EP2251264B1 - Machine d'emballage et procédé de fermeture de récipients dotés de couvercles - Google Patents

Machine d'emballage et procédé de fermeture de récipients dotés de couvercles Download PDF

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Publication number
EP2251264B1
EP2251264B1 EP10004362.9A EP10004362A EP2251264B1 EP 2251264 B1 EP2251264 B1 EP 2251264B1 EP 10004362 A EP10004362 A EP 10004362A EP 2251264 B1 EP2251264 B1 EP 2251264B1
Authority
EP
European Patent Office
Prior art keywords
lid foil
lid
packaging machine
container
foil
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.)
Not-in-force
Application number
EP10004362.9A
Other languages
German (de)
English (en)
Other versions
EP2251264A1 (fr
Inventor
Elmar Ehrmann
Helmut Sparakowski
Hans-Joachim Boekstegers
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 EP2251264A1 publication Critical patent/EP2251264A1/fr
Application granted granted Critical
Publication of EP2251264B1 publication Critical patent/EP2251264B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B65B47/02—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 with means for heating the material prior to forming
    • 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
    • B65B47/08—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 fluid pressure
    • B65B47/10—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 fluid pressure by vacuum
    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/01—Machines characterised by incorporation of means for making the closures before applying
    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • B65B7/164—Securing by heat-sealing

Definitions

  • the present invention relates to a method according to the preamble of claim 1 and to a packaging machine for carrying out such a method.
  • Packaging machines for closing already preformed and individualized containers are known in the form of so-called tray sealing machines ("tray sealers"), for example from US Pat DE 10 2006 018 327 A1 , Such machines are fed with already preformed and individualized trays, which are usually stored stacked after molding. The containers are removed from the stock individually and placed on a conveyor belt, where they are filled from above with a product. Subsequently, in the conventional tray sealing machine, a sealing film is applied to the upwardly open trays which both close and seal the trays.
  • Packaging machines with a punching or forming station for a cover film are made DE 22 59 556 A1 .
  • Object of the present invention is to overcome these disadvantages with structurally simple means possible.
  • thermoforming offers the advantage that the packaging significantly better than before the respective Product can be adjusted, although the containers are already preformed. In particular, products projecting beyond the edge of the container can also be accommodated in the containers without the lid film being stretched over the product.
  • aesthetic advantages since the top of the packaging, in contrast to conventional tray sealing machines no longer needs to be flat, but can be structured.
  • the lidding film is heated in front of the former and / or in the former to allow deep drawing. Preheating the lidding film in front of the former can speed up deep drawing and reduce unnecessary delays of other components of the packaging machine.
  • the cover film prefferably be deep-drawn in its entirety or at least in sections to the side of the cover film facing the container when it is closed. In this way, a lid portion is formed in the lid film, which protrudes into the interior of the container. This is particularly suitable for products or areas of a product that are lower than the edge of the container.
  • the cover film could be deep-drawn in its entirety or at least in sections to the side of the cover film facing away from the container when closing it. In this way, a dome-shaped cover portion is formed, which protrudes upwards over the container edge and allows the inclusion of supernatant products, without the lid film spans over the product.
  • At least one concave and / or one convex section may be formed during deep drawing on the side of the lid foil facing the container when closing. They may facilitate the abutment of complementary shaped areas of the products on the lid, for example to prevent slipping of the products in the containers.
  • the shaping device can be provided separately from the closing station. However, the entire packaging machine becomes more compact and thus the process less expensive when the deep drawing is carried out within the Versch.station itself.
  • cover film a flexible film or a hard film could be used, provided that they can be suitably deep-drawn.
  • a multilayer film is used as the cover film.
  • a cover film it would be conceivable to use a combination of an oxygen-impermeable outer layer and an oxygen-permeable inner layer in order to allow oxygen to flow around the products.
  • the lidding film or the cover section formed in it is placed on the respective containers only in the form of a "slip lid" by positive locking.
  • the lid portion may snap on an edge of the container to securely connect the lid to the container.
  • the lidding film is sealed onto the container, in particular if the interior of the container is to be sealed airtight.
  • the transport of the closed containers, which are connected to the lidding film, from the closing station can ensure that further lidding film is used, which serves to close subsequent containers. In this way, it would be possible to dispense with a separate conveying device for the cover film.
  • the invention also relates to a packaging machine for carrying out the method according to the invention.
  • This packaging machine has a forming device for deep drawing the thermoformable lid film.
  • the molding device has an exchangeable insert which determines the deformation of the cover film relative to a cover section.
  • This insert can be replaced if it is worn, or if another form of lid for the container is to be made.
  • the tensile force on the lid film may not be sufficient only by moving the closed container still connected to the lid film.
  • a separate conveyor for the cover film is provided, for example a clamp chain arranged on both sides, which can also serve for laterally tensioning the cover film.
  • the packaging machine according to the invention preferably has a tool for placing and / or sealing the lid film on the containers. In this tool thus the actual closing of the container.
  • the tool itself may comprise a lower tool and an upper tool, which are movable relative to each other. Thus, they can open to receive the unclosed container and to close and possibly evacuate and / or fumigate the container to reduce the space occupied between them.
  • the lower tool and the upper tool can be spaced from each other by the relative movement at least as far as the sum of the height of a container and the height of a lid portion of the lid film.
  • the closing tool also allows the inclusion of containers in which the product and the lid over the edge of the container survive.
  • FIG. 1 shows a perspective view of a first embodiment of a packaging machine 1 according to the invention.
  • a packaging machine 1 is a tray sealing machine ("Traysealer").
  • the packaging machine 1 has a Machine frame 2, on which a closing station 3 for closing and optionally for evacuating, gassing and / or sealing of supplied, cup-shaped containers and for cutting a lid foil used for closing is arranged.
  • the closing station 3 is located under an openable hood 4.
  • the packaging machine 1 further comprises a feed belt 5 for feeding the containers, a discharge belt 6 for transporting the sealed containers, a film feed roller 7 for receiving and feeding a roll of a lid film, a film tensioning device 8 for tensioning the lid film, and a Folienrestaufwickler 9 for winding the after sealing, remaining film residues.
  • a display 10 allows the operator of the packaging machine 1 to check and control the operation of the packaging machine 1. On the display 10 for this purpose controls 11 may be provided, such as panels or switches to affect the operation of the packaging machine 1.
  • FIG. 2 shows in a first embodiment of the packaging machine 1 according to the invention in a schematic view a vertical section through the closing station 3.
  • the closing station 3 has a tool 12, which in turn has an upper tool 13 and a lower tool 14.
  • Upper tool 13 and lower tool 14 are movable in the vertical direction relative to each other.
  • Upper and lower tool 13, 14 can form a closed chamber 15 in a closed state between them (see FIG. 3 ).
  • a lifting table 16 On the lower tool 14, a lifting table 16 is provided, which can be moved via a lifting rod 17 in the vertical direction independently of the lower tool 14.
  • the lifting table 16 forms a recess or recess 18 for receiving a prefabricated, cup-shaped container 19.
  • This container 19 may for example consist of a hard plastic.
  • a plurality of containers 19 are stacked and stored in this manner. From this supply they can be removed individually and placed on the conveyor belt 5 of the packaging machine 1 to be filled there.
  • FIG. 2 It can be seen that an edge 20 of the container rests on an edge of the lifting table 16 or the trough 18. It can also be seen that the container 19 with a product 21 is filled, which projects beyond the plane formed by the edge 20 of the container 19 upwards.
  • the upper tool 13 is constructed more expensive. It in turn has three tool components, which can be moved within the upper tool 13 both independently of one another, and independently of the outer wall 22 of the upper tool 13 in the vertical direction relative to each other.
  • the innermost tool component is a molding device 23 for molding a cover section in the single or multi-layer cover film 24 brought up by the film feed roller 7.
  • the molding device 23 is concave on the surface 25 facing the container 19.
  • the former 23 may have vacuum lines (not shown) to create a vacuum between the surface 25 and the lid film 24.
  • a sealing plate 26 is arranged, which has downwardly projecting sealing edges 27.
  • the sealing edges 27 are shaped so that they can contact the edge 20 of the container 19 when lowering the sealing plate 26.
  • a cutting device 28 is provided above the sealing plate 26, that is between the sealing plate 26 and the outer wall 22 of the upper tool 13. It has downwardly projecting cutting edges 29, which are designed to sever the lidding film 24.
  • the tool 12 may moreover have means for evacuating and / or gassing the chamber 15 formed between the upper and lower dies 13, 14.
  • thermoformable cover film 24 passes over a first deflection roller 30 and is deflected there so that it passes through the interior of the tool 12 substantially parallel to the plane formed by the edge 20 of the container 19.
  • the remaining portions of the cover sheet 24 remaining after closing the containers 19 and punching out the lid portions pass via a second deflection roller 31 to a residual film winder 9 in order to be collected there.
  • a film tensioning device 8 which in FIG. 2 the sake of clarity is no longer shown.
  • a pre-heater 32 is provided between the film feed roller 7 and the first guide roller 30 .
  • the heating device 32 may be a heating plate which is heated, for example, by a thermal fluid or electrical heating means.
  • the heater 32 serves to heat a predetermined portion 33 of the lidding film 24 to a temperature which allows thermoplastic molding of the lidding film 24 in a deep drawing operation.
  • FIG. 2 shows the tool 12 of the packaging machine 1 according to the invention in a state in which a filled with product 21 shell 19 was inserted into the trough 18 of the lifting table 16 and guided into the interior of the tool 12.
  • Upper and lower tool 13, 14 are so far away from each other for this purpose, that the distance A between the lower edge of the upper tool 13 and the upper edge of the lower tool 14 is greater than the sum of the height of the container 19 and the protruding part of the product 21st to allow in this way the introduction of the filled container 19 in the tool 12.
  • Under the heater 32 a certain portion 33 of the lid sheet 24 is heated.
  • FIG. 3 shows the tool 12 in a state in which initially the cover sheet 24 has been promoted so far that the heated portion 33 is below the mold 23. At this time, the feed of the lid sheet 24 is stopped.
  • upper tool 13 and lower tool 14 moves towards each other until they pinch the cover sheet 24 between their edges and form a closed chamber 15 between them. Since the advance of the cover film 24 is stopped, a further section 33 'of the cover film 24 can now be brought to the temperature required for deformation under or in the heating device 32.
  • the lid portion 35 is in FIG. 5 shown. It has a shape which is complementary on the outside to the edge 20 of the container 19. On the product 21 side facing the lid portion 35 is concave.
  • FIG. 6 shows the tool 12 in a state in which - starting from the state in FIG. 5 -
  • the lifting table 16 has been raised until the edge 20 of the container 19 comes into contact with the cover sheet 24.
  • This movement of the lifting table 16 is indicated by the arrow 36.
  • the sealing plate 26 is lowered until its sealing edges 27 come into contact with the cover film 24 from above. In this state, the lid film 24 is now sealed onto the edge 20 of the container 19.
  • the cutting device 28 is lowered so that their cutting edges 29, the lid sheet 24 cut around the closed container 19. This movement of the cutting device 28 is indicated by the arrow 38.
  • FIG. 8 the tool 12 is opened. This is done by lower tool 14 and lifting table 16 down and upper tool 13 with mold 23, sealing plate 26 and cutter 28 are moved upwards.
  • the lid portion 35 is firmly connected by sealing to the rest of the container 19 and remains on the container 19.
  • the filled container 19 can now be removed from the tool 12.
  • the cover film 14 can be transported forward, with the remainder of the cover film 24 remaining on the film wound on the film remover 9 being wound up during cutting.
  • the closing operation can now be carried out in the same way for a subsequent container.
  • FIG. 9 shows a second embodiment of a packaging machine according to the invention 1. It differs from the first embodiment that the mold 23 for forming the lid portions 35 is no longer provided in the closing tool 12, but in the range of the heater 32. Otherwise, upper tool 13 and lower tool 14 of Closing tool 12 remained unchanged. Especially the upper tool 13 furthermore has a sealing plate 26 and a cutting device 28, while the lower tool 14 furthermore has a lifting table 16.
  • the molding device 23 has a first mold half 39 and a second mold half 40. As indicated by the arrows 41, the two mold halves 39, 40 can be moved relative to one another perpendicular to the plane of the cover film 24, so that they close to the cover film 24 and the lid film 24 can release.
  • a replaceable insert 42 is provided in the first mold half 39. Its lid surface 24 facing surface 43 defines the shape of the lid portion 35 when the heated by the heater 32 in the opposite, second mold half 40 portion of the lid sheet 24 is applied by applying a vacuum to the surface 43 of the insert 42 to the cover sheet 24th to pull deeply.
  • FIGS. 9 to 15 show various steps of the inventive method in the operation of the packaging machine 1 according to the second embodiment.
  • FIG. 9 shows the packaging machine 1 in a state in which a fresh portion of the lidding film 24 has been brought into the former 23.
  • FIG. 10 the two mold halves 39, 40 of the former 23 have been closed.
  • Arrows 44 indicate that a vacuum is created on the insert 42 of the former to apply the lid film 24 to the insert 42 of the first mold half 39 in this area, thereby forming a lid portion 35.
  • the insert 42 can be exchanged if cover sections 35 are to be produced with a different shape.
  • FIG. 11 shows the state of the packaging machine 1 after the thermoforming of the lid film 24 in the former 23.
  • the lid film 24 now has a lid portion 35th
  • FIG. 12 the two mold halves 39, 40 have been removed from each other.
  • the opening 45 formed between them must now be large enough at least in the starting direction from the shaping device 23 to allow the curved lid section 35 to pass.
  • FIG. 14 shows the packaging machine 1 in a state in which the closing tool 12 has been closed by moving upper tool 13 and lower tool 14 towards each other.
  • Contact between the sealing edges 27 of the sealing plate 26 and the rim 20 of the container 19 adjacent by raising the lifting table 16 allows the lidding film 24 to be sealed to the container 19.
  • the cutter 28 has been lowered to cut out the closed container.
  • the molding device 23 has closed at the same time to a new portion of the cover sheet 24 to form a further cover portion 35.
  • the inventive method and the packaging machine according to the invention can be changed in many ways.
  • the lid portions 35 are not sealed to the edge 20 of the container 19, but are merely placed in the form of slip-on lids on the container 19 by positive engagement.
  • the lid portion 35 any shape.
  • the molding device 23 may have a replaceable insert 42.
  • a plurality of lid portions 35 may be made behind or side by side in the forming device 23, and a plurality of containers 19 may be simultaneously closed in the closing station 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Closing Of Containers (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Claims (15)

  1. Procédé de fermeture de récipients (19), déjà préformés et séparés, avec une feuille formant couvercle (24) dans un poste de fermeture (3) d'une operculeuse de barquettes (1),
    caractérisé en ce que,
    une feuille emboutissable est utilisée en tant que feuille formant couvercle (24) et la feuille formant couvercle (24) est emboutie dans un dispositif de moulage (23) de l'operculeuse de barquettes (1), l'emboutissage de la feuille formant couvercle (24) ayant lieu avant la fermeture du récipient (19) avec la feuille formant couvercle (24),
    l'emboutissage de la feuille formant couvercle (24) est mis en oeuvre dans le poste de fermeture (3),
    et, dans le poste de fermeture (3), le récipient (19) est mis sous vide et/ou rempli d'un gaz.
  2. Procédé selon la revendication 1, caractérisé en ce que la feuille formant couvercle (24) est chauffée avant le dispositif de moulage (23) et/ou dans le dispositif de moulage (23).
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la feuille formant couvercle (24) est emboutie au moins par sections du côté de la feuille formant couvercle (24) qui est tourné vers le récipient (19) lors de la fermeture.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la feuille formant couvercle (24) est emboutie au moins par sections du côté de la feuille formant couvercle (24) qui est détourné du récipient (19) lors de la fermeture.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, grâce à l'emboutissage, au moins une section concave et/ou une section convexe sont formées sur le côté de la feuille formant couvercle (24) qui est tourné vers le récipient (19) lors de la fermeture.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une feuille flexible ou une feuille rigide est utilisée en tant que feuille formant couvercle (24).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une feuille multicouche est utilisée en tant que feuille formant couvercle (24).
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la feuille formant couvercle (24) est positionnée sur le récipient (19) par complémentarité de forme.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la feuille formant couvercle (24) est scellée sur le récipient (19).
  10. Machine à operculeuse de barquettes (1) pour une mise en oeuvre d'un procédé selon l'une quelconque des revendications précédentes de fermeture de récipients (19), déjà préformés et séparés, avec une feuille formant couvercle (24), la machine d'emballage (1) présentant un dispositif de moulage (23) destiné à l'emboutissage de la feuille formant couvercle (24) emboutissable dans un poste de fermeture (3).
  11. Machine à operculeuse de barquettes selon la revendication 10, caractérisée en ce que le dispositif de moulage (23) est conçu pour former au moins une section concave et/ou une section convexe sur le côté, tourné vers le récipient (19) lors de la fermeture, de la feuille formant couvercle (24).
  12. Machine à operculeuse de barquettes selon l'une quelconque des revendications 10 ou 11, caractérisée en ce que le dispositif de moulage (23) présente un insert (42) interchangeable déterminant la déformation de la feuille formant couvercle (24).
  13. Machine à operculeuse de barquettes selon l'une quelconque des revendications 10 à 12, caractérisée en ce qu'un moyen de convoyage pour la feuille formant couvercle (24) est prévu en complément d'un moyen de transport pour le récipient (19).
  14. Machine à operculeuse de barquettes selon la revendication 13, une chaîne à pinces étant prévue en tant que moyen de convoyage pour la feuille formant couvercle (24).
  15. Machine à operculeuse de barquettes selon l'une quelconque des revendications 10 à 14, caractérisée en ce qu'un outil (12) destiné au positionnement et/ou au scellement de la feuille formant couvercle (24) sur le récipient (19) est prévu.
EP10004362.9A 2009-05-13 2010-04-23 Machine d'emballage et procédé de fermeture de récipients dotés de couvercles Not-in-force EP2251264B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009020892A DE102009020892A1 (de) 2009-05-13 2009-05-13 Verpackungsmaschine und Verfahren zum Verschließen von Behältern mit Deckeln

Publications (2)

Publication Number Publication Date
EP2251264A1 EP2251264A1 (fr) 2010-11-17
EP2251264B1 true EP2251264B1 (fr) 2013-08-28

Family

ID=42456611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10004362.9A Not-in-force EP2251264B1 (fr) 2009-05-13 2010-04-23 Machine d'emballage et procédé de fermeture de récipients dotés de couvercles

Country Status (4)

Country Link
US (1) US20100287893A1 (fr)
EP (1) EP2251264B1 (fr)
DE (1) DE102009020892A1 (fr)
ES (1) ES2426785T3 (fr)

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DK2960165T3 (da) * 2014-06-24 2017-11-13 Multivac Sepp Haggenmüller Se & Co Kg Dybtrækningsemballeringsmaskine og fremgangsmåde
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US20100287893A1 (en) 2010-11-18
DE102009020892A1 (de) 2011-02-10
EP2251264A1 (fr) 2010-11-17
ES2426785T3 (es) 2013-10-25

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