EP1960301B1 - Method and machine for winding threads - Google Patents

Abstract

The invention relates to a method for catching and taking up as well as a winding machine for continuously winding up threads. In order to catch the thread on a winding spindle, two thread guides form a thread section upstream and downstream of the winding spindle. Preferably, said thread guides are simultaneously displaced in a synchronous manner during the catching process and in such a way that the thread section is guided vertically over the winding spindle. Preferably, the thread guides are simultaneously and synchronously displaced by coupling the thread guides to each other and displacing the same with the aid of a common drive unit.

Description

The invention relates to a method for winding a continuously tapered thread according to the preamble of claim 1 and a winding machine according to the preamble of the independent claim. A generic winding method and a winding machine are known from the published patent application DE 29 07 848 A1 ,

Winding machines serve to wind continuous filaments into coils. For this purpose, the threads are first changed by a traversing device transversely to the thread running direction and guided over a rotating pressure roller. The pressure roller sets the threads on each of the wound coils to be wound. Several coils are arranged in alignment one behind the other on a common winding spindle. This makes it possible to wind several threads at the same time.

For automated bobbin change the winding machines are designed with a plurality of winding spindles which are cantilevered on a winding spindle carrier rotatable about an axis. By rotating the Spulspindelträgers the winding spindle is alternately pivoted in a Aufspulbereich and in a change range. In the winding area, the thread is wound on a sleeve to form a bobbin. After the bobbin is wound to the end, the winding spindle with the winding spindle carrier is swiveled into the changing area. By the rotation of the Spulspindelträgers at the same time stocked with empty tubes winding spindle is pivoted from the change area in Aufspulbereich. As a result, the yarn, which continues to flow towards the bobbin, comes into contact with the other winding spindle already rotating in this phase. On the winding spindle or on the empty sleeves catch elements are provided which detect the current thread. The thread is now wound up by this winding spindle. The thread connection between The two winding spindles is separated or torn off in this process with a cutting means. Subsequently, the full bobbin is exchanged for an empty tube in the change area. During the described exchange process and immediately before the thread connection between the finished wound coil and the sleeve to be wound is separated, the thread runs on a certain portion of the finished wound coil. This forms a Fadenwulst, which is considered as the conclusion of the coil.

From the DE 103 33 273 A1 In addition, a method is known in which a thread section is formed with the aid of two thread guides, the thread guides leading the thread section through a uniform movement to a catching element. This catch element is a plurality of projecting in the axial direction of the winding spindle protrusions. As soon as the catch element grasps the thread section, the thread is wound onto a sleeve arranged on a spool mandrel. Another variation of this method is from the documents JP 59 223665 A and JP 59 223666 A known, in which the catch element is designed in the form of a slot in the winding spindle or sleeve, in which the thread catches when the thread is brought by two yarn guides with the catch element in engagement.

In addition, from the DE 197 30 721 A1 a method for winding threads on rotating spindles located on sleeves, wherein the winding spindles have a thread that extends from an area adjacent to the sleeve into an area under the sleeve. The thread is here brought into engagement with two thread guides with the thread, whereby the thread is pulled by the helical shape of the thread and the rotational movement of the winding spindle to a catch element.

In the development of winding machines above all the reliability of the thread changing process is in the foreground. These are factors on the one hand the catch element and on the other hand, the thread guide during the thread change process relevant.

From the prior art, it is known to integrate the catch element either in the sleeve or to provide on the winding spindle. The integration of the catch element on the sleeve means more elaborate and thus more expensive sleeves. In the case of a catching element on the winding spindle, on the other hand, the thread must be deflected more strongly, since the catching element is located further outside the traversing range of the thread. It's for example from the disclosure script DE 25 40 853 A1 instead of deflecting the thread, it is known to move the winding spindle axially. However, this solution can no longer be implemented in the course of ever longer winding spindles for receiving an ever higher number of coils and in the course of ever higher Aufspulgeschwindigkeiten in modern take-up machines with the high stiffness and play-free bearings required there.

In order to deflect the thread axially during the thread changing operation to a sufficient extent and at the same time to guide one hand perpendicular to the Spulspindelachse on the catch element and on the other hand to lead within the traversing range on the finished wound coil, sees in the DE 29 07 848 A1 disclosed invention several thread guide elements. This is a first thread guide element in front of the catch element, which guides the thread from the traversing area into the area of the catch element. Furthermore, a second thread guide element is arranged in the thread running direction behind the catch element. After the first thread guide element has led out the thread from the traversing area, the second thread guide element guides the thread into the area of action of the catching element. A third thread guide elements is finally seen in the thread running direction behind the second thread guide element arranged so that the thread is returned to the traversing area.

Especially in connection with high wind-up speeds, the thread guide during thread catching is of particular importance. This on the one hand, because the safety against falling with increasing winding speed. In addition, aggravating added that the lower fishing safety can not be compensated by a higher residence time in the catcher, since very quickly accumulates a large amount of thread in this area. Rather, the dwell time in the region of the catch element would actually have to be reduced with increasing take-up speed, which results in a conflict of goals here.

It is therefore an object of the invention to improve the safety of catching the known winding machines.

The invention pursues the approach to improve the precision with which the thread is guided over the catch element at the moment of catching. This is done by a method in which a portion of the thread source to a storage means, such as full bobbin or a Fadenabsaugpistole, current thread is displaced and thus supplied to the catch element by the thread section between two movable Spulspindelachsrichtung thread guide is performed and by this move both yarn guides at the same time.

In one form of the method, the displacement of the thread section is divided into two movement sections. In a first movement section, the thread is first guided in the direction of the catch element with the aid of the two thread guides, wherein the two thread guides are driven by separate drive means. This can be done in the case of a bobbin change from the traversing range of the full bobbin. In a second movement section, the thread section is then finally fed to the catch element, so that it interacts with the catch element. In this case, in the second movement section, the thread guides which define and guide the thread section are simultaneously moved by means of a common drive means. Between the first and second movement section there is a reversal of the direction of movement. As a result, the thread section can be returned to the traversing area immediately after catching the thread.

In a preferred form of the method, the yarn guides thereby proceed at the same speed.

In a particularly preferred form of the method, the thread section is substantially orthogonal to the winding spindle axis, so that it is guided into the catch element in an ideal manner.

In other forms of the method, the movement of the thread guide takes place partly successively or independently. As a result, process sequences which take place immediately before the bobbin change are particularly taken into account.

In a particularly preferred form of the method, the running direction of the thread and the peripheral speed of the catching element are rectified on the winding spindle. This allows a jerk-free catching of the thread in the catch element. During the fishing process and until the thread is taken over onto the winding spindle, the thread is moved onto a spool mounted on a second winding spindle wound. The thread is guided by a third thread guide so that it runs onto the peripheral surface of the coil.

A winding machine according to the invention for carrying out the method provides, in particular, means which exactly observe the maintenance of the angle and the speed with which the thread section is guided transversely over the catching element. The task of ensuring precision is achieved by the winding machine driving the two thread guides, which are important for the precision of the thread guide at the moment of catching, connected together by a common drive means. As a result, an exact guidance of the thread is achieved. Furthermore, the two yarn guides are initially moved out of the traverse stroke with independent drive means in a first direction of movement. This makes it possible to move independently of each thread guide for the thread guide optimally for this situation. For a relevant for the fishing second movement direction, the yarn guides are then connected to each other and moved by the common drive means.

In a preferred embodiment, a third thread guide is provided, which leads the thread behind the second thread guide back into the traversing range of the coil.

The connection between the first and the second yarn guide can be mechanical. But it is also conceivable and within the meaning of the invention to carry out this connection in that the common drive means consists of two individual drives, which are coordinated by means of a control, in the sense that they are synchronously movable.

In order to be able to perform the movement in the one direction independently and in the other direction together, there is a play-related connection between the common drive means and at least one of the thread guides Commitment. In an alternative embodiment, this may also be effected by a resilient connection.

In a particularly preferred embodiment, the drive means are designed pneumatically. Pneumatic actuators in the form of pneumatic cylinders are particularly suitable for linear movements. In addition, two pneumatic cylinders can be used well together for opposite directions by switching the respective inactive pneumatic cylinder pressure-free.

The catch element is preferably designed such that the thread is caught by a catch hook during a transverse movement in the direction in which the thread guides are driven together.

An increased catch safety is achieved by a safety groove in which the thread is additionally guided during stabilization and thus stabilized.

Also, the safety catch is achieved by a guide of the thread, which is substantially perpendicular to the axis of the winding spindle. Whether this is exactly 90 ° or an angle that differs slightly from the vertical, ultimately decides the structure and the kinematics of the winding machine and can be determined empirically.

Therefore, in an embodiment of the invention, an adjusting element is provided with which this angle is adjustable.

As an alternative to the catch element on the winding spindle and a catch element on the sleeve is possible.

An embodiment will be described in more detail below with reference to the accompanying drawings.

Fig. 1

die erfindungsgemäße Aufspulmaschine,

Fig. 2

die Vorderansicht der erfindungsgemäßen Aufspulmaschine aus Figur 1,

Fig. 3

die Bewegung der Fadenführer im Detail,

Fig. 4

ein weiteres Detail der Bewegung der Fadenführer,

Fig. 5

eine alternative Ausgestaltung des gemeinsamen Antriebsmittels der Fa- denführer.

They show:

Fig. 1

the winding machine according to the invention,

Fig. 2

the front view of the winding machine according to the invention FIG. 1 .

Fig. 3

the movement of the thread guides in detail,

Fig. 4

another detail of the movement of the thread guides,

Fig. 5

an alternative embodiment of the common drive means of the thread guides.

In FIG. 1 and FIG. 2 a winder according to the invention is shown. The frame 1 of the winding machine carries a rotatable Spulspindelträger 2, in which two winding spindles 3, 4 are rotatably mounted with their drives 5, 6. By rotation of the winding spindle carrier 2, the winding spindles 3, 4 can each be alternately pivoted into a change region 7 and into a winding region 8. Above the winding spindle 4 in the winding area, a pressure roller 9 is arranged. In the winding machine shown here, two threadlines are shown with two coils. This is representative of one or even a higher number of thread runs. The winding process takes place synchronously for all yarn paths. Although only one threadline is described in the following description, this also includes other existing threadlines.

From a system not shown here for producing and treating threads, the thread 10 is fed via a head thread guide 11. The winding process, which is known in principle from the state of the art, will be described below, as it has been described before FIG. 1 followed situation. The positions of the winding spindles, thread guides and the threadline therefore deviate from FIG. 1 from. The winding spindle 3 is still in the winding area 8 at this time. The tapered thread 10 is oscillated by the traversing device 12 within a traversing area 13 parallel to the axis of the winding winding spindle 4. Subsequently, the thread is guided over the rotatably mounted pressure roller 9 and wound on the spool 15, which is mounted on the winding spindle 3. The Winding spindle 4 is equipped with an empty sleeve 16 and is located in the change region 7.

At the moment in which the coil 15 has reached its final diameter, the winding spindle carrier 2 is rotated, so that the winding spindle 3 are moved into the changing region and the winding spindle 4 in the winding area and thus now the representation in FIG. 1 correspond. The direction of rotation of the winding spindle carrier 2 is chosen so that it corresponds to the direction of rotation of the winding spindles 3 and 4.

While the thread 10 continues to run onto the spool 15, the thread 10 is guided in the area of traversing by a thread guide, 17 by means of a thread guide drive means 20 out of the traversing area into the catching area 14. Below the winding spindle located in the winding spindle 4, the thread 10 is also guided by a yarn guide 18 by means of a yarn guide drive means 21 from the trawl 13 in the catch area 14, while another, provided below thread guide 19, the thread 10 before casserole on the coil 15 again into a certain portion of the traversing region 13, where the thread 10 forms a bead 23. Between the thread guides 17 and 18, a thread portion 10.1 is formed. The yarn guides 17 and 18 are arranged on parallel to the Spulspindelachse moving rods. In case of several thread runs, a corresponding number of thread guides are provided on the respective bar. The movement of the yarn guides 17 and 18 out of the traversing region 13 in the direction of the catching area 14 is effected by the drive means 20 and 21. By guiding the yarn in front of and behind the winding spindle 4 in the winding area, it is ensured that the yarn passes precisely beyond the catching element 24 is, and then returned by the common drive means 22 is uniform, the catch element 24 passes over and caught there. The speed of the thread 10 and the peripheral speed of the catch element 24 have the same sign and about the same amount. By the common drive means it is ensured that the thread in a closely defined angle, usually perpendicular to the Spulspindelachse, via the catch element 24 is guided. The thread 10 is now taken by the catch element 24 of the winding spindle 3 in the winding area 8 and wound onto the tensioned on the winding spindle 3 sleeves 16 to form coils. Immediately after catching the connection to the coil 15 is disconnected.

In FIGS. 3 and 4 the sequence of movement of the yarn guides 17 and 18 during the catching is described in detail. The view is the same as the view FIG. 1 , By the drive means 20 and 21, not shown here, the thread driver and thus guided by the yarn guides 17 and 18 thread section 10.1 along the winding spindle 3 and in this view behind the winding spindle 3 first in a first movement section 28 from the traversing region 13 in the direction of catching 14th guided, wherein the thread portion 10.1 is guided beyond the catch area. Subsequently, the yarn guides 17 and 18 are returned to a second movement section 29 by a common drive means 22 again in the direction traversing region 13. The catching takes place in this second movement section. In the second movement section 29, the drive means 22 acts together with the rods, on which the thread guides 17 and 18 are provided, that the thread section 10.1, guided over the thread guides 17 and 18, is guided over the catch element 24 in a tightly toleranced angle. As a result, the required high catch safety is achieved even at high yarn speeds. The connection between the common drive means 22 and the thread guides 17 and 18 takes place here by a one-sided acting form-fitting coupling in the form of a lot. As a result, the connection is subject to play. Other constructive embodiments, such as a fixed connection between the common drive means 22 and one of the yarn guides and a lot between the common drive means 22 and the other yarn guide are deducible for the skilled person and within the meaning of the invention. Same services as the lots also provide elastic elements such as feathers.

As a rule, the thread runs perpendicular to the winding spindle axis. By an adjusting element 27, this angle can be adjusted and optimized. The catch element 24 is constructed here from a catch groove 25 and a catch hook 26. In this case, the thread falls when driving over the side of the catch element 24 initially in the catch groove 25 and is then reliably caught by the fishing hook 26. However, there are also other structures of the catch element 24, in particular without catch groove 25 conceivable and within the meaning of the invention.

FIG. 5 shows a variant of the in the FIGS. 3 and 4 Here, the common drive means is realized by a common control, which coordinates the drives 20 and 21 and controls synchronously in the preferred case. A sequence of movements can now be such that the drives 20 and 21 are initially individually controlled in a first section of the movement. In the second section of the movement, the drives 20 and 21 are coordinated by the controller 30 so that the movement takes place synchronously. For this example, stepper motors can be used or position-controlled drives whose position is detected by a position measuring system and the controller 30 is reported back.

LIST OF REFERENCE NUMBERS

1

frame

2

Spulspindelträger

3

winding spindle

4

winding spindle

5

drive

6

drive

7

change region

8th

spooling

9

pressure roller

10

thread

10.1

section of thread

11

Yarn guide

12

Traversing device

13

Traversing range

14

capture area

15

Kitchen sink

16

shell

17

first thread guide

18

second thread guide

19

third thread guide

20

Drive means of the first thread guide

21

Drive means of the second thread guide

22

Common drive means

23

bead

24

catching element

25

retaining groove

26

hook

27

adjusting

28

First movement section

29

Second movement section

30

control

Claims (20)

1. Method for catching and winding an advancing yarn (10) on a tube (16) held by a rotating winding spindle (4), in which method the yarn is continuously drawn and taken up by a storage means (15) and in which method the yarn is guided into a catch element on the periphery of the winding spindle (4) or the winding tube by moving a guide means in the axial direction of the rotating winding spindle (4), the yarn (10) being caught by the catch element (24), said method being characterized in that a section (10.1) of the yarn (10) is formed between two yarn guides (17, 18) and that the section (10.1) of the yarn (10) is fed to the catch element (24) by the simultaneous movement of the yarn guides (17, 18), wherein the movement of the yarn guides (17, 18) is divided into two movement sections (28, 29), the yarn section (10.1) being guided in a first movement section (28) toward the catch element by two yarn guides (17, 18) being driven by separate drive means (20, 21) and the yarn section (10.1) cooperating with the catch element (24) in a second movement section (29), wherein the yarn guides (17, 18) are driven by a common drive means (22) in the second movement section (29), and that the yarn guides (17, 18) for guiding the yarn section are moved simultaneously at least in the second movement section (29) and wherein an inversion of direction is effected between the first (28) and the second (29) movement sections.
2. Method according to Claim 1 characterized in that the yarn guides (17, 18) for guiding the yarn section are moved simultaneously and at the same speed at least in the second movement section (29).
3. Method according to Claim 2 characterized in that the yarn guides (17, 18) for guiding the yarn section are moved simultaneously and at the same speed at least in the second movement section (29), the yarn section (10.1) running substantially orthogonally to the axis of rotation of the rotating winding spindle (4).
4. Method according to one of the preceding claims characterized in that the yarn guides (17, 18) for guiding the yarn section (10.1) are partly moved one after the other in the first movement section.
5. Method according to one of the preceding claims characterized in that the yarn guides (17, 18) for guiding the yarn are partly moved independently of each other in the first movement section.
6. Method according to one of the preceding claims characterized in that the running direction of the yarn (10) and the peripheral speed of the catch element (24) are parallel at the point of yarn contact.
7. Method according to one of the preceding claims characterized in that the yarn (10) is drawn continuously and taken up by a bobbin (15) clamped on a second rotating winding spindle (3).
8. Method according to Claim 7 characterized in that the yarn (10) is guided by a stationarily held third yarn guide (19) before the yarn accumulates on the bobbin (15).
9. Winding machine for continuously winding up yarns (10) that are each assigned to a winding station into bobbins (15), which winding machine comprises a traversing device (12) for traversing the yarns (10), which are to be wound up, in the axial direction of the bobbin within a traversing range (13), a rotatably mounted spindle support (2), a plurality of winding spindles (3, 4) rotatably mounted on the spindle support (2) for receiving the bobbins, the winding spindles (3, 4) being guided alternately by rotating the spindle support (2) into a winding range for winding the yarns (10) and into a doffing range (7) for removing the completely wound bobbins (15), catch elements (24), which are disposed at each winding station and are connected to the winding spindle (3, 4) and are used for locking the yarn into position, a first yarn guide (17) for each winding station, which first yarn guide (17) can be displaced in the axial direction of the winding spindle and is disposed before the winding spindle (4) located in the winding range within the range of the traversing device (12) in the running direction of the yarn, and a second yarn guide (18) for each winding station, which second yarn guide can be displaced in the axial direction of the winding spindle and is disposed behind the winding spindle (4) located in the winding range (8) and before the winding spindle (3) located in the doffing range (7) in the running direction of the yarn, said winding machine being characterized in that a drive means (22) is provided, which jointly displaces the first (17) and the second yarn guides (18), and that the yarn guides are interconnected during said displacement, wherein the first (17) and the second yarn guide (18) can be displaced in a doffing direction out of the traversing stroke and in an opposite winding direction into the traversing stroke and that the yarn guides (17, 18) are driven in the doffing direction by separate drive means (20, 21) and in the winding direction by the common drive means (22).
10. Winding machine according to Claim 9 characterized in that a third yarn guide (19) is provided for each winding station, which third yarn guide is disposed between the second yarn guide (18) and the winding spindle (3) located in the doffing range (7) in the running direction of the yarn as well as within a traversing range (13) defined by the stroke of the traversing device when seen in the axial direction of the winding spindle.
11. Winding machine according to Claim 9 or 10 characterized in that the connection between the first (17) and the second yarn guide (18) during their joint displacement by the common drive means (22) is a mechanical connection.
12. Winding machine according to Claim 9 or 10 characterized in that the connection between the first (17) and the second yarn guide (18) during their joint displacement by the common drive means (22) is effected by the coordination of the both drive means (20, 21).
13. Winding machine according to Claim 9 characterized in that the common drive means (22) and at least one of the yarn guides (17, 18) are interconnected with play.
14. Winding machine according to Claim 9 characterized in that the connection between the common drive means (22) and at least one of the yarn guides (17, 18) is flexible.
15. Winding machine according to one of the Claims 9 to 14 characterized in that the drive means (20, 21, 22) work pneumatically.
16. Winding machine according to one of the Claims 9 to 15 characterized in that the catch element (24) comprises a catch hook (26), which is oriented away from the traversing range (13) and which cooperates with the yarn (10) in such a way that the catch hook (26) catches the yarn (10) when the yarn section (10.1) is displaced toward the traversing range (13).
17. Winding machine according to one of the Claims 9 to 15 characterized in that the catch element (24) comprises a catch groove (25), extending tangentially around the winding spindle (3, 4).
18. Winding machine according to one of the Claims 9 to 17 characterized in that the first (17) and the second yarn guide (18) are disposed in such a way relative to each other that the yarn (10) runs substantially perpendicularly to the axis of the winding spindle (4) during the catching operation between said yarn guides.
19. Winding machine according to Claim 18 characterized in that an adjusting element (27) is provided using which the angle between the yarn (10) and the axis of the winding spindle (4) can be adjusted.
20. Winding machine according to one of the Claims 9 to 15, 18, 19 characterized in that the catch element is attached on the tube.

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