Metal founding – Process – Shaping a forming surface
Patent
1998-03-09
1999-12-07
Lin, Kuang Y.
Metal founding
Process
Shaping a forming surface
164 36, 164 44, 164132, B22C 702, B22C 904
Patent
active
059966823
ABSTRACT:
A mold for a prototype metal casting or the like may advantageously be made by forming a casting pattern of adhesively bonded aggregate particles using a binder containing a principle constituent that is soluble in supercritical carbon dioxide; forming a rigid shell mold about the pattern of materials that are unaffected by supercritical carbon dioxide; thereafter exposing the pattern and mold combination to supercritical carbon dioxide to remove the pattern binder adhesive and leave unbonded aggregate particles in the mold and removing the aggregate particles from the mold to leave a mold cavity that faithfully defines the pattern shape.
REFERENCES:
patent: 4824570 (1989-04-01), Bethuel et al.
patent: 5860467 (1996-12-01), DeSimone et al.
Cai Mei
Sargent Nicholas Edward
Schreck Richard Michael
Siak June-Sang
General Motors Corporation
Grove George A.
Lin Kuang Y.
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