EP4096911A1 - Dispositif de production de tubes creux, notamment de pailles, et procédé pour de tels tubes creux - Google Patents

Dispositif de production de tubes creux, notamment de pailles, et procédé pour de tels tubes creux

Info

Publication number
EP4096911A1
EP4096911A1 EP21701274.9A EP21701274A EP4096911A1 EP 4096911 A1 EP4096911 A1 EP 4096911A1 EP 21701274 A EP21701274 A EP 21701274A EP 4096911 A1 EP4096911 A1 EP 4096911A1
Authority
EP
European Patent Office
Prior art keywords
format
strip
chamber
hollow tube
format device
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
EP21701274.9A
Other languages
German (de)
English (en)
Other versions
EP4096911B1 (fr
Inventor
Andreas Reichert
Ralf Soltow
Jürgen Pehmöller
Mathias Schafforz
Vincent LEMKE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koerber Technologies GmbH
Original Assignee
Koerber Technologies GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koerber Technologies GmbH filed Critical Koerber Technologies GmbH
Publication of EP4096911A1 publication Critical patent/EP4096911A1/fr
Application granted granted Critical
Publication of EP4096911B1 publication Critical patent/EP4096911B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C5/00—Making tubes or pipes without using mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0095—Making drinking straws

Definitions

  • the invention relates to a device for producing hollow tubes, in particular drinking straws.
  • the invention also relates to a method for producing drinking straws.
  • DE 10 2017 108 789 A1 discloses a method for producing a double-ply tube in the tobacco processing industry, in which an inner strip of material is conveyed longitudinally axially through a forming tube that tapers conically in the conveying direction, a tube being formed from the inner strip of material will.
  • an area of an outer material strip conveyed longitudinally axially is glued with an adhesive and the inner material strip, shaped into a tube, is applied to the glued area of the outer material strip.
  • the outer strip of material is wrapped around the inner strip of material, which is shaped into a tube, so that a double-layer tube is formed. It is also a strand machine of the tobacco processing industry with an inner material stripper in a conveying direction.
  • fens conically tapering forming tube in DE 10 2017 108 789 A1 of fenbart, wherein a format device is connected to an output of the forming tube, wherein the format device has a format tape that moves in the conveying direction and wherein the format device is formed after application of the to wrap the outer strip of material around the inner strip of material shaped into a tube on an outer strip of material.
  • the object of the present invention is to enable a very stable production process for hollow tubes, in particular for drinking straws, with the aim of improving the quality of the drinking straws produced.
  • it is the task of producing hollow tubes or drinking straws that are free of waves or that are smooth.
  • a device for the production of hollow tubes comprising a first mat device that is designed to convey a first strip of material axially longitudinally and to shape it into a first hollow tube during the conveyance, a second format device being provided , which is arranged in För derraum behind the first format device and is formed to wrap a second strip of material during a longitudinal axial conveyance of the second strip of material around the first strip of material, so that a double-layer hollow tube is formed, which has the first hollow tube inside and outside the second strip of material.
  • a double-layer hollow tube can be efficiently produced, from which drinking straws, for example, can then be cut to length.
  • the hollow tubes produced in this way have a longitudinal seam.
  • the first format device and the second format device preferably partially overlap. Overlapping is understood to mean, in particular, that the two format devices overlap in the conveying direction, that is to say partially lie one above the other or partially lie next to one another.
  • the exit of the first format device is preferably in the inlet area of the second material strip of the second format device.
  • the first format device preferably comprises a first format chamber and the second format device comprises a second format chamber, the first format chamber and the second format chamber being aligned with one another, in particular collinear.
  • the format chambers are elongated and hollow in the Formatvorrichtun conditions and are used to receive the material strips and to shape the material strips into a tube.
  • internal walls are provided which are provided with a decreasing radius of curvature in the conveying direction of the material strips. In this way, a flat or essentially flat strip of material can lie against the inner walls or nestle against a format tape that lies against the inner walls and be increasingly shaped into a hollow tube in the conveying direction.
  • a format tape is preferably provided in the second format chamber and runs through the format chamber from the beginning of the format chamber to the end of the format chamber.
  • the first format chamber and / or the second format chamber is preferably circular or elliptical in cross section.
  • An elliptical cross section is understood to mean a cross section that is not circular.
  • the first format device is preferably free of format tape.
  • the first strip of material is conveyed by a train that acts on the first strip of material in the second format device.
  • Each format device preferably comprises a lower format and an upper format.
  • the sub-format is the part of the format device that first comes into contact with the material strip and performs a pre-forming.
  • the upper format itself then closes the hollow tube. In connection with the sub-format, it therefore ensures a complete Hohlrohrfor mung.
  • Closing the hollow tube is understood here in particular to mean that the two lateral edges of the material strip are butted together. This then results in a longitudinal axial extension of this abutting edge along the pipe produced.
  • the diameter of the first format chamber is preferably smaller than the diameter of the second format chamber or the diameter of the first format chamber is as large as the diameter of the second format chamber.
  • the clear diameter is to be understood here, i.e. the diameter of the first format chamber and the diameter of the second format chamber in which a format tape also runs through, where the diameter from the inside of the format tape to the inside of the opposite upper format is meant.
  • This measure of adjusting the diameter ensures that the inner strip of material, i.e. the first strip of material, is conveyed to the outer strip of material with a little tension.
  • the first format device is preferably arranged in a mirror-offset or rotationally offset manner to the second format device.
  • a rotation through 180 ° is preferably provided.
  • the first format device then has, for example, the lower format on top and the upper format on the bottom and the second format device has the lower format on the bottom and the upper format on top.
  • the first format device is on one Level mirrored to the second format device.
  • Rotationsver is a twist.
  • the format devices are linearly displaced with respect to one another, so that the first format device is arranged upstream of the second format device in the conveying direction of the material strips. This is preferably a partial
  • the upper formats of the first format device and the second format device are preferably arranged adjacent to one another.
  • the contours of the first format chamber and / or the second format chamber are preferably symmetrical throughout.
  • the cross section of the format chambers is thus symmetrical. This has the advantage that very high quality hollow tubes can be formed. In particular, very high quality double-layer hollow tubes are formed.
  • a pressing element is provided in the inlet area of the first format device, which is designed to press the first material strip into a groove of the first format device.
  • the pressing element then presses the first strip of material into the groove in order to provide a pre-shaping of the first strip of material in the groove which is arranged in the sub-format and belongs to the first format chamber.
  • the shape of the groove and the shape of the pressure element on the opposite or mutually adjacent sides are complementary in shape.
  • a roller is preferably provided which is designed to press the first hollow tube onto the second material strip so that a stable connection of the first material strip, which is designed as a first hollow tube, to the second material strip is made possible.
  • the role is used to improve the entrainment of the first strip of material and the second strip of material through the format tape in the second format device. This measure ensures above all that the abutting edges of the first strip of material in the first hollow tube remain closed.
  • the first format device preferably comprises an inner wall along which the first strip of material is guided, the inner wall having a porous structure through which the first format chamber of the first format device can be acted upon with compressed air.
  • the porous structure is integrated, in particular, into an inner wall of the first format chamber, in particular into an inner wall of the upper format and / or lower format.
  • the first format device comprises an air chamber which acts on the porous structure with compressed air.
  • the compressed air exiting through the porous structure creates an air cushion between the inner wall and the first material strip.
  • the air cushion significantly reduces the friction between the inner wall and the strip of material guided along it.
  • the material strip is better preformed and guided, there is no heat build-up due to friction and the dust adhesion in this area is reduced.
  • the porous structure is particularly advantageous if the first format device is free of format tape. The air cushions largely eliminate the friction forces that occur when conveying without format tape.
  • the device preferably comprises a particularly driven, grooved embossing roller and a pressure roller, which are designed to carry out the first strip of material between them and to provide them with, in particular longitudinally axial, grooves, in particular a distance between the embossing roller and the pressure roller of a half to three quarters, in particular essentially two thirds, corresponds to a thickness of the first mate rialstMails.
  • Longitudinal axial grooves are understood to mean grooves which extend parallel to the conveying direction of the first strip of material.
  • the embossing roller is arranged upstream of the first format device in the conveying direction.
  • the grooves are made in the first strip of material with the stamping roller. The grooves reduce the bending back of the material strip, since a thickness of the material strip is reduced in the regions of the grooves, so that the rigidity is reduced.
  • the grooves are made in the material strip in such a way that the material strip is not completely cut through. The first strip of material can be better preformed through the grooves.
  • the tension of the first strip of material in the first format device is supported by the additional drive of the embossing roller, since the first strip of material in the first format chamber is not only driven by the support on the second strip of material, but also by the embossing roller.
  • a strand machine for producing hollow tubes, in particular double-layer hollow tubes, in particular drinking straws preferably comprises a device according to the invention or a further developed device which is described above.
  • the object is also achieved by a method for producing drinking straws with the following method steps: longitudinally axial conveying of a first material strip through a first format chamber of a first format device, a first hollow tube being formed from the first material strip,
  • the method according to the invention enables very high quality drinking straws to be produced.
  • a very smooth surface is made possible on the inside as well as on the outside of the drinking straws. Since the second strip of material was previously glued or provided with adhesive, a connection of the two strips of material is made possible when the second strip of material is wrapped around the first strip of material.
  • the second strip of material is wrapped around the first strip of material in the second format device.
  • the second format device preferably has a heated seam plate or a heated Oberfor mat in order to enable faster setting of the seam area of the double-layer hollow tube.
  • the seam areas i.e. the edges of the first strip of material, preferably lie opposite the edges of the second strip of material.
  • the seam areas are preferably offset from one another by 180 °.
  • the surface is preferably glued over the entire area or essentially glued over the entire area, as a result of which a very reliable connection of the two material strips is possible.
  • Gluing over the entire surface is understood in particular to mean that the second strip of material is glued over the entire width.
  • the gluing can be interrupted in a short range so that when cutting the double-layer hollow tube into, for example, drinking straws or hollow tubes, a cutting knife that is preferably to be used is not contaminated with adhesive. The cut area is left out of the gluing, so to speak.
  • the first strip of material can be preformed by means of an elliptical roller.
  • the ellipse is provided in the cross section of the roller.
  • first strip of material has a first and a second edge that are in abutment in the formed hollow tube
  • a very high quality of the double-layer hollow tubes formed, in particular drinking straws is possible.
  • the quality can be further increased if the second material strip has a third and a fourth edge which, after enveloping the first material strip, are in abutment with the second material strip.
  • Particularly stable hollow tubes or drinking straws are possible when the joint areas of the first strip of material and of the second strip of material are opposite one another.
  • the joint area of the first strip of material is preferably between a 4 o'clock and an 8 o'clock position, preferably at a 6 o'clock position.
  • the radial Winkelab stood the joint areas of the second strip of material in relation to the first strip of material is preferably 145 ° and 225 °.
  • a radial angular spacing of 170 ° and 190 ° is preferably provided.
  • a radial angular spacing of 180 ° is particularly preferably provided.
  • the ratio of the width of the second strip of material to the width of the first strip of material is preferably between 52:48 and 50.5:49.5.
  • the ratio of the widths of the material strips to one another can depend on the diameter of the hollow tube or drinking straw. For example, with an outer diameter of 4.5 mm, the ratio of the widths can be in the range from 51.5 to 48.5. With an outer diameter of, for example, 5.3 mm, this ratio can be 51.1 to 48.9, and with an outer diameter of 7.4 mm, this ratio can be 50.5 to 49.5.
  • an inner joint, which lies between the edges of the first strip of material, of 0.0 mm is provided, and an outer joint of 0.0 mm to 0.4 mm is provided between the edges of the second strip of material.
  • the weight of the first and / or second material strip in the event that it is paper, is preferably in a range from 27 g / m 2 to 160 g / m 2 , in particular 120 g / m 2 to 140 g / m 2 2 . Particularly preferred is the weight at 130 g / m 2 .
  • the thickness of the first and second material strips is preferably in a range from 100 ⁇ m to 180 ⁇ m, in particular 135 ⁇ m to 175 ⁇ m, in particular 155 ⁇ m.
  • the application thickness of the adhesive which is also referred to as position adhesive, is preferably in a range from 10 ⁇ m to 40 ⁇ m, in particular 15 ⁇ m to 30 ⁇ m.
  • the width of the material strips can be 23 mm to 61 mm, in particular 24 mm to 48 mm, depending on the format.
  • the strips of material can be made of paper or cardboard, which has the appropriate thickness and weight as indicated above.
  • the paper can be colored on one or both sides, patches made of aluminum or other materials, for example, can be applied, or the paper can be vapor-coated with a material, for example aluminum lamination can be provided. Embossing or printing can also be seen in front of it.
  • One type of adhesive or several, for example two types of adhesive can be provided as the adhesive.
  • a PVA adhesive polyvinyl acetate adhesive
  • an additional hotmelt adhesive can be provided.
  • the diameter of the double-layer hollow tube produced is preferably between 4 mm and 10 mm.
  • a thickness of the first is preferred Strip of material and the second strip of material between 0.1 mm and 0.18 mm, preferably 0.15 mm to 0.16 mm, provided. Cold glue or hot glue can be used as the adhesive.
  • edges of the respective material strip section are in abutment, this means that these edges abut one another or are at a small distance from one another.
  • the longitudinal axial conveying of the first material strip through the first format chamber and the second format chamber is preferably carried out in a straight line.
  • a straight line means conveying the first strip of material in an aligned manner or conveying without kinks.
  • a small tube in such a way that the finished molded inner tube is placed or inserted coaxially into the outer tube or coaxially on the outer material strip.
  • the finished formed strip of material of the inner hollow tube no longer has to be deflected, so that no additional kinks or tensions occur in the strip of material, for example paper.
  • the contour of a format device or the format chamber of a format device is used to shape the material strips.
  • two format devices and two format chambers are used.
  • the inner surface of the format chambers represents a transition from a straight line or essentially straight line to a circle or an ellipse in the conveying direction.
  • the inner diameter of the format tube or of the first format chamber of the first format device corresponds to the outer diameter of the formed first hollow tube or inner hollow tube. This creates a tension in the material strip, which causes the material strip to lie against the inner wall of the first format chamber of the first format device and to form a round circle or, if the format chamber has an elliptical shape, an ellipse.
  • a hold-down device or a pressing device or a pressing element is used to press the material strip against the wall of the first format chamber.
  • the first and the second format device can be of small construction if they are designed symmetrically, that is to say have inner walls of the format chambers that are symmetrical in cross section, in particular continuous in cross section.
  • a symmetrical shape is possible because the first strip of material is not knocked over one another during molding, but rather the edges of the first strip of material are butt jointed and preferably the second strip of material is not knocked over one another, but the material edges butted there as well will.
  • the deflection of the second material web is preferably carried out around a deflection of a format tape of the second format device.
  • the deflection can be a deflection roller for the format tape.
  • the first strip of material can additionally be preformed with an elliptical roller. It is also preferably provided, by means of a roller, which can also be designed as a roller, to press the inner hollow tube onto the outer strip of material in order to improve the entrainment of the inner hollow tube.
  • a roller which can also be designed as a roller, to press the inner hollow tube onto the outer strip of material in order to improve the entrainment of the inner hollow tube.
  • an application of glue with a nozzle can be provided at the same point or in addition thereto, for example, in order to make a seam closure of the second material strip even more secure.
  • the invention makes it possible that the inner material strip does not have to be twisted in order to achieve an equally smooth surface inside and outside. In addition, process stability, a high degree of roundness and a small amount of glue or adhesive are possible.
  • the upper format of the first format device is preferably in longitudinal divided in two in the axial direction, so that two jaws forming part of the first format chamber are provided.
  • Cooling of at least part of the first format device is preferably provided.
  • the invention also enables a rarer occurrence of a paper jam in the production of hollow tubes, since the open strand forming areas can be kept short.
  • Fig. 1 shows a device according to the invention in a schematic dreidi dimensional representation
  • Fig. 3 is a schematic sectional view along A-A from Fig. 1,
  • FIG. 4 shows a schematic sectional illustration along section BB from FIG. 1, 5 shows a sectional view of a hollow tube produced,
  • FIGS. 6 shows a schematic sectional illustration along section C-C from FIGS. 1 and
  • FIG. 7 is a schematic sectional illustration in another embodiment of a device according to the invention also along a section C-C from FIG. 1
  • FIG. 8 is a schematically simplified three-dimensional sectional illustration of a cover strip of a first format device with a porous structure
  • FIG. 9 shows a schematically simplified three-dimensional representation of an embossing roller and a pressure roller for introducing grooves into the first strip of material
  • Fig. 10 is a schematically simplified sectional view of the embossing roller and the pressure roller.
  • Fig. 1 shows schematically a three-dimensional representation of a device according to the invention.
  • a first format device 11 is seen in front of it, followed by a second format device 12 in the conveying direction 20.
  • the first format device 11 overlaps the second format device 12 in an overlap area 18.
  • the first format device 11 has a lower format 50 and an upper format 51.
  • the lower format 50 with the upper format 51 form a first format chamber 31, not shown in FIG. 1, which in this embodiment has inner walls that form a circular contour at the latest at the exit of the first format device 11.
  • the lower format 50 is in Fig. 1 above the upper format 51.
  • the lower format 50 is divided into two parts in the longitudinal direction.
  • the upper format 51 is also divided into two parts in the longitudinal direction.
  • the lower format 50 and the upper format 51 can also each be formed in one piece.
  • a hold-down device or a pressure element 14 is provided which pushes the first material strip 21 into a groove in the upper format 51.
  • FIG. 6 namely a schematic sectional illustration along CC from FIG. 1.
  • the pressing element 14 is shown on the inside, pressing on the first strip of material 21.
  • the groove in the sub-format 50 is preferably starting with a straight surface for receiving the first strip of material 21 and is continuously formed in the conveying direction 20 in the direction of a partial circle or a semicircle.
  • a groove is provided in the upper format 51 which takes up the deformation of the groove of the lower format 50 and at the latest at the end of the first format device 11 forms a second semicircle or residual pitch circle, so that the first format chamber 31 of the first format device 11 in cross section has a circular shape.
  • a first hollow tube 23 is formed which is circular in cross-section.
  • a first hollow tube 23 is thus formed, which has a first edge 41 lying below and a second edge 42 lying below, which are butted (see Fig. 4).
  • the first wrapping material strip 21 is drawn through the first format device 11 in that it rests on a second wrapping material strip 22 due to adhesion, preferably static friction or adhesive adhesion.
  • the second wrapping material strip 22 is pulled through the second format device 12 by a format tape 54, which is deflected into the second format device 12 at the entrance of the second format device 12 via a deflection roller 19.
  • a second strip of material 22 is thus placed on the format tape 54.
  • the second strip of material 22 is provided with adhesive on the surface 16 so that a stable, double-layered hollow tube can be produced efficiently.
  • the first hollow tube 23 is placed on the second material strip 22 and pulled along in the conveying direction 20 by the conveyance of the second material strip 22 by means of the format band 54.
  • the second format device 12 comprises a sub-format 52 and a
  • Upper format 53 The lower format 52 is shown here in one piece and the upper format 53 in two parts.
  • the two format devices 52, 53 overlap in the overlap region 18.
  • a seam plate or a heating device or a cooling device, depending on which adhesive is used, can be provided next to the second format device 12.
  • a roller 15, which can also be designed as a roller can press the first hollow tube 23 onto the second material strip 22. This is shown schematically in FIG. 2 Darge.
  • the format tape 54 is then, which is not shown, removed from the double-layer hollow tube 10 produced and returned to the deflection roller 19.
  • the hollow tube 10 produced can then be cut to length or cut into correspondingly long hollow tubes. This allows drinking straws to be produced very efficiently.
  • FIG. 2 shows schematically in a three-dimensional representation how the first strip of material 21 is guided from below via a roller, not shown, to a first format device, not shown, and is conveyed in the first format device to a first hollow tube 23.
  • the first hollow tube 23 is pressed by means of a roller 15 onto a second material strip 22, which is conveyed via a deflection roller (not shown) and which is placed on a format tape 54.
  • This second wrapping material strip 22 is then wrapped around the first hollow tube 23 and thus forms a hollow tube 10.
  • FIG. 3 schematically shows a sectional illustration along section A-A from FIG. 1, which shows part of the overlap region 18.
  • the lower format 52 with the upper format 53 of the second Formatvorrich device 12 is shown.
  • a format tape 54 is shown in the groove of the Formatvorrich device, on which the second Umhüllungsmateri alstrip 12 is placed.
  • the first material strip 21 formed to form a first hollow tube 23 is shown, which is still held up in this area by the sub-format 50 of the first format device 11 or is provided as a conveyor limit.
  • the second strip of material 22 is still open in the upper area.
  • the conveying direction 20 is a section along B-B from
  • FIG. 1 is shown schematically in Fig. 4.
  • the upper format 53 is essentially closed there, so that a double-layer hollow tube 10 is formed there from the two material strips 21, 22.
  • Fig. 5 shows schematically the hollow tube 10 produced in a sectional view. There are also a first edge 41 and a second edge 42 of the first material strip 21, which are abutted, and a third edge 43 and a fourth edge 44 of the second strip of material 22, which are also abutted conditions, shown.
  • FIG. 4 shows the second format chamber 32 of the second format device 12.
  • FIG. 6 shows a schematic sectional illustration along section C-C from FIG. 1 in the conveying direction.
  • the first format device 11 is shown comprising a lower format 50 and an upper format 51.
  • the lower format 50 and the upper format 51 are superposed so that a first format chamber 31 is formed by the grooves in the upper format and the lower format.
  • a pressing element 14 is provided in the groove of the upper format 50, which presses a first strip of material 21, which is shown in FIG. 6, upwards into the groove.
  • the upper format 51 and the lower format 50 are each divided in two, namely divided in two in the longitudinal direction, so that the division is aligned vertically in each case.
  • the first format device 11 is followed by a second format device 12, which has a lower format 52 and an upper format 53.
  • a format tape 54 onto which a second strip of material 22 is placed, runs through the second format device 12.
  • the second strip of material 22 is formed into a hollow tube in the second format chamber of the second format device 12, namely around the hollow tube formed in the first format device 11
  • the pressing device or the pressing element 14 has a longitudinal extension into the format chamber 31.
  • the length of the pressing element is preferably between 30% and 100%, in particular 40% and 80%, of the length of the first format device 11.
  • FIG. 7 shows a schematic sectional illustration along a section which corresponds to section CC from FIG. 1.
  • the first format device 11 is shown in a different embodiment.
  • the first format device 11 has no upper format and also no lower format, but has the upper and lower format formed in one piece.
  • the first format device 11 is, however, divided overall, namely divided into two parts in the longitudinal direction, the division being oriented vertically.
  • a first format device 11 comprising a rear format part 56 and a front format part 57.
  • the front format part 57 can be folded or pivoted to the side or forwards, ie in FIG - Person can get into the first format chamber 31 and can make settings and operating work there.
  • the rear For mat part 56 can be folded away or pivoted to the rear.
  • FIG. 8 shows a schematically simplified three-dimensional sectional view of an upper format of a first format device 11 with a porous structure 60 which is integrated into an inner wall 61 of the upper format of the first format chamber 31.
  • the porous structure 60 can be acted upon by compressed air through an air chamber 62.
  • the compressed air forms an air cushion between the inner wall 61 or the porous structure 60 and the first strip of material 21 in the first format chamber
  • FIG. 9 shows a schematically simplified three-dimensional representation of a driven stamping roller 70 with a grooved contour 74.
  • a pressure roller 72 is arranged opposite the stamping roller 70.
  • a motor that drives the embossing roller 70 is not shown in Fig. 9 for the sake of clarity.
  • An arrangement comprising the embossing roller 70 and the pressure roller 72 is arranged upstream of the first format device 11 and embosses the first material strip 21 with longitudinal axes
  • Fig. 10 shows a schematically simplified sectional view of the embossing roller 70 and the pressure roller 72.
  • the grooved Kon structure 74 is visible.
  • the contour 74 shown has a sawtooth-like profile is purely exemplary.
  • the contour 74 can have any other profile with which grooves can be introduced into the first strip of material 21.
  • the distance between the upper edge of the contour 74 and the Oberflä surface of the pressure roller 72 is about two thirds of the thickness of the first strip of material. This prevents the contour 74 from completely severing the first strip of material 21.

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Abstract

L'invention concerne un dispositif de production de tubes creux (10), notamment de pailles, comprenant un premier dispositif de mise en forme (11) qui est conçu pour transporter une première bande de matériau (21) dans une direction axiale longitudinale et pour façonner ladite bande en un premier tube creux (23) au cours du processus de transport, un second dispositif de mise en forme (12) qui est disposé derrière le premier dispositif de mise en forme (11) dans la direction de transport (20) et est conçu pour enrouler une seconde bande de matériau (22) autour de la première bande de matériau (21) en même temps que la seconde bande de matériau (22) est transportée dans une direction axiale longitudinale de sorte qu'un tube creux à double couche (10) soit formé présentant le premier tube creux (23) sur l'intérieur et la seconde bande de matériau (22) sur l'extérieur.
EP21701274.9A 2020-03-16 2021-01-19 Dispositif de production de tubes creux, notamment de pailles, et procédé pour de tels tubes creux Active EP4096911B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020107088.8A DE102020107088A1 (de) 2020-03-16 2020-03-16 Vorrichtung zur Herstellung von Hohlrohren, insbesondere Trinkhalmen, und Verfahren hierzu
PCT/EP2021/051004 WO2021185486A1 (fr) 2020-03-16 2021-01-19 Dispositif de production de tubes creux, notamment de pailles, et procédé pour de tels tubes creux

Publications (2)

Publication Number Publication Date
EP4096911A1 true EP4096911A1 (fr) 2022-12-07
EP4096911B1 EP4096911B1 (fr) 2024-07-03

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WO2021185486A1 (fr) 2020-03-16 2021-09-23 Hauni Maschinenbau Gmbh Dispositif de production de tubes creux, notamment de pailles, et procédé pour de tels tubes creux

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DE102022116045A1 (de) 2022-06-28 2023-12-28 Körber Technologies Gmbh Vorrichtung und Verfahren zur Herstellung von Hohlrohren

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Publication number Priority date Publication date Assignee Title
WO2021185486A1 (fr) 2020-03-16 2021-09-23 Hauni Maschinenbau Gmbh Dispositif de production de tubes creux, notamment de pailles, et procédé pour de tels tubes creux

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DE102020107088A1 (de) 2021-09-16
EP4096911B1 (fr) 2024-07-03

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