(1) single screw extrusion machine mainly by the friction material conveying, the loading performance is restricted, powder, paste materials, glass fiber and mineral filler is more difficult to join.

(2) when the head pressure is higher, the current increases, the lower the output.

(3) single screw exhaust the material update in the vent area of the surface effect is small, so the exhaust effect is poorer.

(4) single screw extruder is not suitable for certain processes, such as polymer coloring, thermosetting powder processing.

If you need a special process and requirements can be reference for other type extruder: conical twin-screw extruder, parallel twin-screw extruder.