Abstract: A process for selectively lacing filaments on multi-dimensional textile preforms made of rods, the rods are displaced by the filament and pressed vertically downwardly by a needle with an open eye which, after passing through the piece to be laced, is opened at an insertion station for the filament to receive the filament, then is raised to pass the filament through the space freed by the rod.

Abstract: The invention relates to a process for selectively lacing filaments on multi-dimensional textile preforms made of rods, in which the rods are displaced by the filament, the rods being pressed vertically downwardly by a needle (3) of the type with an open eye which, after passing through the piece to be laced and ejection of the rod, is opened at a so-called insertion station (9) for the filament to receive the filament to be laced (21), then is raised to pass the filament through the space freed by said rod, characterized by the following steps:

Abstract: The object of the invention is a process for production of a carbon/carbon piece which is made from pieces cut out from a cloth of 2.5D, 3.5D or 4.5D and assembled to obtain a pre-form which is then densified with resin, gas or a mixture thereof.

Abstract: The present invention relates to a connecting rod made of composite material, especially for internal-combustion engines, the composite material being formed by a reinforcement embedded in a cured material, and the connecting rod (A) comprising, along the longitudinal extension (X—X) of the connecting rod, a central shank (B) extended respectively, at its two ends, by a connecting-rod big end (C) and a connecting-rod small end (D). According to the invention, the connecting rod (A) is produced entirely as a single component made of composite material and the reinforcement of the composite material comprises superposed plies of crossed straight filling yarns, the filling yarns, which extend parallel to the longitudinal extension (X—X) of the connecting rod (A), constituting at least twice the volume percentage of the filling yarns which extend in each of the directions other than the longitudinal extension (X—X) of the connecting rod (A), and binding yarns pass through the superposed plies.

Abstract: A method of making a connecting rod made of composite material, especially for internal-combustion engines, the composite material being formed by a reinforcement embedded in a cured material, and the connecting rod (A) comprising, along the longitudinal extension (X-X) of the connecting rod, a central shank (B) extended respectively, at its two ends, by a connecting-rod big end (C) and a connecting-rod small end (D). The connecting rod (A) is produced entirely as a single component made of composite material and the reinforcement of the composite material comprises superposed plies of crossed straight filling yarns, the filling yarns, which extend parallel to the longitudinal extension (X-X) of the connecting rod (A), constituting at least twice the volume percentage of the filling yarns which extend in each of the directions other than the longitudinal extension (X-X) of the connecting rod (A), and binding yarns which pass through the superposed plies.

Abstract: Weaving device for producing a woven structure which is intended for the production of a composite component, including especially a component (5) for generating different speeds of movement for at least some of the warp yarns (FC). Component (5) includes a substantially plane profiled cam (5) capable of rotating about a longitudinal axis (X--X) and arranged so that the longitudinal axis (X--X) is approximately orthogonal to the direction (D) defined by the warp yarns (FC). The profile of the cam is defined by a variable transverse length (h) perpendicular to the longitudinal axis (X--X).

Abstract: The present invention relates to a method and a machine for producing a reinforcement in the form of a block for a composite component formed by said reinforcement embedded in a cured matrix.According to the invention, said block (B) is made up by continuously forming a succession of superposed sheets, and the machine, comprising a stand provided with a subframe and with uprights for mounting at least one frame which can move along said uprights, capable of receiving a thread laying-down tool which can move in a plane transverse to said uprights, is noteworthy in that it comprises an additional frame (6) which can move along said uprights (4) and is provided with pegs (9) for hooking on said straight portions of thread (F).

Abstract: A method of stitching a piece of fabric by means of a thread made of technical fiber, for the purpose of making a composite fiber-matrix piece. According to the invention: the needle thread is constituted by a flexible thread that is strong in traction; the shuttle thread is constituted by the thread of technical fiber; and the tension of the shuttle thread and the tension of the needle thread are respectively adjusted to a level that is sufficiently low and a level that is sufficiently high to ensure that after the stitch has been made, the shuttle thread projects outside the piece of fabric from the first face side thereof, and the needle thread lies completely outside the piece of fabric, likewise on the first face side thereof.