METHOD FOR PRODUCING AN INNER TRIM PANEL FOR A MOTOR VEHICLE

• Main Author: LEMAIRE, Dominique
• Format: Patent
• Language: English; French; German
• Published: 08.01.2020
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; 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; PERFORMING OPERATIONS; 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; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present application relates to a method comprising the following steps: producing an obverse stack (A) and a reverse stack (B), each comprising a reinforcement layer (2a, 2b) and a fibrous layer (3a, 3b), the outer faces of said reinforcement and porous layers being coated with a porous protective layer (41a, 42a, 41b, 42b), respectively; compressing each of said stacks, wherein the protective layer of the reinforcement layer in the obverse stack is either coated with an obverse coating layer (5a) or left uncoated such that it forms, by itself, the obverse coating layer, in order to obtain an obverse shell (8a) and a reverse shell (8b) defining, by an overlapping of their respective edges, a closed volume; disposing said shells opposite each other in a reaction injection mould and injecting into said volume a precursor mixture of rigid polyurethane foam to form a cellular core (6).