Compounding: Randcastle compounders use our exclusive, patent pending, Recirculator mixing elements for state of the art mixing.  The Recirculator creates multiple elongation---dispersive---flow fields.  These flow fields break agglomerates and are a primary melting mechanism.  Within the Recirculator, some flow is directed upstream!  The upstream flow then folds into the downstream flow for recirculatory flow.  Up to four Recirculators are available in a single 50/1 screw.  Examples of use:

Solids Additional To Polymer:

• Nanopowders: Pictures at 5,000, 10,000, and 50,000 times magnification.

• Wood Flour:     

                       § Picture of 25% and 40% wood flour and LDPE pellets

• Nanopowders: Rutgers study of Recirculator with ceramic nanopowders.

                       § Picture of 40% wood flour and RPVC   

•  Color: 0.5% red and 0.5% yellow pigment in “Classic” extruder compared to Recirculator.

•     Nylon 66: Picture compares strand from “Classic” extruder to Recirculator showing no reagglomeration from Recirculator processing.

        Melt Blends

• Immiscible: PS/PE pictures comparing “Classic” extruder to Recirculator

• Immiscible: PS/PE graph showing improvement from Recirculator.

• Miscible: PE/Elastomer: Pictures comparing UC (aka Union Carbide/Maddocks), double wave screw to Recirculator.

Principle Of Operation: A quick look at how the Recirculator works.

Compounding Tutorial: A series of slides from Randcastle compounding presentation.

Compounding Paper: A published, peer reviewed, paper on the Recirculator.

Picture of  ⅝ inch 50:1 screw with 4 Recirculators