EP0266562B1 - Apparatus for shrinking wrapping foils - Google Patents

Apparatus for shrinking wrapping foils Download PDF

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Publication number
EP0266562B1
EP0266562B1 EP19870114435 EP87114435A EP0266562B1 EP 0266562 B1 EP0266562 B1 EP 0266562B1 EP 19870114435 EP19870114435 EP 19870114435 EP 87114435 A EP87114435 A EP 87114435A EP 0266562 B1 EP0266562 B1 EP 0266562B1
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EP
European Patent Office
Prior art keywords
shrink
slide
area
unit
film
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Expired - Lifetime
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EP19870114435
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German (de)
French (fr)
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EP0266562A1 (en
Inventor
Hans Dentz
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Dentz Verpackungsmaschinen GmbH
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Dentz Verpackungsmaschinen GmbH
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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 packaging films according to the preamble of claim 1.
  • a device is known from FR-A-2158936.
  • the packaging film can be a sack or hood-shaped film, which is placed with its hood opening down over the packaged goods unit until its hood bottom on the The top and its hood edge extends below the underside of the packaged goods unit, but it can also be, for example, an already stretched and thus elastically tightly wrapped film web or a similar shrinkable wrapping around the packaged goods unit.
  • this known device shrinks the packaging film over the entire horizontal circumference of the packaged goods unit at the same time. With some types of packaging film and packaging material units, this can lead to the fact that the heat rising over the entire circumference of the packaging material unit from the shrink heaters leads to such a strong shrinking of the film above the underside of the packaging material unit at the beginning of the shrinking process.
  • edge of the packaging film intended for gripping the underside of the underside of the packaged goods unit is pulled up over the underside of the packaged goods unit before proper shrinking and thereby forms, for example, moon-like openings in the packaging in the region of the lower edge of the packaged goods unit.
  • the invention has for its object to provide a device of the type mentioned, which ensures such targeted heat application with a simple structure that first the lower edge of the packaging film is securely shrunk under the packaged goods unit without being able to be pulled up.
  • the shrink field determined by the nominal size of the shrink heater extends both with its extension in the circumferential direction of the packaging item unit only over a part of this circumference and with its height extension only over a preferably larger fraction of the height of the packaging item unit, so that at the beginning of theshrinking process first brought only a part of the lower edge of the packaging film into the shrink position and then gradually the remaining part is also brought into the shrink position.
  • shrink properties of the packaging film it is also conceivable to simultaneously shrink the first shrinking process of the lower edge of the packaging film along approximately at least one side, approximately two sides that are mutually opposite or at an angle, or approximately along three sides Make angles of mutually adjacent sides of the packaging material unit, so that the circumferential part of the lower edge of the packaging film which has not yet been recorded is then less than half of the total circumference.
  • a particularly advantageous embodiment of the device results, however, from the embodiment according to claim 2, a shrinking field of approximately 20 cm in the circumferential direction and / or 20 cm in the height direction being particularly expedient.
  • the circumferential extent of the respective shrinking field is expediently at most one tenth, in particular less than one twentieth, preferably at most about thirtieth of this nominal size, while the height of the shrinking field in relation to the associated nominal height of the device is approximately can be of the order of a fifth to a fifteenth, in particular of the order of about a tenth. In any case, the height of the shrinkage field is expediently less than half the height of the packaged goods unit.
  • a particularly careful shrinking of the lower and upper edge of the packaging film is achieved because first only the lower edge of the packaging film is shrink-wrapped in a horizontal ring path, after which the circumferential surfaces of the packaged goods unit are increased in a spiral shape and finally are closed again upper annular end web, the uppermost part of the packaging film is shrunk as a so-called top or cover shrink.
  • the lifting device can be designed in such a way that the device can also be converted at any time into a packaging device for film wrap packaging on packaged goods units, such as palletized stacks of goods to be positioned on a shelf.
  • a delivery device for the film web can be attached to the lifting device in addition to the shrink heater or exchangeable against it, this delivery device being assigned to one of two device units rotatable relative to one another with a drive about the winding axis and one arranged on the delivery device for the film web
  • Tensioning device with a retarding element which releases the release of the film can be provided so that the film web running, for example, from a storage roll is wound up with constant elongation.
  • the efficiency and thus the working speed of the device can be significantly increased by the fact that the distance of the shrink heater from the vertical central axis of the packaged goods unit is not fixed, but can be changed so that this distance to different circumferential widths of packaged goods units and possibly can be adapted to the irregular circumferential shape deviating from the cylindrical shape. If the distance between the shrink heater is kept constant over the entire circumference of the packaged goods unit, regardless of this circumferential shape, the field size of the shrinking field is constant over the circumference of the packaged goods unit.
  • the design of the control device allows the device to be used automatically, regardless of the height of the packaging goods unit.
  • a device 1 for shrinking packaging films 2 on packaging material units 3, which in the exemplary embodiment shown consists of packaging material 4 stacked on a pallet 5, has a single shrink heater 6 with one or two adjacent heating heads 7 and a receiving console 8 formed by the floor of the building space or preferably in the exemplary embodiment shown by a turntable 9.
  • the plate-shaped flat and therefore only slightly protruding from the floor of the building circular turntable 9 can be rotated with a drive about its vertical central axis 10, the packaged goods unit 3 being expediently arranged on the turntable 9 such that its vertical central axis is aligned with the central axis 10 coincides.
  • a ramp plate that rises flat from the floor level leads to the top of the receiving console 8, so that the packaged goods 3 can be easily moved onto the turntable 9, for example with a lifting truck.
  • a substantially smaller, for example plate-shaped, base pedestal 11 is arranged relative to the base of the goods to be packaged 3 or the pallet 5, which is so large that on the one hand the goods to be packaged 3 have a secure stand and on the other hand its underside in the edge area at a distance above the top of the turntable 9 is exposed over the entire circumference.
  • the shrink heater 6 has a vertical column 12 which is higher than the highest packaged item 3 to be processed and which is equipped with a lifting device, for example a vertical threaded spindle, a cable or chain drive or the like Height slide 14 is provided, which can be moved on the side facing the central axis 10 in a slide guide of the column 12 formed, for example, by a vertical slot.
  • a lifting device for example a vertical threaded spindle, a cable or chain drive or the like
  • Height slide 14 is provided, which can be moved on the side facing the central axis 10 in a slide guide of the column 12 formed, for example, by a vertical slot.
  • the heating head 7 is expediently attached via a ball-and-socket joint in such a way that it has two pivot axes intersecting at right angles, behind its front side or in the transition area in the slide 14, with respect to its horizontally directed towards the packaged goods 3 in the middle position
  • the central axis can be pivoted upwards and downwards and laterally on both sides and can be fixed in the respectively set position, so that it is possible to adjust the angle of attack of the heating head 7 to the respective requirements relative to the outer surfaces of the packaged goods unit 3.
  • the heating head 7 can be easily detachable or exchangeable against a retrofitting device on the height slide 14, or instead or in addition to this the height slider 14 including the heating head 7 can be easily removed or can be exchanged for the slide of the retrofitting device mentioned on the Carriage of the column 12 may be attached.
  • the distance of the heating head 7 from the central axis 10 can be changed, it being conceivable to mount the heating head 7 adjustable and fixable transversely to the central axis 10 with respect to the height slide 14 or, if necessary, to load it against the central axis 10 with a pressing device such as a spring and to keep at a constant distance from the packaged goods unit 3 with a copying device.
  • a pressing device such as a spring
  • the entire shrink heater 6 or the column 12 is adjustable transversely to the central axis 10.
  • the lower end of the column 12 is arranged on a cross slide 15, which is mounted in a slide guide 16 of the device 1 standing on the floor, displaceable at right angles to the central axis 10 and, if necessary, fixable.
  • the copying device 17 can have, for example, a copying arm 18 projecting from the column 12 or from the height slide 14 in the direction of the central axis 10 or to the packaged goods unit 3, which has a runner, in particular a rolling running member, such as a roller on the outer circumference of the packaged goods unit runs approximately in the axial plane of the central axis 10 that passes through the central axis of the heating head 7.
  • the carriage 15 is resiliently loaded in the direction of the central axis 10 with the mentioned pressing device.
  • An optical scanning device 19 in the form of, for example, a photocell arranged on the height slide 14 is provided for contact-free scanning, in particular of the upper and / or the lower limit of the packaged goods unit 3, which also has an operating and program control device 20 for the device 1 in FIG cooperates descriptively.
  • Thisshrinking field 21 may also be smaller than the heating opening of the heating head 7, but is usually larger, as indicated by dash-dotted lines in FIG.
  • the control device 20 acting on the drive of the turntable 9 and on the lifting device 13 is programmed so that the shrinking field 21 extends at the beginning of the shrinking process to below the underside 29 of the packaged goods unit 3, for example the central axis of the heating opening in a horizontal plane 26 can lie, which is approximately at the level of this underside 29 or only slightly above.
  • the turntable 9 performs at least approximately one full revolution, as a result of which the packaging film 2 is shrunk mainly only in the region of the edge 28, which initially still hangs over the underside 29 of the packaged goods unit 3, such that this edge 28 is under the shrinkage tension strikes horizontally inwards and lies against the underside 29 of the packaged goods unit 3.
  • the shrinking field 21 is moved upwards in relation to the outer circumference of the packaging film 2 in a helical path section 24, the Slope approximately the same as the height of the shrinking field 21 or, on the other hand, depending on the shrinking properties of the packaging film, can be smaller and in some cases slightly larger.
  • the optical scanning device 19 is adjusted so that when it detects the upper end of the packaged goods unit 3, the central axis of the shrinking field 21 coinciding with the central axis of the heating head 7 by stopping the lifting device 13 at an altitude is set, which is approximately at the top of the packaged goods unit 3, preferably slightly above; the height of the corresponding upper plane 27, which is parallel to the plane 26, can be such that its distance is approximately equal to or smaller than the distance of the lower boundary of the shrinking field 21 from its central axis.
  • the shrinking field passes from the helical path section without interruption again into a ring section which is closed at right angles to the central axis 10 and which represents the upper end 25 of the shrink path 22, it also being sufficient in this case if the turntable 9 after reaching it the upper end position by the shrink heater 6 only approximately one revolution.
  • the edge 28 Since at the beginning of the shrink path 22 essentially only the edge 28 is initially shrunk completely over the circumference of the packaged goods unit 3 on the underside 29 thereof and is therefore also significantly stiffened, namely shrunk, compared to its original stretchability in the non-or only partially shrunk state , and because then the surface shrinkage on the outer circumference of the packaging film 2 always only takes place over a partial section of the edge 28 that has already been shrunk, there is no risk that the edge 28 can be pulled up again over the underside of the packaged goods unit 3 when the surface is shrunk.

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

Description

Die Erfindung betrifft eine Vorrichtung zum Schrumpfen von Verpackungsfolien nach dem Oberbegriff des Patentanspruches 1. Eine derartige Vorrichtung ist bekannt aus der FR-A-2158936.The invention relates to a device for shrinking packaging films according to the preamble of claim 1. Such a device is known from FR-A-2158936.

Zum Schrumpfen von Verpackungsfolien, insbesondere auf Großverpackungen, wie Güterstapeln, die auf normierten Paletten, wie Holzpaletten angeordnet sind, ist es nach der EP-A-133 462 bekannt, einen horizontal liegenden Rahmen mit über den Rahmenumfang verteilten, in die Rahmenöffnung gerichteten Schrumpfheizern vorzusehen und diesen Rahmen so in Höhenrichtung über die mit der Verpackungsfolie bedeckte Verpackungsgut-Einheit zu bewegen, daß sich letztere in der Rahmenöffnung befindet. Die Verpackungsfolie kann eine sack- bzw. haubenförmige Folie sein, die mit ihrer Haubenöffnung nach unten über die Verpackungsgut-Einheit gestülpt wird, bis ihr Haubenboden an der Oberseite und ihr Haubenrand bis unter die Unterseite der Verpackungsgut-Einheit reichend liegt, sie kann aber auch eine beispielsweise bereits gestreckt und damit elastisch straff um die Verpackungsgut-Einheit gewickelte Folienbahn oder eine ähnliche schrumpffähige Umhüllung sein. In jedem Fall schrumpft diese bekannte Vorrichtung die Verpackungsfolie über den gesamten horizontalen Umfang der Verpackungsgut-Einheit gleichzeitig. Dies kann bei manchen Arten von Verpackungsfolien und Verpackungsgut-Einheiten dazu führen, daß die über den gesamten Umfang der Verpackungsgut-Einheit von den Schrumpfheizern aufsteigende Wärme bereits am Anfang des Schrumpfvorganges zu einem so starken Schrumpfen der Folie oberhalb der Unterseite der Verpackungsgut-Einheit führt, daß der für das geschrumpfte Untergreifen der Unterseite der Verpackungsgut-Einheit bestimmte Rand der Verpackungsfolie vor dem ordnungsgemäßen Unterschrumpfen über die Unterseite der Verpackungsgut-Einheit hochgezogen wird und dadurch beispielsweise mondartige Öffnungen der Verpackung im Bereich der Unterkante der Verpackungsgut-Einheit bildet.For shrinking packaging films, in particular on large packs, such as stacks of goods, which are arranged on standardized pallets, such as wooden pallets, it is known according to EP-A-133 462 to provide a horizontally lying frame with shrink heaters distributed over the circumference of the frame and directed into the frame opening and to move this frame in the vertical direction over the packaging material unit covered with the packaging film in such a way that the latter is located in the frame opening. The packaging film can be a sack or hood-shaped film, which is placed with its hood opening down over the packaged goods unit until its hood bottom on the The top and its hood edge extends below the underside of the packaged goods unit, but it can also be, for example, an already stretched and thus elastically tightly wrapped film web or a similar shrinkable wrapping around the packaged goods unit. In any case, this known device shrinks the packaging film over the entire horizontal circumference of the packaged goods unit at the same time. With some types of packaging film and packaging material units, this can lead to the fact that the heat rising over the entire circumference of the packaging material unit from the shrink heaters leads to such a strong shrinking of the film above the underside of the packaging material unit at the beginning of the shrinking process. that the edge of the packaging film intended for gripping the underside of the underside of the packaged goods unit is pulled up over the underside of the packaged goods unit before proper shrinking and thereby forms, for example, moon-like openings in the packaging in the region of the lower edge of the packaged goods unit.

Es ist auch bekannt, die umhüllende Verpackungsfolie nur auf einem Teil ihres Umfanges, jedoch über die gesamte Höhe der Verpackungsgut-Einheit durchgehend mit einer Schrumpfheizer-Säule zu beheizen, jedoch kann hier ebenfalls die Gefahr bestehen, daß die oberhalb der Unterseite der Verpackungsgut-Einheit relativ schnell schrumpfenden Bereiche der Verpackungsfolie den unteren Rand vor Erreichen einer ordnungsgemäßen Unterschrumpf-Lage über die Unterseite der Verpackungsgut-Einheit hochziehen.It is also known to heat the enveloping packaging film only on part of its circumference, but continuously over the entire height of the packaging material unit, using a shrink heater column, but there may also be a risk here that it is above the underside of the packaging material unit Relatively quickly shrinking areas of the packaging film pull the lower edge over the underside of the packaged goods unit before reaching a proper shrink position.

Schließlich ist es durch die FR-A-25 65 553 auch bekannt, eine rein schlauchförmige, radial nicht umzulegende Verpackungsfolie von unten nach oben in übereinananderliegenden Ringzonen zu schrumpfen, wobei in jeder Ringzone in Umfangsrichtung nach und nach fortlaufend geschrumpft und dann in Höhenrichtung zur nächsten Ringzone weitergefahren wird. Die besonderen Probleme im Zusammenhang mit einer Unterschrumpfung sind hier nicht gegeben.Finally, it is also known from FR-A-25 65 553 to shrink a purely tubular packaging film which cannot be turned over radially from bottom to top in overlapping ring zones, gradually shrinking in the circumferential direction in each ring zone and then shrinking in the height direction to the next Ring zone is continued. The particular problems associated with shrinking are not given here.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der genannten Art zu schaffen, welche bei einfachem Aufbau eine derart gezielte Wärmebeaufschlagung gewährleistet, daß zunächst der untere Rand der Verpackungsfolie mit Sicherheit unter die Verpackungsgut-Einheit eingeschrumpft wird, ohne nach oben gezogen werden zu können.The invention has for its object to provide a device of the type mentioned, which ensures such targeted heat application with a simple structure that first the lower edge of the packaging film is securely shrunk under the packaged goods unit without being able to be pulled up.

Diese Aufgabe wird bei einer Vorrichtung der eingangs beschriebenen Art gemäß der Erfindung durch die Weiterbildung nach dem kennzeichnenden Teil des Patentanspruches 1 gelöst. Das durch die Nenngröße des Schrumpfheizers bestimmte Schrumpffeld reicht sowohl mit seiner Erstreckung in Umfangsrichtung der Verpackungsgut-Einheit nur über einen Teil dieses Umfanges als auch mit seiner Höhenerstreckung nur über einen, vorzugsweise demgegenüber größeren Bruchteil der Höhe der Verpackungsgut-Einheit, so daß am Anfang des Schrumpfvorganges zunächst nur ein Teil des unteren Randes der Verpackungsfolie in Unterschrumpflage gebracht und dann der restliche Teil nach und nach ebenfalls in Unterschrumpflage überführt wird.This object is achieved in a device of the type described at the outset according to the invention by the development according to the characterizing part of patent claim 1. The shrink field determined by the nominal size of the shrink heater extends both with its extension in the circumferential direction of the packaging item unit only over a part of this circumference and with its height extension only over a preferably larger fraction of the height of the packaging item unit, so that at the beginning of the Shrinking process first brought only a part of the lower edge of the packaging film into the shrink position and then gradually the remaining part is also brought into the shrink position.

Je nach Form der Verpackungsgut-Einheit und nach Eigenschaften, insbesondere Schrumpfeigenschaften der Verpackungsfolie ist es auch denkbar, den ersten Schrumpfvorgang des unteren Randes der Verpackungsfolie gleichzeitig entlang annähernd mindestens einer Seite, annähernd zweier einander gegenüber oder im Winkel aneinanderschließender Seiten oder aber annähernd entlang dreier im Winkel aneinanderschließender Seiten der Verpackungsgut-Einheit vorzunehmen, so daß dann ggf. der noch nicht erfaßte Umfangsteil des unteren Randes der Verpackungsfolie kleiner als die Hälfte des Gesamtumfanges ist. Eine besonders vorteilhafte Ausbildung der Vorrichtung ergibt sich jedoch durch die Ausbildung nach Patentanspruch 2, wobei ein Schrumpffeld etwa in der Größenordnung von 20 cm in Umfangsrichtung und/oder 20 cm in Höhenrichtung besonders zweckmäßig ist. Bezogen auf den Nennumfang der größten, mit der Vorrichtung zu bearbeitenden Verpackungsgut-Einheit beträgt die Umfangserstreckung des jeweiligen Schrumpffeldes zweckmäßig höchstens ein Zehntel, insbesondere weniger als ein Zwanzigstel, vorzugsweise höchstens etwa ein Dreißigstel dieses Nennumfanges, während die Höhe des Schrumpffeldes in Bezug auf die zugehörige Nennhöhe der Vorrichtung etwa in der Größenordnung zwischen einem Fünftel und einem Fünfzehntel, insbesondere in der Größenordnung von etwa einem Zehntel liegen kann. In jedem Fall ist die Höhe des Schrumpffeldes zweckmäßig kleiner als die Hälfte der Höhe der Verpackungsgut-Einheit.Depending on the shape of the packaged goods unit and on properties, in particular shrink properties of the packaging film, it is also conceivable to simultaneously shrink the first shrinking process of the lower edge of the packaging film along approximately at least one side, approximately two sides that are mutually opposite or at an angle, or approximately along three sides Make angles of mutually adjacent sides of the packaging material unit, so that the circumferential part of the lower edge of the packaging film which has not yet been recorded is then less than half of the total circumference. A particularly advantageous embodiment of the device results, however, from the embodiment according to claim 2, a shrinking field of approximately 20 cm in the circumferential direction and / or 20 cm in the height direction being particularly expedient. Based on the nominal size In the largest packaged goods unit to be processed with the device, the circumferential extent of the respective shrinking field is expediently at most one tenth, in particular less than one twentieth, preferably at most about thirtieth of this nominal size, while the height of the shrinking field in relation to the associated nominal height of the device is approximately can be of the order of a fifth to a fifteenth, in particular of the order of about a tenth. In any case, the height of the shrinkage field is expediently less than half the height of the packaged goods unit.

Es wird eine besonders sorgfältige Schrumpfung des unteren und oberen Randes der Verpackungsfolie erreicht, weil zuerst in einer horizontalen Ringbahn im wesentlichen ausschließlich der untere Rand der Verpackungsfolie untergeschrumpft wird, wonach wendelförmig ansteigend die Umfangsflächen der Verpackungsgut-Einheit flächengeschrumpft werden und schließlich wird wiederum in einer geschlossenen oberen ringförmigen Endbahn der oberste Teil der Verpackungsfolie als sogenannter Ober- oder Deckschrumpf geschrumpft.A particularly careful shrinking of the lower and upper edge of the packaging film is achieved because first only the lower edge of the packaging film is shrink-wrapped in a horizontal ring path, after which the circumferential surfaces of the packaged goods unit are increased in a spiral shape and finally are closed again upper annular end web, the uppermost part of the packaging film is shrunk as a so-called top or cover shrink.

Da auch bei der erfindungsgemäßen Ausbildung vom Schrumpfheizer Wärme nach oben aufsteigt und dadurch die jeweils oberhalb des Schrumpffeldes liegenden Bereiche der Verpackungsfolie zwar vorgewärmt, jedoch wegen der horizontalen Relativbewegung des in Bezug auf die Höhe der Verpackungsfolie kleineren Schrumpffeldes noch nicht geschrumpft werden, kann mit zunehmender Höhenlage des Schrumpffeldes die Geschwindigkeit von dessen Lageveränderung in Umfangsrichtung und/oder der Steigungswinkel seiner Wendelbahn erhöht werden, wobei es auch denkbar ist, durch geringe Abstandsvergrößerung des berührungsfrei gegenüber der Verpackungsfolie geführten Schrumpfheizers die Feldgröße des Schrumpffeldes mit zunehmender Höhenlage zu vergrößern.Since heat also rises from the shrink heater in the embodiment according to the invention and, as a result, the areas of the packaging film lying above the shrink field are preheated, but cannot be shrunk due to the horizontal relative movement of the smaller shrink field with respect to the height of the packaging film, the higher the altitude of the shrinking field, the speed of its change in position in the circumferential direction and / or the pitch angle of its spiral path can be increased, wherein it is also conceivable to increase the contact-free distance by a small increase in distance of the packaging film guided shrink heater to increase the field size of the shrink field with increasing altitude.

Sowohl bei elektrisch betriebener als auch bei gasbrennerbetriebener und auch bei heißluftbetriebener Ausbildung des Schrumpfheizers ist es denkbar, das jeweilige Schrumpffeld durch einen einzigen, aber auch durch zwei oder mehr gesonderte, auf ein gemeinsames Schrumpffeld gerichtete Heizköpfe zu bestimmen, die beispielsweise jeweils ein von der Kreisform abweichendes, insbesondere in Höhenrichtung länglich begrenztes, beispielsweise flachovales Heizfeld bestimmen und unmittelbar nebeneinanderliegend so ausgerichtet sind, daß sie ein demgegenüber etwa doppelt so großes Schrumpffeld bestimmen.In the case of electrically operated as well as gas burner operated and also hot air operated training of the shrink heater, it is conceivable to determine the respective shrinking field by a single, but also by two or more separate heating heads directed towards a common shrinking field, each of which, for example, has a circular shape Determine deviating, in particular elongated in the height direction, for example flat oval heating field and are aligned directly next to one another in such a way that they determine a shrinking field which is about twice as large.

Die Hubeinrichtung kann so ausgebildet sein, daß die Vorrichtung auch jederzeit zu einer Verpackungs-Vorrichtung für Folien-Wickelverpackungen an Verpackungsgut-Einheiten,wie palettierten, auf einer Stellfläche zu positionierenden Güterstapeln umgerüstet werden kann. In diesem Fall kann zusätzlich zum Schrumpfheizer oder gegen diesen auswechselbar an der Hubeinrichtung eine Abgabeeinrichtung für die Folienbahn angebracht werden, wobei diese Abgabeeinrichtung einer von zwei gegeneinander mit einem Antrieb um die Wickelachse drehbaren Vorrichtungs-Einheiten zugeordnet ist und für die Folienbahn eine an der Abgabeeinrichtung angeordnete Straffeinrichtung mit einem die Folienabgabe gebremst freigebenden Verzögerungsglied vorgesehen sein kann, so daß die beispielsweise von einer Speicherrolle ablaufende Folienbahn unter ständiger Längenstreckung aufgewickelt wird. Dadurch können mit ein und derselben Vorrichtung sehr unterschiedliche Verpackungen hergestellt werden, insbesondere wenn der Umrüstsatz für Folien-Wickelverpackungen mit der Straffeinrichtung eine in sich geschlossene, als Ganzes zu montierende Baugruppe bildet.The lifting device can be designed in such a way that the device can also be converted at any time into a packaging device for film wrap packaging on packaged goods units, such as palletized stacks of goods to be positioned on a shelf. In this case, a delivery device for the film web can be attached to the lifting device in addition to the shrink heater or exchangeable against it, this delivery device being assigned to one of two device units rotatable relative to one another with a drive about the winding axis and one arranged on the delivery device for the film web Tensioning device with a retarding element which releases the release of the film can be provided so that the film web running, for example, from a storage roll is wound up with constant elongation. As a result, very different packagings can be produced with one and the same device, in particular if the conversion kit for film wrap packings forms a self-contained assembly to be assembled as a whole with the tensioning device.

Der Wirkungsgrad und damit die Arbeitsgeschwindigkeit der Vorrichtung können noch wesentlich dadurch gesteigert, werden, daß der Abstand des Schrumpfheizers von der vertikalen Mittelachse der Verpackungsgut-Einheit nicht feststehend, sondern so veränderbar ist, daß dieser Abstand an unterschiedliche Umfangsweiten von Verpackungsgut-Einheiten sowie ggf. an deren von der Zylinderform abweichende unregelmäßige Umfangsform angepaßt werden kann. Wird der Abstand des Schrumpfheizers unabhängig von dieser Umfangsform über den gesamten Umfang der Verpackungsgut-Einheit konstant gehalten, so ergibt sich auch eine über den Umfang der Verpackungsgut-Einheit konstante Feldgröße des Schrumpffeldes.The efficiency and thus the working speed of the device can be significantly increased by the fact that the distance of the shrink heater from the vertical central axis of the packaged goods unit is not fixed, but can be changed so that this distance to different circumferential widths of packaged goods units and possibly can be adapted to the irregular circumferential shape deviating from the cylindrical shape. If the distance between the shrink heater is kept constant over the entire circumference of the packaged goods unit, regardless of this circumferential shape, the field size of the shrinking field is constant over the circumference of the packaged goods unit.

Durch die Höhe der Verpackungsgut-Einheiten abtastende Ausbildung der Steuereinrichtung kann die Vorrichtung unabhängig von der Höhe der Verpackungsgut-Einheit automatisch arbeitet eingesetzt werden.Due to the height of the packaging goods units, the design of the control device allows the device to be used automatically, regardless of the height of the packaging goods unit.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen auch aus der Beschreibung und den Zeichnungen hervor. Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher erläutert. In den Zeichnungen zeigen:

Fig. 1
eine erfindungsgemäße Vorrichtung in perspektivischer Darstellung,
Fig. 2
die Vorrichtung gemäß Fig. 1 in Vorderansicht.
These and other features of preferred developments of the invention are also apparent from the description and the drawings. An embodiment of the invention is shown in the drawings and is explained in more detail below. The drawings show:
Fig. 1
a device according to the invention in perspective view,
Fig. 2
the device of FIG. 1 in front view.

Wie die Fig. 1 und 2 zeigen, weist eine erfindungsgemäße Vorrichtung 1 zum Schrumpfen von Verpackungsfolien 2 an Verpackungsgut-Einheiten 3, die im dargestellten Ausführungsbeispiel aus auf jeweils eine Palette 5 gestapeltem Verpackungsgut 4 besteht, einen einzigen Schrumpfheizer 6 mit einem oder zwei nebeneinanderliegenden Heizköpfen 7 und eine durch den Gebäuderaum-Boden oder bevorzugt im dargestellten Ausführungsbeispiel durch einen Drehtisch 9 gebildete Aufnahme-Konsole 8 auf. Der plattenförmig flache und daher nur geringfügig über den Gebäuderaum-Boden vorstehende kreisrunde Drehtisch 9 ist mit einem Antrieb um seine vertikale Mittelachse 10 drehbar, wobei die Verpackungsgut-Einheit 3 zweckmäßig so auf dem Drehtisch 9 angeordnet wird, daß ihre vertikale Mittelachse mit der Mittelachse 10 zusammenfällt. Etwa auf der dem Schrumpfheizer 6 gegenüberliegenden Seite führt zu der Oberseite der Aufnahme-Konsole 8 eine vom Bodenniveau flach ansteigende Rampenplatte, damit das Verpackungsgut 3 beispielsweise mit einem Hubwagen leicht auf den Drehtisch 9 gefahren werden kann. Im Zentrum des Drehtisches 9 ist ein gegenüber der Grundfläche des Verpackungsgutes 3 bzw. der Palette 5 wesentlich kleinerer, beispielsweise plattenförmiger Standsockel 11 angeordnet, der so groß ist, daß einerseits das Verpackungsgut 3 einen sicheren Stand hat und andererseits seine Unterseite im Randbereich mit Abstand oberhalb der Oberseite des Drehtisches 9 über den gesamten Umfang frei liegt.As shown in FIGS. 1 and 2, a device 1 according to the invention for shrinking packaging films 2 on packaging material units 3, which in the exemplary embodiment shown consists of packaging material 4 stacked on a pallet 5, has a single shrink heater 6 with one or two adjacent heating heads 7 and a receiving console 8 formed by the floor of the building space or preferably in the exemplary embodiment shown by a turntable 9. The plate-shaped flat and therefore only slightly protruding from the floor of the building circular turntable 9 can be rotated with a drive about its vertical central axis 10, the packaged goods unit 3 being expediently arranged on the turntable 9 such that its vertical central axis is aligned with the central axis 10 coincides. For example, on the side opposite the shrink heater 6, a ramp plate that rises flat from the floor level leads to the top of the receiving console 8, so that the packaged goods 3 can be easily moved onto the turntable 9, for example with a lifting truck. In the center of the turntable 9, a substantially smaller, for example plate-shaped, base pedestal 11 is arranged relative to the base of the goods to be packaged 3 or the pallet 5, which is so large that on the one hand the goods to be packaged 3 have a secure stand and on the other hand its underside in the edge area at a distance above the top of the turntable 9 is exposed over the entire circumference.

Der Schrumpfheizer 6 weist eine vertikale, gegenüber dem höchsten zu verarbeitenden Verpackungsgut 3 höhere Säule 12 auf, die mit einer Hubeinrichtung, beispielsweise einer vertikalen Gewindespindel, einem Seil- oder Kettentrieb oder dgl. für einen Höhenschlitten 14 versehen ist, der an der der Mittelachse 10 zugekehrten Seite in einer beispielsweise durch einen vertikalen Schlitz gebildeten Schlittenführung der Säule 12 verfahrbar ist. An dem Höhenschlitten 14 ist der Heizkopf 7 zweckmäßig über ein kugelgelenkartiges Gelenk so angebracht, daß er um zwei im rechten Winkel einander schneidende, hinter seiner Vorderseite bzw, im Übergangsbereich in den Schlitten 14 liegende Schwenkachsen hinsichtlich seiner in der Mittelstellung horizontal gegen das Verpackungsgut 3 gerichteten Mittelachse nach oben und unten sowie nach beiden Seiten seitlich verschwenkt und in der jeweils eingestellten Lage festgesetzt werden kann, so daß es möglich ist, die Anstellwinkel des Heizkopfes 7 gegenüber den Außenflächen der Verpackungsgut-Einheit 3 an die jeweiligen Erfordernisse anzupassen. Der Heizkopf 7 kann leicht lösbar bzw. gegen eine Umrüst-Vorrichtung auswechselbar am Höhenschlitten 14 angebracht sein oder aber statt dessen bzw. zusätzlich hierzu kann der Höhenschlitten 14 einschließlich des Heizkopfes 7 leicht abnehmbar bzw. gegen den Schlitten der genannten Umrüst-Vorrichtung auswechselbar an der Schlittenführung der Säule 12 angebracht sein.The shrink heater 6 has a vertical column 12 which is higher than the highest packaged item 3 to be processed and which is equipped with a lifting device, for example a vertical threaded spindle, a cable or chain drive or the like Height slide 14 is provided, which can be moved on the side facing the central axis 10 in a slide guide of the column 12 formed, for example, by a vertical slot. On the height slide 14, the heating head 7 is expediently attached via a ball-and-socket joint in such a way that it has two pivot axes intersecting at right angles, behind its front side or in the transition area in the slide 14, with respect to its horizontally directed towards the packaged goods 3 in the middle position The central axis can be pivoted upwards and downwards and laterally on both sides and can be fixed in the respectively set position, so that it is possible to adjust the angle of attack of the heating head 7 to the respective requirements relative to the outer surfaces of the packaged goods unit 3. The heating head 7 can be easily detachable or exchangeable against a retrofitting device on the height slide 14, or instead or in addition to this the height slider 14 including the heating head 7 can be easily removed or can be exchanged for the slide of the retrofitting device mentioned on the Carriage of the column 12 may be attached.

Der Abstand des Heizkopfes 7 von der Mittelachse 10 ist veränderbar, wobei es denkbar ist, den Heizkopf 7 gegenüber dem Höhenschlitten 14 quer zu Mittelachse 10 verstellbar und festsetzbar zu lagern oder ggf. gegen die Mittelachse 10 mit einer Andrückeinrichtung, wie einer Feder zu belasten und mit einer Kopiereinrichtung auf konstantem Abstand gegenüber der Verpackungsgut-Einheit 3 zu halten. Wie Fig. 1 zeigt, ist jedoch der gesamte Schrumpfheizer 6 bzw. die Säule 12 quer zur Mittelachse 10 verstellbar. Zu diesem Zweck ist das untere Ende der Säule 12 auf einem Querschlitten 15 angeordnet, der in einer auf dem Boden stehenden Schlittenführung 16 der Vorrichtung 1 rechtwinklig zur Mittelachse 10 verschiebbar und ggf. festsetzbar gelagert ist. Es ist auch denkbar, das untere Ende der Säule 12 in einer Steckhalterung anzuordnen und etwa radial zur Mittelachse 10 mehrere solcher Steckhalterungen hintereinander vorzusehen, so daß der Radialabstand des Schrumpfheizers 6 von der Mittelachse 10 durch Umsetzen der Säule 12 stufenweise und nicht, wie dargestellt, stufenlos verändert werden kann. Durch die Ausbildung gemäß Fig. 1 ist es auch möglich, den Radialsbstand des Schrumpfheizers 6 von der Mittelachse 10 mit einer Kopiereinrichtung 17 simultan mit dem Drehen des Drehtisches 9 so zu verändern, daß der Heizkopf 7 stets gleichen Abstand vom Außenumfang der Verpackungsgut-Einheit 3 hat. Die Kopiereinrichtung 17 kann beispielsweise einen von der Säule 12 oder vom Höhenschlitten 14 in Richtung zur Mittelachse 10 bzw. zur Verpackungsgut-Einheit 3 abstehenden Kopierarm 18 aufweisen, der mit einem Läufer, insbesondere einem abwälzenden Laufglied, wie einer Rolle am Außenumfang der Verpackungsgut-Einheit etwa in derjenigen Axialebene der Mittelachse 10 läuft, die durch die Mittelachse des Heizkopfes 7 geht. In diesem Fall wird der Schlitten 15 mit der genannten Andrückeinrichtung federnd in Richtung zur Mittelachse 10 belastet.The distance of the heating head 7 from the central axis 10 can be changed, it being conceivable to mount the heating head 7 adjustable and fixable transversely to the central axis 10 with respect to the height slide 14 or, if necessary, to load it against the central axis 10 with a pressing device such as a spring and to keep at a constant distance from the packaged goods unit 3 with a copying device. As shown in FIG. 1, however, the entire shrink heater 6 or the column 12 is adjustable transversely to the central axis 10. For this purpose, the lower end of the column 12 is arranged on a cross slide 15, which is mounted in a slide guide 16 of the device 1 standing on the floor, displaceable at right angles to the central axis 10 and, if necessary, fixable. It is also conceivable to arrange the lower end of the column 12 in a plug holder and approximately radially to the central axis 10 to provide several such plug-in holders one behind the other, so that the radial distance of the shrink heater 6 from the central axis 10 can be changed gradually by moving the column 12 and not, as shown, continuously. 1, it is also possible to change the radial distance of the shrink heater 6 from the central axis 10 with a copying device 17 simultaneously with the rotation of the turntable 9 so that the heating head 7 is always the same distance from the outer circumference of the packaged goods unit 3 Has. The copying device 17 can have, for example, a copying arm 18 projecting from the column 12 or from the height slide 14 in the direction of the central axis 10 or to the packaged goods unit 3, which has a runner, in particular a rolling running member, such as a roller on the outer circumference of the packaged goods unit runs approximately in the axial plane of the central axis 10 that passes through the central axis of the heating head 7. In this case, the carriage 15 is resiliently loaded in the direction of the central axis 10 with the mentioned pressing device.

Zur berührungsfreien Abtastung insbesondere der oberen und/oder der unteren Begrenzung der Verpackungsgut-Einheit 3 ist eine optische Abtasteinrichtung 19 in Form beispielsweise einer am Höhenschlitten 14 angeordneten Fotozelle vorgesehen, die mit einer Bedienungs- und Programm-Steuereinrichtung 20 für die Vorrichtung 1 in noch zu beschreibender Weise zusammenwirkt.An optical scanning device 19 in the form of, for example, a photocell arranged on the height slide 14 is provided for contact-free scanning, in particular of the upper and / or the lower limit of the packaged goods unit 3, which also has an operating and program control device 20 for the device 1 in FIG cooperates descriptively.

Je nach Form der Heizöffnung des Schrumpfheizers 6 bzw. des Heizkopfes 7 und je nach dessen gewählten Anstellwinkeln sowie auch nach dessen Leistungseinstellung und Abstand von der Verpackungsfolie 2 ergibt sich eine bestimmt Form und Größe des vom Heizkopf 7 gleichzeitig so beaufschlagten Feldes, daß der innerhalb der Außenbegrenzung dieses Feldes liegende Abschnitt der Verpackungsfolie 2 ausreichend erhitzt wird, um seine Schrumpftemperatur zu erreichen, also bestimmungsgemäß zu schrumpfen. Dieses Schrumpffeld 21 kann zwar auch kleiner als die Heizöffnung des Heizkopfes 7 sein, ist aber meist, wie in Fig. 2 strichpunktiert angedeutet größer und hat bei zentrisch symmetrischer Ausbildung der Heizöffnung des Heizkopfes 7 infolge der aufsteigenden Wärme nach oben gegenüber der Mittelachse der Heizöffnung eine größere Ausdehnung als nach der Seite und nach unten, so daß sich beispielsweise eine etwa eiförmig nach oben verjüngte Begrenzung des Schrumpffeldes 21 gemäß Fig. 2 ergeben kann.Depending on the shape of the heating opening of the shrink heater 6 or the heating head 7 and depending on its selected angles of attack and also on its power setting and distance from the packaging film 2, a certain shape and size of the field so acted upon by the heating head 7 results that the within the Section of the packaging film 2 lying outside the boundary of this field is heated sufficiently to reach its shrinking temperature, that is to say to shrink as intended. This Shrinking field 21 may also be smaller than the heating opening of the heating head 7, but is usually larger, as indicated by dash-dotted lines in FIG. 2, and has a larger center symmetrical design of the heating opening of the heating head 7 due to the rising heat upwards relative to the central axis of the heating opening Expansion as to the side and downwards, so that, for example, an approximately egg-shaped upward limitation of the shrinking field 21 according to FIG. 2 can result.

Die auf den Antrieb des Drehtisches 9 sowie auf die Hubeinrichtung 13 wirkende Steuereinrichtung 20 ist so programmiert, daß das Schrumpffeld 21 zu Beginn des Schrumpfvorganges bis unter die Unterseite 29 der Verpackungsgut-Einheit 3 reicht, wobei beispielsweise die Mittelachse der Heizöffnung in einer horizontalen Ebene 26 liegen kann, die etwa in Höhe dieser Unterseite 29 oder nur geringfügig darüber liegt. In dieser Höhenlage führt der Drehtisch 9 mindestens annähernd eine volle Umdrehung aus, wodurch die Verpackungsfolie 2 hauptsächlich nur im Bereich des über die Unterseite 29 der Verpackungsgut-Einheit 3 zunächst noch nach unten hängenden Randes 28 so geschrumpft wird, daß dieser Rand 28 unter der Schrumpfspannung horizontal einwärts schlägt und sich an die Unterseite 29 der Verpackungsgut-Einheit 3 anlegt. Ununterbrochen an dieses untere, ringförmige Ende 23 der gesamten, über den Umfang und die Höhe der Verpackungsgut-Einheit 3 gefahrenen Schrumpfbahn 22 anschließend wird das Schrumpffeld 21 in Bezug auf den Außenumfang der Verpackungsfolie 2 in einem wendelförmigen Bahnabschnitt 24 -nach oben gefahren, wobei die Steigung etwa gleich wie die Höhe des Schrumpffeldes 21 oder aber je nach den Schrumpfeigenschaften der Verpackungsfolie demgegenüber kleiner und in manchen Fällen auch geringfügig größer sein kann. Die optische Abtasteinrichtung 19 ist so justiert, daß, wenn sie das obere Ende der Verpackungsgut-Einheit 3 erfaßt, die mit der Mittelachse des Heizkopfes 7 zusammenfallende Mittelachse des Schrumpffeldes 21 durch Stillsetzen der Hubeinrichtung 13 in einer Höhenlage festgelegt wird, die etwa in Höhe der Oberseite der Verpackungsgut-Einheit 3, vorzugsweise geringfügig darüber liegt; die Höhenlage der entsprechenden, zur Ebene 26 parallelen oberen Ebene 27 kann dabei so sein, daß ihr Abstand annähernd gleich oder kleiner als der Abstand der unteren Begrenzung des Schrumpffeldes 21 von seiner genannten Mittelachse ist. Bei Erreichen dieser Höhenlage geht das Schrumpffeld aus dem wendelförmigen Bahnabschnitt ohne Unterbrechung wiederum in einen zur Mittelachse 10 rechtwinkligen, ringförmig geschlossenen Bahnabschnitt über, der das obere Ende 25 der Schrumpfbahn 22 repräsentiert, wobei es auch in diesem Fall genügt, wenn der Drehtisch 9 nach Erreichen der oberen Endlage durch den Schrumpfheizer 6 annähernd nur noch eine einzige Umdrehung ausführt. Da am Anfang der Schrumpfbahn 22 im wesentlichen ausschließlich nur der Rand 28 zunächst vollständig über den Umfang der Verpackungsgut-Einheit 3 an deren Unterseite 29 untergeschrumpft und dadurch auch im Vergleich zu seiner ursprünglichen Dehnbarkeit im nicht oder nur teilweise geschrumpften Zustand wesentlich versteift, nämlich fertiggeschrumpft ist, und weil dann die Flächenschrumpfung am Außenumfang der Verpackungsfolie 2 nur immer über einem Teilabschnitt des bereits fertig ausgeschrumpften Randes 28 erfolgt, besteht keinerlei Gefahr, daß beim Flächenschrumpfen der Rand 28 wieder über die Unterseite der Verpackungsgut-Einheit 3 hochgezogen werden kann.The control device 20 acting on the drive of the turntable 9 and on the lifting device 13 is programmed so that the shrinking field 21 extends at the beginning of the shrinking process to below the underside 29 of the packaged goods unit 3, for example the central axis of the heating opening in a horizontal plane 26 can lie, which is approximately at the level of this underside 29 or only slightly above. At this altitude, the turntable 9 performs at least approximately one full revolution, as a result of which the packaging film 2 is shrunk mainly only in the region of the edge 28, which initially still hangs over the underside 29 of the packaged goods unit 3, such that this edge 28 is under the shrinkage tension strikes horizontally inwards and lies against the underside 29 of the packaged goods unit 3. Continuously to this lower, ring-shaped end 23 of the entire shrink path 22, which is driven over the circumference and the height of the packaging material unit 3, the shrinking field 21 is moved upwards in relation to the outer circumference of the packaging film 2 in a helical path section 24, the Slope approximately the same as the height of the shrinking field 21 or, on the other hand, depending on the shrinking properties of the packaging film, can be smaller and in some cases slightly larger. The optical scanning device 19 is adjusted so that when it detects the upper end of the packaged goods unit 3, the central axis of the shrinking field 21 coinciding with the central axis of the heating head 7 by stopping the lifting device 13 at an altitude is set, which is approximately at the top of the packaged goods unit 3, preferably slightly above; the height of the corresponding upper plane 27, which is parallel to the plane 26, can be such that its distance is approximately equal to or smaller than the distance of the lower boundary of the shrinking field 21 from its central axis. When this altitude is reached, the shrinking field passes from the helical path section without interruption again into a ring section which is closed at right angles to the central axis 10 and which represents the upper end 25 of the shrink path 22, it also being sufficient in this case if the turntable 9 after reaching it the upper end position by the shrink heater 6 only approximately one revolution. Since at the beginning of the shrink path 22 essentially only the edge 28 is initially shrunk completely over the circumference of the packaged goods unit 3 on the underside 29 thereof and is therefore also significantly stiffened, namely shrunk, compared to its original stretchability in the non-or only partially shrunk state , and because then the surface shrinkage on the outer circumference of the packaging film 2 always only takes place over a partial section of the edge 28 that has already been shrunk, there is no risk that the edge 28 can be pulled up again over the underside of the packaged goods unit 3 when the surface is shrunk.

Claims (7)

  1. Apparatus (1) for shrinking packing films (2) on packing product units (3), such as palletized stacks of goods,
    a) in which the packing film (2) extends round the circumference of the unit (3) in a lower bottom area, a circumferential area and a top area,
    b) with shrink heaters provided on a column (12) having means for heating the bottom, circumferential and top areas,
    c) with a revolving table (9) for rotating the unit (3) past the shrink heaters (7),
    characterized by
    d) a slide (4) substantially vertically movable on the column (12),
    d1) which has a shrink heater (7) heating a single shrinkage area (21) only covering part of the height and part of the circumference of the packing film (2) and
    d2) an optical sensor (19) scanning the unit (3),
    e) and by a control device (20), which can be influenced by the sensor (19) and which contains control means for controlling the position and movement of the slide (14) as a function of the rotation of the revolving table (9) and which are constructed for the control of three successive positions and movements:
    e1) positioning the slide (14) in an initial undershrinkage position, in which the shrink heater (7) covers the lower bottom area of the unit (3) and in which the revolving table performs at least one complete revolution without any slide movement, the shrinkage area (21) progressively covering a lower part of the film (2) projecting over the unit (3) in the circumferential direction,
    e2) upward movement of the slide (14) whilst simultaneously rotating the revolving table (9) along the circumferential area and in which the shrinkage area (21) gradually shrinks the film (2) from bottom to top,
    e3) sensing the upper edge of the unit by means of the sensor (19) and positioning the slide (14) in an overshrinkage position following the upward movement, in which the shrink heater (7) covers the top area for at least a complete revolution of the revolving table (9) substantially without any slide movement, the shrinkage area (21) progressively covering an upper part of the film (2) in the circumferential direction.
  2. Apparatus according to claim 1, characterized in that the shrinkage area (21) of the shrink heater (6), starting from a vertical central axis (10) of the packing film (2), covers the circumference of the packing film (2) over an arc angle of less than 180°, particularly less than 90° and preferably less than 10°.
  3. Apparatus according to one of the preceding claims, characterized in that the upward movement of the slide (14) is controllable with variable speed and in particular with upwardly increasing speed and that the shrinkage area (21) is of substantially constant size over the entire shrinkage web (22).
  4. Apparatus according to one of the preceding claims, characterized in that for the shrinkage area (21) at least one separate heating head (7) is provided and is preferably mounted in removable manner.
  5. Apparatus according to one of the preceding claims, characterized in that a reception stand (8) carrying the column is fixed in the vertical direction and the shrink heater (6) is arranged in moveable manner with a lifting device (13).
  6. Apparatus according to one of the preceding claims, characterized in that the shrink heater (6) is adjustably transversely arranged to the circumference of the packing film (2) and preferably the column (12) can be moved in several column mounting supports or is movably mounted with a cross slide (15).
  7. Apparatus according to one of the preceding claims, characterized in that the shrink heater (6) is guided in its radial position relative to the vertical central axis (10) of the packing film (2) with a copying device (17) directly scanning the circumference of the packing product unit (3).
EP19870114435 1986-10-03 1987-10-02 Apparatus for shrinking wrapping foils Expired - Lifetime EP0266562B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863633680 DE3633680A1 (en) 1986-10-03 1986-10-03 DEVICE FOR SHRINKING PACKAGING FILMS
DE3633680 1986-10-03

Publications (2)

Publication Number Publication Date
EP0266562A1 EP0266562A1 (en) 1988-05-11
EP0266562B1 true EP0266562B1 (en) 1993-04-14

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Application Number Title Priority Date Filing Date
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DE (2) DE3633680A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932782A1 (en) * 1988-12-16 1990-06-21 Brega Verpackungsmaschinen Anw Shrink wrapping palletised goods with plastic film - using appts. comprising vertically mobile heating head on pillar fixed to cantilevered arm
DE4318753A1 (en) * 1993-06-05 1994-12-08 Dentz Verpackungsmaschinen Gmb Device for shrinking packaging films on packaging material units
FR2723564B1 (en) * 1994-08-12 1996-09-20 Newtec Int PROCESS AND DEVICE FOR OVERPACKING, BY THERMO-RETRACTION, OF A PALLETIZED LOAD
ITMI20090273A1 (en) * 2009-02-26 2010-08-27 Gda S R L ROTATING PLATFORM THERMORETROL OVEN
HU230529B1 (en) 2013-09-12 2016-11-28 Kőröspack Kft. Device for covering unit-loads with stretch foil
HU230691B1 (en) 2013-12-03 2017-09-28 Kőröspack Kft. Method and equipment for controlling the quantity of foil for wrapping loads of optional size
EP3144231A1 (en) 2015-09-21 2017-03-22 Schermesser Device, assembly and method for packaging an object

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0133462A2 (en) * 1983-08-03 1985-02-27 MSK-Verpackungs-Systeme Gesellschaft mit beschränkter Haftung Method of packing pallettised stacks of goods, and device for carrying out the method

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Publication number Priority date Publication date Assignee Title
DE2153001A1 (en) * 1971-10-25 1973-05-03 Ahrendt & Birkendahl Ohg PROCESS AND DEVICE FOR SHRINKING GOODS IN PLASTIC FILM
US3801268A (en) * 1973-02-16 1974-04-02 D Amo Shrink-wrapping device
FR2565553B1 (en) * 1984-06-08 1987-04-10 Pakem AUTOMATIC PACKAGING MACHINE BY HEATING A HEAT SHRINK SLEEVE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133462A2 (en) * 1983-08-03 1985-02-27 MSK-Verpackungs-Systeme Gesellschaft mit beschränkter Haftung Method of packing pallettised stacks of goods, and device for carrying out the method

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EP0266562A1 (en) 1988-05-11
DE3785414D1 (en) 1993-05-19
DE3633680A1 (en) 1988-04-14

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