A device for reversely erasing viscous fluid substances on the surface of a soft roller by using a hard roller

Abstract

The invention relates to a device for reversely erasing a viscous fluid substance on surface of a soft roller by a hard roller and belongs to the technical field of a printing machine. The device comprises a doctor blade which has an upward cutter point and comprises a protraction position and a retreating position; the cutter point of the doctor blade is contacted with a metal reversely erasing roller line when the doctor blade is at the protraction position; an ink receiving device is arranged below the doctor blade; the metal reversely erasing roller is tangent with a plate erasing roller and rotates reversely; firstly, the viscous fluid substances such as waste ink and the like are erased from the surface of the plate erasing roller through the metal reversely erasing roller in working, and the waste ink on the metal reversely erasing roller is transferred and removed by the doctor blade and gradually flows to the ink receiving device under the action of gravity, so that erasing effect of the ink can be ensured by reverse contact rotation of the metal reversely erasing roller and the plate erasing roller; the doctor blade is not directly contacted with the plate erasing roller, so that injury cannot be generated; and the waste ink is automatically gathered, so that severe contamination cannot be generated.

Description

technical field [0001] The invention relates to a device for wiping, collecting and conveying viscous fluid substances such as waste ink on printing machinery, especially a device for reversely erasing viscous fluid substances on the surface of soft rollers with hard rollers, belonging to printing machinery technology field. Background technique [0002] According to the applicant's understanding, there are usually three ways to deal with viscous substances such as waste ink from the printing plate by the wiping roller of the printing machine: [0003] 1) Dry wipe method - use cotton cloth or paper to wipe the waste ink on the surface of the wiping roller. The consumption of this method cotton cloth or paper is very big, and cost is high, and the pollution that environment is caused is serious. [0004] 2) Water washing method - take the waste ink away with the water flow through an appropriate cleaning solution and cleaning solution. This method not only pollutes the env...

AI Technical Summary

Problems solved by technology

In this way, since the sharp edge of the doctor blade directly contacts the rubber layer on the surface of the wiping roller, it is easy to cause serious damage to the rubber layer on the surface of the wiping roller.

In addition, due to the difficulty of installation and adjustment, the consistency of the edge of the doctor blade in contact with the wiping roller along the direction of the generatrix is ​​poor, and it is very difficult to adjust the contact pressure between the edge of the doctor blade and the wiping roller. The effect of surface waste ink is poor

Therefore, there are more serious problems in reliability and efficiency in the direct scraping method of doctor blade.

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