Ultra-fine grinding with exact upper particle size limitation as well as dedusting are the essential requirements for 3D printing with polymer powders. The Contraplex wide chamber mill has proven itself in practice for many years and has been adapted for the requirements of 3D printing. "The CW II is distinguished by optimised grinding tools and temperature control, which reduce liquid nitrogen and energy consumption,” says Alexander Krauser. Tumbler screening machines or air classifiers are used to achieve the required particle size distribution.
The latter ensure, for example, dedusting of particles smaller than 10 - 20 μm as well as a upper particle size limitation of 70 - 100 μm.