Apparatus and method for forming materials

D - Textiles – Paper – 01 – D

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Details

D01D 5/06 (2006.01) D01D 4/02 (2006.01) D01D 5/34 (2006.01)

Patent

CA 2505864

The invention is an extrusion apparatus and a method for extruding fibres. The extrusion apparatus has a first tubular passage (17) through which a core material (25) is extrudable. The tubular passage (17) has a first exit opening (13). In operation, the core material (25) is drawn down at a first distance at least 0.5 mm from the outer exit opening (13) within the first tubular passage (17). In another embodiment of the invention, the extrusion apparatus is provided with a second tubular passage (50) through which a coating material (27) is extrudable. The second tubular passage is disposed about the first tubular passage (17) and has an inner opening (52). The inner opening (52) is within the second tubular passage (50) and, in operation, coating material (27) is drawn down within the second tubular passage (50).

L'invention a trait à un appareil d'extrusion et à un procédé d'extrusion de fibres. Ledit appareil d'extrusion possède un premier passage tubulaire (17), à travers lequel un matériau noyau (25) peut être extrudé. Ledit passage tubulaire (17) comporte une première ouverture de sortie (13). En cours de fonctionnement, le matériau noyau (25) est étiré à l'intérieur du premier passage tubulaire (17), à une première distance, d'au moins 0,5 mm, de l'ouverture de sortie extérieure (13). Dans un autre mode de réalisation, l'appareil d'extrusion comprend un second passage tubulaire (50), à travers lequel un matériau de revêtement (27) peut être extrudé. Le second passage tubulaire est disposé à proximité du premier passage tubulaire (17), et comporte une ouverture intérieure (52). Ladite ouverture intérieure (52) est située à l'intérieur du second passage tubulaire (50) et, en cours de fonctionnement, le matériau de revêtement (27) est étiré à l'intérieur du second passage tubulaire (50).

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