外文翻译-模具类注塑机模具设计

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1、外文翻译毕业设计题目：操纵机构及其面板凸轮机构模具设计原文1：PlasticMaterialMolding译文1：塑料成型原文2：TheInjection-moldingMaching译文2：注塑机1PlasticMaterialMoldingPlasticobjectsareformedbycomperssion,transfer,andinjectionmolding.Otherprocessesarecasting,extrusionandlaminating,filamentwinding,sheetforming,jointing,foam

2、ing,andmaching.Someoftheseandstillotherrsareusedforrubber.Areasonforavarietyofprocessesisthatdifferentmaterialsmustbeworkedindifferentways.Also,eachmethodsisadvantageousforcertainkindofproduct(Table1)Table1CharacteristicsofFormingandShapingProcessesforPlasticsandCompositeMateri

3、alsprocessCharacteristicsExtrusionLong,uniform,solidorhollowcomplexcross-sections;highproductionrates;lowtoolingcosts;widetolerrances.InjectionmoldingComplexshapesofvarioussizes,eliminatingassembly;highproductionrates;costlytooling;gooddimensionalaccurancy.Structuralfoammolding

4、Largepartswithhighstiffness-to-weightratio;lessexpensivetoolingthanininjectionmolding;lowproductionrates.BlowmoldingHollowthin-walledpartsofvarioussizes;highproductionratesandlowcostformakingcontainers.RotationalmoldingLargehollowshapesofrelativelysimpleshape;lowtoolingcost;low

5、productionrates.ThermoformingShalloworrelativelydeepcavities;lowtoolingcosts;mediumproductionrates.CompressionmoldingPartssimilartoimpression-dieforging;relativelyinpensivetooling;mediumproductionrates.TransfermoldingMorecomplexpartsthancompressionmoldingandhigherproductionrate

6、s;somescraploss;mediumtoolingcost.17CastingSimpleorintricateshapesmadewithflexiblemolds;lowproductionrates.ProcessingofcompositematerialsLongcycletime;tolerancesandtoolingcostdependonprocess.Therearetwomainstepsinthemanufactureofplasticproducts.Thefirstisachemicalprocesstocreat

7、etheresin.Thesecondistomixandshapeallthematerialintothefinishedarticleorproduct.1.1CompressionMoldingIncompressionmolding,apreshapedchargeofmaterial,apremeasuredvolumeofpowder,oraviscousmixtureofliquidredinandfillermaterialisplaceddirectlyintoaheatedmoldcavity.Formingisdoneunde

8、rpressurefromaplugorfromtheupperhalfofthedie(Figer1).C