Shanghai Daoqin Plastics Co., Ltd.

according to bubbles generate causes, solution countermeasures has below/following several 方面: （1） in products thick relatively large 时, its outer surface cooling speed degree ratio in fast, therefore, cooling 进行, in resin shrinkage toward surface expand 张, make in generate short shot. this type of by is true bubbles. solution methods main/primary has: a） according to thick, combined gate, dimensions. generally gate high degree is products thick 50％~60％. b）至 gate combined is 止, has 一定 补充 injection material. c） injection time relatively gate combined time long. d） reduce injection speed degree, improve/increase injection pressure, e） using/adopting melt viscosity and other grade high material. （2） due to property gas generate formed bubbles, solution methods main/primary has: a）充 separation 进行预 drying. b） reduce resin temperature degree, generate separation understanding gas 体. （3） flow property formed bubbles, can through improve/increase resin and injection molding parts mold temperature degree, improve/increase injection speed degree solution