US 6,371,242 B1Granted

Noise attenuation panel

AssigneeShort Brothers PLC

InventorsRobert Samuel Wilson, Richard Parkes, Mark Braniff

Life of this patent

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Abstract

In the manufacture of a noise attenuation panel for an aeroengine nacelle an adhesive film is applied to a front face of a cellular component of the panel. The adhesive film is caused to reticulate to the ends of the walls of the cells at the front face of the cellular component. A perforate facing component of the panel is bonded to the front face of the cellular component by adhesive flow from the cell walls to the facing component. To avoid unpredictable adhesive flow giving rise to cosmetic spots on the front face of the facing component the two components are brought together with the interposition of an adhesive flow control sheet and the reticulated adhesive caused to bond the two components together by adhesive flow under the control of the adhesive flow control sheet.

Claims13

Dependent claims

A method of manufacturing a noise attenuation panel having:

a cellular component part which has a front face, a rear face and wall portions which extend from the front face to the rear face and which provide bounding surfaces for a multiplicity of cells which extend from the front face to the rear face, and
a facing component part which:
has a front face and a rear face,
extends across the ends of the cells of the cellular component part at the front face thereof with the rear face of the facing component part adjacent the front face of the cellular component part,
is formed with a multiplicity of apertures which provide gaseous fluid communication between the cells of the cellular component part and the front face of the facing component part for the attenuation of noise generated by gaseous fluid flow over the surface of the front face of the facing component part,
the method comprising:
bonding the facing component part to the cellular component part by the steps of:
applying an adhesive film to the front face of the cellular component part
causing the film to reticulate to the ends of the walls of the cells at the front face of the cellular component part,
introducing an adhesive flow control sheet between the front face of the cellular component part and the rear face of the facing component part,
bringing the two component parts together, with the interposition of the adhesive flow control sheet, and
causing the reticulated adhesive on the ends of the wall portions of the cells of the cellular component part to bond the two component parts together with adhesive flow to the facing component part under the control of the adhesive flow control sheet.

9 more elements

A noise attentuation panel comprising

a cellular component part including a front face, a rear face and wall portions defining a multiplicity of cells extending from the front face to the rear face, the wall portions providing bounding surfaces on the front face;
a facing component part including a front face, a rear face and a multiplicity of apertures providing gaseous fluid communication between the cells of the cellular component part and the front face of the facing component part for the attenuation of noise generated by gaseous fluid flow over the surface of the front face of the facing component part, the facing component part extending across the ends of cells of the cellular component part of the front face thereof with the rear face of the facing component part adjacent the front face of the cellular component part;
a bond between the cellular component part and the facing component part including adhesive and an adhesive flow control sheet, the bond being formed by applying the adhesive as a film to the front face of the cellular component part, causing the film to reticulate to the ends of the wall portions of the cells at the front face of the cellular component part, introducing the adhesive flow control sheet between the front face of the cellular component part and the rear face of the facing component part, bringing the two component parts together, with the interposition of the adhesive flow control sheet, and causing the reticulated adhesive on the ends of the wall portions of the cells of the cellular component part to bond the two component parts together with adhesive flow to the facing component part under the control of the adhesive flow control sheet. between the front face of the cellular component part and the rear face of the facing component part, bringing the two component parts together, with the interposition of the adhesive flow control sheet, and causing the reticulated adhesive on the ends of the wall portions of the cells of the cellular component part to bond the two component parts together with adhesive flow to the facing component part under the control of the adhesive flow control sheet.

Dependencies are inferred from the claim text.

Facts

Application: 09/550,827Filed 18 Apr 2000
Priority: GB 990958126 Apr 1999
Granted: 16 Apr 2002
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B32B 37/146
Characterised by the properties of the layers: whereby one or more of the layers is a honeycomb structure
B32B 3/12
Characterised by a discontinuous layer, i.e. formed of separate pieces of material: characterised by a layer of regularly- arranged cells, e.g. a…
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
F02C 7/045
Air intakes for gas-turbine plants or jet-propulsion plants: having provisions for noise suppression