Gas-venting arrangement incorporated with a mold

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

B - Operations, Transporting

29

C

18/1197, 22/140

B29C 33/10 (2006.01) B22D 17/14 (2006.01)

Patent

CA 1151377

GAS-VENTING ARRANGEMENT INCORPORATED WITH A MOLD ABSTRACT OF THE DISCLOSURE 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 ofrmed in the mold and a valve located therein and communicating with the above- -mentioned passages. The valve cooperates with the valve chamber so that is prevents the gas vent passage from communicating with the gas discharge passage when it is in a first position and prevents both the gas vent passage and the by-pass passages from communicating with the gas discharge passage when it is in a second position. The valve is driven by a melt forced to flow from the cavity through the gas vent passage upon impingement of the melt against the valve to move from the first position to the second position before a part of the melt forced to flow through the by-pass passages reaches the valve chamber.

360858

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