Shanghai Daoqin Plastics Co., Ltd.

is large can more easy use injection molding parts machine, understanding injection molding parts molding process.现 will injection molding parts machine as and molding methods and as methods introduction to large 家, specific fine separation need according to products molding conditions setting.希望 can for large 家 工 as has 帮助.　　1． injection molding parts machine as 程序: front 进→ injection → holding pressure →预塑→倒 shrink →射台松退→ cooling → mold opening → ejection →退针→开门→关门→ clamping →射台 front 进. 　　2． injection molding parts machine as project: injection molding parts 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 type selection, material 筒各段 temperature degree and electrical 流, electrical pressure 监控, injection pressure and back pressure pressure adjustment and other. 　　3． injection process as selection: generally injection molding parts 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 parts 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. upper, in full 自动操 as in usually is need in 途临时停 machine, to machine injection molding parts 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. 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. 　　4．预塑动 as selection: according to add material front rear base/seat is rear 退,即 nozzle is 否离开 injection molding parts mold, injection molding parts machine generally has types selection. （1） solid add material: front and rear nozzle 都始终贴进 injection molding parts mold, base/seat 也不移动. （2） front add material: nozzle injection molding parts mold 进行预塑 add material, 预塑完毕, base/seat rear 退, nozzle injection molding parts mold. selection this type of methods is: 预塑时 utilizing injection molding parts mold injection 孔抵助 nozzle, 避免熔 material in back pressure relatively high from nozzle 流出, rear can nozzle and injection molding parts 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 injection molding parts mold rear 预塑, 预塑完 again base/seat front 进. as suitable for processing molding temperature degree especially narrow plastics, due to nozzle and injection molding parts 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 并挤送 to screw front 面. due to screw front 端 止退 ring 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 as 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 “留涎” phenomenon. need shrink, 则应 倒 shrink 停止开关调 to 适当位置, let 预塑停止开关 by pressure upper 同一时刻, shrink 停止开关也 by pressure upper. screw as 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. 5． injection pressure selection: injection molding parts machine injection pressure pressure 阀进行 adjustment, in pressure lower, through high pressure and low pressure 油路 通断, control front rear injection pressure high low. in type above injection molding parts machine has types pressure selection, high pressure, low pressure and high pressure rear low pressure. high pressure injection is injection 油缸通入 high pressure pressure achieve. due to pressure high, plastics from 一开始就 in high pressure, high speed lower mold cavity. high pressure injection plastics 入模迅 speed, injection pressure table/sheet upper rise very fast. low pressure injection is injection 油缸通入 low pressure pressure achieve, injection process pressure table/sheet upper rise slow, plastics in low pressure, low speed lower mold cavity. high pressure rear low pressure is according to plastics types type and injection molding parts mold requirements from time upper control 通入油缸 pressure pressure high low achieve. is meet/satisfy different plastics requirements has different injection pressure, can using/adopting more different screw or methods, this meet/satisfy injection pressure, also separation machine production can force. in large type injection molding parts machine in tool has more injection pressure and more grade injection speed degree control function, this more can ensure products quality and degree. 　　6． injection speed degree selection: generally injection molding parts machine control sheet/plate upper has fast speed — slow speed use meet/satisfy injection speed degree requirements. in liquid pressure system in has large amount and small amount meanwhile 运行供油. 当油路接通 large amount 时, injection molding parts machine achieve fast speed clamping, fast speed injection and other, liquid pressure provide small amount 时, injection molding parts machine various as slow 进行. 　　7． ejection selection: injection molding parts machine ejection has machine ejection and liquid pressure ejection types, has also has gas ejection system, ejection 次数设 has mono and more types. ejection as can is 手动, can is 自动. ejection as is mold opening 停止限位开关 启动. as can according to need, through adjustment control upper ejection time 按钮 达 to. ejection speed degree and pressure can through control upper control, 顶针运动 front rear 距离由行程开关确定. 　　8． temperature degree control: temperature hot electrical is temperature parts, electrical temperature degree control sheet/plate formed is temperature plant/unit, control material and injection molding parts mold electrical hot electrical 流 通断, has selection solid material 筒各段 temperature degree and injection molding parts mold temperature degree. material electrical hot generally separation is 二段, or control. electrical appliances upper electrical table/sheet separation 别显示各段 electrical hot electrical large small. electrical table/sheet is comparison solid 定, if in in electrical table/sheet comparison long time low, can can electrical hot 圈发生 fault/failure, or 导线接触 defect, or electrical hot filament oxidation fine, or certain electrical hot 圈烧毁, this will make electrical 路并联 electrical retardant retardant value increase large make electrical decline. in electrical table/sheet has 一定读数时也 can simple use plastics strip/profile in electrical hot outer upper 抹划, material strip/profile melt and 否 判断 certain electrical hot is electrical or 烧毁. if machine add hot as, add hot fault/failure according to frequency rate can can in: solid electrical appliances (or 交流接触 device) loss bad electrical 流输入,感 temperature loss bad add hot 信号输出, add hot loss bad, temperature sheet/plate loss bad,主 machine sheet/plate loss bad.　9． clamping control: clamping is large machine force will injection molding parts mold combined 紧, 以抵挡 injection molding parts process melt plastics high pressure injection and filling injection molding parts mold injection molding parts mold 发生 巨 large force. safety 门, 各行程开关均 to 出信号, clamping as 立即开始. is sheet/plate slow speed 启动, front small short 距离以 rear, pressure slow speed control pressure block 脱离, active sheet/plate fast speed toward front 推进. in front 进至靠近 clamping 终点时, control 杆 另一端 pressure also pressure upper slow speed 开关, active sheet/plate also slow speed low pressure front 进. in low pressure clamping process in, if injection molding parts mold between has 任何障碍, can combined pressure upper high pressure 开关, high pressure is is machine from formed clamping as. this 段距离极 short, generally has 0.3~1.0mm, rigid high pressure 旋即就触 and clamping 终止限位开关, this as 停止, clamping process 结束. injection molding parts machine clamping structure has full liquid pressure and machine 械连杆式. tube/pipe is that types structure 形式, most rear is 由连杆完 full 伸直 实施 clamping force. 连杆 伸直 process is active sheet/plate and sheet/plate process, is 四根拉杆受 force by tensile process. clamping force large small, can from combined 紧模 瞬间油 pressure table/sheet rise most high value 知, clamping force large pressure table/sheet most high value high, 反之则 low. relatively small type injection molding parts machine is belt/tape clamping pressure table/sheet, this need according to 连杆 伸直情况 判断 injection molding parts mold is true combined 紧. if certain injection molding parts machine clamping 时连杆 very light 松 伸直, or “差一点点”未 can 伸直, or 几副连杆 in has 一副未完 full 伸直, injection molding parts 时就会出现胀模, made parts 就会出现 flash or its it 毛病. 　　10． mold opening control: melt plastics injection mold cavity inner and cooling formed rear,随 便 is mold opening as,取出 products. mold opening process separation stage/phase. stage/phase slow speed mold opening, anti made parts in mold cavity inner 撕裂. stage/phase fast speed mold opening, shrink short mold opening time. stage/phase slow speed mold opening, decrease low mold opening property formed impact and 振动.