Figure 5. Resin pressure
distribution determined from numerical simulation and location of the
pressure sensors (1.0 kg/h, 88 rpm). (a) Contour plot, (b) Plot along
the machine direction.
The pressure distribution for a feed rate of 1.0 kg/h and a screw
rotational speed of 88 rpm is shown in Figure 5. The resin pressure
distribution of the contour plot indicates that the pressure in the
kneading section and the pushing side of the full-flight screw are
relatively higher than those in the other area. The resin pressure
distribution along the horizontal line shown in Figure 5 (a) is shown in
Figure 5 (b). The resin pressure switches between 0 and 1.2 MPa along
the full-flight screw section. Since there is resin in the pushing side,
the resin pressure becomes positive while the resin pressure becomes
zero on the trailing side, given that there is no resin. The
experimental data for the kneading disc section is shown as □. The
discrepancy between the simulation and experimental results is 0.08 MPa,
corresponding to a relative discrepancy of 8.4%, based on the
experimental results.
(a) (b)