The main factors of residual air inside extruded aluminum profiles

by:Zeyi     2021-08-14
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 residual air. The shear surface formed during the hot shearing of the long rod is absolutely not perfect. The vertical industrial aluminum profile profile is simply grown. The hot shearing of the rod will cause the rod to bend very seriously, resulting in an elliptical cross-section of the aluminum profile and a very large rounded corner after 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.         roughening leads to air residue   only when the diameter of the tube containing the aluminum ingot is larger than the diameter of the rod. Only the pole can 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. The gas is not discharged, and it will eventually become bubbles in the aluminum ingot.    The air remains due to the connection of the two aluminum rods  Because the surface of the two short rods is basically flat, the probability of air being carried in 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.
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