Method of forming an electroforming mandrel

Details Method of forming an electroforming mandrel Method of forming an electroforming mandrel

1977-05-09

1978-01-10

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 9, 204 42, C25D 512, C25D 534, C25D 544, C25D 704

Patent

active

040677826

ABSTRACT:
A process for nickel plating a cylindrically shaped hollow core mandrel suitable for chromium plating for use in an electroforming process for the production of endless seamless nickel xerographic belts, is disclosed. The process comprises providing a hollow core aluminum or aluminum alloy cylindrically shaped member and (1) anodizing this core member by using this core member as an anode in an anodizing bath where the cathode comprises lead or lead alloys and (2) nickel plating this anodized core member in a nickel electroforming bath where the core member becomes the cathode and the anode is nickel or nickel alloy. Additionally and optionally, this core member may then be (3) subjected to an acid dip bath where the core member remains for a particular length of time and, additionally, then the core member is (4) plated with chromium by placing the core member in a chromium electroplating bath with a metal anode of lead or lead alloys.

REFERENCES:
patent: 3515650 (1970-06-01), Asada
patent: 3704175 (1972-11-01), MacKinney
patent: 3905400 (1975-09-01), DuPree et al.
patent: 3939046 (1976-02-01), Conn et al.
patent: 3943039 (1976-03-01), Wittrock
patent: 3954568 (1976-05-01), DuPree
patent: 3963587 (1976-06-01), Kreckel

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