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WO2007029165A1 - Piece soudée, procédé et dispositif - Google Patents

Piece soudée, procédé et dispositif Download PDF

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Publication number
WO2007029165A1
WO2007029165A1 PCT/IB2006/053096 IB2006053096W WO2007029165A1 WO 2007029165 A1 WO2007029165 A1 WO 2007029165A1 IB 2006053096 W IB2006053096 W IB 2006053096W WO 2007029165 A1 WO2007029165 A1 WO 2007029165A1
Authority
WO
WIPO (PCT)
Prior art keywords
rigid
semi
hollow body
piece
contact zone
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.)
Ceased
Application number
PCT/IB2006/053096
Other languages
English (en)
Inventor
Hugues-Vincent Roy
Jacques Thomasset
Gerhard Keller
David Magni
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.)
Aisapack Holding SA
Original Assignee
Aisapack Holding 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 Aisapack Holding SA filed Critical Aisapack Holding SA
Publication of WO2007029165A1 publication Critical patent/WO2007029165A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • B29C66/5432—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles joining hollow covers and hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • B29C66/5452—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other joining hollow bottoms to bottom of bottles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0008—Magnetic or paramagnetic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages

Definitions

  • the present invention relates to a plastic container preferably having a tubular shape which comprises a tubular body and a rigid end.
  • the present invention is particularly intended, but not exclusively, in the field of packaging non-carbonated food drinks, such as fruit juice, vitamin drink, milk, cold tea, etc.
  • non-carbonated food drinks such as fruit juice, vitamin drink, milk, cold tea, etc.
  • Another field of application of the present invention is the field of flexible plastic tube for the packaging of viscous products such as toothpaste, body care creams, pharmaceutical anointments, food products (mayonnaise, ketchup, mustard), etc.
  • containers comprising a semi-rigid piece sealed to a hollow plastic body of tubular shape is a technology frequently used in the manufacture of packaging.
  • One of the objects of the invention is to obtain containers of the aforementioned type but which have no dead zones.
  • the invention relates to a set of plastic material consisting of a rigid or semi-rigid piece with axial symmetry, eg a tube shoulder, and a flexible hollow body provided with two ends, p. eg a rolled tube; said hollow body surrounding and covering the periphery of the rigid or semi-rigid piece, defining thus a contact zone between the two parts, characterized in that the rigid or semi-rigid part and the hollow body are welded to each other over the entirety of said contact zone.
  • the welding zone is disposed in a direction oblique or perpendicular to the axis of symmetry of the rigid or semi-rigid piece.
  • the contact zone is located towards one end of the hollow body.
  • a contact zone may be located towards the upper end of the hollow body, eg for attaching a tube shoulder to the hollow body.
  • the same or a second contact area may be located towards the lower end of the hollow body, eg for fixing a bottom to the hollow body.
  • the contact zone is located between the two ends of the hollow body.
  • the invention also relates to a method for welding a rigid or semi-rigid part, eg a tube shoulder, on the end and all around a flexible hollow body, eg a rolled tube. ; comprising the following steps:
  • the invention further relates to a device for carrying out the aforementioned method, characterized in that it comprises a mandrel having an annular portion of ferromagnetic material which is arranged to concentrate the HF magnetic field over the entire contact area.
  • FIG. 1 shows a container comprising a skirt 1, a tube shoulder 2 and a bottom 3.
  • FIG. 2 shows a variant of the invention in which the welding zone 7 is arranged in a direction parallel to that of the axis of symmetry of the skirt 1.
  • the welding zone 7 is at the periphery of the shoulder of tube 2 and corresponds to the entirety of the contact zone 6 between the two components.
  • FIG. 3 shows an enlargement of the welding zone between the skirt 1 and the tube shoulder 2.
  • the welding zone 5 is at the periphery of the tube shoulder 2 and corresponds to the entire zone contact 4 between the two components. It should be noted here that the welding zone 5 is not in a plane parallel to the tube shoulder symmetry axis 2.
  • the contact / welding zone 5,4 is oriented in a vertical direction, which forms an angle substantially equal to 90 ° relative to the direction, horizontal formed outer surface not welded of the tube shoulder 2. In the variant of Figure 3, this angle is greater than 90 °.
  • An angle equal to or greater than 90 ° facilitates internal cleaning of the packaging. It avoids the existence of a space with close walls, which would disrupt the flow of cleaning products.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tubes (AREA)

Abstract

Ensemble de matière plastique constitué d'une pièce rigide ou semi-rigide à symétrie axiale (2,3), p.ex. une épaule de tube, et d'un corps creux flexible (1) muni de deux extrémités, p.ex. un tube laminé; ledit corps creux (1) entourant et recouvrant la périphérie de la pièce rigide ou semi-rigide (2,3), définissant de la sorte une zone de contact (4,6) entre les deux pièces, caractérisé par le fait que la pièce rigide ou semi- rigide (2,3) et le corps creux (1) sont soudées l'une à l'autre sur l'intégralité de ladite zone de contact (4,6).

Description

PIECE SOUDEE , PROCEDE ET DISPOSITIF
Domaine de l'invention
La présente invention se rapporte à un récipient en matière plastique ayant de préférence une forme tubulaire qui comprend un corps tubulaire et une extrémité rigide.
La présente invention est particulièrement destinée, mais pas de façon exclusive, au domaine de l'emballage de boissons alimentaires non carbonatées, tel que du jus de fruits, de la boisson vitaminée, du lait, du thé froid, etc.
Un autre domaine d'application de la présente invention est le domaine du tube plastique flexible pour l'emballage de produits visqueux tels que le dentifrice, les crèmes de soins corporels, les onctions pharmaceutiques, les produits alimentaires (mayonnaise, ketchup, moutarde), etc.
Etat de la technique
La réalisation de récipients comprenant une pièce semi-rigide scellée à un corps creux plastique de forme tubulaire est une technologie fréquemment utilisée lors de la fabrication d'emballages.
A cet effet, on peut citer à titre d'exemple la fabrication de tubes flexibles où le produit est extrait par pression des doigts sur les parois du tube. Un tel contenant est réalisé par le scellage d'une tête semi-rigide à une des extrémités d'un corps creux cylindrique appelé communément la jupe. Dans ce domaine du tube flexible, on trouve des jupes produites à partir de feuilles mono- ou multicouches enroulées et soudées selon leur direction longitudinale, ainsi que des jupes obtenues par extrusion (ou co-extrusion pour des tubes multicouches) de corps creux. La tête de tube est produite de manière indépendante par injection moulage. Le scellage de la tête de tube est réalisé à l'aide de mandrin permettant de maintenir en place la jupe et la tête. La littérature relative à la réalisation de tubes flexibles est abondante : le brevet allemand de Delavy & Keller DE 4216889 C1 donne une bonne appréciation de l'art antérieur.
Un autre domaine d'application de cette technologie est la production de poches flexibles droites avec une pièce semi-rigide à l'une de ses extrémités. Un exemple d'un tel emballage est donné dans le brevet de Spiess & Sohn AU 293944 où une tête semi-rigide est soudée à une feuille flexible mise en forme de tube cylindrique de manière à fabriquer une poche souple droite. La demande de brevet Michalsky EP 1362797 présente aussi un emballage relativement similaire où le corps du container peut comporter à ses deux extrémités des pièces semi-rigides rapportées.
Selon le type de produit emballé, il est nécessaire de soumettre le récipient à un traitement chimique pour éliminer les germes et bactéries se trouvant sur ses parois internes. Un tel traitement peut être réalisé à l'aide de liquide ou de gaz stérilisant ou aseptisant. Dans certain cas il est nécessaire de compléter ce traitement par un rinçage à l'eau pour éliminer les produits stérilisants. Pour que ce traitement soit possible, il est nécessaire que le container ne possède pas de zone interne difficile d'accès, c'est-à-dire de zone où le liquide ou gaz de traitement et de rinçage ne peut pas ou difficilement accéder. Communément ces zones difficiles d'accès sont appelées « zones mortes ».
Description de l'invention
Un des buts de l'invention consiste à obtenir des récipients du type précité mais qui sont dépourvus de zones mortes.
A cet effet, l'invention concerne un ensemble de matière plastique constitué d'une pièce rigide ou semi-rigide à symétrie axiale, p.ex. une épaule de tube, et d'un corps creux flexible muni de deux extrémités, p.ex. un tube laminé; ledit corps creux entourant et recouvrant la périphérie de la pièce rigide ou semi-rigide, définissant de la sorte une zone de contact entre les deux pièces, caractérisé par le fait que la pièce rigide ou semi-rigide et le corps creux sont soudées l'une à l'autre sur l'intégralité de ladite zone de contact .
En réalisant un soudage sur l'intégralité de la zone de contact, on élimine la présence de zones mortes entre la pièce rigide ou semi-rigide et le corps creux.
De préférence, zone de soudage est disposée selon une direction oblique ou perpendiculaire par rapport à l'axe de symétrie de la pièce rigide ou semi-rigide .
Selon un mode de réalisation de l'invention, la zone de contact se situe vers une extrémité du corps creux.
Une zone de contact peut se situer vers l'extrémité supérieure du corps creux, p.ex. pour la fixation d'une épaule de tube sur le corps creux.
La même zone de contact, ou une deuxième, peut se situer vers l'extrémité inférieure du corps creux, p.ex. pour la fixation d'un fond sur le corps creux.
Alternativement ou en outre, la zone de contact se situe entre les deux extrémités du corps creux.
L'invention concerne également un procédé de soudage d'une pièce rigide ou semi- rigide, p.ex. une épaule de tube, sur l'extrémité et tout le pourtour d'un corps creux flexible, p.ex. un tube laminé ; comprenant les étapes suivantes :
- chargement de ladite pièce rigide ou semi-rigide sur l'extrémité d'un mandrin, chargement dudit corps creux flexible autour du mandrin,
- positionnement de l'ensemble à souder dans une matrice de soudage comportant une bobine HF pour soudage par induction, - soudage de ladite pièce rigide ou semi-rigide sur ledit corps creux flexible de manière à ce que l'intégralité de la zone de contact entre la pièce rigide ou semi- rigide et le corps creux flexible soit soudée. L'invention concerne en outre un dispositif pour la réalisation du procédé précité, caractérisé par le fait qu'il comprend un mandrin comportant une partie annulaire en matière ferromagnétique qui est disposée de manière à concentrer le champ magnétique HF sur toute la zone de contact .
L'invention sera mieux comprise ci-après au moyens d'exemples illustrés.
La figure 1 présente un récipient comprenant une jupe 1, une épaule de tube 2 et un fond 3.
La figure 2 présente une variante de l'invention où la zone de soudage 7 est disposée selon une direction parallèle à celle de l'axe de symétrie de la jupe 1. La zone de soudage 7 se trouve à la périphérie de l'épaule de tube 2 et correspond à l'intégralité de la zone de contact 6 entre les deux composants. La figure 3 présente un agrandissement de la zone de soudage entre la jupe 1 et l'épaule de tube 2. La zone de soudage 5 se trouve à la périphérie de l'épaule de tube 2 et elle correspond à l'intégralité de la zone de contact 4 entre les deux composants. A noter ici que la zone de soudage 5 ne se trouve pas dans un plan parallèle à l'axe de symétrie de épaule de tube 2.
A noter que dans la variante de la figure 2, la zone de contact/soudage 5,4 est orientée selon une direction, verticale, qui forme un angle sensiblement égal à 90° par rapport à la direction, horizontale, formée surface externe non soudée de l'épaule de tube 2 . Dans la variante de la figure 3, cet angle est supérieur à 90 °. Un angle égal ou supérieur à 90 ° facilite le nettoyage interne de l'emballage. Il évite l'existence d'un espace aux parois rapprochées, qui perturberait l'écoulement des produits de nettoyage.

Claims

Revendications
1. Ensemble de matière plastique constitué d'une pièce rigide ou semi-rigide à symétrie axiale (2,3), p.ex. une épaule de tube, et d'un corps creux flexible (1 ) muni de deux extrémités, p.ex. un tube laminé; ledit corps creux (1 ) entourant et recouvrant la périphérie de la pièce rigide ou semi-rigide (2,3), définissant de la sorte une zone de contact (4,6) entre les deux pièces, caractérisé par le fait que la pièce rigide ou semi-rigide (2,3) et le corps creux (1 ) sont soudées l'une à l'autre sur l'intégralité de ladite zone de contact (4,6).
2. Ensemble selon la revendication 1 caractérisé en ce que la zone de soudage
(4,6) est disposée autour d'un axe oblique ou perpendiculaire par rapport à l'axe de symétrie de la pièce rigide ou semi-rigide (2,3).
3. Ensemble selon la revendication 1 ou 2 caractérisé en ce que ladite zone de contact (4, 6) se situe vers une extrémité du corps creux (1 ).
4. Ensemble selon la revendication 3 caractérisé en ce que la pièce rigide ou semi-rigide (2,3) est une épaule ou un fond de tube.
5. Ensemble selon la revendication 4 comprenant deux pièces rigides ou semi- rigides (2,3), à savoir une épaule et un fond de tube.
6. Ensemble selon l'une quelconque des revendications précédentes caractérisé en ce que ladite zone de contact (4, 6) se situe entre les deux extrémités du corps creux (1 ).
7. Ensemble selon l'une quelconque des revendications précédentes caractérisé en ce que ladite pièce rigide ou semi-rigide (2,3) comprend une extrémité et que ladite zone de contact (4,6) s'étend sur et recouvre ladite extrémité.
8. Ensemble selon l'une quelconque des revendications précédentes caractérisé en ce que ladite pièce rigide ou semi-rigide (2,3) comporte une surface externe soudée qui se confond avec ladite zone de contact (4,6) et une surface externe non-soudée, les directions des deux surfaces formant entre elles un angle égal ou supérieur.
9. Procédé de soudage d'une pièce rigide ou semi-rigide(2,3), p.ex. une épaule de tube, sur l'extrémité et tout le pourtour d'un corps creux flexible (1 ), p.ex. un tube laminé ; comprenant les étapes suivantes :
- chargement de ladite pièce rigide ou semi-rigide (2,3) sur l'extrémité d'un mandrin,
- chargement dudit corps creux flexible (1 ) autour du mandrin,
- positionnement de l'ensemble à souder dans une matrice de soudage comportant une bobine HF pour soudage par induction,
- soudage de ladite pièce rigide ou semi-rigide (2,3) sur ledit corps creux flexible (1) de manière à ce que l'intégralité de la zone de contact (4,6) entre la pièce rigide ou semi-rigide (2,3) et le corps creux flexible (1) soit soudée.
10. Dispositif pour la réalisation du procédé selon la revendication 4 caractérisé par le fait qu'il comprend un mandrin comportant une partie annulaire en matière ferromagnétique qui est disposée de manière à concentrer le champ magnétique HF sur toute la zone de contact (4,6).
PCT/IB2006/053096 2005-09-10 2006-09-04 Piece soudée, procédé et dispositif Ceased WO2007029165A1 (fr)

Applications Claiming Priority (2)

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IBPCT/IB2005/052966 2005-09-10
IB2005052966 2005-09-10

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WO2007029165A1 true WO2007029165A1 (fr) 2007-03-15

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN119748880A (zh) * 2025-01-08 2025-04-04 西北工业大学 一种基于磁集中器的热塑性复合材料感应焊接方法

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GB647596A (en) * 1948-02-09 1950-12-20 Neville Bensley Mattingley Improvements in or relating to collapsible containers
DE1479156B1 (de) * 1959-11-18 1970-10-22 Valer Flax Verfahren und Vorrichtung zum Herstellen einer Tube aus thermoplastischem Kunststoff
DE8435372U1 (de) * 1984-12-03 1987-01-15 Automation Industrielle S.A., Vouvry Vorrichtung zum festen Verbinden eines Tubenrohrkörpers mit Überlappungsnaht auf dem Schulterrand eines Kopfstücks mit Ausgabeöffnung
EP0555620A1 (fr) * 1992-02-10 1993-08-18 Akerlund & Rausing Licens Aktiebolag Méthode et appareil pour le soudage par ultrasons d'un joint circulaire étanche s'étendant sur toute la circonférence
US5263606A (en) * 1992-01-17 1993-11-23 Continental Plastics, Inc. Squeeze container with sonically welded flexible tubular body and bottom cover
US5690764A (en) * 1995-02-13 1997-11-25 The Procter & Gamble Company Collapsible tube package and method of construction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB647596A (en) * 1948-02-09 1950-12-20 Neville Bensley Mattingley Improvements in or relating to collapsible containers
DE1479156B1 (de) * 1959-11-18 1970-10-22 Valer Flax Verfahren und Vorrichtung zum Herstellen einer Tube aus thermoplastischem Kunststoff
DE8435372U1 (de) * 1984-12-03 1987-01-15 Automation Industrielle S.A., Vouvry Vorrichtung zum festen Verbinden eines Tubenrohrkörpers mit Überlappungsnaht auf dem Schulterrand eines Kopfstücks mit Ausgabeöffnung
US5263606A (en) * 1992-01-17 1993-11-23 Continental Plastics, Inc. Squeeze container with sonically welded flexible tubular body and bottom cover
EP0555620A1 (fr) * 1992-02-10 1993-08-18 Akerlund & Rausing Licens Aktiebolag Méthode et appareil pour le soudage par ultrasons d'un joint circulaire étanche s'étendant sur toute la circonférence
US5690764A (en) * 1995-02-13 1997-11-25 The Procter & Gamble Company Collapsible tube package and method of construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119748880A (zh) * 2025-01-08 2025-04-04 西北工业大学 一种基于磁集中器的热塑性复合材料感应焊接方法

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