Shanghai Daoqin Plastics Co., Ltd.

thermoplastic property plastics injection molding this type of methods is will plastics material melt, rear will its film 腔. melt plastics 一旦进入 mold in, cold mold cavity molding formed 一定形状.

形状往往就 is most rear waste product, plant/unit or as is most waste product use front again need its it processing. many fine 部, 诸如凸起部. 肋, 螺纹, can in injection 模塑一步操 as in molding 出.

injection machine has basic parts: used for melt and plastics mold injection plant/unit and clamping plant/unit. clamping plant/unit function in 于: 1 make mold in 接受住 injection pressure lower combined; 2 will products 取出.

injection plant/unit in plastics mold front will its melt, rear control pressure and speed degree will melt mold. currently using/adopting injection plant/unit has types design: screw 式预塑化 device or di grade plant/unit, and 往复式 screw. screw 式预塑化 device utilizing 预塑化 screw （第一 grade ） again will melt plastics 送人注 material 杆（第二 grade ）

screw 预塑化 device advantages is melt material quality 恒定, high pressure and high speed, and injection amount control （ utilizing active 塞冲程两端 machine 械止推 plant/unit ） this advantages positive is transparent, thin products and high production speed rate need its disadvantages non-uniform time （导致资 material degradation ） relatively high equipment use and repair use.

most commonly used 往复式 screw injection plant/unit 不需柱塞即 will plastics melt injection. will material in powder or plastics melt, through screw to screw front 端止逆间处, plastics 流体流经 screw front 端并堆积于 screw front 方. screw front melt plastics will screw toward injection plant/unit rear 部, screw 转动, melt material and toward rear 部 移动一直继续 to formed injection amount. lower equipment as cycle in, screw 末梢止逆问关闭, anti material material screw 返回. screw and material screw function has material 柱塞, will plastics pressure mold.

往复式 screw advantages decrease/reduce plastics time, screw and screw 梢. this advantages in processing hot property material and using/adopting belt/tape color raw materials or resin product types 变卦时, screw and machine need 清理时, is key/critical in

currently application clamping plant/unit design 包括: 肘杆式 clamping plant/unit, liquid pressure clamping plant/unit and liquid pressure machine clamping plant/unit. 肘杆式 clamping plant/unit its design in manufacturing cost low, suitable for small equipment. its features 包括闭锁 as high machine 械效益, inner 设锁模 decrease slow plant/unit, mold loss bad slow and fast speed clamping as.

clamping 油缸 横顶 sheet/plate toward front, make 连肘伸 long make pressure sheet/plate front 运动. clamping plant/unit 关闭时, machine 械利益 reduce, make pressure sheet/plate speed 移动. pressure sheet/plate to mold 关闭 位置时, 连肘由 high speed low machine 械利益转 is low speed high machine 械利益. low speed is mold key/critical, high machine 械利益 is formed large need.一旦连肋充 separation 伸展, liquid pressure again is 坚持吨位 必 must is clamping plant/unit, will liquid pressure add clamping versus 反 一面, is anti molding good products by loss bad, need slow mold. through 整 连肘 plant/unit and pressure sheet/plate plant/unit 沿拉杠 移动（移 to plant/unit separation 伸展开 front mold combined 处） adjustment clamping plant/unit 以适应于 different mold high degree. 肘杆式 clamping plant/unit advantages 包括: fast speed clamping as, reduce can consumption and relatively low equipment 本钱. disadvantages is relatively liquid pressure clamping mold complex, 连接销 and sleeve/set need repair. 不 肘杆 design development already can decrease/reduce clamping plant/unit repair, this development 包括无油衬 sleeve/set, large large decrease/reduce strong/high made property lubricated.

进展之一 is full electrical machine using/adopting currently already has precision filament machine technology and 先进 交流伺服 electrical machine versus combined, use 以代替 liquid pressure force machine 组. this electrical machine provide formed machine function need force, large large reduce production products can consumption.

liquid pressure clamping plant/unit widely used in 1501000t equipment in, large separation used for 250700t equipment in. increase pressure tube/pipe （ or outer 置油缸）迅 speed clamping, a large amount of as used for small upper is speed degree fast. liquid will from high liquid device heavy force 进入主 active rear 部. semi 模瓣接触 front, mold in low speed low pressure 维护状态, this type of anti outer material, material or upper cycle 未取出 products formed loss 伤. mold 关闭时, liquid 问关闭通 toward liquid device 入口. active rear 部发生吨 grade clamping force. this injection cycle rear, liquid 问开启, make clamping plant/unit 渐渐开启模瓣. short inner, clamping plant/unit accelerated to fast speed speed degree.

liquid pressure clamping plant/unit is equipment plant/unit and provide active property. due to in clamping in 任何部位都 can 发生吨 grade clamping force, therefore need through equipment control 位置调 to versus 应于两 semi versus 接触处就 can mold upper. liquid pressure machine clamping plant/unit comprehensive machine and liquid pressure function clamping plant/unit formed grade clamping force. liquid pressure machine design due to 受予充 liquid amount 限止, use as formed clamping plant/unit, from 1000t left right to more large. clamping plant/unit speed degree made 于预充 liquid control 流体流 amount. liquid pressure machine design 包括如 lower several mono 元: can pressure sheet/plate to semi 模瓣, 近乎互 versus 接触之处 use liquid pressure 油缸; 2 anti large clamping force formed rear machine sheet/plate; 3移动 mold most rear 一段距离至闭 combined 态并发生 clamping force use short liquid pressure 油缸.

machine control local machine full function. already to using/adopting more micro machine control system. is and new control plant/unit versus sleeve/set, machine liquid pressure local already has 改进. and control ratio/proportion 阀门以 and versus 应 放 large plant/unit increase active property and property, meanwhile shrink short machine function time. micro machine control system and ratio/proportion liquid pressure plant/unit provide 动态响应以完 formed true positive ring system. ring system adjustment machine 以补偿油 temperature, raw materials viscosity and machine amount 变化. high water control 也出现 in equipment upper. drying device, cooling plant/unit and mold temperature degree control plant/unit ）并令 full machine equipment 由CRT and LCD进行调定 and 监控. versus 接于主计算 machine upper various machine provide workshop and production degree, SPC machine or 主计算 machine provide 实时监控.

plastics processing in important factors 包括: temperature degree, degree, color material distribution and melt density. machine temperature degree 发生之传 thermally conductive amount and screw generate machine hot 二者都 has processing excellent melt. most Common is large more used for melt thermoplastic property plastics can amount, through screw obtain.

随 screw mixing/compounding in between 发生, property material outer table/sheet by melt 塑化. material material screw front 进时, heavy mixed combined and function, plastics by full melt.