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PrecisioninjectionmoldingtechnologyofprogressAuthorMasakiMikellChenChunAbstractIntroductionaboutprecisioninjectionmoldingtechnologyofthepolymermaterials,anddiscussionaboutfactorswhichimpacttheprecisioninjectionmolding,includingtheprecisionofthemold,thecontrolaccuracyoftheinjectionmoldingmachine,theprocesscontrolofprecisioninjectionandothercomputercontroltechnology.Discussedtoeachofthesefactors,andgiventherelevantsolutions,finally,introduceanumberofadvancedmoldingtechnology.KeywordsPrecisionInjection,InjectionMachine,PrecisionInjectionMoldInrecentyears,withtherapiddevelopmentoftheelectronics,telecommunications,healthcare,automotive,andotherindustries,thedemandtohighprecisionandhighperformanceofplasticproductsisincreasingdaybyday,promptedprecisionmoldingtechnologycontinuestoprogress,newtechnologiescontinuetoemerge.Precisioninjectionmoldingproductsnotonlyrequirehighdimensionalaccuracy,lowwarpage,goodtowrite,butalsorequireexcellentopticalproperties1.Injectionmoldingisthemostimportantmethodoftheplasticmolding,includingplasticsplastics,injection,andpacking,severalbasiccoolingprocess,sotherearemanyfactorswhichcanimpactprecisioninjectionmolding.1PrecisionMoldTocreatesophisticatedproducts,precisionmoldisessential.GenerallytheaccuracyoftheMoldcontrolledbythemoldtemperature,theprecisionmanufacturingmoldandtheselectionofplasticshrinkageratewhenmolddesign.1.1TheControlPrecisionofTheMoldTemperatureGeneralprecisionpartsintheinjectionmolding,temperaturecontrolofmoldistoincreaseproductivity.However,theimpactoftemperaturecontrolofmoldforprecisioninjectionmoldingisgreat2,itaffectscomponentofcontraction,shape,crystallization,stressandsoon,thereforemolddesigntemperaturelooptemperaturedistributionattherequestreasonable,controlaccuracyisprecise.Wenpreferredmodecontrolandacoolwatermachine.Moldtemperaturecontrolandcoolingtimeonproductperformanceandtheimpactisasfollows31Meltplasticinjectionandthecycletimeofmoldcavitycanmakefluctuationsofthetemperaturedifference,thereforebetominimizethevolatilityworsepeaks.2Heattransferofmoldisthroughtheconcreteandmolddiewithinthemediaaroundtheworld.Moldisunchangedandthereforecontrolofthemediaisthekey,thegeneralimportandexportofitscoolingwatertemperatureislessthan1°C,applicationofthetheorytotheaveragetemperaturecalculated4,thiscanguaranteethestabilityofheattransfer.3Stablestateofmoldtomaintainabalancebetweenabsorptionanddistributionofheat,injectionmoldingmachineshouldstrictlymaintainastabletemperature.1.2TheDesignAndManufactureofPrecisionMoldThepremisetoguarantprecisioncomponentsizeofplasticismolddesigninordertoimprovetheprecisionofprecisioninjectionmold,usingcomputeraidedanalysisisnecessaryinthedesignprocess,especiallyonthegatingsystemandthebehaviorofmoldtemperaturecontrolsystemheatdistributionanalysis.1.3TheUseofPrecisionMoldDesignShrinkageRatePrecisioninjectionmoldingmachinegenerallyhaslargerinjectionofpower,makedifficultiestomolddesign,sizeandcavitysizeprecisioncontrolproducts5.Precisionplasticpartsofthedesignpriortomanufacturesimplemoldtomeasurethemoldingpartoftheactualshrinkage,thiswillgreatlyimprovetheaccuracyofcomponentsize.2BestPrecisionIinjectionMoldingProcessParametersSettingsTothebestmoldingprocessparameterstoreduceplasticproducts,theshrinkagerate.Partsofthewallthicknessdifferenceisgenerallyconsideredbythetwofactors.(1)Melthypertensioncausedbymoldcavityminordeformation(2)Whenthemoldcavityflexibilityofthematerialafterexpansion.3PrecisionInjectionMoldingMachineUsedtoReplaceConventionalInjectionMoldingMachinePrecisioninjectionmoldingmachinegenerallylargerinjectionofpower,Besidesmeetinjectionpressureandinjectionrateofrequirements,Powerwillbeinjectingitselfontheaccuracyofacertainroleintheimprovement.3.1TheconsistencyofmoldingcycletimeGeneraltypicalinjectionmoldingmachinewiththreemodesmanual,semiautomaticandfullyautomatic.Duetotheinfluenceofvariousfactors,intheformertwomodelsundereachmoldingcycletimevary,thiswillaffectthemoldtemperatureandmeltmaterialsintheresidencetime,therebyaffectingtheprecisionofthepartsmade,soinPrecisionmoldingshouldmaximizetheuseoffullyautomaticmode14.3.2TheTemperatureControlofPrecisionInjectionMoldingMachine,AndANewDesignofScrew.Injectionbarrelautomaticthermostatonthecycleofsexualrelationsandtheopeningofthestovetomeltdensityandviscositychanges.Productsthusaffectingthequalityandaccuracyofthecyclicalfluctuationsinjectionmoldingmachinenozzleclosetothemoldcavity.Therefore,thenozzletemperatureofmoldingcomponentwillhaveanimportantimpact.4PrecisionMoldingTechnology4.1ApplicationofTheMoldInjectionCompressionMoldingICMTechnologyICMTechnologyisthemeanstoopenacertaindistancefromthemoldundertheconditionsofthebeginninginjection,injectionofacertainamount,closetothebeginningdiecavitymeltimplementationofthecompression,Diecompletelyclosedattheterminationofinjection,andthenpacking,coolinguntiltheremovalproducts.4.2TheHighspeedInjectionMoldingHighspeedinjectionmoldingmethodoffillingmeltsfasterthantraditionalfast10100times,sothatmeltinamoldcavitytoproducehighshearflowandviscosity,moldfillingfast,plasticsurfacehardeningslowed,willbeenhancedthinwallmoldingthicknesslimit,inhibitexcessivemoldingpressureandlowpressuredieasmobile,products,thelowerthestress.4.3NoGuaranteePressureInjectionMoldingWithoutpackinginjectionmoldingtechnologyisreferredtotheplasticmeltinhighspeed,highpressurefillingintothemold,thenclosetothenozzleneedle,aplasticmoldcavitymeltautomaticallycoverallpartsoftheproductcontractionSuchproductscangreatlyreducethewarpage.4.4OtherIntelligentControlTechnologyPrecisioninjectionmoldingprocessontheprocessingconditionsforcontinuedmonitoringandaccuratecontrolisveryimportant.Withthedevelopmentofcomputertechnology,computerizedinjectionmoldinghasbeenwidelyused.5ConclusionThegrowingrequirementofplasticproductsforhighaccuracyandhighperformancerequirementsisthemomentumforsophisticatedinjectionmoldingtechnologyforward.Peopleofprecisioninjectionmoldingunderstandingoftheprincipleisthecontinuousdeepeningofprecisioninjectionmoldingtechnologythebasisforprogress.Withnewmaterials,newtechniquesandnewequipmenthasemerged,particularlyplasticwidelyusedinthecomputerprocessing,tocreategoodconditionsforprecisioninjectiontechnology.Aslongasreasonabletouse,wewillbeabletoproducesophisticatedproducts.
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