Procedure for producing an acoustically resistive layer, the...

B - Operations – Transporting – 32 – B

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B32B 3/12 (2006.01) B29C 70/30 (2006.01) B64C 7/02 (2006.01) B64D 29/00 (2006.01) F16S 1/10 (2006.01) G10K 11/168 (2006.01)

Patent

CA 2329832

The object of the invention is a process for producing an acoustically resistive layer, particularly for the nacelles of aircraft jet engines, characterized in that it comprises the following steps: - producing a structural component (14, 16) by using thermoplastic resins, this component having a given quantity of open surface relative to the acoustic waves to be treated, - connecting an acoustic metallic fabric (12) whose mesh is adapted to the open surface quantity of the structural component, and - carrying out polymerization of the thermoplastic resins under pressure and at high temperature. The invention also covers the resistive layer obtained and a soundproof wall using such a layer.

- L'objet de l'invention est un procédé de réalisation d'une couche acoustiquement résistive, notamment pour des nacelles de réacteurs d'aéronefs, caractérisé en ce qu'il comprend les étapes suivantes : - réaliser une composante (14, 16) structurale en utilisant des résines thermoplastiques, cette composante présentant un taux de surface ouverte donné en rapport avec les ondes acoustiques à traiter , - rapporter un tissu (12) acoustique métallique dont la maille est adaptée au taux de surface ouverte de la composante structurale, et - assurer la polymérisation des résines thermoplastiques sous pression et à haute température. L'invention couvre aussi la couche résistive obtenue et une paroi d'insonorisation utilisant une telle couche.

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