EP4116244A1 - Dispositif et processus de l'industrie de transformation du tabac permettant de relier deux bandes de matière - Google Patents

Dispositif et processus de l'industrie de transformation du tabac permettant de relier deux bandes de matière Download PDF

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Publication number
EP4116244A1
EP4116244A1 EP22179276.5A EP22179276A EP4116244A1 EP 4116244 A1 EP4116244 A1 EP 4116244A1 EP 22179276 A EP22179276 A EP 22179276A EP 4116244 A1 EP4116244 A1 EP 4116244A1
Authority
EP
European Patent Office
Prior art keywords
web
cutting
adhesive
material web
free end
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.)
Pending
Application number
EP22179276.5A
Other languages
German (de)
English (en)
Inventor
Ralph Röder
Hartmut Meis
Jörn Punzius
Mike Möller
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 EP4116244A1 publication Critical patent/EP4116244A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1842—Attaching, e.g. pasting, the replacement web to the expiring web standing splicing, i.e. the expiring web being stationary during splicing contact
    • B65H19/1852—Attaching, e.g. pasting, the replacement web to the expiring web standing splicing, i.e. the expiring web being stationary during splicing contact taking place at a distance from the replacement roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H21/00—Apparatus for splicing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • B65H35/0073—Details
    • B65H35/008—Arrangements or adaptations of cutting devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/10—Devices using liquid inhalable precursors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/462—Form of splice
    • B65H2301/4621—Overlapping article or web portions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/462—Form of splice
    • B65H2301/4623—Spaced article or web portions, i.e. gap between edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/463—Splicing splicing means, i.e. means by which a web end is bound to another web end
    • B65H2301/4631—Adhesive tape
    • B65H2301/46314—Pieces of adhesive tape, e.g. labels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/463—Splicing splicing means, i.e. means by which a web end is bound to another web end
    • B65H2301/4633—Glue
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51532—Blade cutter, e.g. single blade cutter
    • B65H2301/515326—Multiple blade cutter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/54—Cigarette making

Definitions

  • the invention relates to a device in the tobacco processing industry for connecting a first porous material web running out in a conveying direction to a second porous material web, comprising a cutting device for cutting a free, trailing end of the first material web and a free, leading end of the second material web and a Connecting device for connecting the free end of the first web of material to the free end of the second web of material to form an endless porous web of material, forming an overlapping region extending transversely to the conveying direction over a width of the endless web of material, the cutting device also being set up to produce two different cutting paths , such that at the free end of the first web of material there is a first incision that is not complementary to a second incision made at the free end of the second web of material, and wherein the V connection device is set up to connect the free ends of the material webs in such a way that in the overlapping area there is at least one opening across the width of the endless web of material.
  • the invention relates to a method for connecting a first porous material web running out in a conveying direction to a second porous material web, comprising the following steps: cutting a free, trailing end of the first material web and a free, leading end of the second material web with a cutting device, Connecting the free end of the first web of material to the free end of the second web of material to form an endless porous web of material with a connecting device, forming an overlapping area that extends transversely to the conveying direction over a width of the endless web of material, with the cutting device producing two different cuts in such a way that at the free end of the first web of material there is a first incision that is not complementary to a second incision made at the free end of the second web of material, and the free ends of the webs of material are such verb and that there is at least one opening in the overlapping area over the width of the endless web of material
  • Devices and methods for connecting two webs of material of finite length are used in the tobacco processing industry above all when endless webs of material are to be made available in order to maintain the production of endless strands without interruption. This applies, for example, to the manufacture of tobacco rods, filters or filter rods, but also to the manufacture of so-called heat-not-burn products, i.e. products that are heated but not burned during consumption.
  • the finitely long webs of material are usually available on bobbins. Before a first material web present on a first reel is completely unwound and the reel runs empty, a second material web present on a second reel is positioned in the same conveying direction as the first material web.
  • the two webs of material more precisely the trailing one free end of the first web of material, which is still in production, and the leading free end of the new web of material, which is still almost completely on the second bobbin, are aligned with one another, cut and then joined together to form an endless web of material.
  • Production is then continued with the second web of material on the second bobbin, which is then also transported in the conveying direction. Additional webs of material are reconnected to the web of material that is being discharged in the manner described, so that a continuous production process is ensured.
  • the cutting and joining of finite webs of material to form an infinitely long web of material is also referred to as "splicing".
  • a device for attaching strip material from a spool to the strip material from an empty spool is already disclosed, for example DE 31 40 768 A1 out.
  • two webs of strip material, which are adjacent to one another on their end faces, ie butt, are connected to one another by a continuous adhesive tape running transversely to the longitudinal direction of the webs.
  • the adhesive tape connects the large flat sides of the two strips on one side.
  • the webs of material are cut at right angles, ie transversely to the conveying direction of the webs of material, and connected to one another.
  • the webs of material can be connected to one another without the use of auxiliary materials, for example by moistening and pressing or embossing.
  • a device, with which such a type of connection between two webs of material can be produced is, for example, from DE 10 2014 018 818 A1 known.
  • An endless web of material which is joined together from two overlapping webs of material or in which the two webs of material are connected to one another with a continuous adhesive strip, inevitably has an excess of material in the connection area between the two flat webs.
  • This excess material is caused either by the adhesive tape applied to connect the flat webs or by the overlapping area in which the flat web is present twice due to the overlapping of the first and second flat webs.
  • the overlapping area extends over the full width of the web of material, which can lead to a sudden and jerky thickening in the production process, for example of a strand produced with the aid of the endless flat web.
  • Such a thickening has to be transported through a format, for example, which can lead to corresponding problems, including tearing of the strand to be formed or of the endless web of material.
  • it is also known not to make the cuts perpendicular to the conveying direction, but at an acute angle to it.
  • the thickening that occurs can thus be distributed over a larger longitudinal area of the material web.
  • a corresponding device with which such a connection between two flat webs can be realized is from DE 10 2014 018 818 A1 known. With a diagonal cut, the double layer of material is distributed over a longer distance in the conveying direction due to the triangular free ends. Nevertheless, the endless web of material is thicker in the overlapping area. So there is still an accumulation of material.
  • the cut edges of the webs of material produced with the aforementioned devices are always form-fitting.
  • the tracks complement each other when the cut edges are butt pushed in front of each other in the plane of the material webs (i.e. without overlapping each other), in their form to a closed surface.
  • Such a fit of the cut edges should also be referred to as shape-complementary.
  • EP 3 757 046 A1 proposed to provide at least one opening in the overlapping area.
  • a connecting station of the device known from this document is designed in such a way that the accumulation of material in the overlapping area is reduced and ideally completely avoided.
  • the technical disadvantages associated with a thickening of the material web in the overlapping area can be overcome.
  • the two webs of material are connected without adhesive, for example by moistening and then pressing and possibly additional heating of the connection area.
  • Such a device is preferably suitable for connecting material webs containing tobacco material.
  • the situation is different with porous webs of material.
  • a porous web of material should be understood to mean a web of material which is at least partially air-permeable. Such webs of material are processed, for example, for the production of paper filters. Conventional devices are only suitable for connecting such webs to a very limited extent.
  • a device in the tobacco processing industry for connecting a first porous material web, which runs out in a conveying direction, to a second porous material web
  • the device comprising: a cutting device for cutting a free, trailing end of the first material web and a free, leading end of the second material web and a connecting device for connecting the free end of the first material web to the free end of the second material web to form an endless material web, forming a transverse to the conveying direction over a width of endless material web extending overlapping area, wherein the cutting device is also set up to produce two different cutting paths, such that at the free end of the first material web there is a first cutting path that is not complementary to a second cutting path created at the free end of the second material web, and wherein the Connecting device is set up to connect the free ends of the material webs in such a way that in the overlapping area across the width of the endless material web there is at least one opening, the device being further developed in that the connecting device comprises an adhesive application device which is set up to apply
  • the configuration of the device according to the invention is based on the finding that porous webs of material, ie webs made of a material which has a certain air permeability, can be connected very well with the aid of adhesive pads.
  • the webs of material are in particular paper-like webs of material.
  • the webs of material are free of tobacco material.
  • the joining techniques known from the prior art for example those in which the material is moistened and then possibly pressed under the action of heat, always require that the webs of material to be joined have the property of adhering to one another when they are moistened. This is generally not the case with paper-like material webs, which is why an adhesive-free connection can only be realized in a few cases. Embossing or knurling is one way of connecting webs of material without adhesive. These connection techniques have turned out to be unsuitable for porous materials.
  • an adhesive pad without carrier material does not have a carrier arranged centrally between the adhesive layers.
  • an adhesive pad should be understood to mean a spatially limited, extended area in which an adhesive is present.
  • the adhesive pad is inherently stable, i.e. it does not disintegrate under its own weight.
  • An adhesive pad can be provided, for example, from a high or extremely viscous adhesive, a gel-like adhesive or a film-like adhesive, ie an adhesive present in the form of a thin layer.
  • the adhesive pad is preferably applied to the second web of material. This configuration of the device has proven to be particularly favorable in terms of process technology.
  • the device is developed in that the adhesive application device is set up to apply the adhesive pad from an adhesive transfer tape.
  • the use of transfer adhesive tapes has proven to be particularly advantageous in practice. For example, these are readily available and can be exchanged quickly.
  • the adhesive application device is set up to apply hot glue or other liquid adhesives that are so viscous or even highly viscous that they do not penetrate the porous web of material.
  • an adhesive application device comprises in particular a transfer roller which is set up to temporarily hold one or more adhesive pad(s) and to apply them to the first and/or second web of material.
  • adhesive pads are applied to one or more transverse positions on this transfer roller by means of an adhesive supply device.
  • the adhesive application device thus comprises an adhesive supply device, with the transfer roller and the adhesive supply device being set up such that one or more adhesive pad(s) can be applied to the transfer roller by the adhesive supply device at one or more transverse positions spaced apart from one another in the axial direction of the transfer roller.
  • the adhesive application device is also set up in such a way that the transfer roller can be moved between a pick-up position, in which the adhesive supply device applies the at least one adhesive pad to the transfer roller, and an application position.
  • the direction of travel is in particular at least approximately parallel to the axial direction of the transfer roller.
  • the adhesive application device is also set up in particular to carry out a radial displacement movement of the transfer roller in the application position for applying the adhesive pads to the first and/or second web of material.
  • the transfer roller can be moved radially (i.e. transversely to the axial direction of the transfer roller) by a certain amount, so that the transfer roller comes into contact with the material web and the at least one adhesive pad can be applied by the transfer roller to the end of the first and/or second material web is.
  • the support surface of the cutting device is designed to be movable in the direction of the transfer roller. The material web is moved by the movement in the direction of the transfer roller, so that the at least one adhesive pad can be applied to the end of the first and/or second material web.
  • the cutting device may include first and second support surfaces. Provision is also made for the first or the second support surface to be designed to be movable in the direction of the transfer roller. In this way, the at least one adhesive pad can be applied in a targeted manner to the end of the first or the second web of material.
  • both support surfaces can also be designed to be movable, as described above.
  • the adhesive application device can also be set up in particular to carry out a rolling movement when the transfer roller comes into contact with the material web. During this rolling movement, the transfer roller is rolled on the surface of the material web until the at least one adhesive pad has been completely transferred to the material web.
  • the adhesive application device which is set up to apply the adhesive pad from an adhesive transfer tape, can also be set up to carry out the described radial displacement movement and/or the rolling movement.
  • Such an adhesive application device can also be designed to be movable between a rest position and an application position.
  • the adhesive application device can also include cassettes in which the transfer adhesive tape is located. These cassettes are attached to a bracket with quick-release fasteners, for example, so that they can be easily replaced.
  • An adhesive application device, in which the adhesive pad is applied by an adhesive transfer tape can alternatively or additionally be combined with a cutting device, the support surface of which points in the direction of the adhesive application device is designed to be movable.
  • the device also includes, in particular, a press which is provided downstream of the adhesive application device as part of the connecting device.
  • a pressing device comprises, for example, two counter-rotating press rollers, between which the endless web of material runs.
  • the pressing device can be set up to exert a contact pressure on the endless material web at least in the overlapping area.
  • the material-free areas will be larger than the overlap zones.
  • An overlapping zone is understood to mean an area that lies in the overlapping area of the flat webs and in which the flat webs lie on top of one another.
  • the endless flat web has a multiple material thickness, or twice the material thickness in the case of two material webs of the same thickness.
  • the material-free areas serve to compensate for the excess mass in the overlapping zones and the mass of the applied adhesive pad.
  • the dimensions of the material-free areas and the overlapping zones can be determined, for example, by the shape of the cut of the cutting device (measure a)).
  • the overlapping zones will also increase and the increase in mass in the overlapping area, again viewed along the line integral, will also increase (measure b)).
  • This effect can be compensated for, for example, by appropriate designs of the cut (measures a)), which then provides relatively large material-free areas.
  • One or both parameters can now in turn be matched to the mass of the applied adhesive pads (measure c)).
  • the cut i.e. the shape and size of the material-free areas and the overlapping zones, can be adjusted and the overlapping area can be increased or decreased in the conveying direction. This measure would correspond to an exemplary coordination of all three parameters.
  • the cutting device is set up in particular to cut the free ends of the two material webs in an inversely complementary manner.
  • the shape of the section sinusoidal The sinusoidal cut made in the first web of material is 180° out of phase with the sinusoidal cut made in the second web of material.
  • Wave crest meets wave crest and wave trough meets wave trough.
  • the two webs of material overlap in the area of their wave crests and form overlapping zones there. In the area of the wave troughs, there are openings in the endless web of material, ie material-free areas.
  • the cut of the cutting device is sinusoidal, it is advisable to make the adhesive pads round or oval. In this way, the area present in the overlapping zone, in which the two webs of material lie on top of one another, can be ideally utilized. A particularly strong and stable connection of the two webs of material is possible.
  • the cutting device is developed in that it comprises a punching tool or a cutting tool which is set up to produce at least one material-free area or opening in the overlapping area of the two material webs. In this way, additional material can be saved in the overlapping area of the two material webs, with the aim of counteracting an increase in mass in the overlapping area.
  • the device is developed in that the cutting device has a first support surface for contacting the outgoing first web of material and a second support surface for contacting the second web of material, the first and/or the second support surface each having at least one fluid-dynamic gripper for holding the first and/or second web of material are/is equipped.
  • Non-porous webs of material such as wrapping paper webs
  • this is not possible with porous webs of material due to their permeability to air. For this reason, a fluid dynamic gripper is used.
  • a fluid dynamic gripper is understood to mean a gripping device that makes use of the physical effect that in a fluid, which can be considered incompressible at first approximation, the flow velocity of a stationary flow decreases with the available flow cross-section increases. The increased flow speed in turn leads to a reduction in pressure in the area in which the smaller cross-section is available for the flow.
  • a fluid dynamic gripper uses airflow to hold an object, in this case a web of material, without physical contact. It is based on the airflow principle, according to which a high-velocity airflow has a low static pressure. With careful design, the pressure in the high velocity airflow can be less than atmospheric pressure. This results in a net force on the object, i.e. the flat web, in a direction perpendicular to the support surface.
  • a fluid dynamic gripper exploits this by maintaining a low static pressure on a gripper surface, which is at least approximately in the support surface, compared to the ambient pressure, while at the same time there is an air gap between the gripper or support surface and the object being held, i.e. the material web , is maintained.
  • the fluid dynamic gripper comprises at least one connection via which compressed air is supplied to the gripper.
  • this connection leads via a supply channel to a distribution chamber into which the supply channel opens.
  • the distribution chamber has a narrow gap that opens out at a gripping surface of the fluid dynamic gripper. This gap is preferably designed in such a way that the air is at an acute angle to the gripping surface flows out and spreads as parallel as possible to the gripping surface.
  • the compressed air flows between a material to be held, in the present case the first and/or second web of material, and the gripping surface of the fluid-dynamic gripper.
  • the compressed air flows at high speed due to the small flow cross-section available.
  • a negative pressure is created in this area between the gripping surface and the web of material.
  • the material web is pressed against the gripping surface of the fluid dynamic gripper by the ambient pressure.
  • the device is further developed in that the first and the second support surface each comprise only a single fluid-dynamic gripper. If several fluid-dynamic grippers were arranged in the support surfaces, they could impede each other's effect. However, it is also provided that several fluid dynamic grippers are arranged in a single support surface.
  • the at least one fluid dynamic gripper can be designed in the form of a strip.
  • a strip-shaped fluid-dynamic gripper is to be understood as meaning a fluid-dynamic gripper whose distribution chamber is elongated and opens into a narrow outflow gap provided for air outlet, this outflow gap having straight sections opposite one another, which run at least approximately parallel to one another.
  • the straight sections of the outflow gap are connected to one another, for example, by arcuate gap sections.
  • This outflow gap is also designed, for example, in such a way that the air flows out at an acute angle to the gripping surface and spreads out as parallel as possible to the gripping surface.
  • the outflow gap preferably lies in a common plane with the support surface.
  • Fluid dynamic grippers have proven to be particularly suitable for holding porous, air-permeable materials. According to further embodiments, it is provided that additional gripping devices should be provided, for example in the case of certain materials, that the fluid dynamic grippers develop an insufficient holding force. For example, a surface covered with needles or a mechanical holding device can be provided for fixation.
  • the first and the second porous web of material are made of an air-permeable material, in particular a fleece material, and have a permeability to air which is greater than the permeability to air of a wrapping paper web.
  • the object is also achieved by a method for connecting a first porous material web running out in a conveying direction to a second porous material web, this method comprising the following steps: cutting a free, trailing end of the first material web and a free, leading end of the second Material web with a cutting device, connecting the free end of the first material web to the free end of the second material web to form an endless porous material web with a connecting device, forming an overlapping area extending transversely to the conveying direction over a width of the endless material web, the cutting device cutting two different courses generated in such a way that at the free end of the first web of material there is a first cut that is not complementary to a second cut that is produced at the free end of the second web of material, and the free ends de r material webs are connected in such a way that in the overlapping area across the width of the endless material web there is at least one opening, the method being developed in that the connecting device comprises an adhesive application device, with which for connecting the free ends of the material webs onto the free end
  • the method is further advantageously developed in that the adhesive application device is used to apply the at least one adhesive pad from an adhesive transfer tape.
  • the adhesive pad can advantageously also be applied in the form of hot glue or a viscous or highly viscous adhesive.
  • a transfer roller is also used, as has been described above in connection with the device.
  • the method is characterized in particular by the fact that the cutting device has a first support surface on which the outgoing first web of material is in contact at least during the cutting process, and the cutting device also has a second support surface on which the second web of material is in contact at least during the cutting process, wherein the first and/or the second support surface is/are each equipped with at least one fluid-dynamic gripper with which the first and/or the second material web are/is held.
  • the first and the second porous web of material are made of an air-permeable material, in particular a fleece material, and have a permeability to air which is greater than the permeability to air of a wrapping paper web.
  • the device according to aspects of the invention is also set up in particular to carry out the method according to aspects of the invention.
  • FIG. 1 shows a schematic representation of a device 2 in the tobacco processing industry for connecting a first porous material web 4, which runs out in a conveying direction T, to a second porous material web 6.
  • the material webs 4, 6 and 24 mentioned below are always porous material webs, too unless they are expressly designated as porous.
  • the first web of material 4 is wound onto a first bobbin 8 which is held by a first receptacle 10 .
  • the second web of material 6 is present on a second bobbin 12 which is held on a second receptacle 14 .
  • the two reels 8, 12 each hold a material web 4, 6 of finite length.
  • the first material web 4 is transported in a conveying plane E with a transport means, not shown, and fed in the conveying direction T for further processing.
  • the device 2 comprises a schematically illustrated cutting device 16 for cutting a free trailing end 18 of the first material web 4 and a free leading end 20 of the second material web 6.
  • the device 2 also includes a connecting device 22 for connecting the two cut free ends 18, 20 of the first and second web of material 4, 6 of finite length to form an endlessly long web of material 24, forming an area of overlap 26. Endless webs of material joined according to methods known in the art are shown in Figs 2 shown.
  • the transport means can be designed for transporting the material webs 4, 6, 24 together or separately.
  • the material webs 4, 6 of finite length or their drive means can preferably be controlled separately in order to position the free ends 18, 20 to be connected, for example in the area of a support surface 28, one above the other or below one another to form the overlapping area 26 in the conveying direction T, offset from one another.
  • the receptacles 10, 14 for the reels 8, 12 can be pins, mandrels or shafts, which can be designed to be stationary or driven.
  • the material webs 4, 6, 24 can also be guided over deflection and/or guide rollers 30 for deflecting and/or guiding the individual material webs 4, 6, 24.
  • the guide roller 30 shown as an example and further guide rollers that are optionally present and not shown can also be designed as transport rollers.
  • the device 2 comprises the connecting device 22 which is designed and set up to form the overlapping area 26 and which is provided with at least one opening 32 over the entire width B of the endless web of material 24 .
  • the overlapping area 26 can be formed with reduced material and an accumulation of material in the overlapping area 26 can be avoided.
  • an opening 32 is always understood to mean an opening that has a surface area of more than 1 mm 2 .
  • FIG. 2 shows, in a schematically simplified plan view, two endless webs of material 24, which are formed by connecting the free ends 18, 20 of a first and a second web of material 4, 6.
  • the Endless Webs of material 24 are made using conventional devices and methods known in the art. The following explanations are given bearing in mind that the techniques known from the prior art are not suitable for connecting porous webs of material.
  • a trailing free end 18 of the first material web 4 overlaps the second material web 6 in the overlapping region 26 up to a limit predetermined by the leading free end 20 thereof. This applies to both the in 2 left as well as for the in 2 Endless material web 24 shown on the right.
  • the free ends 18, 20 of the material webs 4, 6 are cut in a complementary manner, which means that the free ends 18, 20 when connecting the material webs 4, 6 over the entire width B of the endless material web 24 form a closed overlapping area 26 . As a result, an accumulation of material occurs in the overlapping area 26 .
  • the cutting device 16 according to the invention for cutting the free ends 18, 20 of the material webs 4, 6 is designed in such a way that accumulations of material in the overlapping area 26 can be compensated for.
  • the Overlap area 26 to compensate for material accumulations that otherwise occur in this area has at least one opening 32 .
  • the side edges of the overlapping area 26 can, as in 3 shown, be open or closed.
  • the number of openings 32 and overlapping zones 34 can vary as desired.
  • the cut edges, ie the cuts at the trailing free end 18 of the first material web 4 and at the leading free end 20 of the second material web 6, can be of any shape.
  • a sinusoidal course of the cut edges is shown as an example. The sinusoidal progression of the cuts is phase-shifted by 180°.
  • non-complementary means that the cut flat webs do not complement each other to form a closed surface when they are pushed against one another in one plane with their cut edges. This is the only way to create overlapping zones 34 and openings 32 .
  • Adhesive pads 40 are located in the overlapping zones 34 to connect the free ends 18, 20 of the material webs 4, 6.
  • the adhesive pads 40 used are adhesive pads 40 without carrier material. Unlike, for example, a double-sided adhesive tape, they do not include any carrier material. They consist only of the adhesive itself.
  • the connecting device 22 can also be equipped with an in 1 not shown pressing device for connecting the free ends 18, 20 of the material webs 4, 6 may be provided.
  • a pair of rollers, for example, is suitable for this purpose, which presses the material webs 4, 6 together from below and above, in particular in the overlapping area 26.
  • a reliable connection of the material webs 4, 6 in the overlapping zones 34, mediated by the adhesive pads 40, can thus be achieved.
  • the cutting device 16 can also have a cutting or punching device, with which, in addition to the in 3 shown breakthroughs 32 further breakthroughs in the two material webs 4, 6 are introduced. In this way, the material present in the overlapping area can be further reduced in order to avoid an accumulation of material.
  • the adhesive pad 40 is preferably applied to the second web of material 6 and this is then connected to the trailing free end 18 of the first web of material 4 . Conversely, however, it is also possible to apply the adhesive pad 40 to the first material web 4 or even to apply adhesive pads 40 to both material webs 4 , 6 .
  • FIG 5 shows the cutting device 22 in a schematic perspective view, which comprises a splicing die 42 and a splicing table 44 .
  • the splicing die 42 and the splicing table 44 have cooperating, wavy-shaped knives 38 to produce the cutting edges shaped as desired.
  • the splicing table 44 By the splicing table 44 being moved in the direction of the splicing stamp 42 and the two parts of the blade 38 interacting or engaging, a material web 4, 6 resting on the support surface 28 is cut.
  • the splicing die 42 of the cutting device 16 comprises a first support surface 28a for contacting the outgoing first web of material 4 and a second support surface 28b for contacting the second web of material 6.
  • the support surfaces are denoted jointly by reference numerals 28.
  • Both support surfaces 28a, 28b are each equipped with a fluid dynamic gripper 46 for holding the first and second material web 4, 6, respectively.
  • the fluid dynamic gripper 46 and its mode of operation are described in detail in connection with 9 explained
  • FIG. 6 shows a further perspective view of the splicing die 42.
  • the outgoing first web of material 4 and the incoming second web of material 6 are indicated.
  • the fluid dynamic grippers 46 in the support surfaces 28a, 28b are also shown.
  • the adhesive application device 48 includes, for example, three adhesive dispensers 49, in each of which the adhesive transfer tape is accommodated. If the adhesive transfer tape has been used up, the entire adhesive dispenser 49, of which only one is provided with reference numbers for reasons of clarity, can be exchanged and refilled.
  • the adhesive application device 48 is also set up, as indicated by a double arrow, to be moved out in a travel direction 54 in order to apply the adhesive pads 40 . Otherwise, the adhesive application device 48 is located, for example, behind a rear wall 60 and is advanced through a corresponding opening.
  • the adhesive dispensers 49 are located on a corresponding support arm 51, which can be moved in the travel direction 54 indicated by the double arrow. To apply the adhesive pads 40, the adhesive rollers 49 are moved according to a rolling movement in the direction indicated by the arrow 50.
  • Figures 8a and 8b schematically show different states of an alternative adhesive application device 48.
  • This comprises a transfer roller 52, by which the adhesive pads 40 can be applied to the upper side of the second material web 6, for example.
  • Below the support surface 28 is indicated schematically.
  • the transfer roller 52 like the carrier arm 51, can be moved in a direction of travel 54.
  • Figure 8a shows the application of the adhesive pads 40 to the material web 6.
  • the transfer roller 52 is in the application position.
  • Figure 8b shows the application of the adhesive pads 40 to the transfer roller 52, which is in the pick-up position.
  • the direction of travel 54 is oriented at least approximately parallel to an axial direction of the transfer roller.
  • Applying the adhesive pads 40 to the transfer roller 52 may vary from the embodiment in FIG 7 , in which several (example three) adhesive dispensers 49 are used, only a single adhesive dispenser 49 is used. If a single adhesive dispenser 49 is used, multiple adhesive pads 40 can be applied to different positions of the transfer roller 52 by multiple unrolling movements and stepwise movement of the transfer roller 52 in the direction of travel 54 . If several adhesive rollers 49 are present, the adhesive pads 40 are transferred from the adhesive rollers 49 to the transfer roller 52 at the same time. Subsequently, the transfer roller 52 is extended through an opening 56 in the rear wall 60 for the application of the adhesive pads 40 .
  • the transfer roller 52 is preferably designed in such a way that it is made up of several partial rollers (e.g. three partial rollers if three adhesive pads 40 are to be applied), the partial rollers being optionally freely rotatable and blockable and are mounted on a common axis. Depending on the number of adhesive pads 40 to be transferred, a corresponding number of partial rollers is provided. If several adhesive dispensers 49 are used, a single transfer roller 52 is sufficient.
  • an adhesive for example hot glue or another viscous to highly viscous glue or adhesive, can also be applied to the transfer roller 52. This forms adhesive pads 40 on the transfer roller 52, which are then applied.
  • the support surface 28 of the cutting device 16 can be designed to be movable in the direction of the transfer roller 52 or in the direction of the adhesive dispenser 49 .
  • the material web 4, 6 is moved by this movement in the direction of the transfer roller 52 or the adhesive dispenser 49, so that the at least one adhesive pad 40 can be applied to the end 18, 20 of the first and/or second material web 4, 6.
  • FIG. 9 shows a sectional view through a fluid dynamic gripper 46, which is preferably round in plan view (cf., for example, figure 5 and 6 ).
  • This has two connections 58, 59 through which it can be supplied with compressed air.
  • the air flow passes through a supply channel 63 into a distribution chamber 61 and leaves the distribution chamber 61, as indicated by arrows, through an outflow gap 62.
  • the outflow gap 62 is, for example, circular when viewed in a plane of the support surface 28.
  • the compressed air supplied via the connections 58, 59 leaves the outflow gap 62 at high speed and flows from there, as also indicated by arrows, between a material web 4, 6 and a support surface 28 of the splicing table.
  • Figure 10a shows a schematically simplified plan view of a strip-shaped fluid dynamic gripper 46, as can be integrated, for example, in a support surface 28 of a connecting device 22.
  • Figure 10b shows a schematically simplified sectional view through this strip-shaped fluid dynamic gripper 46 along the line BB in Figure 10a ).
  • this also has a connection 58 through which the gripper 46 can be supplied with compressed air.
  • the air flow arrives from the connection 58 through the supply channel 63 into the distribution chamber 61, and leaves the distribution chamber 61 through an outflow gap 62.
  • the outflow gap 62 is delimited by a central body 64 and the main body 66 surrounding it.
  • the strip-shaped fluid-dynamic gripper 46 is designed in such a way that the outflow gap 62 has straight sections 68 lying opposite one another and running at least approximately parallel to one another.
  • the straight sections 68 of the outflow gap 62 are connected to one another, for example, by arcuate gap sections 70 .
  • the air Due to the elongated configuration of the outflow gap 62 , the air essentially flows out at the straight sections 68 .
  • the exiting air flow is given a preferred direction in this way; it no longer spreads out from the gripper 46 in the entire plane of the support surface 28, but preferably in directions perpendicular to the straight sections 68.
  • this can be prevented be that in an embodiment in which more than one fluid dynamic gripper 46 is provided per support surface 28, the air flows of the gripper 46 impede each other and consequently the gripper 46 impair each other in their effect.
  • several strip-shaped fluid dynamic grippers 46 could be arranged in a row next to one another.

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  • Replacement Of Web Rolls (AREA)
EP22179276.5A 2021-06-21 2022-06-15 Dispositif et processus de l'industrie de transformation du tabac permettant de relier deux bandes de matière Pending EP4116244A1 (fr)

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DE102021115984.9A DE102021115984A1 (de) 2021-06-21 2021-06-21 Vorrichtung und Verfahren der Tabak verarbeitenden Industrie zum Verbinden zweier Materialbahnen

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EP4116244A1 true EP4116244A1 (fr) 2023-01-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140768A1 (de) 1980-12-22 1982-07-29 G.D S.p.A., 40100 Bologna Verfahren und vorrichtung zum ersetzen einer ersten, geleerten spule eines streifenmaterials durch eine zweite, neue spule
WO2015185887A1 (fr) * 2014-06-05 2015-12-10 British American Tobacco (Investments) Ltd Ensemble de fourniture de papier de manchette pour l'utilisation dans la fabrication d'articles à fumer
DE102014018818A1 (de) 2014-12-19 2016-06-23 Hauni Maschinenbau Ag Vorrichtung und Verfahren zum Verbinden von zwei Streifen eines Bahnmaterials in einer Maschine der Tabak verarbeitenden Industrie
CN108069276A (zh) * 2016-11-17 2018-05-25 昆明鼎承科技有限公司 一种卷烟用包装带材的连接装置
EP3757046A1 (fr) 2019-06-26 2020-12-30 Hauni Maschinenbau GmbH Dispositif et procédé de raccordement de deux bandes de matière se déroulant d'une bobine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140768A1 (de) 1980-12-22 1982-07-29 G.D S.p.A., 40100 Bologna Verfahren und vorrichtung zum ersetzen einer ersten, geleerten spule eines streifenmaterials durch eine zweite, neue spule
WO2015185887A1 (fr) * 2014-06-05 2015-12-10 British American Tobacco (Investments) Ltd Ensemble de fourniture de papier de manchette pour l'utilisation dans la fabrication d'articles à fumer
DE102014018818A1 (de) 2014-12-19 2016-06-23 Hauni Maschinenbau Ag Vorrichtung und Verfahren zum Verbinden von zwei Streifen eines Bahnmaterials in einer Maschine der Tabak verarbeitenden Industrie
CN108069276A (zh) * 2016-11-17 2018-05-25 昆明鼎承科技有限公司 一种卷烟用包装带材的连接装置
EP3757046A1 (fr) 2019-06-26 2020-12-30 Hauni Maschinenbau GmbH Dispositif et procédé de raccordement de deux bandes de matière se déroulant d'une bobine

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