Shanghai Daoqin Plastics Co., Ltd.

         injection molding temperature degree for plastics melt flow, solid type, production efficiency and parts and dimensions degree has large effect/influence.

        每 types plastics injection molding has combined mold temperature degree 区域, make melt flow property good easy type 腔, parts demolding rear shrinkage and warpage deformation small, dimensions stability, force property can and surface quality high. is control mold temperature degree, must design temperature degree adjustment system, generally using/adopting mold cooling or add hot methods, necessary types has, machine outer housing/shell mold in use cooling plant/unit relatively more.

        1.  temperature degree adjustment necessary property

         mold temperature degree for parts molding quality, molding efficiency has relatively large effect/influence. in temperature degree relatively high mold 里, melt material flow property relatively good, has 利于胶 material type 腔, high quality parts appearance surface, make material solid time long, ejection easy deformation;

         for crystallization property material 而言, more has crystallization process 进行, 避免存放 and use in parts dimensions 发生变化; in temperature degree relatively low mold 里, melt material difficult 于充满 type 腔, internal stress increase, surface gloss, generate 银纹, 熔接痕 and other defect.

         different material tool has different processing process property, and various parts surface requirements and structure different, is in most has time inner production combined quality requirements parts, this requirements mold maintain temperature degree, mold temperature stability, production 出 胶 parts in dimensions 形状, parts appearance quality and other requirements 就越一致.

         therefore, remove mold manufacturing factors outer, mold temperature is control parts quality high low important factors, mold design 时应充 separation mold temperature degree control methods.

        2.  mold temperature degree control 原则

         is ensure in most has time inner production high appearance quality requirements, dimensions stability, deformation small parts, design 时应清楚 understanding mold temperature degree control basic 原则.

        ① different material requirements different mold temperature degree.

        ② different surface quality, different structure mold requirements different mold temperature degree, this requirements in design temperature system tool has for property.

        ③ front temperature degree high rear temperature degree, generally lower temperature degree is 2~3º left right.

        ④ has 火花纹 requirements front mold temperature degree ratio generally light requirements front mold temperature degree high, currently must hot water or hot 油时, generally temperature degree is 40º left right.

        ⑤ 当实际 mold temperature degree can to requirements mold temperature 时, for mold rise temperature, therefore mold design 时, separation 考虑胶 material belt/tape mold hot amount can meet/satisfy mold temperature requirements.

        ⑥ 由胶 material belt/tape mold hot amount remove through hot 辐射, hot methods consumption outer, large separation hot amount 需由循 ring hot belt/tape outer.

        ⑦ mold temperature 应均衡, can has local hot, cold.