ALTANA Mandrel Set - Manual (Page 5)

4
Operation
A mandrel rod is simply placed in position in cuts
at the top of the frame and then the test panel is
folded tightly around the rod, coated face upward
and outward. The coating may be examined
for cracking, fl aking and other types of damage
caused by elongation. Various samples may be
bent on one specifi ed rod as a standard „pass or
fail“ test or rods of decreasing diameter may be
used with one type of test coating to learn what
degree of elongation fi rst produces failures in the
coating. Whatever approach is used, the Mandrel
Set will continue to yield useful and accurate data
as long as the rods are not bent by attempting to
fold heavier gage panels around them.
Operation