WO2022033919A1

WO2022033919A1 - Device for drawing off and winding threads

Info

Publication number: WO2022033919A1
Application number: PCT/EP2021/071623
Authority: WO
Inventors: Abdelati HAMID; Rainald Voss; Marc-André HERRNDORF
Original assignee: Oerlikon Textile Gmbh & Co. Kg
Priority date: 2020-08-08
Filing date: 2021-08-03
Publication date: 2022-02-17
Also published as: CN116056994A; DE102020004857A1

Abstract

The invention relates to a device for drawing off and winding a plurality of threads in a melt-spinning process. The device has a godet support (5) for receiving at least two godets (6) with driven godet casings (6.1), a machine frame (3) for receiving a plurality of winding stations (1.1 - 1.5), which are distributed along a driveable spool (14), and a thread laying device (4). The thread laying device (4) has, at each winding station (1.1 - 1.5), a movable thread guide (17), which thread guides are each guidable back and forth between a lay-on position and an operating position, to distribute the threads among the winding points (1.1 - 1.5). In order to make it possible for the threads to be laid on the godets (6) without any action on the part of an operator, the thread laying device (4), in accordance with the invention, has a movable lay-on roll (8) in the region of the godets (6), which is guidable between a lay-on position and an operating position to lay the threads on the circumference of the godets (6).

Description

Device for drawing and winding threads

The invention relates to a device for drawing off and winding up threads in a melt spinning process according to the preamble of claim 1.

In a melt spinning process, the threads produced as a sheet of threads are pulled off using godets, stretched and then wound parallel to bobbins at the end of the process. For this purpose, devices for drawing off and winding are used, which, depending on the manufacturing process, have several godets and several winding points arranged below the godets, which are arranged together in a machine frame. Due to the low overall height and the compactness of such devices, manual operation by an operator can be carried out in a simple manner, especially at the start of a process. In principle, however, today's systems are equipped with auxiliary devices in order to make them easier to use for the operator. For example, in order to be able to distribute and thread the threads of a group of threads to the winding points at the start of a process, it is common for the threads to first be guided over a movable suction injector so that they can be taken over by a thread guide and distributed to the winding points.

Such a generic device is known for example from DE 10 2017 004 866 A1. For this purpose, the winding points are distributed in a machine frame along a driven winding spindle. A godet carrier is supported on an upper side of the machine frame, on which several godets are arranged for drawing off a group of threads. In the area between the godets and the winding points, a thread laying device is provided which has several movable thread guides. The thread guides can be guided within a guide rail for distributing the threads to the winding points between a feed position and an operating position. The thread guides are attached to the guide rail, which is moved by the operator.

In principle, however, thread laying devices are also known in such devices, in which the work of the operator is further relieved in that the guidance of the thread guides in the guide rail between the feed positions and the operating positions can be controlled by an actuator. Such a device can be found, for example, in WO 2016/180679. In this respect, the activity of the operator at the start of a process is limited to applying the group of threads to the godet jackets of the godets with a single loop before distribution to the winding points.

It is therefore the object of the invention to further develop the generic device for drawing off and winding up threads in such a way that the work of the operator is further relieved by the thread laying device.

A further object of the invention is to provide a generic device for drawing off and winding up threads, the thread laying device of which enables automated operation.

The object is achieved according to the invention in that the thread laying device has a movable feed roller in the region of the godets, which can be guided between a feed position and an operating position for laying the threads on the circumference of the godets.

Advantageous developments of the invention are defined by the features and feature combinations of the dependent claims. The particular advantage of the invention is that at the start of the process, the guidance of the threads by means of a suction gun requires only simple linear movements in order to keep the group of threads ready to be taken over by the thread laying device. A rotatable feed roller, which can be guided between a feed position and an operating position, is provided for laying the threads on the circumference of the godet sleeves. Even with larger deflections of the threads, undesired increases in thread tension can be avoided by the feed roller. The pick-up and removal of the group of threads with the suction gun remains stable, since essentially no additional thread friction is generated by the rotatable feed roller.

To take over the threads in the area of the godets, the development of the device according to the invention has proven particularly useful, in which the feed roller can be guided by means of a carriage guide on the godet carrier on a movement path that crosses a common tangent on the godet jackets of the godets. In this way, the group of threads can be guided laterally next to the godets in a straight thread path, so that the feed roller automatically takes over the group of threads during guidance on the movement path.

For this purpose, the feed roller is held in the feed position without contact with the threads and in the operating position with contact with the threads. The application of the yarn sheet on the circumference of the godet jackets of the godets is thus ensured by the movement of the feed roller along the movement path. As soon as the feed roller has arrived in the operating position, the threads are applied to the godet jackets.

Depending on the thread count and depending on the number of threads that are guided through the feed roller for feeding, the feed roller is designed to be freely rotatable and/or drivable by a motor on a carriage carrier. In this way, even fine deniers can be rather be created. There is the possibility here that the feed roller is already being driven by the motor in the feed position. Alternatively, however, there is also the possibility that the motor of the feed roller is first activated in the operating position for driving the feed roller.

The carriage carrier is preferably guided for moving the feed roller by a controllable linear drive. The activation of the linear drive to start the feed process by the feed roller can thus be triggered manually by an operator or activated automatically by a timer.

In order for the threads formed from a plurality of synthetic filaments to have sufficient thread cohesion before being wound up, it is known in principle to swirl them by means of air pressure. In this respect, the further development of the invention is preferably implemented in which an intermingling device is held on the godet carrier and in which the threads can be threaded into the intermingling device by the movement of the feed roller. Thus, no additional auxiliary devices are required in order to place the group of threads on the godets and the entangling device at the start of the process.

For this purpose, the arrangement is preferably designed in which the interlacing device is arranged downstream in the yarn path between the feed roller held in the operating position and one of the godets. The feed roller thus spans the yarn path with the downstream godets, in which the interlacing device is arranged.

In order to obtain the most compact possible arrangement of the yarn laying device even with a plurality of winding points, it is also provided that the yarn guides in the feed positions be kept in a vertical guide section of a guide rail, which is located laterally next to the one in the feed position tion held investor role extends. In this way, a free space can be maintained in the area of the winding points, which is required to remove the wound full bobbins.

To distribute the threads to the winding points, the vertical guide section of the guide rail is connected to a horizontal guide section along the winding spindle, in which the thread guides can be guided to distribute the threads to the winding points.

In order to obtain a defined thread guide with predetermined thread distances within the group of threads, the development of the invention has proven itself, in which a freely rotatable stationary guide roller is provided for guiding the threads, which is assigned to the thread guides held in the feed positions for separating and feeding the threads is. A convergence point and thus a predefined distance from a take-over position of the thread guides can thus be realized by the guide roller, so that the threads can be separated within the group of threads.

To automate the feeding process by the thread laying device, the development of the invention is particularly advantageous in which the guide roller is arranged downstream of the godet jackets and in which the godet jackets and the guide roller create a thread running plane of the threads in the area between the feed position and the operating position of the feed roller and between the feed positions and the operating positions of the thread guide can be opened. It is thus possible to trigger the activation of the feed roller and the activation of the thread guides for feeding and distributing the threads in a synchronized manner or with a time delay in order to achieve short feed times when starting a process. For automation, it is also provided that one of the outer thread guides is assigned a positioning actuator, by which the thread guide can be guided on the guide rail, with the thread guides being coupled to one another. In this way, the yarn guides can be guided automatically from the feed positions to their respective operating positions.

The device according to the invention for drawing off and winding up threads is therefore particularly suitable for picking up a sheet of threads from a spinning device automatically and in a short time at the start of a process.

For further explanation of the invention, an exemplary embodiment of the device according to the invention for drawing off and winding up threads will now be explained in more detail with reference to the attached figures.

They represent:

Fig. 1 is a schematic side view of the embodiment of the yarn drawing and winding device according to the present invention

Fig. 2 is a schematic front view of the embodiment of Fig. 1 Fig. 3.1 to

3.3 shows a schematic detail of the side view of the exemplary embodiment from FIG. 1 in various operating situations in the thread-laying device

Fig. 4 is a schematic rear view of the godet carrier of the embodiment of Fig. 3.1

1 and 2, an embodiment of the device according to the invention for drawing off and winding up a plurality of threads is shown schematically in several ren views shown. The exemplary embodiment is used in a melt spinning process in order to draw off the freshly extruded threads from a spinning device and then to wind each thread in the group of threads into a coil. For this purpose, FIG. 1 shows the exemplary embodiment in a side view and FIG. 2 shows the exemplary embodiment in a front view. Insofar as no express reference is made to one of the figures, the following description applies to all figures.

In this exemplary embodiment, the device according to the invention for drawing off and winding up threads has a total of five winding positions 1.1 to 1.5, which are formed next to one another in a machine frame 3. The winding positions 1.1 to 1.5 are arranged along a winding spindle 14 which is held in a cantilevered manner. In each of the winding positions 1.1 to 1.5, one thread from a sheet of threads 2 is wound into a coil 26, the coils 26 being held next to one another on the winding spindle 14. The number of winding positions 1.1 to 1.5 and the number of threads in the sheet of threads 2 is an example here. In principle, such devices can have up to 16 winding positions.

The winding positions 1.1 to 1.5 are of identical design and each have a traversing unit 13 . Each of the traversing units 13 contains a guide means, not shown in detail here, in order to guide the threads assigned to the winding points 1.1 to 1.5 back and forth within a laying stroke. The traversing unit 13 can be formed, for example, by a reverse thread shaft traversing, a belt traversing or a vane traversing.

For the parallel winding of the threads of the group of threads 2, each of the winding columns 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 tubes 16 are clamped on the circumference of the winding spindle 14 . The winding spindle 14 extends over all winding positions 1.1 to 1.5, so that the threads are wound parallel to coils 26 in the winding positions 1.1 to 1.5.

A pressure roller 12 is provided for depositing the threads on the surfaces of the bobbins 26, which roller extends parallel to the bobbin spindle 14 and is thus assigned to the winding positions 1.1 to 1.5. The pressure roller 12 is formed in the area between the traversing units 13 and the winding spindle 14 . The winding spindle 14 is cantilevered on a winding turret 15 which is held rotatably in the machine frame 3 . The winding turret 15 holds a second winding spindle 14 which is offset by 180° to the first winding spindle 14 . Both winding spindles 14 can be guided alternately into a winding area and a changing area by rotating the winding turret 15, so that the threads 2 can be wound continuously into coils 26 in the winding positions 1.1 to 1.5. The winding spindles 14 and the winding turret 15 are each coupled to drives that are not shown here.

A godet carrier 5 is arranged above the traversing units 13 at a front end region of the machine frame 3 . The godet carrier 5 is supported on the machine frame 3 . Two godets 6 are arranged on the godet carrier 5 . Each godet 6 has a godet jacket 6.1 projecting on a front side of the godet carrier 5 and a godet drive 6.2 arranged on the rear side of the godet carrier 5. Above the godets 6, a thread collecting device 25 is arranged on the godet carrier 5. The thread collecting device has a suction device 25.1 and a thread gatherer 25.2.

Furthermore, an interlacing device 7 is held on the godet carrier 5 , which has a treatment channel for each of the threads 2 . In order to lay the threads on the godets and in the winding points 1.1 to 1.5 at the start of a process, a thread laying device 4 is provided which has a movable feed roller 8 on the godet carrier 5 and movable thread guide 17 above the winding points 1.1 to 1.5.

To explain the yarn laying device 4, reference is also made to FIGS. 3.1 to 3.3. FIGS. 3.1 to 3.3 show a section of the side view of the exemplary embodiment from FIG. 1 in various operating situations of the yarn laying device 4. In addition, reference is made to FIG. 4, which shows a rear side of the godet carrier 5 in the operating situation shown in FIG. 3.1.

The feed roller 8 protrudes parallel to the galette jackets 6.1 of the galettes 6 at the front of the galette carrier 5. The feed roller 8 is held on a slide carrier 10 so that it can rotate freely. The carriage carrier 10 is guided in a carriage guide 9 . The carriage guide 9 extends between the galettes 6 in such a way that the feed roller 8 can be guided along a movement path which crosses a tangent applied to the galette casings 6.1.

As can be seen from the illustration in FIG. 4, the slide carrier 10 is connected to a linear drive 11 . The linear drive 11 can be controlled by a control device, not shown here, in such a way that the slide carrier 10 guides the feed roller 8 back and forth between a feed position and an operating position. The linear drive 11 is shown here as a spindle drive, which is connected to the slide carrier 10 via a spindle 11.1. The feed position and the operating position of the feed roller 8 are each provided in the end regions of the carriage guide 9 . The function of the feed roller 8 for feeding the group of threads 2 to the godets 6.1 and the turbulence device 7 will be explained in more detail below. On the back of the godet carrier 5 are also the godet drives

6.2 of the godets 6 and a suction connection 25.3 and a gatherer drive 25.4 of the thread collecting device 25 are arranged. The thread gatherer 25.2 can be activated by the gatherer drive 25.4 in order to bring the sheet of threads together in the event of a thread breakage and to feed them to the suction device 25.1.

For separating and distributing the group of threads 2, the thread laying device 4 has a thread guide in the form of a deflection roller 17 for each winding point 1.1 to 1.5. Each of the yarn guides 17 is held on a guiding machine 18 by a movable guiding carriage 19 . The guide rail 18 is arranged in the upper area of the machine frame 3 and extends with a horizontal guide section 18.1 along the winding spindle 14. The horizontal guide section 18.1 is followed by a curved guide section

18.2 of the guide rail 18, which extends beyond a spindle end of the winding spindle 14 to an operator's end. The curved guide section 18.2 is followed by a vertical guide section 18.3, which is offset by approximately 90° relative to the horizontal guide section 18.1 of the guide rail 18. A first stop 21 is formed on the guide section 18.3 of the guide rail 18. At the opposite free end of the horizontal guide section 18.1 of the guide rail 18, a second stop 21 is provided. The thread guides 17 can thus be guided back and forth between an operating position and a feed position by moving the guide carriages 19 along the guide rail 18 . For this purpose, one of the outer guides is carriage 19 coupled to a control actuator, not shown here. A cylinder without a piston rod, for example, could be used as the actuating actuator in order to move the first or last guide carriage 19 for shifting the yarn guide 17 between its feed positions and operating positions. Likewise, the actuating actuator could also be designed as an electric linear drive, which extends parallel to the guide rail 18 and moves the relevant guide carriage 19 . As can be seen in particular from the illustration in FIG. 3.3, the guide carriages 19 are connected by a flexible band 20. The length of the flexible band 20 is dimensioned in such a way that, in the extended state, each guide carriage 19 assumes an operating position of the thread guide 17 in question in the winding positions 1.1 to 1.5. In their operating positions, the thread guides 17 designed as deflection rollers each form the end of a traversing triangle which is generated by the traversing units 13 during the guidance of the threads when winding a bobbin. In their operating positions, the deflection rollers 17 thus form a thread inlet to the respective winding points 1.1 to 1.5.

In order to be able to create the group of threads 2 at the beginning of the process on the godets 6 and the winding points 1.1 to 1.5, the threads 2 are guided together through a suction gun 24. The suction gun 24 can be guided here by an operator or an operating machine. The group of threads drawn off from a spinning device is fed continuously via the suction gun 24 to a thread waste container. The group of threads is now held on a freely rotatable guide roller 22 by means of the suction gun 24 . The guide roller 22 is arranged at the front end of the machine frame 3 in such a way that the group of threads 2 result in a thread running plane spanning from the circumference of the godet jackets 6.1 to the guide roller 22. This situation is shown in Figure 3.1. In this situation, the feed roller 8 is held in the feed position laterally next to the plane of the thread run without contact with the thread. Likewise, the yarn guides 17 are essentially held laterally next to the yarn running plane of the yarn sheet 8 in the vertical guiding section 18.3 of the guide rail 18. The yarn laying device 4 is now ready for laying the yarn sheet on the godet jackets 6.1 and for separating and distributing the yarn sheet on the winding points 1.1 to 1.5. In the case of manual operation, the operator executes a control command via a control panel 23 in order to activate the linear drive 11 for moving the feed roller 8 . The feed roller 8 is moved in the carriage guide 9 and automatically grasps the group of threads 2. The feed roller 8 creates a thread loop in the group of threads until it reaches the operating position. In the operating position of the feed roller 8, the group of threads 2 is guided on the circumference of the godet jackets 6.1. In addition, the threads 2 are automatically guided into the treatment channels of the interlacing device 7 . This situation is shown in Fig. 3.2. The feed roller 8 is locked and remains in the operating position. The feed roller 8 is preferably designed to be freely rotatable. In principle, however, there is also the possibility that the contact roller 8 is driven by a motor. Thus, the motor could be attached to the slide carrier 10 on the back of the godet carrier 5 . The drive of the feed roller 8 could thus already be activated in the feed position, so that the feed roller 8 is driven during the formation of the thread loop.

In order to distribute the threads 2 to the individual winding positions 1.1 and 1.5, a setting actuator (not shown here) for moving the guide carriage 19 is activated. The activation could take place through an additional movement of the operator or alternatively time-controlled after activation of the linear drive for the feed roller. The thread guides or the deflection rollers 17 can be guided in the plane of the drawing offset from one another from the feed position into the operating position in such a way that the threads are separated and each deflection roller 17 takes over one thread in each case. The guide roller 22 has a guide groove on the circumference, which forms a yarn convergence point. The threads 2 thus run radially from the circumference of the godet casing 6.1 to the guide roller 22. A defined distance between the threads is thus established in the group of threads in the region of the deflection rollers 17. As soon as the yarn guides 17 have reached their operating positions in the winding positions 1.1 to 1.5, the yarn sheet 2 is transferred by the suction gun 24 to an auxiliary device not shown in detail here. ben to allow catching and winding the threads 2 in the winding positions 1.1 to 1.5. The suction gun 24 can be guided here by an operator or alternatively by an operating machine. In this respect, the device according to the invention for drawing off and winding up threads is particularly suitable for realizing a fully automatic process control.

Claims

Device for drawing off and winding up threads in a melt spinning process with a godet carrier (5) for receiving at least two godets (6) with driven godet casings (6.1), with a machine frame

(3) for accommodating a plurality of winding positions (1.1 - 1.5), which are arranged distributed along a drivable winding spindle (14), and with a thread laying device (4) which has a thread guide (17) for each winding position (1.1 - 1.5), which Thread guides (17) for distributing the threads to the winding positions (1.1 - 1.5) can each be guided between a feed position and an operating position, characterized in that the thread laying device

(4) has a rotatable feed roller (8) in the area of the godets (6), which can be guided between a feed position and an operating position to feed the threads on the circumference of the godet casings (6.1). Device according to Claim 1, characterized in that the feed roller (8) can be guided by means of a carriage guide (9) on the godet carrier (5) on a movement path which crosses a tangent of the godet casings (6.1) of the godets (6). Device according to Claim 2, characterized in that the feed roller (8) is held in the feed position without contact with the threads (2) and in the operating position with contact with the threads (2). Device according to one of claims 1 to 3, characterized in that the feed roller (8) is designed to be freely rotatable and/or drivable by a motor on a carriage carrier (10).

5. Device according to claim 4, characterized in that the carriage carrier (10) can be guided in the carriage guide (9) by a controllable linear drive (11).

6. Device according to one of claims 1 to 5, characterized in that an interlacing device (7) is held on the godet carrier (5) and that the threads (2) can be threaded into the interlacing device (7) by the movement of the feed roller (8). are.

7. Device according to claim 6, characterized in that the interlacing device (7) is arranged in the yarn path between the feed roller (8) held in the operating position and one of the godets (6).

8. Device according to one of Claims 1 to 7, characterized in that the thread guides (17) are held in the feed positions in a vertical guide section (18.3) of a guide rail (18) which is located laterally next to the feed roller (8) held in the feed position. extends.

9. The device according to claim 8, characterized in that the guide rail (18) has at least one horizontal guide section (18.1) along the winding spindle (14), which is connected to the vertical guide section (18.3). Device according to one of the preceding claims, characterized in that a freely rotatable, stationary guide roller (22) is provided for guiding the threads, which is assigned to the thread guides (17) held in the feed positions for separating and feeding the threads. Device according to Claim 10, characterized in that the guide roller (22) is arranged downstream of the godet jackets (6.1) and that the godet jackets (6.1) and the guide roller (22) cause a thread running plane of the threads in the area between the feed position and the operating position of the feed roller ( 8) as well as between the feed positions and the operating positions of the yarn guide (17) can be clamped. Device according to one of Claims 1 to 11, characterized in that one of the outer thread guides (17) is assigned a positioning actuator, by which the thread guide (17) can be guided on the guide rail (18), the thread guides (17) being coupled to one another . Device according to one of Claims 1 to 12, characterized in that the thread guides (17) of the thread laying device (4) are formed by freely rotatable deflection rollers.

- 16-