The cooling system used in the screw is oil cooling, the cooling system used in the barrel is air-cooled, and all the screws are machined with high precision special CNC screw milling machine to ensure the same height of each similar extrusion equipment. Drawing on the current advanced design concept, the design concept of variable pitch, variable clearance and fine fluid mechanics calculation is adopted to make the material cut, kneaded and compacted more compactly and closer to the actual production need.