PPTcoursewareforPlasticMoldProfessionalEngli目錄contentsIntroductiontoplasticmoldsProfessionalEnglishvocabularyforplasticmoldsThedesignandmanufacturingprocessofplasticmolds目錄contentsCommonproblemsandsolutionsofplasticmoldsThedevelopmenttrendandfutureprospectsofplasticmoldsCHAPTERIntroductiontoplasticmolds01DefinitionofplasticmoldAplasticmoldisatoolusedtoshapeplasticproductsbyheatingorcoolingplasticmaterialstoformtheminsidethemold,therebyproducingtherequiredplasticproducts.CompositionofplasticmoldsPlasticmoldsareusuallycomposedofamoldbaseandamoldcore.Themoldbaseisusedtosupportandfixthemoldcore,whilethemoldcoreisusedtoshapeplasticproducts.DefinitionofplasticmoldsAccordingtotheclassificationofmoldingmethods,plasticmoldscanbedividedintoinjectionmolds,compressionmolds,extrusionmolds,injectionmolds,etc.Accordingtodifferentplasticmoldingprocesses,correspondingmoldtypesareselected.Accordingtotheclassificationofmoldstructures,plasticmoldscanbedividedintosinglepartingsurfacemolds,doublepartingsurfacemolds,sidepartingsurfacemolds,etc.Accordingtothestructureandproductionrequirementsofplasticproducts,suitablemoldstructuresareselected.ClassificationofplasticmoldsAutomotiveindustryPlasticmoldsarewidelyusedintheautomotiveindustry,suchasthemoldingofcomponentssuchasbumpers,instrumentpanels,anddoorpanels.HomeapplianceindustryManyplasticproductsinhouseholdappliancescannotbeformedwithoutplasticmolds,suchaswashingmachines,refrigerators,airconditioners,etc.DailynecessitiesindustryManyplasticproductsindailylifeareformedthroughplasticmolds,suchastableware,toys,cosmeticspackaging,etc.ApplicationofplasticmoldsCHAPTERProfessionalEnglishvocabularyforplasticmolds02InjectionmolddesignMoldbaseMoldstructureVocabularyrelatedtoplasticmolddesignCoreinsertVocabularyrelatedtoplasticmolddesignSliderAngleleverVocabularyrelatedtoplasticmolddesignInsertEjectorpinVocabularyrelatedtoplasticmolddesignVocabularyrelatedtoplasticmolddesign010203CoolingsystemAirventGateMachiningcenterVocabularyrelatedtoplasticmoldmanufacturingVocabularyrelatedtoplasticmoldmanufacturing01Lathe02MillingmachineElectricalDischargeMachining(EDM)0302030401VocabularyrelatedtoplasticmoldmanufacturingWirecutting:WireEDMFiveaxismachiningHeattreatmentSurfacetreatment010203OpeningthemoldClosingthemoldInjectionmoldingVocabularyrelatedtoplasticmoldoperationandmaintenanceVocabularyrelatedtoplasticmoldoperationandmaintenanceEjectionInspectionandrepairMaintenanceandupkeepVocabularyrelatedtoplasticmoldoperationandmaintenanceTroubleshooting:TroubleshootingSafetyoperationproceduresCHAPTERThedesignandmanufacturingprocessofplasticmolds03Thisstageinvolvescreatingabasicdesignfortheplasticmoldbasedontheproduct'srequirementsandspecificationsTheconceptualdesignshouldconsiderfactorslikethematerial,geometry,andtheprocessoftheplasticmaterialInthisstage,thedesignisfurtherrefinedanddetailedThemold'scomponents,suchastheactivity,core,andinjectorpins,aredesignedandtheirinteractionsaredefinedThedesignshouldalsoconsidertheeaseofassembly,disassembly,andmaintenanceofthemoldThedetaileddesignisthenconvertedintoengineeringdrawingsanddocumentsThesedrawingsanddocumentsshouldclearlyshowallthedimensions,tolerances,andothercriticalinformationrequiredformanufacturingConceptualDesignDetailedDesignDrawingandDocumentationDesignphaseManufacturingphaseMoldBaseFabric:ThefirststepinthisphaseistomachinethemoldbaseaccordingtothedesigndrawingsThemoldbaseshouldbestrongandstabletosupporttheothermoldcomponentsInsertFabric:ThemoldinsertsaremachinedseparatelyandtheninstalledinthemoldbaseTheseinsertsareresponsibleforshapingtheplasticpartandmustbemadefromwearresistantmaterialsEjectorMechanismAssembly:TheEjectorMechanismisresponsibleforremovingthemoldedpartsfromthemoldItinsistsofinjectorpins,injectorplates,andothercomponentsthatareinstalledinthemoldbaseMoldTestingandAdjustment:Beforethemoldisconsideredreadyforproduction,itundergoesaseriesofteststoensurethatitmeetsthedesignrequirementsandspecificationsAnyissuesoreffectsinthemoldareaddressedduringthisstageTrialandadjustmentstageFirstTrialRun:ThefirsttrialrunisconductedwiththenewmoldtocheckifitfunctionsasintendedThistrialhelpsidentifyanyissuesorproblemswiththemold'sdesignormanufacturingAdjustments:Ifanyissuesareidentifiedduringthetrialrun,theyareaddressedthroughadjustmentstothemold'sdesignormanufacturingprocessThisiterativeprocesscontinuesuntilthemoldperformssatisfactorilyProductionRun:Oncethemoldisdeadreadyaftersuccessfultrials,itcanbeusedforproductionrunsItisessentialtomonitorthemoldclosureduringproductiontoensureconsistentqualityandidentifyanypotentialissuesearlyMaintenanceandRepair:Overtime,moldsmayrequiremaintenanceorrepairduetowearandtearordamageRegularinspectionandtimelyrepairscanhelpextendthelifeofthemoldandmaintainitsperformanceCHAPTERCommonproblemsandsolutionsofplasticmolds04OverflowissueOverflowissueSummaryOverflowisoneofthecommonproblemsintheproductionprocessofplasticmolds,whichisusuallycausedbyexcessiveinjectionvolumeorunreasonablemolddesign.Overflownotonlyaffectstheappearanceandqualityoftheproduct,butmayalsocausemoldblockageordamage.DetaileddescriptionTosolvetheoverflowproblem,thefollowingmeasurescanbetakenSolutionBasedonthesizeandshapeoftheproduct,settheinjectionvolumereasonablytoavoidexcessiveinjection.1.AdjustinjectionvolumeCheckwhetherthemolddesignisreasonable,especiallywhetherthepositionsofthefeedingpointsandoverflowslotsareappropriate.2.CheckthemolddesignMaintainstablemoldtemperaturetoavoidinjectionpressurefluctuationscausedbyhighorlowtemperatures.3.OptimizemoldtemperatureOverflowissueSummaryMaterialshortageissueDetaileddescriptionMaterialshortagereferstothedefectintheproductcausedbyplasticnotcompletelyfillingthemoldcavityduringtheinjectionprocess.Shortageofmaterialsmaybecausedbyinsufficientinjectionvolume,insufficientinjectionpressure,lowmoldtemperature,orpoorplasticfluidity.ShortshortproblemSolution:Toaddresstheshortageofmaterials,thefollowingmeasurescanbetakenAdjusttheinjectionpressureandtime:increasetheinjectionpressureandextendtheinjectiontimeappropriatelytoensurethattheplasticfullyfillsthemoldcavity.Checkthemoldtemperature:Ensurethatthemoldtemperatureisappropriatetomaintaingoodfluidityoftheplastic.Checkthequalityofplastic:Ensurethattheplasticusedisofqualifiedqualityandfreefromimpuritiesorbubbles.ShortshortproblemWarpageissueSummaryWarpagereferstothedeformationphenomenonofplasticproductsduringthecoolingprocess,usuallycausedbyuneventemperaturedistributioninthemoldorinsufficientcoolingtime.Warpingcanaffectthedimensionalaccuracyandappearancequalityoftheproduct.DetaileddescriptionWarpageissueSolution:Toaddresstheissueofwarping,thefollowingmeasurescanbetakenOptimizethetemperaturedistributionofthemold:Byadjustingthemoldtemperature,thetemperatureofeachpartofthemoldcavityiskeptconsistenttoavoidlocaloverheatingorundercooling.Controlcoolingtime:Basedonthethicknessoftheproductandthepropertiesoftheplastic,setthecoolingtimereasonablytoensurethattheproductisfullycooledandshaped.Checkproductdesign:Duringtheproductdesignphase,theshrinkagerateanddeformationtrendofplasticsshouldbefullyconsideredtooptimizetheproductstructure.WarpageissueCHAPTERThedevelopmenttrendandfutureprospectsofplasticmolds05HighperformancepolymersWiththedevelopmentofpolymermaterials,moreandmorehighperformancepolymersareappliedtoplasticmolds,improvingtheperformanceanddurabilityofplasticproducts要點(diǎn)一要點(diǎn)二CompositematerialsCompositematerials,suchasglassfiberreinforcedplastics,carbonfiberreinforcedplastics,etc.,arewidelyusedinthemanufacturingofplasticmoldstoimprovethestrengthandstiffnessofplasticproductsApplicationofhi