SU1678737A1 - Device for feeding long-size material - Google Patents

Abstract

The invention relates to equipment for handling flexible materials and is intended for lateral displacement of a web of material. The invention is simple in construction, compact and allows preserving the integrity of the transported thin film materials. The device includes feed and discharge rollers 4 and 5 and two rotary drums 8 and 9. The drums 8 and 9 are made in the form of truncated cones and are installed so that the tops of the cones are directed in opposite directions. When the tape bends around 10 tapered drums, it is displaced and, coming off the diverting roller 5, is located in the same plane with a given displacement. 2 Il.

Description

FIG.

The invention relates to the handling of long flexible materials, for example film, paper or textile web, and can be used in particular in film processing machines for blending its reverse (idle) branch.

The purpose of the invention is to simplify the design and reduce the size of the device.

Fig. 1 shows the position of a strip of material when the direction of movement of the displaced material branch is changed; Figure 2 is the same, while maintaining the direction of movement.

The device comprises walls of housing 1 and 2, between which axis 3 is fixed. On the latter, feed and discharge rollers 4 and 5 are mounted with independent rotation. In addition, axes 6 and 7 are located between walls 1 and 2 parallel to axis 3 on which pivoting deflecting drums 8 and 9 are installed. The latter are made in the form of truncated cones and mounted so that the tops of the cones are directed in opposite directions.

The device works as follows.

The lengthy material B in the form of a belt 10 enters the roller 4 in the direction of arrow A, bends around it and hits the tapered drum 9, perpendicular to its axis. Due to the fact that the forming conical drum is not parallel to the axis of this roller, the penta is rotated (twisted at half the angle at the apex of the cone) and, turning the surface of the roller, is displaced along a helical line towards the larger base of the conical drum. In this case, the pitch of the helix increases toward the larger base of the drum. Next, the tape comes off the drum 9 and enters the drum 8 already at an acute angle to the axis of the roller. Moreover, this angle is located on the side of the larger base of the drum. The tape is twisted in the opposite direction and, skirting the surface of the drum, is displaced along a helical line to a larger base, and the tape rotates when the tape becomes perpendicular to the axis of the drum, it is torn off from its surface and enters the cylindrical roller 5, it goes around it and moves in the opposite direction relative to vetei A along arrow B, parallel to the branch of Ive in the same plane with it ..

If it is necessary to maintain the direction of movement of the material, the tape after the drum 8 is guided under the roller 5 and bends around it from below.

The belt offset depends on the dimensions of the conical drums, the angle of the cone at the apex, and the distance between the axes of the conical drums. It can be determined by the formula

d0 d + d% + dz,

where 1, 5, fa are the corresponding displacements on the first cone, between the cones and on the second cone.

In this case, the displacements on the cones are

A1I 5Z 1TP-SG (

one

cos (y sin a)

-one),

where r is the smallest radius of the cone at the entry point of the tape to the cone (tape perpendicular to the p-generatrix of the cone on its sweep); a-angle at the vertex of the cone; y is the projection of the angle of the tape girth of a cone onto a plane perpendicular to the axis of the cone. Offset between cones

62 LtgDi,

where L is the center-to-center distance between the cones;

 - the angle between the generatrix of the cone and the tape at the point of separation of the tape from the cone, and

2Di 1,571 since.

The effectiveness of the device is. that when used as part of a mechanism for charging a polymer film into the technological path of equipment

there is no need to provide for a line of idle branches, located above or below the working branch. This makes it possible to reduce the overall dimensions of the equipment and to reduce its material consumption.

It is possible to use the device for multi-layer irrigation with intermediate drying between irrigations. In this case, the drying is carried out in one device during the oncoming movement of the webs, which also reduces the overall dimensions and reduces the material consumption of the equipment.

The size reduction is ensured by the fact that the axes of the rotary conical drums are parallel to the axes of the feed and

Claims (1)

the take-off roller, and the feed and take-off rollers themselves are mounted on a common axis. In addition, there are no other bulky details. This simplifies the design, reduces the metal consumption and the cost of the device, improves the reliability of its operation, the invention The device for feeding a long material containing feed and discharge rollers and a deflecting drum, which, in order to simplify the design and reduce the size devices, it additionally has a deflecting drum, and the feed and discharge rollers are placed between the drums on a common axis, while the deflecting drums are made in the form of truncated cones, the axes of which are parallel to the axis of the feed and discharge rollers, and their tops are directed in opposite directions . Yu