机械设计制造及其自动化专业外文翻译原文

桂林电子科技大学毕业设计（论文）报告用纸1编号：毕业设计(论文)外文翻译（原文）院（系）：机电工程学院专业：机械设计制造及其自动化TheInjectionMoldingThepresentsituationthatthemouldmakesatpresentandtrendThemoldisatthecoreofaplasticmanufacturingprocessbecauseitscavitygivesapartitsshape.Thismakesthemoldatleastascritical-andmanycasesmoreso-forthequalityoftheendproductas,forexample,theplasticitingunitorothercomponentsoftheprocessingequipment.Themouldisimportanthandicraftequipment，occupiesdecisivepositioninindustriddepartmentssuchasconsumergoods，electricalequipmentelectron，automobile,aircraftfabrication.Themouldisimportanthandicraftequipment,occupiesdecisivepositioninindustriddepartmentssuchasconsumergoods，electricalequipmentelectron，automobile,aircraftfabrication.Industrialproductpartroughprocess75%,thefinishmachining50%andplasticpart90%willbecompletedfromthemould.TheChinesemouldmarketdemandalreadyreachesscaleof500hundredmillionyuanatpresent.Theautomobilemould,theannualgrowthratecoveringpieceofmouldespeciallywillexceed20%;Alsopromptbuildingmaterialmoulddevelopment，variousheterotypematerialthemould，wallsurfaceandfloormouldbecomenewmouldgrowthpoint,plasticdoorsandwindowsandplasticdrain-pipeincreasetoexceeding30byintheupcomingseveralyears%;Thehomeappliancemouldannualgrowthratewillexceed10%;TheITindustryyearincreases%speedequallyexceeding20，theneedtothemouldaccountsfor20ofmouldmarketplace%.2004annualChinesemachinetoolsimplementsindustryoutputvalue.Willcontinuetoincrease.Ourcountrymouldfabricationmarketpotentialisenormous.Thebasisdatacounts，inrecentyears，ourcountrymouldyeargrossoutputvaluereaches3billionU.S.dollar，entranceexceeds1billionU.S.dollar，exceed100millionU.S.dollaroutlet.Increasebyfrom25%toincreaseto200550%of1995.Theexpertforetellsthatabroad:Asiaportionbeingoccupiedbyinmouldfabricationinthewholeworld,willfrom25%toincreaseto200550%of1995.Chinesemouldindustryhasbeenexpandingbyleapsandbounds，hasformedeastChinaandtwobigSouthChinabases,andhasexpandedgraduallyarrivingatotherprovince.In2002(Shandong，Anhui，Sichuan)in1996，mouldmanufacturingindustryoutputvalueannualaveragegrowth14%,growsby25%in2003.In2003ourcountrymouldoutputvalueis45billionRMB.Thegrossproductplaceoccupiestheworldthe3rd，exportsamouldincreases33.5%comparedtolastyear336,800,000U.S.dollar.But,contentslowourcountrytechnologymouldsalreadypileupinexcessofrequirement，verymostsupportofaccurate，complicatedtopgrademouldimports.Everyyeartheentrancemouldexceeds1billionU.S.dollar.Exceed100millionU.S.dollaroutlet.Precisemouldaccuracyrequiresthat3mums，large-scalemouldsrequirethat8000satisfiedkNagreewellwithmodelforceinjectionmachinerequestin2~；Theminitypemouldneedstherequestsatisfyingthediameter1mmsilentstocktube.Atpresent,adoptquick-cuttingtoproduceamouldalreadybecomingthegeneraltrendthatthemouldmakes,afewmouldshaveproducedamanufacturerinabroad，high-speedmachinetoollargeareahassubstitutedtheelectricsparkmachinetool，quick-cuttinghasimprovedthemouldefficacygreatly.Machinetoolenterpriseaimsatmouldmanufacturingenterprises，sometreatingcentres60%allaboveofthemachinetoolproducingafactorysellstreatingenterprisetoamould.Themouldfabricationenterprisesubstitutingtheelectricsparkfinishmachiningmouldgraduallyinabroadhasadoptquick-cuttingalreadycommonly,quick-cuttinghasproducedamouldalreadybecomingthegeneraltrendthatthemouldmakesgradually，hasimprovedthemouldefficacyandmassgreatly.Adoptquick-cuttingtoreplaceelectricsparkproducingamould,cangetonthestickobviously,improvesmouldaccuracy，lifetimegrowing.1.TheIntroductionofInjectionMoulds.Plastic,whichisoneofthemostversatileinthemodernage,iswidelyusedinmanyproductsthroughouttheworld.Duetoitsabilitytoproducecomplex-shapeplasticpartswithgooddimensionalaccuracyandveryshortcycletimes,injectionmouldinghasbecomethemostimportantprocessformanufacturingplasticpartsintheplasticindustrytoday.However,thecurrentplasticsindustryisundergreatpressure,duetotheglobalizationofthemarket,theshortlifecycleofproductdevelopment,increasingproductdiversity,highdemandofproductquality.Tomeetsuchrequirements,itisveryimportantforthistradetoadoptvariousadvancedtechnologieswhichincludeinformationandInternettechnology,CAD/CAE/CAMintegrationtechnology,concurrentengineering,artificialintelligence,andsoon,toeffectivelyaidthedevelopmentofinjection-mouldedproduct.Ininjectionmoulding,thedesignofamouldisofcriticalimportanceforproductqualityandefficientprocessing.Inmostcases,qualityofmouldisresponsiblefortheeconomicsoftheentireprocess.Injectionmoulddesigninvolvesextensiveempiricalknowledge(heuristicknowledge)aboutthestructureandfunctionsofthecomponentsofthemould.Nowadays,moulddesignfaceswithincreasingdeadlinepressuresandthedesignitselfispredominantlybaseduponexperienceofthemoulddesigner.Moulddesignersarerequiredtopossessthoroughandbroadexperience,becausedetaileddecisionsrequiretheknowledgeoftheinteractionamongvariousparameters.Unfortunately,itispresentlyimpossibletocoverthegrowingdemandforsuchexperienceddesigners.Therefore,intelligentCADtoolsthatcanassistinthevarioustasksofthemoulddesignprocessareveryimportanttotheproductivityofthemould-ma