Extruder

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 47/52 (2006.01) B29B 15/12 (2006.01) B29C 47/06 (2006.01) B29C 47/24 (2006.01) B29C 47/76 (2006.01) F16L 9/12 (2006.01)

Patent

CA 2244721

The invention relates to an extruder comprising at least two conical stators and at least one rotatable rotor situated between the stators. The extruder comprises a supply conduit (3) for supplying material into the space between the stators (2), and the rotor (1) comprises at the orifice of the supply conduit (3) openings (5) via which the material to be supplied can flow to the interior of the rotor (1). The end of the supply conduit (3) and ducts formed of the openings (5) and/or grooves (7, 7a, 7b) of the rotor (1) are designed in such a way that the sum of the areas of the sections of ducts visible at the end of the supply conduit (3) remains substantially constant at each moment when the rotor (1) rotates. In such a case, the material to be supplied through the supply conduit (3) can flow evenly from the supply conduit (3) to the grooves (7, 7a, 7b) of the rotor (1) and via the openings (5) so that there will be no pumping effect in the flow of material.

Extrudeuse comportant au minimum deux stators coniques et un rotor situé entre ces deux stators. L'extrudeuse comporte une conduite d'amenée (3) acheminant la matière dans un espace compris entre les stators (2), tandis que le rotor (1) comporte au niveau de l'orifice de la conduite d'amenée (3) des ouvertures (5) par lesquelles la matière peut s'écouler en direction de l'intérieur du rotor (1). L'extrémité de la conduite d'amenée (3) et les voies constituées par les ouvertures (5) et/ou les rainures (7, 7a, 7b) du rotor (1) sont conçues de telle sorte que la somme des surfaces des sections transversales de ces voies visibles à l'extrémité de la conduite d'amenée (3) demeure sensiblement constante à tout moment de la rotation du rotor (1). Dans ces conditions, la matière devant être acheminée par la conduite d'amenée (3) peut s'écouler de manière régulière depuis le conduit d'amenée (3) en direction des rainures (7, 7a, 7b) du rotor (1) et par les ouvertures (5), ce qui permet d'éviter tout phénomène de pompage dans le flux de cette matière.

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