EP3697710B1 - Winding device - Google Patents

Description

The invention relates to a winding device for winding a fiber strand into a bobbin according to the preamble of claim 1.

Such winding devices for winding a fiber strand in the form of a thermoplastic ribbon, multifilament thread or monofilament are used in large numbers in textile machines or extrusion systems in order to continuously wind the fiber strand into a coil at the end of a manufacturing process or a treatment process. Winding devices of this type have a number of auxiliary devices in order to carry out an automated bobbin change after completion of a bobbin winding, so that an operator does not have to intervene to change the bobbin.

A take-up device for winding a fiber strand into a coil is, for example, from WO 2015/055399 A2 famous. A take-up device according to the preamble of claim 1 is through WO 00/55084 A1 famous.

The well-known winding device has a bobbin holder which is fork-shaped and is held pivotably in a machine frame. Clamping plates are provided at the free end of the bobbin holder arms in order to fix a bobbin tube for receiving a bobbin. At the beginning of a coil winding, the bobbin holder can be held in an operating position in which the bobbin holder interacts with a pressure roller. The fiber strand is laid by an upstream traversing device in such a way that the coil is wound with a cross winding. The coil is driven via the clamping plates, at least one of which is coupled to an electric motor. After completion of the coil winding, the coil holder can be guided from the operating position into a release position in order to deliver the finished coil to a coil deposit. The bobbin tray is on an opposite one machine long side. Here, the thread is guided by the traversing device into a predetermined changing position in order to be taken over by an injector device during the pivoting movement of the bobbin holder. For this purpose, the injector device has a cutting means and a suction nozzle in order to pick up the fiber strand after it has been severed and to feed it continuously to a waste container. The finished bobbin is now removed from the bobbin holder and replaced with a new bobbin tube. The bobbin holder can then be pivoted back into the operating position, so that the thread can be caught on a new bobbin tube and wound into a new bobbin with the aid of catching devices.

In order to be able to carry out the automated bobbin change, the fiber strand must be severed and picked up by the injector device. It has now been found in practical use that very different fiber strands have to be produced and wound into coils. In particular with coated multifilaments, which are designed to be particularly rigid and rigid, difficulties arose, particularly when sucking off the fiber strand. The relatively rigid and rigid fiber strand lay down only on a suction opening of the injector device.

It is therefore the object of the invention to further develop the generic winding device in such a way that, regardless of the material of the fiber strand, a safe bobbin change without the intervention of an operator is guaranteed.

This object is achieved according to the invention in that the injector device has a slit-shaped suction opening which extends in the thread running direction of the fiber strand running onto the bobbin, the suction opening being partially covered by a cutting means which extends transversely to the suction opening with a knife.

Advantageous developments are defined by the features and feature combinations of the respective dependent claims.

The invention has the particular advantage that, on the one hand, the suction flow generated at the suction opening can occur in a highly concentrated and directed manner. On the other hand, immersing the fiber strand after it has been severed is made much easier. Due to the slit-shaped suction opening, which is aligned parallel to the fiber strand, even very stiff fiber strands can be reliably gripped. So that after the fiber strand has been severed, the free end of the fiber strand can be caught directly by the suction flow of the suction opening, it is provided that the suction opening is partially covered by a cutting means, which extends transversely to the suction opening with a knife. This immediately cuts through the fiber strand at the suction opening.

According to an advantageous development of the invention, the suction opening is designed with a rectangular opening cross section, which has an opening width in the range from 1 mm to 5 mm. This means that both fine and thick fiber strands can be safely picked up at the usual injector pressures.

In order to obtain a sufficient opening length of the suction opening for receiving rigid fiber strands, according to a preferred development, the suction opening is designed funnel-shaped with the opening length increasing towards the outside and has an opening angle in the range of 40° to 75°. In this way, opening lengths of more than 30 mm can be realized at the suction opening in order to promote the immersion of a cut end of the fiber strand.

To guide the fiber strand and in particular to make a cut when severing the fiber strand, the development is particularly advantageous in which the suction opening is delimited by a cutout in a partial area not covered by the cutting means in such a way that the knife forms a contact edge for the fiber strand. So are no additional ancillary facilities required to feed the fiber strand to the knife. Simply by pivoting the spool holder, the fiber strand running off the wound spool can be automatically severed and sucked off in the injector device.

In order to be able to use several variants of the suction opening in the winding device if possible, the development of the invention is particularly advantageous in which the suction opening is formed in an adapter that is attached to an injector housing in such a way that the suction opening is connected to a suction channel in the injector housing is. This makes it possible for the suction opening on the injector device to be changed quickly by replacing the adapter.

To generate the suction flow at the suction opening, a compressed air connection is preferably formed immediately below the adapter on the injector housing. This ensures short lengths for generating the suction flow.

Further advantages of the winding device according to the invention are described in more detail below using an exemplary embodiment of the winding device according to the invention with reference to the attached figures.

Fig. 1

schematisch eine Vorderansicht eines Ausführungsbeispiels der erfindungsgemäßen Aufspulvorrichtung,

Fig. 2

schematisch eine Seitenansicht des Ausführungsbeispiels aus Fig. 1,

Fig. 3

schematisch eine Querschnittsansicht einer Injektoreinrichtung des Ausführungsbeispiels aus Fig. 1,

Fig. 4

schematisch eine Draufsicht der Injektoreinrichtung aus Fig. 3,

Fig. 5

und

Fig. 6

schematisch eine Seitenansicht des Ausführungsbeispiels aus Fig. 1 in unterschiedlichen Betriebssituationen bei einem Spulenwechsel.

Fig. 7

schematisch eine Seitenansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Aufspulvorrichtung

They represent:

1

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

2

schematically shows a side view of the embodiment 1 ,

3

schematically shows a cross-sectional view of an injector device of the exemplary embodiment 1 ,

4

schematically shows a plan view of the injector device 3 ,

figure 5

and

6

schematically shows a side view of the embodiment 1 in different operating situations during a bobbin change.

7

schematically a side view of a further embodiment of the winding device according to the invention

In the figures 1 and 2 an exemplary embodiment of the winding device according to the invention for winding a fiber strand into a coil is shown schematically in several views. In figure 1 is the embodiment in a front view and in figure 2 shown in a side view. Insofar as no express reference is made to one of the figures, the following description applies to both figures.

The exemplary embodiment has a bobbin holder 1 which is fork-shaped and has two bobbin holder arms arranged at a distance from one another 1.1. and 1.2. having. The bobbin holder 1 is held within a machine frame (not shown here) by a pivot axis 2 and can be pivoted about the pivot axis 2 via an actuator 5 . At the free ends of the coil holder arms 1.1 and 1.2. a clamping plate 3.1 and 3.2 is arranged on an inner side, which clamp a winding tube 19 between them. A bobbin drive 4 is assigned to the clamping plate 3.1 on the bobbin holder 1 in order to drive the bobbin sleeve 19 during the winding of a fiber strand.

For winding a bobbin 16, the bobbin holder 1 is held in an operating position in which the bobbin holder 1 interacts with a contact roller 6. The coil 16 is held in contact with the contact roller 6 . In order to allow the coil 16 to grow, the coil holder 1 is then displaced about the pivot axis 2 .

A traversing device 7, a deflection rod 12 and a thread guide roller 13 are arranged upstream of the contact roller 6 in the thread path. The thread guide roller 13 forms the beginning of a so-called traversing triangle, in which a fiber strand is guided back and forth by a traversing thread guide 8 of the traversing device 7 . The fiber strand is marked here with the reference number 15 and could be formed by one or more foil strips, one or more multifilament threads or by one or more monofilaments.

In this exemplary embodiment, the thread guide roller 13 is assigned a force measuring device 14 in order to measure a thread tension on the tape 15 that is approaching. The force measuring device 14 is connected to a control unit 11 which is also coupled to the coil drive 4 . Consequently the circumferential speed of the bobbin 16 can be controlled via the bobbin drive 4 as a function of a winding tension.

The curved deflection rod 12 is provided between the yarn guide roller 13 and the traversing device 7 in order to obtain speed equalization during the traversing of the fiber strand.

The traversing drive 9 of the traversing device 7 is formed in this exemplary embodiment for driving the traversing thread guide 8 by a reverse thread roller 9.2 and an electric motor 9.1. The traversing thread guide 8 is guided within a groove, not shown here, on the circumference of the spiral-threaded shaft 9.2. The reverse thread shaft 9.2 is associated with a sensor device 10 in order to determine the position of the traversing thread guide 8 within a traversing stroke. Sensor device 10 and electric motor 9.1 are coupled to control unit 11.

The contact roller 6 is freely rotatably mounted in the machine frame. An injector device 17 is arranged on the side of the contact roller 6 opposite the traversing device 7 . The injector device 17 has a cutting means 17.1 and a suction opening 17.2 in order to cut through the fiber strand during a bobbin change and to lead it briefly to a waste container. The structure of the injector device 17 is explained in more detail below.

A tube magazine 18 for receiving a plurality of bobbin tubes 19 is arranged above the bobbin holder 1 . The tube magazine 18 interacts with a tube actuator 20 in order to supply one of the bobbin tubes 19 to the bobbin holder 1 as required.

In order to be able to carry out an automated bobbin change, a bobbin tray 21 is formed on a side of the machine frame opposite to the traversing device 7 . The bobbin tray 21 has a rolling track 22 in order to keep a bobbin 16 ready for clearing after it has been released by the bobbin holder 1 . To deposit a bobbin 16, the bobbin holder 1 is pivoted between the operating position and into a release position. By opening at least one of the clamping plates 3.1 or 3.2, the bobbin 16 can thus be transferred to the bobbin tray 21. Before releasing the bobbin 16 from the bobbin holder 1, however, it is necessary for the fiber strand 15, which is continuously fed and wound up on the circumference of the bobbin, to be severed and the fiber strand 15 fed in must be sucked off. Then the coil can be braked by the coil drive 4 and then released.

The injector device 17 has a slit-shaped suction opening 17.2 in order to reliably cut through and suck off any type of fiber strand. In the Figures 3 and 4 an exemplary embodiment of the injector device 17 is shown in several views. In figure 3 is the injector device 17 in a cross-sectional view and in figure 4 shown in a plan view without cutting means. Insofar as no detailed reference is made to one of the figures, the following description applies to both figures.

The injector device 17 has an injector housing 24 which is penetrated in front of a middle suction channel 26 . At a blowing end of the injector housing 24, a waste line 29 is connected, which is connected to a waste container not shown here. The injector housing 24 is connected to an adapter 23 at an opposite suction end. The connection between the adapter 23 and the injector housing 24 is preferably designed to be detachable in order to be able to replace the adapter 23 . A funnel-shaped suction slot 27 is formed in the adapter 23, which penetrates the adapter 23 completely. The suction slot 27 tapers towards the injector housing 24 and is connected to the suction channel 26 . At the opposite end, the suction slot 27 forms the slot-shaped suction opening 17.2.

As can be seen in particular from the illustration in figure 4 shows, which shows a top view of the adapter 23, the suction opening 17.2 has a rectangular opening cross section, which has an opening width. The opening width is in figure 4 marked with the small letter b. The opening width b of the suction opening is in the range of 1 mm to 5 mm, preferably in the range of 2 mm to 4 mm.

As shown in the illustration in figure 3 shows, an opening length of the suction opening 17.2 is determined by an opening angle of the funnel-shaped suction slot 27. The opening angle is in figure 3 marked with the code letter α. In order to obtain a sufficient opening length for receiving the fiber strand, the opening angle α is preferably in the range from 40° to 75°. Thus, suction openings with an opening length in the range > 30 mm can be realized.

The cutting means 17.1 is arranged on the upper side of the adapter 23. For this purpose, the cutting means 17.1 has a knife holder 31 and a knife 32 held on the knife holder 3.1. The knife holder 31 is arranged on the adapter 23 in such a way that the knife 32 extends transversely to the suction opening 17.2. The suction opening 17.2 is partially covered by the knife holder 31, the knife holder 31 partially having a separating slot in the area of the suction opening 17.2. In the area of the suction opening 17.2 that is not covered by the knife holder 31, the adapter 23 has a cutout 28 so that the suction opening 17.2 below the knife 32 extends. The knife 32 forms a contact edge for the fiber strand in order to obtain an automatic cutting of the fiber strand.

The installation of the injector device 17 in the area of the bobbin holder 1 is such that the slit-shaped suction opening 17.2 extends in the thread running direction of the fiber strand 15 running onto the bobbin 16. The position of the fiber strand 15 during the bobbin change is fixed by the traversing device 7 in such a way that the suction opening 17.2 and the positioned traversing thread guide 8 lie in one thread running plane. In that regard, the position of the traversing yarn guide 8 is determined for the bobbin change as a function of the position of the suction opening 17.2.

As shown in the illustration in figure 3 further shows that a compressed air connection 25 is formed on the injector housing 24 directly below the adapter 23 . The compressed air connection 25 is connected to a compressed air line 30 . Compressed air is introduced into the suction channel 26 towards the blowing end via the compressed air connection 25 .

In the figures 5 and 6 is the embodiment off figure 1 and 2 shown in different operating situations, from which the function of the injector device 17 is evident. Thus, when initiating a bobbin change, the traversing thread guide 8 is first guided by the traversing device 7 into a changing position which is matched to the suction opening 17.2 of the injector device 17. In this phase, the spool 16 is driven further and the fiber strand is wound as a bead on the circumference of the spool 16 . Now the bobbin holder 1 is guided from the operating position into the release position. This situation is in figure 5 shown.

As the pivoting movement of the bobbin holder 1 progresses, the driver strand 15 running onto the bobbin 16 is guided into the injector device 17 , the fiber strand being severed at the blade 32 . The end of the incoming fiber strand that is formed in the process is caught directly by the suction opening 17.2 and the suction flow generated therein and drawn into the suction slot 27. The end of the fiber strand enters the suction channel 26 via the suction slot 27 and is guided via the waste line 29 to a waste container. This situation is in the figure 6 shown. In this case, the bobbin holder 1 has already delivered the bobbin 16 to the bobbin holder 21 and is now receiving a new bobbin tube via the tube magazine 18 . The bobbin holder 1 is guided back into the operating position together with the new bobbin tube 19, so that the incoming fiber strand can be rewound and wound into the bobbin 16 by a catching device.

In the 7 another embodiment of the winding device according to the invention is shown schematically in a side view. The embodiment after 7 is essentially identical to the aforementioned exemplary embodiment 1 and 2 , so that only the differences are explained below and otherwise reference is made to the above description.

At the in 7 illustrated embodiment, a swivel arm 32 is assigned to the coil holder. The pivot arm 32 is guided pivotably on a pivot axis 34 by an actuator, not shown here. The swivel arm 32 has a guide element 33 at the free end. The guide element 33 can be guided from a rest position into the yarn path of the fiber strand in the area of the injector device 17 .

In the 7 the operating situation is shown for this purpose, in which a bobbin change is imminent. After the fiber strand has been wound as a bead on the circumference of the spool 16 , the swivel arm 32 is activated by an actuator in such a way that the guide element 33 grips the fiber strand 15 in the area between the contact roller 6 and the spool holder 1 . As the swivel arm 32 continues to move, the guide element 33 guides the fiber strand 15 directly into the suction opening 17.2 of the injector device 17. The fiber strand 15 is severed by a blade of the injector device 17, so that the end of the incoming fiber strand 15 is cut directly by the suction flow generated by the injector device 17 is drawn into the suction slot. As soon as the fiber strand 15 has been picked up by the injector device 17, the swivel arm 32 is returned to its rest position.

The bobbin change and the takeover of a new bobbin tube and the takeover of the fiber strand is carried out as in the exemplary embodiment 1 and 2 already described.

Claims (6)

1. Take-up winding device for winding a fibre strand (15) so as to form a package (16), having a package holder (1) for receiving a winding tube (19), wherein the package holder (1) is disposed so as to be pivotable in a machine frame and for changing a package is able to be guided to a releasing position, having a traversing installation (7) for depositing the fibre strand (15) on the package (16), and having an injector installation (17) for separating and suctioning the fibre strand (15) during a package change;

   wherein the injector installation (17) has a slot-shaped suction opening (17.2) which extends in the thread running direction of the fibre strand (15) running onto the package (16),

   characterized in that the suction opening (17.2) is partially covered by a cutting means (17.1) which by way of a knife (32) extends transversely to the suction opening (17.2).
2. Take-up winding device according to Claim 1, characterized in that the suction opening (17.2) has a rectangular opening cross section having an opening width (b) in the range from 1 mm to 5 mm.
3. Take-up winding device according to Claim 1 or 2, characterized in that the suction opening (17.2) is configured in the shape of a funnel, having an opening length that increases towards the outside and an opening angle (α) in the range from 40° to 75°.
4. Take-up winding device according to one of Claims 1 to 3, characterized in that the suction opening (17.2) in a sub-region not covered by the cutting means (17.1) is delimited by a cut-out (28) in such a manner that the knife (32) forms a run-on edge for the fibre strand (15).
5. Take-up winding device according to one of Claims 1 to 4, characterized in that the suction opening (17.2) is configured in an adapter (23) which is fastened to an injector housing (24) in such a manner that the suction opening (17.2) is connected to a suction duct (26) in the injector housing (24).
6. Take-up winding device according to Claim 5, characterized in that a compressed air connector (25) is configured on the Injector housing (24) so as to be directly below the adapter (23).

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