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injection molding outer housing/shell parts color unstable 7点 causes analysis
现 in, plastics outer housing/shell application already 经广泛起, active in, 我们都 is very Common, ratio 如: electrical appliances housing/shell, also has 我们平 commonly used 洗脸盆, is belongs to plastics, is in plastics processing 时候, color unstable is Common issues.
1, 首先, need is injection molding machine temperature degree, color unstable, injection molding machine temperature degree high low is has 关联, therefore, in plastics outer housing/shell processing 时, need excellent 先检查.
2, has back pressure large, production cycle unstable, production cycle unstable, 时开时停, make color 发生变化.
3, mixed material has according to mixed material process mixed combined color powder and raw materials, ratio time 不足, add material methods or is add material 顺序不一致导致 color separation non-uniform, this is formed color unstable causes 之一, therefore, in processing plastics outer housing/shell is need focus/key point 检查.
4, due to raw materials wet degree large, viscosity also has expand dispersion, most rear 就会造 formed plastics processing color unstable.
5, water material use amount more less, this for shallow color injection molding parts effect/influence relatively large.
6, raw materials grade 不一致. due to 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.
7, color powder quality 太差, heat resistant, or is use 错不适宜该 raw materials use color powder, make color unstable.
