FrymaKoruma’s Coball annular gap bead mill is an in-line milling system for manufacturing suspensions and other products of almost any viscosity. With its innovative design, the mill is ideal for the superfine grinding of active pharmaceutical ingredients such as ophthalmic medications and sterile ointments as well as numerous cosmetics and chemical applications. The Coball mill’s narrow milling chamber is filled between 50 and 80 % full of beads. Its milling power is high in relation to the very small cham-ber and the grinding energy input can be as much as 8 kW/dm³. Extremely homogeneous results and particle sizes on the nanoscale are possible in this way. Thanks to the conical geometry of the rotor-stator tool, the mill transfers the milling forces directly into the product. The residence time in the milling chamber is therefore reduced. Despite the high energy input, the process temperature can be precisely controlled because the mill has an efficient heat exchange surface. Cooling ducts in the rotor, stator and mill cover prevent the product from overheating. The annular gap bead mill is also easy to clean owing to the small volume of the milling chamber.
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