How to improve production efficiency of parallel twin screw extruder

Improving production efficiency is one of the important objectives of the development and development of new parallel twin screw extruder. It can be realized by improving the rotation speed, plasticization and mixing capacity.

At the same screw speed, the depth of the spiral groove can greatly increase the throughput. Accordingly, the plasticization and mixing capacity of the screw are increased, which requires the screw to withstand greater torque. At high screw speed, the retention time of materials in the extruder is reduced, and it is possible that the melting and mixing of materials are not sufficient. Therefore, it is necessary to increase the length of the screw properly, which will inevitably lead to the increase of torque and power of the double screw extruder.

It is also an important factor to increase the free volume of the spiral groove. In charging period and the wave section, thread element with large free volume is very necessary, for materials bulk density, increase the charging period of free volume and material is in the spiral groove, can greatly improve the production ability of extruder.

To improve the torque and speed, the gearbox should be carefully designed. In order to improve the torque of the equipment, the design and manufacturing level of the transmission box will be higher. Output torque is higher, the transmission case of the gear, shaft, bearing and other parts of the design, manufacture precision, material strength, and the higher the heat treatment requirements, at the same time of screw spindle, screw elements and kneading disc parts design and manufacture of precision is also higher. Because to increase the free volume of screw elements on the basis of the screw diameter, the center distance of two screw will decrease, which will make the ratio of the gear and bearing installation space is not enough problems become more prominent.