Countergravity casting mold and core assembly

Details Countergravity casting mold and core assembly Countergravity casting mold and core assembly

1985-11-27

1987-02-10

Godici, Nicholas P.

Metal founding

Means to apply vacuum directly to work or to hold or...

Means applying vacuum or suction directly to molten casting...

164306, 164340, 164361, 164365, B22D 1806

Patent

active

046417036

ABSTRACT:
Apparatus for the countergravity, shell-mold casting process comprising a gas-permeable shell mold sealed in the mouth of a vacuum chamber and a hollow, expendable, gas-permeable, thermally degradable, core disposed with the molding cavity for engulfment and retention by the metal being cast. The core defines a central evacuation cavity and an unobstructed vent for exhausting the evacuation cavity into the vacuum chamber such that the pressure in the evacuation cavity is substantially equal to that in the vacuum chamber during casting.

REFERENCES:
patent: 1298373 (1919-03-01), Mott, Jr. et al.
patent: 1531445 (1925-03-01), Lake
patent: 2312796 (1943-03-01), Campbell
patent: 3540516 (1970-11-01), Taccone
patent: 4340108 (1982-07-01), Chandley et al.

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