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EP3858749A1 - Deep drawing packaging machine with vacuum cooling station and method for vacuum cooling hot-packed products - Google Patents

Deep drawing packaging machine with vacuum cooling station and method for vacuum cooling hot-packed products Download PDF

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Publication number
EP3858749A1
EP3858749A1 EP20214878.9A EP20214878A EP3858749A1 EP 3858749 A1 EP3858749 A1 EP 3858749A1 EP 20214878 A EP20214878 A EP 20214878A EP 3858749 A1 EP3858749 A1 EP 3858749A1
Authority
EP
European Patent Office
Prior art keywords
packaging machine
vacuum cooling
station
thermoforming packaging
cooling station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20214878.9A
Other languages
German (de)
French (fr)
Inventor
Alexander STÖTZNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
Original Assignee
Multivac Sepp Haggenmueller GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Multivac Sepp Haggenmueller GmbH and Co KG filed Critical Multivac Sepp Haggenmueller GmbH and Co KG
Priority to EP24153268.8A priority Critical patent/EP4335759A3/en
Publication of EP3858749A1 publication Critical patent/EP3858749A1/en
Pending legal-status Critical Current

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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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/16—Feeding webs from rolls by rollers
    • 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
    • B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
    • B65B63/08—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for heating or cooling articles or materials to facilitate packaging
    • 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
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/001—Packaging other articles presenting special problems of foodstuffs, combined with their conservation
    • 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/16—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to stop, or to control the speed of, the machine as a whole
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/04—Machines constructed with readily-detachable units or assemblies, e.g. to facilitate maintenance
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • B65B7/164—Securing by heat-sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • 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
    • B65B2220/00—Specific aspects of the packaging operation
    • B65B2220/24—Cooling filled packages

Definitions

  • the invention relates to a deep-drawing packaging machine according to the preamble of claim 1.
  • the invention also relates to a method according to the preamble of claim 14.
  • thermoforming packaging machines are used to produce packaging in the form of troughs, the products packed therein being filled into the troughs produced along a filling path of the thermoforming packaging machine and the filled troughs then being transported to a sealing station for sealing the troughs.
  • the products placed in the troughs are hot products, for example pre-cooked ravioli, they can be slightly cooled using an evacuation process carried out within the sealing station. However, it may be that the associated cooling effect is not sufficient to cool the products to a desired temperature level before the sealing process, since the evacuation phase used within the sealing station does not last long enough. Enclosing products that are too hot can, however, lead to undesirable precipitation settling inside the sealed packaging.
  • the DE 296 07 689 U1 discloses a thermoforming packaging machine with a sealing station, which is followed in the transport direction by a mechanical cooling device which, by means of cooling cushions mounted thereon, presses on sealed packages from above and below in order to cool them downstream of the sealing station after the sealing process.
  • the invention is based on the object of providing a thermoforming packaging machine and a method with which, in particular, products to be packaged hot can be packaged with a constant pack quality and an increased machine output rate.
  • the deep-drawing packaging machine comprises a forming station for deep-drawing wells in a film, a filling line for filling the wells with products and a Sealing station for sealing the hollows.
  • the thermoforming packaging machine has at least one vacuum cooling station upstream of the sealing station in the transport direction, which is designed for vacuum cooling of the products inserted into the troughs along the insertion path. Hot inserted products can thus already be pre-cooled to a desired (pre) temperature level on the thermoforming packaging machine, at a point upstream of the sealing station in the transport direction, before they are transported to the sealing station for the sealing process.
  • this ensures that the hot-filled products along the insertion path are already cooled before entering the sealing station in such a way that the evacuation process carried out within the sealing station only needs to provide a reduced cooling capacity in order to bring the products to a desired temperature level before the sealing process .
  • the actively controlled product cooling thus starts with the invention already in front of the sealing station, within the separate vacuum cooling station according to the invention. In this way, the products can be brought to a predetermined temperature level in a particularly efficient manner, precisely and in a timed manner with regard to the sealing process.
  • the vacuum cooling station and the sealing station are preferably in the form of spatially separated work stations on the thermoforming packaging machine and are each configured to form at least one hermetically sealable evacuation chamber. In this way, the cooling of the hot-filled products can be distributed specifically to different work stations, so that the products can be cooled down to a desired temperature level more effectively due to the successive cooling effects achieved.
  • the vacuum cooling station comprises several hermetically sealable evacuation chambers which are arranged one behind the other in the transport direction.
  • several evacuation chambers are used on the thermoforming packaging machine upstream of the sealing station, by means of which the products passed through it can be gradually cooled so that the cooling process can be divided over several machine work cycles. This leads to a significantly increased machine output with consistent pack quality. This allows the products to be cooled particularly gently, i.e. slightly per cooling chamber.
  • the vacuum cooling station provides a separate vacuum pump.
  • the vacuum cooling station can carry out the evacuation process independently of other work stations of the thermoforming packaging machine, so to speak as an autarkically functioning one Workstation.
  • the operation of the vacuum pump of the vacuum cooling station is independent of the operation of a vacuum pump used at the sealing station, so that the cooling process at the vacuum cooling station can be better controlled in a product-specific manner.
  • the evacuation processes taking place at the sealing station and the vacuum cooling station can be carried out simultaneously with one another by means of a common vacuum pump.
  • the sealing station and the vacuum cooling station have, so to speak, the same vacuum pump.
  • the vacuum cooling station has at least one filter unit for a ventilation process.
  • the vacuum cooling station can be ventilated using filtered air, which prevents the product from being contaminated with germs.
  • the sealing station and the vacuum cooling station in particular their chamber walls, can preferably be heated to a predetermined temperature level. In this way, a precipitation of moisture on the sealing station and the vacuum cooling station can be prevented, or at least reduced, in a targeted manner.
  • the thermoforming packaging machine preferably has at least one capacitor for the targeted removal of moisture.
  • moisture can be separated from the evacuated air of the sealing station and / or the vacuum cooling station in a targeted manner by means of the condenser, which in particular leads to a hygienic operation of the thermoforming packaging machine.
  • the sealing station and / or the vacuum cooling station conduct evacuation air from the respective evacuation chambers via heated lines to the condenser, on which the moisture can be separated from the heated evacuation air.
  • the vacuum cooling station can preferably be attached to a machine frame of the thermoforming packaging machine upstream of the sealing station, optionally at different positions. This means that the vacuum cooling station can be used flexibly for pre-cooling products filled with different temperatures.
  • a variant provides a linear guide on the machine frame, on which the vacuum cooling station is mounted so as to be displaceable in the transport direction.
  • the vacuum cooling station is configured in the form of a rollable trolley unit which can be temporarily fixedly positioned on the thermoforming packaging machine, in particular on its machine frame. This enables mobile use of the vacuum cooling station on the thermoforming packaging machine.
  • the vacuum cooling station in the form of a rollable trolley unit is particularly suitable for service and cleaning purposes.
  • the vacuum cooling station can have a protective gas device which is designed for the subsequent gassing of the products vacuum-cooled therein. This means that the filled products can be provided with a kind of gas envelope for onward transport.
  • Opening and closing of the vacuum cooling station can preferably be synchronized with opening and closing of the sealing station positioned downstream in the transport direction. It would be conceivable that the opening and closing of the vacuum cooling station is triggered by the opening and closing of the sealing station.
  • the thermoforming packaging machine preferably has a controller for controlling and monitoring the processes running at the vacuum cooling station, regardless of the form in which the vacuum cooling station and / or at what point the vacuum cooling station is upstream of the sealing station on the thermoforming packaging machine.
  • This can in particular be the same control that is also provided for controlling other work stations of the thermoforming packaging machine, for example the sealing station and / or the forming station initially positioned on the machine frame for producing the wells.
  • One variant provides that, with regard to a product temperature detected along the insertion section, an evacuation pressure that can be varied at the vacuum cooling station can be activated and / or an evacuation pressure curve running therein can be controlled, for example in the form of a controlled pressure curve.
  • an evacuation pressure that can be varied at the vacuum cooling station can be activated and / or an evacuation pressure curve running therein can be controlled, for example in the form of a controlled pressure curve.
  • the cooling process within the vacuum cooling station can be carried out product-specifically in view of the measured product temperatures, so that products with a uniform product temperature can be sealed within the sealing station.
  • the products can thus be fed to the sealing station at a desired product temperature, so that packaging with constant product quality can be sealed therein.
  • the vacuum cooling station has a temperature measuring unit, for example in the form of a temperature sensor or a thermal imaging camera, by means of which the product temperature of a product available immediately in front of the vacuum cooling station can be recorded, based on which the evacuation process can be controlled.
  • the temperature measuring unit can be present as a separate unit upstream of the vacuum cooling station.
  • the invention also relates to a method for cooling products which are placed in troughs along a filling path of a thermoforming packaging machine.
  • the products placed in troughs are outside a sealing station, inside an in The vacuum cooling station of the thermoforming packaging machine upstream of the sealing station is cooled by means of a controlled evacuation process.
  • the products placed in the troughs reach a reduced temperature level outside the sealing station, from which the subsequent processes carried out within the sealing station allow better packaging of consistent quality to be produced.
  • the cooling of the products upstream of the sealing station actively controlled within the vacuum cooling station, already leads to an at least partial cooling effect, which favors the processes subsequently taking place within the sealing station.
  • the products can be brought precisely to a desired temperature level until the sealing process is carried out.
  • Fig. 1 shows an intermittently operating thermoforming packaging machine 1 according to the invention.
  • a feed roller 8 On the input side, on the machine frame 7, there is a feed roller 8, from which a lower film 9 is pulled off.
  • the thermoforming packaging machine 1 has a transport chain 10 which grips the lower film 9 and transports it further in the transport direction R per main work cycle.
  • the forming station 2 is designed as a deep-drawing station in which depressions 11 are formed in the lower film 9 by deep-drawing, for example by means of compressed air and / or vacuum.
  • the forming station 2 can be designed in such a way that a plurality of troughs 11 are formed next to one another in the direction perpendicular to the transport direction R.
  • An insertion section 12 is provided downstream of the forming station 2 in the transport direction R, in which the troughs 11 formed in the lower film 9 are filled with products 13.
  • the vacuum cooling station 3 has a hermetically sealable chamber 3a in which the atmosphere in the troughs 11 can be evacuated. To evacuate the chamber 3 a, the vacuum cooling station 3 has a vacuum pump 16.
  • Fig. 1 further shows that the vacuum cooling station 3 comprises a protective gas device 17 which is designed for gassing the vacuum-cooled products 13.
  • the products 13 transported into the vacuum cooling station 3 can thus be both vacuum-cooled and gas-flushed with an exchange gas or a gas mixture.
  • the sealing station 4 has a hermetically sealable chamber 4a in which the atmosphere in the troughs 11 immediately before sealing with an upper film 15, e.g. B. evacuated and / or replaced by gas purging with a replacement gas or with a gas mixture.
  • an upper film 15 e.g. B. evacuated and / or replaced by gas purging with a replacement gas or with a gas mixture.
  • the cross-cutting device 5 can be designed as a punch which cuts through the lower film 9 and the upper film 15 in a direction transverse to the transport direction R between adjacent troughs 11.
  • the cross-cutting device 5 works in such a way that the lower film 9 is not severed over the entire width, so that the film is not severed at least in one edge area. This enables a controlled further transport through the transport chain 10.
  • the longitudinal cutting device 6 can be designed as a knife arrangement with which the lower film 9 and the upper film 15 are severed between adjacent troughs 11 and on the side edge of the lower film 9 in the transport direction R, so that individual packagings V are present behind the longitudinal cutting device 6.
  • the thermoforming packaging machine 1 also has a controller 18. Its task is to control and monitor the processes running in the thermoforming packaging machine 1 at the work stations.
  • a display device 19 with operating elements 20 is used to visualize or influence the process sequences in the thermoforming packaging machine 1 for or by an operator.
  • the vacuum cooling station 3 and the sealing station 4 are designed in the form of spatially separated work stations on the thermoforming packaging machine 1.
  • the sealing station 4 has its own vacuum pump 21 for carrying out an evacuation process within the evacuation chamber 4a.
  • the vacuum pump 16 of the vacuum cooling station 3 and the vacuum pump 21 of the sealing station 4 are therefore located as separate vacuum pumps 16, 21, which can be controlled separately from one another by means of the controller 18.
  • FIG. 1 shows Fig. 1 in dashed lines that the vacuum cooling station 3 positioned upstream of the sealing station 4 can have two or even more evacuation chambers 3a for carrying out successive vacuum cooling processes.
  • the products 13 can thus be cooled particularly gently.
  • FIG. 1 schematically that the vacuum cooling station 3 has a filter unit 22 through which, after vacuum cooling by means of a ventilation process, filtered, sterile air flows into the chamber 3a.
  • Fig. 1 also shows a temperature measuring unit 25 by means of which a product temperature T of the products 13 transported past underneath can be measured.
  • a temperature measuring unit 25 by means of which a product temperature T of the products 13 transported past underneath can be measured.
  • an evacuation pressure and / or an evacuation pressure curve for the respective evacuation processes within the downstream vacuum cooling station 3 can preferably be set automatically with regard to the detected product temperature T.
  • Fig. 2 shows the thermoforming packaging machine 1 from Fig. 1
  • the vacuum cooling station 3 is configured in the form of a rollable carriage unit 23, which is located on the thermoforming packaging machine 1 upstream of the sealing station 4 in order to cool products 13 transported through it by means of an evacuation process before they reach the downstream sealing station 4.
  • the carriage unit 23 forms a mobile module which is particularly suitable for flexible use on various types of thermoforming packaging machines, since its positioning between the insertion section 12 and the sealing station 4 can be freely selected.
  • Fig. 3 shows the thermoforming packaging machine 1 with a vacuum cooling station 3 designed as a multi-chamber vacuum cooling station, which is positioned in the transport direction R immediately upstream of the sealing station 4.
  • the respective evacuation processes carried out one after the other within the chambers 3 a of the vacuum cooling station 3 lead to a gradual, controlled vacuum cooling of the products 13 before they are transported to the sealing station 4 to close the troughs 11 with the upper film 15.
  • the vacuum cooling station 3 and the sealing station 4 are designed as directly adjacent work stations, whereby an integral structure is even conceivable for both.
  • Fig. 3 also shows that the thermoforming packaging machine 1 has a capacitor 24 which is used for targeted removal of moisture is configured.
  • the condenser 24 can also be used in connection with the vacuum cooling station 3 Figure 1 and Figure 2 can be used.
  • An evacuation line 4b leads from the sealing station 4 to the condenser 24. Also, respective evacuation lines 3b lead from the chambers 3a of the vacuum cooling station 3 to the condenser 24.
  • the evacuation lines 3b, 4b are preferably designed to be heatable, so that moisture is only separated in a targeted manner at the condenser 24 the air evacuated from the chambers 3a, 4a happens.
  • the present invention makes it possible, along the infeed section 12 of the deep-drawing packaging machine 1, to cool down hot-inserted products 13 by means of vacuum cooling, possibly in stages through a multi-chamber cooling system, to a desired temperature level before they reach the sealing station 4, so that the sealing process carried out within the sealing station 4 is more economical and can be carried out with consistent packaging quality.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Vacuum Packaging (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

Die Erfindung betrifft eine Tiefziehverpackungsmaschine (1) mit einer Formstation (2) zum Tiefziehen von Mulden (11) in eine Folie (9), einer Einfüllstrecke (12) zum Befüllen von Produkten (13) in die Mulden (11) und mit einer Siegelstation (4) zum Versiegeln der Mulden (11), dadurch gekennzeichnet, dass die Tiefziehverpackungsmaschine (1) in Transportrichtung (R) stromaufwärts der Siegelstation (4) mindestens eine Vakuumkühlstation (3) aufweist, die zum Vakuumkühlen der entlang der Einfüllstrecke (12) in die Mulden (11) eingelegten Produkte (13) ausgebildet ist. Ferner bezieht sich die Erfindung auf ein Verfahren zum Vakuumkühlen von Produkten (13).The invention relates to a deep-drawing packaging machine (1) with a forming station (2) for deep-drawing wells (11) in a film (9), a filling line (12) for filling products (13) into the wells (11) and with a sealing station (4) for sealing the wells (11), characterized in that the deep-drawing packaging machine (1) has at least one vacuum cooling station (3) in the transport direction (R) upstream of the sealing station (4), which is used for vacuum cooling of the in the troughs (11) inserted products (13) is formed. The invention also relates to a method for vacuum cooling of products (13).

Description

Die Erfindung bezieht sich auf eine Tiefziehverpackungsmaschine gemäß dem Oberbegriff des Anspruchs 1. Weiter betrifft die Erfindung ein Verfahren gemäß dem Oberbegriff des Anspruchs 14.The invention relates to a deep-drawing packaging machine according to the preamble of claim 1. The invention also relates to a method according to the preamble of claim 14.

Derartige Tiefziehverpackungsmaschinen werden zum Herstellen von Verpackungen in Muldenform eingesetzt, wobei die darin verpackten Produkte entlang einer Einfüllstrecke der Tiefziehverpackungsmaschine in die hergestellten Mulden gefüllt werden und die befüllten Mulden im Anschluss daran in eine Siegelstation zum Versiegeln der Mulden transportiert werden.Such thermoforming packaging machines are used to produce packaging in the form of troughs, the products packed therein being filled into the troughs produced along a filling path of the thermoforming packaging machine and the filled troughs then being transported to a sealing station for sealing the troughs.

Sofern es sich bei den in die Mulden eingelegten Produkten um heiße Produkte, beispielsweise vorgekochte Maultaschen, handelt, können diese anhand eines innerhalb der Siegelstation durchgeführten Evakuierungsvorgangs geringfügig gekühlt werden. Es kann jedoch sein, dass der damit einhergehende Kühleffekt nicht ausreichend ist, um die Produkte vor dem Siegelvorgang auf ein gewünschtes Temperaturniveau abzukühlen, da die innerhalb der Siegelstation eingesetzte Evakuierungsphase nicht ausreichend lange andauert. Das Einschließen zu heißer Produkte kann aber dazu führen, dass sich unerwünscht innerhalb der versiegelten Verpackungen Niederschlag absetzt.If the products placed in the troughs are hot products, for example pre-cooked ravioli, they can be slightly cooled using an evacuation process carried out within the sealing station. However, it may be that the associated cooling effect is not sufficient to cool the products to a desired temperature level before the sealing process, since the evacuation phase used within the sealing station does not last long enough. Enclosing products that are too hot can, however, lead to undesirable precipitation settling inside the sealed packaging.

Die DE 296 07 689 U1 offenbart eine Tiefziehverpackungsmaschine mit einer Siegelstation, welcher in Transportrichtung eine mechanische Kühlvorrichtung nachgelagert ist, welche mittels daran montierter Kühlkissen von oben und unten auf versiegelte Verpackungen drückt, um diese nach dem Siegelprozess, stromabwärts der Siegelstation abzukühlen.the DE 296 07 689 U1 discloses a thermoforming packaging machine with a sealing station, which is followed in the transport direction by a mechanical cooling device which, by means of cooling cushions mounted thereon, presses on sealed packages from above and below in order to cool them downstream of the sealing station after the sealing process.

Der Erfindung liegt die Aufgabe zugrunde, eine Tiefziehverpackungsmaschine sowie ein Verfahren zur Verfügung zu stellen, womit sich insbesondere heiß zu verpackende Produkte mit gleichbleibender Packungsqualität sowie gesteigerter Maschinenausbringungsrate verpacken lassen.The invention is based on the object of providing a thermoforming packaging machine and a method with which, in particular, products to be packaged hot can be packaged with a constant pack quality and an increased machine output rate.

Diese Aufgabe wird gelöst durch eine Tiefziehverpackungsmaschine gemäß Anspruch 1 sowie mittels eines Verfahrens gemäß Anspruch 14. Vorteilhafte Weiterbildungen der Erfindungen sind in den Unteransprüchen angegeben.This object is achieved by a deep-drawing packaging machine according to claim 1 and by means of a method according to claim 14. Advantageous developments of the inventions are specified in the subclaims.

Die erfindungsgemäße Tiefziehverpackungsmaschine umfasst eine Formstation zum Tiefziehen von Mulden in eine Folie, eine Einfüllstrecke zum Befüllen der Mulden mit Produkten sowie eine Siegelstation zum Versiegeln der Mulden. Erfindungsgemäß weist die Tiefziehverpackungsmaschine in Transportrichtung stromaufwärts der Siegelstation mindestens eine Vakuumkühlstation auf, die zum Vakuumkühlen der entlang der Einlegestrecke in die Mulden eingelegten Produkte ausgebildet ist. Heiß eingelegte Produkte können damit bereits an der Tiefziehverpackungsmaschine, an einer der Siegelstation in Transportrichtung vorgelagerten Stelle, auf ein gewünschtes (Vor-)Temperaturniveau vorgekühlt werden, bevor sie für den Siegelvorgang in die Siegelstation transportiert werden. Damit wird insbesondere erreicht, dass die entlang der Einlegestrecke heiß befüllten Produkte bereits vor Eintritt in die Siegelstation derart abgekühlt sind, dass der innerhalb der Siegelstation durchgeführte Evakuierungsvorgang lediglich eine reduzierte Kühlleistung zu erbringen braucht, um die Produkte vor dem Siegelvorgang auf ein gewünschtes Temperaturniveau zu bringen. Die aktiv gesteuerte Produktkühlung startet damit bei der Erfindung bereits vorderhalb der Siegelstation, innerhalb der erfindungsgemäßen, gesonderten Vakuumkühlstation. Somit können die Produkte auf besonders effiziente Art und Weise, präzise und hinsichtlich des Siegelvorgangs zeitlich abgestimmt auf ein vorbestimmtes Temperaturniveau gebracht werden.The deep-drawing packaging machine according to the invention comprises a forming station for deep-drawing wells in a film, a filling line for filling the wells with products and a Sealing station for sealing the hollows. According to the invention, the thermoforming packaging machine has at least one vacuum cooling station upstream of the sealing station in the transport direction, which is designed for vacuum cooling of the products inserted into the troughs along the insertion path. Hot inserted products can thus already be pre-cooled to a desired (pre) temperature level on the thermoforming packaging machine, at a point upstream of the sealing station in the transport direction, before they are transported to the sealing station for the sealing process. In particular, this ensures that the hot-filled products along the insertion path are already cooled before entering the sealing station in such a way that the evacuation process carried out within the sealing station only needs to provide a reduced cooling capacity in order to bring the products to a desired temperature level before the sealing process . The actively controlled product cooling thus starts with the invention already in front of the sealing station, within the separate vacuum cooling station according to the invention. In this way, the products can be brought to a predetermined temperature level in a particularly efficient manner, precisely and in a timed manner with regard to the sealing process.

Vorzugsweise liegen die Vakuumkühlstation und die Siegelstation in Form von räumlich getrennt ausgebildeten Arbeitsstationen an der Tiefziehverpackungsmaschine vor und sind jeweils zum Ausbilden mindestens einer hermetisch verschließbaren Evakuierungskammer konfiguriert. Damit lässt sich das Abkühlen der heiß befüllten Produkte gezielt auf verschiedene Arbeitsstationen aufteilen, so dass durch die daran nacheinander erreichten Kühleffekte die Produkte besser auf ein gewünschtes Temperaturniveau abkühlbar sind.The vacuum cooling station and the sealing station are preferably in the form of spatially separated work stations on the thermoforming packaging machine and are each configured to form at least one hermetically sealable evacuation chamber. In this way, the cooling of the hot-filled products can be distributed specifically to different work stations, so that the products can be cooled down to a desired temperature level more effectively due to the successive cooling effects achieved.

Eine Variante sieht vor, dass die Vakuumkühlstation mehrere hermetisch verschließbare Evakuierungskammern umfasst, die in Transportrichtung hintereinander angeordnet sind. Damit werden an der Tiefziehverpackungsmaschine gleich mehrere Evakuierungskammern stromaufwärts der Siegelstation eingesetzt, mittels welcher die daran hindurchgeführten Produkte stufenweise abkühlbar sind, so dass der Abkühlprozess auf mehrere Maschinenarbeitstakte aufgeteilt werden kann. Dies führt zu einer deutlich gesteigerten Maschinenausbringung mit gleichbleibender Packungsqualität. Damit lassen sich die Produkte vor allem besonders sanft, sprich pro Kühlkammer geringfügig, abkühlen.A variant provides that the vacuum cooling station comprises several hermetically sealable evacuation chambers which are arranged one behind the other in the transport direction. In this way, several evacuation chambers are used on the thermoforming packaging machine upstream of the sealing station, by means of which the products passed through it can be gradually cooled so that the cooling process can be divided over several machine work cycles. This leads to a significantly increased machine output with consistent pack quality. This allows the products to be cooled particularly gently, i.e. slightly per cooling chamber.

Vorteilhaft ist es, wenn die Vakuumkühlstation eine gesonderte Vakuumpumpe vorsieht. Damit ist gemeint, dass die Vakuumkühlstation den Evakuierungsvorgang unabhängig von anderen Arbeitsstationen der Tiefziehverpackungsmaschine durchführen kann, sozusagen als autark funktionierende Arbeitsstation vorliegt. Insbesondere ist damit der Betrieb der Vakuumpumpe der Vakuumkühlstation unabhängig vom Betrieb einer an der Siegelstation eingesetzten Vakuumpumpe, so dass der Abkühlprozess an der Vakuumkühlstation produktspezifisch besser steuerbar ist.It is advantageous if the vacuum cooling station provides a separate vacuum pump. This means that the vacuum cooling station can carry out the evacuation process independently of other work stations of the thermoforming packaging machine, so to speak as an autarkically functioning one Workstation. In particular, the operation of the vacuum pump of the vacuum cooling station is independent of the operation of a vacuum pump used at the sealing station, so that the cooling process at the vacuum cooling station can be better controlled in a product-specific manner.

Alternativ dazu wäre es vorstellbar, dass die an der Siegelstation und der Vakuumkühlstation ablaufenden Evakuierungsvorgänge zueinander zeitgleich mittels einer gemeinsamen Vakuumpumpe durchführbar sind. Die Siegelstation und die Vakuumkühlstation haben sozusagen dieselbe Vakuumpumpe.As an alternative to this, it would be conceivable that the evacuation processes taking place at the sealing station and the vacuum cooling station can be carried out simultaneously with one another by means of a common vacuum pump. The sealing station and the vacuum cooling station have, so to speak, the same vacuum pump.

Eine bevorzugte Variante sieht vor, dass die Vakuumkühlstation mindestens eine Filtereinheit für einen Belüftungsvorgang aufweist. Die Belüftung der Vakuumkühlstation kann damit mittels gefilterter Luft geschehen, wodurch sich eine Keimbelastung des Produkts vermeiden lässt.A preferred variant provides that the vacuum cooling station has at least one filter unit for a ventilation process. The vacuum cooling station can be ventilated using filtered air, which prevents the product from being contaminated with germs.

Vorzugsweise sind die Siegelstation und die Vakuumkühlstation, insbesondere deren Kammerwände, auf ein vorbestimmtes Temperaturniveau beheizbar. Damit lässt sich gezielt ein Niederschlag von Feuchtigkeit an der Siegelstation und der Vakuumkühlstation verhindern, zumindest jedoch reduzieren.The sealing station and the vacuum cooling station, in particular their chamber walls, can preferably be heated to a predetermined temperature level. In this way, a precipitation of moisture on the sealing station and the vacuum cooling station can be prevented, or at least reduced, in a targeted manner.

Vorzugsweise weist die Tiefziehverpackungsmaschine mindestens einen Kondensator zum gezielten Abführen von Feuchtigkeit auf. Beispielsweise lässt sich mittels des Kondensators gezielt Feuchtigkeit aus der evakuierten Luft der Siegelstation und/oder der Vakuumkühlstation abscheiden, was insbesondere zu einer hygienischen Arbeitsweise der Tiefziehverpackungsmaschine führt. Vorstellbar ist es, dass die Siegelstation und/oder die Vakuumkühlstation über beheizte Leitungen Evakuierungsluft aus den jeweiligen Evakuierungskammern zu dem Kondensator leiten, an welchem die Feuchtigkeit aus der erwärmten Evakuierungsluft abgeschieden werden kann.The thermoforming packaging machine preferably has at least one capacitor for the targeted removal of moisture. For example, moisture can be separated from the evacuated air of the sealing station and / or the vacuum cooling station in a targeted manner by means of the condenser, which in particular leads to a hygienic operation of the thermoforming packaging machine. It is conceivable that the sealing station and / or the vacuum cooling station conduct evacuation air from the respective evacuation chambers via heated lines to the condenser, on which the moisture can be separated from the heated evacuation air.

Vorzugsweise ist die Vakuumkühlstation an einem Maschinengestell der Tiefziehverpackungsmaschine stromaufwärts der Siegelstation, wahlweise an verschiedenen Positionen, befestigbar. Damit ist die Vakuumkühlstation flexibel zum Vorkühlen unterschiedlich heiß befüllter Produkte besser einsetzbar. Eine Variante sieht am Maschinengestell eine Linearführung vor, an welcher die Vakuumkühlstation in Transportrichtung verschiebbar gelagert ist.The vacuum cooling station can preferably be attached to a machine frame of the thermoforming packaging machine upstream of the sealing station, optionally at different positions. This means that the vacuum cooling station can be used flexibly for pre-cooling products filled with different temperatures. A variant provides a linear guide on the machine frame, on which the vacuum cooling station is mounted so as to be displaceable in the transport direction.

Eine besonders vorteilhafte Variante sieht vor, dass die Vakuumkühlstation in Form einer rollbaren Wageneinheit konfiguriert ist, die an der Tiefziehverpackungsmaschine, insbesondere an deren Maschinengestell, temporär ortsfest positionierbar ist. Dies ermöglicht einen mobilen Einsatz der Vakuumkühlstation an der Tiefziehverpackungsmaschine. Die Vakuumkühlstation in Form einer rollbaren Wageneinheit eignet sich besonders gut für Service- sowie Reinigungszwecke.A particularly advantageous variant provides that the vacuum cooling station is configured in the form of a rollable trolley unit which can be temporarily fixedly positioned on the thermoforming packaging machine, in particular on its machine frame. This enables mobile use of the vacuum cooling station on the thermoforming packaging machine. The vacuum cooling station in the form of a rollable trolley unit is particularly suitable for service and cleaning purposes.

Zum Vorbehandeln der befüllten Produkte kann die Vakuumkühlstation eine Schutzgaseinrichtung aufweisen, die zum anschließenden Begasen der darin vakuumgekühlten Produkte ausgebildet ist. Damit lassen sich die befüllten Produkte für den Weitertransport mit einer Art Gashülle versehen.For pretreating the filled products, the vacuum cooling station can have a protective gas device which is designed for the subsequent gassing of the products vacuum-cooled therein. This means that the filled products can be provided with a kind of gas envelope for onward transport.

Vorzugsweise ist ein Öffnen und Schließen der Vakuumkühlstation mit einem Öffnen und Schließen der in Transportrichtung stromabwärts positionierten Siegelstation synchonisierbar. Vorstellbar wäre es, dass das Öffnen und Schließen der Vakuumkühlstation vom Öffnen und Schließen der Siegelstation getriggert wird.Opening and closing of the vacuum cooling station can preferably be synchronized with opening and closing of the sealing station positioned downstream in the transport direction. It would be conceivable that the opening and closing of the vacuum cooling station is triggered by the opening and closing of the sealing station.

Vorzugsweise weist die Tiefziehverpackungsmaschine eine Steuerung zum Steuern und Überwachen der an der Vakuumkühlstation ablaufenden Prozesse auf, unabhängig davon in welcher Form die Vakuumkühlstation und/oder an welcher Stelle die Vakuumkühlstation stromaufwärts der Siegelstation an der Tiefziehverpackungsmaschine vorliegt. Dabei kann es sich insbesondere um dieselbe Steuerung handeln, die auch zum Steuern anderer Arbeitsstationen der Tiefziehverpackungsmaschine, beispielsweise der Siegelstation und/oder der eingangs am Maschinengestell positionierten Formstation zur Herstellung der Mulden, vorgesehen ist.The thermoforming packaging machine preferably has a controller for controlling and monitoring the processes running at the vacuum cooling station, regardless of the form in which the vacuum cooling station and / or at what point the vacuum cooling station is upstream of the sealing station on the thermoforming packaging machine. This can in particular be the same control that is also provided for controlling other work stations of the thermoforming packaging machine, for example the sealing station and / or the forming station initially positioned on the machine frame for producing the wells.

Eine Variante sieht vor, dass hinsichtlich einer entlang der Einlegestrecke erfassten Produkttemperatur ein an der Vakuumkühlstation variierbarer Evakuierungsdruck aktivierbar und/oder ein darin ablaufender Evakuierungsdruckverlauf, beispielsweise in Form einer gesteuerten Druckkurve, steuerbar ist. Damit lässt sich der Kühlvorgang innerhalb der Vakuumkühlstation angesichts gemessener Produkttemperaturen produktspezifisch durchführen, sodass innerhalb der Siegelstation Produkte mit einheitlicher Produkttemperatur versiegelt werden können. In anderen Worten lassen sich somit die Produkte mit einer gewünschten Produkttemperatur der Siegelstation zuführen, damit darin Verpackungen mit gleichbleibender Produktqualität versiegelt werden können.One variant provides that, with regard to a product temperature detected along the insertion section, an evacuation pressure that can be varied at the vacuum cooling station can be activated and / or an evacuation pressure curve running therein can be controlled, for example in the form of a controlled pressure curve. In this way, the cooling process within the vacuum cooling station can be carried out product-specifically in view of the measured product temperatures, so that products with a uniform product temperature can be sealed within the sealing station. In other words, the products can thus be fed to the sealing station at a desired product temperature, so that packaging with constant product quality can be sealed therein.

Vorstellbar ist es, dass die Vakuumkühlstation eine Temperaturmesseinheit, beispielsweise in Form eines Temperatursensors oder einer Wärmebildkamera, aufweist, mittels welcher die Produkttemperatur eines unmittelbar vor der Vakuumkühlstation bereitstehenden Produkts erfassbar ist, worauf basierend der Evakuierungsvorgang steuerbar ist. Die Temperaturmesseinheit kann alternativ dazu als separate Einheit stromaufwärts der Vakuumkühlstation vorliegen.It is conceivable that the vacuum cooling station has a temperature measuring unit, for example in the form of a temperature sensor or a thermal imaging camera, by means of which the product temperature of a product available immediately in front of the vacuum cooling station can be recorded, based on which the evacuation process can be controlled. Alternatively, the temperature measuring unit can be present as a separate unit upstream of the vacuum cooling station.

Die Erfindung bezieht sich auch auf ein Verfahren zum Kühlen von Produkten, die entlang einer Einfüllstrecke einer Tiefziehverpackungsmaschine in Mulden eingelegt werden. Erfindungsgemäß werden die in Mulden eingelegten Produkte außerhalb einer Siegelstation, innerhalb einer in Transportrichtung der Siegelstation vorgelagerten Vakuumkühlstation der Tiefziehverpackungsmaschine mittels eines daran gesteuerten Evakuierungsvorgangs abgekühlt. Damit erreichen die in Mulden eingelegten Produkte bereits außerhalb der Siegelstation ein reduziertes Temperaturniveau, von welchem ausgehend sich durch die innerhalb der Siegelstation durchgeführten anschließenden Prozesse besser Verpackungen mit gleichbleibender Qualität herstellen lassen. Das aktiv innerhalb der Vakuumkühlstation gesteuerte Kühlen der Produkte stromaufwärts der Siegelstation führt bereits zu einem zumindest anteiligen Kühleffekt, welcher die anschließend innerhalb der Siegelstation ablaufenden Prozesse begünstigt. Insbesondere können die Produkte bis zur Durchführung des Siegelvorgangs präzise auf ein gewünschtes Temperaturniveau gebracht werden.The invention also relates to a method for cooling products which are placed in troughs along a filling path of a thermoforming packaging machine. According to the invention, the products placed in troughs are outside a sealing station, inside an in The vacuum cooling station of the thermoforming packaging machine upstream of the sealing station is cooled by means of a controlled evacuation process. In this way, the products placed in the troughs reach a reduced temperature level outside the sealing station, from which the subsequent processes carried out within the sealing station allow better packaging of consistent quality to be produced. The cooling of the products upstream of the sealing station, actively controlled within the vacuum cooling station, already leads to an at least partial cooling effect, which favors the processes subsequently taking place within the sealing station. In particular, the products can be brought precisely to a desired temperature level until the sealing process is carried out.

Im Folgenden werden vorteilhafte Ausführungsbeispiele der Erfindung anhand von Zeichnungen näher erläutert. Im Einzelnen zeigen:

Figur 1
eine Tiefziehverpackungsmaschine mit einer Vakuumkühlstation,
Figur 2
eine Tiefziehverpackungsmaschine mit einer Vakuumkühlstation in Form einer Wageneinheit, und
Figur 3
eine Tiefziehverpackungsmaschine mit einer Mehrkammer-Vakuumkühlstation.
In the following, advantageous exemplary embodiments of the invention are explained in more detail with reference to drawings. Show in detail:
Figure 1
a thermoforming packaging machine with a vacuum cooling station,
Figure 2
a thermoforming packaging machine with a vacuum cooling station in the form of a carriage unit, and
Figure 3
a thermoforming packaging machine with a multi-chamber vacuum cooling station.

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

Fig. 1 zeigt eine erfindungsgemäße, intermittierend arbeitende Tiefziehverpackungsmaschine 1. Die Tiefziehverpackungsmaschine 1 weist eine Formstation 2, eine Vakuumkühlstation 3, eine Siegelstation 4, eine Querschneideeinrichtung 5 und eine Längsschneideeinrichtung 6 auf, die in dieser Reihenfolge in einer Transportrichtung R an einem Maschinengestell 7 angeordnet sind. Eingangsseitig befindet sich an dem Maschinengestell 7 eine Zuführrolle 8, von der eine Unterfolie 9 abgezogen wird. Ferner weist die Tiefziehverpackungsmaschine 1 eine Transportkette 10 auf, die die Unterfolie 9 ergreift und diese pro Hauptarbeitstakt in der Transportrichtung R weitertransportiert. Fig. 1 shows an intermittently operating thermoforming packaging machine 1 according to the invention. On the input side, on the machine frame 7, there is a feed roller 8, from which a lower film 9 is pulled off. Furthermore, the thermoforming packaging machine 1 has a transport chain 10 which grips the lower film 9 and transports it further in the transport direction R per main work cycle.

In der dargestellten Ausführungsform gemäß Fig. 1 ist die Formstation 2 als eine Tiefziehstation ausgebildet, in der durch Tiefziehen, beispielsweise mittels Druckluft und/oder Vakuum, Mulden 11 in der Unterfolie 9 geformt werden. Dabei kann die Formstation 2 derart ausgebildet sein, dass in der Richtung senkrecht zur Transportrichtung R mehrere Mulden 11 nebeneinander gebildet werden. In Transportrichtung R der Formstation 2 nachgeordnet ist eine Einlegestrecke 12 vorgesehen, in welcher die in der Unterfolie 9 geformten Mulden 11 mit Produkten 13 befüllt werden.In the illustrated embodiment according to Fig. 1 the forming station 2 is designed as a deep-drawing station in which depressions 11 are formed in the lower film 9 by deep-drawing, for example by means of compressed air and / or vacuum. The forming station 2 can be designed in such a way that a plurality of troughs 11 are formed next to one another in the direction perpendicular to the transport direction R. An insertion section 12 is provided downstream of the forming station 2 in the transport direction R, in which the troughs 11 formed in the lower film 9 are filled with products 13.

Die Vakuumkühlstation 3 verfügt über eine hermetisch verschließbare Kammer 3a, in der die Atmosphäre in den Mulden 11 evakuiert werden kann. Zum Evakuieren der Kammer 3a weist die Vakuumkühlstation 3 eine Vakuumpumpe 16 auf.The vacuum cooling station 3 has a hermetically sealable chamber 3a in which the atmosphere in the troughs 11 can be evacuated. To evacuate the chamber 3 a, the vacuum cooling station 3 has a vacuum pump 16.

Fig. 1 zeigt weiter, dass die Vakuumkühlstation 3 eine Schutzgaseinrichtung 17 umfasst, die zum Begasen der vakuumgekühlten Produkte 13 ausgebildet ist. Somit können die in die Vakuumkühlstation 3 hineintransportierten Produkte 13 sowohl vakuumgekühlt, als auch mit einem Austauschgas oder einem Gasgemisch gasbespült werden. Fig. 1 further shows that the vacuum cooling station 3 comprises a protective gas device 17 which is designed for gassing the vacuum-cooled products 13. The products 13 transported into the vacuum cooling station 3 can thus be both vacuum-cooled and gas-flushed with an exchange gas or a gas mixture.

Die Siegelstation 4 verfügt über eine hermetisch verschließbare Kammer 4a, in der die Atmosphäre in den Mulden 11 unmittelbar vor dem Versiegeln mit einer von einer Oberfolienaufnahme 14 abgegebenen Oberfolie 15 z. B. evakuiert und/oder durch Gasspülen mit einem Austauschgas oder mit einem Gasgemisch ersetzt werden kann.The sealing station 4 has a hermetically sealable chamber 4a in which the atmosphere in the troughs 11 immediately before sealing with an upper film 15, e.g. B. evacuated and / or replaced by gas purging with a replacement gas or with a gas mixture.

Die Querschneideeinrichtung 5 kann als Stanze ausgebildet sein, die die Unterfolie 9 und die Oberfolie 15 in einer Richtung quer zur Transportrichtung R zwischen benachbarten Mulden 11 durchtrennt. Dabei arbeitet die Querschneideeinrichtung 5 derart, dass die Unterfolie 9 nicht auf der gesamten Breite aufgetrennt wird, so dass zumindest in einem Randbereich die Folie nicht durchtrennt wird. Dies ermöglicht einen kontrollierten Weitertransport durch die Transportkette 10.The cross-cutting device 5 can be designed as a punch which cuts through the lower film 9 and the upper film 15 in a direction transverse to the transport direction R between adjacent troughs 11. The cross-cutting device 5 works in such a way that the lower film 9 is not severed over the entire width, so that the film is not severed at least in one edge area. This enables a controlled further transport through the transport chain 10.

Die Längsschneideeinrichtung 6 kann als eine Messeranordnung ausgebildet sein, mit der die Unterfolie 9 und die Oberfolie 15 zwischen benachbarten Mulden 11 und am seitlichen Rand der Unterfolie 9 in Transportrichtung R durchtrennt werden, so dass hinter der Längsschneideeinrichtung 6 vereinzelte Verpackungen V vorliegen.The longitudinal cutting device 6 can be designed as a knife arrangement with which the lower film 9 and the upper film 15 are severed between adjacent troughs 11 and on the side edge of the lower film 9 in the transport direction R, so that individual packagings V are present behind the longitudinal cutting device 6.

Die Tiefziehverpackungsmaschine 1 verfügt ferner über eine Steuerung 18. Sie hat die Aufgabe, die in der Tiefziehverpackungsmaschine 1 ablaufenden Prozesse an den Arbeitsstationen zu steuern und zu überwachen. Eine Anzeigevorrichtung 19 mit Bedienelementen 20 dient zum Visualisieren bzw. Beeinflussen der Prozessabläufe in der Tiefziehverpackungsmaschine 1 für bzw. durch einen Bediener.The thermoforming packaging machine 1 also has a controller 18. Its task is to control and monitor the processes running in the thermoforming packaging machine 1 at the work stations. A display device 19 with operating elements 20 is used to visualize or influence the process sequences in the thermoforming packaging machine 1 for or by an operator.

Gemäß Fig. 1 sind die Vakuumkühlstation 3 und die Siegelstation 4 in Form von räumlich getrennt voneinander ausgebildeten Arbeitsstationen an der Tiefziehverpackungsmaschine 1 ausgebildet. Gegenüber der Vakuumkühlstation 3 weist die Siegelstation 4 eine eigene Vakuumpumpe 21 zum Durchführen eines Evakuierungsvorgangs innerhalb der Evakuierungskammer 4a auf. Die Vakuumpumpe 16 der Vakuumkühlstation 3 und die Vakuumpumpe 21 der Siegelstation 4 liegen somit als gesonderte Vakuumpumpen 16, 21 vor, die mittels der Steuerung 18 getrennt voneinander ansteuerbar sind.According to Fig. 1 the vacuum cooling station 3 and the sealing station 4 are designed in the form of spatially separated work stations on the thermoforming packaging machine 1. Opposite the vacuum cooling station 3, the sealing station 4 has its own vacuum pump 21 for carrying out an evacuation process within the evacuation chamber 4a. The vacuum pump 16 of the vacuum cooling station 3 and the vacuum pump 21 of the sealing station 4 are therefore located as separate vacuum pumps 16, 21, which can be controlled separately from one another by means of the controller 18.

Weiter zeigt Fig. 1 in gestrichelter Darstellung, dass die stromaufwärts der Siegelstation 4 positionierte Vakuumkühlstation 3 zwei oder sogar noch mehr Evakuierungskammern 3a zum Durchführen aufeinanderfolgender Vakuumkühlprozesse aufweisen kann. Damit können die Produkte 13 besonders sanft abgekühlt werden.Next shows Fig. 1 in dashed lines that the vacuum cooling station 3 positioned upstream of the sealing station 4 can have two or even more evacuation chambers 3a for carrying out successive vacuum cooling processes. The products 13 can thus be cooled particularly gently.

Weiterhin zeigt Fig. 1 schematisch, dass die Vakuumkühlstation 3 eine Filtereinheit 22 aufweist, durch die nach dem Vakuumkühlen mittels eines Belüftungsvorgangs gefilterte, keimfreie Luft in die Kammer 3a einströmt.Furthermore shows Fig. 1 schematically that the vacuum cooling station 3 has a filter unit 22 through which, after vacuum cooling by means of a ventilation process, filtered, sterile air flows into the chamber 3a.

Fig. 1 zeigt auch eine Temperaturmesseinheit 25 mittels welcher eine Produkttemperatur T der darunter vorbeitransportierten Produkte 13 messbar ist. Anhand der Steuerung 18 der Tiefziehverpackungsmaschine 1 lassen sich hinsichtlich der erfassten Produkttemperatur T ein Evakuierungsdruck und/oder ein Evakuierungsdruckverlauf für die jeweiligen Evakuierungsvorgänge innerhalb der nachgelagerten Vakuumkühlstation 3 vorzugsweise automatisiert einstellen. Fig. 1 also shows a temperature measuring unit 25 by means of which a product temperature T of the products 13 transported past underneath can be measured. With the aid of the controller 18 of the thermoforming packaging machine 1, an evacuation pressure and / or an evacuation pressure curve for the respective evacuation processes within the downstream vacuum cooling station 3 can preferably be set automatically with regard to the detected product temperature T.

Fig. 2 zeigt die Tiefziehverpackungsmaschine 1 aus Fig. 1, wobei die Vakuumkühlstation 3 in Form einer rollbaren Wageneinheit 23 konfiguriert ist, die an der Tiefziehverpackungsmaschine 1 stromaufwärts der Siegelstation 4 steht, um daran hindurchtransportierte Produkte 13 mittels eines Evakuierungsvorgangs zu kühlen, bevor sie die stromabwärts nachgelagerte Siegelstation 4 erreichen. Die Wageneinheit 23 bildet ein fahrbares Modul, das sich besonders gut für einen flexiblen Einsatz an verschiedenen Tiefziehverpackungsmaschinentypen eignet, da seine Positionierung zwischen der Einlegestrecke 12 und der Siegelstation 4 frei wählbar ist. Fig. 2 shows the thermoforming packaging machine 1 from Fig. 1 The vacuum cooling station 3 is configured in the form of a rollable carriage unit 23, which is located on the thermoforming packaging machine 1 upstream of the sealing station 4 in order to cool products 13 transported through it by means of an evacuation process before they reach the downstream sealing station 4. The carriage unit 23 forms a mobile module which is particularly suitable for flexible use on various types of thermoforming packaging machines, since its positioning between the insertion section 12 and the sealing station 4 can be freely selected.

Fig. 3 zeigt die Tiefziehverpackungsmaschine 1 mit einer als Mehrkammer-Vakuumkühlstation ausgebildeten Vakuumkühlstation 3, die in Transportrichtung R unmittelbar stromaufwärts der Siegelstation 4 positioniert ist. Die jeweiligen innerhalb der Kammern 3a der Vakuumkühlstation 3 nacheinander durchgeführten Evakuierungsvorgänge führen zu einer stufenweisen, gesteuerten Vakuumkühlung der Produkte 13, bevor diese zum Verschließen der Mulden 11 mit der Oberfolie 15 in die Siegelstation 4 transportiert werden. Fig. 3 shows the thermoforming packaging machine 1 with a vacuum cooling station 3 designed as a multi-chamber vacuum cooling station, which is positioned in the transport direction R immediately upstream of the sealing station 4. The respective evacuation processes carried out one after the other within the chambers 3 a of the vacuum cooling station 3 lead to a gradual, controlled vacuum cooling of the products 13 before they are transported to the sealing station 4 to close the troughs 11 with the upper film 15.

Gemäß Fig. 3 sind die Vakuumkühlstation 3 und die Siegelstation 4 als unmittelbar benachbarte Arbeitsstationen ausgebildet, wobei für beide sogar ein integraler Aufbau vorstellbar ist. Fig. 3 zeigt auch, dass die Tiefziehverpackungsmaschine 1 einen Kondensator 24 aufweist, der zum gezielten Abführen von Feuchtigkeit konfiguriert ist. Der Kondensator 24 kann auch in Zusammenhang mit der Vakuumkühlstation 3 aus Figur 1 und Figur 2 eingesetzt werden.According to Fig. 3 the vacuum cooling station 3 and the sealing station 4 are designed as directly adjacent work stations, whereby an integral structure is even conceivable for both. Fig. 3 also shows that the thermoforming packaging machine 1 has a capacitor 24 which is used for targeted removal of moisture is configured. The condenser 24 can also be used in connection with the vacuum cooling station 3 Figure 1 and Figure 2 can be used.

Von der Siegelstation 4 führt eine Evakuierungsleitung 4b zum Kondensator 24. Ebenfalls führen von den Kammern 3a der Vakuumkühlstation 3 jeweilige Evakuierungsleitungen 3b zum Kondensator 24. Die Evakuierungsleitungen 3b, 4b sind vorzugsweise beheizbar ausgebildet, so dass erst am Kondensator 24 ein gezieltes Abscheiden von Feuchtigkeit aus der aus den Kammern 3a, 4a evakuierten Luft geschieht.An evacuation line 4b leads from the sealing station 4 to the condenser 24. Also, respective evacuation lines 3b lead from the chambers 3a of the vacuum cooling station 3 to the condenser 24. The evacuation lines 3b, 4b are preferably designed to be heatable, so that moisture is only separated in a targeted manner at the condenser 24 the air evacuated from the chambers 3a, 4a happens.

Die vorliegende Erfindung ermöglicht es, entlang der Einlegestrecke 12 der Tiefziehverpackungsmaschine 1 heiß eingelegte Produkte 13 mittels Vakuumkühlens, ggf. stufenartig durch ein Mehrkammerkühlsystem, gezielt auf ein gewünschtes Temperaturniveau abzukühlen, bevor diese die Siegelstation 4 erreichen, damit der innerhalb der Siegelstation 4 durchgeführte Siegelvorgang wirtschaftlicher und mit gleichbleibender Verpackungsqualität durchgeführt werden kann.The present invention makes it possible, along the infeed section 12 of the deep-drawing packaging machine 1, to cool down hot-inserted products 13 by means of vacuum cooling, possibly in stages through a multi-chamber cooling system, to a desired temperature level before they reach the sealing station 4, so that the sealing process carried out within the sealing station 4 is more economical and can be carried out with consistent packaging quality.

Claims (15)

Tiefziehverpackungsmaschine (1) mit einer Formstation (2) zum Tiefziehen von Mulden (11) in eine Folie (9), einer Einfüllstrecke (12) zum Befüllen von Produkten (13) in die Mulden (11) und mit einer Siegelstation (4) zum Versiegeln der Mulden (11),
dadurch gekennzeichnet, dass die Tiefziehverpackungsmaschine (1) in Transportrichtung (R) stromaufwärts der Siegelstation (4) mindestens eine Vakuumkühlstation (3) aufweist, die zum Vakuumkühlen der entlang der Einfüllstrecke (12) in die Mulden (11) eingelegten Produkte (13) ausgebildet ist.Thermoforming packaging machine (1) with a forming station (2) for thermoforming wells (11) in a film (9), a filling line (12) for filling products (13) into the wells (11) and with a sealing station (4) for Sealing the troughs (11),
characterized in that the thermoforming packaging machine (1) has at least one vacuum cooling station (3) upstream of the sealing station (4) in the transport direction (R), which is designed for vacuum cooling of the products (13) placed in the troughs (11) along the filling path (12) is. Tiefziehverpackungsmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Vakuumkühlstation (3) und die Siegelstation (4) in Form von räumlich getrennt ausgebildeten Arbeitsstationen an der Tiefziehverpackungsmaschine (1) vorliegen und jeweils zum Ausbilden mindestens einer hermetisch verschließbaren Evakuierungskammer (3a, 4a) konfiguriert sind.Thermoforming packaging machine according to Claim 1, characterized in that the vacuum cooling station (3) and the sealing station (4) are in the form of spatially separated work stations on the thermoforming packaging machine (1) and are each configured to form at least one hermetically sealable evacuation chamber (3a, 4a) . Tiefziehverpackungsmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Vakuumkühlstation (3) mehrere hermetisch verschließbare Evakuierungskammern (3a) umfasst, die in Transportrichtung (R) hintereinander angeordnet sind.Thermoforming packaging machine according to claim 1 or 2, characterized in that the vacuum cooling station (3) comprises several hermetically sealable evacuation chambers (3a) which are arranged one behind the other in the transport direction (R). Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Vakuumkühlstation (3) eine gesonderte Vakuumpumpe (16) vorsieht.Thermoforming packaging machine according to one of the preceding claims, characterized in that the vacuum cooling station (3) provides a separate vacuum pump (16). Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Vakuumkühlstation (3) mindestens eine Filtereinheit (22) für einen Belüftungsvorgang aufweist.Thermoforming packaging machine according to one of the preceding claims, characterized in that the vacuum cooling station (3) has at least one filter unit (22) for a ventilation process. Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Siegelstation (4) und die Vakuumkühlstation (3) auf ein vorbestimmtes Temperaturniveau beheizbar sind.Thermoforming packaging machine according to one of the preceding claims, characterized in that the sealing station (4) and the vacuum cooling station (3) can be heated to a predetermined temperature level. Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Tiefziehverpackungsmaschine (1) mindestens einen Kondensator (24) zum gezielten Abführen von Feuchtigkeit aufweist.Thermoforming packaging machine according to one of the preceding claims, characterized in that the thermoforming packaging machine (1) has at least one capacitor (24) for the targeted removal of moisture. Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Vakuumkühlstation (3) an einem Maschinengestell (7) der Tiefziehverpackungsmaschine (1) stromaufwärts der Siegelstation (4) an verschiedenen Positionen befestigbar ist.Thermoforming packaging machine according to one of the preceding claims, characterized in that the vacuum cooling station (3) can be attached to a machine frame (7) of the thermoforming packaging machine (1) upstream of the sealing station (4) at various positions. Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Vakuumkühlstation (3) in Form einer rollbaren Wageneinheit (23) konfiguriert ist, die an der Tiefziehverpackungsmaschine (1) ortsfest positionierbar ist.Thermoforming packaging machine according to one of the preceding claims, characterized in that the vacuum cooling station (3) is configured in the form of a rollable carriage unit (23) which can be positioned in a stationary manner on the thermoforming packaging machine (1). Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Vakuumkühlstation (3) eine Schutzgaseinrichtung (17) aufweist, die zum Begasen der vakuumgekühlten Produkte (13) ausgebildet ist.Thermoforming packaging machine according to one of the preceding claims, characterized in that the vacuum cooling station (3) has a protective gas device (17) which is designed for gassing the vacuum-cooled products (13). Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass ein Öffnen und Schließen der Vakuumkühlstation (3) mit einem Öffnen und Schließen der in Transportrichtung (R) stromabwärts positionierten Siegelstation (4) synchronisierbar ist.Thermoforming packaging machine according to one of the preceding claims, characterized in that opening and closing of the vacuum cooling station (3) can be synchronized with opening and closing of the sealing station (4) positioned downstream in the transport direction (R). Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Tiefziehverpackungsmaschine (1) eine Steuerung (18) zum Steuern und Überwachen der an der Vakuumkühlstation (3) ablaufenden Prozesse aufweist.Thermoforming packaging machine according to one of the preceding claims, characterized in that the thermoforming packaging machine (1) has a controller (18) for controlling and monitoring the processes taking place at the vacuum cooling station (3). Tiefziehverpackungsmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass hinsichtlich einer entlang der Einlegestrecke (12) erfassten Produkttemperatur (T) ein Evakuierungsdruck und/oder ein Evakuierungsdruckverlauf aktivierbar ist.Thermoforming packaging machine according to one of the preceding claims, characterized in that an evacuation pressure and / or an evacuation pressure profile can be activated with regard to a product temperature (T) detected along the insertion path (12). Verfahren zum Kühlen von Produkten (13), die entlang einer Einfüllstrecke (12) einer Tiefziehverpackungsmaschine (1) in Mulden (11) eingelegt werden, dadurch gekennzeichnet, dass die in Mulden (11) eingelegten Produkte (13) außerhalb einer Siegelstation (4), innerhalb einer in Transportrichtung (R) der Siegelstation (4) vorgelagerten Vakuumkühlstation (3) der Tiefziehverpackungsmaschine (1) anhand eines daran gesteuerten Vakuumkühlvorgangs abgekühlt werden.Method for cooling products (13) which are placed in troughs (11) along a filling line (12) of a thermoforming packaging machine (1), characterized in that the products (13) placed in troughs (11) outside a sealing station (4) , within a vacuum cooling station (3) of the deep-drawing packaging machine (1) upstream of the sealing station (4) in the transport direction (R) by means of a vacuum cooling process controlled thereon. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass die in Mulden (11) eingelegten Produkte (13) jeweils gemäß einem Maschinenarbeitstakt der Tiefziehverpackungsmaschine (1) mehrere in Transportrichtung (R) hintereinander angeordnete Evakuierungskammern (3a) an der Vakuumkühlstation (3) durchlaufen, um stufenweise abgekühlt zu werden.Method according to Claim 14, characterized in that the products (13) placed in troughs (11) each correspond to a machine work cycle of the deep-drawing packaging machine (1) Pass through several evacuation chambers (3a) arranged one behind the other in the direction of transport (R) at the vacuum cooling station (3) in order to be gradually cooled.
EP20214878.9A 2020-02-03 2020-12-17 Deep drawing packaging machine with vacuum cooling station and method for vacuum cooling hot-packed products Pending EP3858749A1 (en)

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EP4335759A2 (en) 2024-03-13
US11511902B2 (en) 2022-11-29

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