... most primary character of clam-shell barrel same-direction parallel twin screw extruder. Both screws and barrels were designed using the ... mixing/compounding, dispersing, homogenization, devolatiliation, pressure-buildup in twin screw extruders, in accordance to the specific requirements of each process ... no need for any special base.Clam shell barrel twin screw extruder family:PSHJ-20:21.7mm output:5- ...