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Difference Between The Parallel And Conical Twin Screws?

Jul 25, 2018

The Parallel and conical twin-screw extruders are conveyor machinery with forced advancement of plastics. They have good mixing and plasticizing capabilities and dewatering capabilities. They have basically the same adaptability to the molding process of materials and plastic products. . In addition to this they have many differences:

1. Diameter: The diameter of the parallel twin screw is the same, and the diameter of the small end of the cone 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 axes of the cone twin screw are at an angle, and the size of the center distance varies along the axis.

3. Length to diameter ratio: Parallel double screw (L/D) refers to the ratio of the effective part length of the screw to the outer circle of the screw. The conical twin screw (L/D) refers to the effective part length and the large end diameter and small of the screw. The ratio of the average of the end diameters.

From the above, it can be clearly seen that the parallel and conical twin-screw extruders, the most significant difference is that the geometry of the screw barrel is different, which leads to many differences in structure and performance, although the two characteristics are different. But have their own advantages.

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