Under the pressure of the ink supply pump, the ink passes through the ink path from the ink tank, adjusts the pressure, viscosity, and enters the spray gun. As the pressure continues, the ink is ejected from the nozzle, and the ink is subjected to the action of the piezoelectric crystal as it passes through the nozzle. Breaking into a series of continuous, equally spaced and identically sized ink droplets, the jet of ink continues to move downward through the charging pole, where the ink droplets are separated from the ink line. A certain voltage is applied to the charging pole, and when the ink droplet is separated from the conductive ink line, a negative electric charge proportional to the voltage applied by the charging pole is instantaneously carried. By changing the voltage frequency of the charging pole to be the same as the frequency at which the ink droplets are broken, each ink droplet can be charged with a predetermined negative charge. Under the pressure, the ink flow continues to move downward, from two separate The deflector with positive and negative voltage passes through the middle, and the charged ink droplets will deflect when passing through the deflector. The degree of deflection depends on the amount of charge. The uncharged ink droplets will not deflect and flow down to the recovery tube. Finally, it is recycled back to the ink tank through the recycling pipe. The charged and deflected ink drops fall at a certain speed and angle onto the object passing in front of the vertical nozzle.

Although the initial investment cost of UV inkjet printers is relatively high, due to its long service life, low maintenance costs, and good printing effects, after long-term use, UV inkjet printers can save a lot of costs for enterprises.