Shanghai Daoqin Plastics Co., Ltd.

谓 “ cold / hot 模 injection molding processing ” technology, is types can in injection molding cycle inner, make mold cavity surface temperature degree achieve cold hot ring process. its features is: in injection front, add hot mold cavity, make its surface temperature degree to processing material 玻璃化转变 temperature degree （Tg） above; mold cavity rear, speed cooling mold, make made parts in demolding front full cooling.
　　 this type of cold / hot injection molding process can large degree improvement injection molding products appearance quality, but also can certain processing （如旨 in cover/cap surface defects and abrasion 砂处理） process, from reduce overall production cost. in certain lower, also can upper or powder coating process. in that for surface gloss degree has relatively high requirements application in, cold / hot injection molding process also use glass fiber reinforced material. process other advantages also 包括: reduce injection molding internal stress, decrease/reduce 甚至消 remove 喷射痕 and can weld lines, and reinforcement resin flow property, from production thin product and other.
　　 usually lower, cold / hot injection molding process suitable for has injection molding machine. is, if mold surface to fast speed add hot or cooling, also need combined use 特定 辅助 system, currently commonly used system is high temperature hot water system and high temperature system. this system in 蒸汽, need 么 自 external 锅炉, need its control equipment generate. in year front, SABIC innovation plastics 就开始 in Japan research cold / hot injection molding technology. currently, company in its 亚太区 development in in use is high temperature system, in 位于马萨诸塞州匹兹菲尔德 polymer processing development in 心（PPDC） in, company use Germany Single Temperiertechnik company high temperature hot water system, it can provide 200℃ high temperature hot water.
　　 is achieve has process control, mold must hot electrical 偶, and hot electrical most good by in mold cavity surface 位置, 以便监控 temperature degree. is ensure process stability property, injection molding mold, injection molding machine and cold / hot control device also must formed in 一起. SABIC innovation plastics in process production system in 配备 一台 control equipment, will elements has 效 集 formed in 一起.
　　 in process stage/phase, utilizing in inner ring or high temperature hot water add hot mold cavity surface, make its temperature degree to high by processing resin 玻璃化转变 temperature degree 10~30℃ water 平. mold cavity surface to this temperature degree value, system toward injection molding machine 发出信号, will plastics injection to mold cavity in. mold cavity by 填满（ injection stage/phase formed ） rear, cold water in mold in ring flow, fast speed belt/tape hot amount, from make injection molding parts in demolding front full cooling. utilizing 一 阀站, can achieve from or high temperature hot water to cold water 切换, 反之亦然. parts cooling rear, mold 打开, parts by ejection, rear heavy upper process.
　　 process optimization: mold design and 构造
　　 cold / hot injection molding technology ring cycle remove 取决于 processing material outer, mold design and for its has large effect/influence. generally, add hot mold time 取决于 mold use 钢 总 amount, therefore amount decrease/reduce need add hot and cooling amount non important. is to this 一点, most good is will mold cavity and 模芯嵌入 to sheet/plate in, is 穿 模 sheet/plate. is decrease small hot loss improve/increase efficiency, also in can can conditions lower, utilizing gas and thermal insulation material, will this parts and mold cavity and solid sheet/plate 隔开.
　　 remove can can decrease/reduce must cold / hot ring use amount outer, also 应考虑 use tool has high thermally conductive property metal, copper alloy or other tool has good thermally conductive property alloy made as mold. this metal has shrink short add hot / cooling mold cavity surface time. in addition, in mold cavity surface 附近布置 water tube/pipe can add fast speed degree. however, more 数情况 lower, products 几何形状不允许 this 样做. tube/pipe 如此, cooling methods 却极适 combined this type of process, this is is, its tube/pipe 线 布置 can and parts surface maintain 一致. therefore, cooling methods can large shrink short most important 位置（即 mold cavity surface ） hot time.
　　就共形 cooling technology 而言, it 往往涉 and to injection molding manufacturing, or more 确切 说 is block manufacturing. generally, through optimization cooling 道 设置, can optimization cooling efficiency, shrink short production cycle. 而传统 cooling methods very difficult to this 一点, is generally products 形状都 very complex, 且常规 cooling can by formed 直线形.
　　 currently, has multiple mold manufacturing technology can achieve cooling, light and metal method. is development used for process testing mold, SABIC innovation plastics PPDC selection USA 密歇根州特洛伊市 Fast4m Tooling company as is its mold supply 商. Fast4m Tooling using/adopting sheet/plate lamination technology, design manufacturing belt/tape has cooling mold cavity and 模芯组 parts.
　　 cold / hot injection molding technology advantages
　　 cold / hot injection molding technology can large improve/increase injection molding parts property. process has improvement semi and non resin products appearance, especially is for/regarding non resin is obvious. in injection stage/phase, mold surface temperature degree ultra- non resin 玻璃化转变 temperature degree 时, table/sheet material make to mold surface, 也不会出现传统 injection molding production in Common cold phenomenon, from ensure polymer in injection stage/phase can 够自由 flow. mold cavity 填满以 and mold cavity inner pressure increase large, resin by 迫流出, this has mold cavity surface 完美复 made, improve/increase products surface gloss degree.
　　 for/regarding filling type material, by 迫流出 resin in products outer surface upper formed polymer thin 层, it can will filler （ glass fiber, carbon fiber or material and other ）包覆起, from improve/increase products gloss degree reduce surface coarse degree. research table/sheet 明, this type of methods can make gloss degree improve/increase 50%~90% above. 总之, cold / hot injection molding process for/regarding improvement products surface coarse degree is non has 利, it can make glass fiber reinforced material products surface coarse degree to 70% improvement. make is filling material products, its surface coarse degree can obtain 20% above improvement.
　　 decrease/reduce can weld lines, and flow marks
　　 cold / hot injection molding technology has improvement weld lines deep degree and can degree. utilizing testing mold, SABIC innovation plastics separation using/adopting cold / hot injection molding technology and 传统 injection molding process separation processing 3 types different material. use injection molding technology production parts, its surface weld lines deep degree 介于6~13μm between, in using/adopting cold / hot injection molding process production parts upper, full to weld lines, therefore from amount its deep degree. this breakthrough property 改进意味 for certain product coating as can 省.
　　 decrease small internal stress
　　 internal stress usually is product warpage deformation main/primary causes 之一, in certain lower, it also has can can shrink short parts use lifespan. generally, using/adopting methods injection molding parts tool has relatively high internal stress, if application chlorine carbon （CCl4） this type of is 熟知 应 force cracking promote agent as solvent agent experiment/testing, 就会导致部 parts cracking. using/adopting cold / hot technology injection molding made parts due to tool has relatively low internal stress, therefore make using/adopting CCl4 solvent agent, 也不会导致部 parts cracking. 显然, using/adopting cold / hot technology injection molding parts in use front can 取消退火处理.
　　 cold / hot injection molding technology application is production automotive 车顶 行李支架, product by use substitute/replace metal made parts. SABIC innovation plastics using/adopting glass fiber reinforced Xenoy* 1760 resin （即11% glass fiber reinforced PC/PBT） production 该行李支架部 parts. using/adopting injection molding process 时, products surface obvious 喷射痕 and weld lines, 以至于无 method meet/satisfy surface quality requirements. meanwhile, glass fiber reinforced material also make products surface non coarse 糙, therefore need in upper front 进行打 abrasion. using/adopting cold / hot injection molding technology rear, upper various surface quality issues 都 以避免, from meet/satisfy high surface quality requirements.
　　总之, use PC, PC/ABS and PC/PBT and other material production electrical 视屏幕边 frame, light guide sheet/plate, automotive 音响组 parts and 笔记本 electrical outer housing/shell and other product 时, utilizing cold / hot injection molding process, can most large degree decrease/reduce effect/influence products appearance quality issues.