Shanghai Daoqin Plastics Co., Ltd.

异 常 现 象 产 product 原 因 understanding 决 方 method cracks 1. injection molding parts mold cold adjustment injection molding parts mold temperature degree 2. cooling time long reduce cooling time 3. plastics parts 嵌 金 and shrink 不一样 for metal parts preheating 4. ejection 装衡平不斜倾置, ejection 截面积 small or distribution adjustment combined or 置装出顶理安排顶杆数 amount and its 位置 5. made as degree 不够, demolding difficult 模脱计设确 positive degree products surface has 波纹1. material material temperature degree low, degree large improve/increase material temperature 2. injection pressure decrease can, high temperature material less injection pressure, 反之则 add large injection pressure 3. injection molding parts mold temperature degree low or degree temperature tool high increase large injection pressure 4. injection speed degree slow improve/increase injection speed degree 5. gate small expand gate products property strong/high degree decline 1. material temperature high, plastics separation understanding drop made 控, temperature material low material material in material inner time 2. plastics and parts internal stress large, hot parts for ensure parts has thick degree plastics 3. plastics use more control material ratio 4. plastics water raw materials preheating drying demolding difficult 1.置装出顶 tool structure defect ejection design 2. mold cavity demolding degree positive design injection molding parts mold 3. mold cavity temperature degree combined 适 适当 control mold temperature 4. mold cavity has or material injection molding parts mold 5. molding cycle short or long 适周塑注 made 控当期 6.模芯无进 gas 孔 修改 injection molding parts mold products dimensions unstable 1. machine or electrical appliances system 不稳 修 positive electrical appliances or pressure system 2. molding cycle 不一样 期周 type formed made 控, make 一致 3. temperature degree. time. pressure 变化 基 made 控, 节调本一致 4. plastics pellets large small use plastics 5. recycling lower combined mixed material new and material ratio/proportion control mixed combined ratio/proportion, make uniform 6. add material control material add or made parts delamination 1. different plastics mixed types product mono use plastics 2.同一 plastics different grade mixed 杂 采塑 号牌同 use material 3.塑化 defect improve/increase molding temperature degree 4. mixed material Raw Materials, 出 杂质 熔接痕1. plastics temperature degree low improve/increase machine 筒. temperature tool and degree 2. gate more decrease/reduce 浇变改 or gate 位置 3. demolding agent amount using/adopting demolding agent. decrease/reduce use amount 4. injection speed degree slow improve/increase injection speed degree 5. injection molding parts mold temperature degree low improve/increase mold temperature 6. injection pressure small improve/increase injection pressure 7. injection molding parts mold gas defect increase injection molding parts mold gas injection 不满1. machine degree temperature and low improve/increase machine and nozzle temperature degree 2. injection molding parts mold temperature degree low improve/increase injection molding parts mold temperature degree 3. add material amount 不够 适当 increase lower material amount 4. made parts ultra- 注 large most machine type formed injection amount selection injection amount more large injection machine 5.太口浇 and small increase gate dimensions 6. injection pressure degree speed or low slow improve/increase injection pressure or improve/increase temperature degree, injection speed degree