Vacuum countergravity casting apparatus and method with backflow

Details Vacuum countergravity casting apparatus and method with backflow Vacuum countergravity casting apparatus and method with backflow

1988-08-30

1989-09-05

Godici, Nicholas P.

Metal founding

Process

Shaping liquid metal against a forming surface

164255, 164337, B22D 1806

Patent

active

048629456

ABSTRACT:
An apparatus for the vacuum, countergravity casting of molten metal includes a bottom drag member and a casting mold member thereon engaged together at a parting plane. A valve member is disposed adjacent the parting plane in an ingate to a mold cavity formed at least in part in the casting mold member and is movable between a valve seat on the bottom drag member and a stop surface on the casting mold member to permit filling of the mold cavity in countergravity manner from an underlying molten metal pool when the bottom drag member is immersed therein and to prevent backflow of the molten metal from the mold cavity when the bottom drag member is withdrawn from the pool after mold filling and before solidification of the molten metal in the mold cavity.

REFERENCES:
patent: 2908054 (1959-10-01), Wilkins
patent: 3774668 (1973-11-01), Heimgartner
patent: 4340108 (1982-07-01), Chandley et al.
patent: 4589466 (1986-05-01), Chandley et al.
patent: 4606396 (1986-08-01), Chandley et al.

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