First, What kind of processing row materials , single type or a mixed type. If you need a better mixing effect, choose twin screws. If the requirements are not high, a single screw can meet the requirements.
Secondly, the raw material is crystalline or amorphous. Choose the gradient type or mutant type screw.
The compression ratio is selected according to different materials.
If you do not know how to choose suitable screw and barrel for your extruder, please contact us .