For Sale - SRP - 2014 - Pulsar Mixing Screw for Injection Molding and Extrusion

The Pulsar screw is a low shear distributive mixing device that is installed near the discharge end of a plasticating screw. The feeding and pumping mechanisms of the pulsar are the same as a single flighted screw; however, the melting and mixing effects are superior to a single flighted non-mixing design.

The Pulsar assist in the melting phase by having a portion of the mixer at a shallower root depth, thus delivering a degree of increased shear and melting capability. Even though there is an increase in the localized shear rate with this design, there is a deeper channel that cools the polymer and delivers an overall cooler melt.

The homogenizing effect is accomplished by the wavy root action of the design that delivers a change in velocity and a sliding and tumbling movement when it goes from the deep section to shallow sections. This distribution delivers a more uniform, homogenized melt with minimal temperature differential.

The more uniform the polymer, the more consistent the viscosity and hence the potential for consistent, repeatable flow through the die or into the mold. The more repeatable the flow, the greater the molecular orientation which determines the physical properties of the component being manufactured.