EP2668103B1 - PACKAGING MACHINE and method FOR THE PREPARATION OF INDIVIDUAL EVACUATED PACKaGES - Google Patents

PACKAGING MACHINE and method FOR THE PREPARATION OF INDIVIDUAL EVACUATED PACKaGES Download PDF

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Publication number
EP2668103B1
EP2668103B1 EP12703443.7A EP12703443A EP2668103B1 EP 2668103 B1 EP2668103 B1 EP 2668103B1 EP 12703443 A EP12703443 A EP 12703443A EP 2668103 B1 EP2668103 B1 EP 2668103B1
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EP
European Patent Office
Prior art keywords
packaging
packaging machine
vacuum
material web
accordance
Prior art date
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EP12703443.7A
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German (de)
French (fr)
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EP2668103A1 (en
Inventor
Gerd HÜBNER
Klaus Meyer
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GEA Food Solutions Germany GmbH
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GEA Food Solutions Germany GmbH
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Publication date
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Priority to PL12703443T priority Critical patent/PL2668103T3/en
Publication of EP2668103A1 publication Critical patent/EP2668103A1/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
    • 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
    • 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
    • B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
    • 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
    • B65B31/021—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 the containers or wrappers being interconnected
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • 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
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • 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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
    • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting

Definitions

  • the present invention relates to a packaging machine with a thermoforming station that forms packaging trays in a web and a sealing station, which integrally secures a top fabric web on the web, wherein before the cohesive connection the packaging tray is and / or gassed and a cutting device, the so isolated packaging from the webs isolated.
  • a generic packaging machine is off DE 10 2006 020361 known.
  • the present invention relates to a method for producing a package in which a web is cyclically transported along a packaging machine and molded per cycle one or more packaging trays in the web and then filled the packaging tray with a packaged goods and then a lidding film is sealed to the packaging tray, wherein drawn before sealing in the packaging tray vacuum and / or gas exchange is made.
  • the packaging trays are often evacuated prior to sealing with a lidding film, i. H. the air contained therein is withdrawn and possibly replaced by a replacement gas.
  • This replacement gas may be, for example, nitrogen, carbon dioxide, argon and / or oxygen or a mixture of these or other gases.
  • the present invention relates to a packaging machine.
  • This packaging machine is preferably a so-called FFS packaging machine, ie a so-called form-fill-seal packaging machine.
  • a packaging tray in a web usually a plastic film web, for example by deep drawing, shaped and closed after filling the packaging tray in a sealing station with a Oberwdicbahn, which is also usually a plastic film web.
  • the top fabric web is materially connected, in particular by sealing, with the lower fabric web.
  • the packaging tray is now according to the invention discharged and / or gassed, wherein the degassing a certain vacuum, d. H. a certain negative pressure, is generated in the packaging tray.
  • gassing gas exchange takes place in the packaging tray, i. the packaging tray is at least partially replaced by a replacement gas. This gas exchange can follow a degassing of the packaging tray.
  • the replacement gas may be, for example, nitrogen, carbon dioxide, argon and / or oxygen or a mixture of these or other gases.
  • a vacuum storage volume is located in the area of the packaging machine.
  • This storage volume can be, for example, a tank and / or pipes and / or pockets and / or cross-sectional extensions adapted to the desired volume within the sealing tools. Due to the fact that this vacuum storage volume is provided in the region of the packaging machine, preferably in the immediate vicinity of the packaging tray to be emptied and / or fumigated, a significantly faster degassing or gassing of the individual packaging trays is possible than in the prior art. As a result, the number of cycles of the packaging machine can be increased.
  • the packaging machine has a frame on which, for example, the forming station, the sealing station and / or the separating station are preferably mounted displaceably.
  • the vacuum storage volume is provided within the frame of the packaging machine, so that the path between this volume and the sealing station, within which usually the vacuum is drawn or the gas exchange takes place, is as short as possible.
  • the flow resistance in the line between the volume and the discharge or gassing is low. By one or more of these measures, the desired negative pressure in the packaging tray and / or gas exchange can be done very quickly.
  • the machine is a cyclically operating machine.
  • a packaging tray or a format consisting of a plurality of packaging trays is transported intermittently along the packaging machine from one processing station to the next.
  • the vacuum storage volume is now dimensioned at least in its volume such that it has the vacuum volume required for one cycle. This volume is then available for the degassing of the packaging tray very quickly, so that the degassing or fumigating the packaging tray can be done much faster than in packaging machines according to the prior art.
  • the packaging machine has a gassing or degassing agent.
  • gassing or degassing agent may, for example, be a nozzle with which air is drawn out of the packaging troughs or the replacement gas is blown into the packaging troughs.
  • the fumigant and the degassing agent constitute a structural unit.
  • the packaging machine has a control with which the amount of the supplied gas or the degree of vacuum, d. H. the negative pressure in the packaging tray is adjustable. If this negative pressure, for example, not be large enough, air is drawn so long, until this vacuum is reached.
  • Another object of the present invention is a method according to claim 5.
  • the volume required for one cycle is at least substantially built up before the degassing of the packaging cavity is carried out.
  • a container with a certain volume can be subjected to a certain negative pressure before the actual degassing of the packaging tray takes place.
  • This container is then opened abruptly, for example, by a valve and sucks a predetermined amount of gas until the desired pressure has set in the packaging tray.
  • this procedure according to the invention is much faster.
  • the packaging tray can be filled with a replacement gas.
  • this container is then again subjected to negative pressure, wherein the connection between the container and the degassing, for example, the degassing is then closed.
  • This connection is opened again at the earliest when the intended negative pressure prevails in the container.
  • At least the majority of the vacuum volume required for one cycle is already provided during the sealing and / or during the transport of the material web in the region of the packaging machine.
  • the cycle speed of the method according to the invention is also increased because the required vacuum volume is already available when the next packaging cavity or the next format is to be evacuated.
  • the amount of gas to be filled in a packaging tray or the negative pressure to be achieved in a packaging tray regulated.
  • This regulation preferably takes place as a function of the filling quantity of the packaging tray.
  • FIG. 1 shows the packaging machine 1 according to the invention, which has a thermoforming station 2, a filling station 7 and a sealing station 19.
  • a web 8, here a plastic film web 8, the so-called sub-web, is withdrawn from a supply roll and, preferably cyclically transported along the packaging machine according to the invention from right to left. At one cycle, the web 8 is transported on by one format length.
  • the packaging machine has two transport means, in the present case in each case two endless chains, which are arranged to the right and left of the film web. Both at the beginning and at the end of the packaging machine at least one gear is provided for each chain in each case, around which the respective chain is deflected. At least one of these gears is driven.
  • the gears in the input area and / or in the output area can be connected to each other, preferably by a rigid axis.
  • Each means of transport usually has a plurality of clamping means which clamp the web 8 in the inlet region and transmit the movement of the means of transport to the lower film 8.
  • the clamping connection between the transport and the web 8 is released again.
  • the thermoforming station 2 which has an upper tool 3 and a lower tool 4, which has the shape of the packaging tray to be produced, the packaging trays 6 are formed in the film web 8.
  • the lower tool 4 is arranged on a lifting table 5, which, as symbolized by the double arrow, is vertically adjustable. Before each film feed, the lower tool 4 is lowered and then raised again.
  • the packaging trays are then filled in the filling station 7 with the packaged goods 16.
  • a top film 14 is firmly bonded, preferably by sealing on the web 8.
  • the upper tool and / or the lower tool are lowered or raised before and after each film transport.
  • a certain negative pressure is generated in the filled packaging tray and / or there is a gas exchange. The generation of the negative pressure or the gas exchange are preferably carried out while the respective packaging tray is within the sealing station, preferably immediately before the sealing tools 11, 12 are pressed against each other.
  • the upper film 14 may be guided in means of transport or be transported by transport chains, these means of transport then only from the Sealing station and possibly downstream extend. Otherwise, the statements that have been made to the means of transport of the lower film apply.
  • the finished packages are separated, which takes place in the present case with the cross cutter 25 and the slitter 23.
  • the cross cutter 25 can also be raised or lowered in the present case by means of a lifting device 9.
  • FIG. 2 shows the sealing station of the packaging machine according to the invention, in which an upper film web is sealed onto the filled packaging trays 6.
  • the not yet closed with a lid film packaging trays are provided with the reference numeral 6, the already closed packaging trays with the reference numeral 6 '.
  • the representation according to FIG. 2 It can also be seen that this packaging machine works in cycles, with each cycle a format 15, which in the present case consists of three rows and three columns of packaging trays, is further transported to a certain extent, in particular by the length of the format 15. The transport direction is symbolized by an arrow. Before the respective packaging tray is closed with the cover film, air is sucked out of the packaging trays according to the invention.
  • This degassing agent 17 is designed in the present case so that in the same unit also a fumigant 13 takes place, which, after or while the air is withdrawn from the packaging troughs, blows a replacement gas into the packaging trays.
  • all packaging trays of a format are simultaneously discharged and / or fumigated.
  • FIG. 3 essentially shows the embodiment according to FIG. 2 ,
  • the degassing 17 and the fumigant 13 are arranged parallel to the frame 10 of the packaging machine or parallel to the direction of movement of the film web 8 and are each provided as separate units.
  • 17 air can be removed from the packaging trays by means of the degassing and then and / or at the same time by means of the gassing 13 the packaging trays a replacement gas are supplied.
  • a gas storage tank 18 and / or a vacuum storage volume 20 are provided in the packaging machine in particular within the frame 10 of the packaging machine. These volumes are by means of a short path with the degassing or gassing 13, 17th connected.
  • a shut-off device for example a valve, is preferably provided in each case.
  • the vacuum storage volume 20 in the present case is connected to a vacuum means here a vacuum pump 21, which is operated so that the required volume in relation to the required negative pressure or the required amount is approximately available before the actual degassing of the respective packaging tray or Formats are made on packaging troughs.
  • vacuum is drawn in the vacuum storage volume 20, in particular before air is sucked out of the packaging troughs.
  • the gas storage volume 20 preferably has exactly the or a larger volume, which is required for the gas exchange of the respective format of packaging trays at a clock.
  • this storage volume 18 is filled here, for example from a gas source here a gas storage tank 22 before the actual fumigation of the packaging trays takes place.
  • FIG. 5 shows essentially the embodiment of FIG. 4 , wherein in the present case separate gassing or degassing nozzles 13, 17 are provided, which are each separately connected to the respective storage volume 18, 20.

Description

Die vorliegende Erfindung betrifft eine Verpackungsmaschine mit einer Tiefziehstation, die Verpackungsmulden in eine Warenbahn formt und einer Siegelstation, die eine Oberwarenbahn auf der Warenbahn stoffschlüssig befestigt, wobei vor der stoffschlüssigen Verbindung die Verpackungsmulde ent- und/oder begast wird und einer Schneideinrichtung, die die so fertiggestellten Verpackungen aus den Warenbahnen vereinzelt. Eine gattungsgemäße Verpackungsmaschine ist aus DE 10 2006 020361 bekannt. Desweiteren betrifft die vorliegende Erfindung ein Verfahren zur Herstellung einer Verpackung, bei dem eine Warenbahn taktweise entlang einer Verpackungsmaschine transportiert und pro Takt eine oder mehrere Verpackungsmulden in die Warenbahn eingeformt und die Verpackungsmulde danach mit einem Verpackungsgut befüllt und sodann eine Deckelfolie auf die Verpackungsmulde gesiegelt wird, wobei vor dem Siegeln in der Verpackungsmulde Vakuum gezogen und/oder ein Gasaustausch vorgenommen wird.The present invention relates to a packaging machine with a thermoforming station that forms packaging trays in a web and a sealing station, which integrally secures a top fabric web on the web, wherein before the cohesive connection the packaging tray is and / or gassed and a cutting device, the so isolated packaging from the webs isolated. A generic packaging machine is off DE 10 2006 020361 known. Furthermore, the present invention relates to a method for producing a package in which a web is cyclically transported along a packaging machine and molded per cycle one or more packaging trays in the web and then filled the packaging tray with a packaged goods and then a lidding film is sealed to the packaging tray, wherein drawn before sealing in the packaging tray vacuum and / or gas exchange is made.

Um die Haltbarkeit von einem verpackten Lebensmittel, insbesondere einem proteinhaltigen Lebensmittel zu verlängern, werden die Verpackungsmulden vor dem Verschließen mit einer Deckelfolie oftmals evakuiert, d. h. die darin befindliche Luft wird abgezogen und ggf. durch ein Austauschgas ersetzt. Bei diesem Austauschgas kann es sich beispielsweise um Stickstoff, Kohlendioxid, Argon und/oder Sauerstoff oder eine Mischung aus diesen oder anderen Gasen handeln. An Verpackungsmaschinen, bzw. an Verpackungsverfahren, die derartige evakuierte oder mit einem Austauschgas versehene Verpackungen herstellen können, werden heutzutage immer größere Anforderungen bzgl. der Leistungsfähigkeit, d. h. der hergestellten Verpackungen pro Minute gestellt.In order to extend the shelf life of a packaged food, especially a proteinaceous food, the packaging trays are often evacuated prior to sealing with a lidding film, i. H. the air contained therein is withdrawn and possibly replaced by a replacement gas. This replacement gas may be, for example, nitrogen, carbon dioxide, argon and / or oxygen or a mixture of these or other gases. On packaging machines, or on packaging methods that can produce such evacuated or provided with a replacement gas packaging, nowadays ever greater requirements in terms of performance, d. H. the produced packaging per minute.

Es war deshalb die Aufgabe der vorliegenden Erfindung, eine Verpackungsmaschine bzw. ein Verfahren zur Herstellung einer Verpackung zur Verfügung zu stellen, bei der/dem zum Einem eine Evakuierung bzw. ein Gasaustausch in der Verpackung möglich ist, bei der/dem zum Anderen aber auch sehr hohe Taktzahlen erzielt werden können.It was therefore an object of the present invention to provide a packaging machine or a method for producing a packaging, in which / on the one evacuation or gas exchange in the package is possible, in the / on the other hand but also very high numbers of cycles can be achieved.

Gelöst wird die Aufgabe mit einer Verpackungsmaschine nach Anspruch 1.The problem is solved with a packaging machine according to claim 1.

Die vorliegende Erfindung betrifft eine Verpackungsmaschine. Bei dieser Verpackungsmaschine handelt es sich vorzugsweise um eine sogenannte FFS-Verpackungsmaschine, d. h. eine sogenannte Form-Fill-Seal-Verpackungsmaschine.The present invention relates to a packaging machine. This packaging machine is preferably a so-called FFS packaging machine, ie a so-called form-fill-seal packaging machine.

Bei einer derartigen Verpackungsmaschine wird eine Verpackungsmulde in eine Warenbahn, in der Regel eine Kunststofffolienbahn, beispielsweise durch Tiefziehen, geformt und nach dem Füllen der Verpackungsmulde in einer Siegelstation mit einer Oberwärenbahn, bei der es sich in der Regel ebenfalls um eine Kunststofffolienbahn handelt, verschlossen. Dabei wird die Oberwarenbahn stoffschlüssig, insbesondere durch Siegeln, mit der Unterwarenbahn verbunden. Vor dieser Verbindung wird die Verpackungsmulde nun erfindungsgemäß ent- und/oder begast, wobei beim Entgasen ein gewisses Vakuum, d. h. ein gewisser Unterdruck, in der Verpackungsmulde erzeugt wird. Beim Begasen erfolgt ein Gasaustausch in der Verpackungsmulde, d.h. die Verpackungsmulde wird durch ein Austauschgas zumindest teilweise ersetzt. Dieser Gasaustausch kann sich an eine Entgasung der Verpackungsmulde anschließen. Bei dem Austauschgas kann es sich beispielsweise um Stickstoff, Kohlendioxid, Argon und/oder Sauerstoff oder eine Mischung aus diesen oder anderen Gasen handeln.In such a packaging machine a packaging tray in a web, usually a plastic film web, for example by deep drawing, shaped and closed after filling the packaging tray in a sealing station with a Oberwärenbahn, which is also usually a plastic film web. In this case, the top fabric web is materially connected, in particular by sealing, with the lower fabric web. Before this connection, the packaging tray is now according to the invention discharged and / or gassed, wherein the degassing a certain vacuum, d. H. a certain negative pressure, is generated in the packaging tray. When gassing gas exchange takes place in the packaging tray, i. the packaging tray is at least partially replaced by a replacement gas. This gas exchange can follow a degassing of the packaging tray. The replacement gas may be, for example, nitrogen, carbon dioxide, argon and / or oxygen or a mixture of these or other gases.

Nachdem die Oberwarenbahn stoffschlüssig an der Unterwarenbahn angeordnet worden ist, werden die so fertig gestellten Verpackungen anschließend vereinzelt.After the top goods web has been cohesively arranged on the lower fabric web, the packages thus finished are then separated.

Erfindungsgemäß ist nun vorgesehen, dass sich im Bereich der Verpackungsmaschine ein Vakuumspeichervolumen befindet. Bei diesem Speichervolumen kann es sich beispielsweise um einen Tank und/oder passend zum gewünschten Volumen angepasste Rohrleitungen und/oder Taschen und/oder Querschnittserweiterungen innerhalb der Siegelwerkzeuge handeln. Dadurch, dass dieses Vakuumspeichervolumen im Bereich der Verpackungsmaschine, vorzugsweise in unmittelbarer Nähe der zu ent- und/oder begasenden Verpackungsmulde vorgesehen ist, ist eine wesentlich schnellere Ent- bzw. Begasung der einzelnen Verpackungsmulden möglich, als beim Stand der Technik. Dadurch kann die Taktzahl der Verpackungsmaschine erhöht werden.According to the invention, it is now provided that a vacuum storage volume is located in the area of the packaging machine. This storage volume can be, for example, a tank and / or pipes and / or pockets and / or cross-sectional extensions adapted to the desired volume within the sealing tools. Due to the fact that this vacuum storage volume is provided in the region of the packaging machine, preferably in the immediate vicinity of the packaging tray to be emptied and / or fumigated, a significantly faster degassing or gassing of the individual packaging trays is possible than in the prior art. As a result, the number of cycles of the packaging machine can be increased.

In der Regel weist die erfindungsgemäße Verpackungsmaschine einen Rahmen auf, an dem beispielsweise die Formstation, die Siegelstation und/oder die Vereinzetungsstation vorzugsweise verschieblich gelagert sind. Vorzugsweise ist das Vakuumspeichervolumen innerhalb des Rahmens der Verpackungsmaschine vorgesehen, so dass der Weg zwischen diesem Volumen und der Siegelstation, innerhalb derer in der Regel das Vakuum gezogen wird bzw. der Gasaustausch erfolgt, möglichst kurz ist. Besonders bevorzugt ist auch der Strömungswiderstand in der Leitung zwischen dem Volumen und der Ent- bzw. Begasungsstelle gering. Durch eine oder mehrere dieser Maßnahmen kann der gewünschte Unterdruck in der Verpackungsmulde und/oder der Gasaustausch sehr schnell erfolgen. Vorzugsweise handelt es sich bei der Maschine um eine taktweise arbeitende Maschine. Bei einer derartigen taktweise arbeitenden Maschine wird eine Verpackungsmulde oder ein Format bestehend aus mehreren Verpackungsmulden intermittierend entlang der Verpackungsmaschine von einer Bearbeitungsstation zur nächsten transportiert. Während der eigentlichen Bearbeitungsschritte, d. h. beispielsweise während des Formens der Verpackungsmulde in die Uhterwarenbahn, dem Befüllen der Verpackungsmulde, der Ent- bzw. Begasung der Verpackungsmulde und/oder dem Siegeln der Oberwarenbahn auf die Unterwarenbahn, stehen die jeweiligen Verpackungsmulden still. Erfindungsgemäß ist das Vakuumspeichervolumen nun mindestens so in seinem Volumen dimensioniert, dass es das für einen Takt benötigte Vakuumvolumen aufweist. Dieses Volumen steht dann für die Entgasung der Verpackungsmulde sehr kurzfristig zur Verfügung, so dass das Ent- bzw. Begasen der Verpackungsmulde wesentlich schneller als bei Verpackungsmaschinen gemäß dem Stand der Technik erfolgen kann.As a rule, the packaging machine according to the invention has a frame on which, for example, the forming station, the sealing station and / or the separating station are preferably mounted displaceably. Preferably, the vacuum storage volume is provided within the frame of the packaging machine, so that the path between this volume and the sealing station, within which usually the vacuum is drawn or the gas exchange takes place, is as short as possible. Particularly preferably, the flow resistance in the line between the volume and the discharge or gassing is low. By one or more of these measures, the desired negative pressure in the packaging tray and / or gas exchange can be done very quickly. Preferably, the machine is a cyclically operating machine. In such a cyclically operating machine, a packaging tray or a format consisting of a plurality of packaging trays is transported intermittently along the packaging machine from one processing station to the next. During the actual processing steps, ie for example during the molding of the packaging tray in the Uhterwarenbahn, the filling of the packaging tray, the degassing or fumigation of the packaging tray and / or the sealing of the top product web on the lower fabric web, the respective packaging trays stand still. According to the invention, the vacuum storage volume is now dimensioned at least in its volume such that it has the vacuum volume required for one cycle. This volume is then available for the degassing of the packaging tray very quickly, so that the degassing or fumigating the packaging tray can be done much faster than in packaging machines according to the prior art.

In einer bevorzugten Ausführungsform weist die Verpackungsmaschine ein Begasungs-, bzw. ein Entgasungsmittel auf. Bei diesen Mitteln kann es sich beispielsweise um eine Düse handeln, mit dem Luft aus den Verpackungsmulden herausgezogen bzw. das Austauschgas in die Verpackungsmulden eingeblasen wird.In a preferred embodiment, the packaging machine has a gassing or degassing agent. These means may, for example, be a nozzle with which air is drawn out of the packaging troughs or the replacement gas is blown into the packaging troughs.

Vorzugsweise stellen das Begasungsmittel und das Entgasungsmittel eine bauliche Einheit dar.Preferably, the fumigant and the degassing agent constitute a structural unit.

In einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung weist die Verpackungsmaschine eine Regelung auf, mit der die Menge des zugeführten Gases bzw. der Grad des Vakuums, d. h. des Unterdrucks, in der Verpackungsmulde regelbar ist. Sollte dieser Unterdruck beispielsweise nicht groß genug sein, wird so lange Luft nachgezogen, bis dieser Unterdruck erreicht ist.In a further preferred embodiment of the present invention, the packaging machine has a control with which the amount of the supplied gas or the degree of vacuum, d. H. the negative pressure in the packaging tray is adjustable. If this negative pressure, for example, not be large enough, air is drawn so long, until this vacuum is reached.

Ein weiterer Gegenstand der vorliegenden Erfindung ist ein Verfahren nach Anspruch 5.Another object of the present invention is a method according to claim 5.

Die zu der erfindungsgemäßen Verpackungsmaschine gemachten Ausführungen gelten für das erfindungsgemäße Verfahren gleichermaßen und umgekehrt.The statements made on the packaging machine according to the invention apply equally to the method according to the invention and vice versa.

Erfindungsgemäß ist nun vorgesehen, dass das für einen Takt benötigte Volumen zumindest im Wesentlichen aufgebaut wird, bevor die Entgasung der Verpackungsmulde durchgeführt wird. Beispielsweise kann in der Nähe der Verpackungsmaschine ein Behälter mit einem gewissen Volumen mit einem gewissen Unterdruck beaufschlagt werden, bevor die eigentliche Entgasung der Verpackungsmulde erfolgt. Dieser Behälter wird dann schlagartig beispielsweise durch ein Ventil geöffnet und saugt eine vorgegebene Menge an Gas solange ein, bis sich der gewünschte Druck in der Verpackungsmulde eingestellt hat. Im Gegensatz zu einer Verpackungsmaschine, bei der der Entgasungsvorgang nur durch eine Vakuumpumpe erfolgt, ist diese erfindungsgemäße Vorgehensweise wesentlich schneller. Gleichzeitig oder anschließend kann die Verpackungsmulde mit einem Austauschgas befüllt werden. Sobald die Evakuierung der Verpackungsmulde abgeschlossen ist, wird dieser Behälter dann wieder mit Unterdruck beaufschlagt, wobei die Verbindung zwischen dem Behälter und dem Entgasungsmittel, beispielweise der Entgasungsdüse dann geschlossen ist. Diese Verbindung wird frühestens dann wieder geöffnet, wenn in dem Behälter der vorgesehene Unterdruck herrscht.According to the invention, it is now provided that the volume required for one cycle is at least substantially built up before the degassing of the packaging cavity is carried out. For example, in the vicinity of the packaging machine, a container with a certain volume can be subjected to a certain negative pressure before the actual degassing of the packaging tray takes place. This container is then opened abruptly, for example, by a valve and sucks a predetermined amount of gas until the desired pressure has set in the packaging tray. In contrast to a packaging machine in which the degassing process is carried out only by a vacuum pump, this procedure according to the invention is much faster. At the same time or subsequently, the packaging tray can be filled with a replacement gas. Once the evacuation of the packaging tray is completed, this container is then again subjected to negative pressure, wherein the connection between the container and the degassing, for example, the degassing is then closed. This connection is opened again at the earliest when the intended negative pressure prevails in the container.

Gemäß einem weiteren oder einem bevorzugten Gegenstand des erfindungsgemäßen Verfahrens wird zumindest der Großteil des für einen Takt benötigten Vakuumsvolumens bereits während des Siegelns und/oder während des Transports der Warenbahn im Bereich der Verpackungsmaschine bereitgestellt. Dadurch wird ebenfalls die Taktzahl des erfindungsgemäßen Verfahrens erhöht, weil das benötigte Vakuumvolumen bereits zur Verfügung steht, wenn die nächste Verpackungsmulde bzw. das nächste Format evakuiert werden soll.According to another or a preferred object of the method according to the invention, at least the majority of the vacuum volume required for one cycle is already provided during the sealing and / or during the transport of the material web in the region of the packaging machine. As a result, the cycle speed of the method according to the invention is also increased because the required vacuum volume is already available when the next packaging cavity or the next format is to be evacuated.

Vorzugsweise wird die Gasmenge, die in eine Verpackungsmulde eingefüllt werden soll bzw. der Unterdruck der in einer Verpackungsmulde erzielt werden soll, geregelt. Vorzugsweise erfolgt diese Regelung in Abhängigkeit der Füllmenge der Verpackungsmulde.Preferably, the amount of gas to be filled in a packaging tray or the negative pressure to be achieved in a packaging tray, regulated. This regulation preferably takes place as a function of the filling quantity of the packaging tray.

Im Folgenden werden die Erfindungen anhand der Figuren 1 bis 5 erläutert. Diese Erläuterungen sind lediglich beispielhaft und schränken den allgemeinen Erfindungsgedanken nicht ein. Die Erläuterungen gelten für alle Gegenstände der vorliegenden Erfindung gleichermaßen.

  • Figur 1 zeigt die erfindungsgemäße Verpackungsmaschine.
  • Figur 2 zeigt eine erste Anordnung des Ent- bzw. Begasungsmittels.
  • Figur 3 zeigt eine zweite Anordnung des Ent- bzw. Begasungsmittels.
  • Figur 4 zeigt schematisch eine weitere Ausführungsform der erfindungsgemäßen Verpackungsmaschine.
  • Figur 5 zeigt eine weitere schematische Darstellung der erfindungsgemäßen Verpackungsmaschine.
In the following, the inventions are based on the FIGS. 1 to 5 explained. These explanations are merely exemplary and do not limit the general inventive concept. The explanations apply equally to all articles of the present invention.
  • FIG. 1 shows the packaging machine according to the invention.
  • FIG. 2 shows a first arrangement of the fumigant or fumigant.
  • FIG. 3 shows a second arrangement of the fumigant or fumigant.
  • FIG. 4 schematically shows a further embodiment of the packaging machine according to the invention.
  • FIG. 5 shows a further schematic representation of the packaging machine according to the invention.

Figur 1 zeigt die erfindungsgemäße Verpackungsmaschine 1, die eine Tiefziehstation 2, eine Füllstation 7 sowie eine Siegelstation 19 aufweist. Eine Warenbahn 8, hier eine Kunststofffolienbahn 8, die sogenannte Unterbahn, wird von einer Vorratsrolle abgezogen und, vorzugsweise taktweise, entlang der erfindungsgemäßen Verpackungsmaschine von rechts nach links transportiert. Bei einem Takt wird die Warenbahn 8 um eine Formatlänge weitertransportiert. Dafür weist die Verpackungsmaschine zwei Transportmittel, in dem vorliegenden Fall jeweils zwei Endlosketten, auf, die rechts und links von der Folienbahn angeordnet sind. Sowohl am Anfang als auch am Ende der Verpackungsmaschine ist für jede Kette jeweils mindestens ein Zahnrad vorgesehen, um das die jeweilige Kette umgelenkt wird. Mindestens eines dieser Zahnräder ist angetrieben. Die Zahnräder im Eingangsbereich und/oder im Ausgangsbereich können miteinander, vorzugsweise durch eine starre Achse, verbunden sein. Jedes Transportmittel weist üblicherweise eine Vielzahl von Klemmmitteln auf, die die Warenbahn 8 im Einlaufbereich klemmend ergreifen und die Bewegung des Transportmittels auf die Unterfolie 8 übertragen. Im Auslaufbereich der Verpackungsmaschine wird die klemmende Verbindung zwischen dem Transportmittel und der Warenbahn 8 wieder gelöst. In der Tiefziehstation 2, die über ein Oberwerkzeug 3 und ein Unterwerkzeug 4 verfügt, das die Form der herzustellenden Verpackungsmulde aufweist, werden die Verpackungsmulden 6 in die Folienbahn 8 eingeformt. Das Unterwerkzeug 4 ist auf einem Hubtisch 5 angeordnet, der, wie durch den Doppelpfeil symbolisiert wird, vertikal verstellbar ist. Vor jedem Folienvorschub wird das Unterwerkzeug 4 abgesenkt und danach wieder angehoben. Im weiteren Verlauf der Verpackungsmaschine werden die Verpackungsmulden dann in der Füllstation 7 mit dem Verpackungsgut 16 befüllt. In der sich daran anschließenden Siegelstation 19, die ebenfalls aus einem Oberwerkzeug 12 und einem vertikal verstellbaren Unterwerkzeug 11 besteht, wird eine Oberfolie 14 stoffschlüssig, vorzugsweise durch Siegeln an der Warenbahn 8 befestigt. Auch in der Siegelstation werden das Oberwerkzeug und/oder das Unterwerkzeug vor und nach jedem Folientransport abgesenkt bzw. angehoben. Vor dem Siegeln der Oberfolie 14 an die Unterfolie 8 wird in der befüllten Verpackungsmulde ein gewisser Unterdruck erzeugt und/oder es erfolgt ein Gasaustausch. Die Erzeugung des Unterdrucks bzw. der Gasaustausch erfolgen vorzugsweise während sich die jeweilige Verpackungsmulde innerhalb der Siegelstation befindet, vorzugsweise unmittelbar, bevor die Siegelwerkzeuge 11, 12 gegeneinander gepresst werden. Auch die Oberfolie 14 kann in Transportmitteln geführt sein bzw. von Transportketten transportiert werden, wobei sich diese Transportmittel dann nur von der Siegelstation und ggf. stromabwärts erstrecken. Ansonsten gelten die Ausführungen, die zu dem Transportmitteln der Unterfolie gemacht wurden. Im weiteren Verlauf der Verpackungsmaschine werden die fertiggestellten Verpackungen vereinzelt, was in dem vorliegenden Fall mit dem Querschneider 25 und dem Längsschneider 23 erfolgt. Der Querschneider 25 ist in dem vorliegenden Fall ebenfalls mit einer Hubeinrichtung 9 anhebbar bzw. absenkbar. FIG. 1 shows the packaging machine 1 according to the invention, which has a thermoforming station 2, a filling station 7 and a sealing station 19. A web 8, here a plastic film web 8, the so-called sub-web, is withdrawn from a supply roll and, preferably cyclically transported along the packaging machine according to the invention from right to left. At one cycle, the web 8 is transported on by one format length. For this purpose, the packaging machine has two transport means, in the present case in each case two endless chains, which are arranged to the right and left of the film web. Both at the beginning and at the end of the packaging machine at least one gear is provided for each chain in each case, around which the respective chain is deflected. At least one of these gears is driven. The gears in the input area and / or in the output area can be connected to each other, preferably by a rigid axis. Each means of transport usually has a plurality of clamping means which clamp the web 8 in the inlet region and transmit the movement of the means of transport to the lower film 8. In the outlet region of the packaging machine, the clamping connection between the transport and the web 8 is released again. In the thermoforming station 2, which has an upper tool 3 and a lower tool 4, which has the shape of the packaging tray to be produced, the packaging trays 6 are formed in the film web 8. The lower tool 4 is arranged on a lifting table 5, which, as symbolized by the double arrow, is vertically adjustable. Before each film feed, the lower tool 4 is lowered and then raised again. In the further course of the packaging machine, the packaging trays are then filled in the filling station 7 with the packaged goods 16. In the subsequent sealing station 19, which also consists of an upper tool 12 and a vertically adjustable lower tool 11, a top film 14 is firmly bonded, preferably by sealing on the web 8. Also in the sealing station, the upper tool and / or the lower tool are lowered or raised before and after each film transport. Before sealing the upper film 14 to the lower film 8, a certain negative pressure is generated in the filled packaging tray and / or there is a gas exchange. The generation of the negative pressure or the gas exchange are preferably carried out while the respective packaging tray is within the sealing station, preferably immediately before the sealing tools 11, 12 are pressed against each other. The upper film 14 may be guided in means of transport or be transported by transport chains, these means of transport then only from the Sealing station and possibly downstream extend. Otherwise, the statements that have been made to the means of transport of the lower film apply. In the further course of the packaging machine, the finished packages are separated, which takes place in the present case with the cross cutter 25 and the slitter 23. The cross cutter 25 can also be raised or lowered in the present case by means of a lifting device 9.

Figur 2 zeigt die Siegelstation der erfindungsgemäßen Verpackungsmaschine, bei der eine Oberfolienbahn auf die befüllten Verpackungsmulden 6 gesiegelt wird. Die noch nicht mit einer Deckelfolie verschlossenen Verpackungsmulden sind mit dem Bezugszeichen 6 die bereits verschlossenen Verpackungsmulden mit dem Bezugszeichen 6' versehen. Der Darstellung gemäß Figur 2 ist ebenfalls zu entnehmen, dass diese Verpackungsmaschine taktweise arbeitet, wobei bei jedem Takt ein Format 15, das in dem vorliegenden Fall aus drei Reihen und drei Spalten von Verpackungsmulden besteht, um ein gewisses Maß insbesondere um die Länge des Formates 15 weiter transportiert wird. Die Transportrichtung ist durch einen Pfeil symbolisiert. Bevor die jeweilige Verpackungsmulde mit der Deckelfolie verschlossen wird, wird erfindungsgemäß Luft aus den Verpackungsmulden abgesaugt. Dies erfolgt in dem vorliegenden Fall mit einem Entgasungsmittel 17, das quer zur Transportrichtung der Folienbahn, die durch den Pfeil dargestellt ist, angeordnet ist. Dieses Entgasungsmittel 17 ist in dem vorliegenden Fall so ausgeführt, dass sich in derselben Baueinheit ebenfalls ein Begasungsmittel 13 erfolgt, das, nachdem oder während die Luft aus den Verpackungsmulden abgezogen wird, ein Austauschgas in die Verpackungsmulden einbläst. In dem vorliegenden Fall werden alle Verpackungsmulden eines Formates gleichzeitig ent- und/oder begast. FIG. 2 shows the sealing station of the packaging machine according to the invention, in which an upper film web is sealed onto the filled packaging trays 6. The not yet closed with a lid film packaging trays are provided with the reference numeral 6, the already closed packaging trays with the reference numeral 6 '. The representation according to FIG. 2 It can also be seen that this packaging machine works in cycles, with each cycle a format 15, which in the present case consists of three rows and three columns of packaging trays, is further transported to a certain extent, in particular by the length of the format 15. The transport direction is symbolized by an arrow. Before the respective packaging tray is closed with the cover film, air is sucked out of the packaging trays according to the invention. This takes place in the present case with a degassing 17, which is arranged transversely to the transport direction of the film web, which is shown by the arrow. This degassing agent 17 is designed in the present case so that in the same unit also a fumigant 13 takes place, which, after or while the air is withdrawn from the packaging troughs, blows a replacement gas into the packaging trays. In the present case all packaging trays of a format are simultaneously discharged and / or fumigated.

Figur 3 zeigt im Wesentlichen die Ausführungsform gemäß Figur 2, wobei in dem vorliegenden Fall das Entgasungsmittel 17 bzw. das Begasungsmittel 13 parallel zum Rahmen 10 der Verpackungsmaschine bzw. parallel zu der Bewegungsrichtung der Folienbahn 8 angeordnet und jeweils als separate Einheiten vorgesehen sind. Insbesondere in den vorliegenden Fall kann mittels dem Entgasungsmittel 17 Luft aus den Verpackungsmulden abgezogen werden und danach und/öder gleichzeitig mittels der Begasungsdüse 13 den Verpackungsmulden ein Austauschgas zugeführt werden. FIG. 3 essentially shows the embodiment according to FIG FIG. 2 , In the present case, the degassing 17 and the fumigant 13 are arranged parallel to the frame 10 of the packaging machine or parallel to the direction of movement of the film web 8 and are each provided as separate units. In particular, in the present case, 17 air can be removed from the packaging trays by means of the degassing and then and / or at the same time by means of the gassing 13 the packaging trays a replacement gas are supplied.

Wie insbesondere Figur 4 entnommen werden kann, sind im Bereich der Verpackungsmaschine insbesondere innerhalb des Rahmens 10 der Verpackungsmaschine ein Gasspeichertank 18 und/oder ein Vakuumspeichervolumen 20 vorgesehen. Diese Volumina sind mittels eines kurzen Weges mit der Ent- bzw. Begasungsdüse 13, 17 verbunden. In dieser Verbindung ist jeweils vorzugsweise ein Absperrorgan, beispielsweise ein Ventil vorgesehen. Das Vakuumspeichervolumen 20 ist in dem vorliegenden Fall mit einem Vakuummittel hier einer Vakuumpumpe 21 verbunden, die so betrieben wird, dass das benötigte Volumen in Bezug auf den benötigten Unterdruck bzw. die benötigte Menge etwa zurVerfügung steht, bevor die eigentliche Entgasung der jeweiligen Verpackungsmulde oder des Formates an Verpackungsmulden erfolgt. Dafür wird Vakuum in dem Vakuumspeichervolumen 20 gezogen insbesondere bevor Luft aus den Verpackungsmulden gesaugt wird. Das Gasspeichervolumen 20 weist vorzugsweise genau das oder ein größeres Volumen auf, das für den Gasaustausch des jeweiligen Formates an Verpackungsmulden bei einem Takt benötigt wird. Dafür wird dieses Speichervolumen 18 beispielsweise aus einer Gasquelle hier einem Gasvorratstank 22 befüllt, bevor die eigentliche Begasung der Verpackungsmulden erfolgt.In particular FIG. 4 can be removed, a gas storage tank 18 and / or a vacuum storage volume 20 are provided in the packaging machine in particular within the frame 10 of the packaging machine. These volumes are by means of a short path with the degassing or gassing 13, 17th connected. In this connection, a shut-off device, for example a valve, is preferably provided in each case. The vacuum storage volume 20 in the present case is connected to a vacuum means here a vacuum pump 21, which is operated so that the required volume in relation to the required negative pressure or the required amount is approximately available before the actual degassing of the respective packaging tray or Formats are made on packaging troughs. For this purpose, vacuum is drawn in the vacuum storage volume 20, in particular before air is sucked out of the packaging troughs. The gas storage volume 20 preferably has exactly the or a larger volume, which is required for the gas exchange of the respective format of packaging trays at a clock. For this storage volume 18 is filled here, for example from a gas source here a gas storage tank 22 before the actual fumigation of the packaging trays takes place.

Figur 5 zeigt im wesentlichen die Ausführungsform der Figur 4, wobei in dem vorliegenden Fall separate Begasungs- bzw. Entgasungsdüsen 13, 17 vorgesehen sind, die jeweils separat mit dem jeweiligen Speichervolumen 18, 20 verbunden sind. FIG. 5 shows essentially the embodiment of FIG. 4 , wherein in the present case separate gassing or degassing nozzles 13, 17 are provided, which are each separately connected to the respective storage volume 18, 20.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Verpackungsmaschinepackaging machine
22
TiefziehstationThermoforming station
33
Oberwerkzeug der TiefziehstationUpper tool of the thermoforming station
44
Unterwerkzeug der TiefziehstationLower tool of the thermoforming station
55
Hubtisch, Träger eines Werkzeugs der Siegel- , Tiefziehstation und/oder der SchneideinrichtungLifting table, carrier of a tool of the sealing, thermoforming station and / or the cutting device
6, 6'6, 6 '
Verpackungsmuldepackaging tray
77
Füllstationfilling station
88th
Unterwarenbahn, UnterfolienbahnUnterwarenbahn, Unterfolienbahn
99
Hubeinrichtunglifting device
1010
Rahmenframe
1111
Unterwerkzeug der SiegelstationLower tool of the sealing station
1212
Oberwerkzeug der SiegelstationUpper tool of the sealing station
1313
Begasungsmittel, BegasungsdüseFumigant, fumigation nozzle
1414
Oberwarenbahn, Oberfolienbahn, DeckelfolieUpper goods web, upper film web, cover film
1515
Formatformat
1616
Verpackungsgutpackaged goods
1717
Entgasungsmitteldegassing
1818
Gasspeichervolumen, GasspeichertankGas storage volume, gas storage tank
1919
Siegelstationsealing station
2020
Vakuumspeichervoumen, VakuumspeichertankVacuum storage reservoir, vacuum storage tank
2121
Vakuumpumpevacuum pump
2222
Gasquelle, GasvorratstankGas source, gas storage tank
2323
--
2424
Einlaufbereichintake area
2525
Schneideinrichtungcutter

Claims (8)

  1. Packaging machine (1), with a deep-drawing station (2), which forms packaging troughs (6) in a material web (8), and a sealing station (19), which fastens an upper material web (14) to the material web (8) in a material bond wherein, before the material bond is made, the packaging trough is degassed and gasified and a cutting device (27), which separates the thus completed packagings from the material web (8, 14), wherein it operates cyclically, characterised in that it has a vacuum storage volume (20) provided in the area of the packaging machine, in which at least the vacuum volume required for a cycle is provided.
  2. Packaging machine in accordance with claim 1, characterised in that it has a gasifying means (13) and/or a degassing means (17).
  3. Packaging machine in accordance with claim 2, characterised in that the gasifying means (13) and the degassing means (17) are provided in one unit.
  4. Packaging machine in accordance with one of the preceding claims, characterised in that it has an automatic controller, which regulates the gas supplied or the vacuum.
  5. Method for manufacture of a packaging, in which a material web is transported cyclically along a packaging machine and one or more packaging troughs are formed in the material web (8) per cycle and the packaging trough is then filled with a packaging material and then a cover foil (14) is sealed on to the packaging trough wherein, before sealing, a vacuum is drawn in the packaging trough, characterised in that at least the major portion of the vacuum volume required for the cycle is made available from the vacuum storage (20) during sealing and/or during transport of the material web in the area of the packaging machine.
  6. Method in accordance with claim 5, characterised in that the vacuum required for a cycle is at least essentially established before the degassing of the packaging trough takes place.
  7. Method in accordance with one of the claims 5 or 6, characterised in that the amount of gas and/or the negative pressure are regulated.
  8. Method in accordance with claim 7, characterised in that it is regulated as a function of the filling level of the packaging trough.
EP12703443.7A 2011-01-27 2012-01-27 PACKAGING MACHINE and method FOR THE PREPARATION OF INDIVIDUAL EVACUATED PACKaGES Active EP2668103B1 (en)

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DE102011009658 2011-01-27
PCT/EP2012/000377 WO2012100956A1 (en) 2011-01-27 2012-01-27 Packaging machine and method for producing evacuated and/or gassed packagings

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EP2668103A1 (en) 2013-12-04
RU2013139452A (en) 2015-03-10
CN103492270A (en) 2014-01-01
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CN103492270B (en) 2015-07-15
US20140013704A1 (en) 2014-01-16
RU2571347C2 (en) 2015-12-20

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