FR2730665A1 - Prodn. of tubular structures - Google Patents

Prodn. of tubular structures Download PDF

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Publication number
FR2730665A1
FR2730665A1 FR9502213A FR9502213A FR2730665A1 FR 2730665 A1 FR2730665 A1 FR 2730665A1 FR 9502213 A FR9502213 A FR 9502213A FR 9502213 A FR9502213 A FR 9502213A FR 2730665 A1 FR2730665 A1 FR 2730665A1
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France
Prior art keywords
core
section
sections
tubular structure
pieces
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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.)
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FR9502213A
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French (fr)
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BIDAULT SIRE PIERRE OLIVIER
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BIDAULT SIRE PIERRE OLIVIER
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Priority to FR9502213A priority Critical patent/FR2730665A1/en
Publication of FR2730665A1 publication Critical patent/FR2730665A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/20—Flexible squeeze tubes, e.g. for cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
    • B29C65/5071—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and being composed by one single element
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
    • B29C65/5085—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and comprising grooves, e.g. being E-shaped, H-shaped
    • 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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt 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
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
    • 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
    • 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
    • B29C66/547—Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles, e.g. endless tubes
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • 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
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/524—Joining profiled elements
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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
    • B29C66/721—Fibre-reinforced materials
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • 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
    • B29K2995/0037—Other properties
    • B29K2995/0049—Heat shrinkable
    • 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
    • B29L2031/766—Poles, masts, posts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

A tubular structure is made by taking a number, partic. four, of profiles presenting a section corresp. to a section of the structure; partic. all identical cover pieces of right angle section made from fibres by pultrusion. The profiles are joined together with connection pieces each joining two of the profiles, to form a core for the structure. Partic. the connection pieces are of double 'U' shape also made by pultrusion. The core is then reinforced by gluing the connection parts, adding a layer of material to insulate the core, and then a sheet of heat shrinkable material that is heated to shrink in place around the core. The insulating layer is glass, carbon, aramid or high molecular wt. polyethylene.

Description

Procédé de fabrication de structures tubulaires et structure tubulaire correspondante. Method of manufacturing tubular structures and corresponding tubular structure.

Le domaine de l'invention est celui de la fabrication de structures tubulaires. Plus précisément, I'invention concerne un procédé de fabrication de telles structures ne nécessitant pas de moulage et possédant un noyau permanent structurel en matériaux composites. The field of the invention is that of manufacturing tubular structures. More specifically, the invention relates to a process for manufacturing such structures which do not require molding and which have a permanent structural core made of composite materials.

L'invention s'applique notamment à la réalisation de mâts, d'antennes, de mèches, ou d'espars. The invention applies in particular to the production of masts, antennas, wicks, or spars.

Un premier procédé connu de fabrication de structures tubulaires consiste à enrouler des filaments ou des rubans. A first known method of manufacturing tubular structures consists in winding filaments or ribbons.

Un autre procédé connu consiste à mouler les espars, soit sur des moules mâles, soit sur des moules femelles. Another known method consists in molding the spars, either on male molds or on female molds.

De tels procédés de fabrication présentent de nombreux inconvénients. Such manufacturing methods have many drawbacks.

Notamment, ces techniques sont onéreuses, car elles nécessitent un outillage sophistiqué et une main d'oeuvre qualifiée et importante.In particular, these techniques are expensive, because they require sophisticated tools and a skilled and significant workforce.

De plus, les qualités intrinsèques du stratifié final sont difficilement certifiables. In addition, the intrinsic qualities of the final laminate are difficult to certify.

L'invention a notamment pour objectif de pallier ces inconvénients de l'état de la technique. The invention particularly aims to overcome these drawbacks of the state of the art.

Notamment, un objectif de l'invention est de fournir un procédé de fabrication ayant un coût de mise en oeuvre peu élevé, et en particulier inférieur à celui des techniques connues. In particular, an objective of the invention is to provide a manufacturing process having a low cost of implementation, and in particular lower than that of known techniques.

Un autre objectif de l'invention est de fournir un tel procédé qui soit simple à mettre en oeuvre et qui ne nécessite pas de moyens de fabrication importants et/ou coûteux. En particulier, I'invention a pour objectif de fournir un tel procédé ne nécessitant pas l'utilisation de moule de fabrication. Another objective of the invention is to provide such a method which is simple to implement and which does not require significant and / or expensive manufacturing means. In particular, the invention aims to provide such a process which does not require the use of a manufacturing mold.

Encore un autre objectif de l'invention est de proposer un tel procédé permettant de produire des structures tubulaires présentant des propriétés de solidité, de souplesse, et de durée dans le temps supérieure à celles obtenues par les techniques classiques. Yet another objective of the invention is to propose such a method making it possible to produce tubular structures having properties of solidity, flexibility, and duration over time greater than those obtained by conventional techniques.

L'invention a également pour objectif de fournir un tel procédé, qui assure une qualité homogène et certifiable des structures tubulaires réalisées.  The invention also aims to provide such a method, which ensures a uniform and certifiable quality of the tubular structures produced.

Ces différents objectifs, ainsi que d'autres qui apparaîtront par la suite, sont atteints selon la présente invention à l'aide d'un procédé de fabrication d'une structure tubulaire, comprenant les étapes suivantes: (a) obtention de N profilés, N étant supérieur ou égal à 2, chaque profilé présentant
une section correspondant sensiblement à une portion de la section de ladite
structure tubulaire; (b) assemblage desdits profilés à l'aide de pièces de jonction, chacune desdites pièces
de jonction solidarisant deux desdits profilés, de façon à former un noyau pour
ladite structure tubulaire; (c) renforcement dudit noyau de façon à former une structure tubulaire permanente.These various objectives, as well as others which will appear subsequently, are achieved according to the present invention using a method of manufacturing a tubular structure, comprising the following steps: (a) obtaining N sections, N being greater than or equal to 2, each profile having
a section corresponding substantially to a portion of the section of said
tubular structure; (b) assembling said sections using junction pieces, each of said pieces
junction joining two of said profiles, so as to form a core for
said tubular structure; (c) reinforcement of said core so as to form a permanent tubular structure.

Avantageusement, lesdits profilés et/ou lesdites pièces de jonction sont de formes identiques. Advantageously, said sections and / or said connecting pieces are of identical shapes.

De façon préférentielle, N est égal à 4, et chacun desdits profilés présente une section à angle droit et correspondant sensiblement à un quart de la section dudit noyau. Preferably, N is equal to 4, and each of said sections has a section at right angles and corresponding substantially to a quarter of the section of said core.

Dans un mode de réalisation préférentiel, lesdits profilés et/ou lesdites pièces de jonction sont obtenus par pultrusion. In a preferred embodiment, said sections and / or said connecting pieces are obtained by pultrusion.

Avantageusement, lesdits profilés sont constitués de.fibres et de résines. Advantageously, said sections are made of fibers and resins.

Selon un mode de réalisation préférentiel, lesdites pièces de jonction sont des profilés présentant une section en double U ou en T. According to a preferred embodiment, said junction pieces are profiles having a double U or T section.

De façon avantageuse, ladite étape de renforcement comprend au moins une des étapes suivantes: (a) collage des pièces de jonction et des profilés; (b) ajout de renforts d'ancrage locaux; (c) ajout d'au moins une couche d'un matériau destiné à isoler le noyau; (d) ajout d'un film de matériau thermorétractable, et chauffage dudit matériau
thermorétractable, afin d'assurer le compactage des éléments formant ladite
structure tubulaire.Advantageously, said reinforcing step comprises at least one of the following steps: (a) bonding the junction pieces and the profiles; (b) addition of local anchor reinforcements; (c) adding at least one layer of a material intended to insulate the core; (d) adding a film of heat-shrinkable material, and heating said material
heat-shrinkable, in order to ensure the compaction of the elements forming said
tubular structure.

Selon une variante avantageuse, le matériau formant lesdites couches isolantes comprend du verre, du carbone, de l'aramide, ou du polyéthylène HM. According to an advantageous variant, the material forming said insulating layers comprises glass, carbon, aramid, or HM polyethylene.

L'invention concerne également une structure tubulaire réalisée selon le procédé décrit ci-avant et comprenant un noyau formé par un assemblage de N profilés, N étant supérieur ou égal à 2, chaque profilé présentant une section correspondant sensiblement à une portion de la section de ladite structure tubulaire, lesdits profilés étant solidarisés à l'aide de pièces de jonction, chacune desdites pièces de jonction solidarisant deux desdits profilés. The invention also relates to a tubular structure produced according to the method described above and comprising a core formed by an assembly of N profiles, N being greater than or equal to 2, each profile having a section corresponding substantially to a portion of the section of said tubular structure, said sections being joined by means of junction pieces, each of said junction pieces joining two of said profiles.

Avantageusement, le noyau de ladite structure est renforcé à l'aide d'au moins un des éléments appartenant au groupe comprenant:
- de la colle;
- des renforts d'ancrage locaux
- au moins une couche de matériau destiné à isoler le noyau;
- un matériau thermorétractable.Advantageously, the core of said structure is reinforced with at least one of the elements belonging to the group comprising:
- glue;
- local anchor reinforcements
- at least one layer of material intended to isolate the core;
- a heat-shrinkable material.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description suivante d'un mode de réalisation préférentiel, donné à titre d'exemple illustratif et non limitatif, et des dessins annexés, dans lesquels
- la figure 1 est une représentation schématique des différentes étapes du
procédé de l'invention;
- la figure 2 est un schéma illustrant la façon dont les différents éléments
sont assemblés pour former le noyau de la structure tubulaire selon la
présente invention;
- la figure 3 représente un profilé servant à constituer le noyau de la
structure tubulaire selon la présente invention;
- la figure 4 représente un élément de jonction servant à assembler les
profilés selon la présente invention ; et
- la figure 5 illustre une étape de renforcement du noyau de la structure
tubulaire selon la présente invention.Other characteristics and advantages of the present invention will appear on reading the following description of a preferred embodiment, given by way of illustrative and nonlimiting example, and the appended drawings, in which
- Figure 1 is a schematic representation of the different stages of
method of the invention;
- Figure 2 is a diagram illustrating how the different elements
are assembled to form the core of the tubular structure according to the
present invention;
- Figure 3 shows a profile used to form the core of the
tubular structure according to the present invention;
- Figure 4 shows a connecting element used to assemble the
profiles according to the present invention; and
- Figure 5 illustrates a step of strengthening the core of the structure
tubular according to the present invention.

L'invention concerne donc un procédé de réalisation d'une structure tubulaire, sans moule, avec un noyau permanent structurel en matériaux composites. The invention therefore relates to a method for producing a tubular structure, without mold, with a permanent structural core made of composite materials.

La figure I illustre de façon schématique les différentes étapes d'un mode de réalisation préférentiel du procédé de la présente invention. Figure I illustrates schematically the different steps of a preferred embodiment of the method of the present invention.

D'une façon générale, I'invention consiste à assembler un noyau structurel de la forme du profil à réaliser, puis à le renforcer. Le procédé de l'invention comprend donc trois étapes principales:
- une étape d'obtention 11 des éléments nécessaires à la formation du noyau
de la structure tubulaire de l'invention,
- une étape d'assemblage 12 de ces éléments pour former un noyau.In general, the invention consists in assembling a structural core of the shape of the profile to be produced, then in strengthening it. The method of the invention therefore comprises three main stages:
- a step of obtaining 11 of the elements necessary for the formation of the nucleus
of the tubular structure of the invention,
- A step of assembling 12 of these elements to form a core.

- une étape de renforcement 13 de la structure autour de ce noyau
L'étape 1 1 comprend une étape 111 d'obtention de N profilés, N étant supérieur ou égal à 2 et une étape 112 d'obtention de N éléments de jonction. Ces différents éléments peuvent notamment être obtenus par pultrusion et peuvent par exemple être constitués de résine et de fibres. La section des profilés est choisie de façon que l'assemblage final forme la structure tubulaire. La longueur des profilés correspond sensiblement à celle souhaitée pour la structure finale. Selon un autre mode de réalisation, cette longueur peut être fixe, ou choisie parmi un nombre donné de possibilités. Dans ce cas, il est envisageable d'assembler plusieurs structures tubulaires pour former le mat final.a step 13 of strengthening the structure around this core
Step 11 includes a step 111 for obtaining N profiles, N being greater than or equal to 2 and a step 112 for obtaining N junction elements. These various elements can in particular be obtained by pultrusion and can for example be made of resin and fibers. The section of the profiles is chosen so that the final assembly forms the tubular structure. The length of the profiles corresponds substantially to that desired for the final structure. According to another embodiment, this length can be fixed, or chosen from a given number of possibilities. In this case, it is possible to assemble several tubular structures to form the final mat.

Le principe de la présente invention est d'assembler un nombre identique de profilés et d'éléments de jonction. L'étape d'assemblage 12 consiste à assembler les éléments en insérant les extrémités des profilés dans les éléments de jonction, de façon à former le noyau de la structure tubulaire. Le nombre des profilés peut être variable, mais sera avantageusement de 4, comme cela apparaîtra par la suite. The principle of the present invention is to assemble an identical number of sections and joining elements. The assembly step 12 consists in assembling the elements by inserting the ends of the profiles in the junction elements, so as to form the core of the tubular structure. The number of profiles can be variable, but will advantageously be 4, as will appear later.

L'étape de renforcement 13 comprend par exemple les étapes suivantes:
- collage 131 des différents éléments, à l'aide d'une colle époxyde;
- ajout 132 de renforts d'ancrage locaux;
- ajout 133 d'au moins une couche isolante, constituée d'une succession de
couches de tissus ou de résines (verre, carbone, aramide, polyéthylène
HM...). Les tissus pourront par exemple être présentés sous forme de
chaussettes que l'on viendra enfiler sur le noyau;
- ajout 134 d'une couche de finition constituée de matériau
thermorétractable, par exemple un film de cellophane;
- chauffage du noyau, afin d'assurer le bon compactage de toutes les
couches, grâce à l'action du matériau thermorétractable.The strengthening step 13 comprises for example the following steps:
- Bonding 131 of the various elements, using an epoxy adhesive;
- addition 132 of local anchoring reinforcements;
- addition 133 of at least one insulating layer, consisting of a succession of
layers of fabrics or resins (glass, carbon, aramid, polyethylene
HM ...). The fabrics may for example be presented in the form of
socks that we will put on the core;
- addition 134 of a finishing layer made of material
heat shrinkable, for example a cellophane film;
- core heating, to ensure good compaction of all
layers, thanks to the action of the heat-shrinkable material.

Bien sûr, il est possible de supprimer une de ces étapes, ou d'en ajouter d'autres, sans sortir du cadre de la présente invention. Of course, it is possible to delete one of these steps, or to add others, without departing from the scope of the present invention.

La figure 2 est un schéma illustrant la façon dont les différents éléments sont assemblés pour former le noyau de la structure tubulaire selon la présente invention, dans le cas particulier où le noyau est formé à partir de 4 profilés en angle. Figure 2 is a diagram illustrating how the different elements are assembled to form the core of the tubular structure according to the present invention, in the particular case where the core is formed from 4 angle profiles.

La section du profilé correspondant est illustrée en figure 3 et celle de l'élément de jonction en figure 4. Afin de permettre une meilleure compréhension de l'invention, il est clair que les échelles de ces 2 figures ne sont pas identiques. The section of the corresponding profile is illustrated in FIG. 3 and that of the joining element in FIG. 4. In order to allow a better understanding of the invention, it is clear that the scales of these 2 figures are not identical.

Avantageusement, les éléments de jonction sont en double U, tel qu'illustré en figure 4. I1 peuvent également, par exemple, être en forme de T. Advantageously, the junction elements are double U, as illustrated in FIG. 4. I1 can also, for example, be in the shape of a T.

Quatre profilés d'angle 211 à 214, ayant chacun une section d'un quart du profil final (tel qu'illustré en figure 4) sont assemblés au moyen de quatre éléments de jonction 221 à 224. Cependant, le noyau peut être formé d'un autre nombre de profilés. I1 est tout à fait possible, par exemple, d'assembler deux profilés d'angle, ayant chacun une section de la moitié du profil final, au moyen de deux éléments de jonction. Par ailleurs, il est clair que la forme du profilé de la figure 3 peut être modifiée. Four corner sections 211 to 214, each having a section of a quarter of the final profile (as illustrated in FIG. 4) are assembled by means of four joining elements 221 to 224. However, the core can be formed of 'another number of profiles. It is entirely possible, for example, to assemble two corner sections, each having a section of half the final profile, by means of two joining elements. Furthermore, it is clear that the shape of the profile of Figure 3 can be changed.

Une fois que l'assemblage de la figure est terminé, il est nécessaire de renforcer le noyau ainsi obtenu (étape 13 de la figure 1). Once the assembly of the figure is completed, it is necessary to reinforce the core thus obtained (step 13 of Figure 1).

La structure tubulaire terminée est illustrée en figure 5. Le noyau de la figure 2 est consolidé par collage, au moyen d'une colle époxyde 51. Des renforts d'ancrage locaux (non représentés) sont alors rapportés sur celui-ci. Une chaussette 52 est ensuite utilisée pour isoler le noyau, ladite chaussette 52 pouvant être constituée, par exemple, de résine et de tissus, et étant enfilée sur le noyau. Une couche de finition 53 est ensuite déposée sur l'ensemble, constituée d'un matériau thermorétractable, par exemple un film de cellophane. Enfin, l'ensemble est chauffé, et le matériau thermorétractable assure alors le bon compactage de toutes les couches.  The finished tubular structure is illustrated in FIG. 5. The core of FIG. 2 is consolidated by gluing, by means of an epoxy adhesive 51. Local anchoring reinforcements (not shown) are then attached to it. A sock 52 is then used to insulate the core, said sock 52 possibly being made, for example, of resin and fabrics, and being threaded onto the core. A finishing layer 53 is then deposited on the assembly, consisting of a heat-shrinkable material, for example a cellophane film. Finally, the assembly is heated, and the heat-shrinkable material then ensures good compaction of all the layers.

Claims (10)

RevendicationsClaims 1 . Procédé de fabrication d'une structure tubulaire, caractérisé en ce qu'il comprend les étapes suivantes: (a) obtention de N profilés, N étant supérieur ou égal à 2, chaque profilé présentant1. Method of manufacturing a tubular structure, characterized in that it comprises the following steps: (a) obtaining N sections, N being greater than or equal to 2, each section having une section correspondant sensiblement à une portion de la section de ladite a section corresponding substantially to a portion of the section of said structure tubulaire; (b) assemblage desdits profilés à l'aide de pièces de jonction, chacune desdites pièces tubular structure; (b) assembling said sections using junction pieces, each of said pieces de jonction solidarisant deux desdits profilés, de façon à former un noyau pour junction joining two of said profiles, so as to form a core for ladite structure tubulaire; (c) renforcement dudit noyau de façon à former une structure tubulaire permanente. said tubular structure; (c) reinforcement of said core so as to form a permanent tubular structure. 2. Procédé selon la revendication 1, caractérisé en ce que lesdits profilés et/ou lesdites pièces de jonction sont de formes identiques.2. Method according to claim 1, characterized in that said sections and / or said connecting pieces are of identical shapes. 3. Procédé selon la revendication 1 ou 2, caractérisé en ce que N est égal à 4, chacun desdits profilés présentant une section à angle droit et correspondant sensiblement à un quart de la section dudit noyau.3. Method according to claim 1 or 2, characterized in that N is equal to 4, each of said sections having a right angle section and corresponding substantially to a quarter of the section of said core. 4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits profilés et/ou lesdites pièces de jonction sont obtenus par pultrusion.4. Method according to any one of the preceding claims, characterized in that said sections and / or said connecting pieces are obtained by pultrusion. 5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits profilés sont constitués de fibres et de résines.5. Method according to any one of the preceding claims, characterized in that said sections are made of fibers and resins. 6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdites pièces de jonction sont des profilés présentant une section en double U ou en6. Method according to any one of the preceding claims, characterized in that said connecting pieces are profiles having a cross section in double U or in T.T. 7. Procédé selon la revendication 1, caractérisé en ce que ladite étape de renforcement comprend au moins une des étapes suivantes: (a) collage des pièces de jonction et des profilés; (b) ajout de renforts d'ancrage locaux; (c) ajout d'au moins une couche d'un matériau destiné à isoler le noyau; (d) ajout d'un film de matériau thermorétractable, et chauffage dudit matériau7. Method according to claim 1, characterized in that said reinforcing step comprises at least one of the following steps: (a) bonding of the joining pieces and of the profiles; (b) addition of local anchor reinforcements; (c) adding at least one layer of a material intended to insulate the core; (d) adding a film of heat-shrinkable material, and heating said material thermorétractable, afin d'assurer le compactage des éléments formant ladite heat-shrinkable, in order to ensure the compaction of the elements forming said structure tubulaire.  tubular structure. 8. Procédé selon la revendication 7, caractérisé en ce que le matériau formant lesdites couches isolantes comprend du verre, du carbone, de l'aramide, ou du polyéthylène HM.8. Method according to claim 7, characterized in that the material forming said insulating layers comprises glass, carbon, aramid, or HM polyethylene. 9. Structure tubulaire caractérisée en ce qu'elle comprend un noyau formé par un assemblage de N profilés, N étant supérieur ou égal à 2, chaque profilé présentant une section correspondant sensiblement à une portion de la section de ladite structure tubulaire, lesdits profilés étant solidarisés à l'aide de pièces de jonction, chacune desdites pièces de jonction solidarisant deux desdits profilés.9. Tubular structure characterized in that it comprises a core formed by an assembly of N sections, N being greater than or equal to 2, each section having a section corresponding substantially to a portion of the section of said tubular structure, said sections being joined together using junction pieces, each of said junction pieces joining two of said sections. - un matériau thermorétractable.  - a heat-shrinkable material. - au moins une couche de matériau destiné à isoler le noyau; - at least one layer of material intended to isolate the core; - des renforts d'ancrage locaux; - local anchoring reinforcements; - de la colle; - glue; 10. Structure selon la revendication 9, caractérisée en ce que ledit noyau est renforcé à l'aide d'au moins un des éléments appartenant au groupe comprenant: 10. Structure according to claim 9, characterized in that said core is reinforced with at least one of the elements belonging to the group comprising:
FR9502213A 1995-02-20 1995-02-20 Prodn. of tubular structures Pending FR2730665A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9502213A FR2730665A1 (en) 1995-02-20 1995-02-20 Prodn. of tubular structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9502213A FR2730665A1 (en) 1995-02-20 1995-02-20 Prodn. of tubular structures

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Publication Number Publication Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067079A1 (en) * 1998-06-22 1999-12-29 Beadon Cole H C A process for manufacturing fibre reinforced plastic masts, spars or columns

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Publication number Priority date Publication date Assignee Title
US2388297A (en) * 1941-07-10 1945-11-06 Extruded Plastics Inc Composite article, including extruded sections
FR1289224A (en) * 1961-05-15 1962-03-30 Plastics Ltd Ab Pipeline system and in particular rainwater descent
FR2051214A5 (en) * 1969-06-24 1971-04-02 Huyck Corp
FR2078937A5 (en) * 1970-02-23 1971-11-05 Svenska Flaektfabriken Ab
US3843429A (en) * 1970-09-18 1974-10-22 Stebbins Eng And Mfg Co Glass fiber reinforced resin tank structures and method of fabricating
FR2678971A1 (en) * 1991-07-08 1993-01-15 Andre Giraud TRANSPARENT COMPOSITE STRUCTURAL ELEMENTS AND METHODS OF MAKING SAME.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2388297A (en) * 1941-07-10 1945-11-06 Extruded Plastics Inc Composite article, including extruded sections
FR1289224A (en) * 1961-05-15 1962-03-30 Plastics Ltd Ab Pipeline system and in particular rainwater descent
FR2051214A5 (en) * 1969-06-24 1971-04-02 Huyck Corp
FR2078937A5 (en) * 1970-02-23 1971-11-05 Svenska Flaektfabriken Ab
US3843429A (en) * 1970-09-18 1974-10-22 Stebbins Eng And Mfg Co Glass fiber reinforced resin tank structures and method of fabricating
FR2678971A1 (en) * 1991-07-08 1993-01-15 Andre Giraud TRANSPARENT COMPOSITE STRUCTURAL ELEMENTS AND METHODS OF MAKING SAME.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067079A1 (en) * 1998-06-22 1999-12-29 Beadon Cole H C A process for manufacturing fibre reinforced plastic masts, spars or columns

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