Abstract: The invention relates to a method of making a composite panel (100) of sandwich structure and provided with a hinge (106), said panel comprising a stack made up of at least one first skin (101) made of a reinforced thermoplastics material, of a cellular core (102) made of a thermoplastics material, and of a second skin (103) made of a thermoplastics material, in which method said panel (100) is formed by pressing said stack at a pressure lying in the range 10×105 Pa to 30×105 Pa, the first and second skins (101, 103) being preheated to a softening temperature. The invention is characterized in that, after said panel has been formed, an incision is made at a determined place in said panel so as to cut through one (101) of the first and second skins (101, 103), and substantially through the entire thickness of the cellular core, while leaving the other skin (103) intact so that it forms, at said place, the hinge (106) between two portions (107, 108) of the incised panel (100).

Abstract: The invention relates to a method of making a reinforced composite panel of the sandwich type having a cellular core.

Abstract: The molded composition stack part (44 ) for a vehicle includes a stack including a cellular core sandwiched between a first face (46) and a second face (48). The part also has a curved surface zone (50) contiguous with the first face (48) and with a rim (54) of the part, and has a trough (52) extending in the second face (48) in the vicinity of the rim towards the first face. The part is characterized in that the rim (54) has a plane external side face (57) that is perpendicular to the first face (46), and that extends in alignment with the curved surface zone (50).