Single gate optimization for plastic injection mold

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1、万方数据JournalofZhejiangUniversitySCIENCEAISSN1673、565X(Print)；ISSN1862-1775(OnlineWWw．zjueducn，jzus；www．springerlinkCornE-mail：Jzus@zjueducnLfecat／JZhejiangUnivScIA20078(刀,'1077-1083Singlegateoptimizationforplasticinjectionmold+LIJi-quan十，LIDe-qun，GUOZhi·ying，LVHai-yuan(Departm

2、entofPlasticit；Technology,ShanghaiJiaoTongUnivers勘Shanghai200030,China)+E—marl：hutli@163comReceivedNov22，2006；revisionacceptedMar19，20071077Abstract：nIispaperdealswithamethodologyforsinglegatelocationoptimizationforplasticinjecdonmoldTheobjectiveofthegateoptimizationistominim

3、izethewarpageofinjectionmoldedpans，becausewarpageisacrucialqualityissueformostinjecdonmoldedpartswhileitisinfluencedgreatlybythegatelocationFeaturewarpageisdefinedastheratioofmaximumdisplacementonthefeaturesurfacetotheprojectedlengthofthefeaturesurfacetodescribep',trtwmpage．T

4、heoptimizationiscombinedwiththenumericalsimulationtechnologytofindtheoptimalgatelocation，inwhichthesimulatedannealhagalgorithmisusedtosearchfortheoptimumFinally，arlexampleisdiscussedinthepaperanditcanbeconcludedthattheproposedmethodiseffective．Keywords：Injectionmold，Gatelocat

5、ion，Optimization，Featurewarpagedoi：tO163l／jzus2007A1077Documentcode：ACLCnumber：TQ320．66INTRoDUCTIONPlasticiniectionmoldingisawidelyused．tom—plexbuthighlyefficienttechniqueforproducingalargevarietyofplasticproducts，particularlythosewithhighproductionrequirement，tighttolerance，

6、andcomplexshapes．Thequailtyofinjectionmoldedpartsisafunctionofplasticmaterial，partgeometry，moldstructureandprocessconditions．Themostimportantpartofaninjectionmoldbasicallyisthefollowingthreesetsofcomponents：cavities，gatesandrunners，andcoolingsystem．LainandScow(2000)andJinandL

7、am(2002)achievedcavitybalancingbyvaryingthewalltllick-nessofthepartAbalancefillingprocesswithinthecavitygivesanevenlydistributedpressureandtem-peraturewhichcandrasticallyreducethewarpageofthepart．Butthecavitybalancingisonlyoneoftheimportantinfluencingfactorsofpartqualities．Es

8、pe·cially，theparthasitsfunctionalrequirements，anditsthicknessesshoul