How to choose a gearbox for a screw extruder?


When choosing a Gearbox for a Screw Extruder, you need […]

When choosing a Gearbox for a Screw Extruder, you need to take the material's weight into account as well as its type, feed rate and geometry. In order to accommodate this load, there are two types of bearings: radial and thrust. Thrust bearings are generally mounted on the output shaft of the gearbox, while radial bearings are located in the screw.

Embedded with excellent heat dissipation and oil lubrication systems, the gearboxes have stable output capacity even under heavy loading force. In addition to being highly efficient, they are compact and noise-free. Furthermore, they are equipped with a pressure flange to absorb axial loading from the extruder.

In addition, the Twin Screw Extruder is equipped with a special nitride steel screw, which has a four-dimensional length of 104mm. The screw has different segments, which can be customized to suit the application. A high torque gearbox is also provided to provide the required speed. The gearbox is lubricated and contains a heat exchanger to keep the gear oil cool.

The transmission is used to drive the twin-screw extruder's screw. The gearbox includes two parallel output shafts, the shorter one bearing the drive gear and the other bearing the gearwheels of the two distributor shafts. The intermediate shaft also has a gearwheel that engages the drive gear of the short output shaft.

Another benefit of twin-screw extruders is their positive displacement capability. This feature facilitates pumping of hard-to-feed materials. It also reduces the sensitivity of the flow rate to pressure, and allows for a more uniform residence time. Additionally, twin-screw extruders are suitable for processing a wide variety of materials.