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formed plastics products has has 烧焦 dark causes
Date: 2019-11-25 03:40
Views: 2368
Source: Internet
一 equipment 方面: injection hot property plastics rear, machine 筒未清洗 dry or nozzle has material 垫导致 injection 开始时排 gas 不畅. 二 injection molding parts mold 方面: （1）排 gas defect. （2） gate small or gate 位置不当. （3） type local retardant force large, make material combined relatively slow formed gas difficult. process 方面: （1） machine 筒, nozzle temperature degree high. （2） injection pressure or back pressure high. （3） injection speed degree fast or injection cycle long. raw materials 方面: （1） pellets 不均, has powder 末. （2） raw materials in material content high. （3） lubricant, demolding agent use amount more.
