Global Casting News

Lost wax castings


Lost wax casting is the main technology of investment castings.The engineers in Tongda have been in this field for many years with mature technology.So we are in great confidence to ensure good quality.The main process of lost wax castings is: Pattern Design--Wax Model Manufacturing --Wax Model Assembly--Model Shell Making--Dewaxing--Model Shell Baking--Melting--Compound Analyse--Pouring--Sand Stripping--Heat Treatment--Packing--Warehouse.

Advantages of lost wax castings:

①Accuracy:dimension tolerance--CT5~CT7,roughness--Ra2.5~6.3μm,weights range from 10g to 80kg;
②the surface shape and inner cavity is almost not limited,we could manufacture lost wax castings with minimum wall thickness 0.5mm;
③various steel can be used in alloy steel, stainless steel, carbon steel.

Classification of lost wax castings:

a.water glass casting: large surface roughness,low dimension accuracy with short shell making cycle.The typical product with this technology is bucket teeth,which is widely used in construction machinery.

b.Silica sol casting: small roughness,high dimension accuracy with high material costs and long shell making cycle.we normally use silica sol casting technology to make stainless steel castings.

Tongda could manufacture both blanks and machined lost wax castings. So if  you are interested,pls do not hesitate to conact us.We will offer you our best prices for your reference first once we receive your drawings or samples.