EP1358121B1 - Winding tube and method for the production thereof - Google Patents

Abstract

The invention relates to a winding tube for winding up bands, films, sheets of metal or similar made of a spiral shaped wound metal strip whose adjacent strip windings overlap at least partially. The metal strip has a corrugated or ribbed profile in the cross-section thereof, whose external corrugated heads ( 1 ) are disposed on the outer wall of the winding tube after winding and are wider than the internal corrugated heads ( 2 ) disposed on the inner wall of the winding tube after winding.

Description

Technical area

The invention relates to a winding tube for winding Tapes, films, sheets or the like, consisting of a helically wound metal strip consists whose adjacent tape rolls at least partially overlap, wherein the metal strip in cross-section a corrugated or has ribbed profile. The invention also relates a method for producing a winding tube.

To long slides or bands of thin plastic, paper or to be able to store and transport metal, these become on a winding core, usually a winding tube, wound and in this wound state as coils or tape wraps handled. They are winding cores or cardboard cores, Plastic or metal, especially aluminum known. Especially the most frequently used cardboard cores, mostly Only once, but sometimes used several times can, are relatively heavy and make disposal Problems. Because these sleeves as well as those made of plastic and Metal existing sleeves at radial load a high Must have wall strength and bending strength exist They usually come from many layers of cross and / or wrapped overlapping and glued together Kraft paper webs. When recycling these sleeves solve Therefore, difficult to, so the recycling process takes a long time and is expensive. But also at the deposition on landfills bring such, mostly only Once used pods problems, as they are very difficult rot and barely on due to their wall and bending stiffness small dimensions are compressible.

State of the art

From EP 0 729 911 A1 is an improved winding tube known. It consists of a metal corrugated tube, made of a helically wound, longitudinally corrugated or longitudinal ribbed band is formed, with adjacent band wrap overlap at least at their edges, and indeed preferably at least half its bandwidth, so that at least two-ply sleeve wall is formed. The known winding tube preferably has a smooth, uninterrupted outer wall surface created by the fact that the waves or ribs a rectangular or trapezoidal Have cross section; so that the wave or rib heads on the outer and on the inner wall of the sleeve abut each other. Then the outer and inner shaft heads of the sleeve wider than the spaces between these wave heads, in the cited patent as "wave feet" be designated.

For the preparation of this known winding tube is first by helically winding a longitudinally corrugated or longitudinal ribbed metal bands a tube with at its edges produced overlapping tape wounds. Then be the wave heads by exerting a radial pressure flattened the tube while broadening it.

Instead of or after this flattening, the pipe may be in Axial direction are compressed so that the gaps between the heads further reduce or close. To the upsetting encounter both the wave heads on the Pipe outer wall and the shaft heads on the pipe inner wall together, what the resulting winding tube a special Gives stiffness. From the resulting pipe will then Winding cores cut to the desired length.

In practice, however, it has been shown that the spaces between between adjacent wave heads alone by flattening the Shaft heads can not be completely closed. It Therefore, no smooth tube outside wall, but between the adjacent wave heads remain columns that the damage wound material or at least the Winding process difficult. The upsetting of the winding tube in Axial direction is therefore inevitable. In addition, the known winding tube a comparatively high weight in Relationship to peak crush strength, i. to the radial Deformability of the winding tube. From the two mentioned Therefore, the production of the winding tube designed disproportionately expensive.

Presentation of the invention

The invention is therefore based on the object, a Winding tube whose production is less expensive than the the well-known winding tube and still a smooth Exterior wall and has high strength, and a method for To create such a winding tube.

The solution of this task is done on the one hand by the im Claim 1 described winding tube.

Accordingly, after winding on the Sleeve outer wall located outer shaft heads of the Metal band wider than that after winding on the Sleeve inner wall located inner shaft heads.

This leads to the significant advantage that the According to the invention, the winding tube has a smooth outer wall and that at the same time used the material of the longitudinal ribbed or longitudinally corrugated metal strip efficiently can be exploited, so that an improved Relationship between the weight and the Peak compressive strength of the winding tube results.

Because the inner head areas of the adjacent waves or Ribs need not touch, can for this Areas of relatively little material are used. Adjacent outer wave heads touch against it and form the required gapless outer wall. Here it is particularly advantageous that even the pre-profiled Metal strip is designed asymmetrically that the outer Wave heads on the later pipe outside are wider than the inner shaft heads on the later pipe inside, because so are the gaps between the outer wave heads already at the output profile compared to the outer shaft heads even relatively small and can be easily removed by flat pressing outer shaft heads are closed. There is also more Material for the profile webs, ie for the area between the outer and inner wave heads available what the radial deformation resistance and the moment of resistance of Benefits overall profiles.

Preferred developments of the method according to the invention are described in the further claims.

In an advantageous embodiment, each encounter adjacent waves / ribs of the profile of the winding tube in Sections of their located on the sleeve outer wall outer Head areas to each other or almost to each other, and the on the sleeve inner wall located inner head portions of the adjacent waves / ribs are completely separate from each other spaced.

While it is in principle conceivable that at the Sleeve outer wall located wave heads and touch Nevertheless, each configured around, it is preferred that the wave heads are flat. The outer wall of the resulting winding tube then not only has no Spaces between the individual outer wave heads on, but also corresponds in longitudinal section one essentially straight line. The so educated winding tube according to the invention is particularly suitable for Winding flat sheet material, e.g. from Aluminum sheets, which in the case of a less smooth Sleeve outer wall would deform during winding, so that at least the innermost layers of the wound material not be fully usable.

A smooth outer wall of the winding tube is e.g. thereby get that outer shaft heads in cross section be designed trapezoidal. The inner wave heads on the sleeve inner wall, however, can be designed round, So in particular keep the shape that they have Profiling the metal strip was given.

Furthermore, the metal strip can advantageously so be wrapped that the tape wraps at least around the Half of their bandwidth overlap. The resulting pipe wall then consists of at least two tape layers, what the Strength of the winding tube further improved.

For an even smoother outer surface and / or an even better To achieve flexural rigidity of the winding tube, at the Sleeve outer wall, a cover layer of a film glued, sealed or otherwise secured.

The solution to the above problem occurs on the other by the method described in independent claim 8 for producing a winding tube.

As a result, a flat metal strip is first longitudinally corrugated or longitudinally ribbed pre-profile strip formed, its wave or rib edges with a, perpendicular to the plane of the metal strip form a flank angle β. The longitudinally corrugated or longitudinally ribbed tape then becomes like that helically wound, each adjacent Tape wrap at least partially overlap, leaving a Pipe is created. The metal strip has a cross section wavy or ribbed profile, which after the Winding on the sleeve outer wall located outside Shaft heads are wider than the one after winding up the sleeve inner wall located inner shaft heads. The on the outside of the tube outer heads of the waves or Ribs are then used by exerting a radial Pressure on the tube flattened and widened.

The resulting tube is then wrapped in cores of the cut to desired length.

The inventive method has the advantage that already with little effort a very rigid and Resistant winding tube with low total weight can be produced. Since already the initial profile like that asymmetrically designed is that the outer wave heads at the later tube outer wall are wider than the inner tube Wave heads on the later pipe inner wall, are the gaps between the outer wave heads of the output profile in Relative to these outer wave heads already relative small. For closing these gaps need the outer Wave heads therefore only to a small extent flat or to be pushed. The in the known Manufacturing process necessary, expensive subsequent Upsetting is eliminated. It also eliminates the need, too the inner shaft heads on the pipe inner wall to achieve flattening sufficient bending stiffness: The Profile is designed for the inner wave heads relatively little material can be used, so that around more material for the webs between the outer and the inner wave heads is available. The more material used for these webs, the higher is the radial Deformation strength of the winding tube.

Further advantageous embodiments of the invention Method are described in the further claims.

In an advantageous embodiment of the method remain after upsetting the outer wave heads at the Inner tube or rib heads located inside the tube completely spaced from each other.

The flank angle β of the pre-profile strip is preferably about 5 °, so that the Vorprofilband easily to a tube can be wound.

In an advantageous embodiment of the invention However, the Vorprofilband first has a method Flank angle α, which is between 15 ° and 25 °. Then is the Vorprofilband stackable, that is, when winding of several band turns superimpose the flanks the band underside evenly on the flanks of the Band top. A twisting, splashing or otherwise deformation of the profile does not take place. In particular, the Vorprofil therefore on a Be wound on a coil of material whose diameter during Winding the specially designed pre-profile only increases comparatively slowly. The profiled tape can doing so by a straight or in the radial direction in the radial direction movable profile roller in the area of the casserole of the profiled strip are guided on the pre-material roll. This ensures that the band edge edges exactly put on each other and the profile band edge straight is wound.

To the subsequent winding of the tape to a Winding tube with a relatively low radial compressive force a However, obtaining smooth surface is as above described, the flank angle β of about 5 ° appropriate. The Vorprofilband with the flatter edge angle α is therefore, possibly rolling from the just described Starting material coil, even further deformed until the flank angle β of about 5 ° is reached.

This results in a significant flexibility of the Manufacturing process: the pre-profile band can be at a first Production facility produced, to a Vormaterialspule wound up, transported to a second production site and there to the winding tube according to the invention be further processed. The latter is preferably done where the winding tubes later also for winding up Tapes, foils, etc. are needed. Then the deleted Need to transport empty cores that much Need storage space.

It is therefore no longer necessary, the whole Manufacturing process - i. in particular profiling the Tape and winding into a winding tube - uninterrupted and at a single manufacturing facility perform. This separation of the manufacturing process also results in a reduction in the size of the Winding device, which is no longer the up to 20 Profile pairs must accommodate.

In a further advantageous embodiment of the invention Finally, the distances between the waves or Rip the metal strip before or during the subsequent Winding process even further reduced. These are the Waves pushed together, which is preferably by means of at Winding process used guide rollers happens. Thereby the compression of the outer shaft heads is facilitated because the Wave heads with small distances between the wave heads no longer need to be crushed so much. It is sufficient a comparatively low compression to the gaps close between the wave heads.

Brief description of the drawings

The invention will be described below by way of example in FIG The drawings illustrated embodiment closer explained.

In detail shows

Fig. 1

a cross-section through a for producing a can be used according to the invention Pre-profile strip after a first deformation step of inventive method,

Fig. 2

a cross-section through a for producing a can be used according to the invention Profile strip after a further forming step,

Fig. 3

a cross section through two interlocking Layers of one for the preparation of a novel Winding tube usable profile band,

Fig. 4

a cross section through two interlocking Layers of one for the preparation of a novel Winding sleeve usable profile strip whose Wave heads have been pushed further together,

Fig. 5

a longitudinal section through a wall of a winding tube according to the invention,

Fig. 6

a usable in the process according to the invention Profiling device,

Fig. 7

a usable in the process according to the invention Winder,

Fig. 7a

an enlarged view of the left part of FIG. 7,

Fig. 7b

an alternative winding device,

Fig. 8

a usable in the process according to the invention Leadership, and

Fig. 9

a profiling and winding device from the State of the art.

Detailed description of a preferred embodiment the invention

1 shows a metal strip, preferably an aluminum strip, that has been reshaped into a longitudinally corrugated pre-profile strip is.

It can be clearly seen that the outer shaft heads 1 of the profile are wider than the inner shaft heads 2 of the Profile. The outer shaft heads 1 are later at the Outside wall of the resulting winding tube may be arranged, the inner shaft heads 2 on the inner wall. A wave flank forms with a vertical on the band level one Flank angle α, which lies between 15 ° and 25 °. The in Fig. 1 profiled strip shown is stackable or rollable, can So first stored in this form or be transported.

For profiling this aluminum strip, for example the device shown in Fig. 6 are used. The Metal strip runs from a first coil 3, is in a Device 4 greases, of first profiling rollers. 5 profiled and rolled up on a primary material role 6.

The profiled band is doing by a radial Direction straight or in the arch movable profile roller 13 in Area of the casserole of profiled tape on the Feedstock role 6 out. This ensures that the Tape edge edges are placed exactly on each other and the Profile strip is wound straight-edge.

Fig. 2 shows the profile strip after another Forming step. The flank angle has an angle β decreases and is now about 5 °. The material is therefore not as good stackable as the Vorprofilband, However, the steeper flank angle is favorable to be in the subsequent winding process a smooth surface of the To achieve winding tube.

The apparatus used for this purpose is shown in FIG. 7: the Pre-profile strip runs from the primary material roll 6 and is formed by second roll forming 7 to the Flank angle β to form.

Figs. 3 and 4 show the metal band during the Winding process. From Fig. 3 it is clear that two layers of metal band mesh. The metal band has it nor the profile shown in Fig. 2. During the Winding process, the waves of the profile even further pushed together, so that the profile shown in Fig. 4 arises. This process step also serves in the subsequent winding process with little effort a smooth Surface of the outer wall of the winding tube to reach.

Fig. 5 shows the final profile of a device according to the invention Winding tube as a longitudinal section through a wall of such Sleeve. The wide outer wave heads 1 of the profile are flattened so that a smooth, uninterrupted outer wall of the winding tube has resulted. Due to the foregoing process steps, i. by virtue of the steep flank angle β and due to the Pushing the waves together, is to flat pressing the outer shaft heads only a comparatively small radial Force necessary. The comparatively small inner Shaft heads 2 have not been further deformed. A high Flexural rigidity of the winding tube is still due to the uninterruptible outer wall and in that relative much material for the profile webs 12 between the outer and the inner shaft heads 1 and 2 has been used.

For winding the tape to the winding tube according to the invention serves a winding device. The winding tubes off profiled tape can do this with two different Winding devices are produced, of which the first is shown in the left part of Fig. 7 and from a Winding mandrel 8 and profiled guide rollers 9 consists. Fig. 7a is an enlarged view of this winding device with winding mandrel. In this device, the web strip bent around the winding mandrel 8. Guide rollers 9, around the Arbor 8 are arranged, cause the strip of tape helically running around the spine. In the embodiment are this six guide rollers 9 provided, depending on However, pipe diameters can also be more or less Guide rollers 9 may be present.

In an alternative shown in Fig. 7b Winding device is a three-roll bending apparatus 10 the Tape strips the desired curvature. The guide rollers 9 Here, too, cause the tape strip helical running. In the area where the wave heads flattened are, here is a counter-roller 14 is arranged as no Winding mandrel is present.

The guide rollers 9 are each profiled so that their Webs fill in the gaps between two wave heads. each Guide roller 9 engages over several tape turns into the profile of the pipes. Around the shaft distances of the The profile can shrink during the process Guide rollers 9 also divided into sections which cover the band slopes.

Fig. 8 shows a guide roller 9, which in four Sections A to D is divided, with the distances between webs 15 of the guide roller 9 of section to Reduce section. In section A, the profiled Band led around the thorn, without the distances between the Reduce waves. In sections B and C, the Distances between the shafts of guide roller 9 to Guide roller 9 reduced. Subsequently, the outer Wave heads in one step or in several steps, for example, by means of section D of some Guide rollers 9, flattened.

Finally, Fig. 9 shows a profiling and Winding device according to the prior art. Conventionally, a metal strip 3 in a device 4 greased, then pre-profiled with first profiling rollers 5, further formed with second profiling rollers 7 and finally wound up in a winding device 8, 9. The used device is comparatively large, and the entire manufacturing process must be in a single process be performed. The inventive method allows it, on the other hand, to divide the manufacturing process and thus also to reduce the size of the devices used.

Claims (15)

1. Winding tube for winding up strips, foils, sheet metal or the like, comprising a helically wound metal strip, of which the adjacent strip turns at least partially overlap, wherein the metal strip in cross section has a corrugated or ribbed profile,
   characterized in that
   the outer wave crests (1) of the metal strip, which after winding are situated at the tube outer wall, are wider than the inner wave crests (2) thereof, which after winding are situated at the tube inner wall.
2. Winding tube according to claim 1, characterized in that in each case adjacent waves/ribs of the profile in portions of their outer crest regions (1) situated at the tube outer wall mutually abut or almost mutually abut and that the inner crest regions (2) of the adjacent waves/ribs that are situated at the tube inner wall are disposed entirely apart from one another.
3. Winding tube according to one of claims 1 or 2, characterized in that the crests (1) of the waves/ribs that are situated at the tube outer wall are of a flat configuration and hence form in the tube longitudinal section a substantially straight line (11) .
4. Winding tube according to at least one of the preceding claims, characterized in that the wave crests (1) at the tube outer wall are trapezoidal in cross section.
5. Winding tube according to at least one of the preceding claims, characterized in that the inner wave crests (2) at the tube inner wall are round in cross section.
6. Winding tube according to at least one of the preceding claims, characterized in that the metal strip is wound in such a way that the strip turns mutually overlap by at least half of their strip width, so that the tube wall comprises at least two strip layers.
7. Winding tube according to at least one of the preceding claims, characterized in that on the outer side of the tube a covering layer is applied, which is preferably of the same material as the winding tube itself.
8. Method of manufacturing a winding tube having the following method steps:

   (A) first, a flat metal strip is formed into a longitudinally corrugated or longitudinally ribbed preliminary profile strip, the wave- and/or rib flanks of which together with a perpendicular to the plane of the metal strip form a flank angle (β),

   (B) the longitudinally corrugated or longitudinally ribbed strip is then wound by means of a winding apparatus (8, 9, 10, 14) in such a helical manner that in each case adjacent strip turns at least partially mutually overlap so as to produce a tube, the metal strip in cross section has a corrugated or ribbed profile, of which the outer wave crests that after winding are situated at the tube outer wall are wider than the inner wave crests thereof that after winding are situated at the tube inner wall, and

   (C) the outer crests of the waves or ribs that are situated at the tube outer side are then flattened and widened by exerting a radial pressure upon the tube.
9. Method according to claim 8, wherein in step (C) the inner wave- or rib crests situated at the tube inner side remain disposed entirely apart from one another.
10. Method according to claim 8 or 9, characterized in that the flank angle (β) is approximately 5°.
11. Method according to one of claims 8 or 9,
    characterized in that the preliminary profile initially has a flank angle (α) of between 15° and 25°, and that the preliminary profile strip is then further deformed until its wave- or rib flanks together with a perpendicular to the plane of the metal strip form the flank angle (β).
12. Method according to claim 11, characterized in that the preliminary profile strip is guided by means of a profile roller (13), which is movable in radial direction in a straight or curved manner, in the region of the point where the preliminary profile strip runs onto the input stock roll (6).
13. Method according to claim 11 or 12, characterized in that the preliminary profile strip having the flank angle (α) is stackable and is wound up into an input stock coil (6) before being deformed to the flank angle (β).
14. Method according to at least one of claims 8 to 13, characterized in that the spaces between the individual waves and/or ribs of the profile strip are reduced immediately before or during the helical winding of the profile strip in step (B).
15. Method according to claim 14, characterized in that the reducing of the spaces between the individual waves or ribs is effected by means of guide rollers (9), which are part of the winding apparatus (8, 9, 10, 14).

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