Turbomachine blade and method for the manufacture of same

Method of manufacturing a turbine engine blade comprising:

• a blade body of composite material having a fiber reinforcement densified by a die, the blade body extending in accordance with a longitudinal direction corresponding to the longitudinal direction of the blade;
• and an insert having a pi-shaped section, the insert having a part of the platform extending perpendicularly to the longitudinal direction, and two longitudinal flanges separated from each other by a space, the platform part comprising a housing delimited by a bottom wall and a rim, the bottom wall comprising an opening communicating with the bottom space between the two flanges, the method comprising:
• forming by three-dimensional weaving of a fiber preform intended to form the fiber reinforcement of the blade body of the blade, the preform having a longitudinal direction corresponding to the longitudinal direction of the blade to be produced and having, in this longitudinal direction, a first part extended by a second, end, part, the second part comprising two segments separated from each other from the junction between the first and the second part to a free end of the preform,
• inserting the fiber preform in the opening of the insert so that the first part of the preform is sandwiched between the flanges of the insert and that the segments of the second part protrude from the bottom wall of the housing,
• folding of each segment of the second part of the fiber preform on either side of the first part to fold against the bottom wall of the housing in order to obtain a blade blank,
• placing of the blade blank in the cavity of a mold having the shape of the blade to be produced,
• injecting a resin into the cavity of the mold in which the blade blank is present in order to impregnate the blank with resin, and
• heat treating the impregnated blank in order to transform the resin and obtain the blade.