When processing stainless steel pump castings, pay attention to the following two points:

1. Insulation is achieved by appropriately extending the insulation time of the casting in the sand mold, mainly by controlling the unboxing temperature to be below 70 ° C, ensuring that the casting fully completes liquid and solid shrinkage in the sand mold, and avoiding stress concentration caused by external forces

2. During the sand removal process of castings, it is strictly prohibited to pour water onto the sand mold and castings during boxing. It is also strictly prohibited to use strong external impact methods such as box collision to remove sand, in order to avoid the interaction between external forces and internal stresses in the castings from causing cracks.