(1) Adjusting the speed regulator screw can be fully compensated pressure fluctuations of an extruder.

(2) When the speed regulator screw unchanged, the remaining length of polymer melt can be regulated relying on the stabilized voltage screw, which has a good effect on voltage regulation,but only the largest fluctuations is 83163% in the value of regulation.

(3) With lower price, the device is acceptable to the majority of enterprises

(4) It is convenient to clean the screw of an extruder, due to simple structure of the regulator device.

(5) The device is connected to the vertical extruder head, unlike the pressure fluctuation controller, which requires a direction change of the head.