Figure 4. Screw configuration and barrel temperature setting
Table 3 summarizes the design of the experiments. The screw rotation speed and feed rate were varied from 39 to 88 rpm and from 1.0 to 3.0 kg/h, respectively. Two series of experiments were performed. The effect of the rotational speed was examined at a feed rate of 1.0 kg/h. The effect of a feed rate at 88 rpm was also measured. These experiments were carefully devised to ensure that the resin does not overflow from the port opening.
Table 3 Design of experiment