Twin-screw conveying elements

Figure 12.40 End view of intermeshing corotating twin-screw conveying elements with in the barrei outline, showing the three separate lobal melt pools.

A schematic representation of the tracking of color particles is shown in Figure 22.10. The flow situation being described in this figure corresponds to the flow in fully filled conveying elements of a corotating intermeshing twin screw extruder. In essence, what happens in the depicted flow problem is that a polymeric flow takes place in... 

Polymer material is fed into the co-rotating twin-screw extruder and is conveyed in a loosely packed form in a normally partially filled material conveying section. In the screw, barrier elements such as reverse screw element(s), and/or reverse/neutral kneading hlock(s), are installed... 

Table 7.1 Main characteristics of conveying elements and kneading blocks of twin-screw extruders ((a) and (b) should not be directly compared) [44].

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