Low-pressure isostatic casting process and machine

Details Low-pressure isostatic casting process and machine Low-pressure isostatic casting process and machine

1986-06-11

1988-02-23

Godici, Nicholas P.

Metal founding

Process

Shaping liquid metal against a forming surface

164257, 164285, 164309, B22D 1800

Patent

active

047264144

ABSTRACT:
In this low-pressure casting process a mold is filled from the bottom with a liquid metal or alloy contained in a hermetically sealed furnace. The metal or alloy is forced into the mold through an injection tube by a pressurized fluid. A crucible containing the metal or alloy in the furnace is separated from electrical heating elements and thermally insulative parts by a sealed metal inner jacket supporting the crucible. Fluid is fed from the side of the inner jacket opposite the crucible throughout the casting operation, until the cast part has solidified. The pressure of this fluid is varied according to the pressure above the surface of the metal or alloy in the crucible, so as to maintain a pressure balance at all times between the inside and the outside of the inner jacket.

REFERENCES:
patent: 4526222 (1985-07-01), Itelg
patent: 4550763 (1985-11-01), Nikolov

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