Vacuum casting apparatus and method

Details Vacuum casting apparatus and method Vacuum casting apparatus and method

1994-07-08

1995-06-27

Batten, Jr., J. Reed

Metal founding

Process

Shaping liquid metal against a forming surface

164119, 164120, 164254, 164306, B22D 1802, B22D 1804

Patent

active

054271703

ABSTRACT:
A vacuum casting apparatus includes a plurality of pressure pins arranged in a molding cavity, and at least one pressure pin is located in a portion of the molding cavity farthest from a gate. The pressure pins are operated to pressurize the molding cavity in an order from the pressure pin located farthest from the gate to a pressure pin located nearest to the gate. A cross-sectional area reduced portion can also be formed in a portion of a runner connecting the molding cavity and the molten metal retaining dome. A molten metal in the molding cavity is thereby suppressed from flowing backward into the molten metal retaining dome when being pressurized by the pressure pins, so that the quality of the cast products is improved.

REFERENCES:
patent: 1697741 (1929-01-01), Vaughan
Patent Abstract of Japan No. 5-192759 published Aug. 3, 1993.

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