Shanghai Daoqin Plastics Co., Ltd.

         injection molding mold in production due to causes, generate 烧伤 情况. according to machine 械, mold or molding conditions and other different causes 引起 烧伤, solutions different.

        1.  machine causes, 例如, due to conditions formed material hot, make resin high temperature separation understanding, rear injection to products in, or due to material inner nozzle and screw 螺纹, 止回阀 and other 部位造 formed resin 滞流, separation understanding color rear belt/tape products, in products in belt/tape has color 烧伤痕. this 时, 应清理 nozzle, screw and material 筒.

        2.  mold causes, main/primary is is gas defect 致. this type of generally in solid 定 方, easy and types difference. this attention/notes add gas 槽反排 gas and other measures.

        3.  in molding conditions 方面, back pressure in 300MPa above 时, make material separation hot, formed 烧伤. screw speed high 时, generate hot, generally in 40～90r/min scope/range inner is good. in 没设排 gas or gas relatively small 时, injection speed degree high 会引起 hot gas 体烧伤.