在塑料注射模具的设计中使用田口方法减少翘曲

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1、TheuseofTaguchimethodinthedesignofplasticinjectionmouldforreducingwarpageAbstractPlasticinjectionmouldingisoneofthemostimportantpolymerprocessingoperationsintheplasticindustrytoday.However,lackofskillinmouldmakingandinjectionmouldingmachinecontrolwillleadtodefectiveplasticproduct.Warpagei

2、sonetypeofdefectthatusuallyappearsinproductswiththicknesslessthan1 mm.Thisprojectisgoingtofabricateamouldthatproducedathinplatewithdimension120 mm × 50 mm × 1 mm.Thethinplatewillbeusedforwarpagetesting.Inmouldfabrication,themouldbasethatpurchasewillbemachinedandassembled.Afterthat,themoul

3、disfixedontheinjectionmouldingmachine.Themachinesettingshouldbemadetoproducetheproduct.Then,theproductwillbeusedfortestingontheeffectivefactorsinwarpageproblembyapplyingtheexperimentaldesignofTaguchimethod.Fromtheresults,itshowsthatthemosteffectivefactoronthewarpageismelttemperature.Thefi

4、llingtimeonlyslightlyinfluencedonthewarpage.Theoptimumparametersthatcanminimizethewarpagedefectaremelttemperature(240 °C),fillingtime(0.5 s),packingpressure(90%)andpackingtime(0.6 s).Keywords:Plasticinjectionmould;Taguchimethods;Experimentaldesign;Warpage1.IntroductionMouldmakingisaimport

5、antsupportingindustrybecausetheirrelatedproductsrepresentmorethan70％amongthecomponentsinconsumerproducts.Thehighdemandforshorterdesignandmanufacturingleadtimes,gooddimensionalityandoverallquality,andrapiddesignchangeshasbecomethebottlenecksinmouldindustries[1].Itisacomplicatedprocess,andr

6、equiredskilledandexperiencedmouldmaker.Generally,injectionmouldingisoneofthemostimportantpolymerprocessingoperationsintheplastidindustrytoday.Approximatelyone-thirdofallplasticareconvertedintopartsusinginjectionmoulding[2].Thisisoneoftheprocessesthataregreatlypreferredinmanufacturingindus

7、trybecauseitcanproducecomplex-shapeplasticpartswithgooddimensionalaccuracyandveryshortcycletimes[3].Typicalexamplesarecasingsandhousingoftheproductssuchascomputermonitorandmobiletelephone,whichhaveathinfeature.Theseproductstendtobecomelighter,thinnerandsmaller.Hence