Daily Maintenance & Common Troubleshooting for Liquid Packaging Machine
2026-09-03admin7
1. Routine Maintenance Schedule
After Every Production Shift
Clean all liquid-contact parts including filling nozzles, pump chamber, material hopper and product pipelines. Rinse away residual liquid to prevent liquid deterioration, sediment buildup and pipe blockage. Inspect sealing jaws for sticky material residues. Note: For food-grade production, use food-safe cleaning agents.
Weekly Maintenance
Inspect rotor-pump components for wear. Clear blockages inside filling nozzles. Check seal rings, tubing connections for liquid leakage risks. Verify tension of drive belts and fasten loose screws. Clean sensor surfaces.
Monthly Maintenance
Lubricate moving mechanical parts. Run test filling cycles to confirm filling volume accuracy. Check heating temperature of sealing jaws, PLC touchscreen and sensor signals. Replace heavily worn spare parts proactively before failure occurs.
Critical Safety Reminder
All cleaning and maintenance operations must be performed after power-off. Never clean the running or powered-on machine to avoid electric shock and mechanical injury.
2. Common Failures & Practical Solutions
Problem 1: Inaccurate filling volume
Possible causes: Air bubbles trapped inside liquid; worn pump seals; clogged filling nozzle; unstable material feeding.
Solutions: Remove foam from raw liquid; inspect and replace worn seal rings; disassemble and clean filling nozzle; stabilize liquid supply pressure.
Problem 2: Liquid leakage at nozzle / pipeline joints
Possible causes: Damaged sealing rings; loose pipe connectors; residual particles stuck on sealing surface.
Solutions: Renew aged seal rings; retighten pipe connections; clear particle debris from contact surfaces.
Problem 3: Excessive foaming during filling leading to bag overflow
Possible causes: High-foam liquid without anti-foam configuration; too fast filling speed.
Solutions: Activate bottom-up filling function if equipped; reduce filling speed on control panel.
Problem 4: Poor sealing, bag leaking or wrinkled seal seams
Possible causes: Unstable sealing temperature; sticky liquid residue on sealing jaws; uneven film traction tension.
Solutions: Readjust sealing temperature parameters; thoroughly clean sealing jaws; calibrate film traction tension.
Problem 5: Machine stops or mode response delay
Possible causes: Incorrect parameter settings; loose sensor wiring; signal interference.
Solutions: Restore saved preset parameters; check sensor cable connections; reboot the control system.
3. Operation Mistakes to Avoid
Do not run the machine with empty hopper for a long time, which will accelerate wear of rotor-pump internal parts.
Do not leave residual liquid inside pipelines for long periods after production, which may cause sediment and blockage.
Do not use non-compatible sealing rings for corrosive chemical liquids, to prevent rapid part corrosion and liquid leakage.
Do not arbitrarily modify PLC parameters without technical guidance, otherwise filling and sealing performance will be affected.
4. Recommended Quick-Wear Spare Parts for Overseas Users
Keep core wearing components in your local warehouse for rapid replacement: Seal rings, filling nozzles, sealing jaws, tubing and drive belts. Local stock can greatly shorten production downtime when parts need replacement.
Conclusion
Planned regular maintenance minimizes unexpected breakdowns of liquid packaging machines. Most typical malfunctions can be resolved via simple inspection and parameter adjustment before contacting after-sales support.
Contact our technical team for remote guidance, spare-part supply and professional support for your liquid packaging line.
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