Chapter 5
Maintenance and Repair Notes
Page 40 UFD Applicator, Manual 40-43, Rev. 6.16
5.7 Replacement of the UFD Nozzle
Heed all security advices given in Chapter 5.1.
Maintenance and repair work is only permitted for skilled personnel!
Always wear safety shoes, heat-resistant protective gloves, safety goggles
and protective clothing that cover all vulnerable parts of the body while
working on the heated unit! Risk of injury or severe burns!
Components and adhesive are hot. Take every precaution to prevent the
material and hot surfaces from contacting the skin.
During the purging procedure, hot adhesive can come out of the
Applicator under high pressure. Wear safety glasses, gloves and
Refer to the drawing in Chapter 7 for more information.
Occasionally nozzles can become clogged with char, residue or other foreign material.
This can result in the decrease or even stoppage of glue flow. Use following procedure to
change nozzles:
The nozzle must be at operating temperature when cleaned.
2. Switch the unit voltage-free and pressureless.
3. Guard the unit against unauthorized restarting.
4. Place a heat-resistant catchment
container/underlay under the Applicator. Hot
adhesive may come out!
5. Relieve the adhesive pressure by following the
instructions under Chapter 5.4 “Relieving
Adhesive Pressure”.
6. Remove the nozzle from the module by
loosening its two (or one on UFD Snuffback
Nozzle) mounting screws. See pictures on the
side.
7. Mount the nozzle in reverse order and attach it
to the module with a torque of 20-25 in./lbs
(2.3-2.8 Nm).
After finishing the maintenance or repair works:
Remove all materials and tools used during the repair or maintenance from the
workspace of the unit.
Connect the voltage supply and the compressed air supply. Heat the unit up. Wait until
all temperatures are within the tolerances and the adhesive in the tank is molten
completely.
Continue production.
Nozzle’s two
mounting screws
Nozzle’s one
mounting screw
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