Patent ID: 9481113
Filing Date: 2016-11-01
CPC Classification: B29C,B29K,B29L,D01D,D01F,Y10T

Claim Text:
1. A plant for making continuous elastic yarns made of silicone material, comprising at least an extrusion station, provided with an extrusion body into which said material is able to be introduced in an amorphous condition, and extrusion head able to allow said material to exit from said extrusion station along an extrusion axis, and a vulcanization station comprising a vulcanization oven, located downstream of said extrusion station, at a determinate distance therefrom, wherein: said extrusion head is disposed so that the extrusion axis is substantially vertical, said distance varies between 400 and 1500 mm according to the final thickness of the elastic yarn to be obtained; the plant also comprises a drawing unit, disposed downstream of said vulcanization station, and able to impart on the elastic yarn exiting from the extrusion station, a drawing value in a ratio comprised between 2 and 6 (100-500%), reducing the section of the elastic yarn proportionally, before the elastic yarn enters said vulcanization oven of the vulcanization station, and hence at least along said distance, and wherein the vulcanization oven is moveable to adjust said distance between said values 400-1500 mm to vary the drawing conditions of the elastic yarn and to obtain a final yarn with a thickness at least less than 0.7 mm, and having the desired orientation of the molecular chains.