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ratio 克PPO polyphenylene oxide (PPO) injection molding fault/failure formed and countermeasures
Date: 2019-11-20 09:49
Views: 2254
Source: Internet
欠注
formed and countermeasures
1. process conditions control 不当. 应适当 adjustment.
2.熔 material temperature degree low. 应适当 improve/increase.
3.浇注 system structure dimensions small. 应适当放 large gate and runner 截面.
4. mold temperature degree low. improve/increase.
5. injection pressure low. 应适当 improve/increase.
6. injection speed degree fast. 应适当 decrease slow.
7. injection time short. 应适当延 long.
8. nozzle 堵塞. 应清理 nozzle.
9. molding products weight ultra- injection machine most large injection amount. can using/adopting add material method, in more 腔 情况吸 lower, 应堵塞一 mold cavity, can use combined specifications injection machine.
溢 material flash
formed and countermeasures
1. molding temperature degree high. 应适当 reduce material temperature degree.
2. clamping force 不足. 应适当 improve/increase.
bubbles and 空洞
formed and countermeasures
1. injection pressure low. 应适当 improve/increase, can 适当放 large gate, shrink short gate 平直部 separation.
2. mold inner gas and easy material defect. 应设置排 gas 孔, improvement mold gas property can.
3. products thick 差异悬殊. thin and thick 壁间应平 slip 渡.
4. molding temperature degree high. 应适当 reduce material temperature degree.
5. mold temperature degree low. 应适当 improve/increase.
shrink 瘪
formed and countermeasures
1. injection pressure low. 应适当 improve/increase.
2. molding temperature degree high. 应适当 reduce material temperature degree.
3. mold temperature degree control 不当. mold temperature degree high or low 时, 都会引起 products shrink 瘪, combined adjustment mold temperature degree.
熔接痕
formed and countermeasures
1.熔 material temperature degree low. 应适当 improve/increase.
2. injection speed degree slow. 应适当 add fast.
3. mold temperature degree low. 应适当 improve/increase.
silver streaks 纹
formed and countermeasures
1.熔 material temperature degree high. 应适当 reduce material temperature degree.
2. raw materials in water separation content high. for raw materials drying 处理.
3. raw materials in easy material content high. improve/increase mold gas property can, increase gas 孔.
4.熔 material in gate 部位摩 scratch generate silver streaks. 应适当反 large gate dimensions.
黑斑 and strip/profile 纹
formed and countermeasures
1.当 products surface 出现黑斑 and strip/profile 纹 形式总 is versus meanwhile, table/sheet injection equipment already by 污染. 应清洗 material and mold.
2.当 products surface 出现黑斑 and strip/profile 纹 形式不 versus meanwhile, table/sheet raw materials already by 污染. use pure raw materials.
gate 脱层
formed and countermeasures
1.熔 material temperature degree low. 应适当 improve/increase material temperature degree.
2. injection speed degree fast. 应适当 decrease slow.
3. gate 位置设置不 combined 理. 应改变 gate 位置.
4. mold temperature degree low. 应适当 improve/increase.
5. gate 截面积太 small. 应适当放 large.
烧焦
formed and countermeasures
1.熔 material temperature degree high. 应适当 reduce material and nozzle temperature degree.
2.熔 material adjustment flow 引起剪切 hot 导致烧焦. 应适当放 large gate dimensions, 并适当 decrease slow speed rate.
3. mold gas defect. 应设置 or increase gas 孔, improvement mold gas property can.
脱皮 delamination
formed and countermeasures
1. raw materials inner mixed 入杂质. remove material 杂质, material 筒.
2. mold temperature degree low. 应适当 improve/increase.
脉冲波动
formed and countermeasures
1.熔 material temperature degree low. 应适当 improve/increase.
2. gate 截面积太 small. 应适当放 large.
3. injection speed degree fast. 应适当 decrease slow.
