New advances in screw design and mixing sections have allowed processors to advantage of new resins, higher production rates, and improved product quality. With new material formulations, and increased energy cost it is paramount that the machine utilize the total energy input in the most efficient manner.this paper will present data on the melting performance of a new injection screw design with a unique flight geometry that maximizes the conductive melting mechanism( low shear) in the screw channel. A comparison is made between the total energy required for melting, pumping and mixing characteristics between a standard general purpose screw, barrier screw and a new variable barrier energy transfer screw.