Because the traditional gravure printing machine has some defects in the printing process, these defects can be compensated if the electrostatic ink absorption device is installed on the gravure printing machine. Coating line will interpret the working characteristics and working principle of electrostatic ink absorption cots one by one.

Working principle of electrostatic ink absorption cot

1. Working characteristics of traditional plate cylinder and embossing cylinder

In gravure printing, the ink is stored in the net hole of the printing plate, and the printing press transfers the ink to the printing material through pressure. However, in this project, the ink cannot be fully transferred due to the viscosity of the ink and the adhesion of the ink to the printing plate, so white leakage will be formed on the printing material, especially in the printing dot, White leakage will be very obvious.

The dot of gravure printing machine is easy to be lost in the hierarchical printing machine and can not obtain satisfactory results. This is a congenital defect of gravure printing machine. It can be controlled from the aspects of paper, ink viscosity, printing pressure and tension, but it is difficult to fundamentally solve this problem.

2. Working characteristics of electrostatic ink absorption roller

The dot loss can be fully compensated by installing an electrostatic ink absorption device on the gravure press. Whether it is paper gravure printing or plastic gravure printing, it has high safety, more precise pulsating voltage, automatic locking and safety protection. If the integrated circuit is a closed circuit, the machine protection circuit will respond very quickly and cut off the circuit, so as to ensure the safety and reliability of the printing machine. Through the paper current monitoring system, the ink absorption of the printing press can be monitored and controlled from the system. It has a very wide paper adaptability. Its adaptability range is all web paper of 30 ~ 300g. It is widely used in high-quality gravure printing with high color requirements, such as stamps, trademarks, coins, cigarette packs, bonds, etc.

3. Working parameters of electrostatic ink absorption roller

Hardness 85 ~ 95; Rubber roller hardness tolerance + 3, same root hardness difference + 1; Circular runout tolerance ≤ 0.03m/m; The roll surface is free of impurities, bubbles, sand holes and mechanical damage, and the finish is Ra0.8; Insulation conductive voltage resistance. Under no circumstances shall the surface of the cot be impacted by external forces or sharp objects. It shall be handled with care. When using thinner to clean cots, towel and cotton yarn should be used to dry them and wipe them. They can be used only after the appearance is completely dry. The cots shall be placed vertically or stored by supporting the journal, and shall not be squeezed together. The commonly used specifications include two categories: roller with shaft and hollow roller.