Method for manufacturing a sound-absorbing sandwich panel for reducing noise of an aircraft engine
AssigneeLeonardo S.P.A.
InventorMarco VERCELLESI
Life of this patent
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Abstract
A method for manufacturing a sound-absorbing panel with a sandwich structure for reducing noise impact of an aeronautic engine includes providing a first skin of a thermoplastic polymeric material, making a plurality of micro-holes through the first skin by mechanical punching of the first skin, securing the first skin to a central layer by arranging a structural adhesive layer between the first skin and the central layer and/or by a thermal weld between the first skin and the central layer, and securing the central layer to a second skin by arranging a structural adhesive layer between the central layer and the second skin and/or by a thermal weld between the central layer and the second skin.
Claims17
A method for manufacturing a sound-absorbing panel with a sandwich structure for reducing noise impact of an aeronautic engine, the method comprising the following steps in sequence:
- a) providing a first skin of a thermoplastic polymeric material;
- b) making a plurality of micro-holes through the first skin by mechanical punching of the first skin;
- c) securing said first skin to a central layer by arranging a structural adhesive layer between the first skin and the central layer and/or by a thermal weld between the first skin and the central layer;
- and
- d) securing said central layer to a second skin by arranging a structural adhesive layer between the central layer and the second skin and/or by a thermal weld between the central layer and the second skin.
A sound-absorbing panel obtained by a method comprising the following steps in sequence:
- a) providing a first skin of a thermoplastic polymeric material;
- b) making a plurality of micro-holes through the first skin by mechanical punching of the first skin;
- c) securing said first skin to a central layer by arranging a structural adhesive layer between the first skin and the central layer and/or by a thermal weld between the first skin and the central layer;
- and
- d) securing said central layer to a second skin by arranging a structural adhesive layer between the central layer and the second skin and/or by a thermal weld between the central layer and the second skin.
Dependencies are inferred from the claim text.