EP2444324B1 - Deep draw packaging machine and method for stretching a sheet of film - Google Patents
Deep draw packaging machine and method for stretching a sheet of film Download PDFInfo
- Publication number
- EP2444324B1 EP2444324B1 EP11008381A EP11008381A EP2444324B1 EP 2444324 B1 EP2444324 B1 EP 2444324B1 EP 11008381 A EP11008381 A EP 11008381A EP 11008381 A EP11008381 A EP 11008381A EP 2444324 B1 EP2444324 B1 EP 2444324B1
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- EP
- European Patent Office
- Prior art keywords
- film
- stretching
- film web
- packaging machine
- cooling device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B65B41/00—Supplying or feeding container-forming sheets or wrapping material
- B65B41/18—Registering sheets, blanks, or webs
Definitions
- the invention relates to a thermoforming packaging machine for stretching a film web according to claim 1, as well as to a method according to claim 9.
- thermoforming packaging machine with a stretching device for stretching a lid film known to position the printed lidding film very accurately on a packaging tray.
- a photocell determined by means of a print mark on the lid film, the position of the printed image with respect to the feed and thus to the packaging tray.
- the printed image usually has an undersize and is stretched by a clamping bar clamps the flexible lid foil just before the feed end and the remaining feed movement stretches the lidding foil.
- the clamping bar can be moved counter to the feed direction to stretch the lidding film to the desired level.
- the lid sheet under tension is sealed to a trough, which is designed so that it can counteract the tensions of the lid foil, so that a visually appealing packaging can be obtained.
- stretching devices are known in which the cover film is heated by a heating plate in the region in which the stretching takes place.
- the stretching of this area of the film is made possible by the heat input.
- a heat input is necessary to stretch the film in the elastic-plastic area can.
- the high accelerations when moving the feed motion and the deflections on the pulleys up to a sealing station an uncontrolled stretching behavior, especially with a longer path of the lid film to the sealing station frequent post-corrections and large tolerances in the placement and the size of the printed image compared to the packaging tray leads.
- the reason for this is also an uncontrolled shrinkage of the film web due to the different temperature ranges in the cover film.
- the stretched length of the heated film area leads after cooling to the sealing station only to an elongation of less than one percent of the printed image. This requires a tight tolerance of the length and position of the printed image by the film supplier.
- the object of the invention is to provide a thermoforming packaging machine and a method for stretching a film web, in which the disadvantages described above can be eliminated.
- thermoforming packaging machine for stretching a film web according to claim 1 and a method for operating a thermoforming packaging machine according to claim 9.
- Advantageous developments of the invention are specified in the subclaims.
- thermoforming packaging machine comprises a stretching station for stretching a film web with a heating device, a printing mark sensor, a clamping device, wherein the stretching station has a film cooling device.
- the film cooling device causes the film web is cooled quickly after stretching and it comes with the following feeds to a sealing station to no uncontrolled changes in the film web and thus a printed image. This can now be placed very precisely on the packaging tray and sealed airtight on the packaging tray.
- the film cooling device has a cooling plate.
- the cooling plate is a simple but efficient solution to dissipate at least from the heated region of the film web the introduced during or after stretching by the heater heat again.
- the film cooling device is mounted on a different side of the film web than the heating device in order to provide a particularly compact design.
- the stretching station has a lifting mechanism for moving the film cooling device to and from the film web.
- the film cooling device can be made permanently cooled and it comes only to cool with the film web in contact.
- the movement of the film cooling device and the heater relative to the film web is carried out together by a hoist.
- the heater moves away from the film web, while at the same time the film cooling device moves towards the film web and vice versa. This allows a space-saving and cost-effective solution, since only one actuator for the movements of the film cooling device and the heater is provided.
- the film cooling device is mounted in a preferred embodiment above the sealing station, for example, is used as a mounting surface existing in this area cabinet of thermoforming packaging machine.
- the stretching station comprises at least one clamping bar, which is pivotable in order to stretch the film web.
- the clamping bar comprises a servo drive which is connected to the controller and performs a very exact stretching of the film web.
- a linear movement of the clamping bar is conceivable.
- An inventive method for stretching a film web on a thermoforming machine by means of a stretching station with a heater provides that the stretching station actively cools the film web after heating and stretching the film web. This leads to a print image that remains unchanged despite accelerations of the following feed movements up to a sealing station and can be exactly placed on a package and sealed.
- a film cooling device in particular a cooling plate, cools the film web to quickly dissipate the heat introduced into the film by the heater and thus maintain high performance of the thermoforming packaging machine.
- the film web is cooled until it is heat-set in order to obtain the film web unchanged for the further feed movements.
- the film web is preferably cooled by contact with the film cooling device in order to dissipate the heat efficiently and quickly.
- a controller receives a signal from a print mark sensor and evaluates the signal along with the instructions in the controller entered by an operator, and controls the stretching of the film web or size and position to control the print image corresponding to packaging tray.
- the print mark represents the reference for the position of the printed image and serves to determine the stretching dimension of the printed image.
- the stretching is preferably carried out by a clamping bar, which presses the film web to a deflection roller and then performs a radial movement about the deflection roller with the clamped part of the film web by means of a servo drive.
- the servo drive is suitable to achieve the accuracy of the length to be stretched and also to apply the required force for this purpose.
- FIG. 1 shows a schematic view of a thermoforming packaging machine 1.
- This has a forming station 2, a sealing station 3, a cross-cutting device 4 and longitudinal cutting device 5, which are arranged in this order in a 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 lower film 8 is withdrawn.
- a packing trough 9 is formed in the lower film 8.
- a material reservoir 10 is provided, from which a film web 11 is drawn off. Before feeding the film web 11 into the sealing station 3, this passes through a stretching station 12.
- a discharge device 13 in the form of a conveyor belt is provided on the packaging machine 1, with the finished individualized packages 14 being transported away. Furthermore, the packaging machine 1, a feed device, not shown, which engages the lower film 8 side and further transported in the main working cycle in cycles in the direction of R.
- the feed device may e.g. be realized by laterally arranged transport chains.
- a controller 17 for input of parameters by the operator and for visualization of operating conditions is attached to a control cabinet 18.
- FIG. 2 shows a stretching station 12, which is mounted in the area above the sealing station 3 on the cabinet 18. From the material storage 10, the film web 11 is transported via deflection rollers 19 by the stretching device 12 in the sealing station 3. This is done by the advancing movement of the lower film 8, to which a front region of the film web 11 is already sealed, whereby the film web 11 is pulled along. Clamp bars 20 and 21 are shown, as well as a print mark sensor 22, a heater 23 and a cooler 24. A hoist 25 is shown for the co-movement of the heater 23 and the film cooler 24.
- the process time is shown, in which the film web 11 is pulled along by the feed of the lower film 8 in the transport direction R.
- the print mark sensor 22 detects a printed mark present on the film web 11. The signal from the print mark sensor 22 is sent to the controller 17, and the controller 17 determines the timing at which the clamp bars 20 and 21 close.
- the clamping bars 20 and 21 clamp the film web 11 to the deflection rollers 19, as in FIG. 3 shown. This is preferably done at the end of the intermittent feed movement of the lower film 8.
- the hoist 25 moves the heater 23, shown here as a hot plate, to the film web 11.
- the stretching temperature is close to a glass transition temperature at which there is a significant change in the mechanical properties such as hardness and elasticity of the film web 11. Depending on the film composition, this temperature is between 60 ° C and 90 ° C, eg for APET, the glass transition temperature is about 74 ° C. Slides with a thickness of more than 200 microns have at temperatures below 30 ° C no stretching behavior.
- the stretching of the film web 11 takes place; as in FIG. 4 shown by a radial movement of the clamping bar 21 about the guide roller 19 against the feed direction, and the clamped between the two clamping bars 20 and 21 area is stretched or elongated.
- the movement of the clamping bar 21 is effected by a servo drive, not shown, which is controlled by the controller 17 and has the necessary force and positioning accuracy.
- FIG. 5 shows the phase after stretching, in which the hoist 25, the heater 23 moves away from the film web 11 and the film cooling device 24 moves up to the film web 11 so that they come into contact to cool the film web 11 in this area to a temperature until the film web 11 is heat-set in the stretched state.
- the area of the film cooling device 24 with respect to the heater 23 in the transport direction is greater, since the film web 11 is heated by the heater 23 also beyond this. This ensures that the stretched printed image of the film web 11 retains its dimensions until it is transported into the sealing station 3.
- the heat-set length after stretching corresponds to approximately 25% to 30% of the elongation of the clamped film area during the stretching process.
- 21 film webs 11 can be processed with greater tolerances in length and position of the printed image on the part of the film suppliers even with the same stretching path of the clamping bar. This leads to a cost savings in the procurement of the operator of the thermoforming packaging machine.
- the clamping bars 20 and 21 After reaching the heat setting of the film web 11 (s. FIG. 6 ), the clamping bars 20 and 21 are opened, the clamping bar 21 is pivoted back to its original position and the hoist 25 moves the film cooling device 24 up and away from the film web 11 and the heater 23 in the direction of the positions for heating of the next film section. From the time of release of the film web 11 by the clamping bar 20, 21, the next feed and transport of the film web 11 in the direction of sealing station 3 can take place.
- the film web 11 can be sealed without tension. This in turn allows the use of flexible sub-films 8.
- holes which are introduced in a perforation station optionally arranged between the stretching station 12 and the sealing station 3 remain in their exact position, since there is no stretching of the film before or in the sealing station 3 comes.
- the stretching station 12 With an optional top film forming station and / or an upper film clip chain guide, the stretching station 12 also provides the above advantages.
- the heating device 23 and the film cooling device 24 have their own hoists in order to be able to be moved independently of the film web 11 and back.
- the film can be attracted by vacuum to the heating device 23 and / or cooling device 24 in order to obtain a uniform contact over the relevant surface.
- a flat contact of the film web 11 to the heater 23 and the film cooling device 24 may also be performed by a convex shape on the surface of the heating plate or cooling plate.
- the servo drive can tighten the clamping bar 21 to the liberated film web length.
- the film cooling device 24 can be permanently cooled by means of water cooling.
- the clamping bar 20 may be pivotable as the clamping bar 21 and pivotally or linearly movable by a servo drive.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Basic Packing Technique (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
Description
Die Erfindung bezieht sich auf eine Tiefziehverpackungsmaschine zum Recken einer Folienbahn gemäß Anspruch 1, sowie auf ein Verfahren nach Anspruch 9.The invention relates to a thermoforming packaging machine for stretching a film web according to
Aus der
Weiterhin sind Reckeinrichtungen bekannt, bei denen die Deckelfolie durch eine Heizplatte in dem Bereich erwärmt wird, in dem die Reckung stattfindet. Die Reckung dieses Bereiches der Folie wird durch den Wärmeeintrag ermöglicht. Vor allem bei stärkeren Folien, insbesondere Hartfolien mit einer Dicke von mehr als 200 µm, ist ein Wärmeeintrag notwendig, um die Folie im elastisch-plastischen Bereich recken zu können. Bei den folgenden Vorschubbewegungen der Deckelfolie ergibt sich durch die ungleiche Wärmeverteilung in der Deckelfolie, die hohen Beschleunigungen beim Anfahren der Vorschubbewegung und die Umlenkungen an den Umlenkrollen bis zu einer Siegelstation ein unkontrolliertes Dehnverhalten, das vor allem bei einer längeren Wegstrecke der Deckelfolie bis zur Siegelstation zu häufigen Nachkorrekturen und großen Toleranzen in der Platzierung und der Größe des Druckbildes gegenüber der Verpackungsmulde führt. Grund hierfür ist auch ein unkontrolliertes Schrumpfen der Folienbahn durch die unterschiedlichen Temperaturbereiche in der Deckelfolie.Furthermore, stretching devices are known in which the cover film is heated by a heating plate in the region in which the stretching takes place. The stretching of this area of the film is made possible by the heat input. Especially with thicker films, especially rigid films with a thickness of more than 200 microns, a heat input is necessary to stretch the film in the elastic-plastic area can. In the subsequent advancing movements of the lid film resulting from the unequal distribution of heat in the lid film, the high accelerations when moving the feed motion and the deflections on the pulleys up to a sealing station an uncontrolled stretching behavior, especially with a longer path of the lid film to the sealing station frequent post-corrections and large tolerances in the placement and the size of the printed image compared to the packaging tray leads. The reason for this is also an uncontrolled shrinkage of the film web due to the different temperature ranges in the cover film.
Die gereckte Länge des erwärmten Folienbereichs führt nach dem Abkühlen bis zur Siegelstation nur zu einer Längung von weniger als einem Prozent des Druckbildes. Dies bedarf einer engen Toleranz der Länge und Lage des Druckbildes durch den Folienlieferanten.The stretched length of the heated film area leads after cooling to the sealing station only to an elongation of less than one percent of the printed image. This requires a tight tolerance of the length and position of the printed image by the film supplier.
Aufgabe der Erfindung ist es, eine Tiefziehverpackungsmaschine und ein Verfahren zum Recken einer Folienbahn zur Verfügung zu stellen, bei denen die vorstehend beschriebenen Nachteile beseitigt werden können.The object of the invention is to provide a thermoforming packaging machine and a method for stretching a film web, in which the disadvantages described above can be eliminated.
Diese Aufgabe wird gelöst durch eine Tiefziehverpackungsmaschine zum Recken einer Folienbahn gemäß Anspruch 1 und ein Verfahren zum Betrieb einer Tiefziehverpackungsmaschine nach Anspruch 9. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by a thermoforming packaging machine for stretching a film web according to
Eine erfindungsgemäße Tiefziehverpackungsmaschine umfasst eine Reckstation zum Recken einer Folienbahn mit einer Heizeinrichtung, einem Druckmarkensensor, einer Klemmeinrichtung, wobei die Reckstation eine Folienkühlvorrichtung aufweist. Die Folienkühlvorrichtung bewirkt, dass die Folienbahn nach dem Recken schnell abgekühlt wird und es bei den folgenden Vorschüben bis zu einer Siegelstation zu keinen unkontrollierten Veränderungen der Folienbahn und somit eines Druckbildes kommt. Dieses kann nun sehr exakt auf der Verpackungsmulde platziert und auf die Verpackungsmulde luftdicht aufgesiegelt werden.A thermoforming packaging machine according to the invention comprises a stretching station for stretching a film web with a heating device, a printing mark sensor, a clamping device, wherein the stretching station has a film cooling device. The film cooling device causes the film web is cooled quickly after stretching and it comes with the following feeds to a sealing station to no uncontrolled changes in the film web and thus a printed image. This can now be placed very precisely on the packaging tray and sealed airtight on the packaging tray.
In einer vorteilhaften Ausführung weist die Folienkühlvorrichtung eine Kühlplatte auf. Die Kühlplatte stellt eine einfache aber effiziente Lösung dar, um wenigstens aus dem erwärmten Bereich der Folienbahn die während oder nach dem Recken durch die Heizeinrichtung eingebrachte Wärme wieder abzuführen.In an advantageous embodiment, the film cooling device has a cooling plate. The cooling plate is a simple but efficient solution to dissipate at least from the heated region of the film web the introduced during or after stretching by the heater heat again.
Vorzugsweise ist die Folienkühlvorrichtung auf einer anderen Seite der Folienbahn als die Heizeinrichtung angebracht, um eine besonders kompakte Bauform zur Verfügung zu stellen.Preferably, the film cooling device is mounted on a different side of the film web than the heating device in order to provide a particularly compact design.
In einer bevorzugten Ausführung weist die Reckstation ein Hubwerk zum Hin- und Wegbewegen der Folienkühlvorrichtung zur Folienbahn auf. Somit kann die Folienkühlvorrichtung dauergekühlt ausgeführt sein und sie kommt nur zum Kühlen mit der Folienbahn in Kontakt.In a preferred embodiment, the stretching station has a lifting mechanism for moving the film cooling device to and from the film web. Thus, the film cooling device can be made permanently cooled and it comes only to cool with the film web in contact.
Vorzugsweise wird die Bewegung der Folienkühlvorrichtung und der Heizeinrichtung gegenüber der Folienbahn gemeinsam durch ein Hubwerk ausgeführt. Dabei bewegt sich beispielsweise die Heizeinrichtung von der Folienbahn weg, während sich gleichzeitig die Folienkühlvorrichtung zur Folienbahn hinbewegt und umgekehrt. Dies ermöglicht eine platzsparende und kostengünstige Lösung, da nur ein Aktor für die Bewegungen der Folienkühlvorrichtung und der Heizeinrichtung vorgesehen ist.Preferably, the movement of the film cooling device and the heater relative to the film web is carried out together by a hoist. In this case, for example, the heater moves away from the film web, while at the same time the film cooling device moves towards the film web and vice versa. This allows a space-saving and cost-effective solution, since only one actuator for the movements of the film cooling device and the heater is provided.
Die Folienkühlvorrichtung ist in bevorzugter Ausführung oberhalb der Siegelstation angebracht, beispielsweise wird als Montagefläche ein in diesem Bereich vorhandener Schaltschrank der Tiefziehverpackungsmaschine genutzt.The film cooling device is mounted in a preferred embodiment above the sealing station, for example, is used as a mounting surface existing in this area cabinet of thermoforming packaging machine.
In einer bevorzugten Ausführung umfasst die Reckstation wenigstens einen Klemmbalken, der schwenkbar ist, um die Folienbahn zu recken. Idealerweise umfasst der Klemmbalken einen Servoantrieb, der mit der Steuerung verbunden ist und ein sehr exaktes Recken der Folienbahn ausführt. Alternativ ist auch eine lineare Bewegung des Klemmbalkens denkbar.In a preferred embodiment, the stretching station comprises at least one clamping bar, which is pivotable in order to stretch the film web. Ideally, the clamping bar comprises a servo drive which is connected to the controller and performs a very exact stretching of the film web. Alternatively, a linear movement of the clamping bar is conceivable.
Ein erfindungsgemäßes Verfahren zum Recken einer Folienbahn auf einer Tiefziehmaschine mittels einer Reckstation mit einer Heizeinrichtung sieht vor, dass die Reckstation die Folienbahn nach dem Aufheizen und Recken der Folienbahn aktiv kühlt. Dies führt zu einem Druckbild, das trotz Beschleunigungen der folgenden Vorschubbewegungen bis hin zu einer Siegelstation unverändert bleibt und exakt auf einer Verpackung platziert und gesiegelt werden kann.An inventive method for stretching a film web on a thermoforming machine by means of a stretching station with a heater provides that the stretching station actively cools the film web after heating and stretching the film web. This leads to a print image that remains unchanged despite accelerations of the following feed movements up to a sealing station and can be exactly placed on a package and sealed.
Vorzugsweise kühlt eine Folienkühlvorrichtung, insbesondere eine Kühlplatte, die Folienbahn, um die durch die Heizeinrichtung in die Folie eingebrachte Wärme schnell abzuleiten und somit eine hohe Leistung der Tiefziehverpackungsmaschine aufrecht zu erhalten.Preferably, a film cooling device, in particular a cooling plate, cools the film web to quickly dissipate the heat introduced into the film by the heater and thus maintain high performance of the thermoforming packaging machine.
Vorzugsweise wird die Folienbahn soweit gekühlt, bis diese thermofixiert ist, um die Folienbahn für die weiteren Vorschubbewegungen unverändert zu erhalten.Preferably, the film web is cooled until it is heat-set in order to obtain the film web unchanged for the further feed movements.
Dabei wird die Folienbahn in bevorzugter Weise über Kontakt mit der Folienkühlvorrichtung gekühlt, um die Wärme effizient und schnell abzuführen.In this case, the film web is preferably cooled by contact with the film cooling device in order to dissipate the heat efficiently and quickly.
In einer bevorzugten Form nimmt eine Steuerung ein Signal eines Druckmarkensensors auf und wertet das Signal zusammen mit den Vorgaben in der Steuerung, die durch einen Bediener eingegeben wurden, aus und steuert das Recken der Folienbahn bzw. die Grö-βe und Lage das Druckbild entsprechend der Verpackungsmulde. Die Druckmarke stellt die Referenz für die Lage des Druckbildes dar und sie dient zur Ermittlung des Reckmaßes des Druckbildes.In a preferred form, a controller receives a signal from a print mark sensor and evaluates the signal along with the instructions in the controller entered by an operator, and controls the stretching of the film web or size and position to control the print image corresponding to packaging tray. The print mark represents the reference for the position of the printed image and serves to determine the stretching dimension of the printed image.
Das Recken erfolgt vorzugsweise durch einen Klemmbalken, der die Folienbahn an eine Umlenkrolle presst und dann eine radiale Bewegung um die Umlenkrolle mit dem geklemmten Teil der Folienbahn mittels eines Servoantriebs ausführt. Der Servoantrieb ist geeignet, um die Genauigkeit der zu reckenden Länge zu erreichen und auch die benötigte Kraft hierfür aufzubringen.The stretching is preferably carried out by a clamping bar, which presses the film web to a deflection roller and then performs a radial movement about the deflection roller with the clamped part of the film web by means of a servo drive. The servo drive is suitable to achieve the accuracy of the length to be stretched and also to apply the required force for this purpose.
Im Folgenden wird ein vorteilhaftes Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher dargestellt.
Figur 1- eine Vorderansicht einer erfindungsgemäßen Tiefziehverpackungsmaschine,
Figur 2- schematische Ansicht einer Reckstation während eines Folienvorschubs,
- Figur 3
- schematische Ansicht einer Reckstation mit geklemmter Folienbahn beim Aufheizen,
- Figur 4
- schematische Ansicht einer Reckstation beim Recken,
- Figur 5
- schematische Ansicht einer Reckstation beim Kühlen ,
Figur 6- schematische Ansicht einer Reckstation vor einem folgenden Vorschub.
- FIG. 1
- a front view of a thermoforming packaging machine according to the invention,
- FIG. 2
- schematic view of a stretching station during a film feed,
- FIG. 3
- schematic view of a stretching station with clamped film web during heating,
- FIG. 4
- schematic view of a stretching station while stretching,
- FIG. 5
- schematic view of a stretching station when cooling,
- FIG. 6
- schematic view of a stretching station before a subsequent feed.
Gleiche und ähnliche Komponenten sind in den Figuren durchgängig mit gleichen Bezugszeichen versehen.The same and similar components are provided throughout the figures with the same reference numerals.
Ausgangsseitig ist an der Verpackungsmaschine 1 eine Abfuhreinrichtung 13 in Form eines Transportbandes vorgesehen, mit der fertige vereinzelte Verpackungen 14 abtransportiert werden. Ferner weist die Verpackungsmaschine 1 eine nicht dargestellte Vorschubeinrichtung auf, die die Unterfolie 8 seitlich ergreift und in dem Hauptarbeitstakt taktweise in der Arbeitsrichtung R weitertransportiert. Die Vorschubeinrichtung kann z.B. durch seitlich angeordnete Transportketten realisiert sein.On the output side, a
Im Bereich der Einlegestrecke 15 wird ein Produkt 16 eingelegt. Eine Steuerung 17 zur Eingabe von Parametern durch den Bediener und zur Visualisierung von Betriebszuständen ist an einem Schaltschrank 18 angebracht.In the area of the
Dabei klemmen die Klemmbalken 20 und 21 die Folienbahn 11 an die Umlenkrollen 19, wie in
Während und nach der Aufwärmphase erfolgt das Recken der Folienbahn 11; wie in
Die nach dem Recken thermofixierte Länge entspricht ca. 25 % bis 30% der Längung des eingespannten Folienbereichs während des Reckvorganges. Damit können auch bei gleichbleibendem Reckweg des Klemmbalkens 21 Folienbahnen 11 mit größeren Toleranzen in der Länge und Lage des Druckbildes seitens des Folienlieferanten verarbeitet werden. Dies führt zu einer Kostenersparnis in der Beschaffung beim Betreiber der Tiefziehverpackungsmaschine.The heat-set length after stretching corresponds to approximately 25% to 30% of the elongation of the clamped film area during the stretching process. Thus, 21
Nach Erreichen der Thermofixierung der Folienbahn 11 (s.
Wird das Druckbild auf die entsprechende Länge der Packungsmulde 9 gereckt, so kann die Folienbahn 11 spannungsfrei aufgesiegelt werden. Dies wiederum ermöglicht den Einsatz von flexiblen Unterfolien 8. Ebenso bleiben Löcher, die in einer zwischen der Reckstation 12 und der Siegelstation 3 optional angeordneten Lochstation eingebracht werden, in ihrer Lage exakt bestehen, da es zu keiner Dehnung der Folie vor oder in der Siegelstation 3 kommt. Bei einer optionalen Oberfolienformstation ist und/oder einer Oberfolienklammerkettenführung bietet die Reckstation 12 ebenso die oben genannten Vorteile.If the printed image is stretched to the corresponding length of the
Es ist ebenso denkbar, dass die Heizeinrichtung 23 und die Folienkühlvorrichtung 24 eigene Hubwerke besitzen, um unabhängig voneinander an die Foliebahn 11 und zurück bewegt werden zu können. Um eine optimale Wärmeübertragung bzw. Kühlung zu erhalten, kann die Folie mittels Vakuum an die Heizeinrichtung 23 und/oder Kühleinrichtung 24 angezogen werden, um einen gleichmäßigen Kontakt über die betreffende Fläche zu erhalten.It is also conceivable that the
Eine flächiger Kontakt der Folienbahn 11 an die Heizeinrichtung 23 und die Folienkühlvorrichtung 24 kann auch durch eine konvexe Form an der Oberfläche der Heizplatte oder Kühlplatte ausgeführt sein. Beim Wegbewegen der Heizeinrichtung 23 kann der Servoantrieb den Klemmbalken 21 um die freiwerdende Folienbahnlänge nachspannen.A flat contact of the
Die Folienkühlvorrichtung 24 kann mittels einer Wasserkühlung dauergekühlt sein.The
Der Klemmbalken 20 kann wie der Klemmbalken 21 schwenkbar sein und durch einen Servoantrieb schwenkbar oder linear bewegbar ausgeführt sein.The clamping
Claims (14)
- A thermoform packaging machine (1), comprising a stretching station (12) for stretching a film web (11) with a heating unit (23), a print mark sensor (22) and a clamping unit (20, 21), characterized in that the stretching station (12) includes a film cooling device (24).
- The thermoform packaging machine according to claim 1, characterized in that the film cooling device (24) is provided with a cooling plate.
- The thermoform packaging machine according to one of the preceding claims, characterized in that the film cooling device (24) is located on the other side of the film web (11) from the heating unit (23).
- The thermoform packaging machine according to one of the preceding claims, characterized in that the stretching station (12) includes a lifting unit (25) for moving the film cooling device (24) towards and away from the film web (11).
- The thermoform packaging machine according to claim 4, characterized in that the film cooling device (24) and the heating unit (23) are adapted to be moved in common relative to the film web (11) by means of the lifting unit (25).
- The thermoform packaging machine according to one of the preceding claims, characterized in that the film cooling device (24) is arranged above a sealing station (3).
- The thermoform packaging machine according to one of the preceding claims, characterized in that the stretching station (12) comprises at least one clamping bar (21) which is pivotable so as to stretch the film web (11).
- The thermoform packaging machine according to claim 7, characterized in that the clamping bar (21) has a servo drive.
- A method of stretching a film web (11) on a thermoform machine (1) by means of a stretching station (12) including a heating unit (23), characterized in that the stretching station (12) actively cools a film web (11) after heating of the film web (11) and after stretching of the film web (11).
- The method according to claim 9, characterized in that the film web (11) is cooled by means of a film cooling device (24), in particular a cooling plate.
- The method according to claim 9 or 10, characterized in that the film web (11) is cooled until the film web (11) has been thermofixed.
- The method according to claim 10 or 11, characterized in that the film web (11) is cooled through contact with the film cooling device (24).
- The method according to one of the claims 9 to 12, characterized in that a controller (17) receives a signal of a print mark sensor (22) and evaluates said signal together with parameters which are stored in said controller (17) and which have been inputted by a user, and controls the stretching of the film web (11) on the basis of this evaluation.
- The method according to one of the preceding claims 9 to 13, characterized in that the stretching of the film web (11) is executed by a clamping bar (21) by means of a servo drive.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010048977A DE102010048977A1 (en) | 2010-10-20 | 2010-10-20 | Thermoforming packaging machine and method for stretching a film web |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2444324A1 EP2444324A1 (en) | 2012-04-25 |
EP2444324B1 true EP2444324B1 (en) | 2013-02-13 |
Family
ID=44862306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11008381A Not-in-force EP2444324B1 (en) | 2010-10-20 | 2011-10-18 | Deep draw packaging machine and method for stretching a sheet of film |
Country Status (5)
Country | Link |
---|---|
US (1) | US9180987B2 (en) |
EP (1) | EP2444324B1 (en) |
CN (1) | CN102530287B (en) |
DE (1) | DE102010048977A1 (en) |
ES (1) | ES2400608T3 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102837849A (en) * | 2012-09-13 | 2012-12-26 | 内蒙古三主粮天然燕麦产业股份有限公司 | Automatic continuously drawing vacuum package machine |
DE102012024725A1 (en) * | 2012-12-18 | 2014-06-18 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Thermoforming packaging machine and process |
US10730652B2 (en) * | 2014-10-28 | 2020-08-04 | Heat Seal Llc | Packaging machine and method for fabricating sheet metal housing components |
EP3192641B1 (en) | 2016-01-12 | 2021-06-09 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Moulding station for a deep draw packaging machine |
IT201700035537A1 (en) | 2017-03-31 | 2018-10-01 | Fillshape Srl | Process and apparatus for the manufacture of bags for doypack and similar food containers. |
DE102017211557A1 (en) | 2017-07-06 | 2019-01-10 | Robert Bosch Gmbh | Device for influencing a film in a thermoforming plant |
US11472579B2 (en) | 2018-12-04 | 2022-10-18 | Gpcp Ip Holdings Llc | Film securing apparatus and method |
DE102019205171A1 (en) * | 2019-04-11 | 2020-10-15 | Syntegon Technology Gmbh | Method and device for processing a cover of a packaging |
CN110239777B (en) * | 2019-06-28 | 2021-09-21 | 湖北周黑鸭食品工业园有限公司 | Preparation method of packaging container and packaging container |
CN110239795A (en) * | 2019-06-28 | 2019-09-17 | 湖北鸭酷科技有限公司 | A kind of printed sheet material localization method for packaging |
EP4028245A1 (en) * | 2019-09-09 | 2022-07-20 | GEA Food Solutions Weert B.V. | Stretching unit for clamping and stretching a tubular film, flow-wrapper and method for clamping and stretching a tubular film |
DE102019218265A1 (en) * | 2019-11-26 | 2021-05-27 | Multivac Sepp Haggenmüller Se & Co. Kg | PACKAGING MACHINE WITH SEALED PULLEY |
DE102020209819A1 (en) | 2020-08-04 | 2022-02-10 | Multivac Sepp Haggenmüller Se & Co. Kg | film clamping |
Family Cites Families (15)
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US3762125A (en) * | 1971-03-17 | 1973-10-02 | Morrell & Co John | Film registration apparatus |
US4018028A (en) * | 1971-07-23 | 1977-04-19 | Societe D'application Plastique Mecanique Et Electronique, Plastimecanique S.A. | Arrangement for aligning heat-sealable lids on mating product-filled containers |
US3805486A (en) * | 1972-05-31 | 1974-04-23 | Mahaffy & Harder Eng Co | Packaging apparatus and techniques |
FR2205039A5 (en) | 1972-10-02 | 1974-05-24 | Robache Roger | |
US4034536A (en) * | 1976-06-11 | 1977-07-12 | Mahaffy & Harder Engineering Company | Packaging apparatus and techniques |
US4033089A (en) * | 1976-07-21 | 1977-07-05 | Henry Lowell Byland | Package wrapping method and apparatus |
DE3641415A1 (en) * | 1986-12-04 | 1988-06-09 | Finnah Gmbh | METHOD AND DEVICE FOR RECEIVING MATERIAL SHEETS, IN PARTICULAR LID FILM SHEETS FOR PACKAGING CONTAINERS |
IT1285733B1 (en) * | 1996-06-06 | 1998-06-18 | Ima Spa | METHOD AND DEVICE FOR THE APPLICATION OF A THERMOPLASTIC COVERING TAPE TO A TAPE BY THERMO-SEALING |
US6247293B1 (en) * | 1998-11-03 | 2001-06-19 | Klockner Bartelt, Inc. | Modular packaging machine with web tension control |
DE10227610A1 (en) * | 2002-06-20 | 2004-01-15 | Multivac Sepp Haggenmüller GmbH & Co. | Packaging method and apparatus |
JP4471562B2 (en) * | 2002-09-26 | 2010-06-02 | 株式会社クレハ | Deep drawing packaging method |
CA2520991C (en) * | 2003-04-24 | 2014-08-05 | Ole-Bendt Rasmussen | Method of manufacturing an oriented film from alloyed thermoplastic polymers, apparatus for such manufacture and resulting products |
DE10319420A1 (en) * | 2003-04-29 | 2004-11-18 | Cfs Germany Gmbh | Cover film stretching device |
CN101624100B (en) * | 2005-08-19 | 2012-05-30 | 枝江奥美医疗用品有限公司 | Three-dimensional packing machine and sealing system thereof |
CN201109506Y (en) * | 2007-11-30 | 2008-09-03 | 张卫兵 | Shaping mechanism for toothbrush packaging machine |
-
2010
- 2010-10-20 DE DE102010048977A patent/DE102010048977A1/en not_active Ceased
-
2011
- 2011-10-18 ES ES11008381T patent/ES2400608T3/en active Active
- 2011-10-18 EP EP11008381A patent/EP2444324B1/en not_active Not-in-force
- 2011-10-20 US US13/277,586 patent/US9180987B2/en not_active Expired - Fee Related
- 2011-10-20 CN CN201110322038.7A patent/CN102530287B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2400608T3 (en) | 2013-04-11 |
US9180987B2 (en) | 2015-11-10 |
CN102530287A (en) | 2012-07-04 |
DE102010048977A1 (en) | 2012-04-26 |
CN102530287B (en) | 2014-07-09 |
US20120096809A1 (en) | 2012-04-26 |
EP2444324A1 (en) | 2012-04-25 |
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