11
RediCoat Dolly Systems
PART 1082648A
© 2007 Nordson Corporation
Operation Description
The powder pump creates a vacuum in the pickup tube which pulls the
fluidized powder from the box or hopper and then forces the powder through
the powder hose to the spray gun.
The electrostatic voltage and the pump are adjusted by the voltage control
knob and air regulators on the control unit. The fluidizing air pressure is
adjusted by the needle valve mounted on the control unit support column.
The electrostatic voltage (up to 90KV) applied to the spray gun electrode
generates an electric field that charges the sprayed powder. The charged
powder is distributed as a cloud and attracted to the grounded workpieces.
The powder that does not stick to the workpieces can be collected, sieved,
and re-used. Effective recycling could save 20% of the powder coatings,
and decrease cleaning time.
Grounding
Each component of the system should be connected to the ground stud on
the control unit column with the included ground wires. The included ground
cable with clamp should also be connected to the ground stud, and to a true
earth ground, such as the powder spray booth.
Not properly grounding both the RediCoat system and the workpieces may
cause the following coating problems:
•
poor powder coverage
•
rough powder coat
•
powder being attracted back to the spray gun, coating the spray gun and
operator
The electrical resistance between the workpieces and the ground must not
be more than 1 M
Ω
. Test the resistance regularly will a megohm meter.
Operation
Startup
Allow only qualified personnel to perform the following tasks. Follow
the safety instructions in this document and all other related documentation.
See Figures 4, 5, and 6 for system connections.
1. Locate the dolly system on a level surface.
2. For hopper systems, install the hopper on the dolly and connect the
ground cable from the hopper to the ground knob.
3. Install the pickup tube and pump. Connect the ground clamp to the nut
on the flow rate air fitting on the pump.
4. Connect blue 6 mm tubing to the needle valve outlet and the fitting on
the pickup tube, or the fitting at the bottom of the hopper.
