VI-Casting Definitions and Terminology

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1、CastingDefinitionsandTerminologyManufacturingMenu

2、CastingManufacturingServiceshttp://www.engineersedge.com/casting_definition.htmMyASNTLevelIIIVISelfStudyNotesCharlieChong/FionZhangAAs-CastCondition:Castingwithoutsubsequentheattreatment.CharlieChong/FionZhangBBackDraft:Reversetaperwhichwouldpr

3、eventremovalofapatternfromamoldoracorefromacoreboxBar,Flask:Aribinthecopeofatightflasktohelpsupportthesand.BackingSand:Thebulkofthesandintheflask.Thesandcompactedontopofthefacingsandthatcoversthepattern.Binder:Thebondingagentusedasanadditivetomoldorcoresandtoimpartstrengthofplasticityinadrysta

4、te.BlastingorBlastCleaning:Aprocessforcleaningorfinishingmetalobjectsbyuseofanairblastorcentrifugalwheelthatthrowsabrasiveparticlesagainstthesurfacesoftheworkpieces.Smallirregularparticlesofmetalareusedastheabrasiveingritblasting;sandinsandblasting;andsteelballsinshotblasting.Bleeder:Adefectwh

5、ereinacastinglackscompletenessduetomoltenmetaldrainingorleakingoutofsomepartofthemoldcavityafterpouringhasstopped.Burn-OnSand:Sandadheringtothesurfaceofthecastingthatisextremelydifficulttoremove.Burn-Out:Firingamoldatahightemperaturetoremovepatternmaterialresidue.CharlieChong/FionZhangCCasting

6、Yield:Theweightofcastingorcastingsdividedbythetotalweightofmetalpouredintothemold,expressedasapercent.CentrifugalCasting:Aprocessoffillingmoldsby1)pouringmetalintoasandorpermanentmoldthatisrevolvingabouteitheritshorizontaloritsverticalaxis;or2)pouringmetalintoamoldthatissubsequentlyrevolvedbef

7、oresolidificationofthemetaliscomplete.SeealsoCentrifugeCasting.CentrifugeCasting-Acastingtechnique.Cavity:TheportionofacastwhichformstheexternalshapeChaplet:Asmallmetalinsertorspacerusedinmoldstoprovidecoresupportduringthecastingprocess.Charge:Agivenweightofmetalintroducedintothecastingfurnace

8、.Chill:Ametalinsertinthesandmoldusedtoproducelocalchillingandequalizerateofsolidificationthroughoutthecasting.Cleaning:Removalofrunners,risers,flash,surplusmetalandsandfromacasting.CO2Process:Moldsandcoresmadewithsandcontainingsodiumsil