Description
2-1
Part 1061253B
E 2006 Nordson Corporation
Section 2
Description
Introduction
The MPS610D power supply is used with the
Nordson CoolWave ultraviolet microwave applied
curing system with a CW610 lamphead.
The power supply unit provides the voltage supply
(Lo-Med-Hi) for the lampheads and a control
circuit to interlock the lampheads with the curing
machine.
What is UV Curing?
Ultraviolet curing is achieved by a chemical
reaction in special inks and coatings when intense
UV energy is focused on them. Curing efficiency
depends on UV power, coating weight, operation
speed, type of substrates, material chemistry, and
other factors.
The UV Curing System
The system is designed to cure UV inks,
adhesives, and coatings for numerous industrial
applications.
The system consists of an individual 10-in.
lamphead, a corresponding power supply, and an
RF detector. Additional lampheads can be lined up
end-to-end to form longer curing widths.
Figure 2-1 and Table 2-1 illustrate and describe the
major components of a typical setup for a
CoolWave ultraviolet microwave applied curing
system. Your system may appear different
depending on your application requirements.
How Does it Work?
A microwave generator (magnetron) operating at
2400 to 2500 MHz is used to excite a medium
pressure mercury bulb installed in a lamphead.
Ultraviolet light between 220 and 470 nanometers
is emitted.
Microwave energy from a magnetron is directed
into a cavity containing the UV bulb. A screen
located at the opening of the cavity allows the UV
light to pass through while the microwave radiation
is contained.
In addition to ultraviolet light, the high-energy bulbs
radiate heat. Therefore, a cooling system is
incorporated to take away the excess heat and
make sure that the bulbs and housings remain at
an acceptable operating temperature.
The unit is fitted with interlocks and safety faults
that prevent the operation of the system in an
unsafe condition and indicate any faults that might
occur on the front panel of the power supply.
Light shielding is required to ensure the stray UV
light and heat meet agreed safety criteria.
