Method of producing hollow electroformed product of precious met

Details Method of producing hollow electroformed product of precious met Method of producing hollow electroformed product of precious met

1996-02-07

1998-11-17

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electroforming or composition therefor

Roll, ring, or hollow body

C25D 102

Patent

active

058371184

ABSTRACT:
A method of producing a hollow electroformed product of precious metal includes the steps of forming a hollow soluble metal electroformed layer soluble in an inorganic acid on the outer surface of a master model formed of a low melting point material or a chemically soluble material soluble in a chemical, melting or dissolving and removing the master model from inside the soluble metal electroformed layer, coating the outer surface of the remaining soluble metal electroformed layer with a masking layer, forming a precious metal electroformed layer on the inner surface of the soluble metal electroformed layer, stripping the masking layer, and dissolving the soluble metal electroformed layer with inorganic acid.

REFERENCES:
patent: 1219466 (1917-03-01), Kirk
patent: 4255237 (1981-03-01), Obert
patent: 4343684 (1982-08-01), Lechtzin
patent: 4373933 (1983-02-01), Grazen
patent: 4737162 (1988-04-01), Grazen

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