Powder Management System - Electrostatic Technology 802 Manual

Electrostatic Technology, Inc.
6.5

POWDER MANAGEMENT SYSTEM

The Powder Management System consists of the 5 HP Powder Collector (See figure 1A) with
a HEPA afterfilter, Load Box, Lower Fluidizing Hopper, Powder Level Sensor, Powder Dryer
and Powder Pump plus a Scrap Powder Collector (See figure 1B) for powder which has been
collected after it has been heated and is no longer usable.
A specially designed cloud containing hood on the Coater with connecting duct-work
completely controls the powder cloud during coating operation and transports undeposited
good powder to the Powder Collector via flexible hose. Once this powder enters the Collector,
it is mixed with virgin powder coming from the Load Box and collects in the lower Fluidizing
Hopper.
All powder must be added/supplied to the system through the Load Box, which is located on
the side of the Powder Collector. During continuous coating operation, additional powder can
be added to the system through the Load Box. Once powder is loaded into the Load Box, it
settles to the bottom and travels through a transition tube then enters the Powder Collector.
Powder inside the Powder Collector settles and collects in the Lower Fluidizing Hopper.
As re-claimed powder enters the Powder Collector, it passes through the Powder Collector
Filters.
operation by pulses of compressed air through the filter element (from the inside outward).
This removes collected powder from the outside surfaces of each filter element. Clean air exits
the Powder Collector and passes through an afterfilter while the collected powder falls into the
storage container at the base of the unit, the Lower Fluidizing Hopper. The Powder Pump then
recycles the powder by pumping it back to the Coater transfer box as needed.
The pneumatic Powder Pump is mounted to the outside wall of the Fluidizing Hopper. This
pneumatic Powder Pump pumps a mixture of air and powder from the Fluidizing Hopper to the
Transfer Box located on the rear of the Coater hood. Once in the Transfer Box, the powder
settles and the air exits to the exhaust outlet. The powder will feed itself into the Coater Bed,
keeping the powder level at a constant height. When the Level Sensor notices the powder
level has dropped below the sensor tip, the Powder Pump will turn "ON" and pump powder to
the Transfer Box. The Powder Pump turns "OFF" when the Level Sensor enough powder.
The pneumatic controls for the Powder Pump feed rate are located on the Powder Collector.
In addition, there is a Scrap Powder Collector to store the scrap powder to be discarded. This
scrap powder is the powder collected after the part has entered the Induction Heater to be
cured.
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The (4) Filters are automatically and sequentially cleaned continuously during
Model 802 Armature Coater
Serial #15681