The working principle and classification of inkjet printer

The inkjet printer uses charged ink particles, deflected by a high-voltage electric field, and shoots to the surface of the work object, and prints patterns and numbers on the surface of various objects.

It is a high-tech product of mechatronics. Since the ink droplet only changes in the vertical direction, the material to be printed and the nozzle must be moved relative to each other to form the data we want to print

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According to the work, cij printers can be classified as follows:

1. Continuous ink jet printers (continue ink jet printer)

Under the pressure of the ink supply pump, the ink passes through the ink pipe from the ink tank to adjust the pressure,

Viscosity, enter the spray gun, as the pressure continues, the ink is ejected from the nozzle. When the ink passes through the nozzle, it is broken into a series of continuous, Ink droplets with the same spacing and the same size are sprayed.

The jet ink stream continues to move downwards and is charged through the charging electrode, where the ink droplets are separated from the ink line

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Come on. A certain voltage is applied to the charging electrode, and when the ink drop is separated from the conductive ink line, it will be instantly charged with a negative charge that is proportional to the voltage applied to the charging electrode. By changing the voltage frequency of the charging electrode to make it the same as the breaking frequency of the ink droplets, each ink droplet can be charged with a predetermined negative charge. When it continues, the ink flow continues to move downwards, passing between the two deflection plates with positive and negative voltages respectively, and the charged ink droplets will deflect when they pass the deflection plates.

, The degree of deflection depends on the amount of charge. The uncharged ink droplets will not deflect, fly down, flow into the recovery pipe, and finally return through the recovery pipe.

Recycled in the ink tank. The charged and deflected ink drops fall onto objects passing in front of the vertical nozzle at a certain speed and angle.

2. Drop on demand inkjet printer (drop on demand)

Press that require inkjet technology are divided into three types, piezoelectric inkjet technology, pressure valve inkjet technology, and thermal foam inkjet technology. Each has different working principles.

(1) Piezoelectric inkjet technology: piezoelectric inkjet printer is also called high resolution inkjet printer or high resolution cij printer. On the integrated nozzle, 128 or more piezoelectric crystals

respectively control multiple nozzle holes on the nozzle plate, processed by the CPU, and output a series of electrical signals through the drive board For each piezoelectric crystal, the piezoelectric crystal produces a change

shape, so that the ink is ejected from the nozzle and falls on the surface of the moving object to form a dot matrix, thereby forming a text , Numbers or graphics. Then, the piezoelectric crystal is restored to its original shape. Due to the surface tension of the ink, new ink enters the nozzle. Because of the high density of ink dots per square centimeter, the application of piezoelectric technology can print high-quality text, complex logos and barcodes and other information.

(2) Solenoid valve type cij printer (large character inkjet printer): the nozzles consist of 7 groups or 16 groups high Precise and intelligent micro-shaped valve composition, when printing, the characters or images to be printed are processed by the computer motherboard, and a series of electrical signals are output to the smart through the output board. The micro solenoid valve opens and closes quickly. The ink relies on a constant internal pressure to form dots.

The ink dots form characters or graphics on the surface of the moving printed matter.

expiry date printing machine cij printer is generally used to date coding machine.

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Although there are various available in the market (such as date printing machine, expiry date printing machine, and date coding machine), recent study results have made this date printing machine cij printer a preferred cij printer choice of the people.