Method for molding of powders

Details Method for molding of powders Method for molding of powders

1987-10-08

1990-05-22

Derrington, James

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Heat and pressure simultaneously to effect sintering

264102, 264313, 264317, 264517, 264DIG78, 419 68, B22F 100

Patent

active

049276000

ABSTRACT:
The invention is concerned with the method of compression molding a metallic or ceramic powders. The method includes the step of maintaining a negative pressure within a first mold of noncompactable powders for intimately contacting on its inner surface a pouch-like member of thin-walled resilient material for producing a second mold, and the step of compactly charging starting powders into the second mold and exhausting air from and sealing the second mold, taking out a pre-molded body of the metallis or ceramic powders together with the second mold and the step of processing the pre-molded body by a cold or hot isostatic press.

REFERENCES:
patent: 2129240 (1938-09-01), Sanborn
patent: 2513785 (1950-07-01), Browne et al.
patent: 4582682 (1986-04-01), Betz
patent: 4612163 (1986-09-01), Nishio et al.

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