What are the common malfunctions of wet wipe packaging machines? (Part 2)

Second meaning: Under the pressure of the sealing knife, although the bag opening is sealed, a slight squeeze or tear will cause the seal to crack open again.

The main reasons for the loose-sealing issue in wet wipe dispensers are as follows.

(1) The wet wipe packaging machine has insufficient heat-sealing temperature—simply increasing the heat-sealing temperature slightly will resolve the issue.
(2) The surface of the heat-sealing blade is uneven. The heat-sealing blade consists of two separate pieces—upper and lower—between which a thermocouple is typically installed to monitor temperature transfer. The blade features three screws: the middle screw provides support and reinforcement for the blade, while the two outer screws are equipped with pressure springs and shims, primarily used to adjust the pressure applied by the heat-sealing blades. Each of the upper and lower blades also has two springs. The primary cause of the uneven blade surface is that the middle screw is installed at an angle rather than being perfectly horizontal.

Or Wet Wipe Machine The pressure spring on the upper heat-sealing blade is unevenly distributed. To resolve this issue, recalibrate the position of the middle screw to ensure it’s perfectly horizontal. If the upper and lower heat-sealing blades are unbalanced, adjust the pressure springs accordingly—tighten or loosen them until the pressure feels just right. Specifically, when the spring is pushed outward, the heat-sealing blade will drop downward; conversely, tightening the spring on the lower blade will cause the heat-sealing blade to move upward.

(3) Uneven pressure on the cold-press adhesive rollers of the wet wipe packaging machine can also lead to unreliable sealing, resulting in the same type of failure. The solution is similar to that for the first scenario.

There are three key points: When a peel test is conducted on the sealing area, half of the seal remains firmly intact while the other half has already separated. This indicates that the bag’s sealing quality still fails to meet standards, as the contents are highly likely to leak during storage and transportation due to external pressure. Such issues frequently occur when the composite liner material is OPP combined with blown PE.

The wet wipe packaging machine is responsible for two main reasons behind this sealing failure.

(1) Uneven heat-sealing knife pressure or uneven cold-press knife pressure—note that the adjustments for both the heat-sealing and cold-press knives are perfectly identical.
(2) The surface of the heat-sealing blade is not smooth enough; refer to the corresponding solution for the second type of sealing failure—poor seal integrity.

2. Wet Wipe Packaging Machine The fuse has blown.

The primary function of the sealer machine's motor is to drive the gearbox and ensure proper gear transmission throughout the system. Occasionally, when the sealer is first turned on, it emits a "squeaking" sound, preventing it from operating correctly—and in some cases, even causing the fuse on the live wire to blow. To troubleshoot this issue, start by verifying that the power supply is functioning properly. Next, disconnect the power source and use the resistance setting on a multimeter to check whether the switch is damaged. Additionally, carefully inspect the wiring and the motor itself for any signs of short circuits.

Typically, when the motor short-circuits, the windings burn out, or wires break, the fuse blows as soon as the sealing machine is started. Another reason for this failure is that the fuse rating is too low—simply upgrading to a higher-rated fuse will resolve the issue.