Cause analysis of aluminum profile bubble

In the whole process of manufacturing aluminum profiles, aluminum profile manufacturers must pay attention to many regions. Unreasonable actual operation is likely to result in convex concave or inner cavity of different sizes under the outer skin of the casting surface. Let's analyze the causes of bubbles and how to prevent them.

Causes of bubbles in aluminum profiles:

1. The filling of molten metal materials in the introduction chamber is too low, which is generally controlled at about 45% - 70%, which is very easy to bring in, and the original introduction rate is too high.

2. The mold in the rubber inlet system software is unscientific or the exhaust pipe is poor.

3. Too high smelting temperature makes its gas composition relatively high, and the solution is not distilled under reduced pressure.

4. The mold temperature is too high, the mold maintenance time is unqualified, the initial setting of metal materials is not enough, and the compressive strength of aluminum profile is not enough. The mold is opened too early and the pressurized gas rises.

5. Too much film remover and printer nozzle oil.

6. The injection molding time after painting is not long enough, and the surface water of the mold is not dry.

Ways to prevent air bubbles

1. Main parameters of die casting process, conversion point between injection rate and high pressure injection rate.

2. Change the flow passage of the die and add overflow groove and exhaust pipe groove.

3. The aluminum profile reduces the die temperature in the defective area, thereby reducing the working pressure of the gas.

4. Regulate the whole process of the smelter.

5, increase the mold maintenance time, and adjust the injection time after painting.