Method and a device for manufacturing a part starting from a cushion made of deformable material, in particular for an edge of an element of an aircraft

A method for manufacturing at least one part made of deformable material for an edge of an element, the method comprising:

• a preparation step comprising creating a cushion comprising two plates arranged against one another to create an internal space and comprising at least one opening that allows access to the internal space;
• a molding step comprising:
• positioning the cushion at least partially in a mold, the mold comprising at least two shells, at least one of the at least two shells defining an imprint corresponding to a shape of the part that is to be manufactured and at least one auxiliary space formed between the imprint and a face of the at least one of the at least two shells, the at least one auxiliary space configured to receive a portion of material of the cushion, wherein the portion of material of the cushion in the at least one auxiliary space comprises a region of increased thickness relative to other portions of the cushion;
• closing the mold by joining the shells to one another;
• and
• injecting a pressurized fluid into the internal space of the cushion through the opening to deform the cushion to match the imprint of the mold and form a rough part that has a shape of the part that is to be manufactured, wherein the portion of material of the cushion in the at least one auxiliary space extends toward the imprint as the cushion deforms;
• and
• a finishing step comprising demolding the rough part and carrying out finishing operations on the rough part to obtain the manufactured part.