EP0030346B1 - Device for shrinking shrinkable wrappings drawn over a stack of produce - Google Patents

Device for shrinking shrinkable wrappings drawn over a stack of produce Download PDF

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Publication number
EP0030346B1
EP0030346B1 EP80107509A EP80107509A EP0030346B1 EP 0030346 B1 EP0030346 B1 EP 0030346B1 EP 80107509 A EP80107509 A EP 80107509A EP 80107509 A EP80107509 A EP 80107509A EP 0030346 B1 EP0030346 B1 EP 0030346B1
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EP
European Patent Office
Prior art keywords
stack
goods
mast
pressure plate
guides
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
EP80107509A
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German (de)
French (fr)
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EP0030346A1 (en
Inventor
Rainer Wilhelm Hannen
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.)
MSK Verpackungs Systeme GmbH
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MSK Verpackungs Systeme GmbH
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Publication date
Application filed by MSK Verpackungs Systeme GmbH filed Critical MSK Verpackungs Systeme GmbH
Priority to AT80107509T priority Critical patent/ATE5807T1/en
Publication of EP0030346A1 publication Critical patent/EP0030346A1/en
Application granted granted Critical
Publication of EP0030346B1 publication Critical patent/EP0030346B1/en
Expired legal-status Critical Current

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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 device for shrinking shrink hoods drawn on a stack of goods, consisting of a storage space for the stack of goods and a mast arranged next to it, to which a shrinking device working with a hot gas and attached to the edge of the storage surface or around the stack of goods is attached.
  • Stacks of goods which are surrounded by a shrink hood for protection are pressed before the shrink hood shrinks in order to reduce the volume of the stack of goods and thereby improve its stability.
  • the pressing on the one hand and the shrinking on the other hand takes place at different processing stations.
  • a device for shrinking generally has the basic structure explained at the beginning, cf. FR-A-2 136 112.
  • the disadvantage here is that the volume of the stack of goods increases again between pressing and shrinking, because the compressible material of the stack of goods expands.
  • the invention seeks to remedy this.
  • the object of the invention is therefore to reduce the size of a stack of goods made of compressible material covered with a shrink hood.
  • the mast has vertical guides for an up and down movable press ram for compressing the stack of goods and that the shrinking device can be guided around the stack of goods and is mounted above the guides on a support arm extending from the upper end of the mast.
  • the device according to the invention enables pressing and shrinking in a single operation. This not only saves an additional processing station but also personnel and time.
  • the stacks of goods processed with the device according to the invention have the smallest possible volume in accordance with the applied pressing pressure, which does not increase even after processing, because the shrinking stresses of the shrink film are sufficient to keep the stack of goods in the final shape.
  • the device according to the invention also enables the use of smaller shrink hoods and thus material savings because the shrink hoods used can be designed for the smallest possible size in accordance with the applied pressing pressure.
  • a practical embodiment is characterized in that the press ram has a cantilever arm extending up to the footprint with a pressure plate held thereon for loading the top of the stack of goods.
  • the press ram can also be moved up and down, stacks of goods of different heights can also be pressed together.
  • the pressure is distributed evenly over the surface of the pressure plate, so that undesirably high surface pressures do not occur.
  • the area of the pressure plate can be adapted to the area of the stack of goods.
  • the pressure plate can have an adjustable size or can be detached, i.e. H. be exchangeably connected to the cantilever, so that the use of different sized printing plates is possible.
  • the printing plate can have a closed printing surface.
  • a pressure plate with openings for supplying heat to the shrink film is more advantageous because the shrink hood is then also shrunk on the top of the stack of goods. It is useful to arrange the pressure plate on the cantilever so that it can adjust to the surface of the stack of goods.
  • the pressure plate can be connected to the cantilever in a simply articulated or cardanic manner.
  • the guides for the press ram are advantageously arranged on the side of the mast facing the standing surface or the stack of goods located thereon.
  • a simple embodiment is characterized in that the guides consist of U-shaped rails in which the press ram is guided and supported with slide shoes or rollers.
  • the press ram In order to drive the press ram, it can be connected to a strand of an endless chain which is guided in the region of the upper and lower ends of the mast via chain wheels, one of which can be driven by a motor, in particular an electric motor.
  • the motor can be controlled in a suitable manner, with limit switches or the like possibly also being provided in order to avoid overloading the motor.
  • a slip clutch in particular a magnetic coil coupling, can be connected between the motor and the driven sprocket, which stops the ram at a certain pressure and allows it to remain in this position.
  • the basic structure of the device shown in the figures consists of a shelf 1 constructed from profiles for a pallet 2 with a stack of goods 3 arranged thereon, onto which a shrink hood 4 is pulled, which in the shrunk state extends at least partially over the pallet 2.
  • a mast 5 extending in the vertical direction is arranged, from the upper end of which a support structure 6 extends up to the footprint 1, on which a support arm 7 is mounted, which can be pivoted about a vertical axis 8.
  • the support arm 7 carries at its free end a shrinking device 9 which, for example, can have a plurality of burners, not shown, arranged one above the other, in which hot gas is generated, which is blown against the shrink hood 4 when the shrinking device 9 is guided around the stack of goods 3.
  • the drive for the support arm 7, devices for gas supply and control devices can be accommodated in the mast 5.
  • the stack of goods 3 which may be made of compressible material, from taking up an undesirably high volume after shrinking, the stack of goods 3 is compressed before and during the shrinking.
  • an up and down movable plunger for compressing the stack of goods is connected to the mast 5.
  • U-shaped rails 10, 11 On the side of the mast facing the stack 3, two U-shaped rails 10, 11 are arranged, the U-legs of which are directed towards one another.
  • the distance between the rails 10, 11 corresponds essentially to the width of the mast 5.
  • upper and lower rollers 12 and 13 are respectively guided, which are connected to a support body 14 or the like for the press ram.
  • the distance between the upper and lower rollers 12 and 13 is so large that the ram is tilt-proof in the rails 10, 11.
  • a cantilever arm 15 adjoins the support body 14 and extends over the footprint 1.
  • the cantilever arm 15 carries a pressure plate 16 on its underside for loading the surface of the stack of goods 3.
  • the pressure plate 16 has a smaller area than the surface of the stack of goods. It is not shown that the pressure plate 16 can be detachably connected to the cantilever arm 15 in order to enable an adaptation to the size of the stack of goods to be processed by exchanging the pressure plate 16 for a larger or smaller one. It is also not shown that the pressure plate 16 can be connected to the cantilever arm 15 in an articulated, in particular cardanic manner, so that the pressure plate automatically adapts to any inclined or uneven surfaces of the stack of goods. Finally, the pressure plate 16 can also have openings, not shown, which allow the hot gases to access the surface of the stack of goods or the areas of the shrink hood present there.
  • the support body 14 of the pressure body is connected on one side to a strand of an endless chain 17, which in turn is guided via chain wheels 18, 19 at the upper and lower ends of the mast 5.
  • the lower sprocket 19 is driven by an electric motor 20 with the interposition of a slip clutch 21.
  • the slip clutch 21 is a magnetic coil clutch.
  • the electric motor 20 and the slip clutch 21 are arranged within the mast 5, as are associated control elements.
  • Limit switches 22 limit the path of the ram up or down.
  • Fig. 1 the press ram is shown with solid lines in an upper pressing position. In a lower position the ram is shown with dash-dotted lines.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Pile Receivers (AREA)

Abstract

1. A device for shrinking a shrinkage hood (4) drawn onto a stack of goods (3) comprising a support surface (1) for the stack of goods (3) and a mast (5) adjacent thereto, to which mast there is attached a shrinkage device (9) mounted for movement alongside the stack of goods (3) and operates with a hot gas, which device heats the stack of goods (3) on all sides, characterized in that the mast (5) comprises vertical guides (10, 11) for a press ram (14, 15, 16) which is mounted for reciprocal movement on the mast to effect the compression of the stack of goods (3) and in that the shrinkage device (9) is mounted such that it is movable around the stack of goods (3) and is mounted above the guides (10, 11) on a support arm (7) projecting from the upper end of the mast (5).

Description

Die Erfindung betrifft eine Vorrichtung zum Schrumpfen von auf einem Gutstapel gezogenen Schrumpfhauben, bestehend aus einer Stellfläche für den Gutstapel und einem daneben angeordneten Mast, an dem eine längs des Randes der Stellfläche bzw. um den Gutstapel herumführbare, mit einem Heißgas arbeitende Schrumpfeinrichtung angebracht ist.The invention relates to a device for shrinking shrink hoods drawn on a stack of goods, consisting of a storage space for the stack of goods and a mast arranged next to it, to which a shrinking device working with a hot gas and attached to the edge of the storage surface or around the stack of goods is attached.

Gutstapel die zum Schutz mit einer Schrumpfhaube umgeben sind, werden vor dem Schrumpfen der Schrumpfhaube gepreßt, um das Volumen des Gutstapels zu verringern und dadurch seine Stabilität zu verbessern. Das Pressen einerseits und das Schrumpfen andererseits erfolgt an unterschiedlichen Bearbeitungsstationen. Dementsprechend besitzt eine Vorrichtung zum Schrumpfen im allgemeinen den eingangs erläuterten grundsätzlichen Aufbau, vgl. FR-A-2 136 112. Nachteilig dabei ist, daß das Volumen des Gutstapels sich zwischen dem Pressen und dem Schrumpfen wieder vergrößert, weil das komprimierbare Material des Gutstapels sich ausdehnt. Hier will die Erfindung Abhilfe schaffen.Stacks of goods which are surrounded by a shrink hood for protection are pressed before the shrink hood shrinks in order to reduce the volume of the stack of goods and thereby improve its stability. The pressing on the one hand and the shrinking on the other hand takes place at different processing stations. Accordingly, a device for shrinking generally has the basic structure explained at the beginning, cf. FR-A-2 136 112. The disadvantage here is that the volume of the stack of goods increases again between pressing and shrinking, because the compressible material of the stack of goods expands. The invention seeks to remedy this.

Aufgabe der Erfindung ist es deshalb, die Größe eines mit einer Schrumpfhaube überzogenen Gutstapels aus kompressiblem Material zu reduzieren.The object of the invention is therefore to reduce the size of a stack of goods made of compressible material covered with a shrink hood.

Diese Aufgabe wird dadurch gelöst, daß der Mast vertikale Führungen für einen daran auf-und abbeweglichen Preßstempel zum Zusammendrücken des Gutstapels aufweist und daß die Schrumpfeinrichtung um den Gutstapel herumführbar sowie oberhalb der Führungen an einem vom oberen Ende des Mastes ausgehenden Tragarm gelagert ist.This object is achieved in that the mast has vertical guides for an up and down movable press ram for compressing the stack of goods and that the shrinking device can be guided around the stack of goods and is mounted above the guides on a support arm extending from the upper end of the mast.

Die erfindungsgemäße Vorrichtung ermöglicht das Pressen und Schrumpfen in einem einzigen Arbeitsgang. Dadurch wird nicht nur eine zusätzliche Bearbeitungsstation sondern auch Personal und Zeit gespart. Hinzu kommt, daß die mit der erfindungsgemäßen Vorrichtung bearbeiteten Gutstapel ein nach Maßgabe des aufgebrachten Preßdruckes geringstmögliches Volumen aufweisen, das sich auch nach der Bearbeitung nicht mehr vergrößert, weil die Schrumpfspannungen der Schrumpffolie ausreichen, um den Gutstapel in der endgültigen Form zu halten. Die erfindungsgemäße Vorrichtung ermöglicht aber auch den Einsatz kleinerer Schrumpfhauben und damit eine Materialersparnis, weil die verwendeten Schrumpfhauben nach Maßgabe des aufgebrachten Preßdruckes auf geringstmögliche Größe ausgelegt werden können.The device according to the invention enables pressing and shrinking in a single operation. This not only saves an additional processing station but also personnel and time. In addition, the stacks of goods processed with the device according to the invention have the smallest possible volume in accordance with the applied pressing pressure, which does not increase even after processing, because the shrinking stresses of the shrink film are sufficient to keep the stack of goods in the final shape. However, the device according to the invention also enables the use of smaller shrink hoods and thus material savings because the shrink hoods used can be designed for the smallest possible size in accordance with the applied pressing pressure.

Eine praktische Ausführungsform ist dadurch gekennzeichnet, daß der Preßstempel einen sich bis über die Stellfläche erstreckenden Kragarm mit einer daran gehaltenen Druckplatte zum Beaufschlagen der Oberseite des Gutstapels aufweist.A practical embodiment is characterized in that the press ram has a cantilever arm extending up to the footprint with a pressure plate held thereon for loading the top of the stack of goods.

Da der Preßstempel auch auf- und abbewegbar ist, können mit ihm auch Gutstapel unterschiedlicher Höhe zusammengepreßt werden. Der Preßdruck verteilt sich gleichmäßig über die Fläche der Druckplatte, so daß unerwünscht hohe Flächenpressungen nicht auftreten. Es versteht sich, daß die Fläche der Druckplatte der Fläche des Gutstapels angepaßt sein kann. Dazu kann die Druckplatte eine verstellbare Größe besitzen oder lösbar, d. h. auswechselbar an den Kragarm angeschlossen sein, so daß die Verwendung unterschiedlich großer Druckplatten möglich ist.Since the press ram can also be moved up and down, stacks of goods of different heights can also be pressed together. The pressure is distributed evenly over the surface of the pressure plate, so that undesirably high surface pressures do not occur. It is understood that the area of the pressure plate can be adapted to the area of the stack of goods. For this purpose, the pressure plate can have an adjustable size or can be detached, i.e. H. be exchangeably connected to the cantilever, so that the use of different sized printing plates is possible.

Grundsätzlich kann die Druckplatte eine geschlossene Druckfläche aufweisen. Günstiger ist allerdings eine Druckplatte mit Öffnungen für die Zuführung von Wärme zu der Schrumpffolie, weil dann die Schrumpfhaube auch an der Oberseite des Gutstapels geschrumpft wird. Zweckmäßig ordnet man die Druckplatte so am Kragarm an, daß sie sich auf die Oberfläche des Gutstapels einstellen kann. Dazu kann die Druckplatte einfach gelenkig oder auch kardanisch an den Kragarm angeschlossen sein.In principle, the printing plate can have a closed printing surface. However, a pressure plate with openings for supplying heat to the shrink film is more advantageous because the shrink hood is then also shrunk on the top of the stack of goods. It is useful to arrange the pressure plate on the cantilever so that it can adjust to the surface of the stack of goods. For this purpose, the pressure plate can be connected to the cantilever in a simply articulated or cardanic manner.

Die Führungen für den Preßstempel werden vorteilhaft an der der Stellfläche bzw. den darauf befindlichen Gutstapel zugewandten Seite des Mastes angeordnet. Eine einfache Ausführungsform ist dadurch gekennzeichnet, daß die Führungen aus U-förmigen Schienen bestehen, in denen der Preßstempel mit Gleitschuhen oder Rollen geführt und abgestützt ist.The guides for the press ram are advantageously arranged on the side of the mast facing the standing surface or the stack of goods located thereon. A simple embodiment is characterized in that the guides consist of U-shaped rails in which the press ram is guided and supported with slide shoes or rollers.

Um den Preßstempel anzutreiben kann dieser an ein Trum einer endlosen Kette angeschlossen sein, die im Bereich des oberen und unteren Endes des Mastes über Kettenräder geführt ist, von denen eines mit einem Motor, insbesondere E-Motor, antreibbar ist. Der Motor kann in geeigneter Weise gesteuert werden, wobei gegebenenfalls auch Endschalter od. dgl. vorgesehen sein können, um eine Überlastung des Motors zu vermeiden.In order to drive the press ram, it can be connected to a strand of an endless chain which is guided in the region of the upper and lower ends of the mast via chain wheels, one of which can be driven by a motor, in particular an electric motor. The motor can be controlled in a suitable manner, with limit switches or the like possibly also being provided in order to avoid overloading the motor.

Wenn es schwierig ist, den Preßdruck des Preßstempels durch Steuerung des Motors einzustellen, kann zwischen Motor und angetriebenem Kettenrad auch eine Rutschkupplung insbesondere eine Magnetspulkupplung, geschaltet sein, die den Preßstempel bei einem bestimmten Preßdruck anhält und ihn in dieser Position verharren läßt.If it is difficult to adjust the pressure of the ram by controlling the motor, a slip clutch, in particular a magnetic coil coupling, can be connected between the motor and the driven sprocket, which stops the ram at a certain pressure and allows it to remain in this position.

Im Folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert; es zeigt

  • Fig. 1 in schematischer Darstellung eine Seitenansicht einer Vorrichtung, mit der gleichzeitig ein Gutstapel zusammengepreßt und die auf dem Gutstapel befindliche Schrumpfhaube geschrumpft werden kann,
  • Fig. 2 in schematischer Darstellung und teilweise geschnitten eine Draufsicht auf den Gegenstand nach Fig. 1.
An exemplary embodiment of the invention illustrated in the drawing is explained below; it shows
  • 1 is a schematic representation of a side view of a device with which a stack of goods can be pressed together and the shrink hood located on the stack of goods can be shrunk,
  • 2 in a schematic representation and partially in section a top view of the object according to FIG. 1.

Die in den Figuren dargestellte Vorrichtung besteht in ihrem grundsätzlichen Aufbau aus einer aus Profilen aufgebauten Stellfläche 1 für eine Palette 2 mit darauf angeordnetem Gutstapel 3, auf den eine Schrumpfhaube 4 gezogen ist, die sich in geschrumpftem Zustand wenigstens teilweise bis über die Palette 2 erstreckt. Neben der Stellfläche 1 ist ein sich in vertikaler Richtung erstreckender Mast 5 angeordnet, von dessen oberen Ende eine sich bis über die Stellfläche 1 erstreckende Tragkonstruktion 6 ausgeht, an der ein Tragarm 7 gelagert ist, der angetrieben um eine vertikale Achse 8 schwenkbar ist. Der Tragarm 7 trägt an seinem freien Ende eine Schrumpfeinrichtung 9, die zum Beispiel mehrere übereinander angeordnete, nicht dargestellte Brenner aufweisen kann, in denen Heißgas erzeugt wird, welches gegen die Schrumpfhaube 4 geblasen wird, wenn die Schrumpfeinrichtung 9 um den Gutstapel 3 herumgeführt wird. Der Antrieb für den Tragarm 7, Einrichtungen für die Gasversorgung und Steuereinrichtungen können im Mast 5 untergebracht sein.The basic structure of the device shown in the figures consists of a shelf 1 constructed from profiles for a pallet 2 with a stack of goods 3 arranged thereon, onto which a shrink hood 4 is pulled, which in the shrunk state extends at least partially over the pallet 2. In addition to the footprint 1, a mast 5 extending in the vertical direction is arranged, from the upper end of which a support structure 6 extends up to the footprint 1, on which a support arm 7 is mounted, which can be pivoted about a vertical axis 8. The support arm 7 carries at its free end a shrinking device 9 which, for example, can have a plurality of burners, not shown, arranged one above the other, in which hot gas is generated, which is blown against the shrink hood 4 when the shrinking device 9 is guided around the stack of goods 3. The drive for the support arm 7, devices for gas supply and control devices can be accommodated in the mast 5.

Um zu vermeiden, daß der gegebenenfalls aus kompressiblem Material bestehende Gutstapel 3 nach dem Schrumpfen ein unerwünscht hohes Volumen einnimmt, wird der Gutstapel 3 vor und während des Schrumpfens zusammengepreßt. Dazu ist an den Mast 5 ein auf- und abbeweglicher Preßstempel zum Zusammendrücken des Gutstapels angeschlossen.In order to prevent the stack of goods 3, which may be made of compressible material, from taking up an undesirably high volume after shrinking, the stack of goods 3 is compressed before and during the shrinking. For this purpose, an up and down movable plunger for compressing the stack of goods is connected to the mast 5.

Auf der dem Gutstapel 3 zugewandten Seite des Mastes sind zwei U-förmige Schienen 10, 11 angeordnet, deren U-Schenkel aufeinander zu gerichtet sind. Der Abstand der Schienen 10, 11 entspricht im wesentlichen der Breite des Mastes 5. In den Schienen 10, 11 sind jeweils obere und untere Rollen 12 bzw. 13 geführt, die an einen Tragkörper 14 od. dgl. für den Preßstempel angeschlossen sind. Der Abstand der oberen und unteren Rollen 12 bzw. 13 ist so groß, daß der Preßstempel kippsicher in den Schienen 10, 11 geführt ist. An den Tragkörper 14 schließt sich ein Kragarm 15 an, welcher sich bis über die Stellfläche 1 erstreckt. Der Kragarm 15 trägt an seiner Unterseite eine Druckplatte 16 zum Beaufschlagen der Oberfläche des Gutstapels 3.On the side of the mast facing the stack 3, two U-shaped rails 10, 11 are arranged, the U-legs of which are directed towards one another. The distance between the rails 10, 11 corresponds essentially to the width of the mast 5. In the rails 10, 11, upper and lower rollers 12 and 13 are respectively guided, which are connected to a support body 14 or the like for the press ram. The distance between the upper and lower rollers 12 and 13 is so large that the ram is tilt-proof in the rails 10, 11. A cantilever arm 15 adjoins the support body 14 and extends over the footprint 1. The cantilever arm 15 carries a pressure plate 16 on its underside for loading the surface of the stack of goods 3.

Bei dem in Fig. 2 dargestellten Ausführungsbeispiel besitzt die Druckplatte 16 eine geringere Fläche als die Oberfläche des Gutstapels. Nicht dargestellt ist, daß die Druckplatte 16 lösbar an den Kragarm 15 angeschlossen sein kann, um durch Auswechseln der Druckplatte 16 gegen eine größere oder kleinere eine Anpassung an die Größe des jeweils zu bearbeitenden Gutstapels zu ermöglichen. Ebenfalls nicht dargestellt ist, daß die Druckplatte 16 gelenkig, insbesondere kardanisch an den Kragarm 15 angeschlossen sein kann, damit die Druckplatte sich an gegebenenfalls schräge oder unebene Oberflächen des Gutstapels selbsttätig anpaßt. Schließlich kann die Druckplatte 16 auch nicht dargestellte Öffnungen aufweisen, die den Zutritt der Heißgase zur Oberfläche des Gutstapels bzw. zu den dort vorhandenen Bereichen der Schrumpfhaube ermöglichen.In the embodiment shown in FIG. 2, the pressure plate 16 has a smaller area than the surface of the stack of goods. It is not shown that the pressure plate 16 can be detachably connected to the cantilever arm 15 in order to enable an adaptation to the size of the stack of goods to be processed by exchanging the pressure plate 16 for a larger or smaller one. It is also not shown that the pressure plate 16 can be connected to the cantilever arm 15 in an articulated, in particular cardanic manner, so that the pressure plate automatically adapts to any inclined or uneven surfaces of the stack of goods. Finally, the pressure plate 16 can also have openings, not shown, which allow the hot gases to access the surface of the stack of goods or the areas of the shrink hood present there.

Der Tragkörper 14 des Druckkörpers ist einseitig an ein Trum einer endlos umlaufenden Kette 17 angeschlossen, die ihrerseits über Kettenräder 18,19 am oberen bzw. unteren Ende des Mastes 5 geführt ist. Das untere Kettenrad 19 wird von einem E-Motor 20 unter Zwischenschaltung einer Rutschkupplung 21 angetrieben. Die Rutschkupplung 21 ist eine Magnetspulkupplung. Der E-Motor 20 und die Rutschkupplung 21 sind ebenso wie zugeordnete Steuerelemente innerhalb des Mastes 5 angeordnet. Endschalter 22 begrenzen den Weg des Preßstempels nach oben bzw. unten.The support body 14 of the pressure body is connected on one side to a strand of an endless chain 17, which in turn is guided via chain wheels 18, 19 at the upper and lower ends of the mast 5. The lower sprocket 19 is driven by an electric motor 20 with the interposition of a slip clutch 21. The slip clutch 21 is a magnetic coil clutch. The electric motor 20 and the slip clutch 21 are arranged within the mast 5, as are associated control elements. Limit switches 22 limit the path of the ram up or down.

In Fig. 1 ist der Preßstempel mit durchgezogenen Linien in einer oberen Preßstellung dargestellt. In einer unteren Stellung ist der Preßstempel mit strichpunktierten Linien wiedergegeben.In Fig. 1 the press ram is shown with solid lines in an upper pressing position. In a lower position the ram is shown with dash-dotted lines.

Die dargestellte Vorrichtung arbeitet wie folgt:

  • Eine Palette 2 mit darauf befindlichem Gutstapel, über den eine Schrumpfhaube 4 gezogen ist, wird auf die Stellfläche 1 gebracht. Dann wird durch Betätigen des E-Motors 20 der Kragarm 15 mit der Druckplatte 16 auf die Oberseite des Gutstapels 3 abgesenkt und wird nach Maßgabe der Einstellung der Rutschkupplung 21 eine entsprechende Preßkraft auf den Gutstapel aufgebracht. Dann wird der Antrieb für den Tragarm 7 eingeschaltet und werden die Brenner der Schrumpfeinrichtung 9 gezündet. Während die Schrumpfeinrichtung 9 um den Gutstapel 3 herumgeführt wird, wird die Schrumpfhaube 4 unter Aufrechterhaltung des Preßdrucks geschrumpft. Anschließend wird der Preßstempel wieder abgehoben und die Palette 2 mit dem Gutstapel 3 kann weitertransportiert werden.
The device shown works as follows:
  • A pallet 2 with a stack of goods thereon, over which a shrink hood 4 is pulled, is brought onto the storage space 1. Then, by actuating the electric motor 20, the cantilever arm 15 with the pressure plate 16 is lowered onto the top of the stack of goods 3 and a corresponding pressing force is applied to the stack of goods in accordance with the setting of the slip clutch 21. Then the drive for the support arm 7 is switched on and the burners of the shrinking device 9 are ignited. While the shrinking device 9 is guided around the stack of goods 3, the shrink hood 4 is shrunk while maintaining the pressing pressure. The press ram is then lifted off again and the pallet 2 with the stack of goods 3 can be transported further.

Claims (12)

1. A device for shrinking a shrinkage hood (4) drawn onto a stack of goods (3) comprising a support surface (1) for the stack of goods (3) and a mast (5) adjacent thereto, to which mast there is attached a shrinkage device (9) mounted for movement alongside the stack of goods (3) and operates with a hot gas, which device heats the stack of goods (3) on all sides, characterised in that the mast (5) comprises vertical guides (10, 11) for a press ram (14, 15, 16) which is mounted for reciprocal movement on the mast to effect the compression of the stack of goods (3) and in that the shrinkage device (9) is mounted such that it is movable around the stack of goods (3) and is mounted above the guides (10, 11) on a support arm (7) projecting from the upper end of the mast (5).
2. A device as claimed inclaim 1, characterised in that the ram comprises a bracket arm (15) extending over the goods support surface (1) with a pressure plate (16) fastened thereon for acting upon the upper surface of the stack of goods.
3. A device as claimed in claim 2, characterised in that the pressure plate (16) has a closed pressure surface.
4. A device as claimed in claim 2 or 3, characterised in that the pressure plate (16) has apertures for the supply of heat to the shrink-on film.
5. A device as claimed in any one of claims 2 to 4, characterised in that the size of the pressure plate (16) is adjustable.
6. A device as claimed in any one of claims 2 to 5, characterised in that the pressure plate (16) is connected to the bracket arm (15) in a simple articulated manner or by means of a universal joint.
7. A device as claimed in any one of claims 2 to 6, characterised in that the pressure plate (16) is connected to the bracket arm (15) in a detachable manner.
8. A device as claimed in any one of claims 1 to 7, characterised in that the guides (10,11) for the press ram are disposed on the side of the mast (5) facing the support surface (1) and the stack of goods disposed thereon.
9. A device as claimed in any one of claims 1 to 8, characterised in that the guides are constituted by U-shaped rails (10, 11) in which the press ram (14) is guided and supported via guide shoes or rollers (12,13)..
10. A device as claimed 'n any one of claims 1 to 9, characterised in that the press ram (14) is connected to a stringer of an endless chain (17) which is guided in the region of the upper and lower end of the mast (5) on chain wheels (18,19) one of which is driven by a motor (20).
11. A device as claimed in claim 10, characterised in that a slipping clutch (21) is provided between the motor (20) and the driven chain wheel (19).
12. A device as claimed in claim 11, characterised in that the slipping clutch (21) is a solenoid clutch.
EP80107509A 1979-12-07 1980-12-02 Device for shrinking shrinkable wrappings drawn over a stack of produce Expired EP0030346B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107509T ATE5807T1 (en) 1979-12-07 1980-12-02 DEVICE FOR SHRINKING HOODS DRAWN ON A STACK OF GOODS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2949242 1979-12-07
DE19792949242 DE2949242A1 (en) 1979-12-07 1979-12-07 DEVICE FOR SHRINKING SHRINK HOODS DRAWN ON A STACK OF GOODS

Publications (2)

Publication Number Publication Date
EP0030346A1 EP0030346A1 (en) 1981-06-17
EP0030346B1 true EP0030346B1 (en) 1984-01-11

Family

ID=6087826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107509A Expired EP0030346B1 (en) 1979-12-07 1980-12-02 Device for shrinking shrinkable wrappings drawn over a stack of produce

Country Status (3)

Country Link
EP (1) EP0030346B1 (en)
AT (1) ATE5807T1 (en)
DE (2) DE2949242A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510515B1 (en) * 1981-07-31 1985-12-06 Saint Gobain Isover PROCESS FOR PACKAGING PANELS OF COMPRESSIBLE MATERIAL AND PACKAGING PRODUCED BY THIS PROCESS

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662512A (en) * 1968-01-24 1972-05-16 Weldotron Corp Method and apparatus for shrink-film wrapping a pallet load
US3930790A (en) * 1971-04-08 1976-01-06 Ethyl Corporation Method and apparatus for shrinking plastic film over grouped articles
FR2153779A5 (en) * 1971-09-17 1973-05-04 Sat
FR2181141A5 (en) * 1972-04-18 1973-11-30 Lucas Jean Louis
DE2550036A1 (en) * 1975-11-07 1977-05-18 Kleve Masch & Stahlbau SHRINKING DEVICE
DE2802354A1 (en) * 1978-01-20 1979-07-26 Msk Verpackung Syst Gmbh SHRINKING DEVICE FOR SHRINKING IN PARTICULAR GOODS

Also Published As

Publication number Publication date
DE3066111D1 (en) 1984-02-16
ATE5807T1 (en) 1984-01-15
EP0030346A1 (en) 1981-06-17
DE2949242A1 (en) 1981-06-11

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