Shanghai Daoqin Plastics Co., Ltd.

injection molding screw is long time in high temperature, high pressure, high machine force and high abrasion scratch ring lower 进行工 as. front several factors is process conditions 需, abrasion scratch formed loss consumption can 避免. generally screw 都进行 surface nitrogen 化处理, improve/increase surface hardness, improve/increase resistant abrasion loss can force. is if 忽略 引起 abrasion loss causes, method will abrasion loss amount reduce, 必然会 large large reduce screw as lifespan.  

    below/following 说明引起 screw abrasion loss causes and decrease low abrasion loss methods  

    1, types plastics, has 一 理想塑化 processing temperature degree scope/range, control material processing temperature degree, make 之接近 this temperature degree scope/range. plastics from material 斗进入 material 筒, 首先会 to add material 段, in add material 段必然会出现 dry property abrasion scratch, this plastics hot 不足, melt 不均时, very easy formed material inner and screw surface abrasion loss increase large. 同样, in pressure shrink and 均化段, if plastics melt 状态紊乱不均, 也会造 formed abrasion loss increase large.  

    2, speed 应调校 当. due to separation plastics add has strong/high agent, glass fiber, material or other filling material. this material for metal abrasion scratch force ratio melt plastics large more. in injection molding this plastics 时, if use high speed formed, in improve/increase for plastics force meanwhile, will strong/high versus generate more more by fiber, by fiber has 锋利末端, abrasion loss force large is increase. machine material in metal surface high speed slip 行时, its function small. therefore speed 不宜调 太 high.