Cardboard bending tester - technical literature

Cardboard folding tester - technical literature folding resistance refers to the number of times that paper or cardboard can withstand a reciprocating of 135 ° under a certain tension, and the number of double folds of the previous folding or the number of double folds based on 10 is expressed
in the value of the number of double folds based on 10.

Test steps: calibrate the instrument level, adjust the required spring tension and fix it
.

The 9.
81 N spring tension is selected for routine testing, and the 4.
91 N or 14.
72N spring tension
can also be used according to the requirements.

Select the folding chuck required for specimen thickness
.

Clamp the specimen vertically between the two clamps of the folding head, loosen the spring fixing screw, observe whether the spring tension pointer is in the desired position, and readjust
if there is a bit difference.

Start the instrument and begin to fold back and forth until the specimen breaks
.

It should be noted that half of the specimen is folded to the front first, and half of the specimen is folded
to the reverse first.

Reads the indicated value
of the counter when breaking.

The counter clears zero for the next test
.

Repeat the above test procedure, 10 specimens
in each direction.

Calculate the average of the number of dips for each measured value or the average of the pair of halves with 10 as the base
bifold.

Technical parameters Measuring range 1~ 99999 times Folding angle 135 ° ±2° Folding speed 175±10 times / min Tension adjustment range 4.
91N ~ 14.
72N, per addition of 9.
81N tension, spring compression at least 17mm Gap distance 0.
25, 0.
50, 0.
75, 1.
00mm specimen thickness ≤1 mm Folding head width 19±1mm, folding radius 0.
38±0.
02mm Dimensions 305mmX380mmX420mm (length, width and height) Weight 22kg Working temperature 15°C-35°C Relative humidity 70%, non-condensing working power supply 220V 50Hz Cardboard folding resistance tester - technical literature