Shanghai Daoqin Plastics Co., Ltd.

造 formed color causes is more 方面, main/primary has: equipment 方面 （1） equipment dry 净. or its it powder 尘沉积 in material upper make material material 受污染变 color. （2） hot electrical 偶, temperature or add hot system 失调造 formed temperature 控失灵. （3） machine in has material, easy promote plastics degradation; machine or inner has metal material, abrasion make plastics color. 二 injection molding parts mold 方面 （1） injection molding parts mold gas defect, plastics by hot pressure shrink, in high temperature high pressure lower and oxygen gas reaction, plastics. （2） injection molding parts mold gate small. （3） material in or inner lubricant, demolding agent more. necessary 时应定期清洁 material 筒, remove ratio plastics heat resistant property also anti-static property and other additives. （4） nozzle 孔, runner and separation runner dimensions small. process 方面 （1） screw speed high, back pressure large. （2） machine 筒, nozzle temperature degree high. （3） injection pressure high, time long, injection speed degree fast make products color. raw materials 方面 （1） material material by 污染. （2） water separation and material content high. （3） color agent, additives separation understanding.