Novel printing roller engraving process

Abstract

The invention relates to the technical field of printing roller production, in particular to a novel printing roller engraving process which comprises the following steps: obtaining a to-be-engraved printing roller main body; engraving negative lattice points on the outer wall of the plate roller main body in a laser engraving manner according to a preset lattice point splicing pattern; an engraving oblique line angle, a pulse length and FOC vector control parameters are preset, and a forward engraving part of a negative lattice point is engraved on the outer wall of the plate roller main body; setting an LAC parameter and a DC parameter, and carving a negative carving part of the negative lattice point; the smooth degree of the bottom of the negative lattice point is adjusted by adjusting the laser emitting angle of the engraving machine; carrying out polishing treatment on the plate surface of the engraved plate roller main body by using a diamond polishing belt; and the polished plate roller body is cleaned up through a cleaning machine. And the lattice points are uniformly distributed and have good smoothness, so that the plate roller is not easy to block, the ink loading quantity is stable, the engraving speed is high, the engraving range is wide, and the ink loading quantity adjusting range is wide.

Description

technical field [0001] The invention relates to the technical field of plate roll production, in particular to a novel plate roll engraving process. Background technique [0002] In the field of printing, the existing plate roller negative dots are mainly engraved in editing mode, the main processing range is 100LPI--300LPI, LPI is the resolution, how many screen lines are arranged at equal distances per inch, in the traditional commercial printing plate making During the plate making process, it is necessary to add a screen in front of the original image. This screen is composed of grid-like transparent and opaque mesh lines. These mesh lines are also called gratings. Due to the physical characteristics of diffraction, after the light passes through the network lines, it forms points of different sizes that reflect the changes in the original image. These points are halftone points. A halftone point will not exceed the area of ​​a grid at most. The more layers in an image,...

AI Technical Summary

Problems solved by technology

However, when the mesh number is low, the dots cannot be formed due to the high energy required. When the mesh number is high, the mesh wall will be thick, and the high proportion will cause the dots to be easily blocked and the leveling effect will be poor.

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