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Classification and comparison of advantages and disadvantages of industrial ink jet printers

by:Leadtech Coding     2021-12-04

Industrial ink jet printers refer to ink jet printers used in industrial assembly line production and controlled by a single-chip microcomputer, including small character jet printers, thermal foam jets Printers and UV ink jet printers, etc., they are widely used in food, beverages, daily necessities, medicine, building materials, pipe industry, machinery, electronics, wires, cables, packaging and other industries.

1. Advantages and disadvantages of small character inkjet printers

Small character inkjet printers are common continuous inkjet printers (I.e. CIJ inkjet printer), its working principle is that the ink enters the spray chamber under pressure, and the spray chamber is equipped with a crystal oscillator. Through vibration, the ink is ejected from a nozzle with a very small aperture (usually 60 microns). At fixed intervals, through CPU processing and phase tracking, some ink dots passing through the charging electrode are charged with different electric cores. After passing through a high-voltage magnetic field of several thousand volts, they have different offsets, flying out of the nozzle and landing on the moving The surface of the product forms a dot matrix to form words, numbers or graphics.

The printing speed is fast, and a single line printing can reach 300 meters per minute. Taking the date printing of mineral water bottles and beverage bottles as an example, the printing speed of small characters can reach every minute About a thousand bottles.

Compared with thermal foaming inkjet printers and UV inkjet printers, the printing accuracy of small character inkjet printers is much lower, with a resolution of 32 pixels. Or 48 pixels, it is obvious to see bitmap fonts intuitively, rather than solid fonts.

The printing height is limited. The printing height of the small character inkjet printer is generally between 1mm-15mm, and the ink needs to be added with thinner, even when it is stopped, Ink will also evaporate less.

2. Advantages and disadvantages of thermal foam printer

The nozzle of the thermal foam cij printer (TIJ inkjet printer) adopts semiconductor thin film technology, and uses laser process and high-precision deep layer technology to form a number of nozzle holes with a diameter of about 50μm. These nozzle holes are arranged in high density. The thin-film resistor is energized and heated to produce countless tiny bubbles in the ink. The bubbles gather into large bubbles at a very fast speed and expand, forcing ink droplets to be ejected from the nozzle; when the resistor is without voltage, the heating is stopped and no ink droplets are ejected.

The initial investment of the thermal foaming cij printer is low, but the cost of consumables is high in mass production, and in terms of printing quality, because the thermal foaming inkjet printer is in use It is necessary to heat the ink, and the ink is prone to chemical changes at high temperatures, its properties are unstable, and the color authenticity will be affected to a certain extent.

The thermal foaming inkjet printer and the UV inkjet printer are both high-resolution cij printers with high printing resolution. However, nozzles using thermal foaming technology work in a high temperature and high pressure environment for a long time, the nozzles are prone to corrosion and the nozzle life is short.

3. Advantages and disadvantages of UV inkjet printers

The working principle of the UV cij printer is the same as that of the piezoelectric inkjet printer. It has hundreds or more piezoelectric crystals to control multiple nozzle holes on the nozzle plate, processed by the CPU, and output through the drive board. A series of electrical signals give each piezoelectric crystal, the piezoelectric crystal deforms, the volume of the liquid storage device in the structure changes suddenly, and the ink is ejected from the nozzle and falls on the surface of the moving object to form a dot matrix, thereby forming text , Numbers or graphics.

UV inkjet printer combines the advantages of inkjet printing technology and ultraviolet curing technology, not only has the convenience of variable data online inkjet technology, but also has high adhesion UV The efficiency advantage of curing, UV ink can be quickly dried after being irradiated with a certain range of ultraviolet light at a certain frequency, so that the ink has the characteristics of quick-drying, good adhesion, no clogging of the nozzle, and easy maintenance.

The disadvantage of the UV inkjet printer is that the initial investment cost is relatively high. The market price of the whole machine ranges from 40,000 to 100,000. It is a new type of inkjet equipment developed in recent years. In terms of technical maintenance, non-professional engineers are difficult to control, and improper operation can cause damage to high-precision nozzles.


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