SU787183A1 - Device for longitudinal folding of web - Google Patents

Description

(54) DEVICE FOR PROLONGED FOLDING OF STRIP The invention relates to a wide industry. And specifically to devices for bending breaker in the manufacture of tires of radial design. A device for the longitudinal folding of a strip material is known. The bend is molded in it on a device in the form of an isosceles triangle, the base of which is a swivel roller and the sides are strips with an airfoil to create an air gap under the material. The strip of material, moving from top to bottom, is bent twice at the top of the triangle and is passed between two idle horizontal rollers, and then rolled up by a group of rollers driven by drive 1 The disadvantage of this device is the lack of centering of the strip, without which it can deviate from At the same position, and thus it is not possible to obtain a satisfactory bending accuracy. In addition, the inclusion of the device in the techno. Stream is difficult. MATERIAL It is also known a device for longitudinal folding of a strip material containing a freely rotating feed roller, a mechanism for forming an inflection line made in the form of a guide located on both sides of the latter and set at an angle to the duplicate rollers forming the bend side rods and needle chain, and duplicating rollers 2. The disadvantage of this device is that the guide, made in the form of a fixed beam with a slot in which the needles move, is not applicable for bend breaker strip. The belt is a high-elastic material with complex properties, a high coefficient of friction and adhesion. When dragging it along the guide, a high resistance is created and, as a result, undesirable material deformation. An additional resistance to the movement of the material is also exerted by a pair of side rods. The purpose of the invention is to eliminate the deformation of the strip material during its folding.

This goal is achieved by the fact that in a device for longitudinal folding of a strip material containing a freely rotating feed roller, duplicating rollers and a mechanism for forming an inflection line made in the form of a guide located on both sides of the latter and set at an angle to the duplicating rollers of the bend side rods and needle chain; the guide is made in the form of the role of Ganga.

The angle formed by the side rods is set in the range of 15-60 °.

The angle formed by one of the side bars and the plane perpendicular

duplicating roller washers, half the angle formed by the side rods.

FIG. 1 shows the device, a general view; FIG. 2 - the same plan view; Fig, 3 is a schematic representation of the process of bending the material.

The folding device comprises a freely rotating feed roller 1, mounted on frame 2, a centering unit in the form of tray 3 and cheeks 4, the surface of which is covered with fluoroplastic to reduce the amount of breaker strip against the tray. The mechanism for forming the inflection line consists of a guide in the form of a roller table 5, the rollers of which are covered with an elastic material, located on both sides of the roller table 5 side rods b and 7 and a needle chain 8. The latter is mounted on sprockets 9 mounted on the frame 10, which by means of The stars 11 are hingedly connected to the brace 12. At the end of the roller table 5, a roller 13j is installed located in front of the duplicating rollers 14, which are podruhineni with each other. The free end of the frame 10 from lateral displacement is fixed by the tooth 15. The side rods 6 and 7 are made of fluoroplastic, and together with the rollers and 13 form an isosceles triangle, with which the material is bent. The side rods 6 and 7 are mounted on the base 16 and set at an angle to the rollers 14. The belt strip is fed to the centering in the form of a free-hanging loop 17. After the bend, the belt breaker is rolled into a roll 18 with a gasket 19 using drive drums 20. The angle formed by lateral rods 6 and 7, set 11 within 15-60 °.

The device works as follows.

The joined breaker strip from the freely hanging loop 17 enters the centering unit, then onto roller 1, where it is picked up by needles of value 8 and in this position, fixed from lateral displacement, moves along roller 5, roller 13 until the gap between the rollers 14. At the same time, the edge of the belt The envelope bars, rods 6 and 7, acquire a vertical position and, gradually increasing along the width, form an inflection line on the roller 13 at the top of the angle formed by the rods 6 and 7. In the gap between the pair of duplicate rollers 14, the breaker bar folds a half. After the breaker strip has been rolled between the backup rollers 14, the folded strip is rotated 90 ° in a helical manner, acquiring a horizontal position, is rolled into a roll 18 with a gasket 19 coming in from a row of reels located. Rolling and pulling the breaker strip is carried out using two drive drums 20.

Claims (3)

1. A device for the longitudinal folding of a strip material containing a free, rotating feed roller, duplicating rollers and a mechanism for forming an inflection line, completed in the form of a guide, arranged on both sides of the latter and set at an angle to the duplicate roller forming inflection of side rods and the needle chain, characterized in that, in order to eliminate the deformation of the strip material when it is folded, the guide is designed as a roller table. 2. The device in accordance with claim 1, 1, 1 and 2 with the fact that the angle formed by the lateral sterols is set in the range of 15-60 °. 3. The device according to claim 1, wherein the angle formed by one of the lateral rods and the plane perpendicular to the axis of the backup rollers i is half the angle formed by the lateral rods. Sources of information taken into account in the examination 1. US patent number 3442504, cl. 270-86, 1969. 2. US Patent No. 2885205, cl. 270-86, 1959 (prototype).