Product manual

Description
2-2
Part 1105120-01
E 2013 Nordson Corporation
In addition to ultraviolet light, the UV bulbs radiate heat. A constant flow of
cooling air through the lamphead is required to remove the excess heat and
make sure that the bulbs, reflectors, and housings remain at an acceptable
operating temperature. Two versions of the lamphead are available: with an
internal blower, or with a duct connection to a customer-supplied external
blower.
The system controller supplies and controls the high voltage to the
lamphead and provides a control circuit to interlock the lamphead with the
curing machine. The unit is fitted with additional interlocks and safety
features that prevent the operation of the system in an unsafe condition.
The front panel of the controller displays operating and fault messages.
System Components
Table 2-1 and Figure 2-1 describe and illustrate the major components of a
typical CoolWave ultraviolet microwave curing system. Your system may
appear different depending on your application requirements.
Table 2-1 System Components
Item Component Description
1 Lamphead The lamphead consists of a bulb housing, UV bulb, starter bulb,
reflectors, wave guide, magnetron and filament transformer assembly,
and a circuit board incorporating a light detector, temperature sensor,
and pressure sensor. The patented wave guide couples the
magnetron output to the bulb. Lampheads are available in internal and
external blower versions.
2 Ultraviolet Bulbs
NOTE: The system warranty is void if genuine Nordson UV bulbs are
not used. Contact a Nordson UV representative for ordering
information.
The system uses medium-pressure bulbs. The bulbs consist of
high-purity quartz and have various fills to produce light at different
wavelengths. Bulbs and controls are carefully matched to give
optimum UV output and wavelength requirements.
Use genuine Nordson replacement bulbs with this system.
Alternative bulbs may damage the controls or overheat the
reflector system.
3 Reflectors Refer to Reflectors on page 2-5 for more information. Reflectors can
be ordered to suit the application. Focus reflectors are elliptical in
shape to guide the UV light into a tight band across the surface of the
material being cured. Flood reflectors produce a wider band of light.
The reflectors are manufactured from glass with a proprietary coating
to give maximum UV reflectivity while minimizing infrared radiation.
4 Starter Bulb Acts as the ignitor for the ultraviolet bulb. The starter bulb lights at the
same time the magnetron is energized. After the UV bulb reaches full
power the starter bulb turns off automatically.
5 Light
Detector/Pressure
/Temperature
Board
Monitors UV light and shuts the system down if the bulb fails to emit
enough light. Includes a pressure transducer that monitors the
lamphead cooling air pressure and shuts off system power if the
cooling system fails to prevent a catastrophic lamphead failure.
Monitors temperature inside the lamphead and shuts down the system
if the internal temperature goes over the limit.