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Defects such as trachoma sometimes appear during cnc processing of aluminum alloy parts. To avoid the phenomenon of pore trachoma in the production process of aluminum die castings, Concord makes the following summary here:

1. To ensure the refining and degassing quality of aluminum alloy smelting, select a good refining agent and degasser to reduce the gas content in the aluminum water, and remove oxides such as scum and bubbles on the liquid surface in time to prevent the gas from entering the die-casting parts again;

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

3. Ensure that the exhaust of the mold is unobstructed and not blocked, the exhaust is smooth, and the gas in the mold is completely discharged, especially the exhaust channel at the aluminum water polymerization must be unobstructed;

4. Adjust the die-casting parameters well, and the filling speed should not be too fast to prevent entrained air;

5. Attention should be paid to the use of core pulling and cooling in product design and mold design, so as to minimize the disadvantage of excessive wall difference;

6. For the air holes that often appear in fixed parts, the mold and design should be modified.

To sum up, in the die-casting industry, if the above six measures are implemented, the air hole scrap rate of aluminum alloy die-casting products can be significantly reduced, and the qualified rate of products will be improved.

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