Quantifying Surface Elevation Variance along Score Lines Using Optical Profilometry
Optical profilometry quantifies score elevation variance down to sub-micron resolution, identifying die wear and coating micro-fractures before carton assembly.
High Speed Folding Gluer
Assembly Machinery
Automated folding and gluing of flat die-cut carton blanks represents the final assembly phase in high-volume paperboard packaging lines. To achieve high throughput, a specialized machine called a high speed folding gluer processes thousands of blanks per hour, applying adhesive and folding them along pre-creased lines. This machinery must handle various board grades without marking the printed surface.
If the alignment is off by even a millimeter, the finished boxes will not run on automatic filling lines.
Mechanical Process
Blanks are fed individually from a stack at the inlet of the high speed folding gluer using friction belts or suction. As they move through the machine, extrusion nozzles apply hot-melt or cold glue along the flap lines. Folding hooks and twisting belts then fold the carton panels into place.
The final step involves a compression section where the glued joints are held under pressure to ensure a strong bond.
Operational Precision
Modern machines use optical sensors to inspect each box for proper glue application and fold accuracy. A high speed folding gluer operates at speeds up to 400 meters per minute, making real-time monitoring critical. Automatic rejection gates eject defective cartons without stopping the machine, which keeps the line running smoothly.