ABA Film Blowing Machine: Original Parts Replacement & Maintenance

 Replacement and Maintenance of Original Parts for ABA Film Blowing Machine

As a double-layer co-extrusion film blowing unit, the performance of core components including die head, screw, heater band, air ring and pull roll directly determines film quality and production efficiency. Standard procedures shall be followed for original part replacement to guarantee operational safety and equipment performance.

1. Pre-operation Preparation

### Safety Protection

Power off the unit and hang maintenance warning sign to prevent accidental startup. Wear heat-resistant gloves and goggles against scald and mechanical injury. Start operation after temperature drops below 60℃.

 Tools & Parts Preparation

Prepare hex wrenches, socket wrenches, screwdrivers, copper brushes, thermometers, micrometers and cleaning cloths. Verify model conformity and intact anti-counterfeit marks of original spare parts.

 2. Replacement Procedures of Key Components

Die Head Replacement

Loosen connecting bolts symmetrically and detach the die head. Clear residual plastic melt without scratching the lip, and replace worn gaskets.

Apply high-temperature sealant, align and fasten bolts evenly. Check lip clearance with tolerance within 0.02mm.

 Screw Replacement

Remove heater bands and cylinder bolts, then pull out the screw slowly. Clean surface residues and inspect cylinder inner wall for scratches.

Coat screw threads with high-temperature grease, insert the new screw coaxially and reassemble components with firm wiring.

Heater Band Replacement

Remove old bands and check terminal oxidation. Fit new bands closely to the cylinder with gap under 1mm. Connect wires in correct phase sequence to avoid uneven heating.

 Air Ring Replacement

Dismount and clean dust and plastic debris inside nozzles. Align the new air ring centrally, set height 5-10cm from die lip and adjust angle for symmetric bubble shape.

 Pull Roll Replacement

Take out the old roll after loosening bearing pedestal bolts. Adjust parallelism within 0.1mm and replace worn bearings timely.

 3. Commissioning & Inspection after Maintenance

Check heating elements and sensors with temperature deviation no more than ±2℃. Run idle operation and confirm steady rotation without abnormal noise.

Carry out trial production and control film thickness tolerance within 5%. Adjust traction speed, air volume and temperature to meet production standards.

4. Daily Maintenance Recommendations

Clean die head and air ring weekly, cylinder and screw monthly. Replace wearing parts such as gaskets and bearings every 3 to 6 months.

Record operational parameters for future troubleshooting. Contact official technicians for complicated faults to avoid equipment damage.

 Conclusion

Strict safety codes and mounting precision are required during original part replacement. Proper maintenance extends service life and stabilizes film quality. Keep regular contact with the manufacturer for updated technical guidance.