JP4338436B2 - Method for producing metal material having wood grain pattern - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a metal material having a wood grain pattern on its surface.
[0002]
[Prior art]
Conventionally, as a metal material having a grain pattern formed on the surface, there are a metal material having a grain pattern adhered to the surface (see Patent Document 1), and a metal material having a surface painted with a paint.
However, those with a wood grain film stuck or painted have a flat metal material surface and lack the texture of wood. Moreover, when the film stuck on the surface is damaged, it is difficult to repair it partially, and the film in a predetermined area must be peeled off and a film having a shape adapted to the area must be reapplied. It was a thing. On the other hand, in the case of painting, it is possible to paint only the part where the paint has been peeled off, so it is suitable for partial repair, but draw the grain pattern without uneven color between the repaired part and the surrounding area It was difficult.
[0003]
Patent Document 2 discloses a method of manufacturing a metal plate having a wood grain pattern, in which a plurality of metal plates are fused and then the surface is dug so that the dug is flattened. It is to be rolled. However, the metal plate manufacturing method disclosed in Patent Document 2 requires a large-scale manufacturing apparatus, and it is difficult to provide a metal material with a wood grain pattern at a low cost.
[0004]
Furthermore, Patent Document 3 discloses a method for producing a wood grain pattern embossed plate in which an emboss pattern having a convex shape of a wood grain conduit is formed on a copper plating layer by corrosion, the surface thereof is sandblasted, and further subjected to chrome plating. However, the surface of the metal had to be plated with copper, which made the metal material expensive and increased the cost.
[0005]
[Patent Document 1]
JP-A-9-177238 [Patent Document 2]
JP-A-10-249550 [Patent Document 3]
JP-A-7-118890 [0006]
[Problems to be solved by the invention]
An object of the present invention is to easily and inexpensively apply a grain pattern on the surface of any metal material, and the surface has a grain pattern that can maintain a good appearance for a long period of time with a texture of wood. The object is to provide a method for producing a metal material.
[0007]
[Means for Solving the Problems]
As a result of intensive studies in view of such circumstances, the present inventor formed a wood-grained groove pattern on the surface of a metal material using a cutting tool and painted the surface, thereby achieving the intended purpose. Is achieved.
[0008]
The surface of the metal material is made by using a cutting tool to form a wood-like streak pattern, and the surface is sanded and painted. The sanding process removes surface chips and finer streaks. A groove pattern is provided, and the texture of the wood can be further enhanced.
[0009]
Use a cutting tool on the surface of the metal material to form a wood-grained streak pattern, sand the surface, coat it with the first painting process, coat it with the second painting process, and coat it with the second painting process. After wiping away the undried paint, a non-uniform pattern due to the top coat appears on the surface of the metal material, and the majority of the top coat in the undried condition is swept away. The top coat remains in the dents on the metal surface to be formed, and the streak pattern appears clearly.
[0010]
Use a cutting tool on the surface of the metal material to form a wood-grained streak pattern, sand the surface, coat it with the first painting process, coat it with the second painting process, and coat it with the second painting process. After wiping away the undried paint and applying the top coat with urethane beads, the unevenness due to the urethane beads is given to the surface of the metal material, giving the same rough feeling as the wood surface. This rough feeling is due to the urethane beads, so people will not touch and be injured.
[0011]
The cutting tool is a rotary rotor with a cutting blade on the periphery, and the cutting blade is brought into contact with the surface of the metal material to form a wood-grained groove pattern, so both ends of the groove pattern are gently formed. The texture of the wood can be further enhanced.
[0012]
The cutting tool is a rotating rotor with cutting edges on the periphery, and the cutting blades are brought into contact with the surface of the metal material, and the rotating rotor and the metal material are moved relative to each other, thereby continuously forming a textured groove pattern. It is suitable for mass production.
[0013]
The cutting tool is a rotary rotor having cutting edges on the periphery, the cutting blade is brought into contact with the surface of the metal material, the rotary rotor and the metal material are moved relative to each other, and the relative movement direction is the rotation direction of the rotary rotor. By combining the direction orthogonal to the rotation direction of the rotor, the wood grain pattern does not become a simple repeating pattern, and a more natural grain texture can be created.
[0014]
The cutting tool has a plurality of rotating rotors arranged side by side, and the cutting blades provided on the peripheral edges of adjacent rotating rotors are shifted so that the cutting blades of all the rotating rotors come into contact with the metal material simultaneously during cutting. In addition, the load of power for rotating the rotary rotor can be reduced, and the adjacent streak pattern is not formed in parallel at the same position, so that a more natural grain texture can be created.
[0015]
[Action]
According to the present invention, since the surface of the metal material is formed with a wood grain streak pattern using a cutting tool and the surface is painted, a three-dimensional wood grain pattern is formed, and the coating material is a streak groove. Since the pattern is filled in the recesses, the paint is difficult to peel off, and even if the paint is peeled off, the surface of the metal material has a three-dimensional wood grain pattern, so it can be easily repaired by partially repairing the grain pattern Can be restored.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, examples of the present invention will be described with reference to the drawings.
1 to 8 show an embodiment of the method of the present invention, and FIG. 1 is an explanatory diagram showing the flow of the entire process. Cutting process A → Thunder process B → Pre-paint process C → Dry → Primer treatment step D → drying (baking) → first coating step E (undercoating) → drying (baking) → second coating step F (topcoating) → topcoat treatment step G → drying (baking).
Although the present Example demonstrates the case where a grain pattern is given to the aluminum metal material 1, metal materials are not limited to aluminum, Various things, such as iron and copper, can be used. The aluminum metal material 1 that is not subjected to an alumite treatment can reduce the material cost and has a soft surface and is suitable for processing.
[0017]
The cutting processing step A is a step of forming a grain-like streak pattern 11 on the surface of the aluminum metal material 1, and the streak pattern 11 is formed on the surface of the metal material 1 by the cutting tool 2.
The cutting tool 2 has a plurality of rotating rotors 3 arranged in parallel, and a cutting blade 4 having a height of 3 mm formed by an artificial diamond is provided at four peripheral edges of the rotating rotor 3. More specifically, four cutting blades 4 made of an artificial diamond are provided on the periphery of a steel disc 31 having a diameter of 94 mm and a plate thickness of 1.5 mm at intervals of a central angle of 90 °. The tip of the cutting blade 4 is a sharp cutting edge as shown in FIG.
[0018]
Adjacent rotary rotors 3 are arranged with a phase difference of 30 °. Accordingly, the cutting blades 4 are formed at the same position for every three sheets, and when the cutting tool 2 is viewed from the side, the cutting blades 4 are formed at every central angle of 30 ° as shown in FIG. 2 and 5, the rotating rotor 3 rotates clockwise, and the metal material 1 is fed in the direction opposite to the rotating direction of the rotating rotor 3, that is, the lower position of the rotating rotor 3 in FIGS. 2 and 5 from the left. It is.
Adjacent rotary rotors 3 are arranged with an interval of 1 mm. When the width that can be processed at once by the cutting tool 2 is 100 mm, about 40 rotary rotors 3 are required. The center of each rotary rotor 3 is fixed to an output shaft 21, and the output shaft 21 is connected to power (not shown) such as an electric motor.
[0019]
In forming the streak pattern 11, as an example of the rotational speed of the rotary rotor 3 and the moving speed of the cutting tool 2 and the metal material 1 relative to each other, the rotational speed of the rotary rotor 3 is 3000 rpm, and the position of the cutting tool 2 is a fixed position. And the feed speed of the metal material 1 is 12 m / min. Further, the cutting tool 2 also reciprocates in the axial direction of the output shaft 21 (direction (A) in FIG. 6), and the amplitude is 1 mm, and reciprocates about 300 per minute. In this way, the streak pattern 11 as shown as a schematic diagram in FIG. 7 can be formed on the surface of the metal material 1.
[0020]
Next to the cutting treatment process A is a sander treatment process B. In the sander treatment process B, sandpaper, a polishing nonwoven fabric, a grindstone or the like is used. In the present embodiment, the sandpaper 5 is used, and the sandpaper 5 is formed in an endless belt shape. The sandpaper 5 is stretched by a plurality of rotating rollers 6, and the rotating rollers 6 are driven to rotate, thereby endlessly. The belt-shaped sandpaper 5 rotates. Then, by pressing the surface of the sandpaper 5 against the surface of the metal material 1 with a force of 2 to 3 kgf by the pressing tool 7 from the back side of the rotating sandpaper 5, sanding is performed, and the previous cutting is performed. Chips generated during the processing step A are removed, and finer groove patterns 11 are formed on the surface of the metal material 1 (see FIG. 8).
As the coarseness of the sandpaper 5, a relatively coarse one having a number of about 60 is used. When the sandpaper 5 becomes finer, the groove pattern 11 by the sandpaper 5 is not formed on the surface of the metal material 1 and the texture of the wood is lowered. The pattern 11 is easy to form and is suitable.
[0021]
Next to the sander processing step B is a pre-painting processing step C, in which the metal material 1 is immersed in the chromic acid solution, the surface of the metal material 1 is removed and degreased, and the metal material 1 is subjected to rust prevention treatment. This improves the adhesion of the paint in the subsequent coating process. The metal material 1 immersed in the chromic acid solution is taken out and dried at room temperature.
[0022]
Next to the pre-coating treatment step C is a primer treatment step D, in which a primer layer is formed on the surface of the metal material 1. The primer paint is spray-painted by the automatic gun device 8, but can be applied by a generally known method. As the primer paint, an epoxy paint is used in order to improve the adhesion and rust prevention between the coating material coated on the primer layer and the metal material. The primer paint is baked at 100 to 150 ° C. for about 5 minutes.
[0023]
Next to the primer treatment step D is a first coating step E, where the surface of the metal material 1 is subjected to undercoating. The undercoat material is an acrylic paint, and an inorganic pigment is blended in order to improve weather resistance. The undercoat material is spray-painted by the automatic gun device 8. The undercoat material is baked at a temperature of 150 to 200 ° C. for about 20 minutes.
[0024]
Following the first coating step E is a second coating step F, in which a top coat is applied to the surface of the metal material 1 that has been undercoated. The top coating material is an acrylic coating material similar to the under coating material, and an inorganic pigment is blended in order to improve weather resistance. In addition, the thing with a deep color whose brightness is lower than undercoat is used for the top coat. The top coat material is applied by immersing the lower part of the transfer roll 9 whose surface is chromium-plated in the upper coat material stored on the tray, and bringing the metal material 1 into contact with the upper part of the urethane roll 10 that rotates on the upper part of the transfer roll 9. Apply. A buffalo 12 is provided at a position immediately after the top coat material is applied, and the uncured top coat material is wiped off. Most of the topcoat material is swept away by the buffalo 9 except for the material remaining in the recesses of the streak pattern 11. Therefore, the overcoat remaining in the streak pattern 11 reveals a darker streak pattern than the undercoat, and the grain pattern appears more clearly. Note that various types of the bar flora 12 can be used as long as they can wipe off the uncured paint, and examples thereof include a roller provided with a brush, sponge rubber, or the like.
[0025]
The second coating step F is followed by a top coat processing step G, in which a top coat layer is formed on the surface of the metal material 1 that has been overcoated. The top coat paint is a polyester-based clear paint, and contains a trace amount of an ultraviolet absorber for the purpose of improving the weather resistance of the undercoat material and the top coat material.
Furthermore, urethane beads having an average particle size of 50 μm are blended in the top coat paint. The blending amount of the urethane beads is 5 parts by weight with respect to 95 parts by weight of the top coat paint. The urethane beads give fine irregularities to the surface of the metal material 1 and give a rough feeling peculiar to the surface of the bark. The top coat paint is baked at a temperature of 150 to 200 ° C. for about 20 minutes.
[0026]
In the above embodiment, the feed speed of the metal material 1 in the cutting process A is 12 m / min, and the rotational speed of the rotary rotor 3 of the cutting tool 2 is 3000 rpm. The hardness of the metal material, wood grain pattern (stitch pattern) The size can be changed as appropriate. When the feed speed of the metal material 1 is increased, the groove pattern 11 having the same size is formed by increasing the rotational speed of the rotary rotor 3. Further, the movement of the cutting tool 2 in the axial direction of the output shaft 21 can be changed to an appropriate amplitude and speed, and the texture of the finished wood can be changed.
[0027]
The size of the rotating rotor 3, the number of cutting blades 4 provided on the rotating rotor 3, the number of rotating rotors 3, and the interval between adjacent rotating rotors 3 can be changed as appropriate.
In the said Example, although the cutting tool 2 is arrange | positioned only in one place, you may arrange | position two or more cutting tools 2 by shifting a position. In the case where the cutting tool 2 is arranged at a plurality of locations, the texture of the wood can be changed by using the cutting blade 4 having a different cutting edge shape.
Furthermore, the reciprocating motion of the cutting tool 2 along the axial direction of the output shaft 21 has an amplitude of 1 mm and 300 reciprocations per minute, but the amplitude is appropriately adjusted within a range of 1 to 5 mm and 100 to 500 reciprocations per minute, Can change the grain pattern.
[0028]
The pressing force and rotation speed of the sandpaper 5 in the sander processing step B can be changed as appropriate, and may be adjusted while confirming the finished state of the grain pattern. Further, in the cutting process A, when a dent is generated on the surface of the metal material 1 and a portion where the sandpaper 5 does not contact remains, the sanding process may be performed manually.
[0029]
Various coating materials can be used in the primer treatment step D, the first coating step E, the second coating step F, and the top coat treatment step G as long as they can satisfy the peeling strength of the coating film, the weather resistance of the coating film, and the like. Can be used.
[0030]
【The invention's effect】
According to the method for producing a metal material having a wood grain pattern of the present invention, a textured groove pattern is formed on the surface of the metal material by using a cutting tool, and the surface is painted. A three-dimensional wood grain pattern is formed, the surface coating material is filled in the recesses of the streak pattern, and it is not easily peeled off, and it can maintain a good appearance over a long period of time. is there.
[Brief description of the drawings]
FIG. 1 is an overall process diagram of a method for producing a metal material having a wood grain pattern of the present invention. FIG. 2 is an explanatory diagram of a rotary rotor used in the method of the present invention. FIG. 3 is an enlarged view of a cutting blade used in the method of the present invention. Sectional view (AA line enlarged sectional view in FIG. 2)
FIG. 4 is an explanatory diagram of a cutting tool used in the method of the present invention. FIG. 5 is a sectional view taken along line BB in FIG. 4. FIG. 6 represents the relationship between the cutting tool and a metal material in the cutting process of the method of the present invention. FIG. 7 is a schematic view of the surface of a metal material processed by the method of the present invention (after the cutting process), (A) is a surface view, and (B) is a cross-sectional view. FIG. 8 is processed by the method of the present invention. FIG. 3 is a schematic view of the surface of the metal material (after the sanding process), (A) is a surface view, and (B) is a cross-sectional view.
DESCRIPTION OF SYMBOLS 1 Metal material 2 Cutting tool 3 Rotating rotor 4 Cutting blade 5 Sandpaper A Cutting process B Sander process C Pre-paint process D Primer process E First paint process F Second paint process G Top coat process

Claims (1)

A plurality of rotating rotors having cutting edges on the periphery are arranged side by side, and the positions of the cutting blades of adjacent rotating rotors are shifted to bring the cutting blades into contact with the surface of the metal material, and the rotating rotor and the metal material rotate. Relative movement that combines the rotation direction of the rotor and the direction orthogonal to the rotation direction of the rotation rotor, forming a grain-like groove pattern on the surface of the metal material, sanding the surface, the first painting process Undercoat the undercoat with the second coating process, overcoat with a dark-colored topcoat that is lighter than the undercoat in the second coating process, wipe out the undried paint after the second coating process, and mix with urethane beads A method for producing a metal material having a wood grain pattern, wherein the top coat treatment is performed .

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