Procedure for preparation and molding of curved tubular elements of plastic materials reinforced with fibers. (Machine-translation by Google Translate, not legally binding)

摘要

Method of preparation and molding of curved tubular elements of fiber-reinforced plastic materials, according to which the working face of the mold or mandrel used for the manufacture of the tube is covered with a spiral coil of flexible strip, so that each overlapping spire on the preceding, in order to allow a slight lateral displacement without gaps; once the molding of the straight tube has been completed, and before hardening the liquid component resin, the ends of the winding are fixed and the mold or mandrel is removed, the tubular molding remaining supported by the flexible winding; this assembly is curved on a suitable mold and the resin is hardened, so that the curvature of the tube remains permanent; finally the support strap is discarded. (Machine-translation by Google Translate, not legally binding)