DOD inkjet printer is the abbreviation of drop on demand (on-demand inkjet technology) inkjet printer, also known as automatic DOD inkjet printer or DOD automatic inkjet printer. DOD automatic inkjet printers have three different types of inkjet printers, namely piezoelectric inkjet technology inkjet printer, thermal foaming inkjet technology inkjet printer, and electromagnetic valve technology inkjet printer.
First, the piezoelectric inkjet technology inkjet printer, which is the most widely used high-resolution inkjet printer, is also called high-precision inkjet printer. The nozzle is controlled by 128 or more piezoelectric crystals to control multiple nozzles on the nozzle plate. Through the processing of the CPU, a series of electrical signals are outputted to the respective piezoelectric crystals through the driving board, and the piezoelectric crystal is deformed, and the ink is ejected from the nozzles and falls on the surface of the moving object to form characters, numbers or figures. Then, the piezoelectric crystal is restored to its original state, and new ink enters the nozzle due to the surface tension of the ink. Due to the high density of dots per square centimeter, piezoelectric technology can be used to print high-precision text, complex graphics and barcodes.
Second, the thermal foaming printer uses a thin film resistor to heat less than 0.5% of the ink in the ink ejection zone to form a bubble. The bubble expands at an extremely fast rate (less than 10 microseconds), forcing the ink droplets to eject from the nozzle. Advanced thermal foaming inkjet technology inkjet printer head, high pixel, high definition. The bubble continues to grow for a few microseconds and disappears back to the resistor. When the bubble disappears, the ink of the nozzle retracts. The surface tension then creates a suction force that pulls in new ink to replenish into the ink ejection zone. Thermal foaming inkjet technology is the most ideal choice for high-precision printing. The quality is very close to the quality of photographic quality, and the speed can reach 30-240 meters per minute.
Third, the solenoid valve technology inkjet printer, also known as the large character inkjet printer, consists of a number of high-precision valves. When the word is sprayed, the corresponding valve of the font type is quickly turned on and off, and the ink is sprayed by the internal constant pressure. Out, forming characters or graphics on the surface of the movement. A digital signal produces a drop of ink on the print material. Solenoid valve technology printers can be used for shopping point display cards, wide format printing, fabric and large format, packaging color icon logo.
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