Countergravity casting apparatus

Details Countergravity casting apparatus Countergravity casting apparatus

1988-06-24

1989-05-02

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...

164306, 164341, B22D 1806

Patent

active

048259330

ABSTRACT:
Apparatus for the vacuum countergravity casting of metal in shell molds including a gas-permeable upper shell mold portion secured to a bottom mold portion and together secured to the mouth of a vacuum box by a plurality of threadable mounting sites engaged by self-tapping threads on the ends of rotatable shafts reciprocally slidable through the ceiling of the box. Each shaft has a stop fixed thereto at a predetermined distance above the threads for pressing the upper shell mold portion into sealing engagement with the bottom mold portion in order to eliminate the need to glue the upper and lower mold portions together.

REFERENCES:
patent: 2379401 (1945-06-01), Poulter
patent: 3774668 (1973-11-01), Iten et al.
patent: 4340108 (1982-07-01), Chandley et al.
patent: 4508157 (1985-04-01), Belliveau et al.
patent: 4632171 (1986-12-01), Almond
patent: 4658880 (1987-04-01), Voss

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