Cooling & trim defect
Trimming burrs & rough edges in thermoforming
Also called: Poor cut quality
Trimming burrs are rough, ragged or fuzzy edges left after the formed part is cut to net shape — a cosmetic and sometimes functional defect at the cut line.
Why it happens
- Dull or wrong-geometry cutting tools
- Wrong feed/speed for the material
- Part not fully cooled/stabilised before trimming
- Vibration or poor fixturing during the cut
How to fix & prevent it
- Use sharp tooling matched to the material
- Set correct feed and speed on the router
- Trim only after the part has stabilised
- Fixture the part rigidly on datums
How Indu prevents it: We trim on 5-axis CNC with tooling and feeds matched to each material, on fixtures referenced to the part datums, for clean edges and repeatable cut-outs.
Troubleshooting help
Fighting trimming burrs & rough edges on a part?
Send your drawing, sample or a photo of the issue — our engineers will diagnose the cause and reply with the tooling, material and process fix, usually within 24 hours.
ISO 9001:2015 certified · Most quotes back within 24 hours