B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/10 (2006.01) B29C 47/00 (2006.01)
Patent
CA 2316228
Process for the extrusion of polymers with a high percentage of inert materials; being meant with such an expression percentages from 35-40 % by weight to 70-80 % by weight on the total, including the stages of: feeding of precisely measured amounts of the components and the additives in axially distanced points of a screw mixer; intimate mixing of said components and their extrusion through the extrusion head of said mixer. Said process is carried out through a device including an extruder (1) for the transformation of a mixture consisting of at least one polymer, an inert material and one or more additives such as lubricants, stabilizers or else, means (2, 3, 4) (2, 3, 4) for the ensiling of each of said mixture components, devices (21, 31, 41) for the continuous weighing of each of said components and means (6, 8, 9) for the feeding of said components. Such feeding means (6, 8, 9) are positioned in prearranged points along the extruder (1) according to the composition of the mixture to be transformed.
Cette invention a trait à une méthode d'extrusion de polymères à fort pourcentage de matériaux inertes, en l'occurrence de 35-40 % à 70-80 %, en pourcentage pondéral, du poids total. La méthode consiste introduire dans un mélangeur à vis, à des endroits séparés axialement, des quantités précises de composants et de produits d'addition, à mélanger intimement ces composants et à procéder à leur extrusion par la tête d'extrusion du mélangeur. Cette méthode est mise en oeuvre à l'aide d'un appareil pourvu d'une extrudeuse (1) servant à la transformation d'un mélange contenant au moins un polymère, un matériau inerte et un ou plusieurs produits d'addition tels que des lubrifiants, des agents de stabilisation ou analogue, d'équipements (2, 3, 4) d'ensilage de chaque composant du mélange, de dispositifs (21, 31, 41) permettant de peser sans interruption chacun de ces composants et de dispositifs (6, 8, 9) d'amenée des ces composants. Les dispositifs d'amenée (6, 8, 9) sont placés à des endroits prédéterminés de l'extrudeuse et ce, en fonction de la composition du mélange à transformer.
Marks & Clerk
Tessa Trading Ltd.
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