The current organic volatiles (VOC) emissions from inks cause atmospheric pollution, and gravure presses are the most serious. It is a difficult problem in the world printing industry to completely solve the problem of emission of organic volatile matter (VOC) in gravure printing. Although water-based gravure inks are being developed and used in various countries around the world, water-based gravure ink printing can reduce organic volatile matter (VOC) emissions to a certain extent, but the effect of water-based gravure ink printing products, printing level, clarity, ink layer Thick, uniform ink, saturation, bright color, not as solvent-based ink, because the printing of water-based ink needs to be dried under high temperature conditions, it is difficult to print in plastic flexible packaging of food, daily chemical and pharmaceutical products. This article will introduce you to the use of gravure presses.

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.

Therefore, the ratio of the heating amount and the blowing amount of the drying box of the printing machine should be correct, which is the premise of ink drying. Secondly, if the printing machine oven runs on the printing plate, the printing ink will dry on the printing plate roller, the shallow mesh of the printing pattern will not be printed, and the transition color will be incompletely printed. Once again, the heat of the drying box is directly baked on the film, and the film is stretched. The wind will blow directly on the film and the film will shake. The film stretches and shakes, which affects the accuracy of the printing plate.

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