Mixing device for flowable materials, in particular building material mixtures

摘要

A mobile mixing assembly for granular building materials has an inlet hopper (2) to a mixing zone (4) with a rotating helical mixer blade (12). The mixer zone (4) has a peripheral inlet pipe (6) around a concentric inner inlet pipe (5) made of more flexible material than the outer pipe. The inner inlet pipe is removable for cleaning. The inner pipe is made of a polymer e.g. rubber and/or an elastomer, and has a Shore A Hardness in the range 60 to 100. The outer pipe is made of steel or a fiber-strengthened composite material.