Description
2-2
Part 1089210A04
E 2010 Nordson Corporation
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.
System Components
Refer to Table 2-1 and Figure 2-1 for a description of the system
components.
Table 2-1 System Components
Item Component Description
1 Lamphead The lamphead consists of a bulb housing, UV bulb, wave guide,
reflectors, pressure and temperature sensors, starter bulb, and the
magnetron assembly. The patented wave guide also couples RF
energy to the bulb and provides cooling for the bulb. The lamphead
reflects the emitted UV light onto the substrate.
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 mercury bulbs. The bulbs consist
of high-purity quartz and have various fills (including doped spectrally
enhanced metal halide) 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 control or overheat the reflec-
tor system.
3 Reflectors Refer to Reflectors on page 2-4 for more information. Elliptical
shaped focus reflectors are used to guide the UV light in a tight band
across the surface of the material being cured. The reflectors are
manufactured from glass with a proprietary coating to give maximum
UV reflectivity while minimizing infrared radiation.
NOTE: A wider band of light can be produced by using optional flood
reflectors.
4 Starter Bulb The 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
Transducer
Monitors the lamphead cooling and shuts down system power in the
event of a cooling failure to prevent a catastrophic failure.
Monitors the light from the lamphead bulb and shuts the system down
if the bulb fails to emit enough light.
6 Magnetrons The magnetrons are 3 kW, 2450 MHz frequency generators that
convert high voltage electrical inputs to RF energy. The wave guide
cavity is designed to direct the RF energy into the UV bulb, thus
exciting a UV emitting plasma within the bulb.
To Next Page
Loading...