EP2539143B1 - Method for producing a large-capacity, pliable container, inner protective envelope produced by said method and method for producing an inner protective enveloppe - Google Patents

Method for producing a large-capacity, pliable container, inner protective envelope produced by said method and method for producing an inner protective enveloppe Download PDF

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Publication number
EP2539143B1
EP2539143B1 EP11712638.3A EP11712638A EP2539143B1 EP 2539143 B1 EP2539143 B1 EP 2539143B1 EP 11712638 A EP11712638 A EP 11712638A EP 2539143 B1 EP2539143 B1 EP 2539143B1
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EP
European Patent Office
Prior art keywords
lateral
inner protective
producing
section
protective envelope
Prior art date
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EP11712638.3A
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German (de)
French (fr)
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EP2539143A1 (en
Inventor
Jacques Basconnet
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.)
Tisza Textil Packaging SAS
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Tisza Textil Packaging SAS
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Priority to PL11712638T priority Critical patent/PL2539143T3/en
Priority to SI201130696T priority patent/SI2539143T1/en
Publication of EP2539143A1 publication Critical patent/EP2539143A1/en
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Publication of EP2539143B1 publication Critical patent/EP2539143B1/en
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Classifications

    • 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
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/12—Supports
    • B65D90/20—Frames or nets, e.g. for flexible containers
    • B65D90/205—Frames or nets, e.g. for flexible containers for flexible containers, i.e. the flexible container being permanently connected to the frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • 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
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/04—Linings
    • B65D90/046—Flexible liners, e.g. loosely positioned in the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • 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
    • B65D2590/00—Component parts, details or accessories for large containers
    • B65D2590/02—Wall construction
    • B65D2590/04—Linings
    • B65D2590/043—Flexible liners
    • B65D2590/046—Bladders

Definitions

  • the invention relates to a method of manufacturing a flexible container of large capacity, and an internal protective envelope obtained during this process.
  • They include an internal protective envelope intended to be inserted into an outer envelope. See for example the document BE 1001225A6 .
  • the packaging consisting of two inner and outer envelopes, is disposable after use, which ensures its perfect cleanliness since it is used only once. This feature avoids the risk of contamination, unlike rigid reusable containers that should be washed, sanitized, identified.
  • the unit cost of use is much lower in the end and eliminates the risk of mixing between two lots.
  • the known outer shells are made of a woven polymeric material such as polypropylene, for example, which is a strong material, allowing the outer sheath to withstand a load of from a few tens of kilograms to over 500 kg.
  • the different elements of the outer envelope are obtained by cutting and are assembled by sewing.
  • the internal protective envelope commonly known as “liner” must be one hundred percent waterproof. Its function is to protect the contents of the flexible container from its environment (humidity, odor, light, gas).
  • the internal protective envelope is made of a polymer material, such as polyethylene, for example. It can also be made from more noble materials such as laminated complexes based on aluminum, polyamide or technical plastics giving it more specific properties.
  • the materials used and the methods of manufacturing the internal protection casings must meet the standards of the pharmaceutical industry, and in particular the constraints concerning cleanliness, the absence of pollution and the absence of germs.
  • the inner protective casing is assembled with the outer casing to form the flexible container of large capacity.
  • the large capacity flexible containers 2 of the prior art as illustrated in FIG. figure 1 , have a parallelepiped shape with a square section.
  • the flexible containers 2 are intended to be inserted in a metal frame 2a and supported by it.
  • the square-section parallelepiped shape of the flexible containers limits their use to square-section metal frames.
  • the usual folding methods limit the shape of the sections to square shapes.
  • the object of the invention is to propose a method of manufacturing a flexible container of large capacity of rectangular section that also makes it possible to avoid pollution of the inside of the internal protective envelope during its manufacture.
  • the invention also relates to an internal protection envelope obtained during the method of manufacturing an internal protective envelope as defined above, as well as to the method of manufacturing said inner envelope.
  • the inner protective envelope has a parallelepipedal shape of rectangular section and comprises a chute of substantially square section on its upper and lower faces.
  • the invention provides a method for manufacturing a rectangular parallelepiped shaped large capacity flexible container without polluting the interior of the internal protective envelope.
  • the rectangular shape of the internal protective envelope is obtained without intervention within it.
  • Rectangular Inner Protection Envelopes meet an industry need in which the majority of metal frames, and used storage racks have a rectangular section.
  • the method of manufacturing a flexible container of high capacity 2 comprises a step a) of obtaining a tubular jacket with bellows by an extrusion / blowing process comprising a fold forming operation.
  • the gusseted tubular sheath is in the form of a folded sheath folded after step a).
  • the method of manufacturing a flexible container of high capacity 2 comprises a step b) of cutting a portion of the bellows tubular sheath to obtain a folded bellows sheath 1a, as shown in FIG. figure 2 .
  • This bent folded sheath 1a is made of polymer material, preferably polyethylene.
  • Folded bellow duct 1a has a rectangular shape. It comprises two opposite open ends 4a, 4b, and two lateral folding zones 5a, 5b separated by a central longitudinal axis 6.
  • Each lateral folding zone 5a, 5b comprises three fold lines 7a, 7b, 7c including an inner fold line 7b extending along and near the central longitudinal axis 6, and two outer fold lines 7a, 7c .
  • each lateral fold zone 5a, 5b forms a bellows having three folds, one of which is a central fold.
  • the inner folding lines 7b of the two lateral folding zones 5a, 5b are contiguous.
  • the two lateral folding zones 5a, 5b are symmetrical with respect to the central longitudinal axis 6.
  • the method of manufacturing a flexible container of large capacity 2 comprises a step c) of cutting the lateral fold zones 5a, 5b, at the corners 8 of the folded bellows sheath 1a to obtain a folded bellows sheath 1a having two narrowed portions 9a, 9b at its open ends 4a, 4b, as shown in FIG. figure 3 .
  • Each of the narrowed portions 9a, 9b is delimited by two cut lateral edges 10a, 10b each comprising a stack of four cutting edges 11.
  • the number of cutting edges 11 is related to the number of folds or fold lines. Indeed, three fold lines correspond to four layers stacked on each other to form a bellows. Cutting the four stacked layers results in the formation of four cutting edges 11.
  • the step c) of cutting the lateral zones of folding comprises, for each lateral folding zone 5a, 5b, two cutting operations making it possible to obtain two cuts symmetrical with respect to the central longitudinal axis 6.
  • Each cutting operation is carried along a first oblique cutting line 18 with respect to the central longitudinal axis 6 and along a second cutting line 19 parallel to the central longitudinal axis 6.
  • the narrowed portions 9a, 9b have a flared rectangle shape.
  • the method of manufacturing a flexible container of large capacity 2 comprises a step d) of welding the cutting edges 11 adjacent to each other, for each of the cut side edges.
  • the cutting and welding steps are preferably performed simultaneously.
  • a parallelepipedal internal protective envelope of square section 1 b comprising a chute 12a, 12b of square section at its upper ends 23a and lower 23b is obtained, as illustrated in FIG. figure 5 .
  • the internal protective envelope comprises a filler neck 1a at the upper end 23a of the inner protective envelope, and a discharge chute 12b at the lower end 23b of the inner protective envelope.
  • the internal protective envelope of square section 1b extends in the lower and upper part by a frustoconical portion 32 of pyramidal section having four faces 33.
  • Each frustoconical portion 32 is terminated by one of the troughs 12a, 12b whose reduced section allows adapt the product flow to the constraints of the receiving equipment.
  • Each frustoconical portion 32 connects one of the chutes 12a, 12b to the rest of the internal protective envelope.
  • the two chutes 12a, 12b may have identical dimensions, in particular the same height and faces of the same width.
  • they Preferably, they have heights and faces of different widths, as shown in FIG. figure 5 .
  • the chutes 12a, 12b may have a rectangular section.
  • the trough 12a positioned at the upper end 23a of the inner protective envelope of square section 1b has a height greater than the trough 12b positioned at the lower end 23b of the inner protective cover of square section 1 b. It also has a wider section, that is to say, faces of greater width.
  • the welding is done by thermo-welding.
  • the cutting edges 11 of the cut lateral edges 10a, 10b are all welded to each other so as to form a bellows.
  • Each lateral folding zone 5a, 5b again comprises three fold lines 7a, 7b, 7c, including an inner fold line 7b extending along and near the central longitudinal axis 6, and two outer fold lines 7a. , 7c.
  • the outer fold lines 7a, 7c are each formed of a central portion 24a parallel to the central longitudinal axis 6, of two oblique portions 24b forming an angle with the central longitudinal axis 6, disposed on each side of the central portion 24a, and two lateral portions 24c parallel to the central longitudinal axis 6.
  • the method of manufacturing a flexible container of large capacity 2 comprises a step e) of bonding fastening lugs 13 on two opposite lateral attachment faces 14a, 14b of the folded bellows sheath 1a.
  • Each of these lateral fixing faces 14a, 14b comprises at least four fixing lugs 13.
  • Step e) of bonding the fastening lugs 13 is performed when the tubular gusseted sheath is folded.
  • fastening lugs 13 are glued to each of the lateral fastening faces 14a, 14b of the folded bellows sheath 1a, as illustrated in FIGS. figures 4 and 5 .
  • the fastening tabs 13 are adjacent to the four corners 25 of the lateral fixing faces 14a, 14b.
  • the fastening lugs 13 are adhesive fastening lugs having the shape of a T, and made of a reinforced flexible material.
  • the fastening lugs 13 may be glued to the lateral edges 21 of the square section internal protection envelope 1a. Their number may be greater than four.
  • the method of manufacturing a flexible container of large capacity 2 comprises a step f) of applying a tensile force on the fastening tabs 13 to deform by stretching the parallelepipedal internal protective envelope of square section 1 b, and obtain a parallelepipedal internal protective envelope of rectangular section 1, as shown in FIG. figure 6 .
  • the rectangular section inner protection envelope 1 comprises four lateral faces whose two lateral fixing faces 14a, 14b, and two opposite rectangularly elongated lateral faces 15a, 15b, each having an upper edge 16a, a lower edge 16b, and two outer side pockets 17a, 17b respectively extending along the upper edges 16a and lower 16a.
  • the two outer side pockets 17a, 17b are generated by stretching the stretched lateral faces 15a, 15b opposite.
  • the adhesion of the fastening lugs 13 to the internal protective envelope must be sufficient so that the fastening lugs 13 do not detach during step f).
  • the stretching is performed until the desired shape for the internal protective envelope is obtained.
  • the traction forces are applied simultaneously on all the fastening lugs 13.
  • the upper faces 23a and 23b of the inner protective envelope are also stretched and have a rectangular shape.
  • the chutes 12a, 12b substantially keep a square section.
  • the stretching is done manually or mechanically from outside the internal protective envelope, without risk of pollution inside the internal protective envelope.
  • the method of manufacturing a flexible container of large capacity 2 comprises a step g) of welding the outer side pockets 17a, 17b to isolate them from the rest of the internal protective envelope of rectangular section 1, and a step h) of cutting the outer side pockets 17a, 17b to remove them from the two stretched side faces 15a, 15b.
  • Steps g) and h) are performed outside the internal protective envelope, avoiding any risk of pollution inside the internal protective envelope.
  • An internal protective envelope of rectangular section 1 is obtained without external lateral pockets 17a, 17b, as illustrated on FIG. figure 7 .
  • the welding steps d) and g) are carried out by thermo-welding.
  • the cutting steps b), c) and h) are performed ultrasonically to prevent smoke generation and the use of extractor hoods.
  • the cutting steps b), c) and h) can be performed by a hot blade technique (350 ° C).
  • the method of manufacturing a flexible container of large capacity 2 comprises a step B) of assembling the rectangular section 1 internal protection envelope with the outer envelope 3 to form the flexible container of large capacity 2, as shown on the figure 8 .
  • the outer casing 3 is manufactured by assembling five panels including an upper panel 26, two small side panels 27, and two panels. These panels are made of polymer materials, such as polypropylene, for example.
  • Each small surface side panel 27 includes a square or rectangular top portion 27a.
  • Each large-area side panel 28 includes a rectangular upper portion 28a.
  • Each side panel 27, 28 comprises an intermediate portion 27b, 28b intended to form a lower frustoconical portion 30 for the outer envelope 3.
  • Each side panel 27, 28 comprises a lower part 27c, 28c intended to form a discharge chute 31 for the outer envelope 3.
  • the outer envelope 3 is formed by sewing the panels 26, 27, 28 which are positioned around the internal protective envelope of rectangular section 1, so as to integrate it in the outer shell 3.
  • the outer envelope 3 is sewn around the inner protective envelope of rectangular section 1.
  • the fastening lugs 13 are integrated into the seams making it possible to assemble the panels 26, 27, 28 of the outer envelope 3, and pass through the outer envelope 3 through locations 20.
  • the internal protective envelope of rectangular section 1 is thus secured to the outer shell 3 by means of the fixing lugs 13.
  • the inner protective envelope of rectangular section 1 is deployed in the outer casing 3 so that it matches its shape.
  • the eight fastening lugs 13 of the rectangular section 1 internal protection envelope are associated with eight locations 20, as shown in FIG. figure 9 .
  • the fastening lugs 13 of the rectangular section internal protection envelope 1 are positioned on the lateral edges 21 of the rectangular section internal protection envelope 1.
  • the locations 20 of the outer envelope 3 are positioned on the lateral edges 22 of the outer casing 3 to face the fixing lugs 13, and to ensure that the entire volume of the inner protective casing 1 is deployed in the outer casing 3.
  • the side panels 27, 28 are sewn together first to form an outer shell body.
  • the upper panel 26 is then sewn on the upper part of the body of the outer casing.
  • the upper panel 26 comprises a flat portion 37 surmounted by a filler neck 38 of cylindrical shape, with a circular or oblong section. It can also be of parallelepipedal shape.
  • the filler neck 12a of the inner protective casing 1 is intended to partially emerge through this filler neck 38 of the outer casing 3.
  • the upper panel 26 comprises fixing slots 34 distributed around its periphery.
  • the flexible container of large capacity 2 is intended to be inserted in a metal frame 2a which serves as a supporting structure, as shown in FIG. figure 10 , which gives the unit a format easily integrated in standard storage racks, and adaptable to the different filling and emptying equipment of the pharmaceutical industry.
  • the fixing slots 34 of the upper panel 26 of the outer shell 3 are inserted into pins 35 projecting from the upper edge of the metal frame 2a.
  • the manufacturing method of the invention thus makes it possible to manufacture flexible containers of large capacity 2 of rectangular parallelepiped shape without polluting the inside of the internal protective envelope 1.
  • the flexible containers of large capacity 2 may have a rectangular section of 68 x 108 mm, for example, and be housed in metal frames of 79 x 119 mm.

Description

L'invention concerne un procédé de fabrication d'un conteneur souple de grande capacité, et une enveloppe de protection interne obtenue au cours de ce procédé.The invention relates to a method of manufacturing a flexible container of large capacity, and an internal protective envelope obtained during this process.

Les conteneurs souples de grande capacité sont utilisés dans l'industrie pharmaceutique ou l'industrie chimique, par exemple.Large capacity flexible containers are used in the pharmaceutical or chemical industry, for example.

Ils sont destinés à contenir des produits semi-ouvrés et des produits finis sous forme solide comme des poudres, des granulés, des comprimés, ou des gélules, par exemple.They are intended to contain semi-finished products and finished products in solid form such as powders, granules, tablets, or capsules, for example.

Ils sont en en matière plastique et présentent des capacités allant de 100 L à 600 L.They are made of plastic and have capacities ranging from 100 L to 600 L.

Ils comprennent une enveloppe de protection interne destinée à être insérée dans une enveloppe externe. Voir par exemple le document BE 1001225A6 .They include an internal protective envelope intended to be inserted into an outer envelope. See for example the document BE 1001225A6 .

L'emballage, constitué des deux enveloppes interne et externe, est jetable après usage, ce qui permet de garantir sa parfaite propreté puisqu'il n'est utilisé qu'une seule fois. Cette caractéristique évite les risques de contamination, contrairement aux conteneurs rigides réutilisables qu'il convient de laver, aseptiser, identifier. Le coût unitaire d'utilisation est beaucoup plus faible au final et permet de s'affranchir du risque de mélange entre deux lots.The packaging, consisting of two inner and outer envelopes, is disposable after use, which ensures its perfect cleanliness since it is used only once. This feature avoids the risk of contamination, unlike rigid reusable containers that should be washed, sanitized, identified. The unit cost of use is much lower in the end and eliminates the risk of mixing between two lots.

Les enveloppes externes connues sont constituées d'un matériau polymère tissé comme le polypropylène, par exemple, qui est un matériau résistant, permettant à l'enveloppe externe de supporter une charge pouvant aller de quelques dizaines de kilogrammes à plus de 500 kg.The known outer shells are made of a woven polymeric material such as polypropylene, for example, which is a strong material, allowing the outer sheath to withstand a load of from a few tens of kilograms to over 500 kg.

Les différents éléments de l'enveloppe externe sont obtenus par découpage et sont assemblés par couture.The different elements of the outer envelope are obtained by cutting and are assembled by sewing.

L'enveloppe de protection interne, appelée communément sache ou « liner », doit être cent pour cent étanche. Elle a pour fonction de protéger le contenu du conteneur souple de son environnement (humidité, odeur, lumière, gaz).The internal protective envelope, commonly known as "liner", must be one hundred percent waterproof. Its function is to protect the contents of the flexible container from its environment (humidity, odor, light, gas).

L'enveloppe de protection interne est réalisée en matériau polymère, comme en polyéthylène, par exemple. Elle peut aussi être réalisée à partir de matériaux plus nobles comme les complexes laminés à base d'aluminium, de polyamide ou de matières plastiques techniques lui conférant des propriétés plus spécifiques.The internal protective envelope is made of a polymer material, such as polyethylene, for example. It can also be made from more noble materials such as laminated complexes based on aluminum, polyamide or technical plastics giving it more specific properties.

Les matériaux utilisés et les méthodes de fabrication des enveloppes de protection interne doivent répondre aux normes de l'industrie pharmaceutique, et en particulier aux contraintes concernant de la propreté, l'absence de pollution et l'absence de germes.The materials used and the methods of manufacturing the internal protection casings must meet the standards of the pharmaceutical industry, and in particular the constraints concerning cleanliness, the absence of pollution and the absence of germs.

L'enveloppe de protection interne est assemblée avec l'enveloppe externe pour former le conteneur souple de grande capacité.The inner protective casing is assembled with the outer casing to form the flexible container of large capacity.

Les conteneurs souples de grande capacité 2 de l'art antérieur, comme illustrés sur la figure 1, présentent une forme parallélépipédique avec une section carrée.The large capacity flexible containers 2 of the prior art, as illustrated in FIG. figure 1 , have a parallelepiped shape with a square section.

Les conteneurs souples 2 sont destinés à être insérés dans un cadre métallique 2a et supportés par celui-ci.The flexible containers 2 are intended to be inserted in a metal frame 2a and supported by it.

La forme parallélépipédique à section carrée des conteneurs souples limite leur utilisation à des cadres métalliques de section carrée.The square-section parallelepiped shape of the flexible containers limits their use to square-section metal frames.

Hors, la majorité des racks de stockage utilisée dans l'industrie pharmaceutique, par exemple, est configurée pour recevoir des conteneurs de section rectangulaire.Out of this, the majority of storage racks used in the pharmaceutical industry, for example, are configured to accommodate containers of rectangular section.

L'insertion d'un conteneur souple de section carrée dans un cadre métallique de section rectangulaire entraîne une perte de volume de stockage.The insertion of a flexible container of square section in a metal frame of rectangular section causes a loss of storage volume.

Il existe donc un besoin de conteneurs souples ayant une section rectangulaire pour augmenter les capacités de stockage et pouvoir les utiliser dans des cadres métalliques à section rectangulaire qui sont largement utilisés dans l'industrie.There is therefore a need for flexible containers having a rectangular section to increase the storage capacities and to be able to use them in metal frames with rectangular section which are widely used in the industry.

Néanmoins, de tels conteneurs souples avec une section rectangulaire sont difficiles à fabriquer.Nevertheless, such flexible containers with a rectangular section are difficult to manufacture.

En effet, les procédés de fabrication de l'art antérieur ne permettent pas d'obtenir une enveloppe de protection interne avec une section rectangulaire.Indeed, the manufacturing methods of the prior art do not make it possible to obtain an internal protective envelope with a rectangular section.

De telles enveloppes de protection interne de section rectangulaire ne peuvent être obtenues avec les seules opérations de pliage, découpe et soudage habituellement utilisées dans ce secteur.Such internal protection envelopes of rectangular section can not be obtained with the only folding operations, cutting and welding usually used in this sector.

En particulier, ces opérations ne permettent pas d'obtenir des enveloppes de protection interne de section rectangulaire ayant des goulottes de section carrée.In particular, these operations do not make it possible to obtain internal protection envelopes of rectangular section having chutes of square section.

Les méthodes de pliages habituelles limitent la forme des sections à des formes carrées.The usual folding methods limit the shape of the sections to square shapes.

Ainsi, l'invention a pour objet de proposer un procédé de fabrication d'un conteneur souple de grande capacité de section rectangulaire permettant en plus d'éviter la pollution de l'intérieur de l'enveloppe de protection interne lors de sa fabrication.Thus, the object of the invention is to propose a method of manufacturing a flexible container of large capacity of rectangular section that also makes it possible to avoid pollution of the inside of the internal protective envelope during its manufacture.

A cet effet, l'invention concerne un procédé de fabrication d'un conteneur souple de grande capacité comprenant une enveloppe de protection interne en matière plastique destinée à être insérée dans une enveloppe externe, ledit procédé comprenant les étapes successives suivantes :

  1. A) fabrication de l'enveloppe de protection interne par :
    1. a) obtention d'une gaine tubulaire à soufflets par un procédé d'extrusion/soufflage comportant une opération de formation de plis sur la gaine tubulaire à soufflets, ladite gaine tubulaire à soufflets se présentant sous une forme pliée après l'étape a),
    2. b) découpage d'une portion de la gaine tubulaire à soufflets pour obtenir une gaine à soufflets pliée présentant une forme rectangulaire, ladite gaine à soufflets pliée comprenant deux extrémités ouvertes opposées, et deux zones latérales de pliage, séparées par un axe longitudinal central, chaque zone latérale de pliage comprenant trois lignes de pliages, dont une ligne de pliage intérieure s'étendant le long et à proximité de l'axe longitudinal central, et deux lignes de pliage extérieures,
    3. c) découpage des zones latérales de pliage, au niveau des quatre angles de la gaine à soufflets pliée de façon à obtenir une gaine à soufflets pliée ayant deux parties rétrécies à ses extrémités ouvertes, chacune desdites parties rétrécies étant délimitée par deux bordures latérales découpées comprenant chacune un empilement de quatre arêtes de découpe,
    4. d) soudage des arêtes de découpe adjacentes les unes aux autres, pour chacune desdites bordures latérales découpées, de façon à obtenir, lorsque la gaine à soufflets pliée est dépliée, une enveloppe de protection interne parallélépipédique de section carrée comprenant une goulotte de section carrée à ses extrémités supérieure et inférieure, et
    5. e) collage de pattes de fixation sur deux faces latérales de fixation opposées de la gaine à soufflets pliée, chacune de ces faces latérales de fixation comprenant au moins quatre pattes de fixation.
    Selon l'invention, le procédé comprend les étapes suivantes :
    • f) application d'une force de traction sur les pattes de fixation pour déformer par étirement l'enveloppe de protection interne parallélépipédique de section carrée et obtenir une enveloppe de protection interne parallélépipédique de section rectangulaire, ladite enveloppe de protection interne de section rectangulaire comprenant quatre faces latérales dont les deux faces latérales de fixation, et deux faces latérales étirées opposées de forme rectangulaire comportant chacune un bord supérieur, un bord inférieur, et deux poches latérales externes s'étendant respectivement le long desdits bords supérieur et inférieur,
    • g) soudage des poches latérales externes pour les isoler du reste de l'enveloppe de protection interne de section rectangulaire,
    • h) découpage des poches latérales externes pour les retirer des deux faces latérales étirées,
  2. B) assemblage de l'enveloppe de protection interne de section rectangulaire avec l'enveloppe externe pour former ledit conteneur souple de grande capacité.
To this end, the invention relates to a method of manufacturing a flexible container of large capacity comprising an inner plastic protective envelope intended to be inserted into an outer envelope, said method comprising the following successive steps:
  1. A) manufacture of the internal protection envelope by:
    1. a) obtaining a bellows tubular sheath by an extrusion blow molding process comprising a pleat forming operation on the bellows tubular sheath, said bellows tubular sheath being in folded form after step a),
    2. b) cutting a portion of the bellows tubular sheath to provide a folded bellows sheath having a rectangular shape, said folded bellows sheath having two opposed open ends, and two folded lateral zones separated by a central longitudinal axis, each lateral folding zone comprising three fold lines, including an inner fold line extending along and near the central longitudinal axis, and two outer fold lines,
    3. c) cutting the lateral fold zones, at the four corners of the folded bellows duct so as to obtain a folded bellows duct having two narrowed portions at its open ends, each of said narrowed portions being delimited by two cut lateral edges comprising each a stack of four cutting edges,
    4. d) welding cutting edges adjacent to each other, for each of said cut side edges, so as to obtain, when the folded bellows sheath is unfolded, a parallelepipedal internal protection envelope of square section comprising a square section chute to its upper and lower extremities, and
    5. e) bonding fastening tabs on two opposite lateral fixing faces of the folded bellows sheath, each of these lateral fastening faces comprising at least four fastening tabs.
    According to the invention, the method comprises the following steps:
    • f) application of a tensile force on the fastening tabs to deform by stretching the parallelepiped internal protection envelope of square section and to obtain a parallelepipedal internal protection envelope of rectangular section, said inner protective envelope of rectangular section comprising four lateral faces whose two lateral faces of attachment, and two opposite rectangularly shaped lateral faces each having an upper edge, a lower edge, and two outer side pockets respectively extending along said upper and lower edges,
    • g) welding the outer side pockets to isolate them from the rest of the rectangular section internal protection envelope,
    • h) cutting the outer side pockets to remove them from the two stretched lateral faces,
  2. B) assembling the rectangular section inner protection envelope with the outer envelope to form said flexible container of large capacity.

Dans différents modes de réalisation possibles, la présente invention concerne également les caractéristiques suivantes qui pourront être considérées isolément ou selon toutes leurs combinaisons techniquement possibles et apportent chacune des avantages spécifiques :

  • lors de l'étape e) de collage des pattes de fixation, quatre pattes de fixation sont collées sur chacune des faces latérales de fixation de la gaine à soufflets pliée, lesdites pattes de fixation étant adjacentes aux quatre coins des faces latérales de fixation,
  • les pattes de fixation sont des pattes de fixation adhésives présentant la forme d'un T,
  • l'étape c) de découpage des zones latérales de pliage comprend, pour chaque zone latérale de pliage, deux opérations de découpages permettant d'obtenir deux découpes symétriques par rapport à l'axe longitudinal central, chaque opération de découpage étant réalisée suivant une première ligne de découpe oblique par rapport à l'axe longitudinal central et selon une deuxième ligne de découpe parallèle à l'axe longitudinal central,
  • les étapes de découpage b), c) et h) sont réalisée par ultrasons ou au moyen d'une lame chaude,
  • les étapes de soudure d) et g) sont réalisées par thermo-soudage,
  • l'étape g) de soudage des poches latérales externes est réalisée à l'extérieure de l'enveloppe de protection interne,
  • l'enveloppe externe comprenant plusieurs panneaux en matériau polymère dont un panneau supérieur, deux panneaux latéraux de petite surface, et deux panneaux latéraux de grande surface, lors de l'étape d'assemblage B),
  • l'enveloppe externe est formée par couture desdits panneaux autour de l'enveloppe de protection interne de section rectangulaire, de façon à intégrer celle-ci dans l'enveloppe externe, les pattes de fixation de l'enveloppe de protection interne de section rectangulaire étant intégrées dans les coutures formées entre lesdits panneaux,
  • les pattes de fixation sont positionnées sur les arêtes latérales de l'enveloppe de protection interne de section rectangulaire, lesdites pattes de fixation traversant l'enveloppe externe au niveau des arêtes latérales de cette dernière.
In various possible embodiments, the present invention also relates to the following features which may be considered individually or in all their technically possible combinations and each bring specific advantages:
  • during step e) of gluing the fastening lugs, four fastening lugs are glued to each of the lateral attachment faces of the folded bellows sheath, said fastening lugs being adjacent to the four corners of the lateral fastening faces,
  • the fixing lugs are adhesive fastening lugs having the shape of a T,
  • step c) of cutting the lateral zones of folding comprises, for each lateral folding zone, two cutting operations to obtain two cuts symmetrical with respect to the central longitudinal axis, each cutting operation being carried out according to a first cutting line oblique with respect to the central longitudinal axis and along a second cutting line parallel to the central longitudinal axis,
  • the cutting steps b), c) and h) are carried out by ultrasound or by means of a hot blade,
  • the welding steps d) and g) are carried out by thermo-welding,
  • step g) of welding the external side pockets is performed outside the internal protective envelope,
  • the outer casing comprising a plurality of panels of polymeric material, including an upper panel, two small side panels, and two large area side panels, during the assembly step B),
  • the outer casing is formed by sewing said panels around the internal protective envelope of rectangular section, so as to integrate it into the outer casing, the fastening lugs of the inner protective envelope of rectangular section being embedded in the seams formed between said panels,
  • the fastening tabs are positioned on the lateral edges of the rectangular section of internal protection envelope, said fastening tabs passing through the outer envelope at the lateral edges of the latter.

L'invention concerne également une enveloppe de protection interne obtenue au cours du procédé de fabrication d'une enveloppe de protection interne tel que défini précédemment, ainsi que le procédé de fabrication de ladite enveloppe interne. L'enveloppe de protection interne présente une forme parallélépipédique de section rectangulaire et comprend une goulotte de section sensiblement carrée sur ses faces supérieure et inférieure.The invention also relates to an internal protection envelope obtained during the method of manufacturing an internal protective envelope as defined above, as well as to the method of manufacturing said inner envelope. The inner protective envelope has a parallelepipedal shape of rectangular section and comprises a chute of substantially square section on its upper and lower faces.

Ainsi, l'invention fournit un procédé pour fabriquer un conteneur souple de grande capacité de forme parallélépipédique rectangulaire sans polluer l'intérieur de l'enveloppe de protection interne.Thus, the invention provides a method for manufacturing a rectangular parallelepiped shaped large capacity flexible container without polluting the interior of the internal protective envelope.

La forme rectangulaire de l'enveloppe de protection interne est obtenue sans intervention à l'intérieure de celle-ci.The rectangular shape of the internal protective envelope is obtained without intervention within it.

Les enveloppes de protection interne de section rectangulaire répondent à un besoin de l'industrie dans laquelle la majorité des cadres métalliques, et des racks de stockage utilisés ont une section rectangulaire.The Rectangular Inner Protection Envelopes meet an industry need in which the majority of metal frames, and used storage racks have a rectangular section.

L'invention sera décrite plus en détail en référence aux dessins annexés dans lesquels :

  • la figure 1 représente un conteneur souple de section carré de l'art antérieur monté dans un cadre métallique ;
  • la figure 2 représente une gaine à soufflets pliée, selon un mode de réalisation de l'invention ;
  • la figure 3 représente une gaine à soufflets pliée avec deux parties rétrécies à ses extrémités, obtenue après une étape c) de découpage et une étape d) de soudage des arêtes de découpe, selon un mode de réalisation de l'invention ;
  • la figure 4 représente une gaine à soufflets pliée, obtenue après une étape e) décollage de patte de maintiens sur deux faces latérales de fixation opposées de la gaine à soufflets pliée, selon un mode de réalisation de l'invention ;
  • la figure 5 représente une enveloppe de protection interne de section carrée ;
  • la figure 6 représente une enveloppe de protection interne de section carrée, pendant une étape f) d'application d'une force de traction sur les pattes de fixation pour obtenir une enveloppe de protection interne de section rectangulaire, selon un mode de réalisation de l'invention ;
  • la figure 7 représente cette enveloppe de protection interne de section rectangulaire, obtenue après les étapes g) de soudage et h) de coupage des poches latérales externes, selon un mode de réalisation de l'invention ;
  • la figure 8 représente une partie de l'étape B) d'assemblage de l'enveloppe de protection interne de section rectangulaire avec l'enveloppe externe pour former un conteneur souple de grande capacité ;
  • la figure 9 représente un conteneur souple de grande capacité de section rectangulaire obtenu par le procédé de l'invention ;
  • la figure 10 représente ce conteneur souple de section rectangulaire monté dans un cadre métallique.
The invention will be described in more detail with reference to the accompanying drawings in which:
  • the figure 1 represents a flexible container of square section of the prior art mounted in a metal frame;
  • the figure 2 represents a folded bellows sheath according to one embodiment of the invention;
  • the figure 3 represents a folded bellows sheath with two narrowed portions at its ends, obtained after a cutting step c) and a step d) of welding the cutting edges, according to one embodiment of the invention;
  • the figure 4 represents a bent folded duct, obtained after a step e) take off of the support tab on two lateral faces of opposing fastening of the folded bellows sleeve according to one embodiment of the invention;
  • the figure 5 represents a square section internal protection envelope;
  • the figure 6 represents a square section internal protection envelope, during a step f) of applying a tensile force on the fixing lugs to obtain an inner protective envelope of rectangular section, according to one embodiment of the invention;
  • the figure 7 represents this internal protection envelope of rectangular section, obtained after the steps g) of welding and h) of cutting the outer side pockets, according to one embodiment of the invention;
  • the figure 8 represents a part of step B) of assembling the rectangular section inner protection envelope with the outer envelope to form a flexible container of large capacity;
  • the figure 9 represents a flexible container of large capacity of rectangular section obtained by the method of the invention;
  • the figure 10 represents this flexible container of rectangular section mounted in a metal frame.

Le procédé de fabrication d'un conteneur souple de grande capacité 2 comprend une étape a) d'obtention d'une gaine tubulaire à soufflets par un procédé d'extrusion/soufflage comportant une opération de formation de plis. La gaine tubulaire à soufflets se présente sous la forme d'une gaine à soufflets pliée après l'étape a).The method of manufacturing a flexible container of high capacity 2 comprises a step a) of obtaining a tubular jacket with bellows by an extrusion / blowing process comprising a fold forming operation. The gusseted tubular sheath is in the form of a folded sheath folded after step a).

Le procédé de fabrication d'un conteneur souple de grande capacité 2 comprend une étape b) de découpage d'une portion de la gaine tubulaire à soufflets pour obtenir une gaine à soufflets pliée 1 a, comme représenté sur la figure 2.The method of manufacturing a flexible container of high capacity 2 comprises a step b) of cutting a portion of the bellows tubular sheath to obtain a folded bellows sheath 1a, as shown in FIG. figure 2 .

Cette gaine à soufflets pliée 1 a est en matériau polymère, de préférence en polyéthylène.This bent folded sheath 1a is made of polymer material, preferably polyethylene.

Elle peut aussi être réalisée à partir de matériaux plus nobles comme les complexes laminés à base d'aluminium, de polyamide ou de matières plastiques techniques lui conférant des propriétés plus spécifiques.It can also be made from more noble materials such as laminated complexes based on aluminum, polyamide or technical plastics giving it more specific properties.

La gaine à soufflets pliée 1 a présente une forme rectangulaire. Elle comprend deux extrémités ouvertes 4a, 4b opposées, et deux zones latérales de pliage 5a, 5b, séparées par un axe longitudinal central 6.Folded bellow duct 1a has a rectangular shape. It comprises two opposite open ends 4a, 4b, and two lateral folding zones 5a, 5b separated by a central longitudinal axis 6.

Chaque zone latérale de pliage 5a, 5b comprend trois lignes de pliages 7a, 7b, 7c dont une ligne de pliage intérieure 7b s'étendant le long et à proximité de l'axe longitudinal central 6, et deux lignes de pliage extérieures 7a, 7c.Each lateral folding zone 5a, 5b comprises three fold lines 7a, 7b, 7c including an inner fold line 7b extending along and near the central longitudinal axis 6, and two outer fold lines 7a, 7c .

Dit autrement, chaque zone latérale de pliage 5a, 5b forme un soufflet ayant trois plis dont un pli central.In other words, each lateral fold zone 5a, 5b forms a bellows having three folds, one of which is a central fold.

Les lignes de pliage intérieures 7b des deux zones latérales de pliage 5a, 5b sont contiguës. Les deux zones latérales de pliage 5a, 5b sont symétriques par rapport à l'axe longitudinal central 6.The inner folding lines 7b of the two lateral folding zones 5a, 5b are contiguous. The two lateral folding zones 5a, 5b are symmetrical with respect to the central longitudinal axis 6.

Le procédé de fabrication d'un conteneur souple de grande capacité 2 comprend une étape c) de découpage des zones latérales de pliage 5a, 5b, au niveau des angles 8 de la gaine à soufflets pliée 1a permettant d'obtenir une gaine à soufflets pliée 1a ayant deux parties rétrécies 9a, 9b à ses extrémités ouvertes 4a, 4b, comme représentée sur la figure 3.The method of manufacturing a flexible container of large capacity 2 comprises a step c) of cutting the lateral fold zones 5a, 5b, at the corners 8 of the folded bellows sheath 1a to obtain a folded bellows sheath 1a having two narrowed portions 9a, 9b at its open ends 4a, 4b, as shown in FIG. figure 3 .

Chacune des parties rétrécies 9a, 9b est délimitée par deux bordures latérales découpées 10a, 10b comprenant chacune un empilement de quatre arêtes de découpe 11.Each of the narrowed portions 9a, 9b is delimited by two cut lateral edges 10a, 10b each comprising a stack of four cutting edges 11.

Le nombre d'arêtes de découpe 11 est lié au nombre de plis ou de lignes de pliage. En effet, trois lignes de pliage correspondent à quatre couches empilées les unes sur les autres pour former un soufflet. La découpe des quatre couches empilées entraîne la formation de quatre arêtes de découpe 11.The number of cutting edges 11 is related to the number of folds or fold lines. Indeed, three fold lines correspond to four layers stacked on each other to form a bellows. Cutting the four stacked layers results in the formation of four cutting edges 11.

Chaque zone latérale de pliage 5a, 5b ou chaque soufflet ayant deux lignes de pliage extérieures 7a, 7c, il y a deux découpes à réaliser pour chaque angle 8 de la gaine à soufflets. En fait, il y a en tout huit parties situées dans les angles de la portion de gaine tubulaire à soufflets qui sont découpées de manière à obtenir des étranglements aux extrémités.Each lateral folding zone 5a, 5b or each bellows having two outer fold lines 7a, 7c, there are two cuts to be made for each angle 8 of the bellows duct. In fact, there are altogether eight portions located in the corners of the bellows tubular duct portion that are cut to obtain constrictions at the ends.

L'étape c) de découpage des zones latérales de pliage comprend, pour chaque zone latérale de pliage 5a, 5b, deux opérations de découpages permettant d'obtenir deux découpes symétriques par rapport à l'axe longitudinal central 6. Chaque opération de découpage est réalisée suivant une première ligne de découpe oblique 18 par rapport à l'axe longitudinal central 6 et selon une deuxième ligne de découpe 19 parallèle à l'axe longitudinal central 6.The step c) of cutting the lateral zones of folding comprises, for each lateral folding zone 5a, 5b, two cutting operations making it possible to obtain two cuts symmetrical with respect to the central longitudinal axis 6. Each cutting operation is carried along a first oblique cutting line 18 with respect to the central longitudinal axis 6 and along a second cutting line 19 parallel to the central longitudinal axis 6.

Les chutes 36 ou parties découpées non utilisées sont retirées.Falls 36 or unused cut parts are removed.

Les parties rétrécies 9a, 9b présentent une forme de rectangle évasé.The narrowed portions 9a, 9b have a flared rectangle shape.

Le procédé de fabrication d'un conteneur souple de grande capacité 2 comprend une étape d) de soudage des arêtes de découpe 11 adjacentes les unes aux autres, pour chacune des bordures latérales découpées.The method of manufacturing a flexible container of large capacity 2 comprises a step d) of welding the cutting edges 11 adjacent to each other, for each of the cut side edges.

Les étapes de découpage et de soudage sont préférentiellement réalisées simultanément.The cutting and welding steps are preferably performed simultaneously.

On obtient, lorsque la gaine à soufflets pliée 1 a est dépliée, une enveloppe de protection interne parallélépipédique de section carrée 1 b comprenant une goulotte 12a, 12b de section carrée à ses extrémités supérieure 23a et inférieure 23b, comme illustré sur la figure 5.When the folded bellows sleeve 1 a is unfolded, a parallelepipedal internal protective envelope of square section 1 b comprising a chute 12a, 12b of square section at its upper ends 23a and lower 23b is obtained, as illustrated in FIG. figure 5 .

L'enveloppe de protection interne comprend une goulotte de remplissage 1 a à l'extrémité supérieure 23a de l'enveloppe de protection interne, et une goulotte de vidage 12b à l'extrémité inférieure 23b de l'enveloppe de protection interne.The internal protective envelope comprises a filler neck 1a at the upper end 23a of the inner protective envelope, and a discharge chute 12b at the lower end 23b of the inner protective envelope.

L'enveloppe de protection interne de section carrée 1 b se prolonge en partie basse et haute par une portion tronconique 32 de section pyramidale présentant quatre faces 33. Chaque portion tronconique 32 est terminée par une des goulottes 12a, 12b dont la section réduite permet d'adapter le flux du produit aux contraintes du matériel de réception. Chaque portion tronconique 32 relie une des goulottes 12a, 12b au reste de l'enveloppe de protection interne.The internal protective envelope of square section 1b extends in the lower and upper part by a frustoconical portion 32 of pyramidal section having four faces 33. Each frustoconical portion 32 is terminated by one of the troughs 12a, 12b whose reduced section allows adapt the product flow to the constraints of the receiving equipment. Each frustoconical portion 32 connects one of the chutes 12a, 12b to the rest of the internal protective envelope.

Les goulottes deux 12a, 12b peuvent présenter des dimensions identiques, en particulier la même hauteur et des faces de même largeur.The two chutes 12a, 12b may have identical dimensions, in particular the same height and faces of the same width.

De préférence, elles présentent des hauteurs et des faces de largeurs différentes, comme représenté sur la figure 5.Preferably, they have heights and faces of different widths, as shown in FIG. figure 5 .

Alternativement, les goulottes 12a, 12b peuvent avoir une section rectangulaire.Alternatively, the chutes 12a, 12b may have a rectangular section.

Sur la figure 5, la goulotte 12a positionnée à l'extrémité supérieure 23a de l'enveloppe de protection interne de section carrée 1 b présente une hauteur plus grande que la goulotte 12b positionnée à l'extrémité inférieure 23b de l'enveloppe de protection interne de section carrée 1 b. Elle présente également une section plus large, c'est-à-dire des faces de largeur plus grande.On the figure 5 , the trough 12a positioned at the upper end 23a of the inner protective envelope of square section 1b has a height greater than the trough 12b positioned at the lower end 23b of the inner protective cover of square section 1 b. It also has a wider section, that is to say, faces of greater width.

La soudure est réalisée par thermo-soudage.The welding is done by thermo-welding.

Chaque zone latérale de pliage 5a, 5b ou chaque soufflet ayant deux lignes de pliage extérieures 7a, 7c découpées, il y a deux soudures à réaliser pour chaque bordure latérale découpée 10a, 10b de la gaine à soufflets.Each lateral folding zone 5a, 5b or each bellows having two outer fold lines 7a, 7c cut, there are two welds to be made for each cut side edge 10a, 10b of the bellows sleeve.

Les arêtes de découpe 11 des bordures latérales découpées 10a, 10b sont toutes soudées les unes aux autres de façon à reformer un soufflet.The cutting edges 11 of the cut lateral edges 10a, 10b are all welded to each other so as to form a bellows.

Chaque zone latérale de pliage 5a, 5b comprend à nouveau trois lignes de pliages 7a, 7b, 7c dont une ligne de pliage intérieure 7b s'étendant le long et à proximité de l'axe longitudinal central 6, et deux lignes de pliage extérieures 7a, 7c.Each lateral folding zone 5a, 5b again comprises three fold lines 7a, 7b, 7c, including an inner fold line 7b extending along and near the central longitudinal axis 6, and two outer fold lines 7a. , 7c.

Les lignes de pliage extérieures 7a, 7c sont chacune formées d'une partie centrale 24a parallèle à l'axe longitudinal central 6, de deux parties obliques 24b formant un angle avec l'axe longitudinal central 6, disposées de chaque côté de la partie centrale 24a, et de deux parties latérales 24c parallèles à l'axe longitudinal central 6.The outer fold lines 7a, 7c are each formed of a central portion 24a parallel to the central longitudinal axis 6, of two oblique portions 24b forming an angle with the central longitudinal axis 6, disposed on each side of the central portion 24a, and two lateral portions 24c parallel to the central longitudinal axis 6.

Le procédé de fabrication d'un conteneur souple de grande capacité 2 comprend une étape e) de collage de pattes de fixation 13 sur deux faces latérales de fixation 14a, 14b opposées de la gaine à soufflets pliée 1 a. Chacune de ces faces latérales de fixation 14a, 14b comprend au moins quatre pattes de fixation 13.The method of manufacturing a flexible container of large capacity 2 comprises a step e) of bonding fastening lugs 13 on two opposite lateral attachment faces 14a, 14b of the folded bellows sheath 1a. Each of these lateral fixing faces 14a, 14b comprises at least four fixing lugs 13.

L'étape e) de collage des pattes de fixation 13 est réalisée lorsque la gaine tubulaire à soufflets est pliée.Step e) of bonding the fastening lugs 13 is performed when the tubular gusseted sheath is folded.

De manière préférée, quatre pattes de fixation 13 sont collées sur chacune des faces latérales de fixation 14a, 14b de la gaine à soufflets pliée 1 a, comme illustré sur les figures 4 et 5.Preferably, four fastening lugs 13 are glued to each of the lateral fastening faces 14a, 14b of the folded bellows sheath 1a, as illustrated in FIGS. figures 4 and 5 .

Les pattes de fixation 13 sont adjacentes aux quatre coins 25 des faces latérales de fixation 14a, 14b.The fastening tabs 13 are adjacent to the four corners 25 of the lateral fixing faces 14a, 14b.

Les pattes de fixation 13 sont des pattes de fixation adhésives présentant la forme d'un T, et réalisée en une matière souple renforcée.The fastening lugs 13 are adhesive fastening lugs having the shape of a T, and made of a reinforced flexible material.

Alternativement, les pattes de fixation 13 peuvent être collées sur les arêtes latérales 21 de l'enveloppe de protection interne de section carrée 1 a. Leur nombre peut être supérieur à quatre.Alternatively, the fastening lugs 13 may be glued to the lateral edges 21 of the square section internal protection envelope 1a. Their number may be greater than four.

Le procédé de fabrication d'un conteneur souple de grande capacité 2 comprend une étape f) d'application d'une force de traction sur les pattes de fixation 13 pour déformer par étirement l'enveloppe de protection interne parallélépipédique de section carrée 1 b, et obtenir une enveloppe de protection interne parallélépipédique de section rectangulaire 1, comme représentée sur la figure 6.The method of manufacturing a flexible container of large capacity 2 comprises a step f) of applying a tensile force on the fastening tabs 13 to deform by stretching the parallelepipedal internal protective envelope of square section 1 b, and obtain a parallelepipedal internal protective envelope of rectangular section 1, as shown in FIG. figure 6 .

L'enveloppe de protection interne de section rectangulaire 1 comprend quatre faces latérales dont les deux faces latérales de fixation 14a, 14b, et deux faces latérales étirées 15a, 15b opposées de forme rectangulaire comportant chacune un bord supérieur 16a, un bord inférieur 16b, et deux poches latérales externes 17a, 17b s'étendant respectivement le long des bords supérieur 16a et inférieur 16a.The rectangular section inner protection envelope 1 comprises four lateral faces whose two lateral fixing faces 14a, 14b, and two opposite rectangularly elongated lateral faces 15a, 15b, each having an upper edge 16a, a lower edge 16b, and two outer side pockets 17a, 17b respectively extending along the upper edges 16a and lower 16a.

Les deux poches latérales externes 17a, 17b sont générées par l'étirement des faces latérales étirées 15a, 15b opposées.The two outer side pockets 17a, 17b are generated by stretching the stretched lateral faces 15a, 15b opposite.

L'adhérence des pattes de fixation 13 sur l'enveloppe de protection interne doit être suffisante pour que les pattes de fixation 13 ne se décollent pas pendant l'étape f).The adhesion of the fastening lugs 13 to the internal protective envelope must be sufficient so that the fastening lugs 13 do not detach during step f).

L'étirement est réalisé jusqu'à l'obtention de la forme voulue pour l'enveloppe de protection interne.The stretching is performed until the desired shape for the internal protective envelope is obtained.

Avantageusement, les forces de traction sont appliquées simultanément sur toutes les pattes de fixation 13.Advantageously, the traction forces are applied simultaneously on all the fastening lugs 13.

Les faces supérieure 23a et inférieure 23b de l'enveloppe de protection interne sont également été étirées et présentent une forme rectangulaire.The upper faces 23a and 23b of the inner protective envelope are also stretched and have a rectangular shape.

Après déformation, les goulottes 12a, 12b gardent sensiblement une section carrée.After deformation, the chutes 12a, 12b substantially keep a square section.

L'étirement est réalisé manuellement ou mécaniquement depuis l'extérieur de l'enveloppe de protection interne, sans risque de pollution à l'intérieur de l'enveloppe de protection interne.The stretching is done manually or mechanically from outside the internal protective envelope, without risk of pollution inside the internal protective envelope.

Le procédé de fabrication d'un conteneur souple de grande capacité 2 comprend une étape g) de soudage des poches latérales externes 17a, 17b pour les isoler du reste de l'enveloppe de protection interne de section rectangulaire 1, et une étape h) de découpage des poches latérales externes 17a, 17b pour les retirer des deux faces latérales étirées 15a, 15b.The method of manufacturing a flexible container of large capacity 2 comprises a step g) of welding the outer side pockets 17a, 17b to isolate them from the rest of the internal protective envelope of rectangular section 1, and a step h) of cutting the outer side pockets 17a, 17b to remove them from the two stretched side faces 15a, 15b.

Les étapes g) et h) sont réalisées à l'extérieur de l'enveloppe de protection interne, évitant tout risque de pollution à l'intérieur de l'enveloppe de protection interne.Steps g) and h) are performed outside the internal protective envelope, avoiding any risk of pollution inside the internal protective envelope.

On obtient une enveloppe de protection interne de section rectangulaire 1 sans poches latérales externes 17a, 17b, comme illustrée sur la figure 7.An internal protective envelope of rectangular section 1 is obtained without external lateral pockets 17a, 17b, as illustrated on FIG. figure 7 .

Les étapes de soudure d) et g) sont réalisées par thermo-soudage.The welding steps d) and g) are carried out by thermo-welding.

Les étapes de découpage b), c) et h) sont réalisées par ultrasons pour éviter un dégagement de fumées et l'utilisation de hottes aspirantes. Alternativement, les étapes de découpage b), c) et h) peuvent être réalisées par une technique à lame chaude (350 °C).The cutting steps b), c) and h) are performed ultrasonically to prevent smoke generation and the use of extractor hoods. Alternatively, the cutting steps b), c) and h) can be performed by a hot blade technique (350 ° C).

Le procédé de fabrication d'un conteneur souple de grande capacité 2 comprend une étape B) d'assemblage de l'enveloppe de protection interne de section rectangulaire 1 avec l'enveloppe externe 3 pour former le conteneur souple de grande capacité 2, comme représenté sur la figure 8.The method of manufacturing a flexible container of large capacity 2 comprises a step B) of assembling the rectangular section 1 internal protection envelope with the outer envelope 3 to form the flexible container of large capacity 2, as shown on the figure 8 .

L'enveloppe externe 3 est fabriquée par l'assemblage de cinq panneaux dont un panneau supérieur 26, deux panneaux latéraux de petite surface 27, et deux panneaux latéraux de grande surface 28. Ces panneaux sont en matériaux polymère, comme en polypropylène par exemple.The outer casing 3 is manufactured by assembling five panels including an upper panel 26, two small side panels 27, and two panels. These panels are made of polymer materials, such as polypropylene, for example.

Chaque panneau latéral de petite surface 27 comprend une partie supérieure carrée ou rectangulaire 27a. Chaque panneau latéral de grande surface 28 comprend une partie supérieure rectangulaire 28a.Each small surface side panel 27 includes a square or rectangular top portion 27a. Each large-area side panel 28 includes a rectangular upper portion 28a.

Chaque panneau latéral 27, 28 comprend une partie intermédiaire 27b, 28b destinée à former une portion tronconique inférieure 30 pour l'enveloppe externe 3.Each side panel 27, 28 comprises an intermediate portion 27b, 28b intended to form a lower frustoconical portion 30 for the outer envelope 3.

Chaque panneau latéral 27, 28 comprend une partie inférieure 27c, 28c destinées à former une goulotte de vidage 31 pour l'enveloppe externe 3.Each side panel 27, 28 comprises a lower part 27c, 28c intended to form a discharge chute 31 for the outer envelope 3.

Lors de l'étape d'assemblage B), l'enveloppe externe 3 est formée par couture des panneaux 26, 27, 28 qui sont positionnés autour de l'enveloppe de protection interne de section rectangulaire 1, de façon à intégrer celle-ci dans l'enveloppe externe 3.During the assembly step B), the outer envelope 3 is formed by sewing the panels 26, 27, 28 which are positioned around the internal protective envelope of rectangular section 1, so as to integrate it in the outer shell 3.

Dit autrement, l'enveloppe externe 3 est cousue autour de l'enveloppe de protection interne de section rectangulaire 1.In other words, the outer envelope 3 is sewn around the inner protective envelope of rectangular section 1.

Les pattes de fixation 13 sont intégrées dans les coutures permettant d'assembler les panneaux 26, 27, 28 de l'enveloppe externe 3, et traversent l'enveloppe externe 3 par des emplacements 20.The fastening lugs 13 are integrated into the seams making it possible to assemble the panels 26, 27, 28 of the outer envelope 3, and pass through the outer envelope 3 through locations 20.

L'enveloppe de protection interne de section rectangulaire 1 est ainsi rendue solidaire de l'enveloppe externe 3 par l'intermédiaire des pattes de fixation 13.The internal protective envelope of rectangular section 1 is thus secured to the outer shell 3 by means of the fixing lugs 13.

L'enveloppe de protection interne de section rectangulaire 1 est déployée dans l'enveloppe externe 3 pour qu'elle épouse sa forme. Les huit pattes de fixation 13 de l'enveloppe de protection interne de section rectangulaire 1 sont associés à huit emplacements 20, comme représenté sur la figure 9.The inner protective envelope of rectangular section 1 is deployed in the outer casing 3 so that it matches its shape. The eight fastening lugs 13 of the rectangular section 1 internal protection envelope are associated with eight locations 20, as shown in FIG. figure 9 .

De manière préférée, les pattes de fixation 13 de l'enveloppe de protection interne de section rectangulaire 1 sont positionnées sur les arêtes latérales 21 de l'enveloppe de protection interne de section rectangulaire 1. Les emplacements 20 de l'enveloppe externe 3 sont positionnés sur les arêtes latérales 22 de l'enveloppe externe 3 pour être en face des pattes de fixation 13, et faire en sorte que tout le volume de l'enveloppe de protection interne 1 soit déployé dans l'enveloppe externe 3.Preferably, the fastening lugs 13 of the rectangular section internal protection envelope 1 are positioned on the lateral edges 21 of the rectangular section internal protection envelope 1. The locations 20 of the outer envelope 3 are positioned on the lateral edges 22 of the outer casing 3 to face the fixing lugs 13, and to ensure that the entire volume of the inner protective casing 1 is deployed in the outer casing 3.

Ces moyens de fixation ne remettent pas en cause l'étanchéité de l'enveloppe de protection interne 1 et garantissent une parfaite cohérence des formes des deux enveloppes 1, 3. Ceci est très important lorsqu'il s'agit de conditionner des médicaments car le vidage de l'enveloppe de protection interne 1 doit être total sans qu'il ne soit nécessaire d'intervenir à l'intérieur pour faciliter la chute des dernières pièces contenues.These fixing means do not call into question the tightness of the inner protective envelope 1 and ensure a perfect coherence of the shapes of the two envelopes 1, 3. This is very important when it comes to packaging drugs because the emptying of the internal protection casing 1 must be total without that it is necessary to intervene inside to facilitate the fall of the last contained parts.

Les panneaux latéraux 27, 28 sont assemblés par couture en premier pour former un corps d'enveloppe externe. Le panneau supérieur 26 est ensuite cousu sur la partie supérieure du corps de l'enveloppe externe.The side panels 27, 28 are sewn together first to form an outer shell body. The upper panel 26 is then sewn on the upper part of the body of the outer casing.

Le panneau supérieur 26 comprend une partie plane 37 surmontée d'une goulotte de remplissage 38 de forme cylindrique, avec une section circulaire ou oblongue. Elle peut être également de forme parallélépipédique.The upper panel 26 comprises a flat portion 37 surmounted by a filler neck 38 of cylindrical shape, with a circular or oblong section. It can also be of parallelepipedal shape.

La goulotte de remplissage 12a de l'enveloppe de protection interne 1 est destinée à ressortir partiellement par cette goulotte de remplissage 38 de l'enveloppe externe 3.The filler neck 12a of the inner protective casing 1 is intended to partially emerge through this filler neck 38 of the outer casing 3.

Le panneau supérieur 26 comprend des fentes de fixation 34 réparties sur sa périphérie.The upper panel 26 comprises fixing slots 34 distributed around its periphery.

Le conteneur souple de grande capacité 2 est destiné à être inséré dans un cadre métallique 2a qui sert de structure portante, comme représenté sur la figure 10, et qui donne à l'ensemble un format facilement intégrable dans des racks de stockage standard, et adaptable aux différents équipements de remplissage et de vidage de l'industrie pharmaceutique.The flexible container of large capacity 2 is intended to be inserted in a metal frame 2a which serves as a supporting structure, as shown in FIG. figure 10 , which gives the unit a format easily integrated in standard storage racks, and adaptable to the different filling and emptying equipment of the pharmaceutical industry.

Les fentes de fixation 34 du panneau supérieur 26 de l'enveloppe externe 3 sont insérées dans des picots 35 faisant saillie sur le rebord supérieur du cadre métallique 2a.The fixing slots 34 of the upper panel 26 of the outer shell 3 are inserted into pins 35 projecting from the upper edge of the metal frame 2a.

Le procédé de fabrication de l'invention permet ainsi de fabriquer des conteneurs souples de grande capacité 2 de forme parallélépipédique rectangulaire sans polluer l'intérieur de l'enveloppe de protection interne 1.The manufacturing method of the invention thus makes it possible to manufacture flexible containers of large capacity 2 of rectangular parallelepiped shape without polluting the inside of the internal protective envelope 1.

Les conteneurs souples de grande capacité 2 peuvent avoir une section rectangulaire de 68 x 108 mm, par exemple, et être logés dans des cadres métalliques de 79 x 119 mm.The flexible containers of large capacity 2 may have a rectangular section of 68 x 108 mm, for example, and be housed in metal frames of 79 x 119 mm.

Claims (11)

  1. A method for producing a large-capacity pliable container (2), wherein said container comprises an inner protective envelope (1) of plastic material to be inserted into an outer envelope (3), said method comprising the following successive steps :
    A) manufacturing the inner protective envelope (1) by :
    a) producing a tubular bellows-type sleeve using an extrusion-blow molding process including a process of forming folds on the tubular bellows-type sleeve, said tubular bellows-type sleeve having a folded shape after the step a),
    b) cutting a portion of the tubular bellows-type sleeve to produce a folded bellows-type sleeve (1a) having a rectangular shape, said folded bellows-type sleeve (1 a) comprising two opposite open ends (4a, 4b) and two lateral folding regions (5a, 5b) separated by a central longitudinal axis (6), each lateral folding region (5a, 5b) comprising three folding lines (7a, 7b, 7c), of which one inner folding line (7b) which extends along and close to the central longitudinal axis (6), and two outer folding lines (7a, 7c),
    c) cutting lateral folding regions (5a, 5b) in the four corners (8) of the folded bellows-type sleeve (1a) in such a way as to obtain a folded bellows-type sleeve (1a) having two narrowed portions (9a, 9b) at its open ends (4a 4b), each of said narrowed portions being delimited by two lateral cut borders (10a, 10b), each comprising four cutting edges (11) stacked together,
    d) soldering adjacent cutting edges (11) ones to the others for each of said lateral cut borders (10a, 10b) in such a way as to produce, when the folded bellows-type sleeve (1a) is unfolded, a parallelepipedic inner protective envelope of square cross-section (1 b), which comprises a spout (12a, 12b) having a square cross-section at its top (23a) and bottom (23b) ends, and
    e) sticking fixing lugs (13) to two opposite lateral fixing faces (14a, 14b) of the folded bellows-type sleeve (1a), each of said lateral fixing faces (14a, 14b) comprising at least four fixing lugs,
    characterized in that the method comprises the following steps :
    f) applying a tractive force to the fixing lugs (13) in order to deform by stretching the parallelepipedic inner protective envelope of square cross-section (1b) and to obtain a parallelepipedic inner protective envelope of rectangular cross-section (1), said inner protective envelope of rectangular cross-section (1) comprising four lateral faces, of which said two lateral fixing faces (14a, 14b) and two opposite stretched lateral faces (15a, 15b) of rectangular shape, each comprising an upper edge (16a), a lower edge (16b) and two outer lateral pockets (17a, 17b) extending along said upper (16a) and lower (16b) edges, respectively,
    g) soldering the outer lateral pockets (17a, 17b) to isolate them from the rest of the inner protective envelope of rectangular cross-section,
    h) cutting the outer lateral pockets (17a, 17b) to remove them from the two stretched lateral faces (15a, 15b), and
    B) assembling the inner protective envelope of rectangular cross-section (1) with the outer envelope (3) in order to form said large-capacity pliable container 2.
  2. Method for producing a pliable container (2) according to Claim 1, characterized in that, during step e) of sticking the fixing lugs (13), four fixing lugs (13) are stuck to each of the lateral fixing faces (14a, 14b) of the folded bellows-type sleeve (1a), said fixing lugs (13) being adjacent to the four corners (25) of the lateral fixing faces (14a, 14b).
  3. Method for producing a pliable container (2) according to Claim 1 or 2, characterized in that the fixing lugs (13) are T-shaped adhesive fixing lugs.
  4. Method for producing a pliable container (2) according to any of Claims 1 to 3, characterized in that the step c) of cutting the lateral folding regions comprises, for each lateral folding region (5a, 5b), two cutting operations in order to obtain two symmetrical cuts relative to the central longitudinal axis (6), each cutting operation being carried out along a first oblique cut (18) relative to the central longitudinal axis (6) and along a second cutting line (19) parallel to the central longitudinal axis (6).
  5. Method for producing a pliable container (2) according to any of Claims 1 to 4, characterized in that the cutting steps b), c) and h) are carried out ultrasonically or by means of a hot blade.
  6. Method for producing a pliable container (2) according to any of Claims 1 to 5, characterized in that the soldering steps d) et g) are carried out by heat sealing.
  7. Method for producing a pliable container (2) according to any of Claims 1 to 6, characterized in that step g) of soldering the outer lateral pockets (17a, 17b) is performed outside the inner protective envelope (1).
  8. Method for producing a pliable container (2) according to any of Claims 1 to 7, characterized in that, the outer envelope (3) being made of several panels of polymeric material, of which one upper panel (26), two small-sized lateral panels (27) and two large-sized lateral panels (28), during the assembling step B), the outer envelope (3) is produced by sewing said panels around the inner protective envelope of rectangular cross-section (1) in such a way as to insert the latter into the outer envelope (3), the fixing lugs (13) of the inner protective envelope of rectangular cross-section (1) being incorporated into the seams formed between said panels.
  9. Method for producing a pliable container (2) according to Claim 8, characterized in that the fixing lugs (13) are positioned on the lateral edges (21) of the inner protective envelope of rectangular cross-section (1), said fixing lugs (13) extending through the outer envelope (3) at the lateral edges (22) thereof.
  10. An inner protective envelope (1), characterized in that it is obtained during the producing process as defined in Claims 1 to 9, said inner protective envelope (1) having a parallellepipedic shape of rectangular cross-section and comprising a spout (12a, 12b) of substantially square cross-section on its upper (23a) and lower (23b) faces.
  11. Method for producing an inner protective envelope for a large-capacity pliable container (2), said pliable container (2) being produced according to any of Claim 1 to 9, characterized in that in the method of producing an inner protective envelope, only steps A)a) to h) of the method of claim 1 are implemented.
EP11712638.3A 2010-02-26 2011-02-24 Method for producing a large-capacity, pliable container, inner protective envelope produced by said method and method for producing an inner protective enveloppe Active EP2539143B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL11712638T PL2539143T3 (en) 2010-02-26 2011-02-24 Method for producing a large-capacity, pliable container, inner protective envelope produced by said method and method for producing an inner protective enveloppe
SI201130696T SI2539143T1 (en) 2010-02-26 2011-02-24 Method for producing a large-capacity, pliable container, inner protective envelope produced by said method and method for producing an inner protective enveloppe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1051406A FR2956834B1 (en) 2010-02-26 2010-02-26 PROCESS FOR MANUFACTURING A HIGH-CAPACITY FLEXIBLE CONTAINER AND INTERNAL PROTECTION ENVELOPE OBTAINED DURING THE METHOD
PCT/FR2011/050389 WO2011104485A1 (en) 2010-02-26 2011-02-24 Method for producing a large-capacity, pliable container and inner protective envelope produced during said method

Publications (2)

Publication Number Publication Date
EP2539143A1 EP2539143A1 (en) 2013-01-02
EP2539143B1 true EP2539143B1 (en) 2015-10-07

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EP11712638.3A Active EP2539143B1 (en) 2010-02-26 2011-02-24 Method for producing a large-capacity, pliable container, inner protective envelope produced by said method and method for producing an inner protective enveloppe

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US (1) US9199424B2 (en)
EP (1) EP2539143B1 (en)
BR (1) BR112012021107B1 (en)
CA (1) CA2791127C (en)
DK (1) DK2539143T3 (en)
ES (1) ES2558311T3 (en)
FR (1) FR2956834B1 (en)
HU (1) HUE025813T2 (en)
PL (1) PL2539143T3 (en)
SI (1) SI2539143T1 (en)
WO (1) WO2011104485A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2982252B1 (en) * 2011-11-07 2014-11-07 Tisza Textil Packaging PROCESS FOR MANUFACTURING A SOFT CONTAINER OF HIGH CAPACITY, SOFT CONTAINER OBTAINED, PACKAGING THEREFOR
US10046870B2 (en) * 2014-04-22 2018-08-14 Ge Healthcare Bio-Sciences Corp. Flexible bag
US20220388766A1 (en) * 2019-11-12 2022-12-08 Christopher Thomas Packaging System for Storing Agricultural Biomass

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781472A (en) * 1987-11-06 1988-11-01 Custom Packaging Systems, Inc. Large bag with liner
BE1001225A6 (en) * 1987-11-19 1989-08-22 Liessens Ludovic Two-layered container sack - has outer and inner sacks stitched together along vertical ribs
US4874258A (en) * 1988-06-23 1989-10-17 Marino Technologies, Inc. Bulk cargo container with inner liner
US5618254A (en) * 1995-04-27 1997-04-08 Super Sack Mfg. Corp. Gusseted bulk bag liner and method of manufacture
US6139482A (en) * 1999-02-12 2000-10-31 Custom Packaging Systems, Inc. Bulk bag or liner and method of making it
US7125168B2 (en) * 2002-12-18 2006-10-24 Scholle Corporation Large container having an outer bag and inner linear method of manufacturing same

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WO2011104485A1 (en) 2011-09-01
BR112012021107A2 (en) 2016-05-17
SI2539143T1 (en) 2016-02-29
DK2539143T3 (en) 2016-01-11
CA2791127C (en) 2018-01-23
FR2956834A1 (en) 2011-09-02
BR112012021107B1 (en) 2019-12-17
ES2558311T3 (en) 2016-02-03
PL2539143T3 (en) 2016-03-31
US9199424B2 (en) 2015-12-01
EP2539143A1 (en) 2013-01-02
FR2956834B1 (en) 2013-08-16
US20120312865A1 (en) 2012-12-13
CA2791127A1 (en) 2011-09-01
HUE025813T2 (en) 2016-05-30

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