SU1444439A1 - Calender - Google Patents

Abstract

The invention relates to devices for improving web materials and can be used in the paper industry. The purpose of the invention is to increase productivity by reducing shaft wear and improving the quality of calendering. The calender contains a bed 1, a central drive drum 2 with bearings 3, a chain of 4 driven shafts 5 with bearings 6, tensioning devices 7, power elements 8 and a mechanism 9 for lifting the upper chain links 4. Bed 1 has extreme 10 and middle 1I racks with directions 12. Racks of the bed can be filled with vibration-absorbing material. The design provides reduced shaft wear and bed vibration and increased productivity while improving the quality of the coiled material processing. 2 hp f-ly, I ill. W (L

Description

“) T

four

00 CD

one

The invention relates to devices designed to improve the quality of web materials and can be used in paper industry.

The purpose of the invention is to increase productivity by reducing shaft wear and improving the quality of paper calendering.

The drawing shows a calender diagram

The calender contains a bed 1, a central drive drum 2 with bearings 3, a chain of 4 driven shafts 5 with bearings 6, tensioning devices

7, the power elements 8 for lifting the bearings with a drum, the mechanisms 9 for lifting the upper chain links of the driven shafts.

The bed 1 has extreme poles 10 and middle racks 11 with guides 2, between which bearings 3 are mounted with the possibility of vertical movement together with the drum 2 under the influence of power-elements.

8, mounted in racks П, The calender uses a chain of 4 driven shafts 5 with bearings 6, a clamping drum 2 coupled with tensioning devices 7 and a bearing of its shafts 5 located in a horizontal plane passing through the axis of the drum 2. , are mounted on the extreme stands 10 with the possibility of changing the gap between the drum 2 and the shafts 5.

At the ends of the guides 12, the middle pillars 11 are rigidly fixed mechanism 9, hingedly connected to the links

chains 4 for lifting the shafts 5 of these zves.

All racks of the bed are hollow and partially filled with vibration absorbing material.

Calender works as follows.

Before starting the calender in order to fill the web to be processed into the calender, the gap between the drum 2 and the shafts 5 is increased. The tension devices 7 increase the gap between the shafts 5, the axes of which are connected by these devices, the mechanisms 9 raise the upper chain links 4 of the shafts 5, after which the power elements raise the drum 2, through which the known means (for example, using filling ropes)

0

j

0

five

0

dits canvas. The drum 2 is rotated and, with it, the end of the web is pulled around the drum 2 and retracted over the lower of the shafts for further winding into a roll.

For calendering the filled web, the drum 2 with the bearings 3 is lowered by the force elements 8 onto the lower shafts 5 and the web is pressed against them. Then, the mechanisms 9 lower the upper links of the chain 4 with the shaft 5 and with the tensioning devices 7 the chain 4 is pulled, while the shafts 5 are pressed against the drum 2. The rotation of the latter gradually increases to the optimum speed. At the same time, tensioning devices 7 set the required pressure of the shafts 5 on the canvas with the help of power elements 8, and the pressure of the power elements 8 on the bearings 3 can vary from 0 to maximum while simultaneously pressing the upper shaft and reducing the lower shafts 5 and vice versa.

Applying the invention can provide a reduction in shaft wear of at least 20% and increase productivity by 10% while improving the quality of paper calendering.

five

five

0

0

F o

rmula of invention

Claims (3)

1. A calender preferably for processing a paper web comprising a frame, a driving drum, means for transmitting pressure on the web and a tension device, characterized in that, in order to increase productivity by reducing shaft wear and improving the quality of calendering, the means for transmitting the pressure on the canvas is made in the form of a chain of driven shafts mounted in bearings, two of which are located in a horizontal plane passing through the axis of the driving drum, and in bearings mounted on a stan e, while the chain ends are connected tensioner and the chain and the drum shafts have corresponding sponding power mechanisms vary guides gap therebetween. 2 о Calender according to claims 1, 1, 1 and 2 with the fact that the bed has middle racks with guides, with the drum mounted in the guides, and the power mechanisms in the middle racks. 31444439 3. Calender on PP. I and 2, which are filled with hollow vibrating components to fill so that the stands are absorbing material.