Device for the manufacture of fibres by drawing by means of gas streams

摘要

At least one gas jet (5) is generated and is perturbed by means of a baffle (19) inserted in its path to establish counterrotating turbulences alongside a lamina flow region towards which a lace (G) of ductile substance is brought. The baffle member (19) comprises at least one component with a surface whose sections parallel to the axis of the orifice for emitting (32) the jet and to the lace (G) of ductile substance have a convex portion placed in the flow of the jet. The device also comprises a main gas stream generator (15) for forming with the jet an interaction zone where the substance is subjected to a second drawing stage. Means of support provided with control instruments make it possible to modify the relative positions and the interactions of the various instruments of the device with a view to compensating the various fluctuations of the fibre-forming conditions.