Filter
Top Products
Chapter 2: Functional Description 17 of 60
OPEN Dump cone gate open all the time
CLOSE Dump cone closed all the time
Each surge hopper is supplied with a lid. Standard lids contain a cutout to accept a vacuum
receiver. A blank lid may also be provided if specified.
If the rate monitor is being refilled from a mezzanine-mounted GH Hopper, the surge hopper
lid will have a tube stub on it.
The surge hopper will be mounted on the frame at the factory. The 24V dc solenoid will also
be factory wired. In some rare cases, it may be necessary to remove the surge hopper for
shipping purposes
Weigh Hopper
The weigh hopper is located within the GH frame. The hopper size is set within the controls.
Default for refilling to occur is 50% of the weigh hopper size.
The weigh hopper on the rate monitor is used to weigh the material entering the extrusion
process. Once the weigh hopper goes below 50% of its set weight capacity the solenoid valve
on the surge hopper will open, allowing material to fall from the surge hopper to the weigh
hopper. The surge hopper solenoid will close once the weigh hopper reaches its set weight
capacity.
Details for installing and removing the weigh hopper are included in the next section. The
weigh hopper will need to be installed before operation can begin. It is necessary to remove
the weigh hopper for shipment, so the loadcell is not damaged.
When the weigh hopper is installed use care not to damage the load cell. Position the hopper
tube stub as close to the center of the hole in the bottom of the frame as possible.
Operator Control Panel Display (optional on GH-M units, 1 required per facility for
setup and Maintenance)
The operator control panel includes an 8-foot (2.4 m) cable and can be remote mounted (not
recommended) adjacent to the GH Hopper. The panel can be unplugged and removed if
necessary. The cable provides 24VDC power to the display, as well as communications to
the PLC.
A programmable logic controller (PLC) controls the GH operation. This design provides
excellent performance along with an easily replaceable control panel in the unlikely failure of
any computer or electronic part.
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.
Note: Load cells, if damaged, will have to be sent back to the manufacturer for
testing and evaluation.
Note: Make sure no part of the load cell bracket is touching the plastic housing
on the load cell. This could result in inaccurate weight readings. If
necessary the plastic on the loadcell can be trimmed back