Extrusion feed device for composite resin and composite...

B - Operations – Transporting – 29 – C

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B29C 47/04 (2006.01) B29B 11/10 (2006.01) B29C 43/34 (2006.01) B29C 49/02 (2006.01)

Patent

CA 2594130

An extrusion feed device for a composite resin capable of forming a composite resin extruded material having a variety of layer configurations not necessarily symmetrical. A plurality of cylindrical flow passages (3) and (4) for feeding a molten resin, an opening/closing valve (7) capable of opening/closing a center flow passage (36) and a cylindrical flow passage (4a), and a center opening/closing valve (39) capable of opening/closing the center flow passage are provided at the upstream side end part (2a) of a delivery passage (2) for delivering the composite resin extruded material. A main resin (30a) forming an outside layer is always fed from the cylindrical flow passage (3), and the other molten resin (30b) and/or (30c) as an auxiliary resin is fed, at a proper timing, from the cylindrical flow passage (4) and the center flow passage (36) on the inside into the molten resin (30a) on the outside by controlling the opening/closing valve (7) or the center opening/closing valve (39). Thus, the composite resin lumps in a variety of forms can be provided by involving, for example, multiple types of resins in the main resin layer in the state of being not involved in each other.

L~invention concerne un dispositif de chargement d~extrusion pour une résine composite, permettant de former une matière extrudée à base de résine composite présentant diverses structures en couches pas nécessairement symétriques. Selon l~invention, une pluralité de passages d~écoulement cylindriques (3) et (4) permettant de charger une résine fondue, un clapet d~ouverture/fermeture (7) permettant d~ouvrir/fermer un passage d~écoulement central (36) et un passage d~écoulement cylindrique (4a), et un clapet d~ouverture/fermeture central (39) permettant d~ouvrir/fermer le passage d~écoulement central sont montés au niveau de la partie d~extrémité amont (2a) d~un passage de refoulement (2) permettant de refouler la matière extrudée à base de résine composite. Une résine principale (30a) formant une couche extérieure est chargée en permanence à partir du passage d~écoulement cylindrique (3), et une autre résine fondue (30b) et/ou (30c) utilisée comme résine auxiliaire est chargée, conformément à un séquencement approprié et à partir du passage d~écoulement cylindrique (4) et du passage d~écoulement central (36), à l~intérieur de la résine fondue (30a) par commande du clapet d~ouverture/fermeture (7) ou du clapet d~ouverture/fermeture central (39). Il est donc possible de former des masses de résine composite de formes variables en utilisant, par exemple, plusieurs types de résines distincts dans la couche de résine principale.

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