Vacuum-assisted gravity pour casting apparatus

Details Vacuum-assisted gravity pour casting apparatus Vacuum-assisted gravity pour casting apparatus

1993-03-05

1994-10-25

Lin, Kuang Y.

Metal founding

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

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

164254, 164258, B22D 1800

Patent

active

053580273

ABSTRACT:
A vacuum-assisted gravity pour casting apparatus (10) has a vacuum housing (12) with a fixed top portion (14) and a moveable bottom portion (16). A lower portion (80) of a filling vessel (62) extends through an opening (30) in the top portion (14) and seals the opening (30) against leakage. The bottom housing portion (16) is supported on a scissors-lift mechanism (48) which lowers and raises the bottom portion (16) to open and close the chamber (20) for cycling molds into and out of the chamber (20). A stopper rod (86) controls the flow of molten metal (M) through a bottom nozzle (70) and into the mold.

REFERENCES:
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patent: 2871533 (1959-02-01), Swainson
patent: 2976587 (1961-03-01), Daussan
patent: 3013316 (1961-12-01), Hornak et al.
patent: 3517728 (1970-06-01), Taccone
patent: 3536125 (1970-10-01), Blasko et al.
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patent: 4055216 (1977-10-01), Ulyanov et al.
patent: 4541475 (1985-09-01), Goddard et al.
patent: 5230379 (1993-07-01), Voss

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