EP1957371B1 - Procede de retraction pour produire des emballages solides transportables et imprimables et dispositif permettant de mettre en oeuvre ce procede - Google Patents

Procede de retraction pour produire des emballages solides transportables et imprimables et dispositif permettant de mettre en oeuvre ce procede Download PDF

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Publication number
EP1957371B1
EP1957371B1 EP06753186A EP06753186A EP1957371B1 EP 1957371 B1 EP1957371 B1 EP 1957371B1 EP 06753186 A EP06753186 A EP 06753186A EP 06753186 A EP06753186 A EP 06753186A EP 1957371 B1 EP1957371 B1 EP 1957371B1
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EP
European Patent Office
Prior art keywords
container
air
shrinking process
film
area
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
EP06753186A
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German (de)
English (en)
Other versions
EP1957371A1 (fr
Inventor
Heinrich Justen
Markus Dumon
André MISZEWSKI
Kurt Jansen
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.)
KHS GmbH
Original Assignee
KHS GmbH
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
Priority claimed from DE102005059295A external-priority patent/DE102005059295B4/de
Application filed by KHS GmbH filed Critical KHS GmbH
Priority to PL06753186T priority Critical patent/PL1957371T3/pl
Publication of EP1957371A1 publication Critical patent/EP1957371A1/fr
Application granted granted Critical
Publication of EP1957371B1 publication Critical patent/EP1957371B1/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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/063—Tunnels
    • 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
    • B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
    • B65B63/08—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for heating or cooling articles or materials to facilitate packaging
    • 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
    • B65B2220/00—Specific aspects of the packaging operation
    • B65B2220/24—Cooling filled packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
    • B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
    • B65D71/08—Wrappers shrunk by heat or under tension, e.g. stretch films or films tensioned by compressed articles

Definitions

  • the invention relates to a shrinking process for the production of solid, transportable and printable containers, in particular bottle containers with a height / width ratio of> 1, consisting of a wrapping of the goods to be packaged with a film so that an overlapping region of the film ends is formed on the bottom surface, heating or convection heating to fuse the free ends in the overlap area and a final heating while simultaneously stabilizing the resulting package by the shrinking operation.
  • the WO 02/36436 A1 describes a multi-zone shrink tunnel with a pre-shrink zone with heated ambient air and a heat zone in which a lateral, final H exert mobilisdung the wrapped in foil goods.
  • the goods are here first, preferably using a solid transport tray, combined into groups and wrapped in foil.
  • the foil ends which overlap at the bottom of the container are sealed by blowing hot air over a wide area and are subjected to the final shrinkage process after a pre-shrinking process. So that the finished containers are printable, they must have constant dimensions and flat surfaces.
  • the printable area should provide sufficient resistance to the pressure roller resting on the print roller, since otherwise a blurred printed image is produced.
  • heating of the entire product is limited, e.g. in foods such as chilled dairy products or carbonated, pressurized beverages. Therefore, the shrinking temperatures were lowered, thereby prolonging the process time. However, the lower temperatures caused problems in the welding, so that not always the required strength in the container shell was achieved.
  • the inventors also found that sealing the overlapping foil ends at lower temperature avoids significant heating of the products themselves, but especially with the continuous transport of the containers involves the problem that the enveloping film is inflated and slipping on side blowing with hot air. This reinforced the already described Tilting of individual objects of the goods to be packaged or to change their position.
  • the object of the present invention was therefore to offer a shrinking process and a device for carrying out this shrinking process, the production of a solid container of goods with a height / width ratio of> 1, preferably> 2, with constant packing density and geometric shape without separate tray allows the individual goods to be heated at best superficially. For units that are or may only be heated on their surface, this means that the core temperature must be kept low and the energy released to the environment must be reduced. Other aspects include space requirements, process control with flexible container sizes and reduction of environmental pollution through outgassing of film materials.
  • the incoming hot air is deflected under intimate interaction with the film at the bottom of the container and recycled in the reverse flow direction in the gas circulation system.
  • This form of hot gas guide will be referred to as reverse flow hereinafter.
  • reverse flow By a parallel movement of the convection zone and the bottom of the can at different speeds it is achieved that the convection zone migrates slowly during the transport of the container over the entire bottom surface, without causing heat accumulation or irregular shrinkage of the film on the container sides.
  • Due to the special gas flow in the form of a reverse flow the heat transfer takes place in a defined convection zone from the hot gas into the bottom surface of the container.
  • the zonal energy input can be optimally adapted to the material thickness or density of the film by controlling the flow velocity of the hot gas and optimally via the exactly definable heat exchange or convection surface.
  • the device according to the invention for carrying out a shrinking process is shown in front view. It can be seen the supply and exhaust air system 5, 7 with the container 1, which is arranged on a conveyor belt 2 via a hot air source 3.
  • the hot air applied in reverse flow serves to form a pre-stabilizing edge shell 32 in the bottom region of the container.
  • the container 1 is shown in a system which has a lateral hot air supply 5.
  • the goods (bottles) of the container are conveyed through a conveyor belt 6 in the product running direction through the shrinking 4.
  • the container 1 with the enveloping film 8 passes in front of the hot air supply 5, there is the risk that the film casing is inflated by the air pressure and thereby threatens to slip. This is prevented by the previously formed edge shell in the region of the bottom of the container, which stabilizes the shape of the container and thus the arrangement of the goods.
  • the shrinking system is shown in side view, wherein in the left part of the system laterally next to the hot air source 3, an exhaust system 7A 7B is indicated.
  • the exhaust air is completely or partially recycled or recycled for the preparation of the hot air, so that in conjunction with the continuous transport heat accumulation can be avoided.
  • the horizontally acting hot air nozzles 5a 5b are shown. These initiate the all-round shrinkage process on the container enclosed by a wrapping film 8.
  • the two sections formation of the edge shell, finish shrinkage
  • the hot air supply is designed as a reverse flow.
  • the net-like structure of the conveyor belt 2 is partially covered by the slides 10, 11. This ensures that only the bottom surface 12 of the transported container or a sub-area is acted upon by the incoming hot air (mitwandernde convection zone).
  • the hot gases flow at high pressure from the laterally disposed nozzles 5.
  • the flow rate can be further increased and directed over the entire surface constantly against the film 8, since the container on the bottom surface has already been stabilized so that the order the bottle-shaped goods 13 turned over film 8 withstands a high lateral pressure load.
  • the container 1 stands on a mesh or lattice-like structure 9, so that the hot air flowing out of the nozzle field 33 via the nozzle 14 has access to a Convection zone 15 of the conveyor belt 6 has.
  • the convection zone 15 the heat transfer from the hot gas by convection takes place in the bottom surface 12 of the container. After deflection on the surface of the container bottom, the hot gas flows in the direction of arrow via suction openings 16, 17 back into the exhaust air area.
  • Fig. 4 shows the transport of the container 1 via an inventively according to the principle of the reverse flow formed air exchange plate 29 with convection zone 15 for forming a stabilizing edge shell.
  • the flow direction of the hot supply air 5 is deflected into the exhaust air system 7a, 7b.
  • the zonal control of the longitudinal and transverse slides 23, 26 is necessary in order to achieve the follow-on movement of the convection zone and bottom surface 12 of the container while avoiding heat build-up.
  • FIG. 5 On the left edge of the picture is in partial cross section of Fig. 5 a preferred variant of the invention designed according to the air exchange plate 29 for the discrete hot air in the area of the bottom of the container.
  • the air exchange plate 29 includes sliding ribs 31, on which the net-like conveyor belt 18 is supported.
  • the container 1 contains a plurality of products 19 enveloped by a shrink film 20.
  • Zone activation can be done manually or automatically.
  • the container 1 is conveyed in the direction of the arrow over the reticulated conveyor belt 18 in the sphere of influence of the hot air source 3 (vertical arrow).
  • the longitudinal slide 23 is set manually. This can be adjusted via an eccentric adjustment 24 Fig. 7 respectively.
  • the slider adjustment is controlled by a zone activation 25, with the help of the cross slide 26 depending on the position of the product or the container 1 on the conveyor belt 18 either activate the supply air or switch off.
  • a perforated plate as a cross slide 26 and pipes 27 for the hot air supply and a separation housing 28 for the supply and exhaust air are required according to the embodiment.
  • the above example shows how, in the device according to the invention, the hot gas is conducted to form a stabilizing edge shell on the principle of the reverse flow.
  • the heating surface is represented by an air exchange plate, which includes a special gas guide in which the gas is transferred from an open to a closed loop system.
  • On the heating surface is a field of pits, e.g. in channel or bell shape, wherein in each bell a centrally arranged Zu Kunststofftechnik is arranged in the form of a nozzle which has a very small distance from the heating surface.
  • On the side of the bell are one or more exhaust units in the form of suction, whose diameter and number is selected so that the inflowing supply air is sucked off after deflection at the bottom of the container.
  • the container 1 stands on a net or grid-like structure 9 or 10, so that the hot air flowing up from a sink or bell has access to the convection zone 15.
  • the convection zone 15 the heat transfer from the hot gas by convection takes place in the bottom surface of the container. After deflection on the surface of the container bottom, the hot gas flows via suction openings 16, 17 back into the exhaust air area.
  • the device according to the invention can be controlled in wide sections of the convection zone.
  • a zone with the required energy requirement is supplied via temperature and flow profiles that the user can specify depending on the path.
  • the energy requirement is calculated or determined empirically based on the material thickness, the material density or on the heat capacities of the film to be heated. Thereafter, the film can be tempered specifically.
  • the plastic By cooling in the last process step, on the one hand, the plastic is transferred from the plastic region into the elastic region, the maximum stresses in the material increasing and solidifying. On the other hand, the film also shrinks during this cooling whereby the tensions in the film increase and the container stabilizing holding forces are greater. If the environment is too hot, it must be actively cooled because the ambient air is insufficient to solidify.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Packages (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (12)

  1. Procédé de rétraction pour fabriquer des emballages rigides, transportables et imprimables, en particulier les emballages de bouteilles avec un rapport hauteur/largeur supérieur à 1 et avec des objets de remplissage sensibles à la chaleur, comprenant un enveloppement des objets à emballer avec un film, de sorte qu'une zone de chevauchement des extrémités de film se forme sur la surface du sol, un réchauffement par échange de chaleur resp. convection, afin de faire fondre des extrémités libres dans la zone de chevauchement, et un réchauffement final dans un four de rétraction, l'emballage qui se forme étant stabilisé par l'opération de rétraction, caractérisé en ce que
    l'air chaud entrant est limité par zone pour commencer à la surface du sol de l'emballage pour la formation d'une coque périphérique dans la zone des fonds de bouteille et l'emballage est alors stabilisé au niveau de la forme,
    l'emballage est transporté de façon continue pendant la stabilisation et l'air chaud dirigé dans un faisceau de jets de gaz discrètement répartis sur la zone de fond de l'emballage est dévié après un échange de chaleur limité par zone avec le film et recyclé,
    et en ce que, dans le four de rétraction, un autre gaz chaud est dirigé avec une vitesse de soufflage latérale élevée sur le côté vers l'emballage encore transporté de façon continue, afin d'appliquer complètement le procédé de rétraction.
  2. Procédé de rétraction selon l'une quelconque des revendications précédentes, caractérisé en ce que le film est soudé et rétracté en même temps pour former un fond d'emballage et une partie formée par complémentarité de forme de la zone de fond de l'emballage se forme alors.
  3. Procédé de rétraction selon l'une quelconque des revendications précédentes, caractérisé en ce que les emballages sont déplacés pendant l'opération de soudage sur un dispositif de transport, l'air chaud entrant étant aspiré après l'échange de chaleur et étant commandé alors de telle sorte que le soudage est limité à la zone de chevauchement ou à une surface partielle du sol.
  4. Procédé de rétraction selon l'une quelconque des revendications précédentes, caractérisé en ce que l'alimentation par zone s'effectue par l'activation d'unités d'éjection et d'évacuation d'air réparties discrètement, qui peuvent être commandées de façon mécanique, hydraulique ou électrique.
  5. Procédé de rétraction selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une dépression est formée dans l'unité d'évacuation d'air, laquelle dépression est suffisante pour accélérer l'air chaud provenant de l'unité d'éjection dans la zone de recouvrement et la guider avec une vitesse élevée sur les extrémités de film à souder.
  6. Procédé de rétraction selon l'une quelconque des revendications précédentes, caractérisé en ce que la commande des unités d'arrivée et d'évacuation d'air s'effectue par des coulisseaux transversaux et longitudinaux, les unités individuelles étant activées à partir des unités d'arrivée et d'évacuation d'air réparties discrètement en fonction de l'alimentation par zone des extrémités de film dans la zone de chevauchement.
  7. Dispositif pour mettre en oeuvre un procédé de rétraction pour la fabrication d'emballages rigides, transportables et imprimables, en particulier d'emballages de bouteilles avec un rapport hauteur/largeur supérieur à 1 avec des objets de remplissage sensibles à la chaleur, comprenant une machine d'emballage, dans laquelle les produits à emballer sont enveloppés avec un film, réchauffés puis conditionnés dans un four de rétraction pour former un emballage rigide, les emballages étant déplacés sur une bande transporteuse pendant le réchauffement, caractérisé en ce que la bande transporteuse (6) présente une structure (9) en forme de filet, des unités d'arrivée et d'évacuation d'air réparties discrètement étant disposées dans la zone de réchauffement au-dessous de la bande transporteuse, alors que des buses d'air chaud (5) sont dirigées dans la plage de rétraction pour l'alimentation en air chaud latérale avec une vitesse d'arrivée élevée vers les emballages,
    et en ce que, au-dessous de la structure en forme de filet, les unités d'entrée et d'évacuation d'air (21, 22) sont dotées de coulisseaux transversaux et longitudinaux disposés à la façon d'un registre pour la limitation par zone du courant d'air chaud sur la zone de fond des emballages.
  8. Dispositif selon la revendication 7, caractérisé en ce que l'unité d'arrivée et d'évacuation d'air est guidée au-dessous de la bande transporteuse (6) dans un circuit fermé.
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que chaque unité d'arrivée et d'évacuation d'air (21, 22) est disposée dans une cavité d'une plaque coulissante (16) et en ce que les unités d'arrivée et d'évacuation d'air utilisées pour le réchauffement de la surface du fond sont connectées sous forme de cavités réparties discrètement dans la plaque coulissante (16) au moyen des coulisseaux transversaux et longitudinaux (23, 26) disposés à la façon d'un registre.
  10. Dispositif selon les revendications 7, 8, 9, caractérisé en ce que les cavités sont conçues sous forme de cloches ou de canaux.
  11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'écoulement de gaz est conçu sous forme d'écoulement réversible, la vitesse d'écoulement du gaz chaud étant inversée après l'échange de chaleur avec la surface de fond.
  12. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les sens d'écoulement de sortie et d'entrée des unités d'entrée et d'évacuation d'air (21, 22) sont disposés en parallèle de façon juxtaposée.
EP06753186A 2005-12-09 2006-05-19 Procede de retraction pour produire des emballages solides transportables et imprimables et dispositif permettant de mettre en oeuvre ce procede Active EP1957371B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06753186T PL1957371T3 (pl) 2005-12-09 2006-05-19 Proces kurczenia dla wytwarzania mocnych, nadających się do transportu i podatnych na drukowanie opakowań zbiorczych i urządzenie do przeprowadzania takiego procesu kurczenia

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005059295A DE102005059295B4 (de) 2004-12-10 2005-12-09 Schrumpfprozess zur Herstellung von festen, transportfähigen und bedruckbaren Gebinden und Vorrichtung zur Durchführung eines derartigen Schrumpfprozesses
PCT/DE2006/000870 WO2007065385A1 (fr) 2005-12-09 2006-05-19 Procede de retraction pour produire des emballages solides transportables et imprimables et dispositif permettant de mettre en oeuvre ce procede

Publications (2)

Publication Number Publication Date
EP1957371A1 EP1957371A1 (fr) 2008-08-20
EP1957371B1 true EP1957371B1 (fr) 2009-05-06

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EP06753186A Active EP1957371B1 (fr) 2005-12-09 2006-05-19 Procede de retraction pour produire des emballages solides transportables et imprimables et dispositif permettant de mettre en oeuvre ce procede

Country Status (9)

Country Link
US (1) US7946100B2 (fr)
EP (1) EP1957371B1 (fr)
JP (1) JP5064410B2 (fr)
CN (1) CN101356094B (fr)
AT (1) ATE430697T1 (fr)
BR (1) BRPI0619593B1 (fr)
DE (1) DE502006003687D1 (fr)
PL (1) PL1957371T3 (fr)
WO (1) WO2007065385A1 (fr)

Cited By (1)

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DE202009005047U1 (de) 2009-07-21 2009-09-17 Krones Ag Schrumpftunnel

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CN101633415B (zh) * 2009-08-06 2011-07-06 贵阳黔中化轻制品厂 广口瓶的热收缩膜整体包裹及装箱方法
DE102010012597A1 (de) * 2010-03-24 2011-09-29 Multivac Sepp Haggenmüller Gmbh & Co. Kg Einrichtung zum Transportieren von Objekten
US20120240525A1 (en) * 2011-03-25 2012-09-27 Summerford Wayne C Method and System for Applying Tamper Evident Banding
ES2545821T3 (es) * 2012-04-18 2015-09-16 Borealis Ag Un proceso para envolver mediante agrupación por retracción una pluralidad de contenedores individuales
EP2653394B1 (fr) * 2012-04-18 2015-03-04 Krones Aktiengesellschaft Dispositif de rétractation avec baguette d'obturation
DE102013103863A1 (de) * 2013-04-17 2014-10-23 Krones Aktiengesellschaft Schrumpfvorrichtung und Verfahren zur Anpassung einer Schrumpfvorrichtung
DE102013104666A1 (de) * 2013-05-07 2014-11-13 Krones Ag Vorrichtung und Verfahren zum Herstellen von Behältniszusammenstellungen
KR20160029532A (ko) * 2014-09-05 2016-03-15 김승섭 스팀 포장기의 스팀 공급장치
CN104260939A (zh) * 2014-09-21 2015-01-07 江苏艾津农化有限责任公司 蒸汽热收缩膜包装机
DE102017119145A1 (de) * 2017-08-22 2019-02-28 Krones Aktiengesellschaft Schrumpfvorrichtung und Verfahren zum Ansaugen von Luft aus einem Innenraum einer Schrumpfvorrichtung
CN107804530A (zh) * 2017-10-31 2018-03-16 佛山汉格斯环保科技有限公司 一种环保餐具热缩膜机
FR3090590B1 (fr) * 2018-12-20 2021-06-11 C E R M E X Constructions Etudes Et Rech De Materiels Pour Lemballage Dexpedition Procédé de conditionnement par fardelage de lots de produits, dispositif de chauffage et installation avec un tel dispositif.
CN110053826A (zh) * 2019-04-25 2019-07-26 北京市继远斋食品厂 一种热收缩机

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Publication number Priority date Publication date Assignee Title
DE202009005047U1 (de) 2009-07-21 2009-09-17 Krones Ag Schrumpftunnel

Also Published As

Publication number Publication date
JP2009518239A (ja) 2009-05-07
ATE430697T1 (de) 2009-05-15
JP5064410B2 (ja) 2012-10-31
PL1957371T3 (pl) 2009-10-30
CN101356094A (zh) 2009-01-28
DE502006003687D1 (de) 2009-06-18
EP1957371A1 (fr) 2008-08-20
BRPI0619593B1 (pt) 2018-10-09
US7946100B2 (en) 2011-05-24
BRPI0619593A8 (pt) 2017-10-24
US20090013649A1 (en) 2009-01-15
WO2007065385A1 (fr) 2007-06-14
BRPI0619593A2 (pt) 2011-10-04
CN101356094B (zh) 2011-11-30

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