Gear mixers

Figure 15.9 Schematic for a blister and gear mixing section. The blisters are used to adjust the specific rate of the process, and the gear mixer and second blister are used to distribute and disperse the stripping agent into the resin...

The present tendency in CORl development is to (1) maximize throughput from the given size machine by maximization of the extruder free volume or the OD/ID screw ratio, (2) provide capability to efficiently transmit the required amount of power into the material, and (3) increase the extruder speeds. The modem machines from Werner Pfleiderer are supplied with OD/ID = 1.55, those from Berstorff with 1.74 (for reactive compounding and degassing). The latter company also developed several mixing elements turbo or gear mixers) well suited for mixing resins with different viscosities. Smaller industrial CORl machines are available from JSW with the screw speed of N < 1,500 rpm. Similar speeds are also offered... 

Figure 5.24 Modular assembly ofscrew and sectionized barrel (highlighting the kneading section and gear mixer section). Courtesy of KraussMaffei Berstorff [10. ...

Sun (main) screw Fig. 62. Schematic of planetary gear mixer. 

The fitting of a Maddock mixer, planetary gear mixer, or cavity transfer mixer would not disperse the agglomerates. 

Figure 12.41 Picture of intermeshing gear mixers in a twin-screw profile.

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