Common problems of aluminum alloy profiles in industrial production: Bubbles and peeling

• The surface of the product has raised bubbles. The complete bubbles are called bubbles, and the broken ones are called peeling.

• The main causes include dirt such as moisture and oil in the extrusion cylinder or pad, air entering the metal surface during extrusion, moisture in the lubricant, looseness and pores in the ingot, high hydrogen content in the product, and high extrusion cylinder temperature and ingot temperature.