B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 70/50 (2006.01) B29B 15/12 (2006.01)
Patent
CA 2648316
Process for producing a stampable reinforced composite semi-finished product comprising one or more plastics and chopped fibres or continuous filaments (4), the softening temperature of which is above the highest of the softening temperatures of said materials, which process comprises the steps consisting in: depositing said fibres or filaments (4), especially by gravity, onto a conveyor (1); sprinkling particles (6) of a powder of said plastics onto said fibres or said filaments (4), in a proportion of between 5% and 90% of the total weight; blending said particles (6) with said fibres or said filaments (4); and heating the blend to a temperature above the softening temperatures of said materials, characterized in that the blending step includes subjecting said blend (4, 6) to at least one electric field approximately perpendicular to the direction of advance (15) of said conveyor (1).
Procédé pour la réalisation d'un semi-produit composite renforcé et estampable comprenant un ou plusieurs matériaux plastiques et des fibres coupées ou des filaments continus (4), dont la température de ramollissement est supérieure à la plus haute des températures de ramollissement desdits matériaux, comprenant les étapes consistant ; à déposer lesdites fibres ou lesdits filaments (4), notamment par gravité, sur un convoyeur (1) ; à saupoudrer des particules (6) d'une poudre desdits matériaux plastiques sur lesdites fibres ou lesdits filaments (4), dans une proportion comprise entre 5% et 90% du poids total ; à mélanger lesdites particules (6) avec lesdites fibres ou lesdits filaments (4) ; à porter le mélange à une température supérieure aux températures de ramollissement desdits matériaux; caractérisé en ce que l'étape de mélange inclut le fait de soumettre ledit mélange (4, 6) à au moins un champ électrique sensiblement perpendiculaire à la direction d'avance (15) dudit convoyeur (1).
Caramaro Laurence
Marduel Joric
Brouillette & Associes/partners
Fibroline France
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