glue lap unit of flexo folder gluer for corrugated box machine

glue lap unit of flexo folder gluer for corrugated box machine

The glue lap unit is used to seal the corrugated box together via the glue lap, also known as the manufacturer’s joint. The glue lap unit allows for the manufacturer’s joint to be bonded to the fourth panel of the box. The purpose of the joint is to hold a corrugated box together after production. A normal glue lap extends from the length of the box and is as high as the depth with cut angles at each end. Normal glue laps range in width from 1/4 to 1/2 inches. Extended glue laps have a longer width and are used for smaller boxes. Short glue laps are rarely used.

Several processes exist for applying the adhesive. The adhesive can be applied to either the lap itself or the panel that it is being adhered to. In some machines and processes, it is possible for the adhesive to be applied to both substrates . There are three primary processes that are used to apply the adhesive to the substrate in the flexo folder-gluer – wheel applicators, extrusion systems, and spray systems. Wheel applicators use a wheel, like one used in printing, to apply the adhesive. Glue is applied only to the tab in this method. Extrusion systems also use a wheel in the process. However, a control system is used in order todelegate when gluing occurs and when it does not. Spray systems use liquid sprayers to apply the adhesive, also with the assistance of a wheel. Spray systems provide great strength but are also more costly than the other two processes.

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