DE19601240B4 - Process for welding a plastic jacket - Google Patents

Process for welding a plastic jacket Download PDF

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Publication number
DE19601240B4
DE19601240B4 DE19601240A DE19601240A DE19601240B4 DE 19601240 B4 DE19601240 B4 DE 19601240B4 DE 19601240 A DE19601240 A DE 19601240A DE 19601240 A DE19601240 A DE 19601240A DE 19601240 B4 DE19601240 B4 DE 19601240B4
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Prior art keywords
flat part
pipe
plastic
tube
outer ring
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Expired - Fee Related
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DE19601240A
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German (de)
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DE19601240A1 (en
Inventor
Peter Steins
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POLYTETRA GMBH, 41189 MOENCHENGLADBACH, DE
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Polytetra Draack and Meyer GmbH
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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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8264—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using the thermal expansion 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential 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
    • B29C66/70—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
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • 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

Abstract

Verfahren zum Verschweißen einer Kunststoffummantelung (2) eines Rohres (1) mit einer Kunststoffummantelung (7) eines an einem Stirnende des Rohres anzubringenden Flachteils (6) mit folgenden Schritten:
Arretieren des Flachteils (6) an dem Stirnende (5) des Rohres (1) mittels einer das Flachteil (6) durchfassenden und im Rohrinneren befestigten, beheizbar ausgebildeten Montageeinrichtung (10),
Aufbringen einer Kragenbuchse (18) auf den Stirnendbereich der Außenseite der Kunststoffummantelung (2) des Rohres (1), derart, daß der Kragen (19) gegen die Kunst stoffummantelung (7) des Flachteils (6) zur Anlage kommt,
Anlegen eines beheizbaren Außenringes (20) gegen die der Kunststoffummantelung (7) des Flachteils (6) abgewandte Seite des Kragens (19) und Arretieren des Außenringes (20) relativ zu dem Rohr (1),
Beheizen der Montageeinrichtung (10) und des Außenrings (20), derart, daß durch Wirkung der aufgebrachten Wärme die gegeneinander anliegenden Bereiche der Kunststoffummantelung (2) des Rohres (1) und der Kunststoffummantelung (7) des Flachteils (6) miteinander verschweißt werden, wobei der...Method for welding a plastic jacket (2) of a pipe (1) to a plastic jacket (7) of a flat part (6) to be attached to an end of the pipe, with the following steps:
Locking the flat part (6) to the front end (5) of the tube (1) by means of a heatable mounting device (10) which grips the flat part (6) and is fastened in the interior of the tube,
Applying a collar bushing (18) to the front end area of the outside of the plastic casing (2) of the tube (1) in such a way that the collar (19) comes into contact with the plastic casing (7) of the flat part (6),
Placing a heatable outer ring (20) against the side of the collar (19) facing away from the plastic casing (7) of the flat part (6) and locking the outer ring (20) relative to the tube (1),
Heating the assembly device (10) and the outer ring (20) in such a way that the areas of the plastic casing (2) of the tube (1) and the plastic casing (7) of the flat part (6) which are in contact with one another are welded together by the effect of the heat applied, where the ...

Figure 00000001
Figure 00000001

Description

Die Erfindung betrifft ein Verfahren zum Verschweißen einer Kunststoffummantelung eines Rohres mit einer Kunststoffummantelung eines an einem Stirnende des Rohres anzubringenden Flachteils.The invention relates to a method for welding a plastic jacket of a pipe with a plastic jacket a flat part to be attached to an end face of the tube.

Rohre mit einem an den Rohrstirnenden angebrachten Flachteil werden beispielsweise in Rauchgas-Entschwefelungsanlagen als Abstandshalter in Wärmeaustauschern eingesetzt. Da die Rohre und die Flachteile aggressiven Medien ausgesetzt sind, werden diese jeweils mit einer Kunststoffummantelung versehen, um einer Zerstörung durch Korrosion vorzubeugen. Das Aufbringen der Kunststoffummantelung auf die Rohre erfolgt durch Überziehen der Rohre mit je einem Kunststoffrohr, und das Aufbringen der Kunststoffummantelung auf die Flachteile erfolgt durch Überziehen der Flachteile mittels eines Schrumpfschlauches oder einer Folie. Nach der Verbindung des Flachteils mit dem Rohrstirnende besteht das Problem, die beiden Kunststoffummantelungen, nämlich die Kunststoffummantelung des Flachteils und die Kunststoffummantelung des Rohres, korrosionsdicht miteinander zu verbinden.Pipes with one on the pipe ends attached flat part are, for example, in flue gas desulfurization plants as a spacer in heat exchangers used. Because the pipes and the flat parts are exposed to aggressive media are each provided with a plastic coating, for destruction to prevent corrosion. The application of the plastic coating on the pipes is done by covering of the tubes with a plastic tube, and the application of the plastic jacket on the flat parts is done by covering the flat parts with a shrink tube or a film. After connecting the Flat part with the pipe end there is the problem, the two Plastic jackets, namely the plastic casing of the flat part and the plastic casing of the Pipe to be connected to one another in a corrosion-tight manner.

Hierzu schlägt die Erfindung ein Schweißverfahren vor, welches durch folgende Schritte gekennzeichnet ist:
Arretieren des Flachteils an dem Stirnende des Rohres mittels einer das Flachteil durchfassenden und im Rohrinneren befestigten, beheizbar ausgebildeten Montageeinrichtung,
Aufbringen einer Kragenbuchse auf den Stirnendbereich der Außenseite der Kunststoffummantelung des Rohres, derart, daß der Kragen gegen die Kunststoffummantelung des Flachteils zur Anlage kommt, wobei die Kragenbuchse dazu dient, die während des Schweißvorganges plastisch (flüssig) werdenden Komponenten im Schweißbereich zu fixieren,
Anlegen eines beheizbaren Außenrings gegen die der Kunststoffummantelung des Flachteils abgewandte Seite des Kragens und Arretieren des Außenrings relativ zu dem Rohr,
Beheizen der Montageeinrichtung und des Außenrings, derart, daß durch Wirkung der aufgebrachten Wärme die gegeneinander anliegenden Bereiche der Kunststoffummantelung des Rohres und der Kunststoffummantelung des Flachteils miteinander verschweißt werden, wobei der für den Schweißvorgang erforderliche Schweißdruck durch die Wirkung der Wärmeausdehnung des Rohres und des Außenrings erzeugt wird, und
Entfernen der Montageeinrichtung und endgültige Arretierung des Flachteils an dem Stirnende des Rohres sowie Entfernen des Außenrings.To this end, the invention proposes a welding process which is characterized by the following steps:
Locking the flat part at the front end of the tube by means of a heatable mounting device which grips the flat part and is fastened in the interior of the tube,
Applying a collar bushing to the front end area of the outside of the plastic casing of the tube in such a way that the collar comes into contact with the plastic casing of the flat part, the collar bushing serving to fix the components that become plastic (liquid) during the welding process in the welding area,
Placing a heatable outer ring against the side of the collar facing away from the plastic casing of the flat part and locking the outer ring relative to the tube,
Heating the mounting device and the outer ring in such a way that the areas of the plastic casing of the pipe and the plastic casing of the flat part which are in contact with one another are welded to one another by the action of the applied heat, the welding pressure required for the welding process being generated by the effect of the thermal expansion of the pipe and the outer ring will, and
Removal of the assembly device and final locking of the flat part at the front end of the tube and removal of the outer ring.

In weiterer Ausgestaltung der Erfindung kann vorgesehen sein, daß vor dem Aufbringen der Kragenbuchse eine Schweißfilmfolie im äußeren Stirnendbereich der Außenseite der Kunststoffummantelung des Rohres aufgebracht wird. Vorzugsweise wird die Schweißfilmfolie in eine Aussparung der Kunststoffummantelung des Rohres eingebracht, so daß die jeweiligen Außenoberflächen der Kunststoffummantelung des Rohres und der aufgebrachten Schweißfilmfolie miteinander fluchten. Dabei trägt die bei der Beheizung entstehende Wärmedehnung der Schweißfilmfo lie mit zur Bildung des für den Schweißvorgang erforderlichen Schweißdruckes bei.In a further embodiment of the invention be provided that before the application of the collar bushing a sweat film in the outer front area the outside the plastic coating of the pipe is applied. Preferably becomes the sweat film introduced into a recess in the plastic casing of the tube, so that the respective outer surfaces of the Plastic coating of the pipe and the applied welding film cursed with each other. Doing so the thermal expansion of the welding film film that occurs during heating with the formation of for the welding process required welding pressure at.

Die Ummantelung des Flachteils kann durch Umhüllen des Flachteils mit einem Schrumpfschlauch oder durch Überziehen mit einer Folie aufgebracht werden. Die Kunststoffummantelung des Rohres kann durch Überziehen eines Kunststoffrohres auf das Rohr aufgebracht werden.The sheathing of the flat part can by wrapping the flat part with a shrink tube or by covering be applied with a film. The plastic coating of the pipe can by pulling on a plastic tube can be applied to the tube.

Bei dem erfindungsgemäßen Verfahren ist besonders vorteilhaft, daß hierdurch ein sicheres Verschweißen quer zueinander angeordneter Kunststoffummantelungen erfolgt, wobei der für den Schweißvorgang erforderliche Schweißdruck dadurch aufgebracht wird, daß die zwangsläufig auftretende Wärmedehnung insbsondere des Rohres in Richtung der zu verschweißenden Kunststoffummantelungen wirkt. Auf diese Weise sind keine zusätzlichen Maßnahmen zum Aufbringen eines geeigneten Schweißdruckes erforderlich.In the method according to the invention is particularly advantageous in that safe welding transversely arranged plastic sheathing takes place, wherein the for the welding process required welding pressure is applied in that the inevitably thermal expansion occurring especially the pipe in the direction of the plastic sheathing to be welded acts. This way there are no additional measures to apply a suitable welding pressure required.

Die Erfindung wird nachfolgend anhand des in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:The invention is described below of the embodiment shown schematically in the drawing explained in more detail. It demonstrate:

1 eine schematische Längsschnittdarstellung des Stirnendes eines Rohres mit einem an dessen Stirnende mittels einer Montageeinrichtung angebrachten Flachteils während des Schweißvorganges; 1 is a schematic longitudinal sectional view of the front end of a tube with a flat part attached to the end thereof by means of a mounting device during the welding process;

2 eine schematische Längsschnittdarstellung des Stirnendes des Rohres nach dem Schweißvorgang und nach Entfernen der Montageeinrichtung und des beheizbaren Außenrings. 2 is a schematic longitudinal sectional view of the front end of the tube after the welding process and after removing the mounting device and the heatable outer ring.

Ein aus Metall bestehendes Rohr 1 ist von einer rohrförmigen Kunststoffummantelung 2 umgeben. In einer Ausnehmung 3 im äußeren Stirnendbereich der Kunststoffummantelung 2 befindet sich eine Schweißfilmfolie 4. Gegen das Stirnende 5 des Roh res 1 liegt ein als Blechteil ausgebildetes Flachteil 6 an, welches beidseitig eine Kunststoffummantelung 7 aufweist. Das erfindungsgemäße Verfahren dient dazu, die Kunststoffummantelung 2 mit der Kunststoffummantelung 7 im Bereich 8 miteinander zu verschweißen.A pipe made of metal 1 is from a tubular plastic sheathing 2 surround. In a recess 3 in the outer end area of the plastic casing 2 there is a sweat film 4 , Towards the forehead 5 of the raw res 1 is a flat part designed as a sheet metal part 6 which has a plastic coating on both sides 7 having. The method according to the invention serves to cover the plastic 2 with the plastic coating 7 in the area 8th to weld together.

Das Rohr 1 weist in seinem Stirnendbereich ein Innengewinde 9 auf, in welches eine als beheizbarer Montagedorn ausgebildete Montageeinrichtung 10 mit einem Außengewinde 11 einschraubbar ist. Um ein Einschrauben zu ermöglichen, weist das Flachteil 6 eine abgeschrägt ausgebildete Öffnung 12 auf, welche von dem in 1 rechts dargestellten Bereich 13 der Montageeinrichtung 10 durchfaßt werden kann. Der Bereich 13 geht mit Schrägen 14, welche den Schrägen 12 entsprechend ausgebildet sind, in einen Bereich 15 über. Am Stirnende 16 weist die Montageeinrichtung 10 eine Aufnahmeeinrichtung 17 für ein Schraubwerkzeug (nicht dargestellt) auf. Wie ohne weiteres ersichtlich, kann durch Einschrauben der Montageeinrichtung 10 in der in 1 gezeigten Weise das Flachteil 6 an dem Stirnende des Rohres 1 befestigt werden.The pipe 1 has an internal thread in its front area 9 in which an assembly device designed as a heatable assembly mandrel tung 10 with an external thread 11 can be screwed in. In order to enable screwing in, the flat part has 6 a chamfered opening 12 on which of the in 1 area shown on the right 13 the assembly facility 10 can be grasped. The area 13 goes with slopes 14 which the slopes 12 are appropriately trained in one area 15 about. At the forehead 16 instructs the assembly facility 10 a reception facility 17 for a screwing tool (not shown). As can be easily seen, screwing in the mounting device 10 in the in 1 shown the flat part 6 at the end of the pipe 1 be attached.

Anschließend wird eine Kragenbuchse 18 mit einem Kragen 19 auf den Stirnendbereich der Außenseite der Kunststoffummantelung 2 des Rohres 1 aufgebracht, derart, daß der Kragen 19 gegen die Kunststoffummantelung 7 des Flachteils 6 anliegt. Dann erfolgt das Anlegen eines beheizbaren Außenringes 20 gegen die der Kunststoffummantelung 7 abgewandte Seite des Kragens 19. Weiterhin wird der Außenring mittels einer (nicht dargestellten) Einrichtung relativ zu dem Rohr und dem mittels der Montageeinrichtung 10 daran angebrachten Flachteil 6 arretiert.Then a collar bushing 18 with a collar 19 on the front end area of the outside of the plastic casing 2 of the pipe 1 applied such that the collar 19 against the plastic coating 7 of the flat part 6 is applied. Then a heatable outer ring is put on 20 against that of the plastic casing 7 opposite side of the collar 19 , Furthermore, the outer ring is relative to the tube and that by means of the mounting device by means (not shown) 10 attached flat part 6 locked.

Danach werden sowohl die Montageeinrichtung 10 als auch der Außenring 20 beheizt. Über eine (nicht dargestellte) Regeleinrichtung wird dafür Sorge getragen, daß eine bestimmte Temperatur über einen bestimmten Zeitraum erzeugt wird. Dabei wird der erforderliche Schweißdruck durch die Wärmeausdehnung des Rohres 1 und auch der Schweißfolie 4 aufgebracht, so daß im Ergebnis die Kunststoffummantelung 2 im Stirnendbereich 8 mit der Kunststoffummantelung 7 sicher verschweißt wird.After that, both the assembly facility 10 as well as the outer ring 20 heated. A control device (not shown) ensures that a certain temperature is generated over a certain period of time. The required welding pressure is determined by the thermal expansion of the pipe 1 and also the welding foil 4 applied so that, as a result, the plastic casing 2 in the end region 8th with the plastic coating 7 is securely welded.

Nach Beendigung des Schweißvorganges wird die Montageeinrichtung 10 herausgeschraubt und durch eine Schraube 21 (2) ersetzt. Die Schraube 21 weist eine Ausnehmung 22 zur Aufnahme eines Schraubwerkzeuges (nicht dargestellt) auf. Anschließend wird eine Kunststoffabdeckung 23 auf die Schraube 21 aufgebracht und in den Bereichen 24 und 25 in herkömmlicher Weise mit der Kunststoffummantelung 7 verschweißt.After the welding process, the assembly device 10 unscrewed and by a screw 21 ( 2 ) replaced. The screw 21 has a recess 22 to hold a screwing tool (not shown). Then a plastic cover 23 on the screw 21 upset and in the fields 24 and 25 in a conventional way with the plastic jacket 7 welded.

Claims (5)

Verfahren zum Verschweißen einer Kunststoffummantelung (2) eines Rohres (1) mit einer Kunststoffummantelung (7) eines an einem Stirnende des Rohres anzubringenden Flachteils (6) mit folgenden Schritten: Arretieren des Flachteils (6) an dem Stirnende (5) des Rohres (1) mittels einer das Flachteil (6) durchfassenden und im Rohrinneren befestigten, beheizbar ausgebildeten Montageeinrichtung (10), Aufbringen einer Kragenbuchse (18) auf den Stirnendbereich der Außenseite der Kunststoffummantelung (2) des Rohres (1), derart, daß der Kragen (19) gegen die Kunst stoffummantelung (7) des Flachteils (6) zur Anlage kommt, Anlegen eines beheizbaren Außenringes (20) gegen die der Kunststoffummantelung (7) des Flachteils (6) abgewandte Seite des Kragens (19) und Arretieren des Außenringes (20) relativ zu dem Rohr (1), Beheizen der Montageeinrichtung (10) und des Außenrings (20), derart, daß durch Wirkung der aufgebrachten Wärme die gegeneinander anliegenden Bereiche der Kunststoffummantelung (2) des Rohres (1) und der Kunststoffummantelung (7) des Flachteils (6) miteinander verschweißt werden, wobei der für den Schweißvorgang erforderliche Schweißdruck insbesondere durch die Wärmeausdehnung des Rohres erzeugt wird, und Entfernen der Montageeinrichtung (10) und endgültige Arretierung des Flachteils (6) an dem Stirnende (5) des Rohres (1) sowie Entfernen des Außenrings (20).Process for welding a plastic jacket ( 2 ) a pipe ( 1 ) with a plastic coating ( 7 ) a flat part to be attached to one end of the tube ( 6 ) with the following steps: locking the flat part ( 6 ) at the forehead ( 5 ) of the pipe ( 1 ) by means of a flat part ( 6 ) comprehensive and heatable mounting device fixed inside the pipe ( 10 ), Application of a collar bushing ( 18 ) on the front end area of the outside of the plastic casing ( 2 ) of the pipe ( 1 ) such that the collar ( 19 ) against the plastic coating ( 7 ) of the flat part ( 6 ) comes into contact, create a heatable outer ring ( 20 ) against that of the plastic coating ( 7 ) of the flat part ( 6 ) opposite side of the collar ( 19 ) and locking the outer ring ( 20 ) relative to the pipe ( 1 ), Heating the assembly device ( 10 ) and the outer ring ( 20 ), in such a way that the areas of the plastic casing lying against each other by the effect of the applied heat ( 2 ) of the pipe ( 1 ) and the plastic coating ( 7 ) of the flat part ( 6 ) are welded together, the welding pressure required for the welding process being generated in particular by the thermal expansion of the tube, and removal of the assembly device ( 10 ) and final locking of the flat part ( 6 ) at the forehead ( 5 ) of the pipe ( 1 ) and removing the outer ring ( 20 ). Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß vor dem Aufbringen der Kragenbuchse (18) eine Schweißfilmfolie (4) im äußeren Stirnendbereich der Außenseite der Kunststoffummantelung (2) des Rohres (1) aufgebracht wird.Method according to Claim 1, characterized in that before the collar bushing ( 18 ) a film of sweat film ( 4 ) in the outer front area of the outside of the plastic jacket ( 2 ) of the pipe ( 1 ) is applied. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Schweißfilmfolie (4) in einer Ausnehmung (3) der Kunststoffummantelung (2) des Rohres (1) angebracht wird.Method according to claim 2, characterized in that the welding film foil ( 4 ) in a recess ( 3 ) the plastic coating ( 2 ) of the pipe ( 1 ) is attached. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Ummantelung (7) des Flachteils (6) durch Umhüllen des Flachteils (6) mit einem Schrumpfschlauch aufgebracht wird.Method according to one of claims 1 to 3, characterized in that the casing ( 7 ) of the flat part ( 6 ) by wrapping the flat part ( 6 ) is applied with a shrink tube. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Ummantelung des Flachteils (6) durch Umhüllen des Flachteils (6) mit einer Folie aufgebracht wird.Method according to one of claims 1 to 3, characterized in that the sheathing of the flat part ( 6 ) by wrapping the flat part ( 6 ) is applied with a film.
DE19601240A 1995-12-29 1996-01-15 Process for welding a plastic jacket Expired - Fee Related DE19601240B4 (en)

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DE19549137 1995-12-29
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110435162A (en) * 2019-08-13 2019-11-12 黎志洋 A kind of PPR pipe sweating soldering device

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN112757651A (en) * 2019-10-21 2021-05-07 佛山市雁元绿田塑料管有限公司 Welding method for double-layer thermoplastic plastic pipe

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DE3434015A1 (en) * 1984-09-15 1986-03-27 REHAU AG + Co, 8673 Rehau Process for welding preformed plastics connection sockets to the associated free ends of plastic pipes
US4670207A (en) * 1984-12-26 1987-06-02 Sekisui Kagaku Kogyo Kabushiki Kaisha Method of bonding plastic pipes

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Publication number Priority date Publication date Assignee Title
DE3434015A1 (en) * 1984-09-15 1986-03-27 REHAU AG + Co, 8673 Rehau Process for welding preformed plastics connection sockets to the associated free ends of plastic pipes
US4670207A (en) * 1984-12-26 1987-06-02 Sekisui Kagaku Kogyo Kabushiki Kaisha Method of bonding plastic pipes

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110435162A (en) * 2019-08-13 2019-11-12 黎志洋 A kind of PPR pipe sweating soldering device
CN110435162B (en) * 2019-08-13 2021-08-24 山东华航高分子材料有限公司 PPR pipe hot melt welding device

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