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What Is The Type Of Screw In The Twin Screw

There are many types of screw in the twin-screw type. In the classification of the twin-screw extruder, there are screw in the direction of rotation and a combination of screw in the group. According to the spiral part of the screw, Modular and integral screw; according to the outer diameter of the screw, can be divided into cylindrical twin-screw and conical twin-screw and so on.

⑴ according to the screw part of the screw is divided into integral screw and modular screw.

① integral screw: the overall screw can be divided into the same part of the outer diameter of the cylindrical screw diameter and cylindrical diameter gradually reduced conical screw. Cylindrical screw is divided into the screw pitch from the feeding section to the homogenization section gradually change the screw and thread distance from the same, and the thread width from the feeding section to the homogenization section gradually increase the widening screw.

② modular screw: modular screw refers to the screw part of the screw by a number of different forms of the combination of threaded units. The threaded units are mounted on a shaft with a long key or assembled on a hexagonal mandrel to become a dedicated screw for extruding a plastic. Engagement type co-rotating twin-screw structure of the use of modular screw.

⑵ by two screw axis line parallel to the axis line parallel to the cylindrical screw and the axis line is not parallel to the cone screw. Twin screw is divided into two screw diameter the same, after the assembly of the two screws parallel to the axis of the cylindrical screw and two screw diameter from large to small gradually changed after the assembly of the two screw axis line is not parallel to the conical Screw.