1. Diameter: The diameter of the parallel twin screw is the same, the diameter of the small end of the conical twin screw is different from the diameter of the big end.
2. Concentric distance: The center distance of the flat twin screw is the same, the two sections of the conical twin screw are at an angle, and the size of the center distance changes in the axial direction.
3. L / D ratio: Parallel twin screw (L / D) refers to the ratio of the effective part length of the screw to the screw's outer circle, and conical twin screw (L / D) refers to the effective part length of the screw with the large end diameter and small The ratio of the uniform values of the end diameters.
From the above, it is clear that the most obvious difference between parallel and conical twin-screw extruders that can be ground is the different geometry of the screw barrel, which causes many differences in structure and performance. Although different, but Each has its advantages.