It is understood that China's gravure printing machine is mainly used for the printing of paper packaging and flexible packaging. It is widely used in the printing of paper packaging, flexible packaging and decoration. Because of its good quality, bright colors and suitable for large-scale printing, it has always been used as The first choice for high-end printing markets such as aseptic packaging boxes, liquid milk cartons, cigarette boxes, and food packaging. China's banknotes, stamps, etc. are also printed by gravure printing machinery. This article will introduce you to the electronic axis gravure printing machine.
The gravure press blade should be placed at an appropriate height. The blade should be adjusted according to the printing speed. The printing speed is fast, the distance from the embossing point is far, the printing speed is slow, and the embossing point is closer.
The tension control of the unwinding tension zone of the gravure printing press is mainly performed by the uncoiler. Tension control is a main function of the uncoiler, so the control principle of the tension zone is consistent with the working principle of the uncoiler. The clutch, tension roller and tension controller form a closed-loop control system.
During the printing process, the paper is not easy to be separated, the paper on the delivery table is not properly received, or the paper on the paper feeding table is skewed and the overprinting is not allowed, etc., which may be caused by static electricity. To eliminate printing static electricity, a static eliminator is generally installed on the printing machine to ionize the air around the printing machine, thereby neutralizing the positive and negative static electricity on the paper. It is also possible to spray an appropriate amount of water mist around the gravure printing machine or on the back of the impression cylinder to eliminate static electricity on the paper. In addition, increasing the humidity in the printing shop is conducive to the elimination of static electricity.
Since the unwinding tension of the device adopts the tension controller + magnetic powder brake + tension sensor, and the winding tension is controlled by the frequency converter, the difficulty of the device lies in the control of the winding tension, and the tension is appropriate: the tension is too small, It will be slack when winding up; the tension is too large, and the material is easy to wrinkle when winding. In addition, since the diameter of the paper is continuously increased at the time of winding, if the rotation speed of the winding is kept constant, the winding speed of the paper becomes larger and larger, which is liable to cause the paper to be broken.
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