Management the Quality Control of Application the Adhesive on a Flat Material
Control of accuracy in quality of the products is essential. However, when the products move on the production line in a high speed it might be a problem. During production the paper boxes for packaging purposes the adhesive is applied on corrugated paper as a flat material. The accuracy in application of adhesive on corrugated paper has a direct influence on quality of boxes as final products. The problem of adhesive application is that the production line moves so fast that the physical checking is not possible. Therefore, the automated control is necessary. The designed equipment uses the principle of transmitted signal and its subsequent scanning while eliminating the external influences. The property of the dispersion adhesive, which necessarily contains water, is used when scanning, especially immediately after the application. The adhesive has a different reflection than its surroundings. The reflectivity depends on the wavelength of the test light being emitted. Experimentally, it was verified that the most suitable UV light would be below 400 nm. The external influences may be caused, in particular, by illuminating the hall where oscillation of the light intensity caused by the 50Hz supply voltage can appear. Fluctuation of component parameters, such as temperature changes and possible aging, must also be corrected. The program for the controlling the signals is written in ASSEMBLER and C programming language.
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