winding machine

Abstract

Winding machine for winding several threads to form one bobbin each, with two rotatably mounted winding spindles (2.1, 2.2) for receiving several tubes (7), on the circumference of which one of the threads (6) can be wound to form one of the bobbins, with a movable spindle carrier (3) for holding the winding spindles (2.1, 2.2), wherein the winding spindles (2.1, 2.2) can be guided alternately by the spindle carrier (3) into a winding area for winding the threads (6) and a changing area for removing the wound bobbins (15), with an auxiliary device (8) for guiding the threads during an initial application at the start of the process and for deflecting the threads during a spindle change during the process, wherein at the start of the process during the initial application and catching of the threads the auxiliary device (8) interacts with a suction device (14), characterized in that the auxiliary device (8) is formed by a movably held guide bar (9) with a plurality of thread guides (10) arranged next to one another at a distance along the guide bar (9), which thread guides (10) are movably held along the guide bar (9) extending parallel to the winding spindle (2.1) and can be positioned independently of one another in a plurality of positions.

Description

[0001] The invention relates to a winding machine for winding a plurality of threads according to the preamble of claim 1 and to a method for the initial application and spindle change of a thread group in such a winding machine according to the preamble of claim 9.

[0002] To wind a sheet of threads parallel to bobbins in a melt-spinning process for producing synthetic threads, automatic winding machines are typically used. The threads are wound alternately on two winding spindles. This allows the threads to be continuously wound into bobbins by changing the position of the winding spindles, which are alternately held by a movable spindle support in a winding area and a changeover area. To perform such spindle changes in an automatic winding machine, auxiliary devices are used to guide the sheet of thread during transfer between the winding spindles. For example, a winding machine and a method for changing the spindle are known from WO 99 / 12837 A1.This involves an auxiliary device in the form of a thread guide bar extending parallel to the winding spindles, which can be guided from a rest position to a catching position by means of a pivoting arm. This allows the threads in the area between the two winding spindles to be deflected together.

[0003] In addition to the auxiliary devices required for spindle changing, such winding machines also have additional auxiliary devices to enable the initial threading at the start of the process. During the initial threading, the sheet of threads is typically guided through a manually guided suction device, requiring the threads to be threaded and selected for the individual winding stations within the winding machine. For this purpose, the known winding machine has a positioning device with additional guide means that essentially enable the threads to be threaded into closely spaced thread guides and the threads to be selected. To prevent impermissible thread deflections and predetermined thread paths within the winding machine, the guide means for spindle changing and the guide means for initial threading work together.In this respect, the movement sequences of several guide means must be coordinated in order to enable predetermined thread guidance and, in particular, safe thread catching.

[0004] It is an object of the invention to provide a winding machine for winding several threads of the generic type, in which the threads can be guided with the least possible expenditure on equipment for initial application and spindle change.

[0005] It is also an object of the invention to provide a method for initial insertion and spindle change in such a winding machine, with which the threads can be guided as safely and gently as possible.

[0006] This object is achieved by the winding machine having the features of claim 1 and by the method having the features of claim 9.

[0007] Advantageous further developments of the invention are defined by the features and combinations of features of the respective subclaims.

[0008] The invention is characterized in that all auxiliary thread guides within the winding machine can be carried out by a common guide means, both during the initial application of the thread sheet and when changing the spindle of the thread sheet. Thus, both deflections of the threads along the winding spindles and deflections of the threads radially to the winding spindle can be combined according to the invention in such a way that the auxiliary device is formed by a common guide bar with several displaceable thread guides arranged next to one another at a distance along the guide bar. The guide bar and the thread guides are held movable and can be positioned independently of one another in several positions. This allows flexible thread guidance both when distributing the threads parallel to the winding spindle and when deflecting the threads radially to the winding spindle.In particular, it is possible to achieve a small number of contact points for guiding the threads, so that the threads can be guided with minimal thread wraps and thus with minimal additional thread tension during initial application and when changing the spindle.

[0009] The requirements for guiding the threads during initial application to a winding spindle located in the winding area can be advantageously improved by allowing the thread guides to be guided collectively between a collecting position and a placement position along the guide bar extending parallel to the winding spindle. Thus, the thread guides could be arranged directly adjacent to one another in the collecting position, allowing manual threading by an operator using a suction device in the form of a suction gun. For selection, the thread guides are then guided into their placement positions so that each of the threads is assigned to the tubes held on the circumference of the winding spindle.

[0010] According to an advantageous development of the invention, the positioning of the guide rail can preferably be realized by a pivotable support which holds the guide rail and, by means of a pivot drive, moves the guide rail back and forth between a rest position and several operating positions.

[0011] For threading the yarn sheet during initial insertion, the preferred embodiment of the invention is one in which, in one of the operating positions of the guide bar, the yarn guides are held in their collecting position at a short distance from one another at one end of the guide bar and can be guided into their insertion position after threading the yarns. Such a collecting position of the guide bar can be selected particularly with regard to ease of use. For example, the yarn guides on the guide bar can be guided into an upper operating position above the winding spindles.

[0012] It is particularly advantageous if the thread guides of the guide bar, in the collecting position, interact with stationary head thread guides located above the spindle carrier. This eliminates the need for additional auxiliary thread guides. In this case, the head thread guides can be formed by simply looped pins, rollers, or even eyelets.

[0013] Mechanical or pneumatic means can be used to perform a collective adjustment of the thread guides on the guide bar. According to an advantageous development of the invention, a particularly simple and reliable positioning of the thread guides on the thread guide bar is achieved by means of a cable pull.

[0014] Further advantages of the invention are described in more detail below using some embodiments with reference to the attached figures.

[0015] They represent: Fig. 1 schematically shows a side view of a first embodiment of the winding machine according to the invention Fig. 2 schematically shows a front view of the winding machine from Fig. 1 in different operating situations Fig. 3 schematically shows a front view of the winding machine from Fig. 1 in an operating situation Fig. 4 schematically shows an embodiment of a guide bar with movable thread guides

[0016] In the Fig. 1, Fig. 2 and Fig. 3 shows a first embodiment of a winding machine according to the invention. Fig. 1 shows the winding machine in a side view, in the Fig. 2.1, 2.2 and 2.3 is a front view of the winding machine during the initial threading and in Fig. Figure 3 shows a front view of the winding machine during a spindle change. The following description applies to all figures unless explicitly referenced to one of them.

[0017] The winding machine has a cantilevered winding spindle 2.1. The winding spindle 2.1 is rotatably mounted on a spindle support 3 and connected to a drive (not shown here). Several tubes 7 are placed one behind the other and clamped around the circumference of the winding spindle 2.1. The tubes 7 have a catching slot 16 at one end.

[0018] The spindle carrier 3 is rotatably mounted in a machine frame 1. In order to be able to wind several threads continuously without interruption after the start of the process, a second winding spindle 2.2 is mounted on the spindle carrier 3. The second winding spindle 2.2 is identical to the first winding spindle 2.1 and is arranged on the spindle carrier offset by 180°. For this purpose, the spindle carrier 3 is designed as a so-called winding turret and is connected to a rotary drive (not shown here). By rotating the spindle carrier 3, the winding spindles 2.1 and 2.2 can be guided alternately between a winding area for winding the threads and a changeover area for removing the wound bobbins.

[0019] In the depictions of Fig. 1 and Fig. 2, the winding spindle 2.1 is located in the winding area and the winding spindle 2.2 is located in the change area. In Fig. 3 shows a spindle change, so that the winding spindle 2.1 is guided in the change area and the winding spindle 2.2 in the winding area.

[0020] In the winding area, the winding spindles 2.1 or 2.2 interact with a pressure roller 5 arranged above the spindle support 3 and a traversing device 4 arranged above it. The traversing device 4 has a traversing unit for each winding station, through which a thread can be guided back and forth within a traversing stroke. The pressure roller 5 is preferably rotatably mounted on a rocker (not shown here) and is held on the circumference of the bobbin to be formed during winding of the threads. For this purpose, the pressure roller 5 extends essentially over the entire length of the winding spindle 2.1 or 2.2.

[0021] Above the traversing device 4, a head thread guide 17 is provided for each winding station, which forms the inlet of the threads 6 into the winding stations of the winding machine.

[0022] At the Fig. In the winding machine shown in Figure 1, a total of four tubes 7 are mounted on the winding spindle 2.1, so that a total of four threads 6 are wound parallel to one another to form a bobbin. The number of winding stations in this embodiment of the winding machine is exemplary. In principle, 8, 10, or 12 or even more tubes can be mounted on a winding spindle to wind the same number of threads into bobbins. The structure and function of the illustrated embodiment are independent of the number of winding stations.

[0023] To guide the thread sheet during the initial threading at the start of the process and during a spindle change during the process, an auxiliary device 8 is provided, which has both the guide means for guiding the threads during the initial threading and the guide means for guiding the threads during a spindle change. For this purpose, the auxiliary device 8 is formed by a guide bar 9 that extends essentially parallel to the winding spindle 2.1. The guide bar 9 extends essentially over the entire length of the winding spindle 2.1 and is coupled at one end to a carrier 11. The carrier 11 is pivotable and is held in the machine frame 1 via the pivot axis 13. A pivot drive 12 is assigned to the carrier 11 so that the carrier 11 can guide the guide bar 9 back and forth from a rest position into several operating positions.

[0024] Several thread guides 10 are movably arranged on the guide bar 9, which extends parallel to the winding spindle 2.1, in order to be guided back and forth between several positions in the longitudinal direction of the guide bar 9. The number of thread guides 10 on the guide bar 9 is identical to the number of winding stations in the winding machine, so that each winding station is assigned one of the thread guides 10. The thread guides 10 can be guided and coupled mechanically, electrically, or pneumatically.

[0025] In order to insert a sheet of multiple threads into the winding machine at the start of the process, the sheet of threads is first guided through a suction device 14. The suction device 14 is preferably designed as a suction gun and guided by an operator. For this purpose, the sheet of threads is continuously sucked from, for example, an upstream spinning device through the suction device 14 and guided to a waste container. To insert the threads into the process units or into the winding machine, the suction device 14 is manually guided by the operator. The threads 6 are thus first threaded into the head thread guides 17. In principle, however, designs are also known in which the insertion of the threads takes place automatically.

[0026] To further explain the initial installation process, we will now move on to the Fig. 1 and the Fig. 2.1 Reference is made to the Fig. As shown in Figure 2.1, in preparation for the initial feed process, the guide bar 9 is moved from a rest position to the side of the spindle support 3 to an upper operating position directly to the side of the pressure roller above the spindle support 3 and the winding spindles 2.1. For this purpose, the support 11 and the pivot axis 13 are pivoted via the pivot drive 12, so that the guide bar 9 is moved to the upper operating position, referred to here as the collecting position.

[0027] As can be seen in particular from the Fig. 1, the thread guides 10, which are movably held on the thread guide bar 9, are guided into a collecting position at the free end of the guide bar 9. In the collecting position, the thread guides 10 are located close to one another, so that the threads 6 can be easily threaded by the operator by guiding the suction device 14. After threading the threads 6 into the thread guides 10, they are guided from their collecting position into a positioning position. The positioning position is in Fig. 1 is shown in dashed lines. In the application positions of the thread guides 10, the threads 6 are distributed among the individual winding stations. The thread guides 10 are directly assigned to one of the tubes 7 held on the circumference of the winding spindles 2.1.

[0028] In the further course, the guide bar 9 is guided by the carrier 11 from the collecting position into a lower operating position. Fig. Figure 2.2 shows the situation in which the guide bar 9 is held in the lower operating position, which is defined here as the feed position. In parallel, a thread lifter 18 arranged above the traversing device 4 is activated in such a way that the threads 6 are prevented from falling into the traversing device 4. Fig. In the situation shown in Figure 2.2, the threads 6 are guided via the positioned thread guides 10 into the catching slot 16 of the tubes 7 on the circumference of the winding spindle 2.1. To apply and catch the threads 6 on the tubes 7, the spindle carrier 3 is rotated clockwise with the winding spindle 2.1 so that the threads 6 are guided around the tubes 7. The direction of rotation of the tubes 7, which are driven by the winding spindle 2.1, is parallel to the direction of thread travel. This situation corresponds to a synchronous running principle. The threads 6 are grasped by catching slots 16 of the tubes 7 and severed. To separate the threads 6, separate cutting means are preferably integrated into the thread guides 10.

[0029] After catching and separating the threads, the winding process begins. The guide bar 9 with the thread guides 10 is returned to the rest position next to the spindle carrier 3. This situation is Fig. 2.3. At the same time, the thread lifter 18 is pivoted out of the thread path so that the threads 6 fall into the traversing devices 4. The winding of the threads 6 into bobbins can now begin.

[0030] During the process, the spindles 2.1 or 2.2 are moved from the winding area to a change area for continuous winding of the threads when the final diameter of the wound bobbins is reached. Fig. 3 shows the situation in which the winding spindle 2.1 with fully wound bobbins is guided into the changeover area, so that the winding spindle 2.2 with empty tubes 7 reaches the winding area. In order to be able to carry out the thread transfer from the fully wound bobbins 15 on the winding spindle 2.1 to the empty tubes 7 on the circumference of the winding spindle 2.2, the guide bar 9 is guided from the rest position into another operating position between the two winding spindles 2.1 and 2.2 by activating the pivoting drive 12. This operating position is referred to as the catching position. In the catching position, the threads 6 are guided along a sliding edge of the guide bar 9. The thread guides 10 held on the guide bar 9 are in their application position in this situation. Thus, by activating the thread lifter 18, which guides the threads 6 from the traversing device 4, each of the threads 6 is positioned on the guide bar 9 by the thread guides 10.The threads 6 can now be applied and caught on the tubes 7 of the winding spindle 2.2. Once the threads 6 have been caught and separated, the guide bar 9 is pivoted back from the catch position to the rest position to the side of the spindle support 3. At the same time, the thread lifter 18 above the traversing device 14 is guided out of the thread path so that the threads 6 fall into the traversing units of the traversing device 4. The spindle change is complete, and the threads are wound into new bobbins on the winding spindle 2.2. In the following time, the full bobbins held on the winding spindles 2.1 can now be replaced with new tubes.

[0031] At this point it should be expressly mentioned that in the embodiment according to Fig. 1 and Fig. 2 are exemplary. Thus, it is possible that the lower operating position, which is designated as the application position during initial application, is identical to the catch position during a spindle change. However, additional intermediate positions are also possible, which could be assumed by the guide bar for guiding and positioning the threads. It is important here that both the radial deflection of the threads in the direction of the winding spindles and the deflection in the direction of the winding spindles can be executed by the guide bar 9.

[0032] In order to position the thread guide 10, which is movable on the guide bar 9, between a collecting position and a positioning position, Fig. 4 shows an embodiment of a possible displacement drive. In Fig. 4 shows only a top view of the guide bar 9, which is pivotally held at each end by a support 11 on a pivot axis 13. A cable 19 is arranged on the support 11 and is guided back and forth between two positions via a linear drive 20. A thread guide 10.1 assigned to the end of the guide bar is attached to the cable 19. Thus, the thread guide 10.1 can be guided back and forth between a placement position and a collection position.

[0033] The thread guide 10.1, which is guided via the cable pull, is connected to the other thread guides 10.2, 10.3, and 10.4 by a connecting means 21. A band is provided as the connecting means 21. This band is attached to one end of the guide bar 9 and has a length that determines the respective application position in which the thread guides 10.1, 10.2, 10.3, and 10.4 are positioned. Thus, by operating the cable pull, all thread guides 10.1 - 10.4 can be brought together on the guide bar 9 in a collecting position at the right end of the thread guide bar 9. By reactivating the cable pull to move the thread guide 10.1 toward the left end of the guide bar 9, the thread guides 10.1 to 10.4 are positioned in the respective application positions, thus selecting the threads for the winding stations within the winding machines.

[0034] The Fig.The embodiment shown in Figure 4 is only one possible mechanical embodiment for carrying out the movement of the thread guides 10 in the guide bar 9. In principle, pneumatic or electrical means can also be used to position the thread guides on the guide bar. List of reference symbols 1 machine frame 2.1,2.2 Winding spindle 3 spindle carriers 4 Traversing device 5 pressure roller 6 threads 7 sleeve 8 Auxiliary equipment 9 Guide rail 10 thread guides 11 carriers 12 rotary actuator 13 Swivel axis 14 Suction device 15 coil 16 Catch slot 17 Head thread guide 18 thread lifters 19 Cable pull 20 linear actuators 21 connecting devices

Claims

[1] Winding machine for winding several threads into one spool each, with two rotatably mounted winding spindles (2.1, 2.2) for receiving several spools (7), on the circumference of each of which one of the threads (6) can be wound to form one of the spools, with a movable spindle carrier (3) for holding the winding spindles (2.1, 2.2), wherein the winding spindles (2.1, 2.2) can be guided alternately by the spindle carrier (3) into a winding area for winding the threads (6) and a changeover area for removing the wound spools (15), with an auxiliary device (8) for guiding the threads during initial winding at the start of the process and for deflecting the threads during a spindle change during the process, wherein at the start of the process, during initial winding and catching of the threads, the auxiliary device (8) interacts with a suction device (14), characterized by, that the auxiliary device (8) is formed by a movable guide rail (9) with several thread guides (10) arranged at a distance from one another along the guide rail (9), which thread guides (10) are movable along the guide rail (9) extending parallel to the spool spindle (2.1) and can be positioned independently of one another in several positions. [2] Winding machine according to claim 1, characterized by , that the thread guides (10) on the guide bar (9) can be guided collectively between a gathering position with a small thread spacing and a placement position with a large thread spacing. [3] Winding machine according to claim 1 or 2, characterized by , that the guide rail (9) is held on a pivotable support (11) and can be moved between a rest position and several operating positions by means of a pivoting drive (12) acting on the support (11). [4] Winding machine according to claim 2 or 3, characterized by , that in one of the operating positions (collecting position) of the guide bar (9) the thread guides (10) are held in their collecting position at a short distance next to each other at one end of the guide bar (9) and can be guided into their laying position after threading the threads. [5] Winding machine according to claim 4, characterized by , that the thread guides (10) of the guide bar (9) in the gathering position cooperate with stationary head thread guides (17) arranged above the spindle carrier (3). [6] Winding machine according to any one of claims 3 to 5, characterized by , that in other operating positions of the guide bar (9) the thread guides (10) are held in their insertion position. [7] Winding machine according to any one of claims 1 to 6, characterized by , that the thread guides (10) on the guide bar (9) can be moved back and forth between their collecting positions and their laying positions by means of a rope pull (19). [8] Winding machine according to any one of claims 1 to 7, characterized by , that the guide bar (9) has one or more sliding edges which, in one of the operating positions (catching position) during spindle change, interact with the thread guides (10) held in their application position. [9] Method for initial setup and spindle change of a yarn set in a winding machine with two spool spindles for holding several spools, in which the yarns of the yarn set are individually assigned to the spools of one of the spool spindles held in a winding area for winding spools, in which, for initial setup, the yarns are continuously discharged together by a suction device after being threaded in several head yarn guides and until they are caught on the spools or in several catching devices assigned to the spools, and in which, for spindle change, the yarns are deflected together between one of the spool spindles held in the winding area and the other spool spindle held in a change area to catch on the spools or in several catching devices assigned to the spools, characterized by, that the threads are guided together through a movable guide bar during initial setup and during spindle changes, with the threads being positioned on the guide bar by thread guides that can be moved longitudinally and independently of each other. [10] Method according to claim 9, characterized by , that the following steps are taken when the sutures are first applied: 10.

1. Pivoting the guide rail from a rest position to a collecting position; 10.

2. Moving the thread guides on the guide bar into a gathering position and threading the threads into the thread guides; 10.

3. Separating the threads from their respective collection positions into individual placement positions of the thread guides on the guide bar, each corresponding to a sleeve; 10.

4. Deflection of the threads by pivoting the guide bar from the gathering position to a placement position, 10.

5. Attaching and catching the threads on the sleeves or on individual catching devices associated with the sleeves and 10.

6. Swiveling the guide rail from the insertion position to the rest position. [11] Method according to claim 10, characterized by , that the guide bar is moved relative to the stationary spool spindle to attach and catch the threads. [12] Method according to claim 10, characterized by , that to attach and catch the threads, the spool spindle is moved relative to the guide bar which is in the attachment position. [13] Method according to any one of claims 9 to 12, characterized by , that when changing spindles, the following steps are carried out to transfer the threads from one of the spool spindles with full spools to another spool spindle with empty spools: 13.

1. Change of position of the spool spindles by movement of the spindle carrier; 13.

2. Deflection of the threads between the two spool spindles by pivoting the guide bar from the rest position into a catching position; 13.

3. Attaching and catching the threads on the sleeves or on individual catching devices associated with the sleeves and 13.

4. Pivoting the guide rail from the snap position to the rest position.

Images