Shanghai Daoqin Plastics Co., Ltd.

gas 体辅助 injection molding parts molding is from injection molding parts molding development 而. this process injection molding parts molding important 缺限: shrink 痕. due to plastics solid has insulation property, parts cooling speed degree non-uniform, shrink generate. gas 体辅助 injection shot molding as principle is through “欠 material injection method ” will resin mold cavity in, will gas 体注入熔化 resin. due to low pressure high temperature degree, gas can retardant force most small 路径进入铸 parts 各 部 separation. gas molding parts 时, it will thick separation resin liquid uniform toward parts other separation. resin filling rear, gas in injection molding parts mold inner formed holding pressure, molding product shrinkage. gas 体辅助 injection molding parts molding achieve methods main/primary has types. this types methods difference in gas 体注入 mold cavity different, types is from 喷口注入（见 upper 图）, types is 直接注入 resin tube/pipe or molding parts. this types methods important difference in 于, front requirements has gas tube/pipe 都以喷口 is 开始端. using/adopting rear 者, 即直接 will gas 体注入 injection molding parts mold inner 时, need can ensure gas front resin filling methods 恰当, gas tube/pipe design 不受输 gas 口位置 限 made. gas 体辅助 injection molding parts molding process advantages 　　 in design 者看, this type of molding process most significantly advantages in using/adopting 空心道 and inner make injection molding parts parts in more add solid meanwhile weight increase, also decrease/reduce. other advantages also 包括: rigid degree more high. design degree more large. decrease/reduce inner pressure and warpage 发生. decrease/reduce /消 remove shrink generate. injection molding parts parts combined can can property increase. using/adopting type has 利于充填. and type versus ratio, production cycle shrink short. gas 体辅助 injection molding parts molding process disadvantages: most large issues is many gas injection molding parts molding process and patent issues, must 取 许 can can use. most good method is and technology provide 者进行协商, 以确定 is has necessary use can 证. other disadvantages 包括: gas 体, gas control system and can can need can increase use. if use inner molding technology, injection molding parts mold cost increase. design injection molding parts mold need gas 体喷口 design and 位置. in application in 会经历一 strip/profile 学习曲线. material selection scope/range large more thermoplastic property material can application gas 体辅助 injection molding parts molding. polypropylene (PP), polyamide (PA) and PBT resin and other 晶体材 material is comparison 理想 材 material, is it tool has melting point, relatively low viscous degree, gas easy 穿透. need based on for product property can requirements, rigid property, strong/high degree, conditions lower performance, chemical resistant and other selection Raw Materials. design in 需考虑 issues design molding parts combined lower parameters in or above 时, production and design 者应该考虑 use gas 体辅助 injection shot molding: molding parts has many internal structure can can shrink 痕. molding parts surface must 平整, inner pressure relatively low. molding parts in upper must stability. molding parts complex has relatively high structure requirements. due to for property can requirements, can 避免 会 use to thick type 材. use process requirements injection molding parts parts design in gas 体输送导 tube/pipe. this tube/pipe will gas and resin toward easy generate shrink 痕 方, or in filling need outer force 推动 方, or generate above types 情况 方. molding parts features 设置应 most resin and gas filling, use can can less gas 孔, gas tube/pipe tube/pipe 径也尽 can can small. can for mold cavity filling 情况进行 analysis forecast filler flow 状态, as is parts design and process parameters function. gas 体辅助 injection shot molding process 范例: automotive parts 车门 手 车门 hard parts block outer rear outer housing/shell outer trim parts 油门踏 sheet/plate 臂 乘客扶手 玻璃刮 water device 臂 空 gas device outer housing/shell 格栅 保险杠饰 belt/tape furniture 桌子 病床 椅子（扶手, base/seat, 椅腿） 草坪 and use tool office equipment machine 嵌版 键盘 frame 送纸滚筒 printing machine /传 true machine 嵌版 计算 machine frame machine device printing machine 嵌版 娱乐设施 high 尔夫球杆杆身 篮 sheet/plate high 尔夫车顶 sheet/plate machine 动车保险杆 other use tool medical analysis device 罩 淋浴房基 base/seat electrical machine 柜 洗衣 machine 波轮 平 sheet/plate power tools 手 马桶 base/seat 自动售货 machine water cold machine sheet/plate 随 越 越 more product design 者, engineering technology 人员, tool and 模塑商开始熟悉 gas 体辅助 injection molding parts molding process, issues is how to property use this process. positive 如一贯 做 method, in new product development process in, 每一位 formed 员都应该 in development process in can can stage/phase add 进. this 样, 各方 意见 and experience can 够交汇, has large shrink short new product development cycle reduce cost.