Each extruder is equipped with a transmission device, which is used to connect the transmission output shaft and the main reducer input shaft that are not in the same straight line, and ensure that the included angle and distance between the two shafts can still transmit power stably and reliably under the condition of frequent changes. What is the transmission device of the screw plastic extruder?
The traditional device of an extruder is usually composed of a motor, a reducer, a bearing, etc. Its main function is to drive the screw and provide the screw with the torque and speed required in the extrusion process. The drive device is generally compact in structure, stable in operation, and strong in bearing strength.
The structure of the extruder is composed of a screw, a barrel, a heating and cooling system, a transmission device and a control device. In the extruder, the screw is an important component, which has the functions of transporting raw materials, tamping, melting, homogenizing, charging and pumping. The transmission device of the extruder is mainly used to provide energy for the screw, which can transfer and convert energy or change the energy operation mode.
The prime mover of the drive system of the extruder is mostly a format motor. The adjusting device can make the screw speed adjustable within a certain range. Some extruders design the adjusting device and the motor as a whole, while some extruders integrate the motor and the reducer as a whole. The reduction part of the transmission device is mostly a gearbox or cycloidal pin wheel reducer. Both have their own advantages. The gear reducer has small transmission loss, stable transmission and good durability, but its speed ratio is small. The cycloidal needle wheel has smaller volume and noise, higher speed ratio and higher efficiency.
Source: Weisu Communication
