Multi-Flighted Extruder Screws

The conventional multi-flighted extruder screw has a number of advantages and disadvantages. The basic geometry is shown in Fig. 8.52. 

Figure 8.52 Conventional multi-flighted extruder screw...

In co-rotating twin screw extruders, in addition to flow splitting at the flight, further flow splitting takes place in the intermeshing zone (see Fig. 9.5). Furthermore, a multi-flighted screw geometry increases the number of partial flows. The number of partial flows equals... 

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