Profile Extrusion Troubleshooting

Profile Extrusion Troubleshooting

Problems

Suggested Solutions

Pitting or Foaming Further drying is required
Rough Appearance Check that proper screw is installed
Too Glossy Reduce screw speed
Reduce barrel temperature
Check that proper screw is installed
Surging Reduce screw speed
Eliminate screw cooling
Dimensional Variation Reduce screw speed
Black specks, Burning Check temperatures
Check quality and material of construction for surfaces in contact with melt
Check for streamlined, low inventory die/adapter
Clean out all burned or foreign material from die, adapter, and extruder
Check that proper screw is installed
Poor Impact and Physical Properties Check stock temperatures