Extruding Machine Operator how-to

How to Fix Bubbles in Extruded Plastic

Bubbles usually mean moisture.

Updated By the Career Education Institute Curriculum Team
Quick answer

Bubbles usually mean moisture. In short: check; check; check, then complete the remaining steps below.

Step by step

  1. Check resin dryer.

  2. Check temperatures.

  3. Check for contamination.

  4. Adjust.

  5. Purge.

  6. Test.

Safety reminders for extruding machine operators

  • Wear heat gloves
  • Guard pullers and cutters
  • Follow lockout/tagout
  • Wear hearing protection

Extruder · Die · Barrel zone · Screw · Puller · Wall thickness: see the full extruding machine operator glossary.

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