Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Consolidation of powder prior to sintering
Patent
1984-11-26
1986-07-08
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Consolidation of powder prior to sintering
419 38, 419 49, 419 66, 419 67, 419 68, 264572, 425 78, 425405R, 425405H, 425408, B22F 100
Patent
active
045992150
ABSTRACT:
A hermetically sealed capsule (10) containing degased metal powder (11) is embedded in a soft metal flow die (20). Subsequently the flow die (20) is compressed in a cavity block, thereby compressing the metal powder (11) by the hydrostatic pressure of the flow die and simultaneously shaping the said powder. This results in the reforming of the structure right down to the interior of the particles with compression of up to 100%. The shaping process can be aided by moulding dies (17, 18) embedded in the flow die (10) around the capsule (10) at a distance from each other and, when closed, forming a cavity, the shape of which deviates from that of the original shape of the capsule (10). The capsule (10) containing the metal powder is formed during closure of the moulding cavity.
REFERENCES:
patent: 2783504 (1957-03-01), Hamjian et al.
patent: 2847708 (1958-08-01), Hamjian et al.
patent: 3577635 (1971-05-01), Bergman et al.
patent: 3771221 (1973-11-01), Bachmann et al.
patent: 4435360 (1984-03-01), Trottier et al.
Grundhoff Karl J.
Schurmann Hartmut
Smarsly Wilfried
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