Winding bobbin

Abstract

The invention relates to a winding bobbin (1) comprising a filament bundle (FB) and comprising a winding core (2) onto which the filament bundle (FB) has been wound, wherein: the winding core (2) has a first core end portion (20) and a second core end portion (21); a wall thread catcher (22) for catching the filament bundle (FB) is formed in the core wall (23); and the winding bobbin (1) on one end face has an overhang face (12) which covers at least one of the core end portions at least partly at a distance therefrom, so that access to the filament bundle caught in the wall thread catcher is possible, and relates to the associated apparatus and to the associated method for forming the winding bobbin (1).

Description

[0001] winding spool

[0002] The invention relates to a winding spool with a filament bundle and with a winding sleeve on which the filament bundle is wound, and to an associated method and an associated device for forming the winding spool.

[0003] The formation of winding coils is known from the general state of the art.

[0004] Winding spools often have a section designed to catch a strand / filament bundle on the winding core. Catching the filament bundle is necessary, for example, when starting, changing, and / or removing the filament.

[0005] The section for catching the filament bundle must not be wound over to allow for further processing. For example, the thread or filament bundle of the next spool can be tied to this point. Therefore, the section for catching the filament bundle on the winding spool cannot be used for the winding spool itself.

[0006] The object of the invention is therefore to provide a winding coil according to the invention, with which a better utilization of the winding sleeve is possible.

[0007] It is also an object of the invention to provide a method by which the winding coil according to the invention can be formed.

[0008] It is also an object of the invention to provide a device with which the winding coil according to the invention can be formed.

[0009] This problem with regard to the winding coil is solved according to the invention with a winding coil having the features according to claim 1.

[0010] According to one aspect of the invention, a winding spool with a filament bundle and with a winding sleeve on which the filament bundle is wound is provided, wherein the winding sleeve has a first sleeve end section and a second sleeve end section, wherein a wall thread catcher for catching the filament bundle is formed in the sleeve wall, wherein the winding spool has an overhanging side at one end face which covers at least one of the sleeve end sections at least sectionally spaced apart, so that access to the filament bundle caught in the wall thread catcher is possible.

[0011] An overhang side of the winding coil is understood to be a side of the winding coil which, in order to utilize free space, does not extend at approximately 90° from the winding sleeve on which the winding coil is formed, but extends at a predetermined angle of less than 90° towards a sleeve end section.

[0012] A filament bundle is a synthetic thread made up of a variety of filaments. A filament bundle can also be a thread made of natural fibers, such as wool and / or cotton.

[0013] Yarn spools typically have a cylindrical or biconical shape. The aim is to protect a spool geometry in which an increasing stroke width creates an overhang that allows the space above the wall thread catcher, also called the catch slot, to be utilized.

[0014] If the winding spool is designed with an overhanging side, the free space to be wound on the winding spool can be used more effectively.

[0015] Space utilization in the production of yarn spools is increased, which allows for the construction of more compact machines or machines with a larger number of spools.

[0016] The utilization of the winding tube is improved, which means that shorter winding tubes can be used in relation to the yarn mass.

[0017] This also helps protect the environment, as a larger quantity of filament bundles can be wound onto the winding spool. Furthermore, energy can be saved with a winding spool featuring an overhang. In winding devices that wind multiple spools side by side, the smaller gaps between the spools reduce turbulence, resulting in lower energy consumption and less vibration.

[0018] According to a preferred embodiment of the winding spool, a filament reserve can be caught in the wall filament catcher, wherein the filament reserve in the wall filament catcher is freely accessible, and wherein the filament bundle is wound onto the winding sleeve outside the area of ​​the wall filament catcher to form the winding spool.

[0019] A thread reserve refers to the first layer of thread or filament bundle that is wound onto the spool. The thread reserve is important for further processing of the thread or filament bundle wound onto the spool, as the spool is connected to another spool, for example, to prevent interruptions in further processing.

[0020] According to a further preferred embodiment of the winding spool, the wall thread catcher is designed as a thread notch with a predetermined depth in the sleeve wall of the winding sleeve and has an entry section for catching the filament bundle and a clamping section for clamping the filament bundle to the winding sleeve.

[0021] The wall thread catcher is formed in the spool wall of the winding sleeve and serves to automatically catch the thread with the winding sleeve.

[0022] In a particularly preferred embodiment of the winding spool, the filament catcher is designed as a continuous filament window in the spool wall, such that the filament window penetrates the spool wall at least partially and has an entry section for capturing the filament bundle and a clamping section for clamping the filament bundle to the winding spool. The filament catcher can also have a filament window that completely penetrates the spool wall. With a filament window, the automatic capture and clamping of the filament can be improved and ensured, as the filament is introduced into the winding spool.

[0023] According to a particularly preferred embodiment of the winding spool, the winding spool is wound on the overhang side with a changing stroke width, wherein the stroke width is spaced apart from the wall filament catcher by a predetermined overhang width and a predetermined overhang height, so that the area above the predetermined transition height is occupied by the filament bundle.

[0024] The overhang does not need to extend across the entire end face of the winding spool. Depending on the chosen overhang angle, the overhang may reach the available clearance, requiring a change in the overhang angle. The winding spool then continues with an end section that defines a different angle with the winding sleeve than the overhang section. Essentially, the overhang section utilizes the available clearance.

[0025] According to a further preferred embodiment of the winding spool, the overhang side has an overhang section with the predetermined transition width, which spans the wall thread catcher at a predetermined angle.

[0026] The overhang section essentially utilizes the available free space at the first and / or second sleeve end section.

[0027] The overhang section is formed with a predetermined angle and extends over the winding sleeve with a predetermined transition width.

[0028] According to a particularly preferred embodiment of the winding spool, the overhang section defines a transition width in the range of essentially 10 to 30 mm and an overhang angle in the range of essentially 5 to 80°. Depending on the thread or filament bundle to be wound and the winding method used (random winding, step precision winding), the appropriate and feasible overhang angle can vary.

[0029] According to another aspect of the invention, a method for forming a winding coil of at least one of the preceding embodiments is provided, comprising the steps:

[0030] Catching a bundle of threads at the end section of a winding sleeve using a wall thread catcher,

[0031] Winding a thread reserve from a first layer of thread bundles in the area of ​​the wall thread catcher on the winding sleeve,

[0032] Winding the winding spool, leaving the area of ​​the wall thread catcher free, with the stroke width increasing as the winding spool changes over the winding journey, so that an overhang side with an overhang width and an overhang angle is formed on the winding spool at a spool end section with or without a wall thread catcher.

[0033] According to a further preferred embodiment of the method, the winding coil is formed with a random winding and / or a step precision winding.

[0034] According to a further aspect of the invention, a device for forming a winding coil according to at least one of the preceding embodiments is provided, comprising a changing device for winding the winding coil with a control for changing the stroke width over the coil travel according to at least one method according to at least one of the preceding embodiments.

[0035] The control of the changing device is set up to form the winding coil with an overhang side that has an overhang width and an overhang angle at a coil sleeve end section.

[0036] The device according to the invention is explained in more detail below with reference to some exemplary embodiments of the device according to the invention and the accompanying figures. These figures represent:

[0037] Fig. 1 schematically shows a cross-sectional view of a cylindrical winding spool wound on a winding sleeve with a wall thread catcher.

[0038] Fig. 2 schematically shows a cross-sectional view of a winding spool according to the invention with an overhanging side that at least partially covers the wall thread catcher,

[0039] Fig. 3 schematically shows a cross-sectional view of a second embodiment of the winding spool according to the invention with an overhang section that at least partially covers the wall thread catcher,

[0040] Fig. 4 schematically shows a cross-sectional view of a third embodiment of winding coils according to the invention arranged in series.

[0041] Fig. 5 schematically shows a cross-sectional view of a fourth embodiment of winding coils arranged in series according to the invention.

[0042] Fig. 6 schematically shows a partial sectional view of the winding sleeve,

[0043] Fig. 7 schematically shows a sectional view of the winding sleeve, with a bundle of threads being placed in a wall thread catcher, and

[0044] Fig. 8 shows a schematic view of a changing device for forming the winding coil.

[0045] Fig. 1 schematically shows a cross-sectional view of a cylindrically shaped winding coil 1 wound onto a winding sleeve 2. The winding coil 1 has a first end face 10 and a second end face 11, which are wound substantially parallel to each other. The free space FR between the first end face 10 and the second end face 11 and the adjacent first sleeve end section 20 and second sleeve end section 21 of the winding sleeve 2 is not used.

[0046] In the sleeve wall 23 of the winding sleeve 2, a wall thread catcher 22 is formed at the first sleeve end section 20.

[0047] Figure 2 shows an embodiment of the winding spool 1, in which the free space FR on the side of the first spool end section 20 is indicated, and how the free space FR can be used. Figures 3, 4 and 5 show further embodiments of how the free space FR can be utilized and used with a filament bundle FB or thread.

[0048] Fig. 6 schematically shows a partial sectional view of the winding sleeve 2 with a detailed view of the wall thread catcher 22.

[0049] Fig. 7 shows in a cross-sectional view the sleeve end section 20 with a filament bundle FB inserted into the wall thread catcher 22 to catch the filament bundle FB, so that the filament bundle FB can be wound onto the winding sleeve 2.

[0050] The wall thread catcher 22 can be designed as a thread window 22 that completely penetrates the sleeve wall 23, as shown for example in Fig. 7, or as a thread notch 25 that does not completely penetrate the sleeve wall (not shown).

[0051] The wall thread catcher 22 has, in both the embodiment with thread window 24 and the embodiment with thread notch 24, an entry section 26 for catching the thread or filament bundle FB and a clamping section 27 for clamping and holding the thread or filament bundle FB on the winding sleeve 2.

[0052] The entry section 26 is wider at the beginning to better catch the thread FB and tapers towards the clamping section 27 in such a way that the thread FB can become wedged there and is also held there during a further rotation of the winding sleeve 2.

[0053] For turning and winding, the winding sleeve 2 is mounted on a shaft (not shown), such as a chuck, which ideally locks the winding sleeve 2 for winding and, when the winding sleeve 1 is completely covered with the yarn FB, can release it so that the winding sleeve 1 can be offloaded (pulled off the shaft). Offloading can be done manually by an operator and / or automatically with an offloading device that can at least receive and transport the full winding spools. The yarn FB caught in the wall yarn catcher 22 forms a yarn reserve 4, as shown in Fig. 8. The yarn reserve 4 must be freely accessible so that further processing of the winding spool is possible. For example, the winding spools 1 are knotted together via the yarn reserve 4.

[0054] Therefore, the area around the free space Fr of the wall thread catcher 22 cannot be used for winding the filament bundle FB.

[0055] Figures 2 to 5 show exemplary embodiments of the winding coil 1, showing how the unused free space FR on the winding sleeve 2 can be used.

[0056] Fig. 2 shows a cross-sectional view of a winding spool 1 according to the invention with an overhang side 12 that at least partially covers the wall thread catcher 22. In the embodiment shown in Fig. 2, the overhang side 12 has an overhang section 16 that is inclined at a predetermined angle α towards the wall thread catcher 22 along the length of the overhang side 12, so that the space above the wall thread catcher 22 can be used more effectively for winding filament bundles FB.

[0057] Fig. 3 shows a further embodiment of the winding spool 1 according to the invention, wherein the overhang side 12 has an overhang section 16 formed with a predetermined angle α and an end section 17 extending substantially perpendicular to the surface of the winding spool 1. The overhang section 16 extends from the winding sleeve 2 at a smaller angle α compared to Fig. 2, so that the wall thread catcher 22 is covered more quickly by the filament bundle FB.

[0058] This is achieved by changing the stroke width HB, whereby the thread FB changes at least on one side, for example on the side of the first spool end section 20, from an initial stroke width HB1 to an increasing stroke width HBn over the spool travel, until the available free space FR above the first spool end section 20 and / or the second spool end section 21 is utilized. Depending on the angle α of the overhang section 16, it may be necessary to keep the stroke width HB constant if the maximum limits of the available free space FR are utilized. Then, after n stroke change steps of the spool travel, the stroke width HBn is kept essentially constant, so that the winding spool 1 has an end section 17 adjacent to the overhang section 16, which is angled at less than 90°, and is formed at an angle of essentially 90° to the winding spool 2.

[0059] When the horizontal clearance FR is fully utilized, the winding process continues with the straight, 90° angled end section 17, so that adjacent winding coils 1 are not disturbed or obstructed. The stroke width HB is stored in a control unit 38.

[0060] Figs. 4 and 5 show further embodiments of the winding spool 1 with an overhang section 16 on each side of the first sleeve end section 20 and the second sleeve end section 21 (Fig. 4) or only on the side of the second sleeve end section 21 of the winding spool, which does not have a wall thread catcher.

[0061] Currently, winding devices are used that can wind a large number of winding spools 1 side by side and simultaneously. This is shown schematically in Figures 4 and 5, without depicting the winding device itself.

[0062] The number of coils wound side by side 1 can be up to twelve or more, with each coil position having its own changing device 3, which can adjust the stroke width HB via its control 38. The maximum number of coils 1 is determined by the number of changing devices 3 on the chuck of the winding device.

[0063] With the changing device 3, the overhang section 16 can be formed on one and / or both sides of the winding spool 1 (Fig.4) and / or on the side facing away from the wall thread catcher 22.

[0064] A double-sided overhang section 16 offers the advantage that the resulting overhang angle α or the transition height Hf would only need to be half as large. A configuration of the overhang section 16 on the other side at the second sleeve end section 21, see Fig. 5, has the advantage that any potential knock-offs, which could be promoted by the overhang section 16, would not impair the unwinding behavior of the winding spool 1.

[0065] Fig. 8 shows a changing device 3 which is programmable for forming the winding coil 1 and the associated overhang sections 16.

[0066] The changing device 3 has a movable contact roller 30, which presses the filament bundle FB or thread FB against the winding spool 3, and its own contact roller drive 34. The contact roller 30 is movable so that the distance to the winding sleeve 2 automatically increases with the length of the cross-wound winding 40. The rotational speed of the winding spool 1 can also be determined using the contact roller drive 34.

[0067] The filament bundle FB or thread FB is first caught at the winding sleeve 2 with wall thread catcher 2 and the thread reserve 4 is formed, whereby the thread FB is guided by a thread guide 32.

[0068] The thread guide 32 has a control unit 38 which controls and / or regulates a thread guide drive 36. Regulation is possible, for example, via the data obtained from the contact roller 30.

[0069] The control unit 38 can store and recall the respective stroke width HB1 to HBn, so that the optimal stroke width HB1 to HBn for each winding layer of the winding spool 1 is executed by the thread guide 32, whereby the predetermined overhang section 16 can be formed on the first end face 10 and / or on the second end face 11. The overhang section 16 is formed with a predetermined overhang angle a, a predetermined overhang width B, and a predetermined overhang height HF.

[0070] All three parameters a, B, and HF are adapted to the available free space FR. According to an exemplary embodiment of a method for forming the winding coil 1, which can be carried out with the changing device 3, at least the following steps are performed.

[0071] In a first step S1, the filament bundle FB is caught at a spool end section of a winding sleeve 2 with the wall thread catcher 22.

[0072] Then, in a second step S2, the thread reserve 4 is wound onto the winding sleeve 2 from a first layer of thread bundles FB in the area of ​​the wall thread catcher 22.

[0073] In a third step S3, the winding spool 1 is wound onto the spool, leaving the area of ​​the wall thread catcher 22 free.

[0074] After a fourth step S4, the stroke width HB1 - HBn increases as the winding spool 1 moves along the winding path, so that an overhang side 12 with an overhang width B and an overhang angle a is formed on the winding spool 1 at a spool end section 20, 21. The overhang side 12 can be formed on the side where the wall thread catcher 22 is located or on the opposite side.

[0075] The winding coil 1 can be formed using a random winding and / or a step precision winding.

[0076] Reference symbol list:

[0077] 1 winding spool

[0078] 10 first front

[0079] 11 second front

[0080] 12 Overhang side

[0081] 16 Overhang section

[0082] 17 Frontal section

[0083] 2 winding sleeve

[0084] 20 first sleeve end section

[0085] 21 second sleeve end section

[0086] 22 Wall thread catcher

[0087] 23 Sleeve wall

[0088] 24 thread windows

[0089] 25 thread notch

[0090] 26 Entry section

[0091] 27 Clamping section

[0092] 3 Changing device

[0093] 30 Contact roller

[0094] 32 thread guides

[0095] 34 Contact roller drive

[0096] 36 Thread guide drive

[0097] 38 Control

[0098] 4 thread reserve

[0099] 40 Cross-coil winding

[0100] 42 Chuck center axis

[0101] 6 Thread direction

[0102] 8 Winding direction

[0103] FB Filament bundle, thread

[0104] FR Free Space

[0105] HB stroke width

[0106] HB1 - HBn first to nth stroke width

[0107] B Overhang width

[0108] Hf overhang height

[0109] A overhang angle

Claims

Patent claims 1. Winding spool (1) with a filament bundle (FB) and with a winding sleeve (2) on which the filament bundle (FB) is wound, wherein the winding sleeve (2) has a first sleeve end section (20) and a second sleeve end section (21), wherein a wall thread catcher (22) for catching the filament bundle (FB) is formed in the sleeve wall (23), wherein the winding spool (1) has an overhang (12) at one end face which covers at least one of the sleeve end sections at least sectionally spaced apart, so that access to the filament bundle caught in the wall thread catcher is possible.

2. Winding spool (1) according to claim 1, characterized in that a filament reserve (4) can be caught in the wall filament catcher (22), wherein the filament reserve (4) is freely accessible in the wall filament catcher, wherein the filament bundle (FB) is wound onto the winding sleeve outside the area of ​​the wall filament catcher (22) to form the winding spool.

3. Winding spool (1) according to at least one of the preceding claims 1 or 2, characterized in that the wall thread catcher (22) is designed as a thread notch (25) with a predetermined depth in the sleeve wall (23) of the winding sleeve (2) and has an entry section (26) for catching the filament bundle (FB) and a clamping section (27) for clamping the filament bundle to the winding sleeve.

4. Winding spool (1) according to at least one of the preceding claims, characterized in that the wall thread catcher (22) is designed as a thread window (24) in the sleeve wall (23) of the winding sleeve (2) and is continuous, so that the thread window penetrates the sleeve wall at least section by section, and has an entry section for catching the filament bundle and a clamping section for clamping the filament bundle to the winding sleeve.

5. Winding coil (1) according to at least one of the preceding claims, characterized in that the winding coil is connected on the overhang side (12, 14) with a the filament is wound up with a changing stroke width, wherein the stroke width is spaced with a predetermined overhang width (B) and a predetermined overhang height (Hf) to the wall filament catcher, so that the area above the predetermined overhang height (Hf) is occupied by the filament bundle (FB).

6. Winding spool (1) according to at least one of the preceding claims, characterized in that the overhang side (12, 14) has an overhang section (16) with the predetermined transition width (B) which spans the wall thread catcher (22) at a predetermined angle (a).

7. Winding coil (1) according to at least one of the preceding claims, characterized in that the overhang section (16) defines a transition width in the range of substantially 10 to 30 mm and an overhang angle in the range of substantially 5 to 80°.

8. Method for forming a winding coil (1) according to at least one of the preceding claims 1 to 7, comprising the steps: - Catching (S 1 ) a bundle of threads (FB) at a spool end section of a winding sleeve (2) with a wall thread catcher (22), - Winding (S2) a thread reserve (4) from a first layer of thread bundles in the area of ​​the wall thread catcher on the winding sleeve, - Winding the winding spool into a winding spool (1), whereby the area of ​​the wall thread catcher is left free (S3), wherein - the stroke width increases when changing the winding spool (1) over the winding journey (S4), so that an overhang side (12, 14) with an overhang width (B) and an overhang angle (a) is formed on the winding spool at a spool end section with or without a wall thread catcher (22).

9. Method according to claim 1, characterized in that the winding coil (1) is formed with a random winding and / or a step precision winding.

10. Device for forming a winding coil (1) according to at least one of the preceding claims 1 to 7, comprising a changing device (3) for Winding the coil with a control (38) for changing the stroke width over the coil travel according to at least one method according to at least one of claims 8 or 9, wherein the control (38) of the changing device (3) for forming the coil (1) is configured with an overhang side (12) which has an overhang width (B) and an overhang angle (a) at a coil sleeve end section.

Images