Gas-venting arrangement incorporated with a mold

Details Gas-venting arrangement incorporated with a mold Gas-venting arrangement incorporated with a mold

1980-09-19

1984-02-14

Hampilos, Gus T.

Metal founding

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

164305, 164410, 425420, 425812, B22D 1714, B22D 1720

Patent

active

044310471

ABSTRACT:
An arrangement incorporated with a mold for use in a die casting machine or an injection mold machine comprising: a gas vent passage formed in the mold communicating with a cavity of the mold; two symmetrical by-pass passages branched from the gas vent passage; a gas discharge passage communicating with the outside of the mold; and valve means including a valve chamber formed in the mold having a valve located therein and communicating with the above-mentioned passages. The valve in a first position cooperates with the valve chamber to prevent the gas vent passage from communicating with the gas discharge passage, but prevents both the gas vent passage and the by-pass passages from communicating with the gas discharge passage when in a second position. A portion of the melt forced to flow from the cavity through the gas vent passage upon impingement of that portion of the melt against the valve drives the valve from the first position to the second position before any of the melt forced to flow through the by-pass passages reaches the valve chamber.

REFERENCES:
patent: 2785448 (1957-03-01), Hodler
patent: 2867869 (1959-01-01), Hodler
patent: 3349833 (1967-10-01), Hodler
patent: 3433291 (1969-03-01), Hodler
patent: 3855618 (1975-05-01), Hodler
patent: 3892508 (1975-07-01), Hodler
patent: 3991971 (1976-11-01), Drake
patent: 4027726 (1977-06-01), Hodler
patent: 4239080 (1980-12-01), Hodler

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