Working principle of pinch fold tester

The pinch fold tester evaluates the folding resistance of the material by applying force to repeatedly bend the material and observing the deformation of the material. During the test, the flexible circuit board is placed in the clamping device of the test machine and then driven by a motor or other means to fold it repeatedly at a certain angle until the material breaks or reaches the preset number of folds.

Clamping system: used to clamp the sample to ensure that the sample will not loosen or slip during the folding process. The design of the clamping system should ensure that the sample can be evenly stressed and can adapt to samples of different thicknesses and widths.

Folding mechanism: composed of a folding head and a drive device, used to achieve repeated folding of the sample. The angle and folding speed of the folding head should meet the requirements of relevant standards to ensure the accuracy and comparability of the test results.

Force application device: used to apply a certain tension or pressure to the sample to simulate the stress during actual use. This usually consists of components such as springs, tension adjustment knobs, and pressure sensors.

Control system: used to control the operation of the test machine, including start, stop, folding speed adjustment, tension adjustment, and other functions. The control system can be manually controlled or automatically controlled and can be selected according to the needs of the user.

Test preparation: Place the specimen in the clamping device of the test machine according to the specified size and shape. Adjust the parameters of the clamping system, folding mechanism, force application device, and other components to adapt to the characteristics of the specimen and the test requirements.

Test start: Start the test machine, so that the clamping system starts to move, and the specimen begins to fold repeatedly under the action of the folding mechanism. The force application device monitors and records the tension or pressure of the specimen.

Test end: After stopping the operation, the degree of damage to the material can be observed.

Data analysis: According to the test data and the characteristics of the specimen, the folding resistance of the specimen can be evaluated. Generally, the more folds and the greater the tension or pressure before breaking, the better the folding resistance of the specimen.

pinch fold testers are widely used in the automotive industry to evaluate the folding resistance of materials such as flexible circuit boards and wires.

The material is repeatedly folded during actual use to evaluate its folding resistance. Its working principle is simple and clear, and the test results are accurate and reliable, providing important quality control and R&D support for the automotive industry.