenden Schritten:
    Vorsehen einer relativ weichen Oberfläche eines Metallzylinders, Beschichten der relativ weichen Oberfläche mit einer relativ harten Nickel-Bor-Beschichtung zur Ausbildung eines beschichteten Metallzylinders, und mechanisches Gravieren eines gewünschten Druckmusters auf den beschichteten Metallzylinder.
  2. Verfahren nach Anspruch 1, wobei die relativ weiche Oberfläche durch eine auf eine zylindrische Oberfläche einer Stahlwalze gewickelte Kupferfolie vorgesehen wird.
  3. Verfahren nach Anspruch 1, wobei die relativ weiche Oberfläche durch eine kupferbeschichtete Stahlwalze vorgesehen wird.
  4. Verfahren nach Anspruch 1, wobei die Nickel-Bor-Beschichtung durch einen Prozess bewerkstelligt wird, der die folgenden Schritte aufweist:
    Vorsehen eines Nickel-Bor-Beschichtungsbads mit einem pH-Wert von 10 bis 14;
    Eintauchen der zu beschichtenden Kupferfolie in das Bad; und stromloses Abscheiden der Nickel-Bor-Beschichtung auf der Kupferfolie.
  5. Verfahren nach Anspruch 1, wobei die Nickel-Bor-Beschichtung durch einen Prozess eines Nickel-Bor-Galvanisierens bewerkstelligt wird.
  6. Verfahren zur Herstellung eines Tiefdruckzylinders, mit den folgenden Schritten:
    Beschichten einer Kupferfolie mit einer harten Beschichtung; mechanisches Gravieren der beschichteten Kupferfolie; und
    Wickeln der beschichteten und gravierten Kupferfolie auf eine zylindrische Oberfläche einer Stahlwalze,
    wobei der Schritt des Beschichtens der Kupferfolie ein Prozess zur Nickel-Bor-Beschichtung mit den folgenden Schritten ist:
    - Vorsehen eines Nickel-Bor-Beschichtungsbads mit einem pH-Wert von 10 bis 14;
    - Eintauchen der zu beschichtenden Kupferfolie in das Bad; und
    - stromloses Abscheiden der Nickel-Bor-Beschichtung auf der Kupferfolie.
  7. Herstellungslinie zur Herstellung eines Tiefdruckzylinders, die Arbeitsstationen umfasst zum
    (i) Vorsehen einer relativ weichen Oberfläche eines Metallzylinders,
    (ii) Beschichten der relativ weichen Oberfläche mit einer relativ harten Nickel-Bor-Beschichtung zum Ausbilden eines beschichteten Metallzylinders, und
    (iii) mechanischen Gravieren eines erwünschten Druckmusters auf dem beschichteten Metallzylinder.
  8. Herstellungslinie nach Anspruch 7, wobei die Arbeitsstation zum Vorsehen der relativ weichen Oberfläche eine Kupferfolie auf eine zylindrische Oberfläche einer Stahlwalze wickelt.
  9. Herstellungslinie nach Anspruch 7, wobei die Arbeitsstation zum Vorsehen der relativ weichen Oberfläche eine Stahlwalze mit Kupfer beschichtet.
  10. Herstellungslinie nach Anspruch 7, wobei die Nickel-Bor-Beschichtungs-Arbeitsstationen Folgendes umfassen:
    - ein Bad zum Nickel-Bor-Beschichten mit einem pH-Wert von 10 bis 14;
    - eine Anordnung zum Eintauchen der zu beschichtenden Kupferfolie in das Bad; und
    - eine chemische Lösung zum stromlosen Abscheiden der Nickel-Bor-Beschichtung auf der Kupferfolie.
  11. Herstellungslinie nach Anspruch 7, wobei die Arbeitsstationen zum Nickel-Bor-Beschichten einen Prozess einer Nickel-Bor-Galvanisierung durchführen.
EP01122133A 2000-09-18 2001-09-14 Verfahren und Vorrichtung zur Herstellung von Tiefdruckzylindern Expired - Lifetime EP1188577B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66435100A 2000-09-18 2000-09-18
US664351 2000-09-18

Publications (3)

Publication Number Publication Date
EP1188577A2 EP1188577A2 (de) 2002-03-20
EP1188577A3 EP1188577A3 (de) 2004-03-03
EP1188577B1 true EP1188577B1 (de) 2008-11-19

Family

ID=24665640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01122133A Expired - Lifetime EP1188577B1 (de) 2000-09-18 2001-09-14 Verfahren und Vorrichtung zur Herstellung von Tiefdruckzylindern

Country Status (3)

Country Link
EP (1) EP1188577B1 (de)
AT (1) ATE414620T1 (de)
DE (1) DE60136602D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10214989A1 (de) * 2002-04-04 2003-10-30 Georg Frommeyer Druckzylinder zur Verwendung in einer Tiefdruckmaschine, sowie Verfahren zur Herstellung einer Oberflächenbeschichtung eines Druckzylinders
DE50304555D1 (de) * 2002-10-17 2006-09-21 Hell Gravure Systems Gmbh Verfahren zur Herstellung einer Druckform für den Tiefdruck
CN110760905A (zh) * 2019-11-28 2020-02-07 汕头市铠嘉模具有限公司 碱性无氰镀铜工艺在凹版行业的应用

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5646753A (en) * 1979-09-26 1981-04-28 Dainippon Printing Co Ltd Preparation of gravure lithographic plate
NL178497C (nl) * 1982-04-16 1986-04-01 Twentse Graveerind Werkwijze voor het vervaardigen van een flexibele diepdrukhuls.
DE4212582A1 (de) * 1992-04-15 1993-10-21 Hell Ag Linotype Verfahren zur Gravur von Druckformen sowie Druckform zur Durchführung des Verfahrens
FR2720976B1 (fr) * 1994-06-08 1996-07-12 Pechiney Emballage Alimentaire Procédé d'impression par héliogravure avec des encres sans solvants.
TR200003236T2 (tr) * 1998-05-08 2001-03-21 Mccomas Technologies Ag Nikel ve bor ihtiva eden kaplama kompozisyonları.

Also Published As

Publication number Publication date
ATE414620T1 (de) 2008-12-15
EP1188577A2 (de) 2002-03-20
DE60136602D1 (de) 2009-01-02
EP1188577A3 (de) 2004-03-03

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