SU885051A1 - Device for making tubes of web material - Google Patents

Description

I

The invention relates to the manufacture of pipes and is intended for the production of multilayer pipes of various materials by the method of winding tapes, such as paper and a thermoplastic film.

A device for the manufacture of tubes of tape material, comprising knots of winding layers of tapes into a tube, a shaft with cylindrical nozzles for accommodating the layers of a tube and mounted on a shaft and connected with nozzles for stepwise moving the tube, is connected. The pipe wall is made up of strips wound on the mandrel, which are detached from bobbins, and the pipe is wound by moving a special mandrel, which consists of fixing and. transporting sections, segmented. The sections perform matched reciprocating movements, and the segments expand on a forward motion and taper on

returnable. Movement of sections and seg. The copings are made from two drive shafts of the mandrel equipped with cams. The fastening of the layers of the pipe to each other is carried out with the radiation of the l3 lamps.

The feature of obtaining a pipe with protective layers of thermoplastic films is that in the heating device after welding films

10 in a monolithic layer, this layer retains some time in a fluid state and compliance; therefore, the use of a mandrel with radial expansion and narrowing of segments is not

Claims (3)

15 will ensure that the pipe is securely fastened to the sections interacting with the compliant layer. In addition, with the rapid return movement of the transporting sections, the tube, while continuing to rotate, stops moving along the mandrel, which inevitably leads to disruption of the normal operation of the device. An annular gap between the fixing and transport sections may pinch a pipe portion that is in flowing condition. The known device does not provide a strict relationship between the axial movement of the section and their rotation, which reduces the quality of the pipes. The purpose of the invention is to improve the quality of manufacturing multilayer pipes of tape materials with protective inner and outer layers of thermoplastics. The goal is achieved by the fact that a device for the manufacture of tubes of tape material, comprising wounding layers of tape layers in a tube, a shaft connected to a drive with cylindrical nozzles to accommodate the pipe layers and mounted on a shaft and connected to the nozzles for stepwise movement of the tube, each cam is made with profiled grooves for axial movement of the corresponding nozzle, while the nozzles are made with protrusions and depressions on the front sides for axial movement of one relative to the other. The device has additional winding assemblies of protective thermoplastic layers of tapes and means for bonding layers. The means of fastening the protective layer is made in the form of heating chambers covering the nozzles. FIG. 1 schematically shows a device, a general view, in FIG. 2 - shaft longitudinal section; in fig. 3 view A in FIG. 2; in fig. - node I in FIG. 2. The device comprises a hollow shaft 1 mounted in a rolling support 2, on which movable nozzles 3 with face protrusions and depressions are located (Figures 2-4). Inside the hollow shaft there is a shaft 5 with bearings fixed to it by cams 6 separated by distance sleeves 7 (Fig. 0. Cams 6. and nozzles 3 are connected to each other and hollow shaft 1 by fingers 8 with rollers 9 and 10. The cam shaft and the hollow shaft are connected to each other by gear wheels 11, the shaft of which is associated with an adjustable engine 12. Along the winding axis of the pipe 13 are installed with the possibility of adjusting the inclination of the reel with paper and plastic tapes, and so 4. cameras 15 and rollers 16 with thermoelements. The cooling unit 17 is mounted outside the winding zone. The device is equipped with a pipe cutting means 18. The device operates as follows: From the reels 14, paper and plastic tapes are wound on the moving nozzles 3, one layer of paper, a protective layer of several tapes of a thermoplastic film a layer of paper and film or a two-layer paper-plastic tape, an outer protective layer of thermoplastic film and an outer layer of a single paper tape. The heating chambers 15 and the thermal elements of the rollers 16 are turned on and brought to the operating temperature. Then the engine 12 is turned on, the rotation from which is transmitted through the gears 11 to the shaft 5 and the hollow shaft. Due to the relative rotation of the hollow shaft 1 around the cams 6, fingers 8 with rollers 9 and 10 move in the profile grooves of the cams by beating the longitudinal grooves of the hollow shaft 1, causing spiral movement of the nozzles 3, which in turn entrain the produced grooves 13 in motion. 6 provides an accelerated return nozzles 3 to its original position. The pipe 13 receives from the reels 14 paper and plastic tapes, which are welded in layers, pass through the cooling unit 17, and are cut into dimensional sections by means 18. The present invention allows for a high-performance process for the manufacture of multi-layer pipes in order to replace pure plastic pipes with them. Pipes manufactured from kraft paper (bag paper) and polyethylene film are three times stronger than pipes of the same size made of polyethylene when tested for breaking and hydraulic pressure. Claim 1. Device for manufacturing tubes of tape material, comprising winding assemblies of layers of tapes into a tube, a shaft connected to a drive with cylindrical nozzles for placement, pipe layers and mounted on a shaft and connected to nozzles for step pipe movement, characterized in that, in order to improve the quality of pipes, each cam is made with shaped grooves for axial movement of the corresponding nozzle, while the nozzles are made with protrusions and depressions on the front sides for axial movement of each one relative to another. 2. The device according to claim 1, characterized in that it has additional winding units thermoplastic tape layers and layer bonding means, 3. The device according to claim 2, wherein the means for fastening the protective layers is made in the form of heating chambers enclosing the nozzles. Sources of information taken into account in the examination 1. US patent number 3837970, class 15b 25, 197A.