注塑件成型与设计.pptx

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1、InjectionMoldingandDesign注塑成型与设计InjectionMoldingProcessOverviewPartandToolDesignTerminologyCommonMoldingDefectsMoldedPartDesignBestPracticesInjectionMoldingProcessOverviewInjectionMoldingProcessOverviewInjectionmoldingisusedtoproducemostofourcomplexplasticparts.Injectionmoldingis

2、aprocesswhichinvolvesforcingmoltenplasticintoamachinedmoldcavityunderhighpressure.InjectionMoldingPressTheinjectionmoldingpressoperationincludesameansto:Openandcloseandclamptheinjectionmold.Measure,melt,andinjecttheplasticresin.Coolthemoltenplasticinthemold.Ejectthefinishedpartfr

3、omthemold.Computercontrolsystem.InjectionMoldTheinjectionmoldformsboththeshow(A)sideandtheback(B)sideofthepart.Theshowsideofthepartisgenerallythecavitysideofthetool,andthebacksideisthecoreside.Theinterfacebetweenthecavityandcoreisthepartingline.Thenumberofcavitiesisthenumberofpar

4、tsproducedpercycle.InjectionMoldComponentsCavityCoreClampPlatesEjectorPlate&PinsLiftersSlidesWaterLinesGatesandSpruesHotRunnerSystem,etcHotRunnerManifold&MultipleValveGatesThemanifoldinalargemoldheatsanddeliversthehotplasticfromthemoldingmachinetothegatelocationsonthepart.Lifters

5、-FormDie-LockedFeaturesLiftersaremechanismswhichmoveapproximatelyinthedirectionofthemoldopening(dieangle).Theyareusuallyactivatedbylifterrodsoperatedbytheejectorplate.Liftersoftenmoveonanangletothepartduringmoldopeningandejectiontounlockadie-lockedfeature.MoldOpenMoldClosedDieDir

6、ection(moldopeningangle)LifterCoreSlides-FormDie-LockedFeaturesAcoreslideisamechanismonthecorewhichmovesnormal(90°)todieangledirectiontoformdie-lockfeaturesorundercutsinthepartdesign.Theslideisactuatedbypins,cams,orhydraulicorpneumaticcylindersduringandafterthemoldcavityopens.Sim

7、pleCoreSlideandEjectionPlasticPartEjectionPinCoreWithSlideCavityWithHornPin*Actually,thecavityisstationary,andthecoresidemovestoopenthetoolwhenmountedinthemoldingmachine.AcceleratingEjectionPinInjectionSprueEjectionwithLifterCavityandCorewithLifterandPinPlasticPartEjectionPinCore

8、withlifterCavityTravelingAngledLifterFor