The Secret to Super-Fine Stuff: Understanding Bead Mills and Grinding Media
Do you ever think about what gives your paint such a smooth finish or how pens get their ink to flow smoothly without getting stuck? It turns out the key isn't just mixing chemicals but also reducing particle sizes so small they are no longer visible to the eye. Manufacturers achieve smooth finishes using an amazing type of equipment called a bead mill . You don't need to be an engineer to understand how bead mills work; in fact, you're probably familiar with the idea. A bead mill is like a tumbler but has a much higher speed and accuracy than a home tumbler. How a beading mill works. Picture a tube containing thousands of tiny beads inside. Attached to this cylinder is a spinning shaft with arms or discs that are rotated at extremely high speeds. As soon as the machine is switched on, all of these beads collide with each other violently. To process your product, you pump it into the cylinder. As it enters and goes through the furious activity of the moving beads, al...