Method and device for preparing anti-counterfeiting pattern capable of symmetrically changing with visual angles

Abstract

The invention relates to a method and a device for preparing an anti-counterfeiting pattern capable of symmetrically changing in brightness or colors with visual angles. The preparation device comprises a first magnetic field generation device, a second magnetic field generation device, a first curing light source, a second curing light source, a blocking grid plate and a base material conveying device. The anti-counterfeiting pattern prepared by the preparation method can change symmetrically by the methods of magnetic field induction, semi-blocking curing, secondary magnetic field induction and secondary curing, boundaries of all regions are clear and obvious, and fine stripes and the pattern can be realized; the preparation process can be kept continuous without interruption; and one magnetic field and one blocking curing are used as one unit, a plurality of units can generate a plurality of regions with the changes in the brightness or the colors, the preparation process is more complex, and the anti-counterfeiting function is higher.

Description

technical field [0001] The invention relates to a method and device for preparing an anti-counterfeiting pattern product, in particular, the invention relates to a method and a device for preparing an anti-counterfeiting pattern that produces symmetrical changes in light and shade or color as the viewing angle changes. Background technique [0002] All kinds of anti-counterfeiting products play an important role in every corner of the world; scientific research institutes and enterprises at home and abroad all require modern anti-counterfeiting technology to be "easy to identify and difficult to forge". Products with low manufacturing process are easy to be imitated. As time goes by, a large number of anti-counterfeiting technologies such as fluorescent anti-counterfeiting, temperature-changing anti-counterfeiting, and holographic patterns with relatively simple structures gradually lose their anti-counterfeiting effects and begin to withdraw from the anti-counterfeiting mark...

AI Technical Summary

Problems solved by technology

[0003] In 2006, Xibai Holdings Co., Ltd. disclosed the patent number (200480018382.5) of "Method and Device for Inducing Patterns in Coatings Containing Magnetic Particles by Magnetic Field Action". method, to a certain extent, has played a positive anti-counterfeiting role; but the defect of this method is that each area of ​​the pattern is controlled by the magnetic field generated by the same magnetic circuit board, and is cured at one time, while the magnetic fragment pigment at the critical point of each area is subject to multiple Influenced by the magnetic lines of force in different directions, the arrangement angle of the magnetic fragments and pigments at the critical point is not easy to control, causing the critical point to be blurred and unclear, and it is impossible to form a high-precision anti-counterfeiting pattern.

This invention is only the prototype of the application of magnetic flake pigments. It only considers the magnetic detection and anti-counterfeiting of magnetic pigments, and does not consider that the pigments can be oriented in a magnetic field to form anti-counterfeiting patterns.

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