Kneading disks

Fig. 10.11 Snapshots of the repetitive expansion/contraction of each of the cross-sectional area pockets between a pair of kneading disks and the barrel of fully intermeshing, co-rotating extruders. The evolution of the expansion/contraction is followed for one of the three pockets, ...

Fig. 10.62 Schematic description of (a) the solid/liquid mixture in the screw channel, and (b) around a kneading disk (93).

Fig. 10.67 Experimental and simulated pressure profiles obtained with kneading disk 5 of the 45/ 5/20 element sequence shown in Fig. 10.65(b). (a) Apex region and transducer (b) wide channel region and side port. [Reprinted by permission from V. L. Bravo, A. N. Hrymak, and J. D. Wright, Numerical Simulation of Pressure and Velocity Profiles in Kneading Elements of a Co-TSE, Polym. Eng. Set, 40, 525-541 (2000).]...

Finally, reactive processing in full nonisothermal, twin-rotor channel flows has not been solved for all but full bilobal kneading-disk sequences and screw-mixing... 

Twin-screw extruder Dimensionless calculations of throughput and pressure gradients for flow of non-Newtonian fluids in screw and kneading disk elements of a modular intermeshing self-wiping corotating twin-screw extruder, as well as the temperature rise. Chen and White, 1992, 1993... 

Twin-screw extruder Flow of Newtonian fluids in kneading disk elements and (right- and left-handed) screw elements Szydlowski et al. 1987... 

Table 9.10 Effect of the twist angle on the performance of a block made of six Erdmenger s kneading disks ...

Y Shimizu, S Aral, T Itoyama, H Kawamoto. Experimental analysis of the kneading disk region in a co-rotating twin screw extruder. Part 1. Flow characteristics of the kneading disk region. Adv Polymer Tech 15 307-314, 1996. 

Distributive mixing is achieved in kneading disks and slotted mixing sections placed along the screw. W P has developed a mixing tip [45] that has a protruding helical flight as shown in Fig. 10.64. 

Mixing with wide (left) and narrow (right) kneading disks... 

Figure 7.7 shows the qualitative effects on dispersive and distributive mixing when different kneading disks design features are utilized [8]. To increase distributive mixing. 

Figure 7.6 Examples of conveying and kneading disk elements...

Szydlowski, R., R. Brzoskowski, and J. L. White. 1987. Modeling Flow in an Intermeshing Co-rotating Twin-Screw Extruder Elow in Kneading Disks. Int. Polym. Proc., 1(4), 207-214. 

The reason that a TSE is considered to be superior to a single screw extmder is due to the mixing provided by the presence of kneading disks. A... 

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