Shanghai Daoqin Plastics Co., Ltd.

injection molding processing machine tool has can one-time molding outer type complex, dimensions or belt/tape has metal parts 质 密致 plastics products, by widely used in national defense, machine electrical, automotive, 交通运输, building materials, packaging, 农业, 文教卫生 and day active field/area. injection molding processing molding process for various plastics processing tool has good property, production can force relatively high, easy achieve 自动化. in plastics industrial speed development 今天, injection molding processing machine in amount upper or product types upper has important 位, from formed is currently plastics machine in growth most fast, production amount most more machine types 之一. 　　我国 plastics processing injection molding processing processing 厂星罗 its 布, full 国各, equipment technology water 平参差不齐, large more processing injection molding processing processing equipment need technology renovation. this year, 我国塑 machine industry technology 进步十 separation significantly, especially is injection molding processing machine technology water and outer product large large shrink small, in control water 平, product internal quality and appearance type and other 方面均取 significantly 改观. selection Domestic equipment, relatively small 投入, 同样也 can production and Imported equipment quality versus product. this is injection molding processing processing technology renovation conditions. 　 need has good products, must need has good equipment. equipment abrasion loss and is types 自然规律, 人们掌握 this type of 规律, can anti or decrease/reduce equipment abrasion loss and 腐蚀, long equipment use cycle, ensure equipment good rate. 　　 is add strong/high plastics machine use, and tube/pipe as, has 关部门 already made has standards and fine 则, requirements equipment tube/pipe 理部门 and production injection molding processing processing for equipment tube/pipe and use to “科学 tube/pipe 理, positive use, combined lubricated, 精心维护, maintenance, plan 检修, improve/increase equipment good rate, make equipment 经常处于良 good 状态. 　 plastics injection molding processing molding technology is according to pressure principle from 十九世纪末二十世纪初 development 起, is currently plastics processing in most using/adopting methods 之一. method suitable for full thermoplastic property plastics and separation hot solid property plastics （约占 plastics amount 1/3）. 1.1 injection molding processing molding machine as principle 　 injection molding processing 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 processing 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. 1.2 injection molding processing machine structure 　　 injection molding processing machine according to methods separation is 柱塞式 injection molding processing machine and screw injection molding processing 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 processing machine. 　　（1）卧式 injection molding processing machine: this is most Common type type. its clamping separation and injection separation 处于同一 water in upper, injection molding processing 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 processing machine more using/adopting types type 式. 　　（2）立式 injection molding processing machine: its clamping separation and injection separation 处于同一垂直 in upper, injection molding processing mold is 沿垂直 direction 打开. therefore, its 占 面积 relatively small, easy 安放嵌 parts, injection molding processing 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 processing machine used for small type injection molding processing machine, generally is in 60克 below/following injection molding processing machine using/adopting relatively more, large, in type machine using/adopting. 　　（3）角式 injection molding processing machine: its injection direction and injection molding processing 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 processing machine small, 但放入 injection molding processing mold inner parts easy 倾斜落 lower. this type of type injection molding processing machine used for small machine. 　　（4） more 模转盘式 injection molding processing machine: it is types more 工位操 as injection molding processing machine, its features is clamping plant/unit using/adopting 转盘式 structure, injection molding processing mold 围绕转轴转动. this type of type injection molding processing 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 processing machine in plastics shoe sole and other products production in application relatively more. 　　 generally injection molding processing machine injection plant/unit, clamping plant/unit, liquid pressure system and electrical control system and other separation. 　　 injection molding processing 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, table/sheet 1）, therefore must has large clamping force. can 见, injection plant/unit and clamping plant/unit is injection molding processing machine key/critical parts. 1.4 injection molding processing machine as 1.4.1 injection molding processing machine as 程序 　　 nozzle front 进→ injection → holding pressure →预塑→倒 shrink → nozzle rear 退→ cooling → mold opening → ejection →退针→开门→关门→ clamping → nozzle front 进. 1.4.2 injection molding processing machine as project 　　 injection molding processing 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. 1.4.2.1 injection process as selection: 　　 generally injection molding processing 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 processing 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 injection molding processing 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. 1.4.2.2预塑动 as selection 　　 according to add material front rear base/seat is rear 退, nozzle is 否离开 injection molding processing mold, injection molding processing machine generally has types selection. （1） solid add material: front and rear nozzle 都始终贴进 injection molding processing mold, base/seat 也不移动. （2） front add material: nozzle injection molding processing mold 进行预塑 add material, 预塑完毕, base/seat rear 退, nozzle injection molding processing mold. selection this type of methods is: 预塑时 utilizing injection molding processing 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 processing 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 processing 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 processing 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. 1.4.2.3 injection pressure selection 　　 injection molding processing 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. 　　普通 in type above injection molding processing 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 processing 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 processing machine in tool has more injection pressure and more grade injection speed degree control function, this more can ensure products quality and degree. 1.4.2.4 injection speed degree selection 　　 generally injection molding processing 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 processing machine achieve fast speed clamping, fast speed injection and other, liquid pressure provide small amount 时, injection molding processing machine various as slow 进行. 1.4.2.5 ejection selection 　　 injection molding processing 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. 1.4.2.6 temperature degree control 　　以测 temperature hot electrical is temperature parts, 配以测 temperature milli formed is temperature plant/unit, material and injection molding processing mold electrical hot electrical 流 通断, has selection solid material 筒各段 temperature degree and injection molding processing mold temperature degree. table/sheet 5列出 一 plastics molding processing temperature degree scope/range, can 供参考. 　　 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. 1.4.2.7 clamping control 　　 clamping is large machine force will injection molding processing mold combined 紧, 以抵挡 injection molding processing process melt plastics high pressure injection and filling injection molding processing mold injection molding processing mold 发生 巨 large force. 　　关妥 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 processing 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 processing 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 processing machine is belt/tape clamping pressure table/sheet, this need according to 连杆 伸直情况 判断 injection molding processing mold is true combined 紧. if certain injection molding processing 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 processing 时就会出现胀模, made parts 就会出现 flash or its it 毛病. 1.4.2.8 mold opening control 　　当熔 melt plastics injection mold cavity inner and cooling formed rear, 随 便 is mold opening as, 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. 1.4.3 injection molding processing process conditions control 　　 currently, injection molding processing machine injection molding processing processing development 出 各式各样 程序 control methods, large has: injection speed degree control, injection pressure control, mold cavity inner plastics amount control, screw back pressure and speed and other 塑炼状态 control. achieve process process control is improve/increase products quality, make machine can to most large degree 发挥. 1.4.3.1 injection speed degree control 　　 injection speed degree control is will screw injection separation is 3～4 stage/phase, in stage/phase in separation use 各自适当 injection speed degree. 例如: in melt plastics rigid through gate decrease slow injection speed degree, in process in using/adopting high speed injection, in 充模结束时 decrease slow speed degree. using/adopting this methods, can anti material, remove flow marks and decrease/reduce products residual stress and other. 　　 low speed 充模时流 speed 平稳, products dimensions comparison stability, relatively small, products internal stress low, products inner outer toward force 趋于一致（例如 will certain poly carbon acid made parts 浸入四 chlorine carbon in, use high speed injection molding processing molding made parts has cracking toward, low speed cracking ）. in relatively is slow conditions lower, material temperature 差, especially is gate front rear material temperature large, has 助于避免 shrink and 凹陷 发生. due to time relatively long easy make made parts delamination and combined defect 熔接痕, effect/influence appearance, but also make machine strong/high degree large large reduce. 　　 high speed injection 时, material speed degree fast, high speed 充模顺利时, material very fast type 腔, material temperature decline less, degree decline less, can using/adopting relatively low injection pressure, is types hot material 充模态势. high speed can made parts gloss degree and slip degree, remove 接缝线 phenomenon and delamination phenomenon, shrinkage small, color uniform 一致, for made parts relatively large separation can ensure 丰满. easy generate products 发胖起泡 or made parts 发黄, 甚至烧伤变焦, or formed demolding difficult, or 出现充模不均 phenomenon. for/regarding high degree plastics has can can melt 破裂, make made parts surface generate 云雾斑. lower 列情况 can using/adopting high speed high pressure injection: （1） plastics degree high, cooling speed degree fast, long process/workflow made parts using/adopting low pressure slow speed can full type 腔各 角落; （2）壁 thick thin made parts, material to thin easy cold 凝而滞留, must using/adopting one-time high speed injection, make material can amount a large amount of consumption front 立即进入 type 腔; （3） use glass fiber reinforcement plastics, or has relatively a large amount of filling material plastics, flow property 差, is to surface light slip uniform made parts, must using/adopting high speed high pressure injection. for high grade precision products, thick made parts, thick large and tool has relatively thick and made parts, most good using/adopting more grade injection, grade, grade, grade 甚至五 grade. 1.4.3.2 injection pressure control 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. grade pressure injection can make made parts 顺利充模, also 不会出现 weld lines, 凹陷, flash and warpage deformation. for/regarding thin made parts, more small parts, long process/workflow large type made parts 模塑, type 腔配置不太均衡 and clamping 不太紧密 made parts 模塑都 has benefits. 1.4.3.3 注入 mold cavity inner plastics filling amount control 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. 1.4.3.4 screw back pressure and speed control high back pressure can make material obtain strong/high 剪切, low speed make plastics in machine inner to relatively long time. currently relatively more use for back pressure and speed meanwhile 进行程序 design control. 例如: in screw amount full 行程先 high speed, low back pressure, again to relatively low speed, relatively high back pressure, rear formed high back pressure, low speed, most rear in low back pressure, low speed lower 进行塑化, this 样, screw front material pressure to large separation 释放, decrease/reduce screw 转动惯 amount, from improve/increase screw amount 精确程 degree. high back pressure 往往造 formed color agent color degree increase large; machine combined machine screw machine abrasion loss increase large; cycle long, production efficiency decline; nozzle easy 发生流涎, recycled material amount increase; make using/adopting 自锁式 nozzle, if back pressure high design elastic 簧闭锁 pressure, 亦会造 formed fatigue bad. therefore, back pressure pressure need 调 恰当. technology 进步, will small type machine nano injection molding processing machine control system, using/adopting machine control injection molding processing process already formed is can can. Japan made N—PACS（ micro type electronics machine control system ） can to 四 反馈 control （ holding pressure adjustment, pressure adjustment, 自动计 amount adjustment, resin temperature degree adjustment ） and process control （ injection speed degree control, holding pressure 检验, screw speed control, back pressure control ）. 1.4.4 injection molding processing molding front 准备工 as molding front 准备工 as can can inner very more. 如: material material processing properties 检验（测定 plastics flow property, water separation content and other ）; raw materials processing front color and 选粒; material preheating and drying; parts and preheating; mold trial and material 筒清洗 and other. 1.4.4.1 raw materials 预处理 according to plastics features and material 情况, generally in molding front for raw materials appearance and process property can testing. if use plastics is powder 状, 如: polyvinyl chloride (PVC), also 应进行配 material and dry mixed; if products has color requirements, can add amount color agent or masterbatch material; supply material 往往含 has different degree water separation, agent and its it easy low separation material, especially is tool has wet toward plastics 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 for water polycarbonate (PC) water separation content requirements in 0.2% below/following, 甚至0.03%～0.05%, therefore commonly used true drying drying. already drying plastics must 妥善密封保存, anti plastics from gas in again wet 而丧失 drying 效果, is using/adopting drying material can is injection molding processing 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 processing machine small use material amount 2.5倍. 1.4.4.2 嵌 parts preheating injection molding processing molding products is assembly and strong/high degree requirements, need in products in metal parts. injection molding processing molding 时, in mold cavity in cold metal parts and hot plastics melt cooling 时, due to metal and plastics shrinkage rate significantly different, make parts generate very large internal stress （ especially is polystyrene (PS) and other rigid property high poly material more more significantly ）. this type of internal stress in make parts 周围出现 cracks, products use property can large large reduce. this can through selection thermal expansion coefficient large metal （ aluminum, and other ） as parts, and will parts （ especially is large metal parts ） preheating. meanwhile, design products in parts 周围安排 relatively large thick and other measures. 1.4.4.3 machine 筒 清洗 new injection molding processing 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 processing 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 hot property plastics, poly chlorine dilute material, can use low density polyethylene (PE), polystyrene (PS) and other 进行 渡换 material 清洗, again use processing new material 置换出 渡清洗 material. 1.4.4.4 demolding agent selection demolding agent is can make plastics products easy demolding material 质. hard acid zinc suitable for remove polyamide (PA) outer generally plastics; liquid wax used for polyamide (PA) type plastics relatively good; silicon price 昂贵, use 麻烦, relatively less use. use demolding agent control amount, amount less use or use. spray coating amount effect/influence products appearance, for products color 饰也会 generate defect effect/influence. 1.5 injection molding processing machine as process precautions formed good injection molding processing machine as for improve/increase machine lifespan and production safety large has benefits. 1.5.1开 machine front: （1）检查 electrical appliances control inner is has water, 油进入, electrical appliances 受潮, 切勿开 machine. repair will electrical appliances parts dry rear again machine. （2）检查供 electrical electrical pressure is combined, generally ultra- ±15%. （3）检查急停开关, front rear safety 门开关 is positive 常. electrical machine and 油泵 转动 direction is 否一致. （4）检查各 cooling pipeline is 否畅通, for cooling device and machine 筒端部 cooling water sleeve/set cooling water. （5）检查各 active 动部位 is has lubricated 油（脂）, add lubricated 油. （6）打开 electrical hot, for machine 筒各段进行 add temperature. 当各段 temperature degree to requirements 时, again temperature time, make machine temperature degree stability. temperature time according to different equipment and plastics raw materials requirements has different. （7） in material inner add 足足够 plastics. according to injection molding processing different plastics requirements, has raw materials most good drying. （8） need cover/cap good machine upper thermal insulation 罩, this can electrical can, also can long electrical hot and electrical 流接触 device lifespan. 1.5.2操 as process in: （1）不 need is 贪图方便, 随意取消 safety function. （2） attention/notes pressure temperature degree, temperature need ultra- 出规定 scope/range. liquid pressure 油 理想工 as temperature degree maintain in 45～50℃ between, generally in 35～60℃ scope/range inner comparison combined 适. （3） attention/notes adjustment 各行程限位开关, machine in as generate 撞击. 1.5.3工 as 结束时: （1）停 machine front, will machine inner plastics dry 净, anti material oxidation or long hot separation understanding. （2）应 will injection molding processing mold 打开, make machine long time 处于闭锁状态. （3） workshop must has equipment. injection molding processing mold and other heavy parts 时应十 separation small 心, ensure production safety. 1.6 injection molding processing products generate defect causes and its methods in injection molding processing molding processing process in can can due to raw materials 处理不 good, products or injection molding processing mold design combined 理, as has combined process as conditions, or machine 械方面 causes, make products generate 注不满, 凹陷, flash, bubbles, cracks, warpage deformation, dimensions and other defect. for plastics 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. production 实践证明, products defect main/primary in injection molding processing mold design, manufacturing degree and abrasion loss degree and other 方面. 但事实 upper, plastics processing injection molding processing processing technology 人员往往苦于面 for use process 手段 弥补 injection molding processing mold defect belt/tape issues formed large difficult 局面. production process in process adjustment is improve/increase products quality and output/production volume necessary 途径. due to injection molding processing cycle very short, if process conditions 掌握不 good, waste product 就会源源不绝. in adjustment process 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 and understanding, issues 也不知道 is 何道理. adjustment process 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. 1.6.1 plastics molding 不完整 this is 一 经常遇 to issues, comparison easy solution. use process 手段确实 solution 不 时, can from injection molding processing mold design manufacturing upper 考虑进行改进, generally is can solution. 一, equipment 方面: （1） injection molding processing machine 塑化容 amount small. products quality ultra- injection molding processing machine most large injection quality 时, 显然 供 material amount is 入不敷出. products quality injection molding processing machine injection quality 时, has 一 塑化不够充 separation issues, material in machine inner hot time 不足, 结果不 can and toward injection molding processing mold provide 适当 熔 material. this type of has more amount large injection molding processing machine can solution issues. has plastics nylon （ especially is nylon 66 ）熔 melt scope/range narrow, ratio hot relatively large, use 塑化容 amount large injection molding processing machine can ensure material supply. （2） temperature degree 计显示 temperature degree true 实, high low, formed material temperature low. this is due to temperature plant/unit hot electrical and its or temperature milli 伏计失灵, or is due to 远离测 temperature electrical hot aging or 烧毁, add temperature 失效而 also 未曾发现 or has and 时修复 more 换. （3） nozzle inner 孔直径太 large or small. small, due to 流通直径 small, material strip/profile ratio increase large, easy cold, 堵塞进 material or consumption injection pressure; large, 则流通截面积 large, plastics mono 位面积 pressure low, formed force small 状况. meanwhile non type plastics 如ABS因没 has obtain large hot can make degree decline formed 充模困 difficult. nozzle and runner 入口配 combined defect, 常常发生模 outer material, inner 充不满 phenomenon. nozzle flow retardant force very large or has material, plastics 炭化沉积 material and other 堵塞; nozzle or runner 入口球面 loss 伤, deformation, effect/influence and for 方 良 good combined; base/seat machine fault/failure or 偏差, make nozzle and runner generate 倾侧位移 or toward pressure 紧面脱离; nozzle ratio runner 入口球径 large, 因边缘出现间隙, in material lower increase large nozzle toward force 都会造 formed products 注不满. （4） plastics block add material 通道. due to plastics in material drying device inner local 熔化结 block, or machine material temperature degree high, or plastics and other grade selection 不当, or plastics inner lubricant more make plastics in 进入进 material shrink 径位置 or screw 起螺端 deep inner 早 熔化, material and material versus 黏结形 formed “ 桥”, 堵塞通道 or screw, screw as sliding, can front 移, formed material in or random 则波动. this type of has in 凿通通道, troubleshooting material block rear can to solution. （5） nozzle cold material 入模. injection molding processing machine usually 都因顾 and pressure loss 失而 装直通式 nozzle. is if machine front and nozzle temperature degree high, or in high pressure lower machine front material more, generate “流涎”, make plastics in 未开始 injection injection molding processing mold 敞开 情况 lower, outer 抢先进入主 runner 入口并 in sheet/plate cooling function lower hard, 而妨碍熔 material 顺畅 进入 type 腔. this 时, reduce machine front and nozzle temperature degree and decrease/reduce machine 筒 储 material amount, decrease low back pressure pressure machine front material density large. （6） injection molding processing cycle short. due to cycle short, material temperature and upper 也会造 formed material, in electrical pressure large especially obvious. need according to electrical electrical pressure for cycle as versus adjustment. adjustment generally 不考虑 injection and holding pressure time, main/primary adjustment from holding pressure to screw that time, effect/influence molding conditions, also can long or shrink short material in machine inner preheating time. 二, injection molding processing mold 方面 （1） injection molding processing mold system has defect. runner small, thin or long, increase retardant force. runner increase 直径, runner, separation runner formed relatively good. runner or relatively large, force 不足; runner, gate has 杂质, material or material 堵塞; runner, gate coarse has 伤痕, or has 锐角, surface coarse degree defect, effect/influence material 流不畅; runner has cold material or cold material small, direction for; for/regarding more type injection molding processing mold need fine runner and gate large small separation 配 均衡, 否则会出现 has runner or gate coarse short type can 够注满而 its it type can 注满 情况. 应适当 add coarse runner 直径, make to runner 末端 熔 material pressure drop decrease/reduce, also need add large runner relatively type gate, make type 腔 注入 pressure and material speed degree basic 一致. （2） injection molding processing mold design combined 理. injection molding processing mold separation complex, more, material selection 不当, runner narrow, gate amount or 形式不当; products local very thin, increase products or local thick degree, or in filling 不足处 附近设置辅助 runner or gate; mold cavity inner gas measures force formed made parts phenomenon is 屡见不鲜, this type of defect large more in products 转弯处, deep 凹陷处, by thick separation thin separation and use gate molding thin housing/shell and other 处. remove this type of defect design 包括开设 has 效 排 gas 孔道, selection combined gate make gas easy 预先排出, necessary 时特意 will type 腔 困 gas certain local made formed parts, make gas from parts 缝隙溢出; for/regarding more type injection molding processing mold easy gate separation balanced 情况, necessary decrease/reduce injection type 腔 数 amount, ensure its it type made parts combined 格. 三, process 方面 （1）进 material adjustment 不当, material or more material. add material amount or add material control system as positive 常, injection molding processing machine or injection molding processing mold or as conditions 限导致 injection cycle 反常, back pressure small or machine inner material density small can can formed material, for/regarding pellets large, more material and crystallization property ratio 容变化 large plastics polyethylene (PE), polypropylene (PP), nylon and other and degree relatively large plastics 如ABS应调 relatively high material amount, material temperature high 时应调 large material amount. machine 筒端部存 material more 时, injection screw need consumption outer more injection pressure pressure 紧, machine inner ultra- 额囤 material, this large large reduce mold cavity plastics has pressure make products difficult 以充满. （2） injection pressure low, injection time short, or screw 退回太早. melt plastics in low as temperature degree lower degree relatively high, flow property 差, relatively large pressure and speed degree injection. ratio in made ABS color color made parts 时, color agent high temperature resistance property made machine add hot temperature degree, this need ratio usually high injection pressure and long injection time 弥补. （3） injection speed degree slow. injection speed degree for/regarding 一 形状 complex, thick thin large, process/workflow long products, and degree relatively large plastics toughened property ABS and other tool has separation 突出 意义. using/adopting high pressure can products 时, can using/adopting high speed injection can 克服注不满 毛病. （4） material temperature low. machine front temperature degree low, type 腔 熔 material due to injection molding processing mold cooling function make degree upper rise to difficult flow 步, for 远端 充模; machine rear temperature degree low, degree large plastics flow difficult, retardant screw front 移, 结果造 formed pressure table/sheet pressure 足够而实际 upper material in low pressure low speed lower type 腔; nozzle temperature degree low can can is solid add material nozzle long time and cold injection molding processing mold dispersion hot amount, or nozzle add hot hot or defect formed material temperature low, can can injection molding processing mold material 通道; if injection molding processing mold belt/tape cold material 井, use nozzle, using/adopting rear add material 程序, nozzle relatively can maintain temperature degree; rigid machine nozzle cold has can use 火焰枪做 outer add hot accelerated nozzle rise temperature. raw materials plastics flow property 差. plastics injection molding processing processing use recycled material, recycled material 往往会反映出黏 degree increase large toward. 实验指出: due to oxidation understanding formed separation 子断链 mono 位体积 density increase, this increase in machine and type inner flow viscous property, recycled material long relatively more gas material generate, make injection pressure loss increase large, formed 充模困 difficult. is improvement plastics flow property, 应考虑 add outer lubricant hard acid or its salt type, most good use silicon 油（黏 degree 300～600cm2/s）. lubricant add improve/increase plastics flow property, also improve/increase stability property, decrease/reduce gas material gas retardant. 1.6.2 溢 material （ flash ） 溢 material also flash, 溢边, and other, large more in injection molding processing mold separation combined upper, 如: injection molding processing mold separation type 面, slip block slip 配部位, parts 缝隙, 顶杆 孔隙 and other 处. material and solution will 会进一步 expand large 化, from pressure injection molding processing mold formed local 陷塌, formed property loss 害. parts and 顶杆孔隙 溢 material also make products in upper, effect/influence demolding. equipment 方面 （1） machine true positive clamping force 不足. selection injection molding processing machine 时, machine clamping force must high injection molding processing molding products toward 投影面积 in injection formed force, will formed 胀模, flash. （2） clamping plant/unit adjustment 不佳, machine has 伸直, generate or left right or upper lower clamping 不均衡, injection molding processing mold degree can to phenomenon formed injection molding processing mold mono 侧一边 by combined 紧而另一边不密贴 情况, injection will flash. （3） injection molding processing mold 本身平行 degree 不佳, or 装 不平行, or sheet/plate 不平行, or 拉杆受 force distribution 不均, deformation 不均, this will formed clamping 不紧密而 generate flash. （4）止回 ring abrasion loss heavy; elastic nozzle elastic 簧失效; material or screw abrasion loss large; material cooling system 失效造 formed “架桥” phenomenon; machine 筒调定 注 material amount 不足, 缓冲垫 small and other can can formed flash 反复出现, must and repair or more parts. injection molding processing mold 方面 （1） injection molding processing mold separation type degree 差. active sheet/plate （如 in sheet/plate ） deformation warpage; separation type upper has material or frame has 凸出 橇印毛刺; injection molding processing mold 因早先 flash pressure make type 腔周边 fatigue 塌陷. （2） injection molding processing mold design combined 理. injection molding processing mold type 腔 开设位置 偏, injection injection molding processing mold mono 边发生张 force, flash; plastics flow property good, polyethylene (PE), polypropylene (PP), nylon and other, in melt lower degree very low, easy active or solid 定 缝隙, requirements injection molding processing mold manufacturing degree relatively high; in effect/influence products property front lower amount in quality for in upper, in products thick 实 部位入 material, can anti 止一边缺 material belt/tape flash 情况; products in or its has molding 孔时, upper in upper 开设侧 gate, in relatively large injection pressure lower, if clamping force 不足模 this separation function force 不够发生 light micro warpage formed flash, injection molding processing mold belt/tape has active parts 时, its 侧面 投影面积也受 molding pressure function, if force 不够也会造 formed flash; sliding type combined degree defect or solid type and type 腔安装位置偏移而 generate flash; type gas defect, in separation type upper has gas or gas shallow or deep large or material retardant will formed flash; for more type injection molding processing mold attention/notes separation runner combined gate combined design, will formed 充模受 force 不均而 generate flash. process 方面 （1） injection pressure high or injection speed degree fast. due to high pressure high speed, for injection molding processing mold force increase large 导致溢 material. need according to products thick thin adjustment injection speed degree and injection time, thin products need use high speed speed 充模, rear again 进注; thick products need use low speed 充模, let table/sheet in to pressure front large solid lower. （2） add material amount large formed flash. value attention/notes is need is anti 止凹陷而注入 more material, this 样凹陷未必 can “填平”, flash 却会出现. this type of application long injection time or holding pressure time solution. （3） machine 筒, nozzle temperature degree high or injection molding processing mold temperature degree high make plastics degree decline, flow property increase large, in 流畅进模 情况 lower formed flash. raw materials 方面 （1） plastics degree high or low can can flash. degree low plastics nylon, polyethylene (PE), polypropylene (PP) and other, improve/increase clamping force; water property strong/high plastics or for water plastics in high temperature lower large degree reduce flow degree, increase flash can can property, for this plastics must drying; recycled material more plastics degree decline, necessary need 补充滞留 formed separation. plastics degree high, flow retardant force increase large, generate large back pressure make mold cavity pressure improve/increase, formed clamping force 不足而 generate flash. （2） plastics raw materials degree large small 不均时会 make add material amount 变化不定, made parts or 不满, or flash. 1.6.3 凹痕（塌坑, 瘪形） 因 plastics cooling hard 化而造 formed shrinkage 凹陷, main/primary in thick 壁位置, strip/profile, machine housing/shell, 螺母嵌 parts and other 处. equipment 方面 （1）供 material 不足. screw or abrasion loss heavy, injection and holding pressure material 发生漏流, reduce pressure and material amount, formed material 不足. （2） nozzle large or small. small easy 堵塞进 material 通道, large will make force small, 充模发生困 difficult. injection molding processing mold 方面 （1） gate small or runner or shallow, runner efficiency low, retardant force large, material cooling. gate can large, 否则失 剪切 speed rate, material degree high, 同样不 can make products saturated 满. gate 应开设 in products thick 壁部位. runner in necessary has 足够容 amount cold material can troubleshooting cold material type make 充模持续进行. gate, gate gate long degree need control in 1mm below/following, plastics in gate solid fast, effect/influence pressure 传递; necessary can increase gate or gate 位置以 meet/satisfy need; runner long thick 时, in runner 边缘设置排 gas 沟槽, decrease/reduce gas for material retardant function. （2） more gate injection molding processing mold need adjustment gate speed degree, most good for 称开设 gate. （3） injection molding processing mold key/critical 部位应 has 效 设置 cooling water 道, ensure injection molding processing mold cooling for remove or decrease/reduce shrinkage very good 效果. （4）整 injection molding processing mold belt/tape 毛刺且 tool has can clamping property, can high pressure, high speed, low degree material 充模. process 方面 （1） increase injection pressure, holding pressure pressure, long injection time. for/regarding flow property large plastics, high pressure generate flash 引起塌坑应适当 reduce material temperature, reduce machine front and nozzle temperature degree, make type 腔 熔 material 容积变化 decrease/reduce, easy cold solid; for/regarding high degree plastics, improve/increase machine temperature degree, make 充模容 easy. shrinkage in gate 区域时应延 long holding pressure time. （2） improve/increase injection speed degree can relatively make made parts 充满并消 remove large separation shrinkage. （3） thin made parts improve/increase injection molding processing mold temperature degree, ensure material 流顺畅; thick made parts decrease low mold temperature accelerated table/sheet solid type. （4）延 long made parts in inner cooling time, maintain uniform production cycle, increase back pressure, screw front 段保留一定 缓冲垫 and other has decrease/reduce shrinkage phenomenon. （5） low degree products and 早出模 let its in gas in or hot water in slow cooling, can make shrinkage 凹陷平缓 also effect/influence use. raw materials 方面: raw materials soft easy 发生凹陷, has methods is in plastics in add nucleating agent add fast crystallization. products design 方面: products design make thick uniform, amount 避免壁 thick 变化, polypropylene (PP) this category of shrinkage very large plastics, thick degree ultra- 出50%时, most good use strip/profile add thick 部位. 1.6.4 银纹, bubbles and gas plastics in process in to gas dry 扰常常 in products surface silver streaks or micro small bubbles or products thick inner formed bubbles. this gas 体 源 main/primary is raw materials in has water separation or easy material or lubricant amount, can can is material temperature high plastics hot time long degradation generate degradation gas. equipment 方面: nozzle small, material material in nozzle 处流涎 or wire drawing, machine or nozzle has material or 毛刺, high speed material 流经 时 generate scratch hot make material separation understanding. injection molding processing mold 方面: （1） due to design upper defect, 如: gate 位置不佳, gate small, more gate made parts gate 排布不 for 称, runner fine small, injection molding processing mold cooling system combined make mold temperature 差异太 large and other formed material in mold cavity inner flow 不连续, 堵塞 空 gas 通道. （2） injection molding processing mold separation type less necessary gas or gas 孔道不足, 堵塞, 位置不佳, also has parts, 顶针之 type processing 缝隙排 gas, molding in gas can in plastics 进入时 meanwhile 离. （3） injection molding processing mold surface coarse degree 差, scratch retardant force large, formed local hot 点, make through plastics separation understanding. process 方面 （1） material temperature high, formed separation understanding. machine temperature degree high or add hot 失调, 应逐段 decrease low machine temperature degree. add material temperature degree high, make separation plastics melt 充满螺槽, gas method from add material 口排出. （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） use more injection decrease/reduce 银纹: in speed injection runner → slow speed gate → fast speed injection → low pressure slow speed will 模注满, make inner gas can in and troubleshooting dry 净. （6） 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. raw materials 方面 （1） raw materials in mixed types plastics or material in a large amount of powder material, melt easy belt/tape gas, has 时会出现银纹. raw materials 受污染 or has has property material raw materials easy hot separation understanding. （2） recycled material material structure hydrophobic 松, micro in 储留 空 gas amount large; recycled material recycled more or and new material ratio/proportion high （ generally small 于20%）. （3） raw materials in has property solvent agent or raw materials in liquid additives 如助染 agent 白油, lubricant silicon 油, increase agent ester and stabilizer, anti-static agent and other use amount more or mixed combined 不均, 以积集状态进入 type 腔, formed 银纹. （4） plastics has drying or from large gas in 吸潮. for raw materials separation drying use drying material 斗. （5） has grade plastics, 本身不 can relatively high temperature degree or relatively long hot time. especially is has micro amount water separation 时, can can catalytic reaction. for this type plastics need add outer lubricant hard acid and its salt type （每10kg material can add 至50g）, amount reduce its processing temperature degree. products design 方面: thick thick, table/sheet cooling speed degree different. in injection molding processing mold manufacturing 时应适当 add large runner, separation runner and gate dimensions. 1.6.5 熔接痕 熔 melt plastics in type in due to to parts, 孔洞, speed 不连贯 区域, material in 断 区域而以 more 股形式汇 combined and gate 喷射充模时, can full melt combined generate 线状 熔接痕. 熔接痕 存 in large low products machine strong/high degree. 克服熔接痕 办 method and decrease/reduce products methods basic same. equipment 方面: defect, melt temperature degree 不均, can long cycle, make more full, necessary more 换塑化容 amount large machine. injection molding processing mold 方面 （1） injection molding processing mold temperature degree low, 应适当 improve/increase injection molding processing mold temperature degree or has improve/increase 熔接缝处 local temperature degree. （2） runner fine small, or shallow, cold material small. increase runner dimensions, improve/increase runner efficiency, meanwhile increase cold material 井 容积. （3） expand large or shrink small gate 截面, gate 位置. gate need amount melt in parts, 孔洞 周围 flow. 发生喷射充模 gate need method positive, or add block 缓冲. amount use or less use more gate. （4）排 gas defect or has gas 孔. 应开设, expand or hydrophobic gas 通道, its in utilizing parts, 顶针缝隙排 gas. process 方面 （1） improve/increase injection pressure, long injection time. （2）调 good injection speed degree: high speed can make material and drop temperature to combined 处, low speed can let type inner gas has time 排出. （3）调 good machine and nozzle temperature degree: temperature degree high plastics degree small, 流态通畅, 熔接痕变 fine; temperature degree low, decrease/reduce gas material separation understanding. （4） demolding agent amount less use, especially is silicon demolding agent, 否则会 make material can melt combined. （5） reduce clamping force, 以利排 gas. （6） improve/increase screw speed, make plastics degree decline; increase back pressure pressure, make plastics density improve/increase. raw materials 方面 （1） raw materials drying amount decrease/reduce formulation in liquid additives. （2） for flow property or hot property high plastics 适当添 add lubricant and stabilizer, necessary use flow property good or heat resistant property high plastics. products design 方面 （1）壁 thick small, add thick made parts 以免 早 solid 化. （2）嵌 parts 位置不当, adjustment. 1.6.6 发脆 products very large separation is due to internal stress formed. formed products causes very more, main/primary has: equipment 方面 （1） machine inner has or material, easy promote material degradation. （2） machine 塑化容 amount small, plastics in machine inner 塑化不充 separation; machine 塑化容 amount large, plastics in machine inner hot and 受剪切 function time long, plastics easy aging, make products 变脆. （3） ejection plant/unit or balanced, dry 截面积 small or distribution 不当. injection molding processing mold 方面 （1） gate small, 应考虑 adjustment gate dimensions or increase 设辅助 gate. （2） separation runner small or 配置不当, amount balanced combined or increase separation runner dimensions. （3） injection molding processing mold structure defect formed injection molding processing cycle 反常. process 方面 （1） machine 筒, nozzle temperature degree low, high it. if material material easy degradation, improve/increase machine 筒, nozzle temperature degree. （2） reduce screw back pressure pressure and speed, make material is hydrophobic 松, decrease/reduce plastics 因剪切 hot formed degradation. （3） mold temperature high, demolding difficult; mold temperature low, plastics cooling, 熔接缝 melt combined defect, easy cracking, especially is high melting point plastics polycarbonate (PC) and other more is 如此. （4） type type need has demolding degree. type difficult demolding 时, need improve/increase type temperature degree, shrink short cooling time; type difficult 脱时, need reduce type temperature degree, long cooling time. （5）尽 amount less use metal parts, polystyrene (PS) this category of property cold hot ratio large plastics, more can add parts injection molding processing. raw materials 方面 （1） raw materials mixed has its it or 掺杂 不适当 or amount solvent agent or its it additives 时. （2） has plastics 如ABS and other, in 受潮状况 lower add hot and water 汽发生 catalytic reaction, make made parts large 应变. （3） plastics recycled 次数太 more or recycled material content high, or in machine inner add hot time long, 都会促 make made parts 脆裂. （4） plastics quality 不佳, molecular weight distribution large, has rigid property separation and other non-uniform structure formed separation has amount large; or its it plastics 掺杂污染, defect additives 污染, 灰尘杂质污染 and other is formed causes. products design 方面 （1） products belt/tape has easy 出现应 force cracking 尖角, or thick degree versus very large 部位. （2） products design thin or 镂空太 more. 1.6.7 变 color formed color causes is more 方面, main/primary has: equipment 方面 （1） equipment dry 净. or its it powder 尘沉积 in material upper make material material 受污染变 color. （2） hot electrical 偶, temperature or add hot system 失调造 formed temperature 控失灵. （3） machine in has material, easy promote plastics degradation; machine or inner has metal material, abrasion make plastics color. injection molding processing mold 方面 （1） injection molding processing mold gas defect, plastics by hot pressure shrink, in high temperature high pressure lower and oxygen gas reaction, plastics. （2） injection molding processing mold gate small. （3） material in or inner lubricant, demolding agent more. necessary 时应定期清洁 material 筒, remove ratio plastics heat resistant property also anti-static property and other additives. （4） nozzle 孔, runner and separation runner dimensions small. process 方面 （1） screw speed high, back pressure large. （2） machine 筒, nozzle temperature degree high. （3） injection pressure high, time long, injection speed degree fast make products color. raw materials 方面 （1） material material by 污染. （2） water separation and material content high. （3） color agent, additives separation understanding. 1.6.8黑斑 or liquid formed this type of defect causes main/primary is in equipment and raw materials 方面: equipment 方面 （1） machine in has 焦黑 材 material. （2） machine has 裂痕. （3） screw or abrasion loss. （4） material 斗附近不清洁. injection molding processing mold 方面 （1） type inner has 油. （2） from ejection plant/unit in 渗入油. raw materials 方面 （1） raw materials 不清洁. （2） lubricant 不足. 1.6.9 烧焦 dark 纹 一 equipment injection hot property plastics rear, machine 筒未清洗 dry or nozzle has material 垫导致 injection 开始时排 gas 不畅. injection molding processing mold 方面 （1）排 gas defect. （2） gate small or gate 位置不当. （3） type local retardant force large, make material combined relatively slow formed gas difficult. process 方面 （1） machine 筒, nozzle temperature degree high. （2） injection pressure or back pressure high. （3） injection speed degree fast or injection cycle long. raw materials 方面 （1） pellets 不均, has powder 末. （2） raw materials in material content high. （3） lubricant, demolding agent use amount more. 1.6.10 gloss good equipment 方面 （1）供 material 不足. （2）换 material machine 筒未清洗 dry 净. injection molding processing mold 方面 （1） gate small or runner fine. （2） type surface coarse degree 差. （3）排 gas defect or mold temperature low. （4）没 has cold material 井. process 方面 （1） machine add hot non-uniform, machine temperature degree high or low. （2） nozzle small or back pressure low. （3） injection speed degree large or small. （4）塑化 non-uniform. raw materials 方面 （1） raw materials drying 处理. （2）含 has property material 质. （3） additives or demolding agent use amount more. 1.6.11 demolding difficult （ gate or parts shrink in injection molding processing mold inner ） 一 equipment 方面: ejection force 不够. injection molding processing mold 方面 （1） demolding structure combined or 位置不当. （2） demolding degree 不够. （3） mold temperature high or gas defect. （4）浇道壁 or type surface coarse 糙. （5） nozzle and injection molding processing mold material combined 不服帖 or nozzle large material 口直径. process 方面 （1） machine temperature degree high or injection amount more. （2） injection pressure high or holding pressure and cooling time long. raw materials 方面: lubricant 不足. 1.6.12 warpage deformation injection molding processing mold 方面 （1） gate 位置不当 or amount 不足. （2） ejection 位置不当 or products force non-uniform. process 方面 （1） injection molding processing mold, machine temperature degree high. （2） injection pressure high or injection speed degree fast. （3） holding pressure time long or cooling time short. raw materials 方面: 酞氰系颜 material effect/influence polyethylene (PE) crystallization degree 而导致 products deformation. products design 方面 （1）壁 thick 不均, 变化突然 or thick small. （2） products structure type 不当. 1.6.13 dimensions unstable equipment 方面 （1） add material system positive 常. （2） back pressure or temperature 不稳. （3） liquid pressure system fault/failure. injection molding processing mold 方面 （1） gate and runner dimensions 不均. （2） type dimensions 不准. process 方面 （1） mold temperature or cooling 回路不当而致 mold temperature control combined 理. （2） injection pressure low. （3） injection holding pressure time or has 波动. （4） machine temperature degree high or injection cycle unstable. raw materials 方面 （1）换批 production 时, resin property can has 变化. （2） material material pellets large small random 律. （3）含 wet amount relatively large. （4） more additives for shrinkage has effect/influence. 1.6.14 crazing 汽白 一 injection molding processing mold 方面: ejection machine 构不佳. process 方面 （1） machine temperature degree low or injection molding processing mold temperature degree low. （2） injection pressure high. （3） holding pressure time long. raw materials 方面 （1） lubricant, demolding agent or use amount more. （2） grade, product grade suitable. products design 方面: products design combined 理, local force in. 1.6.15 delamination 剥离 一 process 方面 （1） machine 筒, nozzle temperature degree low. （2） back pressure low. （3） for/regarding PVC plastics, injection speed degree fast or injection molding processing mold temperature degree low can can formed delamination 剥离. raw materials 方面 （1） raw materials or mixed material. （2） different plastics mixed 杂. 1.6.16 肿胀 and has plastics products in molding demolding rear, very fast in metal parts or in especially thick 部位出现肿胀 and 鼓泡, this is due to full cooling hard plastics in inner pressure function lower gas 体膨胀造 formed. solution measures: （1） reduce mold temperature, long mold opening time. （2） reduce material drying temperature degree and processing temperature degree; reduce speed rate; decrease/reduce molding cycle; decrease/reduce flow retardant force. （3） improve/increase holding pressure pressure and time. （4） improvement products 壁面太 thick or thick thin large 状况. 1.6.17 production slow （1） plastics temperature degree high, products cooling time long. reduce machine temperature degree, decrease/reduce screw speed or back pressure pressure, adjustment good machine 筒各段 temperature degree. （2） injection molding processing mold temperature degree high, effect/influence type, also formed 卡, made parts machine. need has for property add strong/high water cooling. （3）模塑 time unstable. using/adopting or semi 自动操 as. （4） machine hot amount 不足. using/adopting can force large machine or add strong/high for material preheating. （5） improvement machine production conditions, pressure, amount, clamping force and other. （6） nozzle 流涎. control good machine and nozzle temperature degree or use 自锁式 nozzle. （7） made parts thick thick. 应改进 injection molding processing mold, decrease/reduce thick. 2. injection system injection system is injection molding processing machine 心脏部 separation, its function is ensure 定时, amount material material add thermoplastic 化, rear 以一定 pressure and fast speed degree versus one-time injection amount melt plastics mold cavity inner, injection also need has holding pressure time toward mold cavity inner 补充一部 separation cooling shrinkage material, make products and anti mold cavity inner material material 反流. therefore, injection plant/unit must ensure plastics uniform 塑化, has injection pressure and holding pressure pressure. can meet/satisfy this requirements injection plant/unit main/primary has 柱塞式, 柱塞— screw 式, screw and other.