How to avoid blisters in aluminum alloy die castings?

aluminum alloy die-casting products are mainly used in electronics, automobiles, motors, home appliances and some communications industries. Some high-quality aluminum alloy products with high performance, high precision and high toughness are also used in large aircraft, ships and other industries with high requirements. The main use is still in parts of some instruments. Defects such as sand holes sometimes appear in the production process, so how to avoid sand holes in aluminum alloy die castings?

1. In order to ensure the refining and degassing quality of aluminum alloy profile smelting, a good refining agent degassing agent is used to reduce the gas content in molten aluminum, immediately eliminate metal oxides such as liquid sludge and bubbles, and prevent steam from entering the casting again;

2. Choose a good film release agent. The film release agent used should not generate steam in aluminum die casting, and has excellent release characteristics;

3. Ensure that the exhaust pipe of the abrasive tool is unblocked and the exhaust pipe is unblocked, and ensure that the steam in the abrasive tool is completely discharged, especially the safe passage of the exhaust pipe at the convergence of aluminum and water must be unblocked;

4. Adjust the main parameters of aluminum die-casting, the filling speed should not be too fast to avoid air entrainment;

5. Pay attention to the application of core pulling and refrigeration in the design of products and stamping dies, and try to avoid the defect of excessive wall difference;

6. For the air outlet that often appears in a fixed position, it is necessary to improve the grinding tool and design scheme.