Plastic Extruder Transmission System

The function of the transmission system is to drive the screw and provide the torque and speed required by the screw during the extrusion process. It is usually composed of a motor, a reducer and bearings.
Under the premise of basically the same structure, the manufacturing cost of the reducer is roughly proportional to its size and weight. Because the size and weight of the reducer are large, it means that more materials are consumed during manufacturing, and the bearings used are also relatively large, which increases the manufacturing cost.
For extruders with the same screw diameter, high-speed and high-efficiency extruders consume more energy than conventional extruders. The motor power is doubled, and the reducer frame number must be increased accordingly. However, high screw speed means low reduction ratio. For reducers of the same size, the gear module of low reduction ratios is increased compared with large reduction ratios, and the reducer's ability to bear load is also increased. Therefore, the increase in the volume and weight of the reducer is not linearly proportional to the increase in motor power. If the extrusion volume is used as the denominator and divided by the weight of the reducer, the high-speed and high-efficiency extruder will have a smaller number, and the ordinary extruder will have a larger number.
In terms of unit output, the motor power of the high-speed and high-efficiency extruder is small and the reducer weight is small, which means that the unit output machine manufacturing cost of the high-speed and high-efficiency extruder is lower than that of the ordinary extruder.