A screw feeder generally controls the inlet of the screw conveyor system.
The main feature of these screw feeders is that the screw decreases in pitch along its length. By this means the material to be conveyed is compressed to form a tight seal in the barrel. These feeders used to be widely used in the cement industry, and for fly ash conveying in power stations. The material is fed from the supply hopper and is advanced through the barrel by the screw.
Since the screw pitch decreases towards the outlet, this compacts the material as it passes through the barrel. Being capable of continuous operation and having a high-pressure capability means that it is often used in closed-loop conveying systems when high operating pressure is required.
For high-pressure operation, the device is only suitable for materials that can be compressed. This generally restricts their use to materials that have very good air retention properties, such as cement and fly ash. Due to their very good air retention capability, their bulk density can be increased by up to 50 percent simply by utilizing vibration.
In conclusion, screw conveyor systems not only increases your operational efficiency but also output and provides good ROI.