EP2384982B1 - Method for operating a thermoform packaging machine and corresponding machine - Google Patents

Method for operating a thermoform packaging machine and corresponding machine Download PDF

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Publication number
EP2384982B1
EP2384982B1 EP11003720.7A EP11003720A EP2384982B1 EP 2384982 B1 EP2384982 B1 EP 2384982B1 EP 11003720 A EP11003720 A EP 11003720A EP 2384982 B1 EP2384982 B1 EP 2384982B1
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EP
European Patent Office
Prior art keywords
cover film
film
packaging
gas
sealing station
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.)
Revoked
Application number
EP11003720.7A
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German (de)
French (fr)
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EP2384982A1 (en
Inventor
Bernhard Grimm
Tieme Jan Slomp
Dieter Holzem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
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Multivac Sepp Haggenmueller GmbH and Co KG
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Publication of EP2384982A1 publication Critical patent/EP2384982A1/en
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Classifications

    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • B65B7/164—Securing by heat-sealing
    • 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
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/025—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers
    • B65B31/028—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers closed by a lid sealed to the upper rim of the container, e.g. tray-like container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
    • B65B9/045—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material for single articles, e.g. tablets

Definitions

  • the invention relates to a method for operating a packaging machine and to a packaging machine itself.
  • a thin top film is heated in a sealing station of a thermoforming packaging machine and placed the heated film over the product. During the evacuation process and then due to the pressure difference to the atmosphere, this film engages closely and gently on the product. This is only possible with evacuated packs. However, it is neither possible nor desirable for many products to contact the products with a heated top film as this negatively affects the cooling time, shelf life and appearance of the product.
  • Packaging in which a cover film is deformed in such a way that it is shaped in the direction of the package bottom and thus provides a further space in relation to the sealing plane which can be filled with further products, in which case a second cover film usually appears in printed form the packaging is just sealed.
  • the shaped cover foil offers a higher stability of the whole
  • Packaging and a good reclosability of the packaging after removing products from the lower packaging space and reclosing this space
  • the object of the present invention is to provide a method for operating a packaging machine in which the disadvantages described above can be met.
  • the method also includes forming the first dowel sheet before feeding it into the first sealing station so that the heating of the lid sheet necessary for deformation can cool back to the extent that the food, which is preferably cold or cool in the contact, is not heated.
  • a second lidding film may be fed after the first sealing station in a second sealing station to be welded in the second sealing station to the first lidding film and / or the packing trough or fed into a common sealing station with the first formed lidding film.
  • the space between the molded lid foil and the second lid foil can be evacuated and / or gassed.
  • the inventive method preferably has a control that controls the amount of gas or gas mixture and / or the pressure inside the package in which the food is located and by means of which the parameters gas pressure or gas quantity are also adjustable.
  • the distance between the bottom of the molded lidding film to the packing tray would be less than the product height. This overlap leads to a pressing force of the cover film on the product and thus to a fixation of the product within the package without exchange of atmosphere inside the package.
  • an atmosphere exchange by evacuation and gassing it is possible to control the amount of gas or the gas pressure inside the package so that the molded lidding film is not raised so much that the effect of a force on the product is reduced too much, while extending the shelf time.
  • the shaped lidding film is preferably made in a thickness in a range of 70 ⁇ m to 120 ⁇ m in order to increase the properties of the packaging container according to the invention, such as fixation of the product in the pack the top of the product and fixation of the product additives lying on the product. It is also conceivable film thickness outside the specified range, if the films are formed as multilayer films and thus appropriate properties such as flexibility can be specially selected.
  • a second lidding film can also be applied, which is preferably sealed in the sealing plane with the packing trough and the first lidding foil.
  • This film can be made in a printed version, which displays information about the inside food, and is also suitable for applying labels or printing e.g. the expiration date.
  • the thus existing second space between the first and second cover film can be evacuated and / or gassed and filled with other products.
  • the packaging container preferably has a pack bottom suitably shaped for this purpose.
  • a pack bottom suitably shaped for this purpose.
  • FIG. 1 shows a schematic view of a thermoforming packaging machine 1.
  • This has a forming station 2, a first sealing station 3, a second sealing station 4, a cross-cutting device 5 and Lssenssehneide Surprise 6, which are arranged in this order in a direction R on a machine frame 7.
  • a feed roller 8 On the input side is located on the machine frame 7, a feed roller 8, from which a lower film 9 is withdrawn.
  • a packing trough 10 is formed in the lower film 9.
  • a material reservoir 10 is provided, of which a first lid film 11 is deducted. Before the first cover film 11 is fed into the first sealing station 3, the first cover film 11 is formed in a cover film forming station 12.
  • a second cover film 13 is withdrawn from a material storage 14 and fed to the second sealing station 4 and sealed in this station to the lower film 9 and / or first cover film 11.
  • a discharge device 15 in the form of a conveyor belt is provided on the packaging machine 1, with the finished individualized packages 16 being transported away. Furthermore, the packaging machine 1, a feed device, not shown, which engages the first web-shaped material 9 side and further transported in the main working cycle in cycles in the direction of R.
  • the feed device may e.g. be realized by laterally arranged transport chains.
  • the first lid sheet 11 is formed so that the molded surface when feeding into the first sealing station 3 to the product 18 and also comes with this contact.
  • FIG. 2 is a plan view of a package produced by the process according to the invention shown.
  • product 18 eg pizza
  • other small product additives 19 eg topping such as cheese, salami, ham, etc.
  • the first molded lidding film 11 and the second lidding film 13 are sealed to the lower film 9 formed into a packing tray 10 by means of a sealing seam 20.
  • a partially (straight) edge 21 is provided on one side of the package 16.
  • the first molded cover film 13 is deep-drawn in parallel in the region of the package bottom, so that an edge 22 is formed.
  • Belde mutually parallel edges 21, 22 form the footprint for a standing package 16th
  • FIG. 3 shows the plane 23 of the first shaped lidding film 11 and the top level 24 of the product 18 with the product additives 19.
  • the plane 23 is below the level 24. This ensures that the lidding film 11 with the product 18, 19 in Contact is because the cover film, when it is designed as a plastic film with a thickness of less than 120 ⁇ m, grants flexibility similar to a skin film and also partially rests on the product edge. This leads to a fixation of the product 18, 19 within the packing trough 10 and can over the transport of the package 16 beyond a constant distance from the product 18, 19 to the inside of the packaging container guarantee.
  • a second component of the pressing force is generated via the external atmospheric pressure with respect to the vacuum present in the package interior 25.
  • the space 25 between the packing trough 10 and the shaped lidding film 11 is evacuated and then fumigated again, so that the shaped lidding film 11 exerts a desired pressing force F on the product 18, 19.
  • This force F is metered via the amount of gas or the gas pressure in the space 25 by means of a (not shown) control, preferably the machine control.
  • the necessary parameters can be entered and stored by the operating personnel via an input unit (not shown) in the controller.
  • machine settings for different products and production processes can be stored in recipes.
  • the second cover film 13 is preferably applied flat on both films 9 and 11 and sealed with two films 9, 11. It is preferably colored to provide information on the product 18, 19 and / or to provide an area for labels 27 to be applied.
  • the properties of the first and second lidding sheets 11, 13 may be different.
  • the first cover sheet 11 is executed in a first embodiment without a barrier layer and the second cover sheet 13 is made airtight.
  • the space 26 can be gassed between the two lidding films 11, 13 in order to increase the pressure force F of the first lidding film 11 on the product 18, 19 and thus better control or control the desired pressing force F.
  • the packaging according to the invention does not include a second cover film 13.
  • the first cover film 11 is preferably made airtight with a barrier layer. Labeling and / or printing can also be carried out on the underside of the package bottom.
  • the lidding film 11 is formed deeper than the product height (level 24) and is applied to the top of the product 18, 19 and thereby fixes the product additives 19, so that it in a, as in FIG. 4 shown, standing position of the package does not lead to a change in position of the product additives 19 on the product 18.
  • FIG. 4 is also through the edge 21 of the pack edge and the edge 22nd the bottom of the pack defined stand area shown.
  • the edge 22 may also be partially or entirely formed as a surface in order to maximize the stability.
  • the packaging container 16 is optimally displayed in a display shelf in retail markets to advertise with the on the second cover sheet 13 and attract the attention of the customer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Vacuum Packaging (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zum Betrieb einer Verpackungsmaschine sowie auf eine Verpackungsmaschine selbst.The invention relates to a method for operating a packaging machine and to a packaging machine itself.

Bei Produkten, auf denen sich weitere, meist kleinere lose Produktzusätze befinden, wie dies bei einer Pizza der Fall ist, und die in Kühltruhen oder Kühlregalen zum Verkauf angeboten werden, ist es üblich, dass diese Produkte in einer Folie unter Vakuum verpackt werden. Diese Art der Folienverpackung ermöglicht zum Einen eine längere Haltbarkeit des Produktinhaltes aufgrund des geringen Restsauerstoffes durch das Evakuieren und zum Anderen durch das enge Anliegen der Folie an dem Produkt, dass beispielsweise bei einer Pizza der Belag, bestehend aus vielen kleinen Produkten, fixiert ist, so dass dieser beim Transport nicht verrutschen kann und das Produkt seine gewünschte optisch ansprechende Form behält. Diese Fixierung durch das Anliegen der Folie wird durch einen hohen Druckunterschied zur Atmosphäre bewirkt.For products containing more, usually smaller, loose product additives, such as pizza, and offered for sale in freezers or refrigerated shelves, it is common for these products to be packaged in a vacuum film. This type of film packaging allows for a longer shelf life of the product content due to the low residual oxygen by evacuating and on the other by the close concern of the film on the product that, for example, in a pizza, the coating is fixed, consisting of many small products, so that this can not slip during transport and the product retains its desired visually appealing shape. This fixation by the concerns of the film is caused by a high pressure difference to the atmosphere.

Speziell bei Skin-Verpackungen, wie in WO 87/02965 A1 und US 5 323 590 A offenbart, wird eine dünne Oberfolie in einer Siegelstation einer Tiefziehverpackungsmaschine erwärmt und die erwärmte Folie über das Produkt gelegt. Beim Evakuiervorgang und anschließend aufgrund der Druckdifferenz zur Atmosphäre legt sich diese Folie eng und schonend an das Produkt an. Dies ist nur bei evakuierten Packungen möglich. Es ist aber bei vielen Produkten weder möglich noch erwünscht, die Produkte mit einer erwärmten Oberfolie in Kontakt zu bringen, da dies die Kühlzeit, die Haltbarkeit und das Aussehen des Produktes negativ beeinflusst.Especially for skin packaging, such as in WO 87/02965 A1 and US 5,323,590 A discloses a thin top film is heated in a sealing station of a thermoforming packaging machine and placed the heated film over the product. During the evacuation process and then due to the pressure difference to the atmosphere, this film engages closely and gently on the product. This is only possible with evacuated packs. However, it is neither possible nor desirable for many products to contact the products with a heated top film as this negatively affects the cooling time, shelf life and appearance of the product.

Um die Haltbarkeit eines Produktes wie Pizza deutlich zu verlängern, ist es denkbar, das Innere der Verpackung nach dem Stand der Technik zu evakuieren und anschließend mit einem Gasgemisch wie Stickstoff und Kohlendioxid zu begasen. Dies führt aber zu einer Verpackung, die nicht mehr eng am Produkt anliegt und damit die Funktion der Fixierung des Produktes mit dem Belag wie bei einer Pizza nicht mehr erfüllt.In order to significantly extend the shelf life of a product such as pizza, it is conceivable to evacuate the interior of the packaging according to the prior art and then to treat it with a gas mixture such as nitrogen and carbon dioxide. However, this leads to a packaging that is no longer close to the product and thus no longer fulfills the function of fixing the product with the coating as in a pizza.

Es sind Verpackungen bekannt, bei denen eine Deckelfolie so verformt wird, dass diese in Richtung Packungsboden geformt ist und somit einen weiteren Raum gegenüber der Siegelebene zur Verfügung stellt, der mit weiteren Produkten befüllt werden kann, wobei anschließend eine zweite Deckelfolie meist in bedruckter Form auf die Verpackung eben aufgesiegelt wird. Die geformte Deckelfolie bietet hierbei eine höhere Stabilität der gesamtenPackaging is known in which a cover film is deformed in such a way that it is shaped in the direction of the package bottom and thus provides a further space in relation to the sealing plane which can be filled with further products, in which case a second cover film usually appears in printed form the packaging is just sealed. The shaped cover foil offers a higher stability of the whole

Verpackung und eine gute Wiederverschließbarkeit der Verpackung nach der Entnahme von Produkten aus dem unteren Packungsraum und den Wiederverschluß dieses Raumes.Packaging and a good reclosability of the packaging after removing products from the lower packaging space and reclosing this space.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zum Betrieb einer Verpackungsmaschine zur Verfügung zu stellen, bei dem die vorstehend beschriebenen Nachteile begeitigt werden können.The object of the present invention is to provide a method for operating a packaging machine in which the disadvantages described above can be met.

Diese Aufgabe wird gelöst durch ein Verfahren mit den Merkmalen des Anspruchs 1 bzw. durch eine Verpackungsmaschine nach Anspruch 7. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by a method having the features of claim 1 or by a packaging machine according to claim 7. Advantageous developments of the invention are specified in the subclaims.

Das erfindungsgemäße Verfahren zum Betrieb auf einer Tiefziehverpackungsmaschine beinhaltet folgende Schritte:

  • Formen einer Packungsmulde in eine erste Folie,
  • Befüllen der Packungsmulde mit einem Lebensmittel,
  • Verformen einer Deckelfolie,
  • Zuführen von Packungsmulde mit Lebensmittel und Deckelfolie in die Siegelstation,
  • Evakuieren des Raumes zwischen Packungsmulde und Deckelfolie, Begasen des Raumes zwischen Packungsmulde und Deckelfolie,
  • Verschließen der Deckelfolie mit der Packungsmulde zu einer Verpackung,
  • dadurch gekennzeichnet, dass das Verformen der Deckelfolie vor dem Zuführen der Deckelfolie in eine Siegelstation erfolgt,
  • dass die Deckelfolie in bereits verformtem Zustand in die Siegelstation zugeführt wird,
  • und dass das Begasen des Raumes zwischen Packungsmulde und Deckelfolie mit einstellbarem Druck durch Gas oder Gasgemisch derart erfolgt, dass bei einem auf das Verschließen der Deckelfolie mit der Packungsmulde zu einer Verpackung folgenden Belüften der Siegelstation die Deckelfolie eine Kraft (F) auf das Lebensmittel erzeugt.
The method according to the invention for operation on a thermoforming packaging machine comprises the following steps:
  • Forming a packing tray into a first film,
  • Filling the packing tray with a food,
  • Deforming a lidding film,
  • Feeding of packing tray with food and lidding foil into the sealing station,
  • Evacuating the space between the packing tray and lid film, gassing the space between the packing tray and lid film,
  • Closing the lidding film with the packing tray to a packaging,
  • characterized in that the deformation of the cover film takes place prior to feeding the cover film into a sealing station,
  • that the lidding film is fed into the sealing station in an already deformed state,
  • and that the gassing of the space between the packing tray and cover film with adjustable pressure by gas or gas mixture takes place in such a way that the lid film generates a force (F) on the food in the case of a venting of the sealing station following the closure of the lid film with the packing tray.

Das Verfahren beinhaltet auch das (Ver-)Formen der ersten Dockelfolle vor dem Zuführen in die erste Siegelstation, damit die zur Verformung notwendige Erwärmung der Deckelfolie soweit zurückkühlen kann, um das bei dem Kontakt vorzugsweise kalte oder kühle Lebensmittel nicht zu erwärmen.The method also includes forming the first dowel sheet before feeding it into the first sealing station so that the heating of the lid sheet necessary for deformation can cool back to the extent that the food, which is preferably cold or cool in the contact, is not heated.

Eine zweite Deckelfolie kann nach der ersten Siegelstation in einer zweiten Siegelstation zugeführt werden, um in der zweiten Siegelstation mit der ersten Deckelfolie und/oder der Packungsmulde verschweißt zu werden oder in eine gemeinsame Siegelstation mit der ersten geformten Deckelfolie zugeführt zu werden. Dabei kann der Raum zwischen der geformten Deckelfolie und der zweiten Deckelfolie evakuiert und/oder begast werden.A second lidding film may be fed after the first sealing station in a second sealing station to be welded in the second sealing station to the first lidding film and / or the packing trough or fed into a common sealing station with the first formed lidding film. In this case, the space between the molded lid foil and the second lid foil can be evacuated and / or gassed.

Das erfindungsgemäße Verfahren weist vorzugsweise eine Steuerung auf, die die Menge des Gases oder Gasgemisches und/oder den Druck im Packungsinneren, in dem sich das Lebensmittel befindet, steuert und mittels derer die Parameter Gasdruck oder Gasmenge auch einstellbar sind. So kann eine optimale Kombination zwischen erhöhter Haltbarkeit des Lebensmittels durch die Gasmenge bzw. Gasgemisches und einer für das Lebensmittel geeigneten Fixierung durch die Kraft der geformten Deckelfolie auf das Lebensmittel ermöglicht werden, da der Druck im Inneren des Verpackungsbehälters kleiner als der äußere Atmosphärendruck ist.The inventive method preferably has a control that controls the amount of gas or gas mixture and / or the pressure inside the package in which the food is located and by means of which the parameters gas pressure or gas quantity are also adjustable. Thus, an optimum combination between increased shelf life of the food by the amount of gas or gas mixture and a food suitable fixation by the force of the molded lidding film can be made possible on the food, since the pressure inside the packaging container is less than the external atmospheric pressure.

Ein nach dem erfindungsgemäßen Verfahren hergestellter Verpackungsbehälter für Lebensmittel, insbesondere Pizza, mit einer geformten Packungsmulde und einer geformten Deckelfolie, fixiert das Lebensmittel mittels der geformten Deckelfolie und der eingeschlossene Raum ist dabei begast. Dies bietet längere Haltbarkeit des Lebensmittels bei gleichzeitiger Produktfixierung innerhalb des Verpackungsbehälters, um das Lebensmittel nicht nur liegend, sondern auch in einer stehenden Variante in einem Verkaufsbereich präsentieren zu können.A packaging container for foodstuffs, in particular pizza, produced according to the method according to the invention, with a molded packing tray and a shaped lidding film, fixes the food by means of the shaped lidding foil and the enclosed space is fumigated. This provides longer shelf life of the food while fixing the product within the packaging container so as not only to present the food lying down, but also in a standing version in a sales area.

Würde sich kein Produkt in dem Verpackungsbehälter befinden, so wäre der Abstand zwischen dem Boden der geformten Deckelfolie zur Packungsmulde geringer als die Produkthöhe. Diese Überlappung führt ohne Atmosphärenaustausch im Inneren der Packung zu einer Andrückkraft der Deckelfolie auf das Produkt und damit zu einer Fixierung des Produktes innerhalb der Packung. Bei einem Atmosphärenaustausch durch Evakuieren und Begasen ist es möglich, die Gasmenge bzw. den Gasdruck im Inneren der Packung so steuern, dass die geformte Deckelfolie nicht soweit angehoben wird, dass die Wirkung einer Kraft auf das Produkt zu sehr reduziert wird, bei gleichzeitiger Verlängerung der Haltbarkeitszeit.If there were no product in the packaging container, the distance between the bottom of the molded lidding film to the packing tray would be less than the product height. This overlap leads to a pressing force of the cover film on the product and thus to a fixation of the product within the package without exchange of atmosphere inside the package. In an atmosphere exchange by evacuation and gassing, it is possible to control the amount of gas or the gas pressure inside the package so that the molded lidding film is not raised so much that the effect of a force on the product is reduced too much, while extending the shelf time.

Damit sich die geformte Deckelfolie auch der Kontur der Oberseite anpassen kann, ist die geformte Deckelfolie vorzugsweise in einer Stärke in einem Bereich von 70 µm bis 120 µm ausgeführt, um die Eigenschaften des erfindungsgemäßen Verpackungsbehälters wie Fixierung des Produktes in der Packung, Anliegen der Deckelfolie auf der Oberseite des Produktes und Fixierung der auf dem Produkt liegenden Produktzusätze, zu erfüllen. Es sind auch Foliendicken außerhalb des angegebenen Bereiches denkbar, wenn die Folien als Mehrschichtfolien ausgebildet sind und somit entsprechende Eigenschaften wie Flexibilität speziell gewählt sein können.In order that the shaped lidding film can also adapt to the contour of the upper side, the shaped lidding film is preferably made in a thickness in a range of 70 μm to 120 μm in order to increase the properties of the packaging container according to the invention, such as fixation of the product in the pack the top of the product and fixation of the product additives lying on the product. It is also conceivable film thickness outside the specified range, if the films are formed as multilayer films and thus appropriate properties such as flexibility can be specially selected.

Erfindungsgemäß kann noch eine zweite Deckelfolie aufgebracht sein, die vorzugsweise eben in der Siegelebene mit der Packungsmulde und der ersten Deckelfolie versiegelt ist. Diese Folie kann in einer bedruckten Variante ausgeführt sein, womit Informationen über das innen liegende Lebensmittel angezeigt werden, und sie eignet sich auch zum Aufbringen von Etiketten oder dem Bedrucken z.B. des Haltbarkeitsdatums.According to the invention, a second lidding film can also be applied, which is preferably sealed in the sealing plane with the packing trough and the first lidding foil. This film can be made in a printed version, which displays information about the inside food, and is also suitable for applying labels or printing e.g. the expiration date.

Der somit bestehende zweite Raum zwischen erster und zweiter Deckelfolie kann evakuiert und/oder begast sein und auch mit weiteren Produkten befüllt sein.The thus existing second space between the first and second cover film can be evacuated and / or gassed and filled with other products.

Um eine stehende Präsentation des Lebensmittels zu ermöglichen, besitzt der Verpackungsbehälter vorzugsweise einen hierfür geeignet geformten Packungsboden. Mittels einer einseitig und parallel zu einer Seite des Verpackungsbehälters angebrachten ebenen oder linienförmigen Ausformung und dem an der gleichen Seite vorhanden Packungsrandes besteht die Möglichkeit einer aufrecht stehenden Präsentation z.B. in einem Kühlregal.In order to enable a standing presentation of the food, the packaging container preferably has a pack bottom suitably shaped for this purpose. By means of a plane or line-shaped formation attached on one side and parallel to one side of the packaging container and the package edge present on the same side, there is the possibility of an upright presentation, e.g. in a refrigerated shelf.

Im Folgenden wird ein vorteilhaftes Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher dargestellt.

Figur 1
zeigt eine schematische Seitenansicht einer Tiefziehverpackungsmaschine des erfindungsgemäßen Verfahrens,
Figur 2
zeigt eine Draufsicht eines Verpackungsbehälters,
Figur 3
zeigt eine Seitenansicht eines Verpackungsbehälters,
Figur 4
zeigt eine Seitenansicht eines stehenden Verpackungsbehälters.
In the following, an advantageous embodiment of the invention is illustrated in more detail with reference to a drawing.
FIG. 1
shows a schematic side view of a thermoforming packaging machine of the method according to the invention,
FIG. 2
shows a plan view of a packaging container,
FIG. 3
shows a side view of a packaging container,
FIG. 4
shows a side view of a standing packaging container.

Gleiche Komponenten sind in den Figuren durchgängig mit gleichen Bezugszeichen versehen.The same components are provided throughout the figures with the same reference numerals.

Figur 1 zeigt in schematischer Ansicht eine Tiefziehverpackungsmaschine 1. Diese weist eine Formstation 2, eine erste Siegelstation 3, eine zweite Siegelstation 4, eine Querschneideeinrichtung 5 und Längssehneideeinrichtung 6 auf, die in dieser Reihenfolge in einer Arbeitsrichtung R an einem Maschinengestell 7 angeordnet sind. Eingangsseitig befindet sich an dem Maschinengestell 7 eine Zufuhrrolle 8, von der eine Unterfolie 9 abgezogen wird. In der Formstation 2 wird in die Unterfolie 9 eine Packungsmulde 10 geformt. Im Bereich der ersten Siegelstation 3 ist ein Materialspeicher 10 vorgesehen, von dem eine erste Deckelfolie 11 abgezogen wird. Vor dem Zuführen der ersten Deckelfolie 11 in die erste Siegelstation 3 wird die erste Deckelfolie 11 in einer Deckeffolienformstation 12 geformt. FIG. 1 shows a schematic view of a thermoforming packaging machine 1. This has a forming station 2, a first sealing station 3, a second sealing station 4, a cross-cutting device 5 and Längssehneideeinrichtung 6, which are arranged in this order in a direction R on a machine frame 7. On the input side is located on the machine frame 7, a feed roller 8, from which a lower film 9 is withdrawn. In the forming station 2, a packing trough 10 is formed in the lower film 9. In the area of the first sealing station 3, a material reservoir 10 is provided, of which a first lid film 11 is deducted. Before the first cover film 11 is fed into the first sealing station 3, the first cover film 11 is formed in a cover film forming station 12.

Eine zweite Deckelfolie 13 wird von einem Materialspeicher 14 abgezogen und der zweiten Siegelstation 4 zugeführt und in dieser Station auf die Unterfolie 9 und/oder erste Deckelfolie 11 gesiegelt.A second cover film 13 is withdrawn from a material storage 14 and fed to the second sealing station 4 and sealed in this station to the lower film 9 and / or first cover film 11.

Ausgangsseitig ist an der Verpackungsmaschine 1 eine Abfuhreinrichtung 15 in Form eines Transportbandes vorgesehen, mit der fertige vereinzelte Verpackungen 16 abtransportiert werden. Ferner weist die Verpackungsmaschine 1 eine nicht dargestellte Vorschubeinrichtung auf, die das erste bahnförmige Material 9 seitlich ergreift und in dem Hauptarbeitstakt taktweise in der Arbeitsrichtung R weitertransportiert. Die Vorschubeinrichtung kann z.B. durch seitlich angeordnete Transportketten realisiert sein.On the output side, a discharge device 15 in the form of a conveyor belt is provided on the packaging machine 1, with the finished individualized packages 16 being transported away. Furthermore, the packaging machine 1, a feed device, not shown, which engages the first web-shaped material 9 side and further transported in the main working cycle in cycles in the direction of R. The feed device may e.g. be realized by laterally arranged transport chains.

Im Bereich der Einlegestrecke 17 wird ein Produkt 18 eingelegt. In der Deckelfolienformstation 12 wird die erste Deckelfolie 11 so geformt, dass die geformte Fläche beim Zuführen in die erste Siegelstation 3 zum Produkt 18 zeigt und auch mit diesem Kontakt kommt.In the area of the insertion path 17, a product 18 is inserted. In the lid film forming station 12, the first lid sheet 11 is formed so that the molded surface when feeding into the first sealing station 3 to the product 18 and also comes with this contact.

In der Figur 2 ist eine Draufsicht einer nach dem erfindungsgemäßen Verfahren hergestellten Verpackung dargestellt. Auf dem Produkt 18 (z.B. Pizza) befinden sich noch weitere kleine Produktzusätze 19 (z.B. Belag wie Käse, Salami, Schinken etc.). Die erste geformte Deckelfolie 11 und die zweite Deckelfolie 13 sind auf die zu einer Packungsmulde .10 geformte Unterfolie 9 mittels einer Siegelnaht 20 gesiegelt.In the FIG. 2 is a plan view of a package produced by the process according to the invention shown. On the product 18 (eg pizza) are still other small product additives 19 (eg topping such as cheese, salami, ham, etc.). The first molded lidding film 11 and the second lidding film 13 are sealed to the lower film 9 formed into a packing tray 10 by means of a sealing seam 20.

Dabei ist auf einer Seite der Verpackung 16 eine teilweise (gerade) Kante 21 vorgesehen. Zu dieser Kante Ist die erste geformte Deckelfolie 13 im Bereich des Packungsbodens parallel tiefgezogen, so dass eine Kante 22 ausgebildet ist. Belde zueinander parallelen Kanten 21, 22 bilden die Standfläche für eine stehende Verpackung 16.In this case, a partially (straight) edge 21 is provided on one side of the package 16. At this edge, the first molded cover film 13 is deep-drawn in parallel in the region of the package bottom, so that an edge 22 is formed. Belde mutually parallel edges 21, 22 form the footprint for a standing package 16th

Figur 3 zeigt die Ebene 23 der ersten geformten Deckelfolie 11 und die oberste Ebene 24 des Produktes 18 mit den Produktzusätzen 19. Bei der erfindungsgemäßen Verpackung liegt die Ebene 23 unter der Ebene 24. Damit wird sichergestellt, dass die Deckelfolie 11 mit dem Produkt 18, 19 in Kontakt ist, da die Deckelfolie, wenn sie als Kunststofffolie mit einer Dicke von kleiner 120µm ausgeführt ist, eine Flexibilität ähnlich einer Skinfolie gewährt und auch teilweise am Produktrand anliegt. Dies führt zu einer Fixierung des Produktes 18, 19 innerhalb der Packungsmulde 10 und kann über den Transport der Verpackung 16 hinaus einen gleichbleibenden Abstand vom Produkt 18, 19 zur Innenseite des Verpackungsbehälters gewährleisten. Eine zweite Komponente der Andrückkraft wird über den außen vorhandenen Atmosphärendruck gegenüber dem im Packungsinneren 25 vorhanden Unterdruck erzeugt. FIG. 3 shows the plane 23 of the first shaped lidding film 11 and the top level 24 of the product 18 with the product additives 19. In the packaging according to the invention, the plane 23 is below the level 24. This ensures that the lidding film 11 with the product 18, 19 in Contact is because the cover film, when it is designed as a plastic film with a thickness of less than 120μm, grants flexibility similar to a skin film and also partially rests on the product edge. This leads to a fixation of the product 18, 19 within the packing trough 10 and can over the transport of the package 16 beyond a constant distance from the product 18, 19 to the inside of the packaging container guarantee. A second component of the pressing force is generated via the external atmospheric pressure with respect to the vacuum present in the package interior 25.

Dabei wird in der ersten Siegelstation 3 der Raum 25 zwischen der Packungsmulde 10 und der geformten Deckelfolie 11 evakuiert und anschließend wieder begast, so dass die geformte Deckelfolie 11 eine gewünschte Andrückkraft F auf das Produkt 18, 19 ausübt. Diese Kraft F ist dosierbar über die Gasmenge bzw. den Gasdruck in dem Raum 25 mittels einer (nicht dargestellten) Steuerung, vorzugsweise der Maschinensteuerung. Die hierzu notwendigen Parameter können vom Bedienpersonal über eine (nicht dargestellte) Eingabeeinheit in die Steuerung eingegeben und gespeichert werden. In einer vorteilhaften Ausbildung können Maschineneinstellungen für verschiedene Produkte und Produktionsverfahren in Rezepturen abgespeichert werden.In the first sealing station 3, the space 25 between the packing trough 10 and the shaped lidding film 11 is evacuated and then fumigated again, so that the shaped lidding film 11 exerts a desired pressing force F on the product 18, 19. This force F is metered via the amount of gas or the gas pressure in the space 25 by means of a (not shown) control, preferably the machine control. The necessary parameters can be entered and stored by the operating personnel via an input unit (not shown) in the controller. In an advantageous embodiment, machine settings for different products and production processes can be stored in recipes.

Die zweite Deckelfolie 13 ist vorzugsweise eben auf beide Folien 9 und 11 aufgebracht und mit beiden Folien 9, 11 versiegelt. Sie ist vorzugsweise farbig ausgeführt, um Information zum Produkt 18, 19 zu geben und/oder um eine Fläche für aufzubringende Etiketten 27 zur Verfügung zu stellen.The second cover film 13 is preferably applied flat on both films 9 and 11 and sealed with two films 9, 11. It is preferably colored to provide information on the product 18, 19 and / or to provide an area for labels 27 to be applied.

Die Eigenschaften der ersten und zweiten Deckelfolien 11, 13 können unterschiedlich sein. Die erste Deckelfolie 11 ist in einer ersten Ausführung ohne eine Barriereschicht ausgeführt und die zweite Deckelfolie 13 ist luftdicht ausgeführt. Hierbei kann der Raum 26 zwischen beiden Deckelfolien 11, 13 begast sein, um die Andrückkraft F der ersten Deckelfolie 11 auf das Produkt 18, 19 zu erhöhen und damit die gewünschte Andrückkraft F besser kontrollieren bzw. steuern zu können.The properties of the first and second lidding sheets 11, 13 may be different. The first cover sheet 11 is executed in a first embodiment without a barrier layer and the second cover sheet 13 is made airtight. Here, the space 26 can be gassed between the two lidding films 11, 13 in order to increase the pressure force F of the first lidding film 11 on the product 18, 19 and thus better control or control the desired pressing force F.

In einer weiteren Variante beinhaltet die erfindungsgemäße Verpackung keine zweite Deckelfolie 13. Dabei ist die erste Deckelfolie 11 vorzugsweise mit einer Barriereschicht luftdicht ausgeführt. Eine Etikettierung und/oder Bedruckung kann auch an der Unterseite des Packungsbodens ausgeführt sein.In a further variant, the packaging according to the invention does not include a second cover film 13. In this case, the first cover film 11 is preferably made airtight with a barrier layer. Labeling and / or printing can also be carried out on the underside of the package bottom.

In der Figur 3 Ist auch zu erkennen, dass die Deckelfolie 11 tiefer als die Produkthöhe (Ebene 24) geformt ist und sich an die Oberseite an das Produkt 18, 19 anlegt und dabei die Produktzusätze 19 fixiert, damit es bei einer, wie in Figur 4 gezeigten, stehenden Lage der Verpackung nicht zu einer Positionsveränderung der Produktzusätze 19 auf dem Produkt 18 kommt. In Figur 4 ist auch die durch die Kante 21 des Packungsrandes und die Kante 22 des Packungsbodens definierte Standfläche dargestellt. Dabei kann die Kante 22 auch teilweise oder ganz als Fläche ausgebildet sein, um die Standfestigkeit zu maximieren. In dieser stehenden Lage ist der Verpackungsbehälter 16 in einem Auslageregal in Verkaufsmärkten optimal ausgestellt, um mit dem auf der zweiten Deckelfolie 13 zu werben und die Aufmerksamkeit des Kunden auf sich zu ziehen.In the FIG. 3 It can also be seen that the lidding film 11 is formed deeper than the product height (level 24) and is applied to the top of the product 18, 19 and thereby fixes the product additives 19, so that it in a, as in FIG. 4 shown, standing position of the package does not lead to a change in position of the product additives 19 on the product 18. In FIG. 4 is also through the edge 21 of the pack edge and the edge 22nd the bottom of the pack defined stand area shown. In this case, the edge 22 may also be partially or entirely formed as a surface in order to maximize the stability. In this standing position, the packaging container 16 is optimally displayed in a display shelf in retail markets to advertise with the on the second cover sheet 13 and attract the attention of the customer.

Claims (8)

  1. A method for operating a deep-drawing packaging machine (1), comprising the following steps:
    forming a packaging tray (10) in a first film (9),
    filling the packaging tray (10) with food (18, 19),
    deforming a cover film (11),
    feeding the packaging tray (10) with foodstuff (18, 19) and the formed cover film (11) into a sealing station (3),
    evacuating the space (25) between packaging tray (10) and cover film (11),
    gas-treating the space (25) between packaging tray (10) and cover film (11),
    closing the cover film (11) with the packaging tray (10) to obtain a package (16), characterized in that the deforming of the cover film (11) is carried out prior to feeding the cover film (11) into a sealing station (3),
    in that the cover film (11) is fed into the sealing station (3) in an already deformed state, wherein the deformed surface points towards the product,
    and in that the gas-treating of the space (25) between the packaging tray (10) and the cover film (11) is carried out at an adjustable pressure with gas or a gas mixture in such a way that upon venting the sealing station (3) subsequent to closing the cover film (11) with the packaging tray (10) to form a packaging (16), the cover film (11) exerts a force (F) on the foodstuff (18, 19).
  2. The method according to claim 1, characterized in that a plastic film having a thickness of from 70 µm to 120 µm is used as the cover film (11).
  3. The method according to any one of the preceding claims, characterized in that a second cover film (13) is applied.
  4. The method according to claim 3, characterized in that the space (26) between the formed cover film (11) and the second cover film (13) is evacuated and/or gas-treated.
  5. The method according to any one of the preceding claims, characterized in that the gas treatment of the space (25, 26) is adjusted by means of a controller.
  6. The method according to any one of the preceding claims, characterized in that a pizza is filled into the packaging tray (10) as foodstuff (18).
  7. Thermoforming packaging machine (1), adapted to perform a method according to one of claims 1 to 6, wherein the thermoforming packaging machine (1) comprises:
    a forming station (2) for forming packaging trays (10) into a lower film (9),
    a loading area (17) for loading a product (18, 19) into the formed packaging trays (10),
    a first sealing station (3) for sealing a cover film (11) to the lower film (9),
    an evacuating and gassing unit for evacuating and gas treating the packaging trays (10) in the first sealing station (3), and
    a cutting unit (5, 6) for singulating packagings (16) produced in the thermoforming packaging machine (1), characterized in that
    a cover film forming station (12) for deforming the first cover film (11) prior to feeding same into the first sealing station (3) is arranged upstream of the first sealing station (3),
    and that the thermoforming packaging machine (1) comprises a control for adjusting the amount of gas or the gas pressure during gas-treating a space (25) between the packaging tray (10) and the first cover film (11) by means of the evacuating and gassing unit,
    wherein parameters relating to gas-treating are insertable into the control via an input unit.
  8. Thermoforming packaging machine according to claim 7, further comprising a second sealing station (4) for sealing a second cover film (13) onto the lower film (9) and/or onto the first cover film (11).
EP11003720.7A 2010-05-07 2011-05-05 Method for operating a thermoform packaging machine and corresponding machine Revoked EP2384982B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010019720 DE102010019720B4 (en) 2010-05-07 2010-05-07 Method for operating a packaging machine

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EP2384982A1 EP2384982A1 (en) 2011-11-09
EP2384982B1 true EP2384982B1 (en) 2016-07-06

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USD964862S1 (en) 2018-08-21 2022-09-27 Intercontinental Great Brands Llc Tray

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EP2384982A1 (en) 2011-11-09
DE102010019720A1 (en) 2011-11-10
ES2584202T3 (en) 2016-09-26

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