Shanghai Daoqin Plastics Co., Ltd.

1.熔 melt temperature degree

熔 melt temperature degree in injection molding process in non important. melt temperature degree can in injection molding machine nozzle amount or use for 空喷射 method coarse amount. material temperature degree setting 取决于 plastics melt melt temperature degree, screw speed, back pressure, injection amount and injection molding cycle. if as has processing certain 一特定 plastics experience, from relatively low temperature degree setting experiment/testing. is 便于精确 control melt temperature degree, material generally separation is more add hot 区, add hot can setting different temperature degree. if injection time long or in high temperature lower as, will 第一区 temperature degree setting is relatively low value, this will anti plastics melt and separation 流. injection molding front, ensure liquid pressure 油, add material 斗封闭 device, mold and material 缸都处于 positive setting temperature degree lower.

2. injection molding pressure

injection molding pressure is types make plastics melt flow pressure, can use in nozzle or liquid pressure equipment upper device amount. it has solid 定 数 value, melt mold difficult, injection molding pressure versus increase large.

injection molding pressure can separation is several stage/phase, in injection molding cycle stage/phase in, stage/phase pressure and stage/phase pressure can can need using/adopting high pressure, 以维持 relatively high injection molding speed degree. melt 充填完 mold rear can will pressure low. in injection molding semi crystallization property thermoplastic property plastics （如PA and POM）时, due to pressure 骤变, make products internal structure defect 变化, therefore has must use stage/phase pressure.

3.锁模 pressure

is for resistant injection molding pressure, mold in 锁模时必 must 维持一定 pressure, 但锁模 pressure large, equipment long in high pressure lower as, can can formed mold and equipment loss bad. 计算锁模 pressure need plastics products 投影面积, 据此计算一 适 combined pressure value. injection molding parts 投影面积, is from clamping force add direction to 面积. is injection molding parts high degree relatively large, that 么侧壁面积也必 must 考虑进.

4. back pressure

using/adopting high back pressure has color material and other filler dispersion uniform and plastics 熔化, meanwhile long screw time, for fiber reinforcement plastics in fiber formed loss 失. back pressure setting high, in 任何情况 lower can ultra- injection molding machine injection molding pressure 20%.

5. injection speed degree

injection molding thin products 时, must using/adopting high speed, 以便于 in gate melt solid full filling mold. injection speed degree high, can use 阶梯式 injection speed degree, generate melt or gas and other defect.