Talking about the classification and application of coating machine

Many people don't know what types of coating machines and their characteristics, let's take a look at the knowledge about coating machines.



1. Brush coating machine

The brush coater is the oldest coating equipment, originally used in the 1850s to produce coated wall paper using porcelain clay paint. There are 3 different types of brush coating heads: round brush coating head, blanket roll coating head and blanket coating head.

2. Air knife coating machine

The advent of the air knife coater in the 1930s marked the birth of the modern paper coating industry. The air knife coater overcomes the above-mentioned shortcomings of the brush coater and is quickly promoted, resulting in a sharp increase in the output of coated paper.

3. Doctor blade coating machine

The first patent for a knife coater appeared in the 1950s. Since then, the blade coater technology has developed rapidly. According to the different feeding equipment, blade type and blade installation position, the blade coating head is also divided into many types, such as hard blade blade coater, drag blade type blade coater, soft blade blade coater, fountain type upper Material knife coater, short residence knife coater, Bill knife coater, knife roll coater, etc.

4. Roller coater

Roll coating uses a coating roller to apply paint to the coating surface, and in-machine coating is mainly based on this type of coating machine. The coating amount can be adjusted by the pressure between the metering rollers, the pressure is strengthened, the throughput of the coating is reduced, and the coating amount is also reduced.

Types of roll coaters: 1. Press roll coating head 2. Reverse roll coating head 3. Transfer roll coating head 4. Gravure roll coating head

5. Spray coating

Spray coating technology is a non-contact coating method, using a controlled high-pressure spray technology to coat paper or cardboard on one or both sides (gluing).

6. Curtain coating

The multi-layer curtain coater can give the inkjet printing paper a three-layer structure (bottom layer, absorbent layer and top layer) with only one coating operation, and can obtain a uniform coating on the uneven paper surface

7. Slit coating

The slit coating head includes a coating liquid storage tank; a pump, which is used to pressure the coating liquid in the coating liquid storage tank to the nozzle through a supply pipe; a control part, which is used to control the operation of the pump and the nozzle , The pressure detection part is used to detect the pipeline pressure. When the pressure reaches a predetermined pressure condition, the nozzle removes the coating liquid.