EP0140301A1 - Method and device for enveloping packages or bundles in stretch-foil - Google Patents

Method and device for enveloping packages or bundles in stretch-foil Download PDF

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Publication number
EP0140301A1
EP0140301A1 EP84112608A EP84112608A EP0140301A1 EP 0140301 A1 EP0140301 A1 EP 0140301A1 EP 84112608 A EP84112608 A EP 84112608A EP 84112608 A EP84112608 A EP 84112608A EP 0140301 A1 EP0140301 A1 EP 0140301A1
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EP
European Patent Office
Prior art keywords
film
supply
packages
supply roll
wrapping
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Granted
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EP84112608A
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German (de)
French (fr)
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EP0140301B1 (en
Inventor
Peter Silbernagel
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B HAGEMANN AND Co
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B HAGEMANN AND Co
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Priority to AT84112608T priority Critical patent/ATE28306T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/008—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material by webs revolving around articles moved along the axis of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/58—Applying two or more wrappers, e.g. in succession

Definitions

  • the invention relates to a method for helically wrapping packages or containers in a shrink-wrapping film, in which the film is pulled from at least one supply roll under tension and is guided by means of one (or more) supply roll guide device (s) around a winding cross-section which is larger than the axial package projection, and in which the packages or packages are guided through the web of the supply roll guide device (s) during the wrapping through the winding cross section.
  • Pre-stretched, shrink-wrapping films have found extensive use in packaging technology in recent years. Such films, for example under the trade name PRESTO-STRETCH-GARD, PRESTO-BUNDLE-GARD and PRESTO-STRETCH-GARD IV, have the property that an object covered by them is compressed due to the remaining film tension without the film tearing. This means that the packaging technology with such pre-stretchable, shrink-wrapping films differs considerably from that with heat-shrinking films, which are also used in packaging technology.
  • a method and a device are known (Overwrap-Equipment Co., Fairfield, NJ, USA), in which relatively long packages or containers are sent through a winding station and are encircled by a rotating film supply roll as the process proceeds from which the film is unwound.
  • bridging conveyor belts in the area of winding stations (cf. DE-OS 31 19 657), so that even shorter objects are transported, the bridging conveyor belt and the package / container being wrapped as the process progresses.
  • package is understood to mean a more or less closed, possibly bulky, but not falling apart structure, for example a carpet roll, while under a “bundle” is to be understood to mean a structure which is stacked out of cardboard boxes, objects and the like, which can be pushed down from its base when a slight force is exerted, for example by the wrapping film itself, or move without a base, so that the "bundle” so that it no longer has the original shape to be encased.
  • wrapping containers of the type identified above with the known methods and devices is particularly difficult since, for example, stacked, light cardboard packaging filled with plastic objects tend to wrap with a pre-tensioned stretch film from the container to be pushed out or moved.
  • This object is achieved according to the invention in a method for the spiral-like wrapping of packages or containers in a shrinking film, in which the wrapping is carried out simultaneously by two counter-rotating supply rolls which are arranged one behind the other in the conveying direction of the packages or containers by at least one film width .
  • the tension and the circulation speed of the supply rolls can be varied; however, the method is preferably used in such a way that the two supply rolls run synchronously.
  • the foils lay down wrinkle-free during the transport of the package / container, with a uniform distribution of force on the package / container also being achieved.
  • the two rolls are equipped with films of different widths and / or that the film tension of the two supply rolls is kept at different values.
  • the front roller in the conveying direction can be held under a slight tension, while an increased tension is applied to the subsequent supply roller.
  • the device for performing the method i. H.
  • a roller guide device with two supply rolls which rotate in opposite directions and are offset in the conveying direction by at least one film width.
  • the counter-rotating supply rolls are therefore preferably rotatably attached to the front and back of the rotating frame of a supply roll guide device.
  • a device for wrapping packages 1 is shown in perspective.
  • the device has a wrapping film guide device 2, with which a strip of a wrapping film 3, 3 'can be drawn off from each of two supply rolls 4, 4'.
  • the supply rolls 4, 4 ' are each mounted on a ring 5, 5' with a flying axis.
  • Each of the two rings 5, 5 ' is provided on its outside with a ring gear, with two driving pinions 6, 6' rotating in opposite directions, but driven by the same motor, rotating the two rings 5, 5 'in opposite directions. Viewed in the direction of conveyance, the ring 5 rotates clockwise and the ring 5 'rotates counterclockwise.
  • Two conveyor belts 7 and 8 are arranged in front of and behind the winding station equipped with the two rings 5, 5 '.
  • a bridging conveyor (not shown here) can convey the package or a container through the rings 5, 5 '.
  • the actual winding station is surrounded by a holding frame 10.
  • the guide devices in particular the rings 5, 5 'with the associated drive devices, are held by a supporting wall 11 which extends between the periphery of the rings and which has (not shown) support devices for the rings.
  • the means of rotating the wreaths and transporting the packages or containers are known per se.
  • the film is a so-called stretch film, that is to say a shrinking film, which is pulled off under tension from one of the supply rolls 4, 4 ', the supply rolls rotating in opposite directions during wrapping on a fixed path. Distance from package 1 is kept. The package is transported during the wrapping, so that when wrapping, two wrapping foil layers lying one on top of the other with opposite slopes result.
  • roller guide device here consisting of the two rings 5, 5 ', is equipped with two supply rollers which rotate in opposite directions and synchronously and are offset by at least one film width in the conveying direction.
  • winding axes of the supply rolls are inclined to the axis of rotation of the frame 5 or 5 'by an angle between 2 - 20 o from the parallel orientation, specifically for the roll 4 away from the package and at Roll 4 'to the package.
  • This inclination of the rollers causes the film to lay against the package practically without creases and without the need for additional guide and guide rollers, so that a film tube is formed particularly smoothly.
  • the film pre-tension which depends on the circumstances and the composition of the film material, to be different in the two films, for example the first winding roll 4 'with a slightly lower winding tension and the subsequent roll 4 with a somewhat higher winding tension to wrap.
  • different film widths for example initially narrow (roll 4 '), then wide (Roll 4) can be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Abstract

Process and apparatus for an orbital stretch wrapper to form two superimposed layers of opposite pitch on items or bundles. Shrinkable film is drawn off two separate supply rolls under tension simultaneously in opposing rotational directions. The rolls are placed successively along the length of a conveyor belt separated by at least one width of the film.

Description

Die Erfindung betrifft ein Verfahren zum wendelartigen Einhüllen von Packstücken oder Gebinden in einer nachschrumpfenden Folie, bei dem die Folie unter Zugspannung von wenigstens einer Vorratsrolle abgezogen und mittels einer (oder mehrerer) Vorratsrollen-Führeinrichtung(en) um einen Wickelquerschnitt geführt wird, der größer ist als die axiale Packstück-Projektion, und bei der die Packstücke oder Gebinde während des Einhüllens durch den Wickelquerschnitt durch die Bahn der Vorratsrollen-Führeinrichtung(en) geführt werden.The invention relates to a method for helically wrapping packages or containers in a shrink-wrapping film, in which the film is pulled from at least one supply roll under tension and is guided by means of one (or more) supply roll guide device (s) around a winding cross-section which is larger than the axial package projection, and in which the packages or packages are guided through the web of the supply roll guide device (s) during the wrapping through the winding cross section.

Vorgestreckte, nachschrumpfende Folien haben in der Verpackungstechnik in den letzten Jahren einen sehr umfassenden Eingang gefunden. Derartige Folien, beispielsweise unter der Warenbezeichnung PRESTO-STRETCH-GARD, PRESTO-BUNDLE-GARD und PRESTO-STRETCH-GARD IV haben die Eigenschaft, daß ein von ihnen umhüllter Gegenstand aufgrund der verbleibenden Folienspannung zusammengedrückt wird, ohne daß die Folie reißt. Damit unterscheidet sich die Verpackungstechnik mit derartigen vorstreckbaren, nachschrumpfenden Folien erheblich von der mit wärmeschrumpfenden Folien, die ebenfalls in der Verpackungstechnik eingesetzt werden.Pre-stretched, shrink-wrapping films have found extensive use in packaging technology in recent years. Such films, for example under the trade name PRESTO-STRETCH-GARD, PRESTO-BUNDLE-GARD and PRESTO-STRETCH-GARD IV, have the property that an object covered by them is compressed due to the remaining film tension without the film tearing. This means that the packaging technology with such pre-stretchable, shrink-wrapping films differs considerably from that with heat-shrinking films, which are also used in packaging technology.

In der Verpackungstechnik ist ein Verfahren und eine Vorrichtung bekannt (Overwrap-Equipment Co., Fairfield, N. J., USA), bei der durch eine Wickelstation relativ lange Packstücke oder Gebinde hindurchgeschickt werden, und während des Vorschreitens mit Hilfe einer rotierenden Folien-Vorratsrolle umkreist werden, von der die Folie abgewickelt wird. Darüber hinaus ist bekannt, im Bereich von Wickelstationen auch Überbrückungsförderbänder einzusetzen (vgl. DE-OS 31 19 657), so daß auch kürzere Gegenstände transportiert werden, wobei während des Fortschreitens das Überbrückungsförderband und das Packstück/Gebinde eingewickelt werden.In packaging technology, a method and a device are known (Overwrap-Equipment Co., Fairfield, NJ, USA), in which relatively long packages or containers are sent through a winding station and are encircled by a rotating film supply roll as the process proceeds from which the film is unwound. In addition, it is known to use bridging conveyor belts in the area of winding stations (cf. DE-OS 31 19 657), so that even shorter objects are transported, the bridging conveyor belt and the package / container being wrapped as the process progresses.

Die beiden Begriffe "Packstück" und "Gebinde" sind gewählt worden, um zwei unterschiedliche Arten von einzuhüllenden Gegenständen zu charakterisieren: unter "Packstück" wird ein mehr oder weniger geschlossenes, möglicherweise sperriges, aber nicht auseinanderfallendes Gebilde verstanden, beispielsweise eine Teppichrolle, während unter einem "Gebinde" ein Gebilde verstanden werden soll, das aus Kartons, Gegenständen und dergleichen aufgestapelt ist, die bei leichterer Krafteinwirkung, beispielsweise durch die Wickelfolie selbst, von ihrer Unterlage herabgestoßen werden können, oder sich ohne Unterlage verschieben, so daß das "Gebinde" damit nicht mehr die ursprüngliche zu umhüllende Form aufweist.The two terms "package" and "package" have been chosen to characterize two different types of objects to be wrapped: "package" is understood to mean a more or less closed, possibly bulky, but not falling apart structure, for example a carpet roll, while under a "bundle" is to be understood to mean a structure which is stacked out of cardboard boxes, objects and the like, which can be pushed down from its base when a slight force is exerted, for example by the wrapping film itself, or move without a base, so that the "bundle" so that it no longer has the original shape to be encased.

Es zeigt sich, daß insbesondere das Einhüllen von Gebinden der vorstehend gekennzeichneten Art mit den bekannten Verfahren und Vorrichtungen große Schwierigkeiten bereiten, da beispielsweise aufeinandergestapelte, leichte Kartonverpackungen, die mit Plastikgegenständen gefüllt sind, dazu tendieren, bei dem Umwickeln mit einer vorgespannten Stretchfolie aus dem Gebinde herausgedrückt oder verschoben zu werden.It turns out that wrapping containers of the type identified above with the known methods and devices is particularly difficult since, for example, stacked, light cardboard packaging filled with plastic objects tend to wrap with a pre-tensioned stretch film from the container to be pushed out or moved.

Es stellt sich demnach die Aufgabe, ein Verfahren und eine Vorrichtung anzugeben, mit der insbesondere Gebinde aus geschichteten Karton-Verpackungen und leichteren Gegenständen, aber auch Packstücke, ohne die Gefahr einer Verschiebung und unter Aufhebung der durch die Folie auftretenden Torsionsspannungen eingehüllt und gewickelt werden kann.It is therefore the task of specifying a method and a device with which containers in particular made of layered cardboard packaging and lighter objects, but also packages, can be wrapped and wrapped without the risk of displacement and with the torsional stresses arising from the film being eliminated .

Die Lösung dieser Aufgabe ist erfindungsgemäß bei einem Verfahren zum wendelartigen Einhüllen von Packstücke oder Gebinden in einer nachschrumpfenden Folie möglich, bei dem das Einhüllen gleichzeitig von zwei gegenläufig umlaufenden Vorratsrollen erfolgt, die in Förderrichtung der Packstücke bzw. Gebinde hintereinander um wenigstens eine Folienbreite versetzt angeordnet sind.This object is achieved according to the invention in a method for the spiral-like wrapping of packages or containers in a shrinking film, in which the wrapping is carried out simultaneously by two counter-rotating supply rolls which are arranged one behind the other in the conveying direction of the packages or containers by at least one film width .

Durch das gegenläufige Einhüllen der hintereinandergeschalteten Vorratsrollen wird eine vorhandene Torsionsspannung aufgehoben; sie ist praktisch nur auf einer kurzen Wegstrecke überhaupt wirksam. Damit macht es das Verfahren möglich, beispielsweise ein Gebinde von 3 x 3 kg Waschpulverkartons in der eingangs genannten Art in einer Stretchfolie einzuhüllen.Existing torsional tension is eliminated by the opposite wrapping of the supply rolls connected in series; it is practically only effective over a short distance. The method thus makes it possible, for example, to wrap a container of 3 x 3 kg of washing powder boxes in the manner mentioned at the beginning in a stretch film.

Die Zugspannung und die Umlaufgeschwindigkeit der Vorratsrollen können variiert werden; vorzugsweise wird jedoch das Verfahren so angewandt, daß die beiden Vorratsrollen synchron laufen.The tension and the circulation speed of the supply rolls can be varied; however, the method is preferably used in such a way that the two supply rolls run synchronously.

Weiterhin kann durch einen relativ einfachen technischen Trick erreicht werden, daß die Folien beim Transportieren der Packstück/Gebinde sich faltenfrei auflegen, wobei ebenfalls eine gleichmäßige Kraftverteilung auf das Packstück/Gebinde erreicht wird. Das geschieht dadurch, daß die Wickelachse wenigstens einer der beiden Vorratsrollen (vorzugsweise bei beiden) um einen Winkel zwischen 2 - 20 abweichend von der Parallelausrichtung zur Rotationsachse der Vorratsrollen-Führeinrichtung geneigt ist.Furthermore, it can be achieved by a relatively simple technical trick that the foils lay down wrinkle-free during the transport of the package / container, with a uniform distribution of force on the package / container also being achieved. This happens because the winding axis of at least one of the two supply rolls (preferably both) deviates from the parallel orientation by an angle between 2 and 20 is inclined to the axis of rotation of the supply roll guide device.

Schließlich ist möglich, daß die beiden Rollen mit Folien unterschiedlicher Breite bestückt sind und/oder daß die Folienspannung der beiden Vorratsrollen auf verschiedenen Werten gehalten wird. So kann beispielsweise die in Förderrichtung vordere Rolle unter leichterer Zugspannung gehalten werden, während bei der nachfolgenden Vorratsrolle eine erhöhte Zugspannung aufgebracht wird.Finally, it is possible that the two rolls are equipped with films of different widths and / or that the film tension of the two supply rolls is kept at different values. For example, the front roller in the conveying direction can be held under a slight tension, while an increased tension is applied to the subsequent supply roller.

Durch das vorgenannte Verfahren können relativ hohe Stretchkräfte übertragen werden, so daß auch spezielle Stretchfolien verwendet werden können. Da die Stretchfolien an ihrer Oberfläche untereinander haften, läßt sich sehr zuverlässig ein schlauchartiges Gebilde erzeugen, welches auch bei der Förderart gemäß DE-OS 31 19 657 mit Vorteil verwendet werden kann.Relatively high stretch forces can be transmitted by the aforementioned method, so that special stretch films can also be used. Since the stretch films adhere to one another on their surface, a tube-like structure can be produced very reliably, which can also be used with advantage in the mode of conveyance according to DE-OS 31 19 657.

Die Vorrichtung zur Durchführung des Verfahrens, d. h. zum wendelartigen Umhüllen von Packstücken und Gebilden mit einer nachschrumpfenden Folie, weist eine Rollen-Führeinrichtung mit zwei Vorratsrollen auf, die gegenläufig umlaufen und in Förderrichtung um wenigstens eine Folienbreite versetzt sind.The device for performing the method, i. H. For the helical wrapping of packages and structures with a shrinking film, a roller guide device with two supply rolls, which rotate in opposite directions and are offset in the conveying direction by at least one film width.

Abweichend von dieser Ausführungsform lassen sich selbstverständlich auch zwei Laufkränze hintereinander anordnen; diese Ausführungsform hat jedoch den Nachteil, daß sie technisch einen höheren Aufwand erfordert, da üblicherweise zwei Antriebe vorzusehen sind.In a departure from this embodiment, it is of course also possible to arrange two rims one behind the other; However, this embodiment has the disadvantage that it requires a technically higher effort, since two drives are usually to be provided.

Vorzugsweise werden daher die gegenläufig rotierenden Vorratsrollen auf der Vorder- und Rückseite des Rotationsrahmens einer Vorratsrollen-Führeinrichtung rotierbar befestigt.The counter-rotating supply rolls are therefore preferably rotatably attached to the front and back of the rotating frame of a supply roll guide device.

Schließlich ist noch möglich, die aufzubringende Kraft genauer auf Ober- und Unterseite der Packstücke und Gebinde zu verteilen und dabei auch an verschiedene Größen und Durchmesser anpaßbar zu machen, wenn der oder die Rotationsrahmen gegenüber der Förderebene der Packstücke/Gebinde höhen- und/oder seitenverstellbar ist (sind).Finally, it is still possible to distribute the force to be applied more precisely to the top and bottom of the packages and containers and to make them adaptable to different sizes and diameters if the rotary frame or frames can be adjusted in height and / or side with respect to the conveying plane of the packages / containers is (are).

Ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung ist in der Zeichnung dargestellt.An embodiment of the device according to the invention is shown in the drawing.

In der Figur ist in perspektivischer Darstellung eine Vorrichtung zum Einhüllen von Packstücken 1 dargestellt. Die Vorrichtung weist eine Wickelfolien-Führeinrichtung 2 auf, mit der von zwei Vorratsrollen 4, 4' je ein Band einer Wickelfolie 3, 3' abgezogen werden kann. Die Vorratsrollen 4, 4' sind mit einer fliegenden Achse je auf einem Kranz 5, 5' montiert. Jeder der beiden Kränze 5, 5' ist auf seiner Außenseite mit einem Zahnkranz versehen, wobei über zwei Antriebsritzel 6, 6' die gegenläufig rotieren, jedoch von demselben Motor angetrieben sind, die beiden Kränze 5, 5' gegensinnig umlaufen. In Förderrichtung gesehen rotiert der Kranz 5 im Uhrzeigersinne und der Kranz 5' im Gegenuhrzeigersinn.In the figure, a device for wrapping packages 1 is shown in perspective. The device has a wrapping film guide device 2, with which a strip of a wrapping film 3, 3 'can be drawn off from each of two supply rolls 4, 4'. The supply rolls 4, 4 'are each mounted on a ring 5, 5' with a flying axis. Each of the two rings 5, 5 'is provided on its outside with a ring gear, with two driving pinions 6, 6' rotating in opposite directions, but driven by the same motor, rotating the two rings 5, 5 'in opposite directions. Viewed in the direction of conveyance, the ring 5 rotates clockwise and the ring 5 'rotates counterclockwise.

Vor und hinter der mit den beiden Kränzen 5, 5' ausgestatteten Wickelstation sind zwei Förderbänder 7 und 8 angeordnet. In bestimmten Fällen kann ein Überbrückungsförderer (hier nicht dargestellt) das Packstück oder ein Gebinde durch die Kränze 5, 5' hindurchfördern.Two conveyor belts 7 and 8 are arranged in front of and behind the winding station equipped with the two rings 5, 5 '. In certain cases, a bridging conveyor (not shown here) can convey the package or a container through the rings 5, 5 '.

Die eigentliche Wickelstation ist von einem Haltegestell 10 umgeben. Die Führungseinrichtungen, insbesondere die Kränze 5, 5' mit den dazu gehörenden Antriebsvorrichtungen werden von einer Tragwand 11 gehalten, die zwischen die Peripherie der Kränze reicht und die über (nicht dargestellte) Stützvorrichtungen für die Kränze verfügt. Die Mittel, um die Kränze rotieren zu lassen und die Packstücke oder Gebinde zu transportieren, sind an sich bekannt. Bei der Folie handelt es sich um eine sogenannte Stretch-Folie, also um eine nachschrumpfende Folie, die unter Zugspannung von einer der Vorratsrollen 4, 4' abgezogen wird, wobei die Vorratsrollen während des Umwickelns auf einer festen Bahn gegenläufig rotieren. Vom Packstück 1 wird dabei Abstand gehalten. Das Packstück wird während des Einhüllens transportiert, so daß sich beim Einhüllen wendelartig zwei mit gegenläufiger Steigung aufeinanderliegende Wickelfolien-Lagen ergeben.The actual winding station is surrounded by a holding frame 10. The guide devices, in particular the rings 5, 5 'with the associated drive devices, are held by a supporting wall 11 which extends between the periphery of the rings and which has (not shown) support devices for the rings. The means of rotating the wreaths and transporting the packages or containers are known per se. The film is a so-called stretch film, that is to say a shrinking film, which is pulled off under tension from one of the supply rolls 4, 4 ', the supply rolls rotating in opposite directions during wrapping on a fixed path. Distance from package 1 is kept. The package is transported during the wrapping, so that when wrapping, two wrapping foil layers lying one on top of the other with opposite slopes result.

Neu gegenüber dem Stand der Technik ist, daß die Rollen-Führeinrichtung, hier bestehend aus den beiden Kränzen 5, 5' mit zwei Vorratsrollen bestückt ist, die gegenläufig und synchron umlaufen und in Förderrichtung um wenigstens eine Folienbreite versetzt sind.What is new compared to the prior art is that the roller guide device, here consisting of the two rings 5, 5 ', is equipped with two supply rollers which rotate in opposite directions and synchronously and are offset by at least one film width in the conveying direction.

Ein weiteres wesentliches Merkmal ist, daß die.Wickel- achsen der Vorratsrollen zur Rotationsachse der Rahmen 5 bzw. 5' um einen Winkel zwischen 2 - 20o aus der parallelen Ausrichtung geneigt sind, und zwar für die Rolle 4 vom Packstück weg und bei der Rolle 4' zum Packstück hin. Diese Schrägstellung der Rollen bewirkt, daß sich die Folie praktisch faltenfrei und ohne Notwendigkeit weiterer Führungs- und Leitrollen so an das Packstück anlegt, daß es zu einer besonders glatten Bildung eines Folienschlauches kommt.Another essential feature is that the winding axes of the supply rolls are inclined to the axis of rotation of the frame 5 or 5 'by an angle between 2 - 20 o from the parallel orientation, specifically for the roll 4 away from the package and at Roll 4 'to the package. This inclination of the rollers causes the film to lay against the package practically without creases and without the need for additional guide and guide rollers, so that a film tube is formed particularly smoothly.

Es ist auch möglich, die Folien-Vorspannung, die sich nach den Gegebenheiten und der Zusammensetzung des Folienmaterials richtet, bei den beiden Folien verschieden stark auszubilden, beispielsweise die zuerst wickelnde Rolle 4' mit etwas geringerer und die nachfolgende Rolle 4 demgegenüber mit etwas höherer Wickelspannung wickeln zu lassen. Außerdem können verschiedene Folienbreiten, beispielsweise zunächst schmal (Rolle 4'), dann breit (Rolle 4) vorgesehen sein.It is also possible to design the film pre-tension, which depends on the circumstances and the composition of the film material, to be different in the two films, for example the first winding roll 4 'with a slightly lower winding tension and the subsequent roll 4 with a somewhat higher winding tension to wrap. In addition, different film widths, for example initially narrow (roll 4 '), then wide (Roll 4) can be provided.

Weiterhin ist es möglich, die Drehkränze 5, 5,' mit den Wickelrollen, vorzugsweise über die Tragewand 11, die in zwei gegenüberliegenden Führungsleisten 14 geführt ist, mit Hilfe einer Kolben-Zylinder-Anordnung 15 höhenverstellbar zu machen. Damit ergibt sich die Möglichkeit, den Wickelvorgang auf verschiedene Packstück-Höhen auszurichten. Auch eine Seitenverstellbarkeit kann vorgesehen sein, wenn dies bei häufigem Vorkommen besonders sperriger Güter wünschenswert sein sollte.Furthermore, it is possible to make the turntables 5, 5, 'with the winding rollers, preferably via the support wall 11, which is guided in two opposite guide rails 14, adjustable in height by means of a piston-cylinder arrangement 15. This results in the possibility of aligning the winding process to different package heights. Lateral adjustability can also be provided if this should be desirable in the case of frequent occurrence of particularly bulky goods.

Insgesamt ergeben die in den Ansprüchen und bei dem vorbeschriebenen Ausführungsbeispiel genannten Merkmale eine wesentliche Verbesserung für das Einhüllen von Packstücken und Gebinden, da die beim Einhüllen auftretende Torsionsspannung aufgrund der gewendelt gewickelten Folie praktisch völlig unterdrückt wird.Overall, the features mentioned in the claims and in the exemplary embodiment described above result in a significant improvement for the wrapping of packages and containers, since the torsional stress occurring during wrapping is practically completely suppressed due to the coiled film.

Claims (10)

1. Verfahren zum wendelartigen Einhüllen von Packstücken oder Gebinden in einer nachschrumpfenden Folie, bei dem die Folie unter Zugspannung von wenigstens einer Vorratsrolle abgezogen und mittels einer (oder mehrerer) Vorratsrollen-Führeinrichtung(en) um einen Wickelquerschnitt geführt wird, der größer ist als die axiale Packstück-Projektion, und bei der durch die Bahn der Vorratsrol1en-Führeinrichtung(en) die Packstücke oder Gebinde während des Einhüllens durch den Wickelquerschnitt geführt werden,
dadurch gekennzeichnet, daß das Einhüllen gleichzeitig von zwei gegenläufig umlaufenden Vorratsrollen (4, 4') erfolgt, die in Förderrichtung der Packstücke bzw. Gebinde hintereinander um wenigstens eine Folienbreite versetzt angeordnet sind.1. A method for the spiral-like wrapping of packages or containers in a shrinking film, in which the film is pulled from at least one supply roll under tension and is guided by means of one (or more) supply roll guide device (s) around a winding cross-section which is larger than that axial package projection, and in which the packages or bundles are guided through the winding cross-section during wrapping by the path of the supply roll guide device (s),
characterized in that the wrapping is carried out simultaneously by two counter-rotating supply rolls (4, 4 ') which are arranged one behind the other in the conveying direction of the packages or containers by at least one film width. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Vorratsrollen (4, 4') synchron umlaufen.2. The method according to claim 1, characterized in that the two supply rolls (4, 4 ') rotate synchronously. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Winkelachse wenigstens einer der beiden Vorratsrollen um einen Winkel zwischen 2 - 200 abweichend von der Parallelausrichtung zur Rotationsachse der Vorratsrollen-Führeinrichtung geneigt oder angehoben ist.3. The method according to claim 1 or 2, characterized in that the angular axis of at least one of the two supply rolls is inclined or raised by an angle between 2 - 20 0 deviating from the parallel orientation to the axis of rotation of the supply roll guide device. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Rollen (4, 4') mit Folien (3, 3') unterschiedlicher Breite bestückt sind.4. The method according to claim 1, characterized in that the two rollers (4, 4 ') are equipped with foils (3, 3') of different widths. 5. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß die Folienspannung der beiden Vorratsrollen (4, 4') auf verschiedenen Werten gehalten wird.5. The method according to claim 1 or 4, characterized in that the film tension of the two supply rolls (4, 4 ') is kept at different values. 6. Vorrichtung zum wendelartigen Einhüllen von Pack-stücken oder Gebinden mit einer nachschrumpfenden Folie, bei der die Folie unter Zugspannung von wenigstens einer Vorratsrolle abgezogen wird, die während des Umwickelns auf einer festen Bahn einer Vorratsrollen-Führeinrichtung um das Packstück in Abstand zu diesem rotiert, und mit einer Fördervorrichtung, mit der das Packstück während des Vorschubs gestützt und bewegt wird,
dadurch gekennzeichnet, daß die Rollen-Führeinrichtung (2) mit zwei Vorratsrollen (4, 4') bestückt ist, die gegenläufig umlaufen und in Förderrichtung um wenigstens eine Folienbreite versetzt sind.6. Device for helically wrapping packages or containers with a shrinking film, in which the film is pulled off under tension from at least one supply roll, which rotates around the package at a distance from it during wrapping on a fixed track of a supply roll guide device , and with a conveyor device with which the package is supported and moved during the advance,
characterized in that the roller guide device (2) is equipped with two supply rollers (4, 4 ') which rotate in opposite directions and are offset in the conveying direction by at least one film width. 7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Vorratsrollen (4, 4') auf der Vorder- und Rückseite des Rotationsrahmens einer Vorratsrollen-Führeinrichtung (2) rotierbar befestigt sind.7. The device according to claim 6, characterized in that the supply rolls (4, 4 ') on the front and back of the rotating frame of a supply roll guide device (2) are rotatably attached. 8. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Winkelachsen der Vorratsrollen um einen 0 Winkel zwischen 2 und 20 zur Rotationsachse des Rotationsrahmens geneigt oder gehoben sind.8. The device according to claim 6, characterized in that the angular axes of the supply rolls are inclined or raised by a 0 angle between 2 and 20 to the axis of rotation of the rotating frame. 9. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der oder die Rotationskränze (5, 5') gegenüber der Förderebene der Packstücke höhen- und/oder seitenverstellbar ist (sind).9. The device according to claim 6, characterized in that the or the rotating rings (5, 5 ') with respect to the conveying plane of the packages is (and are) adjustable in height and / or side. 10. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Winkelachse der Vorratsrolle, die gegen die Förderrichtung zeigt, geneigt ist, während die Winkelachse der Vorratsrolle, die in Förderrichtung zeigt, angehoben ist.10. The device according to claim 8, characterized in that the angular axis of the supply roll, which points against the conveying direction, is inclined, while the angular axis of the supply roll, which points in the conveying direction, is raised.
EP84112608A 1983-10-29 1984-10-19 Method and device for enveloping packages or bundles in stretch-foil Expired EP0140301B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112608T ATE28306T1 (en) 1983-10-29 1984-10-19 METHOD AND DEVICE FOR WRAPPING PACKAGES OR CONTAINERS IN STRETCH FILM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3339337 1983-10-29
DE19833339337 DE3339337A1 (en) 1983-10-29 1983-10-29 METHOD AND DEVICE FOR ENHANCING PACKAGE PIECES OR CONTAINERS IN SHRINK FILM

Publications (2)

Publication Number Publication Date
EP0140301A1 true EP0140301A1 (en) 1985-05-08
EP0140301B1 EP0140301B1 (en) 1987-07-15

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Application Number Title Priority Date Filing Date
EP84112608A Expired EP0140301B1 (en) 1983-10-29 1984-10-19 Method and device for enveloping packages or bundles in stretch-foil

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US (1) US4723393A (en)
EP (1) EP0140301B1 (en)
AT (1) ATE28306T1 (en)
DE (1) DE3339337A1 (en)

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WO1998025825A1 (en) * 1996-12-13 1998-06-18 Heinrich Oggesen Manufacture of an endless plastic pipe, and equipment required
ITBO20090424A1 (en) * 2009-07-01 2011-01-02 Atlanta Stretch S P A EQUIPMENT FOR THE WINDING OF PRODUCTS WITH FILM OF EXTENSIBLE MATERIAL
WO2017167423A1 (en) 2016-04-01 2017-10-05 Krones Ag Apparatus and method for the angle and speed-based packaging of piece goods batches
CN108698718A (en) * 2016-02-09 2018-10-23 科林斯股份公司 Packing method and machine for the extensible film for feeding product in groups

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EP1090543A1 (en) * 1999-10-05 2001-04-11 Lely Research Holding AG Device and process for wrapping bodies, especially bales of harvested crops
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US9802722B1 (en) * 2006-10-11 2017-10-31 Darrel Bison Pallet roping and wrapping apparatus
CN101616791B (en) * 2006-12-29 2013-08-07 陶氏环球技术有限责任公司 Films, articles prepared therefrom, and methods of making the same
US8356456B2 (en) * 2010-03-04 2013-01-22 Douglas Machine Inc. Apparatus for adjustable wrapping
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CN108698718A (en) * 2016-02-09 2018-10-23 科林斯股份公司 Packing method and machine for the extensible film for feeding product in groups
WO2017167423A1 (en) 2016-04-01 2017-10-05 Krones Ag Apparatus and method for the angle and speed-based packaging of piece goods batches
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Also Published As

Publication number Publication date
US4723393A (en) 1988-02-09
ATE28306T1 (en) 1987-08-15
DE3339337A1 (en) 1985-05-15
DE3339337C2 (en) 1992-05-07
EP0140301B1 (en) 1987-07-15

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