Aluminum Extrusion Troubleshooting

Uneven Wall

Problem Description

Walls of equal design thickness extrude with unequal actual thickness.

Cause–Correction Mapping
  • Difference in bearing length on equal wall thickness
    Cause in: Die

      Corrections

    • Mill bearing to equal lengths.

  • Poor metal flow
    Cause in: Die

      Corrections

    • Balance metal flow by modifying feed and/or bearing length.

      Advantage: Improved metal flow.

Please note that the information provided in this article is intended to be a general guide to the causes and corrections of Uneven Wall 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.