Shanghai Daoqin Plastics Co., Ltd.

ABS resin is in polystyrene (PS) resin modified upper development terpolymer. its in A代 table/sheet propylene 睛, B代 table/sheet butadiene, S代 table/sheet styrene. ABS resin tool has types comprehensive property can, A can improve/increase oil resistant property, chemical resistant property, from tool has surface hardness; B make ABS呈现橡胶态 tough property, improve/increase impact tough property; S make ABS plastics 呈现出 relatively good flow property, make tool has thermoplastic property plastics molding processing good property can.

卧式 injection molding machine

ABS plastics in main/primary used for manufacturing device table/sheet, use electrical appliances, electrical machine, electrical machine and other outer housing/shell and electroplating use ABS plastics, make its metal gloss, used for metal. injection molding is ABS plastics main/primary molding methods, it molding main/primary 取决于六 large conditions.

ABS  plastics drying

    ABS  plastics wet property and for water separation property relatively large,  in processing front 进行充 separation drying and preheating, 不 mono can remove water formed made parts surface 烟花状泡 belt/tape, silver streaks,  but also also has plastics 塑化,  decrease/reduce made parts surface color and 云纹. ABS  raw materials need control water separation in 013 % below/following.

injection molding front drying conditions is:  dry 冬季节 in 75～80 ℃ below/following,  drying 2～3h , 夏季雨 water in 80～90 ℃ lower,  drying 4～8h , 如 made parts need to especially excellent gloss or made parts complex,  drying time more long, 达8～16h. micro amount water 汽 存 in made parts surface is by 忽略 一 issues.

injection temperature degree  

ABS  plastics temperature degree and melt viscosity has other type plastics. in process temperature degree rise high 时,  its melt upper reduce very small, 但一旦达 to temperature degree (适宜 processing temperature degree scope/range, 如220～250 ℃) ,  if 继续盲目 rise temperature, 必 will heat resistant property high ABS  thermal degradation make melt viscosity increase large,  injection molding more difficult,  made parts mechanical properties decline. therefore,ABS  injection temperature degree although ratio polystyrene (PS) and other plastics more need high, 但不 can rear that has relatively wide rise temperature scope/range.

temperature degree 变化越 large,  will belt/tape 熔接缝, gloss 不佳, flash, mold sticking, color and other defect.   

injection pressure  

ABS 熔 melt parts viscosity ratio polystyrene (PS) or modified polystyrene (PS) high,  therefore in injection using/adopting relatively high injection pressure. 当然并 non has ABS  made parts need use high pressure,  for small type, simple, thick degree large made parts can use relatively low injection pressure. made process in,  gate 封闭瞬间 type inner pressure large small 往往决定 made parts surface quality and silver streaks defect degree. pressure small,  plastics shrinkage large,  and type surface 脱离接触 machine large,  made parts surface 雾化. pressure large, plastics and type surface scratch function strong/high 烈, 容 easy formed mold sticking.

injection speed degree

ABS  material using/adopting in and other injection speed degree relatively good. injection speed degree fast 时,  plastics easy or separation analysis gas material,  from in made parts upper 出现熔接缝, gloss and gate plastics and other defect. in production thin and complex made parts 时,  also is need ensure has high injection speed degree, 否则 difficult 以充满.

mold temperature degree

ABS  molding temperature degree versus for relatively high,  mold temperature degree versus for relatively high. generally adjustment mold temperature is 75～85℃, 当 production tool has relatively large 投影面积 made parts 时, 定 mold temperature degree requirements 70～80 ℃, 动 mold temperature degree requirements 50～60 ℃. in injection relatively large, complex, thin made parts 时, 应考虑专门 for mold add hot. is shrink short production cycle,维持 mold temperature degree versus for stability,  in made parts rear,  can using/adopting cold water 浴, hot water or other machine type method 补偿原 in type inner cold solid type time.  

material amount control

  generally injection molding machine 注ABS  plastics 时,  its injection amount standards injection amount 75%. is improve/increase made parts quality and dimensions stability,  surface gloss, color uniform,  requirements injection amount is injection amount 50%