Method for manufacturing, by means of an insert, a fibrous preform for reinforcing composite-material parts having a high local thickness variation

The method addresses fiber volume ratio deviations and cost issues in fibrous preforms by using fiber mat inserts in the fibrous texture, achieving controlled thickness variations and efficient gas infiltration for composite materials.

WO2026132710A1PCT designated stage Publication Date: 2026-06-25SAFRAN CERAMICS SA
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SAFRAN CERAMICS SA
Filing Date
2025-12-10
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Existing methods for manufacturing fibrous preforms with local thickness variations in composite materials face issues such as fiber volume ratio deviations, asymmetry, high manufacturing costs, and difficulties in gas infiltration, particularly in the production of turbomachinery components like aeronautical engine blades.

Method used

A method involving the creation of a fibrous texture with an internal housing for an insert element made of fiber mat, allowing for localized thickness increase while maintaining low fiber content, using weaving techniques and fiber mat plies from weaving scraps to reduce costs.

Benefits of technology

The method enables the production of fibrous preforms with controlled thickness variations, ensuring optimal gas infiltration and mechanical properties, while being economically viable and adaptable to complex geometries.

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Abstract

A method for manufacturing a fibrous preform for a composite-material part, the method comprising: - producing a fibrous texture by three-dimensional weaving, the fibrous texture comprising first and second parts, the first part comprising a delinking delimiting an internal housing (440), - producing an insertion element (10) comprising one or more plies (11, 12, 13, 14, 15) each consisting of a fiber mat, - arranging the insertion element (10) in the internal housing (440) so as to obtain a fibrous preform (600) comprising a first preform part (603) having, in a thickness direction (DE), a thickness (E603) greater than the thickness (E608) of a second preform part (608) adjacent to the first preform part (603)
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