Abstract: A fibre application head for producing composite material parts, comprising a compacting system comprising a compacting roller for applying one or more fibres onto an application surface, and a heating system capable of emitting thermal radiation towards the fibre or fibres. The head further comprises a blowing system comprising an air blowing nozzle, the nozzle being arranged upstream from the roller, with respect to the movement direction, and being capable of forming an air knife, parallel to the axis of the roller, towards the nip zone between the compacting roller and the layup surface.

Abstract: A fiber application head for producing composite material parts, comprising a compacting system comprising a compacting roller comprising a rigid central tube and at least one cylindrical part made of a flexible material and assembled on said central tube, and an anti-adherent sheath covering the cylindrical part, and a heating system that is able to emit thermal radiation in the direction of the (s). The anti-adherent sheath has lateral portions extending beyond the cylindrical surface of the cylindrical part in the direction of the rotation axis of the roller, the assembly of the anti-adherent sheath to said cylindrical part being carried out by the lateral portions.

Abstract: A method for producing preforms, by layup of fibers on a layup surface, comprising the application of a binder on at least one continuous flat dry fiber, comprising two opposite main faces, and the layup of the fiber provided with binder by means of a layup head in order to form a preform. The application of binder on a fiber is carried out by means of at least one fiberizing nozzle comprising a discharge orifice supplied with liquid or pasty binder, and one or several injection orifices supplied with pressurized gas, in such a way that said nozzle is able to deliver the binder in the form of a spiral filament, the spirals of filament being deposited on a first main face of the fiber running underneath the nozzle in order to obtain a fiber provided with filaments of binder.

Abstract: The present application relates, in particular, a fibre application head for producing composite material parts, comprising a compacting system comprising a compacting roller (2) for applying one or more fibres onto an application surface, and a heating system (9) capable of emitting thermal radiation towards the fibre or fibres. Said head further comprises a blowing system (8) comprising an air blowing nozzle (81), said nozzle being arranged upstream from the roller, with respect to the movement direction, and being capable of forming an air knife, parallel to the axis of the roller, towards the nip zone between the compacting roller and the layup surface.

Abstract: The present application relates notably to a fibre application head for producing composite material parts, comprising a compacting system comprising a compacting roller (2) comprising a rigid central tube (4) and at least one cylindrical part (3) made of a flexible material and assembled on said central tube, and an anti-adherent sheath (6) covering the cylindrical part, and a heating system (9) that is able to emit thermal radiation in the direction of the fibre(s). Said anti-adherent sheath has lateral portions (61) extending beyond the cylindrical surface (33) of the cylindrical part in the direction of the rotation axis of the roller, the assembly of said anti-adherent sheath to said cylindrical part being carried out by said lateral portions.

Abstract: A method for producing preforms, by layup of fibers on a layup surface, comprising the application of a binder on at least one continuous flat dry fiber, comprising two opposite main faces, and the layup of the fiber provided with binder by means of a layup head in order to form a preform. The application of binder on a fiber is carried out by means of at least one fiberizing nozzle comprising a discharge orifice supplied with liquid or pasty binder, and one or several injection orifices supplied with pressurized gas, in such a way that said nozzle is able to deliver the binder in the form of a spiral filament, the spirals of filament being deposited on a first main face of the fiber running underneath the nozzle in order to obtain a fiber provided with filaments of binder.

Abstract: A fiber application head for a fiber application machine for the production of parts made of composite materials, comprising a compacting roller, said compacting roller comprising several independent roller segments mounted side by side on an axial rod. Each roller segment comprises a tubular central portion through which said segment is mounted on the axial rod, a tubular peripheral portion having a cylindrical outer surface and one or more curved spring plate arranged between the outer surface (31a) of the central portion and the inner surface of the peripheral portion.

Abstract: The present invention relates to a fiber application machine, for making components out of composite materials, comprising a fiber application head, fiber storing means, and means for conveying the fibers from said storage means to the application head. The conveying means comprises first flexible tubes, that receive one fiber into its internal passage. Each flexible tube is provided with at least one longitudinal flexible blade of rectangular cross section. Each first flexible tube and its associated flexible blade are placed in a second flexible tube so that the second flexible tube holds the flexible blade substantially against the first flexible tube, while allowing relative longitudinal movement of the flexible blade in relation to the first flexible tube.

Abstract: The present invention relates to a fiber application machine, for making components out of composite materials, comprising a fiber application head, fiber storing means, and means for conveying the fibers from said storage means to the application head. The conveying means comprises first flexible tubes, that receive one fiber into its internal passage. Each flexible tube is provided with at least one longitudinal flexible blade of rectangular cross section. Each first flexible tube and its associated flexible blade are placed in a second flexible tube so that the second flexible tube holds the flexible blade substantially against the first flexible tube, while allowing relative longitudinal movement of the flexible blade in relation to the first flexible tube.

Abstract: A fiber application head for a fiber application machine for the production of parts made of composite materials, comprising a compacting roller, said compacting roller comprising several independent roller segments mounted side by side on an axial rod. Each roller segment comprises a tubular central portion through which said segment is mounted on the axial rod, a tubular peripheral portion having a cylindrical outer surface and one or more curved spring plate arranged between the outer surface (31a) of the central portion and the inner surface of the peripheral portion.

Abstract: The present invention relates to a method of stripping an optical fiber, the method comprising the steps consisting in: locally and mechanically removing a portion of the outer covering of the fiber; placing a chemical solvent on the periphery of said zone of the fiber; and mechanically removing the covering(s) weakened in this way.