《塑料成型工艺及模具设计》试卷二)（plastic molding process and mold design test paper )）

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1、《塑料成型工艺及模具设计》试卷二)（Plasticmoldingprocessandmolddesigntestpaper2)）"Plasticmoldingprocessandmoulddesign"testpaper2Thetesttimeis150minutes1.Fillintheblanks(1pointeachtime,30points)1.Therearetwomethodsforpreparingsyntheticresin.2.Therearethreekindsofplasticsintheprocessofchange,butdifferentp

2、hysicalstates:,.3.Inordertofacilitatethemoldremoval,thelateralstructureoftheplasticpartsshouldbeavoidedasfaraspossible.4.Inordertosimplifythemouldstructure,generally,theplasticpartsshouldbekeptonorabovetheopenmold.5.Thepurposeofsettinguptheprecisionpositioningdeviceistoplayaroleinthecav

3、ityofthemoldwhentheconeononesideofthemoldholdstheshapeoftheothersideofthemold.Thetemperature,temperatureandtemperaturearethetemperature,temperatureandtemperatureintheinjectionmolding.7.Thefeedingcavityofthesemi-spillcompressionmouldislocatedintheplace.ExcessrawmaterialscanbepassedStorei

4、tandthengetridofit.8.Consideringtheheattransferarea,thesectionofthethermosettingplasticinjectionmoldshuntissuitableforthesection;ThermoplasticplasticinjectionmoldingThesectionofdieshuntchannelshouldbeinshape.Fromeasyprocessing,thermoplasticplasticinjectionmoldiscommonlyusedformandshape.

5、9.Ifyouwanttoknowwhetherthemoldwillbeclampedwhenamoldingmachineisclosed,youwillneedtousethemoldsizecomparisonequipment(technicalparameters)and(technicalparameters).Theaxisofthemainchannelisgenerallylocatedinthemould,whichisheavywiththeaxisoftheinjectionmachineClose.Ithasapitinthecoreoft

6、helargeendofthegate,whichiscalledthemainchannelgate.Theactionistomakethemelt.12,inordertosuppressandpreventplasticduringmoldingprocessortheuse,duetotheeffectsuchasheat,light,oxygendegradationandoxidationphenomenonsuchasbrokenchain,alternatingchainandcausedamage,addtheappropriate.(1point

7、,10pointsforeachquestion)1.Thefollowingplasticsbelongtothermosetplastic().A,polyethyleneB,ABSC,nylonD,phenolic2.Theviscosityoftheplasticmeltisindependentoftheshearrate,whichiscalleda()fluid.A,binhaB,swellingC,NewtonianD,pseudoplastic3.Shortageofmoldcavityislikelytocausemoldopen