The main technical parameters of single screw extruder are as follows:

1. Screw diameter: refers to the outer diameter of the screw, expressed in D, in millimeters (mm).

2. Ratio of length to diameter of screw: It refers to the ratio of length L of working part of screw (the length of threaded part, that is, the length from the center line of feeding port to the end of thread) to diameter D of screw, expressed by L/D.

3. Screw speed range: refers to the highest speed of the screw to the lowest speed of the screw; use n to express the speed of the screw, the unit is revolution/minute (r/min).

4. Driving motor power of main screw: expressed by P, in kilowatt (kW).

5. Extruder barrel heating power: expressed in E, in kilowatt (kV).

6. Production capacity of extruder: expressed by Q, unit is kilogram/hour (kg/h).

7. Extruder center height: refers to the distance between the screw center line and the ground, expressed in H, in millimeters (mm).

8. Extruder shape size: refers to total length * total width * total height, expressed in L * W * H, in millimeters or meters m m or m)

9. Extruder quality: expressed in W, in kilograms or tons (kg or t)