Troubleshooting for Small Film Blowing Machine
1. Unstable Film Bubble / Swaying
• Causes: Unstable air flow, high temperature, uneven haul-off speed, uneven die outlet
• Solutions: Adjust air ring volume, lower temperature, stabilize haul-off, clean die head
2. Uneven Film Thickness
• Causes: Clogged air ring, large temperature difference in die, unstable screw speed
• Solutions: Clean air ring, check heater bands, stabilize screw speed
3. Fish Eyes / Rough Surface
• Causes: Moisture in material, carbon deposits in die, broken screen
• Solutions: Dry raw material, clean die head, replace filter screen
4. Frequent Film Breaking
• Causes: Low temperature, excessive screw speed, poor material quality
• Solutions: Increase temperature, reduce speed, use qualified material
5. Winding Deviation / Uneven Rolls
• Causes: Unbalanced roller pressure, unlevel guide rollers, eccentric bubble
• Solutions: Adjust pressure, align rollers, center die & air ring
6. No or Slow Discharge
• Causes: Insufficient heating, screw blockage, bridging in hopper
• Solutions: Raise temperature, clean screw, unblock hopper
7. High Main Motor Current / Overload
• Causes: Low temperature, overfeeding, lack of lubrication
• Solutions: Increase temperature, reduce feeding, lubricate bearings & gearbox
8. Temperature Cannot Reach Set Value
• Causes: Burnt heater, poor thermocouple contact, circuit fault
• Solutions: Replace heater, refit thermocouple, check wiring
