Shanghai Daoqin Plastics Co., Ltd.

        二次 injection molding and injection molding, di injection molding and injection molding 一样, belongs to more material injection molding technology. more material injection molding basic is will 2 types or multiple different features material combined in 一起, from improve/increase product value. types 注入材 material is or 者基底材 material, types 注入材 material is cover/cap material.

        1, various injection molding technology

         in injection molding process in, cover/cap material 注入基材 upper 方, lower 方, or internal, combined formed is 一 完整 部 parts. this process can through more injection molding or injection molding formed. usually use cover/cap material is elastic property resin.

         more injection molding: if cover/cap material 构造允许 话, more injection molding is types very good medical devices processing methods. technology need has more machine 筒 特殊 injection molding machine, will different resin 注入一 injection molding mold. machine 筒应并排 or 呈L type 放置, or more 注入点 will resin mold.

         use 同一 注入点时, is 共塑, production composite/compounding parts is by outer 层包覆 core resin material. use more 注入点时, is injection molding, types material in types material upper molding, generate more structure.

        但 is more injection molding suitable for has product. injection molding 时, must slip block or will 模芯移至另一 mold cavity, also has methods is will 模芯送入另一台 injection molding machine.

        嵌入 injection molding: need production full cover/cap injection molding this category of product, need use injection molding. is to full cover/cap, 基材必 must from mold cavity in 移出, 放入另一 模芯 and mold cavity, 以便注入覆 cover/cap material.

         in process in, mold meanwhile in 同一台 or 另一台 different dimensions injection molding machine (取决于 injection molding parts large small) upper 运转. usually need ratio cover/cap material large more, and can can need preheating, make surface temperature degree 接近覆 cover/cap material melting point, from obtain most bonding strong/high degree.

        2, inner 组装

        二次 injection molding has by is inner 组装, is types material most rear full combined in 一起, not only is generate delamination structure, tube/pipe is mono parts or is parts material, can using/adopting technology. application is 何, ensure and cover/cap material to machine or chemical bonding strong/high degree is important.

        3, more material injection molding precautions

         generally 说, need strong/high bonding degree, cover/cap material resin temperature degree and same. if cover/cap material temperature degree low, method 熔化基材 surface, between bonding 则不够坚 solid. or temperature degree high, 基材就会 soft deformation, heavy 时, cover/cap material 会穿透基材, 导致部 parts processing 失败. therefore, selection 匹配 材 material can ensure good bonding.

         generally 而言, 匹配材 material tool has versus chemical features or has composite/compounding formed separation. and cover/cap material 不匹配时, usually can formed machine 械联锁 function, non chemical bonding.

         more material injection molding also attention/notes issues, most Common 包括: polymer between chemical or machine bonding strong/high degree 不够, mono or more parts material filling full, and mono or more material parts flash/burrs 闪蒸.

         injection molding machine maintain injection molding property. in addition, injection molding machine material 筒 射 amount and injection molding parts dimensions ratio value is effect/influence injection molding quality important factors. ratio value for/regarding has injection molding as separation key/critical, in injection molding in is important.

        止逆 plant/unit can water separation cover/cap material, injection molding material is metal 时止逆 plant/unit as relatively easy, is metal and relatively is has elastic property plastics, plant/unit as comparison difficult.