Design of Pressure Build-Up Zones

It is clear that the required throughput can be achieved even with the smaller ZSK-NT system with significantly improved quality (both criteria an order of magnitude better ), while at the same time significantly reducing the energy input. 

Even at this very high throughput, quality is significantly better and energy input lower than in the reference system studied. 

The discussion of the specific drive power in the previous section clearly shows that improved quality does not necessarily come at the expense of increased energy input. This is due to improved design of each zone for the task at hand. With the optimum speed at each stage, only the energy required for the process is introduced into the product. 

In addition to screw geometries and operating parameters that are targeted to the melting and homogenization processes, the energy required for pressure build-up plays an essential 

ZSK-NT Screw speed (rpm) Motor power (kW) SEI (kWh/kg) Throughput, bimodal 

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