EP2231495B1 - Device for coiling a thread - Google Patents

Abstract

The invention relates to a device for coiling a thread into a spool (7.2) having at least one overhanging spool spindle (3.2), at least one spool sleeve (6.2) can be pushed on and clamped to receive a spool on the periphery thereof. To push off the spool sleeves after the spool is completely coiled, a push-off apparatus (8) is provided, which has a thrust element (15) movable parallel to the spool spindle. The thrust element is guided back and forth by a linear drive (16). In order to be able to push off both full spools and also empty spool sleeves using simple means reliably at high frequency, according to the invention, an axially movable thrust ring (13.2) is held on the periphery of the spool spindle, which forms a stop for the spool sleeves, wherein said thrust element is implemented such that the spools can be pushed off alternately without the thrust ring or with the thrust ring.

Description

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

In the production of synthetic threads, it is known that the threads are each wound into spools after melt spinning. To realize a continuous flow of material, it is preferred to use devices for winding with two winding spindles projecting in a cantilevered manner, which are arranged on a movable support and are guided alternately in a winding region and a change region. This allows the melt-spun filaments to be continuously wound into coils without interrupting the process. To accommodate the coils, a winding tube is pushed and clamped per winding position on the circumference of the winding spindle. In order to expel the winding tube held on the circumference of the winding spindle by a winding coil from the winding spindle, such devices have push-off devices which, parallel to the winding spindle, have movable push elements which enable the finished wound coil to be pushed off.

In the prior art, basically two different types of push-off devices are known, which are used for pushing one or more coils from a cantilevered winding spindle. A first type from which the invention proceeds, has a push element that acts on the winding spindle or the full bobbin from the outside. Here, the thrust element is brought from the outside with the deported coil or its winding tube into engagement, so that after releasing the winding tube on the circumference of the winding spindle, the finished wound coil is automatically pushed off. Such a device is for example from the EP 0 888 243 B1 known.

Due to the thrust element acting on the winding spindle from the outside, it is possible in this case in particular to push off coils which have not been completely wound with only a few turns or even empty winding tubes only if a sufficient engagement surface on the end faces of the winding tube or the wound turn as engagement of the pushing element available. Thus, a few turns on a winding tube can often only push down by manual support.

In a second type of deportation devices, for example, from the DE 100 23 909 A1 is known, a thrust ring is arranged on the circumference of the winding spindle, which is guided via a linear drive axially displaceable on the winding spindle. In such Abschiebeeinrichtungen the thrust ring engages directly on a front side of the winding tube, so that a pushing off of the winding tube is possible with finished wound coil or partially wound coil. However, such deporting devices have the great disadvantage that form by the recurrent back and forth on the circumference of the winding spindle wear both on the thrust ring and on the winding spindle. Furthermore, the winding tube must have sufficient stability, for example, to allow the removal of finished wound coils.

It is therefore an object of the invention to provide a device for winding a thread to a coil of the generic type with a push-off device that a fully automatic pushing off of coils or bobbins from the winding spindle and with high frequency is executable.

A further object of the invention is to make the push-off device in the device so flexible that it is possible to push it off the winding spindle in accordance with the state of the coil.

This object is achieved in that the circumference of the winding spindle, an axially movable thrust ring is held, which is a stop for the Coil sleeve forms, and that the thrust element is designed such that the coils can be pushed off either without the thrust ring or with the thrust ring. Advantageous developments of the invention are defined by the features and feature combinations of the respective subclaims.

The invention makes use of the fact that empty winding tubes or bobbins with a few turns of thread when winding up threads form a state of emergency which arises, for example, as a result of catching errors or yarn breakages. In contrast, the removal of the finished wound coils from the winding spindle forms the normal case and thus occurs with high frequency. The invention now has the particular advantage that the thrust element engages differently depending on the state of the coil. This allows the pusher element to engage directly with the spool or alternatively with a thrust ring. Thus, the thrust ring can advantageously be used only for pushing the empty winding tubes and coils with little turns, which are incurred only in exceptional circumstances. The predominant Ausschiebevorgang is performed by the attacking from the outside of the coil thrust element in a simple manner. Thus, the device according to the invention is preferably suitable for fully automated coil operations, in which after the removal of the coils, an automatic loading with empty tubes is performed on the winding spindle. A manual intervention is no longer necessary in any phase of the bobbin change.

In order to perform the optional engagement of the pusher element with simple means, the development of the device according to the invention is preferably used, in which the thrust element and the winding spindle are designed to be movable relative to each other radially to the winding spindle and are adjustable between two Abschiebpositionen. In this case, in one of the push-off positions, the push element acts directly on the push ring and in the other push-off position directly on the coil. Furthermore, the assignment of the coil to be taken from the winding spindle can take place directly depending on the selected Abschiebeposition. Thus, for example, from a first Remove all mis-wound bobbin removal position and remove immediately from the process. In the second Abschiebeposition all the finished wound and flawless coils can be deported and forwarded.

On the one hand, the relative mobility between the winding spindle and the pushing element can advantageously be carried out by holding the winding spindle on a rotatable bobbin turret, which is coupled to a rotary drive and which carries a second winding spindle offset by 180 °. In addition, continuous processes can be designed without interruptions.

However, it is also possible that alternatively the thrust element is arranged at the free end of a rotatable piston rod of the linear drive. Thus, the pusher can be guided in different Abschiebepositionen to deport the coils from the circumference of the winding spindle.

The connection between the thrust element and the thrust ring can be advantageously carried out by the development of the device according to the invention, in which the thrust ring has a peripheral thrust collar, which has a contact surface for engagement with the thrust element.

For this purpose, the push element is preferably formed by a profile plate with a free profile end opposite the winding spindle. The profile end of the profile plate has two thrust surfaces side by side, so that optionally one of the thrust surfaces cooperates with the thrust collar on the thrust ring and the other thrust surface on the end side of the spool. The thrust element thus acts as a simple pusher, which bears with a thrust surface on a corresponding contact surface of the part to be moved. The thrust surfaces can be formed both in a plane or offset from each other.

In order to make the optional engagement of the thrust element on the thrust ring or the spool, the device can alternatively also form such advantageous that the thrust element has a movable thrust plate which is adjustable in the direction of the winding spindle between two Abschiebepositionen, wherein at one of the Abschiebepositionen the thrust plate cooperates with the thrust ring and wherein in the other Abschiebeposition the thrust plate cooperates with the spool.

Due to the different interventions of the pusher element different Abschiebewege arise for pushing off the winding tubes or the coils on the winding spindle.

In order to comply with a defined Abschiebeweg, the development of the invention is preferably used, in which the thrust element for limiting a Abschiebeweges a proximity sensor is associated, which is coupled to a controller of the linear drive.

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 Seitenansicht eines ersten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

Fig. 2

schematisch eine Vorderansicht des Ausführungsbeispiels der erfmdungsgemäßen Vorrichtung aus Fig. 1

Fig. 3 und Fig. 4

schematisch eine Ausschnittansicht des Ausführungsbeispiels aus Fig. 1 und 2 in verschiedenen Betriebssituationen.

Fig. 5

schematisch eine Ausschnittsansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

Fig. 6

schematisch eine Seitenansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

They show:

Fig. 1

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

Fig. 2

schematically a front view of the embodiment of the inventive device Fig. 1

FIG. 3 and FIG. 4

schematically a partial view of the embodiment of Fig. 1 and 2 in different operating situations.

Fig. 5

schematically a sectional view of another embodiment of the device according to the invention

Fig. 6

schematically a side view of another embodiment of the device according to the invention

In the Fig. 1 and 2 a first embodiment of the device according to the invention for winding a yarn to a coil is shown schematically. The Fig. 1 represents the embodiment in a side view and the Fig. 2 in a front view. Unless expressly made to any of the figures, the following description applies to both figures.

The exemplary embodiment represents a device for continuous, uninterrupted winding of the thread. For this purpose, a winding point is formed in a machine frame 1. However, such devices are advantageously also operated with several winding points, wherein in the machine frame each of the winding stations for winding a yarn sheet are arranged side by side. However, it is not significant to the invention whether one or more coils are wound simultaneously. The invention extends to both versions. Regardless of the number of winding points, a projecting winding spindle 3.1 is provided for this purpose, which is driven by means of a spindle drive 5.1.

In the illustrated embodiment, the winding spindle 3.1 is held projecting on a winding turret 2. The winding turret 2 is rotatably mounted in the machine frame 1 and coupled to a rotary drive 4. About the rotary actuator 4, the spool turret can be rotated clockwise.

Offset by 180 ° to the winding spindle 3.1 coil spool 2 carries a second winding spindle 3.2, which is also projecting and is coupled at the bearing end with a second spindle drive 5.2. The winding spindles 3.1 and 3.2 can be rotated by rotation of the winding turret 2 alternately in a winding area and lead in a change area. In the Fig. 1 and 2 illustrated operating situation is the winding spindle 3.1 in the winding area and the winding spindle 3.2 in the change area.

In order to wind a thread 12 to form a coil 7.1, a winding tube 6.1 and 6.2 is pushed and clamped on the circumference of the winding spindle 3.1 as well as on the circumference of the winding spindle 3.2. The winding tubes 6.1 and 6.2 are for this purpose pushed over the free end of the winding spindle 3.1 and 3.2 previously.

In the winding area of the winding spindle 3.1 for winding the yarn 12, a pressure roller 9 and a traversing device 11 is assigned. The traversing device 11, the pressure roller 9 and the winding spindle 3.1 are held in the yarn path one behind the other on the machine frame 1 to deposit a tapered yarn 12 by back and forth within the traversing device 11 via the pressure roller 9 on the coil surface 7.1 to a cross winding. The pressure roller 9 is held on a roller carrier 10, which is preferably designed to be movable and serves as a sensor for controlling an evasive movement to be wound coil. For this purpose, for example, the stroke of the pressure roller 9 can be detected by a sensor which is connected to the rotary drive 4 of the winding turret 2 in a control circuit.

The traversing device 11 could in this case be designed both as a Flügelchangierung, a Kehrgewindewellenchangierung or a belt crossing. It is essential here that the traversing device 11 has means which guide the thread back and forth within a traversing stroke.

The pressure roller 9 is shown in this embodiment as a freely rotatable roller. In principle, however, there is also the possibility that the pressure roller 9 is associated with a drive which at least in phases, for example, during a Spulwechsels the pressure roller 9 drives at a predetermined peripheral speed.

With the in Fig. 1 and 2 illustrated operating situation is the winding spindle 3.2 with a full bobbin 7.2 in the change area. In the change region of the respective winding spindle - in this case, the winding spindle 3.2 - assigned to a removal device 8. The push-off device 8 has a movable thrust element 15 in the axial direction of the winding spindle 3.2, which is reciprocable by means of a linear drive 16 along the winding spindle 3.2. The thrust element 15 is associated with a thrust ring 13.2, which is held axially displaceable on the circumference of the winding spindle 3.2. The thrust ring 13.2 is pushed to the bearing end on the projecting winding spindle 3.2 and forms a stop for the winding tube 6.2. On the winding spindle 3.1 a thrust ring 13.1 is also pushed, which forms the stop for the deferred winding tube 6.1.

In the change region, the removal device 8 is used to deport the full bobbin 7.2 on the winding spindle 3.2, so that the winding spindle 6.2 can be equipped with a new winding tube. In this case, the thrust element 15 acts directly on an end face of the full bobbin 7.2, so that the thrust element 15 by activation of the linear drive 16, the full bobbin 7.2 slides off to the free end of the winding spindle 3.2 out.

When continuously winding a thread, for example in a melt spinning process, disturbances can not be ruled out which lead to a yarn breakage or to a catching error, so that a premature bobbin change must take place on the winding spindle held in the change region. In this case, it is necessary that coils with few turns or even empty winding tube on the winding spindle 3.1 or 3.2 are deported. In order to enable the deportation in such exceptional conditions, the thrust element 15 cooperates with the thrust ring 13.1 or 13.2. The thrust element 15 can thus be selectively engaged with the coil 7.2 or the thrust ring 13.2.

To further explain the embodiment of the removal device 8 is in addition to the 3 and 4 Referenced. In the FIGS. 3 and 4 are detail views of the embodiment shown in different operating situations.

In the embodiment according to Fig. 1 and 2 the thrust element 15 is formed by a profile plate 17 which is held at the free end of a piston rod 19. The profile plate 17 has a free profile end 18, on which two thrust surfaces 26.1 and 26.2 are formed side by side. The profile end 18 of the profile plate 17 is associated with the winding spindle in the change region, in Fig. 2 thus the winding spindle 3.2.

In order to enable the engagement of the thrust element 15 on the thrust ring 13.2, the thrust ring 13.2 on the winding spindle 3.2 a circumferential thrust collar 14 which is formed radially projecting to the winding spindle 3.2. The thrust collar 14 forms a contact surface for the thrust element 15. In order to bring the thrust element 15 with either the push ring 13.2 or the full bobbin 7.2 in contact, the winding spindle 3.2 is guided by rotation of the bobbin revolver 2 in two Abschiebepositionen.

In Fig. 3 the winding spindle 3.2 is held in the change region in a first Abschiebeposition by the winding turret 2. In this Abschiebposition the thrust collar 14 of the thrust ring 13.2 protrudes into the guideway of the profile plate 17 which contacts the thrust collar 14 with its thrust surface 26.2 directly. In this first Abschiebeposition can thus be advantageous to remove empty Spulhülsen or incomplete coils from the winding spindle 3.2. As soon as a thread occurs when winding up a yarn and a full bobbin can not be wound, the winding spindle 2, which is held in the control region, is directly moved into the first push-off position via a control device (not shown) - as in FIG Fig. 3 shown - lead.

In the normal case, when the thread is wound into a full bobbin and the winding spindle is guided with a full bobbin 7.2 in the change region, the winding turret 2 will lead the winding spindle directly into the second Abschiebeposition. In Fig. 4 schematically the second Abschiebeposition is shown, which is offset by a small angle of rotation of the winding turret 2 to the first Abschiebeposition. For clarity's sake is in Fig. 4 the contour of the full bobbin represented by a knotted dotted line. In this situation, the thrust collar 14 is not detected by the profile end 18 of the profile plate 17. The thrust surface 26.1 can thus be brought directly into contact with the end face of the full bobbin 7.2, so that when pushing off the full bobbin 7.2 the thrust ring 13.2 remains in its rear position on the winding spindle 3.2. In the normal case, therefore, only the full bobbin 7.2 with the winding tube 6.2 is deported from the winding spindle 3.2.

In the described embodiment, the Abschiebepositionen are approached by a relative movement between the winding spindle and the thrust element radially to the winding spindle. In this case, the movement sequence can advantageously be carried out by the winding turret 2. In principle, however, it is also possible for the winding spindle to remain in one position in the change region and for the separate removal positions to be formed by the push element. Such an embodiment is in Fig. 5 shown. The Fig. 5 shows only a partial view of the embodiment, which is otherwise completely identical to the aforementioned embodiment after Fig. 1 and 2 , In the in Fig. 5 illustrated embodiment, the thrust element 15 of the push-off device 18 is also formed by a profile plate 17. The profile plate 17 has a free profile end 18 opposite to the winding spindle 3.2. At the profile end 18, the thrust surfaces 26.1 and 26.2 are formed side by side. The profile plate 17 is fixedly connected to the piston rod 19. The piston rod 19 can be rotated by an actuator, not shown, between two angular positions, so that the profile plate 17 can be brought depending on the angular position of the piston rod 19 selectively with the thrust ring 13.2 or with the full bobbin 7.2 in engagement. At the in Fig. 5 situation is shown the profile plate 17 in the second Abschiebeposition in which the thrust surface 26.1 comes directly to rest on an end face of the winding tube 7.2. Between the profile end 18 and the thrust collar 14 of the thrust ring 13.2 is a small distance, so that the profile plate 17 is shifted back and forth independently of the thrust ring 13.2.

In a second angular position of the piston rod 19, the profile plate 13 is displaced relative to the winding spindle 3.2 such that the profile end of the profile plate 17 comes to cover with the thrust collar 14 of the thrust ring 13.2. In this case, when the linear drive is activated, the thrust surface 26.2 is brought to rest on the thrust collar 14, and as the movement progresses, the thrust ring 13.2 with the preceding winding tube 6.2 is pushed off the winding spindle 3.2. Thus both the unfinished coils and the fully wound coils can be removed from a fixed position of the winding spindle 3.2.

In Fig. 6 is a further embodiment of the device according to the invention shown in a side view. The exemplary embodiment is identical to the abovementioned exemplary embodiment, with the exception of the push-off device 8, so that reference is made to the aforementioned description and only the differences in the embodiment of the push-off device will be explained below.

At the in Fig. 6 illustrated embodiment, the thrust element 15 is formed by a movable thrust plate 21. The thrust plate 21 is held by a plate carrier 23 at a free end of the piston rod 19. On the plate carrier 23, the thrust plate 21 can be adjusted by an actuator 22 between an inner position and an outer position. The direction of movement of the thrust plate 21 points in the direction of the winding spindle held in the change region 3.2. The outer position of the thrust plate 21 on the plate carrier 23 in this case represents a first Abschiebeposition, in which the thrust element 15 cooperates with the thrust ring 13.2 and 13.1. In this case, the thrust plate 21 protrudes with a free end in the engagement region of the thrust collar 14 of the thrust ring 13.2, so that upon actuation of the linear drive 16, the thrust plate 21 directly detects the thrust collar 14 and the thrust ring 13.2 on the circumference of the winding spindle 3.2 shifts.

The inner position of the thrust plate 21 represents a second Abschiebeposition, in which the thrust plate 21 is pressed directly to the end face of the full bobbin 7.2. In this case, the full package with the winding tube 6.2 is deported from the winding spindle 3.2 upon actuation of the linear drive 16.

The linear drive 16 is formed by a piston-cylinder unit 26, the piston rod 19 being connected to a piston 27 guided inside the piston-cylinder unit 20. The piston-cylinder unit 20 is associated with a control unit 25 to control the movement of the piston 27 and thus the Kobenstange 19. To limit a Abschiebeweges the piston-cylinder unit 20 is associated with a proximity sensor 24 which is coupled to the control unit 25. Thus, regardless of the deporting position of the thrust plate 21, a defined Abschiebweg comply.

The aforementioned embodiments according to Fig. 1 to 5 can also be carried out with limited Abschiebeweg so that the pusher element 15 between a rest position and an operating position can be moved back and forth.

By in the Fig. 1 to 6 illustrated embodiments, only a few design options are shown by way of example. In particular, such embodiments of the thrust element are detected, which optionally allow a pushing off of the coils with the thrust ring or without the thrust ring. It is essential here that the pushing off by means of the thrust ring takes place only in the operating states in which an incomplete and not finished wound coil or even an empty winding tube is held in the change region.

LIST OF REFERENCE NUMBERS

1

machine frame

2

revolver

3.1,3.2

winding spindle

4

Rotary drive

5.1,5.2

spindle drives

6.1, 6.2

winding tube

7.1

Kitchen sink

7.2

full package

8th

Push device

9

pressure roller

10

roll carriers

11

Traversing device

12

thread

13.1, 13.2

thrust ring

14

thrust collar

15

push element

16

linear actuator

17

profile plate

18

profile end

19

piston rod

20

Piston-cylinder unit

21

pusher plate

22

actuator

23

plate carrier

24

Proximity sensor

25

control unit

26.1, 26.2

pushing surface

27

piston

Claims (8)

1. Apparatus for winding up a thread to form a bobbin (7.2), having at least one projecting bobbin-winding spindle (3.2), onto the circumference of which at least one bobbin tube (6.2) for receiving a bobbin (7.2) can be pushed and clamped, and having a pushing-off device (8) for pushing off the bobbin tube (6.2) after the bobbin (7.2) has been completely wound, wherein the pushing-off device (8) has a pushing element (15) which is movable parallel to the bobbin-winding spindle (3.1, 3.2) and can be guided back and forth by a linear drive (16),
   characterized in that
   on the circumference of the bobbin-winding spindle (3.2) there is held an axially movable pushing ring (13.2) which forms a stop for the bobbin tube (6.2), and in that the pushing element (15) is designed such that the bobbins (7.2) can be pushed off selectively without the pushing ring (13.2) or with the pushing ring (13.2).
2. Apparatus according to Claim 1,
   characterized in that
   the pushing element (15) and the bobbin-winding spindle (3.2) are designed to be movable in relation to one another radially with respect to the bobbin-winding spindle (3.2), and are adjustable between two pushing-off positions, wherein in one of the pushing-off positions the pushing element (15) acts on the pushing ring (13.2) and wherein in the other pushing-off position the pushing element (15) acts on the bobbin (7.2).
3. Apparatus according to Claim 1 or 2,
   characterized in that
   the bobbin-winding spindle (3.2) is held on a rotatable bobbin-winding turret (2) which is coupled to a rotary drive (14) and which carries a second bobbin-winding spindle (3.1) offset through 180°.
4. Apparatus according to one of Claims 1 to 3,
   characterized in that
   the pushing element (15) is arranged at the free end of a rotatable piston rod (19) of the linear drive (16).
5. Apparatus according to one of Claims 1 to 4,
   characterized in that
   the pushing ring (15.2) has a circumferential pushing collar (14) which forms an abutment surface for the engagement of the pushing element (15).
6. Apparatus according to Claim 5,
   characterized in that
   the pushing element (15) has a profile plate (17) having a free profile end (18) opposite the bobbin-winding spindle (3.2), two pushing faces (26.1, 26.2) being formed alongside one another at said free profile end (18), wherein one of the pushing faces (26.2) interacts with the pushing collar (14) on the pushing ring (13.2) and wherein the other pushing face (26.1) interacts with an end side of the bobbin (7.2).
7. Apparatus according to Claim 1,
   characterized in that
   the pushing element (15) has a movable pushing plate (21) which is adjustable in the direction of the bobbin-winding spindle (3.2) between two pushing-off positions, wherein in one of the pushing-off positions the pushing plate (21) interacts with the pushing ring (13.2) and wherein in the other pushing-off position the pushing plate (21) interacts with the bobbin (7.2).
8. Apparatus according to one of the preceding claims,
   characterized in that
   
   the pushing element (15) is assigned a proximity sensor (24) for limiting a pushing-off travel, said proximity sensor (24) being coupled to a control unit (25) of the linear drive (16).

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