B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/00 (2006.01) B29C 47/12 (2006.01)
Patent
CA 2702621
A method and an apparatus for producing an endless double- walled pipe having corrugated pipe sections and sleeve pipe sections are described. The production is effected by extrusion of an outer tube (Sa), forming the outer pipe of the double-walled pipe, and of an inner tube (Si), forming the inner tube of the double-walled pipe, in a molding passage (10) having sections with a corrugated molding surface and a smooth cylindrical sleeve molding surface. To shape the sleeve section, the outer tube is extruded into the sleeve molding surface and is brought into contact with the sleeve molding surface. The inner tube (Si) is then extruded into the outer tube (Sa), already in contact over the entire axial length of the sleeve molding surface, and is brought in the process into contact with the inner side of said outer tube (Sa) that is in contact.
L'invention concerne un procédé et un dispositif de fabrication d'un tube sans fin à double paroi ayant des tronçons de tube ondulé et des tronçons de manchon de raccord. La fabrication s'effectue par extrusion d'un tuyau souple externe (Sa) formant le tube extérieur du tube à double paroi et d'un tuyau souple interne (Si) formant le tube intérieur du tube à double paroi, dans un canal de formage (10) ayant des tronçons à surface de formage ondulée et des tronçons à surface de formage de manchon, cylindrique et lisse. Pour former le tronçon de manchon, le tuyau souple externe est extrudé dans la surface de formage de manchon, et amené en application contre la surface de formage de manchon. Le tuyau souple interne (Si) est ensuite extrudé dans le tuyau souple externe (Sa) déjà appliqué sur toute la longueur de la surface de formage de manchon, en étant amené en application contre la face intérieure de ce tuyau souple externe appliqué.
Gowling Lafleur Henderson Llp
Unicor Gmbh
LandOfFree
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