EP2310293A1 - Tube head and production method - Google Patents

Tube head and production method

Info

Publication number
EP2310293A1
EP2310293A1 EP09707333A EP09707333A EP2310293A1 EP 2310293 A1 EP2310293 A1 EP 2310293A1 EP 09707333 A EP09707333 A EP 09707333A EP 09707333 A EP09707333 A EP 09707333A EP 2310293 A1 EP2310293 A1 EP 2310293A1
Authority
EP
European Patent Office
Prior art keywords
cylindrical wall
tube head
tube
thread
head
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.)
Granted
Application number
EP09707333A
Other languages
German (de)
French (fr)
Other versions
EP2310293B1 (en
Inventor
Dominique Hanot
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.)
LOreal SA
Original Assignee
Aisapack Holding SA
LOreal 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, LOreal SA filed Critical Aisapack Holding SA
Publication of EP2310293A1 publication Critical patent/EP2310293A1/en
Application granted granted Critical
Publication of EP2310293B1 publication Critical patent/EP2310293B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/3205—Separate rigid or semi-rigid containers joined to each other at their external surfaces
    • B65D81/3211—Separate rigid or semi-rigid containers joined to each other at their external surfaces coaxially and provided with means facilitating admixture
    • 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
    • B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/02—Body construction

Definitions

  • the invention lies in the field of packaging. It relates more specifically to the packaging of two products to be mixed just before use.
  • EP 1 221 419 consists of a tube with internal thread but whose geometry requires the use of a very complex mold to ensure the release of the part which has a central pin. This solution is technically difficult and expensive in production.
  • the patent application EP 1 958 890 also has a tube whose orifice comprises a ring of teeth that allow the second tube with a thread to screw or snap.
  • the shape of the net is unmolded by unscrewing, the mold part is driven by a combined movement rotation and translation, so according to a propeller having the same pitch as the thread.
  • the shape of the thread is demolded by means of a device called retractable mandrel.
  • the objects disclosed in the aforementioned prior art also have other disadvantages.
  • the transfer of the contents of one tube into the other tube can be slowed down or partially obstructed due to the presence of air pockets.
  • the method of manufacturing the tube heads of the state of the art is relatively complex and expensive.
  • a first object of the invention is to simplify the method of producing the tube head.
  • a second object of the invention is to facilitate the handling of the two tubes when mixing the contents.
  • a third objective is to improve the transfer of the contents of one tube into the other tube.
  • the tube head is formed integrally and performed by a molding process.
  • the head includes a first cylindrical wall having a thread on its outer surface and a second smaller cylindrical wall disposed within the first wall cylindrical, the two cylindrical walls being coaxial, the inner face of the second cylindrical wall having a discontinuous thread defined by a series of sectors and interruptions.
  • the invention also relates to an assembly formed of a tube head as described above on which is screwed another tube head.
  • the invention relates to a method of producing a tube head which comprises a demolding step of the internal thread which is performed by pulling.
  • One of the advantages offered by the invention and to be able to achieve a tube shoulder geometry in a single operation, is an unrealizable operation with the tubes of the state of the art, the latter consisting of two separate parts, the threading inside being on a piece clipped in the orifice, the vents being made in the clip.
  • FIG. 1 shows a tube head according to the invention associated with another tube head.
  • FIG. 2 represents a sectional view of a tube head according to the invention as illustrated in FIG.
  • FIG. 3 represents a perspective view of the tube head according to the invention as illustrated in FIG. Figures 4, 5 and 6 show the different stages of the release of the thread of the tube head according to the invention as illustrated in the previous figures.
  • the tube head 2 illustrated in FIG. 1 constitutes an element of a first tube 4, itself being associated with a second tube 3, the whole forming a packaging assembly 1.
  • the second tube 3 is assembled by screwing into the orifice of the tube head 2, then the contents of the tube 3 is transferred into the tube 4, partially filled, so as to mix the two products just before use.
  • the first tube 4 is made of plastic
  • the second tube 3 can also be made of plastic but also of another material, e.g. ex. in aluminium.
  • Figures 2 and 3 show the tube 4 of plastic material formed of a flexible cylindrical body 16, connected to a head 2 made by a molding process.
  • a shoulder 6 provides the connection between the body 16 and a first cylindrical wall 7 comprising a thread 8 on its outer surface.
  • This external thread 8 serves to close the tube 4 by a screw cap not shown.
  • On the internal face of the cylindrical wall 9 is a discontinuous threading 10, 11 defined by a sequence of sectors 10 and interruptions 11.
  • This discontinuous threading 10,11 makes it possible to ensure the connection of the second tube 3 to the first tube 4.
  • the interruptions 11 constitute passages for the evacuation of the air when the product of the tube 3 is transferred into the tube 4.
  • a notch 12 at the end of the cylindrical wall 9 allows the escape of air in the case where the tube 3 is screwed down, that is to say when the tube 3 is in abutment on the upper edge of the second cylindrical wall 9.
  • the second cylindrical wall 9 is connected, at its base, to the cylindrical wall 7 by an annular partition 14, the three surfaces delimiting a cavity 15 which, as will be seen below, plays an important role in the method of embodiment according to the invention.
  • the tube head 2 according to the invention is designed so that its industrial production is economical and achievable with usual production means, without special devices.
  • the head 2 of the tube 4 is obtained by molding in one step.
  • the geometry of the head is designed so that the release of the internal thread is achieved by pulling.
  • the mold parts are driven solely by translations, which are conventional movements in mold actuating mechanisms, much simpler to implement than combined rotation / translation mechanisms as described in the state of the art.
  • FIGS 4, 5 and 6 illustrate steps of the demolding of the internal thread. Only the parts directly participating in this function are represented, the other parts of the mold are hidden.
  • FIG. 4 shows the relative position of the parts before demolding, more specifically the rod 13 whose periphery comprises the negative surfaces of the interrupted threading 10, and the bushing 14 delimited by the surfaces of the cavity 15.
  • FIG. 5 shows the first demolding phase: the sleeve 14 has been translated so as to release the surfaces of the cavity 15.
  • FIG. 6 shows the demolding phase of the internal threading: the rod 13 has been translated so as to unmold the inner thread 10 by tearing. This operation is facilitated by the fact that the outside of the cylindrical wall 9 is in the void of the cavity 15 and can temporarily deform concentrically.
  • the fact that the internal thread 10, 11 consists of several sectors 10 facilitates the deformation of the cylindrical wall 9.
  • the temporary concentric deformation of the cylindrical wall 9 makes it possible on the one hand to limit the tensile stress on the sectors 10 and 10. on the other hand to minimize the deformation of the net profile.

Abstract

The invention relates to a tube head (2) made of plastic material formed in a single piece and produced by a molding process, said head comprising a first cylindrical wall (7) including a thread (8) on the outer surface thereof and a second smaller cylindrical wall (9), placed inside the first cylindrical wall (9), the two cylindrical walls (7,9) being coaxial, the inner face of the second cylindrical wall (9) comprising a discontinuous thread (10,11) defined by a series of sectors (10) and interruptions (11). The invention also relates to a device and a method for producing the tube head.

Description

Tête de tube et méthode de réalisation Tube head and method of production
Domaine de l'inventionField of the invention
L'invention se situe dans le domaine de l'emballage. Elle concerne plus précisément le conditionnement de deux produits destinés à être mélangés juste avant utilisation.The invention lies in the field of packaging. It relates more specifically to the packaging of two products to be mixed just before use.
Etat de la techniqueState of the art
On connaît des ensembles formés d'un premier tube qui comporte un orifice avec un filetage intérieur et d'un second tube comportant un col avec un filetage extérieur, le second tube pouvant être assemblé au premier tube par vissage, permettant de la sorte de transférer le contenu du second tube dans le premier tube. Un exemple d'ensemble tel que décrit ci-dessus est divulgué dans la demande de brevet français FR 2 685 301. Ce type d'ensemble est utilisé dans de nombreux domaines, en particulier pour les teintures de cheveux ou les colles qui se forment par mélange de deux composants.There are known assemblies formed of a first tube which has an orifice with an internal thread and a second tube having a neck with an external thread, the second tube being assembled to the first tube by screwing, thereby making it possible to transfer the contents of the second tube in the first tube. An example of an assembly as described above is disclosed in the French patent application FR 2,685,301. This type of assembly is used in many fields, in particular for hair dyes or glues which are formed by mixture of two components.
La demande de brevet EP 1 221 419 consiste en un tube avec filetage intérieur mais dont la géométrie nécessite l'usage d'un moule très complexe pour assurer le démoulage de la pièce qui comporte un picot central. Cette solution est techniquement difficile et coûteuse en production.The patent application EP 1 221 419 consists of a tube with internal thread but whose geometry requires the use of a very complex mold to ensure the release of the part which has a central pin. This solution is technically difficult and expensive in production.
La demande de brevet WO 03/050003 décrit un tube dont l'orifice présente des formes longitudinales, sorte de nervures dans lesquelles le second tube est vissé à force, le filet de celui-ci devant tailler son empreinte dans ces nervures. Ceci implique que la matière du second tube doit être bien plus dure que le premier tube.The patent application WO 03/050003 describes a tube whose orifice has longitudinal shapes, like ribs in which the second tube is screwed by force, the thread of the latter having to carve its imprint in these ribs. This implies that the material of the second tube must be much harder than the first tube.
La demande de brevet EP 1 958 890 présente également un tube dont l'orifice comporte une couronne de dents qui permettent au second tube muni d'un filetage de se visser ou de s'encliqueter.The patent application EP 1 958 890 also has a tube whose orifice comprises a ring of teeth that allow the second tube with a thread to screw or snap.
De manière générale, la réalisation par moulage d'un filetage intérieur et délicate.In general, the production by molding of an internal thread and delicate.
Du fait de sa géométrie, il présente des contres dépouilles qui ne peuvent pas être démoulées par un simple déplacement en translation de la partie du moule. Plusieurs solutions existent, en particulier :Because of its geometry, it has counters removes that can not be demolded by a simple displacement in translation of the mold part. Several solutions exist, in particular:
La forme du filet est démoulée par dévissage, la pièce du moule est animée d'un mouvement combiné rotation et translation, donc selon une hélice ayant le même pas que le filetage.The shape of the net is unmolded by unscrewing, the mold part is driven by a combined movement rotation and translation, so according to a propeller having the same pitch as the thread.
La forme du filetage est démoulée grâce à un dispositif appelé mandrin éclipsable.The shape of the thread is demolded by means of a device called retractable mandrel.
Ces procédés sont relativement complexes et difficiles à mettre en œuvre. Par ailleurs, ils ne permettent pas de réaliser des filetages en dessous d'un diamètre minimum.These methods are relatively complex and difficult to implement. Moreover, they do not allow to make threads below a minimum diameter.
Les objets divulgués dans l'art antérieur précité présentent en outre d'autres inconvénients. Le transfert du contenu d'un tube dans l'autre tube peut être ralenti ou partiellement entravé du fait de la présence de poches d'air. Par ailleurs, le procédé de fabrication des têtes de tube de l'état de la technique est relativement complexe et onéreux.The objects disclosed in the aforementioned prior art also have other disadvantages. The transfer of the contents of one tube into the other tube can be slowed down or partially obstructed due to the presence of air pockets. Moreover, the method of manufacturing the tube heads of the state of the art is relatively complex and expensive.
Enfin, la manipulation des tubes lors du mélange n'est pas aisée, notamment lors de la phase d'amorçage du vissage.Finally, the handling of the tubes during mixing is not easy, especially during the initiation phase of the screwing.
Description générale de l'inventionGeneral description of the invention
Un premier objectif de l'invention consiste à simplifier la méthode de réalisation de la tête de tube. Un deuxième objectif de l'invention vise à faciliter la manipulation des deux tubes lors du mélange des contenus.A first object of the invention is to simplify the method of producing the tube head. A second object of the invention is to facilitate the handling of the two tubes when mixing the contents.
Un troisième objectif consiste en une amélioration du transfert du contenu d'un tube dans l'autre tube.A third objective is to improve the transfer of the contents of one tube into the other tube.
Ces objectifs sont atteints avec la tête de tube selon l'invention. Celle-ci est formée d'un seul tenant et réalisée par un procédé de moulage. La tête comprend une première paroi cylindrique comprenant un filetage sur sa surface extérieure et une deuxième paroi cylindrique, plus petite, disposée à l'intérieur de la première paroi cylindrique, les deux parois cylindriques étant coaxiales, la face interne de la deuxième paroi cylindrique comportant un filetage discontinu défini par une suite de secteurs et d'interruptions.These objectives are achieved with the tube head according to the invention. This is formed integrally and performed by a molding process. The head includes a first cylindrical wall having a thread on its outer surface and a second smaller cylindrical wall disposed within the first wall cylindrical, the two cylindrical walls being coaxial, the inner face of the second cylindrical wall having a discontinuous thread defined by a series of sectors and interruptions.
La présence des interruptions rend possible l'évacuation de la poche d'air se trouvant dans l'espace situé entre les contenus à mélanger.The presence of interruptions makes it possible to evacuate the air bag in the space between the contents to be mixed.
L'invention concerne également un ensemble formé d'une tête de tube telle que précédemment décrite sur laquelle est vissée une autre tête de tube.The invention also relates to an assembly formed of a tube head as described above on which is screwed another tube head.
L'invention concerne enfin une méthode de réalisation d'une tête de tube qui comporte une étape de démoulage du filetage intérieur qui est réalisée par arrachage.Finally, the invention relates to a method of producing a tube head which comprises a demolding step of the internal thread which is performed by pulling.
Un des avantages offert par l'invention et de pouvoir réaliser une géométrie d'épaule de tube en une seule opération, soit une opération irréalisable avec les tubes de l'état de la technique, ces derniers étant constitués de deux pièces distinctes, le filetage intérieur étant sur une pièce clipsée dans l'orifice, les évents étant réalisés dans le clips.One of the advantages offered by the invention and to be able to achieve a tube shoulder geometry in a single operation, is an unrealizable operation with the tubes of the state of the art, the latter consisting of two separate parts, the threading inside being on a piece clipped in the orifice, the vents being made in the clip.
Description détaillée de l'inventionDetailed description of the invention
L'invention sera mieux comprise ci-dessous par la description d'un mode d'exécution de celle-ci et des figures qui s'y rapportent, dans lesquelles :The invention will be better understood below by describing an embodiment of the invention and the figures relating thereto, in which:
La figure 1 représente une tête de tube selon l'invention associée à une autre tête de tube. La figure 2 représente une vue en coupe d'une tête de tube selon l'invention telle qu'illustrée sur la figure 1.Figure 1 shows a tube head according to the invention associated with another tube head. FIG. 2 represents a sectional view of a tube head according to the invention as illustrated in FIG.
La figure 3 représente une vue en perspective de la tête de tube selon l'invention telle qu'illustrée sur la figure 1. Les figures 4, 5 et 6 représentent les différentes étapes du démoulage du filetage de la tête de tube selon l'invention telle qu'illustrée sur les figures précédentes.FIG. 3 represents a perspective view of the tube head according to the invention as illustrated in FIG. Figures 4, 5 and 6 show the different stages of the release of the thread of the tube head according to the invention as illustrated in the previous figures.
La tête de tube 2 illustrée sur la figure 1 constitue un élément d'un premier tube 4, lui-même étant associé à un deuxième tube 3, le tout formant un ensemble de conditionnement 1. Après ouverture, le deuxième tube 3 est assemblé par vissage dans l'orifice de la tête de tube 2, puis le contenu du tube 3 est transféré dans le tube 4, partiellement rempli, de manière à mélanger les deux produits juste avant utilisation. Le premier tube 4 est en matière plastique, le deuxième tube 3 peut également être en matière plastique mais également en un autre matériau, p. ex. en aluminium.The tube head 2 illustrated in FIG. 1 constitutes an element of a first tube 4, itself being associated with a second tube 3, the whole forming a packaging assembly 1. After opening, the second tube 3 is assembled by screwing into the orifice of the tube head 2, then the contents of the tube 3 is transferred into the tube 4, partially filled, so as to mix the two products just before use. The first tube 4 is made of plastic, the second tube 3 can also be made of plastic but also of another material, e.g. ex. in aluminium.
Les figures 2 et 3 montrent le tube 4 en matière plastique formé d'un corps cylindrique souple 16, lié à une tête 2 réalisée par un procédé de moulage. Une épaule 6 assure la liaison entre le corps 16 et une première paroi cylindrique 7 comprenant un filetage 8 sur sa surface extérieure. Ce filetage extérieur 8 sert à la fermeture du tube 4 par un bouchon vissé non représenté. Une seconde paroi cylindrique 9, plus petite, à l'intérieur de la première paroi cylindrique 7, défini l'orifice du tube 4. Sur la face interne de la paroi cylindrique 9 se trouve un filetage discontinu 10,11 défini par une suite de secteurs 10 et d'interruptions 11. Ce filetage discontinu 10,11 permet d'assurer la liaison du deuxième tube 3 au premier tube 4. Les interruptions 11 constituent des passages pour l'évacuation de l'air lorsque le produit du tube 3 est transféré dans le tube 4. En outre, une encoche 12 à l'extrémité de la paroi cylindrique 9 permet l'échappement de l'air dans le cas ou le tube 3 est vissé à fond, c'est à dire quand le tube 3 est en butée sur le bord supérieur de la deuxième paroi cylindrique 9.Figures 2 and 3 show the tube 4 of plastic material formed of a flexible cylindrical body 16, connected to a head 2 made by a molding process. A shoulder 6 provides the connection between the body 16 and a first cylindrical wall 7 comprising a thread 8 on its outer surface. This external thread 8 serves to close the tube 4 by a screw cap not shown. A second cylindrical wall 9, smaller inside the first cylindrical wall 7, defines the orifice of the tube 4. On the internal face of the cylindrical wall 9 is a discontinuous threading 10, 11 defined by a sequence of sectors 10 and interruptions 11. This discontinuous threading 10,11 makes it possible to ensure the connection of the second tube 3 to the first tube 4. The interruptions 11 constitute passages for the evacuation of the air when the product of the tube 3 is transferred into the tube 4. In addition, a notch 12 at the end of the cylindrical wall 9 allows the escape of air in the case where the tube 3 is screwed down, that is to say when the tube 3 is in abutment on the upper edge of the second cylindrical wall 9.
La seconde paroi cylindrique 9 est liée, au niveau de sa base, à la paroi cylindrique 7 par une cloison annulaire 14, les trois surfaces délimitant une cavité 15 qui, comme on le verra ci-dessous, joue un rôle important dans la méthode de réalisation selon l'invention. Méthode de réalisationThe second cylindrical wall 9 is connected, at its base, to the cylindrical wall 7 by an annular partition 14, the three surfaces delimiting a cavity 15 which, as will be seen below, plays an important role in the method of embodiment according to the invention. Method of realization
La tête de tube 2 selon l'invention est conçue de manière à ce que sa production industrielle soit économique et réalisable avec des moyens de productions habituels, sans dispositifs spéciaux.The tube head 2 according to the invention is designed so that its industrial production is economical and achievable with usual production means, without special devices.
La tête 2 du tube 4 est obtenue par moulage en une étape. La géométrie de la tête est conçue de manière à ce que le démoulage du filetage intérieur soit réalisé par arrachage. Les pièces du moule sont animées uniquement de translations, qui sont des mouvements classiques dans les mécanismes d'actionnement de moules, beaucoup plus simples à mettre en œuvre que des mécanismes combinés de rotation/translation tels que décrits dans l'état de la technique.The head 2 of the tube 4 is obtained by molding in one step. The geometry of the head is designed so that the release of the internal thread is achieved by pulling. The mold parts are driven solely by translations, which are conventional movements in mold actuating mechanisms, much simpler to implement than combined rotation / translation mechanisms as described in the state of the art.
Les figures 4, 5 et 6 illustrent des étapes du démoulage du filetage intérieur. Seules les pièces participant directement à cette fonction sont représentées, les autres parties du moule sont masquées.Figures 4, 5 and 6 illustrate steps of the demolding of the internal thread. Only the parts directly participating in this function are represented, the other parts of the mold are hidden.
La figure 4 montre la position relative des pièces avant démoulage, plus précisément la tige 13 dont la périphérie comporte les surfaces en négatif du filetage interrompu 10, et la douille 14 délimitée par les surfaces de la cavité 15.FIG. 4 shows the relative position of the parts before demolding, more specifically the rod 13 whose periphery comprises the negative surfaces of the interrupted threading 10, and the bushing 14 delimited by the surfaces of the cavity 15.
La figure 5 montre la première phase de démoulage: la douille 14 a effectué une translation de manière à libérer les surfaces de la cavité 15.FIG. 5 shows the first demolding phase: the sleeve 14 has been translated so as to release the surfaces of the cavity 15.
La figure 6 montre la phase de démoulage du filetage intérieur: la tige 13 a effectué une translation de façon à démouler le filet intérieur 10 par arrachage. Cette opération est facilitée par le fait que l'extérieur de la paroi cylindrique 9 se trouve dans le vide de la cavité 15 et peut se déformer temporairement de manière concentrique. Le fait que le filetage intérieur 10,11 soit constitué de plusieurs secteurs 10 facilite la déformation de la paroi cylindrique 9. La déformation concentrique temporaire de la paroi cylindrique 9 permet d'une part de limiter l'effort de traction sur les secteurs 10 et d'autre part de minimiser la déformation du profil du filet. FIG. 6 shows the demolding phase of the internal threading: the rod 13 has been translated so as to unmold the inner thread 10 by tearing. This operation is facilitated by the fact that the outside of the cylindrical wall 9 is in the void of the cavity 15 and can temporarily deform concentrically. The fact that the internal thread 10, 11 consists of several sectors 10 facilitates the deformation of the cylindrical wall 9. The temporary concentric deformation of the cylindrical wall 9 makes it possible on the one hand to limit the tensile stress on the sectors 10 and 10. on the other hand to minimize the deformation of the net profile.

Claims

Revendications claims
1. Tête de tube (2) en matière plastique formée d'un seul tenant et réalisée par un procédé de moulage ; tête comprenant une première paroi cylindrique (7) comprenant un filetage (8) sur sa surface extérieure et une deuxième paroi cylindrique (9), plus petite, disposée à l'intérieur de la première paroi cylindrique (9), les deux parois cylindriques (7,9) étant coaxiales, la face interne de la deuxième paroi cylindrique (9) comportant un filetage discontinu (10,1 1 )défini par une suite de secteurs (10) et d'interruptions (1 1 ).1. Tube head (2) made of plastic material formed in one piece and produced by a molding process; head comprising a first cylindrical wall (7) comprising a thread (8) on its outer surface and a second smaller cylindrical wall (9) disposed inside the first cylindrical wall (9), the two cylindrical walls ( 7,9) being coaxial, the inner face of the second cylindrical wall (9) having a discontinuous thread (10,1 1) defined by a series of sectors (10) and interruptions (1 1).
2. Tête de tube (2) selon la revendication 1 dans laquelle le bord supérieur de la première paroi cylindrique (7) se situe dans le même plan que le bord supérieur de la deuxième paroi cylindrique (9).2. Tube head (2) according to claim 1 wherein the upper edge of the first cylindrical wall (7) is in the same plane as the upper edge of the second cylindrical wall (9).
3. Tête de tube (2) selon la revendication 2 dans laquelle le bord supérieur de la deuxième paroi cylindrique (9) comporte une encoche (12).3. Tube head (2) according to claim 2 wherein the upper edge of the second cylindrical wall (9) has a notch (12).
4. Tête de tube (2) selon l'une des revendications précédentes dans laquelle les bases des deux parois cylindriques (7,9) sont liées par une cloison annulaire (14).4. Tube head (2) according to one of the preceding claims wherein the bases of the two cylindrical walls (7,9) are connected by an annular partition (14).
5. Ensemble constitué d'une tête de tube (2) selon l'une des revendications précédentes et d'une autre tête de tube (3), ladite autre tête de tube (3) comprenant une paroi cylindrique dotée d'un filetage sur sa face extérieure, ladite paroi cylindrique et ledit filetage étant adapté pour être vissé à l'intérieur de la deuxième paroi cylindrique (9).5. A set consisting of a tube head (2) according to one of the preceding claims and another tube head (3), said other tube head (3) comprising a cylindrical wall with a thread on its outer face, said cylindrical wall and said thread being adapted to be screwed inside the second cylindrical wall (9).
6. Dispositif pour la réalisation d'une tête de tube (2) selon l'une des revendications précédentes comprenant une tige (13) destinée à être disposée à l'intérieur de la deuxième paroi cylindrique (9), ladite tige (13) étant montée coulissante à l'intérieur d'une douille (14) et comportant sur sa face extérieure un relief en négatif du filetage intérieur (10,1 1 ) de la deuxième paroi cylindrique (10,11 ). 6. Device for producing a tube head (2) according to one of the preceding claims comprising a rod (13) intended to be disposed inside the second cylindrical wall (9), said rod (13). being slidably mounted inside a bushing (14) and having on its outer face a negative relief of the internal thread (10,1 1) of the second cylindrical wall (10,11).
7. Méthode de réalisation d'une tête de tube (2) au moyen d'un dispositif tel que défini dans la revendication 7, ladite méthode comprenant une seule et unique étape de moulage d'une tête de tube (2) telle que définie dans l'une des revendications 1 à 4 et au moins une étape de démoulage du filetage intérieur (10,1 1 ) de la tête de tube (2).7. Method of producing a tube head (2) by means of a device as defined in claim 7, said method comprising a single step of molding a tube head (2) as defined in one of claims 1 to 4 and at least one demolding step of the inner thread (10,1 1) of the tube head (2).
8. Méthode selon la revendication 7 dans laquelle ladite étape de démoulage du filetage intérieur est réalisée par arrachage et déformation temporaire de la deuxième paroi cylindrique (9).8. Method according to claim 7 wherein said demolding step of the internal thread is performed by tearing and temporary deformation of the second cylindrical wall (9).
9. Méthode selon la revendication 8 comprenant une première étape de démoulage lors de laquelle la douille (14) est déplacée en translation, ladite première étape étant suivie de ladite étape d'arrachage. 9. The method of claim 8 comprising a first demolding step in which the sleeve (14) is moved in translation, said first step being followed by said pulling step.
EP09707333A 2008-02-05 2009-02-02 Tube head and production method Not-in-force EP2310293B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IB2008050416 2008-02-05
PCT/IB2009/050419 WO2009098634A1 (en) 2008-02-05 2009-02-02 Tube head and production method

Publications (2)

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EP2310293A1 true EP2310293A1 (en) 2011-04-20
EP2310293B1 EP2310293B1 (en) 2012-07-04

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EP09707333A Not-in-force EP2310293B1 (en) 2008-02-05 2009-02-02 Tube head and production method

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US (1) US20110042389A1 (en)
EP (1) EP2310293B1 (en)
JP (1) JP2011512300A (en)
CN (1) CN101939231B (en)
BR (1) BRPI0907763A2 (en)
ES (1) ES2389040T3 (en)
MX (1) MX2010008580A (en)
WO (1) WO2009098634A1 (en)

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Also Published As

Publication number Publication date
EP2310293B1 (en) 2012-07-04
ES2389040T3 (en) 2012-10-22
CN101939231A (en) 2011-01-05
WO2009098634A1 (en) 2009-08-13
BRPI0907763A2 (en) 2015-07-21
CN101939231B (en) 2012-10-03
JP2011512300A (en) 2011-04-21
US20110042389A1 (en) 2011-02-24
MX2010008580A (en) 2010-09-09

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