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1、《塑料成型工艺及模具设计》试卷二)（Plasticmoldingprocessandmolddesignpapertwo)）"Plasticmoldingprocessandmolddesign"papertwo100points,thetesttime150minutesFirst,fillintheblanks(1pointsperminute,30points)Therearetwomethodsand1,preparationofsyntheticresin.2,plasticsintheprocessofchange,therearethreekindsofdiff
2、erentphysicalstate:,,.3,inordertofacilitatethedemouldingofplasticparts,thesidestructureofplasticpartsshouldbeavoidedorsetasfaraspossible.4,inordertomakethemoldstructuresimplified,ingeneralcircumstances,theplasticpartsshouldberetainedorplacedafterthemoldopening.5.Thepurposeofsettingupprecise
3、positioningdeviceistoplayaroleinthecavitywhentheconeontheothersideofthemoldholdsthecavityontheothersideofthemold.6,theinjectionmoldingneedstocontrolthetemperature,temperature,temperatureandtemperature.7andahalfcompressiondiecavitytypeoverflowchargingsetat.ExcessrawmaterialscanpassthroughThe
4、nremovestorage.8,consideringtheheattransferarea,thecrosssectionofthermosettingplasticinjectionmoldshouldbeshaped;thermoplasticinjectionmoldingThecrosssectionofpartingchannelissuitableforuse.Consideringtheeasyprocessing,theshapesandshapesofthermoplasticsinjectionmouldsarecommonlyused.9,tokno
5、wwhetheraninjectionmoldingmachineclampingmoldclamping,needtousethesizeofthemoldtocomparetheequipment(technicalparameters),(technicalparameters).10.Themainaxisofthemainchannelislocatedinthemold,whichisheavywiththeaxisoftheinjectionmachineHe.11,onthedirectgate(alsocalledthespruegate)coreendis
6、providedwithapit,thepitiscalled,Theactionistomeltthemelt.12,inordertocontrolandpreventtheplasticmoldingorinuseprocess,becauseoftheheat,light,oxygenandothereffectsanddegradation,oxidation,chainchainbreakingphenomenonresultingindestruction,adding.Two,singlechoice(1pointsperday,atotalof10point
7、s)1,thefollowingbelongstoplasticsthermosettingplastics(is).A,polyethyleneB,ABSC,nylonD,phenolicresin2,theviscosityofplasticmelthasnothingtodowithshearrate,calledthiskindofmeltis()fluid.A,haB,expansiveC,NewtonD,pseudoplastic3,themoldcavity(less)islikelyto
