INSTRUMENTATION FOR CO-EXTRUDING RUBBER MIXTURES

摘要

The invention concerns an instrumentation for co-extruding rubber mixtures comprising a main extruder (1) including an extrusion head (10) comprising at least two channels (14, 15) each circulating a rubber mixture (A, B), said channels emerging onto an extrusion orifice (18) through which are delivered the two rubber mixtures (A, B), the extrusion orifice (18) being delimited by first (111) and second (161) walls, which also comprises at least a micro-extruder (2) of a third rubber mixture (C) whereof the extrusion head (22) is provided at its end with a nozzle (23), said nozzle passing through the two circulation channels (14, 15) such that the third rubber mixture (C) is introduced in each rubber mixture (A, B) upstream of the extrusion orifice (18).