About random ink jet
Random ink-jet system in which the ink is only sprayed when printing is needed, so it is also called on-demand. Compared with the continuous type, it has the advantages of simple structure, low cost and high reliability. However, due to the influence of jet inertia, the jet velocity of ink drops is low. In this random inkjet system, in order to make up for this shortcoming, many random inkjet printers adopt the method of multiple nozzles to improve the printing speed.
Random ink - jet technology mainly includes two categories: piezoelectric and bubble
Inkjet printers generally use hot air bubble inkjet technology, through the ink in a short time of heating, expansion, compression, the ink will be sprayed to the printing paper to form ink spots, increase the stability of ink drops of color, to achieve high speed, high quality printing.
Because in addition to the size of the ink droplet, the consistency of the shape and concentration of the ink droplet will have a significant impact on the image quality, and the direction and shape of the ink dot produced by the ink at high temperature is not easy to control, so high-precision ink droplet control is very important.