Screw conveyor

Continuous conveyor for bulk material which can preferably be used in sand preparation.

The core component of such a conveyor is a screw shaft rotating in a trough, container or closed pipe. Fig. 1 illustrates the operating principle of a screw conveyor in vertical design.

The screw conveys the additives, producing an intimate mixture at the same time. Ideally, it is emptied directly into the sand mixer. Figure 2 depicts a screw conveyor in vertical design. Here, the additives can be dosed by volumetric or gravimetric metering and monitored by means of a flow indicator.

Blockages in material flow can be prevented by a progressive inclination of the screw in the inlet section. Possible installation options for screw conveyors are shown in Fig. 3.



  • Fig. 1: Principle of a screw conveyor (schematic)
  • Fig. 2: Sample design of a screw conveyor (FAT Förder- und Anlagentechnik GmbH, Niederfischbach)
  • Fig. 3: Possible installation options for screw conveyors
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