CAVI2COAT rotogravure and multi-roll processes coating machine
CAVI2COAT offers both the rotogravure and a number of multi-roll processes. Both engraved roller and multi-roll systems are pre-installed which allows you to switch effortlessly between dot and full surface coating. Under Rotogravure mode, the molten adhesive is put in a heated trough which is longitudinally in contact with the rotating gravure roll. In this manner, the cavities of the gravure roll are filled with adhesive. Under Multi-Roll mode, the molten adhesive lies between tow heated solid rollers.
Rotogravure mode: The adhesive is fed in plasticized form to a coating head. It is taken over by the engraved roll, the blank parts cleaned off with a doctor blade, the adhesive inside the cavities is transferred onto the substrate passing by on the pressure counter roll.
Multi-Roll mode: The adhesive is brought to the substrate to be coated either in the same direction of its motion (Direct Coating), against it (reverse Coating), or dipped-through (Both Side Coating). All systems provide full surface coating. Direct and Reverse Coating bring the adhesive on one face only for the substrate; the former is advised for high quantities of adhesive per gsm, whereas the latter allows more precision.
Another option is when the substrate passes through the gap of the coating and dosing roll. It is dipped through the adhesive and enables Both-Side-Coating.