In the adhesive products industry, the single-sided adhesive slitting machine is one of the core equipment in daily production. However, many operators encounter a headache – uneven winding. The uneven winding edges not only affect the beauty of the product, but also lead to subsequent rewinding, packaging difficulties, and even the scrapping of the whole roll of materials.
In this case, don't rush to doubt the accuracy of the equipment or think about overhauling. According to years of maintenance experience, more than 80% of the uneven winding problems are rooted in two key components. As long as these two places are investigated and dealt with first, most problems can be solved.
Uneven winding of the single-sided adhesive slitting machine? Check these two components first
1. Check the "pressure roller" - the first line of defense neatly wound
The pressure roller (also known as contact roller and lamination roller) is a component that adheres to the surface of the winding coil, which is to hold the material, discharge the air between the layers, and guide the material to be neatly wound.
Common fault manifestations:
• There are wear pits, adhesive layer peeling off or foreign objects on the surface of the roller
• Uneven pressure at both ends of the roller (tight and loose)
• The pressure roller shaft suffers damage that causes it to rotate inflexibly or sway
Analysis of the causes of irregularities:
When the surface of the roller is uneven or the pressure is unbalanced, the material will shift towards the side with less pressure during the winding process. For example, if the pressure on the left side is greater than on the right side, the material will gradually deviate to the right, eventually resulting in a "horn roll" with an uneven right end and a dented left end.
Workaround:
1. Clean the surface of the roller surface of the roller and debris
2. Check and adjust the cylinder or spring pressure at both ends to be consistent
3. Replace severely worn pressure rollers or bearings
4. Make sure that the roller axis is parallel to the rewinding shaft axis
Uneven winding of the single-sided adhesive slitting machine? Check these two components first
2. Check the "deviation correction system" - the key to automatic anti-deviation
Most of today's single-sided compound slitting machines are equipped with automatic correction systems, including edge probe sensors (photoelectric or ultrasonic) and actuators.
Common fault manifestations:
• Dust buildup or position shift of the sensor probe
• The actuator is stuck and slow to respond
• Improper setting of the guiding amplifier parameters
Analysis of the causes of irregularities:
After the correction system fails, even if the unwinding part of the material is correct, the winding part will gradually accumulate deviation errors. In particular, the single-sided adhesive itself is thin and soft, and it is difficult for the manual naked eye to intervene in time. If the winding end face is found to be "wavy" or "tower-shaped", it can basically be judged that there is a problem with the correction system.
Workaround:
1. Recalibrate the position by wiping the sensor probe with a clean, soft cloth
2. Check the actuator (e.g., screw, guide) and add lubricating oil
3. Adjust the correction sensitivity to avoid overshoot or response lag
4. Verify that the sensor is aligned with the edge of the material at the right distance
Uneven winding of the single-sided adhesive slitting machine? Check these two components first
Attached: Quick troubleshooting process
When uneven winding occurs, it is recommended to do the following steps:
1. Stop and observe: Check whether there is any obvious damage or glue accumulation on the surface of the roller
2. Manual pressure test: Feel whether the pressure on the material at both ends of the pressure roller is uniform
3. Empty operation: Turn on the correction system and observe whether the actuator responds normally
4. Eliminate section by section: If the above two are normal, then check the straightness of the winding shaft, tension control system and blade wear step by step
Written at the end
The uneven winding problem of single-sided adhesive slitting machine may seem complicated, but in fact, most of it stems from the two daily maintenance components of the pressure roller and the guiding system. Developing the habit of regular cleaning, inspection, and calibration can significantly reduce failure rates. The next time you encounter uneven winding, you may wish to start troubleshooting from these two parts, which can often save a lot of maintenance time and costs.
If the problem persists after checking these two areas, consider deeper reasons such as electrical parameter settings, rewinding shaft deformation, or tool holder parallelism. I hope this article can be helpful to your production practice.
