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Working principle of UV DOD digital inkjet printer

Views: 200     Author: Site Editor     Publish Time: 2021-10-20      Origin: Site

Working principle of UV DOD digital inkjet printer

UV digital inkjet printer refers to the piezoelectric inkjet printer that uses UV ink for inkjet printing. UV ink is an ink that needs ultraviolet irradiation to dry. UV is the abbreviation of ultraviolet, which is translated into ultraviolet in Chinese. UV inkjet printer uses UV ink for inkjet printing. UV ink is an ink that needs ultraviolet irradiation to dry, In addition, its printing resolution exceeds 200dpi, so it is also called high resolution UV inkjet printer.

 

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The working principle of UVLED digital inkjet printer


 

The working principle of UVLED digital inkjet printer

The working principle of UV inkjet printer is consistent with that of piezoelectric inkjet printer. It has hundreds or more piezoelectric crystals to control multiple spray holes on the nozzle plate respectively. Through the processing of CPU, a series of electrical signals are output to each piezoelectric crystal through the driving plate. The piezoelectric crystal is deformed, and the volume of the liquid storage device in the structure will change suddenly, The ink is ejected from the nozzle and falls on the surface of the moving object to form a dot matrix, so as to form words, numbers or graphics.


After the ink is discharged from the nozzle, the piezoelectric crystal returns to its original state. Due to the surface tension of the ink, new ink enters the nozzle. Because the ink dot density per square centimeter is very large, the application of UV inkjet printer can print high-quality text, complex logo, bar code and other information. Connecting to the database can realize variable data inkjet.

UV LED Digital Printer

UV ink is generally composed of 30-40% of the main resin, 20-30% of the active monomer, and a small amount of photoinitiator, leveling agent, defoamer and other additives. Its curing principle is a complex photoreactive curing process: after the photoinitiator absorbs the corresponding purple light, UV ink generates free radicals or cationic monomers, polymerizes and crosslinks, and instantly changes from liquid to solid. UV ink can be dried quickly after it is irradiated by ultraviolet light in a certain range and frequency. UV inkjet printer has the characteristics of fast drying, good adhesion, no blockage of nozzle, easy maintenance and so on.

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