How an inkjet printer works

Hot gas bubble inkjet technology
At present, there are two main categories of random inkjet technology: micro piezoelectric type and hot gas bubble type:
Random inkjet system ink is only sprayed when printing is needed, so it is also called on-demand.
In this way, the level of the ink drop is precisely controlled, and each time the ink drop is emitted, it has a perfect shape and an accurate flight direction.
Micropiezoelectric technology
Inkjet printers generally use hot gas bubble inkjet technology, through the ink in a short time of heating, expansion, compression, the ink is sprayed to the printing paper to form ink spots, increase the color of the ink drop is not chaotic, to achieve high speed, high quality printing. However, the structure of this inkjet printer is more complex than the random type: the ink needs to be pressurized, and the terminal should have a recovery device to recover and not intervene in the record.
The micro-piezoelectric inkjet system is equipped with a transducer on the ink nozzle, and the transducer is controlled by the print signal to control the ink injection. Applying an electric current to a crystal causes it to turn inward ****. The ability to control ink droplets is strong, and the color dots are reduced a lot, and the resulting ink dots do not have a wise tail, so that the printed image is clearer. Hot-bubble inkjet printers require an inkjet nozzle in each cartridge: this increases the cost of the cartridge.
Continuous inkjet technology is represented by charge modulation. The resting heat causes the ink to cool, causing the steam to condense and contract, thus halting the ink activity until the next steam is produced and an ink droplet is born.
Random inkjet technology
This continuous cycle of inkjet system. Can naturally high speed ink droplets, so the printing speed is high, you can use ordinary paper. For the deflection electrode, some systems use two pairs of vertical deflection electrodes to carry out two-dimensional deflection transformation of the ink droplet printing position. Some systems use multi-dimensional control of the deflection electrode, that is, multi-dimensional deflection transformation. Because in addition to the size of the ink drop, the shape of the ink drop, the consistency of the concentration will have a significant impact on the image quality, and the ink spot direction and shape generated by the ink at high temperatures are not easily controlled, so high-precision ink drop control is very important. When the current is restored, the crystals epitaxial back into a ready state to spray the next drop of ink. The two inkjet technologies are very different in principle. Different printing media can obtain high-quality printing results, but also easy to achieve color printing. The principle of hot bubble inkjet printing is to pack the ink into a very tiny capillary tube and quickly heat the ink to the boiling point through a tiny heating pad.
Compared with these two methods, hot bubble printing head because the ink is prone to chemical changes at high temperature, the nature is not chaotic, so the authenticity of the color will be affected to a certain extent; On the other hand, because the ink is sprayed by bubbles, the orientation and volume size of the ink particles are not easy to grasp, and the edge of the print line is easily uneven, which affects the print quality to a certain extent, which is its deficiency. However, the disadvantage of piezoelectric inkjet printers is that if the piezoelectric print head is damaged or obstructed, the entire printer needs to be repaired. When the current breaks, the crystal bounces back to its original position and shoots a tiny drop of ink through the nozzle. It is easy to achieve a high precision print quality of up to 1440dip, and the ink does not need to be heated when micro-piezoelectric inkjet, and the ink will not undergo chemical changes due to heat, so the requirements for ink are greatly reduced. The micro-piezoelectric printing head technology uses the characteristics of discharge when the crystal is pressurized to spray the ink without disorder at room temperature.
Continuous inkjet technology
How an inkjet printer works
If the inkjet printer is divided only from the printing format, it can be roughly divided into A4 inkjet printer, A3 inkjet printer, A2 inkjet printer; If it is divided from the use, it can be divided into ordinary inkjet printers and digital photo printers, and portable inkjet printers. According to the working principle and arrangement structure of micro-piezoelectric inkjet system transducer, it can be divided into: piezoelectric tube type, piezoelectric film type, piezoelectric sheet type and so on. The early inkjet printers and the current large format inkjet printers all use continuous inkjet technology, and the current popular inkjet printers generally use random inkjet technology.
The change of micro-voltage is used to control the injection of ink points, which not only avoids the shortcomings of hot gas bubble inkjet technology, but also can improve the quality of ink. The printing head uses a piezoelectric crystal at the rear of the miniature ink reservoir. The early inkjet printers and the current large format inkjet printers all use continuous inkjet technology, and the current popular inkjet printers generally use random inkjet technology. These two inkjet techniques... The so-called inkjet printer is to form text or images by spraying ink droplets onto the printing medium. For the purpose of recording, the vibratory signal of the oscillator is used to excite the natural ink droplets of the jet, and the size and spacing of the ink droplets are controlled.
The so-called inkjet printer is to form text or images by spraying ink droplets onto the printing medium. In this random inkjet system, in order to make up for this shortcoming, many random inkjet printers use a multi-nozzle method to improve the printing speed. Unrecorded ink droplets are recovered by catheter.v