CN116056994A - Device for drawing out and winding up threads - Google Patents

Abstract

The present invention relates to an apparatus for drawing out and winding up a plurality of threads in a melt spinning process. The device comprises a godet holder (5) for receiving at least two godets (6) having a driven godet housing (6.1), a frame (3) for receiving a plurality of winding stations (1.1 to 1.5) arranged in a distributed manner along a drivable winding spindle (14), and a thread-laying device (4). The thread laying device (4) has a movable thread guide (17) at each winding station (1.1-1.5), which can be guided back and forth between an engagement position and a working position for distributing the thread between the winding stations (1.1-1.5). In order to achieve a thread arrangement on the godet (6) without any action on the part of the operator, the thread arrangement device (4) according to the invention has a rotatable engagement roller (8) in the region of the godet (6), which can be guided between an engagement position and a working position for engaging the thread on the circumference of the godet housing (6.1).

Description

Device for drawing out and winding up threads

The present invention relates to an apparatus for drawing out and winding up threads in a melt spinning process according to the preamble of claim 1.

In the melt spinning process, the filaments produced in the form of filament sheets are drawn off by godet rolls, oriented and subsequently wound in parallel into bobbins at the end of the process. For this purpose, a drawing-off and winding device is used, which, depending on the production process, has a plurality of godets and a plurality of winding stations arranged below the godets and jointly in the machine frame. Due to the low constructional height and the compactness of such a device, the operator can perform manual operations in a simple manner, in particular at the beginning of the process. However, modern systems are fundamentally equipped with auxiliary devices to make operability easier for the operator. In order to dispense the threads of the thread piece, for example, between the winding stations and to be able to introduce the threads through at the beginning of the process, the threads are usually initially guided by means of a movable suction jet in order to be taken up by a thread guide and dispensed between the winding stations.

Such a generic device is disclosed, for example, by DE102017004866 A1. In this regard, a plurality of winding stations are arranged in a frame in a distributed manner along the driven winding spindles. A godet carriage, on which a plurality of godets for drawing out thread pieces are mounted, is supported on the top side of the frame. In the region between the godet and the winding station, a yarn laying device having a plurality of movable yarn guides is provided. The thread guides can each be guided within the guide rail between an engagement position and a working position for the purpose of distributing the thread between the winding stations. For this purpose, the wire guide is fixed to a guide rail, which can be displaced by the operator.

In principle, however, a thread laying device is also known in such a device, in which case the operator is further relieved from work, since the guidance of the thread guide in the guide rail between the engagement position and the working position can be controlled by means of an actuator. Such a device is for example used from WO2016/180679. In connection with this, the work of the operator at the beginning of the process is limited to the engagement of the thread pieces by simply looping over the godet housing of the godet before being distributed between the winding stations.

The object of the present invention is therefore to improve such a device for drawing and winding a wire in such a way that the wire laying device is also free from the work of the operator.

It is a further object of the present invention to provide such a device for drawing and winding a wire, the wire laying means of which allow for automated operability.

According to the invention, this object is achieved in that the thread-laying device has a movable engagement roller in the region of the godet, which can be guided between an engagement position and a working position for engaging the thread on the godet circumference.

Advantageous developments of the invention are defined by the features and feature combinations of the dependent claims.

A particular advantage of the invention is that at the beginning of the process, the thread guidance by means of the suction gun requires only a simple linear movement to keep the thread piece ready for reception by the thread laying device. In order to join the thread on the circumference of the godet housing, a rotatable joining roller is provided which can be guided between a joining position and a working position. An undesirable increase in the tension of the wire can be avoided by the joining roller even in the case of relatively large deflections of the wire. The take-up and feed-out of the thread flakes by means of the suction gun remains stable, since essentially no additional thread friction is produced by the rotatable joining roller.

In order to take up the thread in the region of the godet, the following development of the device according to the invention has proved particularly successful, in which the joining roller can be guided by a sliding guide groove on the godet carriage along a movement path intersecting the tangent of the godet housing of the godet. The thread web can thus be guided along the godet side in a straight thread course, so that the joining roller automatically takes the thread web during the guiding along the path of movement.

For this purpose, the joining roller is held in the joining position without contacting the wire and in the working position with contacting the wire. The circumference of the godet housing, which engages the thread piece to the godet, is then ensured by the movement of the engagement roller along the movement path. Once the engagement roller has reached the working position, the wire is engaged to the godet housing.

The joining roller is arranged on the carriage in a freely rotatable manner and/or in a manner drivable by a drive motor, depending on the yarn fineness and on the number of yarns guided by the joining roller for joining. The fine denier can thus also be engaged by the driven engagement roller. In this case, it is already possible to drive the joining roller in the joining position by means of a motor. But alternatively it is also possible to actuate the motor of the joining roller only in the working position to drive the joining roller.

The guiding of the carriage for moving the joining roller is preferably achieved by a controllable linear drive mechanism. Actuation of the linear drive mechanism to initiate joint operation by means of the joining roller may then be triggered manually by an operator or automatically by a timer.

In order for filaments formed from a number of synthetic filaments to have sufficient filament cohesion prior to the winding operation, it is basically known to intertwine them with air pressure. In this connection, the following development of the invention is preferably achieved in that the interlacing device is held on a godet carriage and the thread can be threaded into the interlacing device by the movement of the joining roller. Thus, no additional auxiliary devices are required to join the thread pieces to the godet and interlacing device at the beginning of the process.

In this connection, it is preferable to provide an arrangement in which the interlacing device is arranged in the course of the thread between the joining roller held in the operating position and one of the godets. The joining roller together with the downstream godet then runs across the (span) thread, in which the interlacing device is arranged.

In order to achieve a compact arrangement of the yarn laying device as possible even with a plurality of winding stations, it is also provided that the yarn guide is accommodated in a vertical guide of the guide rail, which is arranged laterally adjacent to the joining roller held in the joining position. In this way, a free space can be maintained in the region of the winding position, which is required for the removal of the full-wound bobbin.

For distributing the thread between the winding stations, the vertical guides of the guide rail are connected along the winding spindle to horizontal guides in which the thread guides can be guided for distributing the thread between the winding stations.

In order to obtain a defined guidance of the threads in the thread segments at a predetermined thread distance, the following development of the invention has proved successful, wherein a freely rotatable stationary guide roller for guiding the threads is provided, which is assigned to the thread guide held in the engagement position for separating and engaging the threads. The guide rollers allow to create a predetermined distance of the convergence point and thus the receiving position of the guide wire, as a result of which the wires in the wire sheet can be separated.

In order to automate the joining process by means of the thread laying device, the following inventive development is particularly advantageous in that the guide roller is arranged downstream of the godet housing, and the thread movement plane of the thread between the joining position and the working position of the joining roller and also in the region between the joining position and the working position of the thread guide is spanned by the godet housing and the guide roller. Thus, the actuation of the engagement roller and the actuation of the yarn guides to engage and dispense the yarn can be triggered in a synchronized manner or with a delay to obtain a short engagement time at the beginning of the process.

For automation, it is also provided that an actuator is assigned to one of the outer thread guides, by means of which the thread guides can be guided on the guide rail, wherein the thread guides are engaged with one another. The thread guides can then be guided from the engagement position into their respective working positions in an automated manner.

The device for drawing and winding threads according to the invention is particularly suitable for taking thread pieces from a spinning device in an automated manner in a short time at the beginning of the process.

For further explanation of the invention, embodiments of the device for drawing and winding a wire according to the invention will now be explained in more detail with reference to the accompanying drawings, in which:

figure 1 schematically shows a side view of an embodiment of the device for drawing and winding a wire according to the invention,

figure 2 schematically shows a front view of the embodiment of figure 1,

figures 3.1 to 3.3 schematically show side view details of the embodiment of figure 1 in various different operating conditions within the wire laying device,

fig. 4 schematically shows a rear view of the godet carriage of the embodiment of fig. 3.1.

An embodiment of the apparatus for drawing out and winding up a number of wires of the present invention is schematically shown in several views in fig. 1 and 2. This example is used in a melt spinning process to draw the freshly extruded filaments from a spinning apparatus and then wind each filament of a sheet of filaments to form a bobbin. In connection with this, fig. 1 shows this embodiment in a side view, and fig. 2 shows this embodiment in a front view. In the case where one of the drawings is not explicitly mentioned, the following description applies to all the drawings.

In this embodiment, the device for drawing and winding a wire according to the invention comprises a total of five winding stations 1.1 to 1.5, which are arranged adjacent to each other in the frame 3. The winding stations 1.1 to 1.5 are arranged along winding spindles 14 held in a protruding manner. In each winding station 1.1 to 1.5, the respective thread of the thread piece 2 is wound into bobbins 26, wherein the bobbins 26 are held adjacent to one another on the winding spindle 14. The number of winding stations 1.1 to 1.5 and the number of threads of the thread segments 2 are exemplary in this case. In principle, such an apparatus may comprise up to 16 winding stations.

The winding stations 1.1 to 1.5 have the same configuration and each have a traverse unit 13. Each traverse unit 13 comprises a guide mechanism (not shown in more detail here) in order to guide the threads assigned to the winding stations 1.1 to 1.5 back and forth in a single laying stroke. The traverse unit 13 may be formed of, for example, a reversible threaded rod traverse mechanism, a belt traverse mechanism, or a flyer traverse mechanism.

For parallel winding of the threads of the thread web 2, each winding station 1.1 to 1.5 is assigned a winding tube 16 on the circumference of the driven winding spindle 14. For this purpose, the winding tube 16 is clamped on the circumference of the winding spindle 14. In this case, the winding spindle 14 extends through all the winding stations 1.1 to 1.5, so that the threads are wound in parallel into bobbins 26 in the winding stations 1.1 to 1.5.

For depositing the thread onto the surface of the bobbin 26, a pressure roller 12 is provided, which runs parallel to the winding spindle 14 and is therefore assigned to the winding stations 1.1 to 1.5. The pressure roller 12 is arranged in the region between the traverse unit 13 and the winding spindle 14. The winding spindle 14 is mounted in a projecting manner on a winding turret 15 rotatably held in the frame 3. The winding turret 15 holds a second winding spindle 14, the second winding spindle 14 being arranged offset by 180 ° with respect to the first winding spindle 14. The rotation of the winding turret 15 allows the two winding spindles 14 to be alternately guided to the winding and replacement areas, so that the thread 2 can be wound continuously into bobbins 26 in the winding stations 1.1-1.5. Both the winding spindle 14 and the winding turret 15 are coupled to a driving mechanism (not shown here).

In the end-side region of the frame 3, the godet carriage 5 is arranged above the traversing unit 13. The godet holder 5 is supported on the frame 3. Two godet rollers 6 are arranged on the godet roller carriage 5. In this case, each godet 6 has a godet housing 6.1 protruding on the front side of the godet holder 5 and a godet drive 6.2 arranged on the rear side of the godet holder 5. Above the godet 6, a yarn collecting device 25 is arranged on the godet holder 5. The yarn collecting device has a suction removal unit 25.1 and a yarn collector 25.2.

Furthermore, interlacing devices 7 with respective treatment channels for each thread 2 are held on the godet carriages 5.

For joining the thread to the godet and into the winding stations 1.1 to 1.5 at the beginning of the process, a thread-laying device 4 is provided, which has a movable joining roller 8 on the godet carriage 5 and a movable thread guide 17 above the winding stations 1.1 to 1.5.

For an explanation of the wire laying device 4, reference is also made to fig. 3.1 to 3.3. Fig. 3.1 to 3.3 show side view details of the embodiment of fig. 1 in various operating conditions of the wire laying device 4. Referring also to fig. 4, there is shown the rear side of the godet holder 5 in the operating condition shown in fig. 3.1.

The joining roller 8 protrudes parallel to the godet housing 6.1 of the godet 6 on the front side of the godet holder 5. The joining roller 8 is held on the carriage 10 in a freely rotatable manner. The carriage 10 is guided in the slide guide 9. The sliding guide groove 9 extends between the godets 6 in such a way that the joining roller 8 can be guided along a movement path intersecting the tangent of the godet housing 6.1.

As is known from the illustration of fig. 4, the carriage 10 is connected to a linear drive mechanism 11. The linear drive 11 can be controlled by a control device (not shown here) such that the carriage 10 guides the engagement roller 8 back and forth between the engagement position and the working position. In this case, the linear drive 11 is shown by way of example in the form of a spindle drive connected to the carriage 10 by a spindle 11.1. The engagement position and the working position of the engagement roller 8 are in this case both arranged in the end region of the sliding guide groove 9. A more detailed explanation is given below regarding the function of the joining roller 8 for joining the thread piece 2 to the godet housing 6.1 and the interlacing device 7.

Furthermore, the godet drive 6.2 of the godet 6 and also the suction connection 25.3 and the collector drive 25.4 of the collector 25 are arranged on the rear side of the godet holder 5. The thread collector 25.2 can be actuated by a thread collector drive mechanism 25.4 to collect the thread pieces in case of a thread break and supply them to the suction removal unit 25.1.

For separating and distributing the thread segments 2, the thread laying device 4 has a respective thread guide in the form of a deflection roller 17 for each winding station 1.1 to 1.5. Each wire guide 17 is held on a guide rail 18 by a movable wire guide slide 19. The guide rail 18 is arranged in the upper region of the machine frame 3 and extends along the winding spindle 14 with a horizontal guide 18.1. The horizontal guide 18.1 is followed by an arcuate guide 18.2 of the guide rail 18, which extends beyond the spindle end of the winding spindle 14 toward the operating end. The arcuate guide 18.2 is followed by a vertical guide 18.3 which is oriented offset by about 90 ° relative to the horizontal guide 18.1 of the guide rail 18. A first stop 21 is formed on the guide portion 18 of the guide rail 18. The second stop 21 is arranged on the opposite free end of the horizontal guide 18.1 of the guide rail 18. The wire guide 17 can then be guided back and forth between the working position and the engagement position by the movement of the wire guide slide 19 along the guide rail 18. To this end, one of the outer wire guide carriages 19 is coupled to an actuator (not shown here). The actuator used may be, for example, a cylinder of the first or last wire guide slide 19 without a piston rod for displacing the wire guide 17 between its engagement position and its working position. Likewise, the actuator can also be realized by a linear electric drive, which extends parallel to the guide rail 18 and moves the associated thread guide slide 19.

As can be seen from the illustration in fig. 3.3, the thread guide slide 19 is connected by a flexible band 20. The length of the flexible band 20 is dimensioned such that, in the pulled-out state, each thread guide slide 19 is in the operating position of the associated thread guide 17 in the winding stations 1.1 to 1.5. The yarn guides 17, which are arranged in the form of deflection rollers, each form, in their operating position, ends of a traversing triangle which is produced during the yarn guidance by the traversing unit 13 when winding the yarn. The deflection rollers 17 then form the yarn inlets to the respective winding stations 1.1 to 1.5 in the working position.

In order to be able to join the thread segments 2 to the godet 6 and the winding stations 1.1 to 1.5 at the beginning of the process, the threads 2 are jointly guided by a suction gun 24. The suction gun 24 can in this case be guided by an operator or by an automated handling device. In this case, the yarn pieces drawn out from the spinning device are continuously fed to a waste yarn tank. Through the suction gun 24. The thread piece is then held by the suction chamber 24 on the freely rotatable guide roller 22. The guide roller 22 is arranged on the end side of the frame 3 in such a way that the plane of movement of the thread produced by the thread piece 2 spans as far from the circumference of the godet housing 6.1 as the guide roller 22. This situation is shown in fig. 3.1. In this case, the joining roller 8 is held in the joining position laterally adjacent to the thread movement plane without touching the thread. Also, the thread guides 17 are held substantially in the vertical guides 18.3 of the guide rail 18 laterally adjacent to the thread movement plane of the thread piece 2. The thread laying device 4 is then ready for joining the thread segments to the godet housing 6.1 and separating and distributing the thread segments between the winding stations 1.1 to 1.5.

In the case of manual operation, the operator moves the joining roller 8 by executing a control instruction to actuate the linear driving mechanism 11 through the operator control panel 23. The engagement roller 8 moves in the sliding guide slot 9 and automatically collects the thread pieces 2. The joining roller 8 produces loops of yarn in the yarn piece until the working position is reached. In the operating position of the joining roller 8, the thread piece 2 is guided on the circumference of the godet housing 6.1. In addition, the thread 2 is automatically guided into the treatment channel of the interlacing device 7. This situation is shown in fig. 3.2. The engagement roller 8 is locked and held in the working position. The joining roller 8 is preferably realized in a freely rotatable manner. In principle, however, the joining roller 8 can also be driven by a motor. The motor may be fixed to the carriage 10 at the rear side of the godet holder 5. The drive mechanism of the joining roller 8 can then already be actuated in the joining position, so that the joining roller 8 is driven during the formation of the wire loop.

In order to distribute the thread 2 between the individual winding stations 1.1 to 1.5, an actuator (not shown here) is activated to displace the thread guide slide 19. The actuation may be accomplished by an additional handle of the operator or alternatively in a time controlled manner after actuation of the engagement roller linear drive mechanism. In the drawing plane, the yarn guides or deflection rollers 17 can be guided from the engagement position into the working position by way of being offset from one another, so that the yarn is separated and each deflection roller 17 receives a respective yarn. The guide roller 22 has a guide groove on the circumferential surface to form a yarn convergence point. The thread 2 then moves in a radiation-like manner from the circumference of the godet housing 6.1 to the guide roller 22. In this way, a predetermined thread pitch is set in the thread piece in the region of the deflection roller 17. Once the thread guide 17 has reached the working position in the winding stations 1.1 to 1.5, the thread piece 2 is transferred by means of the suction gun 24 to an auxiliary device (not shown here in more detail) so that the thread 2 can be grasped and winding of the thread 2 started in the winding stations 1.1 to 1.5. The suction gun 24 can in this case be actuated by an operator or alternatively guided by an automated handling device. In this connection, the device for drawing out and winding up a wire according to the invention is particularly suitable for achieving fully automatic process control.

Claims (13)

1. An apparatus for drawing out and winding a thread in a melt spinning process, comprising a godet holder (5) for receiving at least two godets (6) having a driven godet housing (6.1), a frame (3) for receiving a plurality of winding stations (1.1-1.5) arranged in a distributed manner along a drivable winding spindle (14), and a thread-laying device (4) having a thread guide (17) on each winding station (1.1-1.5), the thread guide (17) being guided between an engagement position and a working position for distributing the thread between the winding stations (1.1-1.5), characterized in that the thread-laying device (4) has a rotatable engagement roller (8) in the region of the godet housing (6) which can be guided between an engagement position and a working position for engaging the thread on the circumference of the godet housing (6.1).

2. The apparatus according to claim 1, characterized in that the joining roller (8) can be guided by means of a sliding guide groove (9) on the godet holder (5) along a movement path intersecting a tangent of the godet housing (6.1) of the godet (6).

3. The apparatus according to claim 2, characterized in that the joining roller (8) is held in the joining position out of contact with the wire (2) and in the working position in contact with the wire (2).

4. A device according to any one of claims 1-3, characterized in that the joining roller (8) is arranged on the carriage (10) in a freely rotatable and/or motor-drivable manner.

5. The device according to claim 4, characterized in that the carriage (10) can be guided in the sliding guide (9) by means of a controllable linear drive (11).

6. The apparatus according to any one of claims 1 to 5, characterized in that interlacing means (7) are held on the godet carriage (5) and the thread (2) can be introduced into the interlacing means (7) by the movement of the joining roller (8).

7. The apparatus according to claim 6, characterized in that the interlacing device (7) is arranged in the course of the thread between the joining roller (8) and one of the godets (6) held in the operating position.

8. The apparatus according to any one of claims 1 to 7, characterized in that the wire guide (17) is held in the engagement position in a vertical guide (18.3) of a guide rail (18), which extends laterally adjacent to the engagement roller (8) held in the engagement position.

9. The apparatus according to claim 8, characterized in that said guide rail (18) has at least one horizontal guide (18.1) along said winding spindle (14), said horizontal guide being connected to said vertical guide (18.3).

10. Apparatus according to any one of the preceding claims, characterized in that a freely rotatable stationary guide roller (22) is provided for guiding the thread, which stationary guide roller (22) is assigned to the thread guide (17) held in the engagement position for separating and engaging the thread.

11. The apparatus according to claim 10, characterized in that the guide roller (22) is arranged downstream of the godet housing (6.1) and that a wire movement plane of the wire between the engagement position of the engagement roller (8) and the working position and also in the area between the engagement position and the working position of the wire guide (17) can be spanned by the godet housing (6.1) and the guide roller (22).

12. The device according to any one of claims 1 to 11, characterized in that one of the outer wire guides (17) is assigned an actuator by means of which the wire guides (17) can be guided on the guide rail (18), wherein the wire guides (17) engage each other.

13. The apparatus according to any one of claims 1 to 12, characterized in that the wire guide (17) of the wire laying device (4) is formed by a freely rotatable deflection roller.

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