Defect description: The bubbles formed by the gas swelling under the skin of the casting sometimes burst, and there are two kinds of penetrating and non-penetrating.

cause:
1. The mold temperature is too high to open the mold too early
2. The filling speed is too high to make the fluid involved in the gas
3. Excessive spraying amount of volatile gas is involved in the casting
4. The gas in the cavity is not exhausted

Improve methods:
1. Change the diameter of the small pressure chamber to improve the fullness of the molten metal;
2. Extend the injection time, reduce the injection speed of the first stage, and change the switching point between low and high speed injection
3. Reduce mold temperature and maintain thermal balance;
4. Add exhaust groove and overflow groove to fully exhaust and remove the oil and waste on the exhaust groove in time; 5. Adjust the smelting process and perform degassing treatment;
6. Prolong the staying time properly;
7. Reduce the dosage of release agent.

During the production of aluminum alloy die-casting parts, pay more attention to the changes in the details of the die-casting mold and die-casting machine, and take good methods as a habit, and the quality will be guaranteed.

Ningbo Hongxin Precision Machinery Co., Ltd. is a professional manufacturer of die casting, prototype, injection molded parts and CNC parts, welcome to contact us to discuss project development.