EP2733076A1 - Vorrichtung und Verfahren zum Versiegeln und Einschrumpfen einer in eine Schrumpffolie eingewickelten Mehrfachverpackung - Google Patents

Vorrichtung und Verfahren zum Versiegeln und Einschrumpfen einer in eine Schrumpffolie eingewickelten Mehrfachverpackung Download PDF

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Publication number
EP2733076A1
EP2733076A1 EP12192845.1A EP12192845A EP2733076A1 EP 2733076 A1 EP2733076 A1 EP 2733076A1 EP 12192845 A EP12192845 A EP 12192845A EP 2733076 A1 EP2733076 A1 EP 2733076A1
Authority
EP
European Patent Office
Prior art keywords
heat
packages
heating
conveying surface
heating station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12192845.1A
Other languages
English (en)
French (fr)
Inventor
Federico Corazza
Marco Piccinini
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Priority to EP12192845.1A priority Critical patent/EP2733076A1/de
Priority to PCT/EP2013/072663 priority patent/WO2014075918A2/en
Publication of EP2733076A1 publication Critical patent/EP2733076A1/de
Withdrawn legal-status Critical Current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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/04—Machines constructed with readily-detachable units or assemblies, e.g. to facilitate maintenance
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • 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
    • B65B51/20—Applying or generating heat or pressure or combinations thereof by fluid pressure acting directly on folds or on opposed surfaces, e.g. using hot-air jets
    • 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

Definitions

  • the present invention relates to a heating station of the type forming part of a unit for manufacturing a multi-pack comprising a plurality of packages wrapped in a sheet of heat-shrinkable material. Furthermore, the invention relates to a unit and method for manufacturing a such multi-pack.
  • Tetra Brik Aseptic registered trademark
  • a typical example of this type of package is the parallelepiped-shaped package for liquid or pourable food products known as Tetra Brik Aseptic (registered trademark), which is made by folding and sealing laminated strip packaging material.
  • the packaging material has a multilayer structure substantially comprising a base layer intended to confer stiffness and strength and which may comprise a layer of fibrous material, e.g. paper, or of mineral-filled polypropylene material; and a number of layers of heat-seal plastic material, e.g. polyethylene film, covering both sides of the base layer.
  • a base layer intended to confer stiffness and strength and which may comprise a layer of fibrous material, e.g. paper, or of mineral-filled polypropylene material; and a number of layers of heat-seal plastic material, e.g. polyethylene film, covering both sides of the base layer.
  • the packaging material also comprises a layer of gas- and light-barrier material, e.g. aluminium foil or ethyl vinyl alcohol (EVOH), which is superimposed on a layer of heat-seal plastic material, and is in turn covered with another layer of heat-seal plastic material forming the inner face of the package eventually contacting the food product.
  • gas- and light-barrier material e.g. aluminium foil or ethyl vinyl alcohol (EVOH)
  • EVOH ethyl vinyl alcohol
  • packages of this sort are produced on fully automatic packaging machines, on which a continuous tube is formed from the web-fed packaging material; the web of packaging material is sterilized on the packaging machine, e.g. by applying a chemical sterilizing agent, such as a hydrogen peroxide solution, which, once sterilization is completed, is removed from the surfaces of the packaging material, e.g. evaporated by heating; and the web of packaging material so sterilized is maintained in a closed, sterile environment, and is folded and sealed longitudinally to form a vertical tube.
  • a chemical sterilizing agent such as a hydrogen peroxide solution
  • the tube is filled continuously downwards with the sterilized or sterile-processed food product, and is sealed and then cut along equally spaced cross sections to form pillow packs, which are then fed to a folding unit to form the finished, e.g. substantially parallelepiped-shaped packages.
  • a certain number of folded packages for example three, may be grouped in a batch and shrink-wrapped, so as to form a multi-pack.
  • a unit for manufacturing multi-packs is arranged downstream of the folding station.
  • a multi-pack manufacturing unit substantially comprises:
  • the wrapping station is arranged upstream from the heating station and is adapted to receive and loosely wind around a batch of packages a sheet of heat-shrinkable material so that opposite ends of the sheet overlap and are ultimately interposed between the conveyor and the bottom walls of the packages of the respective batch.
  • the wrapping station comprises means for storing, feeding and cutting lengths of a film of a heat-shrinkable material.
  • each sheet of heat-shrinkable material comprises:
  • a such batch shall consist of a number of juxtaposed packages in one or more rows, loosely wrapped in a sheet of heat-shrinkable material, the opposite ends of the sheet overlapping underneath the batch.
  • the width of the heat-shrinkable material length is greater than the overall width of the batch of packages, whereby end portions thereof project off the batch.
  • the projecting ends shrink and bend over the edges of the batch and come to cooperate with it laterally. Accordingly, proper stability of the multi-pack can be conveniently achieved, in that the relative motion of packages within the multi-pack is thus prevented.
  • the sheet of heat-shrinkable material is kept loosely wrapped around the batch by the very weight of the packages in the batch, which rest onto the overlapping ends of the sheet against the surface of the conveyor.
  • the heating station then receives and heats the batches loosely wrapped in their relative sheets, so causing a) the sealing of the latter via local melting of the relative overlapping ends; and b) the overall heat-shrinking of the sheets about the respective batches, which substantially completes the formation of the multi-packs.
  • plastic materials may even make the relative motion of chain segments of the conveyor about the conveyor idler rollers impossible.
  • molten plastics may solidify between the idler rollers and the conveyor chain segments, which results in a complete blockage of the heating station and may cause definitive breakages.
  • a need is therefore felt within the industry for a heating station that makes it possible to overcome the above drawbacks.
  • the need is felt for a heating station of a unit for manufacturing a multi-pack that substantially prevents, or at least significantly hinders, overheating of the metallic mesh and the consequent melting of the heat-shrinkable material wrapped about the batches of packages.
  • the above object is achieved through the provision of a heating station as claimed in Claim 1. Furthermore, according to the present invention, there is provided a unit for manufacturing a multi-pack of the type comprising a plurality of packages wrapped in a sheet of heat-shrinkable material, as claimed in Claim 11.
  • the present invention also relates to a method for manufacturing a multi-pack of the type comprising a plurality of packages wrapped in a sheet of heat-shrinkable material, as claimed in Claim 12.
  • numeral 1 indicates as a whole a heating station adapted to form part of a unit for manufacturing a multi-pack 3 (see also Figure 5 ) of the type comprising a plurality of packages 4 wrapped in a sheet 5 of heat-shrinkable material.
  • a multi-pack manufacturing unit (not illustrated) generally comprises:
  • the wrapping station is arranged upstream from heating station 1 and is adapted to receive and loosely wrap around a batch of packages 4 a sheet 5 of heat-shrinkable material so that opposite ends of the sheet overlap and are interposed between conveyor 10 and the bottom walls of packages 4 of the respective batch when the batch is delivered to heating station 1.
  • Heating station 1 is adapted to receive and heat batches of packages 4 loosely wrapped in their respective sheets 5, opposite ends of the latter overlapping and being interposed between packages 4 (in particular, the relative bottom walls) and a conveying surface upon which they lie, so as to cause a) the sealing of sheets 5 at a relative sealing area (substantially defined by the overlapping ends); and b) the overall heat-shrinking of sheets 5 about the respective batches, thereby completing the formation of multi-packs.
  • the conveying surface is defined by a porous conveyor 10 operatively coupled with heating station and defining a substantially horizontal plane P, for receiving from the wrapping station batches of packages 4 loosely wrapped in sheet 5 of heat-shrinkable material with opposite ends overlapping and interposed between conveyor 10 and packages 4 of the respective batch and for delivering fully formed multi-packs at an output end 11 of heating station 1.
  • conveyor 10 is typically a metal conveyor belt, e.g. a chain-driven wire mesh conveyor belt, of a known type.
  • heating station 1 comprises a first and a second heat applicators 19 and 20 for independently supplying respective first and second thermal flows to the wrapped batches of containers 4 as they are advanced, along a main direction X of advancement, by porous conveyor 10; the first heat applicator 19 being arranged underneath plane P of conveyor 10; the second heat applicator 20 being arranged above plane P of conveyor 10.
  • second heat applicator 20 is arranged downstream of first heat applicator 19.
  • first and second heat applicators 19, 20 are connectable to one or more heat sources 14, 15, which may e.g. consist of independent sources of a heating medium, such as hot air.
  • heating station 1 comprises a first and a second heating chamber 12 and 13 internally defining, together with conveyor 10, operatively distinct volumes V1 and V2.
  • First and second heating chambers 12 and 13 are operatively coupled with first and second heat applicators 19, 20, respectively, and may be materially divided by a separation member 16 that allows batches on conveyor 10 to advance from one chamber to the other, such as a curtain-like element of the type commonly used in known shrink tunnels.
  • heating station 1 comprises a tunnel housing 17, having an inlet 18 in and an outlet 18 out , and defining internally first and second chambers 12, 13 with the aid of conveyor 10, which delimits inferiorly the relative volumes V1 and V2, and of separation member 16, which materially divides volume V1 from volume V2.
  • Separation member 16 may preferably be a curtain of a reinforced silicone rubber, which is known to be able to withstand the operating temperatures at which heat-shrinking is carried out, while minimising heat loss, which helps accurately control temperature within both chambers 12, 13.
  • First chamber 12 is operatively coupled with first heat applicator 19.
  • first heat applicator 19 is defined by first distributing means, fluidly connectable with a first source 14 of a heating medium and arranged immediately underneath conveyor 10 for directing a substantially homogeneous flow of heating medium through the mesh of conveyor 10 and into first volume V1 of first chamber 12.
  • distributing means 19 may comprise a relative distribution chamber 19a fluidically connectable with first source 14 (e.g. a blower) and opening in an upper portion thereof (in other words, superiorly) into a plurality of holes.
  • the top wall of distribution chamber 19a may consist of a perforated plate, which allows for a homogenous distribution of the heating medium over the sealing area, i.e. onto the overlapping ends of the sheet of heat-shrinkable material wrapped around the batches, as illustrated by the arrows in Figures 2 and 4 .
  • Figure 3 illustrates, by way of example, a detail of a possible configuration of the metallic mesh 10a of conveyor 10 as it is driven over the perforated plate of distribution chamber 19a.
  • Second chamber 13 is operatively coupled with second heat applicator 20.
  • second heat applicator 20 is defined by second distributing means, fluidly connectable with a second source 15 of a heating medium and arranged above conveyor 10 in a top portion of tunnel housing 17, for directing a substantially homogeneous flow of heating medium into second volume V2 of second chamber 13 all over the wrapped and sealed batches received from first chamber 12.
  • distributing means 20 may comprise a relative distribution chamber 20a fluidically connectable with second source 15 (e.g. a blower) and opening in a lower portion thereof (in other words, inferiorly) into a plurality of holes.
  • the bottom wall of distribution chamber 20a may consist of a perforated plate, as illustrated by the arrows in Figures 2 and 5 , which allows for a homogenous distribution of the heating medium all over the batch, which favours proper and tight wrapping of the heat-shrinkable material about packages 4.
  • both first and second heat applicators 19, 20 may be connected to a same heat source.
  • heat applicators 19, 20 may be defined by distinct distribution means both connected to a same source of a heating medium, heating station 1 optionally comprising further means for varying the temperature of one flow of heating medium directed to one of heat applicators 19, 20 with respect to the temperature of the other flow of heating medium directed to the other one of heat applicators 20, 19.
  • first and second heat applicators 19, 20 are adapted and configured to supply heat at two different temperatures.
  • first and second heat applicators 19, 20 are preferably connectable to distinct first and second sources 14,15 of heating medium adapted and configured to supply heating medium at two different temperatures.
  • the temperature of the heating medium supplied from the first source 14 is set such that the temperature of the metallic mesh of conveyor 10 at the exit from first chamber 12 never exceeds, in use, a threshold value.
  • the temperature of the heating medium supplied from the first source 14 is set such that sealing of the sheet of heat-shrinkable material is conveniently achieved, while preventing the heat-shrinkable material from sticking to conveyor 10.
  • the temperature of the heating medium supplied from the second source 15 is set such that the temperature of the heat-shrinkable material is brought, and maintained for a given time, above a given threshold value which can be associated with proper and complete shrinking/wrapping about the batch of packages 4.
  • Number 1' in Figure 7 indicates an alternative embodiment of a heating station in accordance with the present invention.
  • Heating station 1' is similar to heating station 1, and is described below only insofar as it differs from the latter, and using, wherever possible, the same reference numbers for identical or corresponding parts of heating stations 1, 1'.
  • heating station 1' differs from heating station 1 in that it comprises only one heating chamber 13' internally defining, together with conveyor 10, a volume V3, and being operatively coupled with second heat applicator 20.
  • heating station 1' comprises a tunnel housing 17, having an inlet 18 in and an outlet 18 out , and defining internally heating chamber 13' with the aid of conveyor 10, which delimits inferiorly the relative volume V3.
  • Figure 7 shows a further view of a heating station 1" comprising a tunnel housing 17, having an inlet 18 in and an outlet 18 out , and defining internally a heating chamber 13.
  • tunnel housing 17 is movable between a first operative position (indicated by the dashed line), wherein it is in slidable cooperation with conveyor 10, and a second operative position, which is vertically superior with respect to the first operative position.
  • heating station 1" comprises means 21 for lifting/holding tunnel housing 17 at a raised position where it does not cooperate with conveyor 10 and direct access to volume V3 and its content is made possible, e.g. for maintenance or inspection operations.
  • lifting/holding means 21 allow tunnel housing 17 to be raised above plane P by a height at least equal to the height of packages 4 being processed.
  • a batch of packages 4 loosely wrapped in its respective sheet 5 of heat-shrinkable material with the relative opposite ends overlapping and interposed inferiorly between the batch and a porous conveying surface is fed to heating station 1, whereby the opposite overlapping ends of the sheet 5 of heat-shrinkable material are sealed and the sheet 5 of heat-shrinkable material is shrunk about the batch of packages 4 to form a multi-pack.
  • a first and a second thermal flows are independently supplied to the wrapped batch of containers 4 as they are advanced, along main direction X of advancement, by the porous conveying surface; the first thermal flow being supplied by a first heat applicator 19 arranged below the porous conveying surface so as to cause sealing of the sheet of heat-shrinkable material; the second thermal flow being supplied by a second heat applicator 20 arranged above the porous conveying surface so as to cause a substantially full shrinking of the heat-shrinkable material about the batch.
  • the first and second thermal flows are supplied as distinct first and second flows of a thermal medium, the first and second flows of heating medium being at two different temperatures.
  • the temperature of the heating medium in the first flow is set such that the temperature of the conveying surface never exceeds, at a given position along direction X, a threshold value.
  • the temperature of the heating medium in the second flow is set such that the temperature of the heat-shrinkable material is brought, and maintained for a given time, above a given threshold value which can be associated with proper and complete shrinking/wrapping about the batch of packages 4.
  • heating station 1 of a manufacturing unit comprising heating station 1 and of the method outlined above, the advantages which can be obtained from the present invention shall be apparent.
  • independent temperature control for the shrinking operation conveniently results in a fully satisfactory (tight) wrapping of the heat-shrinkable material about the packages 4, while the likelihood of melting and sticking to the mesh of conveyor 10 on the part of the heat-shrinkable material is greatly reduced, if not virtually eliminated.
  • heat applicators may be used, such as infrared heat applicators. Different heat supply mechanisms may even be used for the first and second heat applicator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
EP12192845.1A 2012-11-15 2012-11-15 Vorrichtung und Verfahren zum Versiegeln und Einschrumpfen einer in eine Schrumpffolie eingewickelten Mehrfachverpackung Withdrawn EP2733076A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12192845.1A EP2733076A1 (de) 2012-11-15 2012-11-15 Vorrichtung und Verfahren zum Versiegeln und Einschrumpfen einer in eine Schrumpffolie eingewickelten Mehrfachverpackung
PCT/EP2013/072663 WO2014075918A2 (en) 2012-11-15 2013-10-30 Heating station, unit and method for manufacturing a multi-pack comprising a plurality of packages wrapped in a sheet of heat-shrinkable material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12192845.1A EP2733076A1 (de) 2012-11-15 2012-11-15 Vorrichtung und Verfahren zum Versiegeln und Einschrumpfen einer in eine Schrumpffolie eingewickelten Mehrfachverpackung

Publications (1)

Publication Number Publication Date
EP2733076A1 true EP2733076A1 (de) 2014-05-21

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EP12192845.1A Withdrawn EP2733076A1 (de) 2012-11-15 2012-11-15 Vorrichtung und Verfahren zum Versiegeln und Einschrumpfen einer in eine Schrumpffolie eingewickelten Mehrfachverpackung

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EP (1) EP2733076A1 (de)
WO (1) WO2014075918A2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3118128A1 (de) * 2015-07-16 2017-01-18 Krones Aktiengesellschaft Schrumpfvorrichtung
CN109693839A (zh) * 2019-01-28 2019-04-30 张兴宇 一种热缩膜布卷包装机
DE102018132737A1 (de) * 2018-12-18 2020-06-18 Krones Aktiengesellschaft Verfahren und Schrumpftunnel zum Aufschrumpfen thermoplastischen Verpackungsmaterials auf Artikel
FR3090591A1 (fr) * 2018-12-20 2020-06-26 C.E.R.M.E.X. Constructions Etudes et Recherches de Matériels pour l'Emballage d'Expédition Dispositif de conditionnement par fardelage et son procédé
WO2023147271A1 (en) * 2022-01-26 2023-08-03 The Procter & Gamble Company Infrared-assisted shrink wrap product bundling
US11873151B1 (en) * 2021-09-30 2024-01-16 Michael Frankis Customizable product package and a method of forming the same
US20250248900A1 (en) * 2021-11-10 2025-08-07 Syntegon Technology Gmbh Device for sealing capsules

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112607133A (zh) * 2020-12-04 2021-04-06 宁波大学 一种用于电池热缩包装的方法
CN114435648B (zh) * 2022-03-01 2023-03-24 擎安物流科技(溧阳)有限公司 一种可循环利用的电池包装运输用包装工具及其使用方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1062349A (en) * 1965-03-17 1967-03-22 Ici Ltd Apparatus and method for packaging articles in heat shrinkable wrappers
US3389478A (en) * 1966-03-03 1968-06-25 Anderson Electric Corp Apparatus for thermally conditioning articles and the like
DE1561984B1 (de) * 1967-07-26 1972-01-20 Hans Beck Beheizbarer Schrumpftunnel
DE2533148A1 (de) * 1974-07-31 1976-02-12 Situno Holding Sa Erhitzungskanal
WO2002036436A1 (en) * 2000-11-01 2002-05-10 Claude Andrew Neagle Adaptable packaging machine heat shrink tunnel
EP2105383A1 (de) * 2008-03-26 2009-09-30 Multivac Sepp Haggenmüller GmbH & Co. KG Verpackungsmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1062349A (en) * 1965-03-17 1967-03-22 Ici Ltd Apparatus and method for packaging articles in heat shrinkable wrappers
US3389478A (en) * 1966-03-03 1968-06-25 Anderson Electric Corp Apparatus for thermally conditioning articles and the like
DE1561984B1 (de) * 1967-07-26 1972-01-20 Hans Beck Beheizbarer Schrumpftunnel
DE2533148A1 (de) * 1974-07-31 1976-02-12 Situno Holding Sa Erhitzungskanal
WO2002036436A1 (en) * 2000-11-01 2002-05-10 Claude Andrew Neagle Adaptable packaging machine heat shrink tunnel
EP2105383A1 (de) * 2008-03-26 2009-09-30 Multivac Sepp Haggenmüller GmbH & Co. KG Verpackungsmaschine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3118128A1 (de) * 2015-07-16 2017-01-18 Krones Aktiengesellschaft Schrumpfvorrichtung
DE102018132737A1 (de) * 2018-12-18 2020-06-18 Krones Aktiengesellschaft Verfahren und Schrumpftunnel zum Aufschrumpfen thermoplastischen Verpackungsmaterials auf Artikel
FR3090591A1 (fr) * 2018-12-20 2020-06-26 C.E.R.M.E.X. Constructions Etudes et Recherches de Matériels pour l'Emballage d'Expédition Dispositif de conditionnement par fardelage et son procédé
CN109693839A (zh) * 2019-01-28 2019-04-30 张兴宇 一种热缩膜布卷包装机
US11873151B1 (en) * 2021-09-30 2024-01-16 Michael Frankis Customizable product package and a method of forming the same
US20250248900A1 (en) * 2021-11-10 2025-08-07 Syntegon Technology Gmbh Device for sealing capsules
WO2023147271A1 (en) * 2022-01-26 2023-08-03 The Procter & Gamble Company Infrared-assisted shrink wrap product bundling
US11970303B2 (en) 2022-01-26 2024-04-30 The Procter & Gamble Company Infrared-assisted shrink wrap product bundling

Also Published As

Publication number Publication date
WO2014075918A3 (en) 2014-07-03
WO2014075918A2 (en) 2014-05-22

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