Nordson Tribomatic 2, Руководство пользователя по изделию

Страница: 33 / 73

Operation
4-1
E 1998 Nordson Corporation
All rights reserved
303 815A
Issued 3/98
Manual 37-32
Section 4
Operation
WARNING: Allow only qualified personnel to perform the
following tasks. Observe and follow the safety instructions in
this document and all other related documentation.
WARNING: All electrically conductive equipment in the spray
area must be grounded. Ungrounded or poorly grounded
equipment can store an electrostatic charge which can give
personnel a severe shock or arc and cause a fire or explosion.
WARNING: Make sure the gun is grounded before spraying
powder or cleaning the gun with compressed air. Without a
ground connection the gun will become electrostatically
charged. Personnel touching the gun could receive a shock.
Each automatic gun is controlled by one gun control unit which houses
electrical controls, a digital display, and regulators and gauges for
flow-rate and diffuser air. Refer to the control unit manual for operation
instructions.
Powder volume, velocity, and atomization are controlled by the flow rate
and diffuser air pressure settings. As a starting point, set air pressures
to:
Flow-rate (ejector) air pressure 1.8 bar (26 psi)
Diffuser (atomizing) air pressure 2.5 bar (36 psi)
Keep the flow-rate air pressure as low as possible. Maintain the same
ratio of diffuser air-to-flow-rate air without reducing the charging level.
Reduce the diffuser air pressure if powder is being blown out of recesses.
Build coating thicknesses slowly. Reduce air pressures to keep
overspray to a minimum.
Experiment with the part hanger configuration and part density. Reduce
the space between parts to keep overspray to a minimum. Keep the air
velocity through the booth as close to the minimum required by law as
practical without violating safety.
1. Introduction
2. Operation