Brief description of embodiments of a preform for comprising at least two sections object of the various thicknesses.

摘要

The present invention relates to a method of making a preform formed of layers of reinforcing fiber structure and comprising at least a portion of the wall (5, t) is formed of two sections having different thicknesses, consisting of a section (t), said first section, of greater thickness, consisting of a stack of layers and in a section (t), said second section, of lower thickness, consisting of a stack of layers with n & m. according to the invention, this process consists in carrying out the second section (t) by interrupting (m - n) layers of the first section (t) along a line of separation of said first and second sections, and to the sewing of the m layers of the first section (t) by at least one seam line (i1 - i3) formed along the line of separation of the said first section and of the second segment (t ).