Gravure printing machine pre-printed color carton can get high-quality ink prints, because gravure printing overprinting precision is high, no more than 0.2mm, gravure printing can also be printed and varnished at one time, generally gravure printing after the print network cable can be Up to 300 lines, the amount of ink on the gravure printing is larger than other printing methods, up to 4.5~6g/m2, the printed ink is full, soft, bright and firm, and there is a sufficient drying system for each color after gravure printing, so Under the condition of printing on paper with high surface smoothness, gravure printing can achieve high ink printing quality. Most of the cigarette packs are products obtained by gravure printing on paper. At present, the paper gravure printing ink produced in the sea has been relatively mature. The water-based paper gravure ink that can satisfy the pre-printing of the corrugated board line has been manufactured in the sea, and can fully satisfy the friction of the 180°C high-temperature hot plate on the corrugated board production line. This article will introduce you to a fully automatic gravure press.
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 behind the impression cylinder to remove static electricity from the paper. In addition, increasing the humidity in the printing shop is conducive to the elimination of static electricity.
The equipment also adopts a new rigid scraper. By changing the support, lifting and adjusting structure of the scraper, especially the lower support mechanism, the rigidity and strength of the scraper are effectively improved, which not only can meet the high-speed printing of 300 meters per minute, but also solve from the perspective of equipment. Left and right color difference, shallow net scraping problem. The machine is stable and reliable during the speed increase process. The noise value of the equipment operation is less than 80 decibels, which is lower than the national standard requirements. The equipment completes the cutting action at a high speed of 300 meters per minute. The whole process is simple and beautiful, cutting the waste. The loss is 17 meters and the combined value of residual solvent is 2.5 milligrams per square meter, which is far below the national residual solvent standard. This equipment is mainly used for the printing of plastic flexible packaging materials such as food, medicine and daily chemicals.
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