Improvement to an extrusion unit for the melt spinning (extrusion) of thermoplastic materials

摘要

An extrusion unit for the melt spinning (extrusion) of molten thermoplastic synthetic materials, especially for the manufacture of polypropylene filaments, comprises a melt chamber and extrusion heads. It is characterised in that the melt chamber 3 has a large surface area and a short length, in that heating means 4, 5 intended to melt the polymer 2 are located inside this chamber, in a single plane, and in that these heating means are prismatic bodies 4 made of metal, preferably steel, in which longitudinal resistive elements 5 are incorporated. IMAGE