Laser online marking method and device used for packaging material with film coated on surface

Abstract

The invention discloses a laser online marking method and device used for a packaging material with a film coated on the surface. The marking method comprises the following steps of: guiding in a to-be-marked pattern into an industrial controller, setting parameters of a laser unit, controlling a laser beam generated by the laser unit to act into a transparent film layer on the inner layer of the packaging material or to pass through the transparent film layer to act to the inner part of a colored layer; and marking the pattern inside the transparent film layer on the inner layer of the packaging material or inside the colored layer, detecting the marked pattern after marking, and eliminating products which are detected to be marked in an unqualified mode. The pattern is marked inside the transparent film layer or the colored layer, so that anti-counterfeit identification codes such as two-dimensional codes and batch number are not worn forever; and moreover, the inner surface of the packaging material is not damaged, the organization layer structure of the original packaging material and sealing properties of the organization layer are not damaged, speed of making the anti-counterfeit identification codes such as two-dimensional codes and batch number is quick, the effects are clear and beautiful, and therefore, the laser online marking method is suitable for various packaging materials with films coated on the surfaces.

Description

technical field [0001] The invention belongs to the technical field of laser marking, and in particular relates to a laser online marking method and device for surface-coated packaging materials. Background technique [0002] With the improvement of modern people's living standards, more and more attention is paid to the health of the human body, especially in the field of fast-moving consumer goods. The inner surface of many packaging materials is covered with a transparent protective film to prevent direct entry into the human mouth. Food, medicine, beverages and dairy products are in direct contact with packaging materials, because the inner surface of uncoated packaging materials usually contains harmful substances such as inks, paints and pigments. [0003] On the other hand, with the rapid development of modern technology, fake and shoddy goods are becoming more and more rampant. Traditional anti-counterfeiting technology is easy to be counterfeited, and laser marking...

AI Technical Summary

Problems solved by technology

[0004] For packaging materials coated on the inner surface, when laser marking technology is used for processing, one situation is that there is a problem of breaking down the film layer on the inner surface, and the other situation is that the laser beam cannot penetrate the film layer and will not The problem of film absorption

The former situation will cause the transparent film layer to fail to play its due protective role in one part, especially for fluid substances such as beverages and dairy products, which will cause a greater chance of direct contact with the harmful layer of the packaging material. especially obvious

The latter situation will cause laser marking to be impossible to achieve

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