Unimix Screws

Numerous other high-performance screws are available commercially that are not based on wavy channels. Instead they are designed with flow paths that disrupt the normal flow that would occur in a conventional flighted metering section. The most common screws are the Stratablend designs and the Unimix screw. These screws will be discussed in the next sections. 

UniMix Screw, Low-shear mixing screew, Glycon Corp. 

Some of the more widely used high-performance screws include the Energy Transfer (ET) screw [19], the Variable Barrier Energy Transfer (VBET) screw [20], the Double Wave screw [21], Stratablend [22] and Stratablend II [23] screws, and the Unimix [24] screw. Other devices can, however, act as a trap for solid materials from the melting section. These devices include Maddock-style mixers [25], spiral dams, and blisters. They will be briefly discussed in this section as many of them have been the subject of many articles on secondary mixing processes. 

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