Method and apparatus for splicing multiple strands of spun yarn

Abstract

The invention relates to a method and a device for unwinding a plurality of yarns in a plurality of winding points on a winding machine, wherein the yarns are removed from stationary suction devices after being spun off from a plurality of spinners and are transported to waste containers, being guided together as a yarn group. The object of the invention is to keep the operating costs as low as possible. To this end, a guide device and a lower stationary suction device are arranged below the spool pins of the winding machine, the yarn pieces being grasped by the guide device in a yarn section before entering the suction device and being supplied as a thread loop to the lower stationary suction device.

Description

[0001] This application is a divisional application of the invention patent application filed on April 20, 2018, with application number 201880026819.1 (international application number: PCT / EP2018 / 060190) and entitled "Method and apparatus for splicing multi-strand spun yarn". Technical Field

[0002] This invention relates to a method for splicing multiple wires in multiple winding stations of a winding machine, and to a device for splicing multiple wires in multiple winding stations of a winding machine. Background Technology

[0003] In the production of synthetic yarns during melt spinning, conventionally, multiple yarns are spun side-by-side in parallel from each other at the spinning position. After yarn processing according to the yarn type, these yarns are wound into a bobbin by winding spindles in multiple winding stations of a take-up and winder. Such melt spinning apparatus is disclosed, for example, in WO 1999 / 037835A1.

[0004] If a malfunction occurs during this process, a suction device is installed below the spinning equipment. This device continuously receives the thread produced by the spinning nozzles and discharges it into a waste container. This ensures that the extrusion of the thread at the spinning nozzles does not need to be interrupted.

[0005] Once a fault in the process has been rectified, the wire must be spliced ​​again at the winding station of the take-up and winder. Traditionally, this is done by using a manually guided suction gun to pick up the wire bundles, which are then guided by the operator for splicing. Therefore, the operator must detach the wire bundle from the fixed suction device and retrieve it using the manually guided suction gun. The suction gun is then guided to the take-up and winder, where an auxiliary device located at the take-up and winder picks up the wire bundle and supplies it to the winding station for splicing. In this respect, the conventional method currently used for splicing multiple wires at multiple winding stations is very intensive in terms of operation. Summary of the Invention

[0006] Therefore, the object of the present invention is to provide a method and apparatus for splicing multiple wires in multiple winding stations of a winding machine, wherein the wire assembly can be supplied to the winding station as quickly and reproducibly as possible.

[0007] Another object of the present invention is to automate as much as possible the methods and equipment for splicing multiple spun threads.

[0008] According to the method of the invention, this objective is achieved in that the wire bundle is captured in the wire portion by a guiding device before entering the suction device, and is supplied as a wire loop to a lower fixed suction device located below the winding spindle.

[0009] Therefore, the device according to the invention achieves this objective, wherein the winding machine has a lower fixed suction device below the winding spindle, and wherein the lower suction device cooperates with a movable guide device through which the wire bundle received by the upper suction device can be supplied as a wire loop to the lower suction device.

[0010] This invention is based on the discovery that the yarn received by the fixed suction device is guided together at the convergence point in a ray-like manner as it is drawn from the spinning nozzle. Here, individual yarns are guided with a yarn spacing that varies according to height. To take advantage of this effect, the invention employs a lower fixed suction device below the winding spindle, in which the yarn bundle is acquired by a guiding device. The guiding device directly grasps the yarn bundle in the portion of the yarn bundle that has already been guided in almost bundle form, before it enters the upper suction device. Once the yarn bundle has been conveyed to the lower fixed suction device, the yarn supplied in a ray-like manner can advantageously be captured and spliced ​​in the area of ​​the winding station.

[0011] Therefore, the device according to the invention has a lower fixed suction device arranged below the winding spindle of the take-up and winder. In this case, the lower suction device cooperates with a movable guide device through which the wire bundle received by the upper suction device can be supplied as a wire loop to the lower suction device. Here, manual operation is not required to splice the wire bundle in the winding station of the take-up and winder.

[0012] To allow for the controlled acquisition and capture of the wire assembly via the lower suction device, according to an advantageous variation, the strands of the wire loop are cut by a cutting device. In this case, the wire strands established between the upper suction device and the guide device are supplied to the cutting device. Therefore, the cutting device is directly supplied to the lower suction device.

[0013] To minimize the linear tension generated in the wire assembly during ring forming, the guiding device has freely rotatable guide rollers held on a movable roller holder. Here, the wire assembly can be guided on the guiding device without slippage.

[0014] Because the wire assembly typically requires opposing resistance during cutting to prevent any yielding, the present invention preferably incorporates a guide roller that is guided between a collection position and a pickup position by a roller carrier, and wherein the guide roller cooperates with the lower suction device in the pickup position. This allows for improved cutting and pickup of the wire assembly via the lower suction device by directly utilizing a fixed environment.

[0015] To allow engagement of the roller carrier with the line assembly from the outside of the winding station, the roller carrier is additionally formed by a pivot arm and a guide carriage, wherein the pivot arm is arranged on a vertically movable guide carriage, wherein the pivot arm carries the guide roller at its free end, wherein the guide carriage is guided along a guide rail by a carriage drive, and wherein the pivot arm is controllable by a pivot drive.

[0016] To enable splicing operations at the winding station, the take-up and winder has an auxiliary device that allows the wire bundle to be captured in the wire section before entering the lower suction device and then fed to the winding station. Due to the height difference between the lower suction device and the auxiliary device, the spacing established between the individual wires in the wire bundle can advantageously allow for the selection of wires for splicing at the winding station.

[0017] Therefore, the method and apparatus according to the invention for splicing multiple wires at multiple winding stations of a take-up and winder offer the main advantage of achieving relatively short interruption times after a fault during melt spinning. Wire splicing at the winding stations of the take-up and winder can be performed automatically using a predetermined control algorithm. Therefore, manual activity during melt spinning can be focused solely on fault recovery. Attached Figure Description

[0018] Referring to the accompanying drawings, the method according to the invention for splicing multiple wires in multiple winding stations of a winding machine will be described in more detail below based on an exemplary embodiment of the equipment.

[0019] In the attached diagram:

[0020] Figure 1.1 as well as Figure 1.2 A side view schematically illustrates an exemplary embodiment of the device according to the invention under various operating conditions.

[0021] Figure 2.1 as well as Figure 2.2 schematically shown Figure 1.1 Front view of exemplary implementations under different operating conditions

[0022] Figure 3 schematically shown Figure 1.1 Side view of an exemplary implementation during operation Detailed Implementation

[0023] Figure 1.1 and Figure 2.1 Exemplary embodiments of the device according to the invention are illustrated schematically in several views. Figure 1.1 An exemplary implementation is shown in a side view, while Figure 2.1An exemplary embodiment is illustrated in a front view. Unless otherwise specified in one of the figures, the following description applies to both figures. This exemplary embodiment is integrated into a melt spinning apparatus for producing synthetic yarn. The melt spinning apparatus includes a spinning device 1, a cooling device 2, a guide roller device 5, and a take-up and winding machine 6, arranged one below the other. It should be noted in principle that further processing units, such as finishing devices, mixing devices, texturing devices, and / or crimping devices, may be included in this melt spinning apparatus. Similarly, the configuration of the guide roller device 5 is shown as an example.

[0024] The spinning apparatus 1 has a heated spinning beam 1.1, which supports a plurality of spinning nozzles 1.2 on its underside. In this exemplary embodiment, the spinning nozzles 1.2 are configured as so-called dual nozzles, such that two threads are extruded from each spinning nozzle 1.2. The spinning nozzles 1.2 are connected to a spinning pump 1.3. The spinning pump 1.3 is configured as a multi-stage pump and is connected to a melt source (not shown here), such as an extruder, via a melt lateral feed device 1.4.

[0025] A cooling device 2 is arranged below the spinning equipment 1. This cooling device has a blower chamber 2.2 and a cooling channel 2.1. The cooling channel 2.1 can be formed, for example, by a cooling cylinder arranged within the blower chamber 2.2. The blower chamber 2.2 is connected to an air conditioning unit (not shown here). The cooling channel 2.1 has a permeable wall, allowing air conditioning air flowing out of the blower chamber 2.2 to enter the cooling channel 2.1 to cool the extruded filaments. The cooling channel 2.1 is connected to a gravity channel 2.3 on its lower side. Within the gravity channel 2.3, each spinning nozzle 1.2 is provided with a common wire guide 3 below the cooling channel 2.1. Through the common wire guide 3, the filaments extruded from multiple filaments are separated and combined into filament bundles.

[0026] Below the gravity channel 2.3 is the guide roller assembly 5, which has a plurality of protruding guide rollers 5.1 and 5.2 held on the bracket 5.4. The guide rollers 5.1 and 5.2 are each equipped with a guide roller drive device 5.3 on the rear side of the bracket 5.4.

[0027] The bracket 5.4 of the guide roller device 5 is supported on the frame 6.10 of the winding machine 6.

[0028] The take-up and winder 6 has a rotatably mounted winding tower 6.3 that carries two winding spindles 6.2 mounted in a projecting manner. The winding spindles 6.2 are connected to a spindle drive 6.4. The winding tower 6.3 can be rotated via a tower drive 6.5, so that the winding spindles 6.2 can pivot alternately between the operating area and the conversion area.

[0029] In the operating area, the winding spindle 6.2 cooperates with multiple winding stations 6.1. In this exemplary embodiment, a total of four winding stations 6.1 are formed on the take-up and winder 6. The winding stations 6.1 have the same structure and each has a deflection roller 6.9 and a traverse device 6.7. The deflection roller 6.9 is arranged downstream of the guide roller device 5 to distribute the wire to the winding station 6.1. The traverse device 6.7 has a traverse component for each wire for guiding the wire back and forth. To lay the wire on the circumference of the winding drum, contact pressure rollers 6.6 are provided that extend parallel to the winding spindle 6.2.

[0030] To enable the retrieval of extruded thread in case of a malfunction, a fixed suction device 4 is installed above the guide roller assembly 5. This device, referred to herein as the upper suction device 4, has a thread collector 4.3 to collect the thread assembly 9 in case of a malfunction and supply it to a waste container (not shown in more detail here) via a suction opening 4.1 and a waste pipe 4.2. For this purpose, the thread collector 4.3 is equipped with a cutting blade 4.4, which creates thread ends on the thread assembly 9 for suction into the suction opening 4.1.

[0031] To splice the wire of the winding assembly 9 in the winding station 6.1, the take-up and winding machine 6 is equipped with a lower suction device 7. The lower suction device 7 is arranged below the winding spindle 6.2. The lower suction device 7 has a suction opening 7.1 and a waste pipe 7.2, which cooperate to pick up the wire assembly and discharge it into a waste container. The suction opening 7.1 is equipped with a cutting device 7.3. The cutting device 7.3 is preferably formed by one or more blades, which allows the wire assembly to be cut with the least possible cutting resistance.

[0032] The upper suction device 4 and the lower suction device 7 cooperate with the guide device 8 to transfer the wire assembly from the upper suction device 4 to the lower suction device 7.

[0033] In this exemplary embodiment, the guide device 8 is formed by a freely rotatable guide roller 8.1, which is held on a pivot arm 8.2. The pivot arm 8.2 is pivotable laterally in the direction of line travel via a pivot drive device 8.3. The pivot arm 8.2 and the pivot drive device 8.3 are arranged on a guide carriage 8.4. The guide carriage 8.4 can be moved back and forth on a vertically oriented guide rail 8.5 by a carriage drive device 8.6. For this purpose, the guide rail 8.5 is arranged laterally relative to the end side of the take-up and winder 6.

[0034] exist Figure 1.1 and Figure 2.1The diagram shows the melt spinning apparatus in operation, in which yarn bundle 9 is continuously discharged into a waste container via the upper suction device 4. The guide roller assembly 5 and the take-up and winding machine 6 are in a splicing mode to receive yarn bundle 9. For this purpose, the movable guide roller 5.1 of the guide roller assembly 5 has been moved to the splicing position, as shown... Figure 1.1 As shown by the dashed lines. The take-up and winding machine 6 has an auxiliary device 6.8, which in this case is formed by a movable roller bracket 6.8 that carries the deflection roller 6.9. The roller bracket 6.8 is held in the extended position (shown by the dashed lines). Now, the guide device 8 is guided to the collection position. In the collection position, the guide carriage 8.4 is held in the upper position on the guide rail 8.5. The pivot arm 8.2 with the guide roller 8.1 pivots to the wire travel of the wire group 9 via the pivot drive device 8.3, wherein the guide roller 8.1 directly captures the wire group 9 in the wire portion directly above the suction device 4. Once the wire group 9 has been guided around the circumference of the guide roller 8.1, the guide carriage 8.4 is activated by the carriage drive device 8.6. The guide carriage 8.4 leaves the collection position and is guided to the lower acquisition position at the lower end of the guide rail 8.5. During this process, a wire loop 9.1 is formed at the guide roller 8.1. The yarn extruded from the spinning nozzle 1.2 is still received by the suction device 4 and wound around the guide roller 8.1. This situation occurs in... Figure 1.1 and Figure 2.1 It is shown in dashed lines.

[0035] Figure 1.2 and Figure 2.2 The melt spinning apparatus is shown in the state where the lower suction device 7 has received and guided the yarn bundle 9. For this purpose, the guiding device 8 is in the lower receiving position, wherein the yarn bundle is supplied to the cutting device 7.3 and the suction opening 7.1 of the lower suction device 7 via a pivot arm 8.2 on the guide roller 8.1. The cutting device 7.3 cuts the strands of the yarn loop 9.1 that are guided between the suction device 4 and the guide roller 8.1. In this case, after the yarn bundle 9 has been cut, the resulting end is received by the suction opening 7.1 of the lower suction device 7. This state is... Figure 1.2 and Figure 2.2 As shown in the image.

[0036] The pivot arm 8.2, equipped with guide roller 8.1, is guided to the intermediate position. To splice the wires in the winding station 6.1, the auxiliary device 6.8 is now activated. Deflector rollers 6.9, held offset from each other on the movable roller support 6.8, are held in the splicing position, allowing the acquisition of wires guided side-by-side at a certain wire spacing to be selected by a simple pushing motion, and the wires to be conveyed to the winding station. The vertical distance between the auxiliary device 6.8 and the lower suction device 7 is adjusted such that a predetermined wire spacing exists between the wires of the wire group 9 in the area of ​​the auxiliary device 6.8.

[0037] Finally, the guide roller 5.1 of the guide roller device 5 is transferred from the splicing position to its operating position, so that the melt spinning device is ready for continuous production of the synthetic line. Figure 3 The melt spinning apparatus in normal operating condition is shown. The yarn of yarn group 9 is wound into a bobbin.

[0038] The auxiliary device for selecting yarn groups during splicing at the winding station, shown in the above exemplary embodiments, is an example. For the method and device according to the invention, the cooperation between the upper and lower fixed suction devices, which have guiding devices suitable for forming yarn loops, is important. As guiding devices, wire guides or wire rods can be used instead of guide rollers.

Claims

1. An apparatus for splicing multiple spun yarns in multiple winding stations (6.1) of a take-up and winder (6), wherein the winding stations (6.1) are arranged side by side with each other along a protruding winding spindle (6.2), the apparatus having a spinning device (1) having multiple spinning nozzles (1.2) for spinning yarn, the apparatus having an upper fixed suction device (4) above the take-up and winder (6) by which yarn is drawn from the spinning nozzles (1.2), supplied as a yarn bundle (9), and transported to a waste container, characterized in that, The winding machine (6) has a lower fixed suction device (7) below the winding spindle (6.2), and the lower fixed suction device (7) cooperates with a movable guide device (8) through which the wire group (9) received by the upper fixed suction device (4) can be supplied as a wire loop (9.1) to the lower fixed suction device (7); the winding station (6.1) has a deflection roller (6.9) arranged above the lower fixed suction device (7).

2. The device according to claim 1, characterized in that, The lower fixed suction device (7) has a cutting device (7.3) that can cut the strands of the loop (9.1) guided by the guiding device (8).

3. The device according to claim 1 or 2, characterized in that, The guiding device (8) is formed by a rotatable guide roller (8.1) which is held on a movable roller bracket.

4. The device according to claim 3, characterized in that, The guide roller (8.1) can be guided by the roller bracket between the collection position and the acquisition position, and the guide roller (8.1) cooperates with the lower fixed suction device (7) in the acquisition position.

5. The device according to claim 4, characterized in that, The roller support is formed by a pivot arm (8.2) and a guide carriage (8.4), wherein the pivot arm (8.2) is arranged on the guide carriage (8.4) which is capable of vertical displacement, wherein the pivot arm (8.2) carries the guide roller (8.1) at its free end, wherein the guide carriage (8.4) is guided along a guide rail (8.5) by a carriage drive device (8.6), and wherein the pivot arm (8.2) is controllable by a pivot drive device (8.3).

6. The device according to claim 2, characterized in that, The winding machine has an auxiliary device (6.8) through which the wire group can be captured in the wire portion before entering the lower fixed suction device (7) and can be supplied to the winding station (6.1).

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