Description
2-1
Part 1089210A04
E 2010 Nordson Corporation
Section 2
Description
Introduction
The CoolWave 2 Ultraviolet Microwave-Applied Curing System consists of a
MPS2-410 power supply and a CW2-410 lamphead. The power supply unit
provides the high voltage supply 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 variable output power supply, and an RF
detector. Additional lampheads can be lined up end-to-end to form longer
curing widths.
Table 2-1 and Figure 2-1 describe and illustrate the major components of a
typical 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.
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