An extrusion method, an extruder and a product prepared with...

Details An extrusion method, an extruder and a product prepared with... An extrusion method, an extruder and a product prepared with...

B - Operations, Transporting

29

C

B29C 47/48 (2006.01) B29B 15/12 (2006.01) B29C 47/24 (2006.01) B29C 47/52 (2006.01) B29C 70/50 (2006.01)

Patent

CA 2249453

The extruder comprises at least one conical stator (1, 2) and at least one rotatable conical rotor (3). The rotor (3) is mounted from its widest point with bearings (12a, 12b) in such a way that the first bearing (12a) receives the forces acting in one axial direction of the rotor (3) and the second bearing (12b) receives the forces acting in the opposite axial direction of the rotor (3). The invention provides a very firm bearing arrangement, whereupon it is also possible to produce an extruded product that contains at least 0.5 % of a slip agent and substantially no weld lines.

L'invention porte sur un procédé d'extrusion, ainsi que sur une extrudeuse et un article confectionné à l'aide de ce procédé. L'extrudeuse comporte au moins un stator conique (1, 2) et au moins un rotor conique rotatif (3). La partie la plus large ce rotor (3) repose sur des paliers (12a, 12b) de manière à ce que le premier palier (12a) supporte les forces s'exerçant dans une direction axiale du rotor (3) et que le second palier (12b) supporte les forces s'exerçant dans la direction axiale opposée du rotor (3). Cette invention assure un agencement de paliers très résistant et permet, de la sorte, de produire un produit extrudé contenant au moins 5 % d'un agent glissant et exempt, dans une large mesure, de lignes d'accolement.

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