Magnet fixing device and magnet fixing method

Abstract

The application discloses a magnetizing device and a magnetizing method. The magnetizing device comprises a bearing platform, a magnetic field generating component and a rotating assembly. The first magnetic field generating group and the second magnetic field generating group of the magnetic field generating component are arranged on the bearing platform. The bearing platform is used for bearing a first to-be-magnetized composition. The first to-be-magnetized composition is magnetized under the condition that the first magnetic field generating group and the second magnetic field generating group meet a preset first magnetizing condition, and a first magnetized composition is obtained. The rotating assembly is used for rotating the first magnetic field generating group and the second magnetic field generating group by a first preset angle along a horizontal direction, and a second to-be-magnetized composition is placed on the first magnetized composition. The second to-be-magnetized composition is magnetized under the condition that the rotated first magnetic field generating group and the second magnetic field generating group meet a preset second magnetizing condition, and a second magnetized composition is obtained. In this way, the front color and the side color of the second magnetized composition and the first magnetized composition can be exchanged, and a reversible color is formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optically variable ink printing, in particular to a magnet setting device and a magnet setting method. BACKGROUND

[0002] At present, the optically variable ink based on the principle of light interference has been widely used in various anti-counterfeiting fields such as banknotes, securities and certificates, due to its unique angle-dependent color change effect, non-reproducibility and various optical change effects.

[0003] In the existing optically variable ink, due to the influence of the principle of light interference physics and the paving property of pigments, the color brightness observed at a large angle of 60° is obviously lower than that observed at a normal angle, and the color change rule moves towards the short wave direction, such as green to blue, blue to purple, etc.

[0004] However, at present, in the process of color interconversion, the same position is transformed into another color, which often needs to be observed at different angles to obtain the color interconversion effect of the same position, so that the gap distance between the pigments in the magnetized composition at the same position is strictly limited, thereby reducing the production efficiency of the finished product. SUMMARY

[0005] The first aspect of the embodiment of the present application provides a magnet setting device, which comprises a bearing platform, a magnetic field generating component and a rotating assembly, the magnetic field generating component and the rotating assembly are arranged on the bearing platform;

[0006] The magnetic field generating component comprises a first magnetic field generating group and a second magnetic field generating group, the first magnetic field generating group and the second magnetic field generating group are arranged on the bearing platform, and the first magnetic field generating group and the second magnetic field generating group are arranged in a spatial quadrilateral;

[0007] The bearing platform is used for bearing a first magnetized composition, under the condition that the first magnetic field generating group and the second magnetic field generating group meet a preset first magnetization condition, the first magnetic field generating group and the second magnetic field generating group are used for magnetizing the first magnetized composition to obtain a first magnetized composition;

[0008] The rotating assembly is connected to the magnetic field generating component and is used for rotating the first magnetic field generating group and the second magnetic field generating group by a first preset angle along the horizontal direction, and placing a second magnetized composition on the first magnetized composition;

[0009] Under the condition that the rotated first magnetic field generating group and the second magnetic field generating group meet a preset second magnetization condition, the rotated first magnetic field generating group and the second magnetic field generating group are used for magnetizing the second magnetized composition to obtain a second magnetized composition, and the front color and the side color of the second magnetized composition are inversed with the first magnetized composition, forming an interconversion color.

[0010] The magnetizing device further comprises a detection component, which is arranged adjacent to the magnetic field generating component, and is used for detecting the horizontal distance between the magnets in the first magnetic field generating group before rotation, and detecting the vertical distance between the second magnetic field generating group and the first magnetic field generating group after rotation and the included angle of the spatial quadrilateral, to obtain the first preliminary condition before rotation, so as to determine whether the first preliminary condition meets the first magnetization condition.

[0011] The detection component is further used for detecting the horizontal distance between the magnets in the first magnetic field generating group after rotation, and detecting the vertical distance between the second magnetic field generating group and the first magnetic field generating group after rotation and the included angle of the spatial quadrilateral, to obtain the second preliminary condition after rotation, so as to determine whether the second preliminary condition meets the second magnetization condition.

[0012] The magnetizing device further comprises a positioning component, which is arranged on the bearing platform, and is used for fixing the magnetic field generating component.

[0013] The first magnetic field generating group comprises a first permanent magnet group arranged adjacent to the width direction of the bearing platform, and the first permanent magnet group is horizontally arranged on the positioning component to form the first magnetic field.

[0014] The second magnetic field generating group comprises a second permanent magnet group arranged on the positioning component, and the second permanent magnet group is arranged at a second preset angle with the bearing platform to form the second magnetic field which optimizes the first magnetic field.

[0015] The horizontal distance between the magnets in the first permanent magnet group ranges from 10 mm to 100 mm, and the vertical distance between the second permanent magnet group and the first magnetic field generating group ranges from 5 mm to 50 mm.

[0016] The included angle of the spatial quadrilateral ranges from 30° to 90°, the first preset angle ranges from 160° to 180°, and the second preset angle ranges from 40° to 50°.

[0017] The first and / or second magnetized composition comprises a pigment composition.

[0018] The pigment composition comprises full-medium pigments and magnetic pigments with a mass fraction of 20% to 80%, the full-medium pigments have a transmittance ≥ 60% in the visible light band, and the magnetic pigments have a transmittance ≤ 10% in the visible light band.

[0019] In addition, the second aspect of the embodiment of the present application provides a magnetizing method, which is applied to the magnetizing device provided in the first aspect, and comprises the following steps:

[0020] Determining that the first magnetic field generating group and the second magnetic field generating group meet the preset first magnetization condition;

[0021] magnetize the first to-be-magnetized composition by controlling the first magnetic field generating set and the second magnetic field generating set to obtain a first magnetized composition;

[0022] rotating the first magnetic field generating set and the second magnetic field generating set by a first preset angle along a horizontal direction;

[0023] placing a second to-be-magnetized composition on the first magnetized composition;

[0024] determining that the rotated first magnetic field generating set and the second magnetic field generating set meet a preset second magnetization condition;

[0025] magnetizing the second to-be-magnetized composition by the rotated first magnetic field generating set and the second magnetic field generating set to obtain a second magnetized composition, wherein the front color and the side color of the second magnetized composition are inversed with the first magnetized composition to form a reversible color.

[0026] The step of magnetizing the first to-be-magnetized composition by controlling the first magnetic field generating set and the second magnetic field generating set to obtain a first magnetized composition comprises:

[0027] placing the first to-be-magnetized composition at the magnet gap of the first magnetic field generating set for magnetization and solidification, so that the magnetic pigments in the first to-be-magnetized composition are arranged in parallel at 0-15° to obtain a first pattern.

[0028] The step of magnetizing the second to-be-magnetized composition by the rotated first magnetic field generating set and the second magnetic field generating set to obtain a second magnetized composition, wherein the front color and the side color of the second magnetized composition are inversed with the first magnetized composition to form a reversible color comprises:

[0029] placing the second to-be-magnetized composition at the magnet gap of the rotated first magnetic field generating set for magnetization and solidification, so that the magnetic pigments in the second to-be-magnetized composition are arranged vertically at 75-90° to obtain a second pattern;

[0030] The front color and the side color of the first pattern and the second pattern are inversed to form a reversible color.

[0031] The beneficial effects of the present application are: through the above-mentioned manner, the present application can provide a magnetizing device, wherein the magnetic field generating component and the rotating assembly are arranged on the bearing platform, the first magnetic field generating group and the second magnetic field generating group of the magnetic field generating component are arranged in a spatial quadrilateral, so that when the first magnetic field generating group and the second magnetic field generating group meet the preset first magnetization condition, the first magnetic field generating group and the second magnetic field generating group are used for magnetizing the first to-be-magnetized composition to obtain the first magnetized composition. And when the rotated first magnetic field generating group and the second magnetic field generating group meet the preset second magnetization condition, the rotated first magnetic field generating group and the second magnetic field generating group are used for magnetizing the second to-be-magnetized composition to obtain the second magnetized composition. Since the first magnetized composition is placed with the second to-be-magnetized composition, the front color and the side color of the second magnetized composition and the first magnetized composition are inversed at the same position, forming a reversible color. Thus, the color-reversing effect is realized at the same position, and the production efficiency of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0033] Figure 1 is a front view structural schematic diagram of the magnetizing device of the present application;

[0034] Figure 2 is a principle structural schematic diagram of a finished sample in the magnetizing device of the present application

[0035] Figure 3 is another principle structural schematic diagram of a finished sample in the magnetizing device of the present application;

[0036] Figure 4 is a perspective structural schematic diagram of an embodiment of the present application; Figure 1

[0037] Figure 5 is a top view structural schematic diagram of an embodiment of the present application; Figure 1

[0038] Figure 6 is a structural schematic diagram of a specific embodiment of the magnetic field generating component before rotation of the present application;

[0039] Figure 7 is a structural schematic diagram of a specific embodiment of the magnetic field generating component after rotation of the present application;

[0040] Figure 8 is a magnetizing effect diagram of the first magnetized composition of the present application;​​

[0041] Figure 9 is the magnetizing effect diagram of the second magnetized composition of the present application. DETAILED DESCRIPTION

[0042] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0043] It is to be understood that the terminology "includes", "has", "holds", "contains" or "comprising", when used in this specification and in the following claims, indicates the presence of the described features, integers, steps, operations, elements, and / or components but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0044] It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0045] It will be further understood that the terms "and / or", as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items, and that the term "at least one of" followed by a list of two or more items means any single one of the items in the list, and that the term "one or more of" followed by a list of two or more items means any single one or plurality of two or more of the items in the list.

[0046] As used in this specification and the appended claims, the term "if' can be construed to mean "when" or "once" or "in response to a determination" or "in response to a detection" of, as appropriate, according to context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be construed to mean "once it is determined" or "in response to a determination" or "once [the described condition or event] is detected" or "in response to the detection [of the described condition or event]", as appropriate, according to context.

[0047] To solve the related technical problems, the present application is described in detail below in combination with specific embodiments. The present application provides a magnetizing device, please refer to Figure 1 , Figure 1 is the front view structural schematic diagram of the magnetizing device of the present application. In order to the final magnetizing effect, several groups of magnetizing devices can be set, wherein Figure 1is two sets of magnetizing device, a set of magnetizing device as shown in the components in the dashed box. The magnetizing device includes: a bearing platform 11, magnetic field generating components 12 and rotating components 13, wherein the magnetic field generating components 12, and rotating components 13 are provided on the bearing platform 11.

[0048] Further, the magnetic field generating components 12 include a first magnetic field generating group 121 and a second magnetic field generating group 122. Wherein, the first magnetic field generating group 121 and the second magnetic field generating group 122 are provided on the bearing platform 11. Specifically, along the vertical direction A-B, the first magnetic field generating group 121 is horizontally arranged at the upper end of the bearing platform 11, and the second magnetic field generating group 122 is arranged between the lower end of the bearing platform 11 and the horizontal plane at an angle of 35-50°, preferably 45°.

[0049] Specifically, in order to better understand the spatial quadrilateral, the specific description of the spatial quadrilateral can be combined with the following Figure 4 And Figure 5 The basic unit of the magnetic field generating components 12 is four identical rectangular long strip-shaped permanent magnets, which form a spatial quadrilateral, wherein the two permanent magnets close to the upper end of the bearing platform 11 are placed horizontally, and the other two permanent magnets close to the lower end of the bearing platform 11 are placed at an angle of 45° with the horizontal plane, so as to form a quadrilateral on the front view projection plane. In this way, the first magnetic field generating group 121 and the second magnetic field generating group 122 are arranged in a spatial quadrilateral, and other embodiments can be arranged in other ways.

[0050] The bearing platform 11 is used to carry the first to-be-magnetized composition. Under the condition that the first magnetic field generating group 121 and the second magnetic field generating group 122 meet the preset first magnetization condition, the first magnetic field generating group 121 and the second magnetic field generating group 122 are used to magnetize the first to-be-magnetized composition to obtain the first magnetized composition.

[0051] Wherein, the preset first magnetization condition can be the horizontal distance d1 between the magnets in the first magnetic field generating group 121, and the vertical distance d2 between the second magnetic field generating group 122 and the first magnetic field generating group 121 and the included angle a of the spatial quadrilateral before rotation meet the preset condition.

[0052] The rotating component 13 is connected to the magnetic field generating component 12, and is used to rotate the first magnetic field generating group 121 and the second magnetic field generating group 122 by a first preset angle along the horizontal direction (perpendicular to the vertical direction A-B), and place the second to-be-magnetized composition on the first magnetized composition.

[0053] When the first magnetic field generating group 121 and the second magnetic field generating group 122, after rotation, meet the preset second magnetization conditions, the first magnetic field generating group 121 and the second magnetic field generating group 122, after rotation, are used to magnetize the second composition to be magnetized, to obtain the second magnetized composition. The front color and side color of the second magnetized composition are interchanged with those of the first magnetized composition to form an interchanging color.

[0054] The preset second magnetization condition can be the horizontal distance d1 between the magnets in the first magnetic field generating group 121, and the vertical distance d2 between the second magnetic field generating group 122 and the first magnetic field generating group 121 and the included angle α of the spatial quadrilateral before detection rotation both satisfy another preset condition.

[0055] Therefore, through the above method, this application can provide a magnetizing device, in which a magnetic field generating component 12 and a rotating component 13 are arranged on a supporting platform 11. The first magnetic field generating group 121 and the second magnetic field generating group 122 of the magnetic field generating component 12 are arranged in a spatial quadrilateral shape, such that when the first magnetic field generating group 121 and the second magnetic field generating group 122 meet a preset first magnetization condition, they are used to magnetize a first composition to be magnetized, resulting in a first magnetized composition. Furthermore, when the rotated first magnetic field generating group 121 and the second magnetic field generating group 122 meet a preset second magnetization condition, they are used to magnetize a second composition to be magnetized, resulting in a second magnetized composition. Since the second composition to be magnetized is placed on the first magnetized composition, the front and side colors of the second magnetized composition and the first magnetized composition are interchanged at the same position, forming a color-changing effect. This achieves a color-changing effect at the same position and improves the efficiency of product production.

[0056] The first and / or second magnetized compositions include a pigment composition. The pigment composition comprises 20-80% by mass of a dielectric pigment and a magnetic pigment, wherein the dielectric pigment has a transmittance of ≥60% in the visible light band, and the magnetic pigment has a transmittance of ≤10% in the visible light band. This allows the sample to exhibit different colors and corresponding pattern brightness when light is reflected from different orientations.

[0057] For details on the specific principles of light reflection, please refer to [link / reference]. Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the principle structure of a finished sample of the magnetization device in this application; Figure 3 This is another schematic diagram of the principle structure of the finished sample of the magnetizing device in this application.

[0058] like Figure 2As shown, the finished sample in the magnetizing device may include a stage 20, and a dielectric pigment 21 and a magnetic pigment 22 disposed on the stage 20. The dielectric pigment 21 with high transmittance and the magnetic pigment 22 with low transmittance constitute a pigment composition. The magnetic pigment 22 in the pigment composition is arranged in a near-vertical configuration at 75-90°, as shown... Figure 2 In (a): Under direct observation, due to the near-vertical arrangement of the low-transmittance magnetic pigments 22, when the light from the light source 31 is incident on the pigment composition, only the front reflected light of the all-media pigments 21 is recognized and collected by the human eye 32, and what is seen at this time is the front color of the all-media pigments 21.

[0059] When the sample is rotated to 60-85°, observe the sample. Figure 2 In (b), the light mainly reaches the human eye 32 through the frontal reflected light of the magnetic pigment 22. Even if a small amount of all-media pigment 21 is stacked with the magnetic pigment 22, the frontal reflected light of the magnetic pigment 22 will still penetrate the all-media pigment 21 due to its high transmittance. Therefore, when observing the sample from the side, the color observed by the naked eye changes from the frontal color of the magnetic pigment 22. Thus, when the sample is rotated, the color observed by the naked eye changes from the frontal color of the all-media pigment 21 to the frontal color of the magnetic pigment 22. By selecting all-media pigment 21 with different frontal colors and low-transmittance magnetic pigment 22, the photochromic color of the pigment composition after printing and magnetization can be effectively controlled, and the color change pattern is not constrained by the "long wavelength to short wavelength" rule.

[0060] Furthermore, since the pigment composition consisting of the medium pigment 21 and the magnetic pigment 22 is not necessarily arranged in a regular pattern, therefore, as Figure 3 As shown, the magnetic pigments 22 in the pigment composition are arranged horizontally at a 0-15° angle, as... Figure 3 In (c), since almost all the magnetic pigments 22 are arranged horizontally under the action of the magnetic field, and due to the high transmittance of the all-media pigments 21, the front view color of the pattern after printing and magnetic curing is dominated by the front color of the magnetic pigments 22.

[0061] Rotate the sample pattern to 60-85°, as shown. Figure 3 In (d), the side colors of the all-media pigment 21 and magnetic pigment 22 laid flat on the stage 20 are very weak, and the superimposed magnetic pigment 22 will cover the side color of the all-media pigment 21. At this time, due to the dispersion effect in the ink, a considerable portion of the all-media pigment 21 that is not oriented still stands on the stage 20 to reflect the incident light. Therefore, the color observed at this time is dominated by the front color of the all-media pigment 21.

[0062] Furthermore, regarding the magnetic field generating component 12, the preset first magnetization condition, and the preset second magnetization condition, please refer to [link to relevant documentation]. Figures 4 to 7 , Figure 4 This applicationFigure 1 A three-dimensional structural diagram of one embodiment; Figure 5 This application Figure 1 A top view of one embodiment of the structure; Figure 6 This is a schematic diagram of the structure of a specific embodiment of the magnetic field generating component before rotation in this application; Figure 7 This is a schematic diagram of a specific embodiment of the magnetic field generating component of this application after rotation.

[0063] The magnetizing device also includes a detection component 14, which is arranged adjacent to the magnetic field generating component 12. The detection component 14 is used to detect the horizontal distance d1 between the magnets in the first magnetic field generating group 121 before rotation, and to detect the vertical distance d2 between the second magnetic field generating group 122 and the first magnetic field generating group 121 before rotation and the included angle α of the spatial quadrilateral, so as to obtain the first preparatory conditions before rotation and determine whether the first preparatory conditions meet the first magnetization conditions.

[0064] In addition, the detection component 14 is also used to detect the horizontal distance d1 between the magnets in the first magnetic field generating group 121 after rotation, and to detect the vertical distance d2 between the second magnetic field generating group 122 and the first magnetic field generating group 121 after rotation and the included angle α of the spatial quadrilateral, so as to obtain the second preparatory condition after rotation, and to determine whether the second preparatory condition satisfies the second magnetization condition.

[0065] Thus, by detecting the magnetic field generating component 12 before and after rotation by the detection component 14, the magnetization preparation conditions that meet the actual conditions can be obtained, which prepares for the subsequent magnetization fixation, so as to obtain a magnetization pattern that meets the requirements after magnetization.

[0066] In addition, the magnetic fixing device also includes a positioning component 15, which is set on the support platform 11 and is used to fix the magnetic field generating component 12. Rotary joints 151 are respectively provided at both ends of the positioning component 15, so as to facilitate the rotation of the rotating assembly 13 to rotate the first magnetic field generating group 121 and the second magnetic field generating group 122, thereby enabling the implementation of the lifting scheme.

[0067] Specifically, the first magnetic field generating group 121 includes a first permanent magnet group adjacent to the width direction of the support platform 11. The first permanent magnet group is horizontally arranged on the positioning component 15 to form a first magnetic field. The second magnetic field generating group 122 includes a second permanent magnet group arranged on the positioning component. The second permanent magnet group is arranged at a second preset angle with the support platform to form a second magnetic field that optimizes the first magnetic field.

[0068] Preferably, the horizontal distance d1 between the magnets in the first permanent magnet group is in the range of 10-100mm, and the vertical distance d2 between the second permanent magnet group and the first magnetic field generating group is in the range of 5-50mm.

[0069] Among them, the included angle α of the spatial quadrilateral is in the range of 30-90°, the first preset angle is in the range of 160-180°, and the second preset angle is in the range of 40-50°.

[0070] Furthermore, this application also provides a magnetization method, which can be applied to the magnetization device provided in the above embodiments of this application, and specifically includes the following steps:

[0071] S11: Determine that the first magnetic field generating group and the second magnetic field generating group satisfy the preset first magnetization condition;

[0072] First, it is necessary to determine whether the first magnetic field generating group 121 and the second magnetic field generating group 122 meet the preset first magnetization conditions, and then fix the first magnetic field generating group 121 and the second magnetic field generating group 122 by the positioning component 15.

[0073] Then, the detection component 14 detects that the horizontal distance d1 between the magnets in the first magnetic field generating group 121 before rotation is 10-100mm, and the vertical distance d2 between the second magnetic field generating group 122 and the first magnetic field generating group 121 before rotation is 5-50mm and the included angle a of the spatial quadrilateral is 30-90°, thus obtaining the first preparatory conditions before rotation.

[0074] Thus, by comparing whether the first preparatory condition and the first magnetization condition are within the permissible range, it is determined that the first magnetic field generating group 121 and the second magnetic field generating group 122 meet the preset first magnetization condition.

[0075] S12: Control the first magnetic field generating group and the second magnetic field generating group to magnetize the first composition to be magnetized, and obtain the first magnetized composition;

[0076] First, before magnetizing and fixing the first composition to be magnetized, the all-media pigment 21 and magnetic pigment 22 of different front colors can be mixed with ink to obtain the first composition to be magnetized, so as to provide preparation conditions for the magnetization operation of the first magnetic field generating group 121 and the second magnetic field generating group 122.

[0077] Then, the first magnetic field generating group 121 and the second magnetic field generating group 122 are controlled to magnetize the first composition to be magnetized, thereby obtaining the first magnetized composition.

[0078] S13: Rotate the first magnetic field generating group and the second magnetic field generating group horizontally by a first preset angle;

[0079] Specifically, the rotating assembly 13 connects to the rotating joints 151 at both ends of the positioning component 15. Through the rotating joints 151, the first magnetic field generating group 121 and the second magnetic field generating group 122 are rotated in the horizontal direction (perpendicular to the vertical direction AB) by a first preset angle, thereby changing the direction of the magnetic field and providing a suitable magnetic field for re-magnetizing and fixing the second composition to be magnetized. The first preset angle can be 160 to 180°, preferably 180°.

[0080] S14: Place the second composition to be magnetized on the first magnetizing composition;

[0081] First, before placing and magnetizing the second composition to be magnetized, the all-media pigment 21 and magnetic pigment 22 of different front colors can be mixed with ink to obtain the second composition to be magnetized.

[0082] To ensure color transitions at the same location, a second composition to be magnetized can be placed on top of the first magnetized composition. Since the first magnetized composition has already been magnetized and fixed, re-magnetization can provide a magnetization basis for color transitions of the pattern at the same location.

[0083] S15: Determine that the first magnetic field generating group and the second magnetic field generating group after rotation meet the preset second magnetization condition.

[0084] The detection component 14 detects that the horizontal distance d1 between the magnets in the first magnetic field generating group 121 after rotation is in the range of 10-100mm, and detects that the vertical distance d2 between the second magnetic field generating group 122 and the first magnetic field generating group 121 after rotation is in the range of 5-50mm and the included angle α of the spatial quadrilateral is in the range of 30-90°, thus obtaining the second preparatory conditions after rotation.

[0085] Of course, the first preparatory condition can be the same as or different from the second preparatory condition, as long as the actual needs are met; no restrictions are imposed here.

[0086] Thus, by comparing whether the second preparatory condition and the second magnetization condition are within the permissible range, it is determined that the rotated first magnetic field generating group 121 and the second magnetic field generating group 122 meet the preset second magnetization condition.

[0087] S16: The first magnetic field generating group and the second magnetic field generating group after rotation magnetize the second composition to be magnetized to obtain the second magnetized composition.

[0088] In this process, the front and side colors of the second magnetizing composition are interchanged with those of the first magnetizing composition, resulting in a color-changing effect. For details, please refer to [link to relevant documentation]. Figure 8 and Figure 9 , Figure 8 This is a diagram showing the magnetic effect of the first magnetizing composition of this application; Figure 9This is a diagram showing the magnetic effect of the second magnetizing composition of this application.

[0089] Furthermore, the step of controlling the first magnetic field generating group and the second magnetic field generating group to magnetize the first composition to be magnetized to obtain the first magnetized composition specifically includes the following steps:

[0090] The first composition to be magnetized is placed in the gap between magnets in the first magnetic field generating group 121 for fixed-magnetization curing, so that the magnetic pigments in the first composition to be magnetized are arranged in parallel at 0-15° to obtain the first pattern, such as... Figure 8 As shown.

[0091] Furthermore, the rotated first and second magnetic field generating groups magnetize the second composition to be magnetized, resulting in a second magnetized composition. The front and side colors of the second magnetized composition and the first magnetized composition are interchanged to form an interchanging color. This step specifically includes the following steps:

[0092] The second composition to be magnetized is placed in the gap between magnets in the rotated first magnetic field generating group 121 for fixed magnetization and solidification, so that the magnetic pigments in the second composition to be magnetized are vertically aligned at 75-90° to obtain a second pattern, such as... Figure 9 As shown.

[0093] In this design, the front and side colors of the first and second patterns are interchanged to create a color-changing effect.

[0094] Specifically, in order to verify the feasibility of the magnetization method, three sets of typical and representative embodiments were carried out, which can be seen in the following three specific embodiments.

[0095] Example 1

[0096] Four identical rectangular permanent magnets are used as the magnetic field generating components 12, forming a spatial quadrilateral. The permanent magnets in the first permanent magnet group, close to the upper surface of the support platform 11, are placed horizontally. The permanent magnets in the second permanent magnet group, close to the lower surface of the support platform 11, are placed at a 45° angle to the horizontal plane. The gap between the first permanent magnet groups of the first magnetic field generating group 121 is 40mm, and their magnetism is different from that of the magnetic strip ends close to the lower surface of the support platform 11. The vertical distance between the second permanent magnet groups of the second magnetic field generating group 122 and the first magnetic field generating group 121 is 20mm, and the included angle α of the spatial quadrilateral is 45°. The pigment composition includes a blue-to-violet all-media photochromic pigment and a purple-to-gold magnetic photochromic pigment. The two pigments are mixed in a 1:1 mass ratio into UV-type ink, screen-printed onto the support stage 20, placed in the gap between the permanent magnets in the first permanent magnet group, and cured under magnetic fixation. The magnetic pigment 22 is oriented in a 0-15° pattern, displaying purple in the front view, corresponding to the front color of the magnetic pigment, such as... Figure 8Pattern A on the left. Rotating the magnetizing device horizontally by 180° yields the rotated magnetizing device, which can orient the magnetic pigment into a pattern of 75-90°. The front view color is blue, corresponding to the front color of the all-media pigment, such as... Figure 8 Pattern B on the right. Observe the sample from the side. Figure 8 Pattern A on the left changes from purple to blue, while pattern B on the right changes from blue to purple. In this way, a set of patterns that alternate between blue and purple can be obtained.

[0097] Example 2

[0098] Four identical rectangular permanent magnets are used as the magnetic field generating components 12, forming a spatial quadrilateral. The permanent magnets in the first permanent magnet group, close to the upper surface of the support platform 11, are placed horizontally. The permanent magnets in the second permanent magnet group, close to the lower surface of the support platform 11, are placed at a 45° angle to the horizontal plane. The gap between the permanent magnets in the first permanent magnet group 121 is 40mm, and their magnetism is opposite to that of the magnetic strips near the lower surface of the support platform 11. The vertical distance between the second permanent magnet group 122 and the first magnetic field generating group 121 is 20mm, and the included angle α of the spatial quadrilateral is 45°. The pigment composition includes a blue-to-violet all-media photochromic pigment and a green-to-blue magnetic photochromic pigment. The two pigments are mixed in a 1:1 mass ratio into UV-type ink, screen-printed onto the support stage 20, placed in the gaps between the permanent magnets in the first permanent magnet group, and cured under magnetic fixation. The magnetic pigment is oriented to pattern A of 0-15°, displaying green in the front view, corresponding to the frontal color of the magnetic pigment. Rotating the magnetic device horizontally by 180° yields a rotated magnetic device that orients the magnetic pigment at 75-90° to pattern B, which appears blue when viewed directly, corresponding to the frontal color of the all-media pigment. Viewing the sample from the side, pattern A changes from green to blue, while pattern B changes from blue to green. This results in a set of patterns with an alternating green and blue color effect.

[0099] Example 3

[0100] Four identical rectangular permanent magnets are used as the magnetic field generating components 12, forming a spatial quadrilateral. The permanent magnets in the first permanent magnet group, close to the upper surface of the support platform 11, are placed horizontally. The permanent magnets in the second permanent magnet group, close to the lower surface of the support platform 11, are placed at a 45° angle to the horizontal plane. The gap between the permanent magnets in the first permanent magnet group 121 is 50 mm, and the magnetic properties of the magnetic strips near the upper surface of the support platform 11 are opposite. The vertical distance between the second magnetic field generating group 122 and the first magnetic field generating group 121 is 15 mm, and the included angle α of the spatial quadrilateral is 45°. The pigment composition includes a silver all-media pigment and a gold-to-green magnetic photochromic pigment. The two pigments are mixed in a 1:1 mass ratio into UV-type ink, screen-printed onto the support stage 20, placed in the gaps between the permanent magnets in the first permanent magnet group, and then fixed and cured. The magnetic pigment is oriented to pattern A of 0-15°, displaying a gold color when viewed directly, corresponding to the front color of the magnetic pigment. Rotating the magnetizing device horizontally by 180° yields a rotated magnetizing device that can orient the magnetic pigment to pattern B at 75-90°. The pattern appears silver when viewed directly, corresponding to the frontal color of the all-media pigment. Viewing the sample from the side, pattern A changes from gold to silver, while pattern B changes from silver to gold. This results in a set of patterns with an alternating silver and gold color effect.

[0101] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. A fixed magnet device, characterized in that, The device comprises a bearing platform, a magnetic field generating component and a rotating assembly, wherein the magnetic field generating component and the rotating assembly are arranged on the bearing platform. The magnetic field generating component comprises a first magnetic field generating group and a second magnetic field generating group, wherein the first magnetic field generating group and the second magnetic field generating group are arranged on the bearing platform, and the first magnetic field generating group and the second magnetic field generating group are arranged in a spatial quadrilateral. The bearing platform is used for bearing a first to-be-magnetized composition, and the first magnetic field generating group and the second magnetic field generating group are used for magnetizing the first to-be-magnetized composition to obtain a first magnetized composition when the first magnetic field generating group and the second magnetic field generating group meet a preset first magnetization condition. The rotating assembly is connected to the magnetic field generating component and is used for rotating the first magnetic field generating group and the second magnetic field generating group along a horizontal direction by a first preset angle, and placing a second to-be-magnetized composition on the first magnetized composition. The first magnetic field generating group and the second magnetic field generating group after rotation are used for magnetizing the second to-be-magnetized composition to obtain a second magnetized composition when the first magnetic field generating group and the second magnetic field generating group after rotation meet a preset second magnetization condition, and the front color and the side color of the second magnetized composition are opposite to those of the first magnetized composition, thereby forming a reversible color. The magnetic field generating device further comprises a detection component arranged adjacent to the magnetic field generating component, which is used for detecting the horizontal distance between magnets in the first magnetic field generating group before rotation, and detecting the vertical distance between the second magnetic field generating group and the first magnetic field generating group before rotation and the included angle of the spatial quadrilateral, to obtain a first preparation condition before rotation, so as to determine whether the first preparation condition meets the first magnetization condition. The detection component is also used for detecting the horizontal distance between magnets in the first magnetic field generating group after rotation, and detecting the vertical distance between the second magnetic field generating group and the first magnetic field generating group after rotation and the included angle of the spatial quadrilateral, to obtain a second preparation condition after rotation, so as to determine whether the second preparation condition meets the second magnetization condition.

2. The magnetic field generating device according to claim 1, wherein the magnetic field generating device further comprises a positioning component arranged on the bearing platform, which is used for fixing the magnetic field generating component.

3. The magnetic field generating device according to claim 2, wherein the first magnetic field generating group comprises a first permanent magnet group adjacent to the width direction of the bearing platform, and the first permanent magnet group is horizontally arranged on the positioning component to form a first magnetic field. The second magnetic field generating group comprises a second permanent magnet group arranged on the positioning component, and the second permanent magnet group is arranged at a second preset angle with the bearing platform to form a second magnetic field which optimizes the first magnetic field.

4. The magnetic field generating device according to claim 3, wherein ​ ​ ​ The horizontal distance between the magnets in the first permanent magnet group ranges from 10 to 100 mm, and the vertical distance between the second permanent magnet group and the first magnetic field generating group ranges from 5 to 50 mm.

5. The magnetizing device according to claim 3, wherein, The included angle of the spatial quadrilateral ranges from 30 to 90°, the first preset angle ranges from 160 to 180°, and the second preset angle ranges from 40 to 50°.

6. The magnetizing device according to any one of claims 1 to 4, wherein, The first and / or second to-be-magnetized composition comprises a pigment composition. The pigment composition comprises full-medium pigments and magnetic pigments, the mass fraction of the full-medium pigments is 20-80%, the transmittance of the full-medium pigments in the visible light band is greater than or equal to 60%, and the transmittance of the magnetic pigments in the visible light band is less than or equal to 10%.

7. A method of magnetizing, characterized by, The magnetizing device according to any one of claims 1 to 6, comprising: determining that the first and second magnetic field generating groups meet a preset first magnetizing condition; controlling the first and second magnetic field generating groups to magnetize the first to-be-magnetized composition to obtain a first magnetized composition; rotating the first and second magnetic field generating groups by a first preset angle along a horizontal direction; placing a second to-be-magnetized composition on the first magnetized composition; determining that the rotated first and second magnetic field generating groups meet a preset second magnetizing condition; magnetizing the second to-be-magnetized composition by the rotated first and second magnetic field generating groups to obtain a second magnetized composition, the front color and side color of the second magnetized composition are opposite to those of the first magnetized composition, forming reversible color.

8. The magnet design method according to claim 7, wherein The step of controlling the first and second magnetic field generating groups to magnetize the first to-be-magnetized composition to obtain a first magnetized composition, comprises: placing the first to-be-magnetized composition at the magnet gap in the first magnetic field generating group for magnetization and solidification, so that the magnetic pigments in the first to-be-magnetized composition are arranged in parallel at an angle of 0-15°, obtaining a first pattern.

9. The magnet design method according to claim 8, wherein The step of magnetizing the second to-be-magnetized composition by the rotated first and second magnetic field generating groups to obtain a second magnetized composition, the front color and side color of the second magnetized composition are opposite to those of the first magnetized composition, forming reversible color, comprises: placing the second to-be-magnetized composition at the magnet gap in the rotated first magnetic field generating group for magnetization and solidification, so that the magnetic pigments in the second to-be-magnetized composition are arranged vertically at an angle of 75-90°, obtaining a second pattern; wherein, the front color and side color of the first and second patterns are opposite, forming reversible color.

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