Method to reduce the porosity trachoma of aluminum die casting products

In order to avoid the trachoma of porosity in aluminum die casting process, the following points are summarized.

1. Ensure the quality of degassing in aluminum alloy smelting, a good degassing agent to reduce the air content in aluminum water, timely remove the liquid level scum, bubble other oxides, prevent the gas entering the die casting again;

2, choose a good demoulding agent, the chosen demoulding agent should be in the die casting does produce gas, has good demoulding performance;

3. Ensure that the mold's exhaust is unobblocked smooth; ensure that the mold's gas is completely discharged, especially at the final aggregation of aluminum water, the exhaust channel must be unobblocked;

4. Adjust the die casting parameters, the filling speed shall be too fast to prevent air entrapment;

5. In product design mold design, attention should be paid to core-pulling cooling to minimize the shortcomings of excessive wall difference;

6. The air holes that often appear in the fixed part should be improved the mold design.