JPH03193162A - Formation of patterned coating film - Google Patents

Abstract

PURPOSE:To contrive the formation of a clear pattern on a coating film by a method wherein a collective set of a number of magnet pieces separated from one another is arranged on the reverse side of the material to be coated, the surface of the material is coated with the coating material contg. magnetic powder to form a coating film thereon and to harden this coating film. CONSTITUTION:There is formed an enchased pattern of the collective set 15 with a plurality of magnet pieces 14 arranged out of contact but close to one another. This collective set 15 is positioned into proximity with the reverse side of the material 10 to be coated. The surface of the material 10 is then coated with the coating material contg. magnetic powder to form a coating film 20 thereon. The coating material 20 is thereafter hardened to form a pattern 24 on the surface thereof according to the aforesaid corresponding enchased pattern. As a result, a clear pattern can be produced on the coating film and this offers a permanent pattern free from unevenness, peeling-off and fading- away.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for imparting a pattern to a painted surface, and in particular to a method for forming patterns such as various letters and figures on a painted surface in a color tone different from that of the surrounding area. It is related to.

(Prior art) A method of adding a pattern consisting of various letters, figures, etc. to a part of a painted surface is to paint the entire painted surface with the ground color, then mask some parts and paint them separately with a different paint. , a method of pasting a colored sheet or colored tape, and a method of forming unevenness on the object to be painted and then painting it with a single color to create shadows are used.

However, with these methods, the work of pasting masking tape is troublesome, extra time is required to repeat the painting, steps are created in the patterned area, making it unsightly, and the colored tape or colored sheet easily peels off. There were some drawbacks, such as shadows not being clearly expressed as patterns due to the nature of the light hitting the uneven parts.

JP-A-63-175670 ``Method for forming a patterned coating film'' discloses that a liquid coating film containing a powdered magnetic material is formed on the surface of an object to be coated or a colored coating film, and the coating film is brought into a fluid state. A method has already been described in which a pattern is formed by applying a magnet to a magnetic material in a desired portion of the coating film. According to this method, among the powdered magnetic material that is uniformly dispersed throughout the coating (3), the orientation of only the magnetic material in the part affected by the magnetic force is different from that in other parts.
A pattern matching the shape and size of the magnet will appear.

However, when actually painting using this method, it was found that a clear pattern matching the shape of the magnet could not be obtained. This will be explained with reference to the accompanying drawings. For example, as shown in FIG. 12, two bar magnets 91.
92 to intersect them in a T-shape and bring them close to the coating surface 93 in a fluid state as shown in FIG.
96,97,98, but these do not constitute a clear T-shaped pattern outline. This allows the magnetic material to move and change its orientation at the ends of the bar magnet where the magnetic force is strong, but in the middle part where the magnetic force is weak, the orientation of the magnetic material does not change and a pattern is formed. This is because it is not possible. In other words, it has been found that the desired pattern (a contour that can be distinguished from the area where the magnet is not applied (4)) cannot be obtained simply by applying a magnet.

(Problems to be Solved by the Invention) An object of the present invention is to improve the conventional method of forming a pattern by applying a magnet, and to provide a method that can form a clear pattern.

Another object of the present invention is to provide a method that makes it possible to form a pattern in any shape without being limited to the shape of the magnet itself.

(Means for Solving the Problems and Their Effects) In a first aspect of the present invention, a plurality of separated magnet pieces are arranged close to each other so as not to touch each other to form an aggregate in a scattered pattern, This assembly is positioned close to the back surface of the object to be coated, and then a coating material containing magnetic powder is applied onto the object to form a coating film, and then the coating film is cured and the dispersion is performed. To provide a method for forming a patterned coating film by which a pattern corresponding to a dotted pattern appears on a coating surface.

According to this method, the paint containing magnetic powder is applied onto the object while magnetic lines of force are formed between the separate magnet pieces that make up the aggregate, so the coating process The magnetic powder begins to move along the lines of magnetic force, and as the coating loses its fluidity, its movement speed slows down, and when it is completely cured, it is fixed in that position. Therefore, the magnetic powder is oriented along the direction of the lines of magnetic force, and a pattern corresponding to a dotted aggregate made of a plurality of magnet pieces is formed. However, this pattern does not necessarily match the shape of the magnet; by changing the orientation of the magnet pieces, the direction of the magnetic lines of force changes, making it possible to create subtle changes in color tone that differ from the shape of the magnet. Special effects will be obtained.

A large number of magnet pieces with various properties and shapes can be used, such as metal magnets, ferrite magnets, sintered magnets, and flexible magnets, and after forming these into small separate shapes and combining them, The assembly can be constructed using adhesive tape or supporting members.

In addition, the shape of the magnet pieces can be freely selected from small squares and circles to triangles and polygons, and by combining these shapes, it is possible to create any pattern.

In the present invention, an "aggregate of a plurality of magnet pieces" refers to an aggregate of - magnet pieces each having two or more N poles and two or more S poles (multipolar), an aggregate constituting one wire. The body may consist of two or more magnet pieces, preferably three or more pieces, but if - magnet pieces have only one N pole and one S pole (two poles), the aggregate that makes up one wire is Although it depends on the structure and length of the wire, it will be composed of three or more magnet pieces, preferably five or more pieces.

As a particularly preferred example, each magnet piece is formed into a square or circular shape magnetized so that the magnetic poles are located at both left and right ends, and adjacent magnet pieces are oriented so that their N and S poles are close to each other. Once positioned, strong lines of magnetic force will be generated between the magnets, making the pattern even clearer. Alternatively, each magnet piece may be composed of a bar magnet or a U-shaped magnet magnetized so that the magnetic poles are located at both ends, and adjacent magnet pieces are positioned so that their north and south poles are close to each other. It's okay. These magnets may be electromagnetic (7) magnets.

In a second aspect of the present invention, a plurality of separated magnet pieces are arranged close to each other so as not to touch each other to form a dotted pattern aggregate, and a paint containing magnetic powder is coated. Applying on an object to form a coating film, bringing the aggregate close to the coating film while the coating film is in a fluid state, and then curing the coating film to form a pattern corresponding to the dotted pattern. Provides a method for making it appear on a coating surface.

In this embodiment, an aggregate is prepared in which lines of magnetic force are formed between a plurality of separated magnet pieces, and after the paint containing magnetic powder is applied to the object to be coated, the paint film remains in a fluid state. As the aggregate approaches the front or back surface of the paint film, the magnetic powder in the fluid paint film begins to move along the lines of magnetic force, and as the paint film loses its fluidity, it begins to move. The movement speed will be slowed, and once fully cured, it will be fixed in place. Therefore, the magnetic powder is oriented along the direction of the lines of magnetic force, and a pattern corresponding to a dotted aggregate made of a large number of magnet pieces is formed (8).

The magnetic powder to be included in the paint includes stainless steel,
Any powder material, such as iron powder or Fe3O4 coated mica, can be used as long as it can be moved or changed in orientation by magnetization and can be included in a paint. Among the above-mentioned materials, Fe3O4 coated mica powder is known as a pigment for paints, and among the powder materials that are blended as pigments in ordinary paints, it is the one that does not receive the above magnetization effect. You can use whatever is easy.

As a paint, after being applied in a liquid or flowing state,
Various ordinary paints can be used as long as they can be cured by appropriate means such as baking or drying to form a coating film. In addition to the above-mentioned magnetic powder, the paint contains pigments, color vehicles, curing agents, solvents, and other usual components. The content of magnetic powder in the paint may be such that a clear pattern appears when subjected to magnetization, and specifically, the content of magnetic powder in the paint should be 0.1% or more of the paint. It is preferable to keep it.

In addition to baking-type paints that are hardened by baking after painting, air-drying paints can also be used. In addition, a one-coat finish paint that can be finished by applying just one layer of paint containing the magnetic powder, or a clear paint applied to the surface without curing the base paint after applying the base paint containing the magnetic powder. A so-called 2-coat/1-hake type paint, etc., in which the base paint and clear paint are then cured, can be freely used. As long as the coating film is formed in a state in which at least the magnetic powder-containing coating layer appears visually, it can be applied to a coating film forming method that includes any coating process.

For example, if a conventional colored undercoat or intermediate coat is applied to the base of a paint containing magnetic powder, the coloring of the underlying paint layer will be partially visible due to the movement and orientation of the magnetic powder. This allows the pattern shape to stand out well.

Further, it is also possible to protect the magnetic powder-containing paint layer by applying a substantially transparent top coat or the like to an extent that does not hide the magnetic powder-containing paint on top of the magnetic powder-containing paint.

The object to be coated is preferably made of synthetic resin, rubber, ceramic, non-magnetic metal such as aluminum, or other non-magnetic material. This is because when an assembly of magnet pieces is attached to the back side of the painted surface to impart a magnetizing effect to the paint containing magnetic powder, the object itself is likely to receive the magnetizing effect. If it is a so-called magnetic material, the entire painted surface will be magnetized uniformly,
This is because it becomes impossible to apply a magnetizing effect only to the pattern-shaped portion of the aggregate. However, the magnetizing effect of the aggregate on the painted surface varies depending on the strength of the magnetic force of the magnet pieces and the thickness of the object to be painted, so even if the material of the object to be painted is a somewhat magnetic material, if the thickness is thin, can be used.

In particular, when the aggregate is placed close to the surface side of a coated film that maintains fluidity, the influence of the magnetism of the object to be coated is small.

When attaching a magnet piece to the back side of the object to be painted and keeping it close to the paint layer containing magnetic powder, (11) The thinner the object to be painted, the better the magnetization effect by the magnet piece. It will be held in Therefore, in this method, it is desirable to set the strength of the magnetic force of the magnet piece in accordance with the thickness of the object to be coated.

If the collection of magnet pieces is held close enough to the surface of the paint layer containing magnetic powder on the surface side of the object to be painted, it will not be affected by the material or thickness of the object to be painted. . However, in this case, a means for holding the aggregate is required, and it is also necessary to avoid interfering with the curing process by baking the painted surface or heating and drying it.

When the paint is cured by baking or air drying while the collection of magnet pieces is kept close to the painted surface, the collection does not move until the magnetic powder of the paint loses its fluidity and becomes fixed. It is desirable to keep it as such. However, if the tape used to attach and hold the aggregate of magnet pieces to the object to be coated softens due to heat and becomes fixed, it takes time to remove it, and the magnet pieces themselves deteriorate due to heat. There is also a problem, so natural dissipation from the coating film or (12
) If the solvent is flashed off by heating and the magnet assembly is removed when the fluidity of the coating film is almost gone, the pattern has already been formed, so the above-mentioned problem can be solved. It is possible and practical.

After the magnetic powder of the paint is fixed in the desired pattern and a cured coating is formed, the pattern will not remain on the object even if the aggregate of magnet pieces is removed from the object. remain formed. This object to be painted can be used as a product as it is, or the painted surface can be further subjected to an appropriate finishing treatment.

The method for forming a patterned coating film according to the present invention is applicable not only to the case where a pattern shape different from the surrounding area is attached to only a part of the painted surface, such as various characters and figures, but also to the case where a pattern shape that is different from the surrounding area is applied to the entire painted surface. It can also be applied when forming a pattern shape.

Other features and advantages of the invention will become apparent from the following description with reference to the embodiment of FIGS. 1 to 10 of the accompanying drawings.

(Example) Fig. 1 shows the back side of the object to be coated 10, and a scattered pattern is formed on this side by arranging a plurality of separated magnet pieces 11 close together so as not to touch each other based on the present invention. The formed assembly 15 is attached with adhesive tape 30.

Each magnet piece 11 is made of a rectangular thin plate having north and south magnetic poles at both ends, and adjacent magnet pieces are positioned so that their north and south poles are close to each other to generate strong lines of magnetic force. There is.

FIG. 2 shows a cross-sectional view of the positional relationship between the object 10 and the magnet piece 11, and the magnet piece 11 is in close contact with the back surface of the object 10.

FIG. 3 shows the object to be coated 10 viewed from the front side, and as described above, a paint containing magnetic powder is placed on the object to be coated 10 to which the aggregate of magnet pieces 15 is closely fixed on the back surface. 20
When applied, the magnetic powder in the paint in a fluid state moves within the paint film along the direction of the magnetic field lines of the aggregate 15, and as a result, a portion 24 with a changed color appears on the paint film. This pattern is an L-shaped continuous pattern, and although it corresponds to the dot pattern formed by the aggregate 15 of the magnet pieces 11, it does not completely correspond to the dot pattern.

Next, when this paint film is baked and cured, the L-shaped pattern is fixed and its peripheral edges appear in a clear shape on the paint surface without blurring. . This pattern appears as a change in color tone on the surface of the coating film, but it does not create any unevenness on the surface, and there is no difference in level at the periphery of the pattern as in the conventional method. Thus, a predetermined pattern appears in the coating, which does not easily disappear and whose shadow does not change due to changes in light.

FIG. 4 shows another example of the coating method, in which the object to be coated 40
This is an example in which the present invention is applied to a material in which an intermediate coating layer 41 is formed by applying a suitable pretreatment to the surface of the substrate, then applying an intermediate coating and baking it. In the same manner as in the embodiment described above, after the magnet piece 11 is brought into close contact with the back surface, a layer 42 containing magnetic powder is applied on the intermediate coating layer 41 to reveal the pattern based on the present invention (]5 ) After that, a clear paint is applied to the surface to form a clear paint layer 43, and after setting, the magnet piece assembly is removed, and then the layers 42 and 43 are simultaneously baked and cured. In such a case, since there is an intermediate paint layer, it is desirable to arrange strong magnet pieces to prevent the lines of magnetic force from becoming weak.

FIG. 5 shows an assembly 55 formed by arranging magnet pieces 51 and 52 called left and right multi-pole magnets in which a large number of N poles and S poles are arranged alternately in close proximity, and forming a wide I-shape on the object to be coated. This is an example of forming a pattern. Adjacent magnet pieces 51 and 52 are alternately arranged in opposite directions so that their north and south poles are close to each other and face each other.

According to this arrangement, the lines of magnetic force M are aligned along the longitudinal direction of the aggregate 55, so that a wide I-shaped pattern appears.

Figure 6 shows a cylinder 2 with N and S poles located on the left and right sides of the cylinder.
Magnet pieces 61 and 62 called poles are placed close together to form an assembly 6.
3 to form a C-shaped pattern on the object 10 to be coated. Adjacent magnet pieces 61 and 62 are arranged so that their north and south poles are close to each other and face each other (1G). The aggregate 63 exhibits a dot-like scattered pattern in which cylinders are lined up, but the lines of magnetic force pass near the center of each cylinder, and a continuous C-shaped pattern appears on the object to be coated. Become so.

FIG. 7 shows a modification of FIG. 6, in which cylindrical bipolar magnet pieces 64 and 65 with N and S poles located on the left and right sides of the cylindrical body are arranged closely to form an assembly 66, and an arcuate shape is formed. This is an example of forming a pattern. Adjacent magnet pieces 64 and 65 have their N
The poles and the S poles are arranged on the left and right and alternately adjacent to each other. The aggregate 66 exhibits a dot-like scattered pattern in which cylinders are lined up, but the lines of magnetic force pass near the sides of each cylinder, and a continuous arcuate pattern appears on the object to be coated. Become so.

FIG. 8 shows a modification of FIG. 7, in which cylindrical two-pole magnet pieces 67 and 68, in which N and S poles are located on the left and right sides of the cylindrical body, are arranged in close proximity to form an assembly 69. magnet piece 67
and 68 are arranged so that their N poles and S poles are adjacent to each other. Since a repulsive force acts between adjacent magnetic poles, the lines of magnetic force M are weakened and dissipated, but weak lines of magnetic force are formed between the N and S poles in the crossing direction, and the magnetic powder in the coating film can exert magnetic force on

The aggregate 69 has a dot-like scattered pattern with cylinders lined up, but the lines of magnetic force pass near the center of each cylinder in a zigzag pattern, and a generally continuous arch-shaped pattern is formed on the object to be coated. It will begin to appear.

Figure 9 shows a cylinder 2 with N and S poles located on the left and right sides of the cylinder.
Pole magnet pieces 61 and 62, and N and S poles on the front, back, left and right sides of the cylindrical body.
This is an example in which an assembly 75 is formed by combining cylindrical multi-polar magnet pieces 71 and 72 with alternating poles, and an L-shaped pattern is formed on the object to be coated. Cylindrical multipolar magnet piece 71.72
are arranged so that the north and south poles of adjacent magnet pieces approach and oppose the south and north poles, respectively. In this case as well, a continuous L-shaped pattern rather than a dot-like pattern appears on the object to be coated.

FIG. 10 shows an example in which U-shaped magnet pieces 81, 82 and bar-shaped magnet pieces 83, 84 are combined to form an aggregate 85 to form a lattice pattern on the object 10 to be coated. Since the N pole or S pole appears independently at the end of each magnet, by arranging them alternately so that the polarity is opposite to that of the adjacent magnets in the front, back, left, and right, a magnetic force vAM that extends in a grid pattern can be obtained. , a grid-like pattern is drawn on the object 10 instead of a stepping-stone pattern.

Whether the polarity of each magnet piece is north or south can be easily determined by bringing the compass needle close to it, so there is no difficulty in positioning the magnet pieces. Each magnet piece can be fixed using adhesive tape or a mount, and can be easily removed after use, so the object to be coated will not be damaged.

(Effects of the Invention) As explained in detail above, according to the present invention, by using an aggregate of a large number of separated magnet pieces, a clear pattern can be formed on the coating film, and this pattern is uneven. It is a permanent pattern that will not peel off or disappear. This pattern is not limited to the shape of the magnet itself, and any pattern can be formed. As for the object to be coated (19), non-magnetic or diamagnetic materials are preferable, but even ferromagnetic materials have extremely remarkable technical effects, such as being able to form patterns on thin plates. There is something.

[Brief explanation of drawings]

FIG. 1 is a rear view of the object to be coated to which the method of the present invention is applied, as seen from the back side, FIG. 2 is a sectional view taken along line A-A in FIG. 1,
Figure 3 is a front view of the object to be coated viewed from the front, Figure 4 is a sectional view similar to Figure 2 showing another example of the coating method, and Figure 5 is an assembly using left and right multi-polar magnet pieces. Front view with some parts of the body omitted,
Fig. 6 is a perspective view of an assembly using two cylindrical magnet pieces, Fig. 7 is a front view showing a modified example of the assembly using two cylindrical magnet pieces, and Fig. 8 is a perspective view of an assembly using two cylindrical magnet pieces. A front view showing another modified example of an assembly using magnet pieces, FIG. 9 is a perspective view of an assembly using two cylindrical poles and a cylindrical multipole magnet piece, and FIG. 10 shows a U-shaped magnet piece and a bar. Perspective view of an assembly using shaped magnet pieces, No. 11
The figure is a front view showing a pattern formed on an object to be coated using the conventional technique, and FIG. 12 is a front view showing how magnets are combined. (20) 10.40...Object to be coated 20.4. ．． 2... Coating film containing magnetic powder 24... Pattern 11.51, 61.71.81... Magnet piece 15.55
．． 63.75.85...Aggregation 30...Adhesive tape M...Magnetic field lines

Claims (1)

[Claims] 1. A plurality of separate magnet pieces are arranged close to each other so as not to touch each other to form a dotted pattern aggregate, and this aggregate is positioned close to the back surface of the object to be coated. Next, a paint containing magnetic powder is applied to the object to be coated to form a paint film, and then the paint film is cured to cause a pattern corresponding to the dotted pattern to appear on the paint film surface. A method for forming a patterned coating film characterized by: 2. Prepare by arranging a plurality of separated magnet pieces close to each other so as not to touch each other to form a dotted pattern aggregate, and then apply a paint containing magnetic powder onto the object to be coated to form a coating film. forming, bringing the aggregate close to the coating film while the coating film is in a fluid state, and then curing the coating film to cause a pattern corresponding to the dotted pattern to appear on the coating film surface. A method for forming a patterned coating film characterized by: 3. Each of the magnet pieces is made of a square or circular shape magnetized so that the magnetic poles are located at both left and right ends, and adjacent magnet pieces are positioned in such a direction that their N and S poles are close to each other. The method according to claim 1 or 2. 4. Each of the magnet pieces consists of a bar magnet or a U-shaped magnet magnetized so that the magnetic poles are located at both ends, and adjacent magnet pieces are positioned in such a direction that their north and south poles are close to each other. 3. The method according to claim 1 or 2.