EP2251265A2 - Packaging machine for multi-layer covering film - Google Patents
Packaging machine for multi-layer covering film Download PDFInfo
- Publication number
- EP2251265A2 EP2251265A2 EP10004250A EP10004250A EP2251265A2 EP 2251265 A2 EP2251265 A2 EP 2251265A2 EP 10004250 A EP10004250 A EP 10004250A EP 10004250 A EP10004250 A EP 10004250A EP 2251265 A2 EP2251265 A2 EP 2251265A2
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- EP
- European Patent Office
- Prior art keywords
- packaging machine
- machine according
- sealing
- plate
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/02—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
Definitions
- the present invention relates to a thermoforming packaging machine according to the preamble of claim 1, and to a packaging machine according to the preamble of claim 10.
- the present invention relates to a machine for producing packaging, in particular packaging for fresh meat products, which on the one hand should have a long shelf life and on the other hand should look attractive in the sales display for the customer.
- packaging in particular packaging for fresh meat products
- it requires a corresponding oxygen content on the product surface to achieve the appealing redness.
- An alternative method is to use a product-filled tray sealed with two lidding films, an outer, oxygen-impermeable, and an inner, oxygen-permeable lidding film, evacuating the interior of the package and allowing the product to be stored for a long time due to the low residual oxygen ,
- the resulting discoloration is optically inadequate, but is revised before removing the package in the sales display, by removing the outer, oxygen-impermeable lidding foil, since now oxygen can diffuse through the inner, oxygen-permeable lidding foil into the packaging and to a recoverable redness of the product everything in the visible range.
- Both methods are preferably suitable for a combination of packaging and product, in which the product as a whole under the top edge (equivalent to the Sealing plane) of the packaging tray into which it was filled. If a part of the product surface were located above the sealing plane, then the cover film would come into contact with the product there and the oxygen from the interior of the packaging or also the oxygen which diffuses from the outside would not be able to reach these surfaces. This creates undesirable discolorations on the product, which the buyer of this product rates as deficient.
- EP 0 690 012 B1 describes a two-layered film having an outer, oxygen-impermeable and an inner, oxygen-permeable layer which is capable of diffusing oxygen to the product despite a product contact.
- This effect is produced by the fact that between the two layers of particles, preferably food starch particles, are distributed as evenly as possible, which ensure that oxygen can move in this intermediate region and thus can continuously flow to the points at which the product touches the oxygen is consumed.
- the total oxygen consumed in this intermediate region is enriched again by the amount of oxygen in the interior of the package and by the oxygen-permeable lidding film.
- tray sealers are now known which seal the dishes filled with overhanging products with said two-ply lidding sheets.
- lid films In order to have the shrinkability of the lid films act, it must be heated to a minimum temperature before closing with the shell and then venting the chamber so that the film in this state as a "second skin” applies to the product in some areas and thus represents a very attractive packaging.
- the person skilled in the art is aware of lid foils in a sealing station for this purpose by applying to heat on a plate to reach the necessary temperature, which releases the shrinkage properties. However, this temperature is below the sealing temperature of the sealing plate or the film.
- a complex and expensive solution is a separate heating device, which is located in the plate and on the one hand requires space and on the other hand requires an effort to lead the power line for the heater so that the tightness of the chamber in the closed state, e.g. for the evacuation process or the seal is not overridden.
- Simpler designs provide for a plate which is to be brought to the desired temperature only by the radiant heat of the sealing plate. This is especially detrimental when starting the packaging machine, for example, after converting to a new packaging or a new product, since a very long waiting period arises. In addition, this process is not regulated, but requires that in the following operation, the radiant heat corresponds to the heating of the plate.
- the object of the invention is to develop a cost-effective packaging machine, which offers a possibility to eliminate the disadvantages mentioned above nevertheless.
- heat plates are used in the standard case, which are preferably located in the sealing station and are heated in a controlled manner to cause the heating of the lidding film. It has proven to be particularly advantageous to equip the heat plate with at least one contact for the heat transfer by heat conduction from the sealing plate. This has proved to be particularly simple and inexpensive to manufacture, since no own heating devices must be mounted on or in the hot plate, the power line in the following consuming out of the chamber of the sealing station must be led out especially sealed.
- the space required for the hot plate can be optimized here.
- this conventional heating effect when starting the packaging machine for example, after a set-up, since the waiting time is extended to the start of production. Due to the inventive temporary direct contact between sealing plate and hot plate this waiting time can be reduced to a minimum.
- a sealing plate need not be made in one piece, it may also be a heating plate with connected bars for sealing, possibly with a separate mobility of the webs relative to the heating plate.
- the contact between the heat plate and the sealing plate is preferably designed to be detachable, so that the heating plate can also cool down, for example, if the temperature range of the heating plate is to move downward after the setting-up process on another cover foil with different properties. Furthermore, it is advantageous to achieve a cooling of the heat plate by separating the contact, since in the case of a set-up or cleaning process, the operator can get to the surface of the hot plate with body parts and thus the risk of injury can be limited or the waiting time in which the hot plate reached an uncritical temperature, can be reduced.
- the solubility of the contact over a relative mobility of the heat plate, the sealing plate and / or contact elements can be realized. These movements can be performed structurally simple and inexpensive, if the heat plate and the sealing plate anyway perform linear movements for the process of sealing in the sealing station.
- the invention enables a linear vertical movement of the sealing plate to the heating plate within the sealing station which is adapted to releasably contact the sealing plate with the heating plate.
- This movement can already be performed with the chamber open, to heat the heat plate for the sealing process to the necessary temperature, to optimize the cycle time of the sealing operation and to increase the performance of the packaging machine.
- the heating of the lid film can be effected by direct contact with the hot plate to the cover film in the shortest possible time to the required temperature to heat up, to proceed with the subsequent processes, and to optimize the throughput, here as packaging per unit time.
- the packaging machine is equipped with a controller to perform at least the regulation of the temperature of the hot plate. It may also be able to store the product-specific data and / or the temperature-specific data for the lidding film and retrieve it again during repeated production and automatically run the regulation for heating the hotplate.
- the process of temperature regulation can result in an accurate temperature in and / or on the hot plate.
- the packaging machine can be designed as a thermoforming packaging machine with a device of the type described below for separating and merging a shrinkable multilayer lid film and optionally the advantageous heating of the lid film in the sealing station by means of a heat plate, which via a heat transfer Contact with the sealing plate can be temperature-regulated, can be equipped.
- thermoforming packaging machine having the features of claim 10.
- the thermoforming packaging machine has a forming station to form containers in a first sheet-like material, here as a lower film, in the area of an insertion path Products are placed, in particular, the property that they can survive beyond the top edge of the molded container.
- a sealing station is arranged, in which a second web-like material as a lid film, in particular a multilayer lid film, is sealed onto the container and closes it. At least two layers of the multilayer cover film are previously changed in their distance from each other. This has the advantage in multilayer lidding films that a gas cushion can form between adjacent layers to ensure that the outer lidding film can not come into direct contact with the product.
- the lidding film may consist of an outer, oxygen-impermeable and an inner, oxygen-permeable layer.
- the gas cushion between the layers may serve to facilitate or enhance the flow of oxygen between the two layers.
- the oxygen can safely reach the points at which the product is in contact or in contact with the product with the inner, oxygen-permeable layer, so that a discoloration of the particular fresh meat product is prevented or at least minimized.
- the gas cushion can be formed in particular by the fact that the two layers of the cover film in the transport direction reduce their distance and are transported close to each other and parallel in the sealing station.
- a closed volume can be generated by closing the chamber and clamps in the entire (all-round) outer edge region, in which thus the gas cushion is located.
- the resulting gas cushion can serve for good oxygen transport within at least two adjacent layers of the cover sheet.
- thermoforming packaging machine In order to reduce or even eliminate negative influences due to moisture which may be present in the environment, this area can also be enclosed by a separate chamber in order to be able to generate its own, preferably dry, atmosphere.
- the at least two layers of the cover film are wound together on a film roll as a material storage and can thus be deducted together on the thermoforming packaging machine from this role.
- this requires only a standardized existing film receptacle for the cover film.
- the layers of the lidding film could also be individually stored on different roles and then brought together.
- Two layers of cover films located on a common film roll can be separated or opened after being pulled off the film roll.
- This is to be understood as meaning that the layers of the cover film adjacent to one another by adhesion or further compounds, such as adhesive layers, are removed from one another. It is necessary to solve this connection so that a gas cushion with oxygen can be built up between these two layers for the subsequent process.
- small particles such as cornstarch are located between the layers to minimize the adhesion that can occur in the roll when rolled up and to minimize the forces involved in separating the layers.
- these films can also have thicknesses of less than 50 microns, higher tensile forces would distort the film, it would cause wrinkles or even a tear or tear.
- the packages are separated from the first sheet-like material, which is transported in the working direction via the transport chain within the thermoforming packaging machine becomes necessary.
- This can be realized by preferably transverse and longitudinal cutting stations, which are located in the working direction behind the sealing station. Alternatively, a complete cut is possible.
- FIG. 1 shows a schematic view of a packaging machine 1 according to the invention in the form of a thermoforming packaging machine.
- This has a forming station 2, a sealing station 3, a cross-cutting device 4 and a longitudinal cutting device 5, which are arranged in this order in a working direction R on a machine frame 6.
- a feed roller 7 On the input side is located on the machine frame 6, a feed roller 7, from which a first web-shaped material 8 is withdrawn.
- a material reservoir 9 is provided, from which a second web-shaped material 10 is withdrawn as a cover film.
- a device 11 for changing a distance 12 of an outer layer 10a and inner layer 10b of the cover sheet 10 is located in the transport direction of the second web material 10 in front of the sealing station 3.
- a discharge device 13 in the form of a conveyor belt is provided on the packaging machine, with the finished individual packages are transported away. Furthermore, the packaging machine 1 to a feed device, not shown, which engages the first web-shaped material 8 side and in the main working cycle in cycles in the working direction R. transported.
- the feed device can be realized, for example, by laterally arranged transport chains.
- the forming station 2 is formed as a thermoforming station in which containers 14 are formed by deep drawing in the first sheet material 8.
- the forming station 2 may be designed such that in the direction perpendicular to the working direction R a plurality of containers are formed side by side.
- an insertion path 15 is provided, in which the containers 14 formed in the first web-shaped material 8 are filled with product 16.
- the sealing station 3 is designed as a closable chamber in which the atmosphere in the containers 14 can be evacuated prior to sealing and subsequently replaced by backgassing with a suitable replacement gas.
- the cross-cutting device 4 is formed as a punch, which cuts through the first web-shaped material 8 and the second web-shaped material 10 in a direction transverse to the working direction R between adjacent containers 14.
- the cross-cutting device 4 operates such that the first web-shaped material 8 is not divided over the entire width, but at least in an edge region is not severed. This allows a controlled onward transport by the feed device.
- the longitudinal cutting device 5 is formed in the illustrated embodiment as a knife assembly, with the first web-shaped material 8 and the second web-like material 10 between adjacent containers 14 and the lateral edge of the first web-shaped material 8 are severed, so that behind the slitter 5 individualized packages are present ,
- a controller 17 takes on the task of executing and monitoring the processes required in the packaging machine.
- the first web-shaped material 8 is withdrawn from the feed roller 7 and transported by the feed device into the forming station 2.
- containers 14 are formed by deep drawing in the first sheet-like material 8.
- the containers 14 are transported along with the surrounding material of the first sheet material 8 in a main working cycle to the insertion path 15, in which they are filled with product 16.
- the filled containers 14 are transported along with the surrounding material of the first sheet material 8 in the main working cycle by the feed device in the sealing station 3.
- the second web-shaped material 10 is transported as a cover film after a first Ansiegelvorgang to the first web-shaped material 8 with the feed movement of the first web-shaped material 8.
- the second web-shaped material 10 is withdrawn from the material storage 9 and moved along the device 11.
- the device 11 causes a spacing of the outer layer 10a of the cover film 10 and the inner layer 10b of the cover film 10 to a distance 12. At the end of the device 11 in the transport direction, the distance is reduced so that both layers together and transported in parallel in the sealing station 3 become.
- the device 11 is shown in a form in which two rollers 18 provide for a varying distance 12. This distance 12 is performed after the material storage 9 by a separate trajectory of the outer layer 10 a of the lid film 10 and the inner layer 10 b of the lid film 10 via the rollers 18. After the rollers 18, the course of the track of both layers is brought together again to the sealing station 3.
- Spacer elements 19, for example maize starch grains, which are located between the outer layer 10a of the cover film 10 and the inner layer 10b of the cover film 10 can be located on only one side of the outer layer 10a of the cover film 10 or the inner layer 10b of the cover film 10, as well as both sides.
- the spacer elements 19 allow on the one hand the function of facilitating separation of the outer layer 10a of the cover film 10 and the inner layer 10b of the lidding film 10 by the low adhesion and on the other hand also a spacing after merging the outer layer 10a of the lidding film 10 and the inner layer 10b of the lidding film 10 in the sealing station, so that the oxygen in the finished packaging between the outer layer 10a of the cover sheet 10 and the inner layer 10b of the cover sheet 10 can diffuse.
- the opened sealing station 3 with a sealing tool upper part 21 and sealing tool lower part 20 contains in the sealing tool upper part 21 a sealing plate 22 and a heat plate 23 fastened to the sealing tool top 21. Between the sealing tool upper part 21, the sealing plate 22 and the heating plate 23 are insulating air gaps. In the illustrated embodiment, contact elements 24 are attached to the heat plate 23.
- the seal plate 22 is movable relative to the seal tool top 21 and the heat plate 23.
- FIG. 3 FIG. 14 illustrates the process of heating the heat plate 23.
- the seal plate 22 has moved toward the heat plate 23 until the seal plate 22 comes in contact with the contact elements 24 on the heat plate 23.
- the heat transfer is realized by heat conduction from the sealing plate 22 to the heat plate 23.
- Sensors 26 detect the temperature of the heat plate 23 and pass this information to the controller 17.
- the controller 17 ensures that the contact 25 remains until the necessary temperature is reached, and initiates the other processes accordingly. It also ensures that the contact of the sealing plate 22 is carried out by the movement against the heat plate 23.
- a next process step is the further transport of the first web-shaped material 8 with the filled containers 14. Then drive, as in FIG. 4 shown, the sealing tool base 20 and the sealing tool shell 21 together, thereby clamp the first web-shaped film web 8 and the second web-like material 10 on all sides in the outer region, and there is a chamber.
- a vacuum is created between the second sheet material (ie lid sheet) 10 and the heat plate 23 via vacuum lines 27. This causes an attraction and subsequent investment of the second sheet material 10 to the heat plate 23 for Heating the second sheet material 10.
- the volume below the second sheet material 10 and the container 14 can now be modified; in particular by evacuation and subsequent (re) gassing by gas exchange in order to achieve an oxygen content of more than 60% by volume for fresh meat products.
- FIG. 5 It is shown that the sealing plate 22 is moved against the sealing tool lower part 20 and clamps the two sheet-like materials 8 and 10 for the sealing process. During this relative movement of the sealing plate 22 to the heating plate 23, the sealing plate 22 does not contact the heating plate 23 again.
- the chamber is vented as in FIG. 6 represented, z. B. by opening the vacuum lines 27 to the surrounding atmosphere.
- the heated film 10 due to the differential pressure between the container interior and the environment and / or due to the shrinkability of the second web material 10, at least partially engages the product like a "second skin" and thus creates an optically attractive package ,
- the hot plate 23 may also include a cooling device, as required for rapid cooling, e.g. a water cooling.
- a cooling device can also prevent overheating of the heat plate 23.
- the contact elements 24 can also be made flexible in the direction of movement of the sealing plate 22 compressible, such as by compression springs, for an even easier relative positioning the sealing plate 22 to the heat plate 23 and also to allow heat transfer with the chamber closed before or during the sealing process.
- contact elements 24 themselves individually and / or together relative to the sealing plate 22 and / or the heating plate 23 to be movable.
- the invention provides a packaging machine in which the spacing of the layers of a multi-layer lid film after the Folienrollollung and re-common feeding into the sealing station causes an air cushion between the two layers is created that after sealing the packaging and the application of the product which projects beyond the sealing plane results in a better distribution of oxygen within the lidding foil or a better supply of oxygen from the inside of the pack and thus the negative discoloration is even further reduced or the reddening is retained even better over a longer period of time.
- a gas cushion between two layers of a lid film is required so that the oxygen can pass through the oxygen permeability of the inner layer 10b of the lid film 10 to the places where at least the inner layer 10b of the lid film 10 is applied to the product 16 and thus a transition of oxygen to the product 16 can take place and discoloration is prevented or minimized.
- the packaging machine is not limited only to a thermoforming packaging machine, it may also be a tray sealing machine.
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Abstract
Description
Die vorliegende Erfindung bezieht sich auf eine Tiefziehverpackungsmaschine gemäß dem Oberbegriff des Anspruchs 1, und auf eine Verpackungsmaschine gemäß dem Oberbegriff des Anspruchs 10.The present invention relates to a thermoforming packaging machine according to the preamble of claim 1, and to a packaging machine according to the preamble of
Die vorliegende Erfindung betrifft eine Maschine zum Herstellen von Verpackungen, insbesondere Verpackungen für Frischfleischprodukte, die einerseits eine lange Lagerbarkeit aufweisen sollen und andererseits noch in der Verkaufsauslage für den Kunden attraktiv aussehen sollen. Um ein Frischfleischprodukt attraktiv aussehen zu lassen, bedarf es eines entsprechenden Sauerstoffgehalts an der Produktoberfläche, um die ansprechende Rötung zu erreichen.The present invention relates to a machine for producing packaging, in particular packaging for fresh meat products, which on the one hand should have a long shelf life and on the other hand should look attractive in the sales display for the customer. In order to make a fresh meat product look attractive, it requires a corresponding oxygen content on the product surface to achieve the appealing redness.
Hierfür gibt es zwei bekannte Verfahren: Zum Einen kann eine Deckelfolie aus einem sauerstoffundurchlässigen Material bestehen, und der Innenraum der Verpackung wird vor dem Versiegeln mit Sauerstoff (rück-) begast, was dafür sorgt, dass sich nach dem Verschließen der Verpackung ein Sauerstoffgehalt von über 60% ergibt. Diese hohe Sauerstoffkonzentration sorgt sowohl für eine lange Lagerbarkeit, als auch für eine dauerhafte Rötung der Produktoberfläche.There are two known methods for this: Firstly, a lidding film made of an oxygen-impermeable material, and the interior of the packaging (fumigation) before sealing with oxygen, which ensures that after closing the packaging, an oxygen content of about 60% results. This high oxygen concentration ensures both a long shelf life and a lasting reddening of the product surface.
Ein alternatives Verfahren besteht in der Verwendung einer mit dem Produkt gefüllte Schale, die mit zwei Deckelfolien versiegelt wird, einer äußeren, sauerstoffundurchlässigen und einer inneren, sauerstoffdurchlässigen Deckelfolie, wobei der Innenraum der Verpackung evakuiert wird und das Produkt durch den geringen Restsauerstoff eine lange Lagerbarkeit erreicht. Die damit auftretende Verfärbung ist optisch mangelhaft, wird aber, bevor die Verpackung in die Verkaufsauslage kommt, durch Entfernen der äußeren, sauerstoffundurchlässigen Deckelfolie revidiert, da nun Sauerstoff durch die innere, sauerstoffdurchlässigen Deckelfolie in die Verpackung diffundieren kann und zu einer wiederherstellbare Rötung des Produktes vor allem im sichtbaren Bereich führt.An alternative method is to use a product-filled tray sealed with two lidding films, an outer, oxygen-impermeable, and an inner, oxygen-permeable lidding film, evacuating the interior of the package and allowing the product to be stored for a long time due to the low residual oxygen , The resulting discoloration is optically inadequate, but is revised before removing the package in the sales display, by removing the outer, oxygen-impermeable lidding foil, since now oxygen can diffuse through the inner, oxygen-permeable lidding foil into the packaging and to a recoverable redness of the product everything in the visible range.
Beide Verfahren sind vorzugsweise für eine Kombination von Verpackung und Produkt geeignet, bei der das Produkt sich als Gesamtes unter der Oberkante (gleichbedeutend mit der Siegelebene) der Verpackungsschale, in die es befüllt wurde, befindet. Würde sich ein Teil der Produktoberfläche oberhalb der Siegelebene befinden, so käme die Deckelfolie mit dem Produkt dort in Berührung und der Sauerstoff aus dem Inneren der Verpackung oder auch der Sauerstoff, der von außen diffundiert, würden nicht an diese Flächen gelangen können. Damit entstehen dort unerwünschte Verfärbungen am Produkt, die der Käufer dieses Produktes als mangelhaft bewertet.Both methods are preferably suitable for a combination of packaging and product, in which the product as a whole under the top edge (equivalent to the Sealing plane) of the packaging tray into which it was filled. If a part of the product surface were located above the sealing plane, then the cover film would come into contact with the product there and the oxygen from the interior of the packaging or also the oxygen which diffuses from the outside would not be able to reach these surfaces. This creates undesirable discolorations on the product, which the buyer of this product rates as deficient.
In der
Solche mehrlagigen Folien besitzen oftmals auch Schrumpfeigenschaften, die eine Stabilität bei Schalen (gleichbedeutend Trays) fordern, die bei Schalen durch den üblichen Rollrand bereitgestellt wird. Daher sind heute Schalenverschließmaschinen ("Traysealer") bekannt, die mit überstehenden Produkten gefüllte Schalen mit den besagten zwei-lagigen Deckelfolien verschließen.Such multilayer films often also have shrinkage properties that require stability in trays (trays) provided by the usual roll edge in trays. Therefore, tray sealers are now known which seal the dishes filled with overhanging products with said two-ply lidding sheets.
Nachteil von Traysealern gegenüber Tiefziehverpackungsmaschinen ist der Kostenaufwand für die Lagerhaltung der zu verarbeitenden Schalen, die fehlende Wertschöpfung in der eigenen Produktion durch den Einkauf dieser Schalen, sowie die mögliche höhere Leistungsdichte der Anzahl der Verpackungen pro Zeiteinheit.Disadvantage of Traysealers over thermoforming packaging machines is the cost of storage of the trays to be processed, the lack of value added in their own production by purchasing these trays, and the possible higher power density of the number of packages per unit time.
Um die Schrumpffähigkeit der Deckelfolien wirken zu lassen, muss diese vor dem Verschließen mit der Schale und dem anschließenden Belüften der Kammer auf eine MindestTemperatur erwärmt werden, damit sich die Folie in diesem Zustand wie eine "zweite Haut" an das Produkt in Teilbereichen anlegt und somit eine sehr attraktive Verpackung darstellt. Dem Fachmann ist bekannt, zu diesem Zweck Deckelfolien in einer Siegelstation durch Anlegen an einer Platte zu erwärmen, um die notwendige Temperatur zu erreichen, die die Schrumpfeigenschaften freigibt. Diese Temperatur liegt aber unter der Siegeltemperatur der Siegelplatte bzw. der Folie.In order to have the shrinkability of the lid films act, it must be heated to a minimum temperature before closing with the shell and then venting the chamber so that the film in this state as a "second skin" applies to the product in some areas and thus represents a very attractive packaging. The person skilled in the art is aware of lid foils in a sealing station for this purpose by applying to heat on a plate to reach the necessary temperature, which releases the shrinkage properties. However, this temperature is below the sealing temperature of the sealing plate or the film.
Eine aufwendige und teure Lösung stellt eine eigene Heizeinrichtung dar, die sich in der Platte befindet und einerseits Platz benötigt und andererseits einen Aufwand erfordert, die Energieleitung für die Heizeinrichtung so nach außen zu führen, dass die Dichtheit der Kammer in geschlossenem Zustand z.B. für den Evakuierprozess oder die Siegelung, nicht außer Kraft gesetzt wird.A complex and expensive solution is a separate heating device, which is located in the plate and on the one hand requires space and on the other hand requires an effort to lead the power line for the heater so that the tightness of the chamber in the closed state, e.g. for the evacuation process or the seal is not overridden.
Einfachere Konstruktionen sehen eine Platte vor, die nur durch die Strahlungswärme der Siegelplatte auf die gewünschte Temperatur gebracht werden soll. Dies ist vor allem nachteilig beim Starten der Verpackungsmaschine, zum Beispiel nach dem Umrüsten auf eine neue Verpackung oder ein neues Produkt, da eine sehr lange Wartezeit entsteht. Außerdem ist dieser Prozess nicht geregelt, sondern setzt voraus, dass dann im folgend laufenden Betrieb die Strahlungswärme der Erwärmung der Platte entspricht.Simpler designs provide for a plate which is to be brought to the desired temperature only by the radiant heat of the sealing plate. This is especially detrimental when starting the packaging machine, for example, after converting to a new packaging or a new product, since a very long waiting period arises. In addition, this process is not regulated, but requires that in the following operation, the radiant heat corresponds to the heating of the plate.
Aufgabe der Erfindung ist es, eine kostengünstige Verpackungsmaschine zu entwickeln, die eine Möglichkeit bietet, die oben genannten Nachteile dennoch zu beseitigen.The object of the invention is to develop a cost-effective packaging machine, which offers a possibility to eliminate the disadvantages mentioned above nevertheless.
Gelöst wird diese Aufgabe mit einer Verpackungsmaschine mit den Merkmalen des Anspruchs 1. Um die Schrumpfeigenschaft der Deckelfolie zu aktivieren, kann es sinnvoll sein, die Deckelfolie auf einen bestimmten Temperaturbereich zu erwärmen, der für den Schrumpfvorgang nach dem Versiegeln auf den Behälter notwendig ist. Dazu werden im Standardfall Wärmeplatten verwendet, die sich bevorzugt in der Siegelstation befinden und geregelt erwärmt werden, um die Erwärmung der Deckelfolie zu bewirken. Als besonders vorteilhaft hat sich es erwiesen, die Wärmeplatte mit mindestens einem Kontakt für den Wärmeübertrag durch Wärmeleitung von der Siegelplatte auszustatten. Dies hat sich als besonders einfach und kostengünstig herzustellen herausgestellt, da keine eigenen Heizeinrichtungen an oder in der Wärmeplatte angebracht werden müssen, deren Energieleitung im Folgenden aufwendig aus der Kammer der Siegelstation vor allem abgedichtet herausgeführt werden müssen. Ebenso kann hier der Platzbedarf für die Wärmeplatte optimiert werden. Es sind Maschinen bekannt, bei denen die Erwärmung der Wärmeplatte nur durch Strahlungswärme der Siegelplatte erfolgt, da die Wärmeplatte üblicherweise über Luft isoliert zur Siegelplatte und einem Siegelwerkzeugoberteil ausgeführt ist. Besonders nachteilig wirkt sich diese herkömmliche Erwärmung beim Starten der Verpackungsmaschine z.B. nach einem Rüstvorgang aus, da die Wartezeit zum Produktionsstart verlängert wird. Durch den erfindungsgemäßen zeitweisen direkten Kontakt zwischen Siegelplatte und Wärmeplatte kann diese Wartezeit auf ein Minimum reduziert werden. Eine Siegelplatte muss nicht einteilig ausgeführt sein, es kann sich dabei auch um eine Heizplatte mit verbundenen Stegen zum Siegeln handeln, ggf. mit einer separaten Bewegbarkeit der Stege relativ zur Heizplatte.This object is achieved with a packaging machine with the features of claim 1. In order to activate the shrinkage property of the cover sheet, it may be useful to heat the cover sheet to a certain temperature range, which is necessary for the shrinking operation after sealing to the container. For this purpose, heat plates are used in the standard case, which are preferably located in the sealing station and are heated in a controlled manner to cause the heating of the lidding film. It has proven to be particularly advantageous to equip the heat plate with at least one contact for the heat transfer by heat conduction from the sealing plate. This has proved to be particularly simple and inexpensive to manufacture, since no own heating devices must be mounted on or in the hot plate, the power line in the following consuming out of the chamber of the sealing station must be led out especially sealed. Likewise, the space required for the hot plate can be optimized here. There are known machines in which the heating of the hot plate is done only by radiant heat of the sealing plate, since the hot plate is usually isolated by air to the sealing plate and a sealing tool shell is executed. Particularly disadvantageous, this conventional heating effect when starting the packaging machine, for example, after a set-up, since the waiting time is extended to the start of production. Due to the inventive temporary direct contact between sealing plate and hot plate this waiting time can be reduced to a minimum. A sealing plate need not be made in one piece, it may also be a heating plate with connected bars for sealing, possibly with a separate mobility of the webs relative to the heating plate.
Der Kontakt zwischen der Wärmeplatte und der Siegelplatte ist vorzugsweise lösbar ausgeführt, damit die Wärmeplatte auch abkühlen kann, falls sich beispielsweise nach dem Rüstvorgang auf eine andere Deckelfolie mit unterschiedlicher Eigenschaft, der Temperaturbereich der Wärmeplatte nach unten verschieben soll. Weiterhin ist es vorteilhaft, eine Abkühlung der Wärmeplatte durch Trennen des Kontaktes zu erreichen, da im Fall eines Rüst- oder Reinigungsvorganges das Bedienpersonal mit Körperteilen an die Fläche der Wärmeplatte gelangen kann und damit die Verletzungsgefahr eingeschränkt werden kann oder die Wartezeit, in der die Wärmeplatte eine unkritische Temperatur erreicht, verringert werden kann.The contact between the heat plate and the sealing plate is preferably designed to be detachable, so that the heating plate can also cool down, for example, if the temperature range of the heating plate is to move downward after the setting-up process on another cover foil with different properties. Furthermore, it is advantageous to achieve a cooling of the heat plate by separating the contact, since in the case of a set-up or cleaning process, the operator can get to the surface of the hot plate with body parts and thus the risk of injury can be limited or the waiting time in which the hot plate reached an uncritical temperature, can be reduced.
In einer bevorzugten Ausführungsform kann die Lösbarkeit des Kontaktes über eine relative Bewegbarkeit der Wärmeplatte, der Siegelplatte und/oder von Kontaktelementen realisiert werden. Diese Bewegungen können konstruktiv einfach und kostengünstig ausgeführt werden, wenn die Wärmeplatte und die Siegelplatte ohnehin lineare Bewegungen für den Prozess des Siegelns in der Siegelstation ausüben. Die Erfindung ermöglicht eine lineare vertikale Bewegung der Siegelplatte zur Wärmeplatte innerhalb der Siegelstation, die sich eignet, die Siegelplatte mit der Wärmeplatte lösbar in Kontakt zu bringen.In a preferred embodiment, the solubility of the contact over a relative mobility of the heat plate, the sealing plate and / or contact elements can be realized. These movements can be performed structurally simple and inexpensive, if the heat plate and the sealing plate anyway perform linear movements for the process of sealing in the sealing station. The invention enables a linear vertical movement of the sealing plate to the heating plate within the sealing station which is adapted to releasably contact the sealing plate with the heating plate.
Diese Bewegung kann bereits bei geöffneter Kammer durchgeführt werden, um die Wärmeplatte für dem Prozess des Siegelns auf die notwendige Temperatur zu erwärmen, um die Zykluszeit des Siegelvorgangs zu optimieren und die Leistung der Verpackungsmaschine zu erhöhen.This movement can already be performed with the chamber open, to heat the heat plate for the sealing process to the necessary temperature, to optimize the cycle time of the sealing operation and to increase the performance of the packaging machine.
In bevorzugter Weise kann die Erwärmung der Deckelfolie durch direkte Berührung an der Wärmeplatte erfolgen, um die Deckelfolie in möglichst kurzer Zeit auf die benötigte Temperatur zu erwärmen, um mit den Folgeprozessen weiter zu verfahren, und um den Durchsatz, hier als Verpackungen pro Zeiteinheit, zu optimieren. Hierzu ist es durch die Erzeugung von Vakuum zwischen der Deckelfolie und der Wärmeplatte bei geschlossener Siegelstation mittels wenigstens einer Vakuumleitung möglich, die Deckelfolie annähernd flächig an die Wärmeplatte anzulegen, um einen optimalen Wärmeübertrag in die Deckelfolie zu erreichen.In a preferred manner, the heating of the lid film can be effected by direct contact with the hot plate to the cover film in the shortest possible time to the required temperature to heat up, to proceed with the subsequent processes, and to optimize the throughput, here as packaging per unit time. For this purpose, it is possible by the generation of vacuum between the lid film and the heat plate with closed sealing station by means of at least one vacuum line to apply the cover sheet approximately flat to the hot plate to achieve optimum heat transfer into the lid film.
Um die Temperatur der Wärmeplatte in dem für den Einsatz notwendigen Wärmeübertrag in die Deckelfolie in einem gewünschten Temperaturbereich zu regeln, ist vorzugsweise wenigstens ein Sensor an oder in der Wärmeplatte vorzusehen. Somit kann eine exakte Temperaturerfassung der Wärmeplatte realisiert werden.In order to regulate the temperature of the heat plate in the heat transfer necessary for the application into the cover film in a desired temperature range, it is preferable to provide at least one sensor on or in the heat plate. Thus, an accurate temperature detection of the heat plate can be realized.
Vorteilhafterweise ist die Verpackungsmaschine mit einer Steuerung ausgerüstet, um wenigstens die Regulierung der Temperatur der Wärmeplatte durchzuführen. Diese kann auch in der Lage sein, die produktspezifischen Daten und/oder die für die Deckelfolie temperaturspezifischen Daten abzuspeichern und bei wiederholender Produktion wieder abrufen zu können und automatisch die Regulierung für die Erwärmung der Wärmeplatte ablaufen zu lassen.Advantageously, the packaging machine is equipped with a controller to perform at least the regulation of the temperature of the hot plate. It may also be able to store the product-specific data and / or the temperature-specific data for the lidding film and retrieve it again during repeated production and automatically run the regulation for heating the hotplate.
Über die Verbindung der Sensoren mit der Steuerung kann der Prozess der Temperaturregulierung zu einer genauen Temperatur in und/oder an der Wärmeplatte führen.By connecting the sensors to the controller, the process of temperature regulation can result in an accurate temperature in and / or on the hot plate.
In besonders bevorzugter Weise kann die Verpackungsmaschine als eine Tiefziehverpackungsmaschine ausgeführt sein, die mit einer Einrichtung der nachfolgend beschriebenen Art zur Trennung und Zusammenführen von einer schrumpffähigen mehrlagigen Deckelfolie und gegebenenfalls der dafür vorteilhaften Erwärmung der Deckelfolie in der Siegelstation mittels einer Wärmeplatte, die über einen Wärmeübertrag durch Kontakt mit der Siegelplatte temperaturreguliert sein kann, ausgestattet sein kann.In a particularly preferred manner, the packaging machine can be designed as a thermoforming packaging machine with a device of the type described below for separating and merging a shrinkable multilayer lid film and optionally the advantageous heating of the lid film in the sealing station by means of a heat plate, which via a heat transfer Contact with the sealing plate can be temperature-regulated, can be equipped.
Die Erfindung manifestiert sich auch in einer Tiefziehverpackungsmaschine mit den Merkmalen des Anspruchs 10.The invention also manifests itself in a thermoforming packaging machine having the features of
Die Tiefziehverpackungsmaschine besitzt eine Formstation, um Behälter in einem ersten bahnförmigen Material, hier als Unterfolie, zu formen, in die im Bereich einer Einlegestrecke Produkte eingelegt werden, die insbesondere die Eigenschaft haben können, dass sie über die Oberkante der geformten Behälter überstehen. In Arbeitsrichtung, welches der Transportrichtung der in die Unterfolie geformten Behälter entspricht, folgend ist eine Siegelstation angeordnet, in der ein zweites bahnförmiges Material als Deckelfolie, insbesondere eine mehrlagige Deckelfolie, auf den Behälter gesiegelt wird und diesen verschließt. Mindestens zwei Lagen der mehrlagigen Deckelfolie werden zuvor in ihrem Abstand zueinander verändert. Dies hat den Vorteil bei mehrlagigen Deckelfolien, dass sich zwischen benachbarten Lagen ein Gaspolster bilden kann, um dafür zu sorgen, dass die äußere Deckelfolie nicht direkt mit dem Produkt in Kontakt kommen kann.The thermoforming packaging machine has a forming station to form containers in a first sheet-like material, here as a lower film, in the area of an insertion path Products are placed, in particular, the property that they can survive beyond the top edge of the molded container. Following in the working direction, which corresponds to the transport direction of the containers formed in the lower film, a sealing station is arranged, in which a second web-like material as a lid film, in particular a multilayer lid film, is sealed onto the container and closes it. At least two layers of the multilayer cover film are previously changed in their distance from each other. This has the advantage in multilayer lidding films that a gas cushion can form between adjacent layers to ensure that the outer lidding film can not come into direct contact with the product.
In einer bevorzugten Ausführungsform kann die Deckelfolie aus einer äußeren, sauerstoffundurchlässigen und einer inneren, sauerstoffdurchlässigen Lage bestehen. In diesem Fall kann das Gaspolster zwischen den Lagen dazu dienen, den Sauerstofffluss zwischen den zwei Lagen zu ermöglichen bzw. zu verbessern. Somit kann der Sauerstoff sicher an die Stellen gelangen, an denen das Produkt mit der inneren, sauerstoffdurchlässigen Lage mit dem Produkt in Kontakt steht bzw. anliegt, so dass eine Verfärbung des insbesondere Frischfleischproduktes verhindert oder zumindest minimiert wird.In a preferred embodiment, the lidding film may consist of an outer, oxygen-impermeable and an inner, oxygen-permeable layer. In this case, the gas cushion between the layers may serve to facilitate or enhance the flow of oxygen between the two layers. Thus, the oxygen can safely reach the points at which the product is in contact or in contact with the product with the inner, oxygen-permeable layer, so that a discoloration of the particular fresh meat product is prevented or at least minimized.
Das Gaspolster kann sich insbesondere dadurch bilden, dass die zwei Lagen der Deckelfolie in Transportrichtung ihren Abstand verringern und nahe aneinander sowie parallel in die Siegelstation transportiert werden.The gas cushion can be formed in particular by the fact that the two layers of the cover film in the transport direction reduce their distance and are transported close to each other and parallel in the sealing station.
Im Bereich der Siegelstation kann durch das Schließen der Kammer und Klemmen im gesamten (allseitigen) äußeren Randbereich ein geschlossenes Volumen erzeugt werden, in welchem sich somit das Gaspolster befindet.In the area of the sealing station, a closed volume can be generated by closing the chamber and clamps in the entire (all-round) outer edge region, in which thus the gas cushion is located.
Bei gemeinsam insbesondere durch Adhäsion aneinanderliegenden Lagen der Deckfolie ist es günstig, diese in einem ersten Schritt durch eine Einrichtung zu beabstanden, um anschließend den Abstand wieder verringern zu können. Das dadurch entstehende Gaspolster kann für einen guten Sauerstofftransport innerhalb mindestens zwei benachbarten Lagen der Deckefolie dienen.In the case of layers of the covering film lying together, in particular by adhesion, it is favorable to space them in a first step through a device, in order subsequently to be able to reduce the distance again. The resulting gas cushion can serve for good oxygen transport within at least two adjacent layers of the cover sheet.
Dieser Prozess findet bevorzugt im Bereich nach der Abrollung der Deckelfolien über oder neben der Siegelstation und vor dem gemeinsamen Transport in die Siegelstation statt. Somit entsteht der Vorteil von einem geringen Platzbedarf und keinem negativen Einfluss auf die Gesamtausführung der Tiefziehverpackungsmaschine. Um negative Einflüsse durch Feuchtigkeit, die sich in der Umgebung befinden kann, zu reduzieren oder sogar auszuschließen, kann dieser Bereich auch durch eine eigene Kammer gekapselt werden, um eine eigene, bevorzugt trockene Atmosphäre erzeugen zu können.This process preferably takes place in the region after the unwinding of the cover films above or next to the sealing station and before the joint transport into the sealing station. Consequently The advantage arises from a small footprint and no negative impact on the overall design of thermoforming packaging machine. In order to reduce or even eliminate negative influences due to moisture which may be present in the environment, this area can also be enclosed by a separate chamber in order to be able to generate its own, preferably dry, atmosphere.
Vorteilhafterweise sind die mindestens zwei Lagen der Deckelfolie gemeinsam auf einer Folienrolle als Materialspeicher aufgewickelt und können somit auf der Tiefziehverpackungsmaschine gemeinsam von dieser Rolle abgezogen werden. Dies erfordert maschinenseitig nur eine standardisierte vorhandene Folienaufnahme für die Deckelfolie. Des weiteren kann es zu keiner Verwechslung in der Kombination von zwei Deckelfolien mit unterschiedlichen Eigenschaften durch den Bediener beim Rüstvorgang kommen. Alternativ könnten die Lagen der Deckelfolie auch einzeln auf unterschiedlichen Rollen bevorratet sein und anschließend zusammengeführt werden.Advantageously, the at least two layers of the cover film are wound together on a film roll as a material storage and can thus be deducted together on the thermoforming packaging machine from this role. On the machine side, this requires only a standardized existing film receptacle for the cover film. Furthermore, there can be no confusion in the combination of two lid films with different properties by the operator during the setup process. Alternatively, the layers of the lidding film could also be individually stored on different roles and then brought together.
Zwei auf einer gemeinsamen Folienrolle befindliche Lagen von Deckelfolien können nach dem Abziehen von der Folienrolle getrennt bzw. geöffnet werden. Hierunter ist zu verstehen, dass die durch Adhäsion oder weitere Verbindungen wie Klebeschichten aneinanderliegenden Lagen der Deckelfolie voneinander entfernt werden. Diese Verbindung gilt es zu lösen, damit für den nachfolgenden Prozess ein Gaspolster mit Sauerstoff zwischen diesen zwei Lagen aufgebaut werden kann. In bevorzugter Form befinden sich kleine Teilchen wie Maisstärkemehl zwischen den Lagen, um die Adhäsion, die in der Rolle im aufgerollten Zustand auftreten kann, minimieren und die Kräfte zum Trennen der Lagen klein halten zu können. Somit treten nur geringe Zugkräfte beim Transport der Deckelfolien auf. Da diese Folien auch Dicken kleiner 50 µm haben können, würden höhere Zugkräfte die Folie verziehen können, es käme zur Faltenbildung oder sogar zu einem Ein- oder Abriss.Two layers of cover films located on a common film roll can be separated or opened after being pulled off the film roll. This is to be understood as meaning that the layers of the cover film adjacent to one another by adhesion or further compounds, such as adhesive layers, are removed from one another. It is necessary to solve this connection so that a gas cushion with oxygen can be built up between these two layers for the subsequent process. In a preferred form, small particles such as cornstarch are located between the layers to minimize the adhesion that can occur in the roll when rolled up and to minimize the forces involved in separating the layers. Thus, only low tensile forces occur during transport of the lidding films. Since these films can also have thicknesses of less than 50 microns, higher tensile forces would distort the film, it would cause wrinkles or even a tear or tear.
Um zu verhindern, dass schrumpffähige Deckelfolien durch die auftretenden Zugkräfte die Verpackung selbst unkontrolliert zusammenziehen und somit eine optisch mangelhafte Verpackung erzeugen, gilt es die geformte Packungsmulde so auszugestalten, dass sich die Verpackung nicht zusammenziehen kann. Dies kann durch eine starke und stabile Folie erreicht werden, die aber einen erhöhten Material- und damit auch Kostenaufwand bedeutet. Bei einer normalen Folie sind seitliche und am Muldenboden eingebrachte Versteifungsrippen notwendig, die aber nicht immer einer ansprechenden Optik genügen und auch im Bereich der Siegelebene nur begrenzt die notwendige Stabilität gegen Querkräfte durch die Schrumpfeigenschaft der Deckelfolien bieten können. Aus der
Aufgrund der besonderen Anforderung an eine lange Lagerbarkeit von Frischfleischprodukten kann es notwendig sein, vor dem Verschließen der Verpackung im Inneren der Siegelkammer eine modifizierte Atmosphäre zu schaffen, die vorzugsweise durch Gasaustausch durchgeführt werden kann, um eine Atmosphäre im Inneren der Verpackung mit einem Sauerstoffgehalt von über 60 Volumenprozent zu erreichen.Due to the particular requirement for a long shelf life of fresh meat products, it may be necessary to create a modified atmosphere inside the sealing chamber prior to sealing the package, which may preferably be carried out by gas exchange, to create an atmosphere inside the package having an oxygen content above To reach 60 volume percent.
Damit einzelne Verpackungen für die weitere Verarbeitung wie Wiegen, Prüfen auf Metallrückstände oder Fremdkörper durch Metalldetektoren oder Röntgengeräte oder Weiterverpackung in Kartonagen zur Verfügung gestellt werden können, ist eine Vereinzelung der Verpackungen aus dem ersten bahnförmigen Material, das über die Transportkette innerhalb der Tiefziehverpackungsmaschine in Arbeitsrichtung transportiert wird, notwendig. Dies kann durch vorzugsweise Quer- und Längsschneidstationen realisiert werden, die sich in Arbeitsrichtung hinter der Siegelstation befinden. Alternativ ist auch ein Komplettschnitt möglich.In order for individual packages to be made available for further processing, such as weighing, testing for metal residues or foreign bodies by metal detectors or X-ray machines or further packaging in cardboard boxes, the packages are separated from the first sheet-like material, which is transported in the working direction via the transport chain within the thermoforming packaging machine becomes necessary. This can be realized by preferably transverse and longitudinal cutting stations, which are located in the working direction behind the sealing station. Alternatively, a complete cut is possible.
Im Folgenden wird ein vorteilhaftes Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. Im Einzelnen zeigen:
- Figur 1
- eine schematische Seitenansicht einer erfindungsgemäßen Tiefziehverpa- ckungsmaschine,
- Figur 2
- eine schematische Seitenansicht im Bereich der Siegelstation einer erfin- dungsgemäßen Verpackungsmaschine bei geöffneter Siegelstation,
Figur 3- eine schematische Seitenansicht im Bereich der Siegelstation einer erfin- dungsgemäßen Verpackungsmaschine und Darstellung des Wärmeübertrags,
- Figur 4
- eine schematische Seitenansicht im Bereich der Siegelstation einer erfin- dungsgemäßen Verpackungsmaschine und Darstellung der geschlossenen Siegelstation,
Figur 5- eine schematische Seitenansicht im Bereich der Siegelstation einer erfin- dungsgemäßen Verpackungsmaschine beim Erwärmen der Deckelfolie und Siegeln,
- Figur 6
- eine schematische Seitenansicht im Bereich der Siegelstation einer erfin- dungsgemäßen Verpackungsmaschine und Darstellung beim Belüften,
- Figur 7
- eine schematische Seitenansicht im Bereich der Siegelstation einer erfin- dungsgemäßen Verpackungsmaschine und Darstellung der geöffneten Sie- gelstation und verpacktem Produkt.
- FIG. 1
- 1 a schematic side view of a thermoforming packaging machine according to the invention,
- FIG. 2
- a schematic side view in the region of the sealing station of an inventive packaging machine with open sealing station,
- FIG. 3
- 1 a schematic side view in the region of the sealing station of a packaging machine according to the invention and illustration of the heat transfer,
- FIG. 4
- 1 is a schematic side view in the region of the sealing station of a packaging machine according to the invention and showing the closed sealing station;
- FIG. 5
- 1 is a schematic side view in the region of the sealing station of a packaging machine according to the invention during heating of the cover film and sealing,
- FIG. 6
- 1 a schematic side view in the region of the sealing station of a packaging machine according to the invention and illustration during aeration,
- FIG. 7
- a schematic side view in the field of sealing station of a packaging machine according to the invention and representation of the opened Siegel station and packaged product.
Gleiche Komponenten werden in den Figuren durchgängig mit gleichen Bezugszeichen versehen.Identical components are provided with the same reference numerals throughout the figures.
In der dargestellten Ausführungsform ist die Formstation 2 als eine Tiefziehstation ausgebildet, in der in dem ersten bahnförmigen Material 8 durch Tiefziehen Behälter 14 geformt werden. Dabei kann die Formstation 2 derart ausgebildet sein, dass in der Richtung senkrecht zur Arbeitsrichtung R mehrere Behälter nebeneinander gebildet werden. In Arbeitsrichtung R hinter der Formstation 2 ist eine Einlegestrecke 15 vorgesehen, in der die in dem ersten bahnförmigen Material 8 geformten Behälter 14 mit Produkt 16 befüllt werden.In the illustrated embodiment, the forming station 2 is formed as a thermoforming station in which
Die Siegelstation 3 ist als verschließbare Kammer ausgebildet, in der die Atmosphäre in den Behältern 14 vor dem Versiegeln evakuiert und anschließend durch Rückbegasen mit einem geeigneten Austauschgas ersetzt werden kann.The sealing
Die Querschneideeinrichtung 4 ist als eine Stanze ausgebildet, die das erste bahnförmige Material 8 und das zweite bahnförmige Material 10 in einer Richtung quer zur Arbeitsrichtung R zwischen benachbarten Behältern 14 durchtrennt. Dabei arbeitet die Querschneideeinrichtung 4 derart, dass das erste bahnförmige Material 8 nicht über die gesamte Breite aufgeteilt wird, sondern zumindest in einem Randbereich nicht durchtrennt wird. Dies ermöglicht einen kontrollierten Weitertransport durch die Vorschubeinrichtung.The cross-cutting device 4 is formed as a punch, which cuts through the first web-shaped
Die Längsschneideeinrichtung 5 ist in der dargestellten Ausführungsform als eine Messeranordnung ausgebildet, mit der das erste bahnförmige Material 8 und das zweite bahnförmige Material 10 zwischen benachbarten Behältern 14 und am seitlichen Rand des ersten bahnförmigen Materials 8 durchtrennt werden, sodass hinter der Längsschneideeinrichtung 5 vereinzelte Verpackungen vorliegen.The
Eine Steuerung 17 übernimmt die Aufgabe, die in der Verpackungsmaschine benötigten Prozesse auszuführen und zu überwachen.A controller 17 takes on the task of executing and monitoring the processes required in the packaging machine.
Die Arbeitsweise der oben beschriebenen Verpackungsmaschine wird im Folgenden dargestellt.The operation of the above-described packaging machine will be described below.
Das erste bahnförmige Material 8 wird von der Zufuhrrolle 7 abgezogen und durch die Vorschubeinrichtung in die Formstation 2 transportiert. In der Formstation 2 werden durch Tiefziehen Behälter 14 in dem ersten bahnförmigen Material 8 gebildet. Die Behälter 14 werden zusammen mit dem umgebenden Material des ersten bahnförmigen Materials 8 in einem Hauptarbeitstakt zu der Einlegestrecke 15 weitertransportiert, in der sie mit Produkt 16 befüllt werden.The first web-shaped
Anschließend werden die befüllten Behälter 14 zusammen mit dem sie umgebenden Material des ersten bahnförmigen Materials 8 in dem Hauptarbeitstakt durch die Vorschubeinrichtung in die Siegelstation 3 weitertransportiert. Das zweite bahnförmige Material 10 wird als Deckelfolie nach einem ersten Ansiegelvorgang an das erste bahnförmige Material 8 mit der Vorschubbewegung des ersten bahnförmigen Materials 8 weitertransportiert. Dabei wird das zweite bahnförmige Material 10 von dem Materialspeicher 9 abgezogen und entlang der Einrichtung 11 bewegt.Subsequently, the filled
Die Einrichtung 11 bewirkt ein Beabstanden der äußeren Lage 10a der Deckelfolie 10 und der inneren Lage 10b der Deckelfolie 10 auf einen Abstand 12. Zum Ende der Einrichtung 11 in Transportrichtung wird der Abstand so verringert, dass beide Lagen gemeinsam und parallel in die Siegelstation 3 weitertransportiert werden.The
Auf diese Weise entsteht ein Luftpolster zwischen der äußeren Lage 10a der Deckelfolie 10 und der inneren Lage 10b der Deckelfolie 10.In this way, an air cushion is formed between the
In
Abstandselemente 19, beispielsweise Maisstärkekörner, die sich zwischen der äußeren Lage 10a der Deckelfolie 10 und der inneren Lage 10b der Deckelfolie 10 befinden, können sich sowohl an nur einer Seite der äußeren Lage 10a der Deckelfolie 10 oder der inneren Lage 10b der Deckelfolie 10 befinden, als auch beidseitig. Die Abstandelemente 19 ermöglichen zum Einen die Funktion des erleichterten Trennens der äußeren Lage 10a der Deckelfolie 10 und der inneren Lage 10b der Deckelfolie 10 durch die geringe Adhäsion und zum Anderen auch eine Beabstandung nach dem Zusammenführen der äußeren Lage 10a der Deckelfolie 10 und der inneren Lage 10b der Deckelfolie 10 in der Siegelstation, damit der Sauerstoff auch in der fertig gestellten Verpackung zwischen der äußeren Lage 10a der Deckelfolie 10 und der inneren Lage 10b der Deckelfolie 10 diffundieren kann.
Die geöffnete Siegelstation 3 mit einem Siegelwerkzeugoberteil 21 und Siegelwerkzeugunterteil 20 beinhaltet im Siegelwerkzeugoberteil 21 eine Siegelplatte 22 und eine an dem Siegelwerkzeugoberteil 21 befestigte Wärmeplatte 23. Zwischen dem Siegelwerkzeugoberteil 21, der Siegelplatte 22 und der Wärmeplatte 23 sind isolierende Luftspalte vorhanden. In der dargestellten Ausführung sind Kontaktelemente 24 an der Wärmeplatte 23 angebracht. Die Siegelplatte 22 ist relativ zum Siegelwerkzeugoberteil 21 und der Wärmeplatte 23 bewegbar.The opened sealing
Die
Ein nächster Prozessschritt ist der Weitertransport des ersten bahnförmigen Materials 8 mit den befüllten Behältern 14. Anschließend fahren, wie in
Um das zweite bahnförmige Material 10 an die erwärmte Wärmeplatte 23 anzulegen, wird über Vakuumleitungen 27 ein Vakuum zwischen dem zweiten bahnförmigen Material (d.h. der Deckelfolie) 10 und der Wärmeplatte 23 erzeugt. Dies bewirkt eine Anziehung und eine anschließende Anlage des zweiten bahnförmigen Materials 10 an die Wärmeplatte 23 zur Erwärmung des zweiten bahnförmigen Materials 10. Das Volumen unter dem zweiten bahnförmigen Material 10 und dem Behälter 14 kann nun modifiziert werden; insbesondere durch Evakuieren und anschließendes (Rück-) Begasen durch Gasaustausch, um für Frischfleischprodukte einen Sauerstoffgehalt von über 60 Volumenprozent zu erreichen.In order to apply the
In
Nach dem Versiegeln des ersten bahnförmigen Materials 8 mit dem zweiten bahnförmigen Material 10 wird die Kammer belüftet, wie in
In
Die Erfindung ist nicht beschränkt auf das dargestellte Ausführungsbeispiel, sondern lässt weitere folgende Alternativen zu.The invention is not limited to the illustrated embodiment, but allows for further following alternatives.
Die Wärmeplatte 23 kann bei Bedarf einer schnellen Kühlung auch zusätzlich eine Kühleinrichtung beinhalten, z.B. eine Wasserkühlung. Eine Kühleinrichtung kann auch ein Überhitzen der Wärmeplatte 23 verhindern.The
Es können auch eigene Heizelemente in oder an der Wärmeplatte 23 angebracht sein, die über die Steuerung 17 für die notwendige Erwärmung der Wärmeplatte 23 sorgen.It is also possible to have separate heating elements in or on the
Die Kontaktelemente 24 können auch flexibel in Bewegungsrichtung der Siegelplatte 22 stauchbar ausgeführt, wie z.B. durch Druckfedern, um eine noch einfachere Relativpositionierung der Siegelplatte 22 zur Wärmeplatte 23 und auch einen Wärmeübertrag bei geschlossener Kammer vor oder während des Siegelvorganges zu ermöglichen.The
Es können auch die Kontaktelemente 24 selbst einzeln und/oder zusammen relativ zur Siegelplatte 22 und/oder der Wärmeplatte 23 bewegbar sein.It is also the
Die Erfindung stellt eine Verpackungsmaschine zur Verfügung, bei der das Beabstanden der Lagen einer mehrlagigen Deckelfolie nach der Folienabrollung und dem wieder gemeinsamen Zuführen in die Siegelstation dazu führt, dass ein Luftpolster zwischen den zwei Lagen entsteht, dass nach dem Verschließen der Verpackung und dem Anlegen an das über die Siegelebene überstehende Produkt eine bessere Sauerstoffverteilung innerhalb der Deckelfolie bzw. eine bessere Zuführung von Sauerstoff aus dem Packungsinneren entsteht und somit sich die negative Verfärbung noch weiter reduziert bzw. die Rötung noch besser über eine längere Zeit erhalten bleibt.The invention provides a packaging machine in which the spacing of the layers of a multi-layer lid film after the Folienrollollung and re-common feeding into the sealing station causes an air cushion between the two layers is created that after sealing the packaging and the application of the product which projects beyond the sealing plane results in a better distribution of oxygen within the lidding foil or a better supply of oxygen from the inside of the pack and thus the negative discoloration is even further reduced or the reddening is retained even better over a longer period of time.
Speziell für Produkte, die über die Siegelebene 28 der Behälter 14 überstehen, wird ein Gaspolster zwischen zwei Lagen einer Deckelfolie benötigt, damit der Sauerstoff durch die Sauerstoffdurchlässigkeit der inneren Lage 10b der Deckelfolie 10 auch an die Stellen gelangen kann, an denen wenigstens die innere Lage 10b der Deckelfolie 10 am Produkt 16 anliegt und somit ein Übergang des Sauerstoffs auf das Produkt 16 erfolgen kann und eine Verfärbung verhindert bzw. minimiert wird.Especially for products that survive on the sealing plane 28 of the
Die Verpackungsmaschine ist nicht nur auf eine Tiefziehverpackungsmaschine eingeschränkt, es kann sich auch um eine Schalenverschließmaschine handeln.The packaging machine is not limited only to a thermoforming packaging machine, it may also be a tray sealing machine.
Claims (17)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11003341A EP2360098A1 (en) | 2009-05-13 | 2010-04-21 | Packaging machine for multi-layer covering film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009020898.4A DE102009020898B4 (en) | 2009-05-13 | 2009-05-13 | Thermoforming packaging machine for multilayer lidding film |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11003341.2 Division-Into | 2011-04-20 |
Publications (3)
Publication Number | Publication Date |
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EP2251265A2 true EP2251265A2 (en) | 2010-11-17 |
EP2251265A3 EP2251265A3 (en) | 2011-03-23 |
EP2251265B1 EP2251265B1 (en) | 2012-12-26 |
Family
ID=42358234
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10004250A Not-in-force EP2251265B1 (en) | 2009-05-13 | 2010-04-21 | Packaging machine |
EP11003341A Withdrawn EP2360098A1 (en) | 2009-05-13 | 2010-04-21 | Packaging machine for multi-layer covering film |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11003341A Withdrawn EP2360098A1 (en) | 2009-05-13 | 2010-04-21 | Packaging machine for multi-layer covering film |
Country Status (4)
Country | Link |
---|---|
US (1) | US8544245B2 (en) |
EP (2) | EP2251265B1 (en) |
DE (1) | DE102009020898B4 (en) |
ES (1) | ES2398457T3 (en) |
Cited By (4)
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EP2815983A1 (en) * | 2013-06-18 | 2014-12-24 | Jörg von Seggern Maschinenbau GmbH | Method and apparatus for sealing a film on a tray |
EP3083411B1 (en) | 2013-12-16 | 2017-10-18 | Cryovac, Inc. | Apparatus and process for packaging a product |
CN110891865A (en) * | 2017-07-14 | 2020-03-17 | 麦克夫股份有限公司 | Method and sealing machine for sealing partially prepared dish ingredients |
US10919654B2 (en) | 2016-01-20 | 2021-02-16 | Gea Food Solutions Germany Gmbh | Sealing tool with recess and transition region |
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DE102010004635B4 (en) * | 2010-01-14 | 2011-09-22 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | sealing tool |
ES2397939T3 (en) * | 2010-10-12 | 2013-03-12 | Multivac Sepp Haggenmüller Gmbh & Co Kg | Closing station and procedure for cutting a cover sheet |
DE102010048420B4 (en) | 2010-10-15 | 2024-01-11 | Gea Food Solutions Germany Gmbh | Packaging machine with a heating element |
WO2013006545A1 (en) * | 2011-07-01 | 2013-01-10 | Sunbeam Products, Inc. | Sealing apparatus |
DE102012006696A1 (en) * | 2012-03-30 | 2013-10-02 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Packaging machine with a sealing device |
AR092297A1 (en) * | 2012-04-04 | 2015-04-15 | Nestec Sa | SYSTEMS AND METHODS FOR MANUFACTURING MULTICOMPARTIMENTAL PRODUCTS CONTAINING DRY AND DRY COMPONENTS |
KR101446060B1 (en) * | 2012-06-07 | 2014-10-01 | 김성희 | food vessel packing apparatus |
ES2527611B1 (en) * | 2013-07-24 | 2015-11-04 | Ulma Packaging Technological Center, S.Coop. | Modified atmosphere, second skin or vacuum packaging machine, and method |
EP3028774A1 (en) * | 2014-12-03 | 2016-06-08 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Packaging system including a deep draw packaging machine |
US20180022490A1 (en) * | 2016-07-21 | 2018-01-25 | Ross Industries, Inc. | Vacuum sealing system, apparatus, and method |
EP3311980B1 (en) * | 2016-10-19 | 2021-02-24 | Mondini S.r.l. | Method for making a containment element and apparatus for heat-sealing a covering film to an annular band of a containment element |
WO2018081141A1 (en) * | 2016-10-26 | 2018-05-03 | Holographyx Inc. | Pharmaceutical packs comprising holographic lidding material, and method of making the same |
US11701298B2 (en) * | 2016-10-26 | 2023-07-18 | Holographyx Inc. | Pharmaceutical packs comprising holographic lidding material, and method of making the same |
EP3315422B1 (en) * | 2016-10-28 | 2019-01-02 | Ulma Packaging Technological Center, S. Coop | Skin packaging machine |
US11034474B2 (en) * | 2016-10-31 | 2021-06-15 | Ross Industries, Inc. | Dual purpose seal head assembly, tray sealing system, and method therefor |
DE102016123569A1 (en) * | 2016-12-06 | 2018-06-07 | Multivac Sepp Haggenmüller Se & Co. Kg | Tray sealing machine |
EP3409600B1 (en) * | 2017-06-02 | 2019-12-11 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Tray sealing maschine |
US11472579B2 (en) | 2018-12-04 | 2022-10-18 | Gpcp Ip Holdings Llc | Film securing apparatus and method |
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CN109484690B (en) * | 2018-10-30 | 2020-11-20 | 温岭市骏马食品有限公司 | Fresh-keeping equipment convenient to use |
DE102020201284A1 (en) * | 2020-02-03 | 2021-08-05 | Multivac Sepp Haggenmüller Se & Co. Kg | Thermoforming packaging machine with vacuum cooling station and process for vacuum cooling of hot-packed products |
CN112340135A (en) * | 2020-10-27 | 2021-02-09 | 上海诺信汽车零部件有限公司 | Automatic packing plant with antistatic and clean function |
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- 2010-04-21 ES ES10004250T patent/ES2398457T3/en active Active
- 2010-04-21 EP EP11003341A patent/EP2360098A1/en not_active Withdrawn
- 2010-05-12 US US12/778,196 patent/US8544245B2/en not_active Expired - Fee Related
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EP2815983A1 (en) * | 2013-06-18 | 2014-12-24 | Jörg von Seggern Maschinenbau GmbH | Method and apparatus for sealing a film on a tray |
EP3083411B1 (en) | 2013-12-16 | 2017-10-18 | Cryovac, Inc. | Apparatus and process for packaging a product |
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Also Published As
Publication number | Publication date |
---|---|
US8544245B2 (en) | 2013-10-01 |
US20100287881A1 (en) | 2010-11-18 |
ES2398457T3 (en) | 2013-03-19 |
EP2251265B1 (en) | 2012-12-26 |
DE102009020898B4 (en) | 2014-05-28 |
EP2360098A1 (en) | 2011-08-24 |
DE102009020898A1 (en) | 2010-11-18 |
EP2251265A3 (en) | 2011-03-23 |
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