EP1620317A1 - Cover film stretching device - Google Patents

Cover film stretching device

Info

Publication number
EP1620317A1
EP1620317A1 EP04729426A EP04729426A EP1620317A1 EP 1620317 A1 EP1620317 A1 EP 1620317A1 EP 04729426 A EP04729426 A EP 04729426A EP 04729426 A EP04729426 A EP 04729426A EP 1620317 A1 EP1620317 A1 EP 1620317A1
Authority
EP
European Patent Office
Prior art keywords
packaging
film
packaging machine
lidding
troughs
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.)
Granted
Application number
EP04729426A
Other languages
German (de)
French (fr)
Other versions
EP1620317B1 (en
Inventor
Thomas Wetter
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.)
GEA CFS Germany GmbH
Original Assignee
CFS Germany GmbH
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 CFS Germany GmbH filed Critical CFS Germany GmbH
Priority to PL04729426T priority Critical patent/PL1620317T3/en
Publication of EP1620317A1 publication Critical patent/EP1620317A1/en
Application granted granted Critical
Publication of EP1620317B1 publication Critical patent/EP1620317B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 present invention relates to a packaging machine, filled with the packaging trays with a packaged goods and sealed with a lid film, the packaging trays are cyclically moved along the packaging machine and the lidding film is stretched for their accurate positioning on the packaging trays. Furthermore, the present invention relates to a method for sealing a lidding film to packaging trays.
  • Packaging goods especially food, are increasingly being packed in plastic packaging nowadays.
  • plastic packaging consist of a so-called packaging tray, in which the packaged goods are filled and a lid film, which is sealed to the packaging tray and sealed with the packaging tray.
  • lidding films are increasingly printed with trademarks or product information, so that an exact positioning of the printed image of the lidding film on the packaging tray must be made before sealing.
  • the present invention is therefore based on the object of providing a packaging machine, or a method for sealing the lidding film to packaging troughs, in which the printed images of the printed lidding foil can be positioned very precisely on the packaging troughs and sealed to them.
  • the object is achieved according to the invention by a packaging machine, filled with the packaging trays with a packaged goods and sealed with a lid film in which the lidding film is stretched to their exact positioning on the packaging trays and having a stretching device that is not based on the movement of the packaging trays ,
  • the packaging machine according to the invention is simple and inexpensive to manufacture and operate.
  • the stretching device has a clamping means with which the cover film is fixed so that it can be stretched.
  • a clamping means every known in the art clamping means in question, with which the fixation of the cover sheet can be done quickly, reversibly and without affecting.
  • an inflatable tube is mentioned here.
  • the stretching device preferably has a displacement means with which the clamping means can be displaced such that the cover film stretches in the desired length.
  • the displacement means is infinitely adjustable.
  • the packaging machine according to the invention has a photocell, with the print marks, which are each arranged between two printed images, are detected.
  • the lidding film is rolled up on a film roll, which in turn is mounted on a roll holder.
  • the lidding film is preferably tensioned by a dancer.
  • Another object of the present invention is a method for sealing a lid film to packaging trays, which are cyclically moved along a packaging machine in which the lidding film is stretched for their exact positioning on the packaging trays and then sealed and in which the stretching of the lidding film not under the With the help of the movement of the packaging troughs takes place.
  • the method according to the invention has the advantage that the printed images on the cover film can be positioned very precisely on the packaging troughs.
  • the process is simple and inexpensive to perform.
  • the lid film is fixed to at least one packaging tray, particularly preferably sealed and rolled the cover sheet with the cyclical advantage of the packaging tray of a roll of film and once the preference of the packaging tray is completed, fixed by a clamping means, stretched and then sealed.
  • the actual position of print marks is written during the unwinding of the cover sheet.
  • the thus determined actual position is compared with a desired position and based on the comparison, the degree of elongation (stretching) of the lid film is determined.
  • the degree of elongation (stretching) of the lid film is determined. To avoid overexpansion of the film limits the amount of maximum stretch through the film formulation.
  • Figure 1 shows a lid film stretching device with a photocell and a stretching device with Wegvorgabe.
  • FIG. 2 shows a cover film stretching device with a displaceable photocell.
  • Figure 1 shows the packaging machine according to the invention (only partially shown), in particular the stretching device and seal.
  • the packaging troughs 1 are transported along the transport direction indicated by arrow 12 on the packaging machine.
  • the skilled person understands that several packaging trays can be arranged one behind the other in the plane of the paper.
  • the lidding film 2 is sealed onto the respective packaging cavities 1 'located in the sealing chamber.
  • the lower sealing tool 15 as shown by the double arrow, moved up and down, so that the lid film 2 is sealed under the influence of temperature and pressure on the packaging trays 1 '.
  • the lidding film Since the lidding film is connected to the packaging troughs V, during the advancement of the packaging troughs, the lidding film 2 is unrolled from the film roll 9, which is arranged on the roll holder 10. During the rolling process, the actual position of the print marks 8, which are located on the cover film and each delimiting a printed image, determined and formed in a central control unit, the difference between the actual value and a predetermined target value. This difference is then the measure of the stretch length, which results from the difference between the actual and desired value.
  • the clamping means 5 which in the present case is an inflatable tube is activated, which Cover foil 2 fixed. Subsequently, the cover sheet is stretched with the displacement means 6 by the calculated amount (stretched).
  • the displacement means is displaced counter to the running direction of the cover film.
  • the shifting means is driven in the present case by a stepping motor or servomotor. Since the lidding film is fixed in the stretching device 4, it is stretched (stretched). As soon as the stretching of the lidding film has been completed, ie the lidding foil is placed exactly above the respective packaging troughs, the sealing takes place in the prescribed manner. After the sealing operation is completed, the clamping means 5 is released again and the displacement means 6 is returned to its original position. The movement of the displacement means is symbolized by the double arrow.
  • the process is modified as follows. First, the printed image of the top film as exactly as possible on the Sub-film or deep-drawn therein packaging troughs and then determined by means of a measurement of the distance between the photocell 7 and the reference pressure mark 8 '. This distance is the so-called target value, which is transmitted for example via a control panel to a central control unit. Thereafter, the machine is turned on and the lidding film 2 sealed to the packaging tray 1 '. In each case, the bottom foil containing the packaging troughs is unrolled and the lidding foil sealed to these packaging troughs is unrolled, and with the photocell 7 the actual position of the pressure markers is determined.
  • the difference between the nominal position and the actual position is the measure of the respective stretching length. If the required stretching length exceeds the maximum stretching length permissible for the material, then the stretching of the cover film is limited to this maximum stretching length.
  • the upper film is fixed after completion of the preference by means of the clamping means 5 and the displacement means 6 displaced according to the predetermined stretching length against the film travel direction.
  • the determined target value is stored in the recipe of the film or the product to this film in the machine.
  • the print image is now automatically and extremely accurately positioned by the system by determining the print mark actual position and subsequent stretching on the lower film or the associated packaging troughs.
  • the maximum stretching length per stretch is also limited in this case in order to avoid tearing of the cover film. This maximum stretching length is also part of the stored recipe.
  • FIG. 2 shows a cover film stretching device according to FIG. 1, except that in the present case the photocell is displaceably mounted on the photocell, which is represented by the double arrow. Furthermore, the stretching device according to FIG. 2 does not have a displacement means with path presetting but a displacement means with a position deactivation. Otherwise, the comments on FIG. 1 apply.
  • the photocell is displaceable in and against the direction of film travel. Means of manual shift in this case, the photocell, the target position of the print mark is set for the respective type of film. The At first, the photocell registers whether a print mark has passed the photocell when the film has been printed. After completion of the preferential stretching device 4, the lid film 2 is stretched until the photocell 7 detects the passed print mark again.
  • the stretching device 4 is driven by a cylinder (not shown), which can not be given a route specification.
  • a cylinder not shown
  • the stretching process is terminated and the film is fixed by sealing to the packaging trays. If the print mark is not detected, the full available stroke of the cylinder is executed.
  • This embodiment of the present invention is particularly suitable for drives of the stretching device 4 without Wegvorgabe, such as cylinders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Basic Packing Technique (AREA)
  • Closing Of Containers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a packaging machine with which packaging cavities ( 3 ) are filled with a product to be packaged and are closed by a cover film ( 2 ). The packaging cavities ( 3 ) are displaced in an intermittent manner along the packaging machine, and the cover film is stretched to its exact positioning on the packaging cavities. The invention also relates to a method for sealing a cover film on packaging cavities.

Description

DeckelfolienreckeinrichtungCover film stretching device
Die vorliegende Erfindung betrifft eine Verpackungsmaschine, mit der Verpackungsmulden mit einem Verpackungsgut gefüllt und mit einer Deckelfolie verschlossen werden, wobei die Verpackungsmulden taktweise entlang der Verpackungsmaschine bewegt werden und die Deckelfolie zu deren genauen Positionierung auf den Verpackungsmulden gedehnt wird. Des weiteren betrifft die vorliegende Erfindung ein Verfahren zum Siegeln einer Deckelfolie an Verpackungsmulden.The present invention relates to a packaging machine, filled with the packaging trays with a packaged goods and sealed with a lid film, the packaging trays are cyclically moved along the packaging machine and the lidding film is stretched for their accurate positioning on the packaging trays. Furthermore, the present invention relates to a method for sealing a lidding film to packaging trays.
Verpackungsgüter, insbesondere Lebensmittel, werden heutzutage immer öfter in Kunststoffverpackungen verpackt. Diese Kunststoffverpackungen bestehen aus einer sogenannten Verpackungsmulde, in die das Verpackungsgut eingefüllt wird und einer Deckelfolie, die an die Verpackungsmulde gesiegelt und mit der die Verpackungsmulde verschlossen wird. Diese Deckelfolien sind immer öfter mit Warenzeichen oder Produktinformationen bedruckt, so dass vor dem Siegeln eine exakte Positionierung des Druckbildes der Deckelfolie auf der Verpackungsmulde vorgenommen werden muss. Des weiteren ist es für ein ansprechendes Aussehen der Verpackung wünschenswert, wenn die Deckelfolie auf die Verpackungsmulde straff gespannt gesiegelt wird. Dies wird insbesondere dadurch erreicht, dass die Druckbilder der Deckelfolie etwas kleiner sind als der zu versiegelnde Querschnitt der Verpackungsmulden, so dass die Deckelfolie vor dem Siegeln gedehnt (gereckt) werden muss.Packaging goods, especially food, are increasingly being packed in plastic packaging nowadays. These plastic packaging consist of a so-called packaging tray, in which the packaged goods are filled and a lid film, which is sealed to the packaging tray and sealed with the packaging tray. These lidding films are increasingly printed with trademarks or product information, so that an exact positioning of the printed image of the lidding film on the packaging tray must be made before sealing. Furthermore, it is desirable for a pleasing appearance of the package when the lidding film is tightly sealed to the packaging tray. This is achieved in particular in that the printed images of the cover film are slightly smaller than the cross section of the packaging troughs to be sealed, so that the cover film has to be stretched (stretched) before being sealed.
Derzeit erfolgt diese Dehnung durch den Vorzug der Verpackungsmulden, in dem das Abrollen der Deckelfolie kurz vor Beendigung des Vorzuges der Verpackungsmulden gestoppt wird. Diese Vorgehensweise hat jedoch den Nachteil, dass das Druckbild der Deckelfolie auf den Verpackungsmulden manchmal nicht hinreichend genau positioniert ist.Currently, this elongation is due to the preference of the packaging troughs, in which the rolling of the lidding film is stopped shortly before the end of the preference of the packaging troughs. However, this approach has the disadvantage that the printed image of the lidding film on the packaging trays is sometimes not positioned with sufficient accuracy.
Der vorliegenden Erfindung liegt deshalb die Aufgabe zugrunde, eine Verpackungsmaschine, bzw. ein Verfahren zum Siegeln der Deckelfolie an Verpackungsmulden zur Verfügung zu stellen, bei dem die Druckbilder der bedruckten Deckelfolie sehr exakt auf die Verpackungsmulden positioniert und an diese gesiegelt werden können.The present invention is therefore based on the object of providing a packaging machine, or a method for sealing the lidding film to packaging troughs, in which the printed images of the printed lidding foil can be positioned very precisely on the packaging troughs and sealed to them.
Gelöst wird die Aufgabe erfindungsgemäß durch eine Verpackungsmaschine, mit der Verpackungsmulden mit einem Verpackungsgut gefüllt und mit einer Deckelfolie verschlossen werden, bei der die Deckelfolie zu deren genauen Positionierung auf den Verpackungsmulden gedehnt wird und die eine Reckeinrichtung aufweist, die nicht auf der Bewegung der Verpackungsmulden basiert.The object is achieved according to the invention by a packaging machine, filled with the packaging trays with a packaged goods and sealed with a lid film in which the lidding film is stretched to their exact positioning on the packaging trays and having a stretching device that is not based on the movement of the packaging trays ,
Es war für den Fachmann überaus erstaunlich und nicht zu erwarten, dass es mit der erfindungsgemäßen Verpackungsmaschine gelingt, die Druckbilder der Deckelfolie äußerst exakt auf die Verpackungsmulden zu siegeln. Die erfindungsgemäße Verpackungsmaschine ist einfach und kostengünstig herzustellen und zu betreiben.It was extremely surprising for the person skilled in the art and it was not to be expected that with the packaging machine according to the invention it would be possible to seal the printed images of the cover film extremely precisely on the packaging troughs. The packaging machine according to the invention is simple and inexpensive to manufacture and operate.
In einer bevorzugten Ausführungsform der vorliegenden Erfindung weist die Reckeinrichtung ein Klemmmittel auf, mit dem die Deckelfolie so fixiert wird, dass sie gedehnt werden kann. Als Klemmmittel kommt jedes dem Fachmann bekannte Klemmmittel in Frage, mit dem die Fixierung der Deckelfolie schnell, reversibel und ohne deren Beeinträchtigung erfolgen kann. Beispielhaft sei hier nur ein aufblasbarer Schlauch genannt.In a preferred embodiment of the present invention, the stretching device has a clamping means with which the cover film is fixed so that it can be stretched. As a clamping means every known in the art clamping means in question, with which the fixation of the cover sheet can be done quickly, reversibly and without affecting. By way of example, only an inflatable tube is mentioned here.
Des weiteren weist die Reckeinrichtung vorzugsweise ein Verschiebemittel auf, mit dem das Klemmmittel so verschoben werden kann, dass sich die Deckelfolie in der gewünschten Länge dehnt. Vorzugsweise ist das Verschiebemittel stufenlos einstellbar.Furthermore, the stretching device preferably has a displacement means with which the clamping means can be displaced such that the cover film stretches in the desired length. Preferably, the displacement means is infinitely adjustable.
In einer besonders bevorzugten Ausführungsform weist die erfindungsgemäße Verpackungsmaschine eine Fotozelle auf, mit der Druckmarken, die jeweils zwischen zwei Druckbildern angeordnet sind, erkannt werden.In a particularly preferred embodiment, the packaging machine according to the invention has a photocell, with the print marks, which are each arranged between two printed images, are detected.
In einerweiteren bevorzugten Ausführungsform ist die Deckelfolie auf einer Folienrolle aufgerollt, die wiederum auf einem Rollenhalter gelagert ist. Die Deckelfolie wird vorzugsweise durch einen Tänzer gespannt. Ein weiterer Gegenstand der vorliegenden Erfindung ist ein Verfahren zum Siegeln einer Deckelfolie an Verpackungsmulden, die taktweise entlang einer Verpackungsmaschine bewegt werden, bei dem die Deckelfolie zu deren genauen Positionierung auf den Verpackungsmulden gedehnt und dann gesiegelt wird und bei dem die Dehnung der Deckelfolie nicht unter zur Hilfenahme der Bewegung der Verpackungsmulden erfolgt.In a further preferred embodiment, the lidding film is rolled up on a film roll, which in turn is mounted on a roll holder. The lidding film is preferably tensioned by a dancer. Another object of the present invention is a method for sealing a lid film to packaging trays, which are cyclically moved along a packaging machine in which the lidding film is stretched for their exact positioning on the packaging trays and then sealed and in which the stretching of the lidding film not under the With the help of the movement of the packaging troughs takes place.
Das erfindungsgemäße Verfahren hat den Vorteil, dass die Druckbilder auf der Deckelfolie sehr exakt auf den Verpackungsmulden positioniert werden können. Das Verfahren ist einfach und kostengünstig durchzuführen.The method according to the invention has the advantage that the printed images on the cover film can be positioned very precisely on the packaging troughs. The process is simple and inexpensive to perform.
Vorzugsweise wird die Deckelfolie an mindestens einer Verpackungsmulde fixiert, besonders bevorzugt gesiegelt und die Deckelfolie mit dem taktweisen Vorzug der Verpackungsmulde von einer Folienrolle abgerollt und sobald der Vorzug der Verpackungsmulde beendet ist, von einem Klemmmittel fixiert, gedehnt und dann gesiegelt.Preferably, the lid film is fixed to at least one packaging tray, particularly preferably sealed and rolled the cover sheet with the cyclical advantage of the packaging tray of a roll of film and once the preference of the packaging tray is completed, fixed by a clamping means, stretched and then sealed.
In einer besonders bevorzugten Ausführungsform wird während des Abrollens der Deckelfolie die Ist-Position von Druckmarken verfasst. Die so ermittelte Ist-Position wird mit einer Soll-Position verglichen und basierend auf dem Vergleich wird das Maß der Dehnung (Reckung) der Deckelfolie ermittelt. Um zu vermeiden, dass die Folie überdehnt wird, wird dass Maß der maximalen Dehnung durch die Folienrezeptur begrenzt.In a particularly preferred embodiment, the actual position of print marks is written during the unwinding of the cover sheet. The thus determined actual position is compared with a desired position and based on the comparison, the degree of elongation (stretching) of the lid film is determined. To avoid overexpansion of the film limits the amount of maximum stretch through the film formulation.
Im folgenden wird die Erfindung anhand der Figuren 1 und 2 erläutert. Diese Erläuterungen sind lediglich beispielhaft und schränken den allgemeinen Erfindungsgedanken nicht ein.In the following the invention will be explained with reference to Figures 1 and 2. These explanations are merely exemplary and do not limit the general inventive concept.
Figur 1 zeigt eine Deckelfolienreckeinrichtung mit einer Fotozelle und einer Reckeinrichtung mit Wegvorgabe.Figure 1 shows a lid film stretching device with a photocell and a stretching device with Wegvorgabe.
Figur 2 zeigt eine Deckelfolienreckeinrichtung mit einer verschiebbaren Fotozelle. Figur 1 zeigt die erfindungsgemäße Verpackungsmaschine (nur teilweise dargestellt), insbesondere die Reckeinrichtung und Siegelung. Die Verpackungsmulden 1 werden entlang der mit Pfeil 12 gekennzeichneten Transportrichtung auf der Verpackungsmaschine transportiert. Der Fachmann versteht, dass in der Papierebene mehrere Verpackungsmulden hintereinander angeordnet sein können. In der Siegelkammer 14 wird die Deckelfolie 2 auf die jeweils in der Siegelkammer befindlichen Verpackungsmulden 1' gesiegelt. Dafür wird das untere Siegelwerkzeug 15, wie durch den Doppelpfeil dargestellt, hoch und runter gefahren, so dass die Deckelfolie 2 unter Temperatur- und Druckeinfluss an die Verpackungsmulden 1' gesiegelt wird. Sobald der Siegelvorgang abgeschlossen ist, werden die Verpackungsmulden weiter transportiert. Da die Deckelfolie mit den Verpackungsmulden V verbunden ist, wird bei dem Vorschub der Verpackungsmulden die Deckelfolie 2 von der Folienrolle 9, die auf dem Rollenhalter 10 angeordnet ist, abgerollt. Während des Abrollvorgangs wird die Ist-Position der Druckmarken 8, die sich auf der Deckelfolie befinden und jeweils ein Druckbild begrenzen, ermittelt und in einer zentralen Steuereinheit die Differenz zwischen dem Ist-Wert und einem vorgegebenen Soll-Wert gebildet. Diese Differenz ist sodann das Maß für die Recklänge, das sich aus der Differenz zwischen Ist- und Sollwert ergibt.. Nachdem der Vorzug der Verpackungsmulden beendet ist, wird das Klemmmittel 5, das in dem vorliegenden Fall ein aufblasbarer Schlauch ist, aktiviert, das die Deckelfolie 2 fixiert. Anschließend wird die Deckelfolie mit dem Verschiebemittel 6 um das errechnete Maß gereckt (gedehnt). Dafür wird das Verschiebemittel entgegen der Laufrichtung der Deckelfolie verschoben. Das Verschiebemittel wird in dem vorliegenden Fall durch einen Schrittmotor oder Servomotor angetrieben. Da die Deckelfolie in der Reckeinrichtung 4 fixiert ist, wird sie gedehnt (gereckt). Sobald die Dehnung der Deckelfolie abgeschlossen ist, d. h. die Deckelfolie exakt über den jeweiligen Verpackungsmulden platziert ist, erfolgt die Siegelung in der vorgeschriebenen Weise. Nachdem der Siegelvorgang beendet ist, wird das Klemmmittel 5 wieder gelöst und das Verschiebemittel 6 in seine Ausgangsposition zurückgebracht. Die Bewegung des Verschiebemittels ist durch den Doppelpfeil symbolisiert.FIG. 2 shows a cover film stretching device with a displaceable photocell. Figure 1 shows the packaging machine according to the invention (only partially shown), in particular the stretching device and seal. The packaging troughs 1 are transported along the transport direction indicated by arrow 12 on the packaging machine. The skilled person understands that several packaging trays can be arranged one behind the other in the plane of the paper. In the sealing chamber 14, the lidding film 2 is sealed onto the respective packaging cavities 1 'located in the sealing chamber. For this, the lower sealing tool 15, as shown by the double arrow, moved up and down, so that the lid film 2 is sealed under the influence of temperature and pressure on the packaging trays 1 '. Once the sealing process is completed, the packaging trays are transported on. Since the lidding film is connected to the packaging troughs V, during the advancement of the packaging troughs, the lidding film 2 is unrolled from the film roll 9, which is arranged on the roll holder 10. During the rolling process, the actual position of the print marks 8, which are located on the cover film and each delimiting a printed image, determined and formed in a central control unit, the difference between the actual value and a predetermined target value. This difference is then the measure of the stretch length, which results from the difference between the actual and desired value. After the preference of the packaging trays is completed, the clamping means 5, which in the present case is an inflatable tube is activated, which Cover foil 2 fixed. Subsequently, the cover sheet is stretched with the displacement means 6 by the calculated amount (stretched). For this purpose, the displacement means is displaced counter to the running direction of the cover film. The shifting means is driven in the present case by a stepping motor or servomotor. Since the lidding film is fixed in the stretching device 4, it is stretched (stretched). As soon as the stretching of the lidding film has been completed, ie the lidding foil is placed exactly above the respective packaging troughs, the sealing takes place in the prescribed manner. After the sealing operation is completed, the clamping means 5 is released again and the displacement means 6 is returned to its original position. The movement of the displacement means is symbolized by the double arrow.
Bei der Verarbeitung einer neuen Deckelfolie, wird das Verfahren wie folgt modifiziert. Zunächst wird das Druckbild der Oberfolie möglichst exakt auf die Unterfolie bzw. die darin tiefgezogenen Verpackungsmulden angelegt und dann mittels einer Messung der Abstand zwischen der Fotozelle 7 und der Referenzdruckmarke 8' ermittelt. Dieser Abstand ist der sogenannte Soll-Wert, der beispielsweise über ein Bedienpult an eine zentrale Steuerungseinheit übermittelt wird. Danach wird die Maschine eingeschaltet und die Deckelfolie 2 an die Verpackungsmulde 1 ' gesiegelt. Bei jedem Vorzug, der die Verpackungsmulden aufweisenden Unterfolie wird die an diese Verpackungsmulden gesiegelte Deckelfolie abgerollt und mit der Fotozelle 7 die Ist-Position der Druckmarken ermittelt. Die Differenz der Soll-Position zur Ist-Position ist das Maß für die jeweilige Recklänge. Sollte die benötigte Recklänge die für das Material zulässige maximale Recklänge überschreiten, so wird die Reckung der Deckelfolie auf diese maximale Recklänge beschränkt. Für die Reckung wird die Oberfolie nach beendetem Vorzug mittels des Klemmmittels 5 fixiert und das Verschiebemittel 6 entsprechend der vorgegebenen Recklänge entgegen der Folienlaufrichtung verschoben. Der ermittelte Soll-Wert wird in die Rezeptur der Folie bzw. des Produktes zu dieser Folie in der Maschine abgespeichert.When processing a new lidding film, the process is modified as follows. First, the printed image of the top film as exactly as possible on the Sub-film or deep-drawn therein packaging troughs and then determined by means of a measurement of the distance between the photocell 7 and the reference pressure mark 8 '. This distance is the so-called target value, which is transmitted for example via a control panel to a central control unit. Thereafter, the machine is turned on and the lidding film 2 sealed to the packaging tray 1 '. In each case, the bottom foil containing the packaging troughs is unrolled and the lidding foil sealed to these packaging troughs is unrolled, and with the photocell 7 the actual position of the pressure markers is determined. The difference between the nominal position and the actual position is the measure of the respective stretching length. If the required stretching length exceeds the maximum stretching length permissible for the material, then the stretching of the cover film is limited to this maximum stretching length. For the stretching, the upper film is fixed after completion of the preference by means of the clamping means 5 and the displacement means 6 displaced according to the predetermined stretching length against the film travel direction. The determined target value is stored in the recipe of the film or the product to this film in the machine.
Bei einem Wechsel der Deckelfolie wird lediglich die Folie in die Verpackungsmaschine eingelegt und die entsprechende Rezeptur und damit der Sollwert aus einer zentralen Steuereinheit geladen. Nach dem Maschinenstart wird das Druckbild nunmehr von dem System durch Bestimmung der Druckmarken-Ist- Position und anschließender Reckung automatisch und äußerst exakt auf der Unterfolie bzw. den dazugehörigen Verpackungsmulden positioniert. Die maximale Recklänge pro Reckung ist auch hierbei begrenzt, um ein Reißen der Deckelfolie zu vermeiden. Diese maximale Recklänge ist ebenfalls Teil der gespeicherten Rezeptur.When changing the lid film, only the film is inserted into the packaging machine and loaded the appropriate recipe and thus the setpoint from a central control unit. After the machine has been started, the print image is now automatically and extremely accurately positioned by the system by determining the print mark actual position and subsequent stretching on the lower film or the associated packaging troughs. The maximum stretching length per stretch is also limited in this case in order to avoid tearing of the cover film. This maximum stretching length is also part of the stored recipe.
Figur 2 zeigt eine Deckelfolienreckeinrichtung gemäß Figur 1 , nur dass in dem vorliegenden Fall die Fotozelle die Fotozelle verschiebbar gelagert ist, was durch den Doppelpfeil dargestellt ist. Des weiteren verfügt die Reckeinrichtung gemäß Figur 2 nicht über ein Verschiebemittel mit Wegvorvorgabe sondern ein Verschiebemittel mit einer Positionsabschaltung. Ansonsten gelten die Ausführungen zu Figur 1. Wie berteits erläutert ist die Fotozelle in und gegen die Folienlaufrichtung verschiebbar. Mittel der in vorliegenden Fall manuellen Verschiebung der Fotozelle wird die Sollposition der Druckmarke für die jeweilige Folienart eingestellt. Die Fotozelle registriert zunächst einmal, ob beim Folienvorzug eine Druckmarke an der Fotozelle vorbeigelaufen ist. Nach Abschluss des Vorzugs reckt die Reckeinrichung 4 die Deckelfolie 2 so lange bis die Fotozelle 7 die vorbeigelaufene Druckmarke wieder erkennt. In dem vorliegenden Fall wird die Reckeinrichtung 4 von einem Zylinder (nicht dargestellt) angetrieben, dem keine Wegvorgabe gegeben werden kann. Bei erkannter Druckmarke wird der Reckvorgang beendet und die Folie durch Siegelung an den Verpackungsmulden fixiert. Wird die Druckmarke nicht erkannt, wird der volle zur Verfügung stehende Hub des Zylinders ausgeführt. Diese Ausführungsform der vorliegenden Erfindung eignet sich insbesondere für Antriebe der Reckeinrichtung 4 ohne Wegvorgabe, wie beispielsweise Zylinder.FIG. 2 shows a cover film stretching device according to FIG. 1, except that in the present case the photocell is displaceably mounted on the photocell, which is represented by the double arrow. Furthermore, the stretching device according to FIG. 2 does not have a displacement means with path presetting but a displacement means with a position deactivation. Otherwise, the comments on FIG. 1 apply. As explained above, the photocell is displaceable in and against the direction of film travel. Means of manual shift in this case, the photocell, the target position of the print mark is set for the respective type of film. The At first, the photocell registers whether a print mark has passed the photocell when the film has been printed. After completion of the preferential stretching device 4, the lid film 2 is stretched until the photocell 7 detects the passed print mark again. In the present case, the stretching device 4 is driven by a cylinder (not shown), which can not be given a route specification. When detected print mark the stretching process is terminated and the film is fixed by sealing to the packaging trays. If the print mark is not detected, the full available stroke of the cylinder is executed. This embodiment of the present invention is particularly suitable for drives of the stretching device 4 without Wegvorgabe, such as cylinders.
Alle zu der erfindungsgemäßen Vorrichtungen gemachten Ausführungen gelten analog für das erfindungsgemäße Verfahren und umgekehrt. All statements made with regard to the devices according to the invention apply analogously to the method according to the invention and vice versa.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
1 ,1' Verpackungsmulde1, 1 'packaging tray
2 Deckelfolie2 lidding foil
3 Verpackungsmulde3 packaging trough
4 Reckeinrichtung4 stretching device
5 Klemmmittel5 clamping means
6 Verschiebemittel6 shifting means
7 Photozelle7 photocell
8,8' Druckmarken, Referenzdruckmarke8,8 'print marks, reference print mark
9 Folienrolle9 film roll
10 Rollenhalter10 roll holders
11 Tänzer11 dancers
12 Transportrichtung12 transport direction
13 Rollen13 roles
14 Siegelkammer14 sealed chamber
15 Unteres Siegelwerkzeug 15 Lower sealing tool

Claims

Patentansprüche: claims:
1. Verpackungsmaschine, mit der Verpackungsmulden (3) mit einem Verpackungsgut gefüllt und mit einer Deckelfolie (2) verschlossen werden, wobei die Verpackungsmulden taktweise entlang der Verpackungsmaschine bewegt werden und die Deckelfolie (2) zu deren genauen Positionierung auf den Verpackungsmulden gedehnt wird, dadurch gekennzeichnet, dass sie eine Reckeinrichtung (4) aufweist, die nicht auf der Bewegung der Verpackungsmulden basiert.1. Packaging machine, filled with the packaging troughs (3) with a packaged goods and sealed with a lid film (2), wherein the packaging troughs are cyclically moved along the packaging machine and the lidding film (2) is stretched for their exact positioning on the packaging trays, characterized characterized in that it comprises a stretching device (4) which is not based on the movement of the packaging troughs.
2. Verpackungsmaschine nach Anspruch 1 , dadurch gekennzeichnet, dass die Reckeinrichtung ein Klemmittel (5) für die Deckelfolie und ein Verschiebemittel (6) aufweist.2. Packaging machine according to claim 1, characterized in that the stretching device comprises a clamping means (5) for the cover film and a displacement means (6).
3. Verpackungsmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass sie eine Fotozelle (7) aufweist, die Druckmarken (8) erkennt.3. Packaging machine according to one of the preceding claims, characterized in that it comprises a photocell (7) which detects print marks (8).
4. Verpackungsmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Deckelfolie als Folienrolle (9) auf einem Rollenhalter (10) gelagert ist.4. Packaging machine according to one of the preceding claims, characterized in that the lid film is mounted as a film roll (9) on a roll holder (10).
5. Verpackungsmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass die Deckelfolie (2) durch einen Tänzer (11) spannbar ist.5. Packaging machine according to one of the preceding claims, characterized in that the cover film (2) by a dancer (11) can be tensioned.
6. Verfahren zum Siegeln einer Deckelfolie (2) an Verpackungsmulden (1 ), die taktweise entlang einer Verpackungsmaschine bewegt werden und bei dem die Deckelfolie (2) zu deren genauer Positionierung auf den Verpackungsmulden gedehnt und dann gesiegelt wird, dadurch gekennzeichnet, dass die Dehnung der Deckelfolie nicht unter Zuhilfenahme der Bewegung der Verpackungsmulden erfolgt. 6. A method for sealing a lidding film (2) on packaging trays (1), which are cyclically moved along a packaging machine and in which the lidding film (2) is stretched for their exact positioning on the packaging trays and then sealed, characterized in that the elongation the lid film is not carried out with the aid of the movement of the packaging trays.
7. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Deckelfolie an mindestens einer Verpackungsmulde fixiert, die Deckelfolie (2) mit der Bewegung der Verpackungsmulden (1) von einer Folienrolle (9) abgerollt, von dem Klemmmittel (5) fixiert, gedehnt und dann gesiegelt wird.7. The method according to claim 1, characterized in that the lid film is fixed to at least one packaging tray, the lid film (2) with the movement of the packaging troughs (1) of a film roll (9) unrolled, of the clamping means (5) fixed, stretched and then sealed.
8. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass während des Abrollens der Deckelfolie die Istposition von Druckmarken (8) erfasst wird.8. The method according to claim 6 or 7, characterized in that during the rolling of the lid film, the actual position of print marks (8) is detected.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass aufgrund der Differenz zwischen Istposition und Sollposition das Maß der Dehnung ermittelt wird.9. The method according to claim 8, characterized in that due to the difference between the actual position and the target position, the degree of elongation is determined.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass das Maß der Dehnung aufgrund der Folienrezeptur begrenzt wird. 10. The method according to claim 9, characterized in that the degree of elongation is limited due to the film formulation.
EP04729426A 2003-04-29 2004-04-26 Cover film stretching device Expired - Lifetime EP1620317B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04729426T PL1620317T3 (en) 2003-04-29 2004-04-26 Cover film stretching device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10319420A DE10319420A1 (en) 2003-04-29 2003-04-29 Cover film stretching device
PCT/EP2004/004394 WO2004096645A1 (en) 2003-04-29 2004-04-26 Cover film stretching device

Publications (2)

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EP1620317A1 true EP1620317A1 (en) 2006-02-01
EP1620317B1 EP1620317B1 (en) 2006-11-02

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ID=33305047

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EP04729426A Expired - Lifetime EP1620317B1 (en) 2003-04-29 2004-04-26 Cover film stretching device

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US (1) US20070056252A1 (en)
EP (1) EP1620317B1 (en)
CN (1) CN1860063A (en)
AT (1) ATE344184T1 (en)
DE (2) DE10319420A1 (en)
DK (1) DK1620317T3 (en)
ES (1) ES2299834T3 (en)
NO (1) NO20054978L (en)
PL (1) PL1620317T3 (en)
WO (1) WO2004096645A1 (en)

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DE102010048977A1 (en) * 2010-10-20 2012-04-26 Multivac Sepp Haggenmüller Gmbh & Co. Kg Thermoforming packaging machine and method for stretching a film web
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ES2897652T3 (en) * 2014-12-05 2022-03-02 Gea Food Solutions Germany Gmbh Rotation beam for a packaging machine
CN105966060A (en) * 2016-07-04 2016-09-28 贵州劲瑞新型包装材料有限公司 Positioning printing system and method for pattern on film
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DE102019205171A1 (en) * 2019-04-11 2020-10-15 Syntegon Technology Gmbh Method and device for processing a cover of a packaging
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Also Published As

Publication number Publication date
US20070056252A1 (en) 2007-03-15
EP1620317B1 (en) 2006-11-02
ES2299834T3 (en) 2008-06-01
CN1860063A (en) 2006-11-08
DK1620317T3 (en) 2007-03-26
NO20054978L (en) 2005-10-26
DE10319420A1 (en) 2004-11-18
PL1620317T3 (en) 2007-05-31
DE502004001910D1 (en) 2006-12-14
WO2004096645A1 (en) 2004-11-11
ATE344184T1 (en) 2006-11-15

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