and then packaged as a variant the operation of cutting out the shapes is carried out after impregnation squeezing and or hydroextraction and drying in the latter case the impregnated mat can be wound up in order to be transported to a cutting station as shown in fig3 each cut out shape a ring or plurality of sectors forming a ring is placed in a mould which has depending on the equipment for which the friction material is intended a bottom which is flat or in the form of a truncated cone or any other shape grooved or otherwise a metal support is placed in the mould on the ring or plurality of sectors forming a ring where appropriate a second ring or a plurality of sectors forming a ring is placed on the metal support opposite the said ring or the plurality of sectors forming a ring the mould is closed shims being disposed so as to control and limit the movement of a piston closing the mould heating under pressure is effected in the mould which moreover ensures the adhesion of the ring and where applicable of the second ring to the metal support the mould is opened and.