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The coating machine is mainly used for the surface coating process of film, paper, etc. This machine coats the roll of the substrate with a special function of glue, paint or ink, and then winds up and winds up. It adopts a special multi-functional coating head, which can realize various forms of surface coating . The rewinding and unwinding of the coating machine is equipped with a full-speed automatic film-bonding mechanism, and the PLC program tension closed-loop automatic control. Today, China Plastics Industry website - Jiuzhi Plastics Co., Ltd. tells you about the 7 major categories of coating machines, as follows:
Brush type
The brush coater is the oldest coating equipment originally used in the 1950s to produce coated wall paper using china clay coatings. There are three different types of brush coating heads: a round brush coating head, a blanket roll coating head, and a blanket coating head. Figure 1 shows an early application of a brush coating head.
2. Air knife
The advent of air knife coaters in the 1930s marked the birth of the modern paper coating industry. The air knife coater overcomes the aforementioned shortcomings of the brush coater and is rapidly being promoted, resulting in a sharp increase in the production of coated paper.
3. Scraper
The first scraper coater patent appeared in the 1950s. Since then, the blade coater technology has been rapidly developed. According to the feeding equipment, the type of scraper and the mounting position of the scraper, the scraper coating head is also divided into many types, such as hard blade scraper coating machine, drag knife scraper coating machine, soft blade scraper coating machine, fountain type. A blade coater, a short-residence blade coater, a billet coater, a scraper coater, and the like.
4. Roller
Roll coating is applied to the coated surface by a coating roll, and the inner coating is mainly such a coating machine. The amount of coating can be adjusted by the pressure between the metering rolls, the pressure is increased, the throughput of the coating is reduced, and the amount of coating is reduced. Type of roll coater:
1. Press roll coating head
2, reverse roll coating head
3, transfer roller coating head
4, gravure roll coating head
5. Spray coating
Spray coating technology is a non-contact coating method that uses a controlled high pressure spray technology to coat paper or paperboard on one or both sides (sizing).
6. Curtain coating
The multi-layer curtain coater can impart a three-layer structure (bottom layer, absorbing layer and top layer) to the surface of the inkjet printing paper with only one coating operation, and can obtain a uniform coating on the uneven paper surface.
7. Slit coating
The slit coating head comprises: a coating liquid storage tank; a pump for pressing the coating liquid in the coating liquid storage tank to the nozzle through the supply line; and a control portion for controlling the operation of the pump and the nozzle The pressure detecting portion is configured to detect the line pressure, and the nozzle removes the coating liquid when the pressure reaches a predetermined pressure condition.
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