High resolution UV inkjet printer working principle and ink curing characteristics

High resolution UV cij printer refers to a piezoelectric cij printer that uses UV ink to print. UV ink is a kind of For dry ink, UV is the abbreviation of Ultraviolet, which is translated as ultraviolet in Chinese. Because its printing resolution exceeds 200DPI, it is also called high-resolution UV cij printer.

1. Working principle

The working principle of the high-resolution UV inkjet printer is the same as that of the piezoelectric inkjet printer. It has hundreds or more piezoelectric crystals to control multiple nozzle holes on the nozzle plate. Through CPU processing, a series of electrical signals are output to each piezoelectric crystal through the drive board. The piezoelectric crystal deforms and the structure The volume of the liquid storage device will suddenly change, and the ink will be ejected from the nozzle and fall on the surface of the moving object to form a dot matrix, thereby forming characters, numbers or graphics.

After the nozzle discharges ink, the piezoelectric crystal returns to its original shape, and new ink enters the nozzle due to the surface tension of the ink. Because of the high density of ink dots per square centimeter, UV cij printers can be used to print high-quality text, complex logos and barcodes, and the database can be connected to achieve variable data coding.

2. Ink curing

UV ink generally consists of 30-40% main resin and 20-30% activity It is composed of monomer, a small amount of photoinitiator and auxiliary agents like leveling agent, defoamer, etc. The curing principle is a complex photoreactive curing process: UV ink is freely generated after the photoinitiator absorbs the corresponding violet light A process in which radical or cationic monomers undergo polymerization and crosslinking, and instantly change from liquid to solid.

UV ink can be quickly dried after being irradiated with a certain range of ultraviolet light at a certain frequency, so that the ink has fast-drying properties, good adhesion, and does not block the nozzle. Easy to maintain and other features, high-resolution UV cij printers are commonly known as UV cij printers because of their ink characteristics.

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