Shanghai Daoqin Plastics Co., Ltd.

         injection molding products color causes analysis and solution methods:  

        (1) color agent expand dispersion defect, this type of 情况往往 make gate 附近出现花纹.

        (2) plastics or color agent heat stabilized property 差, need stability made parts color 调, need solid production conditions, especially is material temperature, material amount and production cycle.

        (3) for crystallization type plastics, amount make made parts separation cooling speed degree 一致, for/regarding thick large made parts, can use color agent Color Difference, for/regarding thick relatively uniform made parts need solid good material temperature and mold temperature.

        (4) made parts type and gate 形式, for plastics 充填情况 has effect/influence, make made parts certain local generate Color Difference, necessary need 进行修改.

         injection molding products color and gloss defect causes analysis positive 常情况 lower, injection molding made parts surface tool has gloss main/primary plastics type type, color agent and light degree 决定. 但经常也会因 is other causes formed products surface color and gloss defect, surface dark color and other defect.

         other causes and solution methods analysis lower:

        (5) mold light degree 差, type surface has and other, mold gas defect.

        (6) mold system has defect, increase large cold material 井, increase large runner, light runner, separation runner and gate.

        (7) material temperature and mold temperature low, necessary can use gate local add hot method.

        (8) processing pressure low, speed degree slow, injection time 不足, back pressure 不足, formed property make surface dark color.

        (9) plastics need separation 塑化, need anti material degradation, hot need stability, cooling need separation, especially is thick 壁.

        (10) anti cold material made parts, necessary use 自锁式 elastic or reduce nozzle temperature degree.

        (11) use recycled material more, plastics or color agent quality 差, mixed has water or its it 杂质, use lubricant quality 差.

        (12) clamping force need 足够.