Shanghai Daoqin Plastics Co., Ltd.

传统 injection molding parts molding process can separation is control melt speed degree process and control melt pressure for plastics cooling shrinkage 进行补 material holding pressure process. process in melt speed degree is 一定, 随 充填 process 进行, melt in mold cavity inner flow retardant force increase, melt pressure easy increase high, in 充填结束时入口 pressure relatively high value. due to high pressure in type inner function, not only formed material 溢边, and other defect phenomenon, but also make plastics parts internal generate relatively large internal stress, plastics parts demolding rear easy warpage and deformation, make plastics parts 形状精 degree and dimensions degree difficult meet/satisfy relatively high requirements, in use process in easy cracking phenomenon. is reduce or plastics in process in relatively high type pressure generate internal stress, will plastics parts deformation made in relatively low scope/range inner, plastics parts 充填 需 most low pressure 进行充填, this can reduce type inner pressure. low pressure injection molding parts molding and injection molding parts molding main/primary in 于: injection molding parts molding stage/phase control is injection speed rate, low pressure injection molding parts molding stage/phase control is injection pressure. in low pressure injection process in, type 腔入口 pressure 恒定, injection speed rate is 变化, 开始以 very high speed degree injection, injection time long, injection speed rate reduce, this can large degree remove plastics parts internal stress, ensure plastics parts degree. high speed injection 时, melt high speed flow generate viscous property hot can improve/increase melt temperature degree, reduce melt viscosity, make melt in low pressure lower type formed is can can. due to low pressure injection is 以恒定 pressure is 基准进行 melt 充填, low pressure injection machine has its 独特 油 pressure system. is achieve low pressure high speed molding, for injection molding parts machine injection system as necessary 改进, currently outer already development more liquid pressure injection system, its main/primary function has: 1） in 同一油 pressure lower can more grade most high injection molding parts pressure; 2） can in low injection molding parts pressure lower high speed injection. due to low pressure injection molding parts molding basic principle and generally injection molding parts molding same, therefore types molding methods use injection molding parts mold structure full 一样. low pressure injection molding parts molding use low pressure 充填, 不出现 pressure value, can fine small type 芯 折断 or loss bad, has improve/increase injection molding parts mold use lifespan. 另一方面 due to low pressure injection molding parts molding for injection molding parts mold abrasion loss relatively small, for injection molding parts mold temperature degree control and gas and other requirements very high. can using/adopting zinc - aluminum alloy material manufacturing and easy injection molding parts 模, this not only can reduce production cost, but also can fast speed production small amount precision plastics parts, 以适应 currently market upper more product types, small amount production need.