Shanghai Daoqin Plastics Co., Ltd.

cold material main/primary is made parts gate belt/tape has color or color or from gate 出发 宛如若蚯蚓贴 in upper bending 疤痕, it 们由进入 type plastics front or separation holding pressure function rear type cold material formed, front material is or runner cooling function hot amount, in type front separation by cooling solid 化, through narrow gate expand 张注入 type 腔时, formed melt 破裂, also by rear hot material 推拥, is formed cold material 斑. solution methods: （1） cold material need good. also need gate upper 形式, large small and 位置, anti material cooling speed degree 悬殊. （2）射咀 in degree need good, and injection molding parts mold material upper combined dimensions need design good, anti material or formed has cold material by belt/tape type 腔. （3） injection molding parts mold gas degree good. gas dry make gate mixed property 斑纹. （4） improve/increase mold temperature. decrease slow injection speed degree, increase large injection pressure, decrease low holding pressure and injection time, decrease low holding pressure pressure. （5） drying good plastics. less use lubricant, anti powder material by 污染.