GRANULATING SCREW EXTRUDER Russian patent published in 2003 - IPC

FIELD: processing of high-concentrated polydisperse materials with a high viscosity by the method of straightway molding, applicable in various branches of industry, for example, chemical, food and others. SUBSTANCE: the extruder includes a body, feeding screw and a multi-channel molder tool. The forming channels with contracting entering parts are made on the inner surface of the molder tool facing the mass flow. The contracting entering parts of the peripheral forming channels located in the recess of the multi-channel molder tool in the transient part between the inner surface of the body and the multi-channel molder tool make up a complex geometric surface. The above surface is obtained by combination of successively alternating surfaces: cylindrical, taper-cylindrical and tapered ones. EFFECT: prevented dead zones located in the periphery between the extruder body and the multichannel molder tool. 1 cl, 5 dwg