Winding machine for yarn and method for winding yarn

Abstract

The invention relates to a winding machine (1) for a yarn (2) and to a method for winding a yarn (2). The winding machine (1) is provided with a bobbin creel (3), a rotation driving device (4) and a traversing device (5). A bobbin (6) can be held in a rotatable manner about a bobbin creel axis (LSp) by means of the bobbin creel (3), and the bobbin (6) can be rotated by means of the rotary drive (4) in order to wind a yarn (2) on the bobbin (6) in order to form a bobbin (7), the yarn (2) being reciprocally movable by means of the traversing device (5) in the direction of the bobbin creel axis (LSp) between two end positions in order to form the bobbin (7). In order to simplify the automatic removal of the bobbin (7) from the winding machine (1), the winding machine (1) has at least one transverse force generating device (8) by means of which a transverse force acting on the bobbin surface (9), in particular on the yarn end (10), at least partially in the longitudinal direction of the bobbin creel axis (LSp) can be generated.

Description

[0001] The invention relates to a winding machine for yarns, as described in the preamble of patent claim 1, in particular comprising a creel, a rotary drive, and a traversing device, wherein a bobbin can be held rotatably about a creel axis by means of the creel, wherein the bobbin can be rotated by means of the rotary drive in order to wind the yarn onto the bobbin, wherein the yarn for forming a bobbin can be moved back and forth between two end positions in the direction of the creel axis by means of the traversing device.

[0002] The invention further relates to a method for winding a yarn, as described in the preamble of patent claim 13, wherein, in particular, in order to wind the yarn onto a bobbin to form a package, the bobbin is rotated by means of a rotary drive, wherein, in this process, the bobbin is held rotatably about a creel axis by means of a creel stand, wherein the yarn for forming the package is moved back and forth between two end positions in the direction of the creel axis by means of a traversing device.

[0003] A device of this type for winding yarn with a pivotable creel is known from DE 10 2016 004 563 A1. The creel has two mutually opposing clamping discs for clamping the bobbin. Each clamping disc is rotatably mounted on the creel, so that the bobbin clamped between the clamping discs is rotatably mounted on the creel. The creel axis is formed by the two rotational axes of the two clamping discs. The creel is equipped with a drivable drive roller, on which the bobbin rests when winding the yarn and is used to drive the bobbin during winding. In addition, an auxiliary device is provided, which is located upstream of the drive roller in the yarn stroke and is used to guide the yarn during bobbin switching. During bobbin switching, the yarn is cut by a cutting device.

[0004] After the yarn is cut, the loose yarn end rests on the bobbin surface. During subsequent bobbin processing, for example when the bobbin rolls down to a resting position on the winder, the yarn often becomes tangled. This resting position is formed, for example, by a slightly descending track of the subsequent conveyor, on which the fully wound bobbin is temporarily stored until it is removed from the winder. This processing, in particular the rolling process, can result in loose yarn ends of up to 1.5 meters hanging from the bobbin and / or already wound into the winder. Due to this hanging yarn end, subsequent automation / automatic bobbin removal is impossible or only possible with very complex mechanics and / or control requirements.

[0005] For this purpose, for example, the operator has to tie the yarn ends in a manual step (e.g. tying a knot) before they are automatically removed. This represents a high level of complexity and also constitutes an obstacle to automation concepts.

[0006] A winding machine is known from DE 43 43 873 A1, with which the yarn end can be marked by a marking strip. However, the marking strip is only used to mark the yarn end, so there is still the risk that the loose yarn end hangs on the bobbin and / or is entangled by the winding machine.

[0007] The present invention is based on the object of providing a winding machine for yarn and a method for winding yarn which reduce and / or eliminate the problems of the prior art. In particular, the intention is to simplify the automatic removal of bobbins from the winding machine.

[0008] This object is achieved by a winding machine for yarn according to claim 1 .

[0009] Further advantageous embodiments are the subject matter of the dependent claims.

[0010] More specifically, the object is achieved in that the winding machine has at least one transverse force generating device, by means of which a transverse force acting on the package surface, in particular on the yarn end, at least partially in the longitudinal direction of the creel axis can be generated.

[0011] By means of this transverse force, the upper yarn layers of the package can be displaced relative to one another, thereby achieving a mechanical interlocking of these yarn layers. This prevents the uppermost yarn layer, in particular the yarn end, from detaching from the package surface and then becoming hung on the package and / or becoming entangled, for example, in the winding machine, thereby enabling simple automation of package handling, both within the winding machine and during subsequent transport, for example, making it possible to easily remove the package from the winding machine.

[0012] Advantageously, the transverse force generating device comprises at least one rotatably mounted roller that can be pressed against the bobbin surface. The transverse force is generated when the roller is pressed against the bobbin surface. To this end, the creel and the transverse force generating device are movable relative to one another. In particular, the creel can be pivoted toward the transverse force generating device to generate contact and then pivoted away from the transverse force generating device to release the contact. Preferably, the transverse force can be generated by rotating the roller. For example, the rotation of the roller can be actively generated by means of an electric motor.

[0013] When the roller's axis of rotation is angled with respect to the plane formed by the creel axis and the center of the roller's axis of rotation, it is possible to achieve an advantageous passive rotation of the roller and generate a transverse force with the roller. In this case, when the roller is pressed against the bobbin surface, it is driven by the bobbin's rotation and, due to its tilted position, also generates a transverse force. Since the bobbin can be driven for winding the yarn, the overall number of drives or actuators in the winding machine can be reduced.

[0014] The appropriate transverse force is achieved when this angle lies between 0° and 20°, preferably between 3° and 10°. In this case, the mutual displacement of the yarn layers on the upper portion of the bobbin is precisely dimensioned, enabling mechanical interlocking of these layers without unnecessary damage to the bobbin surface. Only those layers necessary for interlocking and securing the yarn ends are displaced relative to each other, while the other layers beneath them remain undamaged. This ensures that once the interlocked layers are released, the bobbin can be easily unwound during further processing. During the displacement of the upper bobbin layers, these layers are also displaced transversely in the longitudinal direction of the bobbin axis due to the transverse force. Whether these layers are displaced to the right or left, with respect to the direction of rotation of the bobbin surface in the area of ​​contact between the bobbin surface and the rollers, depends on the direction of rotation of the rollers and the angle of their axis of rotation relative to the plane in question.

[0015] In a preferred embodiment of the winding machine, the transverse force generating device is movably coupled to the winding machine frame by means of a spring / damper unit. This allows the magnitude of the transverse force to be adjusted more precisely. Furthermore, even with different bobbin diameters, the same or at least very similar transverse forces can be generated, despite the fact that the kinematic mechanism for generating contact between the bobbin and the transverse force generating device is of a very simple embodiment and the bobbins can only be positioned relative to the transverse force generating device at a specific spacing, rather than at a plurality of different spacings.

[0016] It can be advantageous if the roller contact surface is spherical. In this case, the roller contact surface is curved outward. The roller diameter at the ends is smaller than in the center. The spherical design of the roller contact surface (tread) ensures that tangential contact between the roller contact surface and the package surface can be achieved even with the simple kinematic mechanism described above for generating contact between the package and the transverse force generating device, and with varying package diameters. This tangential contact is important for controlling the transverse force or ensuring that the transverse force has the desired magnitude. In contrast, contact between the edge of the roller contact surface and the package surface can lead to uncontrollable pressure peaks, resulting in undesirable damage to the package surface.

[0017] In a preferred alternative embodiment of the winding machine, the roller contact surface is cylindrical. In this case, the roller contact surface has a constant diameter. Cylindrical rollers are easier to manufacture than rollers with spherical contact surfaces. However, to ensure tangential contact between the roller contact surface and the package surface, rollers with cylindrical contact surfaces require more complex kinematic mechanisms for generating contact between the package and the transverse force generating device, particularly to ensure this tangential contact is achieved for different package diameters.

[0018] In an advantageous embodiment of the winding machine, the transverse force generating device comprises two rotatably mounted rollers, each of which can be pressed against the package surface. In this case, the mutual displacement of the yarn layers on the package is more easily controlled, thereby achieving a more reliable mechanical interlocking of these yarn layers. In addition, the risk of unnecessary damage to the package surface is further minimized.

[0019] Furthermore, preferably, each of the two rollers is rotatably mounted on a common support. The support is mounted on the machine frame so as to be rotatable about a support axis that is arranged substantially parallel to the creel axis. This allows the two rollers and their rotational axes to be aligned relative to the bobbin when contact is established between the rollers and the bobbin surface. During this process, the support is rotated so that two planes (each formed by the center of the creel axis and the rotational axis of the respective roller) intersect the respective contact points between the bobbin and the respective roller. This advantageously ensures that, during bobbin-roller contact, both rollers rest on the bobbin surface with their centers located thereon. This makes it possible, in particular, to use rollers with cylindrical contact surfaces without the risk of the edge of the contact surface of one roller pressing against the bobbin surface during bobbin-roller contact. In this case, approximately parallel to the creel axis is understood to mean that, when arranging the support axis, deviations of a few degrees from the parallel arrangement of the creel axis, for example up to 3°, can be tolerated, as long as it is still ensured that no undesirable pressure peaks arise between the rollers and the package surface when they contact.

[0020] It may be advantageous when the rotation axis of one or both rollers has an angle with respect to a plane formed by the creel axis and the center of the rotation axis of the one roller, the value of which is between 0° and 20°, preferably between 3° and 10°, wherein the rotation axis of the other of the two rollers has an angle with respect to a plane formed by the creel axis and the center of the rotation axis of the other roller, the value of which is between 0° and -20°, preferably between -3° and -10°.

[0021] Since the angle of the axis of rotation of one of the two rollers has a positive value, and the angle of the axis of rotation of the other roller has a negative value, the upper yarn layer is displaced by one of the two rollers toward one end face of the bobbin and by the other roller toward the other end face of the bobbin, so that overall the desired interlocking of the yarn layers occurs. The angles are determined as follows. With respect to a line extending perpendicularly from the respective center toward the creel axis, the angle of the axis of rotation of one of the two rollers is obtained by rotating the line extending parallel to the creel axis to the clockwise, while the angle of the axis of rotation of the other roller is obtained by rotating the line extending parallel to the creel axis to the counterclockwise. It is important that the positive and negative angles define mutually opposite directions of rotation. Angles of less than 90° relative to the plane in question are considered here.

[0022] Advantageously, the axis of rotation of one of the two rollers has an angle with respect to the plane formed by the creel axis and the center of the axis of rotation of the one roller, the value of which is between 0° and 20°, preferably between 3° and 10°, while the axis of rotation of the other of the two rollers is arranged substantially parallel to the creel axis.

[0023] In this case, rollers with an axis of rotation arranged approximately parallel to the creel axis do not cause transverse forces acting on the bobbin surface. In this case, "approximately parallel to the creel axis" is understood to mean that when arranging the axis of rotation, deviations of a few degrees from the parallel arrangement of the creel axis, for example up to 3°, can be tolerated, as long as it is still ensured that no significant transverse forces acting on the bobbin surface occur. In this case, rollers with an axis of rotation arranged approximately parallel to the creel axis are primarily used for aligning the support.

[0024] The winding machine preferably has a switching actuator. The switching actuator can be used to position the creel into a winding position, in which the yarn can be wound onto a bobbin. The switching actuator can be used to position the creel into a switching position, in which the bobbins can be fed to a downstream conveying device. The switching actuator can be used to position the creel into a yarn end securing position, wherein in this yarn end securing position of the creel, the bobbin surface can be pressed against the at least one roller.

[0025] In this way, in particular, the generation of transverse forces acting on the bobbin surface can be easily automated. Furthermore, the same actuators can be used for this purpose as those used to guide the bobbins to the subsequent conveying device. Thus, existing actuators can be used to generate transverse forces acting on the bobbin surface.

[0026] The object on which the invention is based is also achieved by a method for winding a yarn according to claim 13 .

[0027] More specifically, in this case, the object is achieved by generating a transverse force acting on the package surface, in particular on the yarn end, at least partially in the longitudinal direction of the creel axis, so that a mutual displacement of the upper yarn layers of the package and thus a mechanical interlocking of these yarn layers occurs.

[0028] It is thereby prevented that the uppermost yarn layer, in particular the yarn end, becomes detached from the bobbin surface and then becomes hung on the bobbin and / or becomes entangled, for example, by the winder, thereby enabling simple automation of the bobbin handling both within the winder and during subsequent transport, for example, enabling easy removal of the bobbin from the winder.

[0029] In a preferred embodiment of the method, the transverse forces acting on the package surface are generated during package deceleration. By decelerating the package, the transverse forces acting on the package surface are limited in magnitude upwards and set to an optimal value for the mutual displacement of the yarn layers on the upper portion of the package and thus for the mechanical interlocking of these yarn layers.

[0030] More preferably, the yarn used to create the yarn end is severed before the transverse forces acting on the package surface are generated. This yarn end is then no longer subject to the tension that existed in the yarn before the yarn was severed. This at least simplifies, or even makes possible, the mutual displacement of the yarn layers on the upper portion of the package and the mechanical interlocking of these yarn layers, in particular the yarn ends.

[0031] The winding machine and the method for winding a yarn are particularly used in texturing machines in which the yarn is also provided by means of a bobbin, drawn from the bobbin, and texturized by false twisting during a heat treatment in order to be subsequently wound up again on a bobbin. Furthermore, the yarn is drafted by means of the texturing machine.

[0032] Hereinafter, preferred embodiments will be described in more detail with reference to the accompanying drawings.

[0033] Figure 1 A first embodiment of a winding machine is schematically shown in a side view.

[0034] Figure 2 A first embodiment of a winding machine is schematically shown in a top view.

[0035] Figure 3 A second embodiment of a winding machine is schematically shown in a side view.

[0036] Figure 4 A second embodiment of a winding machine is schematically shown in a bottom view.

[0037] according to Figures 1 to 4The winding machine 1 for a yarn 2 comprises, among other things, a creel 3, a rotary drive 4, and a traversing device 5. A bobbin 6 can be held rotatably about a creel axis LSp by means of the creel 3. To wind the yarn 2 onto the bobbin 6 to form a bobbin 7, the bobbin 6 can be rotated by means of the rotary drive 4. To form the bobbin 7, the yarn 2 can be moved back and forth in the direction of the creel axis LSp between two end positions by means of the traversing device 5.

[0038] The creel 3 has two opposing clamping discs, specifically a first clamping disc 3.1 and a second clamping disc 3.2, between which the bobbin 6 can be clamped. Each clamping disc 3.1, 3.2 is rotatably mounted on the creel 3, so that the bobbin 6 clamped between the clamping discs 3.1, 3.2 is rotatably mounted on the creel 3. The creel axis LSp is formed by the two rotational axes of the two clamping discs 3.1, 3.2. The creel 3 is equipped with a drivable drive roller 4.T, on which the bobbin 7 rests and is driven during the winding of the yarn 2. The drive roller 4.T can be driven by a motor, so that the rotational drive 4 is formed by the drive roller 4.T and the motor. Alternatively, the bobbin 6 can be clamped by a winding mandrel that is at least partially disposed within the bobbin and driven by the motor of the winding mandrel.

[0039] The winding machine 1 has at least one transverse force generating device 8, by means of which a transverse force acting on the package surface 9, in particular on the yarn end 10, at least partially in the longitudinal direction of the creel axis LSp can be generated.

[0040] The transverse force acting on the package surface 9 can be generated either in the direction of the first clamping disc 3.1 or in the direction of the second clamping disc 3.2. However, it is also conceivable that the transverse force generating device 8 has two regions, one of which can generate a transverse force in the direction of the first clamping disc 3.1, while the other can generate a transverse force in the direction of the second clamping disc 3.2. The yarn end 10 can be generated by cutting the yarn 2 traveling toward the winding machine 1 when the target diameter of the package 7 is reached. The yarn end 10 is a region of the yarn 2 that rests loosely on the package surface 9 and / or hangs down from it and is not held on the package 7 by adjacent yarn regions or yarn layers.

[0041] From Figure 1 and Figure 2 A first exemplary embodiment of the winding machine 1 is similar to that from Figure 3 and Figure 4 The second exemplary embodiment of the winding machine 1 differs only in the design of the transverse force generating device 8 .

[0042] The transverse force generating device 8 has at least one rotatably mounted roller 11.1 which can be pressed against the package surface 9. For this purpose, the roller 11.1 and the creel 3 can be moved relative to each other. Figure 1 and Figure 2 , the transverse force generating device 8 has precisely one such roller 11 . 1 .

[0043] The rotation axis LR1 of the roller 11.1 forms an angle α with respect to the plane formed by the creel axis LSp and the center MR1 of the rotation axis LR1 of the roller 11.1. This angle α is formed in particular when the roller 11.1 is in contact with the bobbin 7. The mechanism for the relative mutual movement of the roller 11.1 and the creel 3 is designed accordingly. Figure 2 In FIG, the plane is symbolically represented by the creel axis LSp and a straight line passing through the center MR1 and parallel to the creel axis LSp.

[0044] The value of the angle α is between 0° and 20°, preferably between 3° and 10°. The angle is particularly preferably approximately 5°. Due to such an angle α, on the one hand, it is achieved that the roller 11.1 is driven by the rotating bobbin 7 when the roller 11.1 is in contact with the bobbin 7. On the other hand, due to the inclined position of the roller 11.1 relative to the bobbin surface 9 and due to the rotation of the roller 11.1, a transverse force is also generated when the roller 11.1 is in contact with the bobbin 7. Figure 1 In this case, the package 7 rotates to the right, so that the roller 11.1 rotates to the left, which also generates a transverse force in the direction of the second clamping disc 3.2.

[0045] The transverse force generating device 8 is movably coupled to the frame 13 of the winding machine 1 by means of a spring / damper unit 12. The roller 11.1 is rotatably mounted on the protruding end of a protruding arm 12.K, wherein the protruding arm 12.K is rotatably mounted on the frame 13 at the end opposite the roller 11.1 about a rotation axis extending parallel to the creel axis LSp. On the one hand, the spring / damper unit 12 is connected to the protruding arm 12.K between the rotation axis of the protruding arm 12.K and the roller 11.1 and is likewise rotatable about a rotation axis extending parallel to the creel axis LSp. On the other hand, the spring / damper unit 12 is connected to the frame 13 at a distance from the rotation axis of the protruding arm 12.K and is likewise rotatable about a rotation axis extending parallel to the creel axis LSp. When contact is established between the roller 11.1 and the package surface 9, the roller 11.1 is then moved towards the frame 13, counteracting the force generated by the spring / damper unit 12, whereby the protruding arm 12.K is pivoted. In this way, a specific force can be generated between the roller 11.1 and the package surface 9 by means of the spring / damper unit 12.

[0046] according to Figure 1 and Figure 2 , the contact surface 14.1 of the roller 11.1 is spherical. The contact surface 14.1 of the roller 11.1 is the area of ​​the roller 11.1 designed to come into contact with the package surface 9. Conversely, the contact surface 14.1 of the roller 11.1 can also be cylindrical.

[0047] according to Figure 3 and Figure 4 In the second embodiment of the winding machine 1, the transverse force generating device 8 has two rotatably mounted rollers, specifically a first roller 11.1 and a second roller 11.2, each of which can be pressed onto the bobbin surface 9. The names of the first roller 11.1 and the second roller 11.2 are chosen by way of example in order to be able to distinguish these rollers, and therefore these names should not be considered restrictive. The first roller 11.1 and the second roller 11.2 can also be replaced with each other. In addition, Figure 1 and Figure 2 The Roller 11.1 can also have Figure 3 and Figure 4 Theoretically, it is also conceivable to use more than two rollers.

[0048] according to Figure 3 and Figure 4 The two contact surfaces 14.1, 14.2 of the rollers 11.1, 11.2 are each embodied as cylindrical. Alternatively, only one of the two rollers may have a cylindrical contact surface, while the other roller may have a different, for example spherical, contact surface.

[0049] The two rollers 11.1 and 11.2 are each rotatably mounted on a common bracket 15. The bracket 15 is mounted on the machine frame 13 so as to be rotatable about a bracket axis LTr, which is arranged generally parallel to the creel axis LSp. The bracket 15 is connected to the machine frame 13 by means of a protruding arm 12.K and a spring / damper unit 12. The bracket 15 is mounted on one protruding end of the protruding arm 12.K so as to be rotatable about the bracket axis LTr. The protruding arm 12.K is rotatably mounted on the machine frame 13 at its end opposite the bracket 15 about a rotation axis extending parallel to the creel axis LSp. On the other hand, the spring / damper unit 12 is connected to the protruding arm 12.K between the rotation axis of the protruding arm 12.K and the bracket 15 so as to be rotatable about a rotation axis extending parallel to the creel axis LSp. On the other hand, the spring / damper unit 12 is connected to the frame 13 at a distance from the rotation axis of the protruding arm 12.K and is likewise rotatable about a rotation axis extending parallel to the creel axis LSp.

[0050] The rotation axis LR1 of one of the two rollers 11.1 has an angle α with respect to a plane formed by the creel axis LSp and the center MR1 of the rotation axis LR1 of the one roller 11.1, the value of which is between 0° and 20°, preferably between 3° and 10°, particularly preferably approximately 5°. The rotation axis LR2 of the other of the two rollers 11.2 has an angle β with respect to a plane formed by the creel axis LSp and the center MR2 of the rotation axis LR2 of the other roller 11.2, the value of which is between 0° and -20°, preferably between -3° and -10°, particularly preferably approximately -5°.

[0051] The angles α, β are formed in particular when the rollers 11.1, 11.2 and the bobbin 7 are in contact. The mechanism for the relative movement of the rollers 11.1, 11.2 and the bobbin 7 is designed accordingly. Figure 4 In the diagram, the plane is symbolically represented by the creel axis LSp and a straight line passing through the respective center MR1, MR2 and parallel to the creel axis LSp. With respect to a straight line extending perpendicularly from the respective center MR1, MR2 toward the creel axis LSp, the angle α of the rotation axis LR1 of the first roller 11.1 is achieved by rotating counterclockwise from a straight line extending parallel to the creel axis LSp, while the angle β of the rotation axis LR2 of the second roller 11.2 is achieved by rotating clockwise from a straight line extending parallel to the creel axis LSp. This contrast between clockwise and counterclockwise rotation is illustrated by the different algebraic signs of the angles α and β. In particular, the angles α and β of the two rotation axes LR1, LR2 relative to the respective plane have substantially the same value. However, it is also conceivable that the angles α and β of the two rotation axes LR1, LR2 relative to the respective plane have different values ​​within the aforementioned range. When the angles α and β have the same value, lateral forces of equal magnitude but opposite directions are generated, i.e., the second roller 11.2 generates a lateral force toward the first clamping disk 3.1, and the first roller 11.1 generates a lateral force toward the second clamping disk 3.2.

[0052] The rotation axis of one of the two rollers may also have an angle with respect to a plane formed by the creel axis and the center of the rotation axis of the one roller, the value of which is between 0° and 20°, preferably between 3° and 10°, while the rotation axis of the other roller may be arranged substantially parallel to the creel axis. By means of the roller whose rotation axis is arranged parallel to the creel axis, substantially no transverse forces acting on the bobbin surface can be generated.

[0053] like Figure 1 and Figure 3As shown, the winding machine 1 has a switching actuator 16. The switching actuator 16 can be used to position the creel 3 in a winding position PA, in which the yarn 2 can be wound onto the bobbin 6. The switching actuator 16 can be used to position the creel 3 in a switching position PW, in which the bobbin 6 can be fed to a downstream conveying device 17. The switching actuator 16 can be used to position the creel 3 in a yarn end securing position PF, in which the bobbin surface 9 can be pressed against the at least one roller 11.1, 11.2.

[0054] The switching position PW corresponds to the final yarn end fixing position PF. The creel 3 is pivoted to the switching position PW. During the final part of the pivoting process, contact with the rollers 11.1 and 11.2 occurs. Simultaneously, the bobbin is decelerated. Once the bobbin has fully decelerated, the clamping discs 3.1 and 3.2 open. The bobbin falls onto the downstream transport device 17. The damping in the spring / damping system 12 ensures that the bobbin falls onto the downstream transport device 17 primarily due to gravity, without any additional eccentric acceleration or tilting caused by the contact pressure of the rollers 11.1 and 11.2.

[0055] The creel 3 can be pivoted about its pivot axis LSw by means of a switching actuator 16. The pivot axis LSw is arranged substantially parallel to the creel axis LSp and therefore also parallel to the support axis LTr and the axis of rotation of the spring / damper unit 12. In the yarn end fixing position PF, the force generated between the bobbin 7 and the at least one roller 11.1, 11.2 is generated by means of the switching actuator 16, which then interacts accordingly with the spring / damper unit 12.

[0056] A method for winding a yarn 2 will now be described, which can be performed in particular using the aforementioned winding machine 1. In this method, a bobbin 6, on which the yarn 2 is wound to form a package 7, is rotated by means of a rotary drive 4. During this process, the bobbin 6 is rotatably held about a creel axis LSp by means of a creel stand 3. The yarn 2 to form the package 7 is reciprocated between two end positions in the direction of the creel axis LSp by means of a traversing device 5.

[0057] During winding, the yarn 2 is guided at a specific position by means of a fixed upper yarn guide 5.1 of the traversing device 5 and reciprocated between two end positions by means of a traversing reciprocating yarn guide 5.2, the distance between these end positions corresponding to the bobbin width. The traversing reciprocating yarn guide 5.2 is connected to a traversing reciprocating belt 5.3, which is driven by a traversing reciprocating motor 5.4, preferably embodied as a stepper motor. Once the desired bobbin diameter 7 is reached, the bobbin 7 is lifted from the drive roller 4.T by means of a switching actuator 16. The traversing reciprocating yarn guide 5.2 is then held in a specific position so that a thread bead 18 can be wound at a specific position in the longitudinal direction of the bobbin 7. The creel 3 is then moved further to the yarn end securing position PF, so that the bobbin surface 9 contacts the at least one roller 11.1, 11.2, particularly in the area of ​​the thread bead 18.

[0058] A transverse force is then generated, acting at least partially in the longitudinal direction of the creel axis LSp, to act on the package surface 9, in particular on the yarn end 10, so that the upper yarn layers of the package 7 are displaced relative to each other and thus mechanically interlocked. In particular, the upper yarn layers are displaced relative to each other in the region of the yarn winding bundle 18. With the aid of such a yarn winding bundle 18, it is easier to position the yarn end 10 during further processing.

[0059] The transverse forces acting on the bobbin surface 9 are generated during the deceleration of the bobbin 7. For this purpose, the creel 3 has a corresponding braking device, for example for at least one clamping disc 3.1, 3.2.

[0060] The yarn 2 for producing the yarn end 10 is not cut before a transverse force is generated on the package surface 9. First, the winding bundle 18 is wound and then the package is lifted from the drive roller 4.T by means of the switching actuator 16.

[0061] Once the upper yarn layers of the bobbin 7 have been successfully displaced relative to each other and their mechanical interlocking has been achieved, the bobbin stand 3 is pivoted into the switching position PW adjacent to the downstream conveyor 17. By opening the clamping discs 3.1 and 3.2, the bobbin 7, in particular the bobbin tube 6, is placed on the two guide rails of the downstream conveyor 17. The clamping discs 3.1 and 3.2 are opened by increasing their relative spacing, for example, using a pneumatic or hydraulic system. The bobbin 7 is temporarily stored in the downstream conveyor 17 until it can be removed therefrom, preferably automatically. It is conceivable that multiple bobbins 7 may be temporarily stored in the downstream conveyor 17.

[0062] The bobbin 7 is preferably completely decelerated. The clamping discs 3.1, 3.2 are then opened to place the bobbin 7 on the subsequent conveying device 7.

[0063] The described winding machine 1 for a yarn 2 and the method for winding a yarn 2 are used in particular in texturing machines.

[0064] Reference Signs List

[0065] 1 Winding machine

[0066] 2 yarn

[0067] 3 Creel

[0068] 3.1 First clamping plate

[0069] 3.2 Second clamping plate

[0070] 4 Rotation drive device

[0071] 4.T drive roller

[0072] 5 Traverse device

[0073] 5.1 Upper yarn guide

[0074] 5.2 Traverse reciprocating yarn guide

[0075] 5.3 Traverse reciprocating belt

[0076] 5.4 Traverse reciprocating motor

[0077] 6 Bobbin

[0078] 7 bobbin

[0079] 8 Lateral force generating device

[0080] 9. Bobbin surface

[0081] 10 Yarn ends

[0082] 11.1 First roller

[0083] 11.2 Second roller

[0084] 12 Spring / Damper Units

[0085] 12.K protruding arm

[0086] 13 racks

[0087] 14.1 Contact surface of the first roller

[0088] 14.2 Contact surface of the second roller

[0089] 15 bracket

[0090] 16 Switching actuator

[0091] 17 Subsequent conveying device

[0092] 18 yarn loop bundle

[0093] LSp creel axis

[0094] LSw Pivot axis of creel 3

[0095] LR1 Axis of rotation of the first roller 11.1

[0096] LR2 Rotation axis of the second roller 11.2

[0097] LTr bracket axis

[0098] MR1 Center of the rotation axis LR1 of the first roller 11.1

[0099] MR2 Center of the rotation axis LR2 of the second roller 11.2

[0100] PA winding position

[0101] PF yarn end fixing position

[0102] PW Switch Position

[0103] α angle

[0104] β angle

Claims

1. A winding machine (1) for yarn (2), comprising a creel (3), a rotary drive (4) and a traversing device (5), wherein: The bobbin (6) can be held by means of the bobbin stand (3) so as to be rotatable about the bobbin stand axis (LSp), wherein, in order to wind the yarn (2) onto the bobbin (6) to form a bobbin (7), the bobbin (6) can be rotated by means of the rotary drive device (4), wherein the yarn (2) for forming the bobbin (7) can be moved back and forth between two terminal positions in the direction of the bobbin stand axis (LSp) by means of the traversing device (5), characterized in that the winding machine (1) has at least one transverse force generating device (8), by means of which a transverse force acting on the bobbin surface (9), in particular on the yarn end (10), can be generated at least partially in the longitudinal direction of the bobbin stand axis (LSp).

2. The winding machine (1) according to claim 1, characterized in that The transverse force generating device (8) has at least one rotatably mounted roller (11.1) which can be pressed onto the package surface (9).

3. The winding machine (1) according to claim 2, characterized in that The rotation axis (LR1) of the roller (11.1) makes an angle (α) with respect to a plane formed by the creel axis (LSp) and the center (MR1) of the rotation axis (LR1) of the roller (11.1).

4. The winding machine (1) according to claim 3, characterized in that The value of said angle (α) is between 0° and 20°, preferably between 3° and 10°.

5. Winding machine (1) according to any one of the preceding claims, characterized in that The transverse force generating device (8) is movably coupled to a machine frame (13) of the winding machine (1) by means of a spring / damper unit (12).

6. The winding machine (1) according to any one of claims 2 to 5, characterized in that The contact surface (14.1) of the roller (11.1) is spherical.

7. The winding machine (1) according to any one of claims 2 to 5, characterized in that The contact surfaces (14.1, 14.2) of the rollers (11.1, 11.2) are cylindrical.

8. Winding machine (1) according to any one of the preceding claims, characterized in that The transverse force generating device (8) has two rotatably mounted rollers (11.1, 11.2), each of which can be pressed onto the package surface (9).

9. The winding machine (1) according to claim 8, characterized in that The two rollers (11.1, 11.2) are each rotatably mounted on a common support (15), wherein the support (15) is mounted on the machine frame (13) so as to be rotatable about a support axis (LTr) which is arranged substantially parallel to the creel axis (LSp).

10. The winding machine (1) according to claim 8 or 9, characterized in that The rotation axis (LR1) of one roller (11.1) and / or two rollers (11.1) has an angle (α) with respect to a plane formed by the creel axis (LSp) and the center (MR1) of the rotation axis (LR1) of the one roller (11.1), the value of which is between 0° and 20°, preferably between 3° and 10°, wherein the rotation axis (LR2) of the other roller of the two rollers (11.2) has an angle (β) with respect to a plane formed by the creel axis (LSp) and the center (MR2) of the rotation axis (LR2) of the other roller, the value of which is between 0° and -20°, preferably between -3° and -10°.

11. The winding machine (1) according to claim 8 or 9, characterized in that The rotation axis (LR1) of one of the two rollers (11.1) has an angle with respect to a plane formed by the creel axis (LSp) and the center (MR1) of the rotation axis (LR1) of the one roller (11.1), the value of which is between 0° and 20°, preferably between 3° and 10°, wherein the rotation axis (LR2) of the other of the two rollers (11.2) is arranged essentially parallel to the creel axis (LSp).

12. Winding machine (1) according to any one of claims 2 to 11, characterized in that The winding machine (1) has a switching actuator (16), wherein the creel (3) can be positioned in a winding position (PA) by means of the switching actuator (16), in which the yarn (2) can be wound onto the bobbin (6), wherein the creel (3) can be positioned in a switching position (PW) by means of the switching actuator (16), in which the bobbin (6) can be supplied to a subsequent conveying device (17), wherein the creel (3) can be positioned in a yarn end fixing position (PF) by means of the switching actuator (16), wherein in the yarn end fixing position (PF) of the creel (3), the bobbin surface (9) can be pressed against the at least one roller (11.1, 11.2).

13. A method for winding a yarn (2), in particular by means of a winding machine (1) according to any one of the preceding claims, wherein: In order to wind the yarn (2) onto a bobbin (6) to form a package (7), the bobbin (6) can be rotated by means of a rotary drive (4), wherein in the process the bobbin (6) is held by means of a creel (3) so as to be rotatable about a creel axis (LSp), wherein the yarn (2) for forming the package (7) is moved back and forth between two end positions in the direction of the creel axis (LSp) by means of a traversing device (5), characterized in that a transverse force acting on the package surface (9), in particular on the yarn end (10), is generated at least partially in the longitudinal direction of the creel axis (LSp), so that a mutual displacement of the upper yarn layers of the package (7) occurs and thus a mechanical interlocking of these yarns occurs.

14. The method according to claim 13, characterized in that The transverse force acting on the bobbin surface (9) is generated when the bobbin (7) is decelerated.

15. The method according to claim 13 or 14, characterized in that Before the transverse force acting on the bobbin surface (9) is generated, the yarn (2) for producing the yarn end (10) is cut.

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