Plastics Review

How does screw geometry affect the rate of melting?

Slugs have been widely used for polymer processing for many years, but their performance remains something of a mystery to those who work with them day in, day out. For example, the melting rate is not as closely related to the geometry of the screw as one might think. Rather, it is determined by the peripheral speed of the screw, the temperature of the cylinder, and the thermal and viscosity properties of the polymer.