A fiber insulation application nozzle having a small opening for
introducing insulation into cavities through a small opening is provided.
The diameter of the body portion of the nozzle corresponds with the
diameter of the conventional deliver hose from an insulation blowing
machine. The nozzle includes a reducing section tapering to an exit
portion having a diameter one-third of the main body. A gas injector tube
is introduced along the inside surface of the exit portion of the nozzle
and is directed along the surface. Fiber insulation in the nozzle is
compressed prior to entering the exit portion. The gas injected into the
exit portion aids in moving the particles through the nozzle. The
compressed fibers are surrounded by high pressure gas and are caused to
expand into a fluffed condition upon leaving the nozzle. An impinging
stream of liquid adhesive is provided within the exit portion of the
nozzle so as to thoroughly wet and coat the insulation fibers within the
nozzle as they exit the nozzle. As the fibers expand and fill the cavity
in the fluffed condition the adhesive sets forming a rigid mass of
insulation. Wedge shaped ramps can be provided within the nozzle so as to
produce a turbulent flow within the nozzle. Adhesive spray nozzles can be
mounted on the exterior side of the nozzle so that the applying surface
will be wetted prior to the depositing of the wetted fibers.