EP2495178A1 - Packaging module for containers or groups of items to be surrounded with packaging film and/or shrink film that shrinks under heat - Google Patents
Packaging module for containers or groups of items to be surrounded with packaging film and/or shrink film that shrinks under heat Download PDFInfo
- Publication number
- EP2495178A1 EP2495178A1 EP12154440A EP12154440A EP2495178A1 EP 2495178 A1 EP2495178 A1 EP 2495178A1 EP 12154440 A EP12154440 A EP 12154440A EP 12154440 A EP12154440 A EP 12154440A EP 2495178 A1 EP2495178 A1 EP 2495178A1
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- EP
- European Patent Office
- Prior art keywords
- film
- blanks
- packaging
- packaging module
- transport
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
- B65B11/08—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path
- B65B11/10—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents
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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
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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
- B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
- B65B53/063—Tunnels
Definitions
- the present invention relates to a packaging module for packaging or article groups to be wrapped with packaging and / or heating shrinkable shrink film with the features of independent claim 1.
- the invention further relates to a method for packaging containers or groups of items with heat shrinkable film having the features the independent method claim.
- shrinkable film For packaging of packages or groups of items is shrinkable film that is beaten around the articles and shrunk under heat, whereby a certain mechanical stability and protection against media and environmental influences can be created.
- the processing normally takes place in a so-called packaging module, in which the packs or groups of articles to be packaged are wrapped with the shrinkable film by means of a film wrapping device. Subsequently, the film-wrapped container is fed to a shrinking station, which ensures the required heating of the shrink film, so that it lays firmly around the container or the article.
- the containers or groups of articles to be wrapped are usually transported on a horizontal conveying device or transported vertically in the direction of the shrinking station and wrapped in the transport direction by means of the film wrapping device with a film blank of defined length.
- a film transport and feeding device provides for the promotion of the cut to length film blanks for film wrapping device.
- the films for shrinking of packages and groups of articles are processed at the ambient temperatures prevailing in the machine. This has the consequence that the film must be heated relatively strong in the shrinking station or in the shrink tunnel. In the machine, for example, temperatures of about 10 ... 50 ° C, so in the shrinking station heating of the film to a temperature level of about 90 to 120 ° C is necessary. To overcome this temperature difference within the relatively short transit time of the packaged by the shrinking station, a relatively large heat input is required, which leads to a significant heating of the packaged goods.
- the JP 2007 137 502 A vorifugershire a shrinkable film under heat before wrapping the container or article compositions.
- the JP 2003 054 520 A Preheat the objects to be hammered with foil. In this way, the nestling and the wrapping process should be improved with the shrinkable film.
- the preheating temperature should be in a range which corresponds at least to a softening temperature of the film.
- the heating module for preheating the film is located below a transport plane for the packaged goods, in a region of continuous conveyance of the film. The lengthening of the film blanks necessary for the packaging of the objects takes place after preheating, since the corresponding cutting device is arranged directly below the transport plane.
- the primary objects of the present invention are seen to provide an improved apparatus and a corresponding method for packaging objects, packaged goods, containers o. The like.
- shrinkable film available that allow on the one hand, the unavoidable during shrinkage of the film heat input reduce, while at the same time as trouble-free as possible film transport should be guaranteed.
- the invention proposes a packaging module for packs or groups of articles to be wrapped with packaging film and / or under heat shrinkage, which is transported horizontally or horizontally on a horizontal conveyor to a shrinking station and in the transport direction by means of a film wrapping device with a film blank defined length to be taken.
- a film wrapping device with a film blank defined length to be taken.
- the packaging module comprises a film transporting and feeding device for conveying the cut-to-length film blanks to the film wrapping device.
- the film transport and Feeding device is associated with a tempering device for tempering the film blanks to an elevated temperature which is below the film-specific softening and / or shrinkage temperature.
- the tempering device is arranged between a film cutting device for cutting the film blanks and the film wrapping device.
- the temperature control device is locally limited and arranged immediately before a transfer point to the film wrapping device.
- a typical configuration for such a packaging module may include feeding a shrinkable film from an endless supply, for example, a film roll to the film wrapping module, the film normally being fed obliquely upward from below through a nip in the horizontal conveyor and by means of the film wrapping module during the continuous transport of the packs or groups of items to be hammered.
- the film wrapping module can have, for example, circumferential turning bars, which are guided laterally on endlessly circulating traction means such as chains.
- the temperature of the film to the desired temperature takes place after cutting the film blanks, but before the transfer to the impact module, whereby the placement of the tempering on a range between the cutting module and just before the transfer to the wrapping module, in particular to an area immediately below the Horizontal conveyor is limited.
- the inventively designed packaging module makes it possible to heat the film as far as possible already in the film wrapping module, whereby the "shrinkage start temperature" in the shrink tunnel can be achieved much faster.
- This so-called “shrinkage start temperature” is currently above the available and used polyethylene films above about 90 ° C and below about 120 ° C. The heating takes place shortly before the emergence point of the film and directly before the wrapping process of the packaged goods, whereby the preheated film loses relatively little temperature until reaching the shrinking tunnel.
- a particular advantage of the device according to the invention is the noticeable energy savings, since only a smaller temperature difference (.DELTA.T) must be overcome in the shrink tunnel and thus the heating of the film web with much higher efficiency can be realized.
- the shrinkage results can be improved, since the shrinking process starts faster in the shrink tunnel and thus the film is there less exposed to flowing hot air. The risk of slippage of the film is thus reduced.
- Another advantageous effect may be that the Film, if it is partially preheated, can obtain a different shrinkage dynamics over the area.
- the tempering device can be combined or structurally integrated with a blank transport device for conveying the cut film blanks from the film cutting device to the film wrapping device.
- this transport device is located directly below the transport plane for the packs or article groups, so that the blanks already cut from the continuous film supply and suitably cut to length can be heated and fed to the film wrapping module with almost no time delay and thus virtually without cooling.
- the subsequent shrinking operation in the area of the shrinking station is thereby improved in quality in the manner mentioned above.
- the film is present in the film wrapping module as a flat web for heating many methods into consideration, such as, a contact heating, heating by means of infrared radiators, ultrasonic radiators, induction heaters and / or microwave radiators.
- a contact heating can, for example, be done via appropriately equipped conveyor belts.
- ultrasound it may be useful to provide the film material with suitable susceptors, which improve the absorption properties against the applied radiation and thus the heat development in the film material or only allow.
- the use of infrared radiation, induction radiation or microwave radiation may require the equipment of the film with correspondingly suitable susceptors, since the absorption capacity of the film of polyethylene to infrared radiation, microwave radiation and / or induction radiation is very low.
- the absorbency can be significantly improved with suitable susceptors in the material.
- susceptors are indispensable for low-frequency induction radiation since otherwise the film can not be heated.
- the tempering device should be placed as close as possible to the film dipping point. Furthermore, it can be provided that the tempering device extends over at least one transport section for the film blanks and / or forms at least part of the blank transport device between the cutting device and the transfer point to the film wrapping device.
- the blank transport device can be formed, for example, by at least one vacuum belt which can be acted upon by negative pressure.
- the Temperature control comprise at least a portion of the conveyor belt and / or structurally combined or integrated there.
- the blank transport device may, for example, also be formed by at least one heatable conveyor belt.
- the length of the film heater may be selected to be between the vacuum belt and film platen, to replace part of the vacuum belt, or to replace the entire vacuum belt, but this is only possible with contact heating with a bead.
- the invention has considerable advantages.
- the film web can be stopped after being cut to length and can only be approached again after the film blank has been removed.
- the stationary film is in thermal engagement with the heater, it heats up much more than a film moving continuously through the heated zone.
- the heating device is according to the invention immediately before the film wrapping module. Ideally, the foil needs to be in the point of emergence leave the heater to the product line to keep the cooling section to the downstream shrink tunnel as short as possible, also to heat as few machine parts as possible unnecessarily.
- the invention has the advantage that the heat input can be well modulated and controlled.
- the heat input can thus be adapted to different conveying speeds for the article and the film.
- the heat can be switched off very quickly if needed, especially at a machine stop.
- Known problem areas when shrinking are areas of the container, which are not applied to a bottle, a container or article. In these areas, the film is not cooled by the container contents and it can be easier to form holes on the film. These areas can be exempted from preheating if necessary.
- the present invention comprises a method for packaging containers or groups of items with shrinkable under heat film, the packages or groups of articles standing on a horizontal conveyor or lying transported in the direction of a shrinking station and are wrapped in the transport direction by means of a film wrapping device with a film blank of defined length.
- the cut-to-size film blanks are heated to an elevated temperature below the film-specific softening and / or shrinkage temperature prior to their transfer to the film wrapping device.
- the heating of the film blanks takes place after their cutting by cutting transversely to the direction of film transport and before their transfer to the film wrapping device.
- the film blanks are localized and heated immediately prior to transfer to the film wrapping device.
- An optional equipment of the film preheating invention may provide a temperature control, in which the film temperatures measured at different locations and the heater can be controlled according to need. So for example, the film temperature of the film taken from an endless supply can be measured in order to detect the ambient or exit temperature. After passing through the tempering device, a further measurement can take place, for example by optical sensors, in order to obtain a controlled variable for controlling the heating intensity.
- control measurements in the area between the film wrapping module and the shrinking station and / or in the shrinking station or after this. On the one hand, the control can be sensitively adjusted. In addition, overheating of the film, even local type, can be reliably prevented.
- FIGS. 1 to 4 illustrate various embodiments of a packaging module 8 according to the invention, which may include, for example, the components shown.
- the packaging module 8 is used for packaging and wrapping only indicated here bundles 10 or groups of articles with packaging film or with heat shrinkable film 12, which is unrolled from a film roll 14.
- To be wrapped containers 10 or groups of articles are transported for this purpose lying on a conveyor belt 16 of a horizontal conveyor 18 or standing in the direction 20 to a shrinking station, not shown here and taken in the transport direction 20 by means of a film wrapping device 22 with a film blank 24 of defined length.
- the packs 10 or article groups enveloped by the film blank 24 are heated at least to the extent that the film 12, 24 is stretched around the wrapped objects by a shrinking process.
- the film 12 unrolled from the film roll 14 is conveyed via a film store 26, for example a so-called dancer, as a continuous film web 12 to a deflection 28 with a film cutting device 30 integrated therefrom and from there to a film transporting and feeding device 30 arranged downstream of the cutting device 30 32 led to promote the cut-to-length film blanks 24 to the film wrapping device 22.
- the film transporting and feeding device 32 is assigned a tempering device 34 for controlling the temperature of the film blanks 24 to an elevated temperature.
- the elevated temperature generated by the tempering device 34 is below a film-specific softening and / or shrinkage temperature.
- the tempering device 34 is arranged between a film cutting device 30 for cutting the film blanks 24 and the film wrapping device 22. In this way, the temperature control device 34 is locally limited and arranged immediately before a transfer point 36 to the film wrapping device 22. This transfer point 36 is located directly below a transport plane of the horizontal conveyor 18 and the conveyor belt 16th
- the shrinkable film 12 is supplied from the endless supply of the film roll 14 to the film wrapping module 22, wherein the cut and cut into film blanks 24 film 12 at the transfer point 36 from below through a gap or gap (not shown) in the horizontal conveyor 18 fed obliquely upwards and is beaten by the film wrapping module 22 during the continuous transport of the container to be hammered 10 or groups of articles around this.
- the film wrapping module 22 has circumferential turning bars (not shown), which are laterally guided on endlessly circulating traction means 38 such as chains.
- the temperature of the film 12 to the desired temperature is carried out after cutting the film blanks 24, but before the transfer to the impact module 22, whereby the placement of the temperature control 34 to an area between the cutting module 30 and just before the transfer to the impact module 22 and thus on the in Fig. 1 shown heating area 40 is limited immediately below the horizontal conveyor 18.
- the packaging module 8 shown makes it possible to heat the film 12 already in the film wrapping module 22 as far as possible, whereby a desired inlet temperature of the film for the shrinking process can be achieved in a short time.
- This so-called “shrinkage start temperature” may be above about 90 ° C and below about 120 ° C in the currently available and normally used films 12 made of polyethylene. The heating takes place shortly before the emergence point or the transfer point 36 of the foil blanks 24 and directly before the wrapping process of the packaged goods, whereby the preheated foil 12 loses relatively little temperature until reaching the shrinking tunnel.
- shrinkage start temperature may be above about 90 ° C and below about 120 ° C in the currently available and normally used films 12 made of polyethylene. The heating takes place shortly before the emergence point or the transfer point 36 of the foil blanks 24 and directly before the wrapping process of the packaged goods, whereby the preheated foil 12 loses relatively little temperature until reaching the shrinking tunnel.
- the temperature control device 34 is combined with the blank transport device 32 for transporting the cut to length film blanks 24 from the film cutting device 30 to the film wrapping device 22 or structurally integrated.
- This blank transport device 32 is located directly below the transport plane of the conveyor belt 16 for the containers 10 or groups of articles, so that the blanks 24 already cut off from the endless film stock 14 and suitably cut to size can be heated and fed to the film wrapping module 22 almost without time delay and thus almost without cooling.
- the subsequent shrinking operation in the area of the shrinking station is thereby improved in quality in the manner mentioned above.
- non-contact temperature control device 34 may, for example, one or both sides of the transport path for the film blanks 24 arranged radiator 42, in particular in the form of infrared radiators, ultrasonic radiators, induction radiators and / or microwave radiators o. The like., Include.
- the film material 12 When heating with ultrasound, it may be useful to provide the film material 12 with suitable susceptors (not shown), whereby the absorption properties relative to the applied radiation and thus the heat development in the film material can be improved or made possible.
- suitable susceptors not shown
- the use of infrared radiation, induction radiation or microwave radiation may require the equipment of the film 12 with correspondingly suitable susceptors, since the absorption capacity of film made of polyethylene to infrared radiation, microwave radiation and / or induction radiation is usually too low.
- susceptors are indispensable for low-frequency induction radiation since otherwise the film blanks 24 can not be sufficiently heated.
- the schematic side view of Fig. 3 shows a second embodiment of the packaging module 8, in which the temperature control device 34 of the heating area 40 by a so-called.
- Vacuum conveyor belt 44 and a corresponding heating belt 46 is formed.
- the vacuum conveyor belt 44 may be the lower conveyor belt, which can be acted upon by negative pressure and thus ensures reliable conveying of the film blanks 24 to the transfer point 36, while the upper belt is designed as a heating belt 46, which during the film transport for the desired Temperature control of the film blanks 24 provides.
- the schematic side view of Fig. 4 shows a further embodiment of the packaging module 8, in which the foil blanks 24 are also tempered by means of a contact heating.
- the tempering device 34 is in this case completely integrated into the film blank transport device 32, since this is formed by two heatable conveyor belts 48, between which the film blanks 24 are clamped and guided.
- the heatable conveyor belts 48 take in the embodiment shown largely the entire available space of the heating area 40, while the heating area 40 at the in Fig. 3 shown variant is formed significantly shorter due to the shorter vacuum conveyor belt 44 and heater bands 46.
- the heat input can be well modulated and controlled.
- the heat input can be achieved both by means of the touching conveyor belts 44, 46, 48 (FIG. Fig. 5 ) as well as by means of non-contact radiator units 42 (FIG. Fig. 6 ) can be easily adapted to different conveyor speeds for the container 10 to be hammered and the film blanks 24.
- the heat can be switched off very quickly if needed, especially at a machine stop.
- a suitable insulation 50 preferably provides for a thermal insulation of the heating area 40 and thus for the definition of a system boundary, which facilitates a specific temperature control of the foil blanks 24.
- Fig. 7 divide the bands 44, 46, 48 into a plurality of adjacently located heating zones 52a, 52b, 52c and 52d over the width of the foil and thus define temperature ranges which can be controlled differently, in order to heat up only the marginal areas 52a and 52d more strongly in this way (eg approx. 70 ° C) than the middle portions 52b and 52c (eg, about 50 ° C).
- Fig. 7 divide the bands 44, 46, 48 into a plurality of adjacently located heating zones 52a, 52b, 52c and 52d over the width of the foil and thus define temperature ranges which can be controlled differently, in order to heat up only the marginal areas 52a and 52d more strongly in this way (eg approx. 70 ° C) than the middle portions 52b and 52c (eg, about 50 ° C).
- the film preheating according to the invention preferably comprises a temperature control in which the film temperatures are measured at different locations of the film transport and / or the package transport and the temperature control device 34 can be regulated as required.
- the film temperature of the film 12 removed from the endless supply 14 can be measured in order to detect the ambient or exit temperature.
- a further measurement can take place, for example by optical sensors, in order to obtain a controlled variable for regulating the heating intensity.
- control measurements in the area between the film wrapping module 22 and the shrinking station and / or in the shrinking station or after this.
- the control can be sensitively adjusted.
- overheating of the film blanks 24, including local type can be reliably prevented.
Abstract
Description
Die vorliegende Erfindung betrifft ein Verpackungsmodul für mit Verpackungs-und/oder unter Erwärmung schrumpfbarer Schrumpffolie zu umhüllende Gebinde oder Artikelgruppen mit den Merkmalen des unabhängigen Anspruchs 1. Die Erfindung betrifft weiterhin ein Verfahren zur Verpackung von Gebinden oder Artikelgruppen mit unter Wärmeinwirkung schrumpfbarer Folie mit den Merkmalen des unabhängigen Verfahrensanspruchs.The present invention relates to a packaging module for packaging or article groups to be wrapped with packaging and / or heating shrinkable shrink film with the features of independent claim 1. The invention further relates to a method for packaging containers or groups of items with heat shrinkable film having the features the independent method claim.
Zur Verpackung von Gebinden oder Artikelgruppen eignet sich schrumpfbare Folie, die um die Artikel geschlagen und unter Wärmeeinwirkung geschrumpft wird, wodurch eine gewisse mechanische Stabilität und ein Schutz gegen Medien- und Umwelteinflüsse geschaffen werden kann. Die Verarbeitung erfolgt normalerweise in einem sog. Verpackungsmodul, in dem die zu verpackenden Gebinde oder Artikelgruppen mittels einer Folieneinschlagvorrichtung mit der schrumpfbaren Folie umhüllt werden. Anschließend wird das mit Folie umhüllte Gebinde einer Schrumpfstation zugeführt, die für die erforderliche Erwärmung der Schrumpffolie sorgt, damit sich diese fest um das Gebinde bzw. die Artikel legt. Die zu umhüllenden Gebinde oder Artikelgruppen werden meist auf einer Horizontalfördereinrichtung liegend oder stehend in Richtung der Schrumpfstation transportiert und in Transportrichtung mittels der Folieneinschlagvorrichtung mit einem Folienzuschnitt in definierter Länge eingeschlagen. Eine Folientransport- und Zuführeinrichtung sorgt für die Förderung der abgelängten Folienzuschnitte zur Folieneinschlagvorrichtung. Bei den derzeit eingesetzten Verpackungsmodulen und Folieneinschlageinrichtungen werden die Folien zum Einschrumpfen von Gebinden und Artikelgruppen mit den in der Maschine herrschenden Umgebungstemperaturen verarbeitet. Dies hat zur Folge, dass die Folie in der Schrumpfstation bzw. im Schrumpftunnel relativ stark erwärmt werden muss. Herrschen in der Maschine bspw. Temperaturen von ca. 10 ... 50 °C, so ist in der Schrumpfstation eine Erwärmung der Folie auf ein Temperaturniveau von ca. 90 bis 120 °C notwendig. Zur Überwindung dieser Temperaturdifferenz innerhalb der relativ kurzen Durchlaufzeit des Packgutes durch die Schrumpfstation ist ein relativ großer Wärmeeintrag erforderlich, der zu einer deutlichen Erwärmung des Packgutes führt.For packaging of packages or groups of items is shrinkable film that is beaten around the articles and shrunk under heat, whereby a certain mechanical stability and protection against media and environmental influences can be created. The processing normally takes place in a so-called packaging module, in which the packs or groups of articles to be packaged are wrapped with the shrinkable film by means of a film wrapping device. Subsequently, the film-wrapped container is fed to a shrinking station, which ensures the required heating of the shrink film, so that it lays firmly around the container or the article. The containers or groups of articles to be wrapped are usually transported on a horizontal conveying device or transported vertically in the direction of the shrinking station and wrapped in the transport direction by means of the film wrapping device with a film blank of defined length. A film transport and feeding device provides for the promotion of the cut to length film blanks for film wrapping device. In the packaging modules and film wrapping systems currently in use, the films for shrinking of packages and groups of articles are processed at the ambient temperatures prevailing in the machine. This has the consequence that the film must be heated relatively strong in the shrinking station or in the shrink tunnel. In the machine, for example, temperatures of about 10 ... 50 ° C, so in the shrinking station heating of the film to a temperature level of about 90 to 120 ° C is necessary. To overcome this temperature difference within the relatively short transit time of the packaged by the shrinking station, a relatively large heat input is required, which leads to a significant heating of the packaged goods.
Um den Wärmeeintrag auf das Packgut spürbar zu reduzieren, schlägt bspw. die
Aus der
Die vorrangigen Ziele der vorliegenden Erfindung werden darin gesehen, eine verbesserte Vorrichtung und ein entsprechendes Verfahren zur Verpackung von Objekten, Packgütern, Gebinden o. dgl. mit schrumpfbarer Folie zur Verfügung zu stellen, die es einerseits ermöglichen, den beim Schrumpfvorgang der Folie unvermeidbaren Wärmeeintrag zu reduzieren, wobei gleichzeitig ein möglichst störungsfreier Folientransport gewährleistet sein soll.The primary objects of the present invention are seen to provide an improved apparatus and a corresponding method for packaging objects, packaged goods, containers o. The like. With shrinkable film available that allow on the one hand, the unavoidable during shrinkage of the film heat input reduce, while at the same time as trouble-free as possible film transport should be guaranteed.
Diese Ziele der Erfindung werden mit den Gegenständen der unabhängigen Patentansprüche erreicht. Merkmale vorteilhafter Weiterbildungen der Erfindung ergeben sich aus den jeweiligen abhängigen Ansprüchen. So schlägt die Erfindung zur Erreichung der Ziele ein Verpackungsmodul für mit Verpackungs- und/oder unter Erwärmung schrumpfbarer Folie zu umhüllende Gebinde oder Artikelgruppen vor, die auf einer Horizontalfördereinrichtung liegend oder stehend in Richtung zu einer Schrumpfstation transportiert und in Transportrichtung mittels einer Folieneinschlagvorrichtung mit einem Folienzuschnitt definierter Länge eingeschlagen werden. In der Schrumpfstation werden die mit Folie umhüllten Gebinde oder Artikelgruppen zumindest soweit erwärmt, dass sich die Folie durch einen Schrumpfungsvorgang um die eingehüllten Objekte spannt. Das Verpackungsmodul umfasst eine Folientransport- und Zuführeinrichtung zur Förderung der abgelängten Folienzuschnitte zur Folieneinschlagvorrichtung. Die Folientransport- und Zuführeinrichtung ist einer Temperierungseinrichtung zur Temperierung der Folienzuschnitte auf eine erhöhte Temperatur, die unterhalb der folienspezifischen Erweichungs- und/oder der Schrumpfungstemperatur liegt, zugeordnet. Gemäß der Erfindung ist die Temperierungseinrichtung zwischen einer Folienschneideinrichtung zur Ablängung der Folienzuschnitte und der Folieneinschlagvorrichtung angeordnet. Auf diese Weise ist die Temperierungseinrichtung lokal begrenzt und unmittelbar vor einer Übergabestelle zur Folieneinschlagvorrichtung angeordnet. Eine typische Konfiguration für ein solches Verpackungsmodul kann eine Zuführung einer schrumpfbaren Folie von einem Endlosvorrat, bspw. von einer Folienrolle zum Folieneinschlagmodul vorsehen, wobei die Folie normalerweise von unten durch einen Spalt bzw. eine Lücke in der Horizontalfördereinrichtung schräg nach oben zugeführt und mittels des Folieneinschlagmoduls während des kontinuierlichen Transports der einzuschlagenden Gebinde oder Artikelgruppen um diese geschlagen wird. Das Folieneinschlagmodul kann bspw. umlaufende Einschlagstäbe aufweisen, die seitlich an endlos umlaufenden Zugmitteln wie Ketten geführt sind. Die Temperierung der Folie auf die gewünschte Temperatur erfolgt nach dem Schneiden der Folienzuschnitte, jedoch vor der Übergabe an das Einschlagmodul, wodurch die Platzierung der Temperierungseinrichtung auf einen Bereich zwischen dem Schneidmodul und knapp vor der Übergabe an das Einschlagmodul, insbesondere auf einen Bereich unmittelbar unterhalb der Horizontalfördereinrichtung begrenzt ist.These objects of the invention are achieved with the subject matters of the independent claims. Features of advantageous developments of the invention will become apparent from the respective dependent claims. Thus, in order to achieve the objectives, the invention proposes a packaging module for packs or groups of articles to be wrapped with packaging film and / or under heat shrinkage, which is transported horizontally or horizontally on a horizontal conveyor to a shrinking station and in the transport direction by means of a film wrapping device with a film blank defined length to be taken. In the shrinking station, the bundles or groups of articles wrapped with foil are heated at least to the extent that the foil is stretched around the wrapped objects by a shrinking process. The packaging module comprises a film transporting and feeding device for conveying the cut-to-length film blanks to the film wrapping device. The film transport and Feeding device is associated with a tempering device for tempering the film blanks to an elevated temperature which is below the film-specific softening and / or shrinkage temperature. According to the invention, the tempering device is arranged between a film cutting device for cutting the film blanks and the film wrapping device. In this way, the temperature control device is locally limited and arranged immediately before a transfer point to the film wrapping device. A typical configuration for such a packaging module may include feeding a shrinkable film from an endless supply, for example, a film roll to the film wrapping module, the film normally being fed obliquely upward from below through a nip in the horizontal conveyor and by means of the film wrapping module during the continuous transport of the packs or groups of items to be hammered. The film wrapping module can have, for example, circumferential turning bars, which are guided laterally on endlessly circulating traction means such as chains. The temperature of the film to the desired temperature takes place after cutting the film blanks, but before the transfer to the impact module, whereby the placement of the tempering on a range between the cutting module and just before the transfer to the wrapping module, in particular to an area immediately below the Horizontal conveyor is limited.
Das erfindungsgemäß ausgestaltete Verpackungsmodul ermöglicht es, die Folie bereits im Folieneinschlagmodul so weit wie möglich zu erwärmen, wodurch die "Schrumpfstarttemperatur" im Schrumpftunnel deutlich schneller erreicht werden kann. Diese sog. "Schrumpfstarttemperatur" liegt bei den derzeit verfügbaren und eingesetzten Folien aus Polyethylen oberhalb von ca. 90 °C und unterhalb von ca. 120 °C. Die Erwärmung erfolgt kurz vor dem Auftauchpunkt der Folie und direkt vor dem Einschlagvorgang des Packgutes, wodurch die vorgewärmte Folie bis zum Erreichen des Schrumpftunnels nur relativ wenig Temperatur verliert. Ein besonderer Vorteil der erfindungsgemäßen Vorrichtung ist die spürbare Energieeinsparung, da im Schrumpftunnel nur ein geringerer Temperaturunterschied (ΔT) überwunden werden muss und dadurch die Erwärmung der Folienbahn mit wesentlich höherem Wirkungsgrad realisierbar ist. Zusätzlich können die Schrumpfergebnisse verbessert werden, da der Schrumpfvorgang im Schrumpftunnel schneller startet und damit die Folie dort weniger mit strömender Warmluft beaufschlagt wird. Die Gefahr eines Verrutschens der Folie wird damit reduziert. Ein weiterer vorteilhafter Effekt kann sich dadurch ergeben, dass die Folie, wenn sie bereichsweise vorgewärmt wird, eine über die Fläche unterschiedliche Schrumpfdynamik erhalten kann.The inventively designed packaging module makes it possible to heat the film as far as possible already in the film wrapping module, whereby the "shrinkage start temperature" in the shrink tunnel can be achieved much faster. This so-called "shrinkage start temperature" is currently above the available and used polyethylene films above about 90 ° C and below about 120 ° C. The heating takes place shortly before the emergence point of the film and directly before the wrapping process of the packaged goods, whereby the preheated film loses relatively little temperature until reaching the shrinking tunnel. A particular advantage of the device according to the invention is the noticeable energy savings, since only a smaller temperature difference (.DELTA.T) must be overcome in the shrink tunnel and thus the heating of the film web with much higher efficiency can be realized. In addition, the shrinkage results can be improved, since the shrinking process starts faster in the shrink tunnel and thus the film is there less exposed to flowing hot air. The risk of slippage of the film is thus reduced. Another advantageous effect may be that the Film, if it is partially preheated, can obtain a different shrinkage dynamics over the area.
Gemäß einer Variante des erfindungsgemäßen Verpackungsmoduls kann die Temperierungseinrichtung mit einer Zuschnitttransporteinrichtung zur Beförderung der abgelängten Folienzuschnitte von der Folienschneideinrichtung zur Folieneinschlagvorrichtung kombiniert bzw. baulich integriert sein. Vorzugsweise befindet sich diese Transporteinrichtung unmittelbar unterhalb der Transportebene für die Gebinde oder Artikelgruppen, so dass die bereits vom Endlosfolienvorrat abgeschnittenen und passend abgelängten Zuschnitte erwärmt und nahezu ohne Zeitverzug und damit nahezu ohne Abkühlung dem Folieneinschlagmodul zugeführt werden können. Der anschließende Schrumpfungsvorgang im Bereich der Schrumpfstation wird dadurch in der oben erwähnten Weise in seiner Qualität verbessert.According to a variant of the packaging module according to the invention, the tempering device can be combined or structurally integrated with a blank transport device for conveying the cut film blanks from the film cutting device to the film wrapping device. Preferably, this transport device is located directly below the transport plane for the packs or article groups, so that the blanks already cut from the continuous film supply and suitably cut to length can be heated and fed to the film wrapping module with almost no time delay and thus virtually without cooling. The subsequent shrinking operation in the area of the shrinking station is thereby improved in quality in the manner mentioned above.
Da die Folie im Folieneinschlagmodul als ebene Bahn vorliegt kommen für die Erwärmung viele Verfahren in Betracht, wie bspw. eine Kontakterwärmung, eine Erwärmung mittels Infrarotstrahlern, Ultraschallstrahlern, Induktionsstrahlern und/oder Mikrowellenstrahlern. Eine Kontakterwärmung kann bspw. über entsprechend ausgestattete Förderbänder erfolgen. Bei der Erwärmung mit Ultraschall kann es sinnvoll sein, das Folienmaterial mit geeigneten Suszeptoren auszustatten, welche die Absorptionseigenschaften gegenüber der einwirkenden Strahlung und damit die Wärmeentwicklung im Folienmaterial verbessern oder erst ermöglichen. Auch der Einsatz von infraroter Strahlung, Induktionsstrahlung oder Mikrowellenstrahlung kann die Ausstattung der Folie mit entsprechend geeigneten Suszeptoren erfordern, da das Absorptionsvermögen von Folie aus Polyethylen gegenüber infraroter Strahlung, Mikrowellenstrahlung und/oder Induktionsstrahlung sehr gering ist. Die Absorptionsfähigkeit kann jedoch mit geeigneten Suszeptoren im Material deutlich verbessert werden. Bei niederfrequenter Induktionsstrahlung sind dagegen Suszeptoren unverzichtbar, da ansonsten die Folie nicht erwärmt werden kann.Since the film is present in the film wrapping module as a flat web for heating many methods into consideration, such as, a contact heating, heating by means of infrared radiators, ultrasonic radiators, induction heaters and / or microwave radiators. A contact heating can, for example, be done via appropriately equipped conveyor belts. When heating with ultrasound, it may be useful to provide the film material with suitable susceptors, which improve the absorption properties against the applied radiation and thus the heat development in the film material or only allow. Also, the use of infrared radiation, induction radiation or microwave radiation may require the equipment of the film with correspondingly suitable susceptors, since the absorption capacity of the film of polyethylene to infrared radiation, microwave radiation and / or induction radiation is very low. However, the absorbency can be significantly improved with suitable susceptors in the material. In contrast, susceptors are indispensable for low-frequency induction radiation since otherwise the film can not be heated.
Grundsätzlich ist die Temperierungseinrichtung so nahe wie möglich am Folienauftauchpunkt zu platzieren. Weiterhin kann vorgesehen sein, dass sich die Temperierungseinrichtung über zumindest einen Transportabschnitt für die Folienzuschnitte erstreckt und/oder zumindest einen Teil der Zuschnitttransporteinrichtung zwischen der Schneideinrichtung und der Übergabestelle zur Folieneinschlagvorrichtung bildet. Dabei kann die Zuschnitttransporteinrichtung bspw. durch wenigstens ein mit Unterdruck beaufschlagbares Förderband gebildet sein. Wahlweise kann die Temperierungseinrichtung zumindest einen Abschnitt des Förderbandes umfassen und/oder mit diesem baulich vereinigt bzw. dort integriert sein. Die Zuschnitttransporteinrichtung kann bspw. auch durch wenigstens ein beheizbares Förderband gebildet sein. Die Länge der Folienheizvorrichtung kann so gewählt werden, dass sie zwischenVakuumförderband und Folienauftauchpunkt liegt, dass sie einen Teil des Vakuumförderbandes ersetzt oder dass sie das gesamte Vakuumförderband ersetzt, was jedoch nur bei einer Kontaktbeheizung mit einer Raupe möglich ist.In principle, the tempering device should be placed as close as possible to the film dipping point. Furthermore, it can be provided that the tempering device extends over at least one transport section for the film blanks and / or forms at least part of the blank transport device between the cutting device and the transfer point to the film wrapping device. In this case, the blank transport device can be formed, for example, by at least one vacuum belt which can be acted upon by negative pressure. Optionally, the Temperature control comprise at least a portion of the conveyor belt and / or structurally combined or integrated there. The blank transport device may, for example, also be formed by at least one heatable conveyor belt. The length of the film heater may be selected to be between the vacuum belt and film platen, to replace part of the vacuum belt, or to replace the entire vacuum belt, but this is only possible with contact heating with a bead.
Gegenüber den bisher bekannten Vorwärmeinrichtungen, bei denen das Heizmodul in einiger Entfernung vom Folienauftauchpunkt und zudem in Transportrichtung der Folie vor dem Schneidmodul angeordnet ist, weist die Erfindung erhebliche Vorteile auf. So kann bei den bekannten taktenden Anlagen die Folienbahn nach dem Ablängen angehalten und erst wieder nach dem Abziehen des Folienzuschnittes angefahren werden. Da sich die stillstehende Folie im thermischen Eingriff mit der Heizeinrichtung befindet, erwärmt sie sich wesentlich stärker als eine kontinuierlich durch die beheizte Zone bewegte Folie. Speziell die bekannten Varianten, die mit Heizwalzen arbeiten, aber auch die Varianten mit Heißluftbeaufschlagung und Infrarot sind relativ träge, so dass ein Anhalten der Folie kaum ausgeregelt werden kann. Noch problematischer wird die Situation bei häufigem Anhalten der Folienförderung auf Grund von Störungen oder "stop and go"-Betrieb. Im Gegenzug kühlt bei einem Anhalten der Folie die Folienbahn, welche sich nach der Heizvorrichtung befindet, unkontrolliert bis auf Raumtemperatur ab. Ein definierter und vor allem homogener Aufheizvorgang kann daher auch bei störungsfreiem Betrieb kaum gewährleistet werden. Alle diese erwähnten Probleme beseitigt die Erfindung, da die Folienschneidvorrichtung vor der Aufheizvorrichtung liegt. Auf diese Weise kann zuverlässig gewährleistet werden, dass der in der Aufheizvorrichtung befindliche Folienrapport oder Folienzuschnitt auch bei einem Maschinenstopp freigefahren werden kann. Sinnvollerweise kann durch eine entsprechende Maschinensteuerung auch dafür gesorgt werden, dass keine bereits eingeschlagenen Pakete auf dem Fördertisch stehen bleiben.Compared to the previously known preheating devices, in which the heating module is arranged at some distance from the film dipping point and also in the transport direction of the film in front of the cutting module, the invention has considerable advantages. Thus, in the case of the known clocking systems, the film web can be stopped after being cut to length and can only be approached again after the film blank has been removed. Since the stationary film is in thermal engagement with the heater, it heats up much more than a film moving continuously through the heated zone. Specifically, the known variants that work with heat rollers, but also the variants with Heißluftbeaufschlagung and infrared are relatively sluggish, so that stopping the film can hardly be compensated. Even more problematic is the situation with frequent stopping of the film promotion due to disturbances or "stop and go" operation. In return, when the film stops, the film web, which is located after the heating device, cools down in an uncontrolled manner to room temperature. A defined and above all homogeneous heating process can therefore hardly be guaranteed even with trouble-free operation. All of these mentioned problems are eliminated by the invention, since the film cutting device is located in front of the heating device. In this way it can be reliably ensured that the film repeat or foil blank located in the heating device can also be freed during a machine stop. It makes sense to be ensured by a corresponding machine control also ensure that no already taken packages remain on the conveyor table.
Zudem hat es sich gezeigt, dass sich warme Folien im Folienschneidmodul sehr schlecht verarbeiten lassen, da sie im warmen Zustand weicher und zäher sind und sich daher nicht so gut schneiden lassen wie kalte und somit steifere bzw. härtere Folien. Dies ist ein weiterer Grund dafür, dass die Aufheizvorrichtung nach der Schneidvorrichtung zu platzieren ist. Weiterhin werden auf diese Weise zu lange Lauflängen nach der Aufheizvorrichtung vermieden. Die Aufheizvorrichtung befindet sich erfindungsgemäß unmittelbar vor dem Folieneinschlagmodul. Idealerweise muss die Folie im Auftauchpunkt zur Produktbahn die Heizung verlassen, um die Abkühlstrecke bis zum nachgeschalteten Schrumpftunnel so kurz wie möglich zu halten, auch um so wenig Maschinenteile wie möglich unnötig zu erwärmen.In addition, it has been shown that warm foils in the foil cutting module can be processed very poorly, since they are softer and tougher when warm and therefore can not be cut as well as cold and thus stiffer or harder foils. This is another reason that the heating device must be placed after the cutting device. Furthermore, too long run lengths after the heating device are avoided in this way. The heating device is according to the invention immediately before the film wrapping module. Ideally, the foil needs to be in the point of emergence leave the heater to the product line to keep the cooling section to the downstream shrink tunnel as short as possible, also to heat as few machine parts as possible unnecessarily.
Weiterhin weist die Erfindung den Vorteil auf, dass die Wärmezufuhr gut moduliert und gesteuert werden kann. Der Wärmeeintrag kann somit an unterschiedliche Fördergeschwindigkeiten für die Artikel und die Folie angepasst werden. Zudem kann die Wärmezufuhr bei Bedarf sehr schnell abgeschaltet werden, insbesondere bei einem Maschinenstopp.Furthermore, the invention has the advantage that the heat input can be well modulated and controlled. The heat input can thus be adapted to different conveying speeds for the article and the film. In addition, the heat can be switched off very quickly if needed, especially at a machine stop.
Bekannte Problemzonen beim Schrumpfen sind Bereiche des Gebindes, die nicht an einer Flasche, einem Behälter oder Artikel anliegen. In diesen Bereichen wird die Folie nicht vom Gebindeinhalt gekühlt und es kann leichter zu Lochbildungen an der Folie kommen. Diese Bereiche können bei Bedarf von der Vorwärmung ausgenommen werden. Wahlweise kann es auch sinnvoll sein, die Folie über ihre Breite individuell zu erwärmen, bspw. durch Einteilung der Heizeinrichtung in unterschiedliche Heizzonen, so dass den jeweiligen Heizerfordernissen unterschiedlicher Folienbereiche eines Zuschnittes besser Rechnung getragen werden kann. So kann es bspw. sinnvoll sein, drei, vier oder mehr Zonen über die Folienbreite zu definieren und bspw. nur die Randbereiche stärker zu erwärmen (z.B. ca. 70 °C) als die mittleren Bereiche (z.B. ca. 50 °C).Known problem areas when shrinking are areas of the container, which are not applied to a bottle, a container or article. In these areas, the film is not cooled by the container contents and it can be easier to form holes on the film. These areas can be exempted from preheating if necessary. Optionally, it may also be useful to heat the film individually over its width, for example. By dividing the heater into different heating zones, so that the respective Heizerfordernissen different film areas of a blank can be better taken into account. For example, it may be useful to define three, four or more zones across the film width and, for example, to more strongly heat only the edge regions (e.g., about 70 ° C) than the central regions (e.g., about 50 ° C).
Weiterhin umfasst die vorliegende Erfindung ein Verfahren zur Verpackung von Gebinden oder Artikelgruppen mit unter Wärmeinwirkung schrumpfbarer Folie, wobei die Gebinde oder Artikelgruppen auf einer Horizontalfördereinrichtung stehend oder liegend in Richtung einer Schrumpfstation transportiert und in Transportrichtung mittels einer Folieneinschlagvorrichtung mit einem Folienzuschnitt definierter Länge eingeschlagen werden. Die abgelängten Folienzuschnitte werden vor ihrer Übergabe an die Folieneinschlagvorrichtung auf eine erhöhte Temperatur, die unterhalb der folienspezifischen Erweichungs- und/oder der Schrumpfungstemperatur liegt, erwärmt. Zudem erfolgt die Erwärmung der Folienzuschnitte nach ihrer Ablängung durch Zerschneiden quer zur Folientransportrichtung und vor ihrer Übergabe an die Folieneinschlagvorrichtung. Gemäß der Erfindung werden die Folienzuschnitte lokal begrenzt und unmittelbar vor der Übergabe zur Folieneinschlagvorrichtung erwärmt.Furthermore, the present invention comprises a method for packaging containers or groups of items with shrinkable under heat film, the packages or groups of articles standing on a horizontal conveyor or lying transported in the direction of a shrinking station and are wrapped in the transport direction by means of a film wrapping device with a film blank of defined length. The cut-to-size film blanks are heated to an elevated temperature below the film-specific softening and / or shrinkage temperature prior to their transfer to the film wrapping device. In addition, the heating of the film blanks takes place after their cutting by cutting transversely to the direction of film transport and before their transfer to the film wrapping device. According to the invention, the film blanks are localized and heated immediately prior to transfer to the film wrapping device.
Eine optionale Ausstattung der erfindungsgemäßen Folienvorwärmung kann eine Temperaturregelung vorsehen, bei der die Folientemperaturen an verschiedenen Stellen gemessen und die Heizeinrichtung entsprechend nach Bedarf geregelt werden kann. So kann bspw. die Folientemperatur der von einem Endlosvorrat entnommenen Folie gemessen werden, um die Umgebungs- bzw. Ausgangstemperatur zu erfassen. Nach Passieren der Temperierungseinrichtung kann eine weitere Messung erfolgen, bspw. durch optische Sensoren, um eine Regelgröße zur Regelung der Heizintensität zu gewinnen. Darüber hinaus ist es denkbar, Kontrollmessungen im Bereich zwischen Folieneinschlagmodul und Schrumpfstation und/oder in der Schrumpfstation oder nach dieser durchzuführen. Einerseits kann damit die Regelung feinfühlig angepasst werden. Zudem können Überhitzungen der Folie, auch lokaler Art, zuverlässig verhindert werden.An optional equipment of the film preheating invention may provide a temperature control, in which the film temperatures measured at different locations and the heater can be controlled according to need. So For example, the film temperature of the film taken from an endless supply can be measured in order to detect the ambient or exit temperature. After passing through the tempering device, a further measurement can take place, for example by optical sensors, in order to obtain a controlled variable for controlling the heating intensity. In addition, it is conceivable to carry out control measurements in the area between the film wrapping module and the shrinking station and / or in the shrinking station or after this. On the one hand, the control can be sensitively adjusted. In addition, overheating of the film, even local type, can be reliably prevented.
Im Folgenden sollen Ausführungsbeispiele die Erfindung und ihre Vorteile anhand der beigefügten Figuren näher erläutern. Die Größenverhältnisse der einzelnen Elemente zueinander in den Figuren entsprechen nicht immer den realen Größenverhältnissen, da einige Formen vereinfacht und andere Formen zur besseren Veranschaulichung vergrößert im Verhältnis zu anderen Elementen dargestellt sind.
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Fig. 1 zeigt eine schematische Seitenansicht einer Ausführungsvariante eines Verpackungsmoduls. -
Fig. 2 zeigt eine schematische Seitenansicht einer ersten Ausführungsvariante des Verpackungsmoduls mit Strahlern in einem Heizbereich. -
Fig. 3 zeigt eine weitere schematische Seitenansicht einer zweiten Ausführungsvariante des Verpackungsmoduls mit Förderbändern im Heizbereich. -
Fig. 4 zeigt eine weitere schematische Seitenansicht einer dritten Ausführungsvariante des Verpackungsmoduls. -
Fig. 5 zeigt eine schematische Detaildarstellung einer Variante eines Heizbereichs. -
Fig. 6 zeigt eine schematische Detaildarstellung einer weiteren Variante eines Heizbereichs. -
Fig. 7 zeigt eine Variante mit Mehrzonenheizung bei umlaufenden Heizbändern in einer Seitenansicht sowie einer Draufsicht. -
Fig. 8 zeigt eine weitere Variante mit Mehrzonenheizung bei berührungslos arbeitenden Strahlern (die Strahlung kann Ultraschall, Mikrowelle oder Induktion umfassen) in einer Seitenansicht sowie einer Draufsicht.
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Fig. 1 shows a schematic side view of an embodiment of a packaging module. -
Fig. 2 shows a schematic side view of a first embodiment of the packaging module with radiators in a heating area. -
Fig. 3 shows a further schematic side view of a second embodiment of the packaging module with conveyor belts in the heating area. -
Fig. 4 shows a further schematic side view of a third embodiment of the packaging module. -
Fig. 5 shows a schematic detail of a variant of a heating area. -
Fig. 6 shows a schematic detail of a further variant of a heating area. -
Fig. 7 shows a variant with multi-zone heating with circulating heating bands in a side view and a plan view. -
Fig. 8 shows a further variant with multi-zone heating at non-contact radiators (the radiation may include ultrasound, microwave or induction) in a side view and a plan view.
Für gleiche oder gleich wirkende Elemente der Erfindung werden identische Bezugszeichen verwendet. Ferner werden der Übersicht halber nur Bezugszeichen in den einzelnen Figuren dargestellt, die für die Beschreibung der jeweiligen Figur erforderlich sind. Die dargestellten Ausführungsformen stellen lediglich Beispiele dar, wie die erfindungsgemäße Vorrichtung oder das erfindungsgemäße Verfahren ausgestaltet sein können und stellen keine abschließende Begrenzung dar.For identical or equivalent elements of the invention, identical reference numerals are used. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures, which are required for the description of the respective figure. The illustrated embodiments are merely examples of how the device or method of the invention may be configured and are not an exhaustive limitation.
Die schematischen Seitenansichten der
Im Verpackungsmodul 8 wird die von der Folienrolle 14 abgerollte Folie 12 über einen Folienspeicher 26, bspw. einen sog. Tänzer, als Endlosfolienbahn 12 zu einer Umlenkung 28 mit einer darin integrierten Folienschneideinrichtung 30 und von dort zu einer der Schneideinrichtung 30 nachgeordneten Folientransport- und Zuführeinrichtung 32 zur Förderung der abgelängten Folienzuschnitte 24 zur Folieneinschlagvorrichtung 22 geführt. Der Folientransport- und Zuführeinrichtung 32 ist gemäß der vorliegenden Erfindung eine Temperierungseinrichtung 34 zur Temperierung der Folienzuschnitte 24 auf eine erhöhte Temperatur zugeordnet. Die von der Temperierungseinrichtung 34 erzeugte erhöhte Temperatur liegt unterhalb einer folienspezifischen Erweichungs-und/oder Schrumpfungstemperatur. Wie anhand der in den
Im dargestellten Verpackungsmodul 8 erfolgt die Zuführung der schrumpfbaren Folie 12 vom Endlosvorrat der Folienrolle 14 zum Folieneinschlagmodul 22, wobei die abgelängte und in Folienzuschnitte 24 zerteilte Folie 12 an der Übergabestelle 36 von unten durch einen Spalt bzw. eine Lücke (nicht dargestellt) in der Horizontalfördereinrichtung 18 schräg nach oben zugeführt und mittels des Folieneinschlagmoduls 22 während des kontinuierlichen Transports der einzuschlagenden Gebinde 10 oder Artikelgruppen um diese geschlagen wird. Das Folieneinschlagmodul 22 weist umlaufende Einschlagstäbe (nicht dargestellt) auf, die seitlich an endlos umlaufenden Zugmitteln 38 wie Ketten geführt sind. Die Temperierung der Folie 12 auf die gewünschte Temperatur erfolgt nach dem Schneiden der Folienzuschnitte 24, jedoch vor der Übergabe an das Einschlagmodul 22, wodurch die Platzierung der Temperierungseinrichtung 34 auf einen Bereich zwischen dem Schneidmodul 30 und knapp vor der Übergabe an das Einschlagmodul 22 und damit auf den in
Das gezeigte Verpackungsmodul 8 ermöglicht es, die Folie 12 bereits im Folieneinschlagmodul 22 so weit wie möglich zu erwärmen, wodurch in kurzer Zeit eine gewünschte Eingangstemperatur der Folie für den Schrumpfprozess erzielbar ist. Diese sog. "Schrumpfstarttemperatur" kann bei den derzeit verfügbaren und normalerweise eingesetzten Folien 12 aus Polyethylen oberhalb von ca. 90 °C und unterhalb von ca. 120 °C liegen. Die Erwärmung erfolgt kurz vor dem Auftauchpunkt bzw. der Übergabestelle 36 der Folienzuschnitte 24 und direkt vor dem Einschlagvorgang des Packgutes, wodurch die vorgewärmte Folie 12 bis zum Erreichen des Schrumpftunnels nur relativ wenig Temperatur verliert. Wie in der
Während die Temperierungseinrichtung 34 im Heizbereich 40 in der Darstellung der
Die schematische Seitenansicht der
Die schematische Seitenansicht der
Wie anhand der schematischen Detaildarstellungen der
In der Praxis können beim Schrumpfvorgang Probleme in Bereichen des Gebindes 10 entstehen, bei denen die Folienzuschnitte 24 nach dem Einschlagvorgang nicht oder nur unzureichend an einer Flasche, einem Behälter oder Artikel anliegen. In diesen Bereichen wird die Folie nicht vom Gebindeinhalt gekühlt und es kann leichter zu Lochbildungen an der Folie kommen. Diese Bereiche können bei Bedarf von der Vorwärmung ausgenommen werden. Wahlweise kann es somit gemäß
So kann es bspw. sinnvoll sein, gemäß
Vorzugsweise umfasst die erfindungsgemäße Folienvorwärmung eine Temperaturregelung, bei der die Folientemperaturen an verschiedenen Stellen des Folientransports und/oder des Gebindetransports gemessen und die Temperierungseinrichtung 34 nach Bedarf geregelt werden kann. So kann bspw. die Folientemperatur der vom Endlosvorrat 14 entnommenen Folie 12 gemessen werden, um die Umgebungs- bzw. Ausgangstemperatur zu erfassen. Nach Passieren der Temperierungseinrichtung 34 kann eine weitere Messung erfolgen, bspw. durch optische Sensoren, um eine Regelgröße zur Regelung der Heizintensität zu gewinnen. Darüber hinaus ist es denkbar, Kontrollmessungen im Bereich zwischen Folieneinschlagmodul 22 und Schrumpfstation und/oder in der Schrumpfstation oder nach dieser durchzuführen. Einerseits kann damit die Regelung feinfühlig angepasst werden. Zudem können Überhitzungen der Folienzuschnitte 24, auch lokaler Art, zuverlässig verhindert werden.The film preheating according to the invention preferably comprises a temperature control in which the film temperatures are measured at different locations of the film transport and / or the package transport and the
Die Erfindung wurde unter Bezugnahme auf eine bevorzugte Ausführungsform beschrieben. Es ist jedoch für einen Fachmann vorstellbar, dass Abwandlungen oder Änderungen der Erfindung gemacht werden können, ohne dabei den Schutzbereich der nachstehenden Ansprüche zu verlassen.The invention has been described with reference to a preferred embodiment. However, it will be apparent to those skilled in the art that modifications or changes may be made to the invention without departing from the scope of the following claims.
- 88th
- Verpackungsmodulpackaging module
- 1010
- Gebindecontainer
- 1212
- Folie, SchrumpffolieFoil, shrink wrap
- 1414
- Folienrolle, FolienvorratFilm roll, film supply
- 1616
- Transportbandconveyor belt
- 1818
- HorizontalfördereinrichtungHorizontal conveyor
- 2020
- Transportrichtungtransport direction
- 2222
- FolieneinschlagvorrichtungFilm wrapping device
- 2424
- Folienzuschnittfilm blank
- 2626
- Folienspeicher, TänzerFoil storage, dancers
- 2828
- Umlenkungredirection
- 3030
- FolienschneideinrichtungFoil cutter
- 3232
- Folientransport-/Zuführeinrichtung,Film transport / feed device,
- 3434
- Temperierungseinrichtungtempering
- 3636
- ÜbergabestelleTransfer point
- 3838
- Zugmitteltraction means
- 4040
- Heizbereichheating
- 4242
- Strahler, HeizstrahlerSpotlights, radiant heaters
- 4444
- VakuumförderbandVacuum conveyor belt
- 4646
- HeizungsbandHeating tape
- 4848
- Förderband, beheizbares FörderbandConveyor belt, heated conveyor belt
- 5050
- Isolierung, SystemgrenzeInsulation, system limit
- 5252
- Heizzoneheating zone
- 52a, 52b, 52c, 52d52a, 52b, 52c, 52d
- Heizzonenheating zones
- 5454
- Heizzoneheating zone
- 54a, 54b, 54c, 54d54a, 54b, 54c, 54d
- Heizzonenheating zones
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011013117A DE102011013117A1 (en) | 2011-03-04 | 2011-03-04 | Packaging module for packs or groups of articles to be wrapped with packaging and / or under heating shrinkable shrink film |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2495178A1 true EP2495178A1 (en) | 2012-09-05 |
EP2495178B1 EP2495178B1 (en) | 2013-03-20 |
Family
ID=45655444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120154440 Active EP2495178B1 (en) | 2011-03-04 | 2012-02-08 | Packaging module for containers or groups of items to be surrounded with packaging film and/or shrink film that shrinks under heat |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2495178B1 (en) |
CN (1) | CN102653321B (en) |
DE (1) | DE102011013117A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2730515A1 (en) * | 2012-11-09 | 2014-05-14 | Krones Aktiengesellschaft | Shrink packaging and device and method for producing the same |
IT201600124800A1 (en) * | 2016-12-12 | 2018-06-12 | Baumer Srl | PACKING MACHINE SYSTEM |
IT201600124781A1 (en) * | 2016-12-12 | 2018-06-12 | Baumer Srl | METHOD FOR PACKAGING |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018128351B3 (en) | 2018-11-13 | 2020-02-20 | Khs Gmbh | Device and method for wrapping groups of containers |
DE102019104112A1 (en) * | 2019-02-19 | 2020-08-20 | Krones Aktiengesellschaft | Packaging line; Transport device and method for adapting a packaging system |
DE102020131190A1 (en) | 2020-11-25 | 2022-05-25 | Krones Aktiengesellschaft | Transport device, packaging system and method for adapting or retrofitting a transport device |
DE102021133836A1 (en) | 2021-12-20 | 2023-06-22 | Krones Aktiengesellschaft | Device and method for preparing flat blanks for the respective packaging of several articles |
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Also Published As
Publication number | Publication date |
---|---|
EP2495178B1 (en) | 2013-03-20 |
CN102653321B (en) | 2015-02-25 |
CN102653321A (en) | 2012-09-05 |
DE102011013117A1 (en) | 2012-09-06 |
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