MXPA00006995A - Spinning machine with multiple spinning positions, each with drafting arrangement for unspun fibrous band, includes individual modular suction unit for each position - Google Patents

Abstract

Each suction tube (30) comprises a modular unit (33) with rotary compressor (31) and motor drive (32). It is located close to longitudinal supports (21, 22) for the drafting (i.e. stretching) units.

Description

'WINDING MACHINE WITH A MULTITUDE OF SPINNING SITES' DESCRIPTION OF THE INVENTION The invention relates to a spinning machine with a plurality of spinning sites comprising in each case a drawing mechanism with associated caking zone for stretching and caking at least one fiber tape, where in each case several areas of caking are connected to a common suction tube. A spinning machine of this type is state of the art by DE 197 22 772 A1. In each case, two caking zones are connected through a common suction tube with a negative pressure channel of the spinning machine. To uniformize the suction effect in the individual caking zones, the central negative pressure channel can be constituted by several partial channels, the suction air of each individual partial channel being evacuated separately. A common rotary compressor is associated to all partial channels. However, despite the partial channels, the single rotary compressor associated with the negative pressure channel does not have the capacity to provide equal suction effects in the individual caking zones. On the other hand, the variable suction effects result in different caking of the blended fiber formations. The caking of a blended formation of fibers preferably already stretched but not yet subjected to spinning rotations serves the purpose of bundling the blended formation of fibers by tying the marginal fibers more closely to the core of the blended formation. By this it is possible to largely avoid the known spinning triangle at the point where the spinning torsion is applied to the yarn being formed. 'The spun yarn is firmer, less hairy, and generally looks smoother. It is evident that the different suction effects in the individual caking zones produce yarns of different pilosity, which in an extreme case can cause the quills already finished to be wound up to be discarded. The object of the invention is to avoid the aforementioned disadvantages and to standardize the suction effect in the individual caking areas. The task is solved by associating to each suction tube an operative unit constituted by a rotary compressor and a drive motor that is arranged in the area of a beam that supports the drafting mechanisms. These beams extend in the direction of the machine immediately next to the drafting mechanisms. Consequently, the operating unit is arranged very close to the caking areas, so that only very small losses due to throttling occur due to the very short suction tubes. Due to the fact that each individual suction tube is associated with its own rotary compressor, in each suction tube the same negative pressure prevails. Only so many spinning sites are associated with each suction tube that they still allow for an equal negative pressure in the individual caking zones. Preferably a suction tube, and therefore a rotary compressor, is associated in each case to eight spinning sites. The suction facilities are, so to speak, self-sufficient in the constructive sense, so that there is the possibility of subsequently equipping the existing spinning machines with the operating units according to the invention. Preferably, a profiled tube with suction grooves associated with the individual capping areas is associated with the suction tube, which extends through several spinning sites. A profiled tube of this kind, which, for example, extends through a section of the machine, is a component of easy manufacture, which is preferably constituted by synthetic material which can be easily assembled., eventually even a posteriori. When such a profiled tube is combined together with the suction tube and the operating unit consisting of the rotary compressor and the drive motor to form an equipment kit, it is then possible to retrofit spinning machines without capping zones with these. Conveniently the operating unit constituted by the rotary compressor and the drive motor is disposed in a common box. This can happen so that a spiral box belonging to the rotary compressor is combined with the motor housing. The operating unit, in particular in the case of retrofitting a spinning machine, can be mounted on the spar supporting the drafting mechanisms. In this case, it can conveniently be a bank of drafting mechanisms to which the individual drawing mechanisms are fixed in a known manner. However, a negative pressure channel can also be used as a spar, which in any case exists in each spinning machine, to which the operating unit can be fixed and possibly also the drafting mechanisms. Other advantages and features of the invention are apparent from the following description of an exemplary embodiment. 1 shows a side elevational view partly cut away on a drawing mechanism of a spinning site with an associated caking zone, for which an operating unit consisting of a rotary compressor and a drive motor is provided, FIG. a view in the direction of the arrow II of figure 1 on the caking areas of several spinning sites belonging to a suction tube as well as an operating unit according to the invention, all other parts of the invention being omitted. Figure 1. The spinning machine shown only partially in Figures 1 and 2, preferably a continuous ring spinning machine is constituted in the longitudinal direction of the machine of a multitude of sections of the machine. A section of these sketched in figure 2 is associated, for example, with six spinning sites 1 to 6, where the spinning sites 2 and 3 are not represented. Naturally, the number of spinning sites associated with a section of the machine can vary. The spinning site 7 which can be furthermore recognized in FIG. 2 is already associated with an adjacent machine section. By means of a spinning site 1 to 7, a drafting mechanism 8 is provided which is known per se and which in the present case is associated with a capping zone 9, whose configuration is itself random. The capping zone 9 conveniently abuts the drafting mechanism 8. Each drafting mechanism 8 contains several pairs 10, 11 and 12 of cylinders, three in the present case, which in a known manner are constituted by a lower cylinder driven uninterrupted in the longitudinal direction of the machine as well as by an associated pressure cylinder to each spinning site 1 to 7. The drawing mechanisms 8 are fed in the supply direction A in each case a fiber tape or pre-thread 13, which in the drawing mechanism 8 is stretched to obtain the desired yarn fineness. Following the last pair 12 of cylinders, which is known as the pair of output cylinders of the drafting mechanism 8, there is then a blended formation 14 of fibers already stretched but in the present case still free of torsion. This interpenetrating fiber formation 14 passes through the mentioned caking zone 9 and is bundled therein, so that the blended formation of fibers becomes narrower and less hairy, so that in total the substance is better utilized, which finally leads to to a greater resistance. On the outlet side, the caking zone 9 is limited by a clogging point 15 from which the thread 16 is given to spin the spinning rotation. In the direction B of the supply, the wire 16 is fed to a torsion element, not shown, for example a spindle for ring continuous. The clogging point 15 acts as a torsion barrier with respect to the spinning rotation. Respectively to each two adjacent drawing mechanisms 8 there is associated a load bearing 17 accommodating the pressure cylinders belonging to two adjacent spinning sites 1 to 6, cylinders which are grouped in what is known as twin pressure cylinders. In Figure 1 it is possible to recognize the support rod 18 of the load support 17, as well as a first entry funnel 19 for the blended fiber assembly or pre-thread 13, associated with the first pair 10 of cylinders. The individual drawing mechanisms 8 are disposed over what are known as rulers 20 which form a kind of sleepers. The rules 20 for their part are fixed to a continuous beam 21 in the longitudinal direction of the machine, which in the present case is configured as a bank of drafting mechanisms. Naturally, the individual drawing mechanisms 8 can alternatively also be fixed to a channel 22 of continuous negative pressure in the longitudinal direction of the machine, which then acts as a spar. As can be appreciated particularly from figure 2, the capping zone 9 contains a profiled tube 23 which extends along a section of the machine, in the case shown along the spinning sites 1 to 6. On the upper side of the profile tube 23, a suction groove 24 extending substantially in the conveying direction of the fiber composite formation 14 and up to the clogging point 15 is placed at each spinning site 1 to 6. The latter is important so that the caking effect is not lost again before applying a spinning torsion. Starting from the spinning site 7 begins an adjacent profiled tube that is only sketched, which likewise extends along a section of the machine. The individual shaped tubes 23 are fastened at their two ends to the aforementioned rules 20 so that they can be easily disassembled in the way that is only sketched. For each location 1 to 7 of spinning, a relatively narrow conveyor belt 25, which covers the respective suction slot 24 and has an air-permeable configuration, is associated with the respective capping zone 9. Conveniently the conveyor belt 25 can be a thin weave belt with very fine pores. The outer contour of the profiled tube 23 is configured as a sliding surface for the conveyor belt 25, the conveyor belt 25 tightly clinging to the profiled tube 23 and sliding around the profiled tube 23. A clamping cylinder 26 is used to drive the conveyor belt 25, which with the profiled tube 23 forms the aforementioned clogging point 15. The clamping cylinder 26 in turn obtains its drive from the cylinder of pressure of the pair 12 of cylinders, and specifically through a transmission cylinder 27 of which only the primitive circle of a gear wheel is represented. Each profiled tube 23 has a suction opening 28, so that there is in each case a suction opening 28 per section of the machine, in the present case for the spinning sites 1 to 6. The profiled tube 23 is connected to a suction tube 30 via a connection connection piece 29 applied to the profiled tube 23, so that the suction tube 30 can be removably but nevertheless sealed in the connection piece 29 of connection.

Each suction tube 30 is associated with its own rotary compressor 31, which is directly connected to a drive motor 32. The rotary compressor 31 and the drive motor 32 form an operating unit 33 conveniently housed in a common housing 34. This common case 34 may contain a spiral case for the rotary compressor 31 as well as the motor case for the delivery motor 32. This operating unit 33 is arranged in the area of the stringer 21 and is preferably fixed to the stringer 21. Alternatively, the operating unit 33 can also be attached to the negative pressure channel 22. The arrangement is carried out in such a way that each rotary compressor 31 is associated only with a pipe 23 profiled on one side of the machine. This allows the operating unit 33 to be configured together with the suction tube 30 and the profiled tube 23 as a kit 35 of equipment for later equipment. As already described, this equipment kit 35, if necessary, can be detached from the connection socket 29, so that a profiled tube 23 can also be dismantled without disassembling an operative unit 33, for example when a replacement is to be carried out. Wear of conveyor belt 25.

Claims (5)

1. CLAIMS 1. Spinning machine with a multitude of spinning sites comprising in each case a stretching mechanism with associated caking zone for stretching and caking at least one fiber belt, in each case several caking zones are connected to one another. common suction pipe, characterized in that each suction tube is associated with an operating unit constituted by a rotary compressor and a drive motor that is disposed in the area of a beam that supports the drafting mechanisms. Spinning machine according to claim 1, characterized in that the suction tube is associated with a profiled tube with suction grooves associated with the individual caking zones, which extends along several spinning sites. Spinning machine according to claim 2, characterized in that the operating unit together with the suction tube and the shaped tube forms an equipment kit for later equipment. Spinning machine according to one of claims 1 to 3, characterized in that the operating unit is arranged in a common box. 5. Spinning machine according to one of claims 1 to 4, characterized in that the operating unit is mounted on the spar supporting the drafting mechanisms.