Method for manufacturing an acoustic panel with oblique cavities

A method for manufacturing an acoustic panel, comprising:

• a step of arranging, on a mold, one or more first layers of a material comprising a resin, so as to form a first skin of the panel,
• a first step of heating the first layers so as to polymerize the resin, and pressurizing the first layers with gas,
• a step of arranging, on the first skin, an adhesive material,
• a step of arranging, on the adhesive material, an intermediate structure comprising cavities which each open out on a first surface of the intermediate structure and on a second surface of the intermediate structure, the cavities being oblique with respect to the first and second surfaces, such that the adhesive material is enclosed between the first skin and the first surface of the intermediate structure,
• a second step of heating an assembly formed by the first skin, the adhesive material, and the intermediate structure, so as to polymerize the adhesive material
• a step of arranging, on the second surface of the intermediate structure, one or more second layers of a material comprising a resin, so as to form a second skin of the panel, and
• a third step of heating an assembly formed by the first skin, the intermediate structure, and the second skin, so as to polymerize the resin of the second layers, and pressurizing the assembly with gas, a maximum pressure applied during the third heating step being lower than a maximum pressure applied during the first heating step.