Resodyn Acoustic Mixers

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How can RAM help you?


Viscous slurries and pastes are made up of solids in a liquid matrix, requiring multi-stage mixing of the materials. RAM mixers accelerate these processes by inducing Faraday Disturbances, or invasive “fingers” coupled with enveloping “cavities" at the boundary between materials of different densities.

Progressing rapidly through wetting, incorporation, and mixing, RAM delivers highly homogeneous, higher viscosity results significantly faster than traditional technologies.

Rapid Slurry Generation

Every liquid-solid mixing process requires wetting, incorporation, and finally mixing processes. Without the necessity of all materials to pass through a limited mixing zone using propellers, RAM technology performs all three steps simultaneously and consistently throughout the mixing vessel, reducing processing time by orders of magnitude.

Eliminate Sequenced Ingredient Addition

RAM mixing processes do not require the “right” sequence of ingredient additions. RAM technology mixes throughout the entire vessel, immediately and continuously. Direct, multiple ingredient processing eliminates ingredient addition time, chance for addition error, and virtually eliminates individual ingredient vessel clean-up.

Improved Suspension Life

The superior result of RAM mixing contributes to better suspension and longer term stability of slurries. Solid particles that tend to agglomerate and fall out of suspension are better separated and thus stay in suspension for longer periods, in some cases permanently.

Faraday Instability

Named after Michael Faraday, a 19th century scientist, Faraday Instabilities are nonlinear waves that appear on liquids due to the high amplitude, periodic driving force. Under the proper conditions, the flat surface of the liquid becomes unstable. RAM technology is particularly effective at inducing these instabilities and is the first technology to make practical use of the phenomenon.

In the high-speed video below, instabilities can be seen both above and below the clear liquid surface as spikes, or fingers above the surface as well as cavities below. Vast increases in the surface area of the material boundary facilitates and accelerates mixing of the materials.

When occurring in a liquid–solid mixing environment, the same phenomenon occurs, though largely hidden from view, resulting in rapid, thoroughly mixed and dispersed solids in the liquid matrix. In this high speed video, orange chalk is incorporated rapidly into corn syrup.


The Mechanics of RAM Mixing

RAM technology drives intense liquid to particle interaction through Faraday Instabilities throughout the materials instantly and continuously. ResonantAcoustic® Mixing delivers rapid, thorough mixing with excellent suspension stability and improved product shelf life.

  • Vertical vessel movement of 60 x/second and 0.55” / 14 mm displacement, at up to 100 g of acceleration generates intense particle motion.
  • RAM’s primary slurring mixing mechanism is intense liquid and solids material boundary interaction, facilitating and accelerating mixing.
  • The addition of processing vacuum improves more viscous slurry mixing and aids in de-gassing.

How RAM Compares to other Methods

Stop dragging material to the mix

  • Traditional mixing methods require all ingredients to traverse the entire vessel to repeatedly enter and exit a small, localized mixing area to achieve proper mixedness.
  • RAM technology activates all ingredients throughout the vessel immediately, eliminating material motion without mixing. RAM mixes everywhere in the vessel, all the time.

Bringing Quality to Slurry Processing

  • High quality slurry performance requires thorough distribution of solids in the liquid matrix, and stable suspension conditions for consistent processing characteristics at any point in the slurry.
  • RAM’s intense and pervasive processing facilitate solid particle separation and dispersion, improving suspension stability and performance.


White Papers

Powder Incorporation in Viscous Liquid

Many polymer-based materials require the addition of dry or powder materials for specific performance characteristics or coloration. To illustrate dry powder incorporation in a viscous liquid, a small amount of dry ingredient is rapidly blended with a viscous liquid. This footage of mixing phenomena reveals how the thoroughly blended and uniform mixture is achieved in a very short mixing time.


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