Technology

ResonantAcoustic® Mixing Technology Solves Mixing and Dispersion Problems Characteristic of other Commercial Mixers

resodyn-how_resonant_acoustic_mixing_worksPatented ResonantAcoustic® Mixing is a new approach to mixing and dispersion of materials ranging from nanoparticle suspensions to viscous gels. It is distinct from conventional impeller agitation found in a planetary mixer or speed mixer as well as ultrasonic mixing. Low frequency, high-intensity acoustic energy is used to create a uniform shear field throughout the entire mixing vessel. The result is rapid fluidization (like a fluidized bed) and dispersion of material. The mixing benefits are applicable to a wide variety of compounds.

How ResonantAcoustic® Mixing Works

ResonantAcoustic® Mixing introduces acoustic energy into liquids, slurries, powders and pastes. An oscillating mechanical driver creates motion in a mechanical system comprised of engineered plates, eccentric weights and springs. This energy is then acoustically transferred to the material to be mixed. The underlying technology principle is that the system operates at resonance. In this mode, there is a nearly complete exchange of energy between the mass elements and the spring elements in the mechanical system

ResonantAcoustic® Mixing differs from ultrasonic mixing in that the frequency of acoustic energy is orders of magnitude lower. As a result, the scale of mixing is larger.  Unlike impeller agitation, which mixes by inducing bulk flow, RAM mixing principal is illustrated in the figure to the right. This image shows a freeze-frame of vessel being subjected to a RAM low-frequency acoustic field in the axial direction resulting in disturbances at the surface of the material interface, in this case a semi-viscous liquid and the gas in the mixing vessel. The phenomenon were discovered in 1831 and is known as Faraday Disturbances. The resulting intense “fingers” oscillating from the surface, and coincident “cavities” opening below the surface facilitate the mixing process between the two (or multiple) materials. The image shows this process within only a few microseconds of the mixing process beginning. As the sound energy continues to create disturbances, fingers and cavities become both more intense and more pervasive throughout all the ingredients resulting in significantly faster, more thorough, and more consistent results of liquid and viscous mixes like pastes and slurries. Resodyn Acoustic Mixers, Inc., offers a line of RAM mixers based on the ResonantAcoustic® technology to meet your mixing needs from product development to full-scale manufacturing..

In a ResonantAcoustic® mixer, the only element that absorbs energy (apart from some negligible friction losses) is the mix load itself. Thus, the ResonantAcoustic® Mixer provides a highly efficient way of transferring mechanical energy directly into the mixing materials.  As an example,  a ResonantAcoustic® mixer using 40 HP would require over 770 HP in a non-resonant equipment configuration to mix the same load.