According to the working principle, inkjet printers can be divided into solid inkjet and liquid inkjet. The liquid inkjet method can be divided into bubble type and liquid piezoelectric type. The bubble technology is used to heat the nozzle to make the ink bubble and spray it onto the printing medium. Similarly, the thermal inkjet technology used by hp uses a thin film resistor to heat less than 0.5% of the ink in the ink ejection area to form a bubble. This bubble expands at a very fast speed (less than 10 microseconds), forcing ink droplets to eject from the nozzle. The bubble continues to grow for a few microseconds, then disappears back to the resistor. When the bubble disappears, the ink in the nozzle retracts. blue film inkjet printer Then the surface tension will generate suction, pulling new ink to replenish the ink ejection area. Thermal inkjet technology is structured by such an integrated cycle technology program. In the piezoelectric inkjet technology, the ink is ejected from a nozzle similar to the thermal inkjet technology, but the ink droplets are formed by reducing the area where the ink is ejected. The shrinkage of the ejection area is controlled by applying a voltage to one or more piezoelectric plates in the ejection area. Because the ink is prone to chemical changes at high temperatures and its properties are unstable, the authenticity of the printed colors will be affected to a certain extent; the micro-piezo print head technology uses the discharge characteristics of the crystal when it is pressurized, and it is stable at room temperature. Eject the ink. It has the characteristics of strong control of ink droplets, easy to achieve high-precision print quality of 1440dpi, and the micro-piezoelectric inkjet does not need to be heated, and the ink will not undergo chemical changes due to heat.
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