| 摘要 |
<p>The present invention relates to a method for producing a one-piece preform for a composite structure, said preform being produced by means of a three-dimensional weaving method. The method is characterised in that it comprises the following steps which involve: - positioning a plurality of bundles of warp threads (13) distributed over the at least two pairs of harnesses; -alternately and as desired making: - movements of low amplitude of each of the pairs of harnesses so as to make at least two adjacent and separate layers (17, 19); - movements of higher amplitude of the pairs of harnesses so as to at least partially link the at least two adjacent layers (17, 19) on an least one portion (23) of the preform.</p> |
