METHOD OF FORMING PLASTIC MATERIALS
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United States of America Patent
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Nov 3, 2016
app pub date -
Nov 28, 2014
filing date -
Dec 19, 2013
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Abstract
A method of forming a plastic material by using a mold 30 that has a split-mold structure forming air vent (39) in the split surfaces which are the butt surfaces of split molds, the air vent (39) being communicated with gas passages (37), wherein a resin is fed into the mold (30) so as to be formed, and after the formed article is taken out from the mold but before the rein is fed into the mold (30) so as to be formed in the next cycle, a cleaning gas G is fed through the gas passages (37) into the air vent (39) in a state where there is formed at least part of the mold (30) inclusive of the air vent (39), the cleaning gas G being discharged through passages separate from the gas passages (37).
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