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.


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    Title :

    PROCÉDÉ DE RÉALISATION D'UN ÉCRAN DE PROTECTION ACOUSTIQUE POUR MOTEUR DE VÉHICULE AUTOMOBILE ET ÉCRAN OBTENU PAR UN TEL PROCÉDÉ


    Additional title:

    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


    Contributors:

    Publication date :

    2019-04-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    French


    Classification :

    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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