Compacting and injection mold for a fiber preform for fabricating a turbine engine guide vane made of composite material

A method of assembling a compacting and injection mold comprising a shell forming a trough that is to receive a fiber preform and that is closed by substantially plane bottom and top covers;

• compacting blocks arranged inside the trough each having a surface pressing normally against a surface of the fiber preform that is to be compacted;
• and closure blocks arranged inside the trough, each closure block having a surface pressing normally against a surface of a compacting block and not having a surface in contact with the fiber preform, the method comprising the following steps in succession:
• a) assembling the bottom cover in leaktight manner on the trough;
• b) positioning the fiber preform that is for use in fabricating a turbomachine part together with the compacting blocks inside the trough;
• c) positioning the closure blocks inside the trough;
• and
• d) assembling the top cover in leaktight manner on side walls of the trough.