HANSER Hanser Publishers, Munich • Hanser Gardner Publications ...

5.2.2 Melt Conveying
Starting from the parallel plate model and correcting it by means of appropriate correction
factors [7], the throughput of melt in an extruder can be calculated. Although the following
equation for the output applies to an isothermal quasi-Newtonian fluid, it was found to
be useful for many practical applications [3].
For a given geometry of the melt zone (Figure 5.21), the output of a melt extruder or
that of a melt pumping zone of a plasticating extruder can be determined as follows
[3,7]
Helix angle