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injection molding product color unstable, this large factors is 杀手!
injection molding production in, has 时会出现几天变 one-time color, 甚至一天之 inner 出现几 types color 偏差 情况. formed color unstable factors also less, lower 面列出一 会导致 color unstable main/primary factors, production for improvement.
1. injection molding machine temperature degree unstable, high low, color 一定会 unstable, this is large effect/influence factors, need excellent 先检查.
2. production cycle unstable, 时开时停, back pressure large formed temperature, make color generate 变化.
3. mixed material has according to mixed material process requirements mixed combined color powder and raw materials, ratio mixed material time 不足, add material methods or 顺序不 for and other color powder non-uniform, this is need focus/key point 检查.
4.焗 material temperature degree high or 者太久. types raw materials and material has it material temperature degree and time scope/range, heavy ultra- 出 this scope/range, injection molding parts color generate 变化. if add material more less, temperature degree effect/influence relatively is obvious color 也会出现 unstable, ratio has light material color or is shallow color injection molding parts. therefore for temperature degree plastics, most good need material or use temperature material, good material again mixed color powder most 保险.
5. in material in, due to hot effect/influence, color powder local in, make color 越 越 deep, has relatively injection molding parts its 麻点也会出现 more 情况. this 时, need increase expand dispersion 油, let color powder viscous in raw materials upper.
6. raw materials wet degree large, formed color powder adhesion method expand dispersion.
7. color powder 配 不准确. 每一批 color powder formulation in 各元素 use amount has relatively large 偏差, make in use new 一批颜 material 时, color generate 偏差, this type of 事情时 has 发生.
8. water material use amount more less, this for shallow color injection molding parts effect/influence relatively large.
9. raw materials grade 不一致. 由於每 types raw materials color different, make same color powder injection molding parts color has different. has 时同一 supply 商, raw materials different, color has 偏差, therefore for color requirements high product, need control to material color is 否一致.
10. color powder quality 太差, heat resistant, or is use 错不适宜该 raw materials use color powder, make color unstable.
