The reason why auto parts die-casting is widely used is that it has the advantages of strong plasticity, light material, not easy to rust, durable, and long service life. Its production process and processing also have many problems that need attention. If you are not careful, it may cause bubbles in the material. Today, I will introduce the causes of bubbles. Analysis of the causes of bubbles in the production of aluminum alloy materials 1. The fullness of the molten metal in the injection cavity is too low, generally controlled at 45% to 70%, it is easy to generate gas, and the initial injection speed is too high. 2. The mold of the pouring system is unreasonable or the exhaust is poor. 3. The melting temperature is too high, the gas content is high, and there is no degassing. 4. The mold temperature is too high, the mold holding time is not up to the standard, the metal solidification time is not enough, the aluminum alloy profile is not strong enough, and the mold is opened prematurely, resulting in the expansion of the pressurized gas. 5. Excessive amount of release agent and injection head oil. 6. The blowing time after spraying is not long enough, and the moisture on the surface of the mold is not dry.