Building-up and projecting appts. for low-density concrete - uses electric motor driven multiple mixing blades and air compressor to spray concrete to provide coating

摘要

The machine comprises a chassis mounted on wheels on which is fixed a mixing vessel traversed by a horizontal arm carrying mixing blades, a motor driving the arm, a peristaltic type pump to pump the concrete mixture through a flexible hose to a projection nozzle and an air compressor linked to the nozzle and having a controller for the compressor or its drive motor. The peristaltic pump is of linear format and comprises a deformable tubular trunk squeezed by pressure wheels. The blades of the mixing chamber are made up of flat curved blades helically arranged inside the chamber. The direction of the drive motor is reversible, controlled from the projection nozzle.