Leakage in a three-side-seal liquid packaging machine is usually related to sealing temperature, sealing pressure, packaging material, or the condition of equipment components. The problem can be solved through targeted inspection and adjustment.
Improper sealing temperature
If the temperature is too high, the packaging material may overheat and become too thin. If it is too low, the seal may not fuse completely. The temperature should be adjusted gradually according to the material characteristics, and the sealing effect should be observed through multiple test runs until the appropriate range is determined.
Uneven sealing pressure
Insufficient or excessive pressure can affect the bonding quality of the packaging material. The pressure adjustment device should be checked, and testing tools can be used to assist measurement. Fine adjustments should be made until the pressure is even and the seal is consistent.
Packaging material problems
Uneven thickness, pinholes, or tiny cracks in the material can cause weak seals. Qualified packaging materials should be used instead. When purchasing, choose reliable suppliers and strictly inspect appearance and thickness.
Worn sealing blade
After long-term use, the sealing blade edge may become worn, reducing heat-sealing performance. The blade should be inspected regularly and replaced in time when wear is found. For certain non-standard sealing blades and mounting bases, Hansheng Automation provides custom machining based on equipment drawings to help restore seal integrity.
Unstable machine operation
Equipment vibration, loose parts, or excessively high running speed can affect sealing quality. Loose parts should be tightened, and the operating speed should be adjusted according to material thickness and bag length to keep the machine running smoothly.
