High and low temperature cyclic bending durability testing machine

1、 Product Usage:

Shenzhen Puyun Electronics Co., Ltd. PY-E608D modelHigh and low temperature cyclic bending durability testing machine，It is a professional equipment used to test the bending performance and reliability of flexible screens and related flexible materials under different temperature environments. It is widely used for 180 degree folding testing of flexible materials such as FFC, FPC, TP, flexible circuit boards, flexible films, flexible screens, graphene, and flexible boards. The control system of the flexible screen high and low temperature repeated folding testing equipment adopts touch screen and PLC communication. The environmental temperature and humidity, bending frequency, speed, radius, and angle can be set according to user requirements.

2、 Product features:

（1） Box structure:

2.1.1. Inner box material: SUS304 # (1.2mm thick) stainless steel plate is used, which has the advantages of acid resistance, corrosion resistance, and easy cleaning.

2.1.2. Outer box material: Cold rolled steel plate with baked paint treatment, 1.2mm thick.

2.1.3. Insulation and noise: The insulation layer is made of polyurethane foam, which is lightweight, durable, and corrosion-resistant. The box door is sealed with magnetic tape, which has a beautiful appearance and high temperature control accuracy; The connection between the inner and outer boxes is made of non-metallic materials that are resistant to high and low temperatures, effectively reducing temperature conduction; The humidification method adopts isolated humidification; Equipped with a sealed refrigeration unit, it runs smoothly with low noise, and uses stainless steel finned heating tubes to heat the air, preventing rust and corrosion.

2.1.4. Load bearing bottom plate: thickened according to requirements, used for installing flexible screen folding devices to ensure stable operation during testing.

2.1.5. Test hole: Open a Φ 50mm test hole on the left side, and attach corresponding insulation accessories and special sealing soft plugs.

2.1.6. Observation window: Made of double-layer vacuum strengthened glass, with built-in LED tubes and a heating defrosting line on the inside, allowing for clear observation of the testing process inside the box.

2.1.7. Door handle: Adopting a hidden door handle, it is easy to open and close without taking up space.

2.1.8. Mobile and positioning device: High quality brake universal casters are installed at the bottom of the machine, which can easily and quickly move the machine to its position and fix it.

2.1.9. Panel: The control panel is divided into two parts, one part controls the temperature and humidity inside the box, and the other part controls the operation of the bending test machine

2.1.10. Protection: All power switches and emergency stop buttons should use switch buttons with protective covers.

（2） Bending structure:

2.2.1. Transmission: The servo motor drives the synchronous toothed belt, causing the inner and outer folding actuators to repeatedly perform folding and folding actions, achieving bending testing of flexible materials fixed on the fixture. The motor is installed outside the testing box.

2.2.2. Fixture: Composed of two flat plates with dimensions of 350 * 250mm, the angle of the plates can be adjusted, and the folded flat surface is installed inside the environmental box.

2.2.3. Bending angle: can be set arbitrarily between 0-180 °.

2.2.4. Bending radius: R1mm, R1.5mm, R2mm, etc. can be customized according to customer requirements

2.2.5. Bending speed: 5-60 times/minute, flexible adjustment according to testing requirements.

2.2.5. Control: Microcomputer and integrated circuit control, automatic measurement and control, 7-inch display screen.

（3） TheFlexible film high and low temperature bending fatigue testing machine Temperature and humidity control system:

2.3.1. Adopting precision LCD display programmable temperature controller; Intelligent digital PID microcomputer temperature control instrument; There can be multiple sets and segments of programming operations, with optional settings and programs. The time can be set arbitrarily, and the start and stop times can be scheduled. After a power outage, the cold and hot start can be set according to the scheduled settings

2.3.2. Touch sensitive settings, digital and direct display, humidity directly displayed as a percentage;

2.3.4. Convenient data processing: Can be connected to a computer (optional 232 communication interface and LAN communication interface), with a USB data transfer interface (USB flash drive), displayed on the computer, and printed with temperature, humidity, and time curves, providing strong guarantee for data storage and playback during the experimental process.

（4） Freezing and Heating Humidification System:

2.4.1. The refrigeration unit adopts the American Copeland compressor and uses environmentally friendly refrigerant (R404a), which facilitates the use of different compressors for different temperature ranges.

2.4.2. The temperature and humidity control adopts the P.I.D+S.S.R system for coordinated control of the same channel, with automatic calculation function, which can immediately correct the temperature and humidity change conditions, making the temperature and humidity control more accurate and stable.

2.4.3. High precision controllers are used for both temperature and humidity, with precise display of relative temperature and humidity performance settings. The temperature resolution reaches 0.01 ℃ and the humidity is 0.1% R.H.。

2.4.4. Nickel chromium alloy high-speed heating electric wire heating, high temperature independent.

2.4.5. The stainless steel tube is equipped with a nickel chromium alloy high-speed heating wire and high-temperature magnesium oxide powder humidification, which has a fast reaction time and long service life.

2.4.6. The heating and humidification systems are independent, and there is an automatic water replenishment device for humidity.

（5） Protection system:

2.5.1. Equipment overheating, fan overheating protection;

2.5.2. Equipment under phase/reverse phase, refrigeration system overload protection, refrigeration unit overpressure protection;

2.5.3. Equipment timed protection;

2.5.4. Equipment anti dry burning device protection;

2.5.5. Protection against leakage, operation indication, automatic shutdown after fault alarm, etc.

3、 Main technical parameters:

Flexible screen refers to flexible OLED. The successful mass production of flexible screens not only greatly benefits the manufacturing of the new generation of smartphones, but also has a profound impact on the application of wearable devices due to its low power consumption and bendability. In the future, flexible screens will be widely used with the continuous penetration of personal intelligent terminals.

A flexible screen phone refers to a phone that uses a bendable and flexible screen, also known as a rolled up phone due to its shape resembling a scroll. OLED is very thin and can be mounted on flexible materials such as plastic or metal foil. If plastic is used instead of glass, it will make the display screen more durable and lightweight. The flexible OLED panel is concave from top to bottom, with a bending radius of up to 700 millimeters.

OLED uses a plastic substrate, while the uncommon glass substrate utilizes thin film packaging technology and a protective film is attached to the back of the panel, making it bendable and less prone to breakage. Flexible screens can be curled, but not folded. Future products should be able to fold and have more variations in appearance.

The display screen is cut from the panel. Flexible displays, also known as flexible screens, are seen as the primary product of the display revolution, with the ultimate goal of transforming mobile and wearable electronic devices.

Shenzhen Puyun Electronics Co., Ltd. PY-E608D modelHigh and low temperature bending fatigue testing machine

The high and low temperature cyclic bending durability testing machine is a precision testing equipment that integrates temperature environment simulation and dynamic mechanical bending functions. By accurately reproducing harsh temperature and humidity changes and repeated bending stresses, it widely serves the following industries:

Consumer electronics industry: This is the core application area of this device, especially with the popularity of flexible products such as foldable screen phones and wearable devices, the demand for testing is increasing day by day. The equipment is mainly used to simulate cold (such as -40 ℃) or humid and hot (such as 85 ℃/85% RH) environments, and conduct repeated opening and closing tests (such as over 100000 times) on flexible screens (OLEDs), hinges, flexible circuit boards (FPCs), ultra-thin flexible glass (UTGs), etc., to verify their resistance to brittle cracking, touch layer conductivity stability, and electrical conductivity reliability. Folding screens that have not undergone such composite testing may have a fault repair rate of up to 23% after six months of use.

Automotive manufacturing industry: This equipment is used to evaluate the long-term reliability of automobiles in extreme weather conditions, with testing objects including sealing strips, wiring harnesses, sensors, interior materials, etc. For example, car seals need to undergo repeated bending tests within a wide temperature range of -40 ℃ to 150 ℃ to ensure that they can maintain good sealing performance under various weather conditions and prevent rainwater and dust from entering the car. Some international car companies also require seals to undergo a composite test of 100 temperature changes and 10000 bending cycles between -40 ℃ and 80 ℃.

New energy industry: This equipment is widely used in the field of new energy, mainly for verifying the conductivity and sealing performance of key components such as power battery terminals, flexible connectors, photovoltaic module connecting wires, etc. under repeated bending. Taking the power battery terminal ear as an example, it needs to undergo more than 50000 bending tests in a temperature cycle of -30 ℃ to 120 ℃ and a specific humidity change environment to ensure battery life and safety. Industry enterprises such as CATL have introduced customized equipment to break through the testing technology bottleneck of 'high and low temperature+humid heat+bending fatigue' composite working conditions. In the field of photovoltaics, this device can also be used to evaluate the performance degradation of flexible photovoltaic cells under temperature, humidity, and mechanical stress changes.

Aerospace and Defense Industry: Aircraft and spacecraft materials need to withstand harsh environments at high altitudes and extremely low temperatures (such as -70 ℃). This equipment is used to test the bending strength and fatigue durability of metal materials, composite materials, and structural components in high and low temperature environments, ensuring their structural integrity and safety under working conditions. At the same time, it is also suitable for testing the bending or cold resistance of materials such as rubber, plastic, wire and cable in the defense industry at low temperatures.

Yiliao industry: This equipment is used to evaluate the bending fatigue life of medical materials, surgical implants, flexible sensors, Yiliao instrument connectors, etc. in high and low temperature environments. For example, the low-temperature environment in the Yiliao cold chain can be simulated to test the performance stability of flexible sensors after repeated bending. Some devices can also be equipped with constant temperature water baths or corrosion solution tanks to meet the fatigue performance testing requirements of biomaterials in specific environments.

Shoe materials and leather industry: This equipment is widely used for testing the bending (twisting) or cold resistance of finished shoes, soles, synthetic leather, rubber and other materials in low-temperature environments, in order to understand the adaptability of materials or finished products to low-temperature climates or cold regions. For example, the sole of a cold proof boot needs to have no cracks after 10000 bends at -20 ℃.

Other industries: In addition, this equipment is widely used in materials science research and development (studying the bending performance of different materials in low-temperature environments, providing important references for material design and optimization), scientific research education and quality inspection institutions (as teaching and testing tools for universities, scientific research institutions, technical supervision, quality inspection stations and other departments), as well as fields such as petrochemicals, machinery manufacturing, new materials, ceramic building materials, etc.