ICAD technology, the process runs
with high gloss stability. Also, the low
running temperature prevents issues
with edgeband glue melting, which can
otherwise be a problem.
Energy efficiency is a major requirement for any modern installation. According to Efsen’s calculations, 55 percent energy saving could be realized by
selecting UV-LED systems rather than
conventional mercury-based systems.
In addition, the long life and reduced
maintenance required with UV-LED
systems helps to maximize the uptime
of the production line.
In addition to the LED systems,
Efsen’s conventional UV lamp system,
the WoodCure, provides guided cooling and superior temperature control,
according to the company. In combination with new technology reflectors
and power supplies, they provide a
high intensity and a maximized lifetime. These systems are using reflector
cassettes that allow for a quick and
convenient cleaning and bulb change.
But even after ensuring that the
chemistry and the light sources work
in synergy, fulfilling the application
requirement, LED curing presents
a challenge to overcome in order to
ensure long term process stability.
UV-LEDs, in contrast to conventional UV systems, consist of thousands
of individual light sources and each of
them is slightly different. Measuring
the light source at a few defined positions, as it is being done at conventional light sources, will not give the
required process security.
During the lifetime of the LED, a
deviation will occur, such as a defect
segment, damaged optics or dirt on
the lens that would have a negative
impact on the output and cure. If this
would happen in a position away from
the measuring point, it would not be
recognized in a normal measurement.
Even if UV-LEDs lasts longer than
mercury-based UV lamps, they still
age, and will lose power over their life-
time. Efsen dealt with this process sta-
bility issue with the proprietary ICAD
inline process control which is integral
part of all Efsen UV-LED products.
ICAD is an inline control that is
continuously measuring the UV output
of the lamp across the width of the
whole line. It recognizes deviations of
the emitted UV power and is automati-
cally adjusting the individual UV LED
arrays to produce a homogeneous
UV-distribution over the whole width
of the UV LED system.
SC Freda decided to choose Efsen’s
W-LED systems incorporating ICAD.
The W-LED includes power supplies,
PLC control and cooling air supply.
No external electrical cabinets are
The integrated cooling air blowers
forward filtered cooling air to the LED
modules, important inside a wood
The W-LED comes with optional
electrical height adjustment, sensors
that activate the W-LED when a prod-
uct arrives, and safety sensors to deac-
tivate the conveyor in case a bended
part is getting stuck.
The W-LED, with integrated UV-
LED modules, and ICAD measuring
system provides a system with complete
UV control. See www.Efsen.dk ✚
SC Freda expanded with a new production operation, featuring a high-speed production line
with UV curing. (Photos and illustrations from Efsen)