DE4404492C2 - Process for the production of a multilayer composite pipe - Google Patents

Process for the production of a multilayer composite pipe

Info

Publication number
DE4404492C2
DE4404492C2 DE4404492A DE4404492A DE4404492C2 DE 4404492 C2 DE4404492 C2 DE 4404492C2 DE 4404492 A DE4404492 A DE 4404492A DE 4404492 A DE4404492 A DE 4404492A DE 4404492 C2 DE4404492 C2 DE 4404492C2
Authority
DE
Germany
Prior art keywords
metal foil
adhesion promoter
edges
protective layer
pipe
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.)
Expired - Fee Related
Application number
DE4404492A
Other languages
German (de)
Other versions
DE4404492A1 (en
Inventor
Manfred Hoffmann
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.)
BECKER PLASTICS GmbH
Original Assignee
BECKER PLASTICS GmbH
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 BECKER PLASTICS GmbH filed Critical BECKER PLASTICS GmbH
Priority to DE4404492A priority Critical patent/DE4404492C2/en
Publication of DE4404492A1 publication Critical patent/DE4404492A1/en
Application granted granted Critical
Publication of DE4404492C2 publication Critical patent/DE4404492C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/382—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges using laminated sheets
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • 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
    • B29C66/50—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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73755—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being fully cured, i.e. fully cross-linked, fully vulcanized
    • B29C66/73756—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being fully cured, i.e. fully cross-linked, fully vulcanized the to-be-joined areas of both parts to be joined being fully cured
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B29C66/73941—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset characterised by the materials of both parts being thermosets
    • 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
    • B29D23/001—Pipes; Pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/009—Using laser
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • 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
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • 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
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/003—Layered products comprising a metal layer
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/16—Tin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Mehrschichtverbundrohres gemäß dem Oberbegriff des Anspruches 1.The invention relates to a method for manufacturing a multi-layer composite pipe according to the preamble of Claim 1.

Mehrschichtverbundrohre gemäß dem erfindungsgemäßen Ver­ fahren stellen eine Composite aus Metall und Kunststoff dar und werden in erster Linie als Sanitärrohre, aber auch zur Heizkörperanbindung und auch als Fußboden­ heizungsrohre verwendet. Bei Temperaturbelastung vermin­ dert sich die Ausdehnung des Rohres im wesentlichen auf die Werte des Metalls bzw. des Aluminiums. Damit läßt sich gegenüber Kunststoffrohren die Längenänderung auf weniger als ein Viertel des Wertes reduzieren. Außerdem sind die Rohre stabiler. Deshalb können sie ohne Halb­ schalen als tragende und unterstützende Wandelemente aus­ kommen. Die Anzahl der Befestigungspunkte ist durchweg geringer. Ein Mehrschichtverbundrohr gemäß der Erfindung biegt sich selbst bei innen zirkulierender Warmwasser­ masse nicht durch. Hauptsächlich werden diese Rohre daher im Sanitärbereich, aber auch in der Heizungstechnik eingesetzt, weil sie keine Sauerstoffpermeabilität zeigen und deswegen gegen Korrosionen bei fachmännischer Verar­ beitung nicht anfällig sind.Multi-layer composite pipes according to the Ver drive make a composite of metal and plastic and are primarily used as sanitary pipes, however also for radiator connection and also as a floor heating pipes used. Reduce at temperature load the expansion of the tube essentially changes the values of the metal or aluminum. With that leaves the change in length compared to plastic pipes reduce less than a quarter of the value. Moreover the pipes are more stable. So they can do without a half form as load-bearing and supporting wall elements come. The number of attachment points is consistent lower. A multilayer composite pipe according to the invention bends itself with hot water circulating inside don't measure through. Mainly these tubes are therefore in the sanitary area, but also in heating technology used because they show no oxygen permeability and therefore against corrosion in professional processing processing are not susceptible.

Mehrschichtverbundrohre sind an sich bekannt. Insbeson­ dere sind mit Aluminium ummantelte Kunststoffrohre be­ kannt, welche innen ein Polypropylen-Randomcopolymerisat (PP-R) oder ein vernetztes PE-X (VPE)-Rohr auf der Basis der gängigen Norm und außen eine beidseitig beschichtete Aluminiumfolie aufweisen, die festhaftend überlappend aufkaschiert ist und zusätzlich noch außen eine Kunst­ stoffschicht zum Schutz der beispielsweise ca. 200 µm dicken Aluminiumfolie trägt. Gegenwärtig ist die Norm für das Innenrohr DIN 16892/16893. Diese Rohre haben für den Anwender bei einer im ungünstigen Falle auftretenden Langzeit-Korrosion des Aluminiums den Vorteil, daß das stabile Norm-Innenrohr erhalten bleibt und kein Wasser­ schaden auftreten kann (Sanitär- und Heizungstechnik, 1992, 11, SS. 777/781, 778 ff.).Multi-layer composite pipes are known per se. Insbeson others are plastic-coated plastic tubes knows which inside a polypropylene random copolymer (PP-R) or a cross-linked PE-X (VPE) pipe on the base the current standard and the outside is coated on both sides Have aluminum foil that overlaps firmly is laminated and additionally an art on the outside layer of material to protect, for example, approx. 200 µm thick aluminum foil. Currently, the norm is for the inner tube DIN 16892/16893. These tubes have for the User in the event of an unfavorable case  Long-term corrosion of aluminum has the advantage that stable standard inner tube is retained and no water damage can occur (plumbing and heating technology, 1992, 11, pp. 777/781, 778 ff.).

Verwendet man für die Herstellung der vorbekannten Rohre ein verhältnismäßig dickes Aluminiumblech, das unter praktischen Bedingungen eine Dicke von 0,5 mm aufweisen kann, so trägt man zunächst den Haftvermittler auf das Kunststoffrohr auf und schmiegt auf dessen Haftvermittlerschicht das Alublech, dessen Längskanten voreinander gestoßen und stumpf geschweißt werden. Dieses Herstellungsverfahren ist relativ kompliziert, weil die Schweißhitze nicht den darunterliegenden Kunststoff er­ reichen darf. Deshalb muß dafür gesorgt werden, daß die Ränder an der Schweißnaht während des Schweißens den Kunststoff nicht berühren. Um die notwendige Verbindung zwischen dem Aluminiumblech und dem Haftvermittler zu er­ reichen, muß deswegen in einem besonderen Verfahrensgang das Aluminiumrohr auf den Umfang des darunterliegenden Kunststoffrohres heruntergebogen werden. Bei diesen Ver­ bundrohren ist es ferner erforderlich, einen Haftvermitt­ ler auf das Aluminiumblech zu extrudieren, um den Kunst­ stoffaußenmantel zu befestigen. Schwierigkeiten entstehen bei solchen Rohren auch im Gefolge von Montagearbeiten an den Rohrverbindern, wo das Verbundrohr angeschnitten wer­ den muß und durch eindringendes Wasser, das zur Delami­ nierung führen kann.Is used for the production of the known pipes a relatively thick aluminum sheet that under practical conditions have a thickness of 0.5 mm can, you first wear the adhesion promoter on the Plastic pipe and nestles on it Adhesion layer the aluminum sheet, its longitudinal edges butted and butt welded. This Manufacturing process is relatively complicated because of that Heat does not weld the underlying plastic may be enough. It must therefore be ensured that the Edges on the weld seam during welding Do not touch plastic. To the necessary connection between the aluminum sheet and the adhesion promoter too must therefore suffice in a special procedure the aluminum tube to the perimeter of the one below Plastic tube are bent down. With these ver It is also necessary to use an adhesion promoter extrude on the aluminum sheet to the art to attach the outer jacket. Difficulties arise with such pipes also in the wake of assembly work the pipe connectors where the composite pipe is cut it must and through penetrating water, which leads to the delami nation can lead.

Ein anderes Herstellungsverfahren umgeht die mit der Schweißhitze verbundenen Nachteile durch Überlappung der Ränder der Metallfolie, die zuvor beidseitig mit einem Haftvermittler beschichtet worden ist. Es entsteht dann ein grundsätzlich fünfschichtiges Verbundrohr. Bei diesem Verfahren wird die Metallfolie um das Ausgangsrohr ge­ wickelt, wobei der Haftvermittler aktiviert wird. Bei derartigen Mehrschichtverbundrohren wird allerdings die Delaminierungsgefahr nicht ausgeschlossen und kann trotz der relativ großen Dicke des verwendeten Kunststoffnorm­ rohres dazu führen, daß bei hinreichender Aggressivität und hinreichendem Volumen entstehender Korrosionsprodukte das Innenrohr perforiert wird.Another manufacturing process bypasses the Disadvantages associated with overheating due to overheating The edges of the metal foil, previously covered on both sides with a Adhesion promoter has been coated. Then it arises basically a five-layer composite pipe. With this The metal foil is moved around the exit pipe wraps, whereby the adhesion promoter is activated. at  such multilayer pipes will, however Risk of delamination is not excluded and can despite the relatively large thickness of the plastic standard used pipe lead to that with sufficient aggressiveness and sufficient volume of corrosion products the inner tube is perforated.

Es ist auch bekannt, das aus einem verhältnismäßig dicken Aluminiumblech bestehende Metallrohr durch Überlappung des Bleches auf dem Innenrohr anzubringen und die über­ lappten Ränder mit Ultraschall zu schweißen. Die so her­ gestellten Rohre sind aber wegen der dicken Aluminium­ schicht relativ aufwendig.It is also known to be relatively thick Aluminum sheet existing metal pipe by overlap of the sheet on the inner tube and the over lapped edges to weld with ultrasound. The so forth Posed pipes are because of the thick aluminum layer is relatively complex.

Die Erfindung besteht deshalb ihrem Grundgedanken nach aus den kennzeichenden Merkmalen des Anspruches 1. Wei­ tere Merkmale der Erfindung sind Gegenstand der Unteran­ sprüche.The invention is therefore based on its basic idea from the characterizing features of claim 1. Wei Other features of the invention are the subject of the Unteran claims.

Dadurch, daß man in dem erfindungsgemäßen Verfahren die überlappten Ränder mindestens zum Teil haftvermittlerfrei hält, liegt an den Berührungsstellen blankes Metall. Da­ durch wird die Voraussetzung geschaffen, die Ränder mit einem Verfahren zu schweißen, das den Kunststoff nicht thermisch belastet. Dazu sieht die Erfindung das Ver­ schweißen mit einem Laser vor. Die Erfindung ermöglicht auf diese Weise eine vergleichsweise günstige, weil dünne Metallfolie, die vorzugsweise aber nicht ausschließlich aus Aluminium bestehen kann. Da das Überlappen einer sol­ chen Folie innerhalb des Herstellungsverfahrens ver­ gleichsweise einfach zu bewerkstelligen ist, erübrigen sich besondere Verfahrensschritte, die in anderen Verfah­ ren erforderlich sind, um die Metallfolie an den Haftver­ mittler anzuschmiegen. Da man erfindungsgemäß von einem Normrohr ausgeht, das gemäß der gängigen Norm, gegenwär­ tig also nach DIN 16892/16893 dimensioniert und geprüft ist, besteht eine verhältnismäßig große Sicherheit auch dagegen, daß allenfalls auftretende Korrosionsprodukte das Kunststoffrohr perforieren können.The fact that in the inventive method overlapped edges at least in part without a bonding agent holds, there is bare metal at the points of contact. because through creates the prerequisite with the edges a process that doesn't weld the plastic thermally stressed. To this end, the invention sees the ver pre-weld with a laser. The invention enables in this way a comparatively cheap because thin Metal foil, which is preferably but not exclusively can consist of aluminum. Since the overlap of a sol Chen film within the manufacturing process is equally easy to do, superfluous special procedural steps, which are in other procedures ren are required to attach the metal foil to the adhesive nestled in the middle. Since one of the invention Standard tube goes out, which according to the current standard, currently So dimensioned and tested according to DIN 16892/16893  there is also a relatively high level of security against that any occurring corrosion products can perforate the plastic tube.

Mit der Erfindung lassen sich Mehrschichtverbundrohre produzieren, die eine Reihe besonderer Gebrauchsvorteile zeigen. Diese lassen sich beispielsweise wie folgt errei­ chen:
With the invention, multilayer composite pipes can be produced, which show a number of special advantages in use. These can be achieved, for example, as follows:

  • - Maximale Betriebstemperatur 95°C- Maximum operating temperature 95 ° C
  • - maximaler Betriebsdruck 10 bar- maximum operating pressure 10 bar
  • - mittlerer linearer Längenausdehnungskoeffizient ca. 0,3 × 10-4 K-1 - Average linear expansion coefficient approx. 0.3 × 10 -4 K -1
  • - minimaler Biegeradius (ohne Biegefeder) 5 D.- minimum bending radius (without spiral spring) 5 D.

Das Innenrohr auf der Basis der gängigen Norm kann die folgenden kennzeichnenden Eigenschaften haben:
The inner tube based on the current standard can have the following characteristic properties:

Das erfindungsgemäße Verfahren bietet ferner die Voraus­ setzung für eine weitere Vereinfachung in der Herstellung des neuen Mehrschichtverbundrohres. Das geschieht bevor­ zugt nach den Merkmalen des Anspruches 2, weil man bei diesem Verfahren den Haftvermittler zwischen der Kunststoffummantelung und der Metallfolie weglassen kann. Das ist eine Folge der laserverschweißten Metallfolie, die diese Erleichterung zuläßt.The method according to the invention also offers the advance setting for further simplification in production of the new multi-layer composite pipe. That happens before moves according to the features of claim 2, because one this process the adhesion promoter between the plastic sheathing  and can omit the metal foil. The is a consequence of the laser welded metal foil, which allows this relief.

In der zweckmäßigen Ausführungsform des erfindungsgemäßen Verfahrens, die die Merkmale des Anspruches 3 verwirk­ licht, wird ein Copolymer mit haftungsaktiven Gruppen verwendet, das als Beschichtung auf der Metallfolie ange­ bracht ist.In the expedient embodiment of the invention Method that realizes the features of claim 3 light, becomes a copolymer with adhesive groups used that as a coating on the metal foil is brought.

Im übrigen kann das vorstehend grundsätzlich beschriebene erfindungsgemäße Verfahren auf zweierlei Wegen verwirk­ licht werden. Eine dieser Möglichkeiten ist im Anspruch 4 gekennzeichnet. In diesem Fall wird der notwendige Haft­ vermittler auf das Kunststoffnormrohr aufgebracht, z. B. aufextrudiert, worauf dann die blanke Metallfolie unter Überlappung ihrer Ränder aufgepreßt und derart heißver­ siegelt wird, bevor man die überlappten Ränder laserver­ schweißt. Für ein derartiges Verfahren eignet sich bevor­ zugt eine Aluminiumfolie, was im Anspruch 5 gekennzeich­ net ist.Otherwise, the principle described above can Method according to the invention implemented in two ways become light. One of these possibilities is in claim 4 characterized. In this case, the necessary detention intermediary applied to the plastic standard pipe, for. B. extruded, whereupon the bare metal foil underneath Pressed overlap of their edges and so hot is sealed before laservering the overlapped edges welded. Before such a method is suitable pulls an aluminum foil, which is characterized in claim 5 is not.

Andererseits kann das neue Verfahren auch von einer beid­ seitig beschichteten Aluminiumfolie ausgehen, die aller­ dings im Gegensatz zum bekannten auf ihrer Außenseite nicht ebenfalls mit einem Haftvermittler beschichtet ist, aber eine gängige Stärke von ca. 200 µm aufweist. Dieses Verfahren ist Gegenstand des Anspruches 6.On the other hand, the new method can also be used by both sided coated aluminum foil, everyone things in contrast to the familiar on the outside is also not coated with an adhesion promoter, but has a common thickness of approx. 200 µm. This Process is the subject of claim 6.

Da man bei diesem Verfahren zur Vorbereitung der Laser­ verschweißung wie eingangs beschrieben die überlappten Ränder haftvermittlerfrei halten muß, empfiehlt es sich, die Ausführungsform nach Anspruch 6 zu verwenden, nach der man an der überlappten Kante die vollflächig be­ schichtete Metallfolie vor ihrer Laserverschweißung von der Haftvermittlerschicht mechanisch befreit. Günstiger kann es jedoch sein, das Entfernen des Haftvermittlers in den Schweißprozeß einzubringen, was Gegenstand des Anspruches 7 ist. Danach wird ein gesplitteter Laser verwendet, der an der Schweißung den Haftvermittler entfernt.Since you use this procedure to prepare the laser welding as described above the overlapped Edges must be kept free of adhesion promoters, it is recommended to use the embodiment according to claim 6, after the one on the overlapped edge be the full surface layered metal foil before laser welding of the adhesive layer mechanically freed. better  However, it may be necessary to include the removal of the adhesion promoter in the welding process, what is the subject of claim 7. Then a split laser is used, the on the bonding agent is removed from the weld.

Eine bevorzugte Ausführungsform einer Vorrichtung zur Herstellung eines Mehrschichtver­ bundrohres ist durch die Merkmale des kennzeichnenden Teils des Anspruchs 10 gekenn­ zeichnet.A preferred embodiment of a device for producing a multilayer ver Bundrohres is characterized by the features of the characterizing part of claim 10 records.

Die besonderen Eigenschaften des erfindungsgemäßen Mehrschichtverbundrohres lassen sich wie folgt zusammenfassen:
The special properties of the multilayer composite pipe according to the invention can be summarized as follows:

  • - Gute Zeitstandfestigkeit,- good creep strength,
  • - hervorragende Wärmealterungsstabilisierung, d. h. keine Schäden durch thermooxi­ dative Alterung,- excellent heat aging stabilization, d. H. no damage from thermooxi dative aging,
  • - Beständigkeit gegen Spannungsrißbildung,- resistance to stress cracking,
  • - chemische Beständigkeit gegen dem Heizungswasser zugesetzte Additive und Inhi­ bitoren,- chemical resistance to additives and inhi added to the heating water bitoren,
  • - Flexibilität,- Flexibility,
  • - Kaltverlegbarkeit,- Kaltverlegbarkeit,
  • - Korrosionsbeständigkeit- corrosion resistance
  • - Verlegbarkeit von der Rolle oder in Stangen,- rollability or in bars,
  • - hohe Weiterreißfestigkeit und Abriebfestigkeit- high tear resistance and abrasion resistance
  • - glatte Innenflächen, d. h. geringer Druckverlust und keine Inkrustrationen.- smooth inner surfaces, d. H. low pressure drop and no increments.

Als Vorteile gegenüber Metallrohren mit geringeren Wanddicken ergeben sich:
The advantages over metal pipes with smaller wall thicknesses are:

  • - Geringerer linearer Ausdehnungskoeffizient, im Vergleich mit einem Kunststoffrohr,- Lower linear expansion coefficient compared to a plastic pipe,
  • - Biegeformstabilität, d. h. das flexible, biegbare Rohr behält nach dem Biegen seine Form,- shape stability, d. H. the flexible, bendable tube retains its shape after bending Shape,
  • - Formbeständigkeit im Betriebszustand, - dimensional stability in operating condition,  
  • - bei Verwendung als Heizungsrohr Sauerstoffdichtigkeit gemäß DIN 4726.- Oxygen tightness when used as a heating pipe according to DIN 4726.

Im folgenden wird ein nach dem erfindungsgemäßen Verfah­ ren hergestelltes Kunststoffrohr anhand der Zeichnung beispielsweise erläutert. Die Zeichnung zeigt in abgebro­ chener Darstellung und teilweise Vergrößerung das Mehr­ schichtverbundrohr gemäß der Erfindung im Längsschnitt.The following is a procedure according to the invention Ren manufactured plastic pipe based on the drawing for example explained. The drawing shows in abbr representation and partial enlargement Laminated pipe according to the invention in longitudinal section.

Wie sich aus der Zeichnung ergibt, ist ein Innenrohr 1 mit den beispielsweisen Abmessungen 16 × 2,0 mm aus hoch­ wärmealterungsbeständigem, hochmolekularem, elektronen­ strahlvernetztem Polyethylen hoher Dichte vorgesehen. Die zylindrische Außenfläche trägt eine copolymere Adhäsions­ schicht 2, welche aus einem Haftvermittler, d. h. einer Innenbeschichtung des mit 3 bezeichneten überlappt gesie­ gelten Aluminiumrohres besteht. Das Aluminiumrohr 3 hat eine beispielsweise Wanddicke von 200 µm.As can be seen from the drawing, an inner tube 1 with the dimensions 16 × 2.0 mm, for example, made of highly heat-aging-resistant, high-molecular, electron-beam crosslinked high-density polyethylene is provided. The cylindrical outer surface carries a copolymeric adhesion layer 2, that is, of an adhesion promoter consists of an inner coating of the valid overlap with gesie 3 designated aluminum tube. The aluminum tube 3 has a wall thickness of 200 μm, for example.

Verwendet wird in diesem Verfahren eine beidseitig be­ schichtete Aluminiumfolie. Die eine Seite trägt einen Haftvermittler aus einem Copolymer mit aktiven Gruppen und ist dem Normrohr zugewandt, was in der Lage der Schicht 2 zum Ausdruck kommt. Die andere Seite trägt le­ diglich einen Haftlack und benötigt keinen weiteren Haftvermittler. Dieser Lack ist bei 4 verdeutlicht, die Aluminiumfolie wird auf die Copolymerschicht gesiegelt. Den äußeren Abschluß bildet eine weiße Schutzschicht 5 aus hochwärme- und alterungsbeständigem Polyethylen mitt­ lerer Dichte.An aluminum foil coated on both sides is used in this process. One side carries an adhesion promoter made of a copolymer with active groups and faces the standard pipe, which is reflected in the position of layer 2 . The other side only has an adhesive varnish and does not require any other adhesion promoter. This varnish is shown at 4 , the aluminum foil is sealed onto the copolymer layer. The outer end forms a white protective layer 5 made of highly heat and aging resistant medium density polyethylene.

Man kann für das Aluminiumrohr natürlich einen beidseitig partiell beschichteten Folienstreifen geeignet Breite verwenden, dessen nicht beschichtete Längskanten über­ lappt sind und mit einer Längsnaht zusammengehalten werden. Die Längsnaht wird durch einen Laserstrahl herbeige­ führt, der die Metallschichten miteinander verschweißt.You can of course use one on both sides for the aluminum tube partially coated film strips suitable width use whose uncoated longitudinal edges over are lapped and held together with a longitudinal seam.  The longitudinal seam is made by a laser beam leads, which welds the metal layers together.

Bei einem anderen Verfahren wird der Haftvermittler durch Coextrusion auf das Innenrohr aufgebracht. In diesem Fall verwendet man eine blanke Aluminiumfolie, die erst vor dem Aufbringen der Kunststoffschutzschicht mit einem Haftver­ mittler 4 beschichtet wird. Zunächst wird die blanke Alu­ miniumfolie auf das mit dem Haftvermittler ummantelte Normrohr umgelegt, durch Anpressen versiegelt und dann laserverschweißt. Danach wird die äußere Beschichtung mit dem Haftvermittler und der Kunststoffaußenschicht vorge­ nommen.In another method, the coupling agent is applied to the inner tube by coextrusion. In this case, a bare aluminum foil is used, which is coated with an adhesive 4 only before the protective plastic layer is applied. First, the bare aluminum foil is folded over the standard pipe covered with the bonding agent, sealed by pressing and then laser welded. Then the outer coating with the adhesion promoter and the plastic outer layer is made.

Claims (10)

1. Verfahren zur Herstellung eines Mehrschichtverbundrohres aus einem vernetzten Propylen-Randomcopolymerisat (PP-R) oder einem vernetzten PE-X (VPE)-Rohr auf der Basis der gängigen Norm und einer Metallfolie, die mit Hilfe eines zwischen dem Basisrohr und der Metallfolie angeordneten Haftvermittlers festhaftend unter Überlappung ihrer Ränder aufgebracht und zusätzlich außen mit einer Kunststoff­ schutzschicht versehen wird, dadurch gekennzeichnet, dass die überlappenden Ränder an ihren Berührungsstellen zumindest zum Teil haftvermittlerfrei gehalten und die haftvermittlerfreien Bereiche der Ränder laserverschweißt werden.1. Process for producing a multilayer composite pipe from a cross-linked propylene random copolymer (PP-R) or a cross-linked PE-X (VPE) tube based on the current standard and a metal foil, which is arranged with the aid of a between the base tube and the metal foil Adhesion promoter adhered with overlap of its edges and additionally provided with a plastic protective layer on the outside, characterized in that the overlapping edges at their contact points are kept at least partially free of adhesion promoter and the areas of the edges which are free of adhesion promoter are laser-welded. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass für die äußere Kunst­ stoffschutzschicht ein hochalterungsbeständiges Polyethylen mittlerer Dichte ver­ wendet wird und auf die Metallfolie aufgebracht wird.2. The method according to claim 1, characterized in that for external art protective layer is a highly aging resistant medium density polyethylene is applied and applied to the metal foil. 3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Haftvermittler als Beschichtung auf der Metallfolie angebracht ist und hierfür ein Copolymer verwendet wird.3. The method according to any one of claims 1 or 2, characterized in that the Adhesion promoter is applied as a coating on the metal foil and a Copolymer is used. 4. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Haftvermittler auf das Normrohr aufgebracht und dann die blanke Metallfolie um­ gelegt, durch Anpressen heißversiegelt, laserverschweißt und anschließend mit ei­ nem Haftvermittler und der Kunststoffschutzschicht versehen wird.4. The method according to any one of claims 1 or 2, characterized in that the Adhesion promoter applied to the standard pipe and then around the bare metal foil laid, heat sealed by pressing, laser welded and then with egg nem adhesion promoter and the plastic protective layer is provided. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass als Metallfolie eine Aluminiumfolie verwendet wird.5. The method according to any one of claims 1 to 4, characterized in that as Metal foil an aluminum foil is used. 6. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die verwendete Aluminiumfolie beidseitig beschichtet ist, wobei die der mit dem Haftvermittler beschichteten Seite gegenüberliegende Folienseite mit einem Haftlack be­ schichtet ist und die Folie einschließlich ihrer beiden Beschichtungen eine Stärke von ca. 200 µm aufweist.6. The method according to any one of claims 1 to 4, characterized in that the used aluminum foil is coated on both sides, the one with the adhesion promoter  coated side opposite side of the film with an adhesive varnish is layered and the film including its two coatings is a strength 200 µm. 7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Beschichtung der überlappten Kanten der vollflächig beschichteten Metallfolie vor ihrer Laserverschweißung mechanisch entfernt wird.7. The method according to any one of claims 1 to 6, characterized in that the Coating the overlapped edges of the fully coated metal foil their laser welding is mechanically removed. 8. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Beschichtung der überlappten Kanten der vollflächig beschichteten Metallfolie mit­ tels gesplittetem Laser entfernt wird.8. The method according to any one of claims 1 to 6, characterized in that the Coating the overlapped edges of the metal film coated over the entire surface split laser is removed. 9. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der Haftvermittler durch Coextrusion auf das Basisrohr aufgebracht und die überlappend gefaltete, blanke Aluminiumfolie um die coextrudierte Haftvermittlerschicht des Basisrohres gelegt und vor dem Laserverschweißen an diese angepresst wird, worauf im Coextrusionsverfahren die äußere Schutzschicht aufgebracht wird.9. The method according to claim 4, characterized in that the adhesion promoter applied to the base tube by coextrusion and the overlapping folded bare aluminum foil around the co-extruded adhesive layer of the base tube is placed and pressed against it before laser welding Coextrusion process the outer protective layer is applied. 10. Vorrichtung zur Herstellung eines Mehrschichtverbundrohres aus einem vernetzten Propylen-Randomcopolymerisat (PP-R) oder einem vernetzten PE-X (VPE)-Rohr auf der Basis der gängigen Norm und einer Metallfolie, die mit Hilfe eines zwischen dem Basisrohr und der Metallfolie angeordneten Haftvermittlers festhaftend unter Überlappung ihrer Ränder aufgebracht und zusätzlich außen mit einer Kunststoff­ schutzschicht versehen wird, nach einem der Ansprüche 1 bis 9, dadurch gekenn­ zeichnet, dass in Produktionsrichtung einer Coextrusionsvorrichtung eine Folien­ falteinrichtung, die die Metallfolie um die coextrudierte Schicht legt und die Über­ lappung der Folienkanten herstellt, sowie Preßbacken- und/oder Klemmbackenwerk­ zeuge vorgesehen sind, die die zum Rohr umgeformte Metallfolie anpressen und der Laserschweißvorrichtung vorgeschaltet sind.10. Device for producing a multilayer composite pipe from a cross-linked Propylene random copolymer (PP-R) or a cross-linked PE-X (VPE) pipe on the basis of the current standard and a metal foil, which with the help of a between the base tube and the metal foil arranged adhesive under firmly Overlapping of their edges applied and additionally with a plastic on the outside protective layer is provided, according to one of claims 1 to 9, characterized records that a film in the direction of production of a coextrusion device folding device that wraps the metal foil around the coextruded layer and the over lapping the film edges produces, as well as press jaws and / or jaws Witnesses are provided which press the metal foil formed into the tube and Laser welding device are connected upstream.
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DE102005053347A1 (en) * 2005-11-07 2007-05-16 Wrw Westfaelische Rohrwerke Gm Multi-layer composite tubing, comprises an inner plastic tube, a steel interlayer with laser-welded, overlapping long edges, and an outer plastic tube
DE102005053347B4 (en) * 2005-11-07 2007-08-16 WRW Westfälische Rohrwerke GmbH Method and plant for producing a multilayer composite pipe
DE102009012072A1 (en) 2009-03-06 2010-09-09 WRW Westfälische Rohrwerke GmbH System for manufacturing multi-layer composite pipe, has prefixing device provided for prefixing overlapping longitudinal edges of tubular body and placed before welding devices, and device provided for formation of plastic inner layer
DE102009012072B4 (en) * 2009-03-06 2017-08-24 WRW Westfälische Rohrwerke GmbH Plant and method for producing a multilayer composite pipe
DE102009013248A1 (en) 2009-03-14 2010-09-23 Becker Plastics Gmbh Method for the production of a connection tube for indoor installation, comprises forming an interiorly lying polymer tube having a layer of binding agent at its external surface and bending a tubular metal foil

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