Shanghai Daoqin Plastics Co., Ltd.

gas 体辅助 injection molding parts molding is 欧美近期 development 出 一 types injection molding parts process, it as process/workflow is toward mold cavity inner resin material injection, rear utilizing 精确 自动化 control system, high pressure pressure shrink nitrogen gas 导入熔 melt material material in, make parts internal 膨胀而造 formed in 空, gas retardant force most small direction toward products low pressure and high temperature 区域. gas in products in flow 时, it through 置换熔 melt material material 而掏空 thick 壁截面, this 置换出 material material products its separation. filling process formed rear, gas 体继续 provide holding pressure pressure, solution material material cooling process in shrinkage issues. gas 体辅助 injection molding parts molding advantages is what for/regarding gas 体辅助 injection molding parts molding 兴趣如此之 large 呢? its main/primary causes in this type of methods 出现时 许诺 types types advantages. molding 者希望以 low manufacturing cost production high quality product. in reduce quality front lower use injection molding parts machine and molding technology can shrink short production cycle. through use gas 体辅助 injection molding parts molding methods, products quality to improve/increase, but also reduce injection molding parts mold cost. use gas 体辅助 injection molding parts molding technology 时, it advantages and use is non 常显. 1, decrease/reduce product deformation: low injection pressure make internal stress reduce, make warpage deformation drop to most low; 2, decrease/reduce pressure: low injection pressure make clamping force reduce, can use small machine 台; 3, improve/increase product degree: low residual stress improve/increase dimensions and product stability property; 4, decrease/reduce plastics raw materials: formed product thick separation is in 空, decrease/reduce plastics most more can 达40％; 5, shrink short molding cycle: and products versus ratio molding cycle shrink short, to foaming molding semi; 6, improve/increase design 自由: gas 体辅助 injection molding parts molding make structure property and design degree improve/increase; 7, thick thin one-time molding: for 一 壁 thick large products through gas technology can one-time molding; 8, improve/increase injection molding parts mold lifespan: reduce mold cavity inner pressure, make injection molding parts mold loss consumption decrease/reduce, improve/increase as lifespan; 9, reduce injection molding parts mold cost: decrease/reduce 射入点, gas 道取代 hot runner from make injection molding parts mold cost reduce; 10, remove sink marks: sheet/plate and gas increase rigid degree, 不必考虑 shrink issues. stage/phase: according to generally injection molding parts molding process amount melt plastics injection 入模穴; stage/phase: in melt plastics 尚未充满 mold cavity front, will high pressure nitrogen gas 射入模穴 in 央; stage/phase: high pressure gas 体推动 products in 央尚未 cooling melt plastics, to 模穴末端, most rear mold cavity; stage/phase: plastics parts in separation maintain high pressure, pressure make plastics toward outer injection molding parts mold, to cooling lower; stage/phase: plastics products cooling type rear, troubleshooting products internal high pressure gas 体, rear mold opening products. gas 体辅助 injection molding parts molding system 由四 部 separation formed A． nitrogen gas separation B． nitrogen gas increase pressure separation C． nitrogen gas control separation D． nitrogen gas 注入部 separation ↓ ↓ ↓ ↓① nitrogen gas generate machine ① gas increase pressure machine ① 简 easy control 台 ① injection molding parts mold gas gas ② 购 bottle nitrogen gas ② electrical increase pressure machine ② 箱柜式 control 台 ② nitrogen gas 射咀进 gas gas 体辅助 injection molding parts molding 配置⑴ gas increase pressure machine + gas control this type of comparison 经济, (如一台120NL/Min gas increase pressure machine upper 一台手提式 control 台) use this type of 配置, as 方便, upper outer bottle nitrogen gas can increase pressure control gas 体 输出. its high pressure nitrogen gas amount relatively small, relatively difficult meet/satisfy consumption nitrogen gas amount large injection molding parts cycle very short product production. ⑵ electrical high pressure pressure shrink machine + gas control this type of 配置也 can use outer bottle nitrogen gas is gas 源（如 bottle nitrogen gas electrical high pressure pressure shrink machine, again upper 手提式 control 台）, usually electrical high pressure pressure shrink machine can provide relatively large high pressure nitrogen gas amount, can meanwhile to several control 台输出 gas amount, control more injection molding parts mold production. need more nitrogen gas bottle. ⑶ nitrogen gas generate machine + electrical high pressure pressure shrink machine + gas control this is types sleeve/set made nitrogen machine high pressure pressure shrink machine increase pressure rear upper gas control device 配置. this is relatively 理想 配置, has high pressure nitrogen gas device is control device nitrogen gas 源, another bottle nitrogen gas, but also high pressure nitrogen gas device can as is more gas control nitrogen gas 源, can meanwhile control more injection molding parts mold production. this type of investment cost relatively high. gas injection molding parts molding use gas gas 体辅助 injection molding parts molding use main/primary is nitrogen gas. nitrogen gas as is gas in content most gas 体, 取之不竭, use 之不尽. it color, 无味, transparent, belongs to inert property gas 体, 不维持生命. 不会发生 chemical reaction, nitrogen gas advantages is 无毒, flame resistant, cost low. high pure nitrogen gas as is property gas 体, used for oxygen gas or gas 场. nitrogen gas （N2） in gas in content is 78.084%（空 gas in various gas 体 容积组 separation is N2: 78.084%, O2: 20.9476%, gas: 0.9364%, CO2: 0.0314%, its it also has H2, CH4, N2O, O3, SO2, NO2 and other, content less ）, molecular weight is 28, 沸点: -195.8℃, cold 凝点: -210℃. pressure shrink gas due to 不洁净（ main/primary is oxygen gas ）, in high temperature, high pressure lower chemical reaction 而导致材 material degradation or 腐蚀, therefore suitable. using/adopting gas injection molding parts molding 状况当 parts design in lower or several 情况时,应考虑 using/adopting gas 体辅助 injection molding parts molding process:1, parts very large;2, appearance very important;3, parts has very more internal structure, can can 引起塌陷;4, parts must very 平, but also need relatively small residual stress;5, parts very complex, but also structure need;6, product amount can made 模方面 investment;7, need, thick can 避免;8, processing amount requirements most small; gas injection molding parts molding basic 守则1, plastics inner gas must has mold opening front by to large gas in or recycling ring use. 2, plastics cooling 时体积 shrinkage phenomenon, can gas 体 膨胀 补偿. 3, in formed process in, gas control system and injection molding parts machine must can can combined. 4, injection molding parts machine screw to most 末端, anti plastics to screw front 端 空隙 in. 5, has mono toward 射咀, can can will material tube/pipe material time rear, 以避免 gas 体回流. 6, in gas 体射入点, gas pressure large plastics pressure 时, gas 体才会射入 plastics in. 7, gas 体射入 rear, must anti 止由射入点溢出, can use 密封 （SEALING）壁免. 8, gas 体进入 plastics rear, most small retardant force direction front 进. 如: relatively thick 截面. 9, in plastics inner gas 体会由 high pressure toward low pressure 区. 10, plastics in cooling and formed 形时, its pressure is gas control, non injection molding parts machine. 11, in 一 连续 gas inner, gas pressure in and is 一样. （ and other pressure ）