Origin and classification of the most popular inkj

The origin and classification of ink-jet printing

NK jet printing (ink-jet printing) first developed in 1878. In 1951, Siemens applied for a patent for the technology of transforming liquid ink into ink droplets. In 1964, with a special machine, the size and ejection rate of ink droplets can be controlled. This is the prototype of ink-jet machine. Until 1967, Hertz developed a continuous ink-jet printer, This is the continuous ink jet printing currently used in industry. Siemens launched piezoelectric (piezoelectric) dro on demand ink jet printing in 1972, Canon launched thermal dro on demand ink jet printing in 1979, but it is called bubble ink jet printing. HP also launched thermal dro on demand ink jet printing in 1984. These are the development history of ink jet printing

ink jet printing classification

ink jet printing is generally divided into two categories, one is continuous (continuous) and the other is dro on demand (controllable jet printing); Continuous is mainly used in industry, such as labels, tickets, cartons and other rough surfaces. Gold consists of plastic molds, plastic machinery manufacturing surfaces and plastic surfaces. The advantage is that the speed is fast, and the smoothness of the material surface is not very important. 2 Indication error - there is a considerable distance between the recorded or displayed measured value of the deformation value of the sample and the actual value of the measured value, so the thickness of the printed material is not affected. The disadvantage is that the resolution is not very high, and it is usually used on the surface of rough materials that do not pay much attention to the resolution. At present, continuous has developed binary deflection and multiple deflection, both of which use the principle of voltage to produce deflection, The former supplies ink according to the way of inkjet when it is charged and not when it is not charged. The latter can control the direction of deflection after the ink drops are ejected through the high-pressure deflector, and more accurately reach the place where inkjet is needed. The uncharged ink drops are led into the ink guide slot, which can be recycled and reused

digital ink-jet printing is also called color ink-jet printing. It inputs the required pictures and texts into the computer through input devices such as scanners or digital cameras. After being processed by the electronic color separation system, the computer controls the ink-jet system to spray dyes or pigments directly onto the fabric for printing. According to the results of long-term experiments of ink-jet printing, ink-jet printing can be divided into continuous ink-jet and on-demand ink-jet

1. Continuous jet CIJ (continuous LNK jet)

the principle of continuous jet is to spray the ink from the nozzle to form a uniform and continuous micro droplet flow by applying high-frequency oscillation pressure to the ink. An electric field that changes synchronously with the graphic photoelectric conversion signal is set at the nozzle. The ejected droplets are selectively electrified in the charging electric field. When the droplet flow continues to pass through the deflection electric field, the charged droplets deflect under the action of the electric field, and the uncharged droplets continue to fly in a straight line. The droplets flying in a straight line cannot reach the substrate and are recycled by the liquid collector. Charged droplets are sprayed onto the substrate to complete printing

2. On demand jet do customers in any industry will benefit from Altair's deep-rooted knowledge of composite material design in products and its close integration with Optistruct and multiscale designer. The working principle of the on-demand jet printing system is that when printing is needed, the system applies high-frequency mechanical force and electromagnetic thermal shock to the ink in the nozzle to form tiny droplets to spray from the nozzle, The spray is controlled by the computer to the set pattern. The most widely used on-demand jet technology is thermal inkjet technology, which relies on thermal pulsation to produce ink droplets, and the computer controls a heating resistance wire to the specified temperature, causing the ink to be gassed (fogged) and then ejected from the nozzle. Another DOD technology is the voltage injection system, which is controlled by the computer to impose a potential on the conductive material, so that the conductive material will compress in the direction of the electric field and expand in the vertical direction, so that the ink will be ejected

inkjet printing requires not only high-precision nozzle technology and high-precision control technology, but also ink (ink) with high purity, high concentration, high fastness and high stability to match it, so it can be used

3. The process of digital ink-jet printing

the process of ink-jet printing depends on the ink used. Generally, acid dyes are mainly used for carpet printing, disperse dyes are mainly used for polyester fabrics, and reactive dyes are mainly used for cotton fabrics. The following is an example of the ink-jet printing process of cotton fabric with reactive dye ink. Fabric pretreatment prepress drying inkjet printing prepress drying steaming (100 ~ 102 ℃, 8min) washing and drying