Combined printing device and printing method

Abstract

The invention discloses a combined printing device and a printing method. The printing method comprises the steps that a paper conveying mechanism conveys paper to a first offset printing mechanism; the first offset printing mechanism prints paper through an offset printing technology, and the paper is conveyed to a flexible printing mechanism; the flexible printing mechanism prints the paper through a flexible printing technology, and the paper is conveyed to second offset printing mechanisms; a drying mechanism dries flexible printing ink in the paper conveying process; a plurality of second offset printing mechanisms sequentially print the paper through the offset printing technology; a paper collection mechanism carries out collection and stacking on the printed paper. Flexography color groups are combined on an offset printing machine, on the premise of meeting rapid printing, lines, characters and lattice points on single paper are clear, patterns on a printing undertint on-site area on the single paper are uniform and thick, high-speed stable printing is achieved, operation is carried out only according to the working procedure of an offset printing device, and the operation requirement is low.

Description

technical field [0001] The invention relates to printing technology, in particular to a combined printing device and printing method. Background technique [0002] In printing technology, offset printing technology and flexographic printing technology are relatively commonly used technologies. Offset printing technology has the characteristics of fine dot printing, good printing effect of lines and characters. However, for large-area solid printing, especially light-color solid printing, due to the difficulty in controlling the balance of ink and water, the offset printing process will have problems such as uneven printing in the real area, dark front and light back, which will affect product quality. Flexographic printing technology has a stable printing effect on solid color blocks in large areas, but due to the use of resin plate printing, the screen printing deformation is large, the printing effect of fine screen dots is defective, and the printing effect of lines and ...

AI Technical Summary

Problems solved by technology

However, for large-area solid printing, especially light-color solid printing, due to the difficulty in controlling the balance of ink and water, the offset printing process will have problems such as uneven printing in the real area, dark at the front and light at the back, which will affect product quality.

Flexographic printing technology has a stable printing effect on solid color blocks in large areas, but due to the use of resin plate printing, the printing deformation of the dots is large, the printing effect of fine dots is defective, and the printing effect of lines and characters is also not good.

[0003] In the prior art, both the offset printing machine and the flexographic printing machine include a frame, a printing plate roller mounted on the frame, and an inking device matched with the printing plate roller, and each type of printing machine is suitable for certain printed matter. , poor compatibility

At present, the most prominent shortcoming is that the advantages of various printing processes are not organically and reasonably concentrated on one printing machine, which greatly wastes resources.

Moreover, the ink feeding, water feeding and printing devices in the offset printing machine have high processing precision, complicated installation and difficult adjustment, and cannot be effectively matched with the flexographic printing machine

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