EP0729911B1 - Metallic winding core - Google Patents

Abstract

The sleeve is in the form of a metallic tube, around which paper, metal or synthetic materials in strip, film, or sheet form can be rolled up. The tube may be made as a helical strip with smooth longitudinal corrugations or ribs, such that the adjacent coil of the strip overlaps at least along its edges. Adjacent coils may overlap by half the width of each strip, so that the wall of the tube has two layers (5,6). The corrugations may have flat heads (1), and may have rectangular, trapezoidal or round cross sections.

Description

The invention relates to a winding tube for winding Tapes, foils or sheets made of plastic, paper, metal or the like and a method of manufacturing a such a winding tube.

Around long foils or tapes made of thin plastic, paper or being able to store and transport metal, they 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 winding cores made of cardboard, Plastic or metal, especially aluminum, is known. Especially the particularly frequently used cardboard cores, the most can be used only once, but also several times can be relatively difficult and make disposal Problems. Since these sleeves as well as those made of plastic and Metal existing sleeves with a high radial load Wall strength and bending strength must exist they usually consist of many layers of across and / or overlapping wound and glued together Kraft paper webs. These tubes come off during recycling therefore difficult to open, making the recycling process undesirable takes a long time and is expensive. But also with the Deposits to landfills usually bring them to land only once used pods problems because they are very difficult to rot and because of their wall and bending stiffness, hardly any Dimensions are compressible.

DE 661 567 C relates to a bobbin, in particular for Rayon threads. This known thread spool is thereby characterized that their radius and their coil length are changeable. To do this, it consists of a screw coiled folded strips, the radius of which by turning is changeable, which also increases the Coil length results.

The invention is therefore based on the object To create a winding tube that is relatively lightweight, very high radial strength and bending stiffness and is easily recyclable.

This task is accomplished by a winding tube with the features of claim 1 solved.

Further configurations of the winding tube are the subject of Claims 2 to 9.

Thereafter, it is advantageous that the form of a corrugated tube wound winding tube so wound is that the tape turns are at least half of theirs Bandwidth overlap and thus an at least two-layer Form tube wall. If a particularly wall and bending resistant If the winding tube is desired, the tape windings should turn around 2/3, 3/4 or more of their bandwidth overlap and thus one form a three-layer, four-layer or multi-layer pipe wall. Here, longitudinally corrugated or longitudinally ribbed is understood that the longitudinal extension of the waves or the ribs in Longitudinal direction of the tape runs.

It is particularly useful if the waves of the tube in the Cross-section are trapezoidal. It is also expedient that the Tube heads located outside the tube are wider than that shaft feet on the inside. To increase the bending stiffness, the butt welded shaft heads together, be soldered or glued.

To get a smooth outer surface and / or around one high bending stiffness by connecting the shaft heads can also reach one on the inside or outside of the pipe Cover layer made of a foil (same material as that Sleeve) stuck on, sealed or otherwise attached. The smooth outer surface has become very thin when winding Foils proven to be beneficial to wrinkles in the wrap avoid. A cover layer on the inside increases the Stability of the winding tube.

The winding tube can be made of foils or tapes Be made of aluminum, steel or copper. This can it may be advantageous if the material of the winding tube is is the same as that of the film to be wound or winding tape. In this case, those on the Wrapping sleeve possibly remaining ends of the on the Sleeve of wound tape or film can be recycled together with the winding tube.

In addition to the great advantage, the winding tube according to the invention the simple recycling option, possibly even together with coil or winding remnants on it, the Another advantage of a relatively low weight corresponding to the usual cardboard cores Flexural rigidity, being simple and easy to manufacture is cheap. With special devices this can Winding tube despite its high bending stiffness, for example for transport to the recycling plant, compressed and transported to save space.

A method of making a The winding tube is the subject of claim 10 in the event in which a longitudinally corrugated metal strip is assumed. For the possibility that a longitudinally ribbed metal band a relevant procedure results from being used claim 11.

Further configurations of the manufacturing process result themselves from claims 12 to 14.

Although it is already by helically winding corrugated pipes made with longitudinally corrugated metal strips tape wraps overlapping at their edges, including those with flattened outer wave crests, known (e.g. DE 2 235 012 A). However, these known corrugated pipes serve as Line pipes for the line of primarily gaseous Media, such as pipes in ventilation and air conditioning systems or the like, but not for the production of Winding sleeves for winding tapes, foils or sheets made of plastic, paper, metal or the like.

Finally, claim 15 is directed to the use of Winding sleeve for winding tapes, foils or sheets made of plastic, paper, metal or the like.

In addition to coiled corrugated pipes are also as conduit pipes known corrugated pipes that are not made by winding one longitudinally corrugated tape are made, but by Extrusion, blow molding or upsetting rolls (e.g. EP 0 474 449 A2). Due to their curl, i.e. through the im Longitudinal section of wall of different thickness can be made these tubes have a great deal of flexibility at the same time obtained high radial compressive strength, so that with them Pipe curvatures can be created like this pressure-resistant pipelines is often necessary. The waves of the aforementioned, not by winding The corrugated pipe produced can have a triangular cross section and have flattened outer and inner shaft heads, wherein them with the corresponding heads of the neighboring waves can collide. This is said to despite the pipe great flexibility, the smoothest possible inner surface be awarded what a turbulence-free flow in the Pipe is highly desirable.

Fig. 1

zeigt eine Querschnittshälfte eines Abschnittes einer Ausführungsform der erfindungsgemäßen Wickelhülse im Längsschnitt durch das Rohr;

Fig. 2

zeigt einen vergrößerten Ausschnitt des Längsschnitts durch die Rohrwand dieser Ausführungsform;

Fig. 3

zeigt eine Querschnittshälfte eines Abschnittes eines zur Herstellung der erfindungsgemäßen Wickelhülse dienenden Wellrohres im Längsschnitt;

Fig. 4

zeigt eine Querschnittshälfte eines Abschnitts eines anderen zur Herstellung der erfindungsgemäßen Wickelhülse verwendeten Rohres im Längsschnitt;

Fig. 5

zeigt schematisch einen Längsschnitt durch die die Wickelhülse bildenden Bandwickel;

Fig. 6 bis 10

zeigen Teillängsschnitte durch ein Wellrohr zur Herstellung der Wickelhülse vor dem Flachpressen der Wellenköpfe und Stauchen in Rohrlängsachse in zwei verschiedenen Ausführungsbeispielen;

Fig. 11

zeigt im Schnitt in schematischer Darstellung eine Vorrichtung zur Herstellung eines Wellrohres durch wendelförmiges Wickeln eines längsgewellten Bandes;

Fig. 12

zeigt einen Schnitt durch einen Teil einer anderen Ausführung einer solchen Vorrichtung;

Fig. 13

zeigt das Flachpressen der Wellenköpfe und des Wellengrundes durch Preßwalzen während der Rohrwicklung.

Exemplary embodiments of the winding tube according to the invention and of the method used to manufacture it are described below, which result from the drawing:

Fig. 1

shows a cross-sectional half of a portion of an embodiment of the winding tube according to the invention in longitudinal section through the tube;

Fig. 2

shows an enlarged section of the longitudinal section through the tube wall of this embodiment;

Fig. 3

shows a cross-sectional half of a section of a corrugated tube used to produce the winding tube according to the invention in longitudinal section;

Fig. 4

shows a cross-sectional half of a section of another tube used for producing the winding tube according to the invention in longitudinal section;

Fig. 5

schematically shows a longitudinal section through the tape winding forming the winding tube;

6 to 10

show partial longitudinal sections through a corrugated tube for the production of the winding tube before the flat pressing of the shaft heads and upsetting in the tube longitudinal axis in two different embodiments;

Fig. 11

shows in section a schematic representation of a device for producing a corrugated tube by helically winding a longitudinally corrugated band;

Fig. 12

shows a section through part of another embodiment of such a device;

Fig. 13

shows the flat pressing of the shaft heads and the shaft base by press rolling during the tube winding.

1 and 2, the tube wall has the Winding tube a honeycomb or parcel-like structure, the triangular honeycombs through on their outer and inner heads 1, 2 flattened shafts or ribs one in Tube axis direction of compressed corrugated tube are formed. The Flanks 3 of the waves are in longitudinal section through the tube in essentially rectilinear, so that the honeycomb approximately triangular cross section with partly inward, some have an outward pointing tip. The honeycomb forming, flattened and compressed shafts or ribs bump with their widened by the flat pressing inner and outer heads 1, 2 to each other and can their abutting edges by welding, soldering or glued to each other. On the outside of the A cover layer 19 is provided for the winding tube.

A longitudinally corrugated sleeve is used to manufacture this winding tube or smooth, roughly rectangular cross-section, which in a winding device helically to a corrugated tube (Fig. 3) or finned tube (Fig. 4) is wound. The Winding pitch is such that there are two consecutive Tape roll 4 overlap by about half of their bandwidth (Fig. 5) so that the tube along its entire length Wall has two superposed band layers 5, 6.

When using a corrugated tube, the outer and inner heads 1, 2 of which in Fig. 6 in cross section shown waves by exerting a radial pressure flattened and widened, causing these waves to break in 7 shows a cross-sectional shape with inclined flanks 3 receive. Then the corrugated pipe in the axial direction compressed until the waves with their widened outer and abut inner heads 1, 2.

When using a finned tube have in Fig. 9 in Ribs shown in cross section already flat outer and inner Heads 1, 2, so that this tube only in the axial direction must be compressed to that shown in Fig. 10 Get the rib heads together.

To manufacture the winding tube, the one shown in FIG serve schematically illustrated device. In this The device is the metal strip 8 drawn off from a coil 7 passed through pairs of guide and forming rollers 9, the desired longitudinal corrugation of the tape according to FIGS. 6 and 9 give. The longitudinally corrugated band 10 then runs into a A winder, the one shown in Fig. 11 Example of a winding mandrel 12 rotatable about its axis 11 and arranged on the circumference of this winding mandrel and Winding rollers 13, 14 is formed. Mandrel 12 and rollers 13, 14 can one of the longitudinal corrugation or longitudinal ribbing of the tape have appropriate profiling. In this winder the tape is wound helically around the mandrel 12, whereby the waves or ribs of the thereby formed adjacent tape wrap in the area of the overlap interlock.

Is the resulting winding tube from one longitudinally corrugated tape shown in FIG. 6, the nested waves of two adjacent tapes in the moment they are between the mandrel 12 and the first Guide roller 13 pass through this mandrel and mentioned role that to flatten and widen their Experiencing radial pressurization serving shaft heads, which makes it approximately the one shown in FIG Dovetail-shaped cross-sectional shape obtained. The flat-pressed shaft heads can then by upsetting the Tube in the axial direction and then by welding, soldering, gluing or the like firmly connected to each other or until the Shaft heads are further deformed by radial pressure.

Fig. 12 shows a winding device, the two each other has opposite inlet and connecting rollers 15, 16, between which the previously corrugated or ribbed Band 10 runs through. Then this volume is through a bending roller 17 is given a bend, causing the tape with further guidance by guide rollers 18 to the tube is formed. The flat pressing and widening of the outer and inner shaft heads 1, 2 are made by pressure rollers 15 ', 16', i.e. between two rollers on one of the Entry point into the winding device following the point are arranged. It also leads to a framework-like Stiffening the pipe wall, giving the pipe its flexibility loses. It becomes a light, rigid pipe with through Get cross ribs stiffened double wall, of which each cut the length of the desired winding tube can be.

Claims (15)

1. Winding sleeve for the take-up of strips, foils or sheets of plastic material, paper, metal or the like, in the form of a corrugated tube made from a helically wound and longitudinally corrugated or longitudinally ribbed metal strip (10) having a plurality of corrugations or ribs, wherein adjacent strip turns overlap, and the corrugations or ribs at the outside of the tube have flat corrugation heads or rib heads (1) and adjacent corrugation heads or rib heads (1) abut or almost abut one another.
2. Winding sleeve according to claim 1, characterized in that the strip turns overlap one another at least by half of the strip width.
3. Winding sleeve according to claim 1, characterized in that the corrugations are trapezoidal in cross section.
4. Winding sleeve according to claim 3, characterized in that the corrugation heads (1) situated at the outside of the tube are broader than the corrugation bases.
5. Winding sleeve according to claim 1, characterized in that the flanks (3) of the corrugations or ribs abut one another at their base.
6. Winding sleeve according to claim 5, characterized in that the corrugations are substantially triangular in cross section.
7. Winding sleeve according to claim 1, characterized in that the corrugation heads or rib heads (1) situated at the outside of the tube form an, in tube longitudinal section, substantially rectilinear surface.
8. Winding sleeve according to claim 1, characterized in that applied to the outside and/or inside of the sleeve is a cover layer (19) which is preferably made of the same material as the sleeve.
9. Winding sleeve according to at least one of the preceding claims, characterized in that the corrugations or ribs at their abutting regions (1, 2) are fastened to one another, e.g. by welding, soldering or glueing.
10. Method of manufacturing a winding sleeve, whereby first a longitudinally corrugated metal strip having a plurality of corrugations is helically wound to produce a corrugated tube, in which adjacent strip turns overlap, then the outer corrugation heads of the corrugations situated at the outside of the tube are flattened and broadened by exerting a radial pressure upon the corrugation heads, and finally the tube or a tube portion is upset in axial direction in such a way that the corrugation heads at least almost abut one another at their sides.
11. Method of manufacturing a winding sleeve, whereby first a longitudinally ribbed metal strip having a plurality of ribs is helically wound to produce a corrugated tube, in which adjacent strip turns overlap, and finally the tube or a tube portion is upset in axial direction in such a way that the outer rib heads situated at the outside of the tube at least almost abut one another at their sides.
12. Method according to claim 10, characterized in that the inner corrugations heads directed towards the inside of the tube are also flattened and broadened by exerting a radial pressure upon said inner corrugation heads.
13. Method according to claim 10 or 11, characterized in that the abutting regions of the corrugations or ribs are fastened to one another by welding, soldering, glueing or the like.
14. Method according to claim 13, characterized in that a cover layer is applied at the outside and/or inside of the sleeve.
15. Use of a winding sleeve manufactured by the method according to one or more of claims 10 to 14 for the take-up of strips, foils or sheets of plastic material, paper, metal or the like.

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