EP0148377A2 - Electroformage de matrices en nickel - Google Patents

Electroformage de matrices en nickel Download PDF

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Publication number
EP0148377A2
EP0148377A2 EP84113994A EP84113994A EP0148377A2 EP 0148377 A2 EP0148377 A2 EP 0148377A2 EP 84113994 A EP84113994 A EP 84113994A EP 84113994 A EP84113994 A EP 84113994A EP 0148377 A2 EP0148377 A2 EP 0148377A2
Authority
EP
European Patent Office
Prior art keywords
nickel
free
bath
additive
electrolyte
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.)
Granted
Application number
EP84113994A
Other languages
German (de)
English (en)
Other versions
EP0148377A3 (en
EP0148377B1 (fr
Inventor
Johann Becker
Hermann Dr. Rer. Nat. Koop
Hans Schüddekopf
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.)
Polygram GmbH
Original Assignee
Polygram 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 Polygram GmbH filed Critical Polygram GmbH
Priority to AT84113994T priority Critical patent/ATE53865T1/de
Publication of EP0148377A2 publication Critical patent/EP0148377A2/fr
Publication of EP0148377A3 publication Critical patent/EP0148377A3/de
Application granted granted Critical
Publication of EP0148377B1 publication Critical patent/EP0148377B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
    • C25D3/14—Electroplating: Baths therefor from solutions of nickel or cobalt from baths containing acetylenic or heterocyclic compounds
    • C25D3/16—Acetylenic compounds
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/10—Moulds; Masks; Masterforms

Definitions

  • the invention relates to a nickel electroplating in the form of a press or embossing die for the production of plate or sheet-shaped information carriers using an embossing, pressing, injection molding or transfer molding technique.
  • Pressing or embossing matrices for clay and picture plates are known to be produced by electroplating in nickel baths.
  • the use of nickel baths proves to be advantageous in that, at a high deposition rate, relatively low-tension precipitates can be deposited, which are absolutely necessary for the impression of the microscopic surface structure containing the information.
  • a disadvantage is the relatively rough surface that occurs on the back of the electroplating, the pimple-like bumps of which lead to metal abrasion due to mutual friction in the die attached directly to the press mold. This one. Metal abrasion then usually collects into small piles that press against the die from behind and cause corresponding "bumps" on the die surface.
  • the invention is based on the object of specifying a surface structure for the back of a galvanically manufactured nickel, pressed or embossing die which increases the number of operating press cycles for such a die to at least 1000.
  • a roughness of the information-free back of the nickel die with spherically rounded elevations of the crystallite surfaces not only creates excellent sliding properties on the surface of the press mold but also enables the incorporation of metal abrasion in the cavities remaining between the crystallite surfaces , so that such nickel matrices can usually be used for more than 1000 pressing cycles, before the die shows the signs of wear already mentioned in the introduction and has to be replaced with a new die.
  • an additive-free electrolytic bath for example nickel sulfamate bath
  • an additive-free electrolytic bath for example nickel sulfamate bath
  • an acid-proof, elastic and Protective layer based on a polyvinyl resin in an electric polishing bath with an electrolyte composition of 40% H 3 P0 4 , 50% H 2 S0 4 and 10% H 2 0 polished on the back.
  • a nickel matrix by galvanic means use is made of primary and / or secondary additives in the electrolytic bath.
  • a nickel sulfamate electrolyte eg high speed
  • 50 to 120 mg / Ltr butynediol additive gives the desired rear surface structure at a cathode current density (KD in A / dm 2 ) for both nickel pre-deposition and for the main nickel deposition within the limits KD ⁇ 8 KD ⁇ 60.
  • the nickel pre-deposition takes place in an additive-free nickel sulfamate electrolyte with a cathode current density of up to 6 A / dm 2 .
  • the main nickel deposition is then carried out in a nickel sulfamate electrolyte with 50 to 120 mg / liter of butynediol additive at a cathode current density of up to approx. 60 A / dm 2 .
  • the information structure on the front side 2 corresponds to a digital audio disc in which the digital information is specified in the form of successive depressions 3 and elevations 4.
  • the rear side 5 has a surface roughness R which is ⁇ 1 ⁇ m, the crystallite surfaces having spherically rounded elevations 6.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Chemically Coating (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
EP84113994A 1983-11-22 1984-11-19 Electroformage de matrices en nickel Expired - Lifetime EP0148377B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113994T ATE53865T1 (de) 1983-11-22 1984-11-19 Nickelgalvano in form einer press- oder praegematrize.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833342160 DE3342160A1 (de) 1983-11-22 1983-11-22 Nickelgalvano in form einer press- oder praegematrize
DE3342160 1983-11-22

Publications (3)

Publication Number Publication Date
EP0148377A2 true EP0148377A2 (fr) 1985-07-17
EP0148377A3 EP0148377A3 (en) 1988-02-17
EP0148377B1 EP0148377B1 (fr) 1990-05-02

Family

ID=6214932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113994A Expired - Lifetime EP0148377B1 (fr) 1983-11-22 1984-11-19 Electroformage de matrices en nickel

Country Status (3)

Country Link
EP (1) EP0148377B1 (fr)
AT (1) ATE53865T1 (fr)
DE (2) DE3342160A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993025732A1 (fr) * 1992-06-16 1993-12-23 Kernforschungszentrum Karlsruhe Gmbh Outil et procede pour la fabrication d'une couche en matiere plastique microstructuree

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643459A1 (de) * 1976-09-27 1978-03-30 Polygram Gmbh Verfahren zur oberflaechenglaettung der rueckseite von press- oder praegematrizen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643459A1 (de) * 1976-09-27 1978-03-30 Polygram Gmbh Verfahren zur oberflaechenglaettung der rueckseite von press- oder praegematrizen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993025732A1 (fr) * 1992-06-16 1993-12-23 Kernforschungszentrum Karlsruhe Gmbh Outil et procede pour la fabrication d'une couche en matiere plastique microstructuree
US5676983A (en) * 1992-06-16 1997-10-14 Kernforschungszentrum Karlsruhe Gmbh Tool for making a microstructured plastic mold
US5795519A (en) * 1992-06-16 1998-08-18 Kernforschungszentrum Karlsruhe Gmbh Process of making a microstructured plastic mold

Also Published As

Publication number Publication date
ATE53865T1 (de) 1990-06-15
EP0148377A3 (en) 1988-02-17
DE3482125D1 (de) 1990-06-07
EP0148377B1 (fr) 1990-05-02
DE3342160A1 (de) 1985-05-30

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