Screw Zones

Figure 10 shows the path lines in the bottom screw zone for the original screw reactor and the redesigned reactor. The path lines clearly show... 

Figure8.20 The screw zone comprises a conveying element-spacer disc-mixing element-spacer disc and kneading element at a pressure difference of 0 bar and melt flow of 0.11 kg/s. The top figure shows the pressure on the screw surface, while the bottom figure shows the axial velocity in the melt channel at half the channel height...

This means that, in the screw zone under consideration, every fluid element passes over the flight tip an average of 3.5 times. The shear rate in the clearance at the flight tip is 3350s 1. 

Thermoplastic type Screw zone length Compression ratio... 

Figure 4-4. Section of In-Line Reciprocating Screw Injection Machine, Showing Screw Zones and...

Extruder Screw Zone Number of Flights Channel Depth, mm... 

---