JP4283817B2 - Method for manufacturing pattern forming apparatus - Google Patents

Description

In the present invention, for example, a magnetic material is oriented by applying a magnetic field during or after coating of a paint containing a flaky magnetic material on a non-magnetic material, and a pattern is formed by the orientation of the magnetic material. The present invention relates to a method of manufacturing a pattern forming apparatus for forming a pattern.

Conventionally, after applying a coating containing magnetic powder on the surface of an object to be coated (the object to be coated), the magnetic powder is oriented by a magnetic field (magnetic field energy) based on a magnet, and a pattern coating in which characters and figures have emerged. Proposals have been made to form films. Specifically, an apparatus for manufacturing a molded article on which such a pattern coating film is formed is known (see, for example, Patent Document 1). The manufacturing apparatus according to the present invention includes a supporting unit that supports the molded product body, and a coating film forming unit that forms a coating film by applying a transparent or translucent liquid paint mixed with flaky magnetic material on the surface of the molded product body. The magnetic field forming means for forming the magnetic field acting on the magnetic substance in the coating film and the magnetic field changing means for changing the magnetic field are included. In this case, the magnetic field forming means is arranged such that adjacent first magnets and second magnets are arranged at a non-contact distance, and extends from the N pole of the first magnet to the S pole of the second magnet ( Magnetic field lines) are formed.
JP-A-5-337424 (pages 2 and 4)

  However, in the magnetic field forming means of the manufacturing apparatus described in Patent Document 1, the direction of the lines of magnetic force due to the magnetic field is approximately the center of the contour line forming the pattern, that is, between the edges of the first magnet and the second magnet. It is set so as to be substantially parallel to the coating film surface at a substantially central portion. In other words, the extreme value (maximum value) of the lines of magnetic force from the north pole to the south pole is located at a substantially central portion between both end edges of the first magnet and the second magnet. Therefore, the pattern based on the orientation of the magnetic material by the magnetic field is wide and blurry, and a clear feeling cannot be obtained. In addition, the orientation of the magnetic substance existing in the inner part of the coating film has the same result, so that the depth of the pattern cannot be obtained, and the moving feeling (movement feeling) indicating the movement of the pattern depending on the viewing angle can be satisfied. There was a problem that a satisfactory result could not be obtained.

Accordingly, an object of the present invention is to provide a manufacturing method of a pattern forming apparatus capable of forming a pattern having excellent sharpness, depth, and moving feeling with a coating film containing a magnetic substance.

In order to achieve the above object, the pattern forming apparatus manufacturing method according to the first aspect of the present invention is configured such that the side surfaces of the sheet-like magnets are in contact with each other so that the magnetic poles on the front and back surfaces of adjacent sheet-like magnets are different from each other. The adjacent sheet magnets separate the plastic magnet sheets before magnetization along a predetermined front and back asymmetric pattern, magnetize the separated sheets in the direction of the magnetic field lines different from the original sheets, and further magnetize The sheet-like magnet is formed by applying a coating material containing a flat magnetic substance on the object to be coated, which is obtained by fitting the subsequent separation sheet back to the separation mark of the original sheet. A magnetic field is applied to the coating film by the sheet magnet, the magnetic material in the coating film is oriented by the magnetic field, and the magnetic material is oriented substantially parallel to the coating film surface at the contact portion of the sheet magnet. At least on its magnetic body Rinurimaku is characterized in that it is configured to form a pattern.

According to a second aspect of the present invention, there is provided a method for manufacturing a pattern forming apparatus according to the first aspect, wherein the pattern is a magnetic field that closes between the magnetic poles of the sheet-like magnets that appear at the contact portion of the adjacent sheet-like magnets. It is formed by the magnetic body orientated by.

According to a third aspect of the present invention, there is provided a method of manufacturing a pattern forming apparatus according to the first or second aspect of the present invention, wherein the extreme values of the magnetic lines of force closing between the magnetic poles of the adjacent sheet magnets are adjacent to each other. It is in the contact part.

According to the present invention, the following effects can be exhibited.
In the pattern forming apparatus manufactured by the method of manufacturing a pattern forming apparatus according to claim 1, the side surfaces of the sheet magnets are brought into contact so that the magnetic poles of the front and back surfaces of adjacent sheet magnets are different from each other. Has been. The adjacent sheet magnets separate the plastic magnet sheet before magnetization along a predetermined front and back asymmetric pattern, magnetize the separation sheet in a direction of magnetic field different from the original sheet, and further separate the separated sheet after magnetization Is fitted back to the separation mark of the original sheet. And the said sheet-like magnet is arrange | positioned along the coating-film surface formed by apply | coating the coating material containing a flat-shaped magnetic body on a to-be-coated object, and a magnetic field is applied to a coating film with this sheet-like magnet . For this reason, the direction of the magnetic field lines based on the magnetic field changes before and after the contact portion of the sheet magnet. The magnetic body in the coating film is oriented along the direction of the magnetic lines of force, and the magnetic body at the contact portion of the sheet magnet is oriented substantially parallel to the coating film surface. As a result, the direction of the light reflected by the magnetic body at the contact portion of the sheet-like magnet is aligned, and strong reflected light is obtained, which is clearly distinguished from other portions. In addition, the magnetic substance existing in the innermost part of the coating film is also aligned in the same direction as the magnetic substance existing in the surface part. Therefore, the pattern by the coating film in the contact part of the magnet appears clearly, and at the same time, a pattern having excellent depth feeling and moving feeling can be formed. Moreover, a sheet-like magnet can be configured easily.

In the pattern forming apparatus manufactured by the method for manufacturing a pattern forming apparatus according to claim 2, the pattern is formed by a magnetic material oriented by a magnetic field appearing at a contact portion of adjacent sheet magnets. . Therefore, the effect of the invention according to claim 1 can be exhibited particularly at the contact portion of the sheet-like magnet.

In the pattern forming apparatus manufactured by the pattern forming apparatus manufacturing method according to the third aspect of the present invention, the extreme value of the magnetic lines of force closing between the magnetic poles of the adjacent sheet magnets is in the contact portion of the adjacent sheet magnets. Therefore, the magnetic lines of force extend in the direction along the coating film surface at the contact portion of the adjacent sheet magnets, and the magnetic body in the coating film also extends in that direction, so that it is clearly distinguished from other parts. Therefore, the effect of the invention which concerns on Claim 1 or Claim 2 can be improved further in the contact part of a sheet-like magnet.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments that are considered to be the best of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 2 and FIG. 3 (d), in the pattern forming apparatus, one of the plurality of sheet-shaped magnets is formed in a planar quadrangular shape (square shape), and a circular shape is formed at the center thereof. The other sheet-like magnet 12 is formed and fitted. Here, the sheet shape is a concept including not only a sheet shape but also a thickness called a film shape or a plate shape. The shape of the sheet-like magnet 11 is not limited to a square shape, and may be any shape other than a polygonal shape such as a triangular shape or a hexagonal shape, a circular shape, or an elliptical shape. The shape of the sheet magnet 12 determines the shape of the pattern, and may be any shape such as a figure other than a circular shape, a letter such as an N shape, and an A shape.

  The surface of the circular sheet-shaped magnet 12 (the upper surface in FIG. 1 or FIG. 3D) is the N pole, and the back surface (the lower surface in FIG. 1 or FIG. 3D) is the S pole. The rectangular sheet-shaped magnet 11 located around the surface has an S pole on the front surface and an N pole on the back surface. That is, the magnetic poles on the front surface and the back surface of the adjacent circular sheet magnet 12 and the rectangular sheet magnet 11 are different from each other. Furthermore, the outer peripheral surface (side surface) 13 of the sheet-shaped magnet 12 having a circular shape and the inner peripheral surface (side surface) 14 of the sheet-shaped magnet 11 having a circular hole at the center and having a quadrangular shape are in close contact (contact). Yes. FIG. 3D is a cross-sectional view taken along line 3d-3d in FIG.

  Such a pattern forming apparatus is manufactured as follows. As shown in FIG. 3A, the quadrangular sheet-like magnet 11 is formed of a plastic magnet sheet and is magnetized so that the front surface has an S pole and the back surface has an N pole. Next, as shown in FIG. 3B, a circular sheet-shaped magnet (separation sheet) 12 is formed by punching so as to form a circular pattern in the center of the sheet-shaped magnet 11. At this time, a separation hole 15 is formed in the separation mark of the circular sheet-like magnet. Subsequently, as shown in FIG. 3C, the circular sheet-like magnet 12 is reversed. Finally, as shown in FIG. 3D, the inverted circular sheet magnet 12 is fitted back into the separation hole 15 of the original sheet magnet 11. In this manner, a pattern forming apparatus in which the magnetic poles of both sheet magnets 11 and 12 are reversed is obtained. In this case, since the said pattern is circular shape, it is a front-back symmetrical shape.

  The pattern forming apparatus can be manufactured by the following method. In other words, by preparing a plastic magnet sheet before magnetization, which becomes a quadrangular sheet-like magnet, and punching out so as to form a circular pattern at the center, the sheet that becomes a circular sheet-like magnet is separated. The The separation sheet is magnetized in the direction of the magnetic field different from that of the original sheet. Subsequently, the magnetized separation sheet is fitted back into the separation hole of the original sheet to obtain a pattern forming apparatus in which the magnetic poles are reversed.

  Next, as shown in FIG. 1, a pattern-forming paint containing a flat magnetic material (hereinafter also simply referred to as paint) is applied onto a plate-like object 16 made of a non-magnetic material. While the coating film 17 is formed, the said sheet-like magnets 11 and 12 are arrange | positioned along this coating-film surface (coating-film surface). That is, the sheet-like magnets 11 and 12 are attached to the back surface of the article 16 with an adhesive tape, or the sheet-like magnets 11 and 12 are arranged at a certain distance above the coating film 17. In this state, the magnetic field generated by the sheet magnets 11 and 12 acts on the magnetic body in the coating film 17.

  The paint will be described. The paint contains a thermoplastic resin, a flat magnetic body, and a specific solvent. The thermoplastic resin is a resin that has good solubility in a solvent and has a viscosity characteristic that allows the viscosity to increase exponentially as the solvent is volatilized from the solution. As the thermoplastic resin having such a viscous characteristic, a vinyl acetate resin, an acrylic resin, or a cellulose acetate butyrate resin is preferable. Examples of the vinyl acetate resin include vinyl acetate-vinyl chloride copolymer resin and ethylene-vinyl acetate copolymer resin.

  The magnetic material is used for applying a pattern to the coating film when the coating material is applied to an object to be coated, or after that, when a magnetic field is applied, the magnetic material is oriented along the lines of magnetic force. Therefore, as the magnetic material, a flat material such as a flake shape, a plate shape, a sheet shape, or a film shape is used so that light can be reflected. This magnetic material is formed of a known ferromagnetic material such as iron oxide, nickel, cobalt, or an alloy thereof. The magnetic body has a length of about 1 to 80 μm and a thickness of about 0.1 to 20 μm.

  The specific solvent contains a low-boiling solvent having a boiling point of 50 ° C. or more and 100 ° C. or less and a high-boiling solvent having a boiling point of more than 100 ° C. and 200 ° C. or less. Immediately after applying the paint to the object to be coated by combining a low boiling point solvent and a high boiling point solvent and setting the solid content to a relatively low range of 5 to 15% by mass as described later, the coating film on the object to be coated The low-boiling point solvent volatilizes rapidly with time, and the viscosity of the coating film increases exponentially by increasing the solid content. For this reason, immediately after the coating material is applied to the object, the magnetic material in the coating material is easily oriented by the magnetic field, and thereafter, the orientation state of the magnetic material is easily maintained.

  As the low boiling point solvent, methyl ethyl ketone (boiling point 79.6 ° C.), ethyl acetate (boiling point 76.8 ° C.), acetone (boiling point 57 ° C.) or the like is used. Examples of the high boiling point solvent include methyl isobutyl ketone (boiling point 116.7 ° C.), n-butyl acetate (boiling point 126.3 ° C.), xylene (boiling point 142 ° C.), diisobutyl ketone (boiling point 168.2 ° C.), and the like.

  As the high-boiling solvent, it is preferable to use a combination of a first high-boiling solvent having a boiling point exceeding 100 ° C. and 150 ° C. or less and a second high-boiling solvent having a boiling point exceeding 150 ° C. and not more than 200 ° C. The amount of volatilization of the solvent later can be finely adjusted, which is preferable from the viewpoint that the viscosity of the paint can be easily controlled. Examples of the first high-boiling solvent include methyl isobutyl ketone (boiling point 116.7 ° C.), n-butyl acetate (boiling point 126.3 ° C.), and xylene (boiling point 142 ° C.). Examples of the second high-boiling solvent include ethylene glycol monobutyl ether (boiling point 192 ° C.) and diisobutyl ketone (boiling point 168.2 ° C.).

  In the paint, it is preferable to contain a dye or a pigment as a colorant because the decorative feeling due to the pattern of the coating film can be enhanced. Examples of such dyes include monoazo, disazo, metal complex azo, anthraquinone, indigo, and phthalocyanine dyes. Examples of the pigment include organic pigments such as azo lake, insoluble azo, condensed azo, and phthalocyanine, yellow iron oxide, bengara, carbon black, interference mica as a bright pigment, and colored mica. Moreover, hardening agents, such as an amino resin, an isocyanate compound or its block body, an epoxy compound, and polycarbodiimide, can be mix | blended with a coating material, and the said thermoplastic resin etc. can be hardened. Furthermore, components generally blended in paints such as antioxidants, leveling agents, antifoaming agents, thickeners, ultraviolet absorbers and the like can be blended in the paint.

  Describing the blending amount of each component, the thermoplastic resin is preferably 60 to 93% by mass and the magnetic substance is preferably 7 to 35% by mass in the solid content of the paint. Moreover, the dye and pigment as a coloring agent are mix | blended in the range of 0-33 mass% in solid content of a coating material. The non-volatile content (solid content) of the paint is preferably 5 to 15% by mass in order to lower the viscosity at the initial stage after application of the paint and promote the orientation of the magnetic substance by the magnetic field. When the non-volatile content is less than 5% by mass, the viscosity does not rise sufficiently even after a lapse of time after the coating is applied, and it becomes difficult for the coating to sagg and maintain the orientation of the magnetic material. On the other hand, if it exceeds 15% by mass, the viscosity at the initial stage after application of the paint cannot be sufficiently lowered, which is not preferable.

  The coating material as described above is prepared by preparing a thermoplastic resin solution, and then preparing a coating material base material by blending a magnetic material. Then, the coating material base material is a diluted solvent in which the low boiling point solvent and the high boiling point solvent described above are mixed. It is manufactured by diluting with. As a composition of a dilution solvent, it is preferable that a low boiling point solvent is 40-75 mass%, a 1st high boiling point solvent is 5-10 mass%, and a 2nd high boiling point solvent is 20-55 mass%. The coating material having such a composition is usually set to a low viscosity of 60 to 80 mPa · s, and can be easily applied.

  The paint is normally applied to the surface of the article to be coated, and the viscosity after 20 to 60 seconds is preferably set to 2,000 to 500,000 mPa · s. Thus, by setting the viscosity at the initial stage after application of the paint to a relatively low viscosity, the orientation of the magnetic substance can be made to follow the magnetic field lines when a magnetic field is applied. Here, the normal state means an atmosphere (environment) having a temperature of 15 to 35 ° C. and a relative humidity of 40 to 90%. When the viscosity is less than 2,000 mPa · s, the viscosity of the coating material is low, the fluidity of the applied coating material is large, the coating material is sagging and the coating operation becomes difficult, and the desired coating film thickness is obtained. Disappear. On the other hand, if it exceeds 500,000 mPa · s, the paint becomes highly viscous and the orientation of the magnetic material is hindered, making it impossible to make the coating pattern clear.

  Further, the viscosity between 60 seconds and 120 seconds after coating is preferably set to 100,000 mPa · s or more. The viscosity of 100,000 mPa · s or more is meant to include a state where the viscosity cannot be measured due to high viscosity and a solidified state. By setting the viscosity at this stage to a high viscosity, the oriented magnetic body can be fixed in that state. When the viscosity is less than 100,000 mPa · s, the orientation of the magnetic material oriented by the magnetic field is not maintained as it is, and the disorder of the orientation occurs and the desired coating pattern cannot be obtained. And it sets so that the viscosity between 60 seconds after 60 seconds after application | coating may become larger than the viscosity after 20-60 seconds. That is, the latter viscosity is set to be higher than the initial viscosity after the coating is applied, and the orientation of the magnetic substance and its fixation are achieved by such viscosity setting. The coating film thus obtained has a dry film thickness of about 5 to 50 μm.

  In FIG. 1, a magnetic field line (magnetic field) 18 that closes from the north pole of the circular sheet-like magnet 12 to the south pole of the quadrangular sheet-like magnet 11 is indicated by an arrow. As indicated by the arrows, the magnetic force lines 18 are oriented substantially parallel to the coating surface at the contact portions 19 of the two sheet magnets 11 and 12. In other words, the extreme value (maximum value) of the magnetic lines 18 that close between the magnetic poles of the adjacent sheet magnets 11 and 12 is located at the contact portion 19 of the adjacent sheet magnets 11 and 12. For this reason, based on the magnetic field by the adjacent sheet magnets 11 and 12, the magnetic material dispersed in the coating film 17 on the workpiece 16 is oriented in the direction in which the lines of magnetic force 18 extend. Therefore, the magnetic body is oriented substantially parallel to the coating surface at the contact portion 19 of both the sheet magnets 11 and 12. As a result, the light from above the coating film 17 is most easily reflected by the magnetic material in the coating film 17 at the contact portion 19 of both the sheet-like magnets 11 and 12, and can be viewed brightly and clearly.

  Here, the reason why the pattern of the coating film 17 can exhibit a clear feeling, a deep feeling, and a moving feeling by using the pattern forming apparatus in the present embodiment will be described with reference to FIGS. 4 and 5. When viewed from directly above the coating film 17, a clear annular pattern 21 can be seen as represented by the solid line in FIG. 5. When the eyes are tilted to the right, the annular pattern 21 moves (moves) to the right (two-dot chain line in FIG. 5). The distance L that the pattern 21 has moved is the moving distance.

  As shown in FIG. 4, when the eye 22 is viewed from directly above the coating film 17, the incident light 24 a is reflected by the magnetic body 23 oriented in the horizontal direction by the magnetic body 23 in the coating film 17 and reflected. The light 24 b is directed straight up and enters the eye 22. At this time, since the magnetic bodies 23 oriented in the horizontal direction are aligned, the reflected light 24b is strengthened. Therefore, the annular pattern 21 can be clearly seen. Further, the magnetic material 23 in the innermost part (lower part of FIG. 4) of the coating film 17 is also horizontally oriented, and the reflected light 24b from the magnetic material 23 is also visible, so that the pattern 21 has a sense of depth.

  Subsequently, when the eye 22 is tilted to the right (about 45 degrees), the incident light 24a to the magnetic body 23 tilted to the right (about 22.5 degrees) of the magnetic body 23 is reflected. The reflected light 24 b is recognized by the eyes 22. Also at this time, since the magnetic bodies 23 inclined to the right are aligned at that angle, the reflected light 24b is strengthened and the pattern 21 can be clearly seen. Therefore, the pattern 21 is recognized as having moved by the moving distance L.

  On the other hand, as shown in FIG. 6, a gap 20 is provided between the inner peripheral surface 14 of the sheet magnet 11 and the outer peripheral surface 13 of the sheet magnet 12 without contacting the adjacent sheet magnets 11 and 12. In this case, the radius (curvature radius) of the arc drawn by the magnetic lines 18 closing between the two sheet magnets 11 and 12 becomes large. Moreover, the position where the direction of the magnetic force line 18 is substantially parallel to the surface of the coating film is between the substantially central portion of the contour line forming the pattern, that is, between the inner peripheral surface 14 of the sheet magnet 11 and the outer peripheral surface 13 of the sheet magnet 12. It is a substantially central part. For this reason, the pattern based on the orientation of the magnetic body 23 is wide and blurred. Furthermore, the orientation of the magnetic body 23 existing in the innermost part of the coating film 17 is the same as the orientation of the magnetic body 23 on the surface portion, and a sense of depth of the pattern cannot be obtained, and a feeling of moving cannot be obtained.

  This will be further described with reference to FIG. In the case of FIG. 7, a certain degree of directionality is recognized in the magnetic body 23, but it is not neatly arranged, so that the eye 22 is viewed from right above the coating film 17 and tilted to the right. Sometimes the reflected light 24b is not aligned and the pattern 21 cannot be clearly recognized. Therefore, even if there is a part where the pattern 21 can be clearly seen by moving the eyes 22, it is partial, and its position is not fixed and virtually no moving is seen.

  Now, the operation of the present embodiment will be described. The pattern forming apparatus is configured by contacting the sheet magnets 11 and 12 so that the magnetic poles on the front and back surfaces of the adjacent sheet magnets 11 and 12 are different from each other. A coating material 17 containing a magnetic material 23 is applied to the surface of the object 16 to form a coating film 17, and sheet magnets 11 and 12 are attached to the back surface of the object 16. , 12 applies a magnetic field to the coating film 17. A line of magnetic force 18 due to this magnetic field extends from the N pole of one sheet-like magnet 12 to the S pole of the other sheet-like magnet 11 and exhibits an extreme value at the contact portion 19 of both sheet-like magnets 11 and 12.

  At this time, the magnetic body 23 dispersed in the coating film 17 is oriented in the direction in which the magnetic force lines 18 extend, and the magnetic body 23 at the contact portion 19 of the sheet magnets 11 and 12 is oriented substantially parallel to the coating film surface. The Therefore, the direction of the light reflected on the magnetic body 23 at the contact portion 19 of the sheet magnets 11 and 12 is aligned, and the intensity of the reflected light is increased at the boundary line. Moreover, the magnetic body 23 existing in the innermost part of the coating film 17 is also oriented so as to be aligned in the same direction as the magnetic body 23 existing in the surface part. For this reason, strong reflected light is obtained also from the magnetic body 23 located in the innermost part of the coating film 17. In addition, even when the angle at which the pattern is viewed is changed, strong reflected light is obtained in that direction, and the pattern can be recognized as moving.

The effects exhibited by the above embodiment will be described collectively below.
The pattern forming apparatus of the present embodiment is configured such that the sheet magnets 11 and 12 are in contact with each other so that the magnetic poles on the front and back surfaces of the adjacent sheet magnets 11 and 12 are different from each other. Arranged along the surface. And the magnetic body 23 in the contact part 19 of both the sheet-like magnets 11 and 12 is orientated substantially parallel to the coating-film surface. Therefore, in particular, the pattern by the coating film 17 at the contact portion 19 of the sheet magnets 11 and 12 appears clearly, and at the same time, a pattern excellent in depth and moving feeling can be formed. Furthermore, since the magnetic bodies 23 are aligned in the same direction at each position other than the contact site 19 of the sheet magnets 11 and 12, the same effect as the contact site 19 can be exhibited.

  The pattern is formed by the magnetic body 23 oriented by the magnetic field appearing at the contact portion 19 of the adjacent sheet magnets 11 and 12, so that the above-described effect can be achieved particularly by the contact portion of the sheet magnets 11 and 12. 19 can be demonstrated.

  The magnetic field line 18 is in contact with the adjacent sheet-shaped magnets 11, 12 because the extreme value of the magnetic field line 18 closing between the magnetic poles of the adjacent sheet-shaped magnets 11, 12 is in the contact portion 19 of the adjacent sheet-shaped magnets 11, 12. The part 19 extends in a direction along the coating film surface, and the magnetic body 23 in the coating film also extends in that direction, so that it is clearly distinguished from other parts. Therefore, the above effect can be further improved at the contact portion 19 of the sheet magnets 11 and 12.

  The quadrangular sheet-shaped magnet 11 separates the plastic magnet sheet before magnetization along a predetermined pattern, and the circular sheet-shaped magnet 12 as the separation sheet has a different magnetic force line direction from the original sheet-shaped magnet 11. Further, the magnetized sheet-like magnet 12 is configured to be fitted back into the separation hole 15 of the original sheet-like magnet 11. According to this method, the sheet-like magnets 11 and 12 can be easily configured.

  In addition, the pattern forming apparatus separates the magnetized sheet-shaped magnet 11 along a circular pattern to form a circular sheet-shaped magnet 12, and then reverses the reversed sheet-shaped magnet 12. It is configured to be fitted back into the separation hole 15 of the original sheet magnet 11. According to this method, the sheet magnets 11 and 12 can be easily obtained by a single magnetization operation.

  Hereinafter, the embodiment will be described in more detail with reference to examples and comparative examples, but the invention is not limited to these examples. In each example, unless otherwise specified, parts represent parts by mass, and% represents mass%.

First, the following three types of coating base materials were prepared.
(Paint A)
In a stainless steel container equipped with a stirrer, 384.2 parts of methyl isobutyl ketone (MIBK) and 164.5 parts of methyl ethyl ketone (MEK) were charged and a vinyl acetate-vinyl chloride copolymer resin (manufactured by Dow Chemical Company) was stirred. , 128.1 parts of trade name VMCH) to prepare a resin solution. Thereto, 71.9 parts of xylene and 18 parts of a dye (trade name Plast Blue 8550, manufactured by Arimoto Chemical Industry Co., Ltd.) were added and dissolved with sufficient stirring. Next, 22.5 parts of magnetic material (iron oxide, plate-like or flake-like, manufactured by Titanium Industry Co., Ltd., trade name AM-200) was supplied, and 210.8 parts of n-butyl acetate was added while stirring. The paint A was obtained by sufficiently stirring. The non-volatile content of the paint A was 17%.
(Paint B)
By the same method as the method for producing the coating material A, the following raw materials were sequentially supplied to obtain a coating material B. The non-volatile content of the paint B was 17%.

Acrylic resin solution a shown below 120 parts Acrylic resin solution b shown below 90 parts Rheology agent (trade name AZS-522, manufactured by Nippon Paint Co., Ltd.) 40 parts Anthraquinone dye (same as paint A) 20 parts Magnetic substance ( Titanium Kogyo Co., Ltd., trade name AM-200) 22 parts ethyl acetate 245 parts xylene 100 parts n-butyl acetate 286 parts (paint C)
By the same method as the method for producing the coating material A, the following raw materials were sequentially supplied to obtain a coating material C. The nonvolatile content of the paint C was 17%.

Acrylic resin solution a shown below 120 parts Acrylic resin solution b shown below 90 parts Rheology agent (Nippon Paint Co., Ltd., trade name AZS-522) 40 parts Phthalocyanine pigment paste 20 parts (Nippon Bee Chemical Co., Ltd.) 16.5 parts of a phthalocyanine pigment, 57.0 parts of an acrylic resin solution a shown below, 2.3 parts of ethylene glycol monobutyl ether, 8.8 parts of methyl isobutyl ketone, and 8.8 parts of toluene. %, Pigment concentration in pigment paste 16.5%, pigment concentration in solid content of pigment paste 34.4%)
Magnetic material (trade name AM-200, manufactured by Titanium Industry Co., Ltd.) 22 parts Ethyl acetate 230 parts Xylene 90 parts N-butyl acetate 253 parts (acrylic resin solution a)
A polymerization reaction vessel equipped with a stirrer, thermometer, reflux tube, dropping funnel, nitrogen introduction tube and thermostat-equipped heating device was charged with 17 parts of toluene and 10 parts of n-butyl acetate and gradually raised to 110 ° C. while stirring. Warm up. Subsequently, 40 parts of methyl methacrylate, 15 parts of styrene, 7 parts of 2-hydroxyethyl methacrylate, 37 parts of ethylhexyl acrylate and 1 part of methacrylic acid, 15 parts of toluene, 5 parts of n-butyl acetate and t-butyl A polymerization initiator solution consisting of 0.8 part of peroxy-2-ethylhexanate was placed in separate dropping funnels and dropped over 3 hours to carry out a polymerization reaction. During this time, the polymerization reaction solution was maintained at 110 ° C. with stirring.

  Subsequently, a polymerization initiator solution consisting of 5 parts of toluene, 5 parts of n-butyl acetate and 0.2 part of t-butylperoxy-2-ethylhexanate was prepared while maintaining the temperature of the polymerization reaction solution at 110 ° C. The solution was added dropwise over time to complete the polymerization reaction. Thereafter, the temperature of the polymerization reaction solution was cooled to 80 ° C., 33 parts of toluene and 10 parts of n-butyl acetate were charged in this order to obtain an acrylic resin solution (acrylic resin varnish) a. The resin solid content of this acrylic resin solution a was 50%, and the mass average molecular weight was 49,000 as measured by gel permeation chromatography in terms of styrene. The resin solid content was measured as follows.

Resin solid content (%) = (Y / X) × 100
X: Sample amount of acrylic resin solution a (g)
Y: Mass (g) after the acrylic resin solution a sample was dried in a drying furnace at 110 ° C. for 3 hours
(Acrylic resin solution b)
In a polymerization reaction vessel equipped with a stirrer, thermometer, reflux tube, dropping funnel, nitrogen introducing tube and thermostat-equipped heating apparatus, 20 parts of xylene and 10 parts of MIBK were charged, and the temperature was gradually raised to 130 ° C. while stirring. Next, 61 parts of methyl methacrylate, 15 parts of styrene, 2.5 parts of 2-hydroxyethyl methacrylate, 20 parts of ethylhexyl acrylate and 1.5 parts of methacrylic acid, 20 parts of xylene, 10 parts of MIBK and t-butyl A polymerization initiator solution consisting of 1.1 parts of peroxy-2-ethylhexanate was placed in separate dropping funnels and dropped over 3 hours to carry out a polymerization reaction. During this time, the polymerization reaction solution was maintained at 130 ° C. with stirring.

Subsequently, a polymerization initiator solution consisting of 10 parts of xylene, 5 parts of MIBK, and 0.4 parts of t-butylperoxy-2-ethylhexanate was dropped over 2 hours while maintaining the temperature of the polymerization reaction solution at 130 ° C. And the polymerization reaction was completed. Thereafter, the temperature of the polymerization reaction solution was cooled to 80 ° C., and 10 parts of xylene and 15 parts of MIBK were charged in order to obtain an acrylic resin solution (acrylic resin varnish) b. The resin solid content of this acrylic resin solution b was 50%, and the mass average molecular weight was 16,000 as measured by gel permeation chromatography in terms of styrene. In addition, the measuring method of resin solid content is the same as the case of the acrylic resin solution a.
(Diluted solvent)
Next, three kinds of dilution solvents α, β and γ as shown in Table 1 were prepared using methyl ethyl ketone, ethyl acetate, n-butyl acetate and diisobutyl ketone.

（実施例１）
被塗物１６として市販のＡＢＳ樹脂板（黒色、縦２０ｃｍ、横１５ｃｍ及び厚さ０．１ｃｍ）を４枚用意し、イソプロピルアルコールで塗布表面を拭いた。一方、シート状磁石として、着磁済みの四角形状をなすシート状磁石（一辺が６５ｍｍの正方形、厚さ２．１ｍｍ）１１の中心部を円形状に切り抜いて分離した後反転し、該反転された円形状のシート状磁石（分離シート、直径４０ｍｍ）１２を元のシート状磁石１１の分離孔１５に嵌め戻したものを使用した。つまり、シート状磁石１１の内周面１４とシート状磁石１２の外周面１３とが接触されたものを使用した。このシート状磁石１１、１２を、塗料の塗布前にＡＢＳ樹脂板の裏面に円形状のシート状磁石１２のＮ極側を接触させて粘着テープにより貼り付けた。それを模様塗膜用のテストピースとした。ＡＢＳ樹脂板の残りの３枚は、塗布後３０秒後、６０秒後及び９０秒後における塗料の粘度測定用とした。実施例１の模様形成用塗料を、前記塗料Ａ１００部と希釈溶剤α１００部とを混ぜて撹拌し、調製した。この模様形成用塗料の塗布時における不揮発分は８．５％であった。

Example 1
Four commercially available ABS resin plates (black, 20 cm long, 15 cm wide and 0.1 cm thick) were prepared as the object to be coated 16, and the coated surface was wiped with isopropyl alcohol. On the other hand, as a sheet-like magnet, the center part of a magnetized square-shaped sheet-like magnet (square with a side of 65 mm, thickness 2.1 mm) 11 is cut out into a circular shape and separated, and then reversed. A circular sheet-like magnet (separation sheet, diameter 40 mm) 12 fitted into the separation hole 15 of the original sheet-like magnet 11 was used. That is, the one in which the inner peripheral surface 14 of the sheet magnet 11 and the outer peripheral surface 13 of the sheet magnet 12 are in contact with each other was used. The sheet-like magnets 11 and 12 were attached with an adhesive tape with the N-pole side of the circular sheet-like magnet 12 in contact with the back surface of the ABS resin plate before application of the paint. This was used as a test piece for a pattern coating film. The remaining three ABS resin plates were used for measuring the viscosity of the paint 30 seconds, 60 seconds and 90 seconds after application. The pattern forming coating material of Example 1 was prepared by mixing 100 parts of the coating material A and 100 parts of the dilution solvent α and stirring them. The non-volatile content at the time of application of the pattern forming paint was 8.5%.

  Then, in an atmosphere of 20% relative humidity (RH) at 65%, a spray gun (trade name Wider 100 manufactured by Anest Iwata Co., Ltd.) is used to apply the pattern forming paint onto the surface of the four ABS resin plates. Then, spray coating was performed so that the dry film thickness was 10 μm. About the test piece for pattern coating films, it was left to stand in said atmosphere for 10 minutes. On the other hand, for the three ABS resin plates for viscosity measurement, the coating film 17 was immediately scraped off after 30 seconds, 60 seconds and 90 seconds after spray coating in the above atmosphere, and the RR viscometer and RL were sealed in a sealed state. Viscosity was measured using a type viscometer (both manufactured by Toki Sangyo Co., Ltd., trade name VISCOMETER CONTROLLER RC-500). The measurement method is “spring relaxation measurement”, and measurement was performed at 20 ° C. and a shear rate of 0.1 (1 / sec) over 60 seconds. The results are shown in Table 2. As shown in Table 2, the viscosity of the paint (coating film) after application for 30 seconds is 76,000 mPa · s, the viscosity of the paint after 60 seconds is 220,000 mPa · s, and the viscosity of the paint after 90 seconds is very high The viscosity was not measurable with the viscometer.

  The test piece for the pattern coating film was allowed to stand for 10 minutes and then applied with a clear paint so that the dry film thickness was 30 μm, left for 10 minutes, placed in a drying furnace, and dried at 80 ° C. for 30 minutes. In addition, the magnet stuck on the back surface of the ABS resin plate was removed before applying the clear paint. The clear paint includes 100 parts of the main agent (manufactured by Nippon Bee Chemical Co., Ltd., trade name R240CI), 16 parts of a curing agent (trade name R255, produced by Nihon Bee Chemical Co., Ltd.) and a diluent solvent (Nihon Bee Chemical Co., Ltd.). What mixed and stirred 30 parts of Chemical Co., Ltd. product brand R240 dilution thinner) was used.

About the pattern coating film thus obtained, the clearness, depth, moving feeling and skin smoothness are obtained by averaging the visual judgments of 10 painters, designers, etc., according to the criteria shown below. It was. Furthermore, the adhesion of the coating film was measured by the method shown below. The results are shown in Table 2.
(Clear feeling)
(Double-circle): The boundary part of the pattern was seen very clearly. ○: The border of the pattern was clearly visible. (Triangle | delta): The boundary part of the pattern looked somewhat faint. X: The boundary part of the pattern was blurred.
(Deep feeling)
A: Depth was felt in the pattern, and the sense of depth was very excellent. ○: Depth was felt in the pattern, and the sense of depth was good. (Triangle | delta): The depth was not fully felt in the pattern and the feeling of depth was insufficient. X: Depth was not felt in the pattern, and the sense of depth was lacking.
(Moving feeling)
A: When the eye position was moved, the boundary portion of the pattern moved, and the pattern was rich in change. ○: When the eye position was moved, the movement of the pattern boundary could be fully recognized. (Triangle | delta): Even if it moved the position of an eye, the movement of the boundary part of a pattern was not fully recognized. X: Even if the position of the eye was moved, the movement of the boundary part of the pattern could not be recognized, and the pattern change was poor.
(Skin smoothness)
○: The surface of the coating film was smooth and good. X: Rough skin was seen on the surface of the coating film, and it was defective.
(Adhesion)
In accordance with JIS K5400 8.5.2, cut with a cutter on the coating film to make 100 squares of 2 mm square grids, and stick adhesive tape on it, then peel off forcibly. The test was conducted and judged according to the following criteria.

○: The first square was not peeled off. X: The squares or more were peeled off.
(Examples 2 to 10 and Comparative Examples 1 and 2)
In Example 1, except that the type of paint, the type of dilution solvent, the shape of the sheet-like magnet, the arrangement of the sheet-like magnet, and the arrangement time of the sheet-like magnet were set as shown in Table 2, the same as in Example 1 Carried out. In Table 2, when the shape of the sheet-like magnet is N, the central part of the sheet-like magnet 11 having a square shape before magnetization is cut out and separated into an N-shape to obtain an N-shaped sheet-like magnet 12. The sheet magnet 12 was magnetized in the direction of the magnetic field different from that of the sheet magnet 11 having a quadrangular shape. Next, the N-shaped sheet magnet 12 fitted into the separation hole 15 of the original rectangular sheet-shaped magnet 11 was used. Moreover, when the arrangement | positioning of the sheet-like magnets 11 and 12 is a table | surface, the sheet-like magnets 11 and 12 were arrange | positioned in the distance of 1 mm above the coating film of the ABS resin board surface after application | coating of a coating material.

On the other hand, it carried out similarly to Example 1 about the case where the circular sheet-like magnet 12 is arrange | positioned independently (Comparative Example 1), and the case where the N-shaped sheet-like magnet is arrange | positioned independently (Comparative Example 2).
And about the obtained coating film 17, the sharpness, the deep feeling, the moving feeling, skin smoothness, and adhesiveness were measured similarly to Example 1, and those results were shown in Table 2.

表２に示したように、実施例１〜８では、くっきり感、深み感及びムービング感のいずれも非常に良好であった。これは、シート状磁石１１、１２が接触状態で配置され、シート状磁石１１、１２の接触部位１９に磁力線１８の極値が存在し、その位置における塗膜１７中の磁性体が塗膜面にほぼ平行に配向され、シート状磁石１１、１２の接触部位１９における磁性体に反射する光の方向が揃う結果であると考えられる。また、実施例９及び１０の場合には、塗料の種類及び塗布後の粘度変化により、実施例１〜８の場合に比べてくっきり感、深み感及びムービング感が若干低下したが、十分な装飾感が得られた。

As shown in Table 2, in Examples 1 to 8, all of the sharpness, depth, and moving feeling were very good. This is because the sheet-shaped magnets 11 and 12 are arranged in contact with each other, the extreme value of the magnetic force line 18 exists at the contact portion 19 of the sheet-shaped magnets 11 and 12, and the magnetic substance in the coating film 17 at that position is the coating film surface. It is thought that this is a result of aligning the directions of light reflected to the magnetic body at the contact portions 19 of the sheet-like magnets 11 and 12 aligned substantially parallel to each other. In the case of Examples 9 and 10, the sharpness, depth, and moving feeling were slightly reduced as compared with Examples 1-8 due to the type of paint and the change in viscosity after application. A feeling was obtained.

  On the other hand, in the case of the comparative example 1 in which the circular sheet-like magnets 12 are arranged alone, the sharpness deteriorates and the depth feeling and the moving feeling also deteriorate compared with the case of the embodiment 3 in which the circular arrangement is made. Further, in the case of Comparative Example 2 in which the N-shaped sheet-like magnets were arranged alone, the sharpness was worse than in the case of Example 5 in which the N-shaped sheet magnets were placed in contact with each other, and the feeling of depth and the feeling of movement were also lowered. In Comparative Examples 1 and 2, by arranging the magnets alone, the extreme values of the lines of magnetic force are away from the edges of the magnets, and the pattern based on the orientation of the magnetic material by the magnetic field is wide and blurry. I think that the.

In addition, this embodiment can also be changed and embodied as follows.
-It is also possible to use three or more sheet-like magnets, arrange them so that the magnetic poles of adjacent sheet-like magnets are different, and change the pattern by the coating film.

-When the surface of a to-be-coated object is a curved surface and the coating film is formed on it, a sheet-like magnet can be arrange | positioned along the surface of a coating film.
・ Measure the orientation of the magnetic material based on the relationship between the strength of the magnetic field of the sheet magnet and the thickness of the object to be coated, the thickness of the coating film, the concentration of the magnetic material, etc. Data can be used to form a desired pattern.

-As a magnetic material, a combination of a plurality of different materials or a combination of a plurality of different materials can be used to make the pattern more innovative.
Further, the technical idea that can be grasped from the embodiment will be described below.

The method for manufacturing a pattern forming apparatus according to any one of claims 1 to 3, wherein the object to be coated is formed in a sheet shape. When comprised in this way, the magnetic field of a sheet-like magnet can be made to act uniformly on the magnetic body in a coating film, and the effect of the invention concerning any one of Claims 1-3 can be improved.

The method for manufacturing a pattern forming apparatus according to any one of claims 1 to 3, wherein the coating surface is a flat surface. When comprised in this way, the excess reflected light in a coating-film surface can be eliminated, and the effect of the invention which concerns on any one of Claims 1-3 can be improved further.

Explanatory drawing which shows a magnetic force line when forming a coating film on the surface of a to-be-coated object, and arrange | positioning a sheet magnet on the back surface. The top view when arrange | positioning in the state which the inner peripheral surface of the square-shaped sheet-like magnet with an open circular hole, and the outer peripheral surface of a circular shaped sheet-like magnet were made to contact. (A)-(d) is explanatory drawing which shows the process of manufacturing a pattern formation apparatus with a sheet-like magnet in order. The schematic diagram for demonstrating the clear feeling of a pattern by the coating film in embodiment, a deep feeling, and a moving feeling. Explanatory drawing for demonstrating the pattern of the coating film in the embodiment, and its moving. Explanatory drawing which shows a magnetic force line when arrange | positioning a sheet magnet so that a clearance gap may be provided between the sheet magnets adjacent to a back surface while forming a coating film on the surface of to-be-coated material. The schematic diagram for demonstrating the reflective condition of the light with respect to the magnetic body in a coating film when a clearance gap is provided between adjacent sheet magnets.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Rectangular sheet-like magnet, 12 ... Circular sheet-like magnet, 13 ... Outer peripheral surface as side surface, 14 ... Inner peripheral surface as side surface, 15 ... Separation hole as separation trace, 16 ... 17 ... coating film, 18 ... magnetic field line, 19 ... contact site, 23 ... magnetic substance.

Claims (3)

Adjacent sheet-like magnets are configured by contacting the side surfaces of the sheet-like magnets so that the magnetic poles on the front and back surfaces are different from each other, and the adjacent sheet-like magnets have a predetermined asymmetrical pattern on the plastic magnet sheet before magnetization. The separated sheet is magnetized in the direction of the line of magnetic force different from that of the original sheet, and the separated sheet after being magnetized is fitted back to the separation mark of the original sheet, and is flattened on the object to be coated. The sheet-like magnet is disposed along the surface of the coating film formed by applying a paint containing a magnetic material, and a magnetic field is applied to the coating film by the sheet-like magnet. A pattern characterized in that the magnetic body is oriented, the magnetic body is oriented substantially parallel to the surface of the coating film at the contact portion of the sheet-like magnet, and the coating film forms a pattern with at least the magnetic body. Made in forming apparatus Method. 2. The pattern forming apparatus according to claim 1, wherein the pattern is formed of a magnetic material oriented by a magnetic field that closes between magnetic poles of the sheet-like magnets that appear at a contact portion of adjacent sheet-like magnets. Manufacturing method . The method of manufacturing a pattern forming apparatus according to claim 1, wherein an extreme value of a magnetic field line closing between the magnetic poles of the adjacent sheet magnets is present at a contact portion of the adjacent sheet magnets.

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