MXPA99003033A - Textile band, procedure for the manufacture of the same and device for making such procedimie - Google Patents

Abstract

The invention relates to a textile web, especially as a basis for paper machine transports, where the textile web presents structure threads, 18, 9, 10, 11 and looking in the direction of the width is composed of at least several partial webs ( 6, 7) placed next to one another, which at their band edges (12, 13) are welded together. The invention is characterized in that the partial strips (6, 7) have protruding sections of thread (14, 15) at their band edges, which grip each other, and on the wire sections (14, 15) at least one connecting thread (16) which is welded to the wire sections (14, 15). The invention also relates to a method for manufacturing such a text band

Description

TEXTILE BAND, PROCEDURE FOR THE MANUFACTURE OF THE SAME AND DEVICE FOR CARRYING OUT SUCH PROCEDURE DESCRIPTION OF THE INVENTION: The invention relates to a textile band, especially as a base for covers of paper magnets, where the textile band contains threads of structure and in the direction of the width at least partially consists of multiple partial bands one next to the other, which at their band edges are welded. It also relates to a method for manufacturing such a textile web. Textile belts of this type are known in the first line for the transport of paper strips through a paper machine (GB-A 975 750, EP-A-0 665 329, EP-B-0 464 258). Views in the width direction are made up of partial bands, whose width is essentially less than the final width of the textile band. The partial webs extend substantially in a longitudinal direction of the textile web and are formed in such a way that one or more partial web strips are wound in the longitudinal direction of the textile web as well as in a spiral shape transversely to their web. continuation. In one version, the partial bands of structure yarns consist, for example in the form of a fabric. In other versions the structure threads form a carrier, on the ref. 29687 which a fiber fleece is stapled on one side or on both sides, so that the textile band forms a felt. Such felts are especially suitable for the conveyance of paper strips in the pressing part of a paper machine. In the previously known textile webs, the individual partial webs are not rolled in the same way, but they also remain with their band edges side by side, in order to obtain sufficient transverse stability, the edges of the webs are joined together. For this purpose, it is proposed to sew, weld or fuse the edges of the band, for example with an ultrasonic welding (EP-A-0665 329) .Alternatively provided, equipping the edges of the band with ties of It is necessary to make the seam with the help of an interlocking wire placed through the seaming loops. In the known solutions for joining the band edges of the partial bands there is a disadvantage that the structure of the textile web is it deviates markedly in the zone of union of the remaining areas, so that for example the textile band varies in its transparency, which is disadvantageous for the use of the textile band in a paper magic for the quality d e the band or strip of paper. This is especially the case if the edges of the band or bands are sewn together. Sewing threads represent a foreign material, which modifies the character of the article. In addition, the resistance to displacement is not satisfactory. To this it is added that some of the proposals for the union of the edges of the bands are very laborious. The invention proposes the task of creating a joint for the edges of the partial bands of a textile band of the aforementioned type, in such a way that in a simple, preferably mechanically, way it is produced and can be formed in such a way that the Permeability or transportability of the textile web in the joining region does not vary substantially. Another task of the present invention is a method for manufacturing such a joint and a device for carrying out that method. Said first mentioned objective is achieved according to the invention because the partial bands have at their band edges protruding sections of thread that grip one another overlapped, and at least one junction thread is placed over the overlapping area of the wire sections. that is fixed with the thread sections. The basic thought of the invention thus consists in providing on each of the neighboring band edges with overlapping sections of thread and on this laying a connecting thread, which is fitted with the individual wire sections. In this way, a reciprocal union of both band edges occurs. The yarn sections and the connecting yarns can then be arranged in such a density that the permeabild-Lad of the textile band does not vary essentially in the area of the band edges. The connection according to the invention of the two band edges is also carried out mechanically. The manufacture of the union is with this of short duration and of good cost. In the embodiment of the invention, it is provided that the connecting threads are welded on both sides of the textile web together with the wire sections. With this, improved mechanical strength of the joint is obtained. Furthermore, this embodiment is suitable for structure yarns, which are arranged in two layers one on top of the other, and in which protruding yarn sections are formed from different places. The sections of protruding threads can be constructed in different ways. Thus, there is the possibility of constructing the sections of yarn in the form of a sleeve. In a simple embodiment there are all the threads transverse to the edges of the strip formed as ends of protruding threads, which when placed next to one another lead to the edges of the band overlapped with each other, so that that are in a plane. In order not to change the article character of the textile strip as little as possible, it is advisable for the intended purpose, that the connecting thread or the connecting threads be identical with the structure threads running parallel. In addition, the distance of connecting thread must be to the parallel structure yarns that run parallel, to be equal to the distance of these structure yarns from each other, so that the distribution of longitudinal yarns is constant also in the joining zone. The structure yarns are preferably part of a fabric, a knitted fabric, a yarn covering or an intermediate layer within a sheet or the like. Additionally, the textile band can be provided at least on one side with a fiber layer giving it a felt character. Basically there is the possibility of forming the finite textile band, where the front edges are joined by means of a seam. In this case the textile band is structured at least partially by multiple finite partial band strips placed next to each other. Alternatively, it has been provided that the textile web is constructed endlessly, where the manufacturing is carried out in the manner described in GB -A- 975 750, EP-A-0-665 329 and EP-B 464 258 The partial webs are formed at least in part from one or more partial band strips, where each partial web strip is wound in the longitudinal direction of the textile web progressively spirally forward transversely. Alternatively, the partial band strips can also be built endlessly and then placed next to each other. The method according to the invention is characterized in that the partial bands at their band edges are provided with protruding sections of threads, which when placed next to one another lead to the partial bands in a reciprocal overlap, and that on the overlapping areas of the wire sections when at least one connecting thread extends along the edges of the band and is welded with the wire sections, and preferably preferably by ultrasound. Thus the corresponding connecting thread in or directly after laying must be welded with the thread sections, to avoid slippage of the connecting thread. A device for carrying out the described procedure has a yarn-laying apparatus for placing at least one connecting thread on the overlapping sections of yarn at the edges of the band of the partial bands of a textile band. as a welding apparatus for welding the junction thread with the wire sections Such a device is basically designed as a handheld device. For the quality of the union, however, it is advantageous, if a special impulse is provided for the generation of a relative movement between the wire laying apparatus and a welding apparatus on the one hand and on the other hand of the textile band, so that the laying or coating and welding of the wire The connection can basically be carried out mechanically.

For example, the device can have an attachment for receiving the textile bands, where the wire laying device and the welding device are then guided in their movement parallel to that annex. conversely it can also be provided that the wire laying apparatus and the welding apparatus are arranged fixed in the apparatus and an impeller is provided to move the textile web to the two apparatuses. Such a construction is especially possible if the textile web is endless, so that it can be tensioned between two rollers. The welding apparatus must have the capacity to heat the connecting wire and the protruding sections of wire in such a way that an adhesion force develops at the junctions. For this purpose, a magneto of ultrasonic welding is especially suitable. The yarn laying apparatus preferably has a yarn feeder, which is automatically pulled by the apparatus to place the yarn. In the drawing, the invention is represented by means of an exemplary embodiment in a schematic manner. They show: Figure 1 a plan view of a device for manufacturing a textile band; Figure 2 a perspective view of the structure yarns of two partial bands in the region of their band edges with an ultrasonic welding apparatus, and Figure 3 a side view of the arrangement according to Figure 2. The device 1 shown in FIG. 1 shows two distanced rollers 2, 3 which are driven in the same direction. A textile strip 5 is extracted from a supply roller 4. The supply roller 5 is positioned at a certain inclination and when pulling it moves in the direction of the arrow A. This wraps the textile strip 5 in a spiral shape the two rollers 2, 3 until a desired width is reached. This can happen in several layers, when the supply roller 4 after reaching the final width is moved backwards, where the angle of travel is adjusted accordingly. In particular, this is taken from EP A-0 665 329 and EP-B 0 464 258. Depending on the proportion of the extraction speed and the speed of the transverse movement of the supply roller 4, the individual-marked partial strips overlap. for example, with the number 6 or its band edges become one next to the other. Both can be combined with each other, as described in the exemplary embodiments presented in EP-B-0 464 258. Figure 2 shows an enlarged representation of a cut of two neighboring partial bands 6, 7 that have been placed one next to the other of the band strip 5 when pulled from the supply roll 4. The partial bands 6,7 each consist of transverse threads - indicated by the figures 6, 7 in the example - which together form a transverse thread covering . On this, longitudinal threads, indicated with the figures 10 or 11, are placed at equal distances, which each time form a longitudinal thread coatings. The transverse threads 8, 9 and the longitudinal threads 10, 11 are joined at their crossing points, for example by welding, glue or the like. They consist of thermoplastic synthetic materials as they are used for bands of papermaking machines, for example polyamide, polyester etc. They can be constructed as monofilaments or multifilaments. The partial bands 6, 7 have band edges 12, 13 which are indicated by dotted lines. The transverse threads 8, 9 protrude over the band edges 12, 13 and form there wire section - indicated by 14 or 15 - where each time a section of wire 14 or 15 that covers a partial band 6, 7 in a gap between two yarn sections 14 and 15 the other partial band 6 or 7, so that the yarn sections 14, 15 overlap in the direction of the longitudinal yarns 10, 11. The partial bands 6, 7 are thus displaced one from the other by a medium distance between two neighboring transverse threads 8 or 9., so that they are caught between 'yes' in a friction closure. On the yarn sections 14, 15 a tie yarn 16 is placed parallel to the longitudinal yarns 10, 11 and welded with the yarn sections 14, 15. For this, it presents the device 1 in a suitable position between the two rollers 2 , 3 a joining apparatus 17. The joining apparatus 17 has a support beam in it. lower side 18, which extends parallel to the rollers 2, 3 and supports the partial strips 6,7. An ultrasonic welding apparatus of the usual type is arranged above the support beam 18, through which the connecting thread 16 runs. The ultrasonic welding apparatus 19 is so heated, that it is partially plasticized and bonded or it joins the wire sections 14, 15. Prior to the ultrasonic welding apparatus 19, there is a wire laying apparatus 20 with a coating roller 21 and a wire feeder, which is not shown here for the connecting wire 16. From this wire feeder the connecting thread 16 is pressed by the laying roller 21 onto the wire section 14, 15 and then by the plasticization in the ultrasonic welding apparatus it is joined to the wire sections 14, 15. In this way a solid connection between the two partial bands 6, 7 is produced. It is not necessary that the overlap of the wire sections 14, 15 occurs in the manner shown in FIG. 2. It is feasible that only each second transverse thread 8, 9 form the protruding thread section 14, 15 and the partial strips 6, 7 move half distance between two sections of yarn 14, 15. This would reduce the density of the yarn sections 14, 15 to the density of the transverse threads 8, 9. Another possibility consists in that the partial strips 6,7 are not displaced from each other, and alternatively each second transverse thread 8, 9 is provided with a section of protruding thread, so that the sides fronts of the cross wires 8, 9 face each other with a small distance. Also in this case, the density of the wire sections 14, 15 corresponds to the density of the transverse threads 8, 9. As can be seen from FIG. 2, the distance of the band edges 12, 13 is selected in such a way, that the connecting threads 16 have the same distance to the neighboring longitudinal threads 10, 11 as the longitudinal threads 10, 11 from each other- The thread density of the longitudinal threads 10, 11 is therefore constant after the laying of the thread 16 also in the area of the band edges 12, 13 After the final manufacture of the joint in the manner described above the partial bands 6, 7 are covered with a fiber fleece, and this is stapled with the cover of thread. Here, the fiber fleece can also be applied in a similar manner, as shown in FIG. 1 for the textile strip 5.

It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (27)

1. CLAIMS Having described the invention as above, the content of the following claims is claimed as property: l. -Band textile, especially as a base for supports of paper machines, where the textile band contains threads of structure and seen in the direction of the width at least partially is composed of multiple partial bands one next to the other, which in their edges of The bands are welded together, characterized in that the partial webs at their band edges have protruding sections of thread, which grasp if overlapped, and on the wire sections there is a bond wire welded on the wire sections.
2. 2. Textile band according to claim 1, characterized in that the connection threads are welded on both sides of the partial bands in the wire sections.
3. 3. Textile band according to claim 1 or 2, characterized in that the yarn sections are constructed as yarn ends projecting to the band and transverse edges.
4. 4. Textile bandage according to one of claims 1 to 3, characterized in that the yarn sections and the binding yarns exist in such density that the permeability of the textile band is uniform.
5. 5. Textile bandage according to one of claims 1 to 4, characterized in that the union yarns or the union yarn is or are identical to the structure yarns running parallel to them.
6. 6. - Structure belt according to one of claims 1 to 5, characterized in that, the distance of the junction thread neighboring the parallel running structure yarns, is equal to the distance of these structure yarns from each other.
7. 7. Textile bandage according to one of claims 1 to 6, characterized in that the structure yarns are part of a fabric, knitted fabric, thread covering or an intermediate layer.
8. 8. Textile bandage according to one of claims 1 to 7, characterized in that the textile strip on one side has a layer of fibers.
9. 9. Textile bandage according to one of claims 1 to 8, characterized in that the textile band is constructed without end.
10. 10. Textile band according to one of claims 1 to 9, characterized in that the partial bands are formed of several strips of partial band of equal length.
11. 11. Textile band according to one of claims 1 to 10, characterized in that at least partially they are formed by a strip of partial band, which in the longitudinal direction of the textile band is continuously wound transversely in the form of a spiral.
12. 12. - Textile band according to one of claims 1 to 11, characterized in that the partial band strips are constructed without end.
13. 13. - procedure for the manufacture of a textile band, containing structure threads, where the partial band, at least in one direction; it is constructed of multiple partial bands lying next to one another, where the band edges are welded together, characterized in that, the partial bands are provided on their band edges with protruding sections of thread, which when placing the bands one next to each other they overlap each other, and on the yarn sections at least one yarn is attached along the band edges and welded with the yarn sections.
14. 14. - Procedure according to the claim 13, characterized in that the connecting threads and the wire sections are welded by ultrasound ..
15. 15. - Method according to claim 13 or 14, characterized in that the corresponding connecting thread is welded to or directly after laying, with the thread sections.
16. 16. Method according to one of claims 13 to 15, characterized in that, each time a bonding thread is attached on the upper side and one on the lower side of the textile band.
17. 17. - Procedure according to one of claims 13 to 16, characterized in that, the sections of yarn and the connecting yarns are united in such density with each other, that no essential variation of the permeability in that region occurs.
18. 18. Process according to one of claims 13 to 17, characterized in that the yarn sections are constructed as a thread end projecting transversely over the band edges.
19. 19. Method according to one of claims 13 to 18, characterized in that, a connecting thread or connecting threads are used, being identical, with the parallel running structure threads.
20. 20. Method according to one of claims 13 to 19, characterized in that the joining of the band edges is refabricated in such a way that the distance of the connecting wire to the parallel structure threads running parallel is equal to distances of those structure threads from each other.
21. 21. Method according to one of claims 13- to 20, characterized in that the structure yarns are constructed as part of a fabric, knitted fabric, thread covering or an intermediate layer.
22. 22. Device for carrying out the method according to one of claims 13 to 21, characterized in that there is a device for placing a layer of threads to put at least one connecting thread on the overlapping sections of wire at the edges of the band. of the partial bands of a textile band as well as a welding apparatus for welding the junction yarn with the yarn sections.
23. 23. Device according to claim 22, characterized in that an impeller is provided for the generation of a relative movement between the wire laying apparatus and the welding apparatus on the one hand as well as with the textile band.
24. 24. Device according to claim 22 or 23, characterized in that it is provided in position for the stationary take-up of the textile band and is conducted by moving parallel to it a welding apparatus and a wire laying apparatus.
25. 25. Device according to claim 22 or 23, characterized in that the wire laying device and the welding device are fixed in the installation and an impeller is provided to move the textile band to both devices.
26. 26. Device according to one of claims 22 to 25, characterized in that the welding apparatus is constructed as an ultrasound welding device.
27. 27. Device according to one of claims 22 to 26, characterized in that the wire laying apparatus has a wire feeder.