Vacuum casting apparatus

Details Vacuum casting apparatus Vacuum casting apparatus

1994-06-29

1995-10-03

Batten, Jr., J. Reed

Metal founding

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

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

164306, 164319, B22D 1802, B22D 1804

Patent

active

054544165

ABSTRACT:
A vacuum casting apparatus in which a molding cavity is reduced in pressure substantially to a vacuum, and upon opening a gate, a molten metal which has been raised to a molten metal retaining dome is charged into the molding cavity via a runner at a high speed. The runner has a first portion making a pool of molten metal, a second portion connecting the molten metal retaining dome to the first portion, and a third portion connecting the first portion to the molding cavity. A pin is slidably provided in the first portion of the runner. An opening of the second portion of the runner to the first portion is located nearer to the pin than an opening of the third portion of the runner to the first portion. When the pin is moved into the first portion of the runner, the pin first closes the opening of the second portion and then begins to apply pressure the molten metal in the molding cavity.

REFERENCES:
Abstract of Japan vol. 17, No. 618 Re: JP-A-05-192 759 Published Aug. 3, 1993.

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