DE9111628U1 - Plastic pipe - Google Patents

Plastic pipe

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Publication number
DE9111628U1
DE9111628U1 DE9111628U DE9111628U DE9111628U1 DE 9111628 U1 DE9111628 U1 DE 9111628U1 DE 9111628 U DE9111628 U DE 9111628U DE 9111628 U DE9111628 U DE 9111628U DE 9111628 U1 DE9111628 U1 DE 9111628U1
Authority
DE
Germany
Prior art keywords
pipe
socket
section
spigot
spigot end
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 - Lifetime
Application number
DE9111628U
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German (de)
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE9111628U priority Critical patent/DE9111628U1/en
Priority claimed from DE4128057A external-priority patent/DE4128057A1/en
Publication of DE9111628U1 publication Critical patent/DE9111628U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14598—Coating tubular 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—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
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1286—Stepped joint cross-sections comprising at least one bevelled joint-segment
    • 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
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • F16L9/12—Rigid pipes of 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
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • 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
    • 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
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • 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
    • B29L2023/18—Pleated or corrugated hoses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)

Description

Leitungsrohr aus KunststoffPlastic pipe

Gegenstand der Erfindung ist ein Leitungsrohr aus Kunststoff nach dem Oberbegriff des Anspruches 1.The subject matter of the invention is a plastic pipe according to the preamble of claim 1.

Die EP-A-O 385 465 offenbart schon ein Rohr vorstehender Art, bei dem die Muffen durch Aufweiten des einen Endes der Rohrstücke hergestellt werden. Hierzu kann der endlose Rohrstrang mit gewellten Abschnitten und glattzylindrischen Abschnitten größerer Wanddicke hergestellt und im Bereich der glattzylindrischen Abschnitte in Rohrstücke geteilt werden. Dafür sind umlaufende Formbackenpaare mit gewelltem und mindestens ein Formbackenpaar mit glattem Formprofil vorgesehen und wird die Extrudiergeschwindig-EP-A-0 385 465 already discloses a pipe of the above type, in which the sockets are produced by expanding one end of the pipe sections. For this purpose, the endless pipe string can be produced with corrugated sections and smooth cylindrical sections with a greater wall thickness and divided into pipe sections in the area of the smooth cylindrical sections. For this purpose, circumferential pairs of molding jaws with a corrugated profile and at least one pair of molding jaws with a smooth profile are provided and the extrusion speed is

Patentanwälte ■ European Patent Attorneys ■ Zugelassene Vertreter beim Europäischen PatentamtPatent Attorneys ■ European Patent Attorneys ■ Authorized Representatives before the European Patent Office

Rechtsanwalt: zugelassen bei den Hamburger GerichtenLawyer: admitted to the Hamburg courts

Deutsche Bank AG Hamburg, Nr. Ö.5/2&497 (BLZ 200 700,00) ■ Postgiro Hamburg 28 42-206
Dresdner Bark AG Hamburg, Nr. 933 60 3.5 |BLZ 200 800 00)Deutsche Bank AG Hamburg, No. Ö.5/2&497 (bank code 200 700.00) ■ Postgiro Hamburg 28 42-206
Dresdner Bark AG Hamburg, No. 933 60 3.5 | Bank code 200 800 00)

keit zwecks Herstellung des glattzylindrischen Rohrabschnittes größerer Wanddicke erniedrigt. Dies ist notwendig, um die Wanddicke des glatten Rohrabschnittes so einzustellen, daß Innen- und Außendurchmesser in diesem Abschnitt den Standardabmessungen entsprechen. Die Änderung der Extrudier- oder Abzugsgeschwindigkeit ist jedoch verfahrenstechnisch problematisch, insbesondere wenn kleinere Nennweiten mit hoher Abzugsgeschwindigkeit hergestellt werden sollen. Eine betriebssichere und maß- bzw. normgerechte Herstellung des Leitungsrohres kann Schwierigkeiten bereiten.speed is reduced in order to produce the smooth cylindrical pipe section with a greater wall thickness. This is necessary in order to adjust the wall thickness of the smooth pipe section so that the inside and outside diameters in this section correspond to the standard dimensions. However, changing the extrusion or withdrawal speed is problematic in terms of process technology, especially if smaller nominal diameters are to be produced with a high withdrawal speed. Producing the line pipe in a way that is reliable and dimensional or standard-compliant can cause difficulties.

Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, ein in der Herstellung weniger problematisches Leitungsrohr der eingangs der genannten Art zu schaffen, das eine betriebssichere und maß- bzw. normgerechtere Rohrproduktion ermöglicht, insbesondere bei kleineren Nennweiten und hoher Abzugsgeschwindigkeit.Based on this, the invention is based on the object of creating a line pipe of the type mentioned at the beginning that is less problematic to manufacture and that enables pipe production that is reliable and more dimensional or standard-compliant, in particular with smaller nominal diameters and high withdrawal speeds.

Die Lösung dieser Aufgabe ist im Anspruch 1 angegeben. Vorteilhafte Ausgestaltungen sind den Unteransprüchen 2 bis 9 zu entnehmen.The solution to this problem is specified in claim 1. Advantageous embodiments can be found in subclaims 2 to 9.

Bei einem erfindungsgemäßen Leitungsrohr werden die Muffen und gegebenenfalls die Spitzenden auf einer Anlage herge-In a pipe according to the invention, the sockets and, if necessary, the spigot ends are manufactured on one system.

stellt, die von derjenigen für die Herstellung der Rohrstücke verschieden ist. Mit dem Spritzgießen der Muffen bzw. Spitzenden können diese zugleich an die Rohrstücke angespritzt werden, wodurch zusätzliche Einrichtungen für die Verbindung von Muffen bzw. Spitzenden mit den Rohrstücken entfallen. Dieses Spritzgießen kann inline mittels Automaten erfolgen, die vom Extruder kommende Rohrstücke komplettieren. Diese Technik ist insbesondere bis etwa DN 160 vorteilhaft, weil die durch die Schließkraft bedingte Baugröße durch Inline-Anordnung der Automaten begrenzt ist.which is different from that for the production of the pipe sections. By injection molding the sockets or spigots, these can be molded onto the pipe sections at the same time, which eliminates the need for additional equipment for connecting sockets or spigots to the pipe sections. This injection molding can be carried out inline using machines that complete pipe sections coming from the extruder. This technology is particularly advantageous up to around DN 160, because the size determined by the closing force is limited by the inline arrangement of the machines.

Die Muffen und/oder Spitzenden können auch zunächst mittels Spritzgußautomaten hergestellt und mittels inline angebrachter Schweißvorrichtungen an die kontinuierlich extrudierten und aufgeteilten Rohrstücke geschweißt werden. In der Regel wird man die Muffen und/oder Spitzenden zwischen dem Spritzgießen und dem Anschweißen magazinieren« Das Anschweißen kann im Spiegelstumpf- oder im Ultraschall-Schweißverfahren vorgenommen werden. Ein bevorzugter Anwendungsbereich für das Schweißen ist bei etwa DN 160 bis 200 und darüber hinaus gegeben.The sockets and/or spigots can also be manufactured using injection molding machines and then welded to the continuously extruded and divided pipe sections using inline welding devices. As a rule, the sockets and/or spigots are stored between injection molding and welding. The welding can be carried out using the mirror butt or ultrasonic welding process. A preferred application area for welding is around DN 160 to 200 and beyond.

Ferner können Muffen und/oder Spitzenden durch Ankleben mit den Rohrstücken verbunden sein. Diese Verbindungs-Furthermore, sockets and/or spigots can be connected to the pipe sections by gluing. These connections

technik empfiehlt sich ebenso wie die Schweißtechnik für größere Rohre z.B. im Bereich von DN 300 bis 400. Muffen und Spitzenden werden dafür gegebenenfalls halbautomatisch im Extrusionsverfahren hergestellt.technology is recommended, as is welding technology, for larger pipes, e.g. in the range of DN 300 to 400. Sockets and spigots are manufactured semi-automatically using the extrusion process if necessary.

Vorstehende Verbindungstechniken sind natürlich nicht auf die angegebenen Rohrdimensionen beschränkt und können auch in Kombination eingesetzt werden, indem z.B. die Muffe angespritzt und das Spitzende angeschweißt wird.The above connection techniques are of course not limited to the specified pipe dimensions and can also be used in combination, e.g. by injection-molding the socket and welding the spigot.

Ein Zerlegen des Rohrstranges zwischen aneinandergrenzenden Wellenbergen des Außenrohres begünstigt eine breite Stoßfläche an der Fügestelle zu Muffe und/oder Spitzende.Cutting the pipe string between adjacent corrugation crests of the outer pipe promotes a wide joint surface at the joint to the socket and/or spigot end.

Bevorzugt wird man das Leitungsrohr einschließlich Muffe und/oder Spitzende aus PVC oder PET fertigen, womit die erforderlichen Festigkeitswerte erreicht werden.Preferably, the pipe including the socket and/or spigot end will be made of PVC or PET, which will achieve the required strength values.

Erfindungsgemäß sind Leitungsrohre herstellbar, die in Form und Abmessungen denjenigen gemäß EP-A-O 385 465 entsprechen. Insoweit wird auf diese Veröffentlichung Bezug genommen. Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung der zugehörigen Zeichnungen, die insbesondere Einzelheiten der Verbindung zwischen Muffe bzw. Spitzende und Rohrstück zeigen.According to the invention, line pipes can be produced which correspond in shape and dimensions to those according to EP-A-0 385 465. In this respect, reference is made to this publication. Further details and advantages of the invention are evident from the following description of the associated drawings, which in particular show details of the connection between the socket or spigot end and the pipe section.

In den Zeichnungen zeigen:The drawings show:

Fig. 1 ein erfindungsgemäßes Leitungsrohr in einem Längs-Halbschnitt durch das Muffenende;Fig. 1 shows a line pipe according to the invention in a longitudinal half-section through the socket end;

Fig. 2 dasselbe Rohr in einem Längs-Halbschnitt durch das Spitzende;Fig. 2 the same pipe in a longitudinal half-section through the spigot end;

Fig. 3 ein anderes Rohr in einem Schnitt durch das Ende mit angespritzter Muffe;Fig. 3 another pipe in a section through the end with molded-on sleeve;

Fig. 4 dasselbe Rohr in einem Schnitt durch das Ende mit angespritztem Spitzende;Fig. 4 the same pipe in a section through the end with molded spigot;

Fig. 5 ein weiteres Rohr in einem Schnitt durch das Ende mit stumpf angeschweißter Muffe;Fig. 5 another pipe in a section through the end with butt-welded socket;

Fig. 6 dasselbe Rohr in einem Schnitt durch das Ende mit. stumpf angeschweißtem Spitzende;Fig. 6 the same pipe in a section through the end with butt welded spigot;

Fig. 7 ein weiteres Rohr in einem Schnitt durch das Ende mit Ultraschall-angeschweißter Muffe;Fig. 7 another pipe in a section through the end with ultrasonically welded socket;

Fig. 8 ein weiteres Rohr in einem Schnitt durch das Ende mit angeschweißter oder geklebter Muffe;Fig. 8 another pipe in a section through the end with welded or glued socket;

Fig. 9 dasselbe Rohr in einem Schnitt durch das Ende mit angeschweißtem oder geklebtem Spitzende.Fig. 9 the same pipe in a cross-section through the end with welded or glued spigot.

Gemäß Fig. 1 und 2 hat ein erfindungsgemäßes Leitungsrohr 1 ein Rohrstück 2 mit einenends verbundener Muffe 3 und anderenends verbundenem Spitzende 4. Das Rohrstück 2 besteht aus glattem Innenrohr 21 und gewelltem Außenrohr 2'' und ist in einem Koextrusionsverfahren hergestellt. Es ist durch Ablängen des vom Extruder kommenden endlosen Rohrstranges zwischen benachbarten Wellenbergen des Außenrohres 2'1 entstanden.According to Fig. 1 and 2, a line pipe 1 according to the invention has a pipe section 2 with a socket 3 connected at one end and a spigot end 4 connected at the other end. The pipe section 2 consists of a smooth inner pipe 2 1 and a corrugated outer pipe 2'' and is manufactured in a coextrusion process. It is produced by cutting the endless pipe strand coming from the extruder between adjacent corrugation peaks of the outer pipe 2' 1 .

Die Muffe 3 und das Spitzende 4 sind durch Spritzgießen hergestellt. Die Muffe 3 ist zu ihrem freien Ende hin etwas erweitert, damit dort das Spitzende eines gleichen oder ein entsprechendes Ende eines herkömmlichen und insbesondere standardisierten Leitungsrohres eingeschoben werden kann. Dort ist auch eine Nut 31 für die Aufnahme eines Dichtungsringes vorgesehen. Das Spitzende 4 hat hingegen an seinem freien Ende einen Konus 41, der das Einsetzen in eine Muffe 3 erleichtert.The socket 3 and the spigot end 4 are manufactured by injection molding. The socket 3 is slightly widened towards its free end so that the spigot end of an identical or a corresponding end of a conventional and in particular standardized pipe can be inserted there. A groove 3 1 is also provided there for receiving a sealing ring. The spigot end 4, on the other hand, has a cone 4 1 at its free end, which makes it easier to insert into a socket 3.

Muffe 3 und Spitzende 4 sind im gezeigten Ausführungsbeispiel über ebene Flächen mit dem Rohrstück 2 verbunden. Dort sind Verbindungsnähte 5 ausgebildet, auf deren Her-In the embodiment shown, socket 3 and spigot 4 are connected to the pipe section 2 via flat surfaces. Connecting seams 5 are formed there, on the basis of which

Stellung mit Bezug auf die weiteren Figuren nachfolgend eingegangen wird. Dabei sind für Teile übereinstimmender Bezeichnung die vorstehend angegebenen Bezugsziffern verwendet. Position will be discussed below with reference to the other figures. The reference numbers given above are used for parts with the same designation.

Gemäß Fig. 3 und 4 sind Muffe 3 und Spitzende 5 an das Rohrstück 2 gespritzt. Dafür haben Muffe 3 und Spitzende 5 am angespritzten Ende jeweils eine Innenstufe 6, welche einen vorstehenden zylindrischen Abschnitt des Rohrstückes außen überdeckt und Scherkräfte abfängt. Beim Anspritzen wird das Rohrstück 2 im Bereich der Fügestelle erwärmt, was eine innige Verbindung mit Muffe 3 bzw. Spitzende 5 bedingt.According to Fig. 3 and 4, the socket 3 and the spigot 5 are injection molded onto the pipe section 2. For this purpose, the socket 3 and the spigot 5 each have an inner step 6 at the injection molded end, which covers a protruding cylindrical section of the pipe section on the outside and absorbs shear forces. During injection molding, the pipe section 2 is heated in the area of the joint, which creates an intimate connection with the socket 3 or spigot 5.

Gemäß Fig. 5 und 6 sind Muffe 3 bzw. Spitzende 5 stumpf mit dem Rohrstück 2 zusammengeschweißt. Die aneinanderliegenden Fügeflächen haben die Form eines Konus 7 und sind somit relativ groß und ebenfalls zum Abfangen von Scherkräften geeignet.According to Fig. 5 and 6, the socket 3 and the spigot 5 are butt-welded to the pipe section 2. The adjacent joining surfaces have the shape of a cone 7 and are thus relatively large and also suitable for absorbing shear forces.

Nach Fig. 7 hat die Muffe 3 wiederum eine Innenstufe 6 an der Verbindungsstelle, die einen zylindrischen Rand des Rohrstückes 2 außen übergreift. Diese Verbindung ist besonders für das Ultraschallschweißen gedacht und kann entsprechend für ein Spitzende vorgesehen sein.According to Fig. 7, the socket 3 again has an inner step 6 at the connection point, which overlaps a cylindrical edge of the pipe section 2 on the outside. This connection is particularly intended for ultrasonic welding and can accordingly be provided for a spigot end.

Die Fig. 8 und 9 zeigen ebenfalls eine Muffe 3 bzw. ein Spitzende 5 mit einer Innenstufe 6, welche einen zylindrischen Kragen des Rohrstückes 2 übergreifen. Diese Ausgestaltung ist für andere Schweiß- oder auch Klebeverbindungen gedacht.Fig. 8 and 9 also show a socket 3 or a spigot 5 with an inner step 6, which overlap a cylindrical collar of the pipe section 2. This design is intended for other welded or adhesive connections.

Claims (9)

AnsprücheExpectations 1. Leitungsrohr aus Kunststoff, insbesondere für Abwasser, mit einem glatten Innenrohr und einem damit verbundenen und gewellten Außenrohr sowie einer aufgeweiteten Muffe an einem Ende eines Rohrstückes für eine Muffenverbindung mit dem anderen Ende eines gleichen oder herkömmlichen, insbesondere standardisierten Rohres, bei dem Innenrohr und Außenrohr koextrudiert sind, dadurch gekennzeichnet, daß die Muffe spritzgegossen und an das eine Ende des Rohrstückes angesetzt ist.1. Plastic pipe, in particular for waste water, with a smooth inner pipe and a corrugated outer pipe connected to it, as well as a widened sleeve at one end of a pipe section for a sleeve connection with the other end of an identical or conventional, in particular standardized pipe, in which the inner pipe and outer pipe are co-extruded, characterized in that the sleeve is injection-molded and attached to one end of the pipe section. 2. Leitungsrohr nach Anspruch 1, bei dem das andere Ende des Rohrstückes als Spitzenden ausgebildet ist, dadurch gekennzeichnet, daß das Spitzende spritzgegossen und an das andere Ende des Rohrstückes angesetzt ist.2. Conduit according to claim 1, in which the other end of the pipe section is designed as a spigot end, characterized in that the spigot end is injection-molded and attached to the other end of the pipe section. 3. Leitungsrohr nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Muffe und/oder das Spitzende an das Rohrstück angespritzt ist.3. Conduit pipe according to claim 1 or 2, characterized in that the socket and/or the spigot end is injection-molded onto the pipe section. 4. Leitungsrohr nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Muffe und/oder das Spitzende an das Rohrstück angeschweißt ist.4. Pipe according to one of claims 1 to 3, characterized in that the socket and/or the spigot end is welded to the pipe section. 5. Leitungsrohr nach Anspruch 4, dadurch gekennzeichnet, daß die Muffe und/oder das Spitzende im Spiegelstumpf geschweißt ist.5. Pipe according to claim 4, characterized in that the socket and/or the spigot end is welded in the mirror stub. 6. Leitungsrohr nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Muffe und/oder das Spitzende im Ultraschall geschweißt ist.6. Pipe according to claim 4 or 5, characterized in that the socket and/or the spigot end is welded using ultrasound. 7. Leitungsrohr nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Muffe und/oder das Spitzende an das Rohrstück geklebt ist.7. Conduit pipe according to one of claims 1 to 6, characterized in that the socket and/or the spigot end is glued to the pipe section. 8. Leitungsrohr nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Rohrstück zwischen aneinandergrenzenden Wellenbergen des Außenrohres endet.8. Conduit pipe according to one of claims 1 to 7, characterized in that the pipe section ends between adjacent wave crests of the outer pipe. 9. Leitungsrohr nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß Innenrohr und/oder Außenrohr sowie Muffe und/oder Spitzende aus PVC oder PET extrudiert sowie gespritzt sind.9. Conduit pipe according to one of claims 1 to 8, characterized in that the inner pipe and/or outer pipe as well as the socket and/or spigot end are extruded and injection-molded from PVC or PET.
DE9111628U 1991-08-23 1991-08-23 Plastic pipe Expired - Lifetime DE9111628U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9111628U DE9111628U1 (en) 1991-08-23 1991-08-23 Plastic pipe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4128057A DE4128057A1 (en) 1991-08-23 1991-08-23 Twin wall rigid plastic pipe mfr. esp. for waste water - by co-extruding smooth wall inner and wave profiled outer wall and injection moulding socket and plug ends, etc.
DE9111628U DE9111628U1 (en) 1991-08-23 1991-08-23 Plastic pipe

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DE9111628U1 true DE9111628U1 (en) 1991-12-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018714A1 (en) * 1994-01-04 1995-07-13 Big 'o' Inc. A method and apparatus for producing a bell joint
ITRA20110012A1 (en) * 2011-03-30 2011-06-29 Ipm S R L PRODUCTION SYSTEM OF A JOINT FOR CORRUGATED TUBES IN PLASTIC MATTER WITH ANNEXED SEALING GASKET
EP2727700A1 (en) * 2012-10-31 2014-05-07 Ipm S.R.L. Injection system for producing a bell joint at the axial end of a polyolefin-type plastic pipe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018714A1 (en) * 1994-01-04 1995-07-13 Big 'o' Inc. A method and apparatus for producing a bell joint
ITRA20110012A1 (en) * 2011-03-30 2011-06-29 Ipm S R L PRODUCTION SYSTEM OF A JOINT FOR CORRUGATED TUBES IN PLASTIC MATTER WITH ANNEXED SEALING GASKET
EP2505331A1 (en) 2011-03-30 2012-10-03 Ipm S.R.L. Method of production of a joint for corrugated pipes in plastic material with annexed sealing gasket
EP2727700A1 (en) * 2012-10-31 2014-05-07 Ipm S.R.L. Injection system for producing a bell joint at the axial end of a polyolefin-type plastic pipe

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