EP3328767B1 - Arrangement for winding a web of material - Google Patents

Description

The invention relates to an arrangement for winding a material web, in particular Reifencordgewebebahn, with a sleeve-like, can be displaced by a shaft coupling to him winding body, on which the material web is wound, and based on a clamping force holding mechanism to an edge of the wound web to Start the winding on the bobbin to hold, and application of this arrangement.

Such arrangements are used, for example, when producing textile fabrics used to reinforce rubber products such as tires, conveyor belts or hoses and, in the course of their manufacturing process, being pulled from a roll, treated and then rewound with such an arrangement. An example of such a method is the so-called dipping in the production of tire cord fabric, in which the textile reinforcing material is coated with an adhesion-promoting latex layer. This happens at the of the Roll withdrawn material before rewinding. The textile fabric is wetted by a dip or by spraying with a latex suspension, for example, the resorcinol-formaldehyde-latex dip, dried and subjected to a thermo-fixing, and after rewinding the heat-set Reifencordgewebes still subject to a measure to prevent aging processes For example, by wrapping in a light, air and water-impermeable film.

As a winding body are used for winding tire cord fabrics metal cores, coated with a paper sheath metal cores or cores having a central rectangular opening into which a mating rectangular shaft or adapter is used in positive engagement, which is rotatably driven and the winding body in rotation added.

The use of wood cores is in the US 5,535,961 considered to be disadvantageous in terms of low life and due to injury hazards. In this document, it is proposed to form the wound body of a polyethylene material. The ability to be coupled to a rectangular shaft or drive rod is ensured by spacing disks distributed over the axial length inside the cylinder jacket-like polyethylene sleeve, which support the sleeve and have a central rectangular recess into which the shaft can be inserted, as on page 5, rows 12 to 15 of this document is described. The remaining interior is filled after placing end caps with an expanding foam.

A similar shell construction as in the US 5,535,961 is in the DE 102 50 955 A1 disclosed, but with a cylindrical body not of polyethylene, but of metal, on which a paper layer is applied thin.

In order to hold the tire cord to be wound on the winding body at the beginning of winding, several techniques are also known. In US Pat. No. 5,535,961 is formed in the polyethylene sleeve, an axial groove over which the front edge of the tire cord web is placed, after which a suitable bar to the gutter is introduced by means of a rubber hammer in the gutter. In another nowadays mainly used fastening technology, however, the front end of the web is fixed by means of adhesive slip-free on the winding body, preferably double-sided tapes are used.

US 5,785,272 A discloses an arrangement provided for winding eg steel strips with features of the preamble of claim 1.

DE 2 636 662 A1 and DE 22 165 544 B1 disclose each reel drums for winding metal bands, which are provided with several expansion shells.

EP 0 978 470 A2 discloses an improvement for "coreless" working packaging tape rolls to be used in packaging machines with thermoplastic resin packaging tape.

The invention has for its object to further improve an arrangement of the type mentioned in particular with regard to Aufwickelqualität and variability.

This object is achieved by the invention in device-technical terms by a development of an arrangement with the features of claim 1.

It is envisaged that the winding body can be operated for setting the clamping force effected by means of the shaft coupling.

In this way, a simple and slip-free fixing of the material web on the winding body succeeds. In addition, the shaft coupling can synergistically take on an additional function.

The arrangement is preferred for winding material webs in the form of textile fabrics, in particular textile reinforcing materials such as e.g. Tire cord fabrics are designed, which are suitable for reinforcing rubber products. In addition, the arrangement for carrying a wound weight of the wound sheet of 100 kg, preferably at least 500 kg, in particular at least 1000 kg, wherein the arrangement may well carry a weight of 1.5 t or more, in particular 2 t.

For this purpose, it is preferably provided that the winding body has an axial length of at least 50 cm, more preferably at least 100 cm, in particular at least 150 cm.

According to the invention, the winding body has a topological structural property, as a result of which its effective diameter is elastically reversibly changeable. The term "effective" diameter takes into account the fact that seen in cross section, the outer contour of the winding body in one or more of its ingestible states no longer necessarily correspond to the perfect mathematical circular shape, so that you use the effective circumference of the outer contour / π as an effective diameter can.

According to the invention, the topological structure property lies in the opening of the topology of a closed ring. The sleeve-like body thus has at least partially material weakenings in the form of (radially extending) penetrations of the sleeve. It is preferably provided that the opening extends over the full axial length of the winding body. This leaves For example, achieve that the wound body is axially slit during or after it has received its basic shape. With radial, acting from the inside on the inner surface of the sleeve, outward forces, the sleeve can be bent elastically reversible within an elastic deformation range.

In the case of the present invention over the full axial length extending opening, a gap is thus created through the opening, the gap width is preferably infinitely adjustable by means of the shaft coupling. In a particularly preferred embodiment, this gap width (on the outside of the sleeve) in the unloaded state of the wound body is less than 1 cm, preferably less than 6 mm, in particular less than 2 mm. In addition, the winding body is preferably elastic due to its material / material combinations in a deformation region, in that the gap widens by the mechanism described above to preferably more than 6 mm, more preferably more than 9 mm, in particular more than 12 mm, up to a widening of preferably less than 30 mm, more preferably less than 25 mm, in particular less than 20 mm elastically, so that the basic shape reverts to the basic shape after the Aufbiegekraft has been canceled. The bobbin is when coupling (or at its beginning and still of the production of the clamp) to the shaft in this basic form produced before.

According to the invention, it is provided that a holding region of the holding mechanism lies at least partially against the walls of the opening.

According to the invention, the clamping of the material web edge takes place between the opening walls and one or more counterparts (s) of the arrangement inserted into the opening. As a counterpart in a simplest embodiment would be sufficient, for example, an elongated rod which is inserted from the outside into the gap, wherein the rod preferably has an outwardly tapering cross-section. In this case, the inserted into the continuous gap bar by at least 50%, preferably at least 66% of the gap depth (corresponding to the sleeve wall thickness) penetrate, while its outer surface is preferably aligned with the sleeve outer surface. In numbers, this could preferably mean at least a depth of 1 cm. Alternatively, could also have multiple counterparts, for example, shorter Rods are used, it is preferred that the length of a single rod should be at least 20% of the axial sleeve length.

In addition, it is preferred that at least one edging of the opening in its direction of extension deviates from an orthogonal to the winding body outer surface, in particular recedes inwards, preferably by more than 3 °, and preferably by less than 15 °, in particular by less than 12 °. The gap shape is thus at least on one side trapezoidal, in particular a total of trapezoidal. This allows in conjunction with a preferred complementary shape of the mold formed counterpart / s a reliable clamping, over which a satisfactory winding is ensured.

According to the invention, the material of the wound body in particular multi-ply glued paper, preferably more than 70%, in particular more than 90%, and in particular consists thereof. The sleeves may consist predominantly of recycled paper, but also new paper can be used. Thus, depending on the logistical organization, on the one hand, it is possible to guide the winding body between tire cord manufacturer and user in a circle and thus to use it several times. However, there is also the possibility of single use, which can be concretely not only economically, but also ecologically more meaningful. In this context, it is preferably provided that the adhesive for gluing the paper layers is a natural product, such as dextrin. In addition, in case of paperboils, surface roughness (for application purposes) and color (for identification purposes) can be easily varied and they are printable. The inventive clamping without adhesive also prevents sticking of paper to the tire cord fabric.

The radial wall thickness of the winding body is preferably at least 8 mm, more preferably at least 12 mm, in particular at least 15 mm. The combination of the above material selection with this wall thickness is considered sufficient to wind web / sheet of the above weights.

It is preferably provided that the arrangement has an expansion clamping shaft for rotationally fixed coupling to the winding body. For this purpose, pneumatically operated expansion clamping shafts are preferably used in a preferred pressure range between 4 and 10 bar. But also mechanical expansion waves are conceivable. In principle, clamping shafts can be used, in which a comprehensive uniform outer diameter increase occurs during their actuation. In a preferred embodiment, the enlargement of the effective diameter by circumferentially spaced clamping bars, of which preferably at least 6, in particular at least 8 are provided. It is preferably provided that the diameter of the expansion clamping shaft in the unexpanded state is preferably in the range between 1 mm and 6 mm, in particular between 2 mm and 4 mm smaller than the inner diameter of the non-elastically stretched bobbin. The length of the radial tensioning path is preferably at least 1%, more preferably at least 2%, in particular at least 3% of the diameter of the unexpanded expansion span shaft, with 5% or even already 4% being sufficient.

In addition, a drive unit can also be provided, preferably with a torque range between 200 Nm and 800 Nm, in particular 400 Nm to 650 Nm.

In a preferred embodiment it is provided that a clamping bar of the expansion clamping shaft in the rotationally fixed coupled state (at least partially) protrudes into the opening. In this variant, the structure of the winding body is matched to the dimension of the tensioning strip system that a secure clamping of the material web by means of the counterpart / the counterparts is still guaranteed. It is thus created a driving in the form of a lock against mutual torsions, so that there is no noticeable Abrief on the sleeve inside due to, for example, a slipping of the expansion tension shaft in the winding body.

In addition to the above-mentioned advantage of the additional function for adjusting the clamping, the expansion tension shaft also offers an advantage in a producible frictional connection of the coupling, via which a high degree of round travel of the winding body can be realized.

The invention discloses at this point also independently and independently of the nature of the holding mechanism and the shape of the bobbin worth protecting an arrangement for winding a material web, in particular Reifencordgewebebahn with a sleeve-like winding body and an expansion clamping shaft for rotationally fixed coupling to the winding body, wherein the expansion clamping shaft is designed to be introduced into the winding body in an unexpanded state and to provide a rotationally fixed connection with the winding body in an expanded state.

The advantages of the procedural application of the arrangement are already apparent from the above illustration of the arrangement according to the invention. In a particularly preferred process design, a method is provided for winding a material web, in particular of tire cord fabric, in which a) an arrangement according to one of the preceding claims is provided, b) the winding body is placed on the expansion tension shaft, c) by expanding the expansion tension shaft the opening of the Winding body widens to a gap of a first circumferential extent, d) introduces the edge of the material web into the gap, and e) by relaxing the expansion tensioning shaft reduces the gap to a second circumferential extent and thereby clamps the material web.

It is provided in step d) in particular that the insertion of the web takes place in the form of a U-loop, within which the or the counterparts are also introduced into the gap. The introduction of the counterparts can be done by appropriate gap widening force-free and especially by hand, but it could also not done (completely) force-free under Werkzeughinzunahme.

In a variant of the method, in the state of the expansion span shaft and the winding body produced in step e), a rotationally fixed coupling between the shaft and the winding body is produced, with the advantages explained above.

A reliable winding succeeds with take-up speeds of preferably greater than 25 m / min, preferably greater than 40 m / min, in particular greater than 55 m / min, but also greater than 70 m / min. Due to the high Aufwickelpräzision enabled by the arrangement according to the invention, but winding can also take place at even higher speeds, namely 120 m / min, even up to or more than 140 m / min, even 160 m / min or higher, preferably not more than 200 m / min is used as take-up speed.

Other features, objects and advantages of the invention will become apparent from the following description with reference to the accompanying drawings, the only one FIG. 1 shows a cross-sectional view of an arrangement according to the invention, in which a Reifencordgewebebahn, for illustrative purposes only consisting of a layer R, is wound on the winding body of the arrangement.

In the Fig. 1 arrangement shown by the reference numeral 3 is an expansion of the clamping shaft, the inside about its central axis via a suitable coupling has a drive, for example via a Benninger adapter 5. The expansion clamping shaft 3 can be coupled here to a drive whose torque is 500 Nm in this embodiment, and can provide a winding speed of up to 200 m / min. The diameter of the expansion crankshaft is 148 mm with a tension between 148.5 mm and 154 mm. The length can be adapted to the existing drive unit on site and otherwise adapted to the length of the bobbin.

The expansion span shaft 3 is a shaft which can be operated pneumatically with an operating pressure of 6.0 bar and has a number of 10 tension bars distributed equidistantly around its circumference. These hold in the in the FIG. 1 shown state frictionally formed in the form of a cardboard tube made of recycled paper and other types of paper and an outer layer of parchment and / or other types of paper wound body a length of 1750 mm and outer diameter of 182.4 mm. However, the cardboard tube has no closed ring structure, but is slotted (in the basic form is a slot / gap, for example, a few, here 2 mm), so that when passing through the clamping path after contact of the clamping bars with the inner diameter of the cardboard tube (here 152.4 mm) a bending of the gap (in the figure at the location of the vertically upwardly expanding clamping bar) takes place. As a result, a rod-shaped counterpart 2, entraining the material web end, can be introduced into the gap. Then, the clamping force can be adjusted to a desired value by slightly reducing the expansion of the expansion span shaft 3.

In this way, especially at the mentioned high winding speeds, it is possible to wind up a tire cord fabric roll weighing 1.8 t in this exemplary embodiment.

The invention is not limited to the details shown in the embodiment. The scope of protection is determined by the following claims.

Claims (14)

1. Arrangement for winding a web of material, in particular a web of tyre cord fabric, comprising a sleeve-like winding body (1), which can be set into rotation by a shaft coupled thereto, onto which the web of material is wound and which has a topological structural property which lies in the opening (6) of the topology of a closed ring and which can be used to modify the effective diameter of the winding body in an elastically reversible manner; and comprising a holding mechanism that is based on a clamping force in order to hold an edge of the web of material to be wound to the winding body at the beginning of the winding process, wherein the opening (6) extends across the full length of the winding body (1), a clamping area of the holding mechanism covers the walls of the opening at least in part and the winding body is operable for a clamping force adjustment caused by means of the shaft coupling (4),
   characterised in that the material of the winding body includes paper particularly with multiple layers of glue, and the edge of the web of material is clamped between the walls of the opening and one or more counterparts (2) inserted into the opening from outside.
2. Arrangement according to claim 1, wherein a counterpart (2) is provided extending axially at least across the width of the web of material and in particular across essentially the full axial length of the winding body.
3. Arrangement according to claim 1 or 2, wherein at least one wall of the opening does not extend in a direction perpendicular to the outer surface of the winding body, and in particular recedes inwards, preferably by more than 3°, preferably by less than 15° and more preferably by less than 12°.
4. Arrangement according to claims 1 to 3, wherein a surface of one or more counterparts opposite a wall of the opening is created in a form complementary to the respective surface of the wall of the opening.
5. Arrangement according to one of the preceding claims, wherein the material of the winding body (1) includes more than 70%, in particular more than 90% paper in particular with multiple layers of glue, or consists of the same.
6. Arrangement according to one of the preceding claims, wherein the radial wall thickness of the winding body is at least 8 mm, preferably 12 mm, and more preferably 15 mm.
7. Arrangement according to one of the preceding claims, comprising an expanding shaft (3) for rotationally fixed coupling to the winding body (1).
8. Arrangement according to claim 7, wherein the diameter of the expanding shaft (3) in the unexpanded state is preferably between 1 mm and 6 mm and particularly between 2 mm and 4 mm smaller than the inside diameter of the non-elastically expanded winding body (1).
9. Arrangement according to claim 7 or 8, wherein a clamping bar (4) of the expanding shaft protrudes into the opening, in the rotationally fixed state.
10. Method for winding a web of material, particularly made from tyre cord fabric, comprising the steps of

    a) providing an arrangement according to one of the preceding claims,

    b) placing the winding body on the expanding shaft,

    c) expanding the opening of the winding body to obtain a gap of a first circumferential dimension by expanding the expanding shaft,

    d) inserting the edge of the web of material and the one or more counterpart into the gap from outside, and

    e) reducing the gap to a second circumferential dimension by relaxing the expanding shaft, thereby clamping the web of material.
11. Method according to claim 10, wherein step d) includes the insertion of the web of material in the form of a U-shaped loop in which the one or more guided counterparts are inserted into the gap.
12. Method according to claim 10 or 11, wherein a rotationally fixed coupling between the shaft and winding body exists in the state of the expanding shaft and winding body created in step e).
13. Method according to one of claims 10 to 12, wherein winding is performed at a rate of at least 25 m/min, preferably at least 40 m/min, more preferably at least 55 m/min, and most preferably 70 m/min.
14. Use of an arrangement in accordance with one of claims 1 to 9 for winding a web of tyre cord fabric, particularly with a method according to one of claims 10 to 13.

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