An inkjet printer (inkjet printer) is a software-controlled, non-contact inkjet marking system. It controls the internal gear pump or supplies the compressed gas from the outside of the machine to apply a certain pressure to the ink in the system, so that the ink is ejected through a tens of micrometer aperture nozzle. The crystal oscillation signal applied to the nozzle is used to split the continuous ink line to split into ink droplets with the same frequency, the same size, and a certain pitch. Then, the ink droplets are respectively charged when passing through the charging electrode, and the charged amount of the ink droplets is determined by the CPU. Control; After the detection electrode to detect the actual charge and phase of the ink drop is correct; Finally, the charged ink droplet deflection in the deflecting electrode to form the deflection field, ejected from the nozzle, respectively, hit the product surface in different locations, the formation of the required A variety of text, patterns and other logos. The ink droplets that have not been charged will enter the recovery tank and re-enter the ink circulation system inside the machine. Since continuous jet printing has a relatively high jetting speed, the jet printing distance of the continuous jet printing is usually far more than the jet printing distance (generally more than 10 mm), and the jet printing quality does not decrease. The placement of the nozzles allows for a great deal of choice. On-demand ink-jet printer (dropon demand) referred to as dod type. The industrial on-demand ink supply system nozzle is composed of a plurality of high-precision valves. When the characters are sprayed, the corresponding valve of the font is quickly opened and closed. The ink is ejected by a constant internal pressure to form characters or graphics on the surface of the movement. A digital signal produces a drop of ink on paper rather than a stream of ink. The latest dod nozzles, the color formed on the paper with a more precise collection of dots, is more similar to traditional offset printing. Therefore, in the four-color high-precision printing where the quality is the most important factor, dod is the best choice, and it can produce near-photographic quality. Dod's printing speed is between 100 and 300 feet per minute. Dod uses include wide-format printing, colorful icons for packaging, shopping-point displays, fabrics, and large-format logos. The use of laser jet printers, valve type inkjet printers, and valve type inkjet printers is the easiest to implement. In the past 20 years, they have been mainly used in outer packagings. Basically, a valve printing device includes a low pressure ink system. An electronically controlled cabinet and a sprinkler attached to the cabinet with a flexible conduit. Due to the simple mechanical structure, the valve type printing system is easy to establish. The system works best with water-based inks for printing on osmotic surfaces. Many valve-jet printer manufacturers produce non-permeable surface inks that dry faster than water-based inks, which can happen when blocking occurs. The time is still quite long — it takes about 15 to 30 seconds.

Piezoelectric inkjet printers Piezo inkjet printers The first type of pulse jet printing technology is piezoelectric printing. Simply put, the ink pressure in the nozzle must be low enough (or negative pressure) because it is ink. The surface tension keeps the ink in the nozzle. When printing is required, a pulse voltage is applied to the piezoelectric crystal, and the piezoelectric crystal is deformed, so that the volume of the nozzle ink chamber is reduced. Although the print resolution can be increased by tilting the print head (which sacrifices the print height), the print resolution is fundamentally determined by the nozzle pitch.

Deflection-type printers Deflection-type inkjet printers have been commercialized since the early 1970s and may be the most developed technology used in the production environment. Although the principle is quite simple, many control circuits have been combined for many years to ensure reliability and ease of use. There is a piezoelectric device behind the nozzle. When the voltage is applied, the device will generate displacement. This displacement will disturb the ink flow. If the frequency of the electrical signal applied to the piezoelectric device resonates with the ink jet frequency, the ink flow will break into The same size, the same pitch of ink droplets. In the position where the continuous ink flow breaks into a series of ink droplets, there is a charging electrode.

Pulsed inkjet printers The pulse jet printer is conceptually simple to print, but it is worth noting that it was not until the 1970s that the original patents were obtained, and although companies such as Canon and Hewlett-Packard did a lot of research Until the 1990s, cheap and reliable products were introduced to the market, so pulsed printing was not as simple as it seemed. From the office in the fixed printing distance to clean paper to the harsh environment of the factory. There are a lot of things to do in completing the inkjet coding.