existPrecision castingIn the process, cutting is minimized or not performed at all. It is a casting process with little or no cutting, and it is an excellent process technology for casting. It has a wide range of applications, not only suitable for casting of various types and alloys, but also the dimensional accuracy and surface quality of the castings produced are higher than other casting methods.

The casting size obtained by precision casting is more accurate, and the surface finish is better. Including investment casting, ceramic casting, metal casting, pressure casting and lost foam casting.
Considering that the shrinkage of cast steel is much higher than that of cast iron, in order to avoid the shrinkage and relaxation defects of castings, most of the casting process adopts the methods of riser, chilled iron and subsidy to solidify one after another. In addition, in order to avoid shrinkage, relaxation, porosity and crack defects of stainless steel (stainless steel and acid-resistant steel) castings, the wall thickness must be uniform, and sharp and right-angled structures must be avoided. Sawdust is added to the casting sand and coke is added to the core. , Adopting hollow core and oil sand core, etc., to improve the concession and air permeability of sand core.