SJSZ series conical twin screw extruder is a highly efficient agglomerating and extruding equipment. Machines of this series feature low shearing rate, uneasy degradation, even plastictation and agglomeration, reliable quality, wide application range and long serving life. Using PVC powder as raw material for a direct forming. The extruders perform an excellent   effictiveness. These machines have automatic temperature control, vacuum gas exhaustion, oilcooled screws, stepless speed regulation, as well as a forced feeding and self-cleaning mechanism.