Device for manufacturing a composite yarn

D - Textiles – Paper – 02 – J

Patent

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Details

D02J 1/22 (2006.01) G01N 33/36 (2006.01)

Patent

CA 2231339

The invention discloses a device for manufacturing a composite yarn formed by the association of continuous glass filaments with continuous filaments of an organic thermoplastic material comprising at least a yarn feeder, supplied with glass, with on its internal surface a multiplicity of orifices from which are stretched a multiplicity of glass filaments, associated with a coating device, and at least a spinning head supplied with molten organic thermoplastic material, with on its internal surface a multiplicity of orifices from which are stretched a multiplicity of organic filaments. The said head is associated with a stretching device comprising at least two cylinders and a venturi device projecting the organic filaments into the lap formed by the glass filaments, means, common to the yarn feeder and to the spinning head, for assembling and stretching the composite yarn, for instance by a winding device such as a winder equipped with spindles, in which an optical device for sensing the thermoplastic filament lap reeling off in a defined zone is set between the cylinder stretching device and the venturi device, the said optical device being coupled with a circuit controlling the rotational speed of at least one of the cylinders.

L'invention a pour objet un dispositif pour la fabrication d'un fil composite formé par l'association de filaments continus de verre et de filaments continus de matière organique thermoplastique comprenant d'une part au moins une filière, alimentée en verre, dont la face inférieure est munie d'une multiplicité d'orifices à partir desquels sont étirés une multiplicité de filaments de verre, associée à un dispositif enducteur d'autre part au moins une tête de filage alimentée en matière organique thermoplastique fondue, dont la face inférieure est munie d'une multiplicité d'orifices à partir desquels sont étirés une multiplicité de filaments organiques, ladite tête étant associée à un dispositif d'étirage comprenant au moins deux tambours et à un dispositif venturi projetant les filaments organiques dans la nappe formée par les filaments de verre, et des moyens, communs à la filière et à la tête de filage, permettant l'assemblage et l'étirage du fil composite, par exemple par un dispositif de bobinage tel qu'un bobinoir muni de broches, dans lequel un dispositif optique de détection de la nappe de filaments thermoplastiques défilant dans une zone déterminée est disposé entre le dispositif d'étirage à tambour et le dispositif venturi, ledit dispositif optique étant relié à un circuit commandant la vitesse de rotation dont au moins un des tambours.

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