Non Contact Laser Profiling Verification Baseline Setup in Board Converting
Establish an isolated vacuum datum and calibrate 405-nanometer sensors to eliminate sub-surface scattering errors during board crease verification.
Crease Depth Profiling
Deformation Measurement
Stiffness and resistance measurements along pre-scored lines on cartonboard help determine the runnability of packaging blanks during high-speed folding. Using crease depth profiling, laboratories measure the exact indentation made by creasing dies on the board. This specific assessment ensures that the carton folds easily without tearing or bulging.
It provides a non-destructive method for verifying machine setup during the conversion phase.
Instrumental Analysis
Laser or optical sensors capture the three-dimensional geometry of the crease to map its shape. Through crease depth profiling, technicians determine the ratio between the groove depth and the board thickness. This mathematical ratio dictates the force required to make the ninety-degree fold.
When the fold force is too high, folder-gluers cannot process the blanks correctly.
Production Calibration
Adjusting the pressure of the creasing rule helps maintain a uniform profile across the entire sheet. In high-volume packaging lines, crease depth profiling prevents costly machine jams and rejects by catching variations before printing begins. Consistency in the groove depth secures a square carton structure that stands straight on the retail shelf and runs smoothly through automatic filling equipment.
Without this calibration, minor shifts in board moisture or thickness would cause the folding forces to fluctuate, leading to crooked cartons and misaligned barcode panels on the retail shelves.