A Coating Bead Defect Identification Method Applicable to Slot Coating

Abstract

The invention belongs to the related technical field of coating detection, and discloses a coating liquid bead defect identification method applicable to slit coating, the method comprising the following steps: (1) providing a visualization device, and visualizing the The device is installed adjacent to the coating back roller; (2) the visualization device is used to take a side image of the coating bead or the image of the bottom surface of the coating bead; (3) the visualization device processes the captured image and compares it with the pre-stored coating The image of the cloth bead shape is compared and analyzed to realize the automatic identification and classification of coating defects. The method can realize on-line monitoring of the coating bead shape, and compare and analyze the extracted image with the pre-stored coating bead shape image to automatically identify coating defects and provide online guidance for eliminating defects, with strong applicability and relatively low cost. Low, and provide favorable data support for parameter adjustment.

Description

technical field [0001] The invention belongs to the technical field related to coating detection, and more specifically relates to a coating liquid bead defect identification method suitable for slit coating. Background technique [0002] Roll-to-roll manufacturing is widely used in various fields such as lithium-ion battery pole pieces, organic battery films, fuel cell electrodes, and functional films. It is the development direction of advanced processing methods, and coating is one of the most important steps in roll-to-roll manufacturing. one. Slot coating is to transport the stirred and prepared slurry to the slit coating die head. After the slurry is homogenized by the die head, it is uniformly extruded from the slit and coated on the surface of the substrate. After drying Or the process of forming a uniform coating on the substrate after curing, and finally recycling into rolls. There are many parameters in the slit coating process, and unreasonable parameter settin...

AI Technical Summary

Problems solved by technology

However, these measurement methods have the following problems: First, there is a measurement delay. The thickness measurement and the surface density measurement are usually measured after drying and before winding, and there is a long distance from the coating die. When the problem is found, a large amount of coated material has been wasted Instead, it can only detect uneven coating but cannot judge the type of defect, so that it cannot provide guidance for parameter adjustment and eliminate defects

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