Shanghai Daoqin Plastics Co., Ltd.

        欠注 is material full mold type 腔而导致 made parts 不完整 phenomenon, usually in thin 壁区域 or gate 区域. for has internal important also effect/influence 美观 欠注 can use adjustment, need adjustment can can 导致披锋 出现.

        引起欠注 causes is more 方面, main/primary has below/following 情况:

        1. material amount or material 不足. degree adjustment to made parts 充填完整 is 止.

        2. material temperature degree low. material temperature low material viscosity relatively large, 充模时 retardant force large, improve/increase material temperature, can reinforcement material flow property.

        3. injection pressure or speed degree low. material in type inner process, 缺乏足够 推动 force toward flow. improve/increase injection pressure, make type inner material in cold hard front obtain separation pressure and material amount 补充.

        4. injection time 不足. need injection 完整一定 weight made parts need time, time 不足即 table/sheet injection amount 不足, increase injection time to made parts 充模完整即 can.

        5. holding pressure 不当. main/primary is pressure, holding pressure 切换点 adjustment large, lower relatively more material amount holding pressure pressure 进行补充, make made parts weight 不足而欠注, heavy new adjustment holding pressure 转换位置 to most 佳点, make made parts 完整.

        6. mold temperature low. made parts and thick thin relatively large 时, low mold temperature consumption more injection pressure, improve/increase mold temperature or heavy mold water 道.

        7. and mold gate combined defect. injection 时射嘴溢 material, loss separation material amount, heavy new adjustment mold, make its and 射嘴良 good combined.

        8. 射嘴孔受 loss or separation 堵塞. selection base/seat production 时, and mold long time 不断撞击, easy make injection 孔逐浙变 small, material 流通道变 small, material strip/profile ratio increase large, cold material 堵塞射嘴孔 or consumption more injection pressure. lower 射嘴修复 or 清理, heavy base/seat front 进终止位置, will force reduce combined value.

        9. ring abrasion loss. screw upper ring and force ring abrasion loss large, injection can has 效 截止, make front already amount good material generate 逆流, loss injection separation amount, made parts 不完整.

        验证 胶 ring abrasion loss methods: upper ring injection formed rear 即转换 is 手动操 as 模式, will injection pressure and speed degree adjustment in relatively low value, again 执行储 material formed. 此时观察手动执行射胶时, screw 位置指示尺 front retardant degree, is 检查 胶 ring process/workflow degree. retardant less, process/workflow degree large.

         for abrasion loss degree large ring, fast more 换处理, 否则勉 strong/high production, product quality can ensure.

        10. mold gas defect. in injection process in, mold cavity inner gas and from separation type or 顶针缝隙处排出令 most rear 进入 熔 material in mold cavity inner by pressure shrink high gas pressure retardant 挡, in material 流 末端处留 lower retardant can combined defect.

         in separation type for retardant gas 位置开设适 degree gas 通道. retardant gas in separation type 面, can utilizing has sleeve/set or 顶针改设 internal gas can, or is heavy new selection gate 位置, make gas expected 位置排出.

        11. made parts 肋位太 thin or deep. this is easy 储藏空 gas 死角, is 充模困 difficult 方, add thick 肋骨胶位 or increase 根部圆弧角, most methods is add gas measures.

        12. separation runner or gate 通道不均. due to mold manufacturing technology and design water 平 不断 improve/increase, for mono 头模胶 runner design large more is combined and meet/satisfy molding requirements. this 里 指 is more runner distribution, 往往各 gate in micro small 差异, 就会导致 injection to mold cavity material separation amount 不均, make has type 腔填满, has type still 然欠注.