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注塑加工模具造成表面缺点的原因!

来源:http://www.ok9868.com     发布时间:2020-09-18 15:00:03    点击:

  生产注塑产品,都需要使用到注塑加工模具,一般正常的情况下,通过这种注塑成型方法生产的塑料制品,表面都具有较好的光泽度以及颜色,但是有些时候也难免会出现一些缺点,除了塑料本身的材料问题、着色剂以及模具表面的光泽度之外,注塑加工还会有哪些原因会造成这样的影响呢?
  The production of injection molding products, all need to use injection molding mold. Under normal circumstances, the surface of plastic products produced by this injection molding method has good gloss and color, but sometimes it is inevitable to have some shortcomings. In addition to the material problems of the plastic itself, colorant and the glossiness of the mold surface, what will the injection molding process have What are the reasons for this?
  (1)模具光洁度差,型腔表面有锈迹等,模具排气不好。
  (1) The surface of the mould is rusty, and the die has poor air exhaust.
  (2)模具的浇注系统有问题,应加大冷料井,加大流道、抛光主流道、分流道和浇口。
  (2) If there is a problem in the gating system of the mould, the cooling well should be enlarged, the runner, polishing sprue, splitter and gate should be increased.
  (3)料温与模温偏低,必要时可用浇口局部加热办法。
  (3) The material temperature and mold temperature are low, if necessary, the gate local heating method can be used.
                                                  山东模具
  (4)注塑加工压力过低、速度过慢、注射时间不足、背压不足,造成密实性差而使表面暗色。
  (4) The injection molding pressure is too low, the speed is too slow, the injection time is insufficient, and the back pressure is insufficient, resulting in poor compactness and dark surface.
  (5)塑料要充分塑化,但要防止料的降解,受热要稳定,冷却要充分,特别是厚壁的。
  (5) Plastics should be fully plasticized, but the degradation of materials should be prevented. The heating should be stable and the cooling should be sufficient, especially for thick wall ones.
  (6)防止冷料进入制件,必要时改用自锁式弹簧或降低喷嘴温度。
  (6) To prevent cold material from entering the parts, use self-locking spring or reduce the nozzle temperature if necessary.
  (7)使用的回收料过多,塑料或着色剂质量差,混有水汽或其它杂质,使用的润滑剂质量差。
  (7) Too much recycled materials, poor quality of plastics or colorants, mixed with water vapor or other impurities, and poor quality of lubricants used.
  (8)锁模力要足够。
  (8) The clamping force should be enough.
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