In optical coating processes, the cleanliness of the vacuum environment plays a decisive role in coating quality. Impurities such as water vapor and oil vapor in residual gases not only prolong vacuuming time and reduce production efficiency but also affect key quality indicators such as film adhesion and color uniformity. Xieyi water vapor capture pumps, with their superior performance, have become an indispensable "vacuum cleanliness guardian" in optical coating processes.
The working principle of Xieyi water vapor capture pumps is based on the Meissenger trapping principle. Water vapor molecules are condensed on an ultra-low temperature surface through a cryogenic coil, effectively adsorbing water vapor. Placing the cryogenic coil in a vacuum chamber or at the pump inlet of an oil diffusion pump utilizes its low-temperature condensation effect to rapidly capture residual gases in the vacuum system. This process can significantly shorten vacuuming time by 60-90% compared to traditional methods, significantly improving production efficiency. Meanwhile, it achieves a cleaner vacuum environment, increasing the vacuum level by half an order of magnitude to 10⁻⁸ Torr and 10⁻⁵ Pa, providing strong support for high-quality coating.
In practical applications, the Xieyi water vapor capture pump exhibits numerous advantages. In applications involving large outgassing of the coated material, such as low-temperature plastic coating and roll-to-roll coating, the cryogenic coil, installed between the high-pressure valve and the vacuum chamber, or within the vacuum chamber itself, or in the upper or lower chambers of the roll-to-roll coating unit, effectively handles the challenges of large amounts of water vapor and oil vapor. Furthermore, its heating defrosting function allows the coil to return to room temperature before each vacuum break, preventing frost buildup from affecting subsequent vacuuming time. Regarding preventing oil vapor backflow in oil diffusion pumps, placing the cryogenic coil below the pump inlet and high-pressure valve of the oil diffusion pump accelerates pumping speed and increases vacuum level, while eliminating the need for a defrosting function, simplifying operation.
The Xieyi water vapor capture pump also features rapid cooling and heating. It can cool to -100℃, or even -150℃, within 3 minutes; during heating, it can quickly regain temperature after 3 minutes of hot air defrosting, and the optimized refrigeration system allows for cooling again within 3 minutes. Furthermore, the combination of a color touchscreen and an industrial PLC allows for historical record retrieval; it uses an internationally branded refrigeration compressor and an environmentally friendly mixed refrigerant; it features multiple temperature and pressure display and recording functions, as well as a comprehensive alarm protection mechanism; the front-mounted valve box facilitates operation, and local/remote switching allows for easy machine combination control; it also features RS485 and TCP/IP communication interfaces for easy connection to a host computer.
Many optical coating manufacturers have seen significant improvements in production efficiency after using the Xieyi water vapor capture pump. For example, before introducing this equipment, one manufacturer experienced long vacuuming times, leading to extended production cycles and limited output. After introduction, the vacuuming time was significantly reduced, production efficiency nearly doubled, and product output increased significantly. Simultaneously, the coating quality also improved significantly.
Post time: 2025-12-06 15:59:55