EP2665668B1 - Apparatus for continuously winding up a thread - Google Patents

Description

The invention relates to a device for the continuous winding of a thread according to the preamble of claim 1.

In the production of synthetic threads, it is known that the threads are wound up into a coil at the end of the process. In order to avoid process interruptions in melt spinning, the filaments are continuously wound into coils without significant interruption. For this purpose, the devices for continuous winding provided for this purpose have two winding spindles projecting on a turntable, which are guided by rotation of the turntable alternately into a winding area and a changing area. Such a device is for example from the DE 197 43 278 A1 known.

The known device has a movable changing device, which can be guided in the region between the two winding spindles in order to be able to carry out a yarn transfer between the winding spindles. It is essential here that the thread can be taken over by a catching device which is arranged on the take-up spindle of the winding spindle. For this purpose, the changing device has at least one deflection yarn guide and a contact yarn guide. In the known device, the changing device is moved after the replacement of the winding spindles in the thread running between the thread-dispensing winding spindle and the thread-receiving winding spindle. The thread is still wound on the bobbin, which is held on the thread-releasing winding spindle. In a deflection position of the changing device, the deflection thread guide grips the thread and keeps it at a distance from the receiving winding spindle, on the circumference of which an empty tube is held. About the plant thread guide is then released the thread in a traversing device of this positioned to be guided by a rearward movement of the changing device in the catching device of the receiving winding spindle. For this purpose, the thread is detected by a curved hook of the contact thread guide and pulled into the catching device.

In the known device, it is disadvantageous that the entire changing device must be pivoted out of the deflection position for stirring the thread into the catching device. By activating and moving the overall device, longer changeover times for transferring the thread are unequal. In addition, the thread is considerably mechanically stressed by pulling, so splitting and damage of individual filament strands are inevitable. In particular, the splicing of the thread is particularly problematic in so-called BCF yarns, since the crimp contained in places has flaws. In that regard, the wound during the yarn transfer to the full package as a so-called abdominal belt thread pieces can not be used for a further processing.

The EP 0 367 253 A1 For example, a device for continuous winding discloses a fade with two winding spindles projecting on a turntable. This device is associated with a deflection yarn guide, with which the yarn is feasible during a bobbin change. The device is based on the fact that in a bobbin change the winding spindle which takes over the thread is guided into a yarn path between a full bobbin and a traversing device so that the yarn is subjected to considerable mechanical loading.

From the EP 0 521 816 B1 a further device for the continuous unwinding of a thread is known, in which the changing device is held laterally next to the winding spindles and cooperates with a movable deflection rod, which can be pivoted from an opposite side into the yarn path between the two winding spindles and deflects the yarn in the direction of the changing device. The changing device has an alternating sheet and a contact yarn guide, which is designed as a hook wing and a guided on the alternating sheet thread leads parallel to the winding spindle. In this case, the changing device is pivoted in the direction of the winding spindles so that the thread is guided with contact on an empty tube of the take-over winding spindle and by movement of the yarn to transfer the thread into a catching device of the winding spindle

Applying yarn guide is guided in an axially offset thread catching slot. In this device, therefore, the thread is mechanically stressed considerably by contact with the empty tube, so that damage is inevitable. Thus, the wound during the change process abdominal fascia of the full bobbin also can not be used for further processing.

It is an object of the invention to develop a device for the continuous winding of a thread of the generic type such that at relatively short change times a gentle change of thread can take place after replacement of the winding spindles.

This object is achieved in that the deflection yarn guide is formed as a guide plate with a sliding edge, which has at least one deflection and a transverse thereto formed feed section, that the deflection leads the thread without contact between the thread and the thread take over the winding spindle and that the application section of the sliding edge forms a catching plane with the catching device of the winding spindle which takes over the thread.

Advantageous developments of the inventions are defined by the features and feature combinations of the respective subclaims.

The invention is characterized in that the thread for transfer between the winding spindles receives a forced operation, which is essentially carried out by a sliding edge of a guide plate. When positioning the changing device in the deflection position, the thread can be held alone by a deflection section of the sliding edge of the guide plate at a distance from the winding spindle receiving the thread. In order to transfer this with appropriate positioning of the thread in the catching device of the winding spindle, the guide plate has a transverse to the deflection section formed on the landing section, on which the thread also by sliding along can be guided directly into the catching device of the winding spindle. Thus, no further movements of the changing device are required. By appropriate design of the guide plate, the thread can be guided over the contact portion of the sliding edge directly into the catching device of the winding spindle. The mechanical stresses generated by deflection and guidance of the thread are reduced to a minimum, so that the wound during the change phase as a corseted thread on the thread-dispensing spindle has qualitatively no significant changes.

For the transfer of the thread in the catcher of the winding spindle, the development of the invention is particularly preferred in which the contact yarn guide is designed to be movable with a free leading end, that the thread for transfer to the catcher at the Anlegeabschnitt the sliding edge of the guide plate is feasible. Thus, a fast and targeted insertion of the thread in the catcher can be further improved.

Since a premature sliding of the thread on the still wound coil of the thread donating winding spindle must be prevented during the yarn transfer, the development of the invention is particularly advantageous in which the guide plate is assigned a yarn stopper, by which an axial movement of the yarn on the Thread-dispensing winding spindle is limited. Thus, the thread in a thread piece, which extends between the thread stopper and the thread take over the winding spindle, without problems in the axial direction parallel to the winding spindles, without slipping on the still wound coil.

The development in which the guide plate and the movable contact yarn guide are arranged on a holding plate and in which the holding plate by means of a parallel guide translationally between a Rest position laterally next to the winding spindles and the deflection position between the winding spindles is feasible, has the particular advantage that the changing device requires a small footprint within the overall device. In addition, the changing device can already lead in a relatively small time window during the movement of the turntable in the deflection position, so that a quick change process is executed.

On the one hand to allow a free guidance of the thread on the sliding edge of the guide plate and on the other hand to assist the sliding of the thread into the catching device, according to a further development of the invention, the holding plate has a guide slot directed transversely to the winding spindle, which laterally faces the guide plate for applying the thread in the catching device cooperates with the sliding edge of the guide plate. Thus, the holding plate can be extended to the sliding edge of the guide plate to assist the deflection of the thread through the guide plate.

For the yarn guide on the sliding edge of the guide plate, in particular, the embodiment of the invention has proven, in which the contact yarn guide is formed by a pivoting hook wing, which is sandwiched between the retaining plate and the guide plate. This makes it possible to perform thread changes at low thread tensions without the thread being caught by the contact thread guide. In addition, a fast movement of the hook wing is executable, which further leads to the improvement of changeover times.

For this purpose, the hook wing protrudes preferably with a free leading end over the sliding edge of the guide plate and is held with an opposite drive end to a pivot axis, wherein the Guide end of the hook wing overstretches the sliding edge of the guide plate during movement.

The drive end of the hook wing is preferably connected to an actuator, so that fast and precise movements for transferring the thread in the catcher are possible.

The device according to the invention is preferably used for winding a plurality of threads. For this purpose, several winding locations are formed in the device, wherein each of the winding spindles carries a plurality of empty tubes or a plurality of coils. In order to perform the change synchronously within the winding stations, the development of the invention is particularly advantageous in which a plurality of winding points are provided side by side in parallel and in which the holding plate carries a plurality of guide plates and several contact yarn guides, wherein between adjacent winding points one of a plurality of guide slots in the holding plate are formed.

The device according to the invention is used in particular for winding up so-called BCF yarns, which have a crimp and are used immediately after the melt-spinning process for a further processing process for the production of carpets. Such yarns are sensitive to mechanical loads, so that even the thread pieces of a wound on a full bobbin abdominal binder can be used without problems for the further processing process by the device according to the invention.

The invention will be explained in more detail with reference to some embodiments of the device according to the invention with reference to the accompanying figures.

Fig. 1

schematisch eine Vorderansicht eines ersten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

Fig. 2

schematisch das Ausführungsbeispiel aus Fig. 1 in einer geänderten Betriebssituation

Fig. 3

schematisch eine Seitenansicht des Ausführungsbeispiels aus Fig. 2

Fig. 4

schematisch eine Seitenansicht der Wechseleinrichtung des Ausführungsbeispiels aus Fig. 1

Fig. 5

schematisch eine Draufsicht der Wechseleinrichtung des Ausführungsbeispiels aus Fig. 1

Fig. 6

schematisch eine Draufsicht einer Wechseleinrichtung eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

They show:

Fig. 1

schematically a front view of a first embodiment of the device according to the invention

Fig. 2

schematically the embodiment of Fig. 1 in a changed operating situation

Fig. 3

schematically a side view of the embodiment of Fig. 2

Fig. 4

schematically a side view of the changing device of the embodiment of Fig. 1

Fig. 5

schematically a plan view of the changing device of the embodiment Fig. 1

Fig. 6

schematically a plan view of a changing device of another embodiment of the device according to the invention

In the Fig. 1 . Fig. 2 and Fig. 3 a first embodiment of the inventive device for continuously winding a thread is shown schematically in several views. Fig. 1 shows the embodiment in a front view and Fig. 3 in a side view. In Fig. 2 the embodiment is shown in a front view, the embodiment with respect to the figure in Fig. 1 represents a changed operating situation. The following description applies to all figures, insofar as no explicit reference is made to one of the figures.

The embodiment of the device according to the invention holds a rotatably mounted turntable 2 in a machine frame 1. On the turntable 2, two projecting winding spindles 3.1 and 3.2 are arranged on one side. The winding spindles 3.1 and 3.2 are offset by 180 held on the turntable 2. On the opposite side of the turntable 2, two spindle drives 4.1 and 4.2 are arranged, which are associated with the winding spindles 3.1 and 3.2. This is how the winding spindle becomes 3.1 driven by the spindle drive 4.1 and the winding spindle 3.2 by the spindle drive 4.2.

On the drive side of the device, a turntable drive 5 is provided, which is coupled via a drive system not shown here in detail with the turntable 2. The turntable 2 can be driven by activating the turntable drive 5 counterclockwise in the machine frame 1, so that the winding spindles 3.1 and 3.2 can be performed after completion of a winding operation between an upper Aufspulbereich and a lower change range.

The winding spindle 3.1 or 3.2 held in the winding area interacts with a pressure roller 6, which is held rotatably mounted in the machine frame 1, and a traversing device 7. The traversing device 7 is shown only schematically in this embodiment and can preferably be formed as a Flügelchangierung. Here, two rotating pairs of wings are used to reciprocate a thread within a traverse stroke for placement on a spool.

Above the machine frame 1, a head thread guide 8 is arranged to guide the inlet of a thread 9.

As in the illustration in Fig. 1 is shown, the thread 9 is wound into a coil 13 on the winding spindle 3.1. During the winding of the thread 9 to a spool 13, the turntable 2 can be pivoted by the turntable drive 5 stepwise or continuously so that increases with increasing coil diameter of the coil 13, the axial distance between the pressure roller 6 and the winding spindle 3.1. The pressure roller 6 is for this purpose preferably mounted on a movable rocker 29. Once an end diameter of the coil 13 is reached on the winding spindle 3.1, there is an exchange of winding spindles 3.1 and 3.2. For this purpose, the turntable 2 is activated, so that the winding spindle 3.2 in the upper Winding area and the winding spindle 3.1 are guided in the lower change range. In this situation, it is necessary that the thread is transferred from the winding spindle 3.1 to the winding spindle 3.2. In that regard, the winding spindle 3.2 is referred to as a so-called thread take over the winding spindle and the winding spindle 3.1 as so-called thread-releasing winding spindle below.

As in particular from the Fig. 2 and 3 shows, the embodiment has a laterally arranged next to the winding spindles changing device 10. The changing device 10 is designed to be movable and can be reciprocated between a rest position and a deflection position. In Fig. 1 the changing device 10 is shown in the rest position and in Fig. 2 and in Fig. 3 shown in the deflection position. The changing device 10 is in this case arranged on the opposite side to the thread guide, so that when adjusting the changing device 10 between the rest position and the deflection position this selbsttätig in the opposite yarn path of the coil 13 in the changing area wound thread is performed.

To explain the changing device 10 is in addition to the Fig. 4 and 5 Referenced. The Fig. 4 represents the changer 10 in a side view and Fig. 5 in a plan view. The changing device 10 has a deflecting yarn guide 14 which is formed as a guide plate 16 with a sliding edge 17. The sliding edge 17 of the guide plate 16 is in this case divided into a deflection section 17.1 and an Anlegeabschnitt 17.2. The deflection section 17.1 extends substantially parallel to the winding spindles 3.1 and 3.2. The contact section 17.2 is aligned transversely to the deflection section 17.1 and thus executed transversely to the winding spindle 3.1 and 3.2.

As in particular from the illustration in Fig. 4 shows, the sliding edge 17 forms at the Anlegeabschnitt 17.2 with a on the winding spindle 3.2 trained catcher 11.2 a catching plane 30. The catching plane 30 is in Fig. 4 as in Fig. 3 marked by a dash-dotted line.

The guide plate 16 is associated with the contact yarn guide 15, which is formed in this embodiment by a hook wing 21, in particular from the illustrations in Fig. 3 and 5 evident. The hook wing 21 has a leading end 23 with a guide nose 31.1. At the opposite drive end 24, the hook wing 21 is rotatably supported via a pivot axis 22. At the drive end 24, an actuator 25 engages, by which the hook wing 21 can be transferred from a fishing position to a docking position. In the Fig. 3 and 5 the hook wing 21 is shown in the catching position. In Fig. 5 the landing position of the hook wing 21 is shown in dashed lines.

The guide plate 16 and the hook wing 21 are arranged on an upper side of a holding plate 18. Here, the guide plate 16, the hook wing 21 and the holding plate 18 is so sandwiched together that the hook wing 21 between the guide plate 16 and the support plate 18 is freely feasible. The pivot axis 22 is fastened to the holding plate 18 for this purpose.

Like from the Fig. 3 . 4 and 5 shows, the holding plate 18 at the end of the guide plate 16 in the region of the sliding edge 17 on a guide slot 26, which extends substantially over the entire length of the Anlegeabschnitts 17.1 of the sliding edge 17. This makes it possible that the retaining plate 18 extends with a free end until shortly before the sliding edge 17 of the guide bush 16 and supports the deflection of the thread 9 between the winding spindle 3.1 and 3.2.

The guide slot 26 in the retaining plate 18 extends below the guide plate 16 to a thread stopper 27. The thread stopper 27 is arranged on the underside of the holding plate 18 and protrudes with a free end with respect to the sliding edge 17 of the guide plate 16. The thread stopper 27 likewise has a guide nose 31.2, which is designed to be opposite to the guide nose 31.1 formed on the hook wing 21.

The holding plate 18 is held in a parallel guide 19 and can be reciprocated in a straight line in the parallel guide 19 via a piston-cylinder unit 20.

To guide the thread between the winding spindles 3.1 and 3.2 and the transfer of the thread in the catcher 11.2 in the winding spindle 3.2, the changing device 10 is guided in the deflection position. In this case, the thread 9 is detected by the deflection section 17.1 of the sliding edge 17 of the guide plate 16. By the traversing movement of the thread 9 of this passes into a limited by the hook wing 21 and the thread stopper 27 guide portion on the guide plate 16. In this phase, the thread 9 is still wound on the bobbin 13 of the thread dispensing winding spindle 3.1.

In order to guide the thread into the catching device 11.2 of the winding spindle 3.2 which takes over the thread, the thread 9 is led out of the traversing device by an auxiliary device 28, which is not described here, and positioned in a catching position. The auxiliary device 28 is in the Fig. 1 to 3 indicated schematically and associated with the traversing device 7. Here, the auxiliary device 28 may be placed both in the yarn path in front of or behind the traversing device 7.

Once the thread 9 is released from the traversing device 7, the actuator 25 is activated in the changing device 10 in order to guide the hook wing 21 in rapid movement from its catching position into a contact position. In this movement, the hook wing 21 of the thread 9 in the Thread piece detected between the winding spindle 3.2 and 3.1 and striped along the sliding edge 17. The thread 9 in this case first slides along the deflection section 17.1 and then enters the catching plane 30 via the contact section 17.2 of the sliding edge 17. Through the hook wing 21, which completely overlaps the sliding edge 17 with its free leading end 23, the thread is guided purposefully into the catching device 11.2 of the winding spindle 3.2.

This situation is in the Fig. 4 characterized by a dashed yarn path.

Like from the Fig. 4 As can be seen, the movement of the thread in the thread piece between the holding plate 18 and the spool 13 is limited by the thread stopper 27 on the circumference of the thread-dispensing winding spindle 3.1. Thus, the yarn stopper 27 prevents that during the transfer of the thread 9 through the hook wing 21 this does not fall off the circumference of the still wound coil 13.

Once the thread is caught and severed in the catcher 11.2, the changer 10 is pivoted from its deflected position back to the rest position. The winding spindle 3.1 is braked to change the finished wound coil 13. Parallel to the winding spindle 3.2 a new coil is wound.

Alternatively, the changing device 10 could remain in the deflection position until the finished wound coil is braked. The changing device 10 can thus be used as a shielding means, which prevents the passage of lint and the loose thread end in the area of the winding of the new coil.

This in Fig. 1 to 3 illustrated embodiment of the device according to the invention can also be supplemented by other winding points, so that at the winding spindles 3.1 and 3.2 several coils are wound parallel side by side. In order to be able to perform a synchronous thread transfer between the winding spindles 3.1 and 3.2 in such multi-filament winding devices, is in Fig. 6 schematically shows an embodiment of a changing device, as it would be used, for example, to guide the yarn of three parallel threads in a device with three winding points. The embodiment of the changing device 10 is shown in a plan view. For this purpose, three guide plates 16.1, 16.2 and 16.3 are arranged at a distance next to one another on a holding plate 18. Each of the guide plates 16.1, 16.2 and 16.3 is identical to the guide plate 16 formed according to the aforementioned embodiment, so that no further explanation takes place at this point. The guide plates 16.1, 16.2 and 16.3 are each associated with the hook wings 21.1, 21.2 and 21.3, which are pivotally held on the holding plate 18 and are guided synchronously via the actuator 25. The design of the hook wings 21.1, 21.2 and 21.3 are also identical to the aforementioned embodiment.

On the underside of the holding plate 18, three thread stops 27.1, 27.2 and 27.3 are arranged at a distance from each other and upstream of the sliding edges 17 of the guide plates 16.1, 16.2 and 16.3.

On the holding plate 18 between the adjacent guide plates 16.1 and 16.2 and 16.2 and 16.3 each have a guide slot 26.1 and 16.2 formed to allow the sliding edge 17 of the guide plates 16.1 and 16.2 for guiding the threads in the catching devices. At the right end, the holding plate 18 is formed in the region of the last guide plate 16.3 with a cutout 32, which allows the free sliding of the thread on the sliding edge 17 of the guide plate 16.3. The retaining plate 18 is guided in the drawer-like manner in the parallel guide 19 and is reciprocated via a piston-cylinder unit 20 between the rest position and the deflection position.

The function for transferring the threads between the winding spindles is identical in the winding positions and designed according to the aforementioned embodiment. In that regard, a further explanation of a device with multiple winding positions is dispensed with.

For several winding stations can be with the embodiment of the changing device after Fig. 6 realize a high security against change, since the catching and guiding of the threads by the synchronously driven hook wings is done quickly and reproducibly. It can also be realized very short change times for the transfer of the threads.

The device according to the invention is characterized in particular by the fact that the thread is transferred after an exchange of the winding spindles by fast guided movements. Thus, the times in which the thread is deflected, can be minimized. In addition, the thread can be safely guide even at relatively low yarn tension, so that a particularly gentle thread guide is possible without mechanical damage to individual filaments. The special design of the thread guide means on the changing device by a sandwich construction prevents jamming and decaying of the thread during the transfer to the capture device. The thread can be safely guided along the sliding edge of the guide plate in each phase of the change process. The sliding edge of the guide plate determines the shape of the guideway of the thread, so that any contact between the thread and the thread receiving the winding spindle is prevented. The thread can be forcibly fed into the catching device.

LIST OF REFERENCE NUMBERS

1

machine frame

2

turntable

3.1, 3.2

winding spindle

4.1, 4.2

spindle drive

5

Turntable drive

6

pressure roller

7

Traversing device

8th

Yarn guide

9

thread

10

changer

11.1, 11.2

catcher

12.1, 12.2

winding tube

13

Kitchen sink

14

Auslenkfadenführer

15

Contact yarn guides

16

guide plate

17

sliding edge

17.1

deflection section

17.2

applying section

18

Halteblech

19

parallel guide

20

Piston-cylinder unit

21

hook wings

22

swivel axis

23

lead end

24

drive end

25

actuator

26

guide slots

27

thread stopper

28

auxiliary device

29

wing

30

capturing plane

31.1, 31.2

guide nose

32

neckline

Claims (9)

1. Apparatus for continuously winding up a thread, comprising two winding spindles (3.1, 3.2) which are held in a projecting manner on a rotary table (2), and which are associated with two spindle drives (4.1, 4.2), comprising a rotary table drive (5) by means of which the rotary table can be activated for exchanging the winding spindles (3.1, 3.2) between a winding region and a changing region, comprising a pressure roller (6) and a traversing device (7) both of which interact with the winding spindle (3.1, 3.2) held in the winding region for winding up the thread, and comprising a changing device (10) associated with the winding spindles (3.1, 3.2), which changing device is designed to move and which when exchanging the winding spindles (3.1, 3.2) guides the thread between the winding spindles (3.1, 3.2) for transferring the thread to a catching device (11.1, 11.2) on one of the winding spindles (3.2, 3.2), wherein the changing device (10) comprises at least one deflecting thread guide (14) and one movable feeding thread guide (15) and can be positioned with both thread guides (14, 15) in a deflecting position, in which the thread can be guided with a distance from the winding spindle (3.1, 3.2) receiving the thread, characterized in that the deflecting thread guide (14) is designed with a guide plate (16) with a sliding edge (17), which comprises at least one deflecting section (17.1) and one feeding section (17.2) which is transverse with respect thereto, the deflection section (17.1) guides the thread without a contact between the thread and the winding spindle (3.1, 3.2) receiving the thread and that the feeding section (17.2) of the sliding edge (17) forms a catching plane (30) with the catching device (11.1, 11.2) of the winding spindle (3.1, 3.2) receiving the thread.
2. Apparatus according to Claim 1, characterized in that the feeding thread guide (15) with a free end portion is designed to move in such a way that the thread can be guided on the feeding section (17.1) of the sliding edge (17) of the guide plate (16) to be transferred to the catching device (11.1, 11.2).
3. Apparatus according to Claim 1 or 2, characterized in that the guide plate (16) is provided with a thread stopper (27) which limits an axial movement of the thread on the winding spindle (3.1, 3.2) which dispenses the thread.
4. Apparatus according to any one of claims 1 to 3, characterized in that the guide plate (16) and the movable feeding thread guide (15) are arranged on a retaining plate (18) by means of a parallel guide (19) that can be translated between a rest position lateral to the winding spindles (3.1, 3.2) and the deflecting position between the winding spindles (3.1, 3.2).
5. Apparatus according to Claim 4, characterized in that the retaining plate (18) comprises a guide slot (26) that is located transverse to the direction of the winding spindle (3.1, 3.2) and laterally to the guide plate (16), which guide slot (26) interacts with the sliding edge (17) of the guide plate (16) for feeding the thread into the catching device (11.1, 11.2).
6. Apparatus according to Claim 4 or 5, characterized in that the feeding thread guide (16) is formed by a pivoting catch wing (21) which has been arranged in sandwich fashion between the retaining plate (18) and the guide plate (16).
7. Apparatus according to Claim 6, characterized in that the free end portion (23) of the catch wing (21) protrudes over the sliding edge (17) of the guide plate (16) and is held with a drive end (24) at a rotation axis (22), wherein during periods of movement, the free end portion (23) of the catch wing (21) moves over the sliding edge (17) of the guide plate (16).
8. Apparatus according to Claim 7, characterized in that the drive end portion (24) of the catch wing (21) is connected to actuator (25).
9. Apparatus according to any one of claims 1 to 3, characterized in that several winding points are provided in parallel fashion next to each other and that the retaining plate (18) supports several guide plates (16.1, 16.2, 16.3) and several feeding thread guides (21.1, 21.2, 21.3), wherein between adjacent retaining plates (16.1, 16.2, 16.3) one of several guide slots (26.1, 26.2) is designed in the retaining plate.

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