Common quality problems of aluminum alloy profiles are

• Profile bay twist, wave

• Bubbles and peeling

• Extrusion cracks

• Pitting or pitting

• Scratches and ridges

• Dimensions not acceptable

• Layering

• Tail-down

• Nonconforming performance

• Extruded horizontal striping

in addition, there are also over-size, uneven thickness, uneven wall thickness, ellipse, uneven line diameter, cracked edge, curling, bending, side bending (sickle bending), 8-shaped, twisted, oblique cutting, uneven end face, unformed, scratched, scratched, bruised, unqualified mechanical properties, over-size geometric, extruded ripple, black-gray spots after anodizing, stripe defects, welded stripes, metal transverse tearing, etc.

These problems may be caused by unreasonable mold design, too fast extrusion speed, improper temperature control, poor ingot quality, equipment failure and other factors.