Shanghai Daoqin Plastics Co., Ltd.

injection pressure shrink molding （injection compression moulding/icm) is 传统 injection molding parts molding types high grade 形式. 　　 it can increase injection molding parts parts long degree /壁 thick ratio/proportion; using/adopting more small clamping force and injection pressure; decrease/reduce material internal stress; and improve/increase processing production rate. 　　 injection pressure shrink molding suitable for various thermoplastic property engineering plastics made as product, 如: large dimensions parts, thin 壁, micro type parts, optical sheet/slice, and has good resistant features requirements parts. 　　 injection pressure shrink molding main features and injection molding parts process versus comparison, injection pressure shrink molding significantly features is, its injection molding parts mold type 腔空间 can according to different requirements adjustment. 例如, it can in material 未注入 type front, make injection molding parts mold toward separation has 封闭, type 腔空间则 expand large to parts 完工壁 thick 两倍. another, also can according to different as methods, in material injection or in injection 完毕之 rear versus control type 腔空间 large small, make and injection process versus combined, let polymer maintain 适当 受 pressure 状态, to 补偿材 material shrinkage 效果. 　　 according to injection molding parts parts 几何形状, surface quality requirements, and different injection molding parts equipment conditions, has types injection shrinkage anti can selection. 　　 it is: 顺序式; 共动式; 呼吸式 and local add pressure. 　　　 　　顺序式icm（seq-icm)顺序式 injection pressure shrink molding process, its injection as and injection molding parts mold type 腔 推 combined is 顺序进行. 开始时, injection molding parts mold 导引部 separation has combined, has 一 约 is parts thick type 腔空间. resin injection molding parts mold type rear, 即推动 injection molding parts mold active separation 直至完 full combined, make polymer in type inner to pressure shrink. in process in, due to from formed to pressure shrink has polymer flow and 静止 瞬间, its can can in parts surface formed 一 流线痕迹, its can degree 取决于 polymer material color, and parts molding 时 纹理 structure and material types type. 　　该 types methods as process. can using/adopting 曲柄杆式 equipment this type of icm. 　　共动式icm（sim-icm)　　 and 顺序式icm same, 共动式icm开始, injection molding parts mold 导引部 separation is has combined, different is in material 开始注入 type meanwhile, injection molding parts mold 即开始推 combined pressure. material screw and injection molding parts mold type in 共同运动期间, can can has s2 or s2 延迟. due to polymer flow front 方一直 maintain stability flow 状态, it 不会出现如seq-icm process and surface 流线痕迹. 　　 due to upper types methods in as 开始时留 has relatively large type 腔空间, in melt polymer type 腔尚未遇 to direction pressure 之时, it can can is heavy force function 而首先流入 type relatively low 一侧, can can 因暂时处于未承受 pressure 状态而出现不希望 has foam. but also, parts thick large, type 腔空间也会越 large, 而流注 long degree long increase injection molding parts mold full combined time cycle, this can can make upper phenomenon add 剧. 　　呼吸式icm（breath-icm)　　 using/adopting 呼吸式icm, injection molding parts mold in injection 开始时即处于完 full combined 状态. therefore, polymer 一经注入即会 maintain in pressure 状态. this 就克服 front types methods can can 出现 潜 in issues. in polymer toward type 腔注入时, injection molding parts mold 也逐渐拉开并形 formed relatively large type 腔空间, type inner polymer 即始终 maintain in pressure lower. 而当材 material 接近满 type 腔时, injection molding parts mold already 开始反 toward combined, 直至完 full combined, make polymer 进一步 pressure shrink to parts demand thick degree. upper injection molding parts mold expand type 腔间 运动, can *助于射入 type inner polymer injection pressure or injection molding parts machine 运动程序 achieve. local add pressure 式icm（select-/com-icm) 　　 using/adopting local add pressure or pressure 式icm时, injection molding parts mold will full 处于闭 combined 状态. has inner 置 行 pressure in polymer injection or injection rear, from type certain local pressure toward type 腔, make parts relatively large 实体部位 local pressure by pressure thin. 　　 this type of local add pressure, can through injection molding parts equipment or mono liquid pressure plant/unit inner 置行头程序 进行 control. 　　 injection molding parts parts and injection molding parts mold design 　　 injection pressure shrink molding injection molding parts has outer type parts, 如手提 electrical outer housing/shell, small automotive 尾门, automotive table/sheet sheet/plate, and relatively is automotive sheet/plate and other. need selection good by parts and 流住通道位置, make to filling type 腔 良 good 效果. 一 商 use injection molding parts filling can use 探测推挤 force and injection pressure. is plastics made 定 一 standards 规则也 can utilizing, add strong/high 肋/壁 thick thick degree ratio/proportion, and 一 组 combined technology and other. 　　 need attention/notes make injection molding parts mold 伸出 导 toward and toward 芯部以 and type 腔. has 严密 公差配 combined, anti polymer 渗漏溢出 type 腔. need has belt/tape 逆止开关 nozzle, use anti polymer 回流入 injection molding parts machine. can in injection molding parts mold upper 安装一 belt/tape 逆止阀 hot 注喷头代替 upper nozzle. 　　 for/regarding has parts, make solid in injection molding parts mold 一侧 锁钉穿入另一侧 injection molding parts mold has good sliding combined, anti injection molding parts mold type 腔运动迫 make 销子松动 or by 卡*. another, due to in icm injection molding parts process in, type pressure ratio injection molding parts need low, therefore injection molding parts mold structure 不必像传统 injection molding parts that 样坚实笨 heavy. 　　 injection molding parts equipment 　　 due to icm force and material screw and injection molding parts versus as has different, therefore must to injection molding parts machine increase soft parts function. is obtain 如sim-icm and breath-icm injection molding parts mold and screw meanwhile 运动, liquid pressure injection molding parts machine liquid amount must improve/increase. another, in using/adopting liquid pressure injection molding parts equipment used for seq-icm时, can utilizing injection molding parts used for liquid pressure 阀, achieve injection molding parts mold 推挤运动. 　　 large more liquid pressure injection molding parts equipment can used for large type parts injection pressure shrink molding. for/regarding type 腔 闭 combined 运动应当 use 预先编 good pressure control, will to 一 麻烦. 　　 need attention/notes maintain injection molding parts mold type 腔 运动 is property, is non property injection molding parts mold 运动会出现 polymer flow 暂时效应, from 而导致 parts surface gloss 出现异样 outer 貌. 　　 due to icm can has ratio injection molding parts more long long degree and more low force and injection pressure, it can use ratio injection molding parts more small equipment production large type parts. 　　 for noryl gtx964进行 experiment/testing table/sheet 明, in has same thick and parts outer conditions lower, icm need ratio using/adopting injection molding parts decrease/reduce separation 之七十五 clamping force, and reduce separation 之三十 injection pressure. for using/adopting sim-icm made as 车体嵌 sheet/plate experiment/testing table/sheet 明, injection molding parts mold using/adopting in 央浇注道 and parts thick is 1.5mm时, its long degree can ratio injection molding parts growth separation 之二百. 　　 another, clamping force decrease/reduce in very large degree upper also 取决于 injection molding parts mold in 何时闭 combined, fast or 者 于迟缓都会 increase injection pressure and clamping force. 结语 　　 injection pressure shrink molding already formed application more year, its as versus comparison relatively easy. need has combined design specification, and using/adopting 恰当 材 material and process, it full can can suitable has injection molding parts equipment add upper for soft parts certain adjustment achieve as. 　　icm and injection molding parts versus ratio, its advantages in has relatively large long degree thick ratio/proportion; clamping force and injection pressure can decrease/reduce, in more small injection molding parts equipment upper made as large type parts; it also has relatively low material internal stress, in light upper obtain good 效果, therefore made as optical product, 如cds,dvss and use sheet/slice and other.