Electrolysis: processes – compositions used therein – and methods – Electrolytic erosion of a workpiece for shape or surface... – Aperture making
Patent
1996-11-08
1998-04-14
Valentine, Donald R.
Electrolysis: processes, compositions used therein, and methods
Electrolytic erosion of a workpiece for shape or surface...
Aperture making
204290R, B23H 914
Patent
active
057387770
ABSTRACT:
The invention relates to a method of providing one or more through-holes in a metal workpiece by means of an electrochemical machining apparatus (ECM apparatus). Said method is characterized in that the surface of the workpiece from which the electrode of the ECM apparatus emerges is provided with an auxiliary layer, which comprises a polymeric network composed of organic and inorganic fragments. In this manner, rounding at the boundary between the holes formed and the exit surface of the ECM electrode is precluded. A polymeric network comprising silicon oxide and zirconium oxide as well as carbon-containing fragments, which are incorporated in the polymeric network via SiC bonds, are preferred.
The invention can very advantageously be used to manufacture shaving foils and shaving combs.
REFERENCES:
patent: 3196093 (1965-07-01), Williams
patent: 3383296 (1968-05-01), Trager
patent: 3386907 (1968-06-01), Abt
patent: 3421997 (1969-01-01), Williams
patent: 3749654 (1973-07-01), Mikulski
patent: 4705615 (1987-11-01), Hoffmann
"Ultrastructure Processing of Advanced Ceramics", H. Schmidt et al., 1988, John Wiley & Sons, pp. 651-660.
Bliek Marinus
Brussee Maarten
Bartlett Ernestine C.
U.S. Philips Corporation
Valentine Donald R.
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