Glazing process is a technology and method to form a thin and uniform transparent bright layer on the surface of the printed matter by coating (or spray, printing) with a layer of transparent coating without packet. After leveling, drying and pressing, the technology and method of forming a thin and uniform transparent bright layer on the surface of the printed matter.

Due to the leveling of the coating on the printing surface, the smoothness of the printing surface is enhanced, the printing texture is more thick and plump, the color is more bright and bright, the luster and artistic effect of the printed matter is improved, and the appearance of the printed matter is enhanced. Improve the surface performance of printing, play a role in protecting text and text; Can improve the grade of goods, increase the added value.

Glazing process including glazing coating and pressure light two. The process of coating glazing is actually the process of coating (commonly known as glazing oil) applied on the surface of paper printed matter leveling and drying. The coating pressing light is the process of applying the pressing light coating on the surface of the paper printed matter with the ordinary glazing machine first, and then to the pressing light machine with the help of stainless steel light belt hot pressing and peeling after cooling.

Glazing process classification: according to the glazing coating can be divided into oxidation polymerization coating glazing, solvent volatile coating glazing, light curing coating glazing and thermal curing coating glazing; According to the product can be divided into the whole surface light, local light, extinction and art light; According to the glazing equipment used can be divided into: a separate glazing machine, the use of printing machine glazing and printing machine linkage glazing; According to the glazing method can be divided into: spray coating glazing, printing coating glazing and special glazing machine coating glazing; According to the printing input mode can be divided into manual paper feeding and automatic paper feeding.

Classification of glazing machine

Classification of glazing machine: glazing equipment can be divided into offline glazing equipment and online glazing equipment according to its processing mode.

Structure composition of glazing machine

It mainly comprises a coating device and a drying device, a paper receiving device, a transmission device and a body.

(a) coating device

The coating method is different, the coating device is different, the following three roller coating method as an example of the working principle of the coating device.

The three-ROLLER COATING device is composed of coating roller, lining roller, measuring roller, material trough, scraper, pressure regulating mechanism and glazing oil supply device.

1. Coating roll The coating roll is a steel roll with very low surface roughness, which is directly immersed in the material trough. In order to make the coating uniform, sometimes a feeding roller is added between the trough and the coating roller, the feeding roller is fed in the trough, and then the coating is transferred to the coating roller, and the coating roller is transferred to the printed matter, and a measuring roller is added to the coating roller, which will make the coating more uniform.

2. The function of the lining roll is to press the printed matter, so that the printed matter is in uniform and seamless contact with the coating roll during the coating process. The surface of the lining roller is coated with rubber. The body of the lining roller is made of seamless steel pipe, and the two ends are connected with the head and shaft head.

3. Measuring roll Measuring roll makes the coating layer uniform. The measuring roll is also made of steel, its structure is the same as the coating roll, and its diameter is smaller than the coating roll and the lining roll. When coating is needed on the printed matter, the glazing coating supply mechanism is transported between the lining roller and the measuring roller, and the printed matter is coated from the above material, and the measuring roller and the lining roller cooperate to evenly spread the coating to the surface of the printed matter.

4. The material trough supplies the glazing coating from below, the prepared coating is put into the material trough, and the coating is taken up by the coating roller and the feeding roller, and finally coated to the printed surface.

5. Scraper Scraper is used to remove excess paint from the coating roller. The structure of the scraper is basically the same as that of the intaglio printing scraper. It is mainly composed of scraper seat, blade and pressure mechanism. Blades are generally made of alloyed structural steel. Pressure mechanism between the blade and the coating roller pressure, pressure mechanism by gravity pull squeegee seat pressure, some by spring pull squeegee seat pressure, some by lead screw or other mechanical device pressure, hydraulic pressure, pneumatic pressure, etc..

6. Pressure regulating mechanism The pressure regulating mechanism is used to adjust the pressure between the coating roller and the lining roller, and between the lining roller and the measuring roller. If there is a measuring roll and a feeding roll in contact with the coating roll, the pressure between the coating roll and them should also be adjusted.

7. Glazing oil supply device glazing oil supply device is used for coating above the feed, it has a special storage tank, installed in the lower part of the machine, with a small centrifugal pump will paint suction to the feed site, the transmission pipeline has an adjustment valve, used to adjust the paint supply