First, the use of the two is different, second, the composition of the two is different, and third, the requirements of the two are different
2021-05-26The casting blank of the valve is a thin-walled shell with a complex structure. The casting requires smooth surface and clear casting, especially dense defects. In order to meet the above requirements, a series of process measures should be taken during casting, such as the selection of high refractory molding materials and control of sand moisture, the modeling should be layered to ensure the hardness of the sand, the use of a reasonable gating system and strict control of pouring speed and temperature. Due to the high technical requirements, the casting process of the valve blank is far more complex than that of the general casting.
2021-04-06