EP0071273A1 - Method of manufacturing a coiled flexible tube, and coiled flexible tube - Google Patents

Method of manufacturing a coiled flexible tube, and coiled flexible tube Download PDF

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Publication number
EP0071273A1
EP0071273A1 EP82106873A EP82106873A EP0071273A1 EP 0071273 A1 EP0071273 A1 EP 0071273A1 EP 82106873 A EP82106873 A EP 82106873A EP 82106873 A EP82106873 A EP 82106873A EP 0071273 A1 EP0071273 A1 EP 0071273A1
Authority
EP
European Patent Office
Prior art keywords
strip
fold
hose
band
turn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82106873A
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German (de)
French (fr)
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EP0071273B1 (en
Inventor
Friedrich Bürcher
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19813130323 external-priority patent/DE3130323A1/en
Priority claimed from DE19823204244 external-priority patent/DE3204244A1/en
Application filed by Individual filed Critical Individual
Priority to AT82106873T priority Critical patent/ATE16361T1/en
Publication of EP0071273A1 publication Critical patent/EP0071273A1/en
Application granted granted Critical
Publication of EP0071273B1 publication Critical patent/EP0071273B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes

Definitions

  • the invention relates to a method according to the preamble of claim 1 or to a coiled hose according to the preamble of claim 8.
  • Such hoses which are generally manufactured with cross-sectional areas on the order of 50 to 100 cm 2 , are used for permanent installation in buildings, machines or vehicles as air, exhaust air or exhaust gas ducts.
  • a large number of requirements are placed on these hoses, in particular they should be cheap, that is to say simple to manufacture, but at the same time they should be tensile, reasonably flexible in order to avoid special deflection pieces, and in many cases they should also be flame-retardant or even non-flammable.
  • the hose should be light in weight and easy to lay.
  • metal as the hose material.
  • metal for example, aluminum flat channels are known, which consist of aluminum sheet, which is folded into a rectangular tube and provided with a longitudinal seam seam.
  • Such a rigid pipe is fundamentally inferior to hoses in that it is supplied in certain lengths, causes complex transportation, is difficult and difficult to install with different tools, and the storage of various duct parts such as pipe pieces, deflection pieces, transition pieces from round to flat channels etc. required.
  • Rigoform tubes which consist of coiled and corrugated aluminum sheet, the corrugations of which extend in the longitudinal direction of the coiled strips and overlap one another in the edge region, as a result of which the cohesion between adjacent coils is established.
  • the corrugations can be stretched or compressed to a certain extent, which enables the laying of curves.
  • the corresponding pipes are still relatively stiff and a strong pull or a strong overdelanation of the outside of the curve can lead to loosening of the not very tensile connection between adjacent turns.
  • the invention has for its object to provide a simultaneously tensile, flexible, easily transportable and relocatable and if necessary with appropriate material design flame retardant or non-combustible hose.
  • the object is achieved by the invention characterized in claim 1, which can be carried out in particular according to claims 2 or 6.
  • the interlocking folds which in themselves can be of any design - for example, bottle-shaped in cross-section or labyrinthine - have a - seen in cross-section - compressed neck area, which closes the fold volume, in which, as a blocking body, slipping out prevents the fold of the inner strip material from the fold of the outer strip material, in turn a folded structure is arranged.
  • a folding structure forms a blocking body a much larger obstacle that cannot emerge from a small expansion of the neck.
  • the fold of the connecting band has been inserted into the fold, for example in the form of a U-profile, and then together with the edges with the Fold has been squeezed. If the strip material forming the outer fold is a very flexible material, the fold can also be held together from the outside by a band which is curved in the shape of a bow.
  • a corresponding method of hose production can, however, with material which is only slightly stretchable and easily torn, lead to the difficulty that the production of the fold in the free edge of the end turn of the piece of hose already produced pulls the strip material of this end turn back from the direction of this piece of hose , from where, however, it cannot be easily withdrawn in the case of processing stations lying successively along the helical line, since it is held there by these processing stations. There is therefore a risk of cracks.
  • the actual strip material of the turns is no longer withdrawn after the formation of the turn and any shapes such as beads in the edge area are formed beforehand when the strip is fed in, so that no tension occurs in the longitudinal direction of the tube on the strip material during the formation of the hose .
  • the pressure of the five-fold stratification must be very strong in order to produce a material cohesion approximating to a pressure welding, it seems preferable, according to claim 3, to make the edges of the strip material on both sides thicker than the remaining surface of the strip material Unfold form so that the material of the neighboring Windun a certain form-fitting hold to each other.
  • the strip consists of a slightly tearing material, the measure according to claim 4 may be appropriate, which enables the strip to be installed by rotation in the helix without its free edge being subject to the risk of tearing and fraying.
  • the edge area on which the connecting strip is drawn can also be bordered beforehand with a hem tape.
  • the method according to the invention is particularly suitable for the production of aluminum hoses in which tensile stress in the material is avoided as far as possible in view of the low tensile strength of the film material.
  • Tinplate foils and copper foils can also be used as metal foils for the production of completely non-flammable hoses.
  • the method according to the invention can also be advantageously used in the processing of plastic, in particular flame-retardant plastic, and laminated metal foil.
  • the initially circular cross section of the hose produced can be permanently deformed, e.g. to a rectangular shape as a flat channel or to a connector that is round on the one hand and rectangular on the other. The corresponding bending of the material does not require a great deal of force and can possibly also be carried out at the construction site.
  • Fig. 1 shows the production of a coiled hose from a single strip to be coiled from a semi-rigid material, for example from 40 mm wide and 0.1 or 0.2 mm thick pure aluminum foil strip made of anodized aluminum, and a connecting strip made of hard aluminum with a width of 15 mm and a thickness of 0.2 to 0.5 mm.
  • a tube made from these materials without the use of other means such as adhesive tape or the like is completely non-flammable and is at the same time flexible to a certain extent, since in the event of a bend the film can fold up in the bend in the bend.
  • the number of folds is not very high, but such hoses, for example with a diameter of 10 cm, are generally installed once, making the necessary bends, and then remain in this position for the rest of their use.
  • Pure aluminum foil of 0.1 or 0.2 mm thickness fulfills these requirements for flexibility with simultaneous bending stiffness, which is necessary for the cohesion of the adjacent turns.
  • other metal foils of comparable stiffness and flexibility can also be used for the production of non-combustible hoses and comparable plastic foils can also be used for the production of hoses, the flammability of which does not matter.
  • a corresponding metal foil strip 1 is fed in accordance with a direction of movement 2 to a helical guide of known type (not shown in detail) which deflects the strip 1 onto a circular path with a longitudinal component, that is to say a helical path.
  • edge beads 4 of the strip 1 are formed in an edge bead station 3 by turning the edge over on both sides.
  • the edge bead station shown consists of a number of pressure rollers, some of which are driven rollers and some of which are rollers.
  • the strip 1 runs between two guide rollers 5, of which only the upper one is visible, while at its edges two pressure rollers 6 which set up these edges engage with their conical end face.
  • Subsequent pressure rollers 7 press the folded hems down onto strip 1 again.
  • the strip 1 is connected to an already produced piece of hose 8, which consists of the previous length of the strip 1, which is already wound into a spiral rotating in the direction of an arrow 9, with the aid of a connecting band 10.
  • the strip 1 After leaving the edge bead station 3, the strip 1 is supplied with the connecting band 10, in the example described in a plane perpendicular to the plane of the strip 1.
  • This connecting band 10 first runs through a roughening station 11 and is then folded in a folding station 12 around one of the edges of the strip 1, in the example described around that edge which, when the strip 1 is later connected to the already existing piece of hose 8, form its first free end becomes.
  • the folding takes place in the case described game so that about a third of the connecting band 10 is on the underside, while the double width, namely two thirds of the width of the connecting band 10 run along the top of the metal foil strip 1, on which the bead 4 was also folded.
  • the folding leg arranged on the underside is designated by 13, the one running on the top is designated overall by 14.
  • the folding station 12 in turn already divides the folding leg 14 into two halves 15 and 16, of which the folding leg half 16 is bent slightly outwardly so that it can be gripped more easily in a later station.
  • the arrangement of the various pressure rollers which form the folding station 12 is not difficult for the person skilled in the art after the folding program has been presented.
  • the station 12 is shown in the course of the supply of the strip 1 to the tube piece 8, but it could also lie on the free front edge thereof. Likewise, if the function is essentially the same, it is possible for the station to engage on the opposite edge of the strip 1 and / or for the width ratio of the folding legs 13 and 14 to be reversed.
  • the strip 1 is now connected to the already existing hose section 8 as the foremost turn, in that the edge of the strip 1 not shown with the connecting strip 10, shown on the right in the strip 1 in FIG. 1, with a certain overlap area on the inside to the previously free edge the last turn of the strip 1 in the tube piece 8.
  • This edge is the one that has been folded over a certain length beforehand with the connecting strip 10, the folding leg half 16 projecting inwards.
  • the kink between the folding leg halves 15 and 16 abruptly represents the limit of the overlap between the strip material of the successive turns.
  • the tangential approach and inner application of the material of the following strip 1 takes place according to FIG. 1 at a location 17 hidden by the upper tube wall.
  • the folding leg half 16 is folded around the edge of the strip that has laid itself in the angle between the folding leg halves 15 and 16 and the stratification thus created becomes 13-1.4-15-1.4-16 over a wide area or pressed together along lines.
  • a line pressure can ensure that the edge beads 4 are not completely rolled flat, but that the connecting band 10 presses sufficiently firmly on the material of the strip 1 to give a firm connection between the successive turns.
  • the folding station 12 is compared to the embodiment of FIG. 1 on the opposite edge of the strip 1, this is applied to the last turn so that its free edge is in the angle between the folding leg halves 15 and 16 on the incoming strip sets.
  • This can be particularly advantageous if the intended overlap is relatively large and thus the folding leg 16 is wide, since in this case the station 19 can be provided immediately at the point 17 where the strip 1 enters the tube rotation and it does so in terms of inside or outside protruding folding leg half 16 are no difficulties that can arise in the circular arrangement due to tensile or compressive stresses in this leg due to the changed diameter compared to the hose jacket surface.
  • station 19 only a distance far after the winding overlap has been established.
  • this station 19 is also expediently arranged directly at the meeting point 17 even with the connecting band 10 running around the end of the hose section.
  • Fig. 2 shows successive processing steps in the manufacture of the hose.
  • a stage a the strip 1 and the connecting band 10 are still immediately in the state in which they were unwound from the respective supply spools.
  • stage b the strip 1 is already provided with edge beads 4 and the connecting band 11 is already in the state of Folding, whereby the crease between the folding legs 13 and 14 is already visible.
  • Stage c shows the folding leg 14 again divided into its folding leg halves 15 and 16 by a kink.
  • stage d the free edge of the incoming strip 1 or the end turn of the tube piece 8 already produced is placed on the folding leg half 15, and in stage e the folding leg half 16 is again folded down onto this edge of the strip 1.
  • FIG. 3 shows a schematic representation of the connection location of adjacent turns in a representation similar to FIG. 2e, wherein arrows 21 also indicate pressing directions.
  • the strips 1 are not provided with edge beads 4, the pressure according to the arrows 21 must be very strong here in order to achieve a firm connection of the materials.
  • the edge beads 4 are present.
  • the pressing (arrows 21) takes place along a line parallel to the edge beads, as a result of which the cross-sectionally approximately S-shaped configuration of the connecting band 10 has a compressed strip in the central region, the thickness of which is practically the sum of the thicknesses of the material layers.
  • Fig. 5 shows another form of edge processing of the strip 1. This is a bending of the edge or a flanging. When pressing in the region of this bend or flanging, the effect is that the bent edge of the strip 1 hooks onto the connecting band 10.
  • FIG. 7 shows the closing station 19 in a schematic cross section for the case of a hose constructed from two flexible strips, in which an inner spiral and an outer spiral alternate.
  • the station 19 extends over two pressing points at a distance of one spiral step, the below Using rollers, the helical connecting lines between the strip material of successive turns are pressed in two steps, the first of which essentially folds the folded leg half 16 and the second presses along two lines.
  • the seam band 25 is a thin film strip, which is first brought up in a plane perpendicular to the feed plane of the strip 1 and is bent around the edge of the strip 1.
  • the edge of the stripe is well protected and does not tend to fray, even if the thin metal foil tears easily.
  • the material is thus in seven layers, since in addition to the five layers described earlier, the two layers formed by the U-legs of the hem band 25 are added.
  • the opposite edge could also be hemmed in an analog manner before the connecting strip is put on, in particular if the connecting strip is only applied after a certain circumferential angle in the screw region.
  • the strip material is guided through a plurality of guides arranged in a circle in order to carry out its concentricity.
  • the piece of hose 8 runs on a guide bed in the direction of an arrow 22 in accordance with the production speed and later becomes a rectangular cross section by pressure rollers 23, of which a pair or several pairs with axes are arranged tangentially to the piece of hose 8 in two mutually perpendicular directions pressed to be usable for a fire-proof flat duct ventilation system.
  • the pressure rollers 23 can also act on the hose in a separate operation after the hose produced has been separated from the helical guide according to FIG. 1, in order to avoid constructional difficulties resulting from the rotation of the hose result in its longitudinal axis during its winding. If the tube produced is pushed only a little way through the pairs of pressure rollers 23, a transition piece is created between the round and flat channels.
  • the hose produced can also be perforated on the side and changed with a throat, creating a branch piece.
  • the materials described for the aluminum foil strip and the aluminum connecting band can be knurled out and expanded like a homogeneous film tube wall without great difficulty.
  • the metal foil strip 1 is fed in the direction of movement 2 of the helical guide, which likewise deflects the strip 1 onto a circular path with a longitudinal component, that is to say a helical path.
  • rollers 33 press two channel-like folds 34, which protrude as webs on the outside of the strip, along the edges in strip 1.
  • the winding guide pushes the fold of the trailing edge of the preceding turn into Fold of the leading edge of the subsequent turn, so that the turns overlap with an edge area in which the webs or folds on both sides interlock. This is indicated in Fig. 1 at an engagement point 34 '.
  • the rollers 33 can be heated rollers which bring about a permanent change in shape.
  • the connecting band is a U-profile connecting band 35, which is bent to the U-profile in a preliminary station and is inserted into the fold of the two strip windings.
  • the interlocking groove-like folds 34 with the Connecting tape 35 are now pressed together at a compression station 36 by pressing rollers 37, which press the folds 34 in the direction of the arrow, along the edge of their breaking out from the surface of the strip 1, so that an approximately bottle-like web cross section is produced, which is shown in the drawing is shown schematically triangular.
  • the folds 34 are thus redesigned into a connecting structure line 38 which runs in a helical shape around the hose and holds the individual turns of the hose coil together.
  • FIG. 12 schematically shows the stages of a somewhat modified manufacture of the hose, namely with two strips 1 'of different material with a lower stiffness and 1 "of material with a somewhat higher stiffness.
  • the stiffer strips 1" are narrower.
  • state a) shows the three materials to be fed, namely strips 1 'and 1 ", each after the first folding, and two strips 35 of somewhat higher rigidity, which correspond to the U shown in FIG. 12 in state a)
  • state b) which illustrates successive turns, the folds 34, the strips 1 'and 1 "have already been set into one another, so that the folds of the strip 1' are always the inner folds and the folds of the strip 1 "always form the outer folds.
  • the band 35 with a U-cross section is now inserted one after the other, and then the neck lines of the folds 34 are pressed inwards again at the compression station 36, so that again the bottle-like cross-section arises which results in the connection structure line 38, which is shown in the next turn, in this embodiment two coils of connection structure line run n 38 parallel to each other around the hose.
  • the band 35 is intended to form the inner fold, which prevents the present middle fold from slipping out, while the outer fold is formed from the strip 1 ", which is here sufficiently rigid to achieve a clamping effect.
  • the cross-section shows a neck 39.
  • the state b) shows how the folds of the softer strip 1 'have been inserted into the folds of the harder strip 1 ", while according to the states c) the band 35 is first inserted in its folded form the compression station 36 is formed by the pressure rollers 37 into a bottle cross-section and then forms the connecting structure line 38, with a special inner fold 43 formed from the band 35, which otherwise does not form part of the hose wall, a middle fold 44 belonging to the softer strip 1 'and one which is more rigid Stripe 1 "belonging outer fold 45.
  • Fig. 12 the process is illustrated in such a way that the band 35 is first folded and then inserted into the folds 34 of the strips 1 'and 1 ". It is also possible to press the band 35 into the folds 34 of the strips with the aid of a pressure roller 1 'and 1 "to be introduced, this spinning roller also producing the U-cross section of the belt 35.
  • FIG. 13 shows the production of a hose again from hose material of a uniform nature, with the exception of the connecting structure lines, but with a more flexible material than that of the strip 1 "according to FIG. 12.
  • the film strip 1 is processed with great flexibility, which can consist, for example, of a thin aluminum foil laminated with glass fiber fabric or also of a plastic film
  • both a band 46 and the band 35 are additionally required in order to achieve a connecting structure line of sufficient strength Stripes and tapes, especially in the case of the soft stripe 1, the folds 34 can easily be formed together only after the overlap of the edge regions has been produced.
  • Condition b) shows the folds 34 of the strip 1 being joined together, whereupon the folds lying one inside the other may also already be pre-folded tapes 35 and 46 are introduced.
  • State c) indicates the change in shape at the compression station 36 due to the pressure rollers 37, whereupon a four-layer fold as the connecting structure line 38 arises, with an inner fold 48 made of the material of the connecting band 35, a middle fold 49 and an outer fold 50 made of the material of the strip 1 and an outer clip which is formed by the band 46.
  • This structure line 38 is shown again schematically in cross section in FIG. 14 on an enlarged scale.
  • the cross-sectionally bottle-shaped structure which is per se helically encircling, is shown schematically as approximately triangular.
  • the different layers are shown at a mutual distance in order to be able to distinguish them from one another in the drawing, but in fact they are tightly pressed together in the region of the neck 39.
  • the band 35 also has flanges 51 which lie on the outside of the surface of the strips 1.
  • the structural line 38 thus formed protrudes outward from the hose wall, so that the impression of a helical rib is created.
  • the fold protrude into the inside of the hose.
  • the inner fold 48 prevents, as explained, that the middle fold 49 and the outer fold 50 constrict when pulled and slip out of the neck 39.
  • the inner fold 48 fulfills this function in that it has a fold structure which, in the event of pressure on the neck 39, does not tend to wedge and expand the neck 39 due to its deformability and its size.
  • Protruding edges 52 of the two turns of the strip 1 help to ensure that the folds 49 and 50 are not pulled out of the fold in the longitudinal direction of the hose, sliding around the inner fold 48. This is further prevented by the tight contact of the various layers in the area of the neck 39.
  • FIG. 15 shows a structure using the overall structure according to FIGS. 13 and 14, but which has a modified inner fold.
  • This inner fold is in the form of a loose rim bead term role designed, which is made from the tape 35 and is used in the nested folds of the strip 1. After being compressed to form the neck 39, this folding structure also represents an obstacle to the other folds slipping out.
  • the structure according to FIG. 14 is, however, preferred for reasons of production technology.
  • Fig. 16 again shows a modified fold shape, in which, starting from the connection formation according to Fig. 13, a longer fold was formed overall, which is folded over again before the tape 45 is pulled open, so that the frictional area of the neck 39 is extended.
  • Fig. 16 shows the clip formed by the band 45 not fully pressed, so that the different positions of the fold are individually visible. To establish the connection between the hose turns, however, the band 45 is pressed as far as possible.
  • the protruding edges 52 of the strips may also be missing, particularly in the case of a somewhat rough strip material.
  • the strip edges then lie approximately in the region of the neck 39. It is also possible to leave only the strip laterally in the region of the neck 39 which faces the tube interior. The advantage of such a production is that the corresponding edge 52 cannot be erected and can protrude into the hose as a flow brake.
  • the hoses made from the flexible material of the strips 1 have a very high compressibility. For example, they can be completely compressed and transported with minimal volume and pulled apart again at the construction site.
  • the cross-sectional shape of the hoses can be adapted to existing requirements while the shape of the connecting structure line (s) 8 is permanently changed.

Abstract

1. Process for manufacturing a strip-wound hose comprising the steps of : placing at least on foil strip (1) in a helical form with turns thereof placed one after the other, said at least one strip being supplied from a supply of strip to a piece (8) of strip-wound hose, produced at an earlier time and turning about the longitudinal axis thereof, an joining said strip to said piece of hose for increasing length of same, the strip material of adjacent turns being made to mutually overlap along the margins and the adjacent turns along these margins being joined together upon supplying a connection band (10) so as to give a mechanical connection between one such turn and the next turn thereto, said supplied connection band, upon being folded, being so placed that at the position of such overlap it engages said margin zones for fixing the overlapping margin zone in relation to the other of said overlapping margin zones, characterized by the following consecutive steps of : a) folding the connection band (10) about one of the lengthways edges of said strip (1) supplied for joining to said produced piece of hose in such a way that a fold leg (14) of the connection band on an upper side and a fold leg (13) on a lower side of the strip is moved along with the strip for forming a three-layer structure made up of the one layer of the strip material between two layers of the connection band, b) placing the margin zone that is to be overlapped of the strip on a free margin zone of the end turn of the piece (8) of hose produced earlier in such a way that one of the two materials selected from : said strip and said end turn, is placed on one (14) of the fold legs of the connection band (10) that is seated on the other of said materials, over part (15) of the breadth of this fold leg, which placing is carried out at the beginning of, or during bending to become round, of the strip (1), and of or during the overlapping placement of the strip material of the end turn upon forming of the next turn, whereafter part of the length (16) of this fold leg (14), that thus is partly covered over, is kept uncovered and on such covered part (15) of the connection band (10) there is a four-layer structure, that is made up of the connection band, strip material of the one turn, connection band and strip material of the next turn, c) the uncovered part (16) of the fold leg (14) is folded down about the lengthways edge of the placed strip material, such folding taking place so that said uncovered part is placed on said strip material with the production of a five-layer structure made up of the connection band, strip material of one turn, connection band, strip material of the next turn and connection band, d) this five-layer structure so produced is acted upon by a pressing force in a direction normal to the plane of the strip material and the material of the connection band for the purpose of producing a strong connection structure of the materials.

Description

Die Erfindung bezieht sich auf ein Verfahren nach dem Oberbegriff des Anspruchs 1 bzw. auf einen gewendelten Schlauch nach dem Oberbegriff des Anspruchs 8.The invention relates to a method according to the preamble of claim 1 or to a coiled hose according to the preamble of claim 8.

Derartige Schläuche, die im allgemeinen mit Querschnittsflächen in der Größenordnung von 50 bis 100 cm2 hergestellt werden, dienen der im allgemeinen bleibenden Verlegung in Gebäuden, Maschinen oder Fahrzeugen als Luft-, Abluft- oder Abgaskanäle. An diese Schläuche werden eine Vielzahl von Anforderungen gestellt, insbesondere sollen sie zwar billig, also einfach herstellbar sein, aber zugleich zugfest, einigermaßen flexibel, um spezielle Umlenkstücke zu vermeiden, und in vielen Fällen auch schwer entflammbar oder gar unbrennbar sein. Weiterhin soll der Schlauch leicht von Gewicht und leicht zu verlegen sein.Such hoses, which are generally manufactured with cross-sectional areas on the order of 50 to 100 cm 2 , are used for permanent installation in buildings, machines or vehicles as air, exhaust air or exhaust gas ducts. A large number of requirements are placed on these hoses, in particular they should be cheap, that is to say simple to manufacture, but at the same time they should be tensile, reasonably flexible in order to avoid special deflection pieces, and in many cases they should also be flame-retardant or even non-flammable. Furthermore, the hose should be light in weight and easy to lay.

Die Forderungen der Schwerentflammbarkeit bzw. der Unbrennbarkeit können im wesentlichen durch Verwendung von Metall als Schlauchmaterial erfüllt werden. Beispielsweise sind Aluminium-Flachkanäle bekannt, die aus Aluminiumblech bestehen, das zu einem Rechteckrohr gefaltet und mit einer in Längsrichtung verlaufenden Falznaht versehen ist. Ein solches starres Rohr ist Schläuchen grundsätzlich darin unterlegen, daß es in bestimmten Längen geliefert wird, einen aufwendigen Transport verursacht, schwierig und unter Aufwand verschiedener Werkzeuge zu installieren ist und die Lagerhaltung verschiedener Kanalteile wie Rohrstücke, Umlenkstücke, Übergangsstücke von Rund- auf Flachkanal usw. erfordert.The requirements of flame retardancy or incombustibility can essentially be met by using metal as the hose material. For example, aluminum flat channels are known, which consist of aluminum sheet, which is folded into a rectangular tube and provided with a longitudinal seam seam. Such a rigid pipe is fundamentally inferior to hoses in that it is supplied in certain lengths, causes complex transportation, is difficult and difficult to install with different tools, and the storage of various duct parts such as pipe pieces, deflection pieces, transition pieces from round to flat channels etc. required.

Es sind auch mehr oder weniger flexibel biegbare Aluminiumrohre bekannt (z.B. Rigoform-Rohre), die aus gewendeltem und gewelltem Aluminiumblech bestehen, dessen Wellungen in Längsrichtung der gewendelten Streifen verlaufen und einander im Randbereich überlappen, wodurch der Zusammenhalt zwischen benachbarten Windungen hergestellt wird. Die Wellungen können in gewissem Umfang gedehnt bzw. zusammengestaucht werden, was die Verlegung von Kurven ermöglicht. Die entsprechenden Rohre sind jedoch nach wie vor verhältnismäßig steif und ein starkes Ziehen oder eine starke Überdelanung der Kurven-Außenseite kann zu einem Lösen der nicht sehr zugfesten Verbindung zwischen benachbarten Windungen führen.There are also known more or less flexibly bendable aluminum tubes (e.g. Rigoform tubes), which consist of coiled and corrugated aluminum sheet, the corrugations of which extend in the longitudinal direction of the coiled strips and overlap one another in the edge region, as a result of which the cohesion between adjacent coils is established. The corrugations can be stretched or compressed to a certain extent, which enables the laying of curves. However, the corresponding pipes are still relatively stiff and a strong pull or a strong overdelanation of the outside of the curve can lead to loosening of the not very tensile connection between adjacent turns.

Der Erfindung liegt die Aufgabe zugrunde, einen gleichzeitig zugfesten, flexiblen, leicht transportierbaren und verlegbaren und im Bedarfsfall bei entsprechender Materialgestaltung schwer entflammbar oder unbrennbar baubaren Schlauch zu schaffen.The invention has for its object to provide a simultaneously tensile, flexible, easily transportable and relocatable and if necessary with appropriate material design flame retardant or non-combustible hose.

Gemäß der Erfindung wird die Aufgabe durch die im Anspruch 1 gekennzeichnete Erfindung gelöst, die insbesondere nach den Ansprüchen 2 oder 6 durchführbar ist. Bei der Durchführung nach Anspruch 6 haben die ineinanderliegenden Falten, die an sich von beliebiger Konstruktion - beispielsweise im Querschnitt flaschenförmig oder auch labyrinthartig - sein können, einen - querschnittsmäßig gesehen - zusammengedrückten Halsbereich, der das Faltenvolumen abschließt, in welchem als Sperrkörper, der ein Herausschlupfen der Falte des inneren Streifenmaterials aus der Falte des äußeren Streifenmaterials verhindert, wiederum eine gefaltete Struktur angeordnet ist. Im Gegensatz beispielsweise zu einem im Querschnitt runden Körper wie einem Draht, der obendrein den Schlauch gewichtsmäßig schwer machen würde, oder einer Schnur, die bei entsprechendem Zug von der inneren Falte leicht durch den "Hals" hinausgedrückt werden könnte, bildet eine derartige Faltstruktur als Sperrkörper ein wesentlich größeres Hindernis, das aus einer kleinen Aufweitung des Halses nicht hinaustreten kann. Die Falte des Verbindungsbands ist z.B. in Form eine U-Profils bei der Bildung der Falte in diese eingelegt worden und anschließend zusammen mit den Rändern mit der Falte zusammengedrückt worden. Sofern es sich bei dem die äußere Falte bildenden Streifenmaterial um ein sehr flexibles Material handelt, kann obendrein noch die Falte von außen her durch ein im Querschnitt bügelförmig gebogenes Band zusammengehalten werden. Ein entsprechendes Verfahren der Schlauchherstellung kann jedoch bei Material, das nur wenig dehnbar ist und leicht zerreißt, zu der Schwierigkeit führen, daß die Herstellung der Falte im freien Rand der Endwindung des schon hergestellten Schlauchstücks das Streifenmaterial dieser Endwindung aus der Richtung dieses Schlauchstücks her wieder zurückzieht, von wo es sich indessen bei aufeinanderfolgend entlang der Schraubenlinie liegenden Bearbeitungsstationen nicht leicht zurückziehen läßt, da es dort von diesen Bearbeitungsstationen festgehalten wird. Es besteht deshalb die Gefahr von Rissen. Gemäß Anspruch 2 wird dagegen das eigentliche Streifenmaterial der Windungen nach Bildung der Windung nicht mehr zurückgezogen und eventuelle Formgebungen wie Wülste im Randbereich werden bereits zuvor bei der Zuführung des Streifens gebildet, so daß am Streifenmaterial während der Formierung des Schlauchs kein Zug in Längsrichtung des Schlauchs auftritt. Auch mit relativ leicht reißendem Material wie reiner Aluminiumfolie lassen sich deshalb in stetiger Herstellung große Schlauchlängen herstellen, deren Länge allenfalls dadurch begrenzt ist, daß gemäß einfacherer Herstellungsweise der aus der Herstellungsvorrichtung herauskommende Schlauch rotiert; zwar könnte man auch einen nicht-rotierenden Schlauch wickeln, indem man einen entsprechenden Schlauchformierungskopf umlaufen läßt, dies führt jedoch wegen der Zuführung der Streifen und des Verbindungsbands von den jeweiligen Vorratsspulen zum rotierenden Formierungskopf zu einer komplizierteren Konstruktion.According to the invention, the object is achieved by the invention characterized in claim 1, which can be carried out in particular according to claims 2 or 6. In the implementation according to claim 6, the interlocking folds, which in themselves can be of any design - for example, bottle-shaped in cross-section or labyrinthine - have a - seen in cross-section - compressed neck area, which closes the fold volume, in which, as a blocking body, slipping out prevents the fold of the inner strip material from the fold of the outer strip material, in turn a folded structure is arranged. In contrast to, for example, a body with a round cross section, such as a wire, which on top of that would make the hose heavy in weight, or a cord, which could be easily pushed out through the "neck" by pulling it from the inner fold, such a folding structure forms a blocking body a much larger obstacle that cannot emerge from a small expansion of the neck. The fold of the connecting band has been inserted into the fold, for example in the form of a U-profile, and then together with the edges with the Fold has been squeezed. If the strip material forming the outer fold is a very flexible material, the fold can also be held together from the outside by a band which is curved in the shape of a bow. A corresponding method of hose production can, however, with material which is only slightly stretchable and easily torn, lead to the difficulty that the production of the fold in the free edge of the end turn of the piece of hose already produced pulls the strip material of this end turn back from the direction of this piece of hose , from where, however, it cannot be easily withdrawn in the case of processing stations lying successively along the helical line, since it is held there by these processing stations. There is therefore a risk of cracks. According to claim 2, however, the actual strip material of the turns is no longer withdrawn after the formation of the turn and any shapes such as beads in the edge area are formed beforehand when the strip is fed in, so that no tension occurs in the longitudinal direction of the tube on the strip material during the formation of the hose . Even with relatively easily tearing material such as pure aluminum foil, large lengths of tubing can therefore be produced in continuous production, the length of which is at most limited by the fact that the tubing coming out of the manufacturing device rotates according to a simpler manufacturing method; a non-rotating hose could also be wound by rotating a corresponding hose forming head, but this leads to a more complicated construction due to the feeding of the strips and the connecting tape from the respective supply reels to the rotating forming head.

Während bei Verwendung glatter Streifen zur Bildung der Windungen die Pressung der fünffachen Schichtung sehr stark sein muß, um einen einer Druckverschweißung angenäherten Materialzusammenhalt zu erzeugen, erscheint es bevorzugenswert, gemäß Anspruch 3 die beiderseitigen Ränder des Streifenmaterials zu einer im Vergleich zur restlichen Fläche des Streifenmaterials dickeren Form aufzufalten, so daß das Material der benachbarten Windungen einen gewissen formschlüssigen Halt aneinander findet. Sofern der Streifen aus einem leicht einreißenden Material besteht, kann die Maßnahme nach Anspruch 4 zweckmäßig sein, die es ermöglicht, daß der Streifen durch Rotation in der Schraubenlinie verlegt wird, ohne daß sein hierbei freier Rand der Gefahr des Einreißens und Ausfransens unterworfen ist. Erforderlichenfalls kann zusätzlich der Randbereich, auf den der Verbindungsstreifen aufgezogen wird, vorher ebenfalls mit einem Saumband eingefaßt werden.While using smooth strips to form the turns, the pressure of the five-fold stratification must be very strong in order to produce a material cohesion approximating to a pressure welding, it seems preferable, according to claim 3, to make the edges of the strip material on both sides thicker than the remaining surface of the strip material Unfold form so that the material of the neighboring Windun a certain form-fitting hold to each other. If the strip consists of a slightly tearing material, the measure according to claim 4 may be appropriate, which enables the strip to be installed by rotation in the helix without its free edge being subject to the risk of tearing and fraying. If necessary, the edge area on which the connecting strip is drawn can also be bordered beforehand with a hem tape.

Die Maßnahme nach Anspruch 5 hat den Vorteil eines verbesserten gegenseitigen Halts des Materials der benachbarten Windungen.The measure according to claim 5 has the advantage of an improved mutual hold of the material of the adjacent turns.

Das erfindungsgemäße Verfahren eignet sich insbesondere zur Herstellung von Aluminiumschläuchen, bei denen man mit Rücksicht auf die geringe Zerreißfestigkeit des Folienmaterials Zugspannung im Material möglichst vermeidet. Weiterhin kommen als Metallfolien auch Weißblechfolien und Kupferfolien zur Herstellung vollständig unbrennbarer Schläuche in Frage. Das erfindungsgemäße Verfahren ist jedoch auch bei der Verarbeitung von Kunststoff, insbesondere schwer entflammbarem Kunststoff, und kaschierter Metallfolie mit Vorteil anwendbar. Der zunächst kreisförmige Querschnitt des hergestellten Schlauchs kann bleibend weiterverformt werden, z.B. zu einer Rechteckform als Flachkanal oder zu einem Anschlußstück, das einerseits rund und andererseits rechteckig ist. Die entsprechende Zurechtbiegung des Materials erfordert keine große Kraft und kann unter Umständen auch noch an der Baustelle durchgeführt werden.The method according to the invention is particularly suitable for the production of aluminum hoses in which tensile stress in the material is avoided as far as possible in view of the low tensile strength of the film material. Tinplate foils and copper foils can also be used as metal foils for the production of completely non-flammable hoses. However, the method according to the invention can also be advantageously used in the processing of plastic, in particular flame-retardant plastic, and laminated metal foil. The initially circular cross section of the hose produced can be permanently deformed, e.g. to a rectangular shape as a flat channel or to a connector that is round on the one hand and rectangular on the other. The corresponding bending of the material does not require a great deal of force and can possibly also be carried out at the construction site.

Weitere Einzelheiten, Vorteile und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und aus der folgenden Beschreibung bevorzugter Durchführungs- bzw. Ausführungsbeispiele unter Bezugnahme auf die Zeichnung. Es zeigen:

  • Fig. 1 eine schematische perspektivische Draufsicht auf einen aus einem einzigen Streifen und einem einzigen Verbindungsband hergestellten gewendelten Schlauch während der Herstellung ;
  • Fig. 2 schematische Längsschnitte durch die Materialien der Schlauchwand zur Veranschaulichung aufeinanderfolgender Verfahrensschritte der Herstellung der Verbindung zwischen benachbarten Wendelwindungen;
  • Fig. 3 bis 6 schematische Querschnitte durch fertiggestellte Verbindungen verschiedener Konfiguration;
  • Fig. 7 eine schematische Darstellung eines Dreh-Antriebsrads bei der Herstellung eines gewendelten Schlauchs von im Vergleich zu Fig. 1 abgewandelter Konstruktion;
  • Fig. 8 eine Darstellung entsprechend Fig. 1 für eine etwas abgewandelte Durchführungsform;
  • Fig. 9 einen Schnitt in einer Ebene 9-9;
  • Fig. 10 einen schematischen Längsschnitt durch die Materialien der nach Fig. 8 hergestellten Schlauchwand.
  • Fig. 11 eine schematische perspektivische Seitenansicht eines aus einem einzigen Streifen und einem Verbindungsband hergestellten gewendelten Schlauchs während der Herstellung;
  • Fig. 12 und Fig. 13 schematisch Querschnitte durch die Verbindung zwischen benachbarten Wendelwindungen herstellende Falten in verschiedenen Herstellungsphasen;
  • Fig. 14 bis 16 schematische Querschnitte durch fertiggestellte Falten verschiedener Konfiguration.
Further details, advantages and developments of the invention result from the subclaims and from the following description of preferred implementation and exemplary embodiments with reference to the drawing. Show it:
  • Figure 1 is a schematic top perspective view of a coiled tube made from a single strip and a single connecting band during manufacture;
  • 2 shows schematic longitudinal sections through the materials of the hose wall to illustrate successive method steps of establishing the connection between adjacent spiral turns;
  • 3 to 6 schematic cross sections through completed connections of different configurations;
  • FIG. 7 shows a schematic illustration of a rotary drive wheel in the production of a coiled hose of a construction modified in comparison to FIG. 1;
  • 8 shows a representation corresponding to FIG. 1 for a somewhat modified form of implementation;
  • 9 shows a section in a plane 9-9;
  • 10 shows a schematic longitudinal section through the materials of the hose wall produced according to FIG. 8.
  • Figure 11 is a schematic perspective side view of a coiled hose made from a single strip and a connecting band during manufacture;
  • 12 and FIG. 13 schematically show cross sections through folds producing the connection between adjacent spiral turns in different manufacturing phases;
  • 14 to 16 are schematic cross sections through finished folds of different configurations.

Fig. 1 zeigt die Herstellung eines gewendelten Schlauchs aus einem einzigen zu wendelnden Streifen aus einem halbsteifen Material, beispielsweise aus 40 mm breitem und 0,1 oder 0,2 mm starkem Reinaluminiumfolienband aus eloxiertem Aluminium, und einem Verbindungsband aus Hartaluminium einer Breite von 15 mm und einer Stärke von 0,2 bis 0,5 mm. Ein aus diesen Materialien ohne Verwendung weiterer Mittel wie Klebeband oder dergleichen hergestellter Schlauch ist völlig unbrennbar und ist zugleich in gewissem Umfang flexibel, da sich im Falle einer Biegung die Folie in der Biegungskehle zusammenfalten kann. Die Faltzahl ist freilich nicht sehr hoch, derartige Schläuche beispielsweise mit einem Durchmesser von 10 cm werden jedoch im allgemeinen einmal installiert, wobei die erforderlichen Biegungen hergestellt werden, und bleiben dann für den Rest ihres Gebrauchs in dieser Stellung.Fig. 1 shows the production of a coiled hose from a single strip to be coiled from a semi-rigid material, for example from 40 mm wide and 0.1 or 0.2 mm thick pure aluminum foil strip made of anodized aluminum, and a connecting strip made of hard aluminum with a width of 15 mm and a thickness of 0.2 to 0.5 mm. A tube made from these materials without the use of other means such as adhesive tape or the like is completely non-flammable and is at the same time flexible to a certain extent, since in the event of a bend the film can fold up in the bend in the bend. Of course, the number of folds is not very high, but such hoses, for example with a diameter of 10 cm, are generally installed once, making the necessary bends, and then remain in this position for the rest of their use.

Reinaluminiumfolie von 0,1 oder 0,2 mm Stärke erfüllt diese Anforderungen an die Flexibilität bei gleichzeitiger Biegesteifigkeit, die für den Zusammenhalt der benachbarten Windungen erforderlich ist. Für die Herstellung unbrennbarer Schläuche können jedoch auch andere Metallfolien vergleichbarer Steifigkeit und Biegbarkeit und für die Herstellung von Schläuchen, deren Brennbarkeit keine Rolle spielt, auch vergleichbare Kunststoffolien verwendet werden.Pure aluminum foil of 0.1 or 0.2 mm thickness fulfills these requirements for flexibility with simultaneous bending stiffness, which is necessary for the cohesion of the adjacent turns. However, other metal foils of comparable stiffness and flexibility can also be used for the production of non-combustible hoses and comparable plastic foils can also be used for the production of hoses, the flammability of which does not matter.

Ein entsprechender Metallfolienstreifen 1 wird gemäß einer Bewegungsrichtung 2 einer (nicht im einzelnen dargestellten) Wendelführung bekannter Bauart zugeführt, die den Streifen 1 auf eine Kreisbahn mit Längskomponente, also eine Schraubenlinienbahn umlenkt. Vor Erreichen der Führung werden in einer Randwulststation 3 Randwülste 4 des Streifens 1 gebildet, indem der Rand beiderseits umgeschlagen wird. Zur Erzielung dieses Effekts besteht die dargestellte Randwulststation aus einer Anzahl von Drückrollen, die teils angetriebene Rollen und teils Laufrollen sind. Im einzelnen läuft der Streifen 1 zwischen zwei Führungsrollen 5, von denen nur die obere sichtbar ist, durch, während an seinen Rändern zwei diese Ränder mit ihrer konischen Stirnfläche aufstellende Drückrollen 6 angreifen. Anschließende Drückrollen 7 drücken die aufgestellten Säume umgefaltet wieder auf den Streifen 1 nieder. In dieser Form wird der Streifen 1 an ein schon hergestelltes Schlauchstück 8, das aus der vorausgegangenen Länge des Streifens 1 besteht, die schon zu einer in Richtung eines Pfeils 9 rotierenden Wendel gewickelt ist, mit Hilfe eines Verbindungsbands 10 angeschlossen.A corresponding metal foil strip 1 is fed in accordance with a direction of movement 2 to a helical guide of known type (not shown in detail) which deflects the strip 1 onto a circular path with a longitudinal component, that is to say a helical path. Before the guide is reached, edge beads 4 of the strip 1 are formed in an edge bead station 3 by turning the edge over on both sides. To achieve this effect, the edge bead station shown consists of a number of pressure rollers, some of which are driven rollers and some of which are rollers. Specifically, the strip 1 runs between two guide rollers 5, of which only the upper one is visible, while at its edges two pressure rollers 6 which set up these edges engage with their conical end face. Subsequent pressure rollers 7 press the folded hems down onto strip 1 again. In this form, the strip 1 is connected to an already produced piece of hose 8, which consists of the previous length of the strip 1, which is already wound into a spiral rotating in the direction of an arrow 9, with the aid of a connecting band 10.

Nach Verlassen der Randwulststation 3 wird dem Streifen 1 also das Verbindungsband 10 zugeführt, und zwar im beschriebenen Beispiel in einer zur Ebene des Streifens 1 senkrechten Ebene. Dieses Verbindungsband 10 läuft zunächst durch eine Aufrauhstation 11 und wird dann in einer Umfaltstation 12 um einen der Ränder des Streifens 1 herumgefaltet, beim beschriebenen Beispiel um denjenigen Rand, der beim späteren Anschluß des Streifens 1 an das schon vorliegende Schlauchstück 8 dessen zunächst freies Ende bilden wird. Das Umfalten erfolgt beim beschriebenen Beispiel so, daß etwa ein Drittel des Verbindungsbands 10 auf der Unterseite liegt, während die doppelte Breite, nämlich zwei Drittel der Breite des Verbindungsbands 10 entlang der Oberseite des Metallfolienstreifens 1 verlaufen, auf die auch der Randwulst 4 gefaltet wurde. Der auf der Unterseite angeordnete Faltschenkel ist mit 13, der auf der Oberseite verlaufende insgesamt mit 14 bezeichnet. Die Umfaltstation 12 teilt nun ihrerseits bereits wieder den Faltschenkel 14 in zwei Hälften 15 und 16, von denen die Faltschenkelhälfte 16 etwas nach außen abstehend gebogen wird, um in einer späteren Station leichter ergriffen werden zu können. Die Anordnung der verschiedenen Drückrollen, die die Umfaltstation 12 bilden, bereitet dem Fachmann nach Darstellung des Faltprogramms keine Schwierigkeit.After leaving the edge bead station 3, the strip 1 is supplied with the connecting band 10, in the example described in a plane perpendicular to the plane of the strip 1. This connecting band 10 first runs through a roughening station 11 and is then folded in a folding station 12 around one of the edges of the strip 1, in the example described around that edge which, when the strip 1 is later connected to the already existing piece of hose 8, form its first free end becomes. The folding takes place in the case described game so that about a third of the connecting band 10 is on the underside, while the double width, namely two thirds of the width of the connecting band 10 run along the top of the metal foil strip 1, on which the bead 4 was also folded. The folding leg arranged on the underside is designated by 13, the one running on the top is designated overall by 14. The folding station 12 in turn already divides the folding leg 14 into two halves 15 and 16, of which the folding leg half 16 is bent slightly outwardly so that it can be gripped more easily in a later station. The arrangement of the various pressure rollers which form the folding station 12 is not difficult for the person skilled in the art after the folding program has been presented.

Die Station 12 ist im Verlauf der Zuführung des Streifens 1 zum Schlauchstück 8 dargestellt, sie könnte jedoch auch an dessen freiem Vorderrand liegen. Desgleichen ist es bei im wesentlichen übereinstimmender Funktion möglich, daß die Station am gegenüberliegenden Rand des Streifens 1 angreift und/oder daß das Breitenverhältnis der Faltschenkel 13 und 14 umgekehrt ist.The station 12 is shown in the course of the supply of the strip 1 to the tube piece 8, but it could also lie on the free front edge thereof. Likewise, if the function is essentially the same, it is possible for the station to engage on the opposite edge of the strip 1 and / or for the width ratio of the folding legs 13 and 14 to be reversed.

Der Streifen 1 wird nun an das bereits insoweit vorhandene Schlauchstück 8 als vorderste Windung angeschlossen, indem sich der nicht mit dem Verbindungsstreifen 10 umfaltete, in Fig. 1 rechts am Streifen 1 dargestellte Rand des Streifens 1 mit einem gewissen Überlappungsbereich innen an den bisher freien Rand der letzten Windung des Streifens 1 im Schlauchstück 8 anlegt. Dieser Rand ist derjenige, der eine gewisse Länge vorher mit dem Verbindungsstreifen 10 umfaltet worden ist, wobei die Faltschenkelhälfte 16 nach innen absteht. Der Knick zwischen den Faltschenkelhälften 15 und 16 stellt anschlagartig die Grenze der Überlappung zwischen dem Streifenmaterial der aufeinanderfolgenden Windungen dar. Das tangentiale Herankommen und innenseitige Anlegen des Materials des nachkommenden Streifens 1 erfolgt gemäß Fig. 1 an einem von der oberen Schlauchwand verdeckten Ort 17.The strip 1 is now connected to the already existing hose section 8 as the foremost turn, in that the edge of the strip 1 not shown with the connecting strip 10, shown on the right in the strip 1 in FIG. 1, with a certain overlap area on the inside to the previously free edge the last turn of the strip 1 in the tube piece 8. This edge is the one that has been folded over a certain length beforehand with the connecting strip 10, the folding leg half 16 projecting inwards. The kink between the folding leg halves 15 and 16 abruptly represents the limit of the overlap between the strip material of the successive turns. The tangential approach and inner application of the material of the following strip 1 takes place according to FIG. 1 at a location 17 hidden by the upper tube wall.

In einer nun folgenden Schließstation 19 wird die Faltschenkelhälfte 16 um den Streifenrand, der sich in den Winkel zwischen den Faltschenkelhälften 15 und 16 hineingelegt hat, umgelegt und wird die so geschaffene Schichtung 13 - 1,4 - 15 - 1,4 - 16 breitflächig oder entlang Linien zusammengepreßt. Durch eine Linienpressung kann bewirkt werden, daß die Randwülste 4 nicht vollkommen plattgewalzt werden, jedoch das Verbindungsband 10 ausreichend fest auf das Material des Streifens 1 drückt, um eine feste Verbindung zwischen den aufeinanderfolgenden Windungen zu ergeben.In a closing station 19 that follows, the folding leg half 16 is folded around the edge of the strip that has laid itself in the angle between the folding leg halves 15 and 16 and the stratification thus created becomes 13-1.4-15-1.4-16 over a wide area or pressed together along lines. A line pressure can ensure that the edge beads 4 are not completely rolled flat, but that the connecting band 10 presses sufficiently firmly on the material of the strip 1 to give a firm connection between the successive turns.

Im Fall, daß die Umfaltstation 12 sich im Vergleich zur Ausführung nach Fig. 1 am gegenüberliegenden Rand des Streifens 1 befindet, wird dieser so an die letzte Windung angelegt, daß deren freier Rand sich in den Winkel zwischen den Faltschenkelhälften 15 und 16 am einlaufenden Streifen legt. Dies kann insbesondere dann vorteilhaft sein, wenn die beabsichtigte Überlappung verhältnismäßig groß und damit der Faltschenkel 16 breit ist, da in diesem Fall die Station 19 sogleich am Ort 17 des Einlaufens des Streifens 1 in die Schlauch-Runddrehung vorgesehen werden kann und es hinsichtlich der nach innen oder außen abstehenden Faltschenkelhälfte 16 keine Schwierigkeiten gibt, die sich in der Rundanordnung durch Zug- oder Druckspannungen in diesem Schenkel aufgrund des im Vergleich zur Schlauchmantelfläche geänderten Durchmessers ergeben können.In the event that the folding station 12 is compared to the embodiment of FIG. 1 on the opposite edge of the strip 1, this is applied to the last turn so that its free edge is in the angle between the folding leg halves 15 and 16 on the incoming strip sets. This can be particularly advantageous if the intended overlap is relatively large and thus the folding leg 16 is wide, since in this case the station 19 can be provided immediately at the point 17 where the strip 1 enters the tube rotation and it does so in terms of inside or outside protruding folding leg half 16 are no difficulties that can arise in the circular arrangement due to tensile or compressive stresses in this leg due to the changed diameter compared to the hose jacket surface.

Fig. 1 zeigt die Station 19 erst eine Strecke weit nach der Herstellung der Windungsüberlappung. Tatsächlich wird indessen auch bei am Schlauchstückende umlaufenden Verbindungsband 10 diese Station 19 zweckmäßigerweise unmittelbar am Zusammenlaufort 17 angeordnet.1 shows station 19 only a distance far after the winding overlap has been established. In fact, this station 19 is also expediently arranged directly at the meeting point 17 even with the connecting band 10 running around the end of the hose section.

Fig. 2 zeigt aufeinanderfolgende Bearbeitungsschritte bei der Herstellung des Schlauchs. In einem Stadium a sind der Streifen 1 und das Verbindungsband 10 noch unmittelbar im Zustand, wie sie von den jeweiligen Vorratsspulen abgespult worden sind. Im Stadium b ist der Streifen 1 bereits mit Randwülsten 4 versehen und befindet sich das Verbindungsband 11 bereits im Zustand des Gefaltetwerdens, wobei bereits der Knick zwischen den Faltschenkeln 13 und 14 sichtbar ist. Stadium c zeigt den Faltschenkel 14 wiederum in seinen Faltschenkelhälften 15 und 16 durch einen Knick unterteilt. Im Stadium d ist der freie Rand des hereinkommenden Streifens 1 oder der Endwindung des schon hergestellten Schlauchstücks 8 auf die Faltschenkelhälfte 15 aufgelegt, und im Stadium e ist die Faltschenkelhälfte 16 wiederum auf diesen Rand des Streifen 1 niedergefaltet.Fig. 2 shows successive processing steps in the manufacture of the hose. In a stage a, the strip 1 and the connecting band 10 are still immediately in the state in which they were unwound from the respective supply spools. In stage b, the strip 1 is already provided with edge beads 4 and the connecting band 11 is already in the state of Folding, whereby the crease between the folding legs 13 and 14 is already visible. Stage c shows the folding leg 14 again divided into its folding leg halves 15 and 16 by a kink. In stage d the free edge of the incoming strip 1 or the end turn of the tube piece 8 already produced is placed on the folding leg half 15, and in stage e the folding leg half 16 is again folded down onto this edge of the strip 1.

Fig. 3 zeigt eine schematische Darstellung des Verbindungsorts benachbarter Windungen in einer Darstellung ähnlich Fig. 2e, wobei auch noch Pfeile 21 Preßrichtungen angeben. In Fig. 3 sind die Streifen 1 nicht mit Randwülsten 4 versehen, die Pressung entsprechend den Pfeilen 21 muß hier sehr stark sein, um einen festen Zusammenschluß der Materialien zu erzielen.FIG. 3 shows a schematic representation of the connection location of adjacent turns in a representation similar to FIG. 2e, wherein arrows 21 also indicate pressing directions. In Fig. 3 the strips 1 are not provided with edge beads 4, the pressure according to the arrows 21 must be very strong here in order to achieve a firm connection of the materials.

Gemäß Fig. 4 sind die Randwülste 4 vorhanden. Die Pressung (Pfeile 21) erfolgt entlang einer Linie parallel zu den Randwülsten, wodurch die im Querschnitt etwa S-förmige Konfiguration des Verbindungsbands 10 im Mittelbereich einen zusammengepreßten Streifen aufweist, dessen Dicke praktisch der Summe der Dicken der Materiallagen ist.4, the edge beads 4 are present. The pressing (arrows 21) takes place along a line parallel to the edge beads, as a result of which the cross-sectionally approximately S-shaped configuration of the connecting band 10 has a compressed strip in the central region, the thickness of which is practically the sum of the thicknesses of the material layers.

Fig. 5 zeigt eine andere Form der Randbearbeitung des Streifens 1. Es handelt sich hierbei um eine Aufbiegung des Rands oder auch um eine Umbördelung. Bei einer Pressung im Bereich dieser Aufbiegung oder dieser Umbördelung ergibt sich der Effekt, daß die umgebogene Kante des Streifens 1 sich am Verbindungsband 10 festhakt.Fig. 5 shows another form of edge processing of the strip 1. This is a bending of the edge or a flanging. When pressing in the region of this bend or flanging, the effect is that the bent edge of the strip 1 hooks onto the connecting band 10.

Fig. 6 veranschaulicht schließlich eine abgewandelte Randwulstbildung, nämlich beiderseits in unterschiedlicher Richtung.6 finally illustrates a modified edge bead formation, namely on both sides in a different direction.

Fig. 7 zeigt die Schließstation 19 in schematischem Querschnitt für den Fall eines aus zwei flexiblen Streifen aufgebauten Schlauchs, bei dem sich jeweils eine Innenwendel und eine Außenwendel abwechseln. Die Station 19 erstreckt sich hierbei über zwei Preßstellen im Abstand eines Wendelschritts, die unter Verwendung von Rollen die Pressung der schraubenlinig verlaufenden Verbindungslinien zwischen dem Streifenmaterial aufeinanderfolgender Windungen in zwei Schritten durchführen, von denen der erste im wesentlichen die Umfaltung der Faltschenkelhälfte 16 und der zweite die Pressung entlang zwei Linien durchführt.FIG. 7 shows the closing station 19 in a schematic cross section for the case of a hose constructed from two flexible strips, in which an inner spiral and an outer spiral alternate. The station 19 extends over two pressing points at a distance of one spiral step, the below Using rollers, the helical connecting lines between the strip material of successive turns are pressed in two steps, the first of which essentially folds the folded leg half 16 and the second presses along two lines.

Bei der °Verfahrensdurchführung nach Fig. 8 wird derjenige Rand, der dem mit dem Verbindungsband 10 belegten Rand gegenüberliegt, durch ein besonderes Saumband 25 eingefaßt. Das Saumband 25 ist ein dünner Folienstreifen, der zunächst in einer zur Zuführebene des Streifens 1 rechtwinkligen Ebene herangeführt und um die Kante des Streifens 1 herumgebogen wird. Die Streifenkante ist damit gut geschützt, sie neigt auch bei leicht einreißender dünner Metallfolie nicht zum Ausfransen. An der schraubenlinig um den fertigen Schlauch laufenden Verbindungsrippe liegt örtlich das Material also in sieben Lagen, da zu den früher beschriebenen fünf Lagen noch die zwei durch die U-Schenkel des Saumbands 25 gebildeten Lagen hinzukommen. In nicht dargestellter Weise könnte auch die gegenüberliegende Kante analog eingesäumt werden, bevor der Verbindungsstreifen aufgelegt wird, insbesondere, wenn der Verbindungsstreifen erst nach einem gewissen Umlaufwinkel im Schraubenbereich aufgebracht wird.In the process ° feedthrough according to FIG. 8 one edge which lies opposite the space occupied by the connecting band 10 edge, bordered by a special seam band 25th The seam band 25 is a thin film strip, which is first brought up in a plane perpendicular to the feed plane of the strip 1 and is bent around the edge of the strip 1. The edge of the stripe is well protected and does not tend to fray, even if the thin metal foil tears easily. At the connecting rib running in a screw line around the finished hose, the material is thus in seven layers, since in addition to the five layers described earlier, the two layers formed by the U-legs of the hem band 25 are added. In a manner not shown, the opposite edge could also be hemmed in an analog manner before the connecting strip is put on, in particular if the connecting strip is only applied after a certain circumferential angle in the screw region.

In der Wendelführung (Fig. 1) wird im Bereich der ersten Windung oder der ersten Windungen des Schlauchstücks 8 das Streifenmaterial durch mehrere im Kreis angeordnete Führungen zur Durchführung seines Rundlaufs geführt. Das Schlauchstück 8 läuft auf einem Führungsbett in Richtung eines Pfeils 22 entsprechend der Herstellungsgeschwindigkeit weiter und wird später von Drückrollen 23, von denen jeweils ein Paar oder auch mehrere Paare mit Achsen in zwei aufeinander senkrechten Richtungen tangential zum Schlauchstück 8 angeordnet sind, zu einem rechteckigen Querschnitt gedrückt, um auf diese Weise für ein feuerfestes Flachkanal-Lüftungssystem verwendbar zu sein. Die Drückrollen 23 können auch in einem separaten Arbeitsgang nach Abtrennung des hergestellten Schlauchs von der Wendelführung nach Fig. 1 am Schlauch angreifen, um konstruktive Schwierigkeiten zu vermeiden, die sich aus der Rotation des Schlauchs um seine Längsachse während seines Wickelns ergeben. Wird der hergestellte Schlauch nur ein Stück weit durch die Paare der Drückrollen 23 geschoben, so entsteht ein Übergangsstück zwischen Rund- und Flachkanal.In the spiral guide (FIG. 1), in the area of the first turn or the first turns of the tube piece 8, the strip material is guided through a plurality of guides arranged in a circle in order to carry out its concentricity. The piece of hose 8 runs on a guide bed in the direction of an arrow 22 in accordance with the production speed and later becomes a rectangular cross section by pressure rollers 23, of which a pair or several pairs with axes are arranged tangentially to the piece of hose 8 in two mutually perpendicular directions pressed to be usable for a fire-proof flat duct ventilation system. The pressure rollers 23 can also act on the hose in a separate operation after the hose produced has been separated from the helical guide according to FIG. 1, in order to avoid constructional difficulties resulting from the rotation of the hose result in its longitudinal axis during its winding. If the tube produced is pushed only a little way through the pairs of pressure rollers 23, a transition piece is created between the round and flat channels.

Als weitere ergänzende Bearbeitung des hergestellten Schlauchs kann dieser auch seitlich gelocht und mit einem Aushalser ausgewändelt werden, wodurch ein Abzweigstück entsteht. Die beschriebenen Materialien für den Aluminiumfolienstreifen und das Aluminium-Verbindungsband lassen sich ohne große Schwierigkeiten entsprechend ausrändeln und ausweiten wie eine homogene Folienschlauchwand.As a further supplementary processing of the hose produced, it can also be perforated on the side and changed with a throat, creating a branch piece. The materials described for the aluminum foil strip and the aluminum connecting band can be knurled out and expanded like a homogeneous film tube wall without great difficulty.

Gemäß Fig. 11 wird der Metallfolienstreifen 1 in der Bewegungsrichtung 2 der Wendelführung zugeführt, die den Streifen 1 ebenfalls auf eine Kreisbahn mit Längskomponente, also eine Schraubenlinienbahn umlenkt. Vor Erreichen der Führung oder im Verlauf der geführten Wickelbewegung drücken Rollen 33 zwei rinnenartige Falten 34, die auf der Streifenaußenseite als Stege vorstehen, entlang den Rändern in den Streifen 1. Beim beschriebenen Beispiel schiebt die Wickelführung die Falte des nacheilenden Rands der vorausgehenden Windung in die Falte des voreilenden Rands der nachfolgenden Windung, so daß die Windungen sich also mit einem Randbereich überlappen, in dem die beiderseitigen Stege bzw. Falten ineinandergreifen. Dies ist in Fig. 1 an einer Eingriffstelle 34' angedeutet. Alternativ wäre es auch möglich, die rinnenartigen Falten 34 erst in der bereits gewickelten Anordnung im überlappenden Bereich aufeinanderfolgender Windungen für beide Windungen gleichzeitig herzustellen, wodurch sich der gegenseitige Eingriff der Falten 34 von selbst ergibt. Im Fall von Kunststoffolien kann es sich bei den Rollen 33 um geheizte Rollen handeln, die eine bleibende Formänderung bewirken.11, the metal foil strip 1 is fed in the direction of movement 2 of the helical guide, which likewise deflects the strip 1 onto a circular path with a longitudinal component, that is to say a helical path. Before reaching the guide or in the course of the guided winding movement, rollers 33 press two channel-like folds 34, which protrude as webs on the outside of the strip, along the edges in strip 1. In the example described, the winding guide pushes the fold of the trailing edge of the preceding turn into Fold of the leading edge of the subsequent turn, so that the turns overlap with an edge area in which the webs or folds on both sides interlock. This is indicated in Fig. 1 at an engagement point 34 '. Alternatively, it would also be possible to produce the channel-like folds 34 only in the already wound arrangement in the overlapping area of successive turns for both turns, whereby the mutual engagement of the folds 34 results automatically. In the case of plastic films, the rollers 33 can be heated rollers which bring about a permanent change in shape.

Das Verbindungsband ist bei dieser Ausführung ein U-Profil-Verbindungsband 35, das in einer Vorstation zum U-Profil gebogen ist und in die Falte der beiden Streifenwindungen eingesteckt wird. Die ineinanderliegenden rinnenartigen Falten 34 mit dem Verbindungsband 35 werden nun an einer Zusammendrückstation 36 durch Drückrollen 37, die in Pfeilrichtung auf die Falten 34 drücken, entlang der Kante ihres Ausbrechens aus der Fläche des Streifens 1 von beiden Seiten her zusammengedrückt, so daß ein etwa flaschenartiger Stegquerschnitt entsteht, der in der Zeichnung schematisch dreieckig dargestellt ist. Die Falten 34 sind somit zu einer Verbindungsstrukturlinie 38 umgestaltet, die in Schraubenlinienform um den Schlauch läuft und die einzelnen Windungen der Schlauchwendel zusammenhält.In this embodiment, the connecting band is a U-profile connecting band 35, which is bent to the U-profile in a preliminary station and is inserted into the fold of the two strip windings. The interlocking groove-like folds 34 with the Connecting tape 35 are now pressed together at a compression station 36 by pressing rollers 37, which press the folds 34 in the direction of the arrow, along the edge of their breaking out from the surface of the strip 1, so that an approximately bottle-like web cross section is produced, which is shown in the drawing is shown schematically triangular. The folds 34 are thus redesigned into a connecting structure line 38 which runs in a helical shape around the hose and holds the individual turns of the hose coil together.

Fig. 12 zeigt schematisch die Stufen einer etwas abgewandelten Herstellung des Schlauchs, nämlich mit zwei unterschiedlich breiten Streifen 1' aus Material geringerer Steifigkeit und 1" aus Material etwas höherer Steifigkeit. Die steiferen Streifen 1" sind schmaler.12 schematically shows the stages of a somewhat modified manufacture of the hose, namely with two strips 1 'of different material with a lower stiffness and 1 "of material with a somewhat higher stiffness. The stiffer strips 1" are narrower.

In Fig. 12 zeigt der Zustand a) die zuzuführenden drei Materialien, nämlich die Streifen 1' und 1", jeweils nach der ersten Faltung, und zwei Bänder 35 etwas höherer Steifigkeit, die zu der in Fig. 12 im Zustand a) dargestellten U-Querschnittsform mit Längsflanschen an den Schenkelenden geform worden sind. Im Zustand b), der aufeinanderfolgende Windungen veranschaulicht, sind bereits die Falten 34, der Streifen 1' und 1" ineinandergesetzt, und zwar so, daß die Falten des Streifens 1' stets die Innenfalten und die Falten des Streifens 1" stets die Außenfalten bilden. Gemäß Zustand c) wird nun aufeinanderfolgend zunächst noch das Band 35 mit U-Querschnitt eingesteckt, und sodann werden an der Zusammendrückstation 36 wieder die Halslinien der Falten 34 nach innen gedrückt, so daß wieder der flaschenartige Querschnitt entsteht, der die Verbindungsstrukturlinie 38 ergibt, die bei der nächsten Windung dargestellt ist. Bei dieser Ausführungsform laufen zwei Wendeln von Verbindungstrukturlinien 38 parallel zueinander um den Schlauch. Das Band 35 soll bei der Herstellung nach Fig. 12 die Innenfalte bilden, die das Herausschlupfen der darum herumliegenden nunmehrigen Mittelfalte verhindert, während die Außenfalte aus dem Streifen 1" gebildet wird, der hier ausreichend steif ist, um einen Klammereffekt zu erfüllen. Der Querschnitt zeigt einen Hals 39.In FIG. 12, state a) shows the three materials to be fed, namely strips 1 'and 1 ", each after the first folding, and two strips 35 of somewhat higher rigidity, which correspond to the U shown in FIG. 12 in state a) In the state b), which illustrates successive turns, the folds 34, the strips 1 'and 1 "have already been set into one another, so that the folds of the strip 1' are always the inner folds and the folds of the strip 1 "always form the outer folds. According to state c), the band 35 with a U-cross section is now inserted one after the other, and then the neck lines of the folds 34 are pressed inwards again at the compression station 36, so that again the bottle-like cross-section arises which results in the connection structure line 38, which is shown in the next turn, in this embodiment two coils of connection structure line run n 38 parallel to each other around the hose. In the production according to FIG. 12, the band 35 is intended to form the inner fold, which prevents the present middle fold from slipping out, while the outer fold is formed from the strip 1 ", which is here sufficiently rigid to achieve a clamping effect. The cross-section shows a neck 39.

In Fig. 12 zeigt also der Zustand b), wie die Falten des weicheren Streifens 1' in die Falten des härteren Streifens 1" eingesetzt worden sind, während gemäß den Zuständen c) zunächst noch das Band 35 in seiner gefalteten Form eingeführt wird, an der Zusammendrückstation 36 von den Drückrollen 37 zum Flaschenquerschnitt geformt wird und dann die Verbindungsstrukturlinie 38 bildet, mit einer speziellen, aus dem im übrigen keinen Teil der Schlauchwand darstellenden Band 35 gebildeten Innenfalte 43, einer dem weicheren Streifen 1' angehörenden Mittelfalte 44 und einer dem steiferen Streifen 1" angehörenden Außenfalte 45.In FIG. 12, the state b) shows how the folds of the softer strip 1 'have been inserted into the folds of the harder strip 1 ", while according to the states c) the band 35 is first inserted in its folded form the compression station 36 is formed by the pressure rollers 37 into a bottle cross-section and then forms the connecting structure line 38, with a special inner fold 43 formed from the band 35, which otherwise does not form part of the hose wall, a middle fold 44 belonging to the softer strip 1 'and one which is more rigid Stripe 1 "belonging outer fold 45.

In Fig. 12 ist der Vorgang so dargestellt, daß das Band 35 zuerst gefaltet und dann in die Falten 34 der Streifen 1' und 1" eingeschoben wird. Es ist auch möglich, das Band 35 mit Hilfe einer Drückrolle in die Falten 34 der Streifen 1' und l" einzuführen, wobei diese Drückrolle zugleich den U-Querschnitt des Bands 35 herstellt.In Fig. 12 the process is illustrated in such a way that the band 35 is first folded and then inserted into the folds 34 of the strips 1 'and 1 ". It is also possible to press the band 35 into the folds 34 of the strips with the aid of a pressure roller 1 'and 1 "to be introduced, this spinning roller also producing the U-cross section of the belt 35.

Fig. 13 zeigt die Herstellung eines Schlauchs wiederum aus Schlauchmaterial einer - mit Ausnahme der Verbindungsstrukturlinien - einheitlichen Beschaffenheit, jedoch mit flexiblerem Material als dem des Streifens 1" gemäß Fig. 12. Es sei angenommen, daß der Folienstreifen 1 von hoher Biegsamkeit verarbeitet wird, der beispielsweise aus einer mit Glasfasergewebe kaschierten dünnen Aluminiumfolie oder auch aus einer Kunststoffolie bestehen kann. In diesem Fall werden sowohl ein Band 46 als auch das Band 35 zusätzlich benötigt, um eine Verbindungsstrukturlinie ausreichender Festigkeit zu erzielen. Fig. 13a) zeigt die Zustände der herangeführten Streifen und Bänder, wobei speziell beim weichen Streifen 1 die Falten 34 leicht auch erst nach der Herstellung der Überlappung der Randbereiche gemeinsam geformt werden können. Zustand b) zeigt die Ineinanderfügung der Falten 34 des Streifens 1, woraufhin an die ineinanderliegenden Falten die gegebenenfalls ebenfalls schon vorgefalteten Bänder 35 und 46 herangeführt werden. Der Zustand c) deutet die Formänderung an der Zusammendrückstation 36 aufgrund der Drückrollen 37 an, woraufhin als Verbindungsstrukturlinie 38 eine vierlagige Falte entsteht, mit einer Innenfalte 48 aus dem Material des Verbindungsbands 35, einer Mittelfalte 49 und einer Außenfalte 50 aus dem Material des Streifens 1 und einer äußeren Klammer, die durch das Band 46 gebildet wird.FIG. 13 shows the production of a hose again from hose material of a uniform nature, with the exception of the connecting structure lines, but with a more flexible material than that of the strip 1 "according to FIG. 12. It is assumed that the film strip 1 is processed with great flexibility, which can consist, for example, of a thin aluminum foil laminated with glass fiber fabric or also of a plastic film In this case, both a band 46 and the band 35 are additionally required in order to achieve a connecting structure line of sufficient strength Stripes and tapes, especially in the case of the soft stripe 1, the folds 34 can easily be formed together only after the overlap of the edge regions has been produced. Condition b) shows the folds 34 of the strip 1 being joined together, whereupon the folds lying one inside the other may also already be pre-folded tapes 35 and 46 are introduced. State c) indicates the change in shape at the compression station 36 due to the pressure rollers 37, whereupon a four-layer fold as the connecting structure line 38 arises, with an inner fold 48 made of the material of the connecting band 35, a middle fold 49 and an outer fold 50 made of the material of the strip 1 and an outer clip which is formed by the band 46.

Diese Strukturlinie 38 ist in Fig. 14 nochmal in vergrößertem Maßstab schematisch im Querschnitt dargestellt. Wie bereits vorher, ist die querschnittsmäßig flaschenförmige, an sich schraubenlinig umlaufende Struktur schematisiert etwa dreieckig dargestellt. Die verschiedenen Lagen sind mit gegenseitigem Abstand dargestellt, um sie in der Zeichnung voneinander unterscheiden zu können, tatsächlich sind sie jedoch im Bereich des Halses 39 stramm aneinandergepreßt. Das Band 35 weist außer der Innenfalte 48 noch Flansche 51 auf, die außen an der Fläche der Streifen 1 entlangliegen. In Übereinstimmung mit Fig. 11 steht die so gebildete Strukturlinie 38 aus der Schlauchwand nach außen vor, so daß also der Eindruck einer Wendelrippe entsteht. Für die Funktion des Schlauchs ist es auch möglich, daß die Falte in das Schlauchinnere vorsteht.This structure line 38 is shown again schematically in cross section in FIG. 14 on an enlarged scale. As already before, the cross-sectionally bottle-shaped structure, which is per se helically encircling, is shown schematically as approximately triangular. The different layers are shown at a mutual distance in order to be able to distinguish them from one another in the drawing, but in fact they are tightly pressed together in the region of the neck 39. In addition to the inner fold 48, the band 35 also has flanges 51 which lie on the outside of the surface of the strips 1. In accordance with FIG. 11, the structural line 38 thus formed protrudes outward from the hose wall, so that the impression of a helical rib is created. For the hose to function, it is also possible for the fold to protrude into the inside of the hose.

Die Innenfalte 48 verhindert, wie dargelegt, daß sich die Mittelfalte 49 und die Außenfalte 50 bei Zug zusammenschnüren und aus dem Hals 39 herausschlupfen. Diese Funktion erfüllt die Innenfalte 48 dadurch, daß sie eine Faltstruktur hat, die im Fall eines Drucks auf den Hals 39 aufgrund ihrer Verformbarkeit und ihrer Größe nicht dazu neigt, eine Keilwirkung auf den Hals 39 auszuüben und ihn aufzuweiten.The inner fold 48 prevents, as explained, that the middle fold 49 and the outer fold 50 constrict when pulled and slip out of the neck 39. The inner fold 48 fulfills this function in that it has a fold structure which, in the event of pressure on the neck 39, does not tend to wedge and expand the neck 39 due to its deformability and its size.

Überstehende Ränder 52 der beiden Windungen des Streifens 1 tragen andererseits dazu bei, daß die Falten 49 und 50 auch nicht in Längsrichtung des Schlauchs, um die Innenfalte 48 herumgleitend, aus der Falte herausgezogen werden. Dies wird weiterhin durch das stramme Aneinanderliegen der verschiedenen Lagen im Bereich des Halses 39 verhindert.Protruding edges 52 of the two turns of the strip 1, on the other hand, help to ensure that the folds 49 and 50 are not pulled out of the fold in the longitudinal direction of the hose, sliding around the inner fold 48. This is further prevented by the tight contact of the various layers in the area of the neck 39.

Fig. 15 zeigt eine den Gesamtaufbau nach Fig. 13 und 14 verwendende Struktur, die jedoch eine abgewandelte Innenfalte besitzt. Diese Innenfalte ist in Form einer lockeren randwulstartigen Rolle gestaltet, die aus dem Band 35 hergestellt wird und in die ineinandergelegten Falten des Streifens 1 eingesetzt wird. Nach dem Zusammendrücken unter Bildung des Halses 39 stellt auch diese Faltstruktur ein Hindernis für ein Herausschlupfen der übrigen Falten dar. Der Aufbau nach Fig. 14 wird indessen aus herstellungstechnischen Gründen bevorzugt.FIG. 15 shows a structure using the overall structure according to FIGS. 13 and 14, but which has a modified inner fold. This inner fold is in the form of a loose rim bead term role designed, which is made from the tape 35 and is used in the nested folds of the strip 1. After being compressed to form the neck 39, this folding structure also represents an obstacle to the other folds slipping out. The structure according to FIG. 14 is, however, preferred for reasons of production technology.

Fig. 16 zeigt wiederum eine abgewandelte Faltenform, bei der, ausgehend von der Verbindungsbildung nach Fig. 13, insgesamt eine längere Falte gebildet wurde, die vor dem Aufziehen des Bands 45 nochmal insgesamt umgeknickt wird, so daß der Reibungsbereich des Halses 39 verlängert ist. Die Fig. 16 zeigt die durch das Band 45 gebildete Klammer nicht voll zugedrückt, so daß die verschiedenen Lagen der Falte einzeln sichtbar sind. Zur Herstellung der Verbindung zwischen den Schlauchwindungen wird das Band 45 jedoch weitmöglichst zugedrückt.Fig. 16 again shows a modified fold shape, in which, starting from the connection formation according to Fig. 13, a longer fold was formed overall, which is folded over again before the tape 45 is pulled open, so that the frictional area of the neck 39 is extended. Fig. 16 shows the clip formed by the band 45 not fully pressed, so that the different positions of the fold are individually visible. To establish the connection between the hose turns, however, the band 45 is pressed as far as possible.

Gemäß einer nicht dargestellten Faltenbildung können die überstehenden Ränder 52 der Streifen auch fehlen, insbesondere im Fall eines etwas rauhen Streifenmaterials. Die Streifenränder liegen dann etwa im Bereich des Halses 39. Es ist auch möglich, nur denjenigen Streifen seitlich im Bereich des Halses 39 enden zu lassen, der dem Schlauchinneren zugewandt ist. Man erzielt durch eine solche Herstellung den Vorteil, daß sich nicht der entsprechende Rand 52 aufstellen und als Strömungsbremse in den Schlauch vorstehen kann.According to a fold formation, not shown, the protruding edges 52 of the strips may also be missing, particularly in the case of a somewhat rough strip material. The strip edges then lie approximately in the region of the neck 39. It is also possible to leave only the strip laterally in the region of the neck 39 which faces the tube interior. The advantage of such a production is that the corresponding edge 52 cannot be erected and can protrude into the hose as a flow brake.

Die aus dem flexiblen Material der Streifen 1 hergestellten Schläuche haben eine sehr hohe Zusammendrückbarkeit. Sie können beispielsweise vollkommen zusammengedrückt unter minimalem Volumenaufwand transportiert und an der Baustelle wieder auseinandergezogen werden.. Die Querschnittsform der Schläuche kann unter bleibender Formänderung der Verbindungsstrukturlinie(n) 8 an vorhandene Bedürfnisse angepaßt werden.The hoses made from the flexible material of the strips 1 have a very high compressibility. For example, they can be completely compressed and transported with minimal volume and pulled apart again at the construction site. The cross-sectional shape of the hoses can be adapted to existing requirements while the shape of the connecting structure line (s) 8 is permanently changed.

Claims (11)

1. Verfahren zum Herstellen eines gewendelten Schlauchs, bei dem man einen oder mehrere flexible Streifen (1,1',1") in eine schraubenlinige Anordnung aufeinanderfolgender Windungen bringt, indem man die jeweiligen Streifen für den Anschluß an ein schon vorhandenes relativ um seine Längsachse rotierendes gewendeltes Schlauchstück (8) von einem Streifenvorrat her zuführt und hierdurch den Schlauch stetig verlängert, wobei man das Streifenmaterial benachbarter Windungen beiderseits entlang einem Randbereich aneinander annähert und dann die benachbarten Windungen in diesem Randbereich miteinander unter Zuführung eines zusätzlichen, einen mechanischen Halt zwischen den benachbarten Windungen herstellenden Verbindungsbands (10,35) verbindet, dadurch gekennzeichnet, daß man die Streifen (1,1',1") im gegenseitigen Randbereich einander überlappen läßt und das zugeführte Verbindungsband (10,35) im Überlappungsbereich durch Faltung so anbringt, daß es wenigstens am einen der sich überlappenden Randbereiche im Sinne von dessen Festlegung gegenüber dem anderen der sich überlappenden Randbereiche angreift.1. A method of manufacturing a coiled tube, in which one or more flexible strips (1,1 ', 1 ") are brought into a helical arrangement of successive turns by making the respective strips for connection to an already existing one relative to its longitudinal axis rotating coiled piece of hose (8) feeds from a strip supply and thereby continuously lengthens the hose, whereby the strip material of adjacent turns is brought closer to one another on both sides along an edge area and then the adjacent turns in this edge area with each other with the addition of an additional mechanical hold between the adjacent ones Connecting tape (10,35) producing turns, characterized in that the strips (1,1 ', 1 ") are allowed to overlap in the mutual edge area and the supplied connecting tape (10,35) is attached in the overlap area by folding so that it at least on one of the overlapping Ra nd areas in the sense of its definition against the other of the overlapping edge areas. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man aufeinanderfolgend diese Verfahrensschritte durchführt: a) man faltet das Verbindungsband (10) um eine der Längskanten des jeweiligen, zum Anschließen an das schon vorhandene Schlauchstück (8) zugeführten Streifens (1) so, daß ein Faltschenkel (14) des Verbindungsbands auf der Streifenoberseite und ein Faltschenkel (13) auf der Streifenunterseite mit dem Streifen mitläuft und also dort eine dreifache Schichtung, nämlich Verbindungsband - Streifenmaterial - Verbindungsband, vorliegt; b) man legt den zu überlappenden Randbereich des Streifens an den freien Randbereich der Endwindung des schon vorhandenen Schlauchstücks (8) so an, daß eines der beiden Streifenmaterialien - zugeführter Streifen oder Endwindung - am einen (14) der Faltschenkel des Verbindungsbands (10), das am anderen dieser Streifenmaterialien sitzt, über einen Teil (15) der Breite dieses Faltschenkels anliegt, was man am Beginn oder im Verlauf der Rundbiegung des Streifens (1) und der überlappenden Anlage an das Streifenmaterial der Endwindung unter Bildung der nächsten Windung durchführt, woraufhin also ein Längsbereich (16) dieses so teilweise abgedeckten Faltschenkels (14) freibleibt und am überdeckten Teil (15) dieses Verbindungsbands (10) eine vierfache Schichtung, nämlich Verbindungsband - Streifenmaterial der einen Windung - Verbindungsband - Streifenmaterial der nächsten Windung, vorliegt; c) man faltet den freigebliebenen Teil (16) des Faltschenkels (14) um die Längskante des angelegten Streifenmaterials auf dieses Streifenmaterial nieder, woraufhin dort also eine fünffache Schichtung, nämlich Verbindungsband - Streifenmaterial der einen Windung - Verbindungsband - Streifenmaterial der nächsten Windung - Verbindungsband, vorliegt; d) und man preßt diese entstandene fünffache Schichtung in Normalrichtung zur Flächenausdehnung des Streifenmaterials und des Materials des Verbindungsbands zur Erzeugung eines festen Materialverbunds zusammen. 2. The method according to claim 1, characterized in that one carries out these process steps in succession: a) the connecting band (10) is folded around one of the longitudinal edges of the respective strip (1) supplied for connection to the already existing piece of hose (8) such that a folding leg (14) of the connecting band on the top of the strip and a folding leg (13) runs on the underside of the strip with the strip and there is therefore a triple layering, namely connecting strip - strip material - connecting strip; b) the edge region of the strip to be overlapped is placed on the free edge region of the end turn of the already existing tube piece (8) in such a way that one of the two strip materials - supplied strip or end turn - on one (14) of the folding leg of the connecting band (10), which sits on the other of these strip materials, lies over a part (15) of the width of this folding leg, which is carried out at the beginning or in the course of the round bend of the strip (1) and the overlapping contact with the strip material of the end turn to form the next turn, whereupon So a longitudinal region (16) of this partially covered folding leg (14) remains free and on the covered part (15) of this connecting tape (10) there is a fourfold layering, namely connecting tape - strip material of one turn - connecting tape - strip material of the next turn; c) the part (16) of the folding leg (14) which is left free is folded down around the longitudinal edge of the strip material applied to this strip material, whereupon there is a five-fold layering, namely connecting strip - strip material of one turn - connecting strip - strip material of the next turn - connecting strip, is present; d) and this resulting five-fold layering is pressed together in the normal direction to expand the area of the strip material and the material of the connecting tape to produce a firm material composite. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß man die beiderseitigen Ränder des bzw. der Streifen(s) (1), jeweils vor dem Drumherumfalten des Verbindungsbands (10), aufbiegt.3. The method according to claim 2, characterized in that one bends the mutual edges of the strip (s) (1), in each case before folding around the connecting tape (10). 4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß man denjenigen Randbereich des Streifens (1), der dem aufgebrachten Verbindungsband (10) gegenüberliegt, vor Erreichen des schraubenlinig rotierenden Bereichs mit einem Saumband (25) einsäumt.4. The method according to claim 2 or 3, characterized in that the edge region of the strip (1), which is opposite the applied connecting tape (10), is hemmed with a hem tape (25) before reaching the helically rotating area. 5. Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß man die Oberfläche des Verbindungsbands (10) und/oder des Saumbands in Bereichen, in denen es in Anlage an das Material des Streifens (1) kommt, zuvor aufrauht (bei 11).5. The method according to any one of claims 2 to 4, characterized in that the surface of the connecting band (10) and / or the hem band in areas in which it comes into contact with the material of the strip (1) is previously roughened (at 11). 6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man in die Streifen (1,1',1") im überlappenden Randbereich eine gemeinsame, aus der umlaufenden Fläche der Streifen in den Windungen herausgerichtete, in dem bzw. den Streifen schraubenlinig verlaufende Falte (34) bildet, in die man eine ebenso verlaufende innere Falte (43,48) aud dem aus steifem, aber biegbarem Bandmaterial bestehenden Verbindungsband (35) einlegt, und daß man an den Linien des Heraustretens aus der Fläche der Streifen die äußere Falte mit der darin liegenden inneren Falte zusammendrückt.6. The method according to claim 1, characterized in that in the strips (1,1 ', 1 ") in the overlapping edge region, a common, from the circumferential surface of the strip in the turns, in the or the strip helically running fold (34), into which an inner fold (43, 48), which extends in the same way, is inserted from the connecting band (35), which is made of stiff but bendable strip material, and that the outer fold is included in the lines emerging from the surface of the strips of the inner fold in it. 7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß man die Falte von außen her mit einem im Querschnitt U-förmig gebogenen steiferen Band (35) einfaßt, das man dann an seinen freien Schenkelkanten unter Zwischenlage der Falte zusammendrückt (durch 37).7. The method according to claim 6, characterized in that one encloses the fold from the outside with a cross-sectionally U-shaped bent stiffer band (35), which is then compressed at its free leg edges with the fold in between (by 37). 8. Gewendelter Schlauch aus wenigstens einem Metallfolienstreifen (1), der in Windungen liegt, die sich mit den jeweiligen Nachbarwindungen und mit einem Verbindungsband entlang einem Randbereich überlappen, dadurch gekennzeichnet, daß der bzw. die Streifen (1) entlang ihren Rändern aus der Streifenfläche vorstehende Biegebereiche (4) aufweisen und die sich überlappenden Randbereiche von zwei Seiten in beiderseitige Taschen eines mit umlaufenden und im Schlauch-Längsschnitt S-förmig um die Randbereiche verlegten Verbindungsbands (10), das in Radialrichtung des Schlauchs einschließlich der eingesteckten Randbereiche entlang umlaufenden Linien zusammengepreßt ist, eingesteckt sind.8. Coiled tube made of at least one metal foil strip (1) which lies in windings which overlap with the respective neighboring windings and with a connecting band along an edge region, characterized in that the strip or strips (1) along their edges from the strip surface have protruding bending areas (4) and the overlapping edge areas from two sides in pockets on both sides, one with circumferential and in the tube length cut in an S-shape around the edge areas of the connecting band (10), which is pressed together in the radial direction of the hose, including the inserted edge areas, along circumferential lines. 9. Schlauch nach Anspruch 8, dadurch gekennzeichnet, daß einer der in die Taschen des Verbindungsbands (10) eingesteckten Randbereiche des Streifens (1) durch ein im Querschnitt U-förmiges Saumband (25) eingefaßt ist.9. Hose according to claim 8, characterized in that one of the edge areas of the strip (1) inserted into the pockets of the connecting band (10) is bordered by a cross-sectionally U-shaped seam band (25). 10. Gewendelter Schlauch aus wenigstens einem Metallfolienstreifen (1,1',1"), der in Windungen liegt, die sich mit den jeweiligen Nachbarwindungen und mit einem Verbindungsband entlang einem Randbereich überlappen, dadurch gekennzeichnet, daß im Überlappungsbereich randparallel verlaufende gemeinsame Falten (38;44,45,49,50) einen - querschnittmäßig gesehen - zugedrückten Halsbereich (39) und in der Falte verlaufend eine durch das Verbindungsband (35), das aus steifem, aber biegsamem Material besteht, gebildete Innenfalte (43,48) aufweisen.10. Coiled tube made of at least one metal foil strip (1, 1 ', 1 ") which lies in windings which overlap with the respective neighboring windings and with a connecting band along an edge region, characterized in that common folds (38 ; 44,45,49,50) have a - seen in cross-section - the neck region (39) pressed down and running in the fold an inner fold (43,48) formed by the connecting band (35), which consists of a stiff but flexible material. 11. Schlauch nach Anspruch 10, dadurch gekennzeichnet, daß die gemeinsamen Falten (38) aus dem Schlauch nach außen vorstehen und außen von einem sie schraubenlinig umlaufenden Klammerband (46) überdeckt sind, das die Falten umgreift und dessen Kanten unter Einschluß des Halsbereichs (39) der Falten gegeneinandergepreßt sind.11. Hose according to claim 10, characterized in that the common folds (38) protrude outward from the hose and are covered on the outside by a helical circumferential band of clips (46) which engages around the folds and the edges of which include the neck region (39 ) the folds are pressed against each other.
EP19820106873 1981-07-31 1982-07-29 Method of manufacturing a coiled flexible tube, and coiled flexible tube Expired EP0071273B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106873T ATE16361T1 (en) 1981-07-31 1982-07-29 METHOD OF MAKING A COILED HOSE AND COILED HOSE.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3130323 1981-07-31
DE19813130323 DE3130323A1 (en) 1981-07-31 1981-07-31 Process for producing a coiled hose, and coiled hose
DE3202516 1982-01-27
DE3202516 1982-01-27
DE19823204244 DE3204244A1 (en) 1982-01-27 1982-02-08 METHOD FOR PRODUCING A COILED HOSE AND COILED HOSE
DE3204244 1982-02-08

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EP0071273A1 true EP0071273A1 (en) 1983-02-09
EP0071273B1 EP0071273B1 (en) 1985-11-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114613A1 (en) * 1983-01-24 1984-08-01 Friedrich Bürcher Coiled flexible tube

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT54473B (en) * 1910-10-14 1912-07-25 Jan Rysanek Process for the production of folded sheet metal tubes from helically wound sheet metal strips.
DE543926C (en) * 1932-05-25 Titeflex Metal Hose Co Flexible finned tube
US2337374A (en) * 1943-03-10 1943-12-21 Abel E Chernack Collapsible tubing
US2592336A (en) * 1949-03-10 1952-04-08 Wiremold Co Machine and method for forming collapsible tubing
US4084309A (en) * 1976-08-09 1978-04-18 Cecil Howard Wood Apparatus and method of manufacturing flexible ducting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE543926C (en) * 1932-05-25 Titeflex Metal Hose Co Flexible finned tube
AT54473B (en) * 1910-10-14 1912-07-25 Jan Rysanek Process for the production of folded sheet metal tubes from helically wound sheet metal strips.
US2337374A (en) * 1943-03-10 1943-12-21 Abel E Chernack Collapsible tubing
US2592336A (en) * 1949-03-10 1952-04-08 Wiremold Co Machine and method for forming collapsible tubing
US4084309A (en) * 1976-08-09 1978-04-18 Cecil Howard Wood Apparatus and method of manufacturing flexible ducting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114613A1 (en) * 1983-01-24 1984-08-01 Friedrich Bürcher Coiled flexible tube

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