Comprehensive Daily Maintenance and Inspection Guide for Blow Moulding Machines

Routine maintenance is essential to ensure the stable, efficient, and safe operation of blow moulding machines. During production, operators should closely monitor the machine’s operating condition, preform feeding process, and bottle discharge actions to quickly identify any abnormalities. If an issue is detected, the machine should be stopped immediately and corrective measures taken to prevent extended downtime or product defects.

Daily Operation Monitoring

Most daily maintenance tasks can be performed while the machine is running. These include checking and fine-tuning adjustable process parameters such as clamping time, delayed blow time, pre-blow time, and final blow time. Maintenance intensity should be adjusted based on machine performance and the surrounding operating environment.

When sufficient preform inventory is available or during planned production pauses, a more comprehensive inspection should be conducted to further optimize machine performance. Operators must also ensure that the compressor lubrication oil level remains within the recommended range at all times.

Cleaning

Cleanliness plays a critical role in maintaining smooth machine operation. When removing excess grease—especially around the clamping mechanism and linkage components—the machine must be completely stopped to ensure safety.

Additional Mechanical Checks

• Inspect all bolts and nuts to ensure proper tightening.

• Verify that proximity switch mounting nuts are secure.

• Check the conveyor belt tension on the loading unit and adjust if necessary.

Daily Inspection and Maintenance Checklist

• Inspect finished bottle quality for defects.

• Ensure the cooling water system is unobstructed and functioning properly.

• Listen for abnormal noises and check the pneumatic system for air leaks.

• Confirm that all solenoid valve coil retaining nuts are securely fastened.

• Inspect air hoses for bending, kinking, or damage.

• Drain the air storage tank and related equipment (in high-humidity environments, drain every 4 hours).

• Verify that control circuits and high-pressure blowing air pressure are within specified limits.

• Check that stretch rod retaining bolts and fiber screws are securely tightened.

• Inspect the mold bottom drive stroke nut for proper fastening.

• Ensure sufficient oil levels in the lubricator and motor gearbox.

• Confirm normal operation of the exhaust fan.

• Check the compressor lubrication oil level daily.