What are the Reasons and Solutions for Residual Air During Aluminum Extrusion?

When the aluminum extruder is pressurized, air will remain in the aluminum profile, causing air bubbles to appear inside and on the surface of the aluminum profile, resulting in defects that cannot be completely solved, making the aluminum profile waste. In order to prevent air from entering the aluminum profile, it is necessary to find out why the air is brought in. The following description of the Modular Pipe System Manufacturer is the main reason for the residual air in the four extruded aluminum profiles.

Aluminum Extrusion Profile

1. Hot shearing of long rods leads to residual air. The shear surface formed during thermal shearing of the rod is absolutely not perfect and vertical. Industrial aluminum profiles simply undergoing hot shearing of long rods can cause severe bending of the rods, resulting in an oval-shaped cross-section of the aluminum profile and a very large rounded corner being cut off. Even with the latest type of long-bar hot shear, the angle of the edge of the bar being cut always produces rounds, and these rounds are the best place for air residue.

2.Upset causes air to remain. Only when the diameter of the cylinder containing the aluminum ingot is larger than the diameter of the rod, can the rod be put into the cylinder containing the aluminum ingot. After pressure is applied to the rods in the aluminum ingot cylinder, which causes the rods to expand to the diameter of the ingot cylinder, the gas carried must be discharged. The gas is not discharged, and it will eventually become a bubble in the aluminum ingot.

3. Residual air caused by the contact of two aluminum rods. Because the surface of the two short rods is basically flat, the probability of carrying in the air is very small. The quality of the sawing directly interferes with the amount of air carried between the two short rods. At present, there is a new and high technology that can prevent two short rods from contacting each other and eliminate the possibility of air ingress.

4. When the aluminum profile is extruded, it is necessary to avoid the entry of air, so as to avoid the situation of air residue, which is caused by various defects in the post-processing.

Aluminum Extrusion Profile is also known as industrial profile, industrial aluminum extrusion or industrial aluminum alloy profile. It is an alloy material with aluminum as the main component. It is an aluminum material that is hot-melted and extruded to obtain aluminum materials with different cross-sectional shapes. The difference is that the proportion of the added alloy is different, so the mechanical properties and application fields of the produced industrial aluminum profiles are also different. Application areas Generally speaking, industrial aluminum profiles refer to all-aluminum profiles except those used in building doors and windows, curtain walls, indoor and outdoor decoration and building structures.

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