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fifteen billion six hundred and twenty-one million eight hundred and seventy-eight thousand nine hundred and thirty-five

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 Rubber low temperature brittleness tester

Rubber low temperature brittleness tester

Product brand: Rubber low temperature brittleness tester

Classification: Rubber low temperature brittleness tester

Rubber low temperature brittleness testing machine, also known as rubber low temperature brittleness impact tester, brittleness temperature tester. The performance of rubber, non hard plastics and other elastic materials at low temperature can be compared. It can be measured

  • Hotline: fifteen billion six hundred and twenty-one million eight hundred and seventy-eight thousand nine hundred and thirty-five
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A practical and efficient rubber low temperature brittleness tester is recommended, which is also called rubber low temperature brittleness impact tester and brittleness temperature tester. The performance of non rigid plastics and other elastic materials at low temperature can be compared. The brittleness temperature and low temperature properties of vulcanized rubber with different rubber materials or formulations can be measured.
1、 Application of rubber low temperature brittleness tester
Rubber low temperature brittleness testing machine is used to measure the highest temperature of vulcanized rubber when it is damaged by impact under specified conditions, that is, brittleness temperature. It can be used to compare the performance of non hard plastics and other elastic materials at low temperature. The brittleness temperature and low temperature properties of vulcanized rubber with different rubber materials or formulations can be measured. Therefore, it is indispensable for scientific research on the quality inspection of materials and their products and the control of production process. This instrument is designed according to the national standard GB / T 15256-2014 "determination of low temperature brittleness of vulcanized rubber (multi sample method)". It is a newly developed compressor refrigeration equipment. This equipment adopts the refrigeration technology of cascade compressor, uses the principle of heat balance and circulation stirring mode to achieve the automatic uniform cooling and constant temperature of the sample, and can fully meet the temperature control indexes specified in the national standard GB / t229-2007.
2、 Technical parameters of rubber low temperature brittleness tester
1. Temperature control range: - 80 ℃ (room temperature ≤ 25 ℃)
2. Cooling rate: 0 ℃ ~ - 20 ℃ 1.2 ℃ / min
-20℃ ~ -30℃       1.0℃/min
-30℃ ~ -60℃       0.7℃/min
-40 ℃ ~ - 60 ℃, about 0.7 ℃ / min
-60 ℃ ~ - 80 ℃, about 0.5 ℃ / min
Note: the operating environment is used at room temperature (23-25 ℃), and the side door can be fully opened to maintain the effect of compressor temperature dispersion.
3. After constant temperature, the temperature fluctuation within 3 min of the test is less than ± 0.5 ℃
4. Maximum dimension: 905×510×870 Mm (L × h × w)
5. Working room dimension: 268 × 158 × 150mm (length × height × width)
6. No freezing medium: ethanol or other cooling liquid
7. Mixing motor: 15W
8. Working power supply: 220 V ~ 240 V, 50 Hz, 2 kW
3、 Structure principle of rubber low temperature brittleness tester
3. The cooling system of the main engine is composed of an automatic cooling system and a cooling system. After starting the refrigeration switch, the compressor starts to work, and the refrigeration system enters the formal working state. The refrigeration compressor works continuously. When the temperature is close to the set temperature, the heating device in the cooling tank starts to provide heat in proportion to balance the excess cooling produced by the refrigeration system, so as to achieve the purpose of constant temperature. Stirring can make the cooling medium in the cooling tank circulate continuously and make the temperature uniform.
3.2 specimen holder of low temperature brittle impact tester
At most 5 specimens can be clamped each time, generally no more than 4 samples.
3.3 impact device
The impact device consists of an impact hammer and a self-locking mechanism.
3.4 impactor
The radius of impact head is 1.6 ± 0.1 mm;
The gap between impact head and specimen holder is 6.4 ± 0.3mm;
The distance between the center line of the impact head and the specimen holder is 8 ± 0.3 mm.
4、 Application of rubber low temperature brittleness tester
4.1 inject the frozen medium (generally industrial ethanol) into the cold well, and the injection amount should ensure that the distance between the lower end of the gripper and the liquid level is 75 ± 10 mm.
4.2 turn on the power, the temperature controller and timer display lights.
4.3 clamp the specimen vertically on the holder. The clamp should not be too tight or too loose to prevent the specimen from deformation or falling off.
(4) press the freezing timer to start the test. The freezing time of the sample is 5.0 ± 0.5min. During the freezing period, the temperature fluctuation of freezing medium shall not exceed ± 1 ℃
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