Shanghai Daoqin Plastics Co., Ltd.

injection molding parts 转移 molding types by as injection molding parts molding （ITM） new process not only can make more molding thermoplastic property plastics small parts obtain very good property, also can to more good molding quality. this type of hot solid property plastics molding process new process is will “ use hot runner injection molding parts ” and “ pressure molding ”进行组 combined process. plastics processing research injection molding parts molding and injection molding parts mold technology introduction, in hot runner injection molding parts molding in, melt more temperature degree and pressure is 不一样, this 意味 每 腔室 tool has different viscosity, different filling amount and different cooling 状况, most will parts dimensions and property can same. in addition, injection molding parts injection molding parts mold 另一 局限 property is, usually for hot runner design is for specific injection molding parts mold or material material, for/regarding full different injection molding parts mold or material material 而言, this hot runner 就不一定 suitable. is 此, plastics processing research made types injection molding parts mold. in injection molding parts mold solid using/adopting electrical add hot, in hot semi has melt 转移室, use 储存 自 screw melt, 并借助于一 active 塞/ gas system melt to mold cavity 里; cold semi in pressure sheet/plate 一侧. utilizing solid in semi thermal insulation sheet/plate decrease/reduce cold, hot semi between hot 传导. injection molding parts mold mold opening combined 拢时, active 塞/ gas system for melt 转移室施 pressure, through short 门, will material material 直接推入 mold cavity. in this system 里, injection molding parts and holding pressure is 由静止不动 injection molding parts mold is through screw achieve. in holding pressure stage/phase rear, 转移室开始充填 lower cycle material material. in this process in, mold opening 线（ it and combined and 转移室 动 as versus dry ）一直 maintain combined 拢, to processing parts separation cooling is 止. 据说, this type of process tool has many benefits. injection molding parts mold melt 转移部 separation and separation 几何形状无关, therefore is different injection molding parts mold versus 应 改变; due to injection molding parts is 由腔室 运动距离 决定, therefore can reduce more injection molding parts mold 造价, meanwhile need again use hot runner temperature degree control device; is melt very short, but also melt is from 蓄集室 门进入 mold cavity, therefore need pressure ratio hot runner can provide pressure more low, melt full can uniform has mold cavity; function in melt upper force and force more small, has long glass fiber reinforced material or powder mixed material molding, make processing parts shrinkage rate and warpage deformation more small. currently, plastics processing research already use more 达12 mold cavity injection molding parts mold for long glass fiber reinforced polypropylene (PP) material injection molding parts molding experiment/testing, formed 功. 据说, very fast use ultra- 100 mold cavity injection molding parts mold 进一步 testing this type of process. combined multiple process currently, very more molding already using/adopting 诸如三明治 molding, injection pressure molding and gas or water molding process production ultra- thin parts or glass fiber reinforced inner surface light slip in parts. plastics processing research injection molding parts molding and injection molding parts mold technology 部门建议, if will upper various process combined 起, can to more high grade processing parts, can reduce cost, mono methods property. plastics processing research injection molding parts molding and injection molding parts mold technology evaluation 说, will 三明治 molding, injection pressure molding and gas or water molding versus combined, this type of combined process full is from in injection molding parts mold molding “皮-芯-皮” 三明治 structure 开始. 三明治 molding and injection pressure molding versus combined, processing parts tool has more uniform 芯-皮 distribution. in injection pressure molding process in, use relatively low injection or pressure, not only can make processing parts in material material toward degree relatively low, decrease/reduce shrinkage and deformation, but also also can reduce for mold cavity resistant pressure requirements. in addition, has add pressure this steps, can obtain relatively small thick or thick. plastics processing research injection molding parts molding and injection molding parts mold technology 部门认 is, utilizing “三明治 molding ＋ injection pressure molding ” process, can production using/adopting molding process 根本无 method achieve thin processing parts. using/adopting 传统 三明治 injection molding parts molding process, can achieve most thin thick is 1.5 mm, using/adopting 三明治/ pressure process rear, made as 出 工 parts thick is 1 mm. 当然, 传统 三明治 molding process use processing parts 里芯材 percentage add large. plastics processing research injection molding parts molding and injection molding parts mold technology also 进行 如 lower experiment/testing, through “三明治 molding + water molding ” 组 combined process, use long glass fiber (GF) PP and filler PP molding 扶手. according to experience, use water method make short glass fiber reinforced nylon 66 or long glass fiber (GF) PP this category of fiber reinforcement material formed 空心, processing parts inner surface quality very 差, but also 空心腔 dimensions 也会发生偏差. therefore, plastics processing research injection molding parts molding and injection molding parts mold technology 部门认 is, glass fiber (GF) filling resin flow features make water molding process very difficult or method achieve. therefore, using/adopting 30％ long glass fiber reinforced PP as is table/sheet 皮, filler PP as is 芯 进行三明治 experiment/testing. injection molding parts mold is 30 mm, long degree is 500 mm. through water, make filler material material formed 空心. this 样, outer material tool has rigid property, tough property and resistant force and strong/high degree, inner material tool has good retardant property can, inner surface very light slip. currently, this type of methods already by used for industrial production in. 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