Method of molding powders of metal, ceramic and the like

Details Method of molding powders of metal, ceramic and the like Method of molding powders of metal, ceramic and the like

1985-08-23

1986-09-16

Lechert, Jr., Stephen J.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Consolidation of powders

249 65, 249112, 249183, 264571, 264DIG78, 425405H, 425DIG14, B22F 100

Patent

active

046121633

ABSTRACT:
A method of compression molding powders of metals, ceramics and the like. A thin rubber bag is adhered to the inside of a cavity formed within a permeable mold support so as to define a mold therein and the bag is packed with a raw material powder. The powder in the bag is evacuated to a degree of vacuum to compactly compress it and the rubber bag is sealed. In this condition, the compressed powder is removed from the support and compression molded to a higher degree of denseness by the CIP process. The inflation adhesion of the rubber bag to the inside of the support cavity is effected by reducing the pressure outside the permeable support.

REFERENCES:
patent: Re31355 (1983-08-01), Rozmus
patent: 3523148 (1970-08-01), Boyer et al.
patent: 3577635 (1971-05-01), Bergman et al.
patent: 3956452 (1976-05-01), Saito
patent: 4271114 (1981-06-01), Ohno

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