The working principle of the compound machine is as follows:

　　1. Preparation

　　First, install the guide rollers of the substrate according to the routing direction, adjust the adhesive in proportion, start the heating system of the oven, and then turn on the transmission motor when the corresponding set temperature is reached, so as to start the coating production.

　　2. Coating

　　The base material of the unwinding device must first pass through the anilox roller, glue and coating, and then pass through the drying channel for dry bath, that is, the coating process is completed.

　　3. Composite

　　After EPC gas-liquid correction, it enters the composite part and fits with the substrate of the second unwinding part to realize the composite process.

　　4. Cooling and winding

　　After cooling the coil, the overall production and processing of the substrate is completed. The following problems should be paid attention to during production.

　　(1) The flatness of the substrate is adjusted by adjusting the position of the deviation adjusting roller.

　　(2) The compound pressure between the compound rollers is adjusted by adjusting the relative spacing between the two compound rollers.

　　(3) By adjusting the tension clamp of clutch and brake, the traction tension and winding tension of substrate are controlled to make the machine run smoothly, so as to obtain good coating quality and composite effect.