First, brush type coater
Brush coater is an ancient coating equipment, first used in the 1850s to produce coated wall paper using China clay paint.There are three different types of brush coaters: round brush coater, blanket roller coater and blanket sleeve coater.Figure 1 shows an early use of a brush coating head.
Two, air knife coating machine
The advent of the air knife coater in the 1930s marked the birth of the modern paper coating industry.Air knife coater is to overcome the above shortcomings of brush coater, quickly promoted, resulting in a sharp increase in the output of coated paper.
Three, scraper type coater
The scraper coater appeared in the 1950s.Since then, the technology of scraper coater has been developed rapidly.According to the different feeding equipment, blade type and blade installation position, the blade coater is also divided into many kinds, such as hard blade blade coater, drag blade blade coater, soft blade blade coater, fountain type feeding blade coater, short resident blade coater, Bill blade coater, scraper roller coater, etc.
Four, roller coater
Roller coating is to use the coating roller to apply paint to the coating surface, the machine is mainly coated with this kind of coater.The amount of coating can be adjusted by measuring the pressure between the rollers, the pressure is strengthened, the amount of coating is reduced, and the amount of coating is reduced.Type of roller coater:
- Press roller type coating head
2, reverse roller coating head
3, transfer roller coating head
4, gravure roller coating head
Five, spray coating
Spray coating technology is a non-contact coating method, the use of controllable high-pressure spray technology can be applied to paper or cardboard on one or two sides (sizing).
Six, curtain coating
Multi-layer curtain coater can give inkjet printing paper surface three layer structure (bottom layer, absorption layer and top layer) only after a coating operation, and can obtain uniform coating on uneven paper surface
Seven, slit coating
A slit coating head comprises a coating liquid storage tank;Pump for the coating liquid storage tank in the coating liquid through the supply line pressure to the nozzle;The control part is used to control the work of the pump and nozzle. The pressure detection part is used to detect the pressure of the pipeline. When the pressure reaches the predetermined pressure condition, the nozzle removes the coating liquid.