Small class | ink-jet printing the basis of the principle of knowledge

With the continuous development of science and technology, ink is no longer just used for writing, painting and expressing emotions, but everywhere in our lives.Did you know that the beautiful prints on our clothes, posters, banners, and mugs are all created with ink ~~ and this applies to our digital inkjet printing technology!

（http://www.obooc.com/）

The following is a small edition to summarize some of the discussion on the resolution of digital printing.

1. 连续喷射式CIJ ( continuous Ink Jet)

By applying high frequency vibration pressure to the printing ink, the printing ink is ejected from the nozzle to form a uniform and continuous microdrip.An electric field which changes synchronously with the graphic photoelectric conversion signal is arranged at the nozzle.

The ejected droplet is selectively charged in the charging electric field. When the droplet flow continues to pass the deflection electric field, the charged droplet is deflected under the action of the electric field,  and the uncharged droplet continues to keep a straight flight state.

Droplets flying in a straight line cannot reach the substrate to be printed and are recovered by the collector. Charged droplets are sprayed onto the substrate to be printed.

（http://www.obooc.com/）

2. 按需要喷射式DOD(Drop on Demand)

When printing is needed, the system applies high-frequency mechanical force and electromagnetic thermal shock to the ink in the nozzle, so that tiny droplets are ejected from the nozzle and sprayed to the set pattern by computer control.

On demand jet type is the most widely used thermal inkjet technology,  it is relying on heat pulsation to produce ink drops, by computer control of a heating resistance wire to the specified temperature, resulting in printing ink vaporization (fog) from the nozzle after ejecting.

Another DOD technology is the piezoelectric injection system, which is controlled by a computer to impose a potential on the piezoelectric material, so that the piezoelectric material in the direction of the electric field compression, in the vertical direction of expansion, so that the printing ink ejected.

（http://www.obooc.com/）

（http://www.obooc.com/）