Shanghai Daoqin Plastics Co., Ltd.

         has plastics made parts in molding demolding rear, very fast in metal parts or in especially thick 部位出现肿胀 or 鼓泡. this is is full cooling hard plastics in inner pressure function lower gas 体膨胀造 formed.

         solution measures:

        1. has cooling. reduce mold temperature, long mold opening time, reduce material drying and processing temperature degree.

        2. reduce speed degree, decrease/reduce formed cycle, decrease/reduce flow retardant force.

        3. improve/increase holding pressure pressure and time.

        4. improvement made parts 壁面太 thick or thick thin large 状况.

         injection molding products causes analysis

        PS and other rigid property plastics made parts in its gate surface, gate is in 心 形 formed 密集 波纹, has is 震纹.

         generate causes is melt viscosity large 而以滞流形式充模时, front material 一接触 to type surface very fast cold shrinkage 起, rear material also already shrinkage cold material front process 不断交替 make material in front in formed surface 震纹.

         solution methods:

        (1) improve/increase material temperature degree especially is temperature degree, also improve/increase mold temperature degree.

        (2) improve/increase injection pressure and speed degree, make its fast speed type 腔.

        (3) improvement runner, gate dimensions, anti retardant force large.

        (4) mold gas need good, need 设置足够 large cold material 井.

        (5) made parts need design thin.