Extruder material delivery method

In single screw extruders, the material transfer is towed. Frictional drag in the solid conveying section and viscous drag in the melt conveying section. The frictional properties of the solid material and the viscosity of the molten material determine the transport behavior. If some of the material frictional performance is poor, if you do not solve the feed problem, it is more difficult to feed the material into the single screw extruder. Therefore, the granular raw materials for single-screw extruder feed.
In twin-screw extruders, in particular intermeshing twin-screw extruders, the transfer of material is to some extent a positive displacement transfer, the degree of positive displacement depends on the ratio of one screw rib to the other screw The relative degree of screw groove. Closely intermeshing the rotation of the screw extruder geometry to get a high degree of positive displacement transport characteristics. Forced feed is formed, and the powdered material is good for squeeze feed.