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November 1, 2006

1 Min Read
High-productivity mixing screw

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The Fusion II screw reportedly delivers enhanced chaotic mixing while retaining the productivity benefits of fast plastication and low melt temperature provided by the original Fusion screw. The Fusion II screw processes such resins as polyethylene (all types), polypropylene, PET, ABS, and PLA in injection molding, extrusion, and blowmolding applications.

The screw has two barrier zones. The first melts and meters the material forward to a homogenizing transition zone, which is followed by a second barrier zone with an undulating root profile providing intensive, chaotic mixing. The key difference between the Fusion II screw and earlier models is that primary flights in the second barrier zone have grooves. The design is covered by Patent No. 7,014,353.

The grooves in the flights allow materials in adjacent melt channels to mix together, enhancing the mixing action produced by the screw?s undulating root profile. This further improves the dispersion of color and additives in the melt and enhances melt homogeneity. In injection molding, extrusion, and blowmolding, the screw can increase the plasticating rate by 15% and reduce melt temperatures up to 10ºC compared with standard mixing screws.

Xaloy, New Castle, PA
(724) 656-5600; www.xaloy.com

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