JP2005520938A - Centrifugal spinning device - Google Patents

Abstract

The present invention is a spinning device, provided with a centrifugal spinning element that is rotatably supported around a rotation axis, and the centrifugal spinning element is disposed in a centrifuge bottom and an area of the centrifuge bottom. A centrifuge head, an electromagnetic driving device attached to the centrifuge neck, and a yarn guide which is supported so as to be movable in parallel with the rotation axis and enters the centrifugal spinning element through the centrifuge neck. It relates to a type having a tube. According to the present invention, the winding guide tube (9) penetrating the centrifuge neck (24) of the centrifugal spinning element (3) is movably disposed on the yarn guide tube (7). 7) and / or the centrifugal spinning element (3) is movable in the axial direction, whereby an inner wall (25) of the centrifugal spinning element (3) is formed on the yarn package (15) starting in the region of the centrifuge bottom (26) It has been proposed that it can be formed with a cup roll.

Description

  Various spinning methods are known in connection with the production of short fiber yarns.

  In addition to ring spinning and open-end spinning, for example, centrifugal spinning is a spinning method that has been known for a long time. In this case, in centrifugal spinning, there is basically a distinction between two types of spinning modes, so-called “one-stage spinning” and so-called “two-stage spinning”.

  In both spinning modes, first of all, the fiber bundles stored in the spinning pot or the fiber rovings provided as roving bobbins as the feed material are drawn according to the desired yarn count by the draft mechanism and can be moved in the axial direction. Is conveyed into a centrifugal spinning element that rotates at a high rotational speed via a yarn guide tube supported by the shaft. In this case, the feed material flowing out from the opening of the yarn guide tube forms a yarn leg, is applied to the inner wall of the centrifuge, and is entrained by the inner wall of the centrifuge. That is, the fiber material acquires twist by the rotation of the yarn legs that rotate with the centrifugal spinning element.

  The yarns formed by twisting are deposited on the inner wall of the centrifuge by a yarn guide tube supported so as to be traversable and movable in the axial direction, thereby forming a yarn package, a so-called “spun cake”.

  In this case, in one-step spinning, the centrifuge speed and the feed rate of the feed are harmonized with each other, so that the yarn deposited as a spinning cake already has the final twist and the subsequent In this work step, for example, the yarn guide tube may be provided, or may be rewound on a rewinding tube introduced into the centrifugal spinning element from below. The spinning cup formed during the rewinding process is then rewound by a winder installed later in the production process to form a large-capacity cheese.

  However, in connection with centrifugal spinning, not only two types of spinning methods are known, but also a large number of spinning devices that are formed partially differently.

  For example, a centrifugal spinning device is disclosed in German Patent Application No. 4208039. This centrifugal spinning device has a tubular centrifugal spinning element supported by a magnetic bearing. This centrifugal spinning element has an electromagnetic centrifuge driving device arranged at the center. The centrifugal spinning device formed in this way is accessible not only from above but also from below, so that the wound tube is shown in German Offenlegungsschrift DE 4208039. As can be introduced into the centrifugal spinning element from below, or movably arranged in the yarn guide tube, for example as disclosed in DE 19523835 In this case, it is introduced into the centrifugal spinning element from above. Despite being well accessible to such tubular spinning centrifuges, this spinning centrifuge has the significant disadvantage of being relatively high energy consuming due to its structure. That is, a relatively unfavorable energy usage is caused by the position of the drive having a rotor in the region of the maximum diameter of the tubular centrifugal spinning element.

  A particularly advantageous energy use is when a so-called “pot centrifuge” is used, ie when a centrifugal spinning element with a neck-like attachment to which an electromagnetic drive of a spinning centrifuge is attached is used. can get.

  A spinning centrifuge formed in this way is known, for example, from WO 98/11284.

  In this known centrifugal spinning device, the rewinding tube is introduced into the centrifugal spinning element through the centrifuge opening located on the side opposite the centrifuge neck, and the finished spinning cup is removed through the same centrifuge opening. It is. In order to guarantee an orderly rewinding of the yarn package deposited on the inner wall of the centrifugal spinning element with respect to the rewinding tube run into the rewinding position, in this known centrifugal spinning device, from below to above The spinning cake is deposited. That is, at the end of the spinning process, when the yarn guide tube reaches the upper end position near the bottom of the spinning centrifuge, the rewinding process by the rewinding tube is started. In this case, the yarn package is rewound from the top to the bottom, i.e., starting at the leading end of the winding tube and wound on the winding tube.

  However, in such a centrifugal spinning device, a great difficulty occurs when a so-called “winding collapse” occurs during the rewinding process. In such cases, it is often the case that an already partially wound rewind tube can be removed from the centrifugal spinning element, indicating that the yarn package residue still attached to the inner wall of the centrifugal spinning element in the lower region. Minutes stop. This means that in such cases, the relevant spinning centrifuge must be stopped and first cleaned.

  Furthermore, with this known centrifugal spinning device, the produced spinning cup was also found to be a drawback. This is because the winding direction of such a spinning cup is different from that of a spinning cup manufactured by a ring spinning machine.

  The formation of such centrifugal spinning cups often presents greater difficulties since the automatic cheesewinder preparation equipment that is placed later in the production process is typically adjusted to ring spinning cups.

  Starting from the above-mentioned known prior art, the object of the present invention is to provide a centrifugal spinning device that does not have the above-mentioned disadvantages and that can produce a spinning cup that is not particularly different from a ring spinning cup. It is.

  This problem is solved according to the invention by a spinning device as claimed in claim 1.

  Advantageous configurations of the invention are the subject of the dependent claims.

  By means of the spinning device according to the invention it is easily achieved to avoid the disadvantages of the known spinning devices. That is, the spinning cup formed after the rewinding process is formed in the same way as a spinning cup manufactured by, for example, a ring spinning machine, and can therefore be processed without difficulty with conventional winding technology. Furthermore, in the centrifugal spinning device formed according to the invention, the last deposited yarn layer of the spinning cake is always reachable, so that, for example, after yarn breakage during the spinning process or after winding. It is always possible to introduce or start a rewinding process from the outside after the winding body collapses during the rewinding process. In this case, the yarn secondary system adjusted at the start of such an external rewinding process is relatively short, so that the formed spinning cup can then be fed to the winder almost without any residue. Furthermore, the spinning cup formed after the start of the rewinding process from the outside can always be removed from the centrifugal spinning element without any problem. That is, the yarn package residue that remains in the centrifugal spinning element due to the collapse of the winding body never interferes with the spinning cup doffing process, and in some cases for the start of the subsequent second rewinding process from the outside. Remains reachable.

  As described in claim 2, in an advantageous configuration, a sensor device is provided for monitoring the running feed. The sensor device, which is preferably positioned between the draft mechanism and the yarn guide tube, is connected via a signal line to a corresponding control device, preferably a work location computer. Further supply of fiber material to the centrifugal spinning element is interrupted and the rewinding process is started. However, in an alternative configuration, as described in claim 3, the sensor device may be arranged below the centrifugal spinning element, in which case the rotating thread leg is monitored. In this case as well, the sensor device is connected to the work location computer via a signal line. By this work location computer, in the case of yarn breakage, the supply of fiber material to the centrifugal spinning element is stopped and the rewinding process is started.

  Furthermore, as described in claim 4, in an advantageous configuration, a thread dissociation device is provided. This yarn dissociating device is defined and can be applied to the winding cone of the yarn package, in this case together with a centrifuge for the winding tube provided in the winding position, arranged in the yarn guide tube Start the rewinding process of the rotating yarn package. The yarn release device is used not only after yarn breakage during the spinning process but also after roll collapse during the winding process. In both cases, the yarn release device is applied to the winding cone of the yarn package that rotates with the spinning centrifuge, thereby initiating the rewinding process.

  Furthermore, in an advantageous configuration, the doffing of the produced spinning cup takes place through a centrifuge opening located on the side opposite the centrifuge neck (claim 5). Thus, the neck region of the centrifugal spinning element can be kept relatively small. This has a particularly positive influence on the energy consumption of the spinning device.

  In the following, embodiments of the invention will be described in detail with reference to the drawings.

  FIG. 1 schematically shows a centrifugal spinning device, generally designated 1, of a centrifugal spinning machine not shown in detail. Such a centrifugal spinning device 1 equipped with a so-called “pot centrifuge” is known in principle, and is disclosed in relatively detail, for example, in the pamphlet of WO 98/11284.

  Such a centrifugal spinning device 1 advantageously has a centrifugal spinning element 3 that is rotatably supported in a spinning housing 2. The centrifugal spinning element 3 is supported by a bearing 4 and is driven by an individual motor via an electromagnetic driving device 5. In this case, the bearing 4 is advantageously formed as a magnetic bearing, for example a permanent magnetic bearing.

  Furthermore, the centrifugal spinning device 1 has a yarn guide tube 7 that can be introduced into the centrifugal spinning element 3. The yarn guide tube 7 is connected to a drive device 8 which is only schematically shown. The driving device 8 imparts a traverse motion to the yarn guide tube 7 and simultaneously moves the yarn guide tube 7 in the axial direction with respect to the centrifugal spinning element 3.

  On the yarn guide tube 7, for example, a rewind winding tube 9 is movably supported on a hollow piston rod of a pneumatic cylinder 10 that surrounds the yarn guide tube 7. In this case, the pneumatic cylinder 10 is connected to a source of compressed air (not shown) via a corresponding pneumatic line to which a valve, for example a 2-port 2-position valve 22, is connected. As shown in FIG. 1, the valve 22 is connected to the work location computer 19 via the control line 21.

  As shown in FIG. 1, the rewinding tube 9 is positioned at the rest position 11 with respect to the yarn guide tube 7 via the pneumatic cylinder 10 during the normal spinning process, for example to start the rewinding process In order to do this, it is possible to move to the winding position 12 indicated by the solid line.

  Furthermore, the centrifugal spinning device 1 has a sensor device 13 for detecting yarn breakage.

  The sensor device 13 for monitoring the feed material 18 traveling is advantageously positioned below the draft mechanism 6 and connected via a signal line 20 to a control device 19 specific to the spinning site.

  An alternative configuration of such a sensor device is shown in broken lines in FIG. In this case, the sensor device 13A similarly connected to the work location computer via the signal line 20A is formed as a light scanner, for example, and monitors the rotation of the rotating thread leg.

  Furthermore, in order to start the rewinding process after, for example, yarn breakage during the spinning process or after roll collapse during the rewinding process, a yarn dissociating element 14 is provided. In this case, the yarn dissociating element 14 includes a cutting edge 16 that can be applied to the winding cone portion 29 of the yarn package 15 and a yarn guide contour body 17 that grips the cutting edge 16 from above in the axial direction. ing. The cutting edge 16 and the thread guide contour 17 can be moved in parallel to the centrifuge inner wall 25 via the drive device 23. As is clear from FIG. 1, the drive device 23 for the yarn dissociating element 14 is connected via a control line 30 to a control device 19 unique to the spinning location, a so-called “work location computer”. Can be defined and controlled.

Equipment features:
A fiber bundle drawing device, for example, a draft mechanism 6 disposed above the centrifugal spinning element 3 is supplied with a fiber bundle from a spinning cup (not shown) or supplied with a feed material 18 from a flyer bobbin (not shown). Supplied. This feed material 18, for example, roving, is drawn correspondingly to the desired count and guided into the centrifugal spinning element 3 via the yarn guide tube 7. There, the feed material 18 forms a rotating yarn leg 28 and is applied to the inner wall 25 of the rotating centrifugal spinning element 3, in this case obtaining a twist. That is, the yarn formed based on the twist is positioned on the inner wall 25 of the centrifugal spinning element 3 by the yarn guide tube 7, thereby forming a prescribed yarn package, so-called “spinning cake 15”. During the spinning process and thus during the formation of the yarn package 15 starting in the region of the centrifuge bottom 26 of the centrifugal spinning element 3, the yarn guide tube 7 is oscillated up and down via a drive device 8 and simultaneously continuously centrifuges. It is lowered in the direction of the opening 27. As a result, the spun yarn is temporarily stored on the inner wall 25 of the centrifugal spinning element 3 like a so-called “cop roll”.

  When the yarn package 15 achieves the defined adjustable amount, the winding process is started. That is, the yarn guide tube 7 is first moved to the top dead center next to the traverse stroke of the yarn guide tube 7 by the driving device 8, and then the rewinding tube 9 is moved from the rest position 11 by the pneumatic cylinder 10. Then, it is moved to the rewind position 12 in the area of the rotating yarn leg 28. At the time of crossing with the rotating yarn leg 28, the yarn is restrained by the rewinding tube 9, thereby causing a rewinding process. At the same time, a roving yarn stopping device (not shown) arranged in the area of the draft mechanism 6 for interrupting further supply of the roving yarn 18 is controlled via the control device 19.

  Next, the spinning cup formed by rewinding is duffed through the centrifuge opening 27 and supplied to, for example, a winder installed later.

  When yarn breakage occurs during the spinning process, such yarn breakage is immediately detected by the sensor device 13; 13A and directly notified to the control device 19 via the signal line 20; 20A. Next, the control device 19 immediately activates the coarse yarn stopping device, and the yarn guide tube 7 is moved to the top dead center next to the traverse stroke. Next, the control device 19 operates the direction control valve 22 via the signal line 21 and operates the drive device 23 of the yarn dissociation device 14 via the signal line 30. Thereafter, the directional control valve 22 causes the pneumatic cylinder 10 to push the rewinding tube 9 from its rest position 11 to the rewinding position 12, while the driving device 23 causes the yarn dissociating device 14 to be parallel to the inner wall 25. And run into the centrifugal spinning element 3.

  Further, the yarn dissociating device 14 is applied to the wound cone portion 29 of the yarn package 15 at the cutting edge 16. When the cutting edge 16 is applied to the winding cone 29, the yarn loop is dissociated from the yarn package 15 that rotates together with the centrifugal spinning element 3. This yarn loop is wound around the rewinding tube 9, thereby starting the rewinding process. Although the cutting edge 16 of the yarn dissociating device 14 acts near the inner wall 25 of the centrifugal spinning element 3, however, in this case several winding layers of the spinning cake 15 are arranged below the cutting edge 16. It is not always possible to avoid that. During the rewinding process, the wound body layer is lifted in the direction of the rewinding tube 9 by the yarn guide contour 17 and delivered to this rewinding tube 9. In this way, winding around the yarn dissociating device 14 is avoided.

  During this rewinding process, the yarn package 15 originally deposited on the inner wall 25 of the centrifugal spinning element 3 is rewinded on the rewinding tube 9 already provided at the rewinding position 12, and in this case, the spinning cup is Form.

  The spinning cup (not shown) is then removed through the centrifuge opening 27 and delivered to a subsequent textile machine, preferably a winder, for subsequent processing.

  The yarn dissociating device 14 is also used when a roll collapse occurs during the rewinding process, that is, when only a part of the yarn package 15 can be wound around the rewinding tube 9.

  Even in such a case, after the spinning cup partially wound is duffed and the new rewinding tube 9 is positioned at the rewinding position on the yarn guide tube 7, the yarn dissociating device 14 is driven by the driving device. 23 is again entered into the centrifugal spinning element 3 to start a new rewinding process.

It is the schematic of the centrifugal spinning apparatus used for a centrifugal spinning machine.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Centrifugal spinning device, 2 Spinning housing, 3 Centrifugal spinning element, 4 Bearing, 5 Drive device, 6 Draft mechanism, 7 Thread guide tube, 8 Drive device, 9 Rewinding tube, 10 Pneumatic cylinder, 11 Rest position, 12 Winding position, 13, 13A Sensor device, 14 Thread release device, 15 Thread package, 16 Cutting edge, 17 Thread guide contour, 18 Feed material, 19 Control device, 20, 20A Signal line, 21 Control line, 22 Valve, 23 drive unit, 24 centrifuge neck, 25 centrifuge inner wall, 26 centrifuge bottom, 27 centrifuge opening, 28 thread leg, 29 winding cone, 30 control line

Claims (5)

A spinning device, provided with a centrifugal spinning element supported rotatably about a rotation axis, wherein the centrifugal spinning element comprises a centrifuge bottom and a centrifuge neck disposed in a region of the centrifuge bottom. And an electromagnetic drive device attached to the centrifuge neck and a yarn guide tube that is supported so as to be movable in parallel with the rotation axis and penetrates into the centrifugal spinning element through the centrifuge neck. In the form of
In the yarn guide tube (7), a rewind winding tube (9) penetrating the centrifuge neck (24) of the centrifugal spinning element (3) is movably arranged, and the yarn guide tube (7) and / or the centrifugal tube is moved. The spinning element (3) is movable in the axial direction, whereby the yarn package (15) starting in the region of the centrifuge bottom (26) is placed on the inner wall (25) of the centrifugal spinning element (3). A spinning device characterized in that it can be formed.   A sensor device (13) is provided for monitoring the feed material (18) that travels, the sensor device (13) being adapted to cause the start of the rewinding process when the yarn breaks during the spinning process. The spinning device according to claim 1.   A sensor device (13A) is provided for monitoring the rotating yarn leg (28), and the sensor device (13A) causes the start of the rewinding process when the yarn breaks during the spinning process. The spinning device according to claim 1.   2. Spinning according to claim 1, wherein a yarn dissociation device (14) is provided which allows the start of an external rewinding process after yarn breakage during the rewinding process or after collapse of the winding body during the rewinding process. apparatus.   The spinning device according to claim 1, wherein the spinning cup formed after the rewinding process can be taken out through a centrifuge opening (27) located on the opposite side of the centrifuge bottom (26) of the centrifugal spinning element (3). .

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