DEVICE FOR WEIGHING A FEED BOBBIN IN A WINDING MACHINE

Abstract

A device for rewinding yarns from a feed bobbin onto a bobbin tube includes a controller, a machine frame, and a bobbin mandrel held in a rotationally fixed manner in the machine frame to receive the feed bobbin. A winding device includes a thread brake to set a yarn tension in the yarn rewound from the feed bobbin onto the bobbin tube. A holder for the bobbin mandrel includes a weighing system in communication with the controller, wherein an adjustment of the thread brake is provided by the controller based on a weighing of the feed bobbin.

Claims

1-12. (canceled)

13. A device for rewinding yarns from a feed bobbin onto a bobbin tube to form a bobbin, comprising: a controller; a machine frame; a bobbin mandrel held in a rotationally fixed manner in the machine frame to receive the feed bobbin; a winding device that comprises a thread brake to set a yarn tension in the yarn rewound from the feed bobbin onto the bobbin tube; and a holder for the bobbin mandrel, the holder comprising a weighing system in communication with the controller, wherein an adjustment of the thread brake is provided by the controller based on a weighing of the feed bobbin.

14. The device according to claim 13, wherein the weighing system comprises a force measurement device arranged between the bobbin mandrel and the machine frame.

15. The device according to claim 14, further comprising a damping element provided between the force measurement device and the bobbin mandrel.

16. The device according to claim 12, wherein the is provided in a feed table fastened in the machine frame, wherein the feed table is height-adjustable.

17. The device according to claim 16, wherein the height adjustment of the feed table is continuous.

18. The device according to claim 12, further comprising an input device is communication with the controller to enter specifications of the feed bobbin and winding parameters into the controller.

19. The device according to claim 12, wherein the controller initiates a visual or acoustic signal when a target weight of the feed bobbin is undershot.

20. A method for rewinding a yarn from a feed bobbin (17) onto a bobbin tube using a device having: a controller; a machine frame; a bobbin mandrel held in a rotationally fixed manner in the machine frame to receive the feed bobbin; a winding device that comprises a thread brake to set a yarn tension in the yarn rewound from the feed bobbin onto the bobbin tube; a holder for the bobbin mandrel, the holder comprising a weighing system in communication with the controller; the method comprising: calculating an actual weight of the feed bobbin with the controller based on a weighing from the weighing system, and adjusting a setting of the thread brake based on the actual weight.

21. The method according to claim 20, wherein the actual weight is calculated when the winding device is at a standstill for calibration of the method.

22. The method according to claim 21, wherein the controller prevents the winding device from restarting when a target weight of the feed bobbin is undershot.

23. The method according to claim 20, wherein the controller assigns a corresponding draw-off tension to a respective weight of the feed bobbin based on the specification of the feed bobbin input and winding parameters input into the controller.

24. A winding machine comprising the device according to claim 12.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Further advantages of the invention are described in the following embodiment. In the drawings:

[0021] FIG. 1 shows a schematic representation of a winding machine according to the prior art;

[0022] FIG. 2 shows a schematic view of a first embodiment of a device according to the invention;

[0023] FIG. 3 shows a schematic view of a second embodiment of a device according to the invention, and

[0024] FIG. 4 shows a schematic view of a third embodiment of a device according to the invention.

DETAILED DESCRIPTION

[0025] Reference will now be made to embodiments of the invention, one or more examples of which are shown in the drawings. Each embodiment is provided by way of explanation of the invention, and not as a limitation of the invention. For example features illustrated or described as part of one embodiment can be combined with another embodiment to yield still another embodiment. It is intended that the present invention include these and other modifications and variations to the embodiments described herein.

[0026] FIG. 1 shows a schematic view of a winding machine according to the prior art. A winding station is shown, which serves for rewinding yarn 3 from a feed bobbin 17 onto a bobbin 2. A winding machine can comprise a plurality of such winding stations. A machine frame 26 is set up on a foundation 25. A winding device 1 for winding yarn 3 and forming a bobbin 2 is held in the machine frame 26. The yarn 3 is removed from a feed bobbin 17 and fed to the winding device 1 in a yarn running direction 4. The winding device 1 comprises a bobbin axis 8 in which a bobbin tube 2 is rotatably mounted. The bobbin tube 2 is set in rotation by a drive (not shown) in a direction of rotation 6, whereby the yarn 3 is wound onto the bobbin tube 5 and the bobbin 2 is formed. The bobbin axis is held in a pivot arm 7. The pivot arm 7 is rotatably held in a pivot axis 9 in the machine frame 26 via a support 11 so that the pivot arm 7 can perform a pivoting movement 10 about the pivot axis 9. During a winding process, the bobbin 2, or at the beginning of bobbin formation the bobbin tube, rests on a support roller 12. The support roller 12 in a support 14 is also rotatably held in the machine frame 26. The support roller 12 is set in rotation by the bobbin 2, which rotates in the direction of rotation 6 and rests on the support roller 12, in a direction of rotation 13. During a winding process, a diameter of the bobbin 2 increases steadily and, via the pivot arm 7, a distance between the bobbin axis 8 and the support roller 12 is compensated accordingly by the pivoting movement 10.

[0027] The yarn 3 coming off the feed bobbin 17 is guided after the feed bobbin 17 (when viewed in the yarn running direction) via the thread brake 16 and then through a cross-winding device 15 before it reaches the support roller 12 and is wound onto the bobbin tube 5. The cross-winding device serves to move the yarn 3 back and forth parallel to a surface of the bobbin 2 in the direction of the bobbin axis 8 in order to achieve uniform winding or a predetermined winding characteristic. The feed bobbin 17 is held on a bobbin mandrel 18, wherein the bobbin mandrel 18 is fastened in the machine frame 26 via a holder 19. The bobbin mandrel 18 can be fastened rotatably or in a rotationally fixed manner in the holder 19. Depending on the type of fastening, the feed bobbin 17 is held movably on the bobbin mandrel 18 or the bobbin mandrel 18 is held movably in the holder 19.

[0028] FIG. 2 shows a schematic view of a first embodiment of a device according to the invention. The illustration shows a lower portion of the machine frame 26 with a holder 19 for the bobbin mandrel 18 mounted thereon. For better understanding, a feed bobbin 17 placed on the bobbin mandrel 18 and a yarn 3 to be unwound therefrom are indicated by dashed lines. The holder 19 comprises a bobbin mandrel base 20 and a force measurement device 23. The bobbin mandrel 18 is held in the bobbin mandrel base 20. By way of example, a lock 21 is shown which results in a rotationally fixed connection of the bobbin mandrel 18 to the bobbin mandrel base 21. However, the bobbin mandrel 18 and bobbin mandrel base 21 can also be provided in one piece. A two-part design has the advantage that the bobbin mandrel 18 can easily be replaced as required on the basis of a geometry of the feed bobbin 17 or of wear. The bobbin mandrel base 20 is held with a fastening 22 on a force measurement device 23, which in turn is held on the machine frame 26 by means of a fastening 24. In the embodiment shown by way of example, the fastening 24 of the force measurement device 23 is simultaneously the fastening of the holder 19. However, the force measurement device can also be arranged within the holder 19 or the bobbin mandrel base 20, as a result of which the fastening n24 would directly represent a connection of the holder 19 or the bobbin mandrel base 20. The fastenings 22 and 24 can be designed, for example, as threaded connections or quick-release fasteners.

[0029] The measurement data of the force measurement device are forwarded to a controller 27 and evaluated therein. The controller 27 is also connected to the winding device 1 in order to send the necessary signals to the drives of the winding device 1. This is necessary, for example, if further operation of the winding device 1 is to be prevented because there is too little yarn on the feed bobbin 17 for a bobbin to be formed. Furthermore, an input device 29 is connected to the controller 27. By means of the input device 29, the operating personnel can input data required for the operation of the winding.

[0030] FIG. 3 shows a schematic view of a second embodiment of a device according to the invention. Peripheral device parts that are identical to the first embodiment are not shown. A holder 19 for a bobbin mandrel 18 arranged therein is provided on the machine frame 26, which stands on the foundation 25. The holder 19 comprises a bobbin mandrel base 20 and a force measurement device 23. The bobbin mandrel base 20 and the force measurement device 23 are connected to one another by means of a fastening 22. The holder 19 is connected to the machine frame 26 by means of a fastening 24. In order to avoid a transfer of oscillations or vibrations from the bobbin mandrel 18 to the force measurement device 23, a damping element 28 is provided by way of example between the bobbin mandrel 18 and the bobbin mandrel base 20. The same effect can also be achieved if a damping element 28 were to be installed between the bobbin mandrel base 20 and the force measurement device 23.

[0031] FIG. 4 shows a schematic view of a third embodiment of a device according to the invention. A plurality of mounting pins 31 is fastened to the machine frame 26. The mounting pins are arranged one above the other in different fastening planes 32. A feed table 30 is hung on the retaining pins 31 of a fastening plane 32. The feed table has a height corresponding to the selected fastening plane 32 above the foundation 25 on which the machine frame 26 stands. The holder 19 for the bobbin mandrel 18 is fastened to the feed table. In this case, the holder 19 is arranged in such a way that the force measurement device 23 comes to lie below the feed table 30, that is to say on the side of the feed table 30 facing away from a feed bobbin 17 placed on the bobbin mandrel 18. As a result, dirt or dust arising when the yarn 3 is drawn off in the yarn-running direction 4 can be kept away from the force measurement device 23. In this embodiment, the holder 19 also consists of the force measurement device 23 and the bobbin mandrel base 20. The holder 19 is connected to the machine frame 26 via the feed table by means of corresponding fastenings 24. In the present embodiment, the height of the feed table 30 and thus a distance of the bobbin mandrel 18 from the winding device lying above it (not shown) can be changed by changing the feed table 30 into another fastening plane 32. An arrangement of the feed table in a second position 33 is shown in a dashed image.

[0032] The present invention is not limited to the embodiments as shown and described. Modifications within the scope of the claims are possible, as well as a combination of the features, even if these are shown and described in different embodiments.

LIST OF REFERENCE SIGNS

[0033] 1 Winding device [0034] 2 Bobbin [0035] 3 Yarn [0036] 4 Yarn running direction [0037] 5 Bobbin tube [0038] 6 Direction of rotation of the bobbin [0039] 7 Pivot arm [0040] 8 Bobbin axis [0041] 9 Pivot axis [0042] 10 Pivoting movement [0043] 11 Support [0044] 12 Support roller [0045] 13 Direction of rotation of the support roller [0046] 14 Support [0047] 15 Cross-winding device [0048] 16 Thread brake [0049] 17 Feed bobbin [0050] 18 Bobbin mandrel [0051] 19 Holder [0052] 20 Bobbin mandrel base [0053] 21 Lock [0054] 22 Bobbin mandrel base fastening [0055] 23 Force measurement device [0056] 24 Holder fastening [0057] 25 Foundation [0058] 26 Machine frame [0059] 27 Controller [0060] 28 Damping element [0061] 29 Input device [0062] 30 Feed table [0063] 31 Mounting pin [0064] 32 Fastening plane [0065] 33 Second position of the feed table