High-speed double-faced hard-pressing-soft offset printing press

Abstract

The invention discloses a high-speed double-faced hard-pressing-soft offset printing press which comprises a paper conveying unit, a front transfer unit, a frame, a front-face printing unit, a back-face printing unit and a paper collecting unit. The paper conveying unit is provided with four paper inlet suction nozzles used for sucking paper. The front-face printing unit comprises a first ink system, a first plate cylinder, a first blanket cylinder and a first impression cylinder, wherein the diameter of the first impression cylinder is two times that of the first plate cylinder and that of the first blanket cylinder. The back-face printing unit comprises a second ink system, a second plate cylinder, a second blanket cylinder and a second impression cylinder, wherein the diameter of the second impression cylinder is two times that of the second plate cylinder and that of the second blanket cylinder. The paper collecting unit is provided with a movable paper support and an air chamber compressed air mechanism. According to the high-speed double-faced hard-pressing-soft offset printing press, the diameter-doubled impression cylinders are adopted, so that registration of a double-faced machine is improved; and moreover, the structure is compact, efficiency is high, energy consumption is low, and the high-speed double-faced hard-pressing-soft offset printing press is a top-grade practical printing press which is wide in application range and convenient to operate.

Description

technical field [0001] The invention relates to an offset printing machine in the printing industry, in particular to a high-speed double-sided hard press soft offset printing machine. Background technique [0002] With the development of the printing industry, the quality requirements of book printing are also greatly improved. At present, most of the double-sided hard press soft offset presses on the market use equal-diameter impression cylinders for printing. It is difficult to guarantee, and the speed of book and periodical printing machines in the domestic market is between 10,000 and 11,000. Patent No. CN201320875682.1 discloses a double-sided single-color hard press soft offset printing machine with an upper and lower staggered structure. The number of paper transfers is reduced, the transfer accuracy is improved, and the probability of ghosting is reduced. The disadvantage is that the impression cylinder adopts a cylinder with the same diameter as other cylinders, an...

AI Technical Summary

Problems solved by technology

[0002] With the development of the printing industry, the quality requirements of book printing are also greatly improved. At present, most of the double-sided hard press soft offset presses on the market use equal-diameter impression cylinders for printing. It is difficult to guarantee, and the speed of book and periodical printing machines in the domestic market is 10,000-11,000. Patent No. CN201320875682.1 discloses a double-sided single-color hard press soft offset printing machine with an upper and lower staggered structure. The number of paper transfers is reduced, the transfer accuracy is improved, and the probability of ghosting is reduced. The disadvantage is that the impression cylinder adopts a cylinder with the same diameter as other cylinders, and the large deformation of the paper will easily affect the registration accuracy. The high-speed double-sided The hard press soft offset printing machine adopts double-diameter impression cylinders, and the speed of the whole machine reaches 15,000. It is suitable for paper with a thickness of 28g to 128g, and it can also print books on coated paper. It is a high-end and advanced double-sided hard press soft offset printing machine.

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