B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/00 (2006.01) B29C 53/60 (2006.01) B29C 53/78 (2006.01) B29C 65/10 (2006.01) B29D 23/00 (2006.01) B65H 81/00 (2006.01) B29C 65/40 (2006.01)
Patent
CA 2305239
Hollow thermoplastic foam tubes of any desired diameter are easily achieved as well as large sheets or planks of thermoplastic foam material in any width and thickness desired by wrapping and fusing a thermoplastic foam profile (22) having a desired size and shape. By employing a thermoplastic foam extruder (21) to produce a profile (22) having a desired cross-sectional shape or configuration, and advancing the profile onto a rotating support member (30) for being wrapped peripherally surrounding the rotating support and continuously bonding the abutting edges of the profile (22) as it is spirally wound. By employing this unique spiral forming process, a hollow cylindrical thermoplastic foam tube (28) is formed on a continuous basis, with the length thereof being controlled by necessity. In addition, any desired diameter can be formed by employing a rotating support having the desired diameter, with the thickness of the tube being controlled by the thickness of the profile formed by extrusion equipment (21).
Des tubes creux en mousse thermoplastique de tout diamètre voulu ainsi que des feuilles ou planches en mousse thermoplastique de toute largeur et épaisseur voulues peuvent être aisément obtenus par rubanage et fusion d'un profilé en mousse thermoplastique (22) ayant la taille et la forme requises. Le procédé consiste à utiliser une extrudeuse (21) de mousse thermoplastique pour réaliser un profilé (22) ayant la configuration et la forme de coupe transversale requises, et en faisant avancer ledit profilé sur un organe de support rotatif (30) pour son rubanage périphérique autour du support rotatif et le collage en continu des bords jointifs dudit profilé (22) au fur et à mesure de son enroulement en spirale. L'utilisation de ce procédé unique pour produire une forme spirale permet d'obtenir en continu un tube (32) creux en mousse thermoplastique, dont la longueur est obligatoirement contrôlée. En outre, on peut obtenir tout diamètre requis en utilisant un support rotatif ayant le diamètre voulu, l'épaisseur du tube étant contrôlée par l'épaisseur du profilé formé par l'équipement d'extrusion (21).
Macrae & Co.
Nomaco Inc.
LandOfFree
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