Proper maintenance of gate bushings and nozzles extends mold life and improves part quality.

Gate Bushing Maintenance:
- Clean gate area after each production run using brass brush (never steel)
- Check gate diameter monthly - wear of 0.05mm+ can cause flash
- Polish gate surface when flow marks appear
- Replace bushings when gate wear exceeds 0.1mm

Nozzle Care:
- Inspect nozzle tip for damage before each mold setup
- Clean nozzle tip with copper wire brush while hot
- Check nozzle alignment with sprue bushing - misalignment causes drool
- Apply anti-seize compound on nozzle threads (max 350C rated)

Common Problems:
- Drooling: check nozzle tip temperature and back pressure
- Stringing: adjust nozzle retract timing
- Gate blush: reduce injection speed at gate switch point

Scheduled maintenance every 500 hours keeps your hot runner reliable.

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