How to realize the high performance of the co-rotating twin-screw extruder

Increasing the production efficiency is one of the important goals in the development and research of the new co-rotating twin-screw extruder, which can be achieved by increasing the screw speed, improving the plasticizing and mixing capacity, etc.

Under the same screw speed, adding the depth of the screw groove can greatly increase the conveying capacity. Correspondingly, the plasticizing and mixing capacity of the screw is also increased, and the screw needs to bear a larger torque.

At high screw speed, the residence time of the material in the extruder is shortened, which may cause the material to be plasticized and melted, resulting in insufficient mixing. Therefore, it is necessary to properly increase the screw length, which will inevitably increase the actual bearing torque and power of the twin-screw extruder.

Increasing the free volume of the screw groove is also an important factor. In the feeding section and the devolatilization section, the threaded parts require a large free volume. For bulk density materials, the free volume of the feeding section and the filling degree of the material in the screw groove can greatly improve the production capacity of the extruder.

To increase torque and speed, the reduction distribution box must be carefully designed. Significantly improving the torque target of the equipment will definitely put forward higher requirements on the design and production level of the transmission case.

In order to increase the free volume of threaded parts, when the outer diameter of the thread remains unchanged, the center distance of the two threads becomes smaller, and the problem of lack of installation space for the matching gear and thrust bearing will become more prominent.