How To Avoid Generate Bubbles For Aluminum Profiles

When the aluminum profile is pressurized, if there is air left in the aluminum profile, it will cause air bubbles inside and on the surface of the aluminum profile, making the aluminum profile become waste. Therefore, in order to prevent air from entering the aluminum profile, it is necessary to find out why the air is brought in. The following small series introduces the main methods of residual air inside the four extruded aluminum profiles.

1. The hot shearing of the long rod leads to the residue of air. The shear plane formed when the rod is thermally sheared is absolutely not perfect and vertical. The simple thermal shearing of long rods in industrial aluminum profiles will cause the bending of the column rods to be very serious, resulting in an oval cross-section of the aluminum profile and a very large rounded corner that is cut. Even with the newest type of long rod hot shear, the edge angle of the sheared rod will always be rounded, and these roundings are the best places for air to remain.
2. Upsetting leads to the residue of air. Only when the diameter of the cylinder containing the aluminum ingot is larger than the diameter of the rod, the rod can be put into the cylinder containing the aluminum ingot. After the pressure is applied to the rod inside the aluminum ingot barrel to cause the rod to expand to the diameter of the ingot barrel, the gas carried must be discharged. The gas is not discharged, and it will become bubbles when it remains in the aluminum ingot.
3. Air remains due to the connection of two aluminum rods. Because the surface layers of the two stub rods are basically flat, the probability of entraining air is very small. The quality of the sawing directly interferes with the amount of air carried between the two stubs. At present, there is a high-tech that can prevent the two short column rods from being connected to eliminate the possibility of air entering.
4. When extruding aluminum profiles, it is necessary to avoid the entry of air, so as to avoid the situation of air residue, and various defects will occur in the post-processing.