| 摘要 |
<p>The invention relates to a process for producing an elementary preform (P) formed from a stack of reinforcing layers of fibrous structure and having a surface delimited by at least one contour line. According to this process, a predetermined number of reinforcing layers of fibrous structure are stacked, and for each contour line, a first line of stitching (12), referred to as inner stitching, and a second line of stitching (13), referred to as outer stitching, are produced parallel to the contour line, which are suitable for delimiting homothetic surfaces of the surface delimited by said contour line, and having dimensions respectively substantially smaller and substantially greater than those of said surface, and the stack of reinforcing layers is cut along a cut line (D) parallel to the line of inner stitching (12) and line of outer stitching (13) and inserted between said lines of stitching.</p> |
