Gravimetric Batch Blenders w/Mitsubishi Control Chapter 2: Functional Description 19
Weigh Hopper
The weigh hopper on the Slide Gate/Auger blender is used to weigh each batch of material,
and includes an air-operated discharge valve. After the batch is weighed and the level sensor
in the lower mix section is uncovered, the valve will open and discharge the batch into the
mixer with the existing blended material. The discharge valve is also provided with a quick
disconnect so the weigh hopper can be removed for cleaning.
On a Slide Gate blender, the weigh hopper rests on each side on a precision cantilever load
cell. To remove the weigh hopper, lift the hopper from the bottom, hold the discharge valve
closed, and slide it out once clear of the locating tab on the bracket above the load cell.
Once the hopper has been cleaned, reposition it onto the load cell brackets, using care not to
damage the load cells. Position the hopper as close to the center position between the load
cells as possible.
Note: Use care when replacing the weigh hopper, since the load cells are
delicate weighing instruments and can be easily damaged. Do not use
force to push in the weigh hopper. If it is positioned properly, it will
slide in very easily.
Note: Load cells, if damaged, will have to be sent back to the manufacturer
for testing and evaluation.
Figure 6: Typical Weigh Hopper
DISCHARGE VALVE
LOAD CELL
LOAD CELL
WEIGH HOPPER
LOCATING TABS
IR CYLINDER
The Auger-HC style weigh hopper is bolted in place, and is generally not removed except for
maintenance.
