Process for manufacturing a three-dimensional fibrous structure for the purpose of the subsequent production of a piece in a composite material and a machine for carrying it out

摘要

The manufacture of fibrous structures. The process is characterised in that it involves: - making the connection of the laps by the needling of the surface part or surface parts corresponding to the geometry of the preform to be obtained, - and cutting the preform in relation to the non-needled superposed lap parts by means of a machine comprising a plate 11 carrying a support 13 and a superposed needling head 14 associated with at least one member 16 for cutting the needled fibrous material. The invention is used for the manufacture of wearing linings.