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2023-03-09 0 Views

What should be considered when performing tensile tests on rubber products?

The rubber tensile machine, tensile testing machine, universal materials testing machine, and other testing instruments manufactured by National Instruments stretch, bend, compress, or puncture rubber strips at a specified rate until they break. They are the most common instruments in rubber manufacturers' laboratories. These rubber manufacturers use electronic traction machines during compound development to determine a material's suitability for a process or end use.
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Rubber traction machines, rubber tensile testing machines, rubber testing equipment, etc. Laboratories in various industries. The reason is that they are used more and more in the development of innovative products and processes, another reason is that the country now has stricter quality control for incoming materials and finished products and the related standards have also risen sharply. Many OEMs, especially in the areas of Mmedical or automotive, require rubber processors to conduct their own testing at the end of a production run. Another reason for internal testing is to improve process control, which can reduce scrap rates and effectively improve the quality of current products.
Tensile testing machine consisting of a single (single arm) or two (double column) vertical supporting columns mounted on a fixed horizontal base plate and topped by a moveable horizontal beam. On most electronic tensile testing machines today, the strut is typically driven by a lead screw to determine the position of the moving beam.
The measuring range of the rubber tension tester is determined by both the maximum load that the frame can support and the maximum load on the bearing unit. The charging unit is mounted on a movable beam powered by an electric motoror oil pressure is driven. A load cell attached to the device measures the force and can display the readings on an LCD screen or computer. Many electronic traction machines have interchangeable transducers to suit the material being tested.
To deform the rubber, the electronic tenter applies a force to the template. Specific tensile, flexure, compression, or shear tests are classified according to the direction in which strain is applied to the specimen and the rate at which the force is applied. The basic test is carried out with a commercially available electromechanical traction machine. They are typically loaded in the speed range of 0.1mm/min to 500mm/min and different materials require different test speeds. Dynamic and cyclic tests such as fracture growth and fatigue are typically performed on servo-hydraulic electronic traction machines with low loadsloads carried out over a long period of time.
Early tensile testing machines had pointers and chart recorders. Today they have been replaced by numerical control and computer software. The new controller can test and display the corresponding data automatically, even the stress-strain curve can be displayed in real time during the test. The effort for your own calculation is reduced and efficiency is significantly improved.
Rubber Tester, Rubber Tensile Machine, The most common test for rubber is tensile strength and flexural strength. For tensile tests according to ASTM D638 and ISO527, both ends of the specimen are clamped. One clamp is fixed, the other in the carrier, loosen from the fixed clamp, pull, hold the sample until it breaks, after which the beam will stop automatically. Place the bend test specimen (ASTMD790, D6272 and ISO178) on the two supports on the fixed base of the testing machine. For this test, the bar is moved in the opposite directionung to that used for tensile testing, pushing rather than pulling on the unsupported center of the sample until it flexes and possibly breaks. Because many rubbers in China do not break in this test, according to the standard test method, it is necessary to calculate the bending stress when the deflection reaches 1.5 times the thickness. The most commonly used is the bending deflection of 6mm for 4mm thick sample .
How the specimen is mounted in the fixture of the testing machine and whether it is clamped is very important as different types of tests require different fixtures. Not only is changing fixtures difficult to maintain consistency of position (which often affects the accuracy of test results), but it's also easy to accidentally damage the sensitive part -- the sensor operator, and many women find it so difficult to complete this work. Over and beyondthe price of the device is several hundred yuan, and there are also pneumatic devices, but it will be thousands of yuan more expensive. Therefore, try to change the lamp as little as possible to avoid unnecessary costs. Some electronic tractors, such as B. universal material testing machines are designed together with three-point bending devices and pulling devices, which reduces the process of changing devices.

The above points to remember when conducting tensile testing on rubber products were compiled by the editor of National Instruments. 39JTextile Testing Instruments, Testing Equipment Manufacturer

39JTextile Testing Instruments, Testing Equipment Manufacturer

39JTextile Testing Instruments, Testing Equipment Manufacturer

Wuhan Guoliang Instrument is a tensile testing machine manufacturer that specializes in producing electronic tensile testing machine, universal tensile testing machine and others Testing instruments Testing materials include: rubber, plastic, metal, geotextile, etc. Welcome to the consultation!39JTextile Testing Instruments, Testing Equipment Manufacturer