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外文翻译--注射模具的介绍.doc

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外文翻译--注射模具的介绍.doc

1毕业设计论文外文资料翻译系别机电信息系专业机械设计制造及其自动化班级姓名学号附件1.原文2.译文2013年03月2TheintrodutionoftheInjectionMold1.Moldbasicknowledge1.1IntroductionThereisacloserelationshipwithallkindsofmold,whicharereferedtoourdailyproduction,andlifeintheuseofthevarioustoolsandproducts,thelargebaseofthemachinetool,thebodyshell,thefirstembryotoasmallscrews,buttons,aswellasvarioushomeappliancesshell.Moldsshapedeterminetheshapeoftheseproducts,moldsprecisionandmachiningqualitydeterminethequalityoftheseproducts,too.Becauseofavarietyofproducts,appearance,specificationsandthedifferentuses,molddevideintoDieCastingintothemould,dieforging,diecastingmould,Die,andsoonothernonplasticmolds,aswellasplasticmold.Inrecentyears,withtherapiddevelopmentoftheplasticsindustry,andGMandengineeringplasticsinareassuchasstrengthandaccuracyofthecontinuousenhancement,thescopeoftheapplicationofplasticproductshavealsoconstantlyexpanded,suchashouseholdappliances,instrumentation,constructionequipment,automotive,dailyhardware,andmanyotherfields,theproportionofplasticproductsisrapidlyincreasing.Arationaldesignofplasticpartsoftencanreplacemuchmoretraditionalmetalpieces.Thetrendofindustrialproductsanddailyproductsplasticedisrisingdayafterday.1.2MoldgeneraldefinitionIntheindustrialproduction,withthevariouspressandthespecialinstrumentswhichinstalledinthepress,itproducestherequiredshapepartsorproductsthroughpressureonthemetalornonmetallicmaterials,thisspecialinstrumentscollectivelycallasthemold.1.3MoldgeneralclassificationMoldcanbedividedintoplasticandnonplasticmould1NonplasticmouldDieCasting,forgingDie,Die,diecastingmouldandsoon.A.DieCastingtaps,pigironplatformB.ForgingDiecarbodyC.DiecomputerpanelD.DieCastingDiesuperalloy,cylinderbody2Fortheproductiontechnologyandproduction,theplasticmoldaredividedintodifferentproductsA.InjectionmoldingdieTVcasing,keyboardbuttonthemostcommonapplicationB.InflatablemoduledrinkbottlesC.Compressionmoldingdiebakeliteswitches,scientificCiwandishD.TransfermoldingdieICproductsE.Extrusiondieofglue,plasticbagsF.HotformingdietransparentshellmoldingpackagingG.RotomouldingmodeFlexibletoydoll.InjectionMoldingisthemostpopurlarmethodinplasticsproducingprocess.Themethodcanbeappliedtoallpartsofthermoplasticandsomeofthermosettingplastics,thequantityofplasticproductionismuchmorethananyother3formingmethod.Injectionmoldasoneofthemaintoolsofinjectionmoldingprocessing,whoshproductionefficiencyisloworhighinthequalityofprecision、manufacturingcycleandtheprocessofinjectionmoldingandsoon,directlyaffectthequalityofproducts,production,costandproductupdates,atthesametimeitalsodeterminesthecompetitivenessofenterprisesinthemarketsresponsecapacityandspeed.InjectionMoldconsistsofanumberofplatewhichmasswiththevariouscomponentparts.ItdividedintoAmoldingdeviceDie,punchBpositioningsystemI.columnI.setsCfixturesthewordboard,codepitDcoolingsystemcarryingwaterholeEthermostatsystemheatingtubes,thehotlineFRoadSystemjackTsuihole,flowslot,streamingRoadHoleGejectionsystemDingzhen,topstick.1.4TypeofmoldItcanbedividedintothreecategoriesaccordingtogatingsystemwiththedifferenttypeofmold1intakedieRunnerandgateatthepartigline,itwillstriptogetherwithproductswhenintheopenmode,itisthemostsimpleofdesign,easyprocessingandlowercosting.Somorepeopleoperationsbyusinglargeintakesystem.2smallinletdieItgeneralstayintheproductsdirectly,butrunnerandgatearenotatthepartigline.Therefore,itshouldbedesignamultioutletpartingline.Andthenitismorecomplexinthedesigning,moredifficultinprocessing,generallychosingthesmallinletdieisdependingontheproductsrequirements.3hotrunnerdieItconsistsofheatgate,heatrunnerplate,temperaturecontrolbox.Hotrunnermoldsaretwoplatemoldswithaheatedrunnersysteminsideonehalfofthemold.Ahotrunnersystemisdividedintotwopartsthemanifoldandthedrops.Themanifoldhaschannelsthatconveytheplasticonasingleplane,paralleltothepartingline,toapointabovethecavity.Thedrops,situatedperpendiculartothemanifold,conveytheplasticfromthemanifoldtothepart.Theadvantagesofhotrunnersystem1Nooutletexpected,noneedprocessing,thewholeprocessfullyautomated,savetimeandenhancetheefficiencyofthework.2smallpressureloss.2、InjectionMoldTherearemanyrulesfordesigningmolds.Theserulesandstandardpracticesarebasedonlogic,pastexperience,convenience,andeconomy.Fordesigning,moldmaking,andmolding,itisusuallyofadvantagetofollowtherules.Butoccasionally,itmayworkoutbetterifaruleisignoredandanalternativewayisselected.Insometexts,themostcommonrulesarenoted,butthedesignerwilllearnonlyfromexperiencewhichwaytogo.Thedesignermusteverbeopentonewideasandmethods,tonewmoldingandmoldmaterialthatmayaffecttheserules.Theprocessconsistsoffeedingaplasticcompoundinpowderedorgranularform4fromahopperthroughmeteringandmeltingstagesandtheninjectingitintoamold.InjectionmoldingprocessMoldisaproductionofplastictool.Itconsistsofseveralpartsandthisgroupcontainsformingcavities.Whenitinjectsmolding,moldclampingintheinjectionmoldingmachine,meltingplasticisInjectedformingcavitiesandcoolingstereotypesinit,thenitseparateupperandlowerdie,itwillpushtheproductionfromthecavityinordertoleavethemoldthroughejectionsystem,finallymoldcloseagainandpreparedthenextinjection.Theentireprocessofinjectioniscarriedoutofthecycle.Aninjectionmoldconsistsofatleasttwohalvesthatarefastenedtothetwoplatensoftheinjectionmoldingmachinesothatcanbeopenedandclosed.Intheclosedposition,theproductformingsurfacesofthetwomoldhalvesdefinethemoldcavityintowhichtheplasticmeltisinjectedviatherunnersystemandthegate.Coolingprovisionsinthemoldprovideforcoolingandsolidificationofthemoldedproductsothatitcanbesubsequentlyejected.Forproductejectiontooccur,themoldmustopen.Theshapeofthemoldedproductdetermineswhetheritcanbeejectedsimplybyopeningthetwomoldhalvesorwhetherundercutsmustbepresent.Thedesignofamoldisdictatedprimarilybytheshapeoftheproducttobemoldedandtheprovisionsnecessaryforproductejection.Injectionmoldedproductscanbeclassifiedas1.Productswithoutundercuts.2.productswithexternalundercutsoflateralopenings.3.productswithinternalundercuts.4.productswithexternalandinternalundercuts.3.Thecompositionofinjectionmold3.1MoldCavitySpaceThemoldcavityspaceisashapeinsidethemold,whenthemoldingmaterialisforcedintothisspaceitwilltakeontheshapeofthecavityspace.Ininjectionmoldingtheplasticisinjectedintothecavityspacewithhighpressure,sothemoldmustbestrongenoughtoresisttheinjectionpressurewithoutdeforming.3.2NumberofCavitiesManymolds,particularlymoldsforlargerproducts,atebuiltforonly1cavityspace,butmanymolds,especiallylargeproductionmolds,arebuiltwith2ormorecavities.Thereasonforthisispurelyeconomical.Ittakesonlylittlemoretimetoinjectseveralcavitiesthantoinjectone.Today,mostmulticavitymoldsarebuiltwithapreferrednumberofcavities2,4,6,8,12,16,24,32,48,64,96,128.Thesenumbersareselectedbecausethecavitiescanbeeasilyarrangedinarectangularpattern,whichiseasierfordesigninganddimensioning,for

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