Precision castingwhichis commonly used is theinvestment casting,also known as thelost wax casting:selection ofmouldmaterialssuitable(such as paraffin)mademoldincasting;repeatwithrefractory coatingandcastrefractory sandprocess,hardenedshelland dry;theinternalmouldmelted away,getthe cavity;roastingshelltoobtain enough strength,andburned themoldmaterial,residual;metalmaterials pouringin need;solidification and coolingprocess,sand,and obtain high accuracyof finished products.According to the requirement of the productor heat treatmentand coldprocessing and surface treatment.For example,sand casting,a large number of production factories shouldcreate conditions toadopt advanced technologymolding,core makingmethod.Old fashioned shock typeor production ofjolt squeeze mouldingmachine lineproductivityis not high enough,the bignoise,labor intensitybig,does notmeet the requirement of mass production,we shouldgradually change.For smallcastings,can adopthorizontal typeorvertical typenonproduction line,box ofhigh pressure molding machinetypemolding productionand has high efficiency,covers an area ofless;for themembercan choosevariousbox production line,high pressure moldingmachine,air impact molding line,to adapt to the fast,high precisionmolding production linerequirements,core makingmethod can select:cold core box,the hot core box,shell coreand highcore makingmethod.
