Device and method for testing bending properties of monofilament

Abstract

The invention relates to a device for testing bending properties of a monofilament. The device comprises a rack, wherein the rack is provided with a groove perpendicular to a horizontal plane; a platform is arranged in the groove; a test sample fixing mold is mounted on the platform; a presser foot is fixed above the groove and connected with a pressure sensor; when the platform moves up along the groove, the highest arch point of a test sample fixed on the test sample fixing mold is in contact extrusion with the presser foot to ensure that the pressure sensor measures a pressure; the pressure sensor is connected with a computer, and the computer is connected with the platform through an alternating current servo driving system. The invention also relates to a test method of the test device. The device and the method provided by the invention have the advantages of straight and accurate data, reasonable and easily-operated method, and wide test objects.

Description

technical field [0001] The invention relates to the technical field of textile precision measuring instruments, in particular to a monofilament bending performance testing device and method. Background technique [0002] With the in-depth and extensive application of monofilament in civil fields, such as wedding dresses, evening dresses, knitted fabrics, and industrial webbing, printing screens, filter materials, and pipe network weaving, the bending performance of monofilaments is used to measure the wearability of products. However, it has not been paid enough attention by people, and there is also a lack of uniform testing standards. Some methods that can be seen in the current reports, such as the "four-point bending method", that is, hold both ends, apply an equal load at the two third points in the middle, and calculate the bending stiffness through the fracture strength of the sample. However, this method The actual operation is relatively complicated, so it is rarel...

AI Technical Summary

Problems solved by technology

Some methods that can be seen in the current reports, such as the "four-point bending method", that is, hold both ends, apply an equal load at the two third points in the middle, and calculate the bending stiffness through the fracture strength of the sample. However, this method The actual operation is relatively complicated, so it is rarely used; there is also the "cantilever beam method", that is, one end of the sample is held to apply a load to the other end, and the force value is measured with a torsion balance. Constantly changing, so the accuracy is not high; In addition, the "circle-shaped ring hanging weight method", the sample is made into a ring and hung on the fulcrum, and a certain quality of the floating code is hung at the lower end, which is calculated by measuring the sag of the ring after stabilization Bending stiffness, because the self-weight has a great influence on the measurement results in this method, so the error is also large

In short, the above methods cannot effectively reflect the bending performance of monofilaments.

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