EP2154277B1 - Warp beam - Google Patents

Description

The invention relates to a warp beam with a shaft and at least one Kettbaumscheibe having a conical bearing surface.

Such a warp tree is out DE 298 09 207 U1 known. If several such warp beams are arranged side by side as part warp beams in the axial direction, the conical contact surfaces make it possible to move the yarn bundles of the warp beams toward one another in order to close a gap between the yarn bundles without resulting in unacceptably high tensions in the edge yarns.

A warp beam is used to wind a warp, i. a family of warp yarns used in a subsequent production of a textile web. Chains are needed especially in the weaving and in the knitting industry.

There are several ways to make a chain. One possibility is to remove a certain number of threads from a gate and to wind them in the form of a tape or ribbon on a warping drum. When the required length of the chain has been reached, that is, a certain number of turns has been wound up, then the ribbon is offset by its width and next to the previously incurred Winding wound up. In order to avoid that threads fall on the front side of the winding, it is known to form this end face conical. This is achieved in that the warping drum has a cone at one axial end, wherein the bands are displaced laterally by a small amount each revolution, so that they move the cone, so to speak, and form a corresponding cone on its other end face.

When the necessary number of ribbons have been wound side by side to achieve the desired width of the chain, the sharpening operation is interrupted. The bands, which until then are virtually endless, are optionally severed at certain points in order to obtain the necessary number of individual threads across the width of the chain. Thereafter, the chain thus formed is transferred to a warp beam. This so-called rebuilding takes a certain amount of time, which is not available for the actual production of the chain.

Another possibility is to remove as many threads from a gate as will be needed later for the chain. In this case you can create the chain on a warp beam. In order to prevent the threads from falling off at the end faces of the roll, warp tree slices are provided on both end faces, which are directed perpendicular to the peripheral surface and thus define the space in which the warp can be wound. If you want to create a chain with a density of a thousand threads per meter and the chain should have a width of, for example, one meter, then you need a gate in which one thousand coils can accommodate. Such a gate is expensive and requires a considerable amount of space. Moreover, with such a large gate, it is very difficult to handle all the threads with the same tension. Another complication is that you have to handle each thread individually at the beginning of the warping process, ie before winding up the yarn sheet on the warp beam. For example, each thread must be guided through a reed. The preparation of the production of such a chain thus also requires a considerable amount of time, which is not available for the actual production process of the chain.

WO 96/34821 A1 shows a single sleeve for simultaneous winding / unwinding of several monofilaments and a method for winding / unwinding the same. The monofilaments are wound simultaneously on a cylindrical sleeve which is connected to a cone. When winding the monofilaments are each offset laterally; so they follow the cone.

DD 128 477 A1 describes a device for controlling the thread width of warping machines for warp beams, in particular Diabolokett. Diabolokett trees have warp slices, which taper from the inside out, creating a trapezoidal storage space for the chain. The thread band width is adjusted by a control cam.

US 4 160 532 A shows a warp beam with two Kettbaumscheiben which are perpendicular to the warp beam axis on its inside and tapered conically on its outer side. The warp beam axis has holes for receiving knotted ends of filament bundles. The Filament bundles are laid out to form the chain later.

DE 20 2005 010 348 U1 shows a warp beam with two Kettbaumscheiben which run on their inner sides perpendicular to the warp beam axis. The Kettbaumscheiben are mounted on a Kettbaumrohr. The warp beam tube has an axially extending groove leading to a radial slot in a warp beam. Through this slot and the groove, an initial portion of the warp sheet can be brought out of the winding area before winding.

The invention has for its object to achieve short production times when producing a chain.

This object is achieved with a warp beam of the type mentioned above in that the warp beam disk distributed in the circumferential direction has a plurality of openings, wherein at least one opening a cross-cord is performed as a divider.

With such a warp beam, one can then combine the advantages of a cone warping machine and the advantages of direct warping on a warp beam. Namely, you can summarize the threads to the above-mentioned ribbon and then individually wrap each ribbon on the warp beam. When winding the ribbon can then hinzubereiner the conical contact surface, so that the winding formed by the ribbon has an inner cone on one end face, namely on the side which abuts against the contact surface of the warp beam, and on the opposite end face an outer cone. At this end then lies next to the next ribbon when winding. The ribbon may be off a smaller number of threads are generated, so that only a smaller gate with a correspondingly smaller number of coil positions is necessary. The handling of the threads at the beginning of a warping process is therefore possible in a much shorter time. At the same time, however, by using the warp beam, which is used directly for producing the warp, it is possible to save the rebuilding, ie the transfer of the warp from the warping drum previously used to the warp beam. The chain is in the new approach then, although in a form in which the individual layers of the turns have a small lateral offset to each other. This is not critical. When unwinding the chain from a warp beam results in relatively low speeds. The speed is determined by the working speed of a subsequent production machine, for example a loom, a sizing machine or a knitting machine. Accordingly, one can slowly shift the warp beam when unwinding in such a machine laterally to ensure a similar yarn feed during the entire production process.

In many cases one would like to be able to make divisions when producing the chain of adjacently arranged bands, for example for a sizing division or for a crosshair. For this it is known in cone warping machines to use cross cords. If the Kettbaumscheibe has multiple openings, then you can, for example, lead a cross-string through such an opening and thus use the same technique that is known from cone warping machines.

Preferably, the Kettbaumscheibe is axially adjustable on the shaft. It is therefore possible to use a warp beam for chains of different widths. If you want to create a narrower chain, then the Kettbaumscheibe is relocated before making the chain accordingly. For example, it is possible to ensure that at the two axial ends an approximately equal space remains free, which is not occupied by the chain. Other divisions are of course possible.

Preferably, the shaft has an external thread onto which the warp beam disk is screwed with an internal thread. Thus, the displacement and the axial fixing of the Kettbaumscheibe on the shaft is relatively easy. You have to twist the warp beam against the shaft only until the desired position is reached. The interaction of external thread and internal thread, however, ensures that the warp beam can be displaced relative to the shaft only by an axially acting pressure.

Alternatively or additionally, it may be provided that the warp beam disk has a clamping device acting on the shaft. The clamping device can be formed, for example by a "lock nut" when using external thread and internal thread. But it can also be easily formed by a clamping device that tightens the Kettbaumscheibe on the circumference of the shaft.

Preferably, the openings are formed as a slot, which extend from radially inward to radially outward. In a preferred embodiment, the slots may be radially aligned. But this is not absolutely necessary. If you form the openings as a slot, then you can arrange the cross cord radially each where it is desired or necessary in the construction of the winding. Thus, it may be useful, for example, to arrange a cross-cord radially as far as possible inside, ie on the outer circumference of the shaft, and a further cross-cord radially as far outside as possible, ie in the region of the outer circumference of the coil. If one is able to move the cross-cords in the radial direction, then there are no unacceptably high voltages in the cross-straps, which has a favorable effect when the cross-cords occasionally have to be pulled a bit further in the course of the winding process.

Preferably, a part device guide is arranged in at least one opening. The divider guide is capable of guiding the corresponding cross cord so that it can not be damaged by sharp edges or the like surrounding the perforations. At the beginning of a warping operation, a cross hook can also be arranged in the parts device guide, which is connected to the cross cord. You can attack at this crosshook to pull the cross cord a little further. This extraction takes place whenever a ribbon has been wound up with the necessary number of turns.

It is preferred that the parts device guide can be fixed in different positions in the radial direction. Thus, one can create from the outset a straight train of the corresponding cross-string through the entire winding, i. the cross cord has at its end adjacent the warp beam disk the same radial distance to the axis of the shaft as at the other axial end. This keeps tension on the cross cord low and thus reduces the risk of damage.

It is preferred that the parts device guide is held by clamping on the warp beam. For example, you can use a clamp shoe. With a clamping bracket is able to effect a nearly continuous displacement of the parts device guide in the radial direction.

It is also advantageous if the contact surface with the peripheral surface of the shaft forms an angle in the range of a maximum of 45 °, in particular a maximum of 20 °. At such an angle results in a favorable structure of the cone. In particular, the risk is low that fall on the free end of the winder threads and confuse.

Fig. 1

eine schematische Darstellung einer Schärvor- richtung,

Fig. 2

eine schematische Darstellung eines Kettbaums und

Fig. 3

eine Stirnseitenansicht auf eine Kettbaum- scheibe.

The invention will be described below with reference to a preferred embodiment in conjunction with a drawing. Herein show:

Fig. 1

a schematic representation of a Schärvor- direction,

Fig. 2

a schematic representation of a warp beam and

Fig. 3

an end view on a Kettbaum- disc.

Fig. 1 shows in highly schematized form a warping device 1 with a winding beam formed as a warp beam 2, are wound on the threads 3, which are subtracted from a gate 4. The threads 3 are guided by a Kreuzlegeeinrichtung 5 and then by a Schärriet 6, in which they are finally combined into a band 7.

The warp beam 2 is connected to a rotary drive 8. For this purpose, the warp beam 2 at one axial end of a tree receptacle 9, which forms a non-rotatable engagement with the rotary drive 8 with a driver, not shown.

At the opposite end of the warp beam 2 is provided with a further tree receptacle 10 which is mounted in an abutment 11. The counter bearing 11 is displaceable in the direction of a double arrow 12, i. parallel to an axis 13 of the warp beam 2. This makes it possible to first bring the warp beam 2 at one end with its tree receptacle 9 into engagement with the rotary drive 8 and then cause a storage of the other end by the abutment 11.

Rotationally connected to the rotary drive 8 is a cross-cord memory 14, in which a plurality of cross-cord coils 15 is arranged. From each cross cord coil 15, a cross cord 16 can be deducted.

Each cross cord 16 is connected at its end remote from the cross cord coil 15 with a cross hook 17. A pliers attachment 18 is provided, which has a pair of pliers 19 which is movable parallel to the axis 13. This movement can be realized, for example, by displacing the tong attachment 18 parallel to the axis 13. The pliers 19 can grasp a cross hook 17 and displace it with the cross cord 16 fastened thereto, for example by the width of a ribbon 7. In the case of the inner cross strands 16, ie those which are arranged in the region of the warp beam 2, this has the advantage that they are held after one or a few turns of the warp beam 2 of the wound while this 7 ribbon. In the case of the radially outer cross-straps, this has the advantage that they need not be displaced until this is necessary for the construction of the chain, which is produced in the form of a winding 20 on the warp beam 2.

The Schärriet 6 and the Kreuzlegeeinrichtung 5 are movable together, for example via a carriage, not shown, which is driven by a ball screw 21. Also, the pliers attachment 18 can be driven accordingly, for example by a second, not shown ball screw.

At both axial ends of the warp beam 2 Baumeinhebeeinrichtungen 22 are provided which can be used to the warp beam 2 in the warping device. 1 lift and dig out the fully wound warp beam 2 from the warping device 1, as is indicated schematically by double arrows 23.

At the rotary drive 8 facing axial end a Kettbaumscheibe 24 is disposed on the warp beam 2. The warp beam 2 may for example be formed as a tube which is provided on its peripheral surface with an external thread 25. The warp beam disk 24 may have a corresponding internal thread 26, so that the warp beam disk 24 can be positioned on the warp beam 2 in different axial positions. In addition, a fastening device may be provided in a manner not shown, for example in the form of a lock nut which holds the Kettbaumscheibe 24 on the warp beam 2 in the desired position.

Alternatively or in addition to the thread pairing 25, 26 may also be provided a clamping device which holds the Kettbaumscheibe 24 on the warp beam 2 in the desired position.

The Kettbaumscheibe 24 has a bearing surface 27 which is cone-shaped, ie it includes with the axis 13 of the warp beam an acute angle α. This acute angle α is theoretically in the range of 1 to 89 °. Preferably, however, it is at most 45 ° and in a particularly preferred manner it is at most 20 ° or even only 15 °. The presentation of the Fig. 2 is to be understood here purely schematically.

The Kettbaumscheibe 24 has, as shown in Fig. 3 can be seen, a plurality of openings 28, which are formed in the present embodiment as elongated, radially directed openings. However, the openings 28 do not have to run strictly in the radial direction from the inside to the outside, but may also have a different course, if desired.

In four of the illustrated openings 28 guides 29 for the cross hooks 17 and the cross cords 16 are provided. These guides 29 can be positioned and fixed in the radial direction at different locations, for example by means of a clamping shoe (not shown in detail). If the cross-cords 16 are referred to as dividing means, then the guides 29 can also be referred to completely as "part-device guides".

The guides 29 are used at the beginning of the warping process to receive and hold the cross hooks 17, so that the cross cords 16 can be attached to the cross hook 17 before the start of production. For this purpose, the guides 29 are then positioned in the radial direction so that the cross hooks 17 lie in the radial direction at the desired location. For example, a guide 29 will be positioned radially as far inside as possible so that it is adjacent to the periphery of the warp beam 2. Another guide 29 will be positioned radially further out, at a position corresponding to the desired diameter of the winding 20 formed on the warp beam 20. Through this guide 29 then a cross-cord 16 is guided, along which the ribbons 7 are cut later in order to obtain the desired beginnings of the filaments 3.

• Zunächst wird der Kettbaum 2 in die Schärvorrichtung 1 eingelegt. Wenn die Kettbaumscheibe 24 nicht zuvor an der gewünschten axialen Position festgelegt worden ist, wird sie alsdann in die gewünschte axiale Position verfahren. Die Kreuzschnüre 16 werden von den Kreuzschnurspulen 15 abgewickelt und mit den Kreuzhaken 17 verbunden. Alsdann wird das erste Bändchen 7 an dem Umfang des Kettbaums 2 an einer Position befestigt, die der Kettbaumscheibe 24 benachbart ist. Wenn dann der Rotationsantrieb 8 den Kettbaum 2 in Drehung versetzt, zieht der Kettbaum 2 die Fäden 3 aus dem Gatter 4 ab und erzeugt eine Wicklung, die zunächst nur aus einem Bändchen 7 gebildet ist. Dabei wird das Schärriet 6 bei jeder Umdrehung des Kettbaums 2 in Richtung auf die Kettbaumscheibe 24 verlagert, so dass sich eine Wicklung 20 ergibt, deren eine Stirnseite durch einen Innenkonus und deren andere, vom Rotationsantrieb 8 abgewandte Stirnseite durch einen Außenkonus gebildet ist. Der Konuswinkel hier entspricht dem Winkel α.

The warping device 1 works as follows:

• First, the warp beam 2 is inserted into the warping device 1. If the warp beam 24 has not been previously set at the desired axial position, then it is then moved to the desired axial position. The cross cords 16 are unwound from the cross cord coils 15 and connected to the cross hooks 17. Then, the first ribbon 7 is attached to the periphery of the warp beam 2 at a position adjacent to the warp beam 24. When the rotary drive 8 then sets the warp beam 2 in rotation, the warp beam 2 pulls the yarns 3 out of the gate 4 and produces a winding which is initially formed only from a ribbon 7. Here, the Schärriet 6 is displaced in each rotation of the warp beam 2 in the direction of the Kettbaumscheibe 24, so that there is a winding 20 whose one end face is formed by an inner cone and the other, remote from the rotary drive 8 end face by an outer cone. The cone angle here corresponds to the angle α.

When the first ribbon has been completed, then the cross hooks 17 are pulled out by the forceps 19 by the width of a ribbon parallel to the axis 13. In this case, for example, the pliers attachment 18 can be moved. Thereafter, the next ribbon 7 can be wound, which is wound in the same way as the first ribbon with the difference that the second ribbon can not create the contact surface 27 of the cone plate 24, but to the front side of the first coil.

When the winding 20 has been completed, ie the required number of strips 7 have been wound, then the warp beam 2 with the winding 20 is lifted out of the warping device 1. Beforehand, the connection to the rotary drive 8 and the counter bearing 11 is released. Further, the cross cords 16 are severed between the winding 20 and the Kreuzschnurspeicher 14. It may also be beneficial to have the cross hooks 17 previously pulled out of the winding 20 and to have them separated from the cross cords 16. Thereafter, a tree with a finished winding 20 is available for further processing, without the need for rearrangement. Accordingly, even with a gate 4 which can only supply a limited number of filaments 3, a relatively short production time can be achieved in producing a chain.

Claims (9)

1. Warp beam (2) having a shaft and at least one warp beam flange (24) which has a conically formed bearing surface (27), characterized in that the warp beam flange (24) has a plurality of openings (28) distributed in the circumferential direction, wherein a lease band (16) is guided as a separating device through at least one opening.
2. Warp beam according to Claim 1, characterized in that the warp beam flange (24) is axially adjustable on the shaft.
3. Warp beam according to Claim 2, characterized in that the shaft has an external thread (25) onto which the warp beam flange (24) is screwed by way of an internal thread (26).
4. Warp beam according to Claim 2 or 3, characterized in that the warp beam flange (24) has a clamping device acting on the shaft.
5. Warp beam according to one of Claims 1 to 4, characterized in that the openings (28) are in the form of slots which extend from the radial inside to the radial outside.
6. Warp beam according to Claim 5, characterized in that a separating device guide (29) is arranged in at least one opening (28).
7. Warp beam according to Claim 6, characterized in that the separating device guide (29) can be fixed in different positions in the radial direction.
8. Warp beam according to Claim 7, characterized in that the separating device guide (29) is held in a clamping manner on the warp beam flange (24).
9. Warp beam according to one of Claims 1 to 8, characterized in that the bearing surface (27) encloses an angle of at most 45°, in particular at most 20°, with the circumferential surface of the shaft.

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