Aluminum Extrusion Troubleshooting

Wall thickness varying/ uneven/ shifting

Problem Description

Wall thickness varies beyond tolerance and may change during the extrusion run.

Cause–Correction Mapping
  • Core shifting
    Cause in: Die

      Corrections

    • Open walls.

    • Adjust port openings.

    • Increase billet temperature.

    • Lower extrusion speed.

    • Consider redesign or replacement of tool.

  • Cracked walls
    Cause in: Die

      Corrections

    • Replace die.

  • Improper pin-outs or die openings
    Cause in: Die

      Corrections

    • Open walls as required.

Please note that the information provided in this article is intended to be a general guide to the causes and corrections of Wall thickness varying/ uneven/ shifting 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.