Shanghai Daoqin Plastics Co., Ltd.

hot solid property plastics injection molding parts utilizing screw or 一柱塞 polymer add hot machine 筒（120～260F）以 reduce viscosity, rear 注入一 add hot mold in （300—450F）. material material mold, for its holding pressure. generate chemical crosslinked, make polymer hard. hard （即 solid 化 ） products hot can mold in ejection, it can again molding or again melt. injection molding parts molding equipment has belt/tape use combined mold liquid pressure clamping plant/unit and can material material injection plant/unit. more hot solid property plastics is in pellets or sheet/slice lower use, can heavy force material 斗送入 screw injection plant/unit. processing polyester overall plastics （BMC）时, it has 如面包团, using/adopting material active will material material pressure 入螺纹槽 in. using/adopting this type of process methods processing polymer is （依 its use amount large small 排列）; aldehyde plastics, polyester overall plastics, poly amine, ring oxygen resin, aldehyde plastics, ethylene ester polymer and 邻苯二甲 acid 二烯丙 ester （DAP）. more hot solid property plastics has a large amount of filling agent （达70％ weight 份）, reduce cost or improve/increase its low shrinkage property can, increase strong/high degree or property can. commonly used filling agent glass fiber, material fiber, 陶土, fiber and 炭黑. this filling material can can separation has abrasion loss property, generate high viscosity, it must is processing equipment 克服. process process thermoplastic property plastics and hot solid property plastics in add hot will reduce viscosity. however, hot solid property plastics viscosity time and temperature degree increase, this is is chemical crosslinked reaction. this function comprehensive is viscosity time and temperature degree 而呈U type 曲线. in most low viscosity 区域完 formed mold as this is hot solid property injection 模塑 目, is material material molding is mold 形状 需 pressure is most low. this has for polymer in fiber loss most low. injection process process utilizing screw make material material add hot machine 筒, machine 筒则以 water or ring machine 筒四周 夹 sleeve/set in. screw can types material different type type add design, add pressure shrink remove gas add hot material material obtain low viscosity. large more hot solid property material material in flow is versus good. make material material mold as is in screw and use liquid pressure screw high speed toward front, make by low viscosity material material pressure mold in. this type of fast speed flow requirements in 0．5秒 time 里填满 mold cavity, pressure to 193MPa. 一旦填满 film material material high speed flow generate more large hot accelerated chemical reaction. mold cavity by 填满, injection pressure will drop to holding pressure pressure 34.5—68.9MPa. this type of holding pressure pressure in material material upper 5—10秒, rear pressure, rear lower cycle stage/phase. this type of material material by maintain in hot mold in, 直至变 hard, rear clamping plant/unit, ejection products. products rigid ejection can is light degree solid and has soft/flexible, in rear 1 separation or 2 separation inner utilizing products internal hot amount formed most solid 化. hot solid property products production cycle is 10—120秒钟, this 取决于 products thick degree and Raw Materials type 别. is products quality and heavy property using/adopting many different and technology. has hot solid property polymer in add hot generate gas 体, in mold by separation rear has 一 放 gas as. in this steps in, mold micro micro 开启, let gas 体逸出, rear 迅即关闭, lower material material again 注人. pressure provide relatively high strong/high degree, relatively good dimensions control, 并改进 surface 状态（ appearance ）, this is is using/adopting belt/tape has shrink film and film mold to, injection process in mold can 开启1／8—l／2in, rear speed pressure 紧, mold that 样. glass fiber, filling material and polyester saturated and resin made formed overall plastics can in machine upper upper another equipment formed injection 模塑. will active 塞式供 material machine 连接于 machine upper, strong/high made material, rear can use types different methods as 业. types belt/tape has 传统 往复式 screw, screw will material material toward front 方, meanwhile mixing/compounding and add hot. this need screw has 一止 阀. anti material material 返流回 screw upper, is material material viscosity very low. another types methods is utilizing or active will material material pressure mold mold cavity in, 柱塞往往 used for glass fiber weight ultra- 22％ material material, is this for fiber loss relatively small, can to relatively high strong/high degree. most used for hot solid property plastics molding types process methods is compression molding method （compressionmoulding） and pressure method （transferMoulding） and it versus ratio, injection molding parts method （InjectionMoulding） excellent disadvantages lower: injection molding parts method ratio compression molding method excellent is: relatively fast molding cycle （2～3倍） process 自动化; products relatively less; relatively low 人工费; high production can force. injection molding parts method versus for/regarding compression molding method disadvantages is: relatively high equipment and mold investment; compression molding method can to relatively high products strong/high degree and relatively good surface light degree. pressure method advantages generally injection molding parts method and compression molding method between. 　 equipment selection hot solid property plastics injection molding parts use equipment important factors 包括: clamping plant/unit can force and injection molding parts can force; control system and machine temperature degree. combined pressure 以吨计 clamping plant/unit, its selection according to products and runner 确定投影 molding 面积. 需吨位 can 由1.5～5t／in2, this 取决于模塑 products complex degree and use Raw Materials. equipment large small in 30～3000t间, large more Common equipment in 100～600t between. sheet/plate thick degree and machine rigid property is important. make material can can less generate bending deformation, 导致溢 material remove difficult. machine injection can force, need according to mold most large injection pressure and mold cavity and runner system inner material material 体积进行 analysis. injection pressure polyester overall plastics 需 96.5MPa直 to specialty aldehyde plastics 需 207MPa. machine injection can force is 以理论体积 amount 标志（ screw or active injection 面积乘以 its 冲程）. generally lower, equipment can force equipment can production products 体积 85％确定. equipment polystyrene (PS) production can force 标志时, in made parts weight production can force must to it and hot solid property plastics density upper 差异. currently control system is machine control, can selection injection speed degree, clamping plant/unit negative 荷. process as 程序, 侧模芯至移入 mold in 运动, ejection plant/unit as cycle and machine and mold temperature degree control. 一 特定 mold and raw materials add material and methods is has value. is in process process in has a large amount of amount. machine temperature degree control is through 流经包覆 machine 筒之夹 sleeve/set hot water 进行. mold temperature degree control most is utilizing 插入式 add hot device 进行, can using/adopting or ring hot 油进行. high degree can mold temperature degree is uniform products most important. commonly used equipment selection 包括: overall plastics use material device, fast speed more mold system, is fast speed injection use liquid pressure 流体储 material 缸, mold sliding use 连接于 liquid pressure system upper 侧模芯, machine 械手式取 parts system and gas gas plant/unit （ remove molding cycle in generate material ）. due to polymer low viscosity, it separation upper formed thin film material, therefore, hot solid property plastics formed product 常常需修整 remove flash. products flash remove is through will products 进行滚 light or will it through equipment, in this equipment in, high speed plastics 粒敲掉 脆 flash 层. application injection method production hot solid property material main/primary market 包括: automotive industrial: machine parts, 头灯反射镜 and made use products. electrical industrial: device, housing/shell and 线圈架. use electrical appliances: 面包烘箱 sheet/plate, 煮咖啡 device base/seat, electrical machine 整流子, electrical machine outer housing/shell and waste machine outer housing/shell. its it: power tools housing/shell, tool outer housing/shell, gas amount and tool. USA aldehyde plastics injection production in year heavy large 进展, 约55％ 模塑酚 aldehyde plastics products is using/adopting injection method production 出. polyester overall plastics using/adopting injection method 者约占 its application 之35％. is high quality uniform products, currently need increase equipment control and machine as property. machine price clamping plant/unit can force 每吨计 is 500—1000美元, this 取决于 large small and equipment. 例如, injection can force 30in3 200t clamping plant/unit 售价约190000美元.