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JOURNALOFZHEJIANGUNIVERSITYSCIENCEAISSN1673565XPRINT；ISSN18621775ONLINEWWWZJUEDUCN／JZUS；WWWSPRINGERLINK．COMEMAILJZUSZJUEDUCALFEFAL／JZHEJIANGUNIVSCIA20078710771083SINGLEGATEOPTIMIZATIONFORPLASTICINJECTIONMOLDLIJIQUAN十，LIDEQUN，GUOZHIYING，LVHAIYUANDEPARTMENTOFPLASTICITYTECHNOLOGY,SHANGHAIJIAOTONGUNIVERSITY，SHANGHAI200030,CHINAEMAILHUTLI163．CORNRECEIVEDNOV．22，2006；REVISIONACCEPTEDMAR．19，20071077ABSTRACTTHISPAPERDEALSWITHAMETHODOLOGYFORSINGLEGATELOCATIONOPTIMIZATIONFORPLASTICINJECTIONMOLD．THEOBJECTIVEOFTHEGATEOPTIMIZATIONISTOMINIMIZETHEWARPAGEOFINJECTIONMOLDEDPARTS，BECAUSEWARPAGEISACRUCIALQUALITYISSUEFORMOSTINJECTIONMOLDEDPARTSWHILEITISINFLUENCEDGREATLYBYTHEGATELOCATION．FEATUREWARPAGEISDEFINEDASTHERATIOOFMAXIMUMDISPLACEMENTONTHEFEATURESURFACETOTHEPROJECTEDLENGTHOFTHEFEATURESURFACETODESCRIBEPARTWARPAGE．THEOPTIMIZATIONISCOMBINEDWITHTHENUMERICALSIMULATIONTECHNOLOGYTOFINDTHEOPTIMALGATELOCATION，INWHICHTHESIMULATEDANNEALINGALGORITHMISUSEDTOSEARCHFORTHEOPTIMUM．FINALLY，ANEXAMPLEISDISCUSSEDINTHEPAPERANDITCANBECONCLUDEDTHATTHEPROPOSEDMETHODISEFFECTIVEKEYWORDSINJECTIONMOLD，GATELOCATION，OPTIMIZATION，FEATUREWARPAGEDOI10．1631／JZUS．2007．A1077DOCUMENTCODEACLCNUMBERTQ320．66INTRODUCTIONPLASTICINJECTIONMOLDINGISAWIDELYUSED．COMPLEXBUTHIGHLYEFFICIENTTECHNIQUEFORPRODUCINGALARGEVARIETYOFPLASTICPRODUCTS，PARTICULARLYTHOSEWITHHIGHPRODUCTIONREQUIREMENT，TIGHTTOLERANCE，ANDCOMPLEXSHAPES．THEQUALITYOFINJECTIONMOLDEDPARTSISAFUNCTIONOFPLASTICMATERIAL，PARTGEOMETRY，MOLDSTRUCTUREANDPROCESSCONDITIONS．THEMOSTIMPORTANTPARTOFANINJECTIONMOLDBASICALLYISTHEFOLLOWINGTHREESETSOFCOMPONENTSCAVITIES，GATESANDRUNNERS，ANDCOOLINGSYSTEM．LAMANDSEOW2000ANDJINANDLAIN2002ACHIEVEDCAVITYBALANCINGBYVARYINGTHEWALLTHICKNESSOFTHEPART．ABALANCEFILLINGPROCESSWITHINTHECAVITYGIVESANEVENLYDISTRIBUTEDPRESSUREANDTEMPERATUREWHICHCANDRASTICALLYREDUCETHEWARPAGEOFTHEPART．BUTTHECAVITYBALANCINGISONLYONEOFTHEIMPORTANTINFLUENCINGFACTORSOFPARTQUALITIES．ESPECIALLY。THEPARTHASITSFUNCTIONALREQUIREMENTS．ANDITSTHICKNESSESSHOULDNOTBEVARIEDUSUALLY．PROJECTNO．50675080SUPPORTEDBYTHENATIONALNATURALSCIENCEFOUNDATIONOFCHINAFROMTHEPOINTVIEWOFTHEINJECTIONMOLDDESIGN，AGATEISCHARACTERIZEDBYITSSIZEANDLOCATION．ANDTHERUNNERSYSTEMBYTHESIZEANDLAYOUT．THEGATESIZEANDRUILLLERLAYOUTAREUSUALLYDETERMINEDASCONSTANTS．RELATIVELY，GATELOCATIONSANDRUNNERSIZESAREMOREFLEXIBLEWHICHCANBEVARIEDTOINFLUENCETHEQUALITYOFTHEPART．ASARESULT，THEYAREOFTENTHEDESIGNPARAMETERSFOROPTIMIZATION．LEEANDKIMRL996AOPTIMIZEDTHESIZESOFRUNNERSANDGATESTOBALANCERUNNERSYSTEMFORMULTIPLEINJECTIONCAVITIES．THERUNNERBALANCINGWASDESCRIBEDASTHEDIFFERENCESOFENTRANCEPRESSURESFORAMULTICAVITYMOLDWITHIDENTICALCAVITIES．ANDASDIFFERENCESOFPRESSURESATTHEENDOFTHEMELTFLOWPATHINEACHCAVITYFORAFAMILYMOLDWIMDIFFERENTCAVITYVOLUMESANDGEOMETRIES．THEMETHODOLOGYHASSHOWNUNIFORMPRESSUREDISTRIBUTIONSAMONGTHECAVITIESDURINGTHEENTIREMOLDINGCYCLEOFMULTIPLECAVITIESMOLD．ZHAIETA1．2005A1PRESENTEDTHETWOGATELOCATIONOPTIMIZATIONOFONEMOLDINGCAVITYBYANEF前一CIENTSEARCHMETHODBASEDONPRESSUREGRADIENTPGSS，ANDSUBSEQUENTLYPOSITIONEDWELDLINESTOTHEDESIREDLOCATIONSBYVARYINGRUNNERSIZESFOR维普资讯HTTP//WWWCQVIPCOM1078L，EA1．／DZHEJIANGUNIVSCIA20078710771083MULTIGATEPARTSZHAIETA1．，2006．ASLARGEVOLUMEPART，MULTIPLEGATESARENEEDEDTOSHORTENTHEMAXI．MUMFLOWPATH，WITHACORRESPONDINGDECREASEININJECTIONPRESSURE．THEMETHODISPROMISINGFORDE．SIGNOFGATESANDRUNNERSFORASINGLECAVITYWICHMULTIPLEGATES．MANYOFINJECTIONMOLDEDPARTSAREPRODUCEDWITHONEGATE．WHETHERINSINGLECAVITYMOLDORINMULTIPLECAVITIESMOLD．THEREFORE．THEGATELOCATIONOFASINGLEGATEISTHEMOSTCOMMONDESIGNPARAMETERFOROPTIMIZATION．ASHAPEANALYSISAPPROACHWASPRESENTEDBYCOHRBEBAISSEANDGARCIA2002，BYWHICHTHEBESTGATELOCATIONOFINIECTIONMOLDINGWASESTI．MATED．SUBSEQUENTLY，THEYDEVELOPEDTHISMETHODO1．OGYFURTHERANDAPPLIEDITTOSINGLEGATELOCATIONOPTIMIZATIONOFANLSHAPEEXAMPLECOURBEBAISSE，2005．ITISEASYTOUSEANDNOTTIME．CONSUMING．WHILEITONLYSERVESTHETURNINGOFSIMPLEFLATPARTSWICHUNIFORII1THICKNESS．PANDELIDISANDZOUR1990PRESENTEDTHEOPTI．MIZATIONOFGATELOCATION．BYINDIRECTQUALITYMEASURESRELEVANTTOWARPAGEANDMATERIALDEGRADATION．WHICHISREPRESENTEDASWEIGHTEDSUMOFATEMPERATUREDIFFERENTIALTERM．ANOVER．PACKTERM．ANDAFRICTIONALOVERHEATINGTERM．WARPAGEISINFLUENCEDBYTHEABOVEFACTORS．BUTTHERELATIONSHIPBETWEENTHEMISNOTCLEAR．THEREFORE，THEOPTIMIZATIONEFFECTISRESTRICTEDBYTHEDETERMINATIONOFTHEWEIGHTINGFACTORS．LEEANDKIMRL996BDEVELOPEDANAUTOMATEDSELECTIONMETHODOFGATELOCATION，INWHICHASETOFINITIALGATELOCATIONSWEREPROPOSEDBYADESIGNERANDTHENTHEOPTIMALGATEWASLOCATEDBYTHEAACENTNODEEVALUATIONMETHOD．THECONCLUSIONTOAGREATEXTENTDEPENDSMUCHONTHEHUMANDESIGNER’SINTUITION．BECAUSETHEFIRSTSTEPOFTHEMETHODISBASEDONTHEDESIGNER’SPROPOSITION．SOTHERESULTISTOALARGEEX．TENTLIMITEDTOTHEDESIGNER’SEXPERIENCE．LAMANDJIN200L、DEVELOPEDAGATELOCATIONOPTIMIZATIONMETHODBASEDONTHEMINIMIZATIONOFTHESTANDARDDEVIATIONOFFLOWPATHLENGTHSDLANDSTANDARDDEVIATIONOFFILLINGTIMESDTDURINGTHEMOLDINGFILLINGPROCESS．SUBSEQUENTLY，SHENET口，．004A；2004BOPTIMIZEDTHEGATELOCATIONDESIGNBYMINIMIZINGTHEWEIGHTEDSUMOFFILLINGPRESSURE，FILLINGTIMEDIFFERENCEBETWEENDIFFERENTFLOWPATHS，TEMPERATUREDIFFERENCE，ANDOVERPACKP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
