BMS alpha CR, Operating Instructions Manual

Page: 47 / 188

Layout and function 4
Functional sequence 4.5
47
4.5 Functional sequence
During the filling of the mixing and delivery vessel with the components of
the building material to be mixed, the material is mixed. The mixer works as
a compulsory mixer. Depending on the option, the material is filled directly
into the mixing and delivery vessel or via a feeder with or without scraper.
The mixing and delivery vessel is filled with material to just below the dome.
The operator closes the dome cover after the scheduled mixing time has
elapsed. The mixing and delivery vessel and the delivery hose are
pressurized with the compressed air generated by the compressor unit.
The upper air flows into the mixing and delivery vessel. The lower air flows
into the delivery hose.
The levers for the delivery rate of the upper and lower air are adjusted
according to the delivery distance and delivery height. The upper air, in
conjunction with the mixing blades, forces the mix into the delivery hose.
The lower air forces the mix in the delivery hose through the delivery hose to
the discharge stand.
Screed pumps are flow conveyors. The mix is conveyed discontinuously.
This method of operation creates compressed air cushions between the
"material packs". Material and compressed air are discharged alternately
from the discharge stand.