Electrostatic Technology, Inc
FlexiCoat
®
Model 300 Coater
12 Serial
#20158
6 DESCRIPTION OF COMPONENTS
6.1 FLEXICOAT
®
300 COATING STATION
The coating machine is complete with Coating Bed, Powder Feed Chamber, High
Voltage Multiplier, Air Flow Meter, Vibrator (to insure proper fluidization), and
Tooling Plate with Low Velocity Plume (cover). The coating chamber is of a
patented design that insures that neither powder, substrate being processed, nor
foreign objects can contact the charging media.
6.1.1 Tooling
Plate
A plastic Tooling Plate is mounted over the top of the Coating Bed to increase
the efficiency of the powder coating process.
The Tooling Plate restricts the opening out of which charged powder comes up
from the fluidizing bed. This causes the powder to be directed toward the
specific part to be coated instead of using the entire bed area.
In this Machine, the Low Velocity Plume (cover) is attached to the Tooling
Plate.
6.1.1.1
Low Velocity Plume (cover)
This is a plastic plate with a slot, mounted on the Tooling Plate to control
powder deposition for a specific part.
6.1.2 Powder Level Sensor
A powder level sensing unit (Dwyer Photohelic
®
Gauge/Switch) monitors the
powder level to maintain an optimum level of powder in the coating bed to
ensure coating repeatability and uniformity from part to part. As the powder
level drops, the level sensor sends an electronic message to activate the Powder
Pump Solenoid. The Powder Pump replenishes the powder into the Coating Bed.
When the proper level is obtained, the Powder Pump shuts off.
The Powder Level Sensor consists of a control sensor and two inputs which read
the difference between the pressure at the powder level in the Coating Bed and
atmospheric pressure outside the Coating Bed area. The range of the control
sensor has been pre-set at the ETI factory and should not be touched or changed
without consulting ETI personnel. The Photohelic
®
Gauge/Switch which
indicates the pressure range is located on the Control Panel on the left side of the
FlexiCoat
®
300 Cabinet. When the Indicator needle comes in contact with the
Left Set-Point Indicator, the Powder Pump goes "ON" and stays "ON" until the
Indicator Needle comes in contact with the Right Set-Point Indicator, at which
time it shuts "OFF", until the Indicator Needle makes contact with the Left Set-
Point Indicator again.
