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Published on January 1, 2009

Improving Upon Final-Stage Mixing Process

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Date Published January 1, 2009

This Report has been authored by:Olaf Skibba at VMI-AZ Extrusion GmbH #with# Dave Grepp at VMI-AZ Extrusion GmbH

Internal mixers and batch-by-batch mixing is still the mainstay of today’s mixing technology. However because this batch process is inherently discontinuous, a separate second stage “final mix” is often necessary where the curing chemicals are usually added at low mixing temperatures. Batch-to-batch compound variation is very common, and additional handling between the mixing steps, such as storing, weighing and cutting of the master batch, is required. VMI-AZ Extrusion GmbH has developed a superior final mixing process using a transfermix single screw extruder mixing technology (MCTD) in conjunction with a gear pump. 
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