Working Principle of Slot Die Coating Machine

2024.08.06

Author：slot die coating machine

The working principle of slot die coating machine is mainly based on providing uniform solution delivery to a given surface. The following is a detailed explanation of the working principle:

1. Solution metering and transportation: The slot die coating machine first controls the flow rate of the solution (such as slurry, coating, etc.) through a precise metering system. The solution is transported to the coating head (slit die) at a constant rate.

2. Function of coating head: The coating head is a critical component that includes a narrow slit through which the solution flows uniformly. The width and shape of the slit have a significant impact on the coating thickness and uniformity.

3. Substrate movement: Under the coating head, the substrate (such as lithium battery electrodes, thin films, etc.) moves at a constant speed. The movement of the substrate is synchronized with the outflow of the solution to ensure the uniformity of the coating.

4. Coating formation: When the solution flows out from the narrow slit of the coating head, it uniformly covers the moving substrate. By adjusting the solution flow rate, coating head slit width, and substrate movement speed, the thickness and uniformity of the coating can be controlled.

5. Drying and curing: The coated substrate usually needs to go through a drying and curing process to remove solvents and fix the coating. The drying and curing process may involve heating, ultraviolet irradiation, or other physical or chemical methods.

6. Quality control and testing: Slot die coating machines are usually equipped with quality control and testing systems to ensure consistency and quality of coating. These systems may include wet film thickness measurement, coating uniformity detection, etc.

Qingdao Chenan Machinery Co., Ltd. has the advantage of developing and producing rubber winding equipment, with higher technology than various equipment assembly manufacturers in the industry. For more information about slot die coating machine, please contact us.

Company: Qingdao Chenan Machinery Co., Ltd.

Address: Yanjialing Industrial Park, East Chengma Road, Tongji New Economic Zone, Jimo District, Qingdao City, Shandong Province

Email: qdcajx@gmail.com