EP0205135B1 - Method for packaging stacked articles disposed on a pallet, and device for putting the method into operation - Google Patents

Method for packaging stacked articles disposed on a pallet, and device for putting the method into operation Download PDF

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Publication number
EP0205135B1
EP0205135B1 EP86107794A EP86107794A EP0205135B1 EP 0205135 B1 EP0205135 B1 EP 0205135B1 EP 86107794 A EP86107794 A EP 86107794A EP 86107794 A EP86107794 A EP 86107794A EP 0205135 B1 EP0205135 B1 EP 0205135B1
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EP
European Patent Office
Prior art keywords
pallet
stack
foil
shrinking
hood
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.)
Expired
Application number
EP86107794A
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German (de)
French (fr)
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EP0205135A1 (en
Inventor
Reiner Wilhelm Hannen
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MSK Verpackungs Systeme GmbH
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MSK Verpackungs Systeme GmbH
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Publication date
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Priority to AT86107794T priority Critical patent/ATE39897T1/en
Publication of EP0205135A1 publication Critical patent/EP0205135A1/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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat

Definitions

  • the invention relates to a method for packaging a stack of goods arranged on a pallet, in particular from bottles, cans or the like, wherein a shrink hood pulled over the stack of goods progressively shrinks in the vertical direction and with one arranged between the stack of goods and the pallet, over the edge of the pallet protruding film is welded, as known from practice.
  • the invention also relates to an apparatus for performing the method.
  • the shrink hood pulled over the stack of goods is shrunk with a shrink frame, from bottom to top, so that the lower edge of the shrink hood below the pallet forms an undershrink and thereby also welds the film placed on the pallet to the shrink hood.
  • the air then remaining in the shrink hood can no longer escape and is also heated during the subsequent shrinking of the shrink hood.
  • the air expands and there is a so-called balloon formation which, under certain circumstances, expands the shrink hood so much that it no longer shrinks completely even after the air has cooled. For this reason, partial vacuum is already generated in the shrink hood during the formation of the shrink hood, which draws the shrink hood onto the stack of goods.
  • the shrink hood which is generally oversized over the stack of goods, folds around the stack of goods and around the pallet, thereby at least partially restricting the heating of the shrink hood material, on the one hand because of the multiple layers in the area of the folds and on the other hand because of the Contact with surface areas of the stack of goods.
  • the shrink hood forms thin spots next to the folds because the heat stays in the folds longer and the shrink hood with its high cold shrink force pulls film material next to the folds, where the heat has unimpeded access.
  • the folds formed in this way generally run downwards at an angle near the four vertical edges of the stack of goods and form so-called rain gutters, in which water that runs down during external storage finds a way and, if necessary, also penetrates through small holes in the fold area to the stack of goods .
  • the object of the invention is to tightly pack a stack of goods, in particular as hygienic packaging.
  • a device for carrying out the method has a parking space or a conveyor for, a stack of goods arranged on a pallet, a device for covering the stack of goods with a shrink hood, which is gripped at its lower edge by grippers, and a shrinking device which can be moved up and down in the vertical direction and a fan located under the parking space or the conveyor.
  • the device is characterized in that at least one movable foil deflector is provided on the parking space or conveyor outside the space occupied by the pallet, but within the working area of the grippers, which protrudes into the area of the stack of goods in its extended position.
  • Foil deflectors are preferably arranged on opposite sides of the conveyor, in particular in such a way that the foil deflectors are located in the region of the end faces of the pallet, because the lengths are the same on standard pallets and only the widths are different.
  • the one or more foil deflectors are extended so that they protrude into the area of the stack of goods.
  • the shrink hood is pulled over the stack of goods, the ones holding the lower edge of the shrink hood
  • the grippers move outside the foil deflectors. After the grippers have released the lower edge of the shrink hood and moved back to their starting position, the shrinking process can begin, the lower part of the shrink hood being kept away from the stack of goods, the pallet and the film lying on the pallet at least in regions.
  • the film deflectors When the shrinkage reaches the area of the film deflectors, they are removed, for which purpose the film deflectors are preferably pivotably mounted about a horizontal axis and have a swivel drive. The shrinkage then progresses to the lower edge of the shrink hood, and welding is also carried out with the film lying on the pallet.
  • the foil deflectors can be fork-shaped and accordingly have fork tines.
  • the foil deflectors can also be designed as air duct, z. B. in the form of pipes or apertured boxes so that air can be blown under the shrink hood during most of the shrinking process.
  • the surface of the film bumpers can be coated with PTFE (polytetrafluoroethylene).
  • the film deflectors can have a holding device for the lower edge of the shrink hood so that the shrink hood pulled over the stack of material does not slide upwards during the shrinking.
  • the device can also be equipped with a lifting device for lifting the pallet. In this case, the foil deflectors can preferably be moved in the same direction as the pallet moved by the lifting device.
  • a conveyor 1 is shown on which pallets 2 with a stack of goods 3 arranged thereon are transported from bottles.
  • a film 4 On the top of the pallet 2 is a film 4, which protrudes beyond the edge of the pallet.
  • the stack of goods 3 is arranged on the film 4.
  • the stack of goods 3 and the pallet 2 are to be covered with a shrink hood 5 and shrunk in such a way that the shrink hood 5 is welded to the edge of the film 4 and, at the same time, a lower shrinkage is formed under the underside of the pallet 2.
  • a device for covering the stack of goods with a shrink hood In the area of the conveyor 1 there is a device for covering the stack of goods with a shrink hood. Of this device, only grippers 6 are shown, which grip the lower edge 7 of the shrink hood 5 and pull the open shrink hood 5 over the stack 3 of goods.
  • the lower edge 7 of the shrink hood 5 is also pulled over film deflectors 8 arranged on both sides of the conveyor 1, which are pivotally mounted laterally on the conveyor 1 and with the aid of a drive 9, which in the embodiment shown is a compressed air cylinder, in the direction of the double arrows 10 in Fig. 2 are pivotable.
  • the film deflectors 8, of which only one is shown in FIG. 1 are pivoted up onto the stack of goods 3 before the shrink hood 5 is pulled over. They remain in this position even when the grippers 6 have released the lower edge 7 of the shrink hood 5 and have returned to their starting position.
  • the shrink hood 5 can be shrunk - with a frame-shaped shrinking device, the frame of which is somewhat larger than the base of the stack of goods 3 and hot gas is blown from the frame rods onto the shrink hood 5.
  • the shrinking device moves from top to bottom along the stack of goods 3.
  • air is blown under the shrink hood 5 via the foil deflectors 8, which are hollow in the embodiment shown, so that a uniform shrinkage and a wrinkle-free application of the Shrink hood 5 is reached on stack 3.
  • the foil deflectors 8 also have a surface layer of PTFE, so that the heated material of the shrink hood 5 does not get caught on them.
  • the film deflectors 8 can be provided with holding devices or a rough surface so that the lower regions of the shrink hood 5 do not slide upwards when shrinking.
  • a lifting device 12 is provided in the area of the conveyor 1 or between the two conveyor tracks, with which the pallet 2 can be raised as shown, so that the underside of the pallet 2 is free. This gives the possibility of producing a shrinkage by which the stack of goods 3 is additionally held on the pallet 2.

Abstract

1. A method for packaging a stack of products, in particular bottles, jars or the like, disposed on a pallet, according to which a shrinking hood (5) drawn over the stack (3) is progressively shrunk in the vertical direction and is welded to a foil (4) disposed between the stack and the pallet (2) and projecting over the edge of the pallet (2), characterised in that the lower free edge (7) of the shrinking hood (5) drawn over the stack (3) is at least in part held away from the pallet and the foil (4) disposed thereon, that the shrinking hood (5) is shrunk from the top towards the bottom, and that the free edge (7) of the shrinking hood (5) is released and low pressure is created under the shrinking hood (5) shortly before shrinkage reaches the pallet (2).

Description

Die Erfindung betrifft ein Verfahren zum Verpacken eines auf einer Palette angeordneten Gutstapels, insbesondere aus Flaschen, Dosen o. dgl., wobei eine über den Gutstapel gezogene Schrumpfhaube in vertikaler Richtung fortschreitend geschrumpft und mit einer zwischen Gutstapel und Palette angeordneten, über den Rand der Palette vorstehenden Folie verschweißt wird, wie aus der Praxis bekannt.The invention relates to a method for packaging a stack of goods arranged on a pallet, in particular from bottles, cans or the like, wherein a shrink hood pulled over the stack of goods progressively shrinks in the vertical direction and with one arranged between the stack of goods and the pallet, over the edge of the pallet protruding film is welded, as known from practice.

Die Erfindung betrifft auch eine Vorrichtung zur Durchführung des Verfahrens.The invention also relates to an apparatus for performing the method.

Von Herstellern für Lebensmittelverpackungen, z. B. der Glasindustrie, Dosenindustrie, Kunststoff-Flaschenindustrie u. dgl. wird verlangt, daß ihre Produkte hermetisch geschlossen mit einer Folie auf einer Palette verpackt in sogenannter Hygieneverpackung angeliefert werden. Zum Verpacken dieser Gutstapel legt man auf die Oberseite einer leeren Palette eine Folie oder einen Kartonzuschnitt und darauf den Gutstapel. Der Gutstapel und die Palette werden dann mit ein oder zwei Schrumpfhauben überzogen, wobei die Schrumpfhaube mit der auf die Palette aufgelegten Folie so gut wie luftdicht verschweißt wird. Üblicherweise wird die über den Gutstapel gezogene Schrumpfhaube mit einem Schrumpfrahmen geschrumpft, und zwar von unten nach oben, so daß der untere Rand der Schrumpfhaube unterhalb der Palette einen Unterschrumpf bildet und dabei auch die auf die Palette gelegte Folie mit der Schrumpfhaube verschweißt. Die dann in der Schrumpfhaube verbleibende Luft kann nun nicht mehr entweichen und wird beim nachfolgenden Schrumpfen der Schrumpfhaube mit erwärmt. Die Luft dehnt sich aus, und es kommt zu einer sogenannten Ballonbildung, die unter Umständen die Schrumpfhaube so stark aufdehnt, daß sie auch nach dem Erkalten der Luft nicht mehr vollständig zurückschrumpft. Teilweise wird deswegen bereits während der Bildung des Unterschrumpfes in der Schrumpfhaube ein Unterdruck erzeugt, der die Schrumpfhaube an den Gutstapel ansaugt.From manufacturers for food packaging, e.g. B. the glass industry, can industry, plastic bottle industry u. The like. It is required that their products are delivered hermetically sealed with a film on a pallet in so-called hygienic packaging. To pack these stacks of goods, place a film or cardboard blank on top of an empty pallet and the stack of goods on top. The stack of goods and the pallet are then covered with one or two shrink hoods, the shrink hood being welded virtually airtight with the film placed on the pallet. Usually, the shrink hood pulled over the stack of goods is shrunk with a shrink frame, from bottom to top, so that the lower edge of the shrink hood below the pallet forms an undershrink and thereby also welds the film placed on the pallet to the shrink hood. The air then remaining in the shrink hood can no longer escape and is also heated during the subsequent shrinking of the shrink hood. The air expands and there is a so-called balloon formation which, under certain circumstances, expands the shrink hood so much that it no longer shrinks completely even after the air has cooled. For this reason, partial vacuum is already generated in the shrink hood during the formation of the shrink hood, which draws the shrink hood onto the stack of goods.

Nachteilig dabei ist jedoch, daß die im allgemeinen mit Übergröße über den Gutstapel gezogene Schrumpfhaube sich in Falten um den Gutstapel und um die Palette legt, wodurch zumindest bereichsweise die Aufheizung des Schrumpfhaubenmaterials beschränkt wird, einerseits wegen der Mehrfachlagen im Bereich der Falten und andererseits wegen des Kontaktes mit Oberflächenbereichen des Gutstapels. Außerdem bildet die Schrumpfhaube nach dem Schrumpfen Dünnstellen neben den Falten, weil die Wärme länger in den Falten bleibt und die Schrumpfhaube mit ihrer hohen Kaltschrumpfkraft Folienmaterial neben den Falten zieht, wo die Wärme ungehindert Zutritt hat. Die dabei gebildeten Falten laufen in der Regel schräg in der Nähe der vier vertikalen Kanten des Gutstapels nach unten und bilden sogenannte Regenrinnen, in denen sich bei Au- ßenlagerung herunterlaufendes Wasser einen Weg sucht und ggf. auch durch kleine Löcher im Faltenbereich bis zum Gutstapel vordringt.A disadvantage of this, however, is that the shrink hood, which is generally oversized over the stack of goods, folds around the stack of goods and around the pallet, thereby at least partially restricting the heating of the shrink hood material, on the one hand because of the multiple layers in the area of the folds and on the other hand because of the Contact with surface areas of the stack of goods. In addition, after shrinking, the shrink hood forms thin spots next to the folds because the heat stays in the folds longer and the shrink hood with its high cold shrink force pulls film material next to the folds, where the heat has unimpeded access. The folds formed in this way generally run downwards at an angle near the four vertical edges of the stack of goods and form so-called rain gutters, in which water that runs down during external storage finds a way and, if necessary, also penetrates through small holes in the fold area to the stack of goods .

Aufgabe der Erfindung ist es, einen Gutstapel, insbesondere als Hygieneverpackung, dicht zu verpacken.The object of the invention is to tightly pack a stack of goods, in particular as hygienic packaging.

Diese Aufgabe wird bei dem eingangs beschriebenen Verfahren dadurch gelöst, daß der untere Rand der über den Gutstapel gezogenen Schrumpfhaube wenigstens bereichsweise von der Palette und der darauf angeordneten Folie ferngehalten wird, daß die Schrumpfhaube von oben nach unten geschrumpft wird und daß der freie Rand der Schrumpfhaube freigegeben sowie unter der Schrumpfhaube ein Unterdruck erzeugt wird, kurz bevor die Schrumpfung die Palette erreicht.This object is achieved in the method described at the outset in that the lower edge of the shrink hood pulled over the stack of goods is kept at least in regions from the pallet and the film arranged thereon, that the shrink hood is shrunk from top to bottom and that the free edge of the shrink hood released and a vacuum is generated under the shrink hood just before the shrinkage reaches the pallet.

Hierbei würde die Gefahr der eingangs beschriebenen Faltenbildung vermieden, weil eine Verschweißung der Schrumpfhaube mit der auf die Palette gelegten Folie erst unmittelbar vor Abschluß des Schrumpfvorganges erfolgt. Dadurch, daß der untere Rand der Schrumpfhaube während des Schrumpfens von der Folie ferngehalten wird, kann Luft aus der Schrumpfhaube entweichen. Es ist sogar möglich, die Schrumpfhaube während des größten Teils des Schrumpfvorganges unter Überdruck zu halten, um jede Faltenbildung zu unterbinden und eine gleichmäßige Anlage der geschrumpften Schrumpfhaube am Gutstapel zu erzielen. Ohne weiteres kann unterhalb der Palette auch ein Unterschrumpf erzeugt werden, wenn eine genügend lange Schrumpfhaube verwendet wird und wenn der freie Rand der Schrumpfhaube freigegeben wird, bevor die Schrumpfung die Palettenunterkante erreicht.This would avoid the risk of wrinkles described at the outset because the shrink hood is only welded to the film placed on the pallet immediately before the shrinking process is completed. Because the lower edge of the shrink hood is kept away from the film during shrinking, air can escape from the shrink hood. It is even possible to keep the shrink hood under positive pressure during most of the shrinking process in order to prevent any wrinkling and to achieve an even contact of the shrunk shrink hood with the stack of goods. Undershrinkage can also easily be created below the pallet if a sufficiently long shrink hood is used and if the free edge of the shrink hood is released before the shrinkage reaches the bottom edge of the pallet.

Eine Vorrichtung zur Durchführung des Verfahrens besitzt einen Stellplatz oder einen Förderer für, einen auf einer Palette angeordneten Gutstapel, eine Einrichtung zum Überziehen des Gutstapels mit einer Schrumpfhaube, die an ihrem unteren Rand von Greifern erfaßt wird, eine in vertikaler Richtung auf- und abbewegbare Schrumpfeinrichtung und ein unter dem Stellplatz oder dem Förderer angeordnetes Gebläse. Die Vorrichtung ist dadurch gekennzeichnet, daß am Stellplatz oder Förderer außerhalb des von der Palette beanspruchten Raums jedoch innerhalb des Arbeitsbereiches der Greifer wenigstens ein beweglicher Folienabweiser vorgesehen ist, der in seiner ausgefahrenen Stellung bis in den Bereich des Gutstapels ragt. Vorzugsweise sind Folienabweiser auf gegenüberliegenden Seiten des Förderers angeordnet, insbesondere so, daß die Folienabweiser sich im Bereich der Stirnseiten der Palette befinden, weil an genormten Paletten die Längen gleich und nur die Breiten unterschiedlich sind. Der oder die Folienabweiser werden ausgefahren, so daß sie bis in den Bereich des Gutstapels ragen. Dann wird die Schrumpfhaube über den Gutstapel gezogen, wobei die den unteren Rand der Schrumpfhaube haltenden Greifer sich außerhalb der Folienabweiser bewegen. Nachdem die Greifer den unteren Rand der Schrumpfhaube freigegeben haben und wieder in ihre Ausgangsposition zurückgefahren sind, kann der Schrumpfvorgang beginnen, wobei der untere Teil der Schrumpfhaube von den Folienabweisern wenigstens bereichsweise vom Gutstapel, der Palette und der auf der Palette aufliegenden Folie ferngehalten werden.A device for carrying out the method has a parking space or a conveyor for, a stack of goods arranged on a pallet, a device for covering the stack of goods with a shrink hood, which is gripped at its lower edge by grippers, and a shrinking device which can be moved up and down in the vertical direction and a fan located under the parking space or the conveyor. The device is characterized in that at least one movable foil deflector is provided on the parking space or conveyor outside the space occupied by the pallet, but within the working area of the grippers, which protrudes into the area of the stack of goods in its extended position. Foil deflectors are preferably arranged on opposite sides of the conveyor, in particular in such a way that the foil deflectors are located in the region of the end faces of the pallet, because the lengths are the same on standard pallets and only the widths are different. The one or more foil deflectors are extended so that they protrude into the area of the stack of goods. Then the shrink hood is pulled over the stack of goods, the ones holding the lower edge of the shrink hood The grippers move outside the foil deflectors. After the grippers have released the lower edge of the shrink hood and moved back to their starting position, the shrinking process can begin, the lower part of the shrink hood being kept away from the stack of goods, the pallet and the film lying on the pallet at least in regions.

Wenn die Schrumpfung den Bereich der Folienabweiser erreicht, werden sie entfernt, wozu die Folienabweiser vorzugsweise um eine horizontale Achse schwenkbar gelagert sind und einen Schwenkantrieb aufweisen. Die Schrumpfung schreitet dann bis zum unteren Rand der Schrumpfhaube fort, wobei auch eine Verschweißung mit der auf der Palette aufliegenden Folie erfolgt.When the shrinkage reaches the area of the film deflectors, they are removed, for which purpose the film deflectors are preferably pivotably mounted about a horizontal axis and have a swivel drive. The shrinkage then progresses to the lower edge of the shrink hood, and welding is also carried out with the film lying on the pallet.

Für die Gestaltung der Folienabweiser bestehen mehrere Möglichkeiten. Die Folienabweiser können gabelförmig ausgebildet sein und dementsprechend Gabelzinken aufweisen.There are several options for the design of the foil deflectors. The foil deflectors can be fork-shaped and accordingly have fork tines.

Die Folienabweiser können aber auch als Luftführungskanäle ausgebildet sein, z. B. in Form von Rohren oder mit Öffnungen versehenen Kästen, so daß während des größten Teils des Schrumpfvorganges Luft unter die Schrumpfhaube geblasen werden kann.The foil deflectors can also be designed as air duct, z. B. in the form of pipes or apertured boxes so that air can be blown under the shrink hood during most of the shrinking process.

Damit das erwärmte Material der Schrumpffolie nicht an den Folienabweisern haftet, kann die Oberfläche der Folienabweiser mit PTFE (Polytetrafluoräthylen) beschichtet sein. Ferner können die Folienabweiser eine Halteeinrichtung für den unteren Rand der Schrumpfhaube aufweisen, so daß die über den Gutstapel gezogene Schrumpfhaube während des Schrumpfens nicht nach oben wegrutscht. Sollen die Paletten mit Gutstapel auch einen Unterschrumpf erhalten, dann kann die Vorrichtung auch mit einer Hubeinrichtung zum Anheben der Palette ausgerüstet sein. In diesem Fall sind die Folienabweiser vorzugsweise gleichsinnig mit der von der Hubeinrichtung bewegten Palette bewegbar.So that the heated material of the shrink film does not adhere to the film bumpers, the surface of the film bumpers can be coated with PTFE (polytetrafluoroethylene). Furthermore, the film deflectors can have a holding device for the lower edge of the shrink hood so that the shrink hood pulled over the stack of material does not slide upwards during the shrinking. If the pallets with stack of goods are also to be shrink-wrapped, the device can also be equipped with a lifting device for lifting the pallet. In this case, the foil deflectors can preferably be moved in the same direction as the pallet moved by the lifting device.

Im folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert ; es zeigen :

  • Fig. 1 in schematischer Darstellung eine Vorrichtung zum Verpacken eines auf einer Palette angeordneten Gutstapels,
  • Fig. 2 teilweise den Gegenstand nach Fig. 1 in anderer Ansicht.
In the following an embodiment of the invention shown in the drawing is explained; show it :
  • 1 shows a schematic representation of a device for packaging a stack of goods arranged on a pallet,
  • Fig. 2 partially the object of FIG. 1 in a different view.

In der Zeichnung ist ein Förderer 1 dargestellt, auf dem Paletten 2 mit einem darauf angeordneten Gutstapel 3 aus Flaschen transportiert werden. Auf der Oberseite der Palette 2 liegt eine Folie 4, die über den Rand der Palette übersteht. Auf der Folie 4 ist der Gutstapel 3 angeordnet. Der Gutstapel 3 und die Palette 2 sollen mit einer Schrumpfhaube 5 überzogen und derart eingeschrumpft werden, daß die Schrumpfhaube 5 mit dem Rand der Folie 4 verschweißt und gleichzeitig ein sich unter die Unterseite der Palette 2 legender Unterschrumpf gebildet wird.In the drawing, a conveyor 1 is shown on which pallets 2 with a stack of goods 3 arranged thereon are transported from bottles. On the top of the pallet 2 is a film 4, which protrudes beyond the edge of the pallet. The stack of goods 3 is arranged on the film 4. The stack of goods 3 and the pallet 2 are to be covered with a shrink hood 5 and shrunk in such a way that the shrink hood 5 is welded to the edge of the film 4 and, at the same time, a lower shrinkage is formed under the underside of the pallet 2.

Im Bereich des Förderers 1 befindet sich eine Einrichtung zum Überziehen des Gutstapels mit einer Schrumpfhaube. Von dieser Einrichtung sind lediglich Greifer 6 dargestellt, die den unteren Rand 7 der Schrumpfhaube 5 erfassen und die geöffnete Schrumpfhaube 5 über den Gutstapel 3 ziehen.In the area of the conveyor 1 there is a device for covering the stack of goods with a shrink hood. Of this device, only grippers 6 are shown, which grip the lower edge 7 of the shrink hood 5 and pull the open shrink hood 5 over the stack 3 of goods.

Dabei wird der untere Rand 7 der Schrumpfhaube 5 auch über beidseits des Förderers 1 angeordnete Folienabweiser 8 gezogen, die schwenkbar seitlich am Förderer 1 gelagert sind und mit Hilfe eines Antriebes 9, der bei der dargestellten Ausführung ein Druckluftzylinder ist, in Richtung der Doppelpfeile 10 in Fig. 2 verschwenkbar sind. Die Folienabweiser 8, von denen in Fig. 1 nur einer dargestellt ist, werden vor dem Überziehen der Schrumpfhaube 5 auf den Gutstapel 3 hochgeschwenkt. Sie bleiben in dieser Position auch dann, wenn die Greifer 6 den unteren Rand 7 der Schrumpfhaube 5 freigegeben haben und wieder in ihre Ausgangsstellung zurückgefahren sind.The lower edge 7 of the shrink hood 5 is also pulled over film deflectors 8 arranged on both sides of the conveyor 1, which are pivotally mounted laterally on the conveyor 1 and with the aid of a drive 9, which in the embodiment shown is a compressed air cylinder, in the direction of the double arrows 10 in Fig. 2 are pivotable. The film deflectors 8, of which only one is shown in FIG. 1, are pivoted up onto the stack of goods 3 before the shrink hood 5 is pulled over. They remain in this position even when the grippers 6 have released the lower edge 7 of the shrink hood 5 and have returned to their starting position.

Nunmehr kann die Schrumpfhaube 5 geschrumpft werden, - und zwar mit einer rahmenförmigen Schrumpfeinrichtung, deren Rahmen etwas größer ist als die Grundfläche des Gutstapels 3 und aus deren Rahmenstäben Heißgas auf die Schrumpfhaube 5 geblasen wird. Die Schrumpfeinrichtung bewegt sich von oben nach unten längs des Gutstapels 3. Während des größten Teils des Schrumpfvorganges wird über die Folienabweiser 8, die bei der dargestellten Ausführung hohl ausgebildet sind, Luft unter die Schrumpfhaube 5 geblasen, damit eine gleichmäßige Schrumpfung und ein faltenfreies Anlegen der Schrumpfhaube 5 am Gutstapel 3 erreicht wird.Now the shrink hood 5 can be shrunk - with a frame-shaped shrinking device, the frame of which is somewhat larger than the base of the stack of goods 3 and hot gas is blown from the frame rods onto the shrink hood 5. The shrinking device moves from top to bottom along the stack of goods 3. During most of the shrinking process, air is blown under the shrink hood 5 via the foil deflectors 8, which are hollow in the embodiment shown, so that a uniform shrinkage and a wrinkle-free application of the Shrink hood 5 is reached on stack 3.

Die Folienabweiser 8 besitzen eine Oberflächenschicht auch PTFE, damit das erwärmte Material der Schrumpfhaube 5 nicht an ihnen hängen bleibt. Außerdem können die Folienabweiser 8 mit Halteeinrichtungen oder geraunter Oberfläche versehen sein, damit die unteren Bereiche der Schrumpfhaube 5 beim Schrumpfen nicht nach oben rutschen.The foil deflectors 8 also have a surface layer of PTFE, so that the heated material of the shrink hood 5 does not get caught on them. In addition, the film deflectors 8 can be provided with holding devices or a rough surface so that the lower regions of the shrink hood 5 do not slide upwards when shrinking.

Wenn die Schrumpfeinrichtung in den Bereich der Folienabweiser 8 kommt, werden diese in Richtung der Doppelpfeile 10 in horizontale Position geschwenkt. Dann wird ein unterhalb des Förderers bzw. zwischen den dargestellten Förderbahnen angeordnetes Sauggebläse 11 in Betrieb genommen, welches unterhalb der Palette 2 einen Unterdruck erzeugt, der sich bis in den Raum unter der Schrumpfhaube 5 fortsetzt. Der untere Bereich der Schrumpfhaube 5 legt sich dadurch dicht an den Gutstapel 3 an und auch an den überstehenden Rand der auf der Palette 2 befindlichen Folie 4. Beim weiteren Absenken der Schrumpfeinrichtung wird dann der Rand der Folie 4 mit der Schrumpfhaube dicht verschweißt.When the shrinking device comes into the area of the film deflectors 8, these are pivoted in the direction of the double arrows 10 into the horizontal position. Then, a suction blower 11 arranged below the conveyor or between the conveyor tracks shown is put into operation, which generates a vacuum below the pallet 2, which continues into the space under the shrink hood 5. The lower area of the shrink hood 5 thereby lies tightly against the stack of goods 3 and also against the protruding edge of the film 4 located on the pallet 2. When the shrinking device is further lowered, the edge of the film 4 is then tightly welded to the shrink hood.

Bei der dargestellten Ausführung ist im Bereich des Förderers 1 bzw. zwischen den beiden Förderbahnen eine Hubeinrichtung 12 vorgesehen, mit der die Palette 2 wie dargestellt angehoben werden kann, so daß die Unterseite der Palette 2 frei wird. Damit ist die Möglichkeit gegeben, einen Unterschrumpf herzustellen, durch den der Gutstapel 3 zusätzlich an der Palette 2 gehalten wird.In the embodiment shown, a lifting device 12 is provided in the area of the conveyor 1 or between the two conveyor tracks, with which the pallet 2 can be raised as shown, so that the underside of the pallet 2 is free. This gives the possibility of producing a shrinkage by which the stack of goods 3 is additionally held on the pallet 2.

Claims (12)

1. A method for packaging a stack of products, in particular bottles, jars or the like, disposed on a pallet, according to which a shrinking hood (5) drawn over the stack (3) is progressively shrunk in the vertical direction and is welded to a foil (4) disposed between the stack and the pallet (2) and projecting over the edge of the pallet (2), characterised in that the lower free edge (7) of the shrinking hood (5) drawn over the stack (3) is at least in part held away from the pallet and the foil (4) disposed thereon, that the shrinking hood (5) is shrunk from the top towards the bottom, and that the free edge (7) of the shrinking hood (5) is released and low pressure is created under the shrinking hood (5) shortly before shrinkage reaches the pallet (2).
2. A method according to claim 1, characterised in that, to form an undershrinkage beneath the pallet (2), the free edge (7) of the shrinking hood (5) is released by lifting the pallet before shrinkage reaches the lower edge of the pallet.
3. A method according to claim 1 or 2, characterised in that the shrinking hood (5) is kept under low pressure for the greater part of the shrinking process.
4. A device for carrying out the method according to one of claims 1 to 3, with a depositing station or a conveyor (1) for a stack (3) disposed on a pallet (2), a device for covering the stack with a shrinking hood (5), which is gripped by its lower edge (7) by grippers (6), a shrinking device which is movable up and down, and a fan (11) disposed under the depositing space or conveyor, characterised in that at least one movable foil separator (8) is disposed on the depositing space or conveyor (1) outside the space occupied by the pallet (2), but within the operating range of the grippers (6), the said foil separator (8) projecting, in its extended position, as far as the stack of products.
5. A device according to claim 4, characterised by foil separators (8) on opposite sides of the depositing space or conveyor (1).
6. A device according to claim 4 or 5, characterised in that the foil separators (8) are pivotably mounted about a horizontal axis and have a pivot drive (9).
7. A device according to one of claims 4 to 6, characterised in that the foil separators (8) are fork-shaped and have fork arms.
8. A device according to one of claims 4 to 7, characterised in that the foil separators (8) are formed as air-conducting channels.
9. A device according to one of claims 4 to 8, characterised in that the surfaces of the foil separators (8) are coated with PIFE.
10. A device according to one of claims 4 to 9, characterised in that the foil separators (8) have a holding device for the lower edge (7) of the shrink foil (5).
11. A device according to one of claims 4 to 10, characterised by a lifting device (12) for lifting the pallet (2).
12. A device according to one of claims 4 to 11, characterised in that the foil separators (8) are movable in the same direction as the pallet (2) moved by the lifting device (12).
EP86107794A 1985-06-14 1986-06-07 Method for packaging stacked articles disposed on a pallet, and device for putting the method into operation Expired EP0205135B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86107794T ATE39897T1 (en) 1985-06-14 1986-06-07 METHOD FOR PACKAGING A STACK OF GOODS ARRANGED ON A PALLET AND DEVICE FOR CARRYING OUT THE METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3521416 1985-06-14
DE19853521416 DE3521416A1 (en) 1985-06-14 1985-06-14 METHOD FOR PACKING A PACK OF GOODS ARRANGED ON A PALLET, AND DEVICE FOR IMPLEMENTING THE METHOD

Publications (2)

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EP0205135A1 EP0205135A1 (en) 1986-12-17
EP0205135B1 true EP0205135B1 (en) 1989-01-11

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EP86107794A Expired EP0205135B1 (en) 1985-06-14 1986-06-07 Method for packaging stacked articles disposed on a pallet, and device for putting the method into operation

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EP (1) EP0205135B1 (en)
AT (1) ATE39897T1 (en)
DE (2) DE3521416A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2026858T3 (en) * 1987-03-26 1992-05-16 Vfi Gesellschaft Fur Verpackungstechnik Mbh PROCEDURE AND DEVICE FOR THE RETRACTION OF A WRAPPING SHEET.
DE8816085U1 (en) * 1988-12-24 1989-03-09 Msk-Verpackungs-Systeme Gmbh, 4190 Kleve, De
FR2850949B1 (en) * 2003-02-10 2005-10-21 Thimon DEVICE AND METHOD FOR PACKAGING A PALLETIZED LOAD USING A THERMORETRACTABLE PLASTIC FILM COVER
US7699171B2 (en) * 2004-11-20 2010-04-20 Consolidated Container Company Lp Stackable containers and methods of manufacturing, stacking, and shipping the same
EP2592006B1 (en) 2010-09-27 2014-07-16 Felix Waldner GmbH Method for packaging a packed item and packaging for a packed item
DE102015122597A1 (en) * 2015-12-22 2017-06-22 Gebr. Heinemann SE & Co. KG Method and device for tamper-evident sealing of packaged goods
EP4166463B1 (en) 2021-10-15 2024-04-03 Felix Waldner GmbH Method for packaging a packed item and packaging for a packed item

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2082861A5 (en) * 1970-03-25 1971-12-10 Hurdequint Louis Shrink-wrapping oven - drops over a pack to shrink the bag mouth uniformly using directional hot air jets
FR2161527A7 (en) * 1971-11-23 1973-07-06 Applic Thermiques
EP0116124B2 (en) * 1982-12-30 1992-11-04 MSK-Verpackungs-Systeme Gesellschaft mit beschränkter Haftung Method and device for shrinking a shrinkable hood drawn over a stack of goods
DE3327996A1 (en) * 1983-08-03 1985-02-14 MSK - Verpackungs-Systeme GmbH, 4190 Kleve METHOD FOR PACKING PALLETIZED GOODS STACKS AND DEVICE FOR CARRYING OUT THIS METHOD

Also Published As

Publication number Publication date
ATE39897T1 (en) 1989-01-15
DE3661714D1 (en) 1989-02-16
DE3521416A1 (en) 1986-12-18
EP0205135A1 (en) 1986-12-17

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