Working principle of Ozone aging test chamber

Ozone aging test chamber can be used for rubber products, such as vulcanized rubber, thermoplastic rubber, cable insulation and sheath, etc., to test the change degree of cracks on the surface of the sample or other properties of the sample at the predetermined time in the constant temperature chamber containing a closed air and ozone without light exposure under continuous or intermittent static or dynamic tensile deformation, To evaluate ozone resistance rubber aging.

With the rapid development of modern industrial technology, rubber and plastic products are more and more widely used, and the environmental conditions experienced are more and more complex and diverse. The only reasonable environmental conditions of the product, and the correct selection of environmental protection measures for the product, so as to ensure that the product is safe and reliable during storage without damage during transportation.

The ozone concentration in the atmosphere is the main factor of little rubber cracking. Strengthen the aging test box to simulate the atmosphere, study the rules of rubber, quickly identify and evaluate the anti-aging performance of rubber. Evaluate the ozone conditions and anti-ozone, ozone protective agent efficacy, and then take effective anti-aging measures to improve the service life of rubber products.

Constant temperature and humidity machine xenon lamp aging test chamber ozone aging test machine imported equipment uses ozone generator, high-voltage power frequency, quartz glass tube welding electrode, which is caused by the stability of ozone concentration, and enters the chamber of commerce after mixing with a certain amount of air. The switch used by ultraviolet ozone concentration detector processes the detected ozone concentration continuous line, and returns to the ozone generator control system, and sets the control system, Maintain the value of properly centralized and effectively controlled events to the ozone chamber. The control system adopts PLC programmable controller. The other is operated by the heating and humidification system to meet all conditions for temperature and humidity test.

Static tensile test:
The standard requires that in two special fixtures for sample capture, the tensile elongation is selected, generally 20%, and the fixed device is installed in the rotating sample holder. The rotation speed of the sample holder is (20-25) mm/s, the temperature is (40 ± 2) ℃, and the relative humidity is less than 65%. The required ozone concentration is tested. After the specified time, check the sample for cracking. Select general ozone concentration (50 ± 5) × 10-8。

Dynamic tensile test:
The standard automatic retractable sample fixture and tensile reset, 0.5 ± 0.025Hz, the frequency caused by two people in the special fixture for the tensile sample, from 0 to the maximum elongation cycle tensile sample elongation, the device is installed in the rotating sample holder, the sample holder rotation speed is (20-25) mm/s, the temperature is (40 ± 2) ℃, and the relative humidity is less than 65%, and the ozone concentration and the tensile fixture and rotation reset are cycled with the test sample holder as required. After the specified time, check the sample for cracking. Select general ozone concentration (50 ± 5) × 10-8。

Dynamic tensile test is divided into continuous and discontinuous dynamic tensile dynamic tension.
Structural design:
The ozone aging test chamber is made of high-quality materials and the shell surface is sprayed with plastic, which is beautiful and smooth. Color coordination and smooth lines. The liner is designed to be sealed without direct sunlight. The aging test specimen can be placed in space. The controlled constant temperature test is ± 2 ℃. Imported high-quality stainless steel plate. Indoor sample holder, fixture and other accessories are difficult to be decomposed by ozone using conduit, and the content of ozone in stainless steel, aluminum and other materials is affected. The height, frequency and amplitude of the pulling force of the sample frame can be adjusted. The sample holder can rotate 360 degrees and the speed is adjustable.

The door is set indoors, and the change of the sample is observed through a reasonable and transparent window. Multi-layer insulating glass observation window, transparent, heat-resistant, anti-freezing, etc., is not easy to generate steam.

The liner between the equipment and the high-density laminated glass fiber cotton filled frame shell cannot ensure that the temperature fluctuation caused by temperature conductivity is too large, and the temperature of the test sample remains unchanged.

The mixing of fan motor, stainless steel multi-blade impeller, high temperature resistant second-hand equipment, long axis convection and vertical diffusion circulation, and the strength and stability of temperature uniformity in the laboratory.

The double seal between cabinet door and cabinet uses high tension temperature to ensure a closed test section. The same door handle without response makes the operation simpler. Set a reasonable position on the left side of the dialog box, one or more test holes, test power lines or external signal lines, and the aperture or number of holes are used to indicate the arrangement.

The installation of high-quality PU wheels can be fixed at the bottom of the machine. The machine can easily move to the designated position and finally fix the casters. Heating and cooling system:
1. Adopt high-speed infrared heating electric wire nickel alloy;
2. Completely independent system, ozone does not affect low temperature test and aging test;
3. The output power of the temperature control algorithm is controlled by the microcomputer to achieve high precision and high efficiency power supply efficiency;
4. Compressor: 1, closed French Taikangji;
5. Cooling mode: air cooling; Alternating salt spray corrosion chamber
6. Refrigerant: R22;
7. The whole system and pipeline are pressurized for 48 hours for ventilation and leak detection test;
8. The heating and cooling systems are completely independent;
9. Refrigerant in copper screw;
10. Evaporator on the slope;
11. Dry filter, refrigerant flow window, repair valve, oil separator, solenoid valve, liquid steel cylinder inlet components.

Control system:
The temperature and humidity control equipment, as well as the imported PLC programmable controller from Taiwan, have simple programming, stable temperature and humidity control, large screen touch screen display and operation concentration. Such as main circuit breaker, AC contactor electrical equipment parts, use of small relays, “Schneider” brand, and other famous electrical accessories.

The time controller required by the test equipment controls the time, and the operation is simple. When the equipment is running, set the time, automatically stop the test, and automatically enter the balance of cooling state.

Ozone test purpose:
Ozone Test Chamber (or called Ozone Aging Chamber and Ozone Aging Test Chamber) is design according to rubber being sensitive characteristic of to ozone, it simulate the environmental to accelerate the rubber aging process by ozone. It compared to different products(test sample) aging result each other according to the same ozone aging test conditions/standards, and get to comparable aging resistance performance.

Test process:
The ozone aging test is expose the test sample at the closed, non-illuminated constant ozone concentration air and constant temperature test box. The sample is tested at predetermined time, to evaluate ozone aging resistance through the sample’s cracks degree or other measured performance change. Ozone aging included static tensile test and dynamic tensile test. The ozone concentration, temperature, humidity, and sample tensile ratio are very important parameters in this aging test.

OTC-015A_Ozone Test Chamber

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