Automatic cleaning device for ink scraping blade of gravure printing machine and cleaning method thereof

Abstract

The invention discloses an automatic cleaning device for an ink scraping blade of a gravure printing machine and a cleaning method thereof. The cleaning device comprises an air cylinder body and an air cylinder sliding block, wherein the air cylinder sliding block is fixedly connected with a fixed strip; the left end of the air cylinder body is provided with an air cylinder rotating shaft, a shifting fork and a shaft end air cylinder; the shaft end air cylinder drives the air cylinder rotating shaft to rotate and drives the air cylinder body and the air cylinder sliding block to rotate by theshifting fork, so that a stripping end of the strip is close to or away from the blade of a scraper. The cleaning method of the cleaning device comprises the following steps of: (1) installing the cleaning device; (2) adjusting the driving stroke of a piston rod of the shaft end air cylinder; (3) moving the air cylinder sliding block and the strip to one end of the scraper; (4) counting the time interval for cleaning the blade of the scraper; recording the time as t1; and (5) setting the time interval of the joint working of the shaft end air cylinder and the air cylinder body as t2, wherein t2 is less than and equal to t1. The automatic cleaning device for the ink scraping blade of the gravure printing machine and the cleaning method thereof provided by the invention can clean the blade of the ink scraper, and the closing degree between the cleaning device and the edge can be adjusted, and the cleaning is complete, so the 'tailing' on a printing product is prevented.

Description

technical field [0001] The invention relates to a gravure printing machine, in particular to an automatic cleaning device and a cleaning method for a scraping edge of a gravure printing machine. Background technique [0002] Printed matter sometimes smears during the printing process, and the printed pictures or lines are blurred. The cause of the tailing phenomenon generally lies in the ink itself or the scraper. [0003] There is a scraper on one side of the printing roller of the gravure printing machine, which scrapes off the excess ink on the surface of the printing roller; when the gravure printing machine is printing, the printing roller rotates at a high speed, and the printing speed of the printed matter passing through the printing roller is as high as 160-200m / min, due to the high rotation speed of the printing roller, the surface of the roller falls off and a small part of ink remains on the upper side of the edge of the doctor blade. After accumulating for a p...

AI Technical Summary

Problems solved by technology

[0005] (1) The amount of cleaning labor is large. Taking the gravure printing machine with a printing speed as high as 160-200m / min as an example, it is cleaned every 40 minutes or so during the general working process, and the cleaning frequency is relatively high.

[0006] (2) Manual cleaning requires high force, if the force is uneven or small, if the cleaning is not clean or thorough, it is easy to cause tailing of printed matter, if the force is large, or the strip is stretched too long, it may be damaged. Stabs to the surface of the printing roller, which will affect the printing

[0007] (3) Manual cleaning still has a certain risk of damage. Due to the printing roller and the roller body on it, the two rollers clamp the printing port to rotate, and when the cleaning end of the strip is attached to the surface of the printing roller, it will be driven to move. If it is not retracted in time, it will be bitten between the two rollers, causing damage to the rollers and even the cleaners

[0008] At present, gravure printing machines produced and sold at home and abroad are not equipped with cleaning devices for scrapers.

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