Printing unit of a carton printing machine

Abstract

A printing unit (4) of a carton printing press; the printing unit (4) comprises two side racks (2a, 2b); a stamping roller (3a), a printing plate roller (3b) and an anilox roller (3c) are rotatably disposed between the two side racks (2a, 2b); the printing plate roller (3b) is located above the stamping roller (3a), and the anilox roller (3c) is located above the printing plate roller (3b); vacuum absorption boxes (5) essentially flush with each other are disposed beside the stamping roller (3a); each rack (2a, 2b) comprises an underframe and a sliding rack (21a, 21b) slidably arranged on the underframe; the stamping roller (3a) and the vacuum absorption boxes (5) are located on the underframe, and the printing plate roller (3b) and the anilox roller (3c) are positioned on the sliding rack (21a, 21b), thus greatly improving working efficiency and continuous working precision without adjusting the working heights of the stamping roller (3a) and the vacuum absorption boxes (5). The present invention having the above characteristics and advantages can be applied to a carton printing press or a paperboard printing press.

Description

technical field [0001] The invention relates to a carton printing machine, in particular to a printing unit for carton printing. Background technique [0002] Print text or patterns on paper, especially on thick cardboard, so that the appearance of the product packaging box has rich expressive content. The machine that realizes this process is generally called a cardboard printing machine or a carton printing machine. The printing method of repeatedly printing the same area and the same shape of text or graphics with different colors on a piece of cardboard is called multi-color overprinting. At present, in order to enrich the color of packaging appearance parts, overprinting is often used for color printing on packaging appearance parts, such as figure 1 As shown, it is a schematic front view of a cardboard 2 with a color pattern 21 produced by a multi-color overprinting method. When it is necessary to make a color pattern 21 on the cardboard 2, such as when a specific col...

AI Technical Summary

Problems solved by technology

[0005] In addition, since the feeding table 14 and the discharging table 15 are completely hidden in the frame 17, the feeding and discharging process, that is, the initially printed cardboard 2 is transported from the previous printing unit to the next printing unit. The stroke of the unit is very short, so the drying time between the two printing processes before and after is very short, which often causes the pattern of the cardboard 2 to enter the next printing unit before it is completely dried, which is very easy. Spread the undried pigment and affect the printing effect; in order to prevent this problem, it is often necessary to control the printing speed to ensure sufficient drying time

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