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Title:
MANUFACTURE OF FORMING DIE
Document Type and Number:
Japanese Patent JPS60228699
Kind Code:
A
Abstract:
PURPOSE:To obtain a forming die having fine unevenness of high accuracy and superior releasability by forming a film on the forming surface of the forming die for forming diaphragm parts for a speaker by composite plating in an electrolytic soln. prepd. by dispersing fine particles of a fluorine compound in an Ni plating bath. CONSTITUTION:Fine particles 2 of the fluorine compound are dispersed in an Ni plating bath 1 and enveloped in Ni plating 3 to form composite plating 5. The forming die 4 is immersed in the plating bath 1, and the film 6 is formed on the surface of the die 4 by composite plating using the die 4 as a positive electrode and the composite plating 5 as a negative electrode. The formed film 6 is very thin and has high wear resistance and releasability.

Inventors:
YONETANI YOSHIAKI
Application Number:
JP8434184A
Publication Date:
November 13, 1985
Filing Date:
April 25, 1984
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
B21D37/20; B29C33/38; B29C33/56; C25D15/02; B29L31/38; (IPC1-7): B21D37/20; B29C33/38; B29C33/56; B29L31/38; C25D15/02
Domestic Patent References:
JP56086115B