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ID:44790699
大小:485.50 KB
页数:36页
时间:2019-10-29
《注射模塑技术》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、GEPlasticsINJECTIONMOLDINGe注射模塑技术2001.8.21InjectionMoldingIntroductionGOODPARTMaterial材料Tooling模具Processing工艺Design设计好产品Equipment设备InjectionMoldingEquipmentMACHINESHOTSIZE机器注射容量(PC)PartWeight=20-75%ofMachineShotSize制件重量=20-75%机器注射容量OptimalPartWeight=40~60%ofMachineShotS
2、ize制件重量=40-60%机器注射容量InjectionMoldingEquipmentCLAMPSIZE锁模力MaterialSelection选料ProjectedArea投影面积PartDesign产品设计WallThickness壁厚FlowLength流动长度InjectionPressure&Speed注射压力和速度InjectionMoldingEquipmentInjectionMoldingEquipmentScrewTypeMachinesAreRecommended推荐采用的螺杆类型UniformPlastic
3、izing均匀塑化LessPressureLoss低压力损耗FasterCycles更快成型周期UniformStockTemperature均匀储料温度StreamlinedMeltFlow线性熔融流动InjectionMoldingEquipmentMetering计量Feed进料ScrewandCylinderDesign螺杆和料筒设计hfhmL/D=20:1(16~24:1)CompressionRatio压缩比=hf/hm=2~2.5:1(1.5~3:1)Cylinderbi-metallicforAbrasionResis
4、tance双金属料筒Transition过渡LDInjectionMoldingEquipmentReciprocatingScrewTipAssembliesCheckRingTypeNonreturnValveMaterialFlowsPastOpenCheckRingCheckRingSlidesBackToPreventBlackFlowDuringInjectionCheckRingValvesareSuggestedInjectionMoldingEquipment往复式螺杆头结构检查环类型:止回环熔融树脂流过开放检查环检
5、查环关闭,防止在注塑过程中料的回流建议采用止逆阀InjectionMoldingEquipmentStandardCylinderNozzles标准料筒喷嘴HeatingBand加热环CylinderBore料筒主体ToMoldProvidesMechanicalandThermalConnectionFromHotCylindertoColderMold提供从热的料筒到相对冷的模具的机械和热连接到模具InjectionMoldingSprueBushing主流道衬套Nozzle喷嘴Radius半径Orifice主流道孔口Nozzle
6、喷嘴LandLength0.0to4.76mmOpening4.76to9.52mm开口:4.76~9.52mmSprueBushingis0.8mmLargerthanDimensiononNozzle主流道衬套孔口要比喷嘴口径大0.8mmAsShortasPossible尽可能地短AccurateheatingcontrolandGoodHeaterBandCovering精确的加热控制和好的加热带覆盖InjectionMoldingEquipmentProcessing工艺Start-up:开车:PurgewiththeCorr
7、ectMaterial用正确料清洗UseCorrectConditions采用正确Processing加工参数InjectionMoldingProcessDowntime:停车:Shorttime:HoldMaterialinBarrelfor10~15min短期:存料10~15分钟Longtime:CleantheBarrel长期:用正确方法和次序彻底清理RecommendedPurgeMaterials推荐清洗料PolymerPurgeMaterial聚合物清洗料Cycolac/CycoloyPMMA,PS,SANLexanPC
8、,PMMA,HDPEInjectionMoldingProcessInjectionMoldingProcessImportantProcessVariables重要加工参数MeltTemperature熔融温度Mold
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