The working performance of the gravure printing machine mainly includes three indexes such as overprint accuracy, ink color uniformity and productivity.
1. Overprint accuracy: In the process of overprinting, the accuracy of imprint overlap is one of the main technical indicators of the work performance of the gravure printing machine. In the process of chromatic printing, paper conveying, handover and printing, etc., should be guaranteed to be in the specified position at low speed or high speed. For fine prints and color printing, this is even more important. This requires that the transmission system of the gravure printing press, the position and time of paper transfer and the transmission accuracy of the printing plate and the imprinting mechanism, etc. should meet certain requirements. Therefore, when we analyze the gravure printing machine, we must focus on understanding the various links related to the overprint accuracy, and grasp its characteristics and its role.
2. Ink uniformity: Ink uniformity refers to the consistency of the ink layer thickness of printed products and the clarity of ink marks. This is another indicator to measure the quality of printing, and it is also an important content for evaluating the working performance of gravure printing machines. No matter which printing method is used, to print clear and firm inks, not only the ink color is uniform, but also sufficient printing pressure is required. This requires the printing device, including the inking system, to have high precision and performance.
3. Productivity: The productivity of a gravure printing machine is generally expressed by the printing speed. The expression method of printing speed is expressed in sheets/hour for a sheet-fed gravure printing machine; for a web gravure printing machine, it is expressed in m/min. The structural formation and characteristics of the gravure printing machine and the technical level of the automatic control system are the main factors that determine the level of productivity. For example, a flat-bed gravure printing machine uses an impression cylinder, which has a significantly higher printing speed than a flat-bed gravure printing machine. However, the reciprocating movement of the plate table limits the further increase in productivity. Therefore, it is gradually being pressed by the circle. Instead of a round intaglio printing machine. At present, gravure printing machines are developing in the direction of large-scale, high-speed, and linkage to maximize productivity.