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Technical principles and related knowledge of inkjet printers

The technical principle and related knowledge of the inkjet printer is a high-tech product integrating electromechanical integration by using the principle of charged ink particles to be deflected by a high-voltage electric field to print patterns, characters and numbers on the surface of various objects. The technologies involved in cij printers are: continuous inkjet technology, drop-on-demand inkjet technology, solenoid valve inkjet printers, thermal foam inkjet technology. The following briefly introduces these inkjet printer technologies: 1. Continuous inkjet technology Under the pressure of the ink supply pump, the ink flows from the ink tank through the ink pipeline to adjust the pressure, viscosity, and 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 by the action of the piezoelectric crystal. In a series of continuous ink droplets with equal spacing and the same size, the jetted ink stream continues to move downward and pass through the charging electrode to be charged. In the charging electrode, the ink droplets are separated from the ink line. A certain voltage is applied to the charging electrode, and when the ink drop is separated from the conductive ink line, it will instantly carry 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. Under the continuous pressure, the ink flow continues to move downward, from two separate The deflection plate with positive and negative voltage passes through the middle, and the charged ink drop will deflect when passing the deflection plate. The degree of deflection depends on the amount of charge. The uncharged ink drop does not deflect and flies down and flows into the recovery tube. , And finally return to the ink tank for recycling through the recovery pipeline. 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 printers with drop on demand technology are divided into three types, piezoelectric inkjet technology, pressure valve inkjet technology, and thermal foam inkjet technology. The working principle is also different. 1) Piezoelectric inkjet technology: piezoelectric inkjet printer is also called high resolution inkjet printer or high resolution inkjet printer. On the integrated nozzle, 128 or more piezoelectric crystals control the nozzle plate respectively. Through the processing of the CPU, a series of electrical signals are output to each piezoelectric crystal through the drive board. The piezoelectric crystal deforms, so that the ink is ejected from the nozzle and falls on the surface of the moving object. Dot matrix to form text, numbers or graphics. Then, the piezoelectric crystal returns to its original shape, and new ink enters the nozzle due to the surface tension of the ink. 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 inkjet printer (large character inkjet printer): The nozzle is composed of 7 or 16 groups of high-precision intelligent micro-shaped valves. When printing, the characters or graphics to be printed are processed by the computer motherboard. The output board outputs a series of electrical signals to the intelligent micro solenoid valve. The valve opens and closes quickly. The ink is ejected into ink dots based on the constant internal pressure, and the ink dots form characters or graphics on the surface of the moving printed matter. 3) Thermal inkjet technology (Thermal Inkjet Technolog) referred to as TIJ, uses a thin film resistor to heat less than 0.5% of the ink in the ink ejection area to form a bubble. This bubble expands at a very fast speed (less than 10 microseconds), forcing ink droplets to eject from the nozzle. The bubble continues to grow for a few microseconds, then disappears back to the resistor. When the bubble disappears, the ink in the nozzle retracts. Then the surface tension will generate suction. So what is the application neighborhood of the printer? The choice of inkjet printers in different industries. are used in many industries such as food, beverage, building materials, wire and cable, medicine, chemical industry, electronics, etc. Therefore, it is especially important to choose the most suitable inkjet printer for the product category. 1) Small character inkjet printer: It can be used in almost all industries, has a wide range of uses, and occupies 80% of the market. Unsuitable types: silicone rubber, Teflon, etc. 2) High-resolution inkjet printer: also known as high-definition inkjet printer, also known as DOD inkjet printer. It is suitable for a few industries such as plastic pipes and cartons. The high-resolution inkjet printer is mainly used for bar code printing. A good high-resolution printer can be equipped with a database and can be used for variable bar code printing. 3) Hand-held inkjet printer: suitable for large products such as plates and cartons and products without a fixed production line. The main feature is that it is more convenient to hold and print by hand. Disadvantages: the location of the inkjet is not fixed, and the appearance is beautiful. Poor. 4) : It is suitable for almost all industries. For the wine industry, the hot-filling line is very hot, and ink printers are not suitable. Laser printers can only be used for printing. However, when printing with a laser printing machine, the surface of the product will be damaged, so users should carefully consider when making a choice. 5) Intelligent inkjet printer: suitable for inkjet printing on the surface of metal, plastic, wood, aluminum foil, carton and building materials, and the operation is very convenient. 6) Supervisory code cij printer: For the use of various electronic supervisory code devices, it solves the problems of repeated barcodes, errors in barcodes, and unrecognized barcodes in the printing of drug supervision codes. Therefore, it is very important to identify the manufacturer of the printer. 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