精密注射成型技术的研究进展---------中英翻译.docx

PrecisioninjectionmoldingtechnologyofprogressAuthor:MasakiMikellChenChunAbstract:Introductionaboutprecisioninjectionmoldingtechnologyofthepolymermaterials,anddiscussionaboutfactorswhichimpacttheprecisioninjectionmolding,includingtheprecisionofthemold,thecontrolaccuracyoftheinjectionmoldingmachine,theprocesscontrolofprecisioninjectionandothercomputercontroltechnology.Discussedtoeachofthesefactors,andgiventherelevantsolutions,finally,introduceanumberofadvancedmoldingtechnology.Keywords:PrecisionInjection,InjectionMachine,PrecisionInjectionMoldInrecentyears,withtherapiddevelopmentoftheelectronics,telecommunications,healthcare,automotive,andotherindustries,thedemandtohigh-precisionandhighperformanceofplasticproductsisincreasingdaybyday,promptedprecisionmoldingtechnologycontinuestoprogress,newtechnologiescontinuetoemerge.Precisioninjectionmoldingproductsnotonlyrequirehighdimensionalaccuracy,lowwarpage,gdtowrite,butalsorequireexcellentopticalproperties,LInjectionmoldingisthemostimportantmethodoftheplasticmolding,includingplasticsplastics,injection,andpacking,severalbasiccoolingprocess,sotherearemanyfactorswhichcanimpactprecisioninjectionmolding.1 PrecisionMoldTbcreatesophisticatedproducts,precisionmoldisessential.GenerallytheaccuracyoftheMoldcontrolledbythemoldtemperature,theprecisionmanufacturingmoldandtheselectionofplasticshrinkageratewhenmolddesign.1.1 TheControlPrecisionofTheMoldTemperatureGeneralprecisionpartsintheinjectionmolding,temperaturecontrolofmoldistoincreaseproductivity.However,theimpactoftemperaturecontrolofmoldforprecisioninjectionmoldingisgreat，itaffectscomponentofcontraction,shape,crystallization,stressandsoon,thereforemolddesigntemperaturelooptemperaturedistributionattherequestreasonable,controlaccuracyisprecise.Wenpreferredmodecontrolandacool-watermachine.Moldtemperaturecontrolandcoolingtimeonproductperformanceandtheimpactisasfollows,31:(I)MeItplasticinjectionandthecycletimeofmoldcavitycanmakefluctuationsofthetemperaturedifference,thereforebetominimizethevolatilityworsepeaks.(2)Heattransferofmoldisthroughtheconcreteandmolddiewithinthemediaaroundtheworld.Moldisunchangedandthereforecontrolofthemediaisthekey,thegeneralimportandexportofitscoolingwatertemperatureislessthan1'C,applicationofthetheorytotheaveragetemperaturecalculated14,thiscanguaranteethestabilityofheattransfer.(3)Stablestateofmoldtomaintainabalancebetweenabsorptionanddistributionofheat,injectionmoldingmachineshouldstrictlymaintainastabletemperature.1.2 TheDesignAndManufactureofPrecisionMoldThepremisetoguarantprecisioncomponentsizeofplasticismolddesigninordertoimprovetheprecisionofprecisioninjectionmold,usingcomputer-aidedanalysisisnecessaryinthedesignprocess,especiallyonthegatingsystemandthebehaviorofmoldtemperaturecontrolsystemheatdistributionanalysis.1.3 TheUseofPrecisionMoldDesignShrinkageRatePrecisioninjectionmoldingmachinegenerallyhaslargerinjectionofpower,makedifficultiestomolddesign,sizeandcavitysizeprecisioncontrolproducts.Precisionplasticpartsofthedesignpriortomanufacturesimplemoldtomeasurethemoldingpartoftheactualshrinkage,thiswillgreatlyimprovetheaccuracyofcomponentsize.2 BestPrecision!injectionMoldingProcessParametersSettingsTothebestmoldingprocessparameterstoreduceplasticproducts,theshrinkagerate.Partsofthewallthicknessdifferenceisgenerallyconsideredbythetwofactors:.(1)Melthypertensioncausedbymoldcavityminordeformation;(2)Whenthemoldcavityflexibilityofthematerialafterexpansion.3 PrecisionInjectionMoldingMachineUsedtoReplaceConventionalInjectionMoldingMachinePrecisioninjectionmoldingmachinegenerallylargerinjectionofpower,Besidesmeetinjectionpressureandinjectionrateofrequirements,Powerwillbeinjectingitselfontheaccuracyofacertainroleintheimprovement.3.1 TheconsistencyofmoldingcycletimeGeneraltypicalinjectionmoldingmachinewiththreemodes：manual,semi-automaticandfullyautomatic.Duetotheinfluenceofvariousfactors,intheformertwomodelsundereachmoldingcycletimevary,thiswillaffectthemoldtemperatureandmeltmaterialsintheresidencetime,therebyaffectingtheprecisionofthepartsmade,soinPrecisionmoldingshouldmaximizetheuseoffullyautomaticmodel,41.3.2 TheTemperatureControlofPrecisionInjectionMoldingMachine,AndANewDesignofScrew.Injectionbarrelautomaticthermostatonthecycleofsexualrelationsandtheopeningofthestovetomeltdensityandviscositychanges.Productsthusaffectingthequalityandaccuracyofthecyclicalfluctuations;injectionmoldingmachinenozzleclosetothemoldcavity.Therefore,thenozzletemperatureofmoldingcomponentwillhaveanimportantimpact.4 PrecisionMoldingTechnology4.1 ApplicationofTheMoldInjectionCompressionMolding(ICM)TechnologyICMTechnologyisthemeanstoopenacertaindistancefromthemoldundertheconditionsofthebeginninginjection,injectionofacertainamount,closetothebeginningdiecavitymeltimplementationofthecompression,Diecompletelyclosedattheterminationofinjection,andthenpacking,coolinguntiltheremovalproducts.4.2 TheHigh-speedInjectionMoldingHigh-speedinjectionmoldingmethodoffillingmeltsfas