SU1431990A1 - Arrangement for controlling transverse position of moving web - Google Patents

Abstract

The invention relates to devices for winding thin film materials during their manufacture, in particular to devices for preventing folds and wrinkles on the winding materials and for simultaneously controlling the transverse position of the film. The purpose of the invention is to increase the reliability of the device. The device includes two pairs of spherical rollers 1 mounted on axes x 2, the supports of which 5 and A are articulated. The rollers are rotatably mounted around a fixed vertical axis 13, for which the body 4 of each lower roller is rigidly connected with the bracket 11 to the sleeve 12 pivoting on the axis 13. The bodies 4 are connected by means of levers and hinges with actuator rod. 4 il. (L

Description

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The invention relates to devices for winding thin film materials during their manufacture, in particular, to devices for preventing wrinkles and wrinkles on the winding materials and for simultaneous control of the transverse position of the film, and can be used in chemical, textile and paper and paper industries.

The purpose of the invention is to improve the quality of the web and the reliability of the device.

FIG. 1 shows the device, top view; in fig. 2 - section А-А on ig. 1 (device variant without a driver); in fig. 3 - the same (version of the device with a drive); in fig. 4 is a view B in FIG. 1 (rotated by 90).

The device includes two pairs of centrifugal rollers 1, the working surfaces of which are spherical, Rollers 1 are fixedly mounted on axes x 2, which are placed with the possibility of rotation in housings 3.4. When this rollers are located above and below the blade 5, and it is sandwiched between them. Pairs of such rollers are located along both edges of the web, so that the axes of rotation of the rollers are set at an angle to the direction of web motion. The housings 4, located under the film at different edges of the canvas, have rigidly fixed levers 6, which are connected pivotally to the thrust 7, connected with the slider 8 of the operating mechanism 9. An edge position sensor 10 is installed at the edge of the canvas 5.

The support bodies of the 4-nylon rollers are fixed by means of the brackets 11 with the sleeves 12, which are installed to rotate on the axles 13. The latter are fixedly attached to the frame, and their position is chosen so that their imaginary extension lies on the web clamping points. 5 rollers 1. Thus, each pair of rollers turns out to be mounted rotatably about an axis 13, perpendicular to the web 5 and the rollers passing through the clip clamping points of the web. The housings 3 and 4 are interconnected by means of hinges 14. On the opposite side of the housings relative to the rollers, there are slides with forks 15 in which rotatably

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axles 16 are inserted with eccentrics 17 fixed in them, which come into contact with guides 18 rigidly connected to housings 4.

On axis 16, handles 19 are fixed. The sliders of forks 15 are movably inserted into cylindrical supports 20 located on bodies 3 that can be rotated relative to axes perpendicular to the axis of rotation of the rollers, and carry adjustment nuts 21 at their ends. There are 22 bodies between them. springs 23 are inserted. A device with a drive in addition to the previous one has gear 26 fixedly mounted on axles x 24 and 25 and meshed with each other in pairs. The axles 25 are interconnected, with the shaft 27 with two hinged couplings 28, and the shaft can move in the axial direction. On one of the axes 25, an asterisk 29 is fixedly fixed, connected by a chain 30 with a drive 31, which are located on the bracket 32.

The device works as follows.

Before refilling the film, rotate the handle 19 upwards. At the same time, the centrifugal 17 rests in the direction of the 18, and the plug 15 moves downward and, pressing the nut 21 into the support 20, rotates the housing 3 relative to the axis 14, while compressing the spring 23 and retracting the rollers 1 from each other. The web (film) 5 is filled into the gap between the rollers 1 and the handle 19 is turned upwards.

The housings 3 turn around the axles 14 in the opposite direction, and the rollers 1 clamp the film. In this case, the clamping force can be adjusted by a nut 21. When the film is moved in the direction indicated by the arrow, the rollers, being in contact with it, receive rotation. Due to the fact that the rollers are set at an angle to the direction of movement of the film and the corners have different signs, the film is stretched by the rollers in opposite directions, towards the edges, thereby smoothing and eliminating wrinkles. With an arbitrary displacement of the film towards one of the edges, the sensor 10 of the position of the edge of the web gives a corresponding signal to the actuator 9.

Slider 8, acting on th 7, turns bodies 3 and 4 relative to axes 11 in the direction opposite to the displacement of the web, restoring a predetermined trajectory of its movement.

In the drive unit, the rollers 1 receive rotation from the drive 31 by means of a chain 30 and sprockets 29 through shafts 25 and 27, clutches 28 and gears 26, smoothing the web and controlling its path of motion in the same way as with non-driving rollers.

The application of the proposed device allows simultaneous smoothing of the web and its lateral displacement. Replacing the linear contact between the rollers and the film with a point contact (due to the working surface of the spherical rollers) prevents stretching or damage of the film, wrinkles on the film, i.e. contributes to the quality of the final product, a significant reduction in the marriage.

The ability to rotate the spherical rollers around the axis passing through the clamping point of the film, caused by their location and the presence of a mechanism for their synchronous rotation, allows centering or transverse movement of the film to be performed smoothly, without jerking, which also contributes to reducing the number of scrap and improving the quality of films. especially in the production of certain types of coated films. Preserving the integrity of such a coating, having the form of a liquid suspension, on a non-heat-treated film, using known devices, was difficult and required trimming the edges of the film with a large width due to damage to the coating by rolling the rollers on it, with a film of considerable width across the contact area.

The proposed device will reduce the metal content and weight due to a decrease in the length of the rollers. The execution of the drive device will allow

divide zones with different tension forces on the canvas, which is necessary, for example, when thermally relaxing film. In this case, the drive can act as either a drive or a brake.

g These reasons allow us to intensify some technological processes in the production of films, reducing the waste of the film into waste due to the improvement of its quality.

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Claims (2)

Invention Formula A device for controlling the lateral position of the moving web, 25 comprising a web edge position sensor, an actuating mechanism and centering rollers with spherical working surfaces for clamping the web edges, mounted under angle 30 35 40 the scrap to the direction of movement of the blade can be rotated around an axis, perpendicular to the plane of the blade and connected with the housings of the centering rollers connected in pairs by means of hinges and equipped with means for adjusting the pressing force of the centering rollers, so as to increase the quality of the blade and reliability of work, in each case one centering roller is installed in such a way that the axis of rotation of each pair of rollers passes through the clamping point of the web. ten 2. / l f /five 7- -tr ui.1 View b Figm