Principle Of Operation; Mix Batching; Aggregate; Aggregate Control Gate - PROALL G Series Operator's Manual

6. Field Operation

Principle of Operation

The ProAll Mobile Mixer is uniquely designed to
allow for the supply of freshly mixed gunite,
regardless of delivery times, the elimination of
wasted product, and flexibility of delivery that is
not available with conventional transit mix
operations. Your aggregate and cement are
transported to the site in separate compartments
and are accurately proportioned and delivered to
the mixing auger as they are being discharged.
The mixing action is continuous until the bins are
empty or indefinitely if the bins are being refilled
as the unit is producing gunite. On the other hand,
the mixing action may be stopped and then
started again by the operator to facilitate the
loading of wheelbarrows or any application where
small amounts of product are required. The
discharge rate is infinitely variable from
maximum, 25+ cubic meters per hour down to
zero.

Mix Batching

Ingredient proportioning is based on the known
dry weight of each ingredient and the
requirements for each as specified in the mix
design. The calibration procedure translates these
weights into volume settings.
Cement is fed into the mix at a constant rate that
is proportional to the movement of the conveyor
belt. The control gate allows the operator to
change the proportional flow of sand in relation
to the movement of the conveyor belt and
therefore, to the flow of cement. Because the
cement and aggregate feeders are mechanically
synchronized, the proportions of each of the dry
ingredients are constant, once the proportioning
controls are set and locked.
Rev.
1
An electronic counter allows the operator to
determine the accumulated amount of cement
discharged and, based on the calibration, the
amount of mix produced.

Aggregate

Materials loaded into the sand bin must be free of
any foreign matter that may affect the quality of
the concrete being produced or cause a partial or
complete blockage in the control gates.

Aggregate Control Gate

The aggregate bin discharge gate controls the
amount of material that exits the aggregate bin.
The gate handwheel labeled 'GATE A' controls the
opening.
NOTE: Once the gate height is set, ensure the gate
is locked into place using the gate handle lock to
prevent the gate height from changing while in
operation.
NOTE: The numbers on the dial indicate the
increase of height only, not the actual
measurement of the height, and are for the
operator's reference.
Figure 2. Aggregate bin control gate. (1) gate handle lock,
6-1
MX05001
2
1
(2) gate handle.
3 March 2022