Watch exterior parts and manufacturing method thereof

Details Watch exterior parts and manufacturing method thereof Watch exterior parts and manufacturing method thereof

1992-05-28

1995-04-04

Mai, Ngoclan T.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75239, 75240, 75244, 75246, 419 13, 419 14, 419 16, 419 18, 419 23, 419 33, 419 36, 419 38, 419 57, 419 60, C22C 2904, B22F 100

Patent

active

054033748

ABSTRACT:
A watch exterior part is formed of cemented carbide or stellite alloy, and has a three-dimensionally curved as-sintered surface or a small hole with an as-sintered interior peripheral surface, or has a three-dimensionally curved polished surface obtained by polishing an as-sintered surface. The watch exterior part is manufactured by a method in which organic binder is milled into a material powder, and a molded body obtained by injection molding is subjected to a binder removing process and then sintered. By the manufacturing method, a watch exterior part formed of cemented carbide or stellite alloy has a high strength and a complicated configuration such as a three-dimensional curved surface and a small hole, without applying secondary machining operations such as discharge operations.

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