EP1973673A1 - Procede d'application uniforme d'un revetement sur une paroi tubulaire - Google Patents

Procede d'application uniforme d'un revetement sur une paroi tubulaire

Info

Publication number
EP1973673A1
EP1973673A1 EP07702624A EP07702624A EP1973673A1 EP 1973673 A1 EP1973673 A1 EP 1973673A1 EP 07702624 A EP07702624 A EP 07702624A EP 07702624 A EP07702624 A EP 07702624A EP 1973673 A1 EP1973673 A1 EP 1973673A1
Authority
EP
European Patent Office
Prior art keywords
coating
tubular wall
channel
materials
coating device
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Withdrawn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
EP07702624A
Other languages
German (de)
English (en)
Inventor
Lochte Wilfried
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP1973673A1 publication Critical patent/EP1973673A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/001—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work incorporating means for heating or cooling the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0241—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to elongated work, e.g. wires, cables, tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • 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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
    • F16L58/109—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being an extruded layer
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/021—Apparatus for spreading or distributing liquids or other fluent materials already applied to the surface of an elongated body, e.g. a wire, a tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2254/00—Tubes
    • B05D2254/02—Applying the material on the exterior of the tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12292—Workpiece with longitudinal passageway or stopweld material [e.g., for tubular stock, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
    • Y10T428/1359—Three or more layers [continuous layer]

Definitions

  • the invention relates to a method for the uniform application of a coating of reactive coating materials, preferably polyurethane components, on tubular walls and a coating device and a composite tube produced with the coating device.
  • a coating of reactive coating materials preferably polyurethane components
  • the composite pipes produced by the process may consist of an inner metal pipe, for example steel pipe, or of a GRP, PE or polyolefin pipe, onto which polyurethane is applied for bonding to further outer layers.
  • the polyurethane is said to be permanently elastic and compressible and is used to thermally insulate the tubular wall.
  • the outer layer may additionally be wrapped with a particularly thin aluminum foil.
  • the aluminum foil in this case represents a barrier for the substances diffusing through the PE.
  • Pipes designed in this way are used, for example, for supply lines, in particular district heating pipes.
  • the PE pipes are produced in a working process, for example by extruding and wound in large lengths on drums.
  • thermally insulated conduit and a method for its preparation is known. It is a longitudinally welded pipe having an inner and outer tube and arranged between the inner and outer tube heat insulating layer of foamed plastic.
  • the method used here is quite complicated and expensive.
  • EP 0 567 667 A1 discloses an extruded plastic-metal composite pipe for installation purposes which has a plastic outer layer and a reinforcing layer between the plastic inner pipe and the outer layer.
  • DE 195 07 224 A1 also discloses a method and a device for producing a multi-layer plastic composite tube in which the edges of the metal foil overlap and the foil layers lying metallically on one another in the overlapping region are welded by means of electrode irradiation.
  • the present invention has for its object to provide a method and a coating device with a uniform coating of tubular walls is possible and show a composite tube, which has the required conditions of a uniform outer coating for further processing.
  • the tubular wall is fed continuously into a coating device into which coating materials are fed to at least one dead volume-free distribution channel, which opens towards the tubular wall and merges into a coating channel in the transport direction, the coating materials entering the coating channel Flow into the distribution channel and pass from this on the surface of the tubular wall and until solidification in be kept in a narrow space.
  • the tubular wall which is to be provided with the coating is fed continuously to the coating apparatus, at the same time the coating materials are supplied via at least one dead volume-free distribution channel, which opens towards the tubular wall and merges into a coating channel in the transport direction. It is important that the coating materials flow dead volume-free into the distribution channel. Under dead volume is understood to mean a volume in which no vortex and no stoppages of volume elements occur to ensure that no residual materials adhere to the walls and optionally curing. Therefore, the flow profile should be as progressive as possible, that is, the flow rate during the transport of the reactants, at least consistent, should be better continuous, increasing.
  • the distribution channel in the form of an annular groove is constructed so that, taking into account the expansion upon reaction of the reactants, the annular groove first in the passage opening for the tubular wall to be coated expands and then in a defined gap-shaped coating channel, which is slightly larger than the tubular wall, passes.
  • the coating channel tapers slightly conically in the transport direction of the tubular wall, wherein at the same time a partial curing of the polyurethane mixture takes place within the conically tapered coating channel.
  • a coating takes place on the outside of the tubular wall.
  • a release agent in the coating channel is fed.
  • the coating materials used are preferably monomeric materials which are mixed with one another immediately before being fed into the distribution channel or in the distribution channel. This ensures that premature curing is prevented and thus blockage of the annular groove or the coating channel occurs.
  • the coating materials are fixed on the tubular wall during the coating process over a longer period, which is determined by the length of the coating channel and the transport speed of the tubular wall.
  • the peculiarity of the indicated production method is that the coating materials are fixed during the coating process over a longer period on the tubular wall, which is done for example by the cylindrical or in particular the conical taper of the coating channel. As far as a cylindrical coating channel is used, fixing also takes place on the tubular wall in order to harden the reactive coating materials in the available space.
  • foaming materials the gap between the coating device and the tubular wall is completely filled due to gas formation and expansion.
  • the period of time for coating is predetermined by the transport speed of the tubular wall and the length of the coating device with coating channel to ensure that with the exit of the tubular wall from the coating device, the curing of the coating materials has progressed so far that a further change in volume no longer takes place.
  • the coating material flexible and sham materials having different bulk densities or non-foaming materials in filled or unfilled form can be used.
  • a filler for example, talc or a glass fiber in question, wherein the glass fiber additionally leads to the reinforcement and stiffening of the coating materials.
  • the coating materials (reactants) are in this case mixed with pressures of 50 to 200 bar counterflow principle outside of the coating apparatus in a metering and introduced at high pressure in the distribution channel, so that at the same time ensures that as possible no coating materials adhere to the surfaces and optionally a blockage can bring about to increase the life of the coating device.
  • the reaction rate and thus the setting of the coating materials is additionally influenced by cooling or heating.
  • the withdrawal speed of the tubular walls in the coating channel is matched to the discharge capacity of the metering machine and maintained approximately constant during the coating process, so that a slight suction is built up due to the passage of the tubular wall to be coated thickened the tapered caliber of the coating head, with it and pulls as a result of further coating material from the reaction chamber or annular groove.
  • a coordination of the flow rate as well as the profile of the distribution channel and the tapering caliber is to be carried out in individual cases for the different polyurethane mixtures.
  • Foaming cell-like or non-foaming noncellular coating materials are particularly suitable as coating materials.
  • the coating is carried out at a temperature of 35 to a maximum of 60 degrees, whereby particular care is taken to ensure that the polyurethane foam does not get too hot, thus for the special case of a subsequent coating with aluminum foil, which is placed around the pipe and thus creates a longitudinal seam Aluminum does not stretch too much.
  • a coating takes place in a layer thickness of 0.4 to 2 mm, preferably 0.6 to 1, 2 mm and is applied by the coating device according to the invention in the desired layer thickness with low tolerances.
  • a tempering liquid can be used during the coating process, which makes it possible, with appropriate reaction, to set the polyurethane mixture under cooling or to accelerate the setting process under heat as well. Decisive for the success of the process to be carried out is also the formation of the coating channel, which must be correspondingly large and long dimensioned.
  • the optionally wound up tubular wall is stretched and straightened.
  • the surface of the tubular wall can be activated, for example, in polyolefins by heat or sparking.
  • a coating device for carrying out the method, into which a tubular wall can be fed via an inlet opening and emerges from an outlet opening after coating and the coating materials flow into a distribution channel and from there into a coating channel, wherein the coating channel is formed by a slit-shaped Space between the surface of the tubular wall and the coating device is predetermined.
  • the coating device initially consists of an inlet opening in which the tubular wall is held centrically by positive locking and transported in the direction of the coating channel until it emerges from the outlet opening again.
  • the distribution channel consists of an inner annular groove, wherein the inner diameter widens from the annular groove in the transport direction of the tubular wall to the cross section of the coating channel. It is important to ensure that the cross section of the coating channel is adjusted on the output side to the desired thickness of the layer to be applied.
  • the to be applied Layer thickness can be given for this purpose, for example, by a constant cross-section or by a tapered in the direction of the outlet opening cross-section. This is preferably done by an exchangeable caliber which can be pressed into the outlet opening, pushed or screwed to determine the inside diameter of the cross section of the coating channel.
  • This has the advantage that tubular walls with different diameters and different layer thicknesses can be coated by simply replacing the respective caliber.
  • tubular walls are metal pipes, especially steel pipes or flexible plastic pipes, such as polyolefin or PE pipes in question. Metal pipes are processed here in existing lengths, while flexible plastic pipes are usually processed in a wound form.
  • the flexible tubes are supplied wound on bearing rollers, so that first a straightening and stretching of the tubular walls is necessary.
  • the surface can be activated by heat or by sparking before the tubular walls are passed through the coating device. By prior activation of the surface, a particularly good adhesion of the coating materials on the surface of the tubular walls, in particular the polyolefin tubes, is achieved.
  • the front end of the tubular wall is first centered by positive engagement in the coating device.
  • a centering is provided, which preferably consists of at least three offset by 120 ° arranged sliding guides.
  • the single slide consists for example of a screw with ball or roller and compression spring, the ball or roller rests against the tubular wall and holds them centrally in the coating device.
  • the caliber of a non-adhesive plastic for example Teflon or a material, for example pure nickel, consist whose adhesion is less than the cohesive force of the coating materials used, so as possible no buildup and thus a blockage of the Coating channels prevented or at least delayed.
  • the feed of a release agent or a film is provided.
  • a further supply for a release agent, or a film wherein the supply consists of a second supply channel, a branch channel and an inner trough-shaped depression in caliber.
  • a cooling and / or heating is provided coaxially to the coating channel in order to subsequently influence the reaction rate of the coating materials.
  • the possibility at the outlet opening to provide a channel for a bath with which also the reaction of the coating material can be influenced.
  • the coating device has a plurality, preferably three, circumferentially distributed feed channels for the distribution channel, so that the coating materials, for example polyurethane components, enter the distribution channel quickly and without dead volume.
  • the essential advantage of the coating apparatus and the method used is a very exact adherence to the predetermined layer thickness. This is necessary, for example, to overlap a longitudinally seamed aluminum foil. For larger layer thickness variations, this would, for example, lead to the fact that possibly the aluminum strip does not completely surround the tubular wall.
  • the aluminum foil after which it is glued on a permanently elastic polyurethane layer around the polyethylene tube, is structured. For this purpose, for example, a helical depression can be introduced around the tube, wherein the spacing of the grooves in the expansion direction of the tube is about 5 mm.
  • the grooves are in the heated state of Therefore, care must be taken to ensure that the temperature does not exceed certain values, because otherwise the depressions which are introduced into the layer structure are drawn back smooth by subsequent cooling due to temperature-induced shrinkage.
  • Further layers of the finished conduit follow, for example, a polyurethane foam layer several centimeters thick and, in turn, a layer of, for example, black, corrugated polyethylene.
  • the individual coating materials can additionally be provided with a reinforcing material reinforcement, for example glass fabric or hard celluloses or non-cellulosic material.
  • a composite pipe produced by the method with the aid of the coating device consists of a tube core made of metal or plastic, for example polyolefin, preferably polyethylene, wherein polyurethane is applied for bonding with further layers, in particular the outer layer, which is permanently elastic and compressible in a special version can be wrapped with a thin aluminum foil.
  • the composite pipe formed in this way can be further structured after bonding the aluminum foil to the polyurethane layer, preferably with a helical depression, wherein the spacing of the grooves in the expansion direction of the tubular wall is about 2 mm to 5 cm, preferably 5 mm to 1 cm.
  • a polymer foam layer several centimeters thick is applied to the aluminum foil, which is intended essentially for insulation. Subsequently, the application of a corrugated polyethylene layer on the polymer foam layer to prevent damage to the tubular wall.
  • FIG. 2 is a sectional top view of the coating apparatus according to FIG. 1, FIG.
  • FIG. 3 is a sectional side view of the coating device according to the invention according to Figure 1 with a tubular wall
  • Fig. 5 in a sectional side view of an inventive composite pipe in three detailed individual views and
  • Fig. 6 shows two different calibers for use with the coating device according to the invention.
  • FIG. 1 shows a coating device 1 according to the invention which has an inlet opening 2 and an outlet opening 3.
  • a plurality of centering 4 are provided, which are circumferentially distributed, preferably offset by 120 °, respectively.
  • the centering device 4 consists of an adjusting screw 5 and a ball. 6 with compression spring 7.
  • a roller for the ball 6 can be used.
  • the inlet opening 2 is selected in terms of size so that different tubular walls can be supplied and held due to the adjustable centering device 4.
  • a caliber 11 is added on the opposite side of the inlet opening 2 .
  • the caliber 11 is designed replaceable and can be held for example by a press fit or a thread and determines the outer diameter of the coating by the inner diameter.
  • the coating device 1 In the middle of the coating device 1 there is an internal distribution channel 12, which is fed by a plurality of circumferentially distributed, preferably three feed channels 13. Via the feed channels 13, the reactive coating component is supplied.
  • the coating materials (reactants) are in this case mixed with pressures of 50 to 200 bar counterflow principle outside the coating apparatus 1 in a metering and introduced at high pressure in the distribution channel 12, so that it is simultaneously ensured that as possible no coating materials adhere to the surfaces and optionally can cause a blockage in order to increase the service life of the coating device 1.
  • By the geometry of the distribution channel and the intended pressure is ensured according to the invention that a dead volume free space is formed in which in particular no residues of the coating materials can adhere to the walls. This is ensured, for example, by the high pressure feed.
  • the coating channel 14 is formed with respect to the cross section through the inserted tubular wall and the inner diameter of the caliber 11.
  • the inner diameter is in this case selected so that the cross section is selected at least on the output side according to the layer thickness to be applied, wherein the inner diameter of the caliber 11 formed larger and larger, is as the inner diameter of the inlet opening 2.
  • the caliber 11 may have a constant inner diameter, so that there is a cylindrical cross-section over the entire distance.
  • the inner diameter of the caliber 11 tapers towards the exit side and thus an additional compression of the applied coating materials, for example in foam products, occurs.
  • the caliber 11 is designed to be interchangeable, so that different layer thicknesses can be applied with a coating device 1.
  • a second supply channel 17 is further provided for a release agent.
  • the feed channel 17 merges into a branch channel 18, which ends in a trough-shaped recess 19.
  • the recess 19 is provided on the inside of the caliber 11 and is located in the immediate vicinity of the distribution channel 12, thus the release agent is applied directly to the outer surface of the coating material and prevents adhesion to the inside of the caliber.
  • an externally applied tempering device 15 is provided in a further rotation, which, for example, enables cooling or heating of the coating device 1 and thus influences the hardening of the coating materials.
  • the tempering device is sealed by seals 8, 9 relative to the housing 16 of the coating device 1.
  • the length of the caliber 11 was chosen so that taking into account the transport speed of the tubular wall at the time of exit from the coating apparatus 1, a solidification of the coating materials has already occurred and thus the intended outer diameter of the tubular wall is maintained very precisely with a preselected layer thickness.
  • a wrapping of the tubular wall with an aluminum foil in the form of a longitudinal strip which is adapted to the diameter of the tubular wall with Be Mrs- material.
  • a spiral winding can take place.
  • the coating device 1 can also be seen from a sectional top view, with three centering passages 4 offset by 120 ° and three supply channels 13 offset by 120 °, which are in turn offset by 60 ° relative to the centering devices 4. are net.
  • the centering devices 4 consists of the already apparent from Figure 1 screw 5, a compression spring 7 and a voltage applied to the tubular wall ball 6, while the feed channel 13 tapers in the direction of the distribution channel 12 and is provided for pressing the coating materials.
  • the clear width of the coating device 1 is determined by the inserted on the exit side caliber 11, which is replaced according to the layer thickness to be selected.
  • the number of supply channels 13 and the centering devices 4 can be increased if necessary.
  • FIG. 2 shows by way of example only a first exemplary embodiment.
  • FIG. 3 shows the coating apparatus 1 already known from FIG. 1, in which a tubular wall 20, for example, a PE pipe rests. From this sectional side view of the coating channel 14 and the central storage of the tubular wall 20 can be seen very clearly.
  • the tubular walls 20, as far as they are made of plastic, are usually supplied in a wound-up form, so that beforehand a straightening and stretching of the tubular wall 20 is required before they are introduced into the coating device 1.
  • the recording and centering of the tubular wall 20 takes place in the coating device 1 through the centering 4, so that a uniform gap formation around the tubular wall 20 with a predetermined layer thickness corresponding to the selected caliber 11 is present.
  • the reactive coating materials are supplied via the feed channel 13 into the distribution channel 12 at a pressure of up to 200 bar and from there into the coating channel 14.
  • the length of the coating channel 14 is determined by the caliber 11 and determined so that, taking into account the transport speed Curing of the coating materials in the coating channel 14 already occurs and, when the tubular wall 20 leaves the outlet opening 3, the coating materials have hardened to such an extent that the predetermined layer thickness is maintained very precisely.
  • FIG. 4 shows, in a sectional plan view, the coating device 1 according to FIG. 3 with the tubular wall 20 inserted.
  • FIG. 5 shows a composite pipe 30 according to the invention, which is produced from a tubular wall 31.
  • the composite pipe 30 according to the invention is shown in Figures 5.1, 5.2 and 5.3 in several individual manufacturing steps.
  • To the tubular wall 31 is a polyurethane layer in a first step
  • the aluminum foil 32 coated with the coating device described and then takes place an envelope with an aluminum foil 33.
  • the aluminum foil Preferably, the aluminum foil
  • the aluminum layer 33 is applied in the form of a very thin layer which is shown somewhat thicker in order to better represent it.
  • the aluminum layer 33 has on its surface helical depressions 34, so that tearing of the aluminum foil 33 is prevented for further processing.
  • a polymer foam layer 35 which may be several centimeters thick, is applied around the aluminum foil 33.
  • a corrugated layer 36 preferably made of polyethylene, is wound up, which is intended to prevent damage to the composite pipe 30 as a protective layer.
  • FIG. 6 shows two partial figures 6.1. and 6.2 different embodiments of a caliber 40, 41, as it can be pressed or screwed in the coating device 1.
  • Both caliber 40, 41 show an axially symmetrical outer surface 42, 43, while the inner surface 44 is formed straight in the caliber 40 and the inner surface 45 in the caliber 41 has a conical shape.
  • the caliber 40, 41 can be used in exchange in the coating device in order to achieve a desired compression of the polyurethane layer.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé d'application uniforme d'un revêtement en matériaux réactifs, de préférence en composants de polyuréthane, sur des parois tubulaires (20), ainsi qu'un dispositif de revêtement et le tube composite fabriqué avec ce dernier. Pour appliquer une couche d'épaisseur uniforme, il est prévu selon l'invention de faire avancer en continu la paroi tubulaire (20) dans un dispositif de revêtement (1) dans lequel les matériaux de revêtement sont apportés à au moins un canal de répartition qui débouche contre la paroi tubulaire (20) et qui se prolonge dans la direction du transport par un canal de revêtement (14). Les matériaux de revêtement s'écoulent dans le canal de répartition (12) sans laisser de volume mort et de là, passent sur la surface de la paroi tubulaire (20) et sont maintenus dans un espace étroitement limité jusqu'à leur solidification. Ces dispositions garantissent qu'en fonction de la vitesse de transport de la paroi tubulaire (20) et de la longueur du canal de revêtement, les matériaux de revêtement peuvent durcir avant que la paroi tubulaire (20) soit sortie du dispositif de revêtement (1), ce qui permet d'obtenir une couche dont l'épaisseur est respectée de manière précise.
EP07702624A 2006-01-17 2007-01-09 Procede d'application uniforme d'un revetement sur une paroi tubulaire Withdrawn EP1973673A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006002369A DE102006002369B4 (de) 2006-01-17 2006-01-17 Verfahren und Beschichtungsvorrichtung zum gleichmäßigen Auftragen einer Beschichtung auf einer rohrförmigen Wandung sowie ein Verbundrohr
PCT/EP2007/000110 WO2007082653A1 (fr) 2006-01-17 2007-01-09 Procede d'application uniforme d'un revetement sur une paroi tubulaire

Publications (1)

Publication Number Publication Date
EP1973673A1 true EP1973673A1 (fr) 2008-10-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07702624A Withdrawn EP1973673A1 (fr) 2006-01-17 2007-01-09 Procede d'application uniforme d'un revetement sur une paroi tubulaire

Country Status (5)

Country Link
US (1) US20100227190A1 (fr)
EP (1) EP1973673A1 (fr)
CA (1) CA2637227A1 (fr)
DE (1) DE102006002369B4 (fr)
WO (1) WO2007082653A1 (fr)

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JP5743725B2 (ja) * 2011-06-06 2015-07-01 キヤノン株式会社 ローラの製造方法
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DE102006002369B4 (de) 2007-11-15
WO2007082653A1 (fr) 2007-07-26
CA2637227A1 (fr) 2007-07-26
DE102006002369A1 (de) 2007-07-26

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