Shanghai Daoqin Plastics Co., Ltd.

　1, injection molding machine as principle
 

　　 injection molding machine as principle and use injection device versus 似, it is screw （ or 柱塞） 推 force, will already good melt 状态（即 viscous 流态） plastics injection combined good mold cavity inner, solid type rear products process process.
 

　　 injection molding is 一 循 ring process, cycle main/primary 包括: amount add material ——熔 melt 塑化——施 pressure injection ——充模 cooling ——启模取 parts. 取出塑 parts rear also again 闭模, lower 一 循 ring.
 

　　2, injection molding machine structure
 

　　 injection molding machine according to methods separation is 柱塞式 injection molding machine and screw injection molding machine, machine methods also can separation is liquid pressure 式, machine and liquid pressure —— machine 械（连杆）式, as methods separation is 自动, semi 自动, injection molding machine.
 

　　（1）卧式 injection molding machine: this is most Common type type. its clamping separation and injection separation 处于同一 water in upper, mold is water direction 打开. its features is: machine 身矮, easy as and repair; machine heavy low, relatively 平稳; products ejection rear can utilizing heavy force function 自动落 lower, easy achieve full 自动操 as. currently, market upper injection molding machine more using/adopting types type 式.
 

　　（2）立式 injection molding machine: its clamping separation and injection separation 处于同一垂直 in upper, mold is 沿垂直 direction 打开. therefore, its 占 面积 relatively small, easy 安放嵌 parts, mold relatively 方便, material 斗落入 material material can relatively uniform 进行塑化. products ejection rear easy 自动落 lower, must use lower, easy achieve 自动操 as. injection molding machine used for small type injection molding machine, generally is in 60克 below/following injection molding machine using/adopting relatively more, large, in type machine using/adopting.
 

　　（3）角式 injection molding machine: its injection direction and mold separation interface in 同一 面 upper, it especially combined processing in separation 不允许留 has gate 痕迹 平面 products. it 占 面积 ratio injection molding machine small, 但放入 mold inner parts easy 倾斜落 lower. this type of type injection molding machine used for small machine.
 

　　（4） more 模转盘式 injection molding machine: it is types more 工位操 as injection molding machine, its features is clamping plant/unit using/adopting 转盘式 structure, mold 围绕转轴转动. this type of type injection molding machine separation injection plant/unit can force, can shrink short production cycle, improve/increase machine production can force, especially combined cooling type time long or 因安放嵌 parts need relatively more time large amount products production. clamping system large, complex, clamping plant/unit clamping force relatively small, this type of injection molding machine in plastics shoe sole and other products production in application relatively more.
 

　　 generally injection molding machine injection plant/unit, clamping plant/unit, liquid pressure system and electrical control system and other separation.
 

　　 injection molding basic requirements is 塑化, injection and molding. is achieve and ensure molding products quality front 提, is meet/satisfy molding requirements, injection must ensure has pressure and speed degree. meanwhile, due to injection pressure very high, versus in mold cavity in generate very high pressure （ mold cavity inner pressure generally in 20～45MPa between ）, therefore must has large clamping force. can 见, injection plant/unit and clamping plant/unit is injection molding machine key/critical parts.
 

　　3. injection molding machine as
 

　　3.1 injection molding machine as 程序
 

　　 clamping →预塑→倒 shrink → nozzle front 进→ injection → holding pressure → nozzle rear 退→ cooling → mold opening → ejection →开门→取工 parts →关门→ clamping.
 

　　3.2 injection molding machine as project: injection molding machine as project control 键盘操 as, electrical appliances control as and liquid pressure system as 三 方面. separation 别进行 injection process as, add material as, injection pressure, injection speed degree, ejection selection, material 筒各段 temperature degree and electrical 流, electrical pressure 监控, injection pressure and back pressure pressure adjustment and other.
 

　　3.2.1 injection process as selection
 

　　 generally injection molding machine can 手动操 as, can semi and full 自动操 as.
 

　　手动操 as is in production cycle in, 每一 动 as is as 者拨动操 as 开关而 achieve. generally in machine 调模时才 selection.
 

　　 semi 自动操 as machine can 自动完 formed 一 工 as cycle as, 但每一 production cycle rear as must safety 门, lower parts, again upper safety 门, machine can lower cycle production.
 

　　 full 自动操 as injection molding machine in formed 一 工 as cycle as rear, can 自动进入 lower 一 工 as cycle. in positive 常 连续工 as process in must machine control and adjustment. must attention/notes, need full 自动工 as, 则（1） in need safety 门, full 自动操 as in 断; （2） need and add material; （3）若 selection electrical 眼感应, attention/notes need electrical 眼.
 

　　实际 upper, in full 自动操 as in usually is need in 途临时停 machine, to machine mold demolding agent and other.
 

　　 positive production 时, generally selection semi or full 自动操 as. as 开始时, according to production need selection as methods （手动, semi or full 自动）, versus 应拨动手动, semi or full 自动开关.
 

　　 semi and full 自动 工 as already 由线路本身确定 good, as 人员 需 in electrical upper more speed degree and pressure large small, time long short, 顶针 次数 and other and other, 不会因操 as 者调错键钮而 make as 程序出现 mixed 乱.
 

　　当一 cycle in 各 动 as adjustment 妥当之 front, selection 手动操 as, 确认每 动 as positive rear, again selection semi or full 自动操 as.
 

　　3.2.2预塑动 as selection
 

　　 according to add material front rear base/seat is rear 退, nozzle is 否离开 mold, injection molding machine generally has types selection.
 

　　（1） solid add material: front and rear nozzle 都始终贴进 mold, base/seat 也不移动.
 

　　（2） front add material: nozzle mold 进行预塑 add material, 预塑完毕, base/seat rear 退, nozzle mold. selection this type of methods is: 预塑时 utilizing mold injection 孔抵住 nozzle, 避免熔 material in back pressure relatively high from nozzle 流出, rear can nozzle and mold long time 接触而 generate hot amount 传递, effect/influence it 们各自 temperature degree versus for stability.
 

　　（3） rear add material: injection formed rear, base/seat rear 退, nozzle mold rear 预塑, 预塑完注 base/seat front 进. as suitable for processing molding temperature degree especially narrow plastics, due to nozzle and mold time short, hot amount 流失, 也避免 熔 material in nozzle inner solid.
 

　　 injection 结束, cooling device 计时完毕 rear, 预塑动 as 开始. screw will plastics melt material to screw front 面. due to screw front mono toward function, melt plastics in machine front 端, will screw toward rear 迫退. screw to 预定 位置时（此位置由行程开关确定, control screw rear 退 距离, achieve amount add material ）, 预塑停止, screw 停止转动. is shrink as, shrink screw micro amount toward rear 退, as can make poly in nozzle 处 熔 material pressure understanding remove, due to machine inner outer pressure balanced 而引起 “流涎” phenomenon. need shrink, 则应 倒 shrink 停止, 开关调 to 适当位置, let 预塑停止. by pressure upper 同一时刻, shrink 停止开关也 by pressure upper. screw shrink as rear to pressure upper 停止开关时, shrink 停止. 接 注 base/seat rear 退. base/seat rear pressure upper 停止开关时, base/seat rear 退. using/adopting solid add material methods, attention/notes adjustment good 行程开关 位置.
 

generally production more using/adopting solid add material methods 以节省注 base/seat 进退操 as time, add fast production cycle.