Shanghai Daoqin Plastics Co., Ltd.

plastics in container extrusion blow molding fault/failure troubleshooting fault/failure formed and countermeasures type 坯垂伸(1)脚陋踱太 high or other process parameters control 不当. 应适当阵i肋L身 and machine temperature degree, adjustment 期虹呓 parameters. (2) type extrusion speed degree slow. 应适当 add fast. (3)闭模 speed degree slow. 应适当 add fast. (4) raw materials inner water separation content high. 应进行预 drying 处理. (5) raw materials melt flow rate high. selection melt flow rate relatively low resin. (6) machine structure design combined 理. using/adopting 勺‘ dispersion type machine type shrink (1) raw materials combined molding requirements. selection density relatively high or melt flow rate relatively low resin. (2)熔 material temperature degree high. 应适当 reduce machine and machine temperature degree. (3) molding cycle long. 应适当 improve/increase screw speed, shrink short molding cycle type 坯卷曲(1)口模出 material adjustment 不当, material non-uniform. 应适当 adjustment 口模间隙, make its material uniform. (2) machine add hot non-uniform. 应检查 machine add hot device and temperature plant/unit has loss bad, adjustment machine temperature degree distribution, make its uniform. (3) extrusion speed degree fast. 应适当 decrease slow. (4) machine runner design combined 理. 应修改 design, increase pressure ring. made thin container 时, by machine in, type 坯悬挂 in 口模边缘 upper, type 坯卷曲. for 此, will 口模平面 and 芯模平面置于同一平面 or front high 于芯模平面. (5)熔 material temperature degree low. 应适当 improve/increase type 坯卷边(1)口 mold temperature degree high, type toward inner 卷边. 应适当 reduce mold temperature degree. meanwhile, reduce extrusion speed degree, add large 口模缝隙. (2)芯 mold temperature degree high, type toward outer 卷边. 应适当 reduce mold temperature degree. (3)口模 and 芯模 口模平面 processing combined 理. 口模平面应略 high 于芯模平面 type 坯吹胀破裂(1)吹胀 ratio large. using/adopting relatively small ratio, usually control in 1: 3 left right. (2)口模出 material non-uniform. 应适当 adjustment 口模间隙, make its material uniform. (3) type extrusion speed degree slow. 应适当 add fast. (4)闭模 rear blow molding speed degree slow. 应适当 add fast. (5) type surface 伤痕. 应检查 machine separation has loss 伤, and abrasion runner surface, improve/increase surface light degree. (6) raw materials inner mixed material 杂质. more new material and machine and material 筒. (7) clamping force 不足. 应适当 increase type bubbles (1) raw materials inner water separation content high. 应进行预 drying 处理. (2) machine or machine temperature degree high, material hot separation understanding. 应适当 reduce machine or machine temperature degree, especially is material material temperature degree can high, shrink short material in material in time. (3)空 gas from material 斗处进入 material 筒. 应适当 add fast screw speed, increase 滤网层数 and 目数, improve/increase extrusion back pressure. (4) machine or injection molding parts mold upper has gas cracks or machine 头接头处密封 defect. 应进行密封处理. (5) pressure shrink gas gas gas. 应检查 gas and 芯轴 结 combined 部位, for gas 处进行密封处理. (6) raw materials heat stabilized property 不足. adjustment formulation type gas (1)熔 material temperature degree high. 应适当 reduce. (2) blow molding pressure high or gas 针孔直径太 large. 应适当 reduce gas pressure or shrink small gas 孔直径. (3)吹胀 ratio control 不当. 应进行 adjustment. (4) injection molding parts mold and type upper has local hot 点. 应检查 add hot plant/unit, remove hot type surface coarse 糙(1) type surface light degree 太差. improve/increase type surface light degree. (2)熔 material temperature degree low. 应适当 improve/increase machine or machine temperature degree. (3)熔 material defect. 应适当 reduce screw speed, improve/increase machine temperature degree, reinforcement material 塑化. (4) blow molding pressure low. 应适当 improve/increase gas pressure or expand large gas 针孔 直径. (5)吹 gas 针孔周围漏 gas. 应密封漏 gas 部位. (6) machine runner design combined or surface coarse 糙. will machine runner processing formed type, runner surface tool has relatively high surface light degree. (7) raw materials in mixed material. use new material, 并清理 material or machine 头. (8) type in by 拉伤. in 芯模棱边 design 0．3—0．5mm semi 径 圆角 or using/adopting expand dispersion type machine 头. (9) type extrusion speed degree fast. 应适当 decrease slow. (10) injection molding parts mold type surface has cold water. improve/increase injection molding parts mold temperature degree. (11)当连续 blow molding 时, type surface coarse 糙. 应适当 reduce extrusion pressure. (12)当往复 blow molding 时, type surface coarse 糙. its troubleshooting methods is: ①适当 improve/increase material temperature degree. ②换 use melt flow rate relatively high resin. ③适当 reduce extrusion pressure. ④ adjustment extrusion speed degree, control type 坯 落 lower time, make extrusion speed degree 置于熔 melt unstable 区域之 outer type surface 凹凸不平(1)熔 material temperature degree high. 应适当 reduce machine temperature degree (2) machine add hot non-uniform. 应检查 add hot device and temperature plant/unit is loss bad. (3)熔 material defect. adjustment screw speed, increase material type surface “鲨鱼皮”(1) extrusion speed degree control 不当. 不适当 extrusion speed degree 会导致 melt 破裂, especially is made high density polyethylene (PE) in container most easy generate this type of fault/failure. in blow molding 时, 应适当 reduce extrusion speed degree and pressure; in blow molding 时, 应适当 improve/increase extrusion speed degree. (2) type molding temperature degree low. 应适当 improve/increase. usually, high density polyethylene (PE) type molding temperature degree is 170—210'C, low density polyethylene (PE) is 150—190~C type surface strip/profile 纹(1) extrusion machine, sleeve/set or machine runner inner has material or type design defect, 导致熔 material 积滞, separation understanding and 破裂, separation understanding material material in runner inner type surface generate strip/profile 纹. for 此, remove runner inner material 死角. (2) machine runner inner has 划痕. light runner surface, remove 划痕. (3) extrusion machine and sleeve/set, machine and sleeve/set assembly defect, generate material 死角. heavy new assembly. (4) injection molding parts mold inner has 滞流挂 material. 应适当 improve/increase injection molding parts mold temperature degree and increase blow molding pressure. (5)熔 material temperature degree high, hot separation understanding. 应适当 reduce material temperature degree, remove separation understanding material material. (6) injection molding parts mold temperature degree and material temperature degree temperature large. 应适当 improve/increase injection molding parts mold temperature degree, shrink small temperature 差. (7) raw materials in has material 杂质. 应净化处理. (8) extrusion back pressure low. 应适当 improve/increase. (9) machine add hot device loss bad. type surface generate or 起伏状 strip/profile 纹时, very can can is machine add hot device loss bad, make material in machine cold by 牵曳, from generate surface strip/profile 纹. for 此, 应检修 machine add hot device. (10)当 slow speed extrusion large type in container 时, generally using/adopting slow speed extrusion thick type large type machine 头, due to blow molding cycle effect/influence, type extrusion speed degree relatively slow. in blow molding 时, container surface generate 沿圆周 direction uniform distribution dry strip/profile thick thin strip/profile 纹, generally can 见15—40 strip/profile and other, strip/profile 纹 壁 thick 差约0．2—Innn left right. this extrusion direction 圆周均布 竖 strip/profile 纹俗称“西瓜皮” strip/profile 纹. its troubleshooting methods is: type surface strip/profile 纹①尽 amount using/adopting melt flow rate relatively low resin. ② separation control machine temperature degree, reduce type temperature degree, improve/increase sheet/plate temperature degree. ③ machine runner 设置尽 amount for 称, generate material unstable flow. ④ in machine material 人口处设置 retardant 流段, in retardant rear again 设置一 形状 for 称 膨胀区, make material in machine 头时, to for tensile. ⑤尽 amount 不设置 滤 sheet/plate and using/adopting separation 流梭式 machine 头. ⑥适当 improve/increase extrusion speed degree. ⑦当掺 mixed use types molecular weight or separation structure different raw materials 时, 应先进行共熔 pelletizing type surface 口模印迹(1) machine runner inner has and loss 伤. abrasion machine runner. (2)口模 inner has material. 应清理口模. (3)熔 material temperature degree high. 应适当 reduce machine temperature degree. (4) blow molding speed degree slow. 应适当 add fast. (5) blow molding pressure 不足. 应适当 improve/increase. (6) injection molding parts mold temperature degree low. 应适当 improve/increase. (7) type 腔棱边太锋利. in 棱边处设置0．3—O．5mm semi 径 圆角 type 坯皱褶(1)熔 material temperature degree high. 应适当 reduce. (2) machine type short. 应适当 add long. (3)口模出 material adjustment 不当, material non-uniform. 应适当 adjustment 口模间隙, make machine material uniform. (4)熔 material strong/high degree low. troubleshooting methods is: ①适当 reduce material temperature degree. ②适当 increase recycled material use amount. ③适当 reduce extrusion machine back pressure. ④适当 decrease slow type 坯 传递 speed degree. ⑤适当 add fast clamping speed degree. ⑥ type 坯放入 blow molding front, toward type inner less gas, 进行预 blow molding type surface color and color 泽不均(1) machine or machine runner 污染. 应进行清理. (2)熔 material temperature degree high. 应适当 reduce machine or machine temperature degree, shrink short material in material inner time. (3) extrusion scratch hot high. use pressure shrink comparison small screw. (4) color agent wet 结团. 应烘千处理 or use new material. (5) polyvinyl chloride (PVC) raw materials add 入邻苯二甲 acid ester front 搅拌不足. 应适当延 long time type 坯污染(1) raw materials 污染. molding system maintain 清洁, resin system 应密闭, use recycled material must 洁净. (2)熔 material hot separation understanding. 应避免熔 material in high temperature 区域滞留 time long. (3) machine runner inner has material 死角. 应修整 machine runner, remove material type mold sticking (1) type long. shrink short type 坯尾部 in outer time. (2) injection molding parts mold 截坯口 design combined 理. 应修改 design, make type in 截坯口处“ pressure shrink cooling ” container demolding defect (” container 筋部未 design demolding degree. 应修改 injection molding parts mold, 筋部应 design 1: (50—100) demolding degree. (2) container 底部凹槽太 deep. amount decrease/reduce deep degree. (3) injection molding parts mold temperature degree high. 应适当 reduce. (4)截坯口处 cooling defect. for 截坯口处 add strong/high cooling. (5) molding cycle short. 应适当延 long. (6)熔 material temperature degree high. 应适当 reduce. (7) container in gas mold sticking. this main/primary is due to gas 杆周围 temperature degree high, add strong/high gas cooling, can in gas upper 钻2—8 small 孔, is 0．25—0．38mm, 孔距均布. in addition, also 应适当 reduce type temperature degree difficult from container upper lower (1)切边刀口太 wide. 应适当修 narrow, generally is 1, 0～2．5mm. (2)切边刀口不平. 应修平刀口. (3) clamping pressure 不足. 应适当 improve/increase 切口部 separation thin (1) blow molding pressure and blow molding time control 不当. 应适当 adjustment. (2) injection molding parts mold gas defect. type surface 应喷砂处理, improvement injection molding parts mold gas conditions. (3) flash more. decrease/reduce flash. (4)截坯破 loss heavy. anti 止截坯破 loss 切口部 separation thick (1) blow molding 模 切口缝隙 adjustment 不当. 应适当 adjustment. (2)切口 loss bad. 应修复 loss bad 部位. (3)切口 flash thick. 应适当 adjustment flash amount. (4)熔 material temperature degree low. 应适当 improve/increase 切口部 separation combined defect (1) type temperature degree low. 应适当 improve/increase. (2)切边刀口太锋利. adjustment wide degree, generally control in 1．0—2．5mm切口部 separation strong/high degree 不足(1)熔 material temperature degree low. 应适当 improve/increase. (2) injection molding parts mold temperature degree low. 应适当 improve/increase. (3)切刀 structure design combined 理. rear control in 30~—45’, wide degree control in 1．0—2．5mm切口部 separation has bubbles {1)切刀 rear control 不当. control in 30~—45‘. (2) clamping fast. 应设置 slow clamping plant/unit container has bubbles (1) raw materials in water separation content high. 应进行预 drying and preheating 处理. (2) machine assembly defect, generate material bubbles. heavy new assembly machine container 熔塌(1) melt lower 垂. for/regarding rate relatively low raw materials, 应适当 improve/increase machine 头, injection molding parts mold and material temperature degree, decrease slow type 坯 滴落 speed degree. (2) screw temperature degree high. 应进行 cooling container flash heavy (”熔 material temperature degree high. 应适当 reduce. (2) type bending. adjustment type for uniform degree. (3) clamping defect. 应检查 clamping process. (4) injection molding parts mold clamping force 不足. add large clamping force. (5)起始 blow molding time and pressure control 不当. 应适当 adjustment. (6)截坯刀口太 wide. narrow 刀口. (7)截坯刀口不平直. 应校／iETJ口 平直 degree blow molding material (1)熔 material temperature degree high. 应适当 reduce. (2) blow molding pressure high. 应适当 reduce. (3) injection molding parts mold separation 离. 应适当 add large clamping force. (4)排 gas large. 应适当 shrink small. gas design formed deep 0．8mm, long 1—4mm, 并逐渐 add deep injection molding parts mold blow molding 不足(1)供 gas tube/pipe retardant 塞, gas defect. 应检查供 gas and pressure, remove retardant material, ensure gas 通畅. (2)截坯口太锋利. 截坯口截面应 is 3—5mm. (3)截坯口处 temperature degree high. make injection molding parts mold cooling uniform container 爆裂(1) injection molding parts mold separation 离. 应适当 add large clamping force or use clamping force relatively large blow molding machine. (2) container cooling defect. 应适当延 long cooling time. (3) type 坯爆裂. use melt strong/high degree relatively high resin or use specifications relatively large container in 熔接痕处破裂(1)熔 material temperature degree control 不当. material temperature degree high or low 都会导致 container in 熔接痕处破裂, 应适当 control. (2) injection molding parts mold temperature degree control 不当. 应适当 adjustment. (3) molding cycle long. 应适当 shrink short. (4) blow molding 模切口区域 has fault/failure. 应检查 troubleshooting container in clamping 线处破裂(1) clamping force 不足. add large clamping force. (2) injection molding parts mold for defect, generate 错位. positive for 齐. (3) clamping cooling defect. improvement clamping cooling conditions. (4) injection molding parts mold gas defect. type surface 应喷砂处理 container 底部破裂(1) machine or machine temperature degree low. 应适当 improve/increase. (2) injection molding parts mold cooling defect. add strong/high cooling. (3) blow molding pressure control 不当. 应适当 adjustment. (4) mold opening fast. container inner gas pressure full 部消失 rear can mold opening container or cracking (1)熔 material temperature degree low, container 沿拼缝线 or 夹断线处出现 small 孔, 缝隙部位出现 cracking. 应适当 improve/increase material temperature degree. (2) clamping force 不足, blow molding process in injection molding parts mold light micro 胀开, container 吹破. 应适当 improve/increase clamping force. (3) blow molding pressure high, type in 吹胀时急 speed 膨胀, container 吹破. 应适当 reduce blow molding pressure. (4)闭模 speed degree fast, container in 夹断线处破裂. 应适当 reduce speed degree. (5) injection molding parts mold 夹断口 切口太锐利 or 太钝, 如切口太锐利会切破 type 坯, 若切口太钝会 make injection molding parts mold combined defect, 都会导致 container 吹破. 应适当 adjustment wide narrow degree. (6)吹胀 ratio large, type 坯吹 太 thin, container 吹破. 应适当 shrink small ratio. (7) raw materials inner mixed has material 杂质. remove material 杂质, raw materials container surface has black spots (1)熔 material hot, separation understanding carbon 化. 应适当 reduce machine or machine temperature degree. (2) material or machine runner inner separation understanding material and slow slow rear by extrusion. 应清理 runner system. (3) raw materials in mixed has 杂质. 应净化 raw materials and more 换 滤网. (4) blow molding gas in has 杂质. 应检查贮 gas inner container surface coarse and has 麻点(1)熔 material temperature degree low. 应适当 improve/increase machine temperature degree. (2) injection molding parts mold temperature degree and ring temperature degree low. 应适当 improve/increase injection molding parts mold temperature degree and production ring temperature degree. (3) injection molding parts mold type surface light degree 太差. abrasion light. (4) injection molding parts mold gas defect. improvement injection molding parts mold gas conditions. (5) blow molding gas pressure 不足. 应适当 improve/increase blow molding pressure, expand large gas dimensions. (6) raw materials combined molding requirements, melt flow rate low. use melt flow rate relatively high resin container surface 熔接痕(1) clamping pressure 不足. 应适当 improve/increase. (2) clamping cooling defect. add strong/high cooling, 并进行预 blow molding 处理. (3) clamping 面不平 or surface has material viscous 附, clamping 不严. 应修平 or clamping 面, make its 紧密贴 combined. (4) injection molding parts mold temperature degree low. 应适当 improve/increase. (5) blow molding pressure low. 应适当 improve/increase or add large blow molding 针孔. (6) machine temperature degree control 不当. 应进行 adjustment. in machine front, temperature degree must to molding temperature degree. (7) machine structure design combined 理, runner material has material 死角. remove material container surface 桔皮纹 and material 痕(1) molding temperature degree control 不当, material temperature degree high or low. 应适当 adjustment. (2) injection molding parts mold temperature degree low. 应适当 improve/increase. (3) machine temperature degree high. 应适当 reduce. (4) type surface cooling water. 应检查 injection molding parts mold is 否渗漏, 并进行封堵处理 container surface 花纹不清晰(1)熔 material temperature degree low. 应适当 improve/increase. (2) blow molding pressure 不足. 应适当 improve/increase. generally blow molding pressure 决定于 type temperature degree, injection molding parts mold temperature degree, container large small and thick thin and other factors. type and mold temperature relatively high, container relatively small 时, blow molding pressure low 一, 反之则 high 一. pressure high low meet/satisfy basic requirements: is type 坯夹人 injection molding parts mold rear, must fast 进行吹胀, make type in injection molding parts mold front less cooling; is cooling 期间必 must make type and type inner 壁紧密接触, ensure mold cavity surface 花纹 清晰 degree. blow molding pressure low 一, in gas amount control upper make gas speed degree low, gas amount large, this can anti gas 引入区附近出现 low pressure, make type inner or type 坯; blow molding stage/phase, blow molding pressure high 一, requirements high to make type inner 图案花纹清晰 in container surface formed 模口膨胀 defect 模口膨胀 is type 坯离开 machine generate expand and phenomenon, has 时也称 processing or type 坯膨胀. 模口膨胀 amount large small for/regarding container molding and its surface quality has relatively large effect/influence. (1)模口膨胀不足. troubleshooting methods is: ①适当 improve/increase material temperature degree. ②适当 add fast type 坯 传递 speed degree. ③适当 improve/increase extrusion machine back pressure. ④ decrease/reduce use or amount use recycled material. ⑤ add fast clamping speed degree. ⑥吹 made relatively light container. (2)模口膨胀太 large. troubleshooting methods is: ①吹 made relatively heavy container. ②适当 reduce material temperature degree. 模口膨胀 defect ③适当 decrease slow type 坯 传递 speed degree. ④适当 reduce extrusion machine back pressure. ⑤ increase recycled material use amount. ⑥适当 decrease slow clamping time, can 推迟2s left right. ⑦ decrease/reduce or in clamping front for type 坯 预吹胀 container warpage deformation (1) blow molding time short. 应适当延 long. (2) blow molding speed degree slow. 应适当 add fast. usually clamping rear 应立即吹胀. (3)熔 material temperature degree high. 应适当 reduce molding temperature degree. (4) container cooling 不当. if demolding rear container temperature degree still very high, 应适当延 long injection molding parts mold cooling time. if container and warpage, in injection molding parts mold 截坯面 upper add strong/high cooling. if container thick different, in thick add strong/high cooling. according to cooling requirements injection molding parts mold cooling 回路. (5) cooling type hot 处理不当. 应进行淬火处理, anti injection molding parts mold warpage deformation container thick non-uniform (1) machine add hot non-uniform. 应检查 machine add hot device is loss bad, 安装位置 is positive 确, make machine add hot uniform. (2) machine 头间隙 adjustment 不当, machine runner inner material pressure 不一致, material non-uniform. according to thick distribution adjustment machine 头间隙. (3) machine in and blow molding in 心不一致. heavy new positive for in. (4) machine or injection molding parts mold 轴芯不垂直. heavy new positive 垂直. (5) extrusion machine 传动皮 belt/tape slip, material amount 变化. 应检修 and 调紧传动皮 belt/tape. (6) extrusion speed degree slow. 应适当 add fast. (7)熔 material temperature degree high. 应适当 reduce. (8) injection molding parts mold design combined 理. 应修改 injection molding parts mold design. (9) raw materials combined molding requirements. selection melt flow rate relatively low resin. (10) injection molding parts mold temperature degree distribution non-uniform. adjustment injection molding parts mold cooling 回路, make temperature degree distribution uniform. (11) blow molding speed degree slow. 应适当 add fast. (12)吹胀 ratio large. 应适当 decrease small. (13) extrusion machine material unstable. 应检查 material has 无堵塞 or “架桥”, material add hot device temperature degree can high container ultra- thin (1) type 坯垂伸. 应适当 improve/increase extrusion speed degree. (2)熔 material temperature degree high. 应适当 reduce. (3)吹胀 ratio large. 应适当 decrease small container shrinkage large (1) container thick. 应适当 decrease/reduce thick degree, amount make thick uniform. (2) injection molding parts mold temperature degree high. 应适当 reduce. (3)熔 material temperature degree high. 应适当 reduce molding temperature degree. (4) blow molding pressure 不足. 应适当 improve/increase. (5) blow molding time short. 应适当延 long. (6) raw materials molding shrinkage large. selection density and shrinkage rate relatively low resin 凝胶(1)粒 material defect. 应适当 improve/increase material temperature or use add hot material 斗, make type in blow molding front can to temperature degree. (2) raw materials 污染. 应净化 resin and recycled material container impact strong/high degree and crazing (]) container structure design combined 理. remove and 避免壁 thick 悬殊. (2)熔 material temperature degree low. 应适当 improve/increase machine temperature degree, 首先应当 improve/increase machine material temperature degree. (3) raw materials combined molding requirements, melt flow rate and density high. more raw materials blow molding cycle long (1) molding temperature degree high, cooling time long. 应适当 reduce material temperature degree, increase blow molding pressure and decrease small thick ．并适当 shrink short cooling time. (2) injection molding parts mold temperature degree high. 应适当 reduce. (3) raw materials selection 不当. selection melt flow rate and density relatively high resin, 以便于 low temperature molding extrusion negative large (1)熔 material temperature degree low. 应适当 improve/increase molding temperature degree. (2) screw pressure shrink ratio large. more screw. (3) machine retardant force large. decrease small machine pressure shrink ratio. (4) electrical machine belt/tape 轮传动 ratio large. decrease small ratio