EP2011734B1 - Machine d'emballage et procédé de fabrication d'emballage à partir d'une feuille - Google Patents

Machine d'emballage et procédé de fabrication d'emballage à partir d'une feuille Download PDF

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Publication number
EP2011734B1
EP2011734B1 EP08011950A EP08011950A EP2011734B1 EP 2011734 B1 EP2011734 B1 EP 2011734B1 EP 08011950 A EP08011950 A EP 08011950A EP 08011950 A EP08011950 A EP 08011950A EP 2011734 B1 EP2011734 B1 EP 2011734B1
Authority
EP
European Patent Office
Prior art keywords
pressure
proportional controller
flow rate
volumetric flow
film
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.)
Active
Application number
EP08011950A
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German (de)
English (en)
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EP2011734A1 (fr
Inventor
Elmar Ehrmann
Herbert Kirmse
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.)
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Publication of EP2011734A1 publication Critical patent/EP2011734A1/fr
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Publication of EP2011734B1 publication Critical patent/EP2011734B1/fr
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing 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
    • B65B9/02Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04Enclosing 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B47/00Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • B65B47/08Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved by application of fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00Automatic control, checking, warning, or safety devices

Definitions

  • the present invention relates to a packaging machine and a method for producing packages from a film.
  • the provision of pressure is necessary for heating the film, forming the film and sealing the packaging.
  • the pressure is controlled by manually adjustable filling times or manual pressure regulator, ie a certain pressure is generated over the opening of a valve for a predetermined time.
  • the pressure is subject to fluctuations and a reproducibility is not given. This is particularly disadvantageous because different packaging forms and films in a packaging machine require different settings, so that it depends on the reproducibility.
  • the object of the invention is to provide an improved packaging machine and an improved method for producing packages from a film, which avoid the disadvantages mentioned above.
  • An advantage of the packaging machine or of the method for producing packs from a film is the reproducibility of the pack-specific parameters.
  • the control over the proportional controller is applicable to various work stations of a packaging machine, such as forming station, sealing station, etc.
  • the controller can also be used as a valve, which compared to the conventional systems that require a valve and a pressure regulator, a component is saved.
  • a further advantageous application of the invention results in the gassing process.
  • Another advantage of the invention is the quality control made possible by the reproducibility of the process. There are no errors due to manual adjustability of pressures. The required values can be stored depending on the process and retrieved automatically. The control system ensures that the same pressure is present in the device throughout the entire process time.
  • a packaging machine 1 comprises one or more forming stations 2, one or more evacuating and sealing stations 3, and a cutting station 4.
  • On the input side there is provided a supply for a lower film 7 from the input side through the stations to the exit side End is led.
  • a forms of containers 8 These are subsequently filled with the goods to be packaged.
  • an upper film 10 is fed in front of the entrance to the evacuation and sealing station 3 onto the upper side of the lower film 7, as it were, as cover for the containers 8.
  • the deep-drawn pack is evacuated and sealed.
  • the cutting station 4 the packages are last separated.
  • the forming station 2 is based on Fig. 2 described.
  • the forming station 2 has a chamber upper part 23b and a lower chamber part 23a, and a heating plate 22 provided in the upper chamber part 23b.
  • Both the chamber lower part 23a, and the upper chamber part 23b are each connected to a compressed air supply 26a, 26b, respectively, which in turn are connected to a pressure source 27 for providing positive or negative pressure.
  • Each compressed air supply is preceded by a proportional controller 24 or 25.
  • the lower film 7 can be clamped between the lower chamber part 23a and the upper chamber part 23b and heated by the heating plate 22.
  • a defined pressure is required to prevent prints and clouding of the film.
  • the pressure is generated via the proportional controller 24.
  • the proportional controller 25 is used to apply a defined pressure to the lower chamber part for forming the lower film.
  • Fig. 3 shows the connection between the proportional controller 24 and 25 of a machine controller 28 and the forming station 2.
  • the proportional controller 24 and 25 includes a valve 29 and a control electronics 30 for the valve.
  • the machine controller 28 is designed such that it provides the control electronics 30 of the proportional controller 24, 25 a voltage value, for example 0-10V, which corresponds to a pressure setpoint.
  • the control electronics 30 controls the valve 29 to equalize the actual pressure, which is measured in the workstation by means of a measuring device, to the predetermined desired value.
  • different voltage potentials are assigned pressures or valve cross sections.
  • the forming station 2 is used to form containers made of film by means of compressed air and / or by means of vacuum with or without a punch.
  • the film 7 is clamped and first heated on the heating plate 22.
  • the film is formed by means of a set pressure and / or by means of vacuum with or without a punch as quickly as possible and thereby with uniform wall thickness and low cooling during the molding process.
  • the set pressure depending on the film thickness, drawing depth and container shape, essentially determines the result.
  • the control is carried out so that at the beginning of the deformation, the valve is briefly fully opened in order to achieve the fastest possible deformation, and then the pressure is limited and readjusted.
  • Fig. 1 and Fig. 2 exemplified the preparation of a pack.
  • the lower film is deformed in the forming station 2, so that a container is formed.
  • the lower film 7 is first clamped in the forming station 2 between the lower chamber part 23a and the upper chamber part 23b.
  • the film is pressed by the overpressure provided by the proportional controller 24 in the direction of the heating plate 22 and heated by it.
  • the film is deformed by providing overpressure by the proportional regulator 25 in the direction of the chamber lower part 23a.
  • the film cools down, the shape of the pack is retained.
  • the set pressure depending on the film thickness, drawing depth and container shape, essentially determines the result.
  • the pressures in the shaping device 2 are set by the electronic proportional regulators 24, 25.
  • the pressures can be set via a machine display and stored depending on the process become. Due to the control and regulation system integrated in the proportional controller, the pressure currently present in the device will be absorbed and thus reproducible. The control can also be performed by the machine controller 28.
  • the forming station is brought in a very short time via the proportional controller 24, 25 to the set and necessary for the deformation pressure and kept until the film 7 and thus permanent deformation at this pressure. Subsequently, the pressure is preferably released as quickly as possible from the device into the atmosphere.
  • the container is then filled (not shown) and then closed with the lid film 10 in the sealing station 3 and previously gassed if necessary. Subsequently, the packages are separated in the cutting station 4.
  • Fig. 4a is a comparison of the inventive proportional controller with a conventional proportional controller shown in a pressure-time diagram.
  • the inventive proportional controller has a faster response time than the conventional controller. How out Fig. 4a As can be seen, eliminates a sluggish regulation at the beginning of the pressure change. Due to a large filling volume, the pressure can rise quickly, so no careful control at the beginning is necessary. Due to the known, relatively large volume of the area to be fumigated, to be filled or to be evacuated, with respect to the maximum pressure, an optimization of the proportional regulator is possible. This is achieved by the electronic control of the proportional controller. The required sensors is inside the controller. The measuring and control system of the proportional controller or the machine controller 28 prevents overpressure, with leakages the pressure is readjusted.
  • Fig. 4b is in a flow-time diagram, the comparison of a conventional proportional controller (a), a combination of a valve and manual pressure regulator limiter (b) and a special control for the gassing process with the proportional flow controller (c) according to the invention.
  • a conventional proportional controller a combination of a valve and manual pressure regulator limiter (b) and a special control for the gassing process
  • a special control for the gassing process with the proportional flow controller (c) according to the invention.
  • a gentle increase in the volume flow initially takes place in order to prevent inflation of the pack, especially for smaller chambers.
  • Fig. 5a (left in the picture) the pressure build-up during the heating process without a proportional controller is shown on the basis of graph 40a.
  • the heating pressure initially rises above the setpoint and then drops below the desired value due to leakage.
  • Another disadvantage is that the desired pressure can not be adjusted, but can only be achieved over the time t with great deviation.
  • Fig. 5b (right in the picture) the pressure build-up during the forming process without a proportional controller is shown on the basis of the graph 40b.
  • the mold pressure initially rises slightly above the desired value (setpoint) and then falls due to leakage far below the desired value.
  • setpoint the desired value
  • a disadvantage is that the desired pressure can not be set, but can only be achieved over time t with great deviation.
  • Fig. 6a (left in the picture) the pressure build-up during the heating process with proportional controller is shown on the basis of the graph 41a.
  • the heating pressure rises to the desired value Setpoint. Overshoot is in the tolerance field. It then remains at the set pressure until the end of the set time regardless of any leaks.
  • One advantage is that the desired pressure can be set via the operator terminal.
  • Fig. 6b (right in the picture) the pressure build-up during the forming process with proportional controller is shown on the basis of graph 41b.
  • the mold pressure rises to the setpoint. Overshoot is in the tolerance field. It then remains at the set pressure until the end of the set time regardless of any leaks.
  • One advantage is that the desired pressure can be set via the operator terminal.
  • the proportionality controller is preferably used in the forming station in which the film is molded for packaging.
  • all workstations of a packaging machine can be equipped with the device according to the invention, or work according to the inventive method.
  • the upper and lower parts are pressed together by providing pressure and then sealed. Through an air cushion, the pressure can be selectively built up and maintained.
  • Another example of the device according to the invention is a workstation having a gassing device.
  • a gassing device Here, an initially gentle, later a steep increase in the volume flow is desirable.
  • the pressure is measured and regulated and is accordingly readjusted during the work process in order to achieve an optimal result.
  • a throttle valve may also be provided to throttle the suction rate at vacuum.
  • a variable flap control in the form of a proportional flow controller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Vacuum Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (10)

  1. Machine d'emballage (1) pour fabriquer des emballages à partir d'une feuille (7), avec au moins une station de travail (2, 3) dans laquelle on agit sur la feuille (7) à l'aide d'une dépression ou d'une surpression, la pression et/ou le débit volumique étant réglés à l'aide d'un régulateur proportionnel (24, 25), et le régulateur proportionnel (24, 25) comportant une soupape (29) et un système électronique de régulation (30) qui règle la soupape (29) en fonction d'une valeur théorique de pression prédéfinie et/ou d'une valeur théorique de débit volumique et d'une valeur réelle de pression et/ou de débit volumique mesurée, caractérisée en ce que la station de travail est une station de formage (2), et en ce que la régulation est conçue de telle sorte qu'au début de la déformation, la soupape (29) s'ouvre temporairement complètement puis limite et rajuste la pression.
  2. Machine d'emballage selon la revendication 1, caractérisée en ce que le régulateur proportionnel (24, 25) est relié à une commande de machine (28) à partir de laquelle il reçoit une valeur théorique de pression prédéfinie et/ou une valeur théorique de débit volumique et par laquelle il est réglé.
  3. Machine d'emballage selon la revendication 1 ou 2, caractérisée en ce qu'une pression et/ou un débit volumique prédéfinis qui doivent être réglés par l'intermédiaire du régulateur proportionnel (24, 25) sont de préférence aptes à être réglés par l'intermédiaire d'un affichage et à être stockés dans une mémoire.
  4. Machine d'emballage selon l'une des revendications 1 à 3, caractérisée en ce que le régulateur proportionnel (24, 25) est conçu pour que la pression et/ou le débit volumique puissent être rajustés pendant l'opération.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que le régulateur proportionnel (24, 25) est conçu pour que la pression qui règne sur le moment dans la station de travail (2, 3) puisse être détectée.
  6. Procédé pour fabriquer des emballages à partir d'une feuille (7) dans une machine d'emballage (1) avec au moins une station de travail (2, 3) dans laquelle on agit sur la feuille (7) à l'aide d'une dépression ou d'une surpression afin de former un emballage, la pression et/ou le débit volumique étant réglés à l'aide d'un régulateur proportionnel (24, 25), et une soupape (29) étant réglée grâce à un système électronique de régulation (30) du régulateur proportionnel (24, 25) en fonction d'une valeur théorique de pression prédéfinie et/ou d'une valeur théorique de débit volumique et d'une valeur réelle de pression et/ou de débit volumique mesurée, caractérisé en ce que le réglage se fait de telle sorte qu'au début de la déformation, la soupape (29) s'ouvre temporairement complètement et que la pression soit ensuite limitée et rajustée.
  7. Procédé selon la revendication 6, selon lequel une valeur théorique de pression prédéfinie et/ou une valeur théorique de débit volumique sont transmises grâce à une commande de machine (28) reliée au régulateur proportionnel (24, 25).
  8. Procédé selon la revendication 6 ou 7, caractérisé en ce qu'une pression et/ou un débit volumique prédéfinis qui doivent être réglés par l'intermédiaire du régulateur proportionnel (24, 25) sont réglés par l'intermédiaire d'un affichage et sont stockés dans une mémoire.
  9. Procédé selon l'une des revendications 6 à 8, caractérisé en ce que le régulateur proportionnel (24, 25) est conçu pour que la pression et/ou le débit volumique sont rajustés pendant l'opération.
  10. Procédé selon l'une des revendications 6 à 9, caractérisé en ce que le régulateur proportionnel (24, 25) est conçu pour que la pression qui règne sur le moment dans la station de travail (2, 3) puisse être détectée.
EP08011950A 2007-07-06 2008-07-02 Machine d'emballage et procédé de fabrication d'emballage à partir d'une feuille Active EP2011734B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007031527A DE102007031527B3 (de) 2007-07-06 2007-07-06 Verpackungsmaschine und Verfahren zum Herstellen von Packungen aus einer Folie

Publications (2)

Publication Number Publication Date
EP2011734A1 EP2011734A1 (fr) 2009-01-07
EP2011734B1 true EP2011734B1 (fr) 2011-03-02

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EP08011950A Active EP2011734B1 (fr) 2007-07-06 2008-07-02 Machine d'emballage et procédé de fabrication d'emballage à partir d'une feuille

Country Status (5)

Country Link
US (1) US8091322B2 (fr)
EP (1) EP2011734B1 (fr)
AT (1) ATE500141T1 (fr)
DE (2) DE102007031527B3 (fr)
ES (1) ES2361114T3 (fr)

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US11111040B2 (en) 2018-01-08 2021-09-07 Multivac Sepp Haggenmueller Se & Co. Kg Packaging machine with pressure control device and method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11111040B2 (en) 2018-01-08 2021-09-07 Multivac Sepp Haggenmueller Se & Co. Kg Packaging machine with pressure control device and method

Also Published As

Publication number Publication date
ATE500141T1 (de) 2011-03-15
EP2011734A1 (fr) 2009-01-07
US20090071100A1 (en) 2009-03-19
US8091322B2 (en) 2012-01-10
DE102007031527B3 (de) 2008-06-19
DE502008002708D1 (de) 2011-04-14
ES2361114T3 (es) 2011-06-14

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