Holographic shading laser packaging material print quality inspection system and inspection method

Abstract

The invention discloses a system and a method for detecting quality of a holographic shading laser packing material printed matter. The system and the method are used for detecting the apparent quality of the laser shading printed matter at an unfixed position. An LED light source and a CCD scan head are asymmetrically arranged on the outer side of a transfer roller for supporting holographic laser shading printed sheet; laser-resistant photic driving mechanisms at least can do linear movement in a plane passing through a detecting point and perpendicular to the axis of the transfer roller and autorotate by revolving the center shaft, are used for adjusting the CCD scan head, and enable the CCD scan head to collect a clear pattern of the printed matter through reflected lights of the LED light source and keep away reflected lights of the laser shading. Aiming at the finished product with the laser shading appearing at the unfixed position in the printed matters, a simple, convenient and effective detection scheme is provided, and the detection of the printing quality can be realized through lowcost transformation of a conventional quality detection system on the production line of the printed matters.

Description

technical field [0001] The invention relates to a high-quality printing system, in particular to a quality detection system and a detection method of a holographic shading laser packaging material printed matter. Background technique [0002] In high-end packaging printing, in order to highlight the colorful appearance of the packaging, laser printing materials are usually used for printing, and on this basis, in order to further improve the anti-counterfeiting of the packaging, regularly arranged, with Anti-counterfeiting graphics with brand characteristics to improve the protection of the legitimate interests of enterprises. However, as the apparent effect of the material becomes more complex, the technology carried also needs to be improved. At present, for laser materials, due to the influence of the laser effect on the surface, image acquisition cannot obtain relatively stable data or data that can represent the overall effect, resulting in In this regard, there has be...

AI Technical Summary

Problems solved by technology

However, as the apparent effect of the material becomes more complex, the technology carried also needs to be improved. At present, for laser materials, due to the influence of the laser effect on the surface, image acquisition cannot obtain relatively stable data or data that can represent the overall effect, resulting in In this aspect, there has been no effective detection method and technology for quality inspection. As for the printing material with shading effect, it has caused great difficulties for quality inspection.

[0003] Since the laser shading printing process is not carried out at the end, the printing quality of the printed matter with unfixed position laser shading cannot be carried out in the process of printing semi-finished products in the existing technology. At present, the quality of the final product is due to the unfixed position of laser shading Influenced by the influence, it cannot be completed automatically by the equipment. The final quality inspection of a large number of high-quality prints can only be completed by sampling and visual inspection. In the quality inspection of the image contrast method, if the laser shading is shielded, the sampling pattern will be destroyed. Due to the location of the laser shading Not fixed, and inconsistent spots in the sampling pattern cannot be excluded by software

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