EP3733576B1 - Device and method for coiling a film on a packaging machine - Google Patents

Device and method for coiling a film on a packaging machine Download PDF

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Publication number
EP3733576B1
EP3733576B1 EP20160698.5A EP20160698A EP3733576B1 EP 3733576 B1 EP3733576 B1 EP 3733576B1 EP 20160698 A EP20160698 A EP 20160698A EP 3733576 B1 EP3733576 B1 EP 3733576B1
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EP
European Patent Office
Prior art keywords
reception
mandrel
sleeve
receiving
engagement structures
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.)
Active
Application number
EP20160698.5A
Other languages
German (de)
French (fr)
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EP3733576A1 (en
Inventor
Albert Gabler
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.)
Multivac Sepp Haggenmueller GmbH and Co KG
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Multivac Sepp Haggenmueller GmbH and Co KG
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Publication of EP3733576A1 publication Critical patent/EP3733576A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/22—Constructional details collapsible; with removable parts
    • B65H75/2218—Collapsible hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/02—Supporting web roll
    • B65H18/026—Cantilever type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/04—Kinds or types
    • B65H75/08—Kinds or types of circular or polygonal cross-section
    • B65H75/10—Kinds or types of circular or polygonal cross-section without flanges, e.g. cop tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/246—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by relative rotation around the supporting spindle or core axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/40—Holders, supports for rolls
    • B65H2405/42—Supports for rolls fully removable from the handling machine
    • B65H2405/421—Supports for rolls fully removable from the handling machine and serving also as package

Definitions

  • the invention relates to the winding of a film on a packaging machine.
  • Film webs are processed in packaging machines, such as tray sealing machines or thermoforming packaging machines.
  • packaging is closed by sealing on a film supplied as a film web.
  • a residual film grid can remain from the supplied film web, which is wound up on a winding device and then removed from the packaging machine as a roll.
  • Such winders generally have a rotatable take-up mandrel around which the film winds. In general, it must be ensured that the roll created during winding can then still be pulled off the receiving mandrel.
  • a device for winding a film on a packaging machine according to the preamble of claim 1 is known.
  • the residual film lattice is not wound up directly onto the receiving mandrel, but rather a receiving sleeve that can be pushed onto the receiving mandrel is provided in order to receive the film.
  • the receiving sleeve comprises link elements which are pivotably connected to one another by means of hinges aligned parallel to a central axis of the receiving sleeve.
  • the arbor includes clamping means in the form of paddles, which can be adjusted in the radial expansion of the arbor in order to be able to clamp the attached receiving sleeve with a torque.
  • the receiving sleeve Due to the torque-resistant clamping, the receiving sleeve is rotated with the receiving mandrel and the film scrap skeleton can be wound up. If the resulting roll is then to be removed, the clamping means of the holding mandrel are folded radially inwards, so that the holding sleeve with the roll rolled up on it can be pulled off the holding mandrel axially. Subsequently, segments of the receiving sleeve can be folded inwards towards the central axis of the receiving sleeve due to the hinge connections, so that the receiving sleeve is converted from a substantially cylindrical configuration into a folded, unstable configuration in which it can be removed from the film roll.
  • the receiving sleeve can then be reused for winding up another roll of film.
  • the provision of the receiving sleeve makes it easier to pull the unwound film roll off the receiving mandrel.
  • the receiving sleeve can absorb and/or evenly distribute compression forces when the film is being wound up, thus increasing the stability of the device.
  • a disadvantage of the known system is the complex structure of the holding mandrel with the clamping means, which can be adjusted in the radial expansion of the holding mandrel, for torque-resistant clamping of the holding sleeve.
  • the clamping means can be damaged due to the high compression forces that occur particularly when winding up very elastic films.
  • the operation is also comparatively complex, since the clamping means have to be adjusted when the receiving sleeve is attached to and removed from the receiving mandrel.
  • a further difficulty is the correct setting of the clamping elements, so that on the one hand a torque-proof clamping of the receiving sleeve is ensured, but on the other hand no excessive loads act on the clamping elements.
  • the receiving sleeve is formed by segments arranged next to one another along a circumference of the receiving sleeve. Adjacent segments of the receiving sleeve are pivotally connected to one another.
  • the arbor is formed as a rigid body having engagement structures.
  • the engagement structures are configured to interact with shaped features of an inner circumference of the receiving sleeve when the receiving sleeve is placed on the receiving mandrel, so that a rotation of the receiving mandrel about the axis of rotation of the receiving mandrel causes the receiving sleeve to rotate as well.
  • the film in particular a residual film lattice, can be wound onto the receiving sleeve placed on the receiving mandrel.
  • the film roll wound up in this way can be removed by removing the mandrel from the receiving sleeve.
  • Forming the receiving sleeve from segments which are pivotably connected to one another facilitates the removal of the receiving sleeve from the inner circumference of the film roll after the receiving sleeve has been pulled off the receiving mandrel.
  • the interaction of the engagement structures of the receiving mandrel with the shape features of the inner circumference of the receiving sleeve allows a non-rotatable connection between the receiving sleeve and the receiving mandrel even without the provision of movable clamping elements reach, so that the receiving sleeve is rotated when turning the arbor.
  • the holding mandrel with the engagement structures as a rigid body, the device becomes particularly stable and can easily withstand the high compression forces that occur when highly elastic foils are wound up.
  • With the rigid engagement structures on the accommodating mandrel it is ensured in a simple manner without further measures by the operator that the accommodating sleeve that is attached rotates as well.
  • adjacent segments of the receiving sleeve are preferably connected to one another about pivot axes which run parallel to the axis of rotation of the receiving mandrel. This makes it possible to bring the receiving sleeve into an unstable configuration after removing the receiving sleeve from the receiving mandrel by pivoting segments of the receiving sleeve towards an interior of the receiving sleeve, in which it can be folded up and removed from the inside of the wound roll.
  • the engagement structures of the arbor run parallel to the axis of rotation of the arbor.
  • the engagement structures are symmetrically distributed along a circumference of the arbor. This achieves a uniform transmission of force between the accommodating sleeve and arbor. In addition, it is possible to slide the receiving sleeve onto the receiving mandrel in different rotational orientations.
  • a particularly good and evenly distributed transmission of force between the accommodating sleeve and the accommodating mandrel is achieved if at least four engagement structures are provided along the circumference of the accommodating mandrel.
  • the number of engagement structures preferably corresponds to the number of segments of the receiving sleeve.
  • the segments of the receiving sleeve can thus be adapted particularly well to the shape of the receiving mandrel by pivoting relative to adjacent segments.
  • the engagement structures are designed as projections and/or as ribs of the receiving mandrel. Structures of this type are easy to produce and are well suited for interacting with shape features of the inner circumference of the receiving sleeve.
  • the engagement structures of the arbor and the shape features of the inner circumference of the accommodating sleeve can have mutually corresponding shapes.
  • the engagement structures and the shape features have mutually complementary shapes. This allows a good power transmission to be achieved.
  • the shape features of the inner circumference of the receiving sleeve, with which the engagement structures of the receiving mandrel interact can be defined by the mutual arrangement of the segments of the receiving sleeve.
  • adjacent segments of the receiving sleeve can be at a specific angle to one another when the receiving sleeve is in the attached state. This angle may define a feature of the inner periphery of the receiving sleeve which is engaged by an engagement structure of the receiving mandrel.
  • the engagement structures of the receiving mandrel can also be defined by the shape of the individual segments of the receiving sleeve.
  • the segments of the receiving sleeve can have a specific surface profile on their side directed towards an interior of the receiving sleeve, into which the engagement structures can engage.
  • a retainer is provided that is configured to secure an axial position of the locating sleeve on the arbor. This can prevent the receiving sleeve from becoming detached from the receiving mandrel when the receiving mandrel is rotated.
  • the fuse can be, for example, an elastic element provided on the receiving mandrel.
  • an elastic element could be, for example, an O-ring, a silicone ring or a spring washer.
  • the elastic element could be present between an outer circumference of the receiving mandrel and the inner circumference of the receiving sleeve.
  • the elastic element could oppose an axial movement of the receiving sleeve on the receiving mandrel with a certain holding force.
  • the holding force is preferably selected in such a way that the receiving sleeve does not come loose by itself during operation, but it is still possible for an operator to remove the receiving sleeve (in particular with the film wound up on it).
  • the safeguard could also include a wedge system.
  • the wedge system could, for example, comprise one or more wedges which are pushed at least partially between the arbor and the accommodating sleeve fitted thereon and thus secure the accommodating sleeve in an axial direction.
  • the invention also includes a method for winding a film on a packaging machine.
  • the device according to the invention is suitable, designed and configured for carrying out the method. Features described in relation to the device can be transferred to the method and vice versa.
  • a method for winding up a film on a packaging machine comprises slipping a receiving sleeve onto a receiving mandrel designed as a rigid body with engagement structures.
  • the receiving sleeve is formed by segments arranged next to one another along a circumference of the receiving sleeve, with adjacent segments being pivotably connected to one another.
  • the engagement structures are designed as projections and/or as ribs.
  • the arbor is driven to rotate about an axis of rotation to which the engagement structures are parallel.
  • the engagement structures of the holding mandrel interact with shape features of an inner circumference of the mounted holding sleeve in such a way that the rotation of the holding mandrel about the axis of rotation causes the holding mandrel to rotate as well, with the film being wound onto the holding mandrel.
  • the method also includes securing an axial position of the locating sleeve on the arbor with a retainer.
  • the fuse can, for example, comprise an elastic element provided on the receiving ring, in particular an O-ring, a silicone ring or a spring ring.
  • the safeguard can also include a wedge system.
  • the receiving sleeve with the wound film can be pulled off the receiving mandrel.
  • a configuration of the receiving sleeve can then be changed in such a way that it can be removed from the wound film roll.
  • the packaging machine 1 shows an example of a packaging machine 1 with a device 3 according to the invention for winding up a film 5.
  • the packaging machine 1 is shown as a tray sealing machine. This has a feed belt 7 with which filled shells are conveyed to a closing station 9 . The shells are transferred to the closing station 9 with a gripper device 11 and closed there with a cover film 5 (foil) fed from above by sealing the cover film 5 on. The finished packs are transferred from the closing station 9 to a discharge belt 15 via the gripper system 11 .
  • cover film 5 After the cover film 5 has been sealed on, areas of the cover film 5 corresponding to the packages or composite packaging are cut out of the web of cover film 5 in the sealing station 9 . A residual film lattice of the cover film 5 remains, which is wound up with the device 3 for winding up the film 5 .
  • the device 3 shows a schematic view of the device 3 for winding up the film 5.
  • the device 3 comprises a receiving mandrel 17, which is arranged to be rotatable about an axis of rotation D by means of a drive device 19.
  • a receiving sleeve 21 is attached to the receiving mandrel 17 .
  • the receiving sleeve 21 rotates with the receiving mandrel 17, the film 5 being wound onto the receiving sleeve 21.
  • the receiving sleeve 21 comprises a multiplicity of segments 23 which extend parallel to the axis of rotation D. Adjacent segments 23 are pivotally connected to one another, with the corresponding pivot axes S also running parallel to the axis of rotation D of the receiving mandrel 17 .
  • the receiving mandrel 17 is designed as a rigid body which has engagement structures 25 .
  • the substantially cylindrical receiving mandrel 17 comprises grooves extending parallel to its axis of rotation D, between which rib-shaped elevations are defined, which form the engagement structures 25 .
  • the receiving sleeve 21 can be pushed onto the receiving mandrel 17 parallel to the axis of rotation D of the receiving mandrel 17 .
  • a stop 27 (for example in the form of a grub screw) is provided on the receiving mandrel 17 and defines a possible end position of the receiving sleeve 21 when it is pushed onto the receiving mandrel 17 .
  • the fuse comprises an elastic element 29 which is ring-shaped and extends around the outer circumference of the arbor 17 .
  • the elastic element 29 can in particular be accommodated in a groove of the receiving mandrel 17 .
  • the elastic element 29 lies between an outer circumference of the receiving mandrel 17 and an inner circumference of the receiving sleeve 21 and counteracts an axial sliding down of the receiving sleeve 21 from the receiving mandrel 17 .
  • the securing device can also comprise a wedge system 31, which can have one or more wedges which, after the receiving sleeve 21 has been pushed onto the receiving mandrel 17, can be pushed at least partially between the receiving mandrel 17 and the receiving sleeve 21 in order to adjust the axial position of the To secure receiving sleeve 21 on the receiving mandrel 17.
  • the resulting film roll can be pulled off the receiving mandrel 17 together with the receiving sleeve 21 .
  • the wedge system 31 can first be removed.
  • the receiving sleeve 21 can then be pulled off with the roll of film, if necessary by overcoming the retaining force of the elastic element 29 .
  • the segments 23 of the receiving sleeve 21 are formed by link elements, each of which has two receiving openings 33 extending parallel to the axis of rotation D include. Adjacent segments 23 are nested along a circumference of receiving sleeve 21 such that corresponding openings 33 of adjacent segments 23 overlap and form a common receiving opening for bolts or rods 34 (only two shown) which pivotally connect adjacent segments 23 together.
  • the receiving sleeve 21 comprises twenty segments 23. Due to the relatively high number of segments 23, the shape of the receiving sleeve 21 can be adapted relatively well to the shape of the receiving mandrel 17, in particular a substantially cylindrical shape. However, a different number of segments 23 would also be conceivable.
  • the segments 23 are shaped on their inward-facing side in such a way that they each have inward-pointing bulges 35 and, compared to the bulges 35 , regions 37 that protrude less far inwards.
  • This shape of the individual segments 23 results in an overall uneven inner circumference for the receiving sleeve 21 .
  • Shape features 39 of the inner circumference of receiving sleeve 21 are thus formed by the shape of segments 23 .
  • the engagement structures 25 of the receiving mandrel 17 are designed in such a way that they interact with the shaped features 39 of the inner circumference of the receiving sleeve 21 so that a rotation of the receiving mandrel 17 about the axis of rotation D causes the receiving sleeve 21 to rotate as well.
  • the engagement structures 25 of the holding mandrel 17 are designed in the form of ribs for this purpose, which extend parallel to the axis of rotation D of the holding mandrel 17 .
  • the bolts or rods 34 are preferably also provided in the openings 33 of the segments 23 of the receiving sleeve 21 with play. If the film 5 is now wound up by rotating the take-up mandrel 17, a radially inward-acting pressure is exerted from the outside on the take-up sleeve 21, so that it fits even better to the take-up mandrel 17 due to the play of the bolts or rods 34 in the openings 33 and whose engagement structures 25 applies, so that the power transmission between the arbor 17 and of the receiving sleeve 21 is improved.
  • the segments 23 mutually stabilize one another as a result of the external pressure, so that the overall shape of the receiving sleeve 21 is stabilized. This ensures that the receiving sleeve 21 can still be pulled off the receiving mandrel 17 in the axial direction even after the film 5 has been wound up.
  • FIG. 5 shows in to the view 4
  • An analogous perspective shows an exemplary alternative embodiment of the receiving mandrel 17 and the receiving sleeve 21.
  • the segments 23 of the receiving sleeve 21 are formed by flat plates extending parallel to the axis of rotation D of the receiving mandrel 17. Adjacent segments 23 in turn have overlapping openings 33 for receiving bolts or rods 34 so that the adjacent segments 23 are pivotally connected to each other.
  • an inner circumference of the receiving sleeve 21 is in the form of a polygon. The corners of the polygon form features 39 of the inner circumference of the receiving sleeve 21 for force transmission between the receiving mandrel 17 and the receiving sleeve 21.
  • the receiving mandrel 17 is equipped with a corresponding polygon-shaped circumference.
  • the corners of this polygonal circumference form engagement structures 25 for engaging in the shaped features 39 of the receiving sleeve 21.
  • 6 12 shows the receiving sleeve 21 of the embodiment figure 5 after the film 5 has been rolled up and the receiving sleeve 21 with the film roll has been pulled off the receiving mandrel 17. Due to the pivotability of adjacent segments 23 of the receiving sleeve 21, the receiving sleeve 21 can be converted into an unstable configuration in the pulled-off state, in which it can be removed from the interior of the film roll is. As in 6 shown, for this purpose segments 23 of the receiving sleeve 21 are pivoted inwards on a central axis of the receiving sleeve 21 . A removal of the receiving sleeve 21 is based on the same principle for the embodiment of Figures 2 to 4 possible.

Description

Die Erfindung betrifft das Aufwickeln einer Folie an einer Verpackungsmaschine.The invention relates to the winding of a film on a packaging machine.

In Verpackungsmaschinen, wie beispielsweise Schalenverschließmaschinen oder Tiefziehverpackungsmaschinen, werden Folienbahnen verarbeitet. Beispielsweise werden Verpackungen durch Ansiegeln einer als Folienbahn zugeführten Folie verschlossen. Bei einem solchen Vorgang kann von der zugeführten Folienbahn ein Folienrestgitter übrigbleiben, welches an einer Aufwickeleinrichtung aufgewickelt und anschließend als Rolle von der Verpackungsmaschine entnommen wird. Solche Aufwickeleinrichtungen weisen im Allgemeinen einen drehbaren Aufnahmedorn auf, um den sich die Folie wickelt. Generell muss sichergestellt werden, dass die beim Aufwickeln entstehende Rolle anschließend noch von dem Aufnahmedorn abgezogen werden kann.Film webs are processed in packaging machines, such as tray sealing machines or thermoforming packaging machines. For example, packaging is closed by sealing on a film supplied as a film web. In such a process, a residual film grid can remain from the supplied film web, which is wound up on a winding device and then removed from the packaging machine as a roll. Such winders generally have a rotatable take-up mandrel around which the film winds. In general, it must be ensured that the roll created during winding can then still be pulled off the receiving mandrel.

Aus der EP 3 214 031 A1 ist eine Vorrichtung zum Aufwickeln einer Folie an einer Verpackungsmaschine gemäß dem Oberbegriff von Anspruch 1 bekannt. Hierbei wird das Folienrestgitter nicht direkt auf den Aufnahmedorn aufgewickelt, sondern es ist eine auf den Aufnahmedorn aufschiebbare Aufnahmehülse vorgesehen, um die Folie aufzunehmen. Die Aufnahmehülse umfasst Gliederelemente, die mittels parallel zu einer Mittelachse der Aufnahmehülse ausgerichteten Scharnieren verschwenkbar miteinander verbunden sind. Der Aufnahmedorn umfasst Spannmittel in Form von Paddeln, die in radialer Ausdehnung des Aufnahmedorns verstellt werden können, um die aufgesteckte Aufnahmehülse drehmomentfest spannen zu können. Durch die drehmomentfeste Spannung wird die Aufnahmehülse mit dem Aufnahmedorn mitgedreht und das Folienrestgitter kann aufgewickelt werden. Soll die entstandene Rolle anschließend entnommen werden, werden die Spannmittel des Aufnahmedorns radial nach innen geklappt, so dass die Aufnahmehülse mit der darauf aufgerollten Rolle axial von dem Aufnahmedorn abgezogen werden kann. Anschließend können Segmente der Aufnahmehülse aufgrund der Scharnierverbindungen nach innen in Richtung zu der Mittelachse der Aufnahmehülse hin geklappt werden, so dass die Aufnahmehülse von einer im Wesentlichen zylinderförmigen Konfiguration in eine eingeklappte, instabile Konfiguration überführt wird, in der sie aus der Folienrolle entnehmbar ist. Die Aufnahmehülse kann anschließend für das Aufwickeln einer weiteren Folienrolle wiederverwendet werden. Durch das Vorsehen der Aufnahmehülse wird das Abziehen der abgewickelten Folienrolle von dem Aufnahmedorn erleichtert. Zudem kann die Aufnahmehülse beim Aufwickeln der Folie Kompressionskräfte aufnehmen und/oder gleichmäßig verteilen und erhöht damit die Stabilität der Vorrichtung.From the EP 3 214 031 A1 a device for winding a film on a packaging machine according to the preamble of claim 1 is known. In this case, the residual film lattice is not wound up directly onto the receiving mandrel, but rather a receiving sleeve that can be pushed onto the receiving mandrel is provided in order to receive the film. The receiving sleeve comprises link elements which are pivotably connected to one another by means of hinges aligned parallel to a central axis of the receiving sleeve. The arbor includes clamping means in the form of paddles, which can be adjusted in the radial expansion of the arbor in order to be able to clamp the attached receiving sleeve with a torque. Due to the torque-resistant clamping, the receiving sleeve is rotated with the receiving mandrel and the film scrap skeleton can be wound up. If the resulting roll is then to be removed, the clamping means of the holding mandrel are folded radially inwards, so that the holding sleeve with the roll rolled up on it can be pulled off the holding mandrel axially. Subsequently, segments of the receiving sleeve can be folded inwards towards the central axis of the receiving sleeve due to the hinge connections, so that the receiving sleeve is converted from a substantially cylindrical configuration into a folded, unstable configuration in which it can be removed from the film roll. The receiving sleeve can then be reused for winding up another roll of film. The provision of the receiving sleeve makes it easier to pull the unwound film roll off the receiving mandrel. In addition, the receiving sleeve can absorb and/or evenly distribute compression forces when the film is being wound up, thus increasing the stability of the device.

Nachteilig an dem bekannten System ist der komplexe Aufbau des Aufnahmedorns mit den in radialer Ausdehnung des Aufnahmedorns verstellbaren Spannmitteln zum drehmomentfesten Spannen der Aufnahmehülse. Zudem können die Spannmittel aufgrund der insbesondere beim Aufwickeln von sehr elastischen Folien auftretenden hohen Kompressionskräfte beschädigt werden. Auch die Bedienung ist vergleichsweise aufwändig, da beim Aufbringen und Entfernen der Aufnahmehülse auf den Aufnahmedorn jeweils die Spannmittel verstellt werden müssen. Eine weitere Schwierigkeit ist das korrekte Einstellen der Spannelemente, so dass einerseits ein drehmomentfestes Spannen der Aufnahmehülse gewährleistet ist, andererseits aber keine zu hohen Belastungen auf die Spannelemente wirken.A disadvantage of the known system is the complex structure of the holding mandrel with the clamping means, which can be adjusted in the radial expansion of the holding mandrel, for torque-resistant clamping of the holding sleeve. In addition, the clamping means can be damaged due to the high compression forces that occur particularly when winding up very elastic films. The operation is also comparatively complex, since the clamping means have to be adjusted when the receiving sleeve is attached to and removed from the receiving mandrel. A further difficulty is the correct setting of the clamping elements, so that on the one hand a torque-proof clamping of the receiving sleeve is ensured, but on the other hand no excessive loads act on the clamping elements.

Es ist Aufgabe der Erfindung, das Aufwickeln einer Folie an einer Verpackungsmaschine in Bezug auf einfache Bedienbarkeit und geringen Wartungsaufwand mit möglichst einfachen Mitteln zu verbessern.It is the object of the invention to improve the winding of a film on a packaging machine in terms of ease of use and low maintenance with the simplest possible means.

Diese Aufgabe wird jeweils durch den Gegenstand von Anspruch 1 oder durch den Gegenstand von Anspruch 11 gelöst.This object is solved by the subject matter of claim 1 or by the subject matter of claim 11, respectively.

Eine erfindungsgemäße Vorrichtung zum Aufwickeln einer Folie an einer Verpackungsmaschine umfasst einen zu einer Drehung um eine Drehachse antreibbaren Aufnahmedorn und eine Aufnahmehülse für die Folie zum Aufstecken auf den Aufnahmedorn. Die Aufnahmehülse ist von entlang eines Umfangs der Aufnahmehülse nebeneinander angeordneten Segmenten gebildet. Benachbarte Segmente der Aufnahmehülse sind schwenkbar miteinander verbunden. Der Aufnahmedorn ist als starrer Körper ausgebildet, der Eingriffstrukturen aufweist. Die Eingriffstrukturen sind dazu konfiguriert, bei auf den Aufnahmedorn aufgesteckter Aufnahmehülse mit Formmerkmalen eines Innenumfangs der Aufnahmehülse zusammenzuwirken, so dass eine Drehung des Aufnahmedorns um die Drehachse des Aufnahmedorns ein Mitdrehen der Aufnahmehülse bewirkt. Somit kann durch Drehen des Aufnahmedorns die Folie, insbesondere ein Folienrestgitter, auf die auf den Aufnahmedorn aufgesteckte Aufnahmehülse aufgewickelt werden. Durch Abziehen des Aufnahmedorns von der Aufnahmehülse lässt sich die so aufgewickelte Folienrolle entnehmen. Das Ausbilden der Aufnahmehülse aus schwenkbar miteinander verbundenen Segmenten erleichtert das Entfernen der Aufnahmehülse aus dem Innenumfang der Folienrolle nach dem Abziehen der Aufnahmehülse von dem Aufnahmedorn.A device according to the invention for winding up a film on a packaging machine comprises a receiving mandrel that can be driven to rotate about an axis of rotation and a receiving sleeve for the film to be pushed onto the receiving mandrel. The receiving sleeve is formed by segments arranged next to one another along a circumference of the receiving sleeve. Adjacent segments of the receiving sleeve are pivotally connected to one another. The arbor is formed as a rigid body having engagement structures. The engagement structures are configured to interact with shaped features of an inner circumference of the receiving sleeve when the receiving sleeve is placed on the receiving mandrel, so that a rotation of the receiving mandrel about the axis of rotation of the receiving mandrel causes the receiving sleeve to rotate as well. Thus, by rotating the receiving mandrel, the film, in particular a residual film lattice, can be wound onto the receiving sleeve placed on the receiving mandrel. The film roll wound up in this way can be removed by removing the mandrel from the receiving sleeve. Forming the receiving sleeve from segments which are pivotably connected to one another facilitates the removal of the receiving sleeve from the inner circumference of the film roll after the receiving sleeve has been pulled off the receiving mandrel.

Durch das Zusammenwirken der Eingriffstrukturen des Aufnahmedorns mit den Formmerkmalen des Innenumfangs der Aufnahmehülse lässt sich auch ohne das Vorsehen beweglicher Spannelemente eine drehfeste Verbindung zwischen der Aufnahmehülse und dem Aufnahmedorn erreichen, so dass die Aufnahmehülse beim Drehen des Aufnahmedorns mitgedreht wird. Durch das Ausbilden des Aufnahmedorns mit den Eingriffstrukturen als starrer Körper wird die Vorrichtung besonders stabil und kann ohne Weiteres auch beim Aufwickeln von hochelastischen Folien auftretenden hohen Kompressionskräften standhalten. Mit den am Aufnahmedorn starr ausgebildeten Eingriffstrukturen ist ohne weitere Maßnahmen durch den Bediener auf einfach Art und Weise gewährleistet, dass die aufgesteckte Aufnahmehülse mitdreht.The interaction of the engagement structures of the receiving mandrel with the shape features of the inner circumference of the receiving sleeve allows a non-rotatable connection between the receiving sleeve and the receiving mandrel even without the provision of movable clamping elements reach, so that the receiving sleeve is rotated when turning the arbor. By configuring the holding mandrel with the engagement structures as a rigid body, the device becomes particularly stable and can easily withstand the high compression forces that occur when highly elastic foils are wound up. With the rigid engagement structures on the accommodating mandrel, it is ensured in a simple manner without further measures by the operator that the accommodating sleeve that is attached rotates as well.

Vorzugsweise sind benachbarte Segmente der Aufnahmehülse im aufgesteckten Zustand der Aufnahmehülse um Schwenkachsen miteinander verbunden, die parallel zu der Drehachse des Aufnahmedorns verlaufen. Dies ermöglicht, nach Abziehen der Aufnahmehülse von dem Aufnahmedorn durch Verschwenken von Segmenten der Aufnahmehülse in Richtung auf ein Inneres der Aufnahmehülse hin die Aufnahmehülse in eine instabile Konfiguration zu bringen, in der sie zusammengefaltet und aus dem Inneren der aufgewickelten Rolle entnommen werden kann.When the receiving sleeve is in the attached state, adjacent segments of the receiving sleeve are preferably connected to one another about pivot axes which run parallel to the axis of rotation of the receiving mandrel. This makes it possible to bring the receiving sleeve into an unstable configuration after removing the receiving sleeve from the receiving mandrel by pivoting segments of the receiving sleeve towards an interior of the receiving sleeve, in which it can be folded up and removed from the inside of the wound roll.

Um eine besonders gute Kraftübertragung zwischen dem Aufnahmedorn und der Aufnahmehülse zu erreichen, verlaufen die Eingriffstrukturen des Aufnahmedorns parallel zu der Drehachse des Aufnahmedorns.In order to achieve particularly good force transmission between the arbor and the accommodating sleeve, the engagement structures of the arbor run parallel to the axis of rotation of the arbor.

Vorzugsweise sind die Eingriffstrukturen entlang eines Umfangs des Aufnahmedorns symmetrisch verteilt. Hierdurch wird eine gleichmäßige Kraftübertragung zwischen Aufnahmehülse und Aufnahmedorn erreicht. Zudem wird es möglich, die Aufnahmehülse in verschiedenen Drehorientierungen auf den Aufnahmedorn aufzuschieben.Preferably, the engagement structures are symmetrically distributed along a circumference of the arbor. This achieves a uniform transmission of force between the accommodating sleeve and arbor. In addition, it is possible to slide the receiving sleeve onto the receiving mandrel in different rotational orientations.

Eine besonders gute und gleichmäßig verteilte Kraftübertragung zwischen Aufnahmehülse und Aufnahmedorn wird erreicht, wenn entlang des Umfangs des Aufnahmedorns zumindest vier Eingriffstrukturen vorgesehen sind.A particularly good and evenly distributed transmission of force between the accommodating sleeve and the accommodating mandrel is achieved if at least four engagement structures are provided along the circumference of the accommodating mandrel.

Vorzugsweise entspricht die Anzahl der Eingriffstrukturen der Anzahl der Segmente der Aufnahmehülse. So können sich die Segmente der Aufnahmehülse durch Verschwenken gegenüber benachbarten Segmenten besonders gut an die Form des Aufnahmedorns anpassen.The number of engagement structures preferably corresponds to the number of segments of the receiving sleeve. The segments of the receiving sleeve can thus be adapted particularly well to the shape of the receiving mandrel by pivoting relative to adjacent segments.

Die Eingriffstrukturen sind als Vorsprünge und/oder als Rippen des Aufnahmedorns ausgebildet. Solche Strukturen sind einfach herstellbar und zum Zusammenwirken mit Formmerkmalen des Innenumfangs der Aufnahmehülse gut geeignet.The engagement structures are designed as projections and/or as ribs of the receiving mandrel. Structures of this type are easy to produce and are well suited for interacting with shape features of the inner circumference of the receiving sleeve.

Die Eingriffstrukturen des Aufnahmedorns und die Formmerkmale des Innenumfangs der Aufnahmehülse können zueinander korrespondierende Formen aufweisen. Insbesondere können die Eingriffstrukturen und die Formmerkmale zueinander komplementäre Formen aufweisen. Hierdurch lässt sich eine gute Kraftübertragung erreichen. Es kann jedoch im aufgesteckten Zustand der Aufnahmehülse durchaus Spiel zwischen den Eingriffstrukturen des Aufnahmedorns und den Formmerkmalen des Innenumfangs der Aufnahmehülse vorhanden sein, um das Aufstecken und Entfernen der Aufnahmehülse zu erleichtern.The engagement structures of the arbor and the shape features of the inner circumference of the accommodating sleeve can have mutually corresponding shapes. In particular, can the engagement structures and the shape features have mutually complementary shapes. This allows a good power transmission to be achieved. However, when the receiving sleeve is in the fitted state, there may well be play between the engagement structures of the receiving mandrel and the shape features of the inner circumference of the receiving sleeve in order to facilitate the fitting and removal of the receiving sleeve.

Gemäß einer einfachen Ausführungsform können die Formmerkmale des Innenumfangs der Aufnahmehülse, mit der die Eingriffstrukturen des Aufnahmedorns zusammenwirken, durch die gegenseitige Anordnung der Segmente der Aufnahmehülse definiert sein. Beispielsweise können aneinander angrenzende Segmente der Aufnahmehülse im aufgesteckten Zustand der Aufnahmehülse unter einem bestimmten Winkel zueinander stehen. Dieser Winkel kann ein Formmerkmal des Innenumfangs der Aufnahmehülse definieren, in welches eine Eingriffstruktur des Aufnahmedorns eingreift. Alternativ oder zusätzlich können die Eingriffstrukturen des Aufnahmedorns auch durch die Form der einzelnen Segmente der Aufnahmehülse definiert sein. Beispielsweise können die Segmente der Aufnahmehülse an ihrer in ein Inneres der Aufnahmehülse gerichteten Seite ein bestimmtes Oberflächenprofil aufweisen, in welches die Eingriffstrukturen eingreifen können.According to a simple embodiment, the shape features of the inner circumference of the receiving sleeve, with which the engagement structures of the receiving mandrel interact, can be defined by the mutual arrangement of the segments of the receiving sleeve. For example, adjacent segments of the receiving sleeve can be at a specific angle to one another when the receiving sleeve is in the attached state. This angle may define a feature of the inner periphery of the receiving sleeve which is engaged by an engagement structure of the receiving mandrel. Alternatively or additionally, the engagement structures of the receiving mandrel can also be defined by the shape of the individual segments of the receiving sleeve. For example, the segments of the receiving sleeve can have a specific surface profile on their side directed towards an interior of the receiving sleeve, into which the engagement structures can engage.

Vorzugsweise ist eine Sicherung vorgesehen, die dazu konfiguriert ist, eine axiale Position der Aufnahmehülse auf dem Aufnahmedorn zu sichern. Hierdurch kann ein Lösen der Aufnahmehülse von dem Aufnahmedorn beim Drehen des Aufnahmedorns verhindert werden.Preferably, a retainer is provided that is configured to secure an axial position of the locating sleeve on the arbor. This can prevent the receiving sleeve from becoming detached from the receiving mandrel when the receiving mandrel is rotated.

Bei der Sicherung kann es sich beispielsweise um ein auf dem Aufnahmedorn vorgesehenes elastisches Element handeln. Ein solches elastisches Element könnte beispielsweise ein O-Ring, ein Silikonring oder ein Federring sein. Das elastische Element könnte im aufgesteckten Zustand der Aufnahmehülse zwischen einem Außenumfang des Aufnahmedorns und dem Innenumfang der Aufnahmehülse vorliegen. Das elastische Element könnte einer axialen Bewegung der Aufnahmehülse auf dem Aufnahmedorn eine gewisse Haltekraft entgegensetzen. Die Haltekraft ist vorzugsweise so gewählt, dass sich die Aufnahmehülse im Betrieb nicht von selbst löst, ein Entfernen der Aufnahmehülse (insbesondere mit der aufgewickelten Folie darauf) durch einen Bediener aber noch möglich ist. Alternativ oder zusätzlich könnte die Sicherung auch ein Keilsystem umfassen. Das Keilsystem könnte beispielsweise einen oder mehrere Keile umfassen, die zumindest teilweise zwischen den Aufnahmedorn und die darauf aufgesteckte Aufnahmehülse geschoben werden und somit die Aufnahmehülse entlang einer axialen Richtung sichern.The fuse can be, for example, an elastic element provided on the receiving mandrel. Such an elastic element could be, for example, an O-ring, a silicone ring or a spring washer. When the receiving sleeve is in the attached state, the elastic element could be present between an outer circumference of the receiving mandrel and the inner circumference of the receiving sleeve. The elastic element could oppose an axial movement of the receiving sleeve on the receiving mandrel with a certain holding force. The holding force is preferably selected in such a way that the receiving sleeve does not come loose by itself during operation, but it is still possible for an operator to remove the receiving sleeve (in particular with the film wound up on it). As an alternative or in addition, the safeguard could also include a wedge system. The wedge system could, for example, comprise one or more wedges which are pushed at least partially between the arbor and the accommodating sleeve fitted thereon and thus secure the accommodating sleeve in an axial direction.

Die Erfindung umfasst auch ein Verfahren zum Aufwickeln einer Folie an einer Verpackungsmaschine. Die erfindungsgemäße Vorrichtung ist zum Durchführen des Verfahrens geeignet, ausgelegt und konfiguriert. In Bezug auf die Vorrichtung beschriebene Merkmale lassen sich auf das Verfahren übertragen und umgekehrt.The invention also includes a method for winding a film on a packaging machine. The device according to the invention is suitable, designed and configured for carrying out the method. Features described in relation to the device can be transferred to the method and vice versa.

Ein erfindungsgemäßes Verfahren zum Aufwickeln einer Folie an einer Verpackungsmaschine umfasst das Aufstecken einer Aufnahmehülse auf einen als starrer Körper mit Eingriffstrukturen ausgebildeten Aufnahmedorn. Die Aufnahmehülse ist von entlang eines Umfangs der Aufnahmehülse nebeneinander angeordneten Segmenten gebildet, wobei benachbarte Segmente schwenkbar miteinander verbunden sind. Die Eingriffstrukturen sind als Vorsprünge und/oder als Rippen ausgebildet. Der Aufnahmedorn wird zu einer Drehung um eine Drehachse angetrieben, zu welcher die Eingriffstrukturen parallel verlaufen. Hierbei wirken die Eingriffstrukturen des Aufnahmedorns mit Formmerkmalen eines Innenumfangs der aufgesteckten Aufnahmehülse derart zusammen, dass die Drehung des Aufnahmedorns um die Drehachse ein Mitdrehen der Aufnahmehülse bewirkt, wobei die Folie auf die Aufnahmehülse aufgewickelt wird.A method according to the invention for winding up a film on a packaging machine comprises slipping a receiving sleeve onto a receiving mandrel designed as a rigid body with engagement structures. The receiving sleeve is formed by segments arranged next to one another along a circumference of the receiving sleeve, with adjacent segments being pivotably connected to one another. The engagement structures are designed as projections and/or as ribs. The arbor is driven to rotate about an axis of rotation to which the engagement structures are parallel. The engagement structures of the holding mandrel interact with shape features of an inner circumference of the mounted holding sleeve in such a way that the rotation of the holding mandrel about the axis of rotation causes the holding mandrel to rotate as well, with the film being wound onto the holding mandrel.

Vorzugsweise umfasst das Verfahren auch das Sichern einer axialen Position der Aufnahmehülse auf dem Aufnahmedorn mit einer Sicherung. Die Sicherung kann beispielsweise ein auf dem Aufnahmering vorgesehenes elastisches Element, insbesondere einen O-Ring, einen Silikonring oder einen Federring, umfassen. Alternativ oder zusätzlich kann die Sicherung auch ein Keilsystem umfassen.Preferably, the method also includes securing an axial position of the locating sleeve on the arbor with a retainer. The fuse can, for example, comprise an elastic element provided on the receiving ring, in particular an O-ring, a silicone ring or a spring ring. As an alternative or in addition, the safeguard can also include a wedge system.

Die Aufnahmehülse mit der aufgewickelten Folie kann von dem Aufnahmedorn abgezogen werden. Durch Verändern der gegenseitigen Lage der Segmente der Aufnahmehülse durch Verschwenken benachbarter Segmente kann dann eine Konfiguration der Aufnahmehülse derart verändert werden, dass diese aus der gewickelten Folienrolle entnehmbar ist.The receiving sleeve with the wound film can be pulled off the receiving mandrel. By changing the mutual position of the segments of the receiving sleeve by pivoting adjacent segments, a configuration of the receiving sleeve can then be changed in such a way that it can be removed from the wound film roll.

Weitere Merkmale des Verfahrens ergeben sich aus der obigen Beschreibung der Vorrichtung.Further features of the method emerge from the above description of the device.

Im Folgenden soll die Erfindung anhand von Ausführungsbeispielen unter Bezugnahme auf die Figuren weiter erläutert werden. Dabei zeigt

Figur 1
eine schematische Perspektivansicht einer Verpackungsmaschine mit einer Vorrichtung zum Aufwickeln einer Folie gemäß einer Ausführungsform;
Figur 2
eine schematische Perspektivansicht einer Vorrichtung zum Aufwickeln einer Folie mit aufgesteckter Aufnahmehülse gemäß einer Ausführungsform;
Figur 3
eine schematische Perspektivdarstellung einer Vorrichtung zum Aufwickeln einer Folie mit abgenommener Aufnahmehülse gemäß einer Ausführungsform;
Figur 4
eine schematische Darstellung einer Vorrichtung zum Aufwickeln einer Folie mit auf den Aufnahmedorn aufgesteckter Aufnahmehülse in Blickrichtung entlang der Drehachse des Aufnahmedorns gemäß einer Ausführungsform;
Figur 5
eine schematische Darstellung einer Vorrichtung zum Aufwickeln einer Folie mit auf den Aufnahmedorn aufgesteckter Aufnahmehülse und gewickelter Folie in Blickrichtung entlang der Drehachse des Aufnahmedorns gemäß einer anderen Ausführungsform; und
Figur 6
eine schematische Darstellung einer Aufnahmehülse mit aufgewickelter Folie nach Abziehen von dem Aufnahmedorn zur Erläuterung des Entfernens der Aufnahmehülse gemäß der in Fig. 5 dargestellten Ausführungsform.
The invention is to be explained further below using exemplary embodiments with reference to the figures. while showing
figure 1
a schematic perspective view of a packaging machine with a device for winding a film according to an embodiment;
figure 2
a schematic perspective view of a device for winding up a film with an attached receiving sleeve according to one embodiment;
figure 3
a schematic perspective view of a device for winding up a film with a removed receiving sleeve according to one embodiment;
figure 4
a schematic representation of a device for winding up a film with the receiving sleeve attached to the receiving mandrel viewed in the direction along the axis of rotation of the receiving mandrel according to one embodiment;
figure 5
a schematic representation of a device for winding up a film with the receiving sleeve attached to the receiving mandrel and the wound film viewed along the axis of rotation of the receiving mandrel according to another embodiment; and
figure 6
a schematic representation of a receiving sleeve with wound film after being pulled off the receiving mandrel to explain the removal of the receiving sleeve according to in figure 5 illustrated embodiment.

Fig. 1 zeigt ein Beispiel für eine Verpackungsmaschine 1 mit einer erfindungsgemäßen Vorrichtung 3 zum Aufwickeln einer Folie 5. In der dargestellten Variante ist die Verpackungsmaschine 1 als Schalenverschließmaschine dargestellt. Diese weist ein Zuführband 7 auf, mit dem befüllte Schalen zu einer Verschließstation 9 befördert werden. Die Schalen werden mit einer Greifereinrichtung 11 in die Verschließstation 9 umgesetzt und dort mit einer von oben zugeführten Deckfolie 5 (Folie) durch Ansiegeln der Deckfolie 5 verschlossen. Die fertiggestellten Verpackungen werden über das Greifersystem 11 aus der Verschließstation 9 auf ein Abführband 15 umgesetzt. 1 shows an example of a packaging machine 1 with a device 3 according to the invention for winding up a film 5. In the variant shown, the packaging machine 1 is shown as a tray sealing machine. This has a feed belt 7 with which filled shells are conveyed to a closing station 9 . The shells are transferred to the closing station 9 with a gripper device 11 and closed there with a cover film 5 (foil) fed from above by sealing the cover film 5 on. The finished packs are transferred from the closing station 9 to a discharge belt 15 via the gripper system 11 .

Nach dem Ansiegeln der Deckfolie 5 werden den Verpackungen bzw. Verpackungsverbünden entsprechende Bereiche der Deckfolie 5 in der Verschließstation 9 aus der Bahn der Deckfolie 5 ausgeschnitten. Es verbleibt ein Folienrestgitter der Deckfolie 5, welches mit der Vorrichtung 3 zum Aufwickeln der Folie 5 aufgewickelt wird.After the cover film 5 has been sealed on, areas of the cover film 5 corresponding to the packages or composite packaging are cut out of the web of cover film 5 in the sealing station 9 . A residual film lattice of the cover film 5 remains, which is wound up with the device 3 for winding up the film 5 .

Fig. 2 zeigt eine schematische Ansicht der Vorrichtung 3 zum Aufwickeln der Folie 5. Die Vorrichtung 3 umfasst einen Aufnahmedorn 17, der mittels einer Antriebseinrichtung 19 um eine Drehachse D drehbar angeordnet ist. Auf den Aufnahmedorn 17 ist eine Aufnahmehülse 21 aufgesteckt. Die Aufnahmehülse 21 dreht sich mit dem Aufnahmedorn 17 mit, wobei die Folie 5 auf die Aufnahmehülse 21 aufgewickelt wird. 2 shows a schematic view of the device 3 for winding up the film 5. The device 3 comprises a receiving mandrel 17, which is arranged to be rotatable about an axis of rotation D by means of a drive device 19. A receiving sleeve 21 is attached to the receiving mandrel 17 . The receiving sleeve 21 rotates with the receiving mandrel 17, the film 5 being wound onto the receiving sleeve 21.

Die Aufnahmehülse 21 umfasst eine Vielzahl von Segmenten 23, die sich parallel zu der Drehachse D erstrecken. Benachbarte Segmente 23 sind schwenkbar miteinander verbunden, wobei die entsprechenden Schwenkachsen S ebenfalls parallel zur Drehachse D des Aufnahmedorns 17 verlaufen.The receiving sleeve 21 comprises a multiplicity of segments 23 which extend parallel to the axis of rotation D. Adjacent segments 23 are pivotally connected to one another, with the corresponding pivot axes S also running parallel to the axis of rotation D of the receiving mandrel 17 .

Fig. 3 zeigt eine Darstellung der Vorrichtung 3 zum Aufwickeln der Folie 5, bei der die Aufnahmehülse 21 von dem Aufnahmedorn 17 abgezogen wurde. Der Aufnahmedorn 17 ist als starrer Körper ausgebildet, der Eingriffstrukturen 25 aufweist. In der dargestellten Ausführungsform umfasst der im Wesentlichen zylinderförmige Aufnahmedorn 17 sich parallel zu seiner Drehachse D erstreckende Rillen, zwischen denen rippenförmige Erhebungen definiert sind, die die Eingriffstrukturen 25 bilden. Die Aufnahmehülse 21 kann parallel zur Drehachse D des Aufnahmedorns 17 auf den Aufnahmedorn 17 aufgeschoben werden. In der gezeigten Ausführungsform ist an dem Aufnahmedorn 17 ein Anschlag 27 (beispielsweise in Form einer Madenschraube) vorgesehen, der eine mögliche Endposition der Aufnahmehülse 21 beim Aufschieben auf den Aufnahmedorn 17 definiert. 3 shows a representation of the device 3 for winding up the film 5, in which the receiving sleeve 21 has been pulled off the receiving mandrel 17. The receiving mandrel 17 is designed as a rigid body which has engagement structures 25 . In the illustrated embodiment, the substantially cylindrical receiving mandrel 17 comprises grooves extending parallel to its axis of rotation D, between which rib-shaped elevations are defined, which form the engagement structures 25 . The receiving sleeve 21 can be pushed onto the receiving mandrel 17 parallel to the axis of rotation D of the receiving mandrel 17 . In the embodiment shown, a stop 27 (for example in the form of a grub screw) is provided on the receiving mandrel 17 and defines a possible end position of the receiving sleeve 21 when it is pushed onto the receiving mandrel 17 .

Um die Aufnahmehülse 21 nach dem Aufstecken auf dem Aufnahmedorn 17 zu halten, kann eine Sicherung vorgesehen sein. In der gezeigten Ausführungsform umfasst die Sicherung ein elastisches Element 29, das ringförmig ausgebildet ist und sich um den Außenumfang des Aufnahmedorns 17 herum erstreckt. Das elastische Element 29 kann insbesondere in einer Nut des Aufnahmedorns 17 aufgenommen sein. Bei aufgesteckter Aufnahmehülse 21 liegt das elastische Element 29 zwischen einem Außenumfang des Aufnahmedorns 17 und einem Innenumfang der Aufnahmehülse 21 und wirkt einem axialen Herunterrutschen der Aufnahmehülse 21 von dem Aufnahmedorn 17 entgegen. Alternativ oder zusätzlich kann die Sicherung auch ein Keilsystem 31 umfassen, das einen oder mehrere Keile aufweisen kann, die nach dem Aufschieben der Aufnahmehülse 21 auf den Aufnahmedorn 17 zumindest teilweise zwischen den Aufnahmedorn 17 und die Aufnahmehülse 21 eingeschoben werden können, um die axiale Lage der Aufnahmehülse 21 an dem Aufnahmedorn 17 zu sichern.In order to hold the receiving sleeve 21 on the receiving mandrel 17 after it has been pushed on, a safety device can be provided. In the embodiment shown, the fuse comprises an elastic element 29 which is ring-shaped and extends around the outer circumference of the arbor 17 . The elastic element 29 can in particular be accommodated in a groove of the receiving mandrel 17 . When the receiving sleeve 21 is fitted, the elastic element 29 lies between an outer circumference of the receiving mandrel 17 and an inner circumference of the receiving sleeve 21 and counteracts an axial sliding down of the receiving sleeve 21 from the receiving mandrel 17 . Alternatively or additionally, the securing device can also comprise a wedge system 31, which can have one or more wedges which, after the receiving sleeve 21 has been pushed onto the receiving mandrel 17, can be pushed at least partially between the receiving mandrel 17 and the receiving sleeve 21 in order to adjust the axial position of the To secure receiving sleeve 21 on the receiving mandrel 17.

Nachdem durch Drehen des Aufnahmedorns 17 und entsprechendes Mitdrehen der darauf vorgesehenen Aufnahmehülse 21 die Folie 5 aufgewickelt wurde, kann die entstandene Folienrolle zusammen mit der Aufnahmehülse 21 von dem Aufnahmedorn 17 abgezogen werden. Hierzu kann gegebenenfalls zunächst das Keilsystem 31 entfernt werden. Anschließend kann die Aufnahmehülse 21 mit der Folienrolle, gegebenenfalls unter Überwindung der Rückhaltekraft des elastischen Elements 29, abgezogen werden.After the film 5 has been wound up by rotating the receiving mandrel 17 and correspondingly rotating the receiving sleeve 21 provided thereon, the resulting film roll can be pulled off the receiving mandrel 17 together with the receiving sleeve 21 . For this purpose, if necessary, the wedge system 31 can first be removed. The receiving sleeve 21 can then be pulled off with the roll of film, if necessary by overcoming the retaining force of the elastic element 29 .

Fig. 4 zeigt in einer schematischen Ansicht mit Blickrichtung entlang der Drehachse D des Aufnahmedorns 17 den Aufnahmedorn 17 und die aufgesteckte Aufnahmehülse 21. In der dargestellten Ausführungsform sind die Segmente 23 der Aufnahmehülse 21 von Gliederelementen gebildet, die jeweils zwei sich parallel zu der Drehachse D erstreckende Aufnahmeöffnungen 33 umfassen. Benachbarte Segmente 23 sind derart entlang eines Umfangs der Aufnahmehülse 21 ineinander gesteckt, dass entsprechende Öffnungen 33 benachbarter Segmente 23 überlappen und eine gemeinsame Aufnahmeöffnung für Bolzen oder Stangen 34 (nur zwei dargestellt) bilden, welche benachbarte Segmente 23 schwenkbar miteinander verbinden. In der in Fig. 4 gezeigten Ausführungsform umfasst die Aufnahmehülse 21 zwanzig Segmente 23. Aufgrund der relativ hohen Anzahl der Segmente 23 ist die Form der Aufnahmehülse 21 relativ gut an die Form des Aufnahmedorns 17, insbesondere eine im Wesentlichen zylindrische Form, anpassbar. Es wäre aber auch eine andere Anzahl von Segmenten 23 denkbar. 4 shows the receiving mandrel 17 and the attached receiving sleeve 21 in a schematic view looking along the axis of rotation D of the receiving mandrel 17. In the embodiment shown, the segments 23 of the receiving sleeve 21 are formed by link elements, each of which has two receiving openings 33 extending parallel to the axis of rotation D include. Adjacent segments 23 are nested along a circumference of receiving sleeve 21 such that corresponding openings 33 of adjacent segments 23 overlap and form a common receiving opening for bolts or rods 34 (only two shown) which pivotally connect adjacent segments 23 together. in the in 4 In the embodiment shown, the receiving sleeve 21 comprises twenty segments 23. Due to the relatively high number of segments 23, the shape of the receiving sleeve 21 can be adapted relatively well to the shape of the receiving mandrel 17, in particular a substantially cylindrical shape. However, a different number of segments 23 would also be conceivable.

In der in Fig. 4 dargestellten Ausführungsform sind die Segmente 23 auf ihrer nach innen gerichteten Seite so geformt, dass sie jeweils nach innen weisende Wölbungen 35 und gegenüber den Wölbungen 35 weniger weit nach innen ragende Bereiche 37 aufweisen. Aufgrund dieser Form der einzelnen Segmente 23 ergibt sich für die Aufnahmehülse 21 insgesamt ein ungleichmäßiger Innenumfang. Durch die Form der Segmente 23 sind also Formmerkmale 39 des Innenumfangs der Aufnahmehülse 21 gebildet. Die Eingriffstrukturen 25 des Aufnahmedorns 17 sind so ausgebildet, dass sie mit den Formmerkmalen 39 des Innenumfangs der Aufnahmehülse 21 zusammenwirken, so dass eine Drehung des Aufnahmedorns 17 um die Drehachse D ein Mitdrehen der Aufnahmehülse 21 bewirkt. In der dargestellten Ausführungsform sind die Eingriffstrukturen 25 des Aufnahmedorns 17 hierzu in Form von Rippen ausgebildet, die sich parallel zu der Drehachse D des Aufnahmedorns 17 erstrecken. Obwohl dies in Fig. 4 nicht maßstabsgetreu dargestellt ist, ist erkennbar, dass zwischen den Formmerkmalen 39 des Innenumfangs der Aufnahmehülse 21 und den Eingriffstrukturen 25 des Aufnahmedorns 17 zumindest vor dem Aufrollen der Folie 5 ein gewisses Spiel vorliegt. So wird gewährleistet, dass die Aufnahmehülse 21 auf den Aufnahmedorn 17 aufschiebbar ist.in the in 4 In the illustrated embodiment, the segments 23 are shaped on their inward-facing side in such a way that they each have inward-pointing bulges 35 and, compared to the bulges 35 , regions 37 that protrude less far inwards. This shape of the individual segments 23 results in an overall uneven inner circumference for the receiving sleeve 21 . Shape features 39 of the inner circumference of receiving sleeve 21 are thus formed by the shape of segments 23 . The engagement structures 25 of the receiving mandrel 17 are designed in such a way that they interact with the shaped features 39 of the inner circumference of the receiving sleeve 21 so that a rotation of the receiving mandrel 17 about the axis of rotation D causes the receiving sleeve 21 to rotate as well. In the embodiment shown, the engagement structures 25 of the holding mandrel 17 are designed in the form of ribs for this purpose, which extend parallel to the axis of rotation D of the holding mandrel 17 . Although this in 4 is not shown to scale, it can be seen that there is a certain amount of play between the shaped features 39 of the inner circumference of the receiving sleeve 21 and the engagement structures 25 of the receiving mandrel 17 at least before the foil 5 is rolled up. This ensures that the receiving sleeve 21 can be pushed onto the receiving mandrel 17 .

Vorzugsweise sind auch die Bolzen oder Stangen 34 in den Öffnungen 33 der Segmente 23 der Aufnahmehülse 21 mit Spiel vorgesehen. Wenn nun die Folie 5 durch Drehung des Aufnahmedorns 17 aufgewickelt wird, wird ein radial nach innen wirkender Druck von außen auf die Aufnahmehülse 21 ausgeübt, so dass sich diese aufgrund des Spiels der Bolzen oder Stangen 34 in den Öffnungen 33 noch besser an den Aufnahmedorn 17 und dessen Eingriffstrukturen 25 anlegt, so dass die Kraftübertragung zwischen dem Aufnahmedorn 17 und der Aufnahmehülse 21 verbessert wird. Durch den von außen wirkenden Druck stabilisieren sich die Segmente 23 gegenseitig, so dass die Gesamtform der Aufnahmehülse 21 stabilisiert wird. Es wird so sichergestellt, dass die Aufnahmehülse 21 auch nach Aufwickeln der Folie 5 immer noch in axialer Richtung von dem Aufnahmedorn 17 abziehbar ist.The bolts or rods 34 are preferably also provided in the openings 33 of the segments 23 of the receiving sleeve 21 with play. If the film 5 is now wound up by rotating the take-up mandrel 17, a radially inward-acting pressure is exerted from the outside on the take-up sleeve 21, so that it fits even better to the take-up mandrel 17 due to the play of the bolts or rods 34 in the openings 33 and whose engagement structures 25 applies, so that the power transmission between the arbor 17 and of the receiving sleeve 21 is improved. The segments 23 mutually stabilize one another as a result of the external pressure, so that the overall shape of the receiving sleeve 21 is stabilized. This ensures that the receiving sleeve 21 can still be pulled off the receiving mandrel 17 in the axial direction even after the film 5 has been wound up.

Fig. 5 zeigt in zu der Ansicht aus Fig. 4 analoger Perspektive eine beispielhafte alternative Ausführungsform des Aufnahmedorns 17 und der Aufnahmehülse 21. In der gezeigten Variante sind die Segmente 23 der Aufnahmehülse 21 durch sich parallel zu der Drehachse D des Aufnahmedorns 17 erstreckende flache Platten gebildet. Benachbarte Segmente 23 weisen wiederum miteinander überlappende Öffnungen 33 zur Aufnahme von Bolzen oder Stangen 34 auf, so dass die benachbarten Segmente 23 schwenkbar miteinander verbunden sind. Ein Innenumfang der Aufnahmehülse 21 ergibt sich in dieser Ausführungsform in der Form eines Polygons. Die Ecken des Polygons bilden Formmerkmale 39 des Innenumfangs der Aufnahmehülse 21 für die Kraftübertragung zwischen dem Aufnahmedorn 17 und der Aufnahmehülse 21. Der Aufnahmedorn 17 ist in dieser Ausführungsform mit einem korrespondierenden polygonförmigen Umfang ausgestattet. Die Ecken dieses polygonförmigen Umfangs bilden Eingriffstrukturen 25 zum Eingriff in die Formmerkmale 39 der Aufnahmehülse 21. Somit entsteht auch hier ein Zusammenwirken zwischen Aufnahmedorn 17 und Aufnahmehülse 21, das ein Mitdrehen der Aufnahmehülse 21 mit dem Aufnahmedorn 17 gewährleistet. figure 5 shows in to the view 4 An analogous perspective shows an exemplary alternative embodiment of the receiving mandrel 17 and the receiving sleeve 21. In the variant shown, the segments 23 of the receiving sleeve 21 are formed by flat plates extending parallel to the axis of rotation D of the receiving mandrel 17. Adjacent segments 23 in turn have overlapping openings 33 for receiving bolts or rods 34 so that the adjacent segments 23 are pivotally connected to each other. In this embodiment, an inner circumference of the receiving sleeve 21 is in the form of a polygon. The corners of the polygon form features 39 of the inner circumference of the receiving sleeve 21 for force transmission between the receiving mandrel 17 and the receiving sleeve 21. In this embodiment, the receiving mandrel 17 is equipped with a corresponding polygon-shaped circumference. The corners of this polygonal circumference form engagement structures 25 for engaging in the shaped features 39 of the receiving sleeve 21. Thus, here too there is interaction between the receiving mandrel 17 and the receiving sleeve 21, which ensures that the receiving sleeve 21 rotates with the receiving mandrel 17.

Es sind noch beliebige weitere Modifikationen der Form und Ausgestaltung der Formmerkmale 39 des Innenumfangs der Aufnahmehülse 21 und der Eingriffstrukturen 25 des Aufnahmedorns 17 denkbar.Any further modifications of the shape and design of the shape features 39 of the inner circumference of the receiving sleeve 21 and the engagement structures 25 of the receiving mandrel 17 are also conceivable.

Fig. 6 zeigt die Aufnahmehülse 21 der Ausführungsform aus Fig. 5 nach Aufrollen der Folie 5 und Abziehen der Aufnahmehülse 21 mit der Folienrolle von dem Aufnahmedorn 17. Aufgrund der Verschwenkbarkeit benachbarter Segmente 23 der Aufnahmehülse 21 lässt sich die Aufnahmehülse 21 im abgezogenen Zustand in eine instabile Konfiguration überführen, in der sie aus dem Inneren der Folienrolle entnehmbar ist. Wie in Fig. 6 gezeigt, werden hierzu Segmente 23 der Aufnahmehülse 21 auf eine Mittelachse der Aufnahmehülse 21 hin nach innen verschwenkt. Eine Entnahme der Aufnahmehülse 21 ist nach dem gleichen Prinzip auch für die Ausführungsform der Fig. 2 bis 4 möglich. 6 12 shows the receiving sleeve 21 of the embodiment figure 5 after the film 5 has been rolled up and the receiving sleeve 21 with the film roll has been pulled off the receiving mandrel 17. Due to the pivotability of adjacent segments 23 of the receiving sleeve 21, the receiving sleeve 21 can be converted into an unstable configuration in the pulled-off state, in which it can be removed from the interior of the film roll is. As in 6 shown, for this purpose segments 23 of the receiving sleeve 21 are pivoted inwards on a central axis of the receiving sleeve 21 . A removal of the receiving sleeve 21 is based on the same principle for the embodiment of Figures 2 to 4 possible.

Claims (14)

  1. Device (3) for winding up a film (5) at a packaging machine (1), comprising:
    a reception mandrel (17) drivable for rotation about a rotation axis (D); and
    a reception sleeve (21) for the film (5) for being pushed onto the reception mandrel (17), wherein the reception sleeve (21) is formed by segments (23) arranged next to each other along a circumference of the reception sleeve (21), wherein neighboring segments (23) are pivotably connected to each other,
    wherein the reception mandrel (17) is formed as rigid body having engagement structures (25) that are configured to cooperate with shape features (39) of an inner circumference of the reception sleeve (21), when the reception sleeve (21) has been pushed onto the reception mandrel (17), so that a rotation of the reception mandrel (17) about the rotation axis (D) causes the reception sleeve (21) to co-rotate,
    wherein the engagement structures (25) extend in parallel with the rotation axis (D), and
    wherein the engagement structures (25) are provided as projections and/or as ribs.
  2. Device according to claim 1, wherein in a pushed-on state of the reception sleeve (21), neighboring segments (23) of the reception sleeve (21) are connected pivotably about pivot axes (S) that extend in parallel with the rotation axis (D).
  3. Device according to any one of the preceding claims, wherein the engagement structures (25) are symmetrically distributed along a circumference of the reception mandrel (17).
  4. Device according to any one of the preceding claims, wherein at least four engagement structures (25) are provided along the circumference of the reception mandrel (17).
  5. Device according to any one of the preceding claims, wherein the number of engagement structures (25) corresponds to the number of segments (23) of the reception sleeve (21).
  6. Device according to any one of the preceding claims, wherein the engagement structures (25) of the reception mandrel (17) and the shape features (39) of the inner circumference of the reception sleeve (21) have shapes that correspond to each other.
  7. Device according to any one of the preceding claims, wherein the shape features (39) of the inner circumference of the reception sleeve (21), with which the engagement structures (25) of the reception mandrel (17) cooperate, are defined by the mutual arrangement of the segments (23) of the reception sleeve (21).
  8. Device according to any one of the preceding claims, wherein the shape features (39) of the inner circumference of the reception sleeve (21), with which the engagement structures (25) of the reception mandrel (17) cooperate, are defined by the shape of the individual segments (23) of the reception sleeve (21).
  9. Device according to any one of the preceding claims, further comprising a retainer configured to secure an axial position of the reception sleeve (21) on the reception mandrel (17).
  10. Device according to claim 9, wherein the retainer comprises an elastic element (29), in particular an O-ring, a silicone ring or a spring ring, provided on the reception mandrel (17) and/or a wedge system (31).
  11. Method for winding up a film (5) at a packaging machine (1), comprising:
    pushing a reception sleeve (21) formed by segments (23) arranged next to each other along a circumference of the reception sleeve (21), wherein neighboring segments (23) are pivotally connected with each other, onto a reception mandrel (17) formed as a rigid body having engagement structures (25), wherein the engagement structures (25) are provided as projections and/or as ribs; and
    driving the reception mandrel (17) for rotation about a rotation axis (D), wherein the engagement structures (25) extend in parallel with the rotation axis (D), wherein the engagement structures (25) of the reception mandrel (17) cooperate with shape features (39) of an inner circumference of the reception sleeve (21) that has been pushed on the reception mandrel (17), so that the rotation of the reception mandrel (17) about the rotation axis (D) causes the reception sleeve (21) to co-rotate, wherein the film (5) is wound onto the reception sleeve (21).
  12. Method according to claim 11, wherein an axial position of the reception sleeve (21) on the reception mandrel (17) is secured with a retainer.
  13. Method according to claim 12, wherein the retainer comprises an elastic element (29), in particular an O-ring, a silicone ring or a spring ring, provided on the reception mandrel (17) and/or a wedge system (31).
  14. Method according to any one of claims 11 to 13, wherein the reception sleeve (21) together with the wound-up film (5) is pulled from the reception mandrel (17) and a configuration of the reception sleeve (21) is changed by changing the mutual positioning of the segments (23) of the reception sleeve (21) by pivoting neighboring segments (23), such that the reception sleeve (21) can be taken out of the wound-up film roll.
EP20160698.5A 2019-04-30 2020-03-03 Device and method for coiling a film on a packaging machine Active EP3733576B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019206153.2A DE102019206153A1 (en) 2019-04-30 2019-04-30 Device and method for winding a film on a packaging machine

Publications (2)

Publication Number Publication Date
EP3733576A1 EP3733576A1 (en) 2020-11-04
EP3733576B1 true EP3733576B1 (en) 2023-05-03

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ID=69770495

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Application Number Title Priority Date Filing Date
EP20160698.5A Active EP3733576B1 (en) 2019-04-30 2020-03-03 Device and method for coiling a film on a packaging machine

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US (1) US11254533B2 (en)
EP (1) EP3733576B1 (en)
CN (1) CN212315040U (en)
DE (1) DE102019206153A1 (en)
ES (1) ES2949673T3 (en)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1832590A (en) * 1929-02-27 1931-11-17 Foxcase Corp Reel
US2585159A (en) * 1946-06-17 1952-02-12 James C Morley Cable reel
US2973160A (en) * 1959-01-26 1961-02-28 Mercury Engineering Corp Expandable mandrel for web rewinders
US3355121A (en) * 1966-10-13 1967-11-28 Sonoco Products Co Expansible chuck for tubular core
US3396918A (en) * 1967-01-09 1968-08-13 Goodyear Tire & Rubber Expandable adapter
AU778927B2 (en) * 2000-02-24 2004-12-23 Viscount Plastics (Australia) Pty Ltd Collapsible reel assembly
AU780665B2 (en) * 2000-12-07 2005-04-07 Viscount Plastics (Australia) Pty Ltd Locking plate for a collapsible reel assembly
GB0204085D0 (en) * 2002-02-21 2002-04-10 Cg Automation Ltd Collapsible mandrel
US20040113011A1 (en) * 2002-12-17 2004-06-17 Place James S. Reusable collapsible core
US20050145746A1 (en) * 2002-12-17 2005-07-07 Place James S. Reusable collapsible core
US7036766B2 (en) * 2002-12-17 2006-05-02 Maximum Production Solutions, Inc. Reusable collapsible core
TWM330196U (en) * 2007-05-08 2008-04-11 Tsc Auto Id Technology Co Ltd Carbon ribbon for tab printer and paper winding reel
WO2017021807A1 (en) * 2015-08-04 2017-02-09 Nine Ip Limited A fabric roll up core for carrying sheet material
EP3214031A1 (en) * 2016-03-02 2017-09-06 MULTIVAC Sepp Haggenmüller SE & Co. KG Receiving sleeve

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Publication number Publication date
ES2949673T3 (en) 2023-10-02
US11254533B2 (en) 2022-02-22
EP3733576A1 (en) 2020-11-04
DE102019206153A1 (en) 2020-11-05
US20200346884A1 (en) 2020-11-05
CN212315040U (en) 2021-01-08

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