Views:58 Author:Site Editor Publish Time: 2019-08-08 Origin:Site
Classification of twin-screw extruder
According to the direction of rotation of the twin-screw, the extruder can be divided into two extruders: the same direction and the opposite direction. The same direction extruder rotates in the same direction when the two screws work. The counter-rotating machine refers to two screws. The direction of rotation is opposite when working.
According to whether the axis of the twin-screw is parallel or not, it can be divided into two extruders in which the axial line is parallel and the axial line intersects. The axial line is parallel to the twin-screw extruder, and the axial line intersects the conical twin-screw extruder.
Twin-screw extruders also have a meshing and non-engaging component.
The parallelism is similar to that of a conical twin-screw extruder: there is a transfer mechanism for forced advancement of plastics, good mixing plasticizing ability and dewatering capacity, and basically the same adaptability to the molding process of materials and plastic products.
Parallel to the difference between a conical twin-screw extruder
1. Diameter: The diameter of the parallel twin screw is the same, and the diameter of the small end of the tapered twin screw is different from the diameter of the large end.
2. Concentric distance: The center distance of the flat twin screw is the same, the two axes of the conical 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.