3M Scotch-Weld Owner's Manual - General Information
General Information
© 3M 2006
3
The 3M™ Scotch-Weld™ Hot Melt Applicator PG II
is designed to be a simple, reliable tool for
dispensing 3M™ Scotch-Weld™ Hot Melt Adhesive
Sticks. It is self-contained and hand held, designed
for multi-station or intermittent manual adhesive
application.
The 3M Scotch-Weld Hot Melt Applicator PG II uses
electric heat to melt the adhesive, and air pressure to
deliver the adhesive. Adhesive temperature is
automatically maintained by a fixed thermostat on the
heat block. The system is further protected by a
thermal cutout (TCO), which acts as a thermal fuse.
When trigger (1) is pulled, the variable regulator (2)
allows air pressure into rear of the Speedloader stick
feed (3). Air pushes the piston (4), which advances
adhesive stick through the applicator. As adhesive
advances, it passes through hard plastic insulating
sleeve (5) which acts as thermal barrier to keep
molten adhesive and heat in forward portion of the
applicator. The rest of the applicator stays cool.
As adhesive advances into the heat block, it is melted
and liquified. With pressure from the solid adhesive
sticks and the piston, the liquid adhesive is forced out
the tip of the applicator through the nozzle valve (6).
When the trigger is released, air pressure is released
from the rear of the loading chamber. Pressure on the
molten adhesive in the front of the applicator is then
also relieved. Spring tension in the nozzle valve
retracts the valve, neatly cutting off the adhesive
flow. The trigger of the 3M Scotch-Weld Hot Melt
Applicator PG II can be feathered. The operator can
pull the trigger back part way for a small amount of
adhesive or pull the trigger back all the way for
maximum flow.
The delivery rate of molten adhesive for the 3M
Scotch-Weld Hot Melt Applicator PG II is seven
pounds per hour with a product like 3M™ Scotch-
Weld™ Hot Melt Adhesive 3738 utilizing the
standard tip 9921. Adhesive flow rates will vary with
the different adhesives in the line and the nozzle tip
you choose.
READ INSTRUCTIONS THOROUGHLY BEFORE OPERATING OR
PERFORMING ANY MAINTANCE ON 3M SCOTCH-WELD HOT MELT
APPLICATOR PG II.