FR2578026A1 - Continuous lagged tubing prodn. - Google Patents

Continuous lagged tubing prodn. Download PDF

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Publication number
FR2578026A1
FR2578026A1 FR8514868A FR8514868A FR2578026A1 FR 2578026 A1 FR2578026 A1 FR 2578026A1 FR 8514868 A FR8514868 A FR 8514868A FR 8514868 A FR8514868 A FR 8514868A FR 2578026 A1 FR2578026 A1 FR 2578026A1
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FR
France
Prior art keywords
tube
strip
edges
closed
inner tube
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.)
Withdrawn
Application number
FR8514868A
Other languages
French (fr)
Inventor
Gerhard Ziemek
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.)
Kabelmetal Electro GmbH
Original Assignee
Kabelmetal Electro GmbH
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Filing date
Publication date
Application filed by Kabelmetal Electro GmbH filed Critical Kabelmetal Electro GmbH
Publication of FR2578026A1 publication Critical patent/FR2578026A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/143—Pre-insulated pipes
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
    • B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/334—Filling the preformed spaces or cavities
    • 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
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/0681—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding created by a tool
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49—Internally supporting the, e.g. tubular, 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0015—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • B29L2023/225—Insulated

Abstract

Thermally insulated tubing is produced by applying spacers continuously to a pipe, winding a thin tape round the pipe and sealing its longitudinal edges gas-tight after applying a foaming resin (pref. based on polyurethane or polyisocyanurate) to the tape, so that when the edges are closed off the annular space formed between pipe and tape is filled with foam. The overlapping edges of the tape are sealed with frictional heat which is applied by means of a wheel which revolves at high speed.

Description

"Procédé pour la fabrication d'une conduite tubulaire isolée
thermiquement"."Process for the production of an insulated tubular pipe
thermally ".

L'invention concerne un procédé pour la fabrication d'une conduite tubulaire isolée thermiquement, dans lequel un tube est muni en continu d'un ou plusieurs écarteurs, puis une bande à paroi mince, filant lo#ngitudilement et concentriquement au tube intérieur est mise en forme pour donner un tube fendu; et dans lequel les bords longitudinaux du tube fendu sont fermés de façon étanche au gaz, étant précisé qu'avant la fermeture des bords de la bande, on rapporte sur la bande un mélange plastique moussant expansible, de préférence à base de polyuréthane ou de polyisocyanurate, qui, après la fermeture des bords de la bande du tube fendu, remplit en moussant l'espace annulaire existant entre le tube intérieur et le tube extérieur. The invention relates to a method for manufacturing a thermally insulated tubular pipe, in which a tube is continuously provided with one or more spacers, then a thin-walled strip, threading lo # ngitudilit and concentrically with the inner tube is laid shaped to give a split tube; and in which the longitudinal edges of the split tube are closed in a gas-tight manner, it being specified that before the edges of the strip are closed, an expandable foaming plastic mixture, preferably based on polyurethane or polyisocyanurate, is attached to the strip. , which, after closing the edges of the strip of the split tube, fills by foaming the annular space existing between the inner tube and the outer tube.

A partir du document DE-OS 2841934 > on connait une conduite tubulaire isolée thermiquement,du dutype mentionné au débutvdans laquelle la mousse placée sur sa face extérieure est limitée par une feuille métallique collée sur ses bords. Sur les bords de la feuille métallique on rapporte, dans la zone de recouvrement, une colle à prise lente qui colle les bords de la bande par suite de la pression de la mousse. Dans cette forme d'exécution, sur la feuille métal lique, il y a encore une bande de plastique également collée sur ses bords.Tandis que le cordon de colle de la feuille métallique n'a essentiellement pour fonction que d'améliorer la densité de diffusion de l'enveloppe, la bande de plastique reprend les forces qui apparaissent lors de l'expansion par formation de mousse. From document DE-OS 2841934> a thermally insulated tubular pipe is known, of the type mentioned at the beginning in which the foam placed on its outer face is limited by a metal sheet glued on its edges. On the edges of the metal sheet, in the overlap area, a slow setting adhesive is added which sticks the edges of the strip as a result of the pressure of the foam. In this embodiment, on the metal sheet liquefied, there is still a strip of plastic also glued on its edges. While the bead of glue of the metal sheet has essentially the function only to improve the density of diffusion of the envelope, the plastic band takes up the forces that appear during expansion by foaming.

L'invention a pour but d'améliorer le procédé mentionné au zébu5 en ce sens que les bords de la bande sont réunis l'un à l'autre de façon étanche à la pression et solidarisés mécaniquement ensemble sans apport supplémentaire de colle, avant que l'espace annulaire entre le tube intérieur et la bande ne soit rempli par la mousse. The object of the invention is to improve the process mentioned in zebu5 in the sense that the edges of the strip are joined to one another in a pressure-tight manner and mechanically joined together without additional addition of glue, before the annular space between the inner tube and the strip is not filled with foam.

On atteint ce but par le moyen que les bords, qui se recouvrent l'un l'autre, de la bande sont fermés par la chaleur de frottement apportée au moyen d'une roulette tournant à vitesse élevée. Il faut voir l'avantage essentiel de l'invention dans le fait que l'on obtient un cordon de soudage ou de collage très strictement limité, c'est-à-dire étroit et que l'on peut utiliser le procédé pour des feuilles trés minces, étant donné que, par suite de la vitesse élevée de la roulette, la chaleur nécessaire est produite par frottement sans une importante application de pression. Si l'on utilise comme bande une bande de métal ou de plastique, on peut parler d'une soudure. Sil par contre on utilise une feuille d'aluminium revêtue des deux côtés d'un copolymère, il s'agit plutôt d'un collage.La chaleur produite par le frottement fluidifie les couches de copolymère, au contact l'une de l'autre, et les collent l'une à l'autre. This object is achieved by the means that the edges, which overlap each other, of the strip are closed by the heat of friction provided by means of a wheel rotating at high speed. The essential advantage of the invention must be seen in the fact that a very strictly limited, that is to say narrow, welding or bonding bead is obtained and that the process can be used for sheets. very thin, since, due to the high speed of the roller, the necessary heat is produced by friction without a significant application of pressure. If a metal or plastic strip is used as a strip, we can speak of a weld. If, on the other hand, an aluminum foil coated on both sides with a copolymer is used, it is rather a bonding. The heat produced by the friction fluidizes the layers of copolymer, in contact with one another. , and stick them together.

Il est particulièrement avantageux d'utiliser comme tube intérieur un tube métallique ondulé, de préférence en cuivre ou en acier inoxydable. Une conduite tubulaire isolée thermiquement} fabriquée selon ce procédéssest très flexible et peut s'enrouler sur des tourets, comme un câble électrique et également se poser comme un câble électrique. De telles conduites trouvent) par exemple) application sous forme de conduites de chauffage à distance et se caractérisent par le fait que l'on peut poser d'une seule pièce de grandes longueurs sans devoir exécuter de plus importants travaux de liaison de raccordement. Le procédé conforme à l'invention peut également s'appliquer lorsque comme tube intérieur on utilise un tube de cuivre étiré sans soudure et adouci par recuit.De telles conduites trouvent application dans la technique d'installation, par exemple comme conduite de liaison entre une chaudière à eau chaude et les points de puisage ou aussi comme liaison entre la chaudière du chauffage central et les radiateurs. Dans les deux cas d'application > ilest apparu comme particulièrement favorable d'utiliser comme bande une feuille d'aluminium revêtue des deux côtés d'un copolymère. Ceci présente l'avantage que, par rapport au plastique, l'enveloppe extérieure est étanche à la diffusion, ce qui'une part, interdit la pénétration de l'humidité de l'extérieur dans la couche isolante, mais d'autre part, interdit également une migration de l'agent moteur hors de la couche de plastique moussant, ce qui dégraderait le pouvoir d'isolation thermique du produit moussant. It is particularly advantageous to use as an inner tube a corrugated metal tube, preferably copper or stainless steel. A thermally insulated tubular pipe} produced by this process is very flexible and can be wound on reels, like an electric cable and also can be laid like an electric cable. Such pipes find) for example) application in the form of district heating pipes and are characterized by the fact that one can lay in one piece of great lengths without having to carry out more important work of connection connection. The process according to the invention can also be applied when an internal tube is used which is a copper tube drawn without welding and softened by annealing. Such pipes find application in the installation technique, for example as a connection pipe between a hot water boiler and draw-off points or also as a connection between the central heating boiler and the radiators. In both cases of application> it appeared to be particularly favorable to use as a strip an aluminum sheet coated on both sides with a copolymer. This has the advantage that, compared to plastic, the outer envelope is impermeable to diffusion, which on the one hand prevents the penetration of moisture from the outside into the insulating layer, but on the other hand, Also prohibits migration of the motive agent out of the foaming plastic layer, which would degrade the thermal insulation power of the foaming product.

La faible conductibilité thermique du produit moussant est conservée pendant un temps plus long par application de la feuille d'aluminium.The low thermal conductivity of the foaming product is retained for a longer time by application of the aluminum foil.

Il est par ailleurs apparu intéressant qu'après la fermeture des bords de la bande, on place sur le tube extérieur, par extrusion, une enveloppe extérieure en matériau thermoplastique. Cette enveloppe de plastique ne sert essentiellement que comme protection à l'égard de la corrosion pour la feuille d'aluminium etc de ce fait, peut être extrêmement mince. S'il faut placer dans le sol un tube fabriqué selon le procédé conforme à l'enseignement -de 1 'in- vention, il est recommandé de prévoir une enveloppe extérieure d'une épaisseur de paroi un peu plus grande.Dans le cas où l'on utilise comme bande une feuille d'aluminium revêtue d'un copolymère, le caractère de l'apport par extrusion présente encore l'avantage que, du fait de la chaleur de l'extrusion, la couche de copolymère, côté intérieur, se colle à la mousse voisine et que d'un autre côté aussi la couche de copolynère, côté extérieur, se colle à l'enveloppe thermoplastique. Ceci intervient favorablement sur l'étanchéité à l'eau, selon la direction longitudinale, de la conduite tubulaire. C'est un avantage particulier de placer par extrusion sur le tube extérieur une enveloppe conçue avec des nervures en saillie vers l'extérieur. On peut ainsi économiser du matériau pour l'enveloppe extérieure. It has also appeared advantageous that after the edges of the strip have been closed, an outer casing made of thermoplastic material is placed on the outer tube, by extrusion. This plastic wrap essentially only serves as corrosion protection for the aluminum foil etc. therefore can be extremely thin. If it is necessary to place in the ground a tube manufactured according to the method in accordance with the teaching of the invention, it is recommended to provide an outer casing with a slightly greater wall thickness. an aluminum foil coated with a copolymer is used as the strip, the nature of the contribution by extrusion also has the advantage that, due to the heat of the extrusion, the layer of copolymer, on the inner side, sticks to the neighboring foam and that on the other side also the co-polymer layer, on the outside, sticks to the thermoplastic envelope. This acts favorably on the water tightness, in the longitudinal direction, of the tubular pipe. It is a particular advantage to place an envelope designed with ribs projecting outward on the outer tube by extrusion. This can save material for the outer shell.

On explique en détail l'invention à l'aide des exemples d'exécution schématiquement représentés sur les figures 1 à 4. The invention is explained in detail using the execution examples schematically represented in FIGS. 1 to 4.

Un tube intérieur 2 déroulé d'une bobine de stockage lj est enrubanné en continu avec un écarteur 3, de préférence en cordon de produit moussant. Une bande 5 est extraite en continu d'une bobine 4 et elle est mise en forme autour de l'écarteur 3 pour donner un tube fendu 6 dont les bords de la bande se recouvrent. Avant la fermeture des bords de la bande, on pulvérise, à l'aide d'un pistolet de pulvérisation 7, un mélange plastique donnant une mousse expansive, à base de polyuréthane ou de polyisocyanurate, qui, après la fermeture des bords de la bande, remplit l'espace annulaire situé entre le tube fendu 6 et le tube intérieur 2. An inner tube 2 unwound from a storage reel 1j is continuously wrapped with a spacer 3, preferably in a bead of foaming product. A strip 5 is continuously extracted from a reel 4 and it is shaped around the spacer 3 to give a split tube 6 whose edges of the strip overlap. Before closing the edges of the strip, a plastic mixture giving an expansive foam, based on polyurethane or polyisocyanurate, is sprayed using a spray gun 7, which, after closing the edges of the strip , fills the annular space between the split tube 6 and the inner tube 2.

La fermeture du bord de la bande est opérée par une roulette à frottement 8 qui tourne à vitesse élevée et produit la chaleur nécessaire au soudage ou au collage sans application notable de pression. Après la fermeture du bord de la bande et le remplissage de l'espace annulaire par le produit mousse, on produit sur le tube fendu 6, à l'aide d'une extrudeuse 9, une enveloppe extérieure 10 en matériau thermoplastique. Après prise de l'enveloppe plastique 10, on peut soit enrouler sur des tourets à câble le tube terminé, soit le couper à longueur. En ce qui concerne la roulette 8, il s'agit d'une roulette en résine synthétique dans laquelle sont insérés des matériaux de renfort. La roulette 8 a un diamètre d'environ 6 cm, indépendamment du diamètre du tube 6 à souder.La roulette est entrainée à une vitesse de
rotation supérieure à 5000 tours/minute, de préférence de
l'ordre de grandeur de 25000 tours/minute . Cette vitesse
de rotation élevée permet un apport de la chaleur de frot
tement nécessaire sans application importante de pression.The edge of the strip is closed by a friction roller 8 which rotates at high speed and produces the heat necessary for welding or bonding without significant application of pressure. After closing the edge of the strip and filling the annular space with the foam product, an outer casing 10 made of thermoplastic material is produced on the split tube 6, using an extruder 9. After taking of the plastic envelope 10, the finished tube can either be wound on cable reels or cut to length. As far as caster 8 is concerned, it is a caster made of synthetic resin into which reinforcing materials are inserted. The caster 8 has a diameter of approximately 6 cm, regardless of the diameter of the tube 6 to be welded. The caster is driven at a speed of
rotation greater than 5000 rpm, preferably
the order of magnitude of 25,000 rpm. This speed
high rotation allows a supply of frot heat
much necessary without significant application of pressure.

La figure 2 représente un détail de la
figure 1, à échelle agrandie. On peut voir clairement que
le cordon de soudage ou de collage 11 est à tolérance très
précise dans la zone des bords de bande en recouvrement.Figure 2 shows a detail of the
Figure 1, on an enlarged scale. We can clearly see that
the welding or bonding bead 11 is very tolerable
precise in the area of overlapping strip edges.

Les figures 3 et 4 représentent deux exemples
d'exécution de conduites tubulaires isolées thermiquement
fabriquées selon le procédé conforme à l'invention. La
figure 3 représente ce que l'on appelle un câble de chauf
fage à distance dans lequel le tube intérieur 2 est conçu
sous forme d'un tube métallique, de préférence en acier
inoxydable, soudé longitudinalement et ondulé. L'écarteur
3, en forme de spirale, est en polyuréthane à mousse expansée,
ainsi que la couche d'isolation 12. La bande 5 est une
feuille d'aluminium revêtue d'un copolymère d'une épaisseur
de 0,2 mm. La gaine extérieure 10 estwde préférence en polyéthylène.Figures 3 and 4 show two examples
execution of thermally insulated tubular pipes
manufactured according to the process according to the invention. The
Figure 3 shows what is called a heating cable
remote fage in which the inner tube 2 is designed
in the form of a metal tube, preferably steel
stainless, longitudinally welded and wavy. The spreader
3, in the form of a spiral, is made of polyurethane with expanded foam,
as well as the insulation layer 12. The strip 5 is a
aluminum foil coated with a thick copolymer
0.2 mm. The outer sheath 10 is preferably made of polyethylene.

Dans le cas du tube de la figure 4, il
s'agit d'un tube d'installation isolé thermiquement, cons
titué d'une tube cuivre 2 étiré sans soudure, de l'écarteur 3 en polyuréthane à mousse expansée, de la couche d'isolation thermique 12 à base de mousse de polyisocyanurate,
d'une feuille d'aluminium 5 revêtue de copolymère et d'une
épaisseur d'environ 0, 1 mm et de l'enveloppe extérieure
10, de préférence en polychlorue de vinyle dense. L'enve
loppe extérieure 10 présente ici des nervures 13 en saillie
vers l'extérieur grâce auxquelles il faut, au total, moins
de matériau pour l'enveloppe. Les nervures 13 ne doivent
pas se répartir sur toute la périphérie de l'enveloppe
extérieure 10, de façon qu'il subsiste un champ courant
dans la direction longitudinale du tube et que l'on peut
employer pour des inscriptions, par exemple le nom de la société, le nom du produit etc.In the case of the tube of Figure 4, it
this is a thermally insulated installation tube, cons
made up of a seamless drawn copper tube 2, of polyurethane spacer 3 with expanded foam, of thermal insulation layer 12 based on polyisocyanurate foam,
aluminum foil 5 coated with copolymer and a
thickness of about 0.1 mm and of the outer casing
10, preferably made of dense polyvinyl chloride. Envy
outer lope 10 here has ribs 13 projecting therefrom
outward thanks to which, in total, less
material for the envelope. The ribs 13 should not
not spread over the entire periphery of the envelope
exterior 10, so that a current field remains
in the longitudinal direction of the tube and that we can
use for inscriptions, eg company name, product name etc.

On peut sans difficulté cintrer les conduites tubulaires fabriquées selon le procédé conforme à l'invention, sans qu'il y ait à craindre que le cordon de collage ou de soudage ll se déchire. Ce cordon est si solide qu'il peut résister, sans soutien supplémentaire de l'extérieur, à la pression exercée par l'isolation thermique 12 lors de l'expansion de la mousse.  It is without difficulty to bend the tubular conduits produced according to the process according to the invention, without there being any fear that the bonding or welding bead ll will tear. This cord is so solid that it can withstand, without additional support from the outside, the pressure exerted by thermal insulation 12 during the expansion of the foam.

Claims (6)

REVENDICATIONS 10) Procédé pour la fabrication d'une conduite tubulaire isolée thermiquement, dans lequel un tube est muni en continu d'un ou de plusieurs écarteurs, puis une bande à paroi mince, filant longitudinalement et concentriquement au tube intérieur est mise en forme pour donner un tube fendu; et dans lequel les bord longitudinaux du tube fendu sont fermés de façon étanche au gaz, étant précisé qu'avant la fermeture des bords de la bande, on rapporte sur la bande un mélange plastique moussant expansible, de préférence à base de polyuréthane ou de polyisocyanurate, qui, après la fermeture des bords de la bande du tube fendu, remplit en moussant l'espace annulaire existant entre le tube intérieur et le tube extérieur, caractérisé en ce que le bords, qui se recouvrent l'un l'autre, de la bande sont fermés par la chaleur de frottement apportée au moyen d'une roulette (8) tournant à vitesse élevée. 10) Method for manufacturing a thermally insulated tubular pipe, in which a tube is continuously provided with one or more spacers, then a thin-walled strip, spinning longitudinally and concentrically with the inner tube is shaped to give a split tube; and in which the longitudinal edges of the split tube are closed in a gas-tight manner, it being specified that before the edges of the strip are closed, an expandable foaming plastic mixture, preferably based on polyurethane or polyisocyanurate, is attached to the strip. , which, after closing the edges of the strip of the split tube, fills with foam the annular space existing between the inner tube and the outer tube, characterized in that the edges, which overlap each other, of the strip are closed by the friction heat supplied by means of a roller (8) rotating at high speed. 20) Procédé selon la revendication 1, caractérisé en ce que) commue tube intérieur,on utilise un tube métallique ondulé (2), de préférence en cuivre ou en acier inoxydable. 20) Method according to claim 1, characterized in that) commue inner tube, using a corrugated metal tube (2), preferably copper or stainless steel. 30) Procédé selon la revendication 1, caractérisé en ce que ,comme tube intérieur. on utilise un tube de cuivre (2) étiré sans soudure et adouci par recuit. 30) Method according to claim 1, characterized in that, as an inner tube. a copper tube (2) drawn without welding and softened by annealing is used. 40) Procédé selon l'une des revendications 1 à 3, caractérisé en ce que,comme bande (5) > on utilise une feuille d'aluminium revêtue des deux côtés d'un copolymère. 40) Method according to one of claims 1 to 3, characterized in that, as strip (5)> using an aluminum foil coated on both sides with a copolymer. 50) Procédé selon l'une des revendications là 4, caractérisé en ce,qu'après la fermeture des bords de la bande on place sur le tube extérieur, par extrusion, une enveloppe extérieure (10) en matériau thermoplastique. 50) Method according to one of claims there 4, characterized in that after closing the edges of the strip is placed on the outer tube, by extrusion, an outer casing (10) of thermoplastic material. 60) Procédé selon la revendication 5, caractérisé en ce qu'on place, par extrusion sur le tube extérieur une enveloppe (10) conçue avec des nervures (13) en saillie vers l'extérieur.  60) Method according to claim 5, characterized in that an envelope (10) designed with ribs (13) projecting outwards is placed by extrusion on the outer tube.
FR8514868A 1985-02-22 1985-10-08 Continuous lagged tubing prodn. Withdrawn FR2578026A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853506144 DE3506144A1 (en) 1985-02-22 1985-02-22 Process for producing a heat-insulated line pipe

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JP (1) JPS61195812A (en)
KR (1) KR860006662A (en)
CN (1) CN85107655A (en)
BE (1) BE904236A (en)
DE (1) DE3506144A1 (en)
DK (1) DK73186A (en)
FR (1) FR2578026A1 (en)
IT (1) IT1186153B (en)
NL (1) NL8600445A (en)
SE (1) SE8600746L (en)

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Publication number Priority date Publication date Assignee Title
EP1520675A1 (en) * 2003-05-02 2005-04-06 ALSTOM Power FlowSystems A/S A procedure for the manufacture of foam insulated pipes
WO2006020615A1 (en) * 2004-08-13 2006-02-23 Perma-Pipe, Inc. Method and system for cast molding a fluid conduit
WO2012002834A1 (en) 2010-06-28 2012-01-05 Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" Method for manufacturing a thermally insulated flexible tube
WO2012039638A1 (en) 2010-09-20 2012-03-29 Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" Line for manufacturing a heat-insulated flexible pipe
EP2604905A1 (en) * 2011-12-14 2013-06-19 herotec GmbH Flächenheizung Insulated pipe

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NL1015760C2 (en) * 2000-07-20 2002-01-24 Thermaflex Internat Holding B Method and device for manufacturing insulated pipe.
IT1398739B1 (en) * 2010-03-10 2013-03-18 Euroidraulica Srl PROCESS FOR THE PRODUCTION OF COATED TUBES AND PRODUCT REALIZED WITH SUCH PROCESS
KR101298656B1 (en) * 2011-03-30 2013-08-21 한국지역난방공사 Shape tube for district heating heat pipe having shear control ring
CN104339612B (en) * 2014-11-03 2017-06-20 安徽天元电缆有限公司 A kind of cable annealing extrusion all-in-one
CN109263095A (en) * 2018-11-21 2019-01-25 天津市锦业科技有限公司 Multifunctional polyurethane is continuously poured polytene heat-insulation pipe production line

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US3418196A (en) * 1963-02-22 1968-12-24 Luc Jane Method of sealing materials together by a rubbing treatment and articles produced thereby
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Publication number Priority date Publication date Assignee Title
EP1520675A1 (en) * 2003-05-02 2005-04-06 ALSTOM Power FlowSystems A/S A procedure for the manufacture of foam insulated pipes
WO2006020615A1 (en) * 2004-08-13 2006-02-23 Perma-Pipe, Inc. Method and system for cast molding a fluid conduit
US7824595B2 (en) 2004-08-13 2010-11-02 Perma-Pipe, Inc. Method and system for cast molding a fluid conduit
WO2012002834A1 (en) 2010-06-28 2012-01-05 Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" Method for manufacturing a thermally insulated flexible tube
WO2012039638A1 (en) 2010-09-20 2012-03-29 Общество С Ограниченной Ответственностью "Cmиt-Яpцebo" Line for manufacturing a heat-insulated flexible pipe
EP2604905A1 (en) * 2011-12-14 2013-06-19 herotec GmbH Flächenheizung Insulated pipe

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IT1186153B (en) 1987-11-18
JPS61195812A (en) 1986-08-30
SE8600746D0 (en) 1986-02-19
DK73186A (en) 1986-08-23
DE3506144A1 (en) 1986-08-28
NL8600445A (en) 1986-09-16
SE8600746L (en) 1986-08-23
DK73186D0 (en) 1986-02-14
BE904236A (en) 1986-08-18
IT8523311A0 (en) 1985-12-20
KR860006662A (en) 1986-09-13
CN85107655A (en) 1987-04-22

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