METHOD AND LINE FOR MANUFACTURING A PANEL WITH MULTIPLE ACOUSTIC ELEMENTS FOR AN ACOUSTIC ATTENUATION STRUCTURE

• Main Authors: ALGLAVE, Hugues Laurent, DUNLEAVY, Patrick, LANFANT, Nicolas Pierre
• Format: Patent
• Language: English; French; German
• Published: 29.11.2023
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SOUND-PRODUCING DEVICES; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a method for continuously manufacturing a panel with multiple complex acoustic elements (120) for an accoustic attenuation structure (100), the method comprising supplying (400) a thermoplastic resin film at the inlet of a drawing system comprising at least one pair of complementary cylinders, heating (410) said thermoplastic resin film upstream of the inlet of the drawing system, and passing (420) said thermoplastic resin film between said at least one pair of complementary cylinders, said pair of complementary cylinders comprising a male cylinder having teeth projecting radially from the cylinder and a female cylinder having cavities on its radial surface, the cavities of the female cylinder having shapes that match the shapes of the teeth of the male cylinder, and separating the drawn film at the outlet of the drawing system by means of a separator arranged at the outlet of the drawing system between the drawn film and the female cylinder.