B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/88 (2006.01)
Patent
CA 2210393
Method for producing a tubular profile (7) made of thermoplastic material, comprising the extrusion of the tubular profile (7) using an extruder (1), the external (3) and internal (5) cooling, respectively, downstream of the extruder (1), of the tubular profile (7) emerging from the extruder with the aid of an external cooling unit (3) and an internal cooling unit (5) mounted on the extruder (1), and the exertion of a tensile force on the cooled tubular profile (7) downstream of the cooling units by means of a pulling device (4). When production of the tubular profile (7) is started by setting the extruder (1) in operation, the internal cooling unit (5) is omitted and when a tensile force is inserted on the extruded and externally cooled section by the pulling device (4), the internal cooling unit (5) is introduced into the tubular profile (7) from the open end (8) of the latter and mounted on the extruder (1).
Procédé de production d'un profilé tubulaire (7) en matière thermoplastique, consistant à extruder le profilé tubulaire (7) à l'aide d'une extrudeuse (1), à refroidir extérieurement (3) et intérieurement (5), en aval de l'extrudeuse (1), le profilé tubulaire (7) sortant de cette dernière, au moyen d'une unité de refroidissement externe (3) et d'une unité de refroidissement interne (5) montée sur l'extrudeuse (1), et à soumettre le profilé tubulaire (7) extrudé à un effort de traction en aval des unités de refroidissement, au moyen d'un dispositif de traction (4). Lorsqu'on lance la production du profilé tubulaire (7) en mettant l'extrudeuse (1) en marche, on enlève l'unité de refroidissement interne, et lorsque l'effort de traction est imprimé par le dispositif de traction (4) au profilé extrudé et refroidi extérieurement, on introduit l'unité de refroidissement interne dans le profilé tubulaire (7) par son extrémité ouverte (8), et on la monte sur l'extrudeuse (1).
Prenger Jan Hendrik
Visscher Jan
Gowling Lafleur Henderson Llp
Wavin B.v.
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