Countergravity casting mold and core assembly

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

B - Operations, Transporting

22

D

22/74

B22D 18/06 (2006.01)

Patent

CA 1265311

C-3754 D-9,402 COUNTERGRAVITY CASTING MOLD AND CORE ASSEMBLY Abstract of the Disclosure Apparatus for the countergravity, shell-mold casting process comprising a gas-permeable shell mold seated 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.

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