Maintenance and working principle of side-seal liquid packaging machine
Jun 11, 2025
Introduction:
Side-seal liquid packaging machine is a key equipment in the packaging industry, mainly used to fill liquids such as yogurt, milk and juice into bag packaging. The working principle of this machine is to form the roll film into a bag shape and seal it while filling.
Working principle:
Film conveying and forming: The roll film is loaded onto the film roll and conveyed to the forming tube through a series of rollers and guides. The forming tube forms the flat film into a cylindrical shape, preparing for the subsequent filling and sealing process.
Filling and sealing: As the pre-formed film roller moves forward, the filling nozzle accurately distributes the liquid product into the formed bag. At the same time, the sealing mechanism, which usually consists of upper and lower sealing rods equipped with heating elements, applies heat and pressure to seal the edges of the packaging bag. The sealing process is carried out on both sides of the packaging bag, hence the name "side sealing". Sealing parameters such as temperature, pressure and time can be precisely controlled to ensure a strong and leak-proof seal.
Maintenance:
Daily cleaning: After each production, thoroughly clean the internal and external surfaces of the machine, especially the filling area, sealing rod and film conveying path. Remove any residual liquid, dirt or packaging material to prevent contamination and potential failures in subsequent operations. Use a clean soft cloth or suitable cleaning agent to ensure that electrical components are not corroded by moisture.
Lubrication: The milk packing machine needs to regularly lubricate the moving parts of the machine, such as gears, chains and linear guides, with recommended lubricants. Proper lubrication reduces friction, wear and tear, ensures smooth operation and extends the service life of the machine. Please follow the manufacturer's guidance on lubrication intervals and lubricant types.
Seal component inspection: Regularly check the sealing strip for wear, damage or residue accumulation. Clean the sealing surface and replace any worn sealing elements in time to maintain stable sealing quality. In addition, check the heating elements and temperature sensors to ensure precise temperature control.
Film feeding system adjustment: Monitor the film feeding tension and guide mechanism to ensure smooth and consistent film feeding. Adjust the tension control device and check the film guide device for any wear or misalignment, which may affect the film forming and packaging quality.
Electrical system inspection: Check electrical connections, wiring and control system components for any signs of damage, looseness or malfunction. Ensure that the machine's control panel, sensors and actuators are functioning properly to maintain accurate operation and safety.
Conclusion:
The yogurt packaging machine plays a vital role in the efficient packaging of liquid products. By understanding its working principles and implementing appropriate maintenance measures, operators can optimize machine performance, ensure stable packaging quality and extend its service life. Regular maintenance can not only avoid potential production downtime, but also ensure the safety and hygiene of packaged products, meeting the needs of the packaging industry and the expectations of consumers.