Working principle and application fields of variable QR code inkjet printer

Two-dimensional code (two-dimensional bar code), as a brand-new information storage, transmission and identification technology, is widely used in industrial production. In recent years, my country has gradually established a product anti-counterfeiting and traceability information system in the field of production and circulation, such as seeds and pesticides. , Medicine, medical equipment, and food industries have implemented QR code traceability. Variable two-dimensional code inkjet printer refers to the inkjet equipment that can print variable two-dimensional code data in real time, usually UV inkjet printer. UV inkjet printer is a new type of inkjet equipment developed in recent years. Because of its ink characteristics, it is favored by manufacturers in various application industries. UV inkjet printer ink can be dried and cured immediately after being irradiated by ultraviolet curing lamp, with good stability. It can realize coding marking on various materials. Working principle UV inkjet printer is a high-resolution inkjet printer with a printing accuracy of >200DPI. It consists of hundreds or more piezoelectric crystals to control multiple nozzle holes on the nozzle plate, processed by the CPU, and then driven The board outputs a series of electrical signals to each piezoelectric crystal. The piezoelectric crystal deforms. The volume of the liquid storage device in the structure changes suddenly. The ink is ejected from the nozzle and falls on the surface of the moving object to form a dot matrix. Form text, numbers or graphics. After the nozzle ejects ink, 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, UV inkjet printers can print high-quality text, complex logos, barcodes, and QR codes. UV ink is generally composed of 30-40% main resin, 20-30% active monomer, and a small amount of photoinitiator and auxiliary agents such as leveling agent and defoamer. The curing principle is a complex photoreaction. Curing process: After the UV ink absorbs the corresponding violet light by the photoinitiator, it generates free radicals or cationic monomers, polymerizes and crosslinks, and instantly changes from liquid to solid. UV ink can be quickly dried after being irradiated by a certain range of area and a certain frequency of ultraviolet light, so that the ink has the characteristics of quick-drying, good adhesion, no clogging of the nozzle, and easy maintenance. Application field Variable two-dimensional code UV inkjet printer can print all kinds of variable data in real time, including barcode, two-dimensional code, date and time, shift group number, calculator, graph, table, database, etc. It is widely used in food, medicine, daily chemical, label printing, card making, packaging and printing, medical treatment, electronics, hardware and other industries. It can be used in flat materials such as aluminum plate, ceramic tile, glass, wood, metal sheet, acrylic plate, plastic, leather, etc. And printing on packaging bags, cartons and other products.