Magnetism control device and magnetism control technology for 3D optical variable printing and coating

Abstract

The invention discloses a magnetism control device for 3D optical variable printing and coating. The magnetism control device comprises a printed material movement module, a magnetic field module, a magnetism control module and a setting module, wherein the printed material movement module is used for conducting 3D optical variable printing and coating on a to-be-printed material and conveying a printed material to the common action zone of the magnetism control module and the magnetic field module; the magnetic field module is used for supplying different magnetic fields and magnetic force; the magnetism control module is composed of one or more devices capable of shielding the magnetic fields or shielding local coating curing; and the setting module is used for setting and curing magnetic ink with the three-dimensional effect, and then a finished product is obtained. The magnetism control device is composed of the four modules including the magnetic field module, the printed materialmovement module, the magnetism control module and the setting module, the modules are closely associated with one another, and the variable 3D optical variable effects can be flexibly and quickly formed.

Description

technical field [0001] The invention relates to the technical field of magnetic printing, in particular to a magnetic control device and a magnetic control process for 3D optical variable printing coating. Background technique [0002] At present, 3D optically variable magnetic inks are widely used in various anti-counterfeiting fields. In addition to the traditional light-changing effect, 3D optically variable magnetic ink can also produce a three-dimensional magnetic 3D effect through a magnetic field. Therefore, it is necessary to use a magnet to pass the magnetic ink through a designed specific magnetic field, so that the magnetic pigment flakes can be oriented at different angles in different regions, so that the magnetic ink can produce a unique optically variable pattern effect in the printed matter. [0003] The current magnetic mold production technology mainly has the following three types: [0004] One is to make a magnetic mold by laser degaussing, so as to att...

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Problems solved by technology

[0004] One is to make a magnetic mold by laser degaussing, so as to attract a specific pattern, such as figure 1 As shown: the flexibility and precision of this method are not high, and each pattern plate must be degaussed by precise laser. The production cost and production cycle are very long, and it must be completed by a high-power laser machine. It can only be regarded as simple degaussing, not magnetic control, and digital output cannot be used to produce 3D stereoscopic effects. At the same time, the stereoscopic effect is not strong. It is just a simple magnetic shadow. This kind of technology has already been completed through screen plate making.

[0005] The second is to make magnetic molds by wire cutting, CNC and other hardware processing methods. The precision is not high. Generally, 1mm is the smallest precision. Moreover, the production cost is high, and the yield rate is low. A large number of magnets are installed by hand. 1mm is the smallest precision. It is determined by the distance between the printed matter and the magnet. Even if the hardware processing method is advanced, it cannot break through, such as figure 2 As shown, in the accompanying drawings, 201 represents the magnetic ink, 202 represents the recognition object, and 203 represents the magnetic field

[0006] The third is to generate a magnetic field through electromagnetism, but this magnetic field has only one polarity, and the change is very small, which cannot achieve the 3D effect

image 3 It is the use of the two poles of the magnetic field and the combination of the transition surface to produce many effects, which cannot be achieved by electromagnets.

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