Materials that tend to harden during mixing cause rapid wear of the machines. The new continuous-motion Druvaflex Ploughshare mixer was developed with such applications in mind. The Ploughshare mixer was equipped with a vessel made of multi-layered, reinforced rubber. Due to its elasticity, the flexible mixing vessel — secured in a steel corset — is better able to withstand the pressure of the mixing blades. These blades have the effect of loosening the hardened, brittle product layers from the walls and the material is returned to the mixing process. Rapid wear of the mixing blades and troublesome vibrations are thus effectively prevented. The Druvaflex mixer is available in several sizes for throughputs up to 200 ton/h. — Gebr. Lödige Maschinenbau GmbH, Paderborn, Germany