DVD-ROM上盖的建模和注塑成型工艺对收缩率影响的分析毕业课程设计外文文献翻译、中英文翻译、外文翻译_第1页
DVD-ROM上盖的建模和注塑成型工艺对收缩率影响的分析毕业课程设计外文文献翻译、中英文翻译、外文翻译_第2页
DVD-ROM上盖的建模和注塑成型工艺对收缩率影响的分析毕业课程设计外文文献翻译、中英文翻译、外文翻译_第3页
DVD-ROM上盖的建模和注塑成型工艺对收缩率影响的分析毕业课程设计外文文献翻译、中英文翻译、外文翻译_第4页
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0第0页共7页MODELINGANDANALYSISOFPROCESSPARAMETERSFOREVALUATINGSHRINKAGEPROBLEMSDURINGPLASTICINJECTIONMOLDINGOFADVDROMCOVERPLASTICINJECTIONMOLDINGPLAYSAKEYROLEINTHEPRODUCTIONOFHIGHQUALITYPLASTICPARTSSHRINKAGEISONEOFTHEMOSTSIGNICANTPROBLEMSOFAPLASTICPARTINTERMSOFQUALITYINTHEPLASTICINJECTIONMOLDINGTHISARTICLEFOCUSESONTHESTUDYOFTHEMODELINGANDANALYSISOFTHEEFFECTSOFPROCESSPARAMETERSONTHESHRINKAGEBYEVALUATINGTHEQUALITYOFTHEPLASTICPARTOFADVDROMCOVERMADEWITHACRYLONITRILEBUTADIENESTYRENEABSPOLYMERMATERIALANEFFECTIVEREGRESSIONMODELWASDEVELOPEDTODETERMINETHEMATHEMATICALRELATIONSHIPBETWEENTHEPROCESSPARAMETERSMOLDTEMPERATURE,MELTTEMPERATURE,INJECTIONPRESSURE,INJECTIONTIME,ANDCOOLINGTIMEANDTHEVOLUMETRICSHRINKAGEBYUTILIZINGTHEANALYSISDATAFINITEELEMENTFEANALYSESDESIGNEDBYTAGUCHIL27ORTHOGONALARRAYSWERERUNINTHEMOLDOWSIMULATIONPROGRAMANALYSISOFVARIANCEANOVAWASTHENPERFORMEDTOCHECKTHEADEQUACYOFTHEREGRESSIONMODELANDTODETERMINETHEEFFECTOFTHEPROCESSPARAMETERSONTHESHRINKAGEEXPERIMENTSWERECONDUCTEDTOCONTROLTHEACCURACYOFTHEREGRESSIONMODELWITHTHEFEANALYSESOBTAINEDFROMMOLDOWTHERESULTSSHOWTHATTHEREGRESSIONMODELAGREESVERYWELLWITHTHEFEANALYSESANDTHEEXPERIMENTSFROMTHIS,ITCANBECONCLUDEDTHATTHISSTUDYSUCCEEDEDINMODELINGTHESHRINKAGEPROBLEMINOURAPPLICATIONKEYWORDSPLASTICINJECTIONMOLDING,REGRESSIONMODELINGANDANOVA,SHRINKAGE1、INTRODUCTIONINJECTIONMOLDINGISONEOFTHEMOSTEFCIENTPROCESSESINMASSPRODUCTIONOFMANUFACTUREDPLASTICPARTWITHTHINSHELLFEATURESTHEQUALITYOFTHEPLASTICPARTDEPENDSONTHEMATERIALCHARACTERISTICS,THEMOLDDESIGN,ANDTHEPROCESSPARAMETERS,ONEOFWHICHISMOREIMPORTANTSEVERALSTUDIESFOUNDTHATTHEINJECTIONMOLDINGPROCESSPARAMETERSHAVECRUCIALEFFECTSONTHEQUALITYOFTHEPLASTICPARTSTHEYINVESTIGATEDTHEPROBLEMSOFTHEINJECTIONMOLDINGPARTSUCHASTHESHRINKAGE,WARPAGE,WELDLINE,SINKMARKS,ANDRESIDUALSTRESSGENERATEDBYTHEPROCESSPARAMETERSTHEIRSTUDIESALSOSHOWTHATTHEMOSTIMPORTANTPARAMETERSAFFECTINGTHEQUALITYOFTHEPLASTICPARTSAREPACKINGPRESSURE,MELTTEMPERATURE,ANDMOLTEMPERATUREHOWEVER,THESESTUDIESDIDNOTEXAMINEINSUFCIENTDEPTHTHEEFFECTOFTHEOTHERPROCESSPARAMETERSINCLUDINGINJECTIONTIMEANDCOOLINGTIMEFURTHER,DEMIRERETALHAVECONDUCTEDANEXPERIMENTALRESEARCHTHATEVALUATESTHESHRINKAGEANDTHEWARPAGE1第1页共7页CAUSINGTOTHEPROBLEMSOFTHEPARTQUALITYTHISRESEARCHALSOEXPLAINEDTHATTHESHRINKAGEANDTHEWARPAGEINCREASEDWITHINCREASINGTHEPROCESSTEMPERATURE,DECREASEDWITHINCREASINGTHEINJECTIONPRESSUREINTHISRESEARCH,ALTHOUGHEXPERIMENTALCONDITIONSAREENOUGHTOPROVIDETHEVALUABLERESULTS,THEMAJORINUENTIALPROCESSPARAMETERSCONSISTINGOFTHEINJECTIONTIMEANDTHECOOLINGTIMEARENOTCONSIDEREDINTHEINJECTIONMOLDINGOFTHEPLASTICPARTSASTHINSHELLFEATURES,MANYPUBLISHEDPAPERSHAVEINDICATEDTHATASTATISTICALRELATIONSHIPCANBEBUILTBETWEENTHEPROCESSPARAMETERSANDTHEPROBLEMSASSOCIATEDWITHTHESHRINKAGEANDTHEWARPAGEAFFECTINGTHEQUALITYOFTHEPLASTICPARTSINTHEPRIORSTUDIES,ANUMBEROFEXPERIMENTSWEREPERFORMEDTOMEASURETHEVALUESOFTHESHRINKAGEANDTHEWARPAGEUNDERTHEPROCESSPARAMETERSTHEMATHEMATICALMODELSTODETERMINETHEOPTIMUMPROCESSPARAMETERSWEREDEVELOPEDBYEXPLOITINGTHEMEASUREDVALUESINTHESIMILARMANNER,THEREGRESSIONANALYSISISUTILIZEDTODERIVETHERELATIONSHIPBETWEENTHEPROCESSPARAMETERSANDTHESHRINKAGEBASEDONTHEEXPERIMENTALTHROUGHTHEINJECTIONMOLDINGOFTHINSHELLPLASTICPARTSECONDORDERGENERALIZEDPOLYNOMIALREGRESSIONEQUATIONSWERECREATEDTODERIVETHISMATHEMATICALRELATIONSHIPONTHESHRINKAGEBYTHEMEANSOFTHEPROCESSPARAMETERSFROMTHESE,ITHASALSOBEENFOUNDTHATTHEPROCESSPLAYSSTATISTICALLYAKEYROLEINDETERMININGTHEQUALITYOFTHEPLASTICPARTONTHEOTHERHAND,INTHESTUDIESABOVE,ITISNOTEMPLOYEDANYMOLDINGSIMULATIONTOOLMOLDOWANALYSISFORCOMPARINGTHEEXPERIMENTALRESULTSHOWEVER,THEREAREMANYARTICLESINVESTIGATINGTHESIMULATIONOFTHEPLASTICINJECTIONMOLDINGWHICHAREINUENCEDBYTHEPROCESSPARAMETERSONTHEQUALITYPROBLEMSONEOFTHEMOSTSIGNICANTOFTHESEARTICLESISSUCCESSFULLYAPPLIEDBYCHENETALTHISARTICLEDEALSWITHTHEAPPLICATIONOFCOMPUTERAIDEDENGINEERINGINTEGRATINGWITHSTATISTICALTECHNIQUETOREDUCETHEWARPAGEBASEDONTHEPLASTICINJECTIONPARAMETERSFORTHISPURPOSE,ANUMBEROFMOLDOWANALYSESDEPENDENTONTHETAGUCHIORTHOGONALARRAYS,THEREGRESSIONEQUATIONS,ANDANALYSISOFVARIANCEANOVAHAVEBEENCOUPLEDTOPREDICTTHEWARPAGEATVARIOUSINJECTIONPARAMETERSBUT,THISARTICLEONLYSUMMARIZESTHERESULTSOFTHEWARPAGEWITHOUTTHOSEOFTHESHRINKAGEDURINGTHEPLASTICINJECTIONMOLDINGNEVERTHELESS,ANOTHERARTICLEPERFORMEDBYCHENETALHASEMPLOYEDFORANALYSISANDMODELINGOFEFFECTIVEPARAMETERSONTHESHRINKAGEVARIATIONOFINJECTIONMOLDEDPARTBYEXPLOITINGANUMBEROFMOLDOWANALYSESINCONTRASTTOTHEMENTIONEDINVESTIGATIONS,ADIFFERENTSTUDY2第2页共7页WASEXECUTEDBYALTANTOREDUCETHESHRINKAGEININJECTIONMOLDINGUSINGTAGUCHIMETHOD,ANOVA,ANDNEURALNETWORKTWENTYSEVENINJECTIONMOLDINGEXPERIMENTSWEREPERFORMEDTOOBTAINTHESHRINKAGEVALUESFORTWODIFFERENTPOLYMERMATERIALSOFPOLYPROPYLENEPPANDPOLYSTYRENEPSFROMTHISSTUDY,ITCANBESEENTHATANINTEGRATEDAPPROACHISPRESENTEDTOOBTAINMINIMUMSHRINKAGECORRESPONDINGTOTHEBESTPROCESSCONDITIONSASDIFFERENTFROMTHELITERATUREABOVE,SOMERESEARCHERSONLYFOCUSEDONTHEMACHININGPROCESSESWHICHARETHEELECTRICDISCHARGEMACHININGEDMINSUMMARY,EVENTHOUGHTHESERESEARCHERSWORKTHEDIFFERENTELDS,THEYHAVEEMPLOYEDTHESIMILARMETHODS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