Shanghai Daoqin Plastics Co., Ltd.

当 injection molding parts molding structure upper difficult demolding plastics parts, automotive tube/pipe and gas tube/pipe and other complex 形状 空心 plastics parts 时, generally is will it separation formed semi molding, rear again combined 起, make plastics parts property relatively 差. this category of plastics parts application day 益广泛, will similar wax 铸造 熔芯 molding process injection molding parts molding, formed 谓 熔芯 injection molding parts molding methods. injection molding parts molding basic principle is: use low melting point alloy formed can type 芯, rear can type as is parts injection molding parts mold in injection molding parts molding, cooling rear has type made parts from mold cavity in 取出, again add hot will type 芯熔化. is shrink short type 芯熔出 time, decrease/reduce plastics parts deformation and shrinkage. generally using/adopting and 感应线圈 meanwhile add hot methods, add hot make can type from inner toward outer 熔化, add hot 熔化残存 in plastics parts inner surface alloy table/sheet 皮层. injection molding parts molding especially 适于形状 complex, in and machine processing composite/compounding material products, this type of molding methods and blow molding and gas injection molding parts molding versus ratio, although need increase can type injection molding parts mold and equipment and type equipment, can separation utilizing has injection molding parts machine, molding degree relatively large. injection molding parts molding in, made parts is 围绕芯 parts made formed. made formed rear parts by 格, this and 传统基础 industrial method similar, new 奇. is key/critical issues in parts material, 传统 材 material is can can use as is plastics processing in parts, is 不够坚 hard, difficult in molding process maintain its 形状, especially is can pressure and melt impact, more main/primary is degree 绝不适 combined plastics products requirements, therefore, key/critical is need to parts combined material. currently using/adopting Sn－Bi and Sn-Pb low melting point alloy. injection molding parts molding already development formed 一专门 injection molding parts molding separation 支, automotive industrial for polymer/macromolecule material demand, has made parts already achieve amount production 如, 网球拍手柄 is large amount production injection molding parts molding products; automotive machine full more formed gas tube/pipe already obtain application; its it new applications has: automotive water 泵, water 泵推进轮, hot water 泵, aerospace device and other.