Metal founding – Means to apply vacuum directly to work or to hold or... – Means applying vacuum or suction directly to molten casting...
Patent
1988-02-26
1989-05-16
Lin, Kuang Y.
Metal founding
Means to apply vacuum directly to work or to hold or...
Means applying vacuum or suction directly to molten casting...
B22D 1806
Patent
active
048300853
ABSTRACT:
A lost foam casting system (2) is provided with vacuum lift of molten metal (16) to an evaporative foam pattern assembly (8) surrounded by unbonded particulate media such as sand (6) in a flask (4). A gas permeable member (34, 70) or passage (72, 74) is provided between the sand and a vertical fill passage (20) to apply vacuum from the sand to the fill passage such that molten metal is vacuum lifted through the fill passage to the foam pattern assembly, such that the foam material vaporizes as the molten metal advances upward and is replaced by the metal in the shape of the pattern assembly.
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Robert K. Buhr, "Panel: The Evaporative Foam Casting Process-Looking to the Future and New Technologies", Evaporative Foam Casting Technology II Program, Nov. 12-13, 1986, pp. 179-184.
Erza L. Kotzin, "Metalcasting & Molding Processes", Cast Metal Series, An American Foundrymen's Society Publication, Des Plaines, Ill. 1981.
Cleary Terrance M.
Donahue Raymond J.
Hesterberg William G.
Toriello Lawrence I.
Brunswick Corporation
Lin Kuang Y.
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