The Bally Bend Tester is used to determine a material's resistance to cracking or other forms of failure at the bend fold. The method is suitable for all flexible materials, especially leather, coated fabrics and used textiles
WLiTextile Testing Instruments, Testing Equipment Manufacturer WLiTextile Testing Instruments, Testing Equipment Manufacturer Bally Leather Bend Test
WLiTextile Testing Instruments, Testing Equipment Manufacturer
r Fold the test piece in half and secure one end in the clamp. The test specimen is then turned over and the free end is secured in a second grip at an angle of 90 degrees to the first grip. The first grip bends the specimen at a certain speed through repeated oscillations of a field. The number of bending cycles was recorded at fixed intervals and the damage to the sample was visually assessed.
WLiTextile Testing Instruments, Testing Equipment Manufacturer WLiTextile Testing Instruments, Testing Equipment Manufacturer < >
bally flex The test can be performed under ambient conditions with wet or dry samples. WLiTextile Testing Instruments, Testing Equipment Manufacturer WLiTextile Testing Instruments, Testing Equipment Manufacturer 1. Dry test
WLiTextile Testing Instruments, Testing Equipment Manufacturer 1. Clamp the sample:
WLiTextile Testing Instruments, Testing Equipment Manufacturer 1.1 Turn the back button of the machine to put the upper armature in the horizontal position . WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
1.2 Fold the sample in half from the center of the longitudinal direction so that the test surface faces inward and the edges are aligned, as shown in Figure 5 . WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
1.3 Attach the top and bottom mounts, loosen the screws and place one end of the specimen in the top mount so that the folded line is aligned with the bottom line of the top fixture. Then tighten the set screw when the specimen reaches the top clamp set screw. WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
1.4 Fold the other end of the specimen down , cover the folded ring and hold it vertically as shown in Figure 6. WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
1.5 Next, insert the bottom of the specimen vertically into the bottom fixture (90 degreesn) and keep the fold line vertical. Before inserting, gently pull the test piece and tighten the set screw
WLiTextile Testing Instruments, Testing Equipment Manufacturer (straighten the test piece, no more force is needed)WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
1.6 After clamping the specimen, turn the rear knob to set the upper armature to the maximum bending angle, and the bending angle should be 22.5 ± 0.5.
WLiTextile Testing Instruments, Testing Equipment Manufacturer WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
2. Wet test
WLiTextile Testing Instruments, Testing Equipment Manufacturer 2.1 The sample The back (not used for the test) is turned on the workbench, use a straw to absorb distilled water to the back, and then use a glass rod to roll on it so that the water penetrates within 5 mm of the edge of the sample . Absorption takes about 1-2 minutes. WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
2.2The operation method of Bally leather material bending testing machine is carried out according to the dry test procedure.
WLiTextile Testing Instruments, Testing Equipment Manufacturer WLiTextile Testing Instruments, Testing Equipment Manufacturer 3. Note
WLiTextile Testing Instruments, Testing Equipment Manufacturer 1. If the bally test is loose, confirm itt test piece and check that the set screw is locked. WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
2. Do not overtighten the screws when clamping the specimen, so as not to damage the specimen when bending. WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
WLiTextile Testing Instruments, Testing Equipment Manufacturer
