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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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Current location: homepage > Product Center > Low temperature tank impact test > Rubber low temperature brittleness tester >Low temperature brittleness testing machine for plastic rubber (single sample method)
 Low temperature brittleness testing machine for plastic rubber (single sample method)

Low temperature brittleness testing machine for plastic rubber (single sample method)

Product brand: Rubber low temperature brittleness tester

Classification: Rubber low temperature brittleness tester

Rubber low temperature brittleness testing machine, also known as rubber and plastic brittleness temperature tester, measures the highest temperature of vulcanized rubber when the sample is damaged by impact under specified conditions, that is, the brittleness temperature, which can be used to make plastics and other elastic materials under low temperature conditions

  • Hotline: fifteen billion six hundred and twenty-one million eight hundred and seventy-eight thousand nine hundred and thirty-five
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Plastic rubber low temperature brittleness testing machine, also known as rubber and plastic brittleness temperature tester, measures the highest temperature of vulcanized rubber when the sample is damaged by impact under specified conditions, which is the brittleness temperature. It can be used to compare the performance of 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. Please contact 15621878935 for details.
1、 Features and uses:
It is necessary for the quality inspection of rubber, plastics and other elastic materials in the production process control. All technical indexes of the instrument meet the requirements of GB / T 1682-2014 single sample method for low temperature brittleness of vulcanized rubber and other national standards. This instrument adopts imported cascade compressor for refrigeration. In the original design, a cold well agitator is added. Using the principle of balanced mixing, the temperature around the container is more uniform, the temperature drops faster, the time is saved and the energy consumption is reduced.  
2、 Technical parameters:
Model: cdwc-70
1. Test temperature: - 70 ℃ - 0 ℃
2. Impact velocity: 2m / s ± 0.2m/s
3. After constant temperature, the temperature fluctuation within 3 min of the test is less than ± 0.5 ℃
4. Distance from impactor center to lower end of gripper: 11 ± 0.5mm
5. Dimension: 720 × 700 × 138mm
6. Power: 1100W
7. Cold well volume: 3L
3、 Structure principle of cdwc-70 plastic rubber low temperature brittleness tester
3.1 lifting gripper
The lifting clamp is composed of a cylinder with a holder and a cylinder seat.
The distance from the impacted part of the specimen to the lower end of the holder is 11.0 ± 0.5mm
3.2 impact device
The impact device consists of an impactor and an impact cylinder.
3.3 impactor
Shape and size of impactor head. The weight of the impactor is 200 ± 20g and its working stroke is 40 ± 1mm. When the impact cylinder is in reset state, the distance between the end of impactor and the sample is 25 ± 1 mm.
4、 Application of cdwc-70 plastic rubber low temperature brittleness tester
4.1 turn on the power, the temperature controller and timer display lights.
4.2 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.
4.3 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.
4.4 press the holder to freeze the sample, and start the timing control switch (or press the stopwatch) to time. The freezing time of the sample is 3.0 ± 0.5min. During the freezing period, the temperature fluctuation of freezing medium shall not exceed ± 1 ℃.
4.5 lift the lifting gripper so that the impactor impacts the specimen within half a second.
4.6 take down the sample, bend the specimen to 180 ° according to the impact direction, and carefully observe whether there is any damage.
4.7 after the sample is impacted (each sample is only allowed to be impacted once), in case of damage, the temperature of the frozen medium shall be increased, otherwise, the temperature of the frozen medium shall be reduced and the test shall be continued.
Through repeated tests, the minimum temperature for at least two specimens not to be damaged and the maximum temperature for at least one specimen to be damaged are determined. If the difference between the two results is no more than 1 ℃, the test is over.
5、 Test standard
5.1 specifications
The sample is 25.0 ± 0.5mm long, 6.0 ± 0.5mm wide and 2.0 ± 0.3mm thick.
5.2 requirements
The surface of the sample should be smooth without foreign impurities and damage. The finished product should be cut to the corresponding size after grinding.
6、 Precautions
6.1 do not cut off the cooling cycle during the test, otherwise it will produce the effect of refrigeration.
6.2 the cylinder pressure has been adjusted before delivery and can not be changed arbitrarily.
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