Pharmaceutical Industry – Calibration of Adhesive Labeling Machine Positioning: Application of Web Guiding Sensors
In the pharmaceutical manufacturing process, accurate labeling is critical to ensure product identification, traceability, and regulatory compliance. Adhesive labeling machines are widely used for applying labels to bottles, vials, and packaging. However, the precision of label placement largely depends on the calibration and alignment of the labeling system. One of the key technologies that enhance labeling accuracy is the use of web guiding (or edge guiding) sensors for position correction.
Importance of Position Calibration in Adhesive Labeling Machines
Misaligned labels can cause serious issues including incorrect product identification, scanning errors, and regulatory non-compliance. In addition, poor labeling appearance can affect the product’s market perception. Therefore, precise control of label placement is essential.
Role of Web Guiding Sensors in Position Correction
Web guiding sensors are devices that monitor the lateral position of the label web or the packaging material as it moves through the labeling machine. They detect deviations from the ideal path and send feedback signals to the control system to adjust the position accordingly.
Key functions of web guiding sensors include:
Real-time Position Detection: Continuously track the lateral movement of labels or substrates.
Automatic Correction: Signal actuators to adjust rollers or guides to correct misalignment.
Prevention of Label Skewing or Shifting: Ensures the label is applied straight and precisely.
Reduction of Waste: Minimizes mislabeling and material waste caused by off-center labels.
Types of Web Guiding Sensors
Ultrasonic Sensors: Measure the distance to the edge of the material using ultrasonic waves.
Infrared Sensors: Detect the contrast difference between the label edge and the background.
Mechanical Sensors: Use physical contact to sense edge position (less common in pharmaceutical due to contamination risks).
Camera-Based Sensors: Use image processing for precise edge detection.
Calibration Process for Label Positioning
Initial Setup: Define the correct label position and path within the control system.
Sensor Installation: Position sensors accurately near the label web or packaging edge.
Testing and Adjustment: Run the machine, monitor sensor feedback, and fine-tune actuator responses to ensure precise alignment.
Continuous Monitoring: Web guiding sensors continuously provide data to maintain alignment during operation.
Benefits of Using Web Guiding Sensors in Pharmaceutical Labeling
Enhances label placement accuracy and consistency
Improves product appearance and customer satisfaction
Reduces downtime and material waste
Ensures compliance with strict pharmaceutical labeling standards
Conclusion
The application of web guiding sensors for position correction in adhesive labeling machines is a vital technology in the pharmaceutical industry. It guarantees precise label application, supporting product safety, quality assurance, and regulatory compliance. Integrating these sensors into labeling lines helps manufacturers achieve higher efficiency and reliability.