SJZ series conical twin screw extruder is a highly efficient agglomerating and extruding equipment. Machines of this series feature low shearingn rate, uneasy degradation and agglomeration, reliable qulity, wide application range and long seriving life. Using PVC power as raw material for a direct forming, the extruders peform an excellent effectiveness. These machines have automatic temperature control, vacuum gas exhaustion, oiloooled  screws stepless speed regulation, as well as a forced feeding and self-cleaning mechanism.