JPH0437781B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention mainly involves forming an arbitrary uneven pattern by embossing on a thin metal plate having a decorative coating or a decorative coating made of film, etc., and applying a three-dimensional effect enhancer to this uneven pattern to create a mechanical uneven pattern. A thin metal sheet with a decorative surface that easily adds visual three-dimensionality through color, has a deeper uneven pattern surface, and further strengthens the weather resistance of the decorative surface. This invention relates to a three-dimensional device that can form a three-dimensional image. In general, thin metal sheets, particularly organic coated steel sheets, fluorine resin coated steel sheets, and vinyl chloride steel sheets, are being used for a wide variety of purposes. This is because this type of steel sheet has excellent workability and design, as well as durability. Recently, the demand has shifted to steel sheets that have enhanced fashionability by adding three-dimensional effects, two-tone colors, etc. to the flat surface of the steel sheet. As a steel plate that can handle this, for example, a steel plate (flat plate) is passed between upper and lower metal rolls with an uneven pattern engraved on the outer circumferential surface, and an uneven pattern is formed by embossing to form an uneven pattern on the steel plate. Steel plates made of aluminum are commercially available. However, when these steel plates were subjected to a salt spray test (JIS-Z-2371), rust and peeling of the paint film were observed in the bent portions after 500 to 1000 hours. In addition, when observing the surface of this type of steel plate under 30x magnification, it can be seen that the paint film on the bent parts of the concave and convex parts is partially peeled off and wrinkled, has scratches, is cracked, or is thin. or cracks were occurring. This is because the embossing line is not suitable. Furthermore, simply adding two-tone color or the like to the decorative surface has the disadvantage that it lacks the ability to visually enhance the fashionability and three-dimensional effect. In order to eliminate these defects, the present invention softens the decorative film during embossing to exhibit ductility, thereby eliminating peeling, wrinkles, scratches, and cracks in the decorative film, and easily correcting residual distortion during embossing. By applying the three-dimensional effect enhancer from only one direction to at least the sloped surface (side surface) of the convex pattern of the uneven pattern, the mechanical three-dimensional effect can be strengthened and the visual effect can be easily and easily created. In other words, by making the colors function more like shadows to create an unprecedented three-dimensional effect, we also create a three-dimensional effect by using durability, weather resistance, and gloss on the decorative surface. This paper proposes a three-dimensional device for decorative surfaces that can enhance the appearance of cosmetic surfaces. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a three-dimensional decoration device (hereinafter simply referred to as a three-dimensional device) for a decorative surface according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an example of the above-mentioned device, and 1 is a thin metal plate feeding section (hereinafter referred to as
It consists of an uncoiler 2 and a pinch roller 3 (simply referred to as a feeding section), and a flat metal thin plate (having a decorative coating such as a decorative coating or a decorative film) A wound into a coil is attached to the loop. Part 4 always,
This is for easy delivery. Loop part 4
is the metal thin plate A in the next process after the heater part 5
(hereinafter simply referred to as a coil) It controls the speed difference and deviation that occur during transfer by loosening the coil A, and also functions to prevent large shocks from being applied to the coil A fed from the feeding section 1 . It is something to do. The heater section 5 is composed of a pinch roller 6 which also serves as a guide and a heater 7, and the pinch roller 6 has upper and lower rollers 6a and 6b and a coil A
The coil A is clamped only at the start of the line, and thereafter serves as a mere guide roller to feed the coil A to the heater 7. In addition, the heater 7 heats the decorative film of the coil A, essentially the coil A itself, to 30 to 60°C to soften the decorative film, and prevents the decorative film from peeling off from the metal itself or the base treatment film during embossing. This prevents breakage, scratches, and cracks from occurring. The heating method is one of a hot air method, an open flame method, and a hot wire method. A pinch roller 8 feeds the coil A to the embossing roll 9 at a predetermined speed, and also functions as a brake against the movement of the coil A during embossing. Moreover, it suppresses fraying when the coil A is embossed. The embossing roll 9 has a pattern consisting of male and female uneven parts formed on its outer circumferential surface, and the lower rolls 9a and 9b are engaged to form an arbitrary uneven pattern on the coil A, such as the pattern shown in FIGS. 2a and 2b. Convex patterns B and C are applied, and the gap between the upper and lower rolls 9a and b is determined by the height of the concave and convex patterns B and C and the thickness of the coil A. Reference numeral 10 is a leveler for correcting residual strain existing in the embossed coil A', and upper rollers 10a ₁ , 10a ₂ , 10
a ₃ , ... 10a _o (shown up to 10a ₃ in Figure 3), lower rollers 10b ₁ , 10b ₂ , 10b ₃ , ... _10bo (shown up to 10b ₄ in Figure 3) in this order in a zigzag pattern. , and the upper roller group 10a and the lower roller group 10
The gap G between b and b can be adjusted. Reference numeral 11 denotes a tensioning pinch roller which rotates faster than the embossing roll 9 and allows the coil A' to pass through the steps of the embossing roll 9 and leveler 10 while being stretched (under tension). . Reference numeral 12 denotes a three-dimensional effect promoter coating machine (hereinafter simply referred to as a coating machine) which applies a three-dimensional effect enhancer D (hereinafter simply referred to as a promoter) made of paint, film, etc. to a second
The coating is applied in one direction over the entire surface of the concave and convex patterns B and C as shown in Figures a and b. That is, the promoter D is applied only to the surfaces that collide with the promoter D, such as the top surface E of the concave pattern B and the convex pattern C and the side surface F of the convex pattern C, as shown in FIGS. 4a to 4c. Its distribution state is film-like, dot-like, linear, etc. Incidentally, the angle θ ₁ of the applicator 12 is such that the traveling direction of the coil A and the promoter D collide at an angle of 0 to 90 degrees, or the promoter 12 is set so that the traveling direction of the coil A' is followed by the promoter D. D is applied to make the coil A' look more three-dimensional due to its shading function, and depending on the direction of the coil A', concave and convex patterns B and C are applied.
It makes it look like the opposite. Further, specific examples of the coating machine 12 include a spray gun, a roll coater, and a curtain flow coater (can be used only for cutting plates). Furthermore, the angle θ ₁ is
When the angle is 90° or 0° (when the applicator 12 is supported at a height parallel to the coil A), the coil A' is passed through at high speed, and the promoter is applied to the back or front of the convex pattern C. The purpose is to prevent D from adhering. 13 is the top surface E of the convex pattern C surface with a wiping machine
The promoter D is wiped off to expose the cosmetic coating. The wiping machine 13 gradually wipes off the promoter D in one stage as shown in FIG. 5, or in multiple stages (not shown) arranged in parallel.
The wiping machine 13 also includes a wiping roller 13a, a back up roller 13b, and a doctor blade 1.
3c and a solvent H, such as petroleum, water, thinner, etc., to the wiping roller 13a.
3d. 14 is an overcoat coating machine (hereinafter simply referred to as a coating machine) to apply transparent paint i to the entire decorative surface from which promoter D has been wiped off, and to cover the entire decorative surface with a coating film to strengthen weather resistance. At the same time, it prevents deterioration of the shaded color tone, and
This is to protect the decorative film from possible cracks caused by embossing. To explain further, the coating machine 14 includes a roll coater, a flow coater, and a spray gun as shown in FIGS. 1 and 6.
is absent, transparent paint i is applied to the absent area.
A spray gun 14' or a so-called reverse-rotating roll coater, which is opposite to the advance of the coil A', is used in conjunction with the spray gun 14' to apply the coating. In addition, 14a
1 is a coating roller, 14b is a back-up roller, and 14c is a feed roller. 15 is a drying oven where the cosmetic surface promoter D and the transparent paint i of the coil A' are applied.
It is dried or baked. Next, the operation of the three-dimensional device according to the present invention will be described. First, the flat coil A mounted on the feeding section 1 is fed to the loop section 4 via the pinch roller 3. At this time, even when the coil A is pulled by the pinch roller 3, since a brake device (not shown) is attached to the uncoiler 2, the coil A is pulled to the loop part 4 under a certain allowable tension. This is what will be sent. And loop part 4
From there, the coil A is fed to the heater section 5 via the pinch roller 6 which also serves as a guide, and then fed to the heater 7, where it is heated to 30 to 60 DEG C. to soften the decorative coating, and then fed to the pinch roller 8. Note that the pinch roller 6 that also serves as a guide functions as a pinch roller until the coil A is stabilized on the pinch roller 8, and thereafter functions as a mere guide roller. Next, pinch roller 8
The coil A sent out from the embossing roll 9 is fed to the embossing roll 9, which continuously forms an embossed pattern consisting of a concave pattern B and a convex pattern C as shown in FIG. 2 a and b, for example, on the coil A. It is. On this occasion,
Embossing is performed with tension applied to coil A. The coil A' sent out from the embossing roll 9 is then sent to the leveler 10.
The residual strain generated during embossing is corrected in the tensioned state between the embossing roll 9 and the tensioning pinch roller 11, and the film is fed to the coating machine 12. Note that the force relationship between the pinch roller 8 and the tensioning pinch roller 11 with respect to the coil A' is based on the rotation of the embossing roll 9, and the rotation of the pinch roller 8 is slow, and the tensioning pinch roller 1 is slow.
Set the speed relationship where the rotation of No. 1 is fast, and then rotate the coil.
When A′ is in tension, the entire coil is assembled without destroying the embossing and concave and convex patterns B and C.
This is to flatten A' and remove residual strain. As a result, the coil A' becomes mountain-like in the above-mentioned area, twists and moves, does not flap at the entrance of the embossing roll 9, and shifts during embossing, making the pattern unclear. No more biting into it. Further, since the leveler 10 is in a state where tension is applied in one direction, the coil A' can be easily flattened as described above, and residual strain can be easily released. Of course, the tension within the above range is within the range of force that does not change the embossed pattern. Further, the coil A' sent out from the tensioning pinch roller 11 is coated with a promoter D having at least one of the density, hue, and saturation of the decorative film by a coating machine 12, for example, in concave and convex patterns B and C.
The spray gun is used to face the entire surface as shown in FIGS. 4A to 4C at an angle of θ=45°, for example, to the traveling direction of the coil A' (indicated by arrow α in FIGS. 4A to C). It is applied and adhered to each of the concave and convex patterns B and C as shown in c. On this occasion,
The distribution of the promoter D in each part of the concave pattern B and the convex pattern C is uniform, non-uniform, a mixed distribution, or a distribution in which the density gradually changes.
The coil A' having such an uneven decorative surface is then fed to a wiping machine 13, which wipes off the promoter D applied to the top surface of the convex pattern C, and removes the decorative coating of coil A' on the top surface of the convex pattern C. Expose the membrane. Thereafter, a transparent paint, such as an acrylic resin, is applied to the entire decorative surface by a coating machine 14, and this is sent to a drying oven 15, where the promoter D and the transparent paint i are dried or baked. Example Coil A was a colored galvanized iron plate (JIS-G-3312) with a thickness of 0.27 mm, coated with white paint using alkyd resin as a vehicle.
The temperature of the heater 7 was varied from 10 to 80°C, the embossing depth was 0.9 mm, the ratio of concave pattern B to convex pattern C was 1:1, and the embossing speed was 38°C.
m/min. Further, the speed difference between the pinch roller 8 and the tensioning pinch roller 11 was about 3%.
Further, as the promoter D, a paint made of a black alkyd resin was applied with a spray gun. Acrylic resin was used as the transparent paint i, and 20 microns of this was applied to the entire decorative surface and baked. Then, when the temperature of the surface of the coil A sent out from the embossing roll 9, the so-called temperature of the decorative film (paint film in this case), is changed from 0 to 80°C, peeling of the decorative film, cracking, The states of cracks, shrinkage, and scratches are shown in a line graph in Figure 8. Also,
The flatness and degree of residual strain (flatness) of the coil A' sent out from the leveler 10 were visually observed. In addition, the inspection method is (1) coil
The apparent number of Pekotoskis that exist per meter of A', (2) the distribution state of Pekotsuki, (3) the height difference of Pekotsuki (bottom and top surfaces of the designed irregularities and the actual bottom surface, top surface (4) Observations regarding the overall appearance are shown. Furthermore, (5) the three-dimensional effect of the concave and convex patterns B and C is visually observed when the coil A' is propped up in the advancing direction and in the opposite direction. Comparative example For coil A as described above, a steel plate (flat plate) is passed between the upper and lower metal rolls with the conventional uneven pattern engraved on the outer peripheral surface, embossing is performed in the process of forming the uneven pattern on the steel plate, and then the process is stopped. Coil A
A paint of a color different from that of coil A' was evenly applied with a spray gun from just above the concave and convex patterns B and C, and after drying, a test piece was prepared. The appearance of the concave and convex patterns B and C is shown in FIG.

[Table] Furthermore, the results of a salt spray test (1500 hours) of the example (coil A when the decorative coating was heated to 50°C) and the coil formed according to the comparative example were as shown in the table below. .

[Table] What has been described above is only one embodiment of the three-dimensionalization device according to the present invention, and the temperature range from the heater 7 to the tensioning pinch roller 11 is kept within a temperature range of approximately 30 to 60°C.
Depending on the distribution ratio of the concave and convex patterns B and C, the number of stages of the leveler rollers can be increased, the distribution of the concave and convex patterns B and C can be arranged so that they spread out from the center, or only across the width. Concave and convex patterns B and C can be distributed. Furthermore, if the coil A is a cut plate, the steps after the heater part 5 can be omitted and the same manufacturing process can be performed in the later steps, and a curtain flow coater can also be used. Further, the pinch roller 8 may be removed depending on the material and thickness of the coil A, or a guide rail-like member may be simply provided in place of the pinch roller 8. Furthermore, the coil A is not limited to surface-treated steel plates, galvanized steel plates, galvalume steel plates, stainless steel plates, copper plates, and aluminum plates, but also pre-coated plates and base-treated materials can be used. In addition, the applicator 12 may be formed as shown in FIG. 9, or the top surface E of the convex pattern C may be an inclined surface as shown in FIG. 10 in the embossed cross section. Furthermore, a magnifying glass or a video camera can be placed at the position shown by the dashed line in FIG. 1 to monitor the decorative coating film by embossing. Further, as shown in FIG. 11a, the coating device 12 may be used to apply the coating from one direction or two directions on the side surface of the coil A' in the direction of movement, for example, at an angle of θ ₂ =0 to 90°. As shown in Figures 1 and 2b, the promoter D can be applied at any angle from both sides in the direction of movement during double-width molding to give directionality to the distribution of the promoter D. In addition, for double width, a masking part is provided in the center of coil A',
It is necessary to prevent the promoters D from colliding with each other in the central portion of the coil A'. As described above, according to the three-dimensional device of the present invention, there is no change in the force applied to the coil in the embossing zone, and embossing can be performed under constant tension at all times, so the embossed pattern does not shift during processing and is beautiful. Can form uneven patterns. Because the decorative film is heated to make it soft enough for embossing, the decorative film may peel off from the steel plate during embossing, or the decorative film may wrinkle, crack, scratch, or crack. Without,
It can form beautiful cosmetic coatings with excellent weather resistance, scratch resistance, and chemical resistance. The residual strain caused by the distortion formed by embossing can be easily and sufficiently removed by correction under tension, and a concavo-convex pattern with no flattening and full of three-dimensional effect can be formed. The lines are arranged in a straight line, and the process uses a flow that does not apply unreasonable force to the coil, allowing for smooth embossing. Since the coil is heated and embossed, the entire coil does not need to be heated to a certain temperature in the factory. The straight line allows for embossing at high temperatures. The top surface of the convex pattern in the concave-convex pattern is made into a highly reflective surface, and at least the side surfaces of the convex pattern are coated with a promoting agent that functions like a shadow, creating a three-dimensional effect due to the mechanical concave-convex pattern, and a visual enhancement due to the enhancing agent. This allows for unprecedented three-dimensionality and depth. The promoter can be easily applied after the uneven pattern surface is formed. By using a device that applies transparent paint to all decorative surfaces, and after embossing and applying a promoter, it not only enhances weather resistance, but also creates a soft feel by enhancing the three-dimensional effect and partially suppressing the three-dimensional effect. At the same time, the beauty of the appearance due to the refraction of the transparent paint can be exhibited. It has the following characteristics.

[Brief explanation of drawings]

Fig. 1 is an explanatory view showing an embodiment of the decorative surface three-dimensionalization device according to the present invention, Fig. 2 is an explanatory view showing a part of the embossed patterns a and b, and Fig. 3 is a perspective view showing an example of a leveler. , Fig. 4 a to c are end views showing enlarged cross sections of the embossed pattern and the decorative surface, Fig. 5 is a perspective view showing an example of a wiping machine, and Fig. 6 shows an example of an overcoat applicator. An explanatory diagram, FIG. 7 is a decorative board that has been used for a long time, FIG. 8 is an explanatory diagram showing the characteristics of the decorative surface, and FIGS. 9 to 11 a and b are explanatory diagrams showing other examples. . 1 ...Thin metal plate feeding section, 5 Heater section, 9... Emboss roll, 10 Leveler, 11... Pinch roller for tension, 12... Three-dimensional effect promoter applicator, 14
...Overcoat applicator, A, A'...Thin metal plate.

Claims (1)

[Claims] 1 In an apparatus for applying an uneven pattern and a coating film to a thin metal sheet, there is a thin metal sheet feeding section consisting of an uncoiler and a pinch roller for feeding the thin metal sheet, and a thin metal sheet fed from the feeding section in a slack state. A loop section that accommodates and adjusts between the front and rear processes, and a thin metal plate of 30
A heater section that heats the temperature to ~60℃, a pinch roller that also serves as a guide placed after the heater section, an embossing roll that applies a desired uneven pattern to the thin metal sheet sent out from the roller, and an embossing roll placed after the roll. A three-dimensional effect is promoted by applying a three-dimensional effect enhancer from only one direction from an acute angle direction to the uneven pattern surface of a thin metal plate processed by a leveler, a pulling pinch roller disposed at the exit of the leveler, and an embossing roll. a wiping machine that wipes off the three-dimensional effect promoter present on the top surface of the convex pattern, an overcoat applicator that applies a transparent paint to the entire surface of the wiped decorative surface, and a three-dimensional effect promoter that applies the overcoat film and three-dimensional effect. A device for creating three-dimensional decorative surfaces, characterized in that a promoter and a drying oven for drying the promoter are arranged in series.