Shanghai Daoqin Plastics Co., Ltd.

         mold main/primary is for parts 进行研 made tool, its in parts injection molding process in,我们会发现一 bubbles formed, injection molding in bubbles easy 导致工 parts 熔炼痕,而导致 this type of phenomenon generate causes and solution measures, in standards parts 网进行 detailed introduction.

         causes 一: in products thick relatively large 时, its outer surface cooling speed degree ratio in fast, therefore,随 cooling 进行, in resin shrinkage toward surface expand 张, make in generate short shot. this type of by is true bubbles.

         solution measures main/primary has:

        1, according to thick,确定 combined gate,浇道 dimensions. generally gate high degree is products thick 50%~60%.

        2, gate combined is 止,留 has 一定 补充 injection material.

        3, injection time relatively gate combined time long.

        4, reduce injection speed degree, improve/increase injection pressure.

        5, using/adopting melt viscosity and other grade high material.

         causes 二: due to property gas generate formed bubbles.

         solution measures main/primary has:

        1, separation 进行预 drying.

        2, reduce resin temperature degree,避免 generate separation understanding gas 体.

        3, flow property formed bubbles, can through improve/increase resin and mold temperature degree, improve/increase injection speed degree solution.