A method for manufacturing a joint pipe

B - Operations – Transporting – 29 – C

Patent

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B29C 53/62 (2006.01) B29C 53/58 (2006.01) B29C 65/00 (2006.01) B29C 70/76 (2006.01) F16L 47/06 (2006.01) B29C 33/02 (2006.01) B29C 35/16 (2006.01)

Patent

CA 2109113

The present invention relates to a method for manufacturing a joint pipe (1) from a spirally wound thermoplastic profile (7) at an end of a thermoplastic pipe (4). The invention is characterized in that the end of the pipe (4), which will be furnished with a joint pipe (1), is pushed onto a rotatably driven, weakly conical mandrel (2), after which a melt profile (7) of thermoplast is spirally extruded with a certain overlapping around the mandrel (2) and the pipe end (4),starting farthest away from the pipe (4), until the desired overlapping between the joint pipe (I) and the pipe end (4) is obtained, the joint pipe (1) is cooled and the end surface of is is cut uniform, after which the pipe (4) furnisbed with the joint pipe is removed from the mandrel (2).

La présente invention se rapporte à un procédé de fabrication d'un tuyau de liaison (1) à partir d'un profil thermoplastique spiralé (7) à l'extrémité d'un tuyau thermoplastique (4). L'invention est caractérisée en ce que l'extrémité du tuyau (4) devant être équipée d'un tuyau de liaison (1), est positionnée sur un mandrin (2) légèrement conique et entraîné en rotation, un profil de fusion (7) en matière synthétique thermoplastique étant alors extrudé en spirale de façon à recouvrir plus ou moins le mandrin (2) ainsi que l'extrémité du tuyau (4), en commençant le plus loin possible du tuyau (4), jusqu'à l'obtention du recouvrement désiré entre le tuyau de liaison (1) et l'extrémité du tuyau (4). Après refroidissement du tuyau de liaison (1), sa surface d'extrémité est découpée de manière uniforme. Enfin, le tuyau équipé du tuyau de liaison est retiré du mandrin.

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