Four-flighted rotors

Kobe Steel reported two rotor developments. The first development is an improvement of the four flight rotor by extending the long rotor wing until four times the short rotor wing (see Figure 35.23). As for the ST rotor it can be mn in an even speed or with friction. The performance improvement can... 

Basically it is found that material in the internal mixer chamber for double- and four-flight rotors circulated around the mixing chamber (Fig. 21). 

Figure 9 Lasch and Frel [29] four flighted rotor design...

TABLE III Flow Characteristics of Double- and Four-Flight Internal Mixer Rotors from the Patent Literature... 

Figure 1.7 Four flighted non-intermeshing rotors (a) Lasch and Frei 1938 design (b) Tyson and Comper 1964 design (c) Sato et al. 1979 design.

Figure 9.10 Wiedemann and Schmid [33] four flighted nonintermeshing rotor...

The reactor consists simply of a horizontal tube, usually heated externally by means of a suitable furnace. Inside the tube is a screw agitator and conveyor, which is rotated slowly. A typical example is shown in Fig. 5.2. The agitator conveyor can take several forms the one illustrated consists of four long flights twisted with an even pitch about the shaft in a similar manner to the rotor of a lawn mowing machine. In other models two flights have been used instead of four. The flights are attached firmly to the shaft by means of struts, or studs in the case of a small model, in a direction such that the flat sides follow the contour of the cylinder in which they rotate. 

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