Process for the production of an acoustively resistive layer, resistive layer thus obtained, and wall using such layer
AssigneeEads Airbus SA
InventorsRobert Andre, Alain Porte, Eric Rambaud
Life of this patent
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Abstract
A process for producing an acoustically resistive layer, particularly for the nacelles of aircraft jet engines. The process includes producing a structural component by using thermoplastic resins, this component having a given quantity of open surface relative to the acoustic waves to be treated. The structural component is connected to an acoustic metallic fabric having a mesh adapted to the open surface quantity of the structural component. Then, the thermoplastic resin is heated under pressure at high temperature.
Claims20
A process for the production of an acoustically resistive layer, comprising the steps of:
- forming a structural component from a thermoplastic resin, said structural component having a first open surface quantity,
- connecting said structural component to an acoustic metallic fabric having a mesh of a second open surface quantity,
- pressing said structural component and said acoustic metallic fabric together at a temperature having a temperature increase curve profile to diffuse said thermoplastic resin onto said metallic fabric, and
- adjusting a viscosity of said thermoplastic resin during said pressing step to prevent the thermoplastic resin from plugging the mesh.
A process for the production of an acoustically resistive layer, comprising the steps of:
- impregnating a plurality of filaments with a thermoplastic resin;
- laying said filaments spaced apart from each other to form a structural component having a first open surface quantity,
- connecting said structural component to an acoustic metallic fabric having a mesh of a second open surface quantity,
- pressing said structural component and said acoustic metallic fabric together at a temperature having a temperature increase curve profile to diffuse said thermoplastic resin onto said metallic fabric, and
- adjusting a viscosity of said thermoplastic resin during said pressing step to prevent the thermoplastic resin from plugging the mesh.
A process for the production of an acoustically resistive layer, comprising the steps of:
- perforating a sheet of thermoplastic resin with micro-perforations having a first open surface quantity to form a structural component;
- connecting said structural component to an acoustic metallic fabric having a mesh of a second open surface quantity,
- pressing said structural component and said acoustic metallic fabric together at a temperature having a temperature increase curve profile to diffuse said thermoplastic resin onto said metallic fabric, and
- adjusting a viscosity of said thermoplastic resin during said pressing step to prevent the thermoplastic resin from plugging the mesh.
Dependencies are inferred from the claim text.