US 10,239,227 B2Granted

Method of manufacturing a composite sandwich panel for an aircraft propulsion unit

AssigneeSafran Nacelles

InventorsPierre Caruel, Hervé Hurlin

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Abstract

The present disclosure provides a method of manufacturing a composite sandwich panel having a core formed of a plurality of cells extending vertically between a first skin and a second skin. The method includes creating at least one first strip and a second strip from a temporary material, each strip having at least one cavity having a succession of aligned half-cells, lining the cavity of the first strip with a fibrous ply, assembling the first strip and the second strip by interlocking the cavity of the first strip with the cavity of the second strip and trapping the fibrous ply therebetween, and trimming excess temporary material of the entirety of the strips formed during the preceding assembly step so as to form a new cavity which forms a succession of aligned half-cells.

Claims12

Dependent claims

A method for manufacturing a sandwich panel made of a ceramic-matrix composite-material, the sandwich panel including a core formed of a plurality of cells which extend vertically between a first skin and a second skin, the method comprising:

producing at least a first strip and a second strip made of a fugitive material, each strip having at least one cavity comprising a succession of aligned half-cells;
lining at least one fibrous ply on the at least one cavity of the first strip,
assembling the first strip and the second strip by interlocking the at least one cavity of the first strip with the at least one cavity of the second strip by trapping said fibrous ply;
trimming excess fugitive material of the first and second strips formed during the assembling step to form a new cavity which forms a succession of aligned half-cells;
and
repeating said producing, lining, assembling and trimming steps until the cellular core of the panel is formed.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/008,208Filed 14 Jun 2018 · continuation
Priority: FR 15 6230014 Dec 2015
Published: US 2018/0290330 A111 Oct 2018
Granted: 26 Mar 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification52 codes

B28B 1/002
Producing shaped prefabricated articles from the material: assembled from preformed elements
B28B 1/30
Producing shaped prefabricated articles from the material: by applying the material on to a core or other moulding surface to form a layer thereon
B28B 1/522
Specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement: for producing multi-layered articles
B28B 11/005
The shaping of preshaped articles, e.g. by bending: using heat to allow reshaping, e.g. to soften ceramic articles