EP3526148B1 - Take-up winding device - Google Patents

Description

Winding device for continuously winding up a multifilament fiber strand according to the preamble of claim 1.

A winder of the generic type for continuously winding a multifilament fiber strand is known from the DE 102 35 209 A1 known.

In the known winding device, two winding spindles arranged on a rotatably mounted winding turret are used alternately in order to continuously wind up a thread into bobbins. Here, the winding spindles on the winding turret are alternately guided in an operating area for winding a bobbin and in a changing area for removing the bobbin. When changing the position of the winding spindles, the incoming thread from the finished bobbin must be transferred between the winding spindles for winding on a new bobbin. For this purpose, each of the winding spindles has a clamping device at a freely projecting front end, by means of which the thread is fixed after being caught. The clamping device has a clamping gap in order to fix the thread. The clamping device is assigned a catch bushing which has a catch slot that interacts with the clamping gap. Thus, a thread guided at the front end of the winding spindle can be caught through the catching slot and transferred into the clamping gap. Here, after the clamping device has been fixed, the thread is torn by building up further tensile stresses.

Through the WO 2009/024999 A1 is a winding device for the continuous winding of a multifilament fiber strand with two drivable winding spindles and with a rotatably mounted winding turret for holding the cantilevered winding spindles, whereby the winding spindles can be guided through the winding turret alternately in an operating area for winding a bobbin and a changing area for removing the bobbin and where each of the winding spindles has a clamping device at its protruding end for catching the fiber strand, the clamping device having a clamping block firmly connected to the winding spindle and a movable clamping plate which are elastically clamped together to form a circumferential clamping slot, known.

When winding multifilament fiber strands, which are formed from a large number of individual fibers, there is the problem that, on the one hand, not all fibers of the fiber strand are captured during catching and clamping and, on the other hand, the fibers are torn at different points when they are cut. Fibers not fixed in the clamping device lead to undesired winding formations on the winding spindle or on the clamping device and lead to a process interruption. This problem increases as the total titre of the fiber strand increases, so that incorrect changes are unavoidable.

It is now the object of the invention to provide a winder of the generic type for continuously winding a multifilament fiber strand, with which especially thick fiber strands, in particular harvest twine, can be continuously wound into bobbins.

Another aim of the invention is to provide a winder of the generic type for the continuous winding of a multifilament fiber strand, in which a thread transfer between two winding spindles is possible with a relatively simple thread guide.

According to the invention, this object is achieved in that the clamping device has a clamping block firmly connected to the winding spindle and a movable clamping plate which are elastically clamped together to form a circumferential clamping slot.

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

The invention has the particular advantage that the incoming fiber strand can dip directly into the circumferential clamping slot. Catching with a catch notch is not required. Due to the surrounding clamping slot on the circumference of the winding spindle, the running thread can be inserted directly into the clamping slot and grasped there. Secure fixation is possible regardless of the titer of the fiber strand. For this purpose, the clamping plate is elastically clamped to the clamping block.

So that a reproducible clamping force can be generated in the clamping slot, it is provided that the clamping plate and the clamping block are braced against one another by a compression spring.

So that a quick and safe severing of the fiber strand after fixation is possible even with very large yarn counts, the development of the invention is preferably used in which the clamping device at the end of the winding spindle cooperates with an auxiliary device which has a cutting device with a rotating cutting means. In this way, all fibers of the fiber strand can be cut through quickly and without fraying.

For this purpose, the cutting device has a cutting drive for driving the cutting means.

In order to be able to execute the thread guide during the thread transfer from a finished bobbin to the receiving bobbin spindle, the development of the invention is preferably carried out in which the auxiliary device has two freely rotatable rollers which are assigned to the cutting device and which are held on a movable carrier are, wherein the carrier reciprocates the rollers between a rest position and a catching position. Thus, on the running thread, a piece of thread stretched between the two rotatable rollers is guided through the auxiliary device into the clamping slot.

In order to optionally combine the thread guide and the cutting device with each of the clamping devices on the winding spindles, provision is also made for the auxiliary device to be arranged on a machine frame next to the bobbin turret. The auxiliary device can thus be fed alternately to both clamping devices.

When the completely wound bobbins are removed, the beginning of the fiber strand fixed in the clamping device must be pulled out of the clamping slot. In order not to influence the wound position of the bobbin, the clamping plate of the clamping device is coupled to a thrust device inside the winding spindle, by means of which the clamping plate can be displaced against the bias to open the clamping slot. This makes it possible to release the fixed section of the fiber strand before the bobbin is removed.

The thrust device is formed by a piston in a pressure chamber, which piston is supported on the clamping block via the compression spring and which pressure chamber can be acted upon by a pressure fluid acting on the piston to move the clamping plate and open the clamping slot. Thus, shortly before the finished bobbin is removed from the winding spindle, the clamping slot can be released.

For safe guidance, the clamping plate has a guide shaft at one end of the clamping block, the clamping slot at the end of the clamping block being formed between a plate collar of the clamping plate of an end face of the clamping block and the guide shaft being directly connected to the pushing device or the piston of the pushing device.

In order to facilitate the immersion of the fiber strand into the clamping slot, provision is also made for the clamping slot to be assigned a plurality of transverse grooves which are evenly distributed on the circumference and which are partially arranged extend in the terminal block and partially in the clamping plate. This promotes the immersion of the fibers of the fiber strand in the clamping slot.

Since each winding spindle alternately winds the fiber strand into a bobbin, the clamping devices at the ends of the winding spindles are constructed identically.

The winding machine according to the invention is particularly suitable for winding fiber strands with a total denier of up to 90,000 dtex. to wind up. Such fiber strands are preferably used as harvest binding twine. The fibers of the fiber strand can be produced as ribbons or as monofilaments from a synthetic polymer. In this respect, the winding device according to the invention is particularly suitable for winding up the fiber strand produced at the end of an extrusion process.

An embodiment of the winding device according to the invention is explained in more detail below with reference to the accompanying figures.

Fig. 1

schematisch eine Vorderansicht eines Ausführungsbeispiels der erfindungsgemäßen Aufspulvorrichtung

Fig. 2

schematisch eine Seitenansicht des Ausführungsbeispiels aus Fig. 1

Fig. 3.1

schematisch eine Querschnittsansicht einer Klemmeinrichtung des Ausführungsbeispiels aus Fig. 1

Fig. 3.2

schematisch eine Draufsicht der Klemmeinrichtung aus Fig. 3.1

Fig. 4.1

schematisch eine Vorderansicht des Ausführungsbeispiels aus Fig. 1 bei einem Spindelwechsel

Fig. 4.2

schematisch eine Vorderansicht des Ausführungsbeispiels aus Fig. 1 bei einer Fadenübergabe

They represent:

Fig. 1

schematically a front view of an embodiment of the winding device according to the invention

Fig. 2

schematically a side view of the embodiment from Fig. 1

Fig. 3.1

schematically shows a cross-sectional view of a clamping device of the embodiment Fig. 1

3.2

schematically shows a plan view of the clamping device Fig. 3.1

Fig. 4.1

schematically a front view of the embodiment from Fig. 1 when changing the spindle

Fig. 4.2

schematically a front view of the embodiment from Fig. 1 at a thread transfer

In the Fig. 1 and 2 an embodiment of the winding device according to the invention is shown in several views. Fig. 1 shows the embodiment in a front view and in Fig. 2 the embodiment is shown in a side view. Insofar as no express reference is made to one of the figures, the following description applies to both figures.

A rotatably mounted winding turret 2 is arranged in a machine frame 1. Two projecting winding spindles 3.1 and 3.2 are arranged on the winding turret 2. The winding spindles 3.1 and 3.2 are held on the winding turret 2 offset from one another by 180 °.

As shown in Fig. 2 is apparent, each of the winding spindles 3.1 and 3.2 is assigned a spindle drive 30.1 and 30.2. The winding revolver 2 is controlled via a revolver drive 31.

From the representation in Fig. 1 it can also be seen that two deflection rods 5.1 and 5.2 are held between the winding spindles 3.1 and 3.2, which are offset by about 90 ° to the winding spindles 3.1 and 3.2.

A traversing device 6, which has a movable traversing means 7, is held on the machine frame 1 to the side of the winding turret 2. The traversing means 7 is guided back and forth parallel to the winding spindle 3.1 and 3.2 by the traversing device 6.

To guide a fiber strand 34, the traversing device 6 is assigned a dancer arm control unit 9, which has a movable dancer arm 9.1 and a dancer arm roller 9.2. The dancer arm control unit 9 is coupled to the spindle drives 30.1 and 30.2 in order to obtain the most constant possible winding speed when winding the fiber strand. The dancer arm roller 9.2 interacts with two stationary deflection rollers 8.1 and 8.2 which are held on the machine frame 1.

An auxiliary device 10 is arranged on the machine frame 1 below the traversing device 6. The auxiliary device 10 has a carrier 16 which is coupled to a lifting cylinder 15 and is movably held on the machine frame 1. Two guide rollers 11.1 and 11.2 are arranged on the carrier 16 at a distance from one another. The guide rollers 11.1 and 11.2 are held freely rotatable. A cutting device 12 is arranged on the carrier 16 between the guide rollers. The cutting device 12 contains a rotating cutting means 13 which is connected to a cutting drive 14.

The auxiliary device 10 cooperates with two clamping devices 4.1 and 4.2 arranged on the projecting ends of the winding spindle 3.1 and 3.2. The clamping devices 4.1 and 4.2 are in particular in the Fig. 2 shown. The clamping devices 4.1 and 4.2 at the front ends of the winding spindles 3.1 and 3.2 are identical. In this respect, im following with reference to the Fig. 3.1 and 3.2 only one of the clamping devices shown and described in more detail.

In the Fig. 3.1 and 3.2 the clamping device 4.1 is shown schematically in a cross-sectional view and in a plan view at the front end of the winding spindle 3.1. The Fig. 3.1 Figure 11 shows a cross-sectional view and 3.2 a top view of the clamping device 4.1.

As shown in Fig. 3.1 As can be seen, the clamping device 4.1 has a clamping block 19 which is firmly connected to the front end of the winding spindle 3.1. The clamping block 19 is attached to the end of a chuck 18 for this purpose.

A clamping plate 20 is movably arranged on one end face of the clamping block 19. The clamping plate 20 consists of a central guide shaft 22 and a circumferential plate collar 23 which is connected to the guide shaft 22. The plate collar 23 falls on the end face of the clamping block 19 and forms a clamping slot 24 together with the clamping block 19. The plate collar 23 is inclined relative to a vertical and forms a threading groove 32 with a bevel formed on the clamping block 19 Clamping slots 24 are formed circumferentially on the clamping device 4.1.

The clamping plate 20 is coupled to a pusher device 21 arranged inside the winding spindle 3.1. The thrust device 21 has a thrust piston 27 which is connected to the guide shaft 22 of the clamping plate 20 via a coupling member 28. The thrust piston 27 supports relative to the terminal block 19 inside the winding spindle 3.1 by a compression spring 26. To guide the thrust piston 27, the clamping block 19 has a guide bore 33 in the interior of the winding spindle, into which the thrust piston 27 projects with a guide end.

The thrust piston 27 is arranged in the interior of the winding spindle 3.1 in a pressure chamber 29. The pressure chamber 29 is coupled to the chuck 18 via an opening 36 in order to control a clamping device (not shown here) for a sleeve 17. For this purpose, the pressure chamber 29 can be subjected to compressed air.

As shown in 3.2 As can be seen, the clamping slot 24 has a plurality of transverse grooves 25 evenly distributed around the circumference. The transverse grooves 25 extend partly in the clamping block 19 and partly in the clamping plate 20. The transverse grooves 25 are designed to be limited in their depth and extent and facilitate the drawing-in of the fiber strand into the clamping slot 24.

To explain the winding device according to the invention, in addition to Fig. 1 Relation to the Fig. 4.1 and 4.2 taken. In the Fig. 4.1 and the Fig. 4.2 different operating situations are shown during a spindle change.

The Fig. 1 shows first of all the normal operation of the winding device when the fiber strand 34 is being wound up. The fiber strand 34 could be formed from a plurality of tapes or monofilaments in a preceding extrusion process. Here, the fiber strand can have a total denier up to 90,000 dtex. exhibit. The fiber strand 34 is continuously fed to the winding device and guided over the deflection roller 8.1, the dancer arm roller 9.2 and the deflection roller 8.2. From the deflecting roller 8.2 the thread runs through the traversing device 6 and is wound up on the driven winding spindle 3.1 to form a bobbin 35. In the traversing device 6, the fiber strand 34 is guided back and forth by the traversing means 7 within a traversing stroke, so that the bobbin 35 is wound with a cross winding.

As soon as the bobbin 35 on the winding spindle 3.1 has a desired bobbin diameter, the winding spindles 3.1 and 3.2 are changed to move the winding spindle 3.1 out of the operating area into the changing area and the winding spindle 3.2 from the changing area into the operating area. For this purpose, the winding turret 2 is activated via the turret drive 31. In the Fig. 4.1 the situation is shown in which the winding spindle 3.1 with the completely wound bobbin 35 is held in the changing area. In this phase the thread is guided through the deflection rod 5.1 and the traversing means 7 after it has run out of the full bobbin. To take over the thread by the clamping device 4.2 on the winding spindle 3.2, the traversing means 7 with the fiber strand 34 is guided into a catching plane in the area of the clamping slot 24 of the clamping device 4.2. The fiber strand is guided through the deflecting rod 5.1 in such a way that the fiber strand 34 does not fall off the circumference of the bobbin 35.

To take over the fiber strand 34 from the winding spindle 3.2, the auxiliary device 10 is then activated. The lifting cylinder 15 brings the carrier 16 with it the guide rollers 11.1 and 11.2 from a rest position into a catching position. This situation is in Fig. 4.2 shown.

In the catching position of the auxiliary device 10, the fiber strand 34 is guided on the circumference of the guide rollers 11.1 and 11.2. The section of the fiber strand 34 between the guide rollers 11.1 and 11.2 is fed to the clamping device 4.2, the fiber strand penetrating the insertion groove 32 and being drawn into the clamping slot 24. The drawing in of the fiber strand 34 into the clamping slot 24 is supported by the transverse grooves 25 in the area of the clamping slot 24.

As soon as the fiber strand 34 is gripped by the clamping slot 24 and is carried along with the rotation of the winding spindle 3.2, the thread section running off the clamping device 4.2 reaches the cutting device 12. In the cutting device 12, the fiber strand 34 is cut by the rotating cutting means 13. The cutting means can be formed here by a knife disk, which is driven, for example, by a pneumatically operated turbine or an electric motor. After cutting through the fiber strand 34, a new bobbin can be wound on the winding spindle 3.2. The auxiliary device 10 is returned to its rest position. The auxiliary device 10 can thus be fed to each of the winding spindles 3.1 and 3.2 and thus to each clamping device 4.1 and 4.2 in the transfer phase. For this purpose, the auxiliary device 10 is held laterally next to the winding turret 2 on the machine frame 1.

The bobbin that is completely wound on the winding spindle 3.1 can now be removed and replaced with a new sleeve 17. Around the finished coil 35 from the winding spindle 3.1, a compressed air is first blown inside the winding spindle 3.2, which on the one hand relaxes the clamping device 37 to release the sleeve 1.7 and on the other hand activates the thrust device 21 at the end of the winding spindle 3.2.

As shown in Fig. 3.1 As can be seen, in this case the thrust piston 27 is pressed in the direction of the clamping block 19 against the spring force of the compression spring 26, the clamping plate 20 being displaced via the coupling member 28 and the clamping seat 24 being released. The beginning of the fiber strand of the wound bobbin 35 can thus be released and the bobbin is ready to be removed from the winding spindle 3.1.

After a new sleeve 17 has been pushed onto the winding spindle 3.1, the compressed air in the pressure chamber 29 inside the winding spindle 3.1 is released so that the sleeve is clamped on the circumference of the chuck 18. At the same time, the clamping plate 20 is pressed against the clamping block 19 by the compression spring 26 acting on the thrust piston 27 and the clamping slot 24 is closed again and ready for a new transfer.

Claims (9)

1. Take-up winding device for continuously winding a multifilament fibre strand (34), having two drivable winding spindles (3.1, 3.2) and a rotatably mounted winding turret (2) for holding the protruding winding spindles (3.1, 3.2), wherein the winding spindles (3.1, 3.2) by the winding turret (2) are able to be guided in an alternating manner in an operating region for winding a package (35) and in a changeover region for doffing the package (35), and wherein each of the winding spindles (3.1, 3.2) on the protruding end thereof has a clamping installation (4.1, 4.2) for catching the fibre strand (34), wherein the clamping installation (4.1, 4.2) has a clamping block (19) which is fixedly connected to the winding spindle (3.1, 3.2) and a movable clamping disc (20), said clamping block (19) and said clamping disc (20) being elastic tensioned in relation to one another so as to form an encircling clamping slot (24), characterized in that the clamping disc (20) is coupled to a thrust installation (21) in the interior of the winding spindle (3.1, 3.2) by way of which the clamping disc (20) for opening the clamping slot (24) is displaceable counter to the pretension, wherein the thrust installation (21) is formed by a piston (27) in a pressurized chamber (29), said piston (27) by way of the compression spring (26) being supported on the clamping block (19), and said pressurized chamber (29) for displacing the clamping disc (20) and opening the clamping slot (24) being able to be impinged by a pressurized fluid acting on the piston (27), and in that the clamping slot (24) is assigned a plurality of transverse grooves (25) which are disposed so as to be distributed uniformly on the circumference and which extend partially in the clamping block (19) and partially in the clamping disc (20).
2. Device according to Claim 1, characterized in that the clamping disc (20) and the clamping block (19) are tensioned in relation to one another by a compression spring (26).
3. Device according to Claim 1 or 2, characterized in that the clamping installation (4.1, 4.2) at the end sides of the winding spindle (3.1, 3.2) interacts with an auxiliary installation (10) which has a cutting device (12) having a rotating cutting means (13).
4. Device according to Claim 3, characterized in that the cutting device (12) has a cutter drive (14) for driving the cutting means (13).
5. Device according to Claim 3 or 4, characterized in that the auxiliary installation (10) has two freely rotatable guide rollers (11.1, 11.2) which are assigned to the cutting device (12) and which are held on a movable support (16), wherein the support (16) in a reciprocating manner guides the guide rollers (11.1, 11.2) between a resting position and a catching position.
6. Device according to one of Claims 3 to 5, characterized in that the auxiliary installation (10) is held beside the winding turret (2) on a machine frame (1) and in an alternating manner is able to be supplied to both clamping installations (4.1, 4.2).
7. Device according to one of Claims 1 to 6, characterized in that the clamping disc (20) is guided by a guide shaft (22) at one end side of the clamping block (19), wherein the clamping slot (24) at the end side of the clamping block (19) is formed between a disc collar (23) of the clamping disc (20) and an end face of the clamping block (19), and wherein the guide shaft (22) is connected to the thrust installation (21).
8. Device according to Claim 7, characterized in that the guide shaft (22) of the clamping disc (20) is connected to the piston (27) in the interior of the winding spindle (3.1, 3.2).
9. Device according to one of Claims 1 to 8, characterized in that the clamping installations (4.1, 4.2) at the end sides of the winding spindle (3.1, 3.2) are of identical construction.

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