EP1046603A2 - Device for and method of guiding and cutting a supplied yarn during bobbin exchange - Google Patents

Abstract

A bobbin changing arrangement on a winder has a suction nozzle (37) placed behind the driven bobbin (13) and a guide groove on the surface drive roll (29) or on the bobbin (13). At changeover the yarn runs into the suction nozzle (37) and the traverse guide (6) places it between the surface drive roll (29) and the bobbin (13) in the guide groove (48). Independent claims are included for the following: (a) a bobbin changing process where the yarn is placed in the suction nozzle and cut, then allowed to run through the guide groove (48) till the new bobbin has accelerated sufficiently to commence winding; (b) a false twist texturing machine with a bobbin winding arrangement incorporating a guide groove (48) in the surface driv roll (29).

Description

The invention relates to a device for guiding, cutting and winding of a continuously running thread when changing the bobbin in one Winding device according to the preamble of claim 1 and a Process for guiding and cutting a continuously running thread according to the preamble of claim 11.

The device and the method are known from EP 0 311 827.

In textile machines, for example, a crimped thread is continuously closed a coil wound. After the bobbin has finished winding, a Reel change. For this it is necessary that the thread is cut first is so that the full bobbin with loose thread end against a new empty tube can be changed. The thread end of the continuously tapering thread during the change by means of a pneumatic suction device recorded and discharged. After the bobbin has been changed, the Thread caught by a catcher and on the new tube wrapped up.

In the device known from EP 0 311 827 and in the known The thread is moved by means of a movable thread guide according to the Completion of the bobbin outside of the bobbin area to a side next to the Exhaust device arranged winding area. After the The bobbin has been changed and the new tube is ready to be caught Thread guide pivoted back into the winding area. For handover or The thread is caught by means of a transfer device between the Suction device and the thread guide deflected and the catching device for Catch offered.

The known device and the known method have the disadvantage that at the end of the winding cycle, the loose thread end on the finished bobbin is undefined, which is particularly important when it comes to further processing of the loose thread end difficult.

Furthermore, the deflection of the thread leads through the transfer device to catch the thread in significant wraps in relation to the Winding tension leads to greater fluctuations in tensile force in the thread. Such fluctuations in tensile force can occur with upstream conveying elements lead to a winder formation.

It is an object of the invention, an apparatus and a method of the beginning to create the type mentioned in such a way that during the bobbin change when guiding and catching the thread and one when possible when winding the thread gentle thread guidance with low thread deflection is guaranteed.

Another object of the invention is to cut after the thread ensure that the loose thread end on a binding bead of the full bobbin is present, and that the running thread to a new one without substantial folding Sleeve is applied.

This object is achieved by a device with the features according to claim 1 and by a method with the features according to Claim 11 solved.

The invention is characterized in that the thread guide and Suction device at the beginning of the bobbin change within the bobbin area are arranged. The winding area is the area on the tube that of the covered thread is covered. This allows the thread to be relatively low Deflection cut and taken over by the thread suction, so that there are no significant fluctuations in thread tension during the change phase occur. The suction device is preferably arranged stationary. At one designed to be movable essentially parallel to the coil Suction device there is the possibility of the loose thread end with the The binding bead is closed at any position within the winding area place.

To ensure that when changing the coil against the new sleeve of Thread can be safely removed from the suction device, the Driving roller or the necks on the circumference a thread guide groove before the new sleeve for drive is brought into peripheral contact with the drive roller, the thread is guided by the thread guide, the thread guide groove and the Suction device guided. This prevents the suction device running thread between the surfaces of a new sleeve and the drive roller is clamped and braked by the sleeve as long as it is not yours has reached predetermined speed. The thread can be folded up without folding transferred from the full spool to a new tube. Through the thread receiving suction device is an undisturbed thread run in the Winding device upstream devices in the change phase guaranteed. The thread guide groove can be on the circumference of the drive roller or be formed radially circumferential on the circumference of the sleeve, so that the thread is safely guided without jamming while the sleeve is accelerating.

In a particularly advantageous development of the device Thread guide groove of the drive roller in the section of the circumference of the Drive roller or the sleeve formed, which is contacted by the wound coil becomes. This allows the deflections and deflections of the thread during the alternating phase and thus minimize the thread tension fluctuations.

When the thread guide groove is formed in the necks, the thread guide groove is advantageously placed in the area of the sleeve by the spooled thread is overwrapped.

In a particularly preferred embodiment of the invention Thread guide groove executed with a groove depth T, which is at least larger than that Thread diameter. Here, the thread guide groove has a groove width B that is much larger than the groove depth. Through this relatively flat with a large width executed thread guide groove ensures that the thread does not come out of the Guide groove emerges due to its own dynamics. When the unwound sleeve on the drive roller is a free thread run through the Thread guide groove guaranteed. The small groove depth and the large groove width also cause the thread guide groove on the circumference of the drive roller or Scope of the sleeve during the winding trip the coil structure of the coil in not significantly affected.

In a further advantageous development of the invention, the Thread guide groove formed such that the groove depth T is greater than that Groove width B. This narrow thread guide groove ensures that the thread is held securely in the Thread guide groove held, and also the bobbin build remains during the Unwrapped travel. So that the thread gets into the narrow groove, the Traversing thread guide the thread slowly with reduced Guide the traversing speed over the groove.

In a further advantageous development of the invention, several are narrow Grooves arranged closely adjacent. The thread does not have to be positioned exactly and still get safely into one of the narrow grooves. Since the Coil structure is determined by a cross winding, even with several Thread guide grooves next to each other do not interfere with the structure of the bobbin.

In a particularly advantageous development of the device Cutting device, the thread guide, the thread guide groove on the circumference of the Driving roller and the suction device arranged in a transfer plane. In order to the thread can first be placed on the full bobbin as a binding wrap and Hand over to the suction device without any major deflection. Furthermore can in a simple pivoting movement of a transfer device of the thread the cutting device of the suction device are introduced. Here is only a deflection in the transfer level is required. The gripper arm of the Transfer device detects the thread in the thread path between the already lifted bobbin and the thread guide. This training also has the advantage that when lifting the bobbin from the drive roller of the thread through the Transfer device remains securely guided in the thread guide. The The transfer plane is preferably designed as the normal plane of the coil and contains the binding coil of the coil. In this normal plane is on the Driving roller provided the thread guide groove. However, it is also possible that Form the thread guide groove at an angle to the axis of the drive roller. This gives the Thread a wobble motion that turns into one when the binding wrap is wrapped leads to improved cohesion of the thread layers.

In the previously described processes for changing bobbins, catching and for winding the thread there is a possibility that the thread at the beginning of the Bobbin change by means of an auxiliary device from a traversing thread guide guided and then taken over by the thread guide of the auxiliary device becomes. The thread guide is preferably designed with a drive that the thread guide in the longitudinal direction parallel to the sleeve and the movement of the thread guide regardless of direction with variable speed executes. In this case, the drive could be a linear drive, for example be executed.

In a particularly advantageous development of the invention, the function the thread guide of an auxiliary device from a traversing thread guide Traversing device taken over and executed. For this, the Traversing thread guide the thread outside and inside the winding area Run lengthways parallel to the sleeve. This version has the advantage that no additional auxiliary device and its control are required. All Operations during winding, during bobbin change and during of the catch are via the control device of the traversing device controlled.

After the thread has been caught and wound on the tube, the actual winding travel, i.e. winding the spool. After the coil is completed, the thread from the Suction device taken over. To this end, the thread leading remains Traversing thread guide stand on a transfer level. First, on the Full coil wound a binding bead, the full coil already from the Driving roller is lifted .. The transfer device then leads the thread in the suction device. Now that the bobbin is changed and the Empty sleeve in the bobbin holder between the clamping plates begins the threading. Before the new sleeve is placed on the drive roller, the traversing thread guide and the thread guide groove of the drive roller guide the Thread between the sleeve and the drive roller. The sleeve is on the drive roller attached and accelerated to a speed required for the application. After the speed is reached, the drive of the traversing thread guide activated, and the traversing thread guide leads the thread into a catch position, in which the thread runs obliquely over a catching plane of the catching device, for example an end edge of the clamping plate.

The inventive method is particularly characterized by fast and precise bobbin changes. In particular by guiding the thread in front of and behind the catching device, the thread can be positioned very precisely, so that the thread is secure and without significant slack during the Spool change performed and caught by the safety gear.

The particularly advantageous method variant according to claim 12 leaves a large one Design freedom for the safety gear too. It can also make unnecessary Thread wraps can be avoided.

The use of the device according to the invention in a False twist texturing machine is particularly advantageous because False twist texturing machine via a variety of winding devices have one without manual operation after each wound coil Change the bobbin. One with the device according to the invention equipped false twist texturing machine already has the previously described advantages.

Further advantageous developments of the invention are in the subclaims Are defined.

The device according to the invention and the method are based on some Embodiments below with reference to the accompanying Drawings described in more detail.

Fig. 1

schematisch ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung beim Spulenwechsel;

Fig. 2

schematisch die Vorrichtung aus Fig. 1 beim Fangen des Fadens;

Fig. 3 und Fig. 4

schematisch weitere Ausführungsbeispiele der Fadenführungsnut.

They represent:

Fig. 1

schematically an embodiment of a device according to the invention when changing the bobbin;

Fig. 2

schematically the device of Figure 1 when catching the thread.

3 and 4

schematically further embodiments of the thread guide groove.

1 and 2 show a first exemplary embodiment of an inventive device Device shown within a take-up device, such as can be used in a texturing machine. The following description therefore applies to FIGS. 1 and 2, unless stated otherwise.

The winder has a pivotable spool holder 26 which a pivot axis 40 is located. The pivot axis 40 is at one Machine frame 41 attached. At the free ends of the fork-shaped Coil holder 26, two opposing clamping plates 27 and 28 are rotatable lay. Between the clamping plates 27 and 28 is a sleeve 13 for receiving a coil tensioned. For this purpose, the clamping plates 27 and 28 each have one conical centering projection that partially protrudes into the sleeve end. In order to the sleeve 13 is centered between the clamping plates 27 and 28. On the surface the sleeve 13 is a drive roller 29. At the periphery of the drive roller 29 is one radially circumferential thread guide groove 48 introduced. The thread guide groove 48 has a shallow groove depth, which is essentially the inclusion of a running one Fadens enables without jamming between when the empty tube is in contact the surfaces of the drive roller 29 and the empty tube occurs. The drive roller 29 is attached to a drive shaft 31. The drive shaft 31 is at one end coupled to the roller motor 30. The roller motor 30 drives the drive roller 29 at a substantially constant speed. Now about friction the sleeve 13 driven by the drive roller 29 to a winding speed, so that the thread 1 is wound on the sleeve 13 to form a bobbin. This is before the Driving roller 29 a traversing thread guide 6 arranged in the thread path. The Traversing thread guide is coupled to a traversing drive, which the Traversing thread guide 6 drives oscillating within the winding area.

In this embodiment, the thread 1 for changing the bobbin Catch and led to the winding by the traverse guide 6.

The traversing device 22 is constructed as a so-called belt traverse. Here, a traversing thread guide 6 is attached to an endless belt 33. The Belt 33 is parallel to the sleeve 13 between two deflection rollers 34.1 and 34.2 guided. In the belt plane there is a drive roller partially wrapped around the belt 35 arranged parallel to the deflection rollers 34.1 and 34.2. The drive roller 35 is attached to a drive shaft 44 of an electric motor 36. The electric motor 36 drives the drive roller 35 oscillating, so that the traversing thread guide 6 in the area between the deflection rollers 34.1 and 34.2 is moved back and forth. The electric motor can be controlled via the control device 8.

On the side opposite to the traversing to the sleeve 13 or Drive roller 29, the suction device 37 is arranged. The suction device 37 here consists of a cutting device 38 and a suction connection 39. The suction port 39 is here between the cutting device 38 and the sleeve 13 arranged. The suction port 39 has a slot-shaped Suction opening 46, which is aligned with a knife 47 of the cutting device 38 is arranged.

In Figures 1 and 2, the winding device is different Operating situations shown. In Fig. 1, the winder is at the end of one Spool trip shown. After the coil 24 is finished, the Traversing thread guide 6 positioned in a transfer plane. In this The traversing thread guide 6 remains on the transfer plane a binding wrap 23 is produced. At the same time, the coil holder 26 with the Coil 24 pivoted out of the operating position. Now one becomes the side Coil area arranged transfer device 42 activated. The Transfer device 42 has a gripping arm 43 which has a free end Penetration level penetrates. The gripping arm 43 is on a pivot axis 25 rotatably mounted and is parallel to a drive, not shown here Transfer level moved. The gripping arm 43 is dimensioned such that the free End of the gripper arm 43 between the thread guide 18 and the bobbin 24 grasps and the thread 1 in the transfer plane to the suction device 37 leads. The suction device 37 lies within the through the free end of the gripping arm 43 described trajectory. This ensures that the Thread 1 into the cutting device 38 and through the knife 47 is cut. Shortly before or at the same time, the thread 1 enters the slot-shaped suction opening 46 of the suction connection 39. The thread end of the thread is sucked off immediately after cutting. The loose end of the thread is placed on the bobbin in the area of the binding reel. At the same time, the thread enters the thread guide groove 48 of the drive roller 29. Now the coil 24 can be replaced by an empty sleeve. after the Coil 24 has been replaced by a sleeve, the process of applying begins. The Transfer device 42 is in her after cutting the thread 1 Starting position moved back.

The beginning of the application process is shown in FIG. The continuously fed thread is from the suction device 37, the thread guide groove 48 and the traversing thread guide 6. Because of the clarity, Fig. 2 dispenses with the representation of the transfer device. This is the Thread end sucked into a suction opening of the suction port 39. Once the Thread 1 through the traversing thread guide 6 and the thread guide groove 48 inside the contact area between the sleeve 13 and the drive roller 29 is guided, the sleeve 13 is brought into circumferential contact with the drive roller 29. The sleeve 13 is by the circumferential drive roller 29 on a by the Driving roller predetermined spool speed driven. After the sleeve 13 the Has reached spool speed, the electric motor 36 is controlled by the control device 8 controlled such that the electric motor the traversing thread guide 6 in a Bring position. The thread 1 slides out of the thread guide groove 48 and crosses now the catch level of the catch device 14 so that it is from the catch groove 21st is caught. The thread 1 is caught with the catch groove 21 and with an in the catcher or the clamping plate 27 integrated knife cut. On Such clamping plate is known for example from EP 0 403 949. So far reference is made to the publication mentioned.

After catching, the traversing thread guide 6 becomes from the catching position Led winding area. Here, the thread 1 on the sleeve 13 outside the Winding area wound to a thread reserve winding. The formation of the Thread reserve winding could in this case be caused by one that remains in one position Traversing thread guide 6 take place. Then the thread reserve winding has one Number of parallel windings on the traversing thread guide 6 can also at a speed determined by the electric motor 36 Be wound area, so that adjacent turns in the Thread reserve winding are generated. As soon as the thread guide reaches the winding area reached, the winding trip begins. The traversing thread guide 6 is then inside of the winding area is oscillatingly driven by the traversing device 22. The growing coil diameter of the coil 24 follows the pivot position of the For this purpose, the coil holder 26. The coil holder 26 has force transmitters that, on the one hand a contact pressure required to drive the coil between the coil 24 and the drive roller 29 and on the other hand a pivotal movement of the Enable bobbin holder 26 for changing bobbins.

The embodiment of the invention shown in FIGS. 1 and 2 is not limited to that the thread during the change process by the Traversing thread guide is guided. When using a different kind Traversing device, for example, by a reverse thread shaft is driven, a separately driven auxiliary thread guide can be used. For this purpose, the thread guide between the traversing thread guide and the sleeve arranged movably. The thread guide can be driven in one by a drive back and forth parallel plane to the sleeve 13 so that the thread on End of the winding trip can be taken from the traverse guide. Then the thread guide is guided into the transfer level, so that the Spool change - as described above - begins. The drive of the thread guide is also via the control device shown in Figures 1 and 2 controllable.

The rest of the procedure is identical to the previous description, the Traversing thread guide is replaced by the thread guide. After catching and the thread is passed back to the traversing thread guide.

In Fig. 3 and Fig. 4 are further embodiments of the thread guide groove shown schematically. 3 and 4, a drive roller 29 with a adjacent sleeve 13. The sleeve 13 is between the clamping plates 27 and 28 clamped. The clamping plates 27 and 28 are pivotable Coil holder (not shown here) connected. The circumference of the sleeve 13th adjacent drive roller 29 is over the roller motor 30 with a predetermined winding speed driven. So that is the extent the drive roller 29 adjacent sleeve 13 first accelerated until the desired Speed is reached.

3, the sleeve 13 has a circumference in the central region Thread guide groove 48 on The thread guide groove 48 has a groove depth T and a groove width B. The groove depth T is slightly larger than the thread diameter, see above that one, in the thread guide groove 48 between the sleeve 13 and the drive roller 29, guided thread is guided without clamping. The thread guide groove 48 has a significantly larger groove width B in relation to the groove depth T. The groove flanks are preferably flat, so that there is a very wide Thread guide groove with shallow depth results. This configuration of the Thread guide groove, which can also be introduced on the circumference of the drive roller could, the bobbin structure is very little affected when winding the thread.

In the exemplary embodiment shown in FIG. 4, 29 are in the drive roller a plurality of thread guide grooves 48 formed parallel to each other. The thread guide grooves 48 have a small groove width B and one relatively large groove depth T. This results in a very narrow one Thread guide groove in which the groove width B is larger than the groove depth T. Due to the very narrow thread guide groove, the bobbin structure remains unaffected. The arrangement of several thread guide grooves ensures that that despite the very small groove width of the thread quickly and safely into one of the grooves is introduced.

Reference list

1

thread

2nd

Deflection device

3rd

Deflection thread guide

4th

drive

5

Leading edge

6

Traversing thread guide

8th

Control device

13

Sleeve

14

Safety gear

18th

Thread guide

19th

drive

21

Catch groove

22

Traversing device

23

Tying wrapping

24th

Kitchen sink

25th

Swivel axis

26

Spool holder

27

Clamping plate

28

Clamping plate

29

Drive roller

30th

Roller motor

31

drive shaft

33

belt

34

Pulley

35

Drive roller

36

Electric motor

37

Suction device

38

Cutting device

39

Suction connection

40

Swivel axis

41

Machine frame

42

Transfer device

43

Gripper arm

44

drive shaft

45

Cutting device

46

Suction opening

47

knife

48

Thread guide groove

Claims (16)

Device for guiding, cutting and winding a continuously incoming thread (1) when changing the bobbin in one Winding device, in which the thread (1) on a through Driving roller (29) driven sleeve (13) wound into a coil (24) is, with a movable thread guide (6), which is by a drive (36) is movable essentially parallel to the sleeve (13), with a Thread run following the thread guide (6) suction device (37), which a pneumatic suction connection (39) and a Has cutting device (38), and one with the suction device (37) cooperating transfer device (42), which the leading thread leads to transfer to the suction device (37), the thread (1) when changing the bobbin, when catching in a Catching device (14) and when winding on a new sleeve (13) the thread guide (6) is guided and the incoming thread after Cut and until the thread is caught by the suction device (37) is taken up and discharged, characterized in that the Thread guide (6) in the thread run in front of the driven sleeve (13) and the Suction device (37) arranged behind the driven sleeve (13) are that a thread guide groove (48) radially on the circumference of the drive roller (29) or is formed radially on the circumference of the sleeve (13) and that the thread after the takeover by the suction device (37) by means of the Thread guide within the contact area between the new sleeve (13) and the drive roller (29) can be guided in the thread guide groove (48). Apparatus according to claim 1, characterized in that the Thread guide groove (48) is formed in a region of the drive roller (29), which is contacted by the wound coil. Apparatus according to claim 1, characterized in that the Thread guide groove (48) is formed in a region of the sleeve (13) that is wound over by the wound thread. Device according to one of claims 1 to 3, characterized in that that the thread guide groove (48) has a groove depth (T) which is greater than the thread diameter and the one with the groove width (B) in the ratio B / T > 1 stands. Device according to one of claims 1 to 3, characterized in that that the thread guide groove (48) has a groove depth (T) that is essential is larger than the thread diameter and that with the groove width (B) in the Ratio B / T <1 stands. Device according to claim 5, characterized in that several parallel guide grooves (48) on the circumference of the Driving roller (29) are formed. Device according to one of claims 1 to 6, characterized in that that for cutting by the cutting device (38) and for applying the new sleeve (13) to the drive roller (29) of the thread guide, the Thread guide groove (48) and the suction device (37) in one Transfer level are arranged. Apparatus according to claim 7, characterized in that the Transfer device (42) is movable parallel to the transfer plane Gripping arm (43), which has a free end in the thread path between the thread guide and the bobbin (24) lifted from the drive roller (29) is pivotable, and that the suction device (37) within Radius of movement of the free end of the gripping arm (43) is arranged. Device according to one of claims 1 to 8, characterized in that that the thread guide as a traversing thread guide (6) one Traversing device (22) is executed, which traversing thread guide (6) the thread (1) outside and inside the winding area in the longitudinal direction leads parallel to the sleeve (13) and that the traversing thread guide (6) a variable speed drive (36) can be driven regardless of direction. Apparatus according to claim 9, characterized in that the Traversing thread guide (6) after winding the thread (1) into one Spool (full spool) in the transfer level always within the spool area is movable that the sleeve (13) with the full coil by means of a pivotable bobbin holder (26) is pivotable from the operating position and that the transfer device (42) is movable in such a way that the thread (1) between the full bobbin (24) and the traversing thread guide (6), into the thread guide groove (48) and to the suction device for Cutting and applying is feasible. Process for guiding and cutting a continuously tapered Fadens when changing the bobbin in a winding device, the Thread on a sleeve driven by a drive roller to a bobbin in which the thread is used to change the bobbin, to catch in a catching device and for winding on a new sleeve a movable thread guide substantially parallel to the bobbin axis is guided, in which the thread for cutting by means of a Transfer device is guided to a suction device and at which the incoming thread after cutting and up to catching the thread is picked up and removed by the suction device, characterized in that after winding the thread into a Spool (full spool) of the thread guide in a transfer level within the Spooling is moved to form a binding that the Sleeve with the full spool is moved away from the drive roller that the thread between the thread guide and the full bobbin through the parallel to the Transfer plane movable transfer device detected and in a Thread guide groove is inserted between the drive roller and the sleeve and for cutting and accepting those in the transfer plane lying suction device is supplied that after the takeover of the Thread through the suction device of the thread by the thread guide long in the thread guide groove until the new sleeve on a Peripheral speed is accelerated. A method according to claim 11, characterized in that for catching the Thread the thread guide with the thread in a catch position outside the Spooling area is guided so that the thread from the thread guide groove slides and crosses a catching plane of the catching device. False twist texturing machine with at least one winding device, at which is a textured thread (1) on a by a drive roller (29) driven sleeve (13) to a coil (24), and with a device for guiding and cutting the thread (1) in one Reel change, characterized in that the drive roller (29) on Circumference within a contact area with the sleeve Has thread guide groove (48). False twist texturing machine according to claim 12, characterized in that that the thread guide groove (48) of the drive roller (29) in the area of Drive roller (29) is formed, which contacts the wound coil becomes. False twist texturing machine according to claim 12 or 13, characterized characterized in that the thread guide groove (48) of the drive roller (29) a Has groove depth (T), which is greater than the thread diameter and with the groove width (B) is in the ratio B / T> 1. False twist texturing machine according to claim 12 or 13, characterized characterized in that the thread guide groove (48) of the drive roller (29) a Has groove depth (T), which is greater than the thread diameter and with the groove width (B) is in the ratio B / T ≤ 1.

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