EP2354014A1 - Vorrichtung und Verfahren zur Herstellung von mindestens einer in einer Hülle aus wärmeschrumpfendem Material gewickelten Mehrfachverpackung, zusammengesetzt aus einer Vielzahl von Verpackungen - Google Patents

Vorrichtung und Verfahren zur Herstellung von mindestens einer in einer Hülle aus wärmeschrumpfendem Material gewickelten Mehrfachverpackung, zusammengesetzt aus einer Vielzahl von Verpackungen Download PDF

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Publication number
EP2354014A1
EP2354014A1 EP10152437A EP10152437A EP2354014A1 EP 2354014 A1 EP2354014 A1 EP 2354014A1 EP 10152437 A EP10152437 A EP 10152437A EP 10152437 A EP10152437 A EP 10152437A EP 2354014 A1 EP2354014 A1 EP 2354014A1
Authority
EP
European Patent Office
Prior art keywords
sheet
packages
batch
heat
oven
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Withdrawn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
EP10152437A
Other languages
English (en)
French (fr)
Inventor
Sergio Resca
Christian Piccinini
Antonio Meschiari
Giuseppe Bignami
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 EP10152437A priority Critical patent/EP2354014A1/de
Publication of EP2354014A1 publication Critical patent/EP2354014A1/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Withdrawn legal-status Critical Current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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/08—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path
    • B65B11/10—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents
    • 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

Definitions

  • the present invention relates to a unit and to a method for manufacturing at least one multi-pack comprising a plurality of packages wrapped in a sheet of heat-shrinkable material.
  • 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 for stiffness and strength, 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 for stiffness and strength 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 and shrink-wrapped, so as to form a multi-pack.
  • a unit for manufacturing of multi-packs is arranged downstream from the folding station.
  • the unit substantially comprises:
  • the unit comprises:
  • the wrapping station is arranged upstream from the oven and substantially comprises:
  • the film is transversally cut along the second direction and fed to the conveyor, which moves the film and batches along the third direction and at the same speed.
  • the longitudinal cutter cuts the film parallel to the third direction so as to form two sheets of heat-shrinkable material which wrap respective batches and have respective longitudinal edges adjacent one another. Subsequently, the dividing rod separates such longitudinal edges, so dividing the two sheets of heat-shrinkable material from one another.
  • the path of the bars comprises a work portion along which bars move in the same direction of batches and wrap such batches, and a return portion along which bars move opposite to the batches.
  • bars move along return portion below conveyor, engage a transversal edge of the portion of the film intended to wrap the multi-packs and overlap such portion onto the packages of the batches.
  • a first portion of the respective sheet is interposed between conveyor and the bottom walls of the packages of the respective batch, while a second portion is arranged on the opposite side of corresponding first portion.
  • First and second portion of each sheet comprise:
  • Batches also comprise:
  • Oven receives and heats the batches wrapped with relative sheets, so causing the heat-shrinking of the heat-shrinkable material and completing the formation of the multi-packs. More precisely, the hot air circulating in the oven shrinks the end areas of first portion and second portions respectively upwards and downwards within the oven, so as to partially wrap also the second lateral walls of the batches.
  • a unit for manufacturing at least one multi-pack comprising a plurality of packages wrapped in a sheet of heat-shrinkable material, as claimed in Claim 1.
  • the present invention also relates to a method for manufacturing at least one multi-pack comprising a plurality of packages wrapped in a sheet of heat-shrinkable material, as claimed in Claim 8.
  • the present invention further relates to a unit for manufacturing at least a first and a second multi-pack each comprising a plurality of packages wrapped in a sheet of heat-shrinkable material, as claimed in Claim 12.
  • the present invention finally relates to a method for manufacturing at least a first and a second multi-pack each comprising a plurality of packages wrapped in a sheet of heat-shrinkable material, as claimed in Claim 15.
  • Number 1 in Figure 1 indicates as a whole a unit for manufacturing a plurality, two in the embodiment shown, of multi-packs 2a, 2b. More precisely, each multi-pack 2a, 2b comprises a respective plurality of packages 3a, 3b, three in the embodiment shown, of a product which is pourable within a tube (not shown) of packaging material.
  • Packages 3a, 3b are, in the embodiment shown, parallelepiped-shaped and sealed.
  • Each package 3a, 3b substantially comprises ( Figure 5 )):
  • Packages 3a, 3b preferably contain a pourable food product, such as pasteurized or UHT milk, fruit juice, wine, etc.
  • Packages 3a, 3b may also contain a food product, which is pourable within a tube of packaging material when producing packages 3a, 3b, and sets after packages 3a, 3b are sealed.
  • a food product is a portion of cheese, which is melted when producing packages 3a, 3b and sets after packages 3a, 3b are sealed.
  • the tube is formed in known manner upstream from unit 1 by longitudinally folding and sealing a known film (not shown) of heat-seal sheet material, which comprises a layer of paper material covered on both sides with layers of heat-seal plastic material, e.g. polyethylene.
  • the packaging material comprises a layer of oxygen-barrier material, e.g. aluminium foil, which is superimposed on one or more layers of heat-seal plastic material eventually forming the inner face of package 3a, 3b, 3c, 3d contacting the food product.
  • the tube of packaging material is then filled with the food product for packaging, and is sealed and cut along equally spaced cross sections to form a number of pillow packs (not shown), which are then transferred to a folding unit where they are folded mechanically to form respective packages 3a, 3b.
  • packages 3a, 3b are transferred along two rows to unit 1.
  • the rows advance packages 3a, 3b parallel to one another.
  • Unit 1 substantially comprises:
  • directions A, B are respectively orthogonal to walls 6, 7 of packages 3a, 3b which are advancing onto conveyor.
  • Each batch 10a, 10b comprises a pair of lateral packages 3a, 3b and a central package 3a, 3b, which is interposed between lateral packages 3a, 3b.
  • unit 1 comprises:
  • unit 1 comprises:
  • Rollers 27a, 27b drive film 22 along a path P which extends from storage 20 to conveyor 25.
  • path P comprise an ascending end portion P 1 on the side of conveyor 25.
  • Two pair of rollers 27b are arranged at end portion P 1 .
  • Longitudinal cutter 26 is arranged upstream from rollers 27c with reference to an advancing direction of film 22 along path P.
  • Longitudinal cutter 26 is also arranged upstream from transversal cutter 31 with reference to the advancing sense of film 22 along path P.
  • Transversal cutter 19 is interposed between the pairs of rollers 27b and cuts sheets 23, 24 along respective edges 29, which extend orthogonally to direction P and in the same plane of film 22.
  • Wrapping assembly 15 comprises a plurality of bars 30 (only one of which is shown in Figures 2 to 4 ) extending along direction A, and movable along a path S (only shown in Figures 2 to 4 ) having a work portion S 1 parallel to direction B and a return portion S 2 .
  • bars 30 move below conveyor 25 and in the opposite sense of conveyor 25.
  • bars 30 move above conveyor 25 and in the same sense of such conveyor 25.
  • the speed of bars 30 is greater than the speed at which batches 10a, 10b are advanced by conveyor 25.
  • Each bar 30 engages transversal edges 29 of webs 28 at an end of return portion S 2 , and folds sheets 23, 24 over batches 10a, 10b.
  • wrapping assembly 15 has wrapped batches 10a, 10b with respective sheets 23, 24, walls 6 of lateral packages remain unwrapped; and portions 34a, 34b of respective sheets 23, 24 are interposed between conveyor 25 and walls 5 of packages 3a, 3b of corresponding batches 10.
  • each portion 31a, 31b; 34a, 34b comprises a respective main area 35a, 35b; 36a, 36b which cooperates with respective walls 4, 5 of packages 3a, 3b of corresponding batches 10a, 10b.
  • Each portions 31a, 31b; 34a, 34b further comprises a pair of end areas 37a, 37b; 38a, 38b which protrudes on opposite sides of respective main areas 35a, 35b; 36a, 36b.
  • end areas 37a, 37b; 38a, 38b lie on the same horizontal plane of corresponding main areas 35a, 35b; 36a, 36b.
  • End areas 37b of sheets 23, 24 are adjacent to one another and are interposed between end areas 37a.
  • Portions 32a, 32b; 33a, 33b of respective sheets 23, 24 comprise:
  • End areas 41b, 42b are adjacent to one another and interposed between corresponding end areas 41a, 42a.
  • Unit 1 advantageously comprises pre-heating means 50 arranged upstream from oven 16 with reference to an advancing direction of batches 10a, 10b from wrapping assembly 15 towards oven 16; pre-heating means 50 are adapted to pre-shrink sheets 23, 24.
  • pre-heating means 50 are blowing means for blowing towards end areas 37a, 37b of sheets 23, 24 a current of a hot gas, air in the example shown.
  • hot gas means in the present description that the gas is blown at a temperature ranging between 400°C and 500°C.
  • temperature at which air is blown towards end areas 37a, 37b ranges between 450°C and 500°C.
  • a still more preferred value of the temperature at which air is blown towards end areas 37a, 37b is 450°C.
  • Blowing means comprise a plurality, three in the embodiment shown, of nozzles 51, 52, 53 (shown farther away from oven 16 than they are for sake of clarity), which are arranged over conveyor 43 and batches 10a, 10b travelling onto conveyor 25, and direct air downwards and towards end areas 37a, 37b of sheets 23, 24.
  • Nozzles 51, 52, 53 are aligned along direction A and nozzle 52 is interposed between nozzles 51, 53 along direction A.
  • nozzle 51 directs a first jet of air towards end area 37a of sheet 23
  • nozzle 52 directs a second jet of air towards end areas 37b of sheets 23
  • nozzle 53 directs a third jet of air towards end area 37a of sheet 24.
  • nozzles 51, 52, 53 form separating means for separating sheets 23, 24 from one another along respective longitudinal edges and before that batches 10a, 10b reach oven 16.
  • nozzles 51, 52, 53 separate sheets 23, 24 regardless of the temperature at which they blow the gas.
  • unit 1 will be hereinafter described with reference to only one pair of batches 10a, 10b, which are formed by respective plurality, three in the embodiment shown, of packages 3a, 3b and to only one bar 30 of wrapping assembly 15.
  • Packages 3a, 3b are formed upstream from unit 1, and are subsequently transferred in two rows to such unit 1.
  • the separating assembly separates batches 10a, 10b from the rest of respective rows and the aligning assembly aligns packages 3a, 3b along direction A.
  • Aligned packages 3a, 3b advance at first onto conveyor 18 and are then transferred to conveyor 25.
  • film 22 is wound off from reel 21 and is moved along path P by rollers 27a, 27b, 27c.
  • Longitudinal cutter 26 cuts film 22 parallel to path P, so as to form webs 28 of film 22. More precisely, once film 22 has been cut by longitudinal cutter 26, webs 28 have respective longitudinal edges parallel to path P adjacent one another. In particular, sheets 23, 24 are intended to wrap respective batches 10a, 10b.
  • webs 28 are cut orthogonally to path P and along edges 29 by transversal cutter 19. More precisely, cutter 19 separates sheets 23, 24 from the remaining portion of film 22.
  • Sheets 23, 24 are transferred to conveyor 25. More precisely, sheets 23, 24 are interposed between conveyor 25 and bottom walls 5 of packages 3a, 3b of batches 10a, 10b ( Figure 1 ).
  • Bar 30 moves along path S at a speed which is greater than the speed at which packages 3a, 3b and sheets 23, 24 travel onto conveyor 25.
  • bar 30 grips edges 29 of sheets 23, 24 at the end of portion S 2 of path S and folds sheets 23, 24 over batches 10a, 10b as it move along portion S 1 of path S ( Figure 2 ).
  • Bar 30 folds portions 32a, 32b and 33a, 33b over opposite walls 7 of packages 3a, 3b of corresponding batches 10a, 10b; and folds portions 31a, 31b of respective sheets 23, 24 over walls 4 of packages 3a, 3b of corresponding batches 10a, 10b ( Figure 3 ).
  • portions 34a, 34b of respective sheets 23, 24 are interposed between conveyor 25 and walls 5 of packages 3a, 3b of corresponding batches 10a, 10b; and walls 6 of lateral packages 3a, 3b of corresponding batches 10a, 10b do not cooperate with the heat-shrinkable material of sheets 23, 24.
  • main areas 35a, 35b; 36a, 36b of respective portions 31a, 31b; 34a, 34b are led to contact respective walls 4, 5 of packages 3a, 3b by bar 30.
  • End areas 37a, 37b; 38a, 38b of respective portions 31a, 31b; 34a, 34b are arranged by bar 30 in such a position that they protrude on opposite sides of respective main areas 35a, 35b; 36a, 36b.
  • bar 30 arranges end areas 37a, 37b; 38a, 38b substantially on the same plane of main area 35a, 35b; 36a, 36b.
  • End area 37b of sheet 23 is arranged by bar 30 adjacent to end area 37b of sheet 24. End areas 37b are interposed between end areas 37a.
  • Main areas 39a, 39b; 40a, 40b of portions 32a, 32b; 33a, 33b are led to contact respective walls 7 of packages 3a, 3b by bar 30.
  • End areas 41a, 41b; 42a, 42b of portions 32a, 32b; 33a, 33b are arranged by bar 30 in such a position that they protrude on relative opposite sides of corresponding main portions 39a, 39b; 40a, 40b and are vertically interposed between end areas 37a, 37b; 38a, 38b.
  • end areas 41b, 42b are adjacent to one another and interposed between respectively end areas 41a, 42a.
  • conveyor 25 feeds wrapped batches 10a, 10b to conveyor 43.
  • Nozzle 51 directs the first jet of air towards end area 37a of sheet 23
  • nozzle 52 directs the second jet of air towards end areas 37b of sheets 23, 24, and nozzle 53 directs the third jet of air towards end area 37b of sheet 24. More precisely, the temperature of air jets ranges from 400 and 500 °C.
  • end areas 37a, 37b of portions 31a, 31b of sheets 23, 24 pre-shrink, and bend downwards and towards wall 6 of lateral packages 2a, 2b.
  • the air ejected by nozzles 51, 52, 53 pre-shrinks sheets 23, 24 around the corners between walls 4, 6 of lateral packages 3a, 3b of batches 10a, 10b.
  • nozzles 52 separate end area 37b of sheet 23 from end area 37b of sheet 24 before that batches 10a, 10b reach oven 16.
  • batches 10a, 10b enter oven 16.
  • the hot air present within oven 16 cause the complete heat-shrinking of sheets 23, 24 onto batches 10a, 10b, so completing the formation of multi-packs 2a, 2b.
  • the air ejected by nozzles 51, 52, 53 pre-shrink bends end areas 37a, 37b of portions 31a, 31b of sheets 23, 24 before that batches 10a, 10b reach oven 16.
  • end areas 37a, 37b bend downwards and towards walls 6 of lateral packages 2a, 2b.
  • end areas 37a, 37b are arranged in the correct shrinking position with respect to wall 6 before that batches 10a, 10b reach oven 16.
  • unit 1 could manufacture only one multi-pack 2a, 2b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
EP10152437A 2010-02-02 2010-02-02 Vorrichtung und Verfahren zur Herstellung von mindestens einer in einer Hülle aus wärmeschrumpfendem Material gewickelten Mehrfachverpackung, zusammengesetzt aus einer Vielzahl von Verpackungen Withdrawn EP2354014A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10152437A EP2354014A1 (de) 2010-02-02 2010-02-02 Vorrichtung und Verfahren zur Herstellung von mindestens einer in einer Hülle aus wärmeschrumpfendem Material gewickelten Mehrfachverpackung, zusammengesetzt aus einer Vielzahl von Verpackungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10152437A EP2354014A1 (de) 2010-02-02 2010-02-02 Vorrichtung und Verfahren zur Herstellung von mindestens einer in einer Hülle aus wärmeschrumpfendem Material gewickelten Mehrfachverpackung, zusammengesetzt aus einer Vielzahl von Verpackungen

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EP2354014A1 true EP2354014A1 (de) 2011-08-10

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EP10152437A Withdrawn EP2354014A1 (de) 2010-02-02 2010-02-02 Vorrichtung und Verfahren zur Herstellung von mindestens einer in einer Hülle aus wärmeschrumpfendem Material gewickelten Mehrfachverpackung, zusammengesetzt aus einer Vielzahl von Verpackungen

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102653321A (zh) * 2011-03-04 2012-09-05 克罗内斯股份公司 用于待以包装膜和/或热收缩膜包裹的物品集的包装模块
IT201600124781A1 (it) * 2016-12-12 2018-06-12 Baumer Srl Metodo per imballare
IT201600124800A1 (it) * 2016-12-12 2018-06-12 Baumer Srl Sistema di macchina imballatrice

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727324A (en) * 1970-09-18 1973-04-17 Despatch Ind Inc Shrink tunnel for palletized loads
GB1382842A (en) * 1972-03-16 1975-02-05 Iwema Forpacknings Ab Package with handle and a method and a machine for the manufacture of said package
US3869844A (en) * 1972-09-04 1975-03-11 Lara Sa Methods of and devices for continuously packaging articles in thermoshrinkable plastics film
EP0630811A1 (de) * 1993-05-17 1994-12-28 Tetra Laval Holdings & Finance SA Methode und Vorrichtung für Schrumpffolienverpackung von einem oder mehreren Waren
EP1013551A2 (de) * 1998-12-22 2000-06-28 BAUMER S.r.l. Verfahren und Vorrichtung zum Verpacken von Gegenständen mit einer wärmeschrumpfbaren Folie
JP2003054520A (ja) * 2001-08-08 2003-02-26 Fuji Seal Inc オーバーシュリンク包装方法及び包装装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727324A (en) * 1970-09-18 1973-04-17 Despatch Ind Inc Shrink tunnel for palletized loads
GB1382842A (en) * 1972-03-16 1975-02-05 Iwema Forpacknings Ab Package with handle and a method and a machine for the manufacture of said package
US3869844A (en) * 1972-09-04 1975-03-11 Lara Sa Methods of and devices for continuously packaging articles in thermoshrinkable plastics film
EP0630811A1 (de) * 1993-05-17 1994-12-28 Tetra Laval Holdings & Finance SA Methode und Vorrichtung für Schrumpffolienverpackung von einem oder mehreren Waren
EP1013551A2 (de) * 1998-12-22 2000-06-28 BAUMER S.r.l. Verfahren und Vorrichtung zum Verpacken von Gegenständen mit einer wärmeschrumpfbaren Folie
JP2003054520A (ja) * 2001-08-08 2003-02-26 Fuji Seal Inc オーバーシュリンク包装方法及び包装装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102653321A (zh) * 2011-03-04 2012-09-05 克罗内斯股份公司 用于待以包装膜和/或热收缩膜包裹的物品集的包装模块
IT201600124781A1 (it) * 2016-12-12 2018-06-12 Baumer Srl Metodo per imballare
IT201600124800A1 (it) * 2016-12-12 2018-06-12 Baumer Srl Sistema di macchina imballatrice
EP3333091A1 (de) * 2016-12-12 2018-06-13 Baumer S.r.l. Verfahren zum umhüllen von gegenständen
EP3333092A1 (de) * 2016-12-12 2018-06-13 Baumer S.r.l. Umwicklungsmaschine

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