EP2412637B1 - Packaging machine with multiple work stations - Google Patents

Packaging machine with multiple work stations Download PDF

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Publication number
EP2412637B1
EP2412637B1 EP10007915.1A EP10007915A EP2412637B1 EP 2412637 B1 EP2412637 B1 EP 2412637B1 EP 10007915 A EP10007915 A EP 10007915A EP 2412637 B1 EP2412637 B1 EP 2412637B1
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EP
European Patent Office
Prior art keywords
packaging machine
shaft
packaging
movement
station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10007915.1A
Other languages
German (de)
French (fr)
Other versions
EP2412637A1 (en
Inventor
Elmar Ehrmann
Klaus Weiss
Andreas Streitenberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
Original Assignee
Multivac Sepp Haggenmueller GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Multivac Sepp Haggenmueller GmbH and Co KG filed Critical Multivac Sepp Haggenmueller GmbH and Co KG
Priority to ES10007915T priority Critical patent/ES2411957T3/en
Priority to EP10007915.1A priority patent/EP2412637B1/en
Priority to CN201110216919.0A priority patent/CN102424150B/en
Priority to US13/193,923 priority patent/US8720169B2/en
Publication of EP2412637A1 publication Critical patent/EP2412637A1/en
Application granted granted Critical
Publication of EP2412637B1 publication Critical patent/EP2412637B1/en
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Anticipated expiration legal-status Critical

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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
    • B65B51/00Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10Applying or generating heat or pressure or combinations thereof
    • B65B51/14Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B65/00Details peculiar to packaging machines and not otherwise provided for; Arrangements of such details
    • B65B65/02Driving gear

Definitions

  • the invention relates to a packaging machine with a plurality of mutually operable in common and a direction of production of the packaging machine defining, e.g. in the production direction successively arranged workstations, each with at least one movable tool part.
  • the packaging machine may be a thermoforming packaging machine.
  • several workstations are consecutively run through from the packaging material in order to carry out different work steps in time sequence on the packaging material and / or on the products to be packaged. For example, while packaging trays are deep-drawn in a forming station, or prefabricated trays are removed from a destacker, the packaging trays or trays are filled, the packages are evacuated and / or fumigated, they are sealed with a lidding film or sealed with a slip lid and possibly the Packaging still isolated, checked and / or sorted out. These steps are carried out in workstations, each of which usually has at least one movable tool part. Both in an intermittent operation of the packaging machine, as well as in a continuous operation, the moving tool parts of the individual workstations must be synchronized with each other to ensure a smooth operation of the packaging machine.
  • thermoforming machine in the form of a thermoforming machine known.
  • This machine has a forming station for forming packaging trays in a lower film, as well as a filling station and a sealing station.
  • a mechanism is provided for each of the workstations to implement the rotation of an electric motor in a lifting movement of a tool part of the respective workstation, ie, for example, the mold of the forming station or a chamber part of the sealing station.
  • a belt couples the movement of several shafts lying transversely to the direction of production of the packaging machine, the rotational movement of each of which is translated into a lifting movement of the respective tool part.
  • a disadvantage of this conventional packaging machine is that for the different workstations each individual drives must be used. Above all, it is difficult to synchronize the movement of the tools of the different workstations with each other.
  • CN 2 695 356 Y From the CN 2 695 356 Y is a packaging machine with several mutually operable in common mode by means of a common rotatably driven shaft workstations known. The movement of the tool parts of the workstations is transferred via transfer mechanisms from the movement of the shaft.
  • Object of the present invention is to improve a packaging machine with structurally simple means as possible with respect to a variable use of the machine.
  • the invention provides that the packaging machine has a rotatably driven shaft arranged in the production direction of the packaging machine, and that at least one transfer mechanism for transmitting the movement of the shaft to the movement of the respective tool part is provided between the shaft and the movable tool parts of different workstations , Since this shaft drives the tool parts of several workstations, the movements of these tool parts are automatically synchronized with each other by the movement of the shaft. This synchronization is mechanical and thus independent of potential errors of electronic synchronization.
  • the arranged in the direction of production of the packaging machine shaft only requires a relatively small space, so that the packaging machine can be built very compact. Furthermore, according to the invention, a tool part which can be moved by means of the shaft can be displaced at a workstation in the production direction of the packaging machine.
  • the transfer mechanism for transmitting the movement of the shaft to the movement of the respective tool part to a toggle linkage and / or a cam mechanism.
  • the transfer mechanism becomes robust and independent of easy wearing parts like a belt.
  • the required for the stroke of the tool parts, comparatively high forces can be transmitted well by a toggle linkage or a cam mechanism.
  • the transfer mechanism has a cam mechanism
  • this preferably comprises a friction-reducing element in order to reduce the load on the transfer mechanism and thus also of the shaft by friction.
  • a friction-reducing element could be provided as a friction-reducing element one or more rolling on a backdrop along wheels.
  • Conceivable It would also be desirable to provide as a friction reducing element on the surface of a component of the cam mechanism a material with a lower coefficient of friction and / or a suitable surface treatment in order to reduce the friction there.
  • the shaft could be driven in 360 ° continuous rotation. This would have the advantage that a transmission between the shaft and the drive of the shaft, for example an electric motor or in particular a servomotor, can be made comparatively simple. However, it may be cheaper in view of the shaft to be effected, alternating lifting movement of the tool parts, when the shaft is driven alternately in different directions of rotation.
  • Workstations of the packaging machine the tool parts are driven by the shaft to a lifting movement, for example, a forming station, a sealing station and / or a cutting or cutting station.
  • the packaging machine may also include a plurality of workstations of any of the aforementioned types.
  • At least two workstations of the packaging machine are arranged at different heights. This would have the advantage that the workstations in the horizontal direction can move closer to each other, so that the packaging machine can be built even more compact. In particular, it would be possible that two workstations are even arranged one above the other, and / or that a packaging material between two workstations is deflected by 180 ° in order to move from a first transport plane to a second transport plane.
  • This frame can stabilize the shaft and prevent the creation of vibrations in the packaging machine, which could otherwise affect the precision of the packaging process.
  • a tool part movable by means of the shaft can be displaced at a workstation in the production direction of the packaging machine.
  • This allows the packaging process to be easily adapted to changing conditions, such as the use of other packaging materials or other packaging forms. It is particularly favorable when the shift or adjustment without an intervention on the shaft and / or transfer mechanism is feasible.
  • the cam mechanism engages a horizontal backdrop, and that the lifting movement of the actuated tool part is independent of the actual point of application of the cam mechanism on the backdrop.
  • two transfer mechanisms for transmitting the movement of the shaft to the movement of a tool part of the workstation are provided. This is particularly useful, for example, in a cross-cutting device for a packaging film.
  • the use of two transfer mechanisms for lifting the cutting tool of the cross-cutting device on both sides of the packaging film web in this case prevents tilting of the cutting tool and thus ensures a secure, continuous cut through the packaging film web.
  • transfer mechanisms are provided, these are preferably offset symmetrically with respect to the central shaft, each laterally opposite the shaft, i.
  • the transfer mechanisms are located on different sides of the shaft and at the same distance from the shaft. This ensures that the drive forces from the shaft are transmitted evenly to both transfer mechanisms.
  • FIG. 1 shows a first embodiment of a packaging machine 1 according to the invention in a perspective view. For clarity, only the most important components of the invention of the packaging machine 1 are shown.
  • the packaging machine 1 is a thermoforming packaging machine. It has (at least) three workstations, namely a forming station 2, an evacuating and sealing station 3 and a separating station 4. All of these workstations 2, 3, 4 act on a packaging material 5, which is a plastic film web. At a standstill of the packaging material 5 during the intermittent operation of the packaging machine 1, the mold 6 is moved perpendicular to the plane of the web-shaped packaging material 5 in order to deep draw in the packaging material 5 packaging trays.
  • the sealing station 3 has a sealing tool upper part 7 and a sealing tool lower part 8.
  • a closed sealing chamber can be formed between the two tool parts 7, 8, in which the packaging recess previously filled with a product sealed in the packaging material 5 with a cover film, not shown, and thus can be closed. It is conceivable to evacuate the sealing chamber between the two tool parts 7, 8 and thus the packaging tray before sealing and / or to treat it with a replacement gas. After sealing, the sealing tool top 7 and the sealing tool bottom 8 are again removed from each other to expose the packaging tray and allow further transport of the packaging material 5.
  • the separating station 4 is a cross-cutting device in which a separating knife 9 is provided as a tool part. This cutting knife 9 can be moved in the vertical direction, ie perpendicular to the plane of the packaging material 5, in order to sever the web-shaped packaging material 5.
  • the packaging machine 1 defines a production direction R, in which the packaging material 5 is transported through at least some of the work stations, in the present embodiment by the sealing station 3 and the separation station 4.
  • the packaging material 5 is transported against this direction of production R before it to a virtual, horizontal axis 10 is deflected and brought in this way from a first transport plane 11 in a second transport plane 12.
  • the packaging machine 1 has a frame 13 which is arranged horizontally between the two transport planes 11, 12.
  • the frame 13 comprises a plurality of lateral longitudinal struts 14, which are aligned in the production direction R of the packaging machine 1, and a plurality of transverse struts 15, which connect the longitudinal struts 14 with each other.
  • the frame 13 has two longitudinal struts 14 oriented parallel to one another and located at the same height. These longitudinal struts 14 extend at least over the length of a workstation 2, 3, 4 in the production direction R.
  • the packaging machine shown is associated with a first pair of longitudinal struts 14 of the forming station 2.
  • a second pair of longitudinal struts 14 extends both below the sealing station 3, and below the separation station 4. It would be conceivable that the longitudinal struts 14 through the entire length and thus constitute a single frame 13 for all workstations 2, 3, 4.
  • the shaft 16 Centrally located between the longitudinal struts 14 is also aligned in the direction of production R of the packaging machine 1 shaft 16.
  • the shaft 16 is connected to a drive, such as an electric motor, preferably a servo motor.
  • the shaft 16 can be driven by the drive alternately in different directions of rotation.
  • a transfer mechanism 17 is fixedly connected to the shaft 16.
  • the transfer mechanism 17 may be a toggle linkage and / or a cam mechanism. This transfer mechanism 17 ensures that the rotational movement of the shaft 16 is transferred to the movement of the movable tool part of the respective work station 2, 3, 4, ie, to the lifting movement of the mold part 6,
  • the shaft 16 acts as a "king wave", which controls the movement of several movable tool parts 6, 7, 8, 9 different workstations 2, 3, 4.
  • transfer mechanisms 17 are provided on both sides of the shaft to cause the movement of the separating knife 9.
  • the transfer mechanisms 17 are arranged symmetrically with respect to the shaft 16, ie they each have the same distance to the shaft 16 lying between them.
  • the shaft 16 is mounted in a plurality of transverse struts 15 of the frame 13.
  • plain bearings or ball bearings 18 may be provided.
  • the shaft 16 may be arranged centrally within the packaging machine 1.
  • FIG. 1 It can be seen that the forming station 2 is below the plane of the frame 13, while the sealing station 3 and the cutting station 4 are above the plane of the frame 13.
  • FIG. 1 shows the packaging machine in a state in which the tools 6, 7, 8, 9 of the respective workstations 2, 3, 4 are opened to allow further transport of the web-shaped packaging material 5.
  • FIG. 2 whereas, the same packaging machine 1 is in a state in which the tool parts 6, 7, 8, 9 of the work stations 2, 3, 4 are closed to act on the sheet-shaped packaging material 5.
  • the mold 6 of the forming station 2 is pressed down against the packaging material 5 to deep draw the packaging material 5 to packaging trays. The movement of the mold 6 will be described later with reference to FIG FIG. 3 be explained in more detail.
  • this transfer mechanism 17 comprises a roller 17 a, which is aligned about an axis parallel to the production direction R axis is rotatable, and which is fixed on both sides by fixedly attached to the shaft 16 lever 17b. Rotation of the shaft 16 causes the levers 17b also to rotate about the shaft 16 while lifting the roller 17a. This roller 17a rolls on the serving as a backdrop underside of the sealing tool lower part 8.
  • the transfer mechanism 17 is thus formed in this case as a cam mechanism.
  • the separating knife 9 of the separation station 4 is further raised by the rotational movement of the shaft 16 is transmitted by means of the two laterally arranged transfer mechanisms 17 to a lifting movement of the separating knife 9.
  • the separating knife 9 cooperates with a counter knife 9a in order to sever the sheet-like packaging material 5 between the cutting edges of the two knives 9, 9a.
  • FIG. 3 shows an enlarged view of the forming station 2 of the packaging rail 1, in which some covers are removed to make the interior of the forming station 2 and in particular the transfer mechanism 17 more visible.
  • two levers 17b are fastened here on the shaft 16 so that they participate in the rotational movement of the shaft 16.
  • a roller 17a which is rotatable about an axis oriented parallel to the production direction R of the packaging machine 1.
  • the roller 17 a is completely enclosed by two upright drive plates 17 c, which are mounted on the mold 6.
  • half-open position of the forming station 2 performs a rotation of the shaft 16 in the direction A to a lowering of the roller 17 a.
  • the roller 17a presses against a formed on the surface of the mold 6 gate 17d to press the mold 6 against the packaging film web 5 down.
  • an opposite rotation of the shaft 16 ie a rotation opposite to the direction A, leads to a lifting of the roller 17a.
  • the Mit supportivebleche 17c the mold 6 is also raised.
  • An adjustment element 19 secures the transfer mechanism 17 in the longitudinal direction along the longitudinal struts 14.
  • the transfer mechanism 17 can be displaced along the longitudinal struts 14 in the longitudinal direction, ie in the production direction R.
  • the forming station 2 could be displaced with the forming tool 3 in the longitudinal direction of the packaging machine 1, while the transfer mechanism 17 maintains its position on the shaft 16.
  • FIG. 4 shows a schematic side view of a second embodiment of a packaging machine 20 according to the invention also in this embodiment, it is a thermoforming packaging machine 20, in which two mold cavities 21 are deep-drawn into a web-shaped packaging material 5 in a forming station. After filling with a product 22, the packaging troughs 21 reach a first sealing station 3a. Here, the filled packaging wells 21 are closed with a lid, which was previously deep-drawn in a second forming station 23 into a, also web-shaped, second packaging material 25 withdrawn from a film roll 24.
  • the already closed packaging troughs 21 enter a second sealing station 3b, in which a second lidding film 27 drawn off from a further film roll 26 is sealed onto the packaging troughs 21.
  • the forming station 2 as in the first embodiment has a mold 6 for deep drawing, the two evacuating and sealing stations 3a, 3b as in the first embodiment, two relative to each other and mutually movable sealing tool parts 7, 8, namely a sealing tool shell 7 and Sealing tool base 8.
  • the separation station 4 has in the second embodiment, a cross-cutting device 4a and 4b and a longitudinal separator 4b. In both separating devices 4a, 4b, a separating knife 9 can be driven to a lifting movement in order to cut through the film web 5.
  • the workstations 2, 3a, 3b, 4a, 4b of the packaging machine 20 are arranged on a common machine frame 28. In this machine frame 28 is located in the direction of production R of the packaging machine 20, a shaft 16. As in the first embodiment, the shaft 16 may be mounted on a frame 13.
  • a transfer mechanism 17 is provided, preferably a toggle linkage or a cam mechanism, for the movement of the shaft 16 in a lifting movement of a tool part 6, 7, 8, 9 of the respective workstation 2, 3a, 3b, 4a, 4b.
  • the mold of the second forming station 23 can by means of a corresponding Transfer mechanism 17 may be driven by the rotational movement of the shaft 16 to a lifting movement.
  • the packaging machine 1, 20 can be modified in many ways.
  • At least one workstation has a transfer mechanism 17, in which the rotational movement of the shaft 16 is converted into a linear movement, for example by a spindle design of the shaft 16 in the workstation and a spindle nut seated on the shaft.
  • the thus linear movable spindle nut can drive a toggle lever system for raising and / or lowering a tool part.
  • Tool parts such as the lower part of the mold, the upper part of the mold, the lower part of the sealing tool or the upper part of the sealing tool, can be exchangeable.
  • the tools can preferably be removed from the packaging machine laterally with respect to the production direction. Since various media connections such as electricity, compressed air, vacuum or cooling water are attached to the tools, they are easily detachable, preferably with a connection block, which can also accommodate different media and realizes the connection from the tool to the machine in the working position. With appropriate sealing systems and a backup of the tool in the working position, the media connection is automatically released when changing a tool and then reconnected.
  • thermoforming packaging machine 1, 20 provides a vertical direction of the production direction R lifting device of a portion of the feed system for the web-shaped packaging material 5 in the region of the forming and / or sealing station 2, 3 before.
  • the lifting movement of the feed system eg a lateral chain guide for a transport chain for transporting the packaging film web 5
  • the lifting movement of the feed system causes, when the forming station 2 is open, a distance of the web-shaped packaging material 5 from the heating plate which holds the web-shaped packaging material 5 for the Mold process heated, is present, so that the web-shaped packaging material is not unnecessary Radiation or contact heat is too much heated.
  • the feed system With the closing operation of the forming station 2, the feed system is moved back into its working position, so that the web-shaped packaging material 5 can be specifically heated and deformed.
  • the feed system is moved back into its working position, so that the web-shaped packaging material 5 can be specifically heated and deformed.
  • the vertical lifting device of the feed system is also conceivable in the area of the sealing station 3, if over the edge of the package, which at the same time also usually represents the sealing plane, protruding products are transported into the sealing station and the sealing tool upper part 7 has no upper-stroke function.
  • the adjustable range of the feed system is separated from the non-adjustable areas and adjustable by means of pneumatic cylinders or servo drives and / or coupled to the movement of a tool lower part.
  • a tensioning element for tensioning the transport chain could give way when adjusting the feed system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Package Closures (AREA)

Description

Die Erfindung bezieht sich auf eine Verpackungsmaschine mit mehreren zueinander im Gleichtakt betreibbaren und eine Produktionsrichtung der Verpackungsmaschine definierenden, z.B. in der Produktionsrichtung hintereinander angeordneten Arbeitsstationen mit jeweils mindestens einem beweglichen Werkzeugteil.The invention relates to a packaging machine with a plurality of mutually operable in common and a direction of production of the packaging machine defining, e.g. in the production direction successively arranged workstations, each with at least one movable tool part.

Bei der Verpackungsmaschine kann es sich um eine Tiefziehverpackungsmaschine handeln. In solchen Verpackungsmaschinen werden vom Verpackungsmaterial nacheinander mehrere Arbeitsstationen durchlaufen, um in zeitlicher Abfolge unterschiedliche Arbeitsschritte am Verpackungsmaterial und/oder an den zu verpackenden Produkten vorzunehmen. Beispielsweise werden dabei in einer Formstation Verpackungsmulden tiefgezogen, oder es werden vorgefertigte Schalen von einem Entstapler entnommen, die Verpackungsmulden oder Schalen werden befüllt, die Verpackungen werden evakuiert und/oder begast, sie werden mit einer Deckelfolie versiegelt oder mit einem Stülpdeckel verschlossen und gegebenenfalls werden die Verpackungen noch vereinzelt, kontrolliert und/oder aussortiert. Diese Arbeitsschritte erfolgen in Arbeitsstationen, die jeweils meistens über mindestens ein bewegliches Werkzeugteil verfügen. Sowohl bei einem intermittierenden Betrieb der Verpackungsmaschine, als auch bei einem kontinuierlichen Betrieb müssen die beweglichen Werkzeugteile der einzelnen Arbeitsstationen zueinander synchronisiert werden, um einen reibungslosen Betrieb der Verpackungsmaschine zu gewährleisten.The packaging machine may be a thermoforming packaging machine. In such packaging machines, several workstations are consecutively run through from the packaging material in order to carry out different work steps in time sequence on the packaging material and / or on the products to be packaged. For example, while packaging trays are deep-drawn in a forming station, or prefabricated trays are removed from a destacker, the packaging trays or trays are filled, the packages are evacuated and / or fumigated, they are sealed with a lidding film or sealed with a slip lid and possibly the Packaging still isolated, checked and / or sorted out. These steps are carried out in workstations, each of which usually has at least one movable tool part. Both in an intermittent operation of the packaging machine, as well as in a continuous operation, the moving tool parts of the individual workstations must be synchronized with each other to ensure a smooth operation of the packaging machine.

Aus der EP 0 515 661 B1 ist eine gattungsgemäße Verpackungsmaschine in Form einer Tiefziehmaschine bekannt. Diese Maschine verfügt über eine Formstation zum Formen von Verpackungsmulden in eine Unterfolie, sowie über eine Füllstation und eine Siegelstation. Dabei ist für jede der Arbeitsstationen eine Mechanik vorgesehen, um die Drehung eines Elektromotors umzusetzen in eine Hubbewegung eines Werkzeugteils der jeweiligen Arbeitsstation, d.h. beispielsweise des Formwerkzeugs der Formstation oder eines Kammerteils der Siegelstation. Damit sich beide Seiten des jeweiligen Werkzeugs parallel zueinander nach oben oder unten bewegen, koppelt ein Riemen die Bewegung mehrerer quer zur Produktionsrichtung der Verpackungsmaschine liegender Wellen, deren Drehbewegung jeweils in eine Hubbewegung des betreffenden Werkzeugteils übersetzt wird. Nachteilig an dieser herkömmlichen Verpackungsmaschine ist jedoch, dass für die unterschiedlichen Arbeitsstationen jeweils einzelne Antriebe verwendet werden müssen. Vor allem ist es schwierig, die Bewegung der Werkzeuge der unterschiedlichen Arbeitsstationen miteinander zu synchronisieren.From the EP 0 515 661 B1 is a generic packaging machine in the form of a thermoforming machine known. This machine has a forming station for forming packaging trays in a lower film, as well as a filling station and a sealing station. In this case, a mechanism is provided for each of the workstations to implement the rotation of an electric motor in a lifting movement of a tool part of the respective workstation, ie, for example, the mold of the forming station or a chamber part of the sealing station. In order for both sides of the respective tool to move up or down parallel to one another, a belt couples the movement of several shafts lying transversely to the direction of production of the packaging machine, the rotational movement of each of which is translated into a lifting movement of the respective tool part. However, a disadvantage of this conventional packaging machine is that for the different workstations each individual drives must be used. Above all, it is difficult to synchronize the movement of the tools of the different workstations with each other.

Aus der CN 2 695 356 Y ist eine Verpackungsmaschine mit mehreren zueinander im Gleichtakt mittels einer gemeinsamen rotatorisch angetriebenen Welle betreibbaren Arbeitsstationen bekannt. Die Bewegung der Werkzeugteile der Arbeitsstationen wird über Transfermechaniken von der Bewegung der Welle übertragen.From the CN 2 695 356 Y is a packaging machine with several mutually operable in common mode by means of a common rotatably driven shaft workstations known. The movement of the tool parts of the workstations is transferred via transfer mechanisms from the movement of the shaft.

Aufgabe der vorliegenden Erfindung ist es, eine Verpackungsmaschine mit konstruktiv möglichst einfachen Mitteln hinsichtlich eines variablen Einsatzes der Maschine zu verbessern.Object of the present invention is to improve a packaging machine with structurally simple means as possible with respect to a variable use of the machine.

Diese Aufgabe wird gelöst durch eine Verpackungsmaschine mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by a packaging machine with the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

Die Erfindung sieht vor, dass die Verpackungsmaschine eine in der Produktionsrichtung der Verpackungsmaschine angeordnete, rotatorisch angetriebene Welle aufweist, und dass zwischen der Welle und den beweglichen Werkzeugteilen unterschiedlicher Arbeitsstationen jeweils mindestens eine Transfermechanik zum Übertragen der Bewegung der Welle auf die Bewegung des jeweiligen Werkzeugteils vorgesehen ist. Da diese Welle die Werkzeugteile mehrerer Arbeitsstationen antreibt, sind die Bewegungen dieser Werkzeugteile durch die Bewegung der Welle automatisch miteinander synchronisiert. Diese Synchronisierung erfolgt mechanisch und ist damit unabhängig von potenziellen Fehlern einer elektronischen Synchronisierung. Die in Produktionsrichtung der Verpackungsmaschine angeordnete Welle benötigt nur einen vergleichsweise kleinen Bauraum, so dass die Verpackungsmaschine sehr kompakt gebaut werden kann. Erfindungsgemäß ist ferner ein mittels der Welle bewegbares Werkzeugteil an einer Arbeitsstation in Produktionsrichtung der Verpackungsmaschine verlagerbar.The invention provides that the packaging machine has a rotatably driven shaft arranged in the production direction of the packaging machine, and that at least one transfer mechanism for transmitting the movement of the shaft to the movement of the respective tool part is provided between the shaft and the movable tool parts of different workstations , Since this shaft drives the tool parts of several workstations, the movements of these tool parts are automatically synchronized with each other by the movement of the shaft. This synchronization is mechanical and thus independent of potential errors of electronic synchronization. The arranged in the direction of production of the packaging machine shaft only requires a relatively small space, so that the packaging machine can be built very compact. Furthermore, according to the invention, a tool part which can be moved by means of the shaft can be displaced at a workstation in the production direction of the packaging machine.

Vorzugsweise weist die Transfermechanik zum Übertragen der Bewegung der Welle auf die Bewegung des jeweiligen Werkzeugteils ein Kniehebelgestänge und/oder eine Nockenmechanik auf. Auf diese Weise wird die Transfermechanik robust und unabhängig von leicht verschleißenden Teilen wie einem Riemen. Zudem können durch ein Kniehebelgestänge oder eine Nockenmechanik die für den Hub der Werkzeugteile erforderlichen, vergleichsweise hohen Kräfte gut übertragen werden.Preferably, the transfer mechanism for transmitting the movement of the shaft to the movement of the respective tool part to a toggle linkage and / or a cam mechanism. In this way, the transfer mechanism becomes robust and independent of easy wearing parts like a belt. In addition, the required for the stroke of the tool parts, comparatively high forces can be transmitted well by a toggle linkage or a cam mechanism.

Wenn die Transfermechanik eine Nockenmechanik aufweist, umfasst diese vorzugsweise ein reibungsminderndes Element, um die Belastung der Transfermechanik und damit auch der Welle durch Reibung zu vermindern. Beispielsweise könnten als reibungsminderndes Element ein oder mehrere an einer Kulisse entlang rollende Räder vorgesehen sein. Denkbar wäre es auch, als reibungsminderndes Element auf der Oberfläche einer Komponente der Nockenmechanik ein Material mit einem geringeren Reibungskoeffizienten und/oder eine geeignete Oberflächenbehandlung vorzusehen, um dort die Reibung zu vermindern.If the transfer mechanism has a cam mechanism, this preferably comprises a friction-reducing element in order to reduce the load on the transfer mechanism and thus also of the shaft by friction. For example, could be provided as a friction-reducing element one or more rolling on a backdrop along wheels. Conceivable It would also be desirable to provide as a friction reducing element on the surface of a component of the cam mechanism a material with a lower coefficient of friction and / or a suitable surface treatment in order to reduce the friction there.

Die Welle könnte in fortlaufender Rotation um 360° angetrieben sein. Dies hätte den Vorteil, dass ein Getriebe zwischen der Welle und dem Antrieb der Welle, beispielsweise einem Elektromotor oder insbesondere einem Servomotor, vergleichsweise einfach gestaltet werden kann. Möglicherweise ist es jedoch im Hinblick auf die von der Welle zu bewirkende, alternierende Hubbewegung der Werkzeugteile günstiger, wenn die Welle alternierend in unterschiedliche Rotationsrichtungen angetrieben ist.The shaft could be driven in 360 ° continuous rotation. This would have the advantage that a transmission between the shaft and the drive of the shaft, for example an electric motor or in particular a servomotor, can be made comparatively simple. However, it may be cheaper in view of the shaft to be effected, alternating lifting movement of the tool parts, when the shaft is driven alternately in different directions of rotation.

Arbeitsstationen der Verpackungsmaschine, deren Werkzeugteile mittels der Welle zu einer Hubbewegung angetrieben werden, können beispielsweise eine Formstation, eine Siegelstation und/oder eine Trenn- oder Schneidstation sein. Die Verpackungsmaschine kann auch mehrere Arbeitsstationen eines der vorstehend genannten Typen aufweisen.Workstations of the packaging machine, the tool parts are driven by the shaft to a lifting movement, for example, a forming station, a sealing station and / or a cutting or cutting station. The packaging machine may also include a plurality of workstations of any of the aforementioned types.

In einer Variante der erfindungsgemäßen Verpackungsmaschine sind mindestens zwei Arbeitsstationen der Verpackungsmaschine in unterschiedlicher Höhe angeordnet. Dies hätte den Vorteil, dass die Arbeitsstationen in horizontaler Richtung dichter aneinander rücken können, so dass die Verpackungsmaschine noch kompakter gebaut werden kann. Insbesondere wäre es möglich, dass zwei Arbeitsstationen sogar übereinander angeordnet sind, und/oder dass ein Verpackungsmaterial zwischen zwei Arbeitsstationen um 180° umgelenkt wird, um von einer ersten Transportebene in eine zweite Transportebene zu gelangen.In a variant of the packaging machine according to the invention at least two workstations of the packaging machine are arranged at different heights. This would have the advantage that the workstations in the horizontal direction can move closer to each other, so that the packaging machine can be built even more compact. In particular, it would be possible that two workstations are even arranged one above the other, and / or that a packaging material between two workstations is deflected by 180 ° in order to move from a first transport plane to a second transport plane.

Zweckmäßig ist es, wenn ein Rahmen zum Lagern der Welle vorgesehen ist. Dieser Rahmen kann die Welle stabilisieren und die Entstehung von Vibrationen in der Verpackungsmaschine verhindern, die ansonsten die Präzision des Verpackungsprozesses beeinträchtigen könnten.It is useful if a frame is provided for supporting the shaft. This frame can stabilize the shaft and prevent the creation of vibrations in the packaging machine, which could otherwise affect the precision of the packaging process.

Bei der Erfindung ist ein mittels der Welle bewegbares Werkzeugteil an einer Arbeitsstation in Produktionsrichtung der Verpackungsmaschine verlagerbar. Dadurch kann der Verpackungsprozess leicht an sich ändernde Bedingungen angepasst werden, beispielsweise zur Verwendung anderer Verpackungsmaterialien oder zur Herstellung anderer Verpackungsformen. Besonders günstig ist es dabei, wenn die Verlagerung oder Justage ohne einen Eingriff an der Welle und/oder Transfermechanik durchführbar ist. Beispielsweise wäre es denkbar, dass die Nockenmechanik an einer horizontalen Kulisse angreift, und dass die Hubbewegung des betätigten Werkzeugteils unabhängig vom tatsächlichen Angriffspunkt der Nockenmechanik an der Kulisse ist.In the invention, a tool part movable by means of the shaft can be displaced at a workstation in the production direction of the packaging machine. This allows the packaging process to be easily adapted to changing conditions, such as the use of other packaging materials or other packaging forms. It is particularly favorable when the shift or adjustment without an intervention on the shaft and / or transfer mechanism is feasible. For example, it would be conceivable that the cam mechanism engages a horizontal backdrop, and that the lifting movement of the actuated tool part is independent of the actual point of application of the cam mechanism on the backdrop.

Je nach Typ der Arbeitsstation, deren Werkzeugteil betätigt werden soll, kann es günstig sein, wenn zwei Transfermechaniken zum Übertragen der Bewegung der Welle auf die Bewegung eines Werkzeugteils der Arbeitsstation vorgesehen sind. Besonders zweckmäßig ist dies beispielsweise bei einer Querschneideeinrichtung für eine Verpackungsfolie. Die Verwendung zweier Transfermechaniken zum Anheben des Schneidwerkzeugs der Quertrenneinrichtung auf beiden Seiten der Verpackungsfolienbahn verhindert in diesem Fall ein Verkanten des Schneidwerkzeugs und sorgt somit für einen sicheren, durchgehenden Schnitt durch die Verpackungsfolienbahn.Depending on the type of workstation whose tool part is to be actuated, it can be favorable if two transfer mechanisms for transmitting the movement of the shaft to the movement of a tool part of the workstation are provided. This is particularly useful, for example, in a cross-cutting device for a packaging film. The use of two transfer mechanisms for lifting the cutting tool of the cross-cutting device on both sides of the packaging film web in this case prevents tilting of the cutting tool and thus ensures a secure, continuous cut through the packaging film web.

Wenn zwei Transfermechaniken vorgesehen sind, sind diese vorzugsweise symmetrisch zur zentralen Welle jeweils seitlich gegenüber der Welle versetzt, d.h. die Transfermechaniken befinden sich auf unterschiedlichen Seiten der Welle und jeweils im gleichen Abstand zur Welle. Dadurch wird gewährleistet, dass die Antriebskräfte von der Welle gleichmäßig auf beide Transfermechaniken übertragen werden.If two transfer mechanisms are provided, these are preferably offset symmetrically with respect to the central shaft, each laterally opposite the shaft, i. The transfer mechanisms are located on different sides of the shaft and at the same distance from the shaft. This ensures that the drive forces from the shaft are transmitted evenly to both transfer mechanisms.

Im Folgenden werden zwei vorteilhafte Ausführungsbeispiele der vorliegenden Erfindung anhand einer Zeichnung näher dargestellt. Im Einzelnen zeigen:

Figur 1
eine perspektivische Ansicht eines Ausschnitts eines ersten Ausführungsbeispiels einer erfindungsgemäßen Verpackungsmaschine bei geöffneten Werkzeugen,
Figur 2
eine perspektivische Ansicht der in Figur 1 gezeigten Verpackungsmaschine bei geschlossenen Werkzeugen,
Figur 3
eine vergrößerte Darstellung der Formstation der in den Figuren 1 und 2 gezeigten Verpackungsmaschine und
Figur 4
eine schematische Seitenansicht eines zweiten Ausführungsbeispiels einer erfindungsgemäßen Verpackungsmaschine.
In the following two advantageous embodiments of the present invention will be described with reference to a drawing. In detail show:
FIG. 1
a perspective view of a section of a first embodiment of a packaging machine according to the invention with open tools,
FIG. 2
a perspective view of in FIG. 1 shown packaging machine with closed tools,
FIG. 3
an enlarged view of the forming station in the FIGS. 1 and 2 shown packaging machine and
FIG. 4
a schematic side view of a second embodiment of a packaging machine according to the invention.

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

Figur 1 zeigt ein erstes Ausführungsbeispiel einer erfindungsgemäßen Verpackungsmaschine 1 in einer perspektivischen Ansicht. Der Übersichtlichkeit halber sind nur die für die Erfindung wichtigsten Komponenten der Verpackungsmaschine 1 dargestellt. FIG. 1 shows a first embodiment of a packaging machine 1 according to the invention in a perspective view. For clarity, only the most important components of the invention of the packaging machine 1 are shown.

Bei der Verpackungsmaschine 1 handelt es sich um eine Tiefziehverpackungsmaschine. Sie verfügt über (mindestens) drei Arbeitsstationen, nämlich eine Formstation 2, eine Evakuier-und Siegelstation 3 und eine Trennstation 4. Alle diese Arbeitsstationen 2, 3, 4 wirken auf ein Verpackungsmaterial 5 ein, bei dem es sich um eine Kunststofffolienbahn handelt. Die Formstation 2 verfügt zu diesem Zweck über ein Formwerkzeug 6. Bei einem Stillstand des Verpackungsmaterials 5 während des intermittierenden Betriebs der Verpackungsmaschine 1 wird das Formwerkzeug 6 senkrecht zur Ebene des bahnförmigen Verpackungsmaterials 5 bewegt, um in dem Verpackungsmaterial 5 Verpackungsmulden tiefzuziehen.The packaging machine 1 is a thermoforming packaging machine. It has (at least) three workstations, namely a forming station 2, an evacuating and sealing station 3 and a separating station 4. All of these workstations 2, 3, 4 act on a packaging material 5, which is a plastic film web. At a standstill of the packaging material 5 during the intermittent operation of the packaging machine 1, the mold 6 is moved perpendicular to the plane of the web-shaped packaging material 5 in order to deep draw in the packaging material 5 packaging trays.

Die Siegelstation 3 verfügt über ein Siegelwerkzeugoberteil 7 und ein Siegelwerkzeugunterteil 8. Durch die Bewegung des Siegelwerkzeugoberteils 7 und/oder des Siegelwerkzeugunterteils 8 aufeinander zu kann zwischen den beiden Werkzeugteilen 7, 8 eine geschlossene Siegelkammer gebildet werden, in der die zuvor mit einem Produkt befüllte Verpackungsmulde im Verpackungsmaterial 5 mit einer nicht dargestellten Deckelfolie versiegelt und somit verschlossen werden kann. Denkbar ist es, die Siegelkammer zwischen den beiden Werkzeugteilen 7, 8 und damit die Verpackungsmulde vor dem Versiegeln zu evakuieren und/oder mit einem Austauschgas zu begasen. Nach dem Siegeln werden das Siegelwerkzeugoberteil 7 und das Siegelwerkzeugunterteil 8 wieder voneinander entfernt, um die Verpackungsmulde freizugeben, und den Weitertransport des Verpackungsmaterials 5 zu gestatten.The sealing station 3 has a sealing tool upper part 7 and a sealing tool lower part 8. By the movement of the sealing tool upper part 7 and / or the sealing tool lower part 8 towards each other, a closed sealing chamber can be formed between the two tool parts 7, 8, in which the packaging recess previously filled with a product sealed in the packaging material 5 with a cover film, not shown, and thus can be closed. It is conceivable to evacuate the sealing chamber between the two tool parts 7, 8 and thus the packaging tray before sealing and / or to treat it with a replacement gas. After sealing, the sealing tool top 7 and the sealing tool bottom 8 are again removed from each other to expose the packaging tray and allow further transport of the packaging material 5.

Bei der Trennstation 4 handelt es sich im vorliegenden Ausführungsbeispiel um eine Quertrenneinrichtung, in der als Werkzeugteil ein Trennmesser 9 vorgesehen ist. Dieses Trennmesser 9 kann in vertikaler Richtung, d.h. senkrecht zur Ebene des Verpackungsmaterials 5, bewegt werden, um das bahnförmige Verpackungsmaterial 5 zu durchtrennen.In the present embodiment, the separating station 4 is a cross-cutting device in which a separating knife 9 is provided as a tool part. This cutting knife 9 can be moved in the vertical direction, ie perpendicular to the plane of the packaging material 5, in order to sever the web-shaped packaging material 5.

Die Verpackungsmaschine 1 definiert eine Produktionsrichtung R, in der das Verpackungsmaterial 5 durch zumindest einige der Arbeitsstationen transportiert wird, im vorliegenden Ausführungsbeispiel durch die Siegelstation 3 und die Trennstation 4. In der Formstation 2 wird das Verpackungsmaterial 5 entgegen dieser Produktionsrichtung R transportiert, bevor es um eine virtuelle, horizontale Achse 10 umgelenkt und auf diese Weise von einer ersten Transportebene 11 in eine zweite Transportebene 12 gebracht wird.The packaging machine 1 defines a production direction R, in which the packaging material 5 is transported through at least some of the work stations, in the present embodiment by the sealing station 3 and the separation station 4. In the forming station 2, the packaging material 5 is transported against this direction of production R before it to a virtual, horizontal axis 10 is deflected and brought in this way from a first transport plane 11 in a second transport plane 12.

Die Verpackungsmaschine 1 verfügt über einen Rahmen 13, der horizontal zwischen den beiden Transportebenen 11, 12 angeordnet ist. Der Rahmen 13 umfasst mehrere seitliche Längsstreben 14, die in Produktionsrichtung R der Verpackungsmaschine 1 ausgerichtet sind, sowie mehrere Querstreben 15, die die Längsstreben 14 miteinander verbinden. An jeder Arbeitsstation 2, 3, 4 der Verpackungsmaschine 1 weist der Rahmen 13 zwei parallel zueinander ausgerichtete und in gleicher Höhe befindliche Längsstreben 14 auf. Diese Längsstreben 14 erstrecken sich mindestens über die Länge einer Arbeitsstation 2, 3, 4 in der Produktionsrichtung R. Bei der in Figur 1 gezeigten Verpackungsmaschine ist ein erstes Paar von Längsstreben 14 der Formstation 2 zugeordnet. Ein zweites Paar von Längsstreben 14 erstreckt sich sowohl unterhalb der Siegelstation 3, als auch unterhalb der Trennstation 4. Denkbar wäre es, dass die Längsstreben 14 über die gesamte Länge durchlaufen und so einen einheitlichen Rahmen 13 für alle Arbeitsstationen 2, 3, 4 darstellen.The packaging machine 1 has a frame 13 which is arranged horizontally between the two transport planes 11, 12. The frame 13 comprises a plurality of lateral longitudinal struts 14, which are aligned in the production direction R of the packaging machine 1, and a plurality of transverse struts 15, which connect the longitudinal struts 14 with each other. At each work station 2, 3, 4 of the packaging machine 1, the frame 13 has two longitudinal struts 14 oriented parallel to one another and located at the same height. These longitudinal struts 14 extend at least over the length of a workstation 2, 3, 4 in the production direction R. In the in FIG. 1 The packaging machine shown is associated with a first pair of longitudinal struts 14 of the forming station 2. A second pair of longitudinal struts 14 extends both below the sealing station 3, and below the separation station 4. It would be conceivable that the longitudinal struts 14 through the entire length and thus constitute a single frame 13 for all workstations 2, 3, 4.

Mittig zwischen den Längsstreben 14 befindet sich eine ebenfalls in Produktionsrichtung R der Verpackungsmaschine 1 ausgerichtete Welle 16. Die Welle 16 ist mit einem Antrieb verbunden, beispielsweise einem Elektromotor, vorzugsweise einem Servomotor. Im vorliegenden Ausführungsbeispiel kann die Welle 16 durch den Antrieb alternierend in unterschiedliche Rotationsrichtungen angetrieben werden.Centrally located between the longitudinal struts 14 is also aligned in the direction of production R of the packaging machine 1 shaft 16. The shaft 16 is connected to a drive, such as an electric motor, preferably a servo motor. In the present embodiment, the shaft 16 can be driven by the drive alternately in different directions of rotation.

Im Bereich jeder Arbeitsstation 2, 3, 4 ist eine Transfermechanik 17 fest mit der Welle 16 verbunden. Bei der Transfermechanik 17 kann es sich um ein Kniehebelgestänge und/oder um eine Nockenmechanik handeln. Diese Transfermechanik 17 sorgt dafür, die Rotationsbewegung der Welle 16 auf die Bewegung des beweglichen Werkzeugteils der jeweiligen Arbeitsstation 2, 3, 4 zu übertragen, d.h. auf die Hubbewegung des Formwerkzeugteils 6, des Siegelwerkzeugoberteils 7 und/oder des Siegelwerkzeugunterteils 8 sowie auf die Bewegung des Trennmessers 9. Die Welle 16 wirkt dabei als "Königswelle", die die Bewegung mehrerer beweglicher Werkzeugteile 6, 7, 8, 9 unterschiedlicher Arbeitsstationen 2, 3, 4 ansteuert. Durch diese gemeinsame Ansteuerung der Hubbewegung über die Welle 16 sind die Bewegungen der Werkzeugteile 6, 7, 8, 9 miteinander auf mechanische Weise synchronisiert.In the area of each workstation 2, 3, 4, a transfer mechanism 17 is fixedly connected to the shaft 16. The transfer mechanism 17 may be a toggle linkage and / or a cam mechanism. This transfer mechanism 17 ensures that the rotational movement of the shaft 16 is transferred to the movement of the movable tool part of the respective work station 2, 3, 4, ie, to the lifting movement of the mold part 6, The shaft 16 acts as a "king wave", which controls the movement of several movable tool parts 6, 7, 8, 9 different workstations 2, 3, 4. By this common control of the lifting movement via the shaft 16, the movements of the tool parts 6, 7, 8, 9 synchronized with each other in a mechanical manner.

An der Trennstation 4 sind zu beiden Seiten der Welle 16 Transfermechaniken 17 vorgesehen, um die Bewegung des Trennmessers 9 zu bewirken. Die Transfermechaniken 17 sind symmetrisch zur Welle 16 angeordnet, haben also jeweils den gleichen Abstand zur zwischen ihnen liegenden Welle 16.At the separation station 4 16 transfer mechanisms 17 are provided on both sides of the shaft to cause the movement of the separating knife 9. The transfer mechanisms 17 are arranged symmetrically with respect to the shaft 16, ie they each have the same distance to the shaft 16 lying between them.

Die Welle 16 ist in mehreren Querstreben 15 des Rahmens 13 gelagert. Zur Lagerung können Gleitlager oder Kugellager 18 vorgesehen sein. Insbesondere kann die Welle 16 mittig innerhalb der Verpackungsmaschine 1 angeordnet sein.The shaft 16 is mounted in a plurality of transverse struts 15 of the frame 13. For storage plain bearings or ball bearings 18 may be provided. In particular, the shaft 16 may be arranged centrally within the packaging machine 1.

In Figur 1 ist zu erkennen, dass die Formstation 2 unterhalb der Ebene des Rahmens 13 liegt, während sich die Siegelstation 3 und die Schneidstation 4 oberhalb der Ebene des Rahmens 13 befinden. Durch diese Anordnung und durch den gekrümmten Weg des Verpackungsmaterials 5 wird eine sehr kompakte Bauform der Verpackungsmaschine 1 erreicht. Dies hat den Vorteil, dass die zentrale Welle 16 vergleichsweise kurz sein kann, so dass Torsionskräfte innerhalb der Welle 16 minimiert werden.In FIG. 1 It can be seen that the forming station 2 is below the plane of the frame 13, while the sealing station 3 and the cutting station 4 are above the plane of the frame 13. By this arrangement and by the curved path of the packaging material 5, a very compact design of the packaging machine 1 is achieved. This has the advantage that the central shaft 16 can be comparatively short, so that torsional forces within the shaft 16 are minimized.

Figur 1 zeigt die Verpackungsmaschine in einem Zustand, in dem die Werkzeuge 6, 7, 8, 9 der jeweiligen Arbeitsstationen 2, 3, 4 geöffnet sind, um einen Weitertransport des bahnförmigen Verpackungsmaterials 5 zu erlauben. Figur 2 hingegen zeigt die gleiche Verpackungsmaschine 1 in einem Zustand, in dem die Werkzeugteile 6, 7, 8, 9 der Arbeitsstationen 2, 3, 4 geschlossen sind, um auf das bahnförmige Verpackungsmaterial 5 einzuwirken. So ist das Formwerkzeug 6 der Formstation 2 nach unten gegen das Verpackungsmaterial 5 gepresst, um das Verpackungsmaterial 5 zu Verpackungsmulden tiefzuziehen. Die Bewegung des Formwerkzeugs 6 wird später anhand von Figur 3 ausführlicher erläutert werden. FIG. 1 shows the packaging machine in a state in which the tools 6, 7, 8, 9 of the respective workstations 2, 3, 4 are opened to allow further transport of the web-shaped packaging material 5. FIG. 2 whereas, the same packaging machine 1 is in a state in which the tool parts 6, 7, 8, 9 of the work stations 2, 3, 4 are closed to act on the sheet-shaped packaging material 5. Thus, the mold 6 of the forming station 2 is pressed down against the packaging material 5 to deep draw the packaging material 5 to packaging trays. The movement of the mold 6 will be described later with reference to FIG FIG. 3 be explained in more detail.

In der Siegelstation 3 ist das Siegelwerkzeugunterteil 8 angehoben worden, um gemeinsam mit dem Siegelwerkzeugoberteil 7 angeschlossene Siegelkammer zu bilden. Diese Hubbewegung des Siegelwerkzeugunterteils 8 wird erreicht durch eine Drehung der Welle 16, und durch eine Übertragung der Drehbewegung 16 auf eine Hubbewegung des Siegelwerkzeugunterteils 8 mittels der Transfermechanik 17. Im dargestellten Ausführungsbeispiel umfasst diese Transfermechanik 17 eine Rolle 17a, die um eine parallel zur Produktionsrichtung R ausgerichtete Achse drehbar ist, und die auf beiden Seiten durch fest an der Welle 16 befestigte Hebel 17b befestigt ist. Eine Drehung der Welle 16 bewirkt, dass sich die Hebel 17b ebenfalls um die Welle 16 drehen und dabei die Rolle 17a anheben. Diese Rolle 17a rollt auf der als Kulisse dienenden Unterseite des Siegelwerkzeugunterteils 8. Die Transfermechanik 17 ist in diesem Fall also als Nockenmechanik ausgebildet.In the sealing station 3, the sealing tool lower part 8 has been raised in order to form a sealing chamber connected together with the sealing tool upper part 7. This lifting movement of the sealing tool lower part 8 is achieved by a rotation of the shaft 16, and by a transmission of the rotary movement 16 to a lifting movement of the sealing tool lower part 8 by means of the transfer mechanism 17. In the illustrated embodiment, this transfer mechanism 17 comprises a roller 17 a, which is aligned about an axis parallel to the production direction R axis is rotatable, and which is fixed on both sides by fixedly attached to the shaft 16 lever 17b. Rotation of the shaft 16 causes the levers 17b also to rotate about the shaft 16 while lifting the roller 17a. This roller 17a rolls on the serving as a backdrop underside of the sealing tool lower part 8. The transfer mechanism 17 is thus formed in this case as a cam mechanism.

Bei einer Drehung der Welle 16 wird ferner das Trennmesser 9 der Trennstation 4 angehoben, indem die Drehbewegung der Welle 16 mittels der beiden seitlich angeordneten Transfermechaniken 17 auf eine Hubbewegung des Trennmessers 9 übertragen wird. Das Trennmesser 9 arbeitet mit einem Gegenmesser 9a zusammen, um zwischen den Schneidkanten der beiden Messer 9, 9a das bahnförmige Verpackungsmaterial 5 zu durchtrennen.Upon rotation of the shaft 16, the separating knife 9 of the separation station 4 is further raised by the rotational movement of the shaft 16 is transmitted by means of the two laterally arranged transfer mechanisms 17 to a lifting movement of the separating knife 9. The separating knife 9 cooperates with a counter knife 9a in order to sever the sheet-like packaging material 5 between the cutting edges of the two knives 9, 9a.

Figur 3 zeigt eine vergrößerte Ansicht der Formstation 2 der Verpackungsschiene 1, bei der einige Abdeckungen entfernt sind, um das Innere der Formstation 2 und insbesondere die Transfermechanik 17 besser sichtbar zu machen. Ebenso wie an der Siegelstation 3 sind auch hier zwei Hebel 17b auf der Welle 16 befestigt, so dass sie an der Drehbewegung der Welle 16 teilnehmen. Zwischen den von der Welle 16 entfernten Enden der beiden Hebel 17b befindet sich eine Rolle 17a, die um eine parallel zur Produktionsrichtung R der Verpackungsmaschine 1 ausgerichtete Achse drehbar ist. Die Rolle 17a ist vollständig durch zwei aufrecht stehende Mitnehmerbleche 17c eingefasst, die auf dem Formwerkzeug 6 befestigt sind. FIG. 3 shows an enlarged view of the forming station 2 of the packaging rail 1, in which some covers are removed to make the interior of the forming station 2 and in particular the transfer mechanism 17 more visible. As well as at the sealing station 3, two levers 17b are fastened here on the shaft 16 so that they participate in the rotational movement of the shaft 16. Between the ends of the two levers 17b remote from the shaft 16 there is a roller 17a, which is rotatable about an axis oriented parallel to the production direction R of the packaging machine 1. The roller 17 a is completely enclosed by two upright drive plates 17 c, which are mounted on the mold 6.

Ausgehend von der in Figur 3 gezeigten, halbgeöffneten Stellung der Formstation 2 führt eine Drehung der Welle 16 in Richtung A zu einem Absenken der Rolle 17a. Dabei drückt die Rolle 17a gegen eine auf der Oberfläche des Formwerkzeugs 6 ausgebildete Kulisse 17d, um das Formwerkzeug 6 gegen die Verpackungsfolienbahn 5 nach unten zu drücken. Nach dem Tiefziehen der Verpackungsmulden führt eine entgegengesetzte Drehung der Welle 16, d.h. eine Drehung entgegen der Richtung A, zu einem Anheben der Rolle 17a. Durch die Mitnehmerbleche 17c wird das Formwerkzeug 6 ebenfalls angehoben. Ein Justageelement 19 sichert die Transfermechanik 17 in Längsrichtung entlang der Längsstreben 14. Sobald dieses Justageelement 19 gelöst oder entsichert wurde, kann die Transfermechanik 17 in Längsrichtung, d.h. in Produktionsrichtung R, entlang der Längsstreben 14 verschoben werden. Alternativ könnte die Formstation 2 mit dem Formwerkzeug 3 in Längsrichtung der Verpackungsmaschine 1 verschoben werden, während die Transfermechanik 17 ihre Position auf der Welle 16 beibehält.Starting from the in FIG. 3 shown, half-open position of the forming station 2 performs a rotation of the shaft 16 in the direction A to a lowering of the roller 17 a. In this case, the roller 17a presses against a formed on the surface of the mold 6 gate 17d to press the mold 6 against the packaging film web 5 down. After the thermoforming of the packaging troughs, an opposite rotation of the shaft 16, ie a rotation opposite to the direction A, leads to a lifting of the roller 17a. By the Mitnehmerbleche 17c, the mold 6 is also raised. An adjustment element 19 secures the transfer mechanism 17 in the longitudinal direction along the longitudinal struts 14. As soon as this adjustment element 19 has been released or released, the transfer mechanism 17 can be displaced along the longitudinal struts 14 in the longitudinal direction, ie in the production direction R. Alternatively, the forming station 2 could be displaced with the forming tool 3 in the longitudinal direction of the packaging machine 1, while the transfer mechanism 17 maintains its position on the shaft 16.

Figur 4 zeigt in schematischer Seitenansicht ein zweites Ausführungsbeispiel einer erfindungsgemäßen Verpackungsmaschine 20. Auch bei diesem Ausführungsbeispiel handelt es sich um eine Tiefziehverpackungsmaschine 20, bei der in einer Formstation 2 Verpackungsmulden 21 in ein bahnförmiges Verpackungsmaterial 5 tiefgezogen werden. Nach dem Befüllen mit einem Produkt 22 gelangen die Verpackungsmulden 21 in eine erste Siegelstation 3a. Hier werden die befüllten Verpackungsmulden 21 mit einem Deckel verschlossen, der zuvor in einer zweiten Formstation 23 in ein von einer Folienrolle 24 abgezogenes, ebenfalls bahnförmiges, zweites Verpackungsmaterial 25 tiefgezogen wurde. FIG. 4 shows a schematic side view of a second embodiment of a packaging machine 20 according to the invention also in this embodiment, it is a thermoforming packaging machine 20, in which two mold cavities 21 are deep-drawn into a web-shaped packaging material 5 in a forming station. After filling with a product 22, the packaging troughs 21 reach a first sealing station 3a. Here, the filled packaging wells 21 are closed with a lid, which was previously deep-drawn in a second forming station 23 into a, also web-shaped, second packaging material 25 withdrawn from a film roll 24.

Beim Weitertransport gelangen die bereits verschlossenen Verpackungsmulden 21 in eine zweite Siegelstation 3b, in der eine von einer weiteren Folienrolle 26 abgezogene, zweite Deckelfolie 27 auf die Verpackungsmulden 21 aufgesiegelt wird. Während die Formstation 2 wie im ersten Ausführungsbeispiel über ein Formwerkzeug 6 zum Tiefziehen verfügt, weisen die beiden Evakuier- und Siegelstationen 3a, 3b wie im ersten Ausführungsbeispiel zwei relativ aufeinander zu und voneinander fort bewegliche Siegelwerkzeugteile 7, 8 auf, nämlich ein Siegelwerkzeugoberteil 7 und ein Siegelwerkzeugunterteil 8.Upon further transport, the already closed packaging troughs 21 enter a second sealing station 3b, in which a second lidding film 27 drawn off from a further film roll 26 is sealed onto the packaging troughs 21. While the forming station 2 as in the first embodiment has a mold 6 for deep drawing, the two evacuating and sealing stations 3a, 3b as in the first embodiment, two relative to each other and mutually movable sealing tool parts 7, 8, namely a sealing tool shell 7 and Sealing tool base 8.

Die Trennstation 4 weist im zweiten Ausführungsbeispiel eine Quertrenneinrichtung 4a und 4b und eine Längstrenneinrichtung 4b auf. In beiden Trenneinrichtungen 4a, 4b kann ein Trennmesser 9 zu einer Hubbewegung angetrieben sein, um die Folienbahn 5 zu durchtrennen. Die Arbeitsstationen 2, 3a, 3b, 4a, 4b der Verpackungsmaschine 20 sind auf einem gemeinsamen Maschinengestell 28 angeordnet. In diesem Maschinengestell 28 befindet sich in Produktionsrichtung R der Verpackungsmaschine 20 eine Welle 16. Wie im ersten Ausführungsbeispiel kann die Welle 16 an einem Rahmen 13 gelagert sein. An jeder Arbeitsstation 2, 3a, 3b, 4a, 4b ist eine Transfermechanik 17 vorgesehen, vorzugsweise ein Kniehebelgestänge oder eine Nockenmechanik, um die Bewegung der Welle 16 in eine Hubbewegung eines Werkzeugteils 6, 7, 8, 9 der jeweiligen Arbeitsstation 2, 3a, 3b, 4a, 4b zu übertragen. Auch das Formwerkzeug der zweiten Formstation 23 kann mittels einer entsprechenden Transfermechanik 17 durch die Rotationsbewegung der Welle 16 zu einer Hubbewegung angetrieben sein.The separation station 4 has in the second embodiment, a cross-cutting device 4a and 4b and a longitudinal separator 4b. In both separating devices 4a, 4b, a separating knife 9 can be driven to a lifting movement in order to cut through the film web 5. The workstations 2, 3a, 3b, 4a, 4b of the packaging machine 20 are arranged on a common machine frame 28. In this machine frame 28 is located in the direction of production R of the packaging machine 20, a shaft 16. As in the first embodiment, the shaft 16 may be mounted on a frame 13. At each workstation 2, 3a, 3b, 4a, 4b, a transfer mechanism 17 is provided, preferably a toggle linkage or a cam mechanism, for the movement of the shaft 16 in a lifting movement of a tool part 6, 7, 8, 9 of the respective workstation 2, 3a, 3b, 4a, 4b. Also, the mold of the second forming station 23 can by means of a corresponding Transfer mechanism 17 may be driven by the rotational movement of the shaft 16 to a lifting movement.

Ausgehend von den dargestellten Ausführungsbeispielen kann die erfindungsgemäße Verpackungsmaschine 1, 20 in vielfacher Hinsicht abgewandelt werden. Insbesondere wäre es denkbar, weitere Arbeitsstationen vorzusehen und/oder weitere Werkzeugteile der vorhandenen Arbeitsstationen mittels der gemeinsamen Welle 16 anzutreiben.Starting from the illustrated embodiments, the packaging machine 1, 20 according to the invention can be modified in many ways. In particular, it would be conceivable to provide further workstations and / or to drive further tool parts of the existing workstations by means of the common shaft 16.

In einer weiteren Variante ist es auch denkbar, dass mindestens eine Arbeitsstation eine Transfermechanik 17 aufweist, bei der die Rotationsbewegung der Welle 16 in eine Linearbewegung umgewandelt wird, beispielsweise durch eine Spindelausführung der Welle 16 im Bereich der Arbeitsstation und einer auf der Welle sitzende Spindelmutter. Die somit lineare bewegbare Spindelmutter kann ein Kniehebelsystem zum Anheben und/oder Absenken eines Werkzeugteils antreiben.In another variant, it is also conceivable that at least one workstation has a transfer mechanism 17, in which the rotational movement of the shaft 16 is converted into a linear movement, for example by a spindle design of the shaft 16 in the workstation and a spindle nut seated on the shaft. The thus linear movable spindle nut can drive a toggle lever system for raising and / or lowering a tool part.

Werkzeugteile, wie Formwerkzeugunterteil, Formwerkzeugoberteil, Siegelwerkzeugunterteil oder Siegelwerkzeugoberteil, können wechselbar ausgeführt sein. Dabei können die Werkzeuge vorzugsweise seitlich gegenüber der Produktionsrichtung aus der Verpackungsmaschine heraus entnommen werden. Da sich verschiedene Medienverbindungen wie Strom, Druckluft, Vakuum oder Kühlwasser an den Werkzeugen angebracht sind, werden diese leicht lösbar ausgeführt, vorzugsweise mit einem Anschlussblock, der auch unterschiedliche Medien aufnehmen kann und der die Verbindung vom Werkzeug zur Maschine in der Arbeitsposition realisiert. Mit entsprechenden Dichtsystemen und einer Sicherung des Werkzeuges in der Arbeitsposition wird die Medienverbindung automatisch beim Wechsel eines Werkzeuges gelöst und anschließend wieder verbunden.Tool parts, such as the lower part of the mold, the upper part of the mold, the lower part of the sealing tool or the upper part of the sealing tool, can be exchangeable. In this case, the tools can preferably be removed from the packaging machine laterally with respect to the production direction. Since various media connections such as electricity, compressed air, vacuum or cooling water are attached to the tools, they are easily detachable, preferably with a connection block, which can also accommodate different media and realizes the connection from the tool to the machine in the working position. With appropriate sealing systems and a backup of the tool in the working position, the media connection is automatically released when changing a tool and then reconnected.

Eine weitere Ausführung der Tiefziehverpackungsmaschine 1, 20 sieht eine zur Produktionsrichtung R vertikale Hubeinrichtung eines Teils des Vorschubsystems für das bahnförmige Verpackungsmaterial 5 im Bereich der Form- und/oder Siegelstation 2, 3 vor. Die Hubbewegung des Vorschubsystems (z. B. einer seitlichen Kettenführung für eine Transportkette zum Transportieren der Verpackungsfolienbahn 5) im Bereich der Formstation 2 bewirkt, dass bei geöffneter Formstation 2 ein Abstand des bahnförmigen Verpackungsmaterials 5 gegenüber der Heizplatte, die das bahnförmige Verpackungsmaterial 5 für den Formprozess erwärmt, vorhanden ist, damit das bahnförmige Verpackungsmaterial nicht unnötig durch Strahlungs- oder Kontaktwärme zu sehr erwärmt wird. Mit dem Schließvorgang der Formstation 2 wird das Vorschubsystem wieder in seine Arbeitsposition zurückbewegt, damit das bahnförmige Verpackungsmaterial 5 gezielt erwärmt und verformt werden kann. Somit kann auf eine Oberhubfunktion des Formwerkzeugoberteils verzichtet werden und der Platzbedarf in diesem Bereich reduziert werden.Another embodiment of the thermoforming packaging machine 1, 20 provides a vertical direction of the production direction R lifting device of a portion of the feed system for the web-shaped packaging material 5 in the region of the forming and / or sealing station 2, 3 before. The lifting movement of the feed system (eg a lateral chain guide for a transport chain for transporting the packaging film web 5) in the region of the forming station 2 causes, when the forming station 2 is open, a distance of the web-shaped packaging material 5 from the heating plate which holds the web-shaped packaging material 5 for the Mold process heated, is present, so that the web-shaped packaging material is not unnecessary Radiation or contact heat is too much heated. With the closing operation of the forming station 2, the feed system is moved back into its working position, so that the web-shaped packaging material 5 can be specifically heated and deformed. Thus, it is possible to dispense with an upper lift function of the upper part of the mold and to reduce the space requirement in this area.

Die vertikale Hubeinrichtung des Vorschubsystems ist auch im Bereich der Siegelstation 3 denkbar, falls über den Packungsrand, der gleichzeitig auch meist die Siegelebene darstellt, überstehende Produkte in die Siegelstation transportiert werden und das Siegelwerkzeugoberteil 7 keine Oberhubfunktion besitzt.The vertical lifting device of the feed system is also conceivable in the area of the sealing station 3, if over the edge of the package, which at the same time also usually represents the sealing plane, protruding products are transported into the sealing station and the sealing tool upper part 7 has no upper-stroke function.

Vorzugsweise ist der verstellbare Bereich des Vorschubsystems von den nicht verstellbaren Bereichen getrennt und mittels Pneumatikzylinder oder Servoantrieben verstellbar und/oder an die Bewegung eines Werkzeugunterteils gekoppelt. Ein Spannelement zum Spannen der Transportkette könnte beim Verstellen des Vorschubsystems nachgeben.Preferably, the adjustable range of the feed system is separated from the non-adjustable areas and adjustable by means of pneumatic cylinders or servo drives and / or coupled to the movement of a tool lower part. A tensioning element for tensioning the transport chain could give way when adjusting the feed system.

Claims (9)

  1. A packaging machine (1, 20) comprising a plurality of work stations (2, 3, 4) which are operable in synchronism with one another and which define a production direction (R) of the packaging machine (1, 20), each of said work stations (2, 3, 4) including at least one movable tool member (6, 7, 8, 9), wherein the packaging machine (1, 20) is provided with a rotationally driven shaft (16) arranged in the production direction (R) of said packaging machine (1, 20), and wherein the shaft (16) and each of the movable tool members (6, 7, 8, 9) of various work stations (2, 3, 4) have provided between them at least one transfer mechanism (17) for converting the movement of the shaft (16) into the movement of the respective tool member (6, 7, 8, 9), characterized in that a tool member (6, 7, 8, 9) on a work station (2, 3, 4) is adapted to be displaced in the production direction (R) of the packaging machine (1, 20), said tool member (6, 7, 8, 9) being movable by means of the shaft (16).
  2. A packaging machine according to claim 1, characterized in that the transfer mechanism (17) comprises an arrangement of toggle levers and/or a cam mechanism.
  3. A packaging machine according to claim 2, characterized in that the cam mechanism is a wheel (17a) rolling preferably along a cam profile (17d).
  4. A packaging machine according to one of the preceding claims, characterized in that the shaft (16) is driven alternately in both directions of rotation.
  5. A packaging machine according to one of the preceding claims, characterized in that, by means of the shaft (16), a lifting movement of tool members (6, 7, 8, 9) of a forming station (2), a sealing station (3) and/or a separating station (4) can be driven.
  6. A packaging machine according to one of the preceding claims, characterized in that at least two work stations (2, 3, 4) of the packaging machine (1, 20) are arranged on different levels.
  7. A packaging machine according to one of the preceding claims, characterized in that a frame (13) is provided for supporting the shaft (16).
  8. A packaging machine according to one of the preceding claims, characterized in that a work station (4) has provided thereon two transfer mechanisms (17) for converting the movement of the shaft (16) into the movement of a tool member (9).
  9. A packaging machine according to claim 8, characterized in that the two transfer mechanisms (17) are, symmetrically to the shaft (16), laterally displaced relative to said shaft (16).
EP10007915.1A 2010-07-29 2010-07-29 Packaging machine with multiple work stations Active EP2412637B1 (en)

Priority Applications (4)

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ES10007915T ES2411957T3 (en) 2010-07-29 2010-07-29 Packaging machine with several work stations
EP10007915.1A EP2412637B1 (en) 2010-07-29 2010-07-29 Packaging machine with multiple work stations
CN201110216919.0A CN102424150B (en) 2010-07-29 2011-07-29 Packaging machine comprising a plurality of work stations
US13/193,923 US8720169B2 (en) 2010-07-29 2011-07-29 Packaging machine comprising a plurality of work stations

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EP10007915.1A EP2412637B1 (en) 2010-07-29 2010-07-29 Packaging machine with multiple work stations

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EP2412637B1 true EP2412637B1 (en) 2013-05-01

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CN102424150A (en) 2012-04-25
EP2412637A1 (en) 2012-02-01
ES2411957T3 (en) 2013-07-09
CN102424150B (en) 2014-07-09
US20120023865A1 (en) 2012-02-02
US8720169B2 (en) 2014-05-13

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