Method for making a product to be extruded, and an extruder

Details Method for making a product to be extruded, and an extruder Method for making a product to be extruded, and an extruder

B - Operations, Transporting

29

C

B29C 47/48 (2006.01) B29B 15/12 (2006.01) B29C 44/22 (2006.01) B29C 47/00 (2006.01) B29C 47/02 (2006.01) B29C 47/06 (2006.01) B29C 47/24 (2006.01) B29C 47/52 (2006.01) B29C 47/76 (2006.01) B29C 47/90 (2006.01) B29C 47/92 (2006.01) B29C 47/94 (2006.01) B29C 55/24 (2006.01) B29C 63/34 (2006.01) B32B 1/08 (2006.01) F16L 9/12 (2006.01) F16L 9/147 (2006.01) F16L 9/21 (2006.01) F16L 11/15 (2006.01) F16L 55/162 (2006.01) B29C 53/58 (2006.01)

Patent

CA 2250306

The invention relates to a method for making a product to be extruded, and an extruder. The extruder comprises at least two conical stators (1, 2) and at least one conical rotor (3) placed rotatably between the stators. The extruder further comprises supply conduits (6, 7) for feeding the material to be extruded separately into the exterior and interior of the rotor (3). Each supply conduit (6, 7) is provided with a separately adjustable feeding device (9, 10) by means of which the amount of the material flow to be supplied can be adjusted. In such a case, the degree to which the space between the rotor (3) and the stator (1, 2) is filled and the amount of the heat generated by the friction can be regulated. Further, the ratio of the material flows in the different supply conduits (6, 7) determines the ratio of the thicknesses of the layers obtained. Therefore, the method and apparatus according to the invention make it possible to regulate the properties of the final product easily and in several different ways.

L'invention porte sur un procédé de production d'un produit à extruder ainsi que sur une extrudeuse. Cette dernière comporte au moins deux stators coniques (1, 2) et au moins un rotor conique (3) monté de manière à pouvoir entrer en rotation entre les stators. Cette extrudeuse comporte, en outre, des conduits d'alimentation (6, 7) destinés à amener séparément le matériau à extruder à l'extérieur et à l'intérieur du rotor (3). Chaque conduit d'alimentation (6, 7) est pourvu d'un dispositif d'alimentation (9, 10) se réglant séparément, ce qui permet d'adapter l'importance du flux de matériau d'approvisionnement. Il est alors possible d'agir sur le niveau de remplissage de l'espace existant entre le rotor (3) et le stator (1, 2) ainsi que sur la chaleur produite par le frottement. De surcroît, le rapport existant entre les flux de matériau dans les différents conduits d'alimentation (6, 7) détermine le rapport des épaisseurs des couches obtenues. Le procédé et l'appareil selon cette invention permettent donc d'adapter les caractéristiques du produit final et ce, facilement et de plusieurs façons.

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