Compact newspaper printing machine

Abstract

The invention discloses a compact newspaper printing machine. The compact newspaper printing machine comprises four color cell units mounted between an operation side wall board and an engine side wall board of a printing machine body from bottom to top, wherein each of the four color cell units comprises a set of a printing cylinder group, two ink supply systems and water supply systems; the printing cylinder group is located at the middle part; the ink supply systems are located on the left side and the right side of the printing cylinder group in a one-to-one correspondence manner; the water supply systems are located on the lower left side and the lower right side of the printing cylinder group in a one-to-one correspondence manner; and the arranging distance between every two adjacentcolor cell units is 0.5-0.7 m, so that the total height of the printing machine body is not greater than 2.8 m. According to the compact newspaper printing machine disclosed by the invention, the expanding numerical value of a paper belt is reduced by half, and meets the a national standard of 0.1mm, the printing quality is improved, and the waste newspaper capacity during printing can be obviously reduced.

Description

technical field [0001] The present invention relates to a compact newspaper printing machine. Background technique [0002] A traditional newspaper printing machine generally consists of four color unit units, and the paper tape passes through the four color unit units from bottom to top to complete the double-sided four-color printing of the paper tape. [0003] figure 1 It is the structure of a typical newspaper printing press. Each color group unit is composed of a printing cylinder 10 in the middle, an ink supply system 20 and a water supply system 30 on both sides. The distance between adjacent color group units is about 1 meter, and the total height H of the entire printing machine is 4.5 meters or so. [0004] When the existing printing machine is working, the paper tape will absorb the water on the printing plate after being printed by each color group unit. Due to the influence of water, the paper tape will have a "fan-shaped expansion" phenomenon in the width di...

AI Technical Summary

Problems solved by technology

This "fan-shaped expansion" has the most obvious impact on the overprint accuracy. When the expansion value is greater than the overprint accuracy specified by the national standard by 0.1mm, the overprint will be inaccurate when the paper tape enters the next color group unit for printing.

If certain elimination measures are not taken, the printing quality of color newspapers will be greatly affected

In order to solve this problem, anti-expansion devices are usually used to solve this problem, that is, on the path of the paper tape entering the second color group unit, on the path of the paper tape entering the third color group unit, and on the path of the paper tape entering the fourth color group unit. One such anti-expansion device 40 is respectively installed on the path of the color group unit, thus making the structure of the printing press complex and highly difficult to compress

In addition, the use of this anti-expansion device requires manual adjustment, which is not only slow, but also unstable

If it is not adjusted properly at the beginning of printing, a large amount of printed sheets will be wasted, which is extremely unsuitable for the current production needs of small batches and multiple varieties

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