Abstract: A toolage for manufacturing a tubular preform of fibers comprising a mold which has a deposition surface on which are superposed laps of fibers and a compacting device configured to cap the mold. The compacting device comprises first and second rings, at least one seal-tight flexible conduit linked to the first and second rings and at least one rigid link element linking the first and second rings. Such a compacting device makes it possible to greatly reduce the time for it to be installed, which makes it possible to reduce the duration of the compacting cycles.

Abstract: A toolage for manufacturing a tubular preform of fibers comprising a mold which has a deposition surface on which are superposed laps of fibers and a compacting device configured to cap the mold. The compacting device comprises first and second rings, at least one seal-tight flexible conduit linked to the first and second rings and at least one rigid link element linking the first and second rings. Such a compacting device makes it possible to greatly reduce the time for it to be installed, which makes it possible to reduce the duration of the compacting cycles.

Abstract: A mold including: a central core having a side wall with a plane external surface; an internal mold element having an internal surface facing the external surface of the central core, with surfaces inclined to the vertical in order to form an angle of clearance, and a substantially vertical external surface; an external mold element fitted against the internal mold element and having a substantially vertical internal surface facing the external surface of the internal mold element; at least one of the facing surfaces being designed to receive a substantially vertical lateral preform so that the internal mold element and the external mold element are suitable for clamping said lateral preform.

Abstract: A process for manufacturing a piece made of composite material including a fiber preform that is embedded in a matrix, includes placing the preform in a first chamber that is delimited by a first semi-sealed wall, i.e., permeable to gas and impermeable to a product that is able to form the matrix, extracting the gases in a second chamber that is delimited by a second gas-tight wall and the first semi-sealed wall so as to obtain the diffusion of the product that is able to form the matrix in the preform, characterized in that it consists in using—as a first semi-sealed wall—at least one plate with a number of pipes of tapered shape that empty on either side of the at least one plate and at least one semi-sealed membrane that is superposed on the at least one plate.

Abstract: A process for manufacturing a piece made of composite material with a hollow form and including a fiber preform (50) that is embedded in a matrix, includes placing the preform (50) in a first chamber (64) delimited by a mold (52) that is in contact with the surface of the piece to be produced outside of the hollow form and a counter-mold (54) that is in contact with the surface of the piece to be produced inside of the hollow form, and using a mold (52) that is made in at least two parts (52.1, 52.2) and elements (78) for controlling the spacing of the at least two parts (52.1, 52.2) that are contiguous using the expansion phenomenon during the polymerization phase.

Abstract: The manufacturing method includes a step of resin transfer moulding, wherein resin is injected (E) in a preform (1), which is placed in a closed mold (2) and said preform (1) is degassed during the whole resin injection operation of this step of resin transfer moulding.

Abstract: A process for manufacturing a piece made of composite material with a hollow form and including a fiber preform (50) that is embedded in a matrix, includes placing the preform (50) in a first chamber (64) delimited by a mold (52) that is in contact with the surface of the piece to be produced outside of the hollow form and a counter-mold (54) that is in contact with the surface of the piece to be produced inside of the hollow form, and using a mold (52) that is made in at least two parts (52.1, 52.2) and elements (78) for controlling the spacing of the at least two parts (52.1, 52.2) that are contiguous using the expansion phenomenon during the polymerization phase.

Abstract: A process for manufacturing a piece made of composite material including a fiber preform that is embedded in a matrix, includes placing the preform in a first chamber that is delimited by a first semi-sealed wall, i.e., permeable to gas and impermeable to a product that is able to form the matrix, extracting the gases in a second chamber that is delimited by a second gas-tight wall and the first semi-sealed wall so as to obtain the diffusion of the product that is able to form the matrix in the preform, characterized in that it consists in using—as a first semi-sealed wall—at least one plate with a number of pipes of tapered shape that empty on either side of the at least one plate and at least one semi-sealed membrane that is superposed on the at least one plate.

Abstract: A method for manufacturing a thin structural component made of composite and intended to withstand, on the one hand, working loads and, on the other hand, accidental loadings. The method involves creating a dry fiber preform of the component that is to be manufactured, and impregnating the aforementioned perform with a matrix-forming resin by resin transfer. The perform is created by assembling at least one structural layer, a first surface reinforcing layer on a first face of the aforementioned structural layer, and a second surface reinforcing layer on a second face of the structural layer. A number of plies in the two surface reinforcing layers is first of all calculated so that the finished component will be able to withstand the accidental loadings, then a number of plies in the structural layer is calculated, with due consideration given to increases in structural strength contributed by the surface reinforcing layers so that the finished component will be able to withstand the working loads.