Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1996-12-02
1998-08-04
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164113, 164312, 164900, B22D 1710
Patent
active
057879591
ABSTRACT:
High strength to weight ratio, improved dimensional and surface quality hollow metal moldings are formed by injecting thixotropic, semi-solid metal billets as a "short shot" into a mold cavity; introducing an inert gas into the charge under pressure to force the metal into full and faithful contact with cavity surfaces and to form a hollow portion in the molding; maintaining the pressure of the gas on the charge in the cavity until the metal has solidified and then venting the gas for molded product removal.
REFERENCES:
patent: 4101617 (1978-07-01), Friederich
patent: 4106956 (1978-08-01), Bercovici
patent: 4694881 (1987-09-01), Busk
patent: 4694882 (1987-09-01), Busk
patent: 4923667 (1990-05-01), Sayer
patent: 5009844 (1991-04-01), Laxmanan
patent: 5040589 (1991-08-01), Bradley et al.
"Thixocasting of Steel", 9th SDCE international die casting Exposition & Congress, Flemings et al, Jun. 6-9, 1977.
Hoye Robert James
Laxmanan Venkatasubramanian
Raisoni Jayprakash Uttamchand
Shah Suresh Deepchand
General Motors Corporation
Grove George A.
Lin Kuang Y.
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