TECHNOLOGY | MIXING


opposite directions enabling particularly gentle mixing. Through an association with Sumitomo (SHI)


Demag, Japanese company Moriyama, known for its deep understanding of kneading processes, also had a presence at K2025. A Moriyama mixer on display at the Sumitomo (SHI) Demag booth was developed by German metal forming special- ist Leifeld in collaboration with Japanese SHI subsidiary Nihon Spindle Manufacturing. Excep- tionally easy to clean and maintain, Moriyama mixers enable rapid material changes and are among the most flexible and efficient solutions for blending materials. Fully compliant with European standards, they have been embraced by the SHI Group as a reflection of a commitment to quality, innovation, and global collaboration. Included in its range are the flagship Dispersion Mixer, the Mix-Labo, the Small Capacity Dispersion Mixer specially designed for small batch processing, and the Reduced Pressure Dispersion Mixer.


Right: The Ross Custom Coaxial Mixer for complex formulations


Flexibility In recent years there has been significant progress in the design of twin-screw technology, with the latest examples incorporating optimised screw geometries, better thermal control, and improved feeding systems to ensure consistent mixing. One company making recent advancements is Ajax Equipment. Founded in the UK in 1970, it special- ises in bespoke, custom-built solids handling and processing equipment, which the company feels gives it added flexibility and a considerable advan- tage over contemporaries selling ‘off the shelf’ machinery. “We have developed twin screw continuous mixing technology for combining powders and granules prior to extrusion and other melt processes,” said Managing Director Eddie McGee. “These are low energy use and very efficient with small footprint and can be far easily cleaned compared to conventional batch mixers. Ajax mixers have been used in automotive plastics, large scale plastics production, and for extremely impermeable plastic film industries.” Ajax is best known for its continuous mixers, which it has been supplying and modifying for a number of years. As the name implies, they are designed for uninterrupted production and allow for continuous material inflow, blend- ing, and discharge, avoiding the quality


44 COMPOUNDING WORLD | November 2025


A Moriyama mixer was on display at the Sumitomo (SHI) Demag stand at K2025


issues often associated with traditional batch processing. The latest examples employ screw augers with proprietary LynFlow ribbon or paddle flights, which provide efficient, low-shear mixing to ensure homogeneity with minimal damage to delicate ingredients. US manufacturer Ross has applied its develop- ment work to mixing innovations, one example being the Ross VMC-300 which launched earlier this year. Engineered for applications requiring ad- vanced mixing capabilities, for example composites, it combines three independently driven agitation systems in one unit, integrating anchor, high-speed disperser, and axial flow turbine technologies to effectively manage complex and viscous formula- tions. Constructed with stainless steel, the VMC-300 has a 300-gallon working capacity and operates under full vacuum up to 29.5-inch Hg and internal pressure up to 15 PSIG at 300°F. The flat-bottomed mix can includes a jacketed sidewall and bottom rated up to 140 PSIG for heating and cooling, while the vacuum cover features multiple ports including various process connections. The three-wing anchor agitator spins at 36 RPM with a 30 HP explosion-proof motor, featuring heavy-duty triangular cross- section design with helical flights and hinged Teflon scraper assemblies that systematically wipe the vessel surfaces. The high-speed disperser reaches speeds of up to 1,150 RPM with a 50 HP explosion-proof motor and


features two 10-inch disperser blades for improved dispersion. The high-speed axial flow turbine system uses


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IMAGE: NIHON SPINDLE


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