Curing mold for manufacturing a turbomachine component made of composite material from a preform and method for producing a component by means of such a mold

Curing mold for manufacturing a turbomachine component from a composite material, starting from a preform made by laying up prepregs comprising reinforcing fibers impregnated in a thermosetting resin, the curing mold comprising:

• a first body and a second body designed to be fitted together, the first and second bodies each comprising an internal surface, the internal surface comprising a peripheral area at which the first and second bodies are in contact with each other and a central area defining a fixed air gap between the first and second bodies, the shape of the air gap being complementary to the turbomachine component to be manufactured and intended to accommodate the preform;
• a heating member designed to heat the preform in the air gap to a first temperature, so as to reduce the viscosity of the resin;
• at least one primary channel formed in the first and/or second body;
• an injection member designed to inject fluid under pressure into the primary channel(s);
• at least one secondary channel formed in the first and/or second body, the or each secondary channel receiving a piston installed free to slide inside said secondary channel along a sliding axis and delimiting, on the one hand, a first chamber in communication with the or a primary channel(s), and on the other hand, a second chamber in communication with the air gap, the piston of the or each secondary channel being also designed to compress resin that entered the second chamber of said secondary channel from the preform into the air gap, so as to put the preform under hydrostatic pressure when the preform is located in the air gap, when the heating member heats the preform to the first temperature and when the injection member injects fluid under pressure into the primary channel(s) to the first chamber of said secondary channel.