The die-casting aluminum part is actually a die-casting part, which is manufactured by a die-casting machine. In the process of manufacturing aluminum die-casting parts, we will first heat the liquid metal aluminum or metal aluminum alloy. After the heating is completed, we can pour them into the feeding port of the machine. The die-casting machine produces aluminum die-casting parts according to the shape of the mold . After the production of aluminum die-casting parts is completed, there are often cases of long holes on the surface. Why?
Because aluminum and aluminum alloys have good fluidity and plasticity, and the casting process is cast in a pressure die casting machine, aluminum die castings can be made in a variety of more complex shapes, and can also be made with higher precision and The smoothness greatly reduces the machining amount of castings and the casting allowance of metal aluminum or aluminum alloy, which not only saves electricity, metal materials, but also greatly saves labor costs.
Therefore, aluminum die castings are widely used in various industries such as automobile manufacturing, internal combustion engine production, motorcycle manufacturing, motor manufacturing, oil pump manufacturing, transmission machinery manufacturing, precision instruments, garden beautification, power construction, and building decoration. Aluminum and aluminum alloys have excellent thermal conductivity, small specific gravity and high workability.
In the processing process, defects such as trachoma may sometimes occur. To avoid the phenomenon of stomata trachoma in the production process of aluminum die castings, the following summary is cast: to ensure the quality of refining and degassing of aluminum alloy smelting, choose a good refining agent and degasser Reduce the gas content in aluminum water, remove oxides such as liquid surface scum and bubbles in time, and prevent the gas from being brought into the die casting again.
Choose a good release agent. The selected release agent should not generate gas during die casting and have good release performance; ensure that the exhaust of the mold is unobstructed and not blocked, the exhaust is smooth, and the gas in the mold is guaranteed Complete exhaust, especially the exhaust channel at the final polymerization of aluminum water must be unobstructed; adjust the die-casting parameters, and the filling speed should not be too fast to prevent gas.
In the product design and mold design, attention should be paid to the use of core pulling and cooling to minimize the shortcomings of excessive wall difference; the air holes that often appear in fixed parts should be improved from the mold and design. In summary, in the die-casting industry, if the above six measures are implemented, the scrap rate of aluminum alloy die-casting products can be significantly reduced, which will significantly improve the product's pass rate.