Editor's Note
In real-world applications, battery pack control boards often face challenges such as moisture, condensation, and corrosion from battery electrolytes. Protecting these boards from environmental factors is essential to ensure their long-term reliability and performance. Moisture and chemical corrosion can lead to short circuits, which not only reduce efficiency but also pose safety risks. Therefore, implementing proper protective measures is crucial to maintain the electrical integrity of the control board.
Micro gravure coating is a specialized form of gravure coating that falls under the broader category of roll coating. Unlike traditional gravure methods, micro gravure differs in the orientation and interaction between the anilox roll, the backup roll, and the substrate. As demand for high-performance films increases and wet coating processes become more prevalent, micro gravure coating is gaining traction in advanced functional film manufacturing.
**1. Micro Gravure Coating Principle and Process**
The micro gravure coating process utilizes an anilox roll, which is mounted on bearings and partially submerged in the coating pan. As the roll rotates, it picks up the coating material and transfers it to the substrate. A flexible scraper then removes excess material, ensuring a uniform and controlled layer of coating. The key difference in micro gravure is that the direction of the anilox roll rotation is opposite to the movement of the substrate, allowing for precise and even application without direct pressure.
This method offers several advantages:
- It enables very thin coatings on delicate materials.
- The absence of a back pressure roller reduces defects like smears or wrinkles.
- The light contact between the scraper and the anilox roll minimizes wear.
- Smaller diameter rolls allow for easier replacement and flexibility in coating thickness.
- Reverse coating ensures a smooth and uniform surface finish.
Common applications include light-shielding films, optical films, lithium battery materials, adhesive tapes, and protective films.
**2. Common Defects and Solutions in Micro Gravure Coating**
Like other coating techniques, micro gravure is susceptible to various issues, including environmental contamination, system instability, and mechanical inaccuracies. Additionally, factors such as the structure of the anilox roll, capillary number (Ca), coating speed, wrap angle, and cleaning efficiency play significant roles.
Some common defects include:
- **Horizontal Stripes**: Caused by misalignment, motor vibration, or worn bearings.
*Solution*: Ensure proper alignment, reduce vibrations, and replace worn components.
- **Fine Vertical Lines**: Often due to high blade pressure or mismatched speeds.
*Solution*: Adjust blade pressure and optimize the speed ratio.
- **Vertical Lines**: Result from air bubbles, high viscosity, or excessive speed.
*Solution*: Use baffles to eliminate air bubbles, lower viscosity, and adjust speed accordingly.
- **Uneven Coating Thickness**: May arise from worn blades, unstable speed, or improper wrap angle.
*Solution*: Replace blades, improve system accuracy, and adjust the coating ratio.
- **Poor Wetting**: Can occur due to substrate surface tension issues or impurities in the material.
*Solution*: Ensure substrate uniformity and use filtration to remove contaminants.
- **Poor Leveling**: Usually linked to incorrect solvent choice or incompatible surface tensions.
*Solution*: Adjust viscosity and surface tension, and consider using a higher mesh anilox roll.
By addressing these issues through careful maintenance, precise adjustments, and quality control, micro gravure coating can deliver consistent, high-quality results in demanding industrial applications.
According to the difference in the number of output phases, it can be divided into single-phase and three-phase AC power supplies.
The output power of single-phase adjustable AC power supply ranges from 500VA to 200KVA, the output power of three-phase adjustable AC power supply ranges from 3KVA to 600KVA, the output voltage is divided into 0 ~ 150Vac, 150 ~ 300Vac, and the output frequency is adjustable from 45Hz to 70Hz with 50/60Hz fixed frequency output.
Through the friendly operation panel, you can read the output data such as output voltage, output current, output power, power factor, etc., providing accurate data records for your test, and can add RS485 interfaces as standard, following the MODBUS-RTU international communication protocol, which can realize remote control and operating status monitoring of the power supplies.
This series of adjustable AC Power Supplies have comprehensive protection functions, such as: over voltage, over current, over temperature and short circuit protections, which can protect the AC power supplies and DUT from damages. At present, it is mainly used for Various electrical appliance manufacturers conduct grid simulation tests on electrical appliances according to the voltage/frequency requirements of different countries. Imported electrical appliances are used for the domestic demand for variable voltage and frequency conversion, as well as various AC motors and AC transformers.
Variable Frequency AC Power Supplies
The VFP series AC Power Supplies are high precision, high efficiency, low THD adjustable AC power supplies that converts the input mains power through AC→DC→AC conversion, and gives a pure sine wave AC output with adjustable voltage & frequency within a certain range. Also known as Variable Frequency AC Power Source.
According to the difference in the number of output phases, it can be divided into single-phase and three-phase AC power supplies.
The output power of single-phase adjustable AC power supply ranges from 500VA to 200KVA, the output power of three-phase adjustable AC power supply ranges from 3KVA to 600KVA, the output voltage is divided into 0 ~ 150Vac, 150 ~ 300Vac, and the output frequency is adjustable from 45Hz to 70Hz with 50/60Hz fixed frequency output.
Through the friendly operation panel, you can read the output data such as output voltage, output current, output power, power factor, etc., providing accurate data records for your test, and can add RS485 interfaces as standard, following the MODBUS-RTU international communication protocol, which can realize remote control and operating status monitoring of the power supplies.
This series of adjustable AC Power Supplies have comprehensive protection functions, such as: over voltage, over current, over temperature and short circuit protections, which can protect the AC power supplies and DUT from damages. At present, it is mainly used for Various electrical appliance manufacturers conduct grid simulation tests on electrical appliances according to the voltage/frequency requirements of different countries. Imported electrical appliances are used for the domestic demand for variable voltage and frequency conversion, as well as various AC motors and AC transformers.
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Yangzhou IdealTek Electronics Co., Ltd. , https://www.idealtekpower.com