Shanghai Daoqin Plastics Co., Ltd.

一, TPE injection molding parts process according to material features and material 情况, generally in molding front for material appearance and process property can testing. supply material 往往含 has different degree water separation, agent and its it easy low separation material, especially is tool has wet toward TPR含 water amount is ultra- processing 允许 限 degree. therefore, in processing front must drying 处理, 并测定含 water amount. in high temperature lower TPR water separation content requirements in 5％ below/following, 甚至2％～3％, therefore commonly used true drying in 75℃～90℃ drying 2 small 时. already drying material must 妥善密封保存, anti material from gas in again wet 而丧失 drying 效果, is using/adopting drying material can is injection molding parts machine provide drying hot material, for as 业, maintain 清洁, improve/increase quality, increase injection speed rate is has 利. drying material 斗 装 material amount generally injection molding parts machine small use material amount 2.5倍. 以SBC is TPE in color upper excellent large more its it TPR材 material. therefore, it need relatively a small amount of masterbatch material can to certain types color 效果, but also generate color ratio its it TPR more is pure 净. generally 说, masterbatch material viscosity ratio TPR viscosity low, this is is TPR melt flow index ratio masterbatch material high, this will has dispersion process, make color distribution more add uniform. for/regarding 以SBS is TPE, recommendation using/adopting polystyrene (PS) type color agent. 　　 for/regarding relatively hard SEBS is TPR, recommendation using/adopting polypropylene (PP) (PP)载 color agent. 　　 for/regarding relatively soft SEBS is TPR, can using/adopting low density polyethylene (PE) or ethylene-vinyl acetate (EVA) copolymer. for/regarding relatively soft product types, recommendation using/adopting PP载 color agent, is composite/compounding material hardness will to effect/influence. 　　 for/regarding certain overmolding injection molding parts application, use polyethylene (PE) (PE)载 color agent can can for and bonding force generate effect/influence. 　 new injection molding parts machine use front, or in production in need product, more raw materials, color or plastics in has separation understanding phenomenon 时, need for injection molding parts machine machine 筒进行清洗 or 拆洗. 　　　 清洗 machine generally using/adopting add hot machine 筒清洗 method. material generally use plastics raw materials （ or plastics recycling material ）. for/regarding TPR材 material, can use processing new material 置换出 渡清洗 material. 　　 in processing injection molding parts process in, temperature degree setting is 否准确 is products appearance and property can good bad key/critical. lower is 进行TPR processing injection molding parts temperature degree setting 一 建议. 　　进 material temperature degree setting versus low, 以避免进 material 口堵塞并 let belt/tape gas 逸出. use masterbatch material is improvement mixed combined 状态, will 渡区域 temperature degree setting in masterbatch material melting point above. injection molding parts nozzle most 近区域 temperature degree setting 接近于 需 melt temperature degree. therefore, testing, usually TPR product in 各 区域 temperature degree setting scope/range separation is: material is 160摄氏 degree to 210摄氏 degree, nozzle is 180摄氏 degree to 230摄氏 degree. 　　 injection molding parts mold temperature degree setting high and injection molding parts cold temperature degree, this will can water separation for injection molding parts mold 污染以致 products surface strip/profile 纹. relatively high injection molding parts mold temperature degree usually 会导致 relatively long ring cycle, it can welding and products appearance 效果, therefore, injection molding parts mold temperature degree scope/range design in 30 to 40 between. 　　 in products molding filling injection molding parts mold type process in, if products filling property can good, 就会发生 pressure reduce large, filling time long, filling and other and other 情况, from make products in quality issues. is improve/increase products in molding filling property can, improvement molding products quality, generally can from lower several 方面 考虑: 1）改换另一 series product; 2）改变 gate 位置; 3）改变 injection pressure; 4）改变 parts 几何形状. 　　 usually will injection pressure control separation formed is one-time injection pressure, injection pressure （ holding pressure ） or above injection pressure control. pressure 切换时 machine is 否适当, for/regarding anti inner pressure high, anti material or material and other is non important. products ratio 容取决于 holding pressure stage/phase gate 封闭时 熔 material pressure and temperature degree. if from holding pressure to products cooling stage/phase pressure and temperature degree 一致, that products ratio 容就不会发生改变. in 恒定 模塑 temperature degree lower, products dimensions most important parameters is holding pressure pressure, effect/influence products dimensions most important amount is holding pressure pressure and temperature degree. 例如: in 充模结束 rear, holding pressure pressure reduce, table/sheet formed thick degree 时, holding pressure pressure again upper rise, this can using/adopting low clamping force molding thick large products, remove and flash. 　　 holding pressure pressure and speed degree usually is plastics mold cavity most high pressure and speed degree 50％~65％, holding pressure pressure ratio injection pressure large low 0.6~0.8MPa. due to holding pressure pressure ratio injection pressure low, in can holding pressure time inner, negative low, solid use lifespan long, meanwhile electrical machine consumption electrical amount reduce. using/adopting adjustment good 一定 计 amount, make in injection 行程 终点附近, screw still has a small amount of melt （缓冲 amount ）, according to inner filling 情况进一步施 add injection pressure （二次 or injection pressure ）, less melt. this 样, can anti products or adjustment products shrinkage rate. cooling time main/primary 取决于 melt temperature degree, products thick and cooling efficiency. in addition, material material hardness is factors. and very soft product types comparison, relatively hard product types in injection molding parts mold inner will relatively fast solid. if from 两侧进行 cooling, that 么每0.100' thick cooling time usually will is large 约10 to 15秒. overmolding methods products will need relatively long cooling time, is it can through relatively small surface has cooling. 每0.100'壁 thick cooling time will is large 约15 to 25秒. 1 plastics molding 不完整 （1）进 material adjustment 不当, material or more material. （2） injection pressure low, injection time short, or screw 退回太早. （3） injection speed degree slow. （4） material temperature low. 2 溢 material （ flash ） （1） injection pressure high or injection speed degree fast. （2） add material amount large formed flash. （3） machine 筒, nozzle temperature degree high or injection molding parts mold temperature degree high make plastics degree decline, flow property increase large, in 流畅进模 情况 lower formed flash. 3 银纹, bubbles and gas 孔 （1） material temperature high, formed separation understanding. （2） injection pressure small, holding pressure time short, make material and type surface 不密贴. （3） injection speed degree fast, make melt plastics large function separation understanding, generate separation understanding gas; injection speed degree slow, can and 时充满 type formed products surface density generate 银纹. （4） material amount 不足, add material 缓冲垫 large, material temperature low or mold temperature low effect/influence material flow and molding pressure, generate bubbles. （5） screw 预塑时 back pressure low, speed high, make screw 退回太 fast, gas easy material 一起推 toward machine front 端. 4 烧焦 dark 纹 （1） machine 筒, nozzle temperature degree high. （2） injection pressure or back pressure high. （3） injection speed degree fast or injection cycle long. 二, TPE processing injection molding parts process drying according to material features and material 情况, generally in molding front for material appearance and process property can testing. supply material 往往含 has different degree water separation, agent and its it easy low separation material, especially is tool has wet toward TPE含 water amount is ultra- processing 允许 限 degree. therefore, in processing front must drying 处理, 并测定含 water amount. in high temperature lower TPE water separation content requirements in () below/following, 甚至()~(), therefore commonly used true drying in 75℃～90℃ drying 2 small 时. already drying material must 妥善密封保存, anti material from gas in again wet 而丧失 drying 效果, is using/adopting drying material can is injection molding parts machine provide drying hot material, for as 业, maintain 清洁, improve/increase quality, increase injection speed rate is has 利. drying material 斗 装 material amount generally injection molding parts machine small use material amount 2.5倍. Color Matching 以SBC is TPE in color upper excellent large more its it TPE材 material. therefore, it need relatively a small amount of masterbatch material can to certain types color 效果, but also generate color ratio its it TPE more is pure 净. generally 说, masterbatch material viscosity ratio TPE viscosity low, this is is TPE melt flow index ratio masterbatch material high, this will has dispersion process, make color distribution more add uniform. for/regarding 以SBS is TPE, recommendation using/adopting polystyrene (PS) type color agent. for/regarding relatively hard SEBS is TPE, recommendation using/adopting polypropylene (PP) (PP)载 color agent. for/regarding relatively soft SEBS is TPE, can using/adopting low density polyethylene (PE) or ethylene-vinyl acetate (EVA) copolymer. for/regarding relatively soft product types, recommendation using/adopting PP载 color agent, is composite/compounding material hardness will to effect/influence. for/regarding certain overmolding injection molding parts application, use polyethylene (PE) (PE)载 color agent can can for and bonding force generate effect/influence. waste material again utilizing for/regarding SEBS composite/compounding material, recycling material utilizing ratio/proportion can high 达80%. black material can nano relatively high ratio/proportion recycling material. color, shallow color or transparent composite/compounding material will relatively easy 显示出污染 or color 变. in time very long or recycling material ratio/proportion very high lower, color, color, color and green has machine material relatively has can can color. for/regarding SBS composite/compounding material, recycling material ratio/proportion 应维持 in 25% below/following. will recycling material powder machine in, through powder machine make its powder formed small pellets, can and new material mixed combined use. 但每次放入 powder machine in recycling material 不应太 more, 以免造 formed 沉积, machine. material new injection molding parts machine use front, or in production in need product, more raw materials, color or plastics in has separation understanding phenomenon 时, need for injection molding parts machine machine 筒进行清洗 or 拆洗. machine generally using/adopting add hot machine 筒清洗 method. material generally use plastics raw materials （ or plastics recycling material ）. for/regarding TPE材 material, can use processing new material 置换出 渡清洗 material. temperature degree in processing injection molding parts process in, temperature degree setting is 否准确 is products appearance and property can good bad key/critical. lower is use product processing injection molding parts temperature degree setting 一 建议. use TPE进行 processing 时, machine temperature degree 应该渐进 setting. material temperature degree setting versus low, 以避免进 material 口堵塞并 let belt/tape gas 逸出. use masterbatch material is improvement mixed combined 状态, will 渡区域 temperature degree setting in masterbatch material melting point above. injection molding parts nozzle most 近区域 temperature degree setting 接近于 需 melt temperature degree. injection molding parts mold temperature degree setting high and injection molding parts cold temperature degree, this will can water separation for injection molding parts mold 污染以致 products surface strip/profile 纹. relatively high injection molding parts mold temperature degree usually 会导致 relatively long ring cycle, it can welding and products appearance 效果. injection molding parts mold filling, holding pressure, cooling in products molding filling injection molding parts mold type process in, if products filling property can good, 就会发生 pressure reduce large, filling time long, filling and other and other 情况, from make products in quality issues. is improve/increase products in molding filling property can, improvement molding products quality, generally can from lower several 方面 考虑: 1）改换科悦另一 series product; 2）改变 gate 位置; 3）改变 injection pressure; 4）改变 parts 几何形状. usually will injection pressure control separation formed is one-time injection pressure, injection pressure （ holding pressure ） or above injection pressure control. pressure 切换时 machine is 否适当, for/regarding anti inner pressure high, anti material or material and other is non important. products ratio 容取决于 holding pressure stage/phase gate 封闭时 熔 material pressure and temperature degree. if from holding pressure to products cooling stage/phase pressure and temperature degree 一致, that products ratio 容就不会发生改变. in 恒定 模塑 temperature degree lower, products dimensions most important parameters is holding pressure pressure, effect/influence products dimensions most important amount is holding pressure pressure and temperature degree. 例如: in 充模结束 rear, holding pressure pressure reduce, table/sheet formed thick degree 时, holding pressure pressure again upper rise, this can using/adopting low clamping force molding thick large products, remove and flash. holding pressure pressure and speed degree usually is plastics mold cavity most high pressure and speed degree 50%~65%, holding pressure pressure ratio injection pressure large low 0.6~0.8MPa. due to holding pressure pressure ratio injection pressure low, in can holding pressure time inner, negative low, solid use lifespan long, meanwhile electrical machine consumption electrical amount reduce. using/adopting adjustment good 一定 计 amount, make in injection 行程 终点附近, screw still has a small amount of melt （缓冲 amount ）, according to inner filling 情况进一步施 add injection pressure （二次 or injection pressure ）, less melt. this 样, can anti products or adjustment products shrinkage rate. cooling time main/primary 取决于 melt temperature degree, products thick and cooling efficiency. in addition, material material hardness is factors. and very soft product types comparison, relatively hard product types in injection molding parts mold inner will relatively fast solid. for/regarding in and other hardness 科悦TPE材 material products, if from 两侧进行 cooling, that 么每0.100" thick cooling time will is large 约10 to 15秒. overmolding methods products will need relatively long cooling time, is it can through relatively small surface has cooling. 每0.100"壁 thick cooling time will is large 约15 to 25秒. injection molding parts process conditions effect/influence for products evaluation main/primary has 三 方面, is appearance quality, 包括完整 property, color, gloss and other; is dimensions and versus for 位置间 准确 property; is and applications versus mechanical properties, chemical property can, electrical property can and other. this quality requirements also according to products use combined different, requirements degree different. injection molding parts conditions adjustment is improve/increase products quality and output/production volume necessary 途径. due to injection molding parts cycle very short, if process conditions 掌握不 good, waste product 就会源源不绝. in adjustment most good one-time 改变一 conditions, more 观察几回, if pressure, temperature degree, time 统统一起调 话, very easy formed mixed 淆, issues 也不知道 is 何道理. adjustment measures, is more 方面. 例如: solution products 注不满 issues has more can can solution 途径, need selection solution issues 症结 一, main/primary solution/scheme, can true positive solution issues. in addition, also attention/notes solutions in 辨证关系. ratio 如: products 出现 凹陷, has need improve/increase material temperature, has need reduce material temperature; has need increase material amount, has need decrease/reduce material amount. need 承认逆 toward measures solution issues can property. lower several type 例子: 1 plastics molding 不完整 （1）进 material adjustment 不当, material or more material. （2） injection pressure low, injection time short, or screw 退回太早. （3） injection speed degree slow. （4） material temperature low. 2 溢 material （ flash ） （1） injection pressure high or injection speed degree fast. （2） add material amount large formed flash. （3） machine 筒, nozzle temperature degree high or injection molding parts mold temperature degree high make plastics degree decline, flow property increase large, in 流畅进模 情况 lower formed flash. 3 银纹, bubbles and gas 孔 （1） material temperature high, formed separation understanding. （2） injection pressure small, holding pressure time short, make material and type surface 不密贴. （3） injection speed degree fast, make melt plastics large function separation understanding, generate separation understanding gas; injection speed degree slow, can and 时充满 type formed products surface density generate 银纹. （4） material amount 不足, add material 缓冲垫 large, material temperature low or mold temperature low effect/influence material flow and molding pressure, generate bubbles. （5） screw 预塑时 back pressure low, speed high, make screw 退回太 fast, gas easy material 一起推 toward machine front 端. 4 烧焦 dark 纹 （1） machine 筒, nozzle temperature degree high. （2） injection pressure or back pressure high. （3） injection speed degree fast or injection cycle long. 三, TPE injection molding parts product surface issues and solutions TPE injection molding parts parts surface issues, generate this phenomenon main/primary causes is raw materials quality 太差, its and injection molding parts process parameters has 关. 1.1 whitening phenomenon: stabilizer and other combined agent 迁移至 molding product surface, its surface upper powder 一样呈现出一 types white phenomenon causes: main/primary is due to stabilizer amount combined or and polymer versus 容而引起. solutions: this category of type issues, selection and polymer versus property good stabilizer or will stabilizer use amount control in most scope/range. its 次, more formed versus for separation quality high stabilizer is separation has 效. another, has through 迁移至 molding product surface its function stabilizer. 例如, anti-static agent, lubricant and other. for this type of stabilizer 讲, selection make 迁移也 difficult 以出现 whitening stabilizer is non necessary. thermoplastic property elastomer in generally ring lower use very less 会出现 whitening issues, in high temperature, wet, outer long use combined, is improve/increase resistant property in combined upper add resistant heat stabilized agent （ anti agent ）, resistant stabilizer is separation necessary. especially is high temperature lower, its easy 引起迁移, therefore stabilizer selection is versus important. 1.2 发 viscous phenomenon: and resin versus ratio, soft thermoplastic property elastomer surface more easy generate viscous phenomenon. causes: main/primary is aging formed low versus for separation quality polymer and increase agent, stabilizer 迁移至 surface 而引起. 但无论 哪 types 情况, using/adopting outer light method （IR） and other analysis 手段, through analysis viscous formed separation can comparison easy 确定出 and related material 质. viscous main/primary is molding temperature degree high, polymer hot separation understanding formed low versus for separation quality material 质 缘故. tube/pipe molding machine setting temperature degree 本身未达 to hot separation understanding temperature degree, in molding process in 剪切生 hot has 时也会 make its 暂时达 to high temperature. solutions: as is its countermeasures, reduce molding temperature degree, low 剪切化, use nitrogen gas molding machine liquid pressure internal is separation has 效. another, in molding machine 暂停时, material long time melt 状态置留 in molding machine mold cavity inner, has 时也会因 hot aging viscous. another, in high temperature lower use products very easy 出现发 viscous phenomenon. therefore, stabilizer, soft agent types type selection and use amount is non important. 1.3 aging phenomenon: products mechanical properties obvious reduce, appearance quality causes: and machine material and metal material versus ratio, polymer/macromolecule material heat resistant, resistant outer property relatively 差引起 products aging. more products aging make its machine features obvious reduce, appearance quality 变差. solutions: through combined heat resistant, weather resistance and other stabilizer, in 一定程 degree upper can made aging phenomenon generate.