Thermoplastic tube

Details Thermoplastic tube Thermoplastic tube

B - Operations, Transporting

29

C

B29C 47/88 (2006.01) B29C 47/00 (2006.01) B29C 47/90 (2006.01) B29C 55/26 (2006.01) B29C 57/04 (2006.01)

Patent

CA 2364488

Method for producing a tube section (6) from thermoplastic material, in which a tube section (6) is extruded by means of an extruder (1) which is provided with an extruder die (3) having an inner core (5), which inner core (5) defines an axial hollow space in the tube section (6), the tube section coming out of the extruder die (3) downstream of the extruder die (3) being internally cooled by means of an internal cooling member and externally cooled by means of an external cooling device. Immediately after the tube section (6) leaves the extruder die (3), the internal cooling member brings about internal cooling of the tube. The external cooling device (15) is positioned downstream of the internal cooling member, so that the external cooling of the tube section is brought about after the internal cooling.

L'invention concerne un procédé de production d'un segment (6) de tube à partir d'une matière thermoplastique, selon lequel un segment (6) de tube est extrudé au moyen d'une extrudeuse (1) qui comporte une filière d'extrusion (3) pourvue d'un noyau central (5), lequel définit un espace creux axial dans le segment (6) de tube. L'évacuation du segment de tube de la filière d'extrusion (3) s'effectue postérieurement au refroidissement intérieur de ladite filière (3) au moyen d'un élément de refroidissement interne et au refroidissement extérieur de la filière au moyen d'un dispositif de refroidissement externe. Immédiatement après l'évacuation du segment (6) de tube de la filière d'extrusion (3), l'élément de refroidissement interne refroidit l'intérieur du tube. Le dispositif de refroidissement externe (15) est placé en aval de l'élément de refroidissement interne de façon que le refroidissement extérieur du segment de tube se produise après le refroidissement intérieur.

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