EP0461461A1 - Device for packing a stack of objects by means of a stretchfoil hood - Google Patents

Device for packing a stack of objects by means of a stretchfoil hood Download PDF

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Publication number
EP0461461A1
EP0461461A1 EP91108657A EP91108657A EP0461461A1 EP 0461461 A1 EP0461461 A1 EP 0461461A1 EP 91108657 A EP91108657 A EP 91108657A EP 91108657 A EP91108657 A EP 91108657A EP 0461461 A1 EP0461461 A1 EP 0461461A1
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EP
European Patent Office
Prior art keywords
hood
stack
film tube
goods
film
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Granted
Application number
EP91108657A
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German (de)
French (fr)
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EP0461461B1 (en
Inventor
Reiner W. Hannen
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Develog Reiner Hannen and Cie
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Develog Reiner Hannen and Cie
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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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/13—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state
    • B65B9/135—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state for palletised loads

Definitions

  • the invention relates to a method for packaging a stack of goods with a stretch film hood, wherein a tube section which has been pulled off a film tube wrap, is closed at the head with a weld seam and is open on the foot side is cut off from the film tube and the resulting stretch film hood is opened, gathered in the longitudinal direction of the hood and stretched in the transverse direction of the hood and then over the stack of goods is drawn.
  • the invention also relates to a device for carrying out the method with guides for the film tube, a welded connection for the head weld, a separating device for cutting off the stretch film hood from the film tube, a device for gathering, tensioning and pulling the stretch film hood over the stack of goods.
  • a stack of goods is packed with a stretch film hood similar to the packaging of a stack of goods with a shrink film hood, with the proviso that the stretch film hood wraps itself around the stack of goods with its own tension and therefore does not need to be shrunk.
  • a section is pulled off a film tube holder and cut off from the film tube with a separating weld, the head weld seam being turned at the same time.
  • the hood thus formed is then opened and pulled over the stack of goods in the manner described.
  • the separation welding with simultaneous formation of the head weld seam is usually carried out at the end of the gathering process and immediately before the stretch film hood is stretched in the cross direction of the hood. If the head welding seam is also particularly stressed by the tensioning process, it is necessary to let the head welding seam cool down before the tensioning process begins. This reduces the performance when packing stacks of goods.
  • the object of the invention is to accelerate the packaging of stacks of goods in stretch film hoods. In particular, more time should be available to cool the head weld.
  • This object is achieved in that the head welding seam of the following stretch film hood is placed on the film tube, while the respective preceding stretch film hood is stretched and pulled over the stack of goods. This leaves enough time for the head weld to cool down on the following stretch film hood.
  • this head weld seam has cooled so far, that it can withstand the stresses. As a result, the packing of the stacks of goods is accelerated.
  • the head weld (the preceding stretch film hood) is then placed at a distance corresponding to the hood length from the free end of the film tube.
  • hood lengths are also the option of adapting the hood lengths to the heights of the successive stacks of goods if the height of the following stack of goods is measured and the required hood length is determined therefrom and if the head weld seam is placed at a distance corresponding to this hood length from the free end of the film tube.
  • a welding device adjustable in the longitudinal direction of the film is used.
  • a device suitable for carrying out the described method is characterized in that the welding device is arranged in front of the separating device at a distance of a hood length and in the transport direction of the film tube.
  • the formation of the head weld seam and the separation of the stretch film hood from the film tube are carried out independently of one another and in time, so that the advantages already described result.
  • the welding device can be adjustable in the longitudinal direction of the film tube so that it is possible to produce stretch film hoods with different hood lengths from the film tube. An adjustment to the required hood length Successive stacks of goods to be packaged are possible if the welding device has an actuating drive which can be controlled by a height measuring device arranged in the random area of the following stack of goods.
  • the welding device is arranged on a carriage which can be moved along the film tube. It is advisable to arrange the carriage in an area of horizontal guidance of the film tube.
  • a fixed and a movable sealing jaw are arranged on the carriage and the film tube extends between the two sealing jaws.
  • the device shown in the drawing first includes a frame 1, which is arranged above a conveyor 2, on which stacks of goods 3, only one of which is shown, are successively fed to the device.
  • a separating device 4 is arranged in a fixed position and a device 5 for gathering, tensioning and pulling a stretch film hood over the stack of goods 3 guided up and down.
  • This device 5 is held on a carriage 6 which can be moved up and down on a mast 7 arranged next to the frame 1.
  • a carriage (not shown) belongs to the carriage 6.
  • a film tube 9 is first pulled off essentially vertically upwards and then horizontally via a deflection roller 10 to a deflection roller 11, which is located above a take-off device with a motor 12 and associated take-off rollers 13.
  • the take-off rollers 13 are located above the separating device 4.
  • guide rails 14 for a carriage 15 guided thereon are laid in the transport direction of the film tube 9.
  • the carriage has an actuator (not shown) and can be moved back and forth in the direction of the double arrow 16.
  • An upper, fixed welding jaw 17 and a lower, movable welding jaw 18 are arranged on the carriage 15.
  • the lower welding jaw 18 has a drive, not shown, with which it can be moved against the upper welding jaw 17.
  • the film tube 9 extends between the two welding jaws 17, 18.
  • the carriage 15 is moved into such a position that the length of the film tube 9 between the welding jaws 17, 18 and the separating device 4 corresponds to the length of the stretch film hood to be cut by the film tube 9.
  • the parts of the tensioning frame 23 are then moved towards one another so that the edge sections of the film tube held by the grippers 20 are pulled over the outside of the tensioning frame 22.
  • the stenter and its slide 6 can be slightly lowered.
  • gathering rollers 25 are fed against the outer sides of the tenter frame 23.
  • the gathering rollers 25 are driven and pull the film material over the outside of the tenter frame 23, the film material being gathered in the longitudinal direction.
  • the parts of the tenter frame 23 are then moved apart and the stretch film hood is stretched in the circumferential direction. At the same time, the top of the stretch film hood is stretched with the cooled head weld.
  • the device 5 is then lowered over the stack of goods 3, the stretch film hood pulling away from the device 5 and laying tightly around the stack of goods 3.
  • the head weld seam for the next stretch film hood is already attached to the film tube.
  • a height measuring device (not shown) can be arranged in the feed area of the stacks of goods 3, which measures the height of the following stack of goods to be packaged, the required hood length being determined from the measured value and then the carriage 15 is adjusted with the welding jaws 17, 18.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

The invention relates to a method for packaging a stack of objects by means of a stretchfilm hood, in which a length of tubular film closed at the top with a welding seam and open at the bottom is drawn from a roll and cut off, the resulting stretchfilm hood is opened, gathered in the longitudinal direction of the hood and stretched in the transverse direction of the hood and then pulled over the stack of objects. The invention also relates to a device for carrying out the method. In order to accelerate the packaging of stacks of objects in stretchfilm hoods and in particular make more time available for cooling the top welding seam, it is intended that the top welding seam of the following stretchfilm hood in each case be made on the tubular film while the preceding stretchfilm hood in each case is stretched and pulled over the stack of objects. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Verpacken eines Gutstapels mit einer Stretchfolienhaube, wobei ein von einem Folienschlauchwickel abgezogener, kopfseitig mit einer Schweißnaht geschlossener und fußseitig offener Schlauchabschnitt vom Folienschlauch abgeschnitten wird sowie die so entstandene Stretchfolienhaube geöffnet, in Haubenlängsrichtung gerafft und in Haubenquerrichtung gespannt sowie dann über den Gutstapel gezogen wird. Die Erfindung betrifft auch eine Vorrichtung zur Durchführung des Verfahrens mit Führungen für den Folienschlauch, einer Schweißverbindung für die Kopfschweißnaht, einer Trenneinrichtung zum Abschneiden der Stretchfolienhaube vom Folienschlauch, einer Einrichtung zum Raffen, Spannen und Ziehen der Stretchfolienhaube über den Gutstapel.The invention relates to a method for packaging a stack of goods with a stretch film hood, wherein a tube section which has been pulled off a film tube wrap, is closed at the head with a weld seam and is open on the foot side is cut off from the film tube and the resulting stretch film hood is opened, gathered in the longitudinal direction of the hood and stretched in the transverse direction of the hood and then over the stack of goods is drawn. The invention also relates to a device for carrying out the method with guides for the film tube, a welded connection for the head weld, a separating device for cutting off the stretch film hood from the film tube, a device for gathering, tensioning and pulling the stretch film hood over the stack of goods.

In der Praxis erfolgt das Verpacken eines Gutstapels mit einer Stretchfolienhaube ähnlich wie das Verpacken eines Gutstapels mit einer Schrumpffolienhaube, mit der Maßgabe, daß die Stretchfolienhaube sich mit Eigenspannung um den Gutstapel legt und deshalb nicht geschrumpft zu werden braucht. Zur Herstellung der Haube wird von einem Folienschlauchnehmer ein Abschnitt abgezogen und mit einer Trennschweißung vom Folienschlauch abgeschnitten, wobei gleichzeitig die Kopfschweißnaht gewendet wird. Die so gebildete Haube wird dann geöffnet und in der beschriebenen Weise über den Gutstapel gezogen. Beim Verpacken mit Stretchfolienhauben erfolgt die Trennschweißung mit gleichzeitiger Bildung der Kopfschweißnaht in der Regel am Ende des Raffvorganges und unmittelbar bevor die Stretchfolienhaube in Haubenquerrichtung gespannt wird. Sofern durch den Spannvorgang auch die Kopfschweißnaht besonders belastet wird, ist es erforderlich, die Kopfschweißnaht zunächst abkühlen zu lassen, bevor der Spannvorgang einsetzt. Das mindert die Leistung beim Verpacken von Gutstapeln.In practice, a stack of goods is packed with a stretch film hood similar to the packaging of a stack of goods with a shrink film hood, with the proviso that the stretch film hood wraps itself around the stack of goods with its own tension and therefore does not need to be shrunk. To produce the hood, a section is pulled off a film tube holder and cut off from the film tube with a separating weld, the head weld seam being turned at the same time. The hood thus formed is then opened and pulled over the stack of goods in the manner described. When packaging with stretch film hoods, the separation welding with simultaneous formation of the head weld seam is usually carried out at the end of the gathering process and immediately before the stretch film hood is stretched in the cross direction of the hood. If the head welding seam is also particularly stressed by the tensioning process, it is necessary to let the head welding seam cool down before the tensioning process begins. This reduces the performance when packing stacks of goods.

Aufgabe der Erfindung ist es, das Verpacken von Gutstapeln in Stretchfolienhauben zu beschleunigen. Insbesondere soll mehr Zeit zum Abkühlen der Kopfschweißnaht zur Verfügung stehen.The object of the invention is to accelerate the packaging of stacks of goods in stretch film hoods. In particular, more time should be available to cool the head weld.

Diese Aufgabe wird dadurch gelöst, daß die Kopfschweißnaht der jeweils folgenden Stretchfolienhaube am Folienschlauch gelegt wird, während die jeweils vorangehende Stretchfolienhaube gespannt und über den Gutstapel gezogen wird. Damit steht genügend Zeit für das Abkühlen der Kopfschweißnaht an der jeweils folgenden Stretchfolienhaube zur Verfügung. Wenn der vorangehende Gutstapel verpackt ist und die folgende Stretchfolienhaube gerafft, gespannt und über den folgenden Gutstapel gezogen wird, ist diese Kopfschweißnaht soweit abgekühlt, daß sie den Belastungen standhält. Im Ergebnis wird dadurch das Verpacken der Gutstapel beschleunigt.This object is achieved in that the head welding seam of the following stretch film hood is placed on the film tube, while the respective preceding stretch film hood is stretched and pulled over the stack of goods. This leaves enough time for the head weld to cool down on the following stretch film hood. When the previous stack of goods is packaged and the following stretch film hood is gathered, stretched and pulled over the following stack of goods, this head weld seam has cooled so far, that it can withstand the stresses. As a result, the packing of the stacks of goods is accelerated.

Nach dem Abschneiden der jeweils vorangehenden Stretchfolienhaube wird dann die Kopfschweißnaht (der vorangehenden Stretchfolienhaube) in einem der Haubenlänge entsprechenden Abstand vom freien Ende des Folienschlauchs gelegt.After cutting off the preceding stretch film hood, the head weld (the preceding stretch film hood) is then placed at a distance corresponding to the hood length from the free end of the film tube.

Es besteht auch die Möglichkeit, die Haubenlängen den Höhen der jeweils aufeinanderfolgenden Gutstapel anzupassen, wenn die Höhe des jeweils folgenden Gutstapels gemessen und daraus die erforderliche Haubenlänge bestimmt wird und wenn die Kopfschweißnaht in einem dieser Haubenlänge entsprechenden Abstand von dem freien Ende des Folienschlauchs gelegt wird. Dazu wird mit einer in Folienlängsrichtung verstellbaren Schweißeinrichtung gearbeitet.There is also the option of adapting the hood lengths to the heights of the successive stacks of goods if the height of the following stack of goods is measured and the required hood length is determined therefrom and if the head weld seam is placed at a distance corresponding to this hood length from the free end of the film tube. For this purpose, a welding device adjustable in the longitudinal direction of the film is used.

Eine zur Durchführung des beschriebenen Verfahrens geeignete Vorrichtung ist dadurch gekennzeichnet, daß die Schweißeinrichtung im Abstand einer Haubenlänge und in Transportrichtung des Folienschlauches vor der Trenneinrichtung angeordnet ist. Anders als bei der Kopfschweißnahtbildung mit Hilfe einer herkömmlichen Trennschweißeinrichtung werden erfindungsgemäß die Bildung der Kopfschweißnaht und die Trennung der Stretchfolienhaube vom Folienschlauch unabhängig voneinander und zeitlich nacheinander durchgeführt, so daß sich die schon beschriebenen Vorteile ergeben.A device suitable for carrying out the described method is characterized in that the welding device is arranged in front of the separating device at a distance of a hood length and in the transport direction of the film tube. In contrast to the formation of head weld seams with the aid of a conventional separating welding device, the formation of the head weld seam and the separation of the stretch film hood from the film tube are carried out independently of one another and in time, so that the advantages already described result.

Die Schweißeinrichtung kann in Längsrichtung des Folienschlauches verstellbar sein, so daß die Möglichkeit besteht, aus dem Folienschlauch Stretchfolienhauben mit unterschiedlichen Haubenlängen herzustellen. Eine Anpassung der jeweils erforderlichen Haubenlänge an aufeinanderfolgende Gutstapel, die verpackt werden sollen, ist dann möglich, wenn die Schweißeinrichtung einen Stelltrieb aufweist, der von einer im Zufallbereich des jeweils folgenden Gutstapels angeordneten Höhenmeßeinrichtung steuerbar ist.The welding device can be adjustable in the longitudinal direction of the film tube so that it is possible to produce stretch film hoods with different hood lengths from the film tube. An adjustment to the required hood length Successive stacks of goods to be packaged are possible if the welding device has an actuating drive which can be controlled by a height measuring device arranged in the random area of the following stack of goods.

Bei einer bevorzugten Ausführung der Erfindung ist die Schweißeinrichtung auf einem längs des Folienschlauches verfahrbaren Wagen angeordnet. Es bietet sich an, den Wagen in einem Bereich horizontaler Führung des Folienschlauches anzuordnen. Auf dem Wagen sind eine feste und eine bewegliche Schweißbacke angeordnet und der Folienschlauch erstreckt sich zwischen den beiden Schweißbacken.In a preferred embodiment of the invention, the welding device is arranged on a carriage which can be moved along the film tube. It is advisable to arrange the carriage in an area of horizontal guidance of the film tube. A fixed and a movable sealing jaw are arranged on the carriage and the film tube extends between the two sealing jaws.

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

Fig. 1
schematisch eine Seitenansicht einer Vorrichtung zum Verpacken von Gutstapeln mit Stretchfolienhauben,
Fig. 2
teilweise den Gegenstand nach Fig. 1 in vergrößerter Darstellung,
Fig. 3
den Gegenstand nach Fig. 2 in anderer Funktionsstellung.
In the following an embodiment of the invention shown in the drawing is explained; show it:
Fig. 1
schematically a side view of a device for packaging stacks of goods with stretch film hoods,
Fig. 2
partially the object of FIG. 1 in an enlarged view,
Fig. 3
2 in a different functional position.

Zu der in der Zeichnung dargestellten Vorrichtung gehört zunächst ein Gestell 1, welches über einem Förderer 2 angeordnet ist, auf dem hintereinander Gutstapel 3, von denen nur einer dargestellt ist, der Vorrichtung zugeführt werden.The device shown in the drawing first includes a frame 1, which is arranged above a conveyor 2, on which stacks of goods 3, only one of which is shown, are successively fed to the device.

Am Gestell 1 ist eine Trenneinrichtung 4 ortfest angeordnet und eine Einrichtung 5 zum Raffen, Spannen und Überziehen einer Stretchfolienhaube über den Gutstapel 3 auf- und niederbeweglich geführt. Diese Einrichtung 5 ist an einem Schlitten 6 gehalten, der an einem neben dem Gestell 1 angeordneten Mast 7 auf- und niederbeweglich ist. Zum Schlitten 6 gehört ein nicht dargestellter Antrieb.On the frame 1, a separating device 4 is arranged in a fixed position and a device 5 for gathering, tensioning and pulling a stretch film hood over the stack of goods 3 guided up and down. This device 5 is held on a carriage 6 which can be moved up and down on a mast 7 arranged next to the frame 1. A carriage (not shown) belongs to the carriage 6.

Von einem neben dem Mast 7 angeordneten Folienschlauchwickel 8 wird ein Folienschlauch 9 zunächst im wesentlichen vertikal nach oben abgezogen und dann über eine Umlenkrolle 10 horizontal weitergeführt bis zu einer Umlenkrolle 11, die sich oberhalb einer Abzugseinrichtung mit einem Motor 12 und zugeordneten Abzugsrollen 13 befindet. Die Abzugsrollen 13 befinden sich oberhalb der Trenneinrichtung 4.From a film tube winding 8 arranged next to the mast 7, a film tube 9 is first pulled off essentially vertically upwards and then horizontally via a deflection roller 10 to a deflection roller 11, which is located above a take-off device with a motor 12 and associated take-off rollers 13. The take-off rollers 13 are located above the separating device 4.

Im Bereich des horizontalen Führungsabschnittes des Folienschlauches 9 zwischen den Umlenkrollen 10, 11 sind in Transportrichtung des Folienschlauches 9 verlaufende Führungsschienen 14 für einen darauf geführten Wagen 15 verlegt. Der Wagen besitzt einen nicht gezeichneten Stelltrieb und kann in Richtung des Doppelpfeils 16 hin- und herbewegt werden. Auf dem Wagen 15 sind eine obere, feste Schweißbacke 17 und eine untere, bewegliche Schweißbacke 18 angeordnet. Die untere Schweißbacke 18 besitzt einen nicht dargestellten Antrieb, mit dem sie gegen die obere Schweißbacke 17 bewegt werden kann. Zwischen den beiden Schweißbacken 17, 18 erstreckt sich der Folienschlauch 9.In the region of the horizontal guide section of the film tube 9 between the deflection rollers 10, 11, guide rails 14 for a carriage 15 guided thereon are laid in the transport direction of the film tube 9. The carriage has an actuator (not shown) and can be moved back and forth in the direction of the double arrow 16. An upper, fixed welding jaw 17 and a lower, movable welding jaw 18 are arranged on the carriage 15. The lower welding jaw 18 has a drive, not shown, with which it can be moved against the upper welding jaw 17. The film tube 9 extends between the two welding jaws 17, 18.

Der Wagen 15 wird in eine solche Position bewegt, daß die Länge des Folienschlauches 9 zwischen den Schweißbacken 17, 18 und der Trenneinrichtung 4 der Länge der von dem Folienschlauch 9 anzuschneidenden Stretchfolienhaube entspricht.The carriage 15 is moved into such a position that the length of the film tube 9 between the welding jaws 17, 18 and the separating device 4 corresponds to the length of the stretch film hood to be cut by the film tube 9.

Während die vorangehende Stretchfolienhaube, wie weiter unten beschrieben wird, mit der Einrichtung 5 gerafft, gespannt und über den Gutstapel 3 gezogen wird, wird mit Hilfe der Schweißbacken 17, 18 am Folienschlauch 9 eine Kopfschweißnaht für die folgende Stretchfolienhaube gelegt. Diese Kopfschweißnaht kann sich abkühlen, bis die vorangehende Stretchfolienhaube auf den Gutstapel aufgezogen worden ist und der nächste Gutstapel mit dem Förderer 2 unter die Einrichtung 5 gebracht worden ist. Dann wird das freie Ende des Folienschlauches, 9, welches sich im Bereich der Trenneinrichtung 4 befindet, etwas vorgezogen, so daß über die Unterseite der Trenneinrichtung 4 vorsteht. Mit der Trenneinrichtung 4 verbundene Sauger 19 greifen beidseits am Ende des Folienschlauches 9 an und öffnen diesen, so daß die freien Ränder des Folienschlauches dann von Greifern 20 erfaßt werden können, die an den Enden von Schwenkarmen 21 angeordnet sind. Die bei 22 gelagerten Schwenkarme 21 bzw. deren Greifer 20 ziehen den geöffneten Rand des Folienschlauches über die Unterseite des mehrteiligen Spannrahmens 23, dessen Teile in Richtung der Doppelpfeile 24 aufeinander zu- bzw. voneinander wegbewegt werden können. Die Teile des Spannrahmens 23 werden dann aufeinander zubewegt, so daß die von den Greifern 20 gehaltenen Randabschnitte des Folienschlauches über die Außenseite des Spannrahmens 22 gezogen werden. Dabei kann der Spannrahmen und sein Schlitten 6 etwas abgesenkt werden. Dann werden Raffrollen 25 gegen die Außenseiten des Spannrahmens 23 zugestellt. Die Raffrollen 25 sind angetrieben und ziehen das Folienmaterial über die Außenseite des Spannrahmens 23, wobei das Folienmaterial in Längsrichtung gerafft wird.While the preceding stretch film hood, as will be described further below, is gathered, tensioned and pulled over the stack of goods 3 by means of the device 5, a head weld seam is placed on the film tube 9 with the aid of the welding jaws 17, 18 for the following stretch film hood. This head weld seam can cool down until the preceding stretch film hood has been pulled onto the stack of goods and the next stack of goods with the conveyor 2 has been brought under the device 5. Then the free end of the film tube 9, which is located in the area of the separating device 4, is slightly advanced so that it protrudes beyond the underside of the separating device 4. Suction devices 19 connected to the separating device 4 engage on both sides at the end of the film tube 9 and open it, so that the free edges of the film tube can then be gripped by grippers 20 which are arranged at the ends of pivot arms 21. The pivot arms 21 mounted at 22 or their grippers 20 pull the open edge of the film tube over the underside of the multi-part clamping frame 23, the parts of which can be moved towards or away from one another in the direction of the double arrows 24. The parts of the tensioning frame 23 are then moved towards one another so that the edge sections of the film tube held by the grippers 20 are pulled over the outside of the tensioning frame 22. The stenter and its slide 6 can be slightly lowered. Then gathering rollers 25 are fed against the outer sides of the tenter frame 23. The gathering rollers 25 are driven and pull the film material over the outside of the tenter frame 23, the film material being gathered in the longitudinal direction.

Wenn die inzwischen angekühlte Kopfschweißnaht in den Bereich der Trenneinrichtung 4 gelangt, wird mit einem Messer 26, welches sich im Bereich eines der Sauger 19 befindet, oberhalb der Kopfschweißnaht ein Schnitt gelegt, wodurch die Stretchfolienhaube vom Folienschlauch 9 abgetrennt ist. Das Raffen wird dann vervollständigt.If the now cooled head weld reaches the area of the separating device 4, then a knife 26, which is located in the area of one of the suction cups 19, made a cut above the head weld seam, as a result of which the stretch film hood is separated from the film tube 9. The gathering is then completed.

Anschließend werden die Teile des Spannrahmens 23 auseinanderbewegt und dabei wird die Stretchfolienhaube in Umfangsrichtung gespannt. Gleichzeitig wird auch die Oberseite der Stretchfolienhaube mit der abgekühlten Kopfschweißnaht gespannt. Die Einrichtung 5 wird dann über den Gutstapel 3 abgesenkt, wobei sich die Stretchfolienhaube von der Einrichtung 5 abzieht und eng um den Gutstapel 3 legt.The parts of the tenter frame 23 are then moved apart and the stretch film hood is stretched in the circumferential direction. At the same time, the top of the stretch film hood is stretched with the cooled head weld. The device 5 is then lowered over the stack of goods 3, the stretch film hood pulling away from the device 5 and laying tightly around the stack of goods 3.

Nachdem die Stretchfolienhaube vom Folienschlauch abgetrennt worden ist, wird bereits die Kopfschweißnaht für die nächste Stretchfolienhaube am Folienschlauch angebracht.After the stretch film hood has been separated from the film tube, the head weld seam for the next stretch film hood is already attached to the film tube.

Wenn die auf dem Förderer 2 herangeführten Gutstapel unterschiedliche Höhe besitzen, kann im Zuführbereich der Gutstapel 3 eine nicht dargestellte Höhenmeßeinrichtung angeordnet werden, die die Höhe des jeweils folgenden, zu verpackenden Gutstapels mißt, wobei aus dem Meßwert die erforderliche Haubenlänge bestimmt wird und danach der Wagen 15 mit den Schweißbacken 17, 18 verstellt wird.If the stacks of goods brought up on the conveyor 2 have different heights, a height measuring device (not shown) can be arranged in the feed area of the stacks of goods 3, which measures the height of the following stack of goods to be packaged, the required hood length being determined from the measured value and then the carriage 15 is adjusted with the welding jaws 17, 18.

Claims (8)

Verfahren zum Verpacken eines Gutstapels mit einer Stretchfolienhaube, wobei ein von einem Folienschlauchwickel abgezogener, kopfseitig mit einer Schweißnaht geschlossener und fußseitig offener Schlauchabschnitt vom Folienschlauch abgeschnitten wird sowie die so entstandene Stretchfolienhaube geöffnet, in Haubenlängsrichtung gerafft und in Haubenquerrichtung gespannt sowie dann über den Gutstapel gezogen wird, dadurch gekennzeichnet, daß die Kopfschweißnaht der jeweils folgenden Stretchfolienhaube am Folienschlauch gelegt wird, während die jeweils vorangehende Stretchfolienhaube gespannt und über den Gutstapel gezogen wird.Process for packaging a stack of goods with a stretch film hood, wherein a tube section which has been pulled from a film tube wrap, is closed at the head with a weld seam and is open on the foot side is cut off from the film tube and the resulting stretch film hood is opened, gathered in the longitudinal direction of the hood and stretched in the transverse direction of the hood and then pulled over the stack of goods , characterized in that the head welding seam of the following stretch film hood is placed on the film tube, while the respectively preceding stretch film hood is stretched and pulled over the stack of goods. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß nach dem Abschneiden der jeweils vorangehenden Stretchfolienhaube die Kopfschweißnaht in einem der Haubenlänge entsprechenden Abstand vom freien Ende des Folienschlauchs gelegt wird.A method according to claim 1, characterized in that after cutting off the preceding stretch film hood, the head weld seam is placed at a distance corresponding to the hood length from the free end of the film tube. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Höhe des jeweils folgenden Gutstapels gemessen und daraus die erforderliche Haubenlänge bestimmt wird und daß die Kopfschweißnaht in einem dieser Haubenlänge entsprechenden Abstand vor dem freien Ende des Folienschlauches gelegt wird.A method according to claim 1, characterized in that the height of the following stack of goods is measured and the required hood length is determined therefrom and that the head weld seam is placed at a distance corresponding to this hood length in front of the free end of the film tube. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 3, mit Führungen für den Folienschlauch, einer Schweißeinrichtung für die Kopfschweißnaht, einer Trenneinrichtung zum Abschneiden der Stretchfolienhaube vom Folienschlauch, einer Einrichtung zum Raffen, Spannen und Ziehen der Stretchfolienhaube über den Gutstapel, dadurch gekennzeichnet, daß die Schweißeinrichtung (17, 18) im Abstand einer Haubenlänge und in Transportrichtung des Folienschlauches (9) vor der Trenneinrichtung (4) angeordnet ist.Device for performing the method according to one of claims 1 to 3, with guides for the film tube, a welding device for the head weld, a separating device for cutting off the stretch film hood from the film tube, a device for gathering, tensioning and pulling the stretch film hood over the stack of goods, characterized in that the welding device (17 , 18) at a distance of a hood length and in the transport direction of the film tube (9) in front of the separating device (4). Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Schweißeinrichtung (17, 18) in Längsrichtung des Folienschlauches (9) verstellbar ist.Apparatus according to claim 4, characterized in that the welding device (17, 18) is adjustable in the longitudinal direction of the film tube (9). Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Schweißeinrichtung (17, 18) einen Stelltrieb aufweist, der von einer im Zuführbereich des jeweils folgenden Gutstapels (3) angeordneten Höhenmeßeinrichtung steuerbar ist.Apparatus according to claim 4 or 5, characterized in that the welding device (17, 18) has an actuating drive which can be controlled by a height measuring device arranged in the feed area of the following stack of goods (3). Vorrichtung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die Schweißeinrichtung (17, 18) auf einem längs des Folienschlauches (9) verfahrbaren Wagen (15) angeordnet ist.Device according to one of claims 4 to 6, characterized in that the welding device (17, 18) is arranged on a carriage (15) which can be moved along the film tube (9). Vorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß auf dem Wagen (15) eine feste (17) und eine bewegliche Schweißbacke (18) angeordnet sind und daß der Folienschlauch (9) sich zwischen den beiden Schweißbacken (17, 18) erstreckt.Device according to one of claims 4 to 7, characterized in that a fixed (17) and a movable welding jaw (18) are arranged on the carriage (15) and in that the film tube (9) is located between the two welding jaws (17, 18) extends.
EP19910108657 1990-06-07 1991-05-28 Device for packing a stack of objects by means of a stretchfoil hood Expired - Lifetime EP0461461B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9006438U 1990-06-07
DE9006438U DE9006438U1 (en) 1990-06-07 1990-06-07 Device for packing a stack of goods with a stretch film hood

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EP0461461A1 true EP0461461A1 (en) 1991-12-18
EP0461461B1 EP0461461B1 (en) 1994-02-16

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DE (2) DE9006438U1 (en)
DK (1) DK0461461T3 (en)

Cited By (2)

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WO2004058569A2 (en) 2002-12-23 2004-07-15 Krones Ag System and method for packaging containers, particularly bottle containers
DE10261550A1 (en) * 2002-12-23 2004-07-15 Krones Ag Packaging system for packs made up of several bottles has conveyer arranging bottles in groups of six, and packaging module spreading plastics foil and wrapping it round bottles

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
EP2336034B1 (en) * 2009-12-21 2013-01-09 MSK - Verpackungs-Systeme GmbH Method and device for wrapping a stack of goods with a film
IT201700106655A1 (en) * 2017-09-22 2019-03-22 Imp A C Srl LOCKER WITH SYSTEM TO FACILITATE THE MAINTENANCE

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EP0184485A1 (en) * 1984-11-12 1986-06-11 Newtec International Process and machine for packaging a load in a length of tubing of flexible material
DE8807293U1 (en) * 1988-06-04 1988-07-21 "Fix" Peter Steimel GmbH & Co KG, 5202 Hennef Device for producing, filling and sealing plastic bags
EP0344815B1 (en) * 1988-06-03 1992-03-04 Bernhard Beumer Maschinenfabrik KG Method and device for wrapping products, in particular stacks of products, in a stretchable film cover

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US3852937A (en) * 1968-08-06 1974-12-10 Auburn Eng Inc Shrink-wrapping method and apparatus
EP0184485A1 (en) * 1984-11-12 1986-06-11 Newtec International Process and machine for packaging a load in a length of tubing of flexible material
EP0344815B1 (en) * 1988-06-03 1992-03-04 Bernhard Beumer Maschinenfabrik KG Method and device for wrapping products, in particular stacks of products, in a stretchable film cover
DE8807293U1 (en) * 1988-06-04 1988-07-21 "Fix" Peter Steimel GmbH & Co KG, 5202 Hennef Device for producing, filling and sealing plastic bags

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004058569A2 (en) 2002-12-23 2004-07-15 Krones Ag System and method for packaging containers, particularly bottle containers
DE10261550A1 (en) * 2002-12-23 2004-07-15 Krones Ag Packaging system for packs made up of several bottles has conveyer arranging bottles in groups of six, and packaging module spreading plastics foil and wrapping it round bottles
DE10261550B4 (en) * 2002-12-23 2006-07-06 Krones Ag Apparatus and method for packaging containers, in particular bottle containers

Also Published As

Publication number Publication date
DE9006438U1 (en) 1990-09-13
EP0461461B1 (en) 1994-02-16
DK0461461T3 (en) 1994-03-14
DE59101018D1 (en) 1994-03-24

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