Paper flattening device

Abstract

The invention relates to calendaring operation equipment in the papermaking process, in particular to a paper flattening device. The paper flattening device comprises a machine frame, a paper unwinding roller winding to-be-flattened paper, a lower pressing roller, an upper hot-pressing roller, a pressing lifting mechanism adjusting extruding force of the lower pressing roller and a paper winding roller; the upper hot-pressing roller comprises a roller, a supporting frame and a heating horizontal emitting lamp, the roller is divided into an arc side wall and a plate-shaped side plate, the sideplate is provided with an annular hole, and an annular supporting plate is rotationally connected in the annular hole, and is fixedly connected on the machine frame; the heating horizontal emitting lamp is fixed on the annular supporting plate, refraction liquid is arranged in the roller, the heating horizontal emitting lamp is located at the upper portion of the refraction liquid, light rays emitted by the heating horizontal emitting lamp are refracted through the refraction liquid to be radiated to the tangent portion between the lower pressing roller and the upper hot-pressing roller, and aliquid supplementing opening supplementing the refraction liquid and a gas outlet discharging gas are formed in the annular supporting plate. The paper flattening device can form the temperature gradient in the paper-sheet thickness direction and can also synchronously roll paper.

Description

technical field [0001] The invention relates to equipment for calendering operation in the papermaking process, in particular to a paper flattening device. Background technique [0002] In the process of paper sheet processing, in order to improve the surface properties of the paper sheet, such as smoothness and gloss, and to improve the transverse thickness fluctuation of the paper web, it is often necessary to perform calendering operations on the paper. The calendering operation of paper is to deform the paper in its thickness direction by applying a certain pressure to the paper. When the pressure is removed, part of the paper deformation is restored, and the other part remains permanently. [0003] Because paper is mainly composed of plant fibers, and plant fibers are mainly composed of three organic polymers: cellulose, hemicellulose, and lignin. These components all have a glass transition temperature at a certain humidity, that is, when the temperature is higher tha...

AI Technical Summary

Problems solved by technology

[0005] The problems in the above patents: the laser paper is heated before rolling. Although the laser can heat the paper well to form a good temperature gradient, there is a time difference between the timing of heating and the time of rolling, and the temperature of the paper has dropped during rolling. Therefore, the expected rolling effect cannot be achieved

In addition, although laser heating equipment has good heating performance, the cost of equipment is too high and it is difficult to apply it on a large scale.

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