EP0829558A1 - Procédé et dispositif pour le dépÔt électrolytique d'une couche de chrome sur une cylindre d'impression - Google Patents

Procédé et dispositif pour le dépÔt électrolytique d'une couche de chrome sur une cylindre d'impression Download PDF

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Publication number
EP0829558A1
EP0829558A1 EP97113074A EP97113074A EP0829558A1 EP 0829558 A1 EP0829558 A1 EP 0829558A1 EP 97113074 A EP97113074 A EP 97113074A EP 97113074 A EP97113074 A EP 97113074A EP 0829558 A1 EP0829558 A1 EP 0829558A1
Authority
EP
European Patent Office
Prior art keywords
electrolyte
gap
anode
cylinder
gravure 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.)
Withdrawn
Application number
EP97113074A
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German (de)
English (en)
Inventor
Max Dätwyler
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.)
Daetwyler Global Tec Holding AG
Original Assignee
MDC Max Daetwyler AG Bleienbach
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 MDC Max Daetwyler AG Bleienbach filed Critical MDC Max Daetwyler AG Bleienbach
Publication of EP0829558A1 publication Critical patent/EP0829558A1/fr
Withdrawn legal-status Critical Current

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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
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/003—Preparing for use and conserving printing surfaces of intaglio formes, e.g. application of a wear-resistant coating, such as chrome, on the already-engraved plate or cylinder; Preparing for reuse, e.g. removing of the Ballard shell; Correction of the engraving
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/08—Electroplating with moving electrolyte e.g. jet electroplating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated

Definitions

  • the present invention relates to a method and a device for applying a galvanic chrome coating to an intaglio cylinder according to the preamble of claim 1 and claim 4.
  • Galvanic systems for the chromium plating of gravure cylinders are known in which the gravure cylinder to be chromed is immersed in the electrolyte and rotated only with part of its circumferential surface.
  • the anode is arranged at a distance from the gravure cylinder serving as the cathode.
  • the electrolyte is passed in a turbulent flow through the gap formed between the anode and the gravure cylinder.
  • the temperature of the electrolyte is about 55 ° -60 ° C.
  • the present invention is based on the object of providing a method and a device of the type mentioned at the outset with which a higher deposition rate and thus a shorter treatment time than previously can be achieved.
  • the single figure shows in a purely schematic representation the basic structure of a device for applying a chrome layer on an intaglio cylinder.
  • the chrome-plating device shown in the figure has a working trough 1 which is filled with an electrolyte 2.
  • the gravure cylinder 3 to be chromed dips with part of its outer surface 4 into the electrolyte and is rotated in the direction of arrow A about its longitudinal axis 3a running in the horizontal direction by a drive device (not shown).
  • the gravure cylinder 3 serves as a cathode and is connected to a power supply, not shown.
  • anode 5 Arranged underneath the gravure cylinder 3 is an anode 5 which extends in the longitudinal direction thereof and is connected to power connections 6 which are only shown schematically.
  • the anode 5 is adjustable in height and has a domed anode plate 7, through the through holes of which the electrolyte 2 can pass.
  • the anode sheet 7 forms a gap 8 with the lateral surface 4 of the gravure cylinder 3, the width a of which can be adjusted by adjusting the height of the anode 5.
  • two pipes 9 and 10 Inside the tub and below the anode sheet 7 are two pipes 9 and 10, which are connected to a pump device, not shown, which conveys the electrolyte from a storage tub, also not shown, through these pipes 9 and 10 into the working tub 1.
  • the pipes 9 and 10 are provided with outlet holes, not shown, through which the electrolyte 2 flows into the working trough 1, as indicated by the arrows B, B '.
  • the work tub 1 is filled and the electrolyte 2 is circulated via these pipes 9 and 10.
  • a box 11 extends in the longitudinal direction thereof with an outlet nozzle 12 which extends over the entire length of the work tub 1.
  • the box 11 is also connected to the pump device, which conveys the electrolyte from the storage tank already mentioned via the box 11 to the outlet nozzle 12.
  • the outlet nozzle 12 is directed against the gap 8.
  • the electrolyte emerges under pressure from the outlet nozzle 12 and flows in a turbulent flow through the gap 8 between the anode sheet 7 and the cylindrical surface 4.
  • At the edge of the work tub 1 opposite the box there is an overflow 13 via which the electrolyte flows back from the work tub 1 in the direction of arrow D into the storage tub already mentioned.
  • the gravure cylinder 3 is thus provided with a chrome layer on its entire outer surface 4.
  • the outer layer of the rotogravure cylinder 3, which is covered with a chrome layer, can be a copper layer or also a layer of zinc or a zinc alloy.
  • the electrolyte 2 located in the work tub 1 has approximately room temperature, preferably a temperature between 19 ° and 24 ° C.
  • the deposition rate is, among other things, proportional to the current yield, it can easily be seen that the chromium plating times can be markedly reduced with the method and the device according to the invention. This will be explained below using an exemplary embodiment.
  • a gravure cylinder was in at a current density of 80 A / dm 2 and an electrolyte temperature of 20 ° -23 ° C. provided a chrome layer of 0.006 mm for about ten minutes. A current yield of approx. 40% was achieved.
  • electrolyte of a conventional type was used.
  • An example of a suitable electrolyte is that commercially available under the name Bornhauser "electrolyte available electrolyte mentioned, which is described in DE-C-608 757.
  • Another conventional method requires even more time to deposit an equally thick chrome layer on a rotogravure-driven gravure cylinder, which immerses around 50% of its surface area in an electrolyte that has a temperature of approx. 55 ° C, but which is not in a turbulent flow is guided past the gravure cylinder.
  • a current density of approximately 50 A / dm 2 a current efficiency of only approximately 18% is achieved. Under this condition, it takes around 20 minutes to apply a chrome layer of 0.006 mm.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
EP97113074A 1996-09-13 1997-07-30 Procédé et dispositif pour le dépÔt électrolytique d'une couche de chrome sur une cylindre d'impression Withdrawn EP0829558A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH224296 1996-09-13
CH2242/96 1996-09-13

Publications (1)

Publication Number Publication Date
EP0829558A1 true EP0829558A1 (fr) 1998-03-18

Family

ID=4229188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97113074A Withdrawn EP0829558A1 (fr) 1996-09-13 1997-07-30 Procédé et dispositif pour le dépÔt électrolytique d'une couche de chrome sur une cylindre d'impression

Country Status (2)

Country Link
EP (1) EP0829558A1 (fr)
JP (1) JPH10121291A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003007083A1 (fr) * 2001-07-11 2003-01-23 Bundesdruckerei Gmbh Procede de production de plaques d'impression helio
US7556722B2 (en) 1996-11-22 2009-07-07 Metzger Hubert F Electroplating apparatus
US8298395B2 (en) 1999-06-30 2012-10-30 Chema Technology, Inc. Electroplating apparatus
CN102892930A (zh) * 2010-03-25 2013-01-23 三菱丽阳株式会社 阳极氧化处理装置、处理槽、压印用辊状模具的制造方法以及在表面具有多个凸部的物体的制造方法
CN104480506A (zh) * 2014-12-05 2015-04-01 宁波韵升股份有限公司 一种钕铁硼薄片环形产品的电镀工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202047159U (zh) * 2011-01-31 2011-11-23 三菱丽阳株式会社 处理槽以及电解处理装置
JP7047169B1 (ja) * 2021-06-11 2022-04-04 三菱ケミカル株式会社 ロールの製造方法及びロール
CN117836474A (zh) * 2022-03-01 2024-04-05 株式会社新克 滚筒用三价铬镀敷装置及方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1673779A (en) * 1925-08-05 1928-06-12 United Chromium Inc Production of hard, wear-resisting printing surfaces
DE4113361A1 (de) * 1990-04-26 1991-10-31 Daetwyler Ag Anlage zum galvanischen behandeln von drehkoerpern, insbesondere druckzylindern

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1673779A (en) * 1925-08-05 1928-06-12 United Chromium Inc Production of hard, wear-resisting printing surfaces
DE4113361A1 (de) * 1990-04-26 1991-10-31 Daetwyler Ag Anlage zum galvanischen behandeln von drehkoerpern, insbesondere druckzylindern

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7556722B2 (en) 1996-11-22 2009-07-07 Metzger Hubert F Electroplating apparatus
US7914658B2 (en) 1996-11-22 2011-03-29 Chema Technology, Inc. Electroplating apparatus
US8298395B2 (en) 1999-06-30 2012-10-30 Chema Technology, Inc. Electroplating apparatus
US8758577B2 (en) 1999-06-30 2014-06-24 Chema Technology, Inc. Electroplating apparatus
WO2003007083A1 (fr) * 2001-07-11 2003-01-23 Bundesdruckerei Gmbh Procede de production de plaques d'impression helio
CN102892930A (zh) * 2010-03-25 2013-01-23 三菱丽阳株式会社 阳极氧化处理装置、处理槽、压印用辊状模具的制造方法以及在表面具有多个凸部的物体的制造方法
CN102892930B (zh) * 2010-03-25 2015-10-21 三菱丽阳株式会社 压印用辊状模具的制造方法
CN104480506A (zh) * 2014-12-05 2015-04-01 宁波韵升股份有限公司 一种钕铁硼薄片环形产品的电镀工艺

Also Published As

Publication number Publication date
JPH10121291A (ja) 1998-05-12

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