Calender roll unit of a super calender

Abstract

The invention relates to a calender roll unit of a super calender, and belongs to the technical field of papermaking equipment. The calender roll unit of the super calender is characterized in that a calender roll (10) and a paper guide roll (8) are included, the calender roll (10) is vertically and slidably installed on a super calender rack (1) through a guiding device, the paper guide roll (8) is fixedly connected with the guiding device directly or indirectly, and the paper guide roll (8) and the calender roll (10) synchronously rise and fall. According to the calender roll unit of the super calender, the calender roll is installed on the guiding device, synchronous moving of the calender roll and the paper guide roll is achieved, and the situation that the paper calendering effect is affected due to the fact that the relative position of the calender roll and the paper guide roll changes in the use process is avoided; the guiding device enables the calender roll and the paper guide roll to do rectilinear motion, and compared with swing-arm type motion, change of the moving space of the calender roll is small, the problems in the processing and operating process are few, and it can be guaranteed that the centers of all the calender rolls are located in a same vertical plane.

Description

technical field [0001] A calender roll unit of a super calender belongs to the technical field of papermaking equipment. Background technique [0002] In paper production, the calender is the key equipment that ultimately determines the quality of the paper. For a long time, high-grade cultural papers such as coated paper, super matt paper and special industrial technical paper have been finished on existing super calenders. In the existing super calender, multiple calender rollers are arranged vertically. Due to the influence of the calender roller’s own weight, the line pressure of each nip gradually increases from top to bottom, resulting in a large difference in the quality index of the two sides of the paper after calendering, which hinders the Improve the grade of paper, affect the printing speed and printing effect. Some existing super calender top rolls and bottom rolls are fixed middle and high rolls. When the pressure of the working line changes, the change of th...

AI Technical Summary

Problems solved by technology

In the existing super calender, multiple calender rollers are arranged vertically. Due to the influence of the calender roller’s own weight, the line pressure of each nip gradually increases from top to bottom, resulting in a large difference in the quality index of the two sides of the paper after calendering, which hinders the Improve the grade of paper, affect the printing speed and printing effect

Some existing super calender top rolls and bottom rolls are fixed middle and high rolls. When the pressure of the working line changes, the change of the bending degree of the roll body under pressure will cause a large difference in the quality index of the paper after calendering and finishing.

[0003] In addition, the calender rolls of existing super calenders are all controlled by oil cylinders through swing arms to balance the gravity of the calender rolls. However, this structure makes the calender rolls do swinging motion in the vertical direction. During the process, the centers of the calender rolls are not in the same vertical plane, resulting in large changes in the spatial position of the calender rolls, and many problems in the processing and operation process

Moreover, the diameter of the calender roller will change due to wear and tear during use, which will cause the relative position of the calender roller and the paper guide roller to change, which will affect the effect of calendering and paper guide.

[0004] Chinese utility model patent ZL201320297415.0 discloses a multi-roll calender. The balance oil cylinder balances the gravity of the calender rolls through the swing arm hinged on the frame row. The arc movement of the point seat, the movement space of the calender roll unit changes greatly, and the calender rolls are prone to collide with each other in the process of fast roll separation and fast roll closing, which will damage the calender roll, and the calender roll The relative position of the guide roll will change with the wear of the calender roll, which will affect the calendering of the paper web

This method of gravity balance using the swing arm type is a technical misunderstanding in the structural design of the super calender, and in the improvement of the super calender, it has not been able to solve the large movement space of the calender roller and the calender roller and guide paper. Technical solution to the problem that the relative position of the rollers will change

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