Aluminum Extrusion Troubleshooting

Uneven rod (runout) length

Problem Description

Rod or extrusion length varies due to flow or alignment issues.

Cause–Correction Mapping
  • Bearing squareness
    Cause in: Die

      Corrections

    • Square the bearings perpendicular to die face, flatten bearings perpendicular to metal flow.

  • Press alignment
    Cause in: Equipment

      Corrections

    • Correct press alignment.

  • Uneven bearing lengths
    Cause in: Die

      Corrections

    • Balance bearing lengths by milling/grinding.

  • Uneven flow
    Cause in: Die

      Corrections

    • Balance flow by milling/grinding ports/feed

      Advantage: Increased production, better yield and decrease scrap.

Please note that the information provided in this article is intended to be a general guide to the causes and corrections of Uneven rod (runout) length 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.