Winding device for winding synthetic yarn

Abstract

The invention relates to a winding device (100) for winding a synthetic thread (12), comprising a traversing device (8) for guiding and traversing the synthetic thread (12) on a plurality of winding stations (4.1-4.3) on rotatable chucks (3.1, 3.2), on which a plurality of empty bobbins (7) are releasably gripped, and a switching cutting device (14) for guiding and cutting the thread, a yarn deflection device (40) for deflecting a yarn end (31) of the yarn cut by the switching cutting device (14) is provided.

Description

[0001] The present invention relates to a winding device for winding synthetic yarns, which has a traversing device for guiding and traversing the synthetic yarn on a rotatable chuck at a plurality of winding stations, according to the preamble of claim 1.

[0002] During the production of synthetic yarns, the yarns made from polymer melts are drawn and processed and then wound to form bobbins. These bobbins are used for storing the yarns and are subsequently fed into further processing. In order to enable the continuous extrusion and production of the yarns during the melt spinning process, the yarns are continuously wound into bobbins without long interruptions.

[0003] For this purpose, a winding machine is used, which has two chucks protruding on a rotatably mounted winding turret. By rotating the winding turret, the chucks can be alternately guided to an operating position for winding the yarn and a switching position for doffing the wound bobbins.

[0004] Once the bobbin reaches a predetermined final diameter, the bobbin with a full package is guided to the switching position. At this position, the yarn is wound around the circumference of the full package to form a tail winding, and is then captured and cut off by the winding chuck held in the operating position. Then, at the operating position, the yarn is wound into a new bobbin.

[0005] The bobbin located at the switching position is removed from the chuck after the chuck is braked and sent to further processing.

[0006] This removal is also called doffing. The loose yarn ends generated on the tail winding must be retained on the circumference of the bobbin as much as possible to avoid any unwanted unwinding during the dropping of the full package from the chuck and subsequent transportation.

[0007] During the bobbin changeover, the loose yarn ends can be directly fixed on the full package on the circumference of the full package. For example, the loose ends can be fixed by an auxiliary device, which fixes the loose yarn ends or the tail winding with a water medium or an oiling medium.

[0008] Such auxiliary devices are known, for example, from DE 44 13 885 A1 and WO 2022 / 023051 A1. Here, during the bobbin changeover, the water and / or oiling medium is applied by an application device in the form of a nozzle and / or a brush. For this purpose, the application device is guided to the tail winding during the bobbin changeover.

[0009] Then the yarn is wetted before cutting to obtain as much adhesion of the yarn on the circumference of the full package as possible. However, the wet yarn of the tail winding may be partially insufficient to be fixed on the surface of the tail winding of the bobbin after cutting and may spread towards the interior space of the winding device due to impact.

[0010] This spreading of the yarn at its end into individual filaments may be disadvantageous for further processing.

[0011] Accordingly, it is an object of the present invention to develop a winding device of a general type for winding yarns in such a way that the spreading of the loose yarn ends during bobbin changeover can be prevented. According to the invention, this object is achieved by a winding device having the features described in claim 1.

[0012] Advantageous refinements of the invention are defined by the features and combinations of features of the dependent claims.

[0013] According to one aspect of the invention, there is provided a winding device for winding synthetic yarns, having a traversing device for guiding and traversing the synthetic yarn on a rotatable chuck at a plurality of winding stations, on which chuck a plurality of yarns can be releasably clamped, and the winding device having a switching cutting device for guiding and cutting the yarn. Furthermore, the winding device has a yarn deflection device for deflecting the yarn ends of the yarn cut by the switching cutting device.

[0014] This has the advantage that, by means of the yarn deflection device, the yarn ends are deflected towards the bobbin to be wound. Furthermore, the yarn deflection device is constructed in such a way that the spreading of the yarn ends into individual filaments can be prevented.

[0015] For example, this can be achieved in that the yarn deflection device has a defined yarn deflection device part which is deflected open in a suitable manner for this purpose.

[0016] According to an improvement of the winding device, the yarn deflection device has a yarn guiding part which extends to the chuck. By means of the yarn guiding part which extends to the chuck, the yarn ends of the tail winding are advantageously deflected towards the surface of the bobbin, so that the yarn ends can be better fixed on the bobbin.

[0017] Furthermore, the yarn guiding part does not cause the yarn ends to spread out into the individual filaments which make up the yarn.

[0018] The yarn guiding part projects from the yarn deflection device at a predetermined spacing, so that the spreading of the yarn ends during impact on the yarn guiding part can be avoided as much as possible.

[0019] According to a further improvement of the winding device, the yarn guiding part has a first wing wall part and a second wing wall part which define an angle in the range of 60° - 80°. The yarn guiding part preferably has an angled part which has the first and second wing wall parts.

[0020] The wing wall parts enclose an angle which can be in the range of 60 - 80°.

[0021] The angled yarn guiding part is positioned towards the chuck such that the yarn end in contact with the yarn part is deflected by it as smoothly as possible, and the component below is additionally protected.

[0022] Both prevent contamination of the component below. Additionally, the yarn end is also prevented from unraveling again into its individual filaments.

[0023] According to a further improvement of the winding device, the first wing wall part and the linearly extending wall part define an angle in the range of 130° to 160°, and / or the second wing wall part and the linearly extending wall part define an angle in the range of 100° to 120°.

[0024] By means of the wing wall part protruding from the linear wall part, the yarn end can be deflected smoothly while protecting the component below from possible contamination and / or the impact of the sizing agent splashed off from the yarn end.

[0025] The wing wall part provides both component protection and smooth deflection of the yarn end.

[0026] According to a further improvement of the winding device, the yarn deflecting device has an outer layer made of antistatic material and / or a grounding part for dissipating static charges.

[0027] Furthermore, the advantage provided by the yarn deflecting device is that electrostatic charging of the yarn can be prevented, especially during doffing and fixing through the free yarn end of the bobbin.

[0028] Electrostatic charging is particularly disadvantageous for further processing and subsequent unwinding of the yarn, for example, for texturing and / or weaving into textiles.

[0029] According to an improvement of the winding device, the yarn deflecting device is a plate made of metal. The yarn deflecting device preferably has a panel made of a plate, and the plate is made of a metal that can prevent electrostatic charging of the yarn. If the plate is correspondingly grounded in the winding device, the plate can also be used as a grounding part at the same time.

[0030] According to a further improvement of the winding device, the yarn guiding part is arranged adjacent to the yarn fixing application device. The advantage brought about by this is that the yarn guiding part can interact with the yarn fixing application device.

[0031] The function of the yarn fixing application device is to apply a sufficient amount of liquid on the coil surface, especially on the tail winding, to fix the yarn end.

[0032] This prevents the yarn end from possibly unwinding again in an adverse manner, which may occur, for example, in the case of unfixed yarn and during doffing and / or transportation.

[0033] This situation should be avoided as much as possible because it will first reduce the number of bobbins and also their quality.

[0034] According to a further improvement of the winding device, the yarn deflection device is releasably mounted by means of a part of the frame of the winding device. This provides the advantage that a contaminated yarn deflection device can be easily removed from the winding device. In addition, this facilitates the necessary maintenance work on the winding device.

[0035] The device according to the invention will be explained in more detail below with reference to the drawings, based on an exemplary embodiment of the winding device according to the invention, wherein:

[0036] Figure 1 A top view schematically illustrates a first exemplary embodiment of a winding device having a yarn deflection device according to the invention, and

[0037] Figure 2 schematically illustrates a side view from Figure 2 of the exemplary embodiment.

[0038] Figure 1 and Figure 2 schematically illustrates a winding device 100 according to the invention having a yarn deflection device 40 according to the invention.

[0039] In addition, a reference coordinate system with X - Y - Z axes is specified in Figure 1 and Figure 2 where the X - direction represents the longitudinal direction of the winding device 100, the Y - direction represents the width direction of the winding device 100, and.

[0040] Figure 1 A top view schematically illustrates the winding device 100 having a yarn deflection device 40 according to the invention, and Figure 2 shows a schematic side view of the winding device 100 according to the invention having a yarn deflection device 40 according to the invention, wherein the yarn deflection device 40 is continued and shown in dashed lines in the part where it is blocked by the structural elements (e.g., the chuck 3.1 and the bobbin 13) of the winding device 100.

[0041] In addition, the illustrated embodiment of the winding device 100 according to the invention has a winding turret 2 which supports two chucks 3.1 and 3.2 rotatably mounted in a protruding manner.

[0042] The chucks 3.1 and 3.2 are arranged offset by 180° relative to each other on the winding turret 2 and can be driven by two spindle motors 19.1 and 19.2 on the rear side of the winding turret 2. The winding turret 2 is rotatably mounted in the frame 1 and is coupled to a turret drive 10. By means of the turret drive 10, the chucks 3.1 and 3.2 can be alternately pivoted by the winding turret into a winding position and a switching position.

[0043] In the operating position, the yarn 12, preferably a synthetic yarn 12 made of multiple filaments, is wound onto an empty bobbin 7 fixed to the chuck, as Figure 1 shown.

[0044] In the winding position, the chucks 3.1 and 3.2 alternately interact with the pressure roller 5.

[0045] In Figure 1 and Figure 2 the exemplary embodiment shown, the frame 1 has a total of three identical winding stations 4.1 to 4.3 arranged adjacent to each other to wind a corresponding number of empty bobbins 7.

[0046] Each of the winding stations 4.1 to 4.3 is constructed identically, so only the winding station 4.1 will be described in detail below.

[0047] From Figure 1 and Figure 2 it can be seen that the winding station 4.1 has a traversing device 8 by means of which the yarn 12 is traversed, with the result that the yarn 12 can be deposited on the empty bobbin 7 in a cross-wound manner, for example.

[0048] The overhead thread guide 11 for supplying the yarn 12 to the traversing device 8 is located upstream of the traversing device 8 in the yarn running direction. In the winding station 4.1, the traversing device 8 interacts with the pressure roller 5, with the result that the yarn to be wound onto the empty bobbin 7 is deposited in the correct position.

[0049] The pressure roller 5 is rotatably mounted on a pressure roller bracket 6. In addition, the pressure roller bracket 6 is pivotally mounted on the frame 1. To traverse the yarn 12, the traversing device 8 has a traversing means adapted to guide the yarn 12 back and forth. This traversing means can be, for example, a so-called double rotor. Different traversing means, such as a traversing means with a finger thread guide, are also suitable.

[0050] A switching cutting device 14 is provided on the frame 1 between the chucks 3.1 and 3.2, by means of which the yarn 12 at the winding station 4.1 and the adjacent yarns 12 at the winding stations 4.2 and 4.3 are guided and then cut during bobbin switching.

[0051] Figure 1 and Figure 2The bobbin change is shown, with the result that the winding chuck 3.1 is in the change position together with a plurality of wound bobbins 13, and the chuck 3.2 is in the winding position to wind a new bobbin.

[0052] As shown by the double arrow, the switching cutting device 14 is pivotally arranged between the chucks 3.1 and 3.2. In the change position of the winding chuck 3.1 (shown in Figure 1 ), the yarn 12 has been cut, with the result that a loose yarn end 31 is formed on the bobbin 13.

[0053] This type of switching cutting device 14 is known and is described, for example, in DE 10 2009 007 759 A1.

[0054] To fix the loose yarn end 31 to the surface of the full bobbin 13, a yarn fixing application device 17 is provided. The yarn fixing application device 17 is known, for example, from WO 2022 / 023051 A1 and will not be explained in detail here.

[0055] To prevent fluff formation and to prevent the loose yarn end 31 of the yarn 12 from unraveling into its filaments, a yarn deflection device 40 according to the invention is provided on the winding device 100.

[0056] As Figure 1 shown, the yarn deflection device 40 has a yarn guiding part 42 which extends to the chuck 3.2 in its change position.

[0057] Via its yarn guiding part 42, the yarn deflection device 40 has a possibility by which the yarn end 31 can be held without fluff formation and without the yarn 12 unraveling into its filaments. Before this happens, the yarn end 31 can then be fixed to the tail winding 29 of the full bobbin 13 by the yarn fixing application device 17.

[0058] The yarn deflection device 40 is releasably mounted on the rear wall of the frame 1 of the winding device 100, with the result that if required, the yarn deflection device 40 can be removed in order to be able to access, for example, the chucks 3.1 and 3.2 and / or the yarn application device 17 and / or the switching cutting device 14.

[0059] To improve the deflection and guidance of the yarn end 31, the yarn deflection device 40 has a yarn guiding part 42 which extends to the chuck 3.1, as Figure 1 shown.

[0060] The position of the yarn guiding part 42 is selected such that the loose yarn end 31 is guided towards the surface of the full bobbin 13, to its tail winding 29.

[0061] In addition, the yarn guiding section 42 has the advantage that the components located below, such as the bracket 18 of the yarn fixing application device 17 and the moving actuator 16, are protected from objects that may be knocked off and dropped from the yarn end 31, such as the sizing agent of the yarn and / or the filaments that may come off the yarn 12.

[0062] The yarn guiding section 42 has a first wing wall section 45 and a second wing wall section 26, which are angled at a predetermined angle β with respect to the substantially linearly extending wall section 44 of the yarn deflecting device 40. The angle β preferably has an angular range of 60 to 80°.

[0063] The first wing wall section 45 and the linearly extending wall section 44 define an angle α1, which can be configured in the range of 130° to 150°. The second wing wall section 46 of the yarn deflecting device 40 and the linearly extending wall section 44 define an angle α2, which can be configured in the range of 100° to 120°.

[0064] In an embodiment not shown, the yarn deflecting device 40 can also have a yarn guiding section 42 that is not formed by deflecting the linearly extending wall section 44, but can also be formed, for example, by adding a corresponding L-shaped cross-section welded to the linear wall section 44.

[0065] To avoid electrostatic charging of the yarn 12 on the bobbin 13, the yarn deflecting device 40 is preferably provided with an outer layer 43 made of a material that cannot be electrostatically charged, such as metal. Additionally or alternatively, a grounding portion 41 for dissipating static charges can be provided on the yarn deflecting device 40.

[0066] The grounding portion 41 can be grounded on the frame 1 and / or through a corresponding equipment grounding portion provided at the location where the winding device 100 is arranged.

[0067] Figure 1 The yarn deflecting device 40 is shown in a larger scale, so that it can be better distinguished from the frame 1 of the winding device.

[0068] The yarn deflecting device 40 is preferably made of metal, which preferably forms a panel. The panel can be a plate. The plate thickness of the yarn deflecting device can preferably be 3 mm to 5 mm.

[0069] From Figure 1 It can be seen that, in addition, the yarn guiding section 42 is arranged adjacent to the action position of the fixing application device.

[0070] The present invention has been explained using an exemplary embodiment of the winding device 100, in which at least three winding stations 4.1 to 4.3 for winding the yarn are provided.

[0071] The present invention is basically not limited to a specific number of winding stations. Therefore, the present invention is applicable to both a winding machine 100 having a single winding station and a winding machine having a plurality of winding stations.

[0072] List of reference numerals

[0073] 1 Frame

[0074] 2 Winding turret

[0075] 3.1, 3.2 Chuck

[0076] 4.1 - 4.3 Winding stations

[0077] 5 Pressure roller

[0078] 6 Pressure roller bracket

[0079] 7 Empty bobbin

[0080] 8 Traversing device

[0081] 9 Traversing drive

[0082] 10 Winding turret drive

[0083] 11 Upper thread guide

[0084] 12 Yarn

[0085] 13 Bobbin

[0086] 14 Switching cutting device

[0087] 16 Moving actuator

[0088] 17 Yarn fixing application device

[0089] 18 Bracket

[0090] 19.1, 19.2 Spindle motor

[0091] 28 Fluid dispenser

[0092] 29 Tail winding

[0093] 31 Yarn end

[0094] 40 Yarn deflection device

[0095] 41 Grounding part

[0096] 42 Yarn guiding part

[0097] 43 Outer layer

[0098] 44 Wall part

[0099] 45 First wing wall part

[0100] 46 Second wing wall part

[0101] 100 Winding device

Claims

1. A winding device (100) for winding a synthetic yarn (12), the winding device (100) having a traversing device (8) for guiding and traversing the synthetic yarn (12) on rotatable chucks (3.1, 3.2) at a plurality of winding stations (4.1–4.3), a plurality of empty bobbins (7) being releasably held on the chucks, and the winding device (100) having a switching cutting device (14) for guiding and cutting the yarn, characterized in that A yarn deflection device (40) is provided for deflecting the yarn end (31) of the yarn cut by the switching cutting device (14).

2. The winding device (100) according to claim 1, characterized in that, The yarn deflection device (40) has a yarn guiding portion (42) extending to the chuck.

3. The winding device (100) according to at least one of the preceding claims 1 or 2, characterized in that, The yarn guiding portion (42) has angled wing wall portions (45, 46) and a straight extending wall portion (44).

4. The winding device (100) according to at least one of the preceding claims, characterized in that, The yarn guiding portion (42) has a first wing wall portion (45) and a second wing wall portion (46) which define an angle (β) in the range of 60° to 80°.

5. The winding device (100) according to claim 4, characterized in that, The first wing wall portion (45) and the straight extending wall portion (44) define an angle (α1) in the range of 130° to 150°, and / or the second wing wall portion (46) and the straight extending wall portion (44) define an angle (α2) in the range of 100° to 120°.

6. The winding device (100) according to at least one of the preceding claims 4 or 5, characterized in that The yarn deflection device (40) has an outer layer (43) made of antistatic material and / or a grounding portion (41) for dissipating static charges.

7. The winding device (100) according to at least one of the preceding claims 5 or 6, characterized in that, The yarn deflection device (40) is a plate made of metal.

8. The winding device (100) according to at least one of the preceding claims, characterized in that, The yarn guiding portion (42) is arranged adjacent to the yarn fixing application device (17) with respect to the yarn.

9. The winding device (100) according to at least one of the preceding claims, characterized in that, The yarn deflection device (40) is releasably mounted by a part of the frame of the winding device (100).

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