UV inkjet printer is actually named according to its system structure. We can understand it in two parts. UV means ultraviolet light. UV inkjet printer is an inkjet printer that requires ultraviolet light to dry. The working principle of the machine is the same as that of the piezoelectric inkjet printer. The following will introduce the principle and application fields of the UV inkjet printer in detail.
What is the principle of uv inkjet printer
1. It has hundreds or more piezoelectric crystals to control multiple nozzle holes on the nozzle plate respectively. Through the processing of the CPU, a series of electrical signals are output to each piezoelectric crystal through the driver board, and the piezoelectric crystals are deformed. , the volume of the liquid storage device in the structure will change suddenly, 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.
2. After the ink is ejected from the nozzle, the piezoelectric crystal returns to its original state, 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, the application of UV inkjet printer can print high-quality text, complex logos and barcodes and other information, and connect to the database to achieve variable data coding.
3. UV ink is generally composed of 30-40% main resin, 20-30% active monomer, and a small amount of photoinitiator and similar leveling agent, defoamer and other auxiliary agents. The curing principle is a complex. Photoreaction curing process: After the UV ink absorbs the corresponding violet light by the photoinitiator, free radicals or cationic monomers are generated to polymerize and crosslink, and the process of instantly changing from liquid to solid. After UV ink is irradiated with ultraviolet light in a certain range and frequency, it can be dried quickly. The UV inkjet printer has the characteristics of quick drying, good adhesion, no clogging of the nozzle, and easy maintenance.
Application fields of uv inkjet printer
UV inkjet printers are widely used in food, medicine, daily chemicals, label printing, card printing, packaging and printing, medical, electronics, hardware and other industries. Logo printing on flat materials such as leather and products such as bags and cartons.
Post time: Apr-27-2022