Trimming device for gravure printing machine

Abstract

The invention discloses a trimming device for a gravure printing machine. The trimming device comprises a machine body, a centering mechanism used for putting a printing product straight, a cutting mechanism used for cutting the edge part of the printing product along a scanning line, a negative pressure scrap suction mechanism used for removing wool fibers produced after trimming by suction and a conveying mechanism used for driving the printing product to move, wherein in the conveying direction of the printing product, the cutting mechanism is positioned in front of the centering mechanism; the cutting mechanism comprises a knife holder, a slitting knife used for slitting the edge part of the printing product and a base used for being propped against the printing product to be convenient for the slitting knife to perform force application; the slitting knife is connected with the knife holder; and the base is positioned below the slitting knife. The trimming device for the gravure printing machine has the advantage that the rejection rate is reduced by trimming wool fibers on the edge part of the printing product.

Description

technical field [0001] The invention relates to a tool for trimming printed products, in particular to a cutting and trimming device for a gravure printing machine. Background technique [0002] In the prior art, the on-line cutting of the gravure printing machine is mainly to transfer the image and text through the printing unit reel, and then through the in-line cutting machine to cut according to the required size. Slitting is as long as one of the printing units of the printing unit makes a graphic mark of the size required for the product on the gravure, but when the graphic mark enters the in-line cutting unit, the scanning head of the cutting unit will The text is scanned and analyzed by the amplification circuit of this unit, and then a numerical control value is output to the main motor control system. Make the traction motor speed to change the paper cut size. However, the printing at both ends of the cut product is caused by drying and other factors, and finally...

AI Technical Summary

Problems solved by technology

However, the printing at both ends of the cut product is caused by drying and other factors, and finally the cut product runs left and right (drawing gauge) greatly, which leads to the production of the post-process due to the left and right movement of the printed image and text. The reason is that a large amount of waste products are generated after passing through the subsequent process

This phenomenon will also occur when both sides of the paper are damp, because it often leads to a decrease in the yield, which in turn requires a large number of workers to screen waste products in the later stage

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