Machine for forming recesses in unhardened cement blocks

摘要

The recess forming machine for cement blocks (1) has rotary shafts with tool carriers (6) movable inwardly into the surfaces of the block to carry cutting tools (12). The tools simultaneously form recesses in multiple faces of the block and extend radially from the shafts to define the recess diameters. The claims also include a method for forming the recesses.