Aluminum Extrusion Troubleshooting

Portion of profile starving

Problem Description

Only a portion of the profile experiences metal starvation while the rest appears normal.

Cause–Correction Mapping
  • Lack of compaction
    Cause in: Die

      Corrections

    • Cool billet; increase welding chamber; choke bearing; add restrictor bumps.

      Disadvantage: May weaken die.
  • Lack of feed
    Cause in: Die

      Corrections

    • Grind feed into slow areas.

      Advantage: Metal will weld sooner and will fill in around mandrel better.

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