HEAD OF EXTRUSION OF A COMPLEX PROFILE COMPRISING A GUM OF EDGE IN FOUND OF SILLON

摘要

Extrusion head (2) of a complex section consisting of the assembly of several sections formed from separate rubber mixtures, intended to be mounted on a coextrusion machine (1) in which the profiles progress in a hollow cavity. extrusion in an extrusion direction from upstream to downstream, said head comprising a bottom wall (20) partially delimiting said extrusion cavity and a downstream extrusion block (3) having a profiling blade downstream (42) disposed in a transverse direction to determine a transverse profile of the complex section formed by the assembly of all the sections, said downstream profiling plate (42) comprising at least one projection (421) intended to form a groove longitudinal in the complex section. Said extrusion head (2) comprises at least one extrusion channel (71) placed at the outlet of an extruder annex (70), opening into an upstream portion of the projection (421), said extrusion channel annex (71) having a lower outlet opening (73) and at least one side outlet opening (72), respectively open at the edge of a bottom wall (421) of said projection (420) and at least one side wall (422) of said projection (420).