注塑模具外文翻译原文.docx

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注塑模具外文翻译原文

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

学生姓名：

莫飞

学号：

0801120436

姓名：

吕汝金

职称：

讲师

2012年5月15日

TheInjectionMolding

Thepresentsituationthatthemouldmakesatpresentandtrend

Themoldisatthecoreofaplasticmanufacturingprocessbecauseitscavitygivesapartitsshape.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-makingindustry.

ThegrowingtrendinglobalmanufacturingistoalargeextentsupportedbyInternet,informationtechnologiesandglobalmarketing.Nowadays,itiscommontoseethatdesign,manufacturingandfinalassemblyofaproductaremadeincompanieslocatedindifferentpartsoftheworld.Thevariouspartiesconcernedwouldneedtosharetheirexpertiseandexperiencesduringtheproductdevelopmentprocess.ThecurrentprogressofInternetandinformationtechnologiescanprovideasolutiontosupportandfacilitatecollaborativeproductdevelopmentsamongdifferentgeographicallydistributedenterprises.DevelopinganInternet-basedintelligentmoulddesignsystemasoneofthemoduleofacollaborativeproductdevelopmentsystemcanprovideaneffectiveandfeasibletooltoaidthecollaborativedevelopmentofinjectionmouldsinthesmall-andmedium-sizedenterprisestosatisfythestringentrequirementsofnowadayscompetitiveglobalmarket.

ThispaperpresentsanInternet-basedintelligentmoulddesignsystemusingInternettechnologyandknowledge-basedapproach.Thesystemcanshortenthedesigncycleofinjectionmouldandcaneffectivelyaidthedesignanddevelopmentworksofinjectionmouldsinthesmall-andmedium-sizedenterprisestomeettheincreasingpressureofthecurrentcompetitiveworldmarket.Therestofthepaperisorganizedasfollows.Section2givesabriefintroductionofinjectionmoulddesign.Section3introducesearlierresearchworksonmoulddesignandrelatedfields.ThearchitectureoftheInternet-basedmoulddesignsystemispresentedinsection4.Theknowledge-basedpartofthemoulddesignsystemisdescribedinsection5.Section6discussesthedevelopmentofthesystem.

2.Injectionmoulddesign

Thebasicfeaturesofaninjectionmouldconsistofcavitynumberandlayout,feedsystem,coolingsystem,ejectionsystemandmouldconstruction.

2.1.Designrules

Therearemanyrulesfordesigningmolds.Theserulesandstandardpracticesarebasedonlogic,pastexperience,convenience,andeconomy.Fordesigning,moldmaking,andmolding,itisusuallyofadvantagetofollowtherules.Butoccasionally,itmayworkoutbetterifaruleisignoredandanalternativewayisselected.Inthistext,themostcommonrulesarenoted,butthedesignerwilllearnonlyfromexperiencewhichwaytogo.Thedesignermusteverbeopentonewideasandmethods,tonewmoldingandmoldmaterialsthatmayaffecttheserules.

Amoulddesignprojectnormallystartswitheconomicconsiderations,namelythequestionofhowmanypartscanandshouldbeproducedinonemouldinoneshotinordertomeetthedeliverydateandotherrequirements.Thisisfollowbyconsiderationofthearrangementsofthecavitiesinthemouldframe,whichmightdirectlyincludethoughtsontheeaseofejectionandsubsequently,theconnectionbetweenmouldingsandrunnersandpartquality（number,positionandshapeofgates）.Thefeedsystemaccommodatesthemoltenplasticmaterialcomingfromtheinjectionnozzleofthemouldingmachineanddistributesitintoeachcavity.Toremovetheheatfromthemoulding,itisnecessarytoprovidethemouldwithacoolingsystem.Afterthemouldinghassolidifiedandcooleddown,ithastoberemovedfromthemouldbytheejectionsystem.Mouldisnormallyconstructedbystackingseveralmetalplatestoformarigidbody.Ithastohousevariousmouldcomponentsincorrectpositionsfortheproperfunctioningofthemould.Mouldconstructionnormallyinvolvestheselectionofmouldbasesandstandardmouldparts.Forcomplicatedplasticparts,someothermechanismssuchasslides,unscrewingdevice,etc,mightalsobeinvolvedinthewholemouldstructure.

2.2.MoldMaterial

Dependingontheprocessingparametersforthevariousprocessingmethodsaswellasthelengthoftheproductionrun,thenumberoffinishedproductstobeproduced,moldsforplasticsprocessingmustsatisfyagreatv