The Munson Fluidized Bed Mixer is a machine of extremes, offering unique benefits within a narrow range of applications in which its limitations are not a factor.
It is among the fastest of all mixers, with cycle times of 10 seconds to two minutes, with one minute typical, yielding a ~5% CV (coefficient of variability).
It also mixes more gently than other agitated blenders, and evacuates blended batches almost instantly through its full-length, drop-bottom gates.
Although it resembles a ribbon, paddle or plow blender from a distance, it differs radically in design and operation. Instead of a single shaft turning agitator blades slowly within a U-shaped trough, the Munson Fluidized Mixer is configured with two counter-rotating shafts turning paddle agitators rapidly within two, parallel U-shaped troughs.
Flat, angular paddles with overlapping paths effectively sweep material from the troughs toward the center and upward, causing it to become airborne in a "fluidized zone" above the longitudinal centerline of the mixing chamber, where discreet particles of batch ingredients readily intersperse, regardless of disparities in particle size, shape or bulk density.
The fluidized zone is also an ideal location in which to spray high- or low-viscosity liquids, which disperse more readily throughout the batch than in ribbon, paddle and plow blenders. As a result, liquids can be added in significantly higher volumes while maintaining free-flowing characteristics of the batch.
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