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Extruder according to the mechanical industry standard JB/T8061-1996 standard (national standard), structure separation type (BM type), mixed section structure of 2 sections; The feed section is provided with a special forced feed groove, screw and screw (Zhoushan Zhejiang) are the key parts of the whole extrusion system, are made of fine alloy steel 38crmoala after strict heat treatment and fine processing. Surface nitriding treatment, nitriding treatment depth 0.6-0.7mm, brittleness is not more than 2 level, high strength, wear resistance, corrosion resistance, screw plasticizing effect is good; Temperature control system adopts ceramic heating ring heating and fan cooling, temperature sensor and temperature controller automatically control temperature; Reducer structure hard tooth surface special type, with oil pump forced lubrication system and forced cooling system, large torque, low noise, long service life.