Revised A
13
6301
2. Introduction to atomizer (continued)
2.2. Parts description and functions
Parts
Function
Bellcup
Designed to atomize various types of paints. Specific bellcup
design is selected by the type of product being sprayed.
Turbine motor
Designed as a high speed, durable, bearing-less drive motor;
the turbine is responsible for rotating the bellcup. Atomization is
achieved by the centrifugal forces generated by the bellcup
rotation. The size of sprayed paint particles decrease as the
speed of the turbine motor increases.
Manifold
It encloses all fluid circuits and provides housing for Nano-
valves (air, paint, solvent) a paint regulator and a restrictor.
Cover / shaping air shroud
(shaping air assy)
Designed to precisely direct compressed air to the outer edge of
the bellcup. This air is used to form or shape the atomized paint
particles into a controlled pattern that maximizes transfer
efficiency. It also protects internal components and eases
cleaning.
Robot quick disconnect plate
Provides a sealed interface without contamination for fluid/air
supplies. It eases atomizer installation and removal.
UHT 153 High voltage cascade
Supplied with low voltage, the cascade is designed to generate
a high voltage output which is used to charge atomized paint
particles. Transfer efficiency increases with the use of high
voltage.
Protective cover
Protects internal components from paint contamination and
eases cleaning operations.
Quick disconnect tightening
ring
Ensure a tight junction between robot atomizer quick disconnect
plates.
Clip
Designed to attach the bellcup to the turbine motor. The under
side also includes a half-moon groove. This groove is used by
the speed feedback circuit to measure bellcup rotation.
Injector holder
Positions the injector in the center of the bellcup. Also
incorporated in this small manifold or holder are microphone air
supply and return passages.
Injector/restrictor
The injector/restrictor directs the fluid flow into the bellcup. Both
the fluid output velocity and fluid back pressure are affected by
the inner size (dia.) of the injector/restrictor. Proper size selec-
tion is determined by paint viscosity and film build desired.
Regulator
The regulator is used to precisely control fluid flow to the
bellcup. Working in conjunction with a fluid flow meter, accurate
“Closed Loop” fluid control can be achieved.
Robotic elbow
Provides a 60
o
angle to body.
Nano-valve
Air actuated, two positions, normally closed valves, which per-
form, varies operations; paint trigger, paint dump external cup
wash, injector wash. Refer to operating sequences and dia-
grams for detailed paint, solvent and air paths section 3.
