Roll paper on-line humidifying device

Abstract

The invention discloses a roll paper on-line humidifying device which is provided with a humidifying roll arranged on a stand, a plurality of axially distributed suction passages are arranged below the roll surface of the humidifying roll, the suction passages are communicated with the outside through suction holes distributed on the roll surface of the humidifying roll; a roll paper winding section of the humidifying roll is internally provided with a water fog hood communicated with a water fog generator, an end face suction hood communicated with a vacuum pump is arranged at at least one end of the humidifying roll, and the part in which a suction mask of the end face suction hood is positioned just faces outside the suction passages below the roll surface of the humidifying roll. Compared with the prior art, the invention continuously humidifies single-layer or multi-layer paper when roll paper is unwound, and has the advantages of high humidifying efficiency and good humidifying quality.

Description

technical field [0001] The invention relates to the technical field of printing machinery, in particular to a device for humidifying unrolled roll paper before printing. Background technique [0002] In the printing process, it is often necessary to print two or more layers of multi-layer paper as a substrate. This kind of multi-layer paper, especially the multi-layer printing paper rolled into a roll, often delaminates during the printing process. Printed products are scrapped due to layer-staggered phenomena. In order to overcome delamination and layer-staggered phenomena, it is generally necessary to add a pressurizing mechanism to the printing machine. The purpose is to compress the multi-layer paper. Too low often affects the pressurization effect. Most of the raw materials of printing paper are webs rolled into rolls. At present, there is no machine for humidifying such paper materials. The web naturally absorbs water molecules in the air for humidification purposes....

AI Technical Summary

Problems solved by technology

This humidification process has many disadvantages. First, the water content is not easy to control; second, it takes a long time and occupies a large area; third, the humidification is uneven, and the water content of the central part of the paper is inconsistent with that of the edge, which may even cause excessive moisture at the edge to form curls. Ruffles cause the entire roll of paper to be scrapped

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