Jinan Wang Te Bei Equipment Co., Ltd.
Jinan Wangtebei Instrument and Equipment Co., Ltd. supply most competitive and suitable test solutions
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rubber low temperature brittleness tester
Single sample method rubber low temperature impact tester, rubber low temperature brittleness tester, low temperature brittleness tester technical parameters:
1. Test temperature and time: -70 degrees (normally more than 1 hour)
2. Impact speed: 2m/s±0.2m/s
3. After the constant temperature, the temperature fluctuation during the test within 3 minutes: <±0.5°C fluctuation is small, and the temperature control is more accurate.
4. Distance from the center of the impactor to the lower end of the holder: 11±0.5mm
5, size: 900 × 500 × 850 studio size: 240 × 170 × 150 (length × width × height)
6, power: 800W
The low-temperature impact tester is a temperature at which the sample is damaged by impact under the specified conditions, that is, the brittleness temperature, and the performance of the plastic and other elastic materials under low temperature conditions can be comparatively identified. It can measure the brittleness temperature and low temperature performance of vulcanized rubber of different rubber materials or different formulations. Therefore, it is indispensable in the quality inspection of scientific research materials and their products, and the control of production processes. The instrument is designed according to GB1682 national standard. The technical indicators meet the requirements of HG 2-162-1965 plastic low temperature impact compression test method and GB5470-2008 plastic impact embrittlement temperature test method.
Single sample method rubber low temperature impact tester, rubber low temperature brittleness tester, low temperature brittleness tester structure principle:
Lifting clamp
The lift gripper consists of a cylinder with a gripper and a cylinder block.
The distance from the impact portion of the sample to the lower end of the holder was 11.0 ± 0.5 mm.
2. Impact device
The impact device consists of an impactor and an impact cylinder.
3. Impactor
The shape and size of the impactor head are shown as objects. The impactor has a weight of 200 ± 20 g and a working stroke of 40 ± 1 mm. When the impact cylinder is in the reset state, the distance from the end of the impactor to the sample is 25±1 mm.
4. Freezing medium: industrial ethanol
5. The measuring instrument is directly cooled by a compressor. It is not necessary to cool the circulating water.
Single sample method rubber low temperature impact tester, rubber low temperature brittleness tester, low temperature brittleness tester test standard:
specification
The sample has a length of 25.0 ± 0.5 mm, a width of 6.0 ± 0.5 mm, and a thickness of 2.0 ± 0.3 mm. 5.2 requirements
The surface of the sample should be smooth and free of foreign matter and damage. The finished product should be ground to the appropriate size.
Single sample method rubber low temperature impact tester, rubber low temperature brittleness tester, low temperature brittleness tester Note:
The cylinder pressure has been adjusted before leaving the factory and cannot be changed arbitrarily.
Single sample method rubber low temperature impact tester, rubber low temperature brittleness tester, low temperature brittleness tester use method:
1. Turn on the power and the temperature controller and timer display lights.
2. Inject cold medium (usually industrial ethanol) into the cold well, and the injection amount should ensure that the distance from the lower end of the holder to the liquid surface is 75±10mm.
3. Hold the specimen vertically on the holder. The clip should not be too tight or too loose to prevent the sample from deforming or falling off.
4. After reaching the test temperature, press the start button, the test machine will work automatically (press the gripper, start freezing the sample, start the timing control switch or press the stopwatch. The sample freezing time is specified as 3.0±0.5min. During the freezing of the sample, the temperature fluctuation of the freezing medium shall not exceed ±1 °C)
5. Remove the sample, bend the sample to 180° in the direction of impact, and carefully observe for damage.
6. After the sample is impacted (only one impact per sample), if there is damage, the temperature of the freezing medium should be increased, otherwise the temperature will be lowered and the test will continue.
7. Temperature adjustment method: a, press the set button, the temperature controller enters the setting state
b. Press the “<” button to move to the position you want to set.
c. Press the “∧” button to adjust the temperature.
d, press the "set" button to confirm
Through trial and error, the temperature at which at least two samples are not destroyed and the temperature at which at least one sample is destroyed are determined. If the two results differ by no more than 1 ° C, the test is completed.