Online coating weight monitoring method

Abstract

Disclosed is an online coating weight monitoring method. Coatings in a coating storage container are extracted into a coating tank, a coating mechanism obtains the coatings from the coating tank and coats the coatings on a substrate, and a coating layer is formed on the substrate. The method is characterized in that redundant coatings in the coating tank spill through a spilling opening arranged in the coating tank side wall and flows back into a coating storage container to enable the liquid level in the coating tank to maintain stable; a weight sensor arranged below the coating storage container detects the weight of the coating storage container and transmits the detected coating storage container weight to a control device; and the control device calculates the coating weight according to the weight of the coating storage container, detection time intervals of the weight sensor, the substrate moving speed and the coating width. According to the online coating weight monitoring method, the coating weight can be monitored online and in real time during regular production, the work efficiency is high, coating weight data can be obtained timely and accurately, and operators are helped to find coating weight abnormal conditions timely and take corresponding measures, so that the rejection rate is reduced.

Description

technical field [0001] The invention relates to the technical field of laser holographic material processing, in particular to an online coating amount monitoring method, which is used for on-line real-time monitoring of coating amount during the manufacturing process of laser holographic materials. Background technique [0002] Laser holographic materials manufactured by holographic laser technology have been widely used, such as anti-counterfeiting materials. At present, the manufacturing process of most laser holographic materials includes batching, coating, molding, aluminum plating, compounding, peeling, slitting, rewinding and other processes. Among them, the coating process is a key process in the manufacturing process of laser holographic materials, and the size and consistency of the coating amount are the key factors affecting the overall quality of laser holographic materials. [0003] Commonly used coating mechanisms and coating methods mainly include the follow...

AI Technical Summary

Problems solved by technology

However, when using the above-mentioned dry coating amount method, the laser holographic material manufacturing equipment must wait for the normal production of the laser holographic material manufacturing equipment to shut down before taking samples for testing, which cannot be monitored in real time, and the work efficiency is low. Data, it often happens that the coating amount is not found to be accurate until the subsequent process, but at this time a lot of products have been manufactured, resulting in a high scrap rate and increasing production costs

Moreover, in actual production, it is often impossible to ensure that all parts of the substrate are uniform. The weight of the substrate part in the sample taken is only roughly equal to the substrate of the same area used for comparison. Therefore, in the above dry coating method, only Approximate knowledge of the weight of the substrate portion of the sample taken, based on which the coating weight can only be roughly measured

In addition, the amount of coating often fluctuates during the coating process, and limited sampling testing cannot reflect the fluctuation of coating amount

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