Coater is to apply liquid coating on the strip data and make it dry or solidified, so as to make the strip data present different effects.

In the coater, the guide roller plays the role of stability and transmission, and plays an insignificant role in the whole operation process of the coater. It is an essential structure. Usually, we should often check the related work of the guide roller.

Coater glue includes oil glue, water glue, hot melt glue and ray curing glue. The first two kinds contain 30% - 70% solid components, the solvent is organic solvent and water, and the last two kinds are 100% solid components. According to its composition, there are rubber glue, polyacrylate glue, thermoplastic elastomer glue and other polymer glue.

The coating machine comprises a frame, a back roller mechanism, a feeding roller mechanism, a hopper mechanism and a scraper which are arranged on the frame. The hopper mechanism of the product is of inverted trapezoidal cylinder structure, inverted triangular cylinder structure or semi cylinder structure, and the hopper mechanism is equipped with coating agent; the feeding roller mechanism of the product is soaked and fixed in the hopper mechanism; through changing the column shape of the feeding mechanism and improving the height of the feeding mechanism on the frame, the height of the feeding roller is not easy to be lower than the coating agent liquid level, and the coating efficiency is low The coating machine has the advantages of simple and reasonable structure, high and average coating efficiency and convenient clearing. The drying channel of the coater comprises a multi-stage cascade oven and a transmission and installation device for transmitting the coating data, each oven is provided with an air nozzle for blowing the coating data to the transmission and installation device, the air nozzle in the first stage oven is a unilateral air nozzle, and the unilateral air nozzle of the product is arranged in the oven along the transmission direction of the transmission and installation, and each unilateral air nozzle is arranged alternately The blowing direction of the air nozzle is different from or opposite to that of the transmission installation. The drying channel of the coater is separated by the single side blowing nozzle and the double side blowing nozzle to dry the coating materials. After the substrate is coated, the single side blowing nozzle is used to directly stop the hot air drying, which improves the drying efficiency of the slurry and ensures the average of the slurry.