- Civil Lab Mechanical Lab Engineering Lab Equipments
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CAT NO: DIDACTICNLE-Export-320004
Collapse Tester.
Collapse Tester -
Paper tubes used for winding yarn, shall have adequate mechanical
strength. One of the tests used for ascertaining the mechanical strength
of paper tubes is the collapse test. In this test, a test specimen
taken from the sample of paper tube is placed on a rigid flat metallic
plate and pressed against another rigid flat metallic plate. The maximum
force required to collapse the tube is then measured.
The Collapse Tester for Paper Tubes
consists of a rigid platform for placing the test specimen on, an
arrangement for compressing the specimen with the help of a manually
operated hydraulic jack and measurement of maximum force with the help
of calibrated pressure gauge with a dummy pointer.
The test
specimen is placed on a flat steel platform and a moving flat rigid
plate is lowered on it with the help of a hand wheel and screw
arrangement so that it just touches the top of the sample. The load is
then applied by a manually operated hydraulic jack placed below the
lower plate, which lifts the lower plate to compress the specimen
against the upper plate. The hydraulic pressure in the jack which is
proportional to force on the specimen is measured on a pressure gauge
with a dummy pointer to record the maximum pressure corresponds to
collapse strength of the tube. The collapse strength is then determined
in force unit with the help of calibration certificate for the pressure
gauge provided with the equipment.
Two pressure gauges are fitted
to the equipment, one for measuring low force and the other for
measuring high force. An isolating valve is also provided on the low
range pressure gauge for its safety to isolate it while conducting test
on the high range pressure gauge.
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