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Determination of brittleness temperature of plastics by impact method (GB / T 5470-2008)

Reading times: 1719 publishing time: 2018 / 4 / 18 8:56:43














1、 Low temperature brittle impact testing machine
Product introduction
Low temperature impact testing machine is used to measure the temperature 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. Therefore, both the quality control of materials and their production process are indispensable. book It is designed according to the national standard of GB 1682. The technical indexes meet the requirements of Hg 2-162-1965 plastic low temperature impact compression test method and gb5470-2008 test method of plastic impact embrittlement temperature. ??

? 2、 Low temperature brittle impact testing machine technical parameter
1. Test temperature and time: - 70 degrees (normal for more than 1 hour)
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 ℃, and the temperature control is more accurate.
4. Distance from impactor center to lower end of gripper: 11 ± 0.5mm
5. Outline size: 900 × 500 × 850 working room size: 240 × 170 × 150 (length × width × height)
6. Power: 800W

3、 Low temperature brittle impact testing machine working principle
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
The shape and size of the impactor head are shown in the real object. 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.
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4、 Low temperature brittle impact testing machine usage method
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 after reaching the test temperature, press the start button, and the testing machine will work automatically (press the gripper to start freezing the sample, and start the timing control switch or press the stopwatch for timing. The freezing time of the sample is 3.0 ± 0.5min. During freezing, the temperature fluctuation of freezing medium shall not exceed ± 1 ℃)
4.5 take down the sample, bend the specimen to 180 ° according to the impact direction, and carefully observe whether there is any damage.
4.6 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 freezing medium shall be reduced and the test shall be continued.
4.7 temperature regulation method: A. press the set key, and the temperature controller will enter the setting state
B. press the "< key to move to the position to be set
C. press the "∧" key to adjust the temperature
D. press the "set" key to confirm
Through repeated tests, determine the * temperature of at least two samples that are not damaged and the * temperature of at least one sample being damaged. If the difference between the two results is no more than 1 ℃, the test is over.
5、 Low temperature brittle impact testing machine, factory direct, manufacturer Meet the 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.
Precautions for low temperature brittle impact testing machine

The cylinder pressure has been adjusted before delivery and can not be changed arbitrarily.
6、 Low temperature brittle impact testing machine , manufacturers direct sales, manufacturers Quality assurance

one Our company implements "Three Guarantees of quality", with a one-year warranty period and lifelong service (the cutter is consumable, not within the scope of warranty). During the quality assurance period, be responsible for the faults caused by the defects in design, manufacturing, technology or materials, and repair and replace the defective parts or complete machine free of charge. After the warranty period, the hardware is replaced and the software is upgraded free of charge.

The company does not guarantee the quality of the "three package" free of charge.

3. Our company has branches or offices all over the country, which will respond within 1 hour after receiving the user's fault information and provide solutions within 2 hours. If it is necessary to send professional maintenance engineers to the site for service, they can arrive at the site for maintenance within 48 hours and remove the fault within 4 hours.

3. Our warranty will still be provided after the expiration of warranty.

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Company profile

Yangzhou Yuanfeng test Machinery Factory is a professional manufacturer specializing in research and development, manufacturing and sales of testing machine equipment. The company has * processing equipment, strict management system, strong technical strength and good after-sales service.

The company focuses on the development and manufacture of mechanical property testing equipment for metal and non-metallic materials. It mainly completes the tensile, compression, bending, shearing, tearing, peeling and other performance tests of rebar, metal plate, power fittings, fasteners, casting materials, anchor rod, tray, medical bone plate, bone screw, elastic strip, steel pipe, copper plate, spring, shock absorber, fastener, safety net, FRP, plastic, rubber, medical gloves and other materials and products. Meet GB, ASTM, ISO, DIN and other national and industrial standard test requirements. With more than 400 standards in operation, with appropriate fixtures, almost all mechanical property tests can be completed.

Yangzhou Yuanfeng experimental machinery factory has won the majority of users and market with excellent products and in place service. The products sell well all over the country. Yuanfeng is a fast-growing enterprise in the same industry in China. Yuanfeng takes advantages of others, takes "technology guides the trend, quality creates brand" as the policy, and takes integrity * service as the tenet
Strive to provide customers with mature products and perfect services, so that users get a greater degree of satisfaction.

An excellent enterprise should have an excellent corporate culture;

An excellent corporate culture will create a successful enterprise;

Enterprise spirit: pioneering and innovative, honest and trustworthy, keep improving, pursuing excellence;

Corporate ethics: advocating Millennium civilization and pursuing perfection;

Core concept: to satisfy customers and satisfy themselves;

Business philosophy: practice hard in management, people-oriented;

Squeeze out bubbles in price and reduce profits;

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The service is warm and considerate, the user is supreme;

In the quality of excellence, the pursuit of perfection;

Work style: down-to-earth, diligent and self-supporting;

Life style: three people line, there must be my teacher.


Original author: Yangzhou Yuanfeng experimental Machinery Factory

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