Common Self-Adhesive Labeling Machine Faults and Solutions

A self adhesive labeling machine uses rolls of self adhesive label stock. During automatic bottle feeding, it continuously peels labels from the liner and applies them to bottles at the desired position. Self adhesive label material is a composite consisting of facestock material (such as paper or film), an adhesive layer, and a silicone-coated release liner (backing paper). This material is printed and die-cut to produce finished labels.

 

Today we discuss the common self-adhesive labeling machine failure problems and corresponding solutions.

 

1. Problem: Liner Breakage

During prolonged continuous operation, the liner may break, disrupting the labeling process and potentially halting the entire production line.

 

Solution:

Check that the quality of the liner meets specifications.

Regularly clean the machine's rollers and paper guides to prevent debris buildup that could hinder paper feeding.

Adjust the machine's tension settings to ensure stable and smooth paper transport.

These measures can effectively reduce breakage and improve machine efficiency.

 

 

2. Problem: Label Tracking Deviation

Labeling accuracy deteriorates beyond acceptable limits. Possible causes include: inaccuracies in the label itself, misalignment during label web travel, misalignment between the label web and product conveyance direction, slippage of the drive wheel, inaccurate product positioning detection, or incorrect label application over the applicator roller.

 

Solution:

If the label web is misaligned, loosen the traction mechanism, gently pull the label to allow self-correction, then tighten the side limit rings to secure alignment.

If the label web and product conveyance are not parallel, adjust the inclination of the labeling head to correct the deviation.

If the drive wheel slips due to wear or loose screws, tighten the locking screw(s).

Ensure product edge dimensional consistency through strict quality control to minimize labeling deviation.

 

 

3. Problem: Inaccurate Label Placement

Labels are applied off the intended position. Contributing factors may include unstable product conveying speed, improper label web tension, insufficient adjustment accuracy of the labeling head, or variations in product edge dimensions.

 

Solution:

Adjust the conveyor speed to ensure stable product flow matching the labeling speed.

Optimize label web tension settings to improve application accuracy through careful tuning.

Fine-tune the labeling head's position (including tilt and height) for better positioning precision.

Strengthen quality control during product manufacturing to ensure consistent edge dimensions.

 

 

4. Problem: Double/Multiple Labeling

The machine applies two or more labels in succession, primarily due to misadjusted label sensor (electric eye) sensitivity.

 

Solution:

First, adjust the sensor sensitivity according to the product manual.

If the issue persists, contact the manufacturer for technical support.

Also, check for label web deviation and adjust the sensor's position along the web for proper detection.