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WO2007029165A1 - Welded part, method and device - Google Patents

Welded part, method and device 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
French (fr)
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/en
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.

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

Abstract

The invention concerns a plastic assembly consisting of an axially symmetrical rigid or semirigid part (2, 3), for example a tube shoulder, and a flexible hollow body (1) provided with two ends, for example a laminated tube; said hollow body (1) enclosing and covering the periphery of the rigid or semirigid part (2, 3), thereby defining a contact zone (4, 5) between the two parts. The invention is characterized in that the rigid or semirigid part (2, 3) and the hollow body (1) are welded together over the entire contact zone (4, 6).

Description

PIECE SOUDEE , PROCEDE ET DISPOSITIF WELDED PIECE, METHOD AND DEVICE

Domaine de l'inventionField of the 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.The present invention relates to a plastic container preferably having a tubular shape which comprises a tubular body and a rigid end.

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.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.

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.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.

Etat de la techniqueState of the art

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.The embodiment of 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.

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.For this purpose, one can cite by way of example the manufacture of flexible tubes where the product is extracted by pressure of the fingers on the walls of the tube. Such a container is made by sealing a semi-rigid head at one end of a cylindrical hollow body commonly called the skirt. In this area of the flexible tube, there are skirts produced from mono- or multilayer sheets wound and welded in their longitudinal direction, as well as skirts obtained by extrusion (or co-extrusion for multilayer tubes) of hollow body. The tube head is produced independently by injection molding. The sealing of the tube head is made using a mandrel to hold in place the skirt and the head. The literature relating to the production of flexible tubes is abundant: the German patent of Delavy & Keller DE 4216889 C1 gives a good appreciation of the prior art.

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.Another area of application of this technology is the production of straight flexible pockets with a semi-rigid piece at one of its ends. An example of such a package is given in Spiess & Sohn patent AU 293944 where a semi-rigid head is welded to a flexible sheet shaped cylindrical tube so as to manufacture a straight flexible pouch. The patent application Michalsky EP 1362797 also has a relatively similar package where the body of the container may have at its two ends semi-rigid parts reported.

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 ».Depending on the type of product packaged, it is necessary to subject the container to a chemical treatment to eliminate germs and bacteria on its internal walls. Such treatment can be achieved using liquid or sterilizing gas or sanitizer. In some cases it is necessary to complete this treatment by rinsing with water to remove the sterilizing products. For this treatment to be possible, it is necessary that the container does not have an internal area difficult to access, that is to say of area where the liquid or treatment and rinsing gas can not or hardly access. Commonly these hard-to-reach areas are called dead zones.

Description de l'inventionDescription of the invention

Un des buts de l'invention consiste à obtenir des récipients du type précité mais qui sont dépourvus de zones mortes.One of the objects of the invention is to obtain containers of the aforementioned type but which have no dead zones.

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 .To this end, 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.

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.By performing a weld on the entire contact zone, it eliminates the presence of dead zones between the rigid or semi-rigid part and the hollow body.

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 .Preferably, the welding zone is disposed in a direction oblique or perpendicular to the axis of symmetry of the rigid or semi-rigid piece.

Selon un mode de réalisation de l'invention, la zone de contact se situe vers une extrémité du corps creux.According to one embodiment of the invention, the contact zone is located towards one end of the hollow body.

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.A contact zone may be located towards the upper end of the hollow body, eg for attaching a tube shoulder to the hollow body.

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.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.

Alternativement ou en outre, la zone de contact se situe entre les deux extrémités du corps creux.Alternatively or additionally, the contact zone is located between the two ends of the hollow body.

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 :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:

- chargement de ladite pièce rigide ou semi-rigide sur l'extrémité d'un mandrin, chargement dudit corps creux flexible autour du mandrin,loading said rigid or semi-rigid piece onto the end of a mandrel, loading said flexible hollow body around the mandrel,

- 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 .positioning of the assembly to be welded in a welding matrix comprising an HF coil for induction welding, welding of said rigid or semi-rigid part on said flexible hollow body so that the entire contact zone between the rigid or semi-rigid piece and the flexible hollow body is welded. 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.

L'invention sera mieux comprise ci-après au moyens d'exemples illustrés.The invention will be better understood hereinafter by means of illustrated examples.

La figure 1 présente un récipient comprenant une jupe 1, une épaule de tube 2 et un fond 3.FIG. 1 shows a container comprising a skirt 1, a tube shoulder 2 and a bottom 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.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.

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. Note that in the variant of Figure 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.

Claims

Revendications claims 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).1. Set of plastic material consisting of a rigid or semi-rigid piece with axial symmetry (2, 3), eg a tube shoulder, and a flexible hollow body (1) provided with two ends, .ex a rolled tube; said hollow body (1) surrounding and covering the periphery of the rigid or semi-rigid piece (2,3), thereby defining a contact zone (4,6) between the two pieces, characterized in that the piece rigid or semi-rigid (2, 3) and the hollow body (1) are welded to each other over the entirety of said contact zone (4, 6). 2. Ensemble selon la revendication 1 caractérisé en ce que la zone de soudage2. Assembly according to claim 1 characterized in that the welding zone (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).(4,6) is disposed about an axis oblique or perpendicular to the axis of symmetry of the rigid or semi-rigid piece (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 ).3. An assembly according to claim 1 or 2 characterized in that said contact zone (4, 6) is located towards one end of the hollow body (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.4. The assembly of claim 3 characterized in that the rigid or semi-rigid piece (2,3) is a shoulder or a tube bottom. 5. Ensemble selon la revendication 4 comprenant deux pièces rigides ou semi- rigides (2,3), à savoir une épaule et un fond de tube.5. The assembly of claim 4 comprising two rigid or semi-rigid parts (2,3), namely a shoulder and a tube bottom. 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 ). 6. An assembly according to any preceding claim characterized in that said contact zone (4, 6) is between the two ends of the hollow body (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.7. An assembly according to any one of the preceding claims characterized in that said rigid or semi-rigid piece (2,3) comprises one end and said contact zone (4,6) extends over and covers said end. 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.8. An assembly according to any one of the preceding claims, characterized in that said rigid or semi-rigid piece (2, 3) comprises a welded external surface which merges with said contact zone (4, 6) and a non-external surface. the directions of the two surfaces forming between them an equal or greater angle. 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 :9. A method of welding a rigid or semi-rigid piece (2,3), eg a tube shoulder, to the end and all around a flexible hollow body (1), eg a rolled tube; comprising the following steps: - chargement de ladite pièce rigide ou semi-rigide (2,3) sur l'extrémité d'un mandrin,loading said rigid or semi-rigid piece (2, 3) onto the end of a mandrel, - chargement dudit corps creux flexible (1 ) autour du mandrin,loading said flexible hollow body (1) around the mandrel, - positionnement de l'ensemble à souder dans une matrice de soudage comportant une bobine HF pour soudage par induction,positioning of the assembly to be welded in a welding matrix comprising an HF coil for induction welding, - 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.welding said rigid or semi-rigid piece (2, 3) to said flexible hollow body (1) so that the entire contact zone (4, 6) between the rigid or semi-rigid piece ( 2,3) and the flexible hollow body (1) is welded. 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). 10. Apparatus for carrying out the method according to claim 4 characterized in that it comprises a mandrel comprising an annular portion of ferromagnetic material which is arranged to concentrate the magnetic field HF over the entire contact area (4.6 ).
PCT/IB2006/053096 2005-09-10 2006-09-04 Welded part, method and device Ceased WO2007029165A1 (en)

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GB647596A (en) * 1948-02-09 1950-12-20 Neville Bensley Mattingley Improvements in or relating to collapsible containers
DE1479156B1 (en) * 1959-11-18 1970-10-22 Valer Flax Method and device for producing a tube from thermoplastic material
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