Anti-smearing paper flattening device applicable to quality detection system of dry offset press

Abstract

The invention discloses an anti-smearing paper flattening device applicable to a quality detection system of a dry offset press. The anti-smearing paper flattening device comprises a hollow spoke type roller of the dry offset press and a plurality of strip-shaped paper flattening sheets, wherein the hollow spoke type roller comprises a plurality of circular spoke sheets which are coaxially and fixedly connected with a central shaft of a paper outlet chain wheel and are distributed along the central shaft at equal intervals; each spoke sheet corresponds to one flattening sheet; each flattening sheet and the corresponding spoke sheet are located on a same plane; each flattening sheet is divided into an upper section, a middle section and a lower section; the arc-shaped sides, matched with the outer edges of the spoke sheets, of the upper sections and the middle sections of the flattening sheets lean against print products on the outer edges of the spoke sheets, and a shooting gap is formed between the arc-shaped sides and the print products; the lower sections of the flattening sheets are used for guiding the print products out to a paper chain channel. According to the anti-smearing paper flattening device applicable to the quality detection system of the dry offset press, moving tracks of paper on the dry offset press are limited by the flattening sheets, so that irregular bend, deformation, floatation and the like of the print products in a detection position are avoided, and the detection accuracy of the print products is further improved.

Description

technical field [0001] The invention relates to an anti-smearing paper flattening device used in conjunction with a dry offset printing machine quality inspection system, belonging to the technical field of printing. Background technique [0002] In the printing industry, the traditional method of product quality inspection is to use manual visual inspection to inspect products, which is not only labor-intensive, but also easily causes defects to be missed. With the development of machine vision technology, the online quality inspection system that can monitor the printing quality of products in real time has been widely used in the printing industry and has promoted the improvement of printing quality. [0003] The online inspection system uses a camera to take images of printed products and uses pattern recognition technology to analyze them. Its processing object is non-rigid paper. During the operation of the printing press, the paper is pulled by the jaws and moves at ...

AI Technical Summary

Problems solved by technology

Although the above two methods can obtain a good paper flattening effect, they also have certain limitations: first, both methods are only applicable to the case where there is a carrier under the paper, and the paper must be attached to the carrier. If the carrier The effective bearing area is much smaller than the area of ​​the paper to be flattened, and it will not be used; secondly, in the existing contact flattening method, the flattening part contacts the printing surface of the paper with a certain pressure. If it is used for quality control in the printing process, due to The ink is not yet dry, which will cause the printed graphics to be smudged

Limited by the mechanical structure of the printing machine, the rear quality inspection device can only be installed on one side of the hollow spoke cylinder. Due to the hollow structure of the hollow spoke cylinder, the conventional paper flattening method cannot be used

[0006] Restricted by the above factors, although people have tried various paper flattening methods, they have not been able to solve the problem of effectively flattening the paper without causing printing ink to smear

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