EP4273056A1 - Dispositif de levage avec verrouillage et procédé - Google Patents

Dispositif de levage avec verrouillage et procédé Download PDF

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Publication number
EP4273056A1
EP4273056A1 EP23161983.4A EP23161983A EP4273056A1 EP 4273056 A1 EP4273056 A1 EP 4273056A1 EP 23161983 A EP23161983 A EP 23161983A EP 4273056 A1 EP4273056 A1 EP 4273056A1
Authority
EP
European Patent Office
Prior art keywords
lifting device
lifting
tool
hoist
locking mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23161983.4A
Other languages
German (de)
English (en)
Inventor
Maximilian Hetz
Philipp ADERMANN
Dominik Patz
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
Publication of EP4273056A1 publication Critical patent/EP4273056A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B47/00—Apparatus 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B47/00—Apparatus 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
    • B65B47/04—Apparatus 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 mechanical pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B65/00—Details peculiar to packaging machines and not otherwise provided for; Arrangements of such details

Definitions

  • the present invention relates to a lifting mechanism for opening and closing a tool of a packaging machine according to claim 1.
  • the invention further relates to a method for opening and closing a tool of a packaging machine according to claim 9.
  • Hoists are conventionally used on intermittently operating packaging machines, for example on thermoforming packaging machines, in order to open and close work stations designed thereon, for example a forming station, a sealing station and/or a cutting station, in cycles in order to carry out processing processes on supplied packaging materials therein.
  • DE 42 16 207 C1 discloses a packaging machine with a cutting device that can be opened and closed by means of a piston-cylinder device. So that the forces occurring during the cutting process can be better absorbed, the piston-cylinder device can be decoupled from the cutting process by means of a wedge that can be inserted into its piston. The cutting forces built up during the cutting process therefore do not affect the piston stroke.
  • the object of the invention is to provide a lifting gear that can be used in particular for lifting heavy tool assemblies and in particular for generating large lifting forces. Furthermore, it is the object of the invention to provide a corresponding method.
  • the invention relates to a lifting mechanism for opening and closing a tool of a packaging machine, the lifting mechanism having at least one first lifting device and at least one second lifting device, which can be actuated one after the other in order to move the lifting mechanism from an open position to a closed position, the first Lifting device is decoupled from a load pickup caused by the second lifting device for closing the tool.
  • the lifting gear has at least one adjustable locking mechanism for decoupling the first lifting device from a force flow caused by the second lifting device. This locking mechanism makes it possible to at least temporarily block the first lifting device, while a maximum closing force of the tool is built up by means of the second lifting device.
  • the locking mechanism used in the invention ensures that the first lifting device, so to speak, as a lifting device for closing the tool, only lifts the weight of a lower and / or upper tool part formed thereon, but in order to apply the power stroke required for a work process, the second lifting device is decoupled from the first Lifting device works as a power lifting device, i.e. the first lifting device remains unloaded due to the use of the locking mechanism when carrying out the power stroke. This enables gentle operation of the lifting gear, in particular the first lifting device, even if heavy tool components are to be moved by means of the lifting gear and/or high tool closing forces are required.
  • the locking mechanism can be clamped by at least one component formed on the first lifting device for the force decoupling of the first lifting device from the force flow caused by the second lifting device. It is conceivable that the locking mechanism has at least one linearly or rotatably adjustable blocking element, which can be coupled or brought into engagement with the first lifting device in such a way that a force generated by the second lifting device can be shielded from the first lifting device.
  • the locking mechanism has an adjustment drive that can be controlled separately by the first and second lifting devices.
  • Such an adjustment drive could be present, for example, as a pneumatically operated linear drive or as a pneumatically operated swivel drive.
  • the lifting gear has at least one base plate which is carried by a pull rod and is adjustable along the pull rod by means of the first lifting device.
  • the tie rod that can be used to carry the base plate can be attached to a machine frame of the packaging machine by means of a holder, for example by means of a curved holding plate or a rail.
  • the base plate is configured to carry a lower tool part, for example a sealing goggle.
  • This lower tool part could be configured as a tray holder for holding a predetermined format of prefabricated packaging lower parts.
  • the second lifting device is arranged between the base plate and the lower tool part, wherein the lower tool part can be lifted from the base plate by means of the second lifting device in order to build up the power stroke, i.e. a preload between the lower tool part and an upper tool part positioned above it.
  • the lifting mechanism includes at least one height-adjustable stop for stopping a lifting movement of a tool holder used to carry the upper tool part.
  • the first lifting device can be relieved of the weight of the upper tool part as soon as the tool holder provided for this purpose is seated on the stop.
  • an upper stroke movement of the upper tool part can stop and a load change can take place.
  • This load change means that from the point at which the upper stroke movement of the upper tool part stops, the lower tool part, which is positioned on the base plate, is raised, causing the tool to close as a whole.
  • the tool parts can thus be lowered and raised one after the other, with the weight forces caused by the tool parts each acting individually on the first lifting device.
  • the stop is mounted in a height-adjustable manner, for example screwed onto the machine frame as a bolt with an external thread. This allows the use of different tool parts.
  • the first lifting device has at least one lifting cylinder with an extendable piston, which can be controlled both for adjusting the upper tool part and for adjusting the lower tool part. It is conceivable that several such lifting cylinders, for example four lifting cylinder modules, are provided on the circumference of the lifting mechanism.
  • the second lifting device has at least one inflatable membrane for lifting the lower tool part.
  • This inflatable membrane can be positioned between the lower tool part and the base plate positioned underneath in order to lift the lower tool part on the base plate following the force decoupling of the first lifting device by the locking mechanism in order to carry out the power stroke for a predetermined work process.
  • the base plate is fixed by the locking mechanism so that no force can be transferred from it to the lifting cylinder or cylinders.
  • the invention further relates to a packaging machine, which is designed in particular in the form of a deep-drawing packaging machine or in the form of a tray sealing machine, with at least one lifting mechanism of the type described above being mounted on it.
  • a corresponding lifting mechanism could be present at a forming station, a sealing station and/or a cutting station of the thermoforming packaging machine in order to move the tools used thereon.
  • the hoist can be used at a sealing station of the tray sealing machine.
  • the invention further relates to a method for opening and closing a tool of a packaging machine by means of a lifting gear designed thereon.
  • a first lifting device and a second lifting device are actuated one after the other, the first lifting device being decoupled from a load pickup caused by the second lifting device for closing the tool.
  • a locking mechanism is adjusted between a base plate of the lifting mechanism, which can be adjusted by means of the first lifting device, and a cylinder plate of a lifting cylinder formed on the first lifting device. This allows the first lifting device to be blocked in such a way that it is isolated from a subsequent lifting movement carried out by means of the second lifting device to generate a power stroke, i.e. it is not loaded by forces built up by means of the power stroke.
  • the locking mechanism is clamped between the base plate and the cylinder plate for force decoupling of the first lifting device from a force flow caused by the second lifting device.
  • a blocking element formed on the locking mechanism could be brought into engagement with the first lifting device in such a way that the base plate is thereby fixed relative to the cylinder plate. It would be conceivable for the blocking element to be linearly adjusted or pivoted between the base plate and the cylinder plate.
  • Fig. 1 shows a packaging machine 100A configured as an intermittent thermoforming packaging machine 20.
  • This thermoforming packaging machine 20 has a forming station 21, a sealing station 22, a cross-cutting device 23 and a longitudinal cutting device 24, which are arranged in this order in a production direction R on a machine frame 25.
  • the thermoforming packaging machine 20 has a transport chain 28, which grips the bottom film 27 and transports it further in the production direction R per main work cycle.
  • the forming station 21 is designed as a deep-drawing station in which troughs M are formed into the lower film 27 by deep-drawing, for example using compressed air and/or vacuum.
  • the forming station 21 can be designed in such a way that several troughs M are formed next to one another in the direction perpendicular to the production direction R.
  • a filling section or an insertion area 29 is provided, along which the packaging troughs M are filled with products.
  • the packaging troughs M can be filled manually by an operator or mechanically by a picker.
  • the sealing station 22 has a hermetically sealable chamber 22a in which the atmosphere in the packaging troughs M can be evacuated, for example, and/or replaced by gas flushing with a replacement gas or with a gas mixture before sealing with an upper film 31 released from a film receptacle 30.
  • the cross-cutting device 23 can be designed as a punch that cuts through the lower film 27 and the upper film 31 in a direction transverse to the production direction R between adjacent packaging troughs M.
  • the cross-cutting device 23 works in such a way that the bottom film 27 is not cut across the entire width, but is not cut through at least in an edge area. This enables controlled further transport through the transport chain 28.
  • the longitudinal cutting device 24 can be designed as a knife arrangement with which the lower film 27 and the upper film 31 are cut between adjacent packaging troughs M and on the lateral edge of the lower film 27 in the production direction R, so that isolated packages V are present behind the longitudinal cutting device 24.
  • the thermoforming packaging machine also has a control device 32. Its task is to control and monitor the processes taking place in the thermoforming packaging machine 20.
  • a display device 33 is used to visualize or influence the process sequences in the thermoforming packaging machine 20 for or by an operator.
  • Fig. 2 shows another packaging machine 100B, which is present as a tray sealing machine 40.
  • a tray sealing machine 40 is also called a tray sealer in specialist circles.
  • the tray sealing machine 40 has a feed belt 41 on which prefabricated tray parts 42 are transported. Furthermore, the tray sealing machine 40 has a gripper device 43. By means of the gripper device 43, the shell parts 42 provided on the feed belt 41 can be picked up and handed over to a sealing station 44 of the tray sealing machine 40 for a sealing process. Shell parts 42 accommodated therein sealed with a top film 45 guided through the sealing station 44. After the sealing process, the sealed shell parts 42 are picked up by the gripper device 43 and transferred to a discharge belt 46 of the shell sealing machine 40.
  • Fig. 3 shows a hoist 100 and a tool 50 that can be adjusted with it in an open position S1.
  • the hoist 100 has a base plate 1, which is in the open position S1 by means of a pull rod 2 and a holding plate 3 on a machine frame, for example the machine frame 25 Fig. 1 , supported.
  • a cylinder piston 7a of a lifting cylinder 7 is attached to the base plate 1, which is in the open position S1 according to Fig. 3 is in the retracted state.
  • the lifting cylinder 7 lifts a tool holder 10, on which an upper tool part 11, for example an upper sealing tool part, is mounted.
  • a stop 12 and a locking mechanism 13 shown Their function will be discussed further in connection with the Fig. 4 - 7 described.
  • the lifting cylinder 7 is first removed from the in Fig. 3 shown setting. This will be in Fig. 4 shown.
  • the lifting cylinder 7 is supported on the base plate 1.
  • the cylinder plate 8 and the pull rod 9 are lowered in the direction F1, whereby the tool holder 10 comes into contact with the stop 12.
  • the stop 12 can be adjusted so that the upper tool part 11 stops when it sits flush on the top film 31, 45.
  • Fig. 5 the upper tool part 11 and the lower tool part 6 are moved towards each other at most by means of the lifting cylinder 7.
  • the locking mechanism 13 in particular a blocking element 13a formed thereon, is positioned between the base plate 1 and the cylinder plate 8 by means of a linear or pivoting movement. This will be in Fig. 6 shown.
  • At least one membrane 5 contained in the lifting plate 4 is pressurized, so that this clamps the base plate 1 onto the locking mechanism 13.
  • the lifting plate 4 is supported in the direction F3 by the base plate 1, whereby the lifting mechanism 100 is in a closed position S2 Fig. 6 achieved in order to carry out a work process, for example a sealing process.
  • the flow of force takes place between the membrane 5, the lifting plate 4, the lower tool part 6, the upper tool part 11, the tool holder 10, the tie rods 9, the cylinder plate 8, the locking mechanism 13 and the base plate 1.
  • the lifting cylinder 7 does not generate any part of the closing force of the lifting mechanism 100 that builds up and remains decoupled from the power stroke, so to speak.
  • the weight of the hoist 100 rests on the stop 12.
  • the hoist 100 offers the advantage that the power stroke and the displacement stroke take place decoupled from one another.
  • the result of this is that the lifting cylinders 7 only have to move the weight forces and the power stroke only has to cover a very short distance, whereby optimal utilization of the membrane 5 can be achieved.
  • This makes it possible to place a relatively low load on the lifting cylinders 7 in terms of force, which means that they can be designed to be smaller and can therefore also be controlled with low energy consumption. Overall, this leads to a cost-effective design and operation of the lifting cylinders 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
EP23161983.4A 2022-03-29 2023-03-15 Dispositif de levage avec verrouillage et procédé Pending EP4273056A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022107346.7A DE102022107346A1 (de) 2022-03-29 2022-03-29 Hubwerk mit Verriegelung sowie Verfahren

Publications (1)

Publication Number Publication Date
EP4273056A1 true EP4273056A1 (fr) 2023-11-08

Family

ID=85703788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23161983.4A Pending EP4273056A1 (fr) 2022-03-29 2023-03-15 Dispositif de levage avec verrouillage et procédé

Country Status (4)

Country Link
US (1) US20230312153A1 (fr)
EP (1) EP4273056A1 (fr)
CN (1) CN220032384U (fr)
DE (1) DE102022107346A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4216207C1 (fr) 1992-05-15 1993-08-19 Multivac Sepp Haggenmueller Kg, 8941 Wolfertschwenden, De
DE4216210A1 (de) * 1992-05-15 1993-11-18 Multivac Haggenmueller Kg Arbeitsstation mit einem Oberteil und einem relativ dazu bewegbaren Unterteil
EP2218575A1 (fr) * 2009-02-11 2010-08-18 MULTIVAC Sepp Haggenmüller GmbH & Co KG Machine d'emballage dotée d'une station de travail comportant un dispositif de levage électrique équipé d'une course grosse et fine
DE102009052816A1 (de) * 2009-11-13 2011-05-19 Extraplast Maschinen Gmbh Vorrichtung zum Schließen und Öffnen des Werkzeugs einer Maschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4216207C1 (fr) 1992-05-15 1993-08-19 Multivac Sepp Haggenmueller Kg, 8941 Wolfertschwenden, De
DE4216210A1 (de) * 1992-05-15 1993-11-18 Multivac Haggenmueller Kg Arbeitsstation mit einem Oberteil und einem relativ dazu bewegbaren Unterteil
EP2218575A1 (fr) * 2009-02-11 2010-08-18 MULTIVAC Sepp Haggenmüller GmbH & Co KG Machine d'emballage dotée d'une station de travail comportant un dispositif de levage électrique équipé d'une course grosse et fine
DE102009052816A1 (de) * 2009-11-13 2011-05-19 Extraplast Maschinen Gmbh Vorrichtung zum Schließen und Öffnen des Werkzeugs einer Maschine

Also Published As

Publication number Publication date
CN220032384U (zh) 2023-11-17
DE102022107346A1 (de) 2023-10-05
US20230312153A1 (en) 2023-10-05

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