A method for producing an acoustic protection screen for a motor vehicle engine, comprising providing a reflective metal thermal protection sheet having a plurality of micro perforations, providing a batt of fibres containing a thermosetting resin, superposing the metal thermal protection sheet and the batt in a first thermocompression mould, compressing the batt by binding the fibres together, in order to form a thermal insulation layer, and combining the metal thermal protection sheet with the layer using the thermosetting resin, placing the thermal protection shell against an upper wall of a second mould, the wall being provided with out-gassing vents, the sheet facing toward the wall, injecting into the second mould an air-porous polyurethane foam precursor mixture, the lower wall of the second mould being free of any fluid-tight coating, after the foam has expanded, demoulding the screen obtained, in which screen the foam forms a support overmoulding the layer.
PROCÉDÉ DE RÉALISATION D'UN ÉCRAN DE PROTECTION ACOUSTIQUE POUR MOTEUR DE VÉHICULE AUTOMOBILE ET ÉCRAN OBTENU PAR UN TEL PROCÉDÉ
METHOD FOR PRODUCING AN ACOUSTIC PROTECTIVE SCREEN FOR A MOTOR VEHICLE ENGINE AND SCREEN OBTAINED BY SUCH A METHOD
VERFAHREN ZUR HERSTELLUNG EINER GERÄUSCHABSCHIRMUNG FÜR EINEN KRAFTFAHRZEUGMOTOR UND ABSCHIRMUNG ERHALTEN DURCH EIN SOLCHES VERFAHREN
2019-04-03
Patent
Electronic Resource
French
IPC: | B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
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