The main factors of residual air inside extruded aluminum profiles

When the aluminum profile extruder is pressurized, air will remain in the aluminum profile, causing bubbles to appear on the inside and outside of the aluminum profile, causing defects that cannot be completely resolved, making the aluminum profile waste. In order to prevent air from entering the aluminum profile, it is necessary to find out the reason why the air is brought in. The main factors for the air remaining in the extruded aluminum profile include: The hot shear of the long rod leads to the air remaining. The shear surface formed during the thermal shearing of the long rod is absolutely not perfect. The simple thermal shearing of the vertical industrial aluminum profile profile will cause the rod to bend very seriously, resulting in an elliptical cross section of the aluminum profile. And a very huge round corner being cut. Even with the latest long rod hot shear, the edge angle of the sheared rod will always be rounded, and these rounds are the best places for air to remain. Upsetting caused air to remain. Only when the diameter of the cylinder containing the aluminum ingot is larger than the diameter of the rod. The pole is enough to be put into the tube containing the aluminum ingot. After applying pressure to the rod in the aluminum ingot tube, which causes the rod to expand to the diameter of the ingot tube, the gas must be discharged. If the gas is not discharged, it will eventually become bubbles in the aluminum ingot. Due to the connection of the two aluminum rods, air remains. Because the surface layers of the two short rods are basically flat, the probability of carrying in air is very small. The quality of the sawing directly interferes with the amount of air carried between the two short poles. At present, there is a high technology that can prevent two short poles from being connected. Proceed to eliminate the possibility of air ingress. ————The article comes from the Internet. If there is any infringement, please contact to delete it.
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