FIELD: processing of rubber and thermoplastic materials. SUBSTANCE: extruder comprises an entry zone, a pin zone for mixing and homogenization, and an additional delivery and mixing zone. The pin zone accommodates pins radially arranged in a casing. In said zone the crests of auger thread are interrupted. Preferable number of pin rows is up to 5. The auger in the additional zone has the depth of thread roots uniformly diminishing to zero with subsequent increase to a maximum. In the same zone the threads on the internal surface of the casing have the height of ridges uniformly increasing to a maximum and decreasing to zero. There may be a high pressure zone at the extruder outlet. The extruder zones have concrete specified lengths which depend on the auger diameter. EFFECT: extruder throughput is increased by 60-100% at a good quality of mixture. 5 cl, 1 dwg
