Method for manufacturing a part made of composite material with permanent marking

By integrating airtight cavities as permanent markings within composite material parts through additive manufacturing, the issue of surface marking wear is addressed, ensuring reliable part identification and cost-effective maintenance.

FR3168543A1Pending Publication Date: 2026-05-22SAFRAN CERAMICS SA
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Patent Information

Application Number
FR2024012593
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-11-19
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Surface markings on composite material parts tend to wear off due to erosion, leading to loss of part identification during maintenance, necessitating replacement rather than repair.

Method used

Incorporate airtight cavities or pockets as permanent markings within the composite material part by producing an insertion element using additive manufacturing, which is integrated during the densification process, ensuring the marking remains intact under conditions of use.

Benefits of technology

The internal markings are resistant to erosion, allowing reliable part identification throughout the life of the part, including after repair, thus enabling cost-effective maintenance and reducing environmental impact.

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Abstract

A method for manufacturing a part made of composite material with permanent marking. A method for manufacturing a part made of composite material comprising: - the production of a fibrous preform (200) including an internal cavity (240) between a first and a second skin (204, 205), - the densification of the fibrous preform by a matrix so as to obtain a part made of composite material including a fibrous reinforcement densified by the matrix, characterized in that the method further comprises, before the densification of the fibrous preform: - the production of an insertion element (10) having at least one marking mark (12) formed by one or more internal cavities (121-128) in said insertion element, - the placement of the insertion element (10) in the internal cavity between the first and second skins (204, 205). Figure for the abstract: Fig. 4.
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Citation Information

Patent Citations

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