page 9
Setting-up Top-loading
(if required)
Operation of Mounting
Tables
Some testing applications require torque to be measured
while axial top-load is being applied to the specimen.
Testing a ‘push-and-twist’ child-resistant closure according
to ASTM D3475 would be one example of such an
application.
Attach top fixture to sample ensuring central adjuster knob
(C) (page 10) is loosened. Add appropriate weight(s), up to
5kg, into the loading dish (A) (page 10). The test may now
be performed.
Do not re-tighten the central adjuster knob.
The upper and lower mounting tables have been designed
to accommodate samples in a wide range of sizes, shapes
and symmetries. It is however necessary to avoid
over-tightening these fixtures such that the cap sample is
distorted significantly. Optimum results can be obtained for
critical applications by using a mandrel dedicated for use
with each particular design of cap, see (a) for example.
