Plant and method for making continuous elastic yarns made of silicone material and continuous elastic yarn made of silicone material thus obtained

A method for making continuous elastic yarns of silicone material, comprising at least an extrusion step, wherein by means of an extrusion station comprising an extrusion body said material is made to exit along an extrusion axis, with a conditioned shaping, and at least a vulcanization station step carried out in a vulcanization oven disposed downstream of said extrusion body, wherein:

• in said extrusion step, said extrusion means confer on the extrusion axis a substantially vertical direction,
• in a segment between an exit from the extrusion body and an entrance into the vulcanization oven, that is variable between 400 and 1500 mm according to the final thickness of the elastic yarn to be obtained, the elastic yarn is subjected to a drawing action performed by a drawing unit disposed downstream of said vulcanization oven, in which a drawing ratio conferred on the elastic yarn before entering the vulcanization oven is comprised in a value between 2 and 6 (100-500%), reducing the section of the elastic yarn proportionally, before the elastic yarn enters said vulcanization oven, and in which the elastic yarn has a final thickness of less than 0.7 mm and has a desired orientation of the molecular chains, and wherein the vulcanization oven is selectively moved with respect to said extrusion station so as to vary said distance at least according to a desired value of final thickness to be conferred on the elastic yarn.