news
Bally Leather Flexing Tester Can Be Carried Out With Wet Or Dry Test Jul 04, 2022
This Bally resistance flexing tester is used to determine the resistance of a material to cracking or other types of falure at flexing creases.The method is applicable to all flexible materials and in particular leathers, coated fabrics and textiles used in footwear uppers.

Bally leather flexing tester test specimen is folded in half then one end is secured in a clamp.The test specimen is then turned inside out andthe free end secured in a second clamp at 90 degrees to the first.The first clamp is repeatedly oscillated through a fied angle at a defined ratecausing the test specimen to flex.At set intervals the number of fexing cycles is recorded and the damage to the test specimen is visually assessed.

The bally flex test can be carried out with wet or dry test specimens at ambient.

1. Dry test
1.Clamp the specimen:

1.1 Twiddle the back button of the machine,and adjust the upper jig to the horizontal position.


1.2 Fold up the specimen from the middle in the length direction, making the testing side inwards and the edge aligned, as fig.5 shows.


1.3 Fixed the upper jig and lower jig and Loosen the screw, then put one end of the specimen into the upper jig to make the folding line flush with the bottom line of the upper jig. Then lock the set screws when the specimen reaches the set crews of the upper jig.


Bally leather flexing tester


1.4 Fold down the other end of the specimen, cover the folding ling and keep vertical, as FIG 6 shows.


1.5 Then vertically insert the bottom of the specimen into the lower jig(90 degree)and keep the folding line vertical.Before insertion gently pull the specimen and lock the set screws

(just straight the specimen, and don't have to exert a greater force)


1.6 After Clamping the specimen, turn the back knob to adjust the upper jig to the maximum bending angle, and the bending angle should be 22.5±0.5.


Bally resistance flexing tester


2. Wet test

2.1 Turn up the reverse side(not used for testing) of the specimen on the table, draw distilled water to the reverse side with the straw and then roll on it with glass rod to make water infiltrate the specimen edge within 5mm. And the absorption lasts about 1-2 minutes.


2.2 The bally flex tester for leather materials operation method is in accordance with the dry test procedure.

3. Attention

1. In case of looseness while bally test, confirm whether the set screws are locked after fixing the specimen.


2. Don't lock the screws too tight when clamping the specimen, so as to avoid damaging the specimen while bending.


Bally resistance flexing tester

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Home

Products

whatsapp