moldflow 改善产品变形问题

1.ProjectSummary22.Plasticmaterialinformation--33.

Analysispurpose&Processcondition44.Partinformation,Runnerandcoolingsystemdesign6~85.Analysisresult9~276.Conclusion&suggestion28MoldFlowReport2006-06-26MoldFlowReportcase1case2MoldNO：Ｂ１０２７４Preparedby:Bill.BinCavitynumber:1*2Analysispurpose:

improvewarpage。AnalysisProject:Cool+Fill+Pack+WarpCase1isthe3Ddesign.Case2isrevisemolddesignandmodifiedtheprocesscondition.2006-06-26MaterialPropertyViscosityvsShearrateP-V-TABS

PolylacPA-737Manufacturer:ChiMeiCorporation1.MeltDensity:0.96055g/cu.cm8.MeltTemperatureMaximum240deg.C2.SolidDensity:

1.0494g/cu.cm9.MoldTemperatureMinimum40deg.C3.EjectionTemperature

90deg.C10.MoldTemperatureMaximum80deg.C4.RecommendedMold60deg.C11.MaximumShearRate500001/s5.RecommendedMeltTemperature220deg.C12.MaximumShearStress0.5Mpa6.Fillerunfilled13.Thermalconductivity0.19(k)w/m.c7.MeltTemperatureMinimum200deg.C14.MeasuredMFR3g/10min(5kg/200.C))2006-06-26ProcesssettingAnalysispurpose:improvewarpageAnalysisProject:Cooling+flow+WarpageProcesssettingcase1MoldTemperature:60/65℃MeltTemperature:220℃

FillTime:automaticCoolingtime:60SV/Pswitch-over:99%offilledvolumepack80%V/P10Scase280%X0.3+0X1.5+6X60%+12X100%S2006-06-26PartinfomatiomThicknessdistribution2006-06-26CoolingsystemdesignAllcaseisbase2dmolddesign.2006-06-26RunnersystemdesignCase1isbase2dmolddesign

，Ø12mmØ10mmØ8mmØ2.8~8mmØ10~2.8mmcase12006-06-26Runnersystemdesigncase2Samecase1Samecase1Samecase1case2isreviserrunnersystem(movegate)Movegate2006-06-26FillTimeThefilltimeresultshowsthepositionoftheflowfrontatregular,asthecavityfills.EachcolorcontourrepresentthepartsofthemoldWhichwerebeingfilledatsametime..Thefilltimeisabout5.6secondinthemodel.Noracetrackeffectoccur.Airtrapappearonthelastfilledarea.Dosetenoughventoverthere.case2case12006-06-26FillTimeThefilltimeresultshowsthepositionoftheflowfrontatregular,asthecavityfills.EachcolorcontourrepresentthepartsofthemoldWhichwerebeingfilledatsametime..Thefilltimeisabout5.6secondinthemodel.Noracetrackeffectoccur.Airtrapappearonthelastfilledarea.Dosetenoughventoverthere.case2case12006-06-26PressureatV/PswitchoverTheresultshowsthepressuredistributionthroughtheflowpathinsidethemoldattheSwitchoverpointfromvelocitytopressurecontrol.case1case22006-06-26AirTrapTheairtrapsareshowinpinknodecase1case22006-06-26AirTrapTheairtrapsareshowinpinknodecase1case22006-06-26WeldlineNoticethepositionsoftheweldlines,whichmayaffectthequalingofthepartappearancebutwhichmaybeaffectthepartstructuralfunctions..case1case22006-06-26波前温度Themelttemperatureis220℃,thisthemperatureatflowfrontisallow.case1case22006-06-26Pressureatinjectionlocation:XYPlotTheresultshowsthepressureandclampforceatvarioustimesduringthefillingandpackingphasesoftheanalysis.case1case22006-06-26Clampforce:XYPlotTheresultshowsthepressureandclampforceatvarioustimesduringthefillingandpackingphasesoftheanalysis.case1case22006-06-26circuitcoolanttemperatureThecoolinganalysisscreenoutputcontainsthechangeincoolanttemperaturefromcoolant-intocoolant-outIftheincreaseisunacceptable(greaterthan2-3deg.c)case1case22006-06-26TimetofreezeTheresultshowsthethicknessofthefrozen.Ahighervaluerepresentsathickerfrozenlayer,whilelowvaluemeansathinnerpolymermelt(flow)layerCooingchannelneedtonearsprue,forreducecycletime.case2case12006-06-26TemperaturemoldThetemperaturemoldresultshowstheaveragetemperatureoftheplasticmoldinterfaceatthetopside,ofthemoldelementduringthecycletime.Theresultdisplaysinthemoldsurfacehasasmallrange..case2case12006-06-26VolumetricShrinkageatEjectionTheVolumetricshrinkageatejectionresultcanbeusedtodetectsinkmarksonthemodel.Volumetricshrinkageshouldbeuniformacrossthewholeparttoreducewarpage.Highshrinkagevaluescouldindicatesinkmarksorvoidsinsidet