Order process:After molding, injection plastic is filled or filled mold cavity dude?, but not compressed by the press.After a time delay, gas was pumped into the region in period 1.In phase 2, gas was pumped in to offset the shrinkage of parts of plastic when cool.Gas pressure is maintained evenly in plastic details.Gas is discharged or drawn out before opening the mold.The SAP can start as soon as the plastic level freezing point or after the nozzle valve closed.
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