Process and apparatus for the manufacture of sintered tungsten c

Details Process and apparatus for the manufacture of sintered tungsten c Process and apparatus for the manufacture of sintered tungsten c

1980-08-25

1982-07-20

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Press forming apparatus having opposed press members

Pressure applying member mounted for arcuate motion

100218, 425 77, 425441, 4254501, B29C 100, B29C 300

Patent

active

043403506

ABSTRACT:
A press for cold-forming granular tungsten carbide cutting tool edge blanks for sintering, it has helical edges on jaws which open and close around a center pin and are of a depth which allows for shrinkage during sintering, top, bottom and side members seal the forming cavity; a grahite sinter fixture has similarly-shaped forming and sealing components to the press but relies only on gravitational surface reaction to close components against a pressed blank to prevent shrinkage distortion during sintering.

REFERENCES:
patent: 1572724 (1926-02-01), Johnson et al.
patent: 3461506 (1969-08-01), Rice et al.
patent: 3491826 (1970-01-01), Potts
patent: 3932085 (1976-01-01), Horbach

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