Title:
MANUFACTURE OF TIMEPIECE CASE
Document Type and Number:
Japanese Patent JPS5987947
Kind Code:
A
Abstract:
PURPOSE: To complete a timepiece case which satisfies sufficiently strength, corrosion resistance and an external appearance by a small number of processes by using zinc containing aluminum and magnesium of a specified quantity, heating it to a prescribed temperature, and executing the forging.
CONSTITUTION: A desired timepiece case is manufactured by using zinc for forging, which contains 4% aluminum and 0.04% magnesium, heating it to a temperature of 150W250°C, and performing hot forging. In this way, a timepiece case which is free from a defect such as a blow-hole, etc., also has a high completion degree, and to which it is unnecessary to execute the surface finishing can be manufactured by one process.
Inventors:
IWANO KENJI
WATANABE HIROBUMI
MISAWA TAKASHI
WATANABE HIROBUMI
MISAWA TAKASHI
Application Number:
JP19937982A
Publication Date:
May 21, 1984
Filing Date:
November 13, 1982
Export Citation:
Assignee:
KAWAGUCHIKO SEIMITSU KK
International Classes:
B21K23/00; G04B37/22; (IPC1-7): B21K23/00
Attorney, Agent or Firm:
Kojiro Kawai
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