EP2384981B1 - Station de scellage pour une machine d'emballage - Google Patents

Station de scellage pour une machine d'emballage Download PDF

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Publication number
EP2384981B1
EP2384981B1 EP11003668.8A EP11003668A EP2384981B1 EP 2384981 B1 EP2384981 B1 EP 2384981B1 EP 11003668 A EP11003668 A EP 11003668A EP 2384981 B1 EP2384981 B1 EP 2384981B1
Authority
EP
European Patent Office
Prior art keywords
pump
sealing
sealing station
packaging machine
source
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
EP11003668.8A
Other languages
German (de)
English (en)
Other versions
EP2384981A1 (fr
Inventor
Elmar Ehrmann
Herbert Kirmse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
Original Assignee
Multivac Sepp Haggenmueller GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Multivac Sepp Haggenmueller GmbH and Co KG filed Critical Multivac Sepp Haggenmueller GmbH and Co KG
Publication of EP2384981A1 publication Critical patent/EP2384981A1/fr
Application granted granted Critical
Publication of EP2384981B1 publication Critical patent/EP2384981B1/fr
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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
    • 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
    • B65B31/025—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 specially adapted for rigid or semi-rigid containers
    • B65B31/028—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 specially adapted for rigid or semi-rigid containers closed by a lid sealed to the upper rim of the container, e.g. tray-like container

Definitions

  • the present invention relates to a sealing station for a packaging machine according to the preamble of claim 1.
  • a packaging machine with a sealing station is for example from the DE 10 2006 018 327 A1 the packaging machine is a tray sealing machine there ("tray sealer").
  • a sealing film is applied to the upwardly open, product-filled trays. This sealing film closes and seals the trays.
  • a corresponding sealing station is also used in thermoforming packaging machines, or in chamber machines, such as those from the DE 39 16 170 C2 are known.
  • an already preformed lid can also be sealed onto the tray or the packaging tray.
  • the vacuum allows evacuating the packages in the sealing station to extend the shelf life of the products.
  • the package may also be flushed or filled with a replacement gas.
  • the sealing itself usually takes place under the action of pressure and temperature on the sealing film.
  • a positive pressure source is provided, which provides the compressed air for pressing the sealing tool to the packaging.
  • a packaging machine In other areas of a packaging machine, compressed air and negative pressure are used.
  • Such a claw pump is for example in the DE 19629174 A1 described.
  • a rotary vane vacuum pump describes the DE 23 48 441 A1 ,
  • Object of the present invention is to improve a sealing station for a packaging machine with structurally simple means as possible in terms of reliable, energy-efficient operation.
  • a single drive is provided for both the vacuum and the overpressure source.
  • the sealing station is very compact, and compared to the use of multiple drives decreases susceptibility.
  • the sealing station according to the invention is also particularly efficient and low-maintenance in that a pump used as a vacuum and / or overpressure source is a rotary vane pump or a screw pump.
  • the intake of the vacuum pump is connected upstream of a three-way valve. This allows the pump to both evacuate the vacuum tank and to selectively draw in ambient air.
  • suction port of the pump via a first input of the three-way valve is in communication with the ambient air, easier and more efficient pressure can be generated, as if the suction port of the pump would be constantly connected to the vacuum tank.
  • a second input of the three-way valve is in communication with the chamber of the sealing station or with a vacuum container.
  • a negative pressure can be generated or the pressure in the vacuum tank can be further lowered.
  • the operation of the sealing station is particularly energy and cost, by a single pump generates both the vacuum for evacuating the packaging, as well as the compressed air for pressing the sealing tool.
  • the reason for this is that the pump is better utilized because it avoids dead or downtime. In addition, it prevents the pump from working over closed valves for an excessively long time.
  • all pumps can still be driven by a common drive, for example by means of a common output shaft of an engine.
  • a pump is a rotary vane pump, it preferably has three rotary vents. This ensures a particularly quiet operation of the pump.
  • a control for controlling the operation of the pump and / or the three-way valve is provided. This controller adjusts the operation of the pump ideally to the duty cycle of the sealing station or the entire packaging machine.
  • the invention also relates to a packaging machine with a sealing station of the type described above.
  • FIG. 1 shows a schematic view of a packaging machine 1 according to the invention in the form of a thermoforming packaging machine.
  • This thermoforming packaging machine 1 has a forming station 2, a sealing station 3, a cross-cutting device 4 and a longitudinal cutting device 5, which are arranged in this working order in a working direction R on a machine frame 6.
  • a feed roller 7 On the input side is located on the machine frame 6, a feed roller 7, from which a first web-shaped material 8 is withdrawn.
  • a material reservoir 9 is provided, from which a second web-shaped material 10 is withdrawn as a cover film.
  • a discharge device 13 in the form of a conveyor belt is provided on the packaging machine, are transported with the finished, isolated packaging.
  • the packaging machine 1 a feed device, not shown, which engages the first web-shaped material 8 and transported in a main working cycle in cycles in the direction of R.
  • the feed device can be realized for example by laterally arranged transport chains.
  • the forming station 2 is formed as a thermoforming station in which containers 14 are formed by deep drawing in the first sheet material 8.
  • the forming station 2 may be designed such that in the direction perpendicular to the working direction R a plurality of containers are formed side by side.
  • an insertion path 15 is provided, in which the containers 14 formed in the first web-shaped material 8 are filled with product 16.
  • the sealing station 3 has a closable chamber 17 in which the atmosphere in the container 14 can be replaced prior to sealing, for example, by gas purging with a replacement gas or with an exchange gas mixture.
  • the cross-cutting device 4 is formed as a punch, which cuts through the first web-shaped material 8 and the second web-shaped material 10 in a direction transverse to the working direction R between adjacent containers 14.
  • the cross-cutting device 4 operates such that the first web-shaped material 8 is not divided over the entire width, but at least in an edge region is not severed. This allows a controlled onward transport by the feed device.
  • the longitudinal cutting device 5 is formed in the illustrated embodiment as a knife assembly, with the first sheet material 8 and the second sheet material 10 between adjacent containers 14 and at the lateral edge of the first web-shaped material 8 are severed, so that behind the longitudinal cutting device 5 isolated packaging.
  • the packaging machine 1 also has a controller 18. It has the task of controlling and monitoring the processes taking place in the packaging machine 1.
  • a display device 19 with operating elements 20 serves to visualize or influence the process sequences in the packaging machine 1 for or by an operator.
  • the first web-shaped material 8 is withdrawn from the feed roller 7 and transported by the feed device into the forming station 2.
  • containers 14 are formed by deep drawing in the first sheet-like material 8.
  • the containers 14 are transported along with the surrounding area of the first web-like material 8 in a main working cycle to the insertion path 15, in which they are filled with product 16.
  • the filled containers 14 are transported along with the surrounding area of the first sheet material 8 in the main working cycle by the feed device in the sealing station 3.
  • the second web-shaped material 10 is transported as a lid film after a Ansiegelvorgang to the first web-shaped material 8 with the advancing movement of the first web-shaped material 8.
  • the second web-shaped material 10 is withdrawn from the material storage 9.
  • sealed packages 21 are formed.
  • FIG. 2 shows a schematic view of a vertical section through a sealing tool 22 of the sealing station 3.
  • the sealing tool 22 has a sealing tool bottom part 23 and a sealing tool upper part 24.
  • a trough or recess 25 is provided in the sealing tool lower part 23, a trough or recess 25 is provided in the sealing tool lower part 23, a container 14 to be closed can be arranged, while the edge 26 of the sealing tool lower part 23 carries the edge of the container 14.
  • sealing plate 28 Inside the sealing tool upper part 24 is a sealing plate 28 with downwardly projecting sealing edges 29. Inside the sealing plate 28 is optionally still a product protection plate (not shown). The product protection plate is cooler than the sealing plate 28 and prevents excessive heating of the product 16 in the container 14 during sealing.
  • the sealing plate 28 is sealed relative to the outer wall of the sealing tool upper part 24.
  • a pressure chamber 31 between the sealing plate 28 and the outer wall of the sealing tool upper part 28 an overpressure can be applied to press the sealing plate 28 down under pressure.
  • a heating device is provided (not shown) in order to heat the sealing plate 28, in particular its sealing edges 29, to the sealing temperature.
  • the sealing station 3 has in the embodiment according to FIG. 2 via a designed as a rotary vane pump or screw pump 33, which generates both vacuum for evacuating the packaging 14, as well as overpressure for providing compressed air for pressing the sealing tool 28.
  • the (only) pump 33 is driven by a drive M, for example an electric motor.
  • An intake opening 34 of the pump 33 is preceded by a three-way valve 35.
  • a first input 36 of the three-way valve is in communication with the ambient air of the sealing station 3.
  • a second input 37 of the three-way valve 35 communicates with a vacuum line 38, which is connected to the chamber 25 of the sealing station 3.
  • the pressure side of the pump 33 is in communication with a pressure line 41 which is connected to the sealing pressure chamber 31 of the sealing tool 22.
  • a pressure line 41 which is connected to the sealing pressure chamber 31 of the sealing tool 22.
  • a compressed air reservoir 42 for storing an overpressure.
  • check valves 43, 44 are arranged in the compressed air line.
  • a second three-way valve 45 is provided in the compressed air line 41, which can completely replace the shut-off valve 43.
  • a first input 46 of the three-way valve 45 communicates with the positive pressure side of the pump 33 in connection.
  • a second input 47 leads to the overpressure accumulator 42, while a third input 48 communicates with the ambient air of the sealing station 3.
  • the pump 33 can generate a negative pressure without having to work against the overpressure in the compressed-air accumulator 42. If the pump 33-, however, to increase the pressure in the compressed air reservoir 42, the second three-way valve 45 is between the the first input and the second input 47 is opened, while the third input 48 is closed.
  • Both the pump 33, and the three-way valves 35, 45 and the check valves 40, 43, 44 are connected to the controller 18 via control lines (not shown). By means of suitable control signals, the controller 18 adjusts the operating sequence 33 and the valves 35, 40, 43, 44 to the operating sequence on the sealing station 3.
  • the shut-off valve 40 is opened and subsequently the three-way valve 35 between the vacuum container 39 and the pump 33 is released at the same time.
  • a vacuum is generated in the sealing chamber 25 to evacuate the package 14.
  • shut-off valve 44 After sealing, the shut-off valve 44 is closed and the sealing pressure chamber 31 is vented to raise the sealing tool 28 again.
  • the shut-off valve 40 is closed. After the seal chamber 25 has opened by moving the seal tool bottom 23 and the seal tool top 24 in opposite directions, the sealed container 14 can be removed.
  • the pump 33 can evacuate the vacuum container 39 and / or fill the pressure accumulator 42.
  • FIG. 3 shows a schematic view of a second embodiment of the in FIG. 2 III designated region of the sealing station 3.
  • This second embodiment differs from the first embodiment in that instead of a single pump two Pumps 33a, 33b are provided. These two pumps are connected to the output shaft 49 of a common drive M, so that both pumps 33a, 33b are operated by the same drive M.
  • a clutch or a switching means may be provided to selectively connect the respective pump 33a, 33b to the drive M.
  • the two pumps 33a, 33b can be optimized for different pressure ranges.
  • the first pump 33a may be optimized for a low pressure range to act as a vacuum source.
  • the second pump 33b can be optimized for a higher pressure range than the first pump 33a so as to serve as an overpressure source.
  • the two pumps 33a, 33b are arranged in series one behind the other between the two three-way valves 35, 45.
  • a portion 41 a of the compressed air line 41 connects the two pumps 33 a, 33 b with each other.
  • the two pumps 33a, 33b may be rotary vane pumps or screw pumps. Both pumps 33a, 33b may be of the same type or of different types.
  • a pump 33a for generating vacuum and a second pump 33b are operated for generating compressed air at the same time, it is advantageous to omit or open the portion 41 a of the compressed air line 41, thus on the pump 33a for the vacuum generation on the discharge side and on the pump 33b for the compressed air generation on the suction side in each case the ambient air is available. This provides optimized flow conditions on both pumps 33a, 33b.

Claims (8)

  1. Station de scellement (3) pour une machine d'emballage (1), comprenant :
    - un outil de scellement (22) pour sceller des emballages (14),
    - une source de sous-pression (33) pour évacuer des emballages (14) dans la station de scellement, et
    - une source de surpression (33) pour procurer de l'air comprimé afin de presser l'outil de scellement contre un emballage (14),
    caractérisée
    en ce qu'un seul entraînement (M) est pourvu aussi bien pour la source de sous-pression que pour la source de surpression, dans laquelle la source de sous-pression et/ou la source de surpression est une pompe (33) de type pompe à palettes ou pompe à vis, et
    en ce qu'une vanne trois voies (35) est installée en amont de l'orifice d'aspiration (34) de la pompe (33, 33a),
    dans laquelle une première entrée (36) de la vanne trois voies (35) est en communication avec l'air ambiant, et dans laquelle
    une deuxième entrée (37) de la vanne trois voies (35) est en communication avec la chambre (25) de la station de scellement (3) ou avec un réservoir en sous-pression (39).
  2. Station de scellement selon la revendication 1, caractérisée en ce qu'une seule pompe (33) est pourvue aussi bien comme source de sous-pression que comme source de surpression.
  3. Station de scellement selon la revendication 1, caractérisée en ce qu'une première pompe (33a) est pourvue comme source de sous-pression et une deuxième pompe (33b) comme source de surpression.
  4. Station de scellement selon la revendication 3, caractérisée en ce que toutes les pompes présentes (33a, 33b) peuvent être entraînées par un axe commun de l'entraînement (M).
  5. Station de scellement selon l'une des revendications précédentes, caractérisée en ce qu'une pompe de type pompe à palettes (33) comporte trois palettes rotatives.
  6. Station de scellement selon l'une des revendications précédentes, caractérisée en ce qu'un réservoir d'air comprimé (42) et/ou un réservoir en sous-pression (39) sont pourvus.
  7. Station de scellement selon l'une des revendications précédentes, caractérisée en ce qu'une commande (18) est pourvue pour commander le fonctionnement des pompes (33, 33a, 33b) et/ou de la vanne trois voies (35).
  8. Machine d'emballage (1) avec une station de scellement (3) selon l'une des revendications précédentes.
EP11003668.8A 2010-05-06 2011-05-04 Station de scellage pour une machine d'emballage Active EP2384981B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010019635.5A DE102010019635B4 (de) 2010-05-06 2010-05-06 Siegelstation für eine Verpackungsmaschine

Publications (2)

Publication Number Publication Date
EP2384981A1 EP2384981A1 (fr) 2011-11-09
EP2384981B1 true EP2384981B1 (fr) 2013-05-01

Family

ID=44117111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11003668.8A Active EP2384981B1 (fr) 2010-05-06 2011-05-04 Station de scellage pour une machine d'emballage

Country Status (5)

Country Link
US (1) US9169033B2 (fr)
EP (1) EP2384981B1 (fr)
CN (1) CN102233959B (fr)
DE (1) DE102010019635B4 (fr)
ES (1) ES2413809T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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DE102012024725A1 (de) 2012-12-18 2014-06-18 Multivac Sepp Haggenmüller Gmbh & Co. Kg Tiefziehverpackungsmaschine und Verfahren
BR112015026866B1 (pt) * 2013-04-24 2021-03-16 Gea Food Solutions Germany Gmbh máquina de embalagem
CN104354902A (zh) * 2014-10-22 2015-02-18 合肥市春晖机械制造有限公司 一种单槽式真空封口包装机
WO2016207059A1 (fr) * 2015-06-24 2016-12-29 Gea Food Solutions Germany Gmbh Machine d'emballage comprenant un dispositif d'étranglement à moteur
US10370133B2 (en) * 2015-08-17 2019-08-06 Sf Investments, Inc. Vacuum packing monitoring and control system
US11293551B2 (en) * 2018-09-30 2022-04-05 ColdQuanta, Inc. Break-seal system with breakable-membrane bridging rings
DE102020130654A1 (de) * 2020-11-19 2022-05-19 Multivac Sepp Haggenmüller Se & Co. Kg Verpackungsvorrichtung
DE102022210044A1 (de) 2022-09-23 2024-03-28 Robert Bosch Gesellschaft mit beschränkter Haftung Druckversorgungseinheit und Verfahren zur Bereitstellung eines ersten Ziel-Druckniveaus und eines zweiten Ziel-Druckniveaus, mikrofluidisches Analysesystem

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Also Published As

Publication number Publication date
US20110271650A1 (en) 2011-11-10
DE102010019635A1 (de) 2011-11-10
CN102233959A (zh) 2011-11-09
DE102010019635B4 (de) 2014-04-03
EP2384981A1 (fr) 2011-11-09
US9169033B2 (en) 2015-10-27
CN102233959B (zh) 2013-05-01
ES2413809T3 (es) 2013-07-17

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