7 Effective Strategies丨How To Prevent Tissue Paper Sheet Wrinkling Before Into Paper Sheeter Machine
7 Effective Strategies丨How To Prevent Tissue Paper Sheet Wrinkling Before Into Paper Sheeter Machine
When cutting multiple reels of lightweight paper material(thin paper) on a paper roll sheeting machine, wrinkling can sometimes occur before entering the cutting unit. Below are 7 effective strategies to prevent these problems:
1. Tension control imbalance
Cause: Inconsistent tension on multiple rolls of thin paper can cause some of the paper to be slack or too tight. Rolls with too much tension may be pulled off, while rolls with too little tension may pile up.
Solution:
Check the sheeting machine's tension control system (e.g. magnetic particle brake, pneumatic brake, etc.) to ensure that the tension parameters are independently adjustable and synchronised for each roll.
Reduce tension values for thin paper characteristics to avoid overstretching.
Use tension sensors for real-time monitoring and automatic adjustment.
For example, CHM Paper sheeter machine is equipped with an advanced auto tension control system, which can prevent this problem.
chm paper sheeter unwind stand auto tension control system
2. Alignment deviation or wear of paper guide rolls
Cause: Guide rolls that are not parallel, have worn surfaces or are dusty will cause the paper to go out of alignment with the slitting knives.
Solution:
Calibrate all guide rolls for parallelism and levelness to ensure straightness of the paper path.
Clean or replace worn guide rollers and add a non-slip coating (e.g., rubber) if necessary.
Add a deflection correction device (EPC system) to correct the paper position in real time.
For example, CHM Paper sheeter machine is equipped with advanced EPC system, which can reduce paper waste by aligining paper web edges.
EPC(web guide system or edge paper control) Sensor
3. Poor condition of slitting knives
Cause: Blade dullness, installation angle deviation or knife spacing does not match the width of thin paper, resulting in poor cutting.
Solution:
Replace or sharpen the blade regularly to maintain sharpness.
Check whether the spacing of the knife shaft matches the slitting specifications to ensure that the blade cuts vertically.
Adjust the pressure between the bottom roller and the blade when using a round knife to slit (especially for thin paper, the pressure should be lowered).
For example, CHM Paper sheeter machine advanced cutting technology developed over 20 years, which greatly reduced the wear of cutter and improved the cutting accuracy.
4. Paper roll installation and fixing problems
Reason: The paper roll is not aligned, the axis is shifted or not firmly fixed, resulting in lateral displacement when slitting.
Solution:
Check that the tapered chuck at the unwind end of the roll is appropriate for the size of the thin paper core to avoid wobbling.
5. Paper characteristics and static electricity
Cause: Thin paper is easily affected by humidity and static electricity, resulting in adhesion or adsorption on the guide roll.
Solution:
Control workshop humidity (recommended 50%-60%) to reduce static electricity generation.
Install static eliminators (e.g. ionisation bars) in the unwind and paper guide paths.
Select guide rolls with moderate surface smoothness to avoid paper adsorption.
6. Synchronisation of slitting speed and equipment
Cause: The slitting speed is too high resulting in a lag in the response of the tension system, or the speed of the haul-off rollers and slitting knives are not synchronised.
Solution:
Reduce the slitting speed, and gradually debug to the limit of stable operation of thin paper.
Check the synchronisation of the transmission system (e.g. gears, belts) to ensure that the traction and slitting units match.
7. Equipment maintenance and operation specification
Cause: Dust accumulation, insufficient lubrication or wrong setting of operating parameters.
Solution:
Regularly clean confetti and dust from guide rollers, knives and sensors.
Lubricate the bearings and transmission parts as required by the manual.
Train operators to adjust parameters (e.g. tension, pressure, speed) according to paper thickness.
Summarise the troubleshooting process
Check the tension system: make sure that the rolls are independently controllable and that the values are reasonable.
Calibrate guide rolls and guiding devices: eliminate mechanical alignment problems.
Verify knife condition: replace dull knives and adjust pressure.
Test low-speed operation: Observe whether the pile-up is relieved, and gradually increase the speed for debugging.
Environment and static control: humidity, cleanliness, static elimination.
