YN42167 Natural Ventilation Aging Tester

Used to simulate the aging process of wires and cables in natural environments, and detect the performance changes of their insulation and sheath materials under the action of thermal oxygen. The equipment is designed and manufactured according to relevant national standards, and through precise control of temperature, ventilation, and other testing conditions, aging tests are conducted on wire and cable materials to help enterprises evaluate the aging resistance and service life of products, providing reliable data support for quality control, process optimization, and new product development of wire and cable.

Product overview
YN42167 natural ventilation aging testing machine is a special equipment dedicated to testing the thermal oxygen aging performance of wire and cable insulation materials and sheathing materials. This equipment simulates the aging process of wires and cables in a natural environment by introducing natural air circulation in a controlled high-temperature environment, and detects the performance changes of materials under the combined action of heat and oxygen. The equipment is designed and manufactured in accordance with relevant national standards. By accurately controlling temperature, ventilation and other test conditions, it conducts accelerated aging tests on cable materials, helping companies evaluate the aging resistance and service life of products, and providing reliable data support for quality control, process improvement and new product development of wires and cables.

Why is natural ventilation aging testing important?
During the long-term use of wires and cables, they will inevitably be affected by the combined effects of heat, oxygen, light, mechanical stress and other factors. Among them, thermal oxygen aging is one of the most important forms of aging. Under the combined action of high temperature and oxygen, insulation and sheath materials will undergo molecular chain breakage, cross-linking or oxidation reactions, causing the materials to become hard, brittle, lose elasticity, and ultimately lose their insulation protection function.

The natural ventilation aging test can evaluate the long-term aging resistance of materials in a short time by accelerating the simulation of this process. This test is a key means to determine whether the cable material formula is reasonable, whether the degree of cross-linking is sufficient, and whether the antioxidant system is effective. It is directly related to whether the product can meet the assessment requirements of national standards (GB/T 2951) and international standards (IEC 60811). It is an indispensable testing item in the quality assurance system of cable companies.

Core features and technical advantages
Precise temperature field control
Adopting microcomputer PID intelligent temperature control system and equipped with high-precision thermocouple sensors, the temperature control accuracy can reach ±1℃;

Working temperature range: room temperature +10℃~300℃ (up to 400℃ optional), fully covering the commonly used temperature points for wire and cable aging tests (such as 100℃, 120℃, 135℃, 200℃, etc.);

The temperature uniformity inside the box is better than ±2.5% (tested according to standard methods), ensuring that all samples are in a consistent temperature field environment and eliminating the impact of temperature deviation on test results.

Standard natural ventilation design
The equipment is designed in strict accordance with the technical requirements for natural ventilation aging boxes in GB/T 2951.12-2008 and IEC 60811-1-2 standards;

The number of air exchanges can be adjusted through a precision needle valve, and combined with a special air exchange volume measuring device (optional), the air exchange volume can be accurately controlled within the standard requirement range of 8 to 20 times/hour;

The box is equipped with a reasonable layout of air inlets and exhaust outlets, and utilizes the principle of thermal pressure natural convection to achieve air circulation, avoid abnormal airflow impact on the sample surface caused by forced blast, and truly simulate natural ventilation conditions.

High quality and durable box structure
Stainless steel liner, resistant to high temperatures and corrosion, easy to clean and maintain;

High-quality cold-rolled steel plate casing, surface electrostatic spray treatment, beautiful and durable;

The ultra-thick thermal insulation layer is filled with high-quality ceramic fiber cotton, which has excellent thermal insulation performance and effectively reduces energy consumption and shell temperature;

The large-sized double-layer tempered glass observation window is equipped with a lighting device, making it easy to observe the status of the sample at any time during the test, and to grasp the test progress without opening the door.

Convenient and safe humanized design
Independent over-temperature protection system: When the temperature in the box exceeds the set safety range, the heating power is automatically cut off to ensure test safety;

Adjustable stainless steel shelf: the specimen placement position can be flexibly adjusted according to the number and size of specimens;

Rotating sample rack (optional): allows the sample to be heated more evenly, especially suitable for simultaneous testing of large batches of samples;

Intelligent timing function: The total test time can be set. When the set time is reached, the heating will automatically stop and an alarm will appear. No personnel is required.

Abundant sample loading capacity
The effective working room volume is about 150L ~ 225L (multiple specifications are optional), which can accommodate dozens of dumbbell-shaped samples or short sections of finished cables at the same time;

Meet the standard requirements for the ratio of sample to box volume and ensure sufficient air circulation space.

Applicable test standards
This equipment fully complies with the technical requirements for natural ventilation aging tests in the following standards:

GB/T 2951.12-2008 "General test methods for insulation and sheath materials of electric and optical cables - Part 12: General test methods - Thermal aging test methods"

IEC 60811-1-2 corresponds to international standards

Aging test provisions in GB/T 5013, JB/T 8734, UL 1581 and other related product standards

Typical testing process
Sample preparation: Cut a dumbbell-shaped sample of the insulation layer or sheath layer from the finished cable, measure and record its initial tensile properties (tensile strength and elongation at break) or other physical properties;

Place the sample: Hang the sample freely or lay it flat on the shelf in the aging box to ensure that the samples do not contact or overlap with each other;

Setting parameters: Set the aging temperature (such as 135℃±2℃) and aging time (such as 168 hours) according to the standard requirements, turn on the ventilation system and adjust it to the specified number of ventilations;

Perform aging: start heating and start timing after reaching the set temperature. There is no need to open the door during aging;

Take out and evaluate: After aging, take out the sample, place it in a standard environment for a specified time, and test its tensile properties, tensile strength retention rate, elongation at break retention rate and other indicators. Compare it with the unaged control sample to evaluate the performance change rate before and after aging to determine whether the material is qualified.

Application areas
Wire and cable manufacturing enterprises: used for raw material incoming inspection, insulation and sheath formula verification, cross-linking process optimization, finished product type testing and factory sampling inspection;

Polymer material supplier: used for aging resistance performance evaluation and batch consistency control of rubber, PVC, XLPE, TPE and other cable materials;

Third-party testing agencies and certification laboratories: used for thermal aging test projects in CCC certification, UL certification, VDE certification, etc.;

Scientific research institutes and universities: used for the research and development of new aging-resistant materials, cable life prediction research and aging mechanism analysis.

Product matching recommendations
In order to build a complete wire and cable material aging performance testing system, it is recommended to use the YN42167 natural ventilation aging testing machine with the following equipment:

YN42043 thermal elongation test device: evaluate the thermal elongation performance changes of materials before and after aging;

Universal tensile testing machine: determine the tensile strength and elongation at break of materials before and after aging;

YN31118 Smart Cable Special Projector: Accurately measure the dimensional parameters of the sample.