基于数值模拟的微注射成型浇注系统优化设计

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1、Abstract(3)Designtherunnersystemwithcurvedrunnerbasedontheaboveresults．Establishthestraightrunnersystemforcomparingwiththefillingresult．Bycomparingthepolymermeltfillingeffectinthesetworunnersystems，wefoundthatthenovelrunnersystemisnotverygoodtoimprove

2、theimbalancedfilling．FromthereasonofimbalancedflowandoptimizethenovelCHIVerunnersystem．Comparedthefillingresultofoptimizedrunnersystemwiththeformerresultagain，wefoundtheoptimizedrunnersystemisgoodtoimproveimbalancedfilling．Thepressuredistributionineac

3、hcavityisidentical．(4)Analyzingtheprocessofpolymermeltflowinoptimizedruunersystembysettinggatingsystemasaresearchobjective，theresultdemonstratethat：thethicknessoflowtemperaturelayerdistributeinmidplaneofoptimizedrunnersystemismoreuniformthanthestraigh

4、trunnersystematthesameinjectionrate．Meltflowsthroughcurvedrunnertosub-runnercomposedoftwoshares，oneisfromtheinnerofpreviousrunnerandtheotherismeltnearwallofpreviousrunner．Becauseofintenseshearoccurredincurvedrunner,weakenthetemperaturedifferenceabouts

5、ub—channelscausedbymeltstream，sothecurvedrunnerimprovethefillingbalance；thedistributionrangeofmelttemperatureonsecondarysub-runnerofcurvedrunnel"issmaller20％thanthecorrespondingstraightrunners，wimtheinjectionrateincreasing,therangebecomessmaller．Analy

6、sisoffillingresultpolymermeltinmulti-cavitiesunderthesetworunnersystems，attheendingoffillingprocess，thepressure—distributionofthefourthcavitiesisimbalanceinthestraightrunnersystem．Inwhichthepressureofthetwocavitiesnearsprueishigherthantheothercavities

7、．Butthefourcavitiesintheoptimizedcurvedrunnersystemhavemorebalancepressure-distribution．Weanalyzedimbalancedfillinginthesetwortlnnersystemswitllthreedifferentmaterials，andfoundtheoptimizedrunnersystemhavegeneralsignificancetoimprovetheimbalancedflowof

8、thesematerials．KeyWords：Micro—injectionmolding，Fillingbalancing，Curvedflow,Numericalsimulation,ShearheatIV目录目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．IAbstract．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．⋯．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．