Method of producing molded parts by cold isostatic compression

Details Method of producing molded parts by cold isostatic compression Method of producing molded parts by cold isostatic compression

1984-07-31

1986-04-15

Lechert, Jr., Stephen J.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Consolidation of powders

419 38, 419 39, 419 42, 419 49, 419 60, 419 66, 264101, 264109, 264DIG78, 425 78, 425405H, 425DIG44, B22F 100

Patent

active

045826820

ABSTRACT:
A thin-walled elastic envelope or mold element is arranged within a divisible outer supporting mold of porous material and a vacuum is applied to the outer supporting mold. Thereupon powdered metal or ceramic is introduced into the elastic mold element and the mold element is closed and pressurized to form a preform. The preform is then subjected to cold isostatic pressurization which is applied to the outer surface of the elastic mold element. Prior to the cold isostatic pressurization, the vacuum applied to the outer supporting mold is terminated and a vacuum is produced within the elastic mold element.

REFERENCES:
patent: 3383208 (1968-05-01), Corral
patent: 3531848 (1970-10-01), Gripshover et al.
patent: 3577635 (1971-05-01), Bergmann et al.
patent: 3929476 (1975-12-01), Kirby et al.
patent: 3956452 (1976-05-01), Saito
patent: 4526747 (1985-07-01), Schimmel et al.

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