Aluminum Extrusion Troubleshooting

Weld line

Problem Description

Visible weld lines appear on exposed surfaces, potentially affecting strength or appearance.

Cause–Correction Mapping
  • Improper die design
    Cause in: Die

      Corrections

    • Redesign die to weld on a none-exposed surface, if possible.

      Advantage: Better surface flow and control.
  • Poor feeding in armpits/weld chambers
    Cause in: Die

      Corrections

    • Increase flow into welding chamber (armpit), streamline welding area.

      Disadvantage: Decreases strength of die.

Please note that the information provided in this article is intended to be a general guide to the causes and corrections of Weld line in aluminum extrusion. However, it is important to note that the specific cause and correction of any particular defect will vary depending on the specific extrusion process, alloy, and other factors. Therefore, it is important to consult with an experienced and professional engineer to ensure that the correct diagnosis is made and the most suitable correction is chosen.