How to prevent trachoma defects in castings?

The following points can effectively prevent trachoma defects in castings.

1. The scum and foam oxides should be cleaned up in time.

2. Choose a good release agent. The selected release agent should not generate gas in die casting and have good release performance.

3. Ensure that the mold is usually not blocked and the exhaust is smooth.

4. Adjust the die casting parameters, types of die casting and the filling speed should not be too fast to prevent air entrainment.

5. In the design of products and molds, attention should be paid to the use of core-pulling cooling to minimize the disadvantage of excessive wall difference.

6. Improve the pores that often appear in the fixed parts from the mold and design.