Vacuum casting method and vacuum casting apparatus

Details Vacuum casting method and vacuum casting apparatus Vacuum casting method and vacuum casting apparatus

1996-01-25

1998-01-13

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164255, B22D 1806

Patent

active

057068801

ABSTRACT:
An apparatus and method for casting metal in an evacuated mold cavity. The apparatus has a preferential suction zone through which a mold can be preferentially and effectively evacuated and a suction head sealingly fitting the upper surface of the mold. To the apparatus, is further provided a pressing means for pressing, in cooperation with the suction head, the mold against the inner bottom surface of a mold support chamber. By evacuating the mold through the preferential suction zone while pressing the mold to the bottom of the mold support chamber, a mold cavity is easily filled with a molten metal in such a manner to avoid casting defects such as insufficient filling, blow hole, surface fold, under fill, etc.

REFERENCES:
patent: 4340108 (1982-07-01), Chandley et al.
patent: 4606396 (1986-08-01), Chandley et al.
patent: 4791977 (1988-12-01), Chandley
patent: 4957153 (1990-09-01), Chandley
patent: 5044420 (1991-09-01), Vanderjagt
patent: 5069271 (1991-12-01), Chandley et al.
patent: 5174356 (1992-12-01), Vanderjagt
patent: 5509458 (1996-04-01), Onuma et al.

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