JPH0510240B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention involves forming an arbitrary uneven pattern by embossing on a thin metal plate having a decorative coating or a decorative film made of film, and applying a three-dimensional effect enhancer to this uneven pattern to create a mechanical uneven pattern. The present invention relates to a three-dimensional effect enhancing device that can easily add a visual three-dimensional effect by color and continuously produce a decorative thin metal plate having a deeper uneven pattern surface. 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, demand has shifted from the above-mentioned flat steel plates to steel plates with enhanced fashionability by adding a three-dimensional effect or two-tone color to the surface. As a steel plate corresponding to this, for example, a steel plate on which an irregular pattern is formed by embossing is commercially available. However, when a salt spray test (JIS-Z-2371) was conducted on these steel plates,
Rust and peeling of the paint film were observed on the bent parts after 500 to 1000 hours. In addition, when observing the surface of this type of steel sheet under 30x magnification, it can be seen that some of the coating film has peeled off and become wrinkled, scratched, cracked, or thinned at the bent parts of concave and convex parts. 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. This paper proposes a device for enhancing the three-dimensional effect of a makeup surface, which adds a three-dimensional effect and makes colors function more like shadows to create an unprecedented three-dimensional effect. DESCRIPTION OF THE PREFERRED EMBODIMENTS A device for enhancing the three-dimensional effect of a decorative surface (hereinafter simply referred to as an enhancement device) according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an example of the above-mentioned device. 1 is a thin metal plate feeding section (hereinafter simply referred to as the feeding section), which is composed of an uncoiler 2 and a pinch roller 3, and a flat plate wound into a coil shape. This is for attaching a shaped metal thin plate A (having a decorative film such as a decorative paint film or a decorative film) and constantly feeding it to the loop portion 4 without strain. The loop section 4 controls the speed difference and deviation that occur when transferring the thin metal plate A (hereinafter simply referred to as a coil) after the heater section 5 in the next process by loosening the coil A, and also This functions to prevent a large impact from being applied to the coil A being fed. The heater section 5 is composed of a pinch roller 6 that also serves as a guide and a heater 7. The pinch roller 6 pinches the coil A with upper and lower rollers 6a and 6b only at the start of the line, and thereafter acts as a mere guide roller to hold the coil A. It is supplied to the heater 7. In addition, the heater 7 heats the decorative coating of the coil A, which is essentially the coil A itself, at a temperature of about 30 to 60°C.
This prevents the decorative film from peeling off or cracking from the steel plate during embossing.
This prevents scratches and cracks from occurring. The heating method is one of a hot air method, an open flame method, and a hot wire method. 8
The coil A is fed to the embossing roll 9 at a predetermined speed using a bridle roll, the winding curl of the coil A is reduced, and the coil A is fed to the next process. The embossing roll 9 has upper and lower rolls 9a and 9b formed with a pattern consisting of male and female uneven parts on the outer peripheral surface.
The coil A is meshed to give the coil A an arbitrary uneven pattern, for example, the uneven pattern shown in FIG. It is determined by the plate thickness. 10 is for correcting the residual strain existing in the embossed coil A' with a leveler, and upper rollers 10a ₁ , 10a ₂ , 10a ₃ , . . . 10
an (shown up to 10a ₃ in Figure 3), lower roller 10
b ₁ , 10b ₂ , 10b ₃ , ...10bn (1 in Figure 3)
0b to ₄ ) in a zigzag pattern, and the gap G between the upper roller group 10a and the lower roller group 10b can be adjusted. 1
1 is a tensioning pinch roller which rotates faster than the embossing roll 9, so that the coil A' is passed through the steps of the embossing roll 9 and the leveler 10 while being stretched (under tension). 12 is a three-dimensional effect promoter coating machine (hereinafter simply referred to as a coating machine)
Then, the three-dimensional effect enhancer D is applied from only one direction to the entire surface of the concave pattern B and convex pattern C as shown in FIGS. 2a and 2b, for example. That is, the three-dimensional effect enhancer D is applied only to the surfaces that collide with the three-dimensional effect enhancer D at the concave pattern surface B, the top surface E of the convex pattern C, and the side surface F of the convex pattern C, as shown in FIGS. membranous, punctate,
One or more of the linear shapes, and the shading that functions as a shadow depending on the angle θ (0 to 90 degrees) of the applicator 12, the shape and depth of the uneven pattern, and the moving speed of the coil A'. It is formed according to the purpose to enhance the three-dimensional effect and to create the illusion that the uneven patterns B and C appear to be reversed depending on the viewing direction. Note that as this type of device, one of a spray gun and a roll coater is used. Note that θ=
The angles of 0° and 90° make use of the fact that the coil A' is passed through the coil A' at a high speed and the three-dimensional effect enhancer D is not present in a certain area of the so-called convex pattern side surface on the back surface in the direction of travel. 13, the three-dimensional effect enhancer D on the top surface E of the convex pattern is wiped off with a wiping machine to expose the decorative coating film. The wiping machine 13 has a plurality of stages (only one stage is shown in the figure) arranged in parallel and gradually wipes off the three-dimensional effect enhancing agent D. The wiping machine 13 includes a wiping roller 13a, a back up roller 13b, a doctor blade 13c, and a feed roller 13d that supplies a solvent H, such as petroleum, water, thinner, etc., to the wiping roller 13a. Reference numeral 14 is a drying oven in which the top surface of the convex pattern of the concavo-convex pattern surface is dried, and the three-dimensional effect enhancer D is dried or baked. Next, the operation of the reinforcing 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 portion 4 under a certain allowable tension. This is what will be sent. And loop part 4
The coil A is then fed to the heater section 5 via a pinch roller 6 which also serves as a guide, to a heater 7, where it is heated to about 30 to 60 DEG C. to soften the decorative coating, and then fed to a bridle roll 8. The pinch roller 6 that also serves as a guide functions as a pinch roller until the coil A is stabilized on the bridle roll 8, and thereafter functions as a mere guide roller. Next, the coil A sent out from the bridle roll 8 is sent to the embossing roll 9 after reducing or removing curling curls, and the coil A is given a concave pattern B as shown in FIGS. 2a and 2b, for example. An embossed pattern consisting of convex patterns C is continuously formed.
At this time, the embossing is performed with tension being applied to the coil A. and,
The coil A' sent out from the embossing roll 9 is moved by the leveler 10 to the embossing roll 9 and the tension pinch roller 11 to remove the residual strain generated during embossing.
The stretched state is corrected and fed to the coating machine 12. The force relationship between the embossing roll 9 and the tensioning pinch roller 11 with respect to the coil A' is set such that the rotation of the tensioning pinch roller 11 is faster when the rotation of the embossing roll 9 is used as a reference. While the coil A′ is made flat as a whole without destroying the embossing and uneven patterns B and C when the coil A′ is in tension,
This is to remove residual distortion. As a result, coil A' becomes mountain-like in the above region,
It will no longer twist and move, or shift during embossing, resulting in unclear patterns or double bites. In addition, since tension is applied in one direction in the leveler 10 , the coil
As mentioned above, A' can be easily flattened 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. In addition, the coil sent out from the tensioning pinch roller 11
A' is a three-dimensional enhancer D that differs from the makeup film in at least one of density, hue, and saturation depending on the applicator 12.
It is applied and adhered to the entire surface of the uneven patterned surface as shown in Fig. 4 a to c using a spray gun, for example, at an angle of θ = 45°, facing the direction of travel of the coil A'. be. Of course, at this time, the distribution of the three-dimensional effect enhancer D in each part of the concave pattern B and the convex pattern C may be 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 three-dimensional effect promoter D applied to the top surface of the convex pattern C, and applies the coil A' onto the top surface of the convex pattern C. The decorative coating film is exposed and fed to the drying oven 14, where the three-dimensional effect promoting material D is dried or baked. Example A colored galvanized iron plate (JIS-G-3312) with a plate thickness of 0.27 mm is used as the coil A, and the temperature of the heater 7 is 10 to 10.
The temperature was changed 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 18 m/min. In addition, an embossing roll 9 and a tensioning pinch roller 1 are also provided.
The speed difference between 1 and 2 was about 2%. The three-dimensional effect promoter D is a paint made of a black alkyd resin applied with a spray gun. Of course,
A test piece was prepared by wiping off the three-dimensional effect enhancer D on the top surface of the convex pattern and baking the three-dimensional effect enhancer D on it. The paint for coil A is white and uses alkyd resin as a vehicle. When the temperature of the surface of the coil A, the so-called temperature of the decorative film (in this case, the paint film) is changed from 0 to 80°C, the decorative film peels off, cracks, cracks, shrinks, etc.
The state of the flaws is shown in a line graph in Figure 5. Further, the flatness and degree of residual strain (pekotsuki) 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 uneven pattern surface is visually observed when the coil A is propped up in the advancing direction and in the opposite direction. Comparative example Coil A as described above was embossed in the previous process, and then a paint of a color different from that of the coil was applied using a spray gun from directly above the so-called uneven pattern surface using the usual method. The dried material was used as a test piece. The appearance of the uneven pattern is shown in FIG.

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

[Table] What has been described above is only one embodiment of the reinforcing device according to the present invention, and it is possible to keep the temperature from the heater 7 to the tensioning pinch roller 11 within a temperature range of about 30 to 60°C, and to create uneven patterns B and C. Depending on the distribution ratio, the number of stages of the leveler rollers can be increased, the uneven pattern can be arranged so that it spreads from the center, or the uneven pattern can be distributed only over a certain width. Further, the top surface of the convex pattern can be made into a mirror surface, a matte surface, or an inclined surface as shown in FIG. 7. Furthermore, the applicator 12 can be used to apply the three-dimensional effect enhancer D at any angle from one side or two sides of the coil A', and a magnifying glass or video camera can be placed at the position shown by the dashed line in FIG. It is also possible to install a device to more clearly monitor the decorative surface after embossing. As described above, according to the reinforcing device according to 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 creates beautiful unevenness. Can form a shape pattern. Because the decorative pattern is heated to make it soft enough for embossing, the decorative coating may peel off from the steel plate during embossing, or the decorative coating may wrinkle, crack, scratch, or crack. Without,
It can form beautiful cosmetic coatings with excellent weather resistance, scratch resistance, and chemical resistance. The unevenness due to the distortion formed by embossing can be easily and sufficiently removed by correction under tension, and an uneven pattern with no unevenness 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. Embossing is performed by heating the coil, so it is not affected by the work environment even if the line is not kept at a constant temperature. The straight line allows for high-speed embossing. The top surface of the convex pattern of the concave-convex pattern is made into a highly reflective surface, and at least the sides of the convex pattern are coated with a three-dimensional effect enhancer that functions like a shadow.
Furthermore, the visual enhancement provided by the three-dimensional effect enhancer makes it possible to exhibit an unprecedented three-dimensional effect and depth. The three-dimensional effect enhancer can be easily applied after the uneven pattern surface is formed. Commercially available thin metal sheets (Al,
A three-dimensional effect can be easily added to materials (Fe, Cu, stainless steel). In order to correct the coil winding to some extent before embossing, it is more flat and smooth.
Can be embossed on decorative surfaces without deformation. It has the following characteristics.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the device for enhancing the three-dimensional effect of a decorative surface according to the present invention, FIGS. 2 a and b are explanatory diagrams showing a part of the uneven pattern, and FIG. A perspective view showing an example of the leveler configuration, Fig. 4a
~c is an enlarged explanatory diagram showing the process of forming the decorative surface;
Fig. 5 is a characteristic diagram showing the temperature of the decorative film and the occurrence of cracks, etc., Fig. 6 is an explanatory diagram showing a part of the uneven pattern formed using the conventional device, and Fig. 7 is a diagram showing other examples. FIG. 1 ...Thin metal plate delivery section, 5 ...Heater section, 8...
...Bridal roll, 9...Emboss roll, 1
0... Leveler, A, A'... Metal thin plate.

Claims (1)

[Claims] 1. In an apparatus for forming a concavo-convex pattern on a thin metal plate by embossing, there is a thin metal plate feeding unit consisting of an uncoiler and a pinch roller for feeding the thin metal plate, and a thin metal plate fed from the feeding unit to loosen the thin metal plate. a loop section that accommodates the thin metal sheet and adjusts the process before and after the process, a heater section that heats the thin metal sheet to approximately 30 to 60 degrees Celsius, and a bridle roll that is disposed after the heater section and removes curls in the thin metal sheet. , an embossing roll that applies an arbitrary uneven pattern to the thin metal sheet sent out from the roll, a leveler placed after the roll, a tensioning pinch roller placed at the exit of the leveler, and a metal sheet processed by the embossing roll. a three-dimensional effect promoter applicator that applies a three-dimensional effect enhancer from only one direction to the uneven patterned surface of a thin metal plate, a wiping machine that wipes off the three-dimensional effect enhancer existing on the top surface of the convex pattern, and the three-dimensional effect enhancer A device for enhancing the three-dimensional effect of a decorative surface, characterized in that a drying oven for drying the cosmetic surface and a drying oven are arranged in series.