Method for a textile machine, and a textile machine

Abstract

A textile machine and associated operational method are provided, wherein the textile machine has a plurality of workstations for (a) delivering a thread to a bobbin, (b) laying the thread on the bobbin, (c) winding the thread on the bobbin, and (d) finding a thread end wound on the bobbin with a suction nozzle. The thread is run through the suction nozzle during delivery to the bobbin such that the thread enters an inlet mouth in the suction nozzle and exits the suction nozzle through an extraction mouth. Starting from a thread delivery device at the workstation, the thread is run freely until the thread enters the inlet mouth of the suction nozzle directly in front of the bobbin. For finding of the thread end wound on the bobbin, the thread end is sucked into the suction nozzle through the extraction mouth.

Claims

1. A method for operating a spinning machine having a plurality of spinning units for (a) delivering a thread produced at the spinning units and drawn off by delivery rollers to a bobbin, (b) laying the thread on the bobbin, (c) winding the thread on the bobbin, and (d) finding a thread end wound on the bobbin by means of a suction nozzle, the method comprising: running the thread through the suction nozzle during the delivery of the thread to the bobbin such that the thread enters a first opening in the suction nozzle serving as an inlet mouth for the thread and exits the suction nozzle through a second opening serving as an extraction mouth for the thread; after the delivery rollers at the spinning unit, running the thread to the inlet mouth of the suction nozzle directly in front of the bobbin; and wherein for the finding of the thread end wound on the bobbin, the thread end is sucked into the suction nozzle through the extraction mouth.

2. The method according to claim 1, further comprising connecting the suction nozzle to an extraction system through the inlet mouth or a third opening in the nozzle serving as a connection mouth upon the sucking in of the thread end.

3. A method for operating a textile machine having a plurality of workstations for (a) delivering a thread to a bobbin, (b) laying the thread on the bobbin, (c) winding the thread on the bobbin, and (d) finding a thread end wound on the bobbin by means of a suction nozzle, the method comprising: running the thread through the suction nozzle during the delivery of the thread to the bobbin such that the thread enters a first opening in the suction nozzle serving as an inlet mouth for the thread and exits the suction nozzle through a second opening serving as an extraction mouth for the thread; starting from a thread delivery device at the workstation, running the thread to the inlet mouth of the suction nozzle directly in front of the bobbin; wherein for the finding of the thread end wound on the bobbin, the thread end is sucked into the suction nozzle through the extraction mouth; and further comprising connecting the suction nozzle to an extraction system through a third opening in the nozzle serving as a connection mouth and sealing the inlet mouth of the suction nozzle upon the sucking in of the thread end.

4. The method according to claim 1, further comprising connecting the inlet mouth to an extraction system through a connection element upon the sucking in of the thread end.

5. A method for operating a textile machine having a plurality of workstations for (a) delivering a thread to a bobbin, (b) laying the thread on the bobbin, (c) winding the thread on the bobbin, and (d) finding a thread end wound on the bobbin by means of a suction nozzle, the method comprising: running the thread through the suction nozzle during the delivery of the thread to the bobbin such that the thread enters a first opening in the suction nozzle serving as an inlet mouth for the thread and exits the suction nozzle through a second opening serving as an extraction mouth for the thread; starting from a thread delivery device at the workstation, running the thread to the inlet mouth of the suction nozzle directly in front of the bobbin; wherein for the finding of the thread end wound on the bobbin, the thread end is sucked into the suction nozzle through the extraction mouth; and further comprising moving the extraction mouth between different distance positions from the bobbin circumference in performance of different ones of functions (a) through (d).

6. The method according to claim 5, wherein movement of the extraction mouth between the different distance positions is coupled with movement of a thread lifter or a thread guide of a thread traversing device at the work station.

7. The method according to claim 6, wherein the extraction mouth is: (a) at a first position for running the thread through the suction nozzle during the delivery of the thread to the bobbin; (b) at a second position closer to the bobbin than the first position when the thread end is sought on the bobbin by the extraction mouth; and (c) at a third position more distant to the bobbin than the first position when the thread lifter is actuated for lifting the thread from the thread traversing device.

8. The method according to claim 7, wherein the second position of the extraction mouth is adjusted as a function of bobbin diameter or the thread to be received.

9. A spinning machine having a plurality of spinning units for production of a thread, wherein each spinning unit comprises: a thread delivery device with delivery rollers that draw off the thread from the spinning unit and deliver the thread to a bobbin; a thread traversing device that lays the thread on the bobbin; a winding device that winds the thread onto the bobbin; and a suction nozzle that finds a thread end wound on the bobbin, the suction nozzle comprising an opening turned towards the bobbin circumference that serves as an extraction mouth for sucking in the thread end; the suction nozzle further comprising an additional opening that serves as an inlet mouth for the thread, wherein during delivery of the thread to the bobbin, the thread enters the suction nozzle through the inlet mouth, runs through the suction nozzle, and exits the suction nozzle through the extraction mouth; wherein the suction nozzle is arranged directly in front of the bobbin such that the thread, starting from the thread delivery device, initially runs free and enters the suction nozzle directly in front of the bobbin.

10. The spinning machine according claim 9, wherein the suction nozzle is arranged at the spinning unit in a stationary manner.

11. The spinning machine according to claim 9, wherein the suction nozzle is connectable to an extraction system through the inlet mouth or through a further opening in the suction nozzle serving as a connection mouth.

12. The spinning machine according to claim 9, wherein the suction nozzle is connectable to an extraction system through a further opening in the suction nozzle serving as a connection mouth, and further a closing element configured with the inlet mouth to seal the suction nozzle upon the sucking in of the thread end.

13. The spinning machine according to claim 9, wherein the suction nozzle is connectable to an extraction system through the inlet mouth, and further comprising a connection element that is movable to the inlet mouth to connect the suction nozzle with the extraction system upon the sucking in of the thread end.

14. The spinning machine according to claim 9, wherein the extraction mouth is adjustable between a plurality of distance positions relative to a circumference of the bobbin.

15. The spinning machine according to claim 14, wherein the extraction mouth is configured with the thread lifter or with a thread guide of the thread traversing device at the spinning unit.

16. The spinning machine according to claim 15, wherein the thread traversing device and the winding device comprise individual drives.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages of the invention are described in the following embodiments. The following is shown:

(2) FIG. 1 is a schematic presentation of a workstation upon the delivery of a thread;

(3) FIG. 2 is the workstation from FIG. 1 upon the return delivery of the thread;

(4) FIG. 3 is a schematic presentation of a workstation with a suction nozzle with three mouths upon the delivery of a thread;

(5) FIG. 4 is the workstation from FIG. 3 upon the return delivery of the thread;

(6) FIG. 5 is a schematic presentation of an extraction mouth upon the delivery of a thread;

(7) FIG. 6 is the extraction mouth from FIG. 5 with a raised thread;

(8) FIG. 7 is the extraction mouth from FIG. 5 in a thread search position;

(9) FIG. 8a is a slotted link guide of a thread lifter in normal position;

(10) FIG. 8b is the slotted link guide from FIG. 8a with a retracted slotted link and a raised thread lifter; and

(11) FIG. 8c is the slotted link guide from FIG. 8a in a front position with a lowered thread lifter.

DETAILED DESCRIPTION

(12) 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.

(13) FIG. 1 presents a workstation 1 with a spinning unit 2, a thread delivery device 3, a suction nozzle 4, a thread traversing device 5 and a winding device 6. In the spinning unit 2, a thread 7 is produced and withdrawn by means of delivery rollers 8 from the spinning unit 2. The thread 7 then arrives, after it runs freely up to this point, directly in front of a bobbin 12 of the winding device 6 through an inlet mouth 9 into the suction nozzle 4, and exits again from it through the extraction mouth 10. From the thread traversing device 5 arranged between the extraction mouth 10 of the suction nozzle 4 and the winding device 6, the thread 7 is wound onto the bobbin 12 by means of a thread guide 11 that moves back and forth. The bobbin 12 rotates in the direction of the arrow, in order to wind the thread 7. The bobbin 12 is held in a bobbin arm 14 and is driven with a rotating winding roller 13. Given that the thread 7 runs freely over a long distance, it can be inserted between the delivery rollers 8 without any problem when attaching the thread 7, or fed into the spinning unit 2.

(14) A connection mouth 15 of a suction line 16 is arranged in the area of the inlet mouth 9. The suction line 16 is connected to an extraction system 17, in which negative pressure prevails. The suction line 16 can be shut off by means of a valve 18, such that, only when necessary, negative pressure applies at the connection mouth 15 of the suction line 16.

(15) The suction nozzle 4 with the inlet mouth 9 and the suction line 16 with the connection mouth 15 are designed separately from each other. While the thread 7 is delivered to the bobbin 12, the thread 7 runs past the connection mouth 15 and in the inlet mouth 9 into the suction nozzle 4. A connection element 19, which is capable of connecting the inlet mouth 9 to the connection mouth 15, is arranged laterally offset to the thread path, such that the thread 7 is not hindered.

(16) FIG. 2 shows the workstation of FIG. 1. In contrast to the presentation of FIG. 1, with FIG. 2, the thread 7 is delivered back by the bobbin 12. The thread 7 was previously broken, such that the thread end has been wound on the bobbin 12. In order to find and receive the thread 7 or its thread end, as the case may be, on the surface of the bobbin 12, the extraction mouth 10 of the suction nozzle 4 is subjected to suction. The suction takes place in such a manner that the connection element 19 connects the inlet mouth 9 to the connection mouth 15. Thus, with an opening of the valve 18, negative pressure from the extraction system 17 prevails in the suction nozzle 4 through the suction line 16. Thus, the connection element 19 creates a continuous suction channel, which consists of the suction nozzle 4, the connection element 19 and the suction line 16. After the thread 7 is found on the circumference of the bobbin 12, the thread 7 is sucked into this suction channel, and may then be further treated. A treatment may consist in the fact, for example, that the thread 7 is cut to length, and the thread end that thereby arises is prepared for a piecing in the spinning unit 2.

(17) Through the removal of the connection element 19 and thus the new opening of the suction nozzle 4, the thread end stretched by the negative pressure can be captured by the operator or a handling device and removed from the channel for further treatment.

(18) FIG. 3 shows an additional workstation 1, which is similar to the workstation 1 of FIG. 1. In contrast to the version of FIG. 1, however, this features a suction nozzle 4, which has three openings. In addition to the inlet mouth 9 and the extraction mouth 10, the connection mouth 15 is integrated in the suction nozzle 4. As with FIG. 1, a connection of the inlet mouth 9 and the connection mouth 15 is accordingly not necessary. In the normal thread pathupon the delivery of the thread 7the thread 7, as also previously described above, enters the suction nozzle 4 through the inlet mouth 9, and leaves it once again through the extraction mouth 10, before it is wound on the bobbin 12 rotating in the direction of the arrow. A closing element 28 is allocated to the inlet mouth 9. Upon the delivery of the thread 7, the closing element 28 is located outside of the thread path, in order to not disrupt it. The suction line 16 may be shut off.

(19) In FIG. 4, in a manner analogous to FIG. 2, with a workstation 1 in accordance with FIG. 3, the return delivery of the thread 7 or the thread end, as the case may be, is shown. The bobbin 12 rotates in the direction of the arrow counter to the winding direction. The thread end has been previously captured by the extraction mouth 10 of the suction nozzle 4 and extracted by suction by the negative pressure of the extraction system 17 with an open valve 18. In order to generate the highest possible negative pressure at the extraction mouth 10, the inlet mouth 9 is blocked by the closing element 28. The thread 7 is thus located in an essentially closed suction channel, which is formed from the suction nozzle 4, the closing element 28 and the suction line 16. In this case the connection mouth 15 is part of the suction nozzle 4.

(20) FIG. 5 shows in detail the suction nozzle 4 with the extraction mouth 10. The thread guide 11 of the thread traversing device 5 is arranged between the extraction mouth 10 and the bobbin 12 or the winding roller 13, as the case may be, which drives the bobbin 12. The thread guide 11 moves the thread 7 back and forth in front of the bobbin 12, such that a cross-wound bobbin is produced. A thread lifter 20 is arranged below the thread 7, between the extraction mouth 10 and the thread guide 11. In this presentation, which shows the delivery of the thread 7, the thread 7 extends away through the thread lifter 20.

(21) The thread 7 is detected in the suction nozzle 4 by means of a sensor 22. This sensor 22 may be active, for example, during normal thread delivery. However, it is more advantageous if the sensor 22 is used to detect whether the thread has been captured by the suction nozzle 4 upon the return delivery from the bobbin 12.

(22) At the extraction mouth 10, the thread 7 exits the suction nozzle 4. The extraction mouth 10 is arranged in a mouth piece 21, which is located in the suction nozzle 4. It may also be arranged, completely or partially, outside of the suction nozzle 4. The mouth piece 21 is attached in the suction nozzle 4 in a displaceable manner. The displacement essentially takes place in the longitudinal thread direction, such that the mouth piece 21 can be brought more or less close to the bobbin 12.

(23) As is shown in FIG. 6, the thread lifter 20 is coupled with the mouth piece 21. In FIG. 6, compared to FIG. 4, the mouth piece 21 is further away from the bobbin 12. Thus, it is further inserted into the suction nozzle 4. Thus, the mouth piece 21 or the extraction mouth 10, as the case may be, is located in a second position, which is further away from the bobbin 12 than it is in the first position of FIG. 5.

(24) Through the second position of the mouth piece 21 or the extraction mouth 10, as the case may be, the thread lifter 20 has been moved to a raised position. The thread lifter 20 engages in this position under the thread 7 and lifts it out of the thread guide 11. Thus, the thread guide 11 is no longer able to oscillate the thread 7 back and forth. This position is advantageous if the thread 7 is located in the suction nozzle 4, but a winding onto the bobbin 12 is not intended. This may be advantageous, for example, upon a controlled delivery stop of the thread 7. Another situation in which this position of the thread 7 outside of the thread guide 11 is desired, is (for example) upon the piecing of the previously broken thread 7.

(25) FIG. 7 shows a third position of the extraction mouth 10. In this position, the extraction mouth 10 is very close to the surface of the bobbin 12. Here, the mouth piece 21 is almost fully extended from the suction nozzle 4. The thread lifter 20 is located in a lower position, such that the mouth piece 21 can be moved away through it. In order to avoid a collision with the thread guide 11, the thread guide 11 has been moved from the area of the mouth piece 21 by means of the thread traversing device 5. The thread guide 11 is correspondingly located on the side of the mouth piece 21. By subjecting the suction nozzle 4 to negative pressure in accordance with the versions under FIGS. 1 to 4, negative pressure is applied to the extraction mouth 10, which sucks in a thread end found on the circumference of the bobbin 12. The bobbin 12 rotates in the direction of the arrow counter to the delivery direction, and thereby conveys the thread end into the suction nozzle 4. The sensor 22 detects whether the thread end is located in the suction nozzle 4, and may accordingly terminate the sucking in or initiate further handling steps.

(26) FIGS. 8a, 8b and 8c show a slotted link 23 for the thread lifter 20 in the three positions described above. The slotted link 23 is connected to the mouth piece 21 and is moved in the longitudinal direction together with the mouth piece 21. It features a slotted link guide 24 in which a slotted link block 25 is guided. The thread lifter 20 is connected through a rod 26 to an axis of rotation 27 and the slotted link block 25. Through the movement of the slotted link 23 in the longitudinal direction, the slotted link block 25 is moved within the slotted link guide 24 and correspondingly raises or lowers the thread lifter 20 to or from.

(27) In the presentation of FIG. 8a, the thread lifter 20 is located in a middle position. Accordingly, the slotted link 23 is also located in a middle position, which corresponds to the presentation in FIG. 5 with the corresponding mouth piece 21.

(28) If, together with the slotted link 23, the mouth piece 21 is moved into the remote position in accordance with FIG. 6 or 8b, the slotted link guide 24 causes the slotted link block 25 to be guided downward. Thereby, the thread lifter 20 is raised, in order to lift the thread 7 from the thread guide 11 in accordance with FIG. 6.

(29) FIG. 8c shows the front position of the slotted link 23 and the mouth piece 21 from FIG. 7. In this position, the slotted link block 25 is located at the other end of the slotted link guide 24. Through the axis of rotation 27, the thread lifter 20 is moved to a lower position, such that it frees the path for the mouth piece 21, and that the mouth piece 21 can be moved in the front position near the bobbin.

(30) This invention is not limited to the illustrated and described embodiments. Variations within the scope of the claims, just as the combination of characteristics, are possible, even if they are illustrated and described in different embodiments.

LIST OF REFERENCE SIGNS

(31) 1 Workstation 2 Spinning unit 3 Thread delivery device 4 Suction nozzle 5 Thread traversing device 6 Winding device 7 Thread 8 Delivery rollers 9 Inlet mouth 10 Extraction mouth 11 Thread guide 12 Bobbin 13 Winding roller 14 Bobbin arm 15 Connection mouth 16 Suction line 17 Extraction system 18 Valve 19 Connection element 20 Thread lifter 21 Mouth piece 22 Sensor 23 Slotted link 24 Slotted link guide 25 Slotted link block 26 Rod 27 Axis of rotation 28 Closing element