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CHINESEJOURNALOFMECHANICALENGINEERFGVOL18,NO4,2005609YUTONGMINLIGUANHUADESIGNTECHNOLOGYFORINJECT10NMOLDRARTINGSURFACEBASEDONCASESANDKNOWLEDGELIYBUMINABSTRACTONTHEBASISOFTHEEOMPREHENSIVEANALYSISABOUTTHEAUTOMATIEGENERATIONOFTHEINJEETLANJIANKEYLARATORYFORPDSIONANDNONTRADITIONALMAEHININGFEHNOLOGYOFMINIATRYOFEDUCAUON,DNUNIVETYOFTECHNOLOGDALIAN116024,CHINALONMO,DPARTMAJCE,THEPARTINGSURFACEMATHODWHIHADUCE5AOWLEDCSEBASEDREASONMGCBRMTOTHECOMPTERALAEADESLGN15AESCNDEOOYEOMOLNMGWITNTNCACUA,EHARAETERISTIEININJEETIONMOLDDESIGN,ANDTHEDESIGNPROEESSOFEASEBBASEDREASONINGMETHOD15ALSOGIVENAEASELIBRARYINELUDINGTHEINTORMATLONORPARTLNGSURJAEEB5OUBRWBTNTNEMAEXORMAINSHAPEFEATESTHEAUTOMATIEDESIGNOFTHEMO1DPARTINGSURFACEISREALIZEDEOMBINEDWITHTHEFORARDBREASONINGMETHODANDTHE517LARITY50UTIONPROEEDURETHERULEKNOWLELELIBRARY15ALSOIMPROVEDKEYWORDSINJEETIONMOLDPAINTINGSURICEDESIGNCASEBBASEDREASONINGCBRSIMILTYSOLUTION0INTRODUCTIONBEINGONEOFTHEIMPORTANTSTEPSININJECTIONTHEEHOIEEOFPARTINGSURFAEEHASANDIREETLYEFEETMOLDDESIGN,ONTHEGENERALFRAMEDESIMOLDMAKINZEOST,THEPINSURFAEEMAEHININGANDTHEQUALLTYOTTNETLNALPLASNCPARTSMBMCBOTNERATLONALEHOOSINGOFTHEPARTINGSURFAEE15THEPREEONDITIONOFASUEEESSFULINJEETIONMOLDDESIGNANDTHEBASISOFREALIZINGINJEETIONMOLDINGPARTANTOMATIEANDSOPHISTIEATEDDESIGNINREEENTYEARS,RESEAREHWORKONTHEPARTINGSURFAEEANDMOLDEOMPONENTSAUTOMATIEALLYGENERATION15ONEOFTHEHOTSPOTSANDDIFIEULTIESINTHEINJEETIONMOLDINGCADFIELD,ANDMANYRESEAFCHERSAROUNDTHEWORLDHAVEDONEREMARKABLEWORKSABOUT1FRAMEVVORKOFKNOWLEDGEANDCASEBASEDREASONINGPARTINGSURFACEAUTOMATICDESIGNTHISISSUEBUTTHOSEPRIORWORKSTENDTOESHAPEANDITSPOSITIONRELATIONSOFPRTINGSXPRCSURFACSSEONSTRUETINGSOMEBUMERICALMODELSBASEDONTHEGEOMETRYALLBAROUNDBYTHEESSENTIALANALYSISOFTHEPLASTIEPARTN5SHAPESTRUETUREEOMPLEXITYOFPLASTICPKINDSOFSHORTCOMINGSINPRACTICEC2B5DUETOTHEDIVERSITYANDTSTHOSEMETHODSH8VESOMEWITHMUEHEXPERIENEEANDLITLETHEORYFORMOLDINGDESIGN,THEPARTINGSURFACEDESIGNMETHODWHIEHINTRODUEESKNOWLEDGEANDEASEBBASEDREASONINGCBRINTOTHEEOMPUTERBAIDEDDESIGN15PRESENTEDBYEOMBININGWITHTHEDESIGNPROEESSOFINJEETIONMOLDINGDESIGN,50THATTHEMOLDINGPARTSEANBEGENERATEDAUTOMATIEALLYKNOWLEDGEANDCASEBBASEDREASONINGMEANSPLYING517IARITYJUDGLNENTPROEEDUREANDANALOGISMTOHANDLEANEWDESIGNTASKBYEONSTRUETINGKNOWLEDGELIBRARYANDEASELIBRARYANDRESPECTIVEREASONINGRULEONTHEBASISOFEOMBTHEKNOWLEDGEDRULEOFPARTINGSURFACEDESISUEEESSFULENGLNEERSPRINEIPLESUEEESSFULAPPROACHDESIZSOPDTHSUCCE,OXPENENCTORGAN1CALLYMB,TNLSMENEWQESLGNNOTONLYDOFTFITSOFMOLDPARTINGSURFAEEBUTALSOINELUDESTHEEXPERIENEEOFTHOSEFONNEREASESASARESULT,THIS15MOREEONVENIENT,QUIEKANDPRAETIEALEFEETIVECOMPAREDTOANALYSISANDSOLVINGTHEPARTINGSURFACEDESIGNBYCONSTRUETINGNUMERIEALMODELFURNTHERMORETHEDESERIPTIONOFPARTINGSURFAEEDESIGNEXPERIENEESAREEASILYEXPRESSEDBYTHECASESRATHERTHANTHEABSTRAETDESIGNRULESANDEXPRESSIONS50THEKNOWLEDGEANDEASEBBASEDREASONINGPARTINGSURFAEEDESIGNMETHOD15VERYSUITABLEFORMOLDENGINEERN5THOUGHTFASHIONAND118LNERREEEIVEDMAY26,2004RECEIVEDINREVISEDFORMAUGUST17,2005AEEEPTEDAUGUST30,2005THEGENERALIDEAOFKNOWLEDGEANDCASEBBASEDREASONINGPALTINGSURFAEEDESIGN15TOFOUNDAEASELIBRARYUSINGSUCEESSFULPARTLNGSURFACEDESIGNSINTERMOFMOLDEDPARTSNTYPESANDGEOMETRIECHARAETERTHEMAINSHAPEFEALIRESOFMOLDEDPAREINDEXESOFTHISLIBRARYAFTERSEARCHINGTHESIMILAREASEWITHTHEPART,SMAINSHAPEFEATUREFROMTHEEASELIBRARY,THEPARTINGSURIEECANBEGENERATEDBYJUDGINGFROMTHESIMILARITYPRINEIPLEANDTHEGIVENREASONINGSTRATEGYATTHESAMETIME,THEEORRELATIVEKNOWLEEANDPRINEIPLESOFPARTINGSURFAEEDESIGNANDTHEDESIGNERN5EXPERIENEESEANBESUNNNARIZEDINTOKNOWLEDGELIBRAJ,WHIEHEANBEQUERIEDANDCONSULTEDBYDESIGNERSASTHEASSISTANTINFORMATIONOFPARTINGSUEEDESIGNTHEEASEEOMPONENTOFTHEMETHOD15USEDFORTHEREASONINGDESIGN,WHILETHEKNOWLEDGEONEFORTHEGUIDANEEOFDESIGNERN5RATIONALSELEETIONOFPARTINGSURICE,THEKNOWLEDGEANDCASEBBASEDREASONINGPARTINGSURFAEEDESIMAINLYEONSISTSOFTHEFOLLOWINGCONSTRUETINGKNOWLEDGELIBR/AI7NGATTHEPRACTICEOFINJEETIONMOLDINGDESIGN,AKNOWLEDGELIBRARYOFPARTINGSURIEEDESIGNRULES15FOUNDEDTHROUGHEONELUDINGANDINTEGRATINGTHERELATEDOWLEDGEANDRULESOFPARTINGSURFAEEDESIGNANDTHEDESIGNERSNEXPERIENEESCONSTRUETINGEASELIBRARYOFPARTINGSURFACEPOSITIONAEASELIBRARYOFPARNTINGSURFAEEPOSITION15EONSTRUETEDBASEDONTHETYPESOFMOLDEDPARTSANDTHEPREVIOUSSUCEESS7DESIGNEASES,WHIEHEONSISTSOFTHEDESERIPTIONOFEASESANDTHESTRUETUREOFCASELIBRARY,THEKEYOFDESERIBINGTHEPOSITIONOFPINGSURFACE15TOSORTANDORGANIZETHESHAPEFEATURESOFCASEMODELSANDDETERNUNETHEEORESPONDLNGPOSITONOFPNGSURFACEACEORDINGTOTHEVARIANTSHEOFMOLDEDPARTSBEEAUSETHEPARTINGSURFAEEPOSITION15MAINLYDETENNINEDBYTHEPART,5SHAPEFEALRE,THEORGANIZATIONOFEASELIBRARYSHOULDBEPROPITIOUSTOTHEEASESEARCHINGINDESINROEESSXDENTIFIEATIONOFMOLDEDPARTNSSHAPEFEATURETHESHAPEFEATURESOFORIGINALPARTSHOULDBEIDENTIFIEDBEFOREDETENININGTHEPOSITIONOFPARTINGSURFAEETHEREFORE,THEMAINSHAPEFEATESINDEXNEEDTOBEFOUNDEDAIMINGATTHETYPEOFMOLDEDPARTSTRUETURETHUSTHESEATNLESSJOINTBETWEENMODELINGMELDEDPARTANDDESIGNMODULEOFMOLDPBNGFACEOANBEREALIZEDASARESULT,THEHERITEDCHARACTERISTIEOFSYSTEM15ALSOIMPROVEDSYSTEMREASONINGANDSEAREHINGMODELSEAREHINGANDMATEHINGTHESIMILARSHAPE610TTTTITECHNOLOFO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