Apparatus and method for use in casting

Details Apparatus and method for use in casting Apparatus and method for use in casting

1990-01-22

1991-09-17

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164133, 164361, B22C 908, B22D 2704

Patent

active

050485911

ABSTRACT:
During the casting of reactive metals, the depletion of reactive elements from molten metal in an article mold cavity is prevented by blocking a feeder passage after filling an article mold cavity with the molten metal. To block the feeder passage, a valve member is floated on the molten metal. As the level of the molten metal rises, the valve member moves into sealing engagement with a valve seat. To make a mold structure containing the valve member, the valve member is positioned in a pattern of the mold structure. After covering the pattern with ceramic mold material, the pattern is removed to leave the valve member in the mold structure.

REFERENCES:
patent: 4961455 (1990-10-01), Redemske et al.

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