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Method of determining cord hardness and testing stand

A technology for testing racks and cords, which is applied in the direction of applying stable tension/pressure to test the strength of materials, etc., which can solve the problems that easily cause disputes, cannot quantitatively reflect the actual level of cord hardness, etc., and achieve the test conditions and simple operation process Effect

Inactive Publication Date: 2004-10-06
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there is no suitable method for testing hardness in China, cord fabric factories and tire factories can only judge by sensory perception, which cannot quantitatively reflect the actual level of cord hardness, and it is easy to cause disputes in business activities

Method used

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  • Method of determining cord hardness and testing stand

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The following is a detailed description of the measurement process for measuring the hardness of the dipped cord: choose a 50N sensor, install the special hardness test frame on the upper and lower fixtures of the strength machine, and set the parameters of the strength machine as: speed 50mm / min, and then cut 2CM One long 930dtex / 2 nylon 6 dipped cord, put the cord lightly on the hole of plate 3, and pass through the center of the wire hook vertically at the same time, then start the power machine to draw down, wait for the power machine After the drafting is reset, the maximum drafting force, which is the hardness of the cord, is read out on the display of the strength machine.

Embodiment 2

[0013] The special test stand used in the present invention is composed of two square flat plates 1 and 3 with round holes and their four supporting columns 2 and metal wires 4. The square plates 1 and 3 and their four supporting columns 2 are connected with an adhesive material. into a dedicated test stand.

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PUM

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Abstract

A method for testing the hardness of cord thread includes installing the cord thread onto special testier, applying 10-1000 N of tension to it at speed of 20-500 mm / min, and directly reading the maxinal draft force which is just the hardness of cord thread.

Description

technical field [0001] The invention relates to a method and a test frame for measuring the hardness of cords, which are suitable for measuring the hardness of various types of dipped cords. Background technique [0002] Hardness is an important parameter to measure the fatigue resistance and post-processing performance of the cord. The hardness is small, and the fatigue resistance and post-processing performance of the cord are relatively good. [0003] With the progress of tire production technology and the continuous improvement of enterprises' pursuit of product quality, the hardness of the cord has attracted great attention in related industries. In order to improve the competitiveness of products, domestic cord fabric factories are trying to find various methods to reduce the hardness of cord fabrics. Tire manufacturers also want to put forward requirements on the hardness of the cord in order to produce better tire products. However, since there is currently no sui...

Claims

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Application Information

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IPC IPC(8): G01N3/08
Inventor 何宁艳
Owner CHINA PETROLEUM & CHEM CORP
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