Method for manufacturing a component having a wood-like painted surface similar to natural wood, and apparatus for manufacturing a component having a wood-like painted surface similar to natural wood.

Abstract

The present invention provides a manufacturing apparatus that automatically produces wood-like painted components that have a wood-like appearance and whose texture and feel are similar to those of natural wood, by applying a paint material to an appropriate base material. [Solution] A manufacturing apparatus for a member having a wood-like painted surface, which fully automatically performs a series of operations without human intervention, including: uniformly applying a first coating material to a suitable base material to form a first coating layer; uniformly or unevenly applying a second coating material on the first coating layer to form a second coating layer; partially scraping the second coating material of the second coating layer with a scraping member having a scraping pattern to create a random pattern; and drying it.

Description

Technical Field

[0001] The present invention relates to a member having a wood-like painted surface approximated to natural wood on at least one surface of an arbitrarily selected base material part, a method for manufacturing a member having a wood-like painted surface approximated to natural wood on at least one surface of an arbitrarily selected base material part, and an apparatus for manufacturing a member having a wood-like painted surface approximated to natural wood on at least one surface of an arbitrarily selected base material part. More specifically, it relates to a method and an apparatus for automatically manufacturing, without manual intervention, a member having a wood-like painted surface approximated to natural wood by applying a wood-like paint material, in which wood powder and cellulose nanofiber (CNF) components are mixed in a synthetic resin component and the wood powder is dispersed and arranged substantially uniformly in the synthetic resin component, onto the surface of an appropriate base material part.

Background Art

[0002] Conventionally, wood has been frequently used as building materials and furniture materials, and the consumption of wood has accordingly reached a significant amount. In recent years, however, problems such as global warming, air pollution, and the occurrence of natural disasters have surfaced. Along with this, the need to strengthen forest protection and prohibit large-scale logging of wood has increased, and the production volume of raw materials for building materials and furniture materials has tended to decrease. As a result, the demand has exceeded the production volume, and adverse effects such as soaring wood prices have begun to occur. Taking such a situation into consideration, as a means to meet the demand for wood while anticipating a decrease in production volume, the production and utilization of recycled wood obtained by recycling used or waste wood, and the production of pseudo-wood using non-wood materials are desired. In addition, a method of manufacturing pseudo-wood having an appearance, corrosion feeling, or texture approximated to natural wood by applying a paint having the appearance, corrosion feeling, or texture of natural wood onto the surface of an appropriate base material part made of wood, metal, synthetic resin, or the like has been conventionally studied in many cases.

[0003] As for methods for manufacturing the imitation wood and recycling waste wood, for example, there are known methods such as applying a coating that mimics the appearance and feel of natural wood to the surface of the waste wood or the surface of a metal substrate, as shown in Japanese Patent Publication No. 59-19236 (Patent Document 1), Japanese Patent Publication No. 2000-343030 (Patent Document 2), or Japanese Patent Publication No. 2009-209237 (Patent Document 3), and as shown in Japanese Patent Publication No. 2015-137340 (Patent Document 4) As described above, there is a method for producing synthetic resin wood that has the appearance, texture, and feel of wood by mixing cellulose fiber components into appropriate synthetic resin components and molding it into a wood-like shape. Furthermore, there is a known method for embossing a wood-grain pattern on the surface of a synthetic resin body or metal material using an appropriate apparatus, as shown in Japanese Patent Publication No. 2008-120019 (Patent Document 5) and Japanese Patent No. 3030009 (Patent Document 6).

[0004] On the other hand, Japanese Patent Publication No. 2019-217486 (Patent Document 7) discloses a technique for forming a coating film layer on the surface of a suitable substrate using a suitable coating material, and then forming an irregular pattern on the surface of the coating film layer by bringing a pressing member having a suitable surface shape into contact with the surface of the coating film layer and sliding the pressing member along the surface of the coating film layer. However, it was not possible to form patterns including the surface patterns of natural wood, such as flat grain, straight grain, figured grain, etc. Furthermore, Japanese Patent Publication No. 2021-123723 (Patent Document 8) states that because the brush or wood grainer part is operated manually by an operator, similar patterns are often repeated frequently in short cycles, making it impossible to form the random, uneven, and almost non-repeating patterns of natural wood over a long distance along the longitudinal direction of the base material.

[0005] On the other hand, manufacturing techniques for imitation wood based on synthetic resins mixed with fiber components, and methods for creating wood grain patterns by embossing the outer surface of synthetic resin or metal materials, both resulted in high manufacturing costs. Moreover, it was difficult to produce imitation wood that possessed similar characteristics to natural wood in terms of appearance, texture, and feel, both inexpensively and easily. Furthermore, efforts have been made to develop paints that exhibit properties similar to the appearance, texture, and feel of natural wood. For example, even if wood powder (wood shavings) is mixed into the soluble synthetic resin component that forms the base of the paint, the wood powder will bind together firmly to each other, forming large lumps, making it unsuitable for painting and virtually impossible to impart the same feel, appearance, and texture as natural wood to a non-wood substrate. In such cases, particularly when using spray painting, nozzle clogging was a major problem. Therefore, in Patent Document 8, in order to solve the above problem, a synthetic resin composition for forming a coating film is proposed, which is composed of a synthetic resin component, a wood powder component, and a cellulose nanofiber (CNF) component, wherein the wood powder component is uniformly dispersed within the synthetic resin composition.

[0006] The inventors of this application have diligently studied how to solve the shortcomings of the prior art described above, and as a result have developed a technology that enables the fully automated, efficient, and inexpensive manufacturing of components having a wood-like painted surface that closely resembles natural wood, without human intervention, by primarily using the aforementioned paint. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 59-19236 [Patent Document 2] Japanese Patent Publication No. 2000-343030 [Patent Document 3] Japanese Patent Publication No. 2009-209237 [Patent Document 4] Japanese Patent Publication No. 2015-137340 [Patent Document 5] Japanese Patent Publication No. 2008-120019 [Patent Document 6] Patent No. 3030009 [Patent Document 7] Japanese Patent Publication No. 2019-217486 [Patent Document 8] Japanese Patent Publication No. 2021-123723 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0008] Accordingly, the object of the present invention is to provide a method and apparatus for manufacturing a member having a wood-like painted surface that approximates natural wood, using a paint mainly made of a synthetic resin composition in which fine wood powder or sawdust, etc., are uniformly dispersed individually and independently in a desired synthetic resin composition without agglomerating with each other, and on the surface of a base material made of appropriate materials, a group of patterns such as flat grain, straight grain, and figured grain of natural wood are irregularly and randomly formed, thereby manufacturing the member fully automatically using a mechanical device without any human intervention. [Means for solving the problem]

[0009] The member having a wood-like painted surface that approximates natural wood according to the first aspect of the present invention employs the following basic technical configuration in order to achieve the above-mentioned objective. Specifically, a first coating layer is formed on the surface of at least one portion of a substrate having an appropriate cross-sectional shape, comprising a synthetic resin composition composed of a synthetic resin component, a wood powder component, and a cellulose nanofiber (CNF) component, wherein the wood powder component is uniformly dispersed within the synthetic resin composition, and at least one first coating layer having a uniform thickness of 0.02 mm to 0.06 mm, preferably 0.03 mm to 0.05 mm, and on the upper surface of the first coating layer is a first coating layer made of the same or a different first coating layer that constitutes the first coating layer. A member having a wood-like painted surface that closely resembles natural wood, characterized in that a coating layer is made of a second film-forming synthetic resin composition having a viscosity and / or at least one of hue, lightness, and chroma different from the first synthetic resin composition, and the coating layer has a uniform or non-uniform height of 0.003 mm to 0.03 mm, preferably 0.005 mm to 0.02 mm, from the upper surface of the first coating layer, and a pattern is formed which protrudes from the upper surface of the first coating layer in the form of points, broken lines, or continuous lines, and within a continuous range of 20 m arbitrarily measured along the longitudinal direction of the base material in the pattern, there are no repeating portions of the pattern.

[0010] Furthermore, in the second aspect of the present invention, after applying a suitable first coating material to at least one surface of the substrate to be coated, and preferably after drying, the coated substrate is moved via a suitable transport means, and a second coating material, which is the same as or different from the first coating material, is applied to the surface of the coated substrate, and while the second coating material is still wet, a desired paint scraping pattern is attached to the curved surface of a holder having a desired curved surface on the surface to which the second coating material has been applied. When continuously and without human intervention the operation of bringing the patterned surface of a paint scraping member into contact with the substrate to be painted, and partially scraping off the undried paint by swinging the paint scraping member within an appropriate range about the longitudinal axis of the holder of the paint scraping member, thereby forming continuous linear and / or discontinuous linear and / or point-like protrusions made of the second paint material on the surface of the substrate to be painted, at least the swing angle and / or swing speed about the longitudinal axis of the holder of the paint scraping member are controlled by the conveying means to the substrate A method for manufacturing a member having a wood-like painted surface that approximates natural wood, characterized in that it is automatically and randomly changed in response to random signal information generated from a separately provided random signal information generation means, in conjunction with the movement speed of the part, and a third aspect of the present invention is an apparatus for continuously performing the operation of partially scraping off the undried paint on the surface of the painted substrate, which is coated with an appropriate paint material on at least one surface of the substrate to be painted, while moving the painted substrate via an appropriate transport means, and bringing the outer surface of one of the selected patterns into contact with the undried paint on the surface of the painted substrate, while swinging the paint scraping member within an appropriate range about the longitudinal axis of the holder of the paint scraping member, thereby forming continuous linear and / or discontinuous and / or point-like protrusions made of the paint on the surface of the substrate to be painted, and at least,The paint scraping member is provided with a swing angle / swing speed changing drive means for swinging the holding portion of the paint scraping member at an appropriate swing angle and / or swing speed about its longitudinal axis, and a transport means for driving the transport means for moving the base material portion at an appropriate speed. The swing angle / swing speed changing drive means and the transport speed changing drive means are each provided with a swing angle / swing speed changing drive means control unit for controlling the swing angle / swing speed changing drive means and a transport speed changing drive means control unit for controlling the transport speed changing drive means, and the swing angle / swing speed This is a manufacturing apparatus for a component having a wood-like painted surface that closely resembles natural wood, characterized in that the oscillation angle / oscillation speed change drive means and the transport speed change drive means are interconnected, and the oscillation angle / oscillation speed change drive means control unit and / or the transport speed change drive means control unit are individually, automatically, and randomly controlled in response to random signal information generated from one or more separately provided random signal information generation means, thereby individually, automatically, and randomly driving the oscillation angle / oscillation speed change drive means and the transport means drive means. [Effects of the Invention]

[0011] The present invention provides a component having a wood-like painted surface that closely resembles natural wood, a method for manufacturing the same, and a manufacturing apparatus thereof. As a result of adopting the basic technical configuration described above, it is possible to manufacture components for building materials or furniture materials, etc., that have a painted surface with a wood-like appearance, texture, or feel that more closely resembles natural wood than conventional wood-like components obtained by the same type of painting, fully automatically, inexpensively, and efficiently without human intervention. Furthermore, the resulting coating on the component is a high-quality coating that more closely resembles the appearance, texture, and feel of natural wood than conventional paints that merely mimic the texture, appearance, and feel of wood. This allows for the recycling of waste wood, as well as the easy production of imitation wood by applying the coating to the surface of metal or synthetic resin substrates. This contributes to reducing the consumption of natural wood, promoting the preservation of forest systems, preventing natural disasters, and significantly contributing to preventing air pollution and global warming.

Brief Description of the Drawings

[0012] [Figure 1] FIG. 1 is a perspective view for explaining an outline of a woody coating member obtained by the present invention. [Figure 2] FIG. 2 is a side view and a plan view for explaining a manufacturing method of a woody coating member obtained by the present invention. [Figure 3] FIG. 3 is a block diagram showing an example of a control circuit used for a part of a drive control means of each element drive device in the present invention. [Figure 4] FIG. 4 is a view for explaining a specific example of a paint coating device 700 used in the second step (first paint coating step) in the present invention. [Figure 5] FIG. 5 is a view for explaining a specific example of a paint coating device 800 used in the third step (second paint coating step) in the present invention. [Figure 6] FIG. 6 is a perspective view showing an example of a device for sliding a substrate part used in the third step and a fourth step described later in the present invention in a direction orthogonal to the conveyance direction of the substrate part. [Figure 7] FIG. 7 is a plan view showing a part of a specific example of a coating pattern when applying the second paint material to the surface of the substrate part in the third step in the present invention. [Figure 8] FIG. 8 is a plan view and a perspective view showing a configuration of a specific example of a scraping device used in the third step in the present invention. [Figure 9] FIG. 9 is a side view for explaining a function of a scraping device used in the present invention. [Figure 10] FIG. 1 is a plan view showing an example of a pattern of a perspective view pattern showing a configuration of another specific example of a scraping device used in the present invention. [Figure 11] FIG. 11 is a perspective view for explaining an outline of a configuration of a synthetic resin composition for film formation used in the present invention. [Figure 12] FIG. 12 is a front view for explaining an outline of a configuration of a synthetic resin composition for film formation used in the present invention. [Figure 13] Figure 13 is a perspective view showing an example of a scraping pattern selection means for a scraping device used in the present invention. [Figure 14] Figure 14 is a perspective view illustrating the schematic configuration of yet another specific example of the present invention. [Figure 15] Figure 15 is a front view illustrating the schematic configuration of yet another specific example of the present invention. [Figure 16] Figure 16 shows experimental results to demonstrate that the wood grain pattern of the painted product in the present invention is random. Ten sample base parts, each 200 cm long and painted for comparative inspection with the above-mentioned reference photograph A, were arranged in parallel in the vertical direction. Each sample base part was divided into sections of 20 cm along its length, and the wood grain pattern within each section was photographed. The results of judging each of the 100 images taken from these sections, along with the results of image recognition and visual estimation, are shown. [Figure 17] Figure 17 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph B as the reference photograph. [Figure 18] Figure 18 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph C as the reference photograph. [Figure 19] Figure 19 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph D as the reference photograph. [Figure 20] Figure 20 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph E as the reference photograph. [Figure 21] Figure 21 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph F as the reference photograph. [Figure 22] Figure 22 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph G as the reference photograph. [Figure 23]Figure 23 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph H as the reference photograph. [Figure 24] Figure 24 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph I as the reference photograph. [Figure 25] Figure 25 shows the results of a comparative test similar to that in Figure 16, using the aforementioned reference photograph J as the reference photograph. [Modes for carrying out the invention]

[0013] Specific examples of members having a wood-like painted surface similar to natural wood according to the present invention will be described in detail below with reference to the drawings. That is, as shown in Figure 1, the basic technical configuration of the member 30 having a wood-like painted surface similar to natural wood, which is the first embodiment of the invention, is a synthetic resin composition 10 composed of a synthetic resin component, a wood powder component, and a cellulose nanofiber (CNF) component, which is applied to at least one surface portion 7 of a base material 1 having an appropriate cross-sectional shape, wherein the wood powder component is uniformly dispersed within the synthetic resin composition, and at least one first coating layer 2 is formed thereon, having a uniform thickness of 0.02 mm to 0.06 mm, preferably 0.03 mm to 0.05 mm, and the upper surface of the first coating layer 2 is made of the same or a different synthetic resin composition for film formation as the first coating material constituting the first coating layer 2. The present invention relates to a member 30 having a wood-like painted surface that closely resembles natural wood, characterized in that the object 10 comprises a second coating material consisting of a second film-forming synthetic resin composition having a viscosity and / or at least one of the hue, lightness, and chroma of the first coating material, the second coating layer 4 having a uniform or non-uniform height of 0.003 mm to 0.03 mm, preferably 0.005 mm to 0.02 mm, from the upper surface of the first coating layer 2, and patterned portions 50, 51 are formed on the upper surface of the first coating layer 2, protruding from the upper surface of the first coating layer 2 in a dotted, broken, or continuous linear manner with an appropriate height, and within a continuous range of 20 m arbitrarily measured along the longitudinal direction of the base material 1 in the patterned portions 50, 51, there are no repeating portions of the patterned portions 50, 51 at all.

[0014] In other words, in the member 30 having a wood-like painted surface that approximates natural wood according to the present invention, when its length in the longitudinal direction, which is commonly used as a building material or furniture material, is 20m or less, it indicates that there are no repeating patterns at all within the patterned sections 50, 51, and that an uneven and random wood grain pattern that approximates natural wood grain is formed. In this invention, the method for defining an uneven and random pattern can be specified by individually defining appropriate random functions and unevenness functions. In short, in conventional painting operations, workers manually used tools such as brushes to create patterns unique to wood, such as flat grain, quarter grain, figured grain, and knots. However, this method had the drawback of repeatedly reproducing the same pattern at very short intervals, making it impossible to express wood-like patterns that approximate the uneven and randomly formed patterns of natural wood. Furthermore, it was not only expensive to produce but also inefficient, making it an uneconomical manufacturing method. Therefore, after diligent study, the inventors of this application have developed a method and apparatus that enables the inexpensive and efficient production of components having a wood-like painted surface similar to natural wood by using fully automated machinery and equipment that does not require human intervention, and by continuously and irregularly applying a pattern unique to wood, which includes summer and winter growth rings, as well as flat grain, quarter grain, figured grain, knots, etc., to the surface of an appropriate substrate without repeating patterns.

[0015] To explain the randomness of the formed pattern in this invention, the wood grain pattern formed by the wood grain pattern formation method based on the technical concept described later in this invention is characterized by its high randomness, which is almost the same as that of natural wood grain, and the probability of reproducing the same or similar pattern is almost zero. Although the pattern is artificially formed, it has the pattern characteristics of natural wood, which is highly random and has no repeating patterns at all, and it is extremely difficult to define this state specifically and numerically. Therefore, the inventors of the present invention have set a condition that, in the wood grain pattern formed in the present invention, there are no repeating portions of the pattern within a continuous range of 20m arbitrarily measured along the longitudinal direction of the base material in the pattern. As a prerequisite, the inventors investigated how the pattern formation state changes when the driving speed of the belt conveyor 81 and / or 91, the paint ejection position of the second paint material discharge unit 805 in the second coating process, and the position of the rotational center axis of the scraping device 95 in the scraping process are each individually changed in order to accurately perform the painting process according to the present invention, which will be described later.

[0016] Specifically, first, (1) the power of the speed conversion belt drive of the belt bearing 91 was used to generate an operation that was not identical within a certain period, so as not to make the movement of the belt constant, and within this non-constant operation there was a period in which the speed was converted every 5 seconds, and the same pattern was repeated every 120 seconds. Specifically, for example, the moving speed of the belt conveyor 19 was gradually increased from 0.70 m per minute by 0.05 m every 5 seconds, resulting in 24 speed increase operations within a 120-second cycle. For example, the operation of changing the moving speed of the label conveyor 19 every 5 seconds to 0.70 m / min, 0.75 m / min, 0.80 m / min, 0.85 m / min, 0.90 m / min, 0.95 m / min, 1.00 m / min, ... 1.70 m / min, 1.75 m / min, 1.80 m / min, 1.85 m / min is repeated every 120 seconds. Afterward, it is possible to return to the original state, or to decelerate after accelerating. Furthermore, it is also possible to randomly select and set the above-mentioned speed settings in chronological order.

[0017] On the other hand, (2) with respect to the randomization of the operation of the wood grain patterning device, the wood grain patterning device is structured to create a wood grain pattern by scraping off paint that forms a straight grain or flat grain pattern (winter growth ring). For example, the rotational axis 96 of the paint scraping member 95, which will be described later, can be moved left and right within a range of 30 mm in a direction perpendicular to the rotational axis, and the period can be set to 20 seconds. By performing this operation, an elliptical motion is generated on the circumferential surface of the paint scraping member 95, resulting in a circumference approximately three times longer than the period during the normal oscillating rotational motion of the paint scraping member 95. Next, (3) the liquid dotting operation (dotting and coloring operation) that utilizes the time difference of the paint in the second paint application process will be explained. When applying a dark color to add an accent to the wood grain pattern, when applying the liquid from the top of the painted surface, the second paint material discharge unit 805 itself is swung from side to side in a direction perpendicular to the driving method of the conveyor belt 81 to prevent the paint from adhering to the same spot, thereby creating an uneven gradient pattern in the straight grain or flat grain pattern. The period of this operation is, for example, every 15 seconds.

[0018] By performing the three types of operations described above simultaneously, the combination of 120-second, 20-second, and 15-second cycles gives a probability of 1 in 120 × 15 × 20 = 1 in 36,000 for a similar pattern to occur. Furthermore, since the position and angle at which the object being coated passes through the wood grain patterning device differ each time, the probability of the same wood grain pattern being formed on the object is even lower than the probability mentioned above. Furthermore, a sliding device may be installed on the line to cause the object to be painted to swing from side to side as it passes through the conveyor, thereby causing the painted surface to repeat subtle meandering motions. In addition, the addition of meandering motion creates non-uniformity in the position where the object passes through the wood grain patterning device and the position where the liquid is applied. In other words, the probability of the same wood grain pattern occurring due to the combination of the above operations becomes astronomical. Moreover, as will be described later in this invention, by setting the driving conditions of each drive operation part to be randomly selected by a suitable random condition generating means or a mechanically random condition generating means such as a random gear, or by corresponding to a suitable random signal, it is clear that the randomness will be further improved and the probability of the same pattern occurring will be further reduced.

[0019] Furthermore, in order to quantify the randomness of the formed wood grain pattern, the inventors conducted the following experiment and measured the degree of randomness of the pattern. Specifically, with respect to a base material with a wood grain pattern coating obtained by applying a coating treatment according to the present invention, described later, to one surface of a metallic base material having a width of 10 cm and a length of 2000 cm (2 m), the wood grain pattern formed on the surface of the base material, which is formed within a region (first region) from the tip of one side as viewed in the longitudinal axis direction to a part 40 cm away in the longitudinal direction of the base material, is stored as sample data in an appropriate storage means as image information using an appropriate image recording means.

[0020] Next, the wood grain pattern of the first region is separately stored as image information using the image means, and then an image of the first region is taken and stored again using appropriate image processing means. After that, the image information acquired this time is compared with the stored sample data, and it is determined using appropriate image processing means whether the two sets of image information are identical or similar. It goes without saying that the wood grain pattern of the first region is, naturally, identical to the stored image information of the specimen. Next, another wood grain pattern formed in a different region (the second region) adjacent to the other end of the first region and measured in the direction away from the first end to a point 40 cm away is recorded as image information using appropriate image recording means. Then, as described above, it is compared with the sample data and determined using appropriate image processing means whether the two sets of image information are identical or similar. In the above experiment according to the present invention, the image processing operation is performed individually for each of the 50 regions (regions 1 to 50) formed from one end of the substrate to the other end 2000 cm away, comparing the image with the sample data.

[0021] In other words, for 50 inspection areas, image processing was used to compare and determine the results with the sample data. Naturally, it was clear that the wood grain pattern in the first 40 cm area (the first area) was identical to that of the sample data. However, in all other areas (defined at 40 cm intervals in the length direction, from the second area to the 50th area), no patterns identical or similar to those of the sample data were revealed. In other words, out of 50 inspection areas, only the first area was found to have the same pattern; the rest were determined to be nonexistent. In other words, the degree of randomness in this invention is 1 / 50 = 0.02, and it is preferable that the degree of randomness of the patterned portion in this invention be 0.02 or less.

[0022] Furthermore, the inventors conducted the following experiments to improve the accuracy of the randomness of the pattern relative to the measured value. Specifically, with respect to a base material with a wood grain pattern coating obtained by applying a coating treatment according to the present invention, described later, to one surface of a metallic base material having a width of 10 cm and a length of 2000 cm (2 m), the wood grain pattern formed on the surface of the base material, which is formed within a region (first region) from one end (referred to as the reference end) to a point 100 cm away in the longitudinal direction of the base material, is stored as sample data in an appropriate storage means as image information using an appropriate image recording means. Next, the wood grain pattern of the first region is stored as image information using image processing means. Then, an image of the first region is captured and stored again using appropriate image processing means. After that, the image information acquired this time is compared with the stored sample data, and it is determined using appropriate image processing means whether the two sets of image information are identical or similar. It goes without saying that the wood grain pattern of the first region is, naturally, identical to the stored image information of the specimen.

[0023] Next, another wood grain pattern formed within a second region (where half of the first region overlaps with the first region) is created by shifting the first region by 50 cm from the reference end to the other end by the length of the first region. This pattern is then recorded as image information using appropriate image recording means. As described above, this is then compared with the sample data, and appropriate image processing means are used to determine whether the two sets of image information are identical or similar. In the aforementioned experiment according to the present invention, the image processing operation is performed individually for each of the 40 regions (regions 1 to 40) formed by sequentially shifting them by 50 cm, comparing them with the sample data. (Therefore, in practice, the length of the substrate to be inspected needs to be 2050 cm.) In other words, the image processing means was used to compare and determine the sample data for each of the 40 inspection areas. Naturally, it was clear that the wood grain pattern in the first 100 cm area (the first area) was identical to that of the sample data, but no patterns identical or similar to those of the sample data were found in any of the other areas. In other words, out of 40 inspection areas, only the first area was found to have the same pattern; the rest were determined to be areas with no other identical patterns. In other words, in this experiment, a preferred example of the degree of randomness in this invention is 1 / 40 = 0.025 or less.

[0024] Furthermore, in order to prove that the randomness of the wood grain pattern in the painted products manufactured according to the present invention is remarkably high, the inventor conducted the following experiment and performed comparative verification as shown in Figures 16 to 25 to prove that it is highly random. Specifically, in the painting apparatus according to the present invention as described below, a standard sample plate was prepared by continuously applying a coating treatment to the surface of a steel plate with a width of 12 cm and a length of 200 cm while randomly changing the rotation speed of the main rotating part in response to a random signal. Next, ten partitioned areas were created by dividing the reference sample plate from one end (left end) to the other end (right end) into 20cm intervals. The first partitioned area at the left end was designated as Area A, and the subsequent partitioned areas up to the right end were designated as Areas B through J, respectively. Next, photographs were taken of the wood grain patterns formed in each of the regions A, B, C, D, E, F, G, H, I, and J, and reference photographs A, B, C, D, E, F, G, H, I, and J were created. Subsequently, using the same painting method as the reference sample board described above, ten steel plates, each 12 cm wide and 200 cm long, were painted to create sample painted products for comparative verification. For each of these plates, the wood grain pattern formed in each of the ten sections was photographed in the same manner as when the reference photograph was taken of the reference sample board described above. These photographs were then arranged horizontally in the order they were taken, and this process was repeated for each of the other nine sample painted products used for comparative verification. The results were then arranged in parallel from top to bottom for each sample painted product. In other words, this is an accumulation of 100 wood grain patterns over a length of 20 meters of the painted product according to the present invention, and this is shown in Figures 16 to 25. Next, the results of comparing the wood grain pattern of the sample used for comparison with each of the 10 reference photographs A through J mentioned above are shown in Figures 16 through 25. Specifically, Figure 16 shows that, as a result of comparing the above-mentioned reference photograph A with the above-mentioned 100 wood grain patterns using known image recognition and visual inspection methods, no wood grain patterns identical to those of reference photograph A were found in any of the above-mentioned 100 sample painted products. Similarly, Figure 17 shows that, as a result of comparing the above-mentioned reference photograph B with the above-mentioned 100 wood grain patterns using known image recognition and visual inspection methods, no wood grain patterns identical to those in reference photograph B were found in any of the above-mentioned 100 sample painted products. Furthermore, Figure 18 shows that, as a result of comparing the above-mentioned reference photograph C with the above-mentioned 100 wood grain patterns using known image recognition and visual inspection methods, no wood grain patterns identical to those in reference photograph C were found in any of the above-mentioned 100 sample painted products. Similarly, for each of Figures 19 to 25, the results of comparing each of the above-mentioned reference photographs D to J with the above-mentioned 100 wood grain patterns using known image recognition and visual inspection methods show that no wood grain patterns identical to those in the reference photographs D to J existed in any of the above-mentioned 100 sample painted products.

[0025] Here, the specific configuration of the member 30 having a wood-like painted surface similar to natural wood according to the present invention will be explained. As shown in Figure 1, the base material 1 in the member 30 having a wood-like painted surface similar to natural wood according to the present invention is made of an appropriate material, for example, wood-like materials such as wood, waste wood, and plywood; metal materials such as iron, copper, aluminum, and stainless steel; various steel materials including these; synthetic resin materials; gypsum, cement, and paper materials such as corrugated cardboard. Its cross-sectional shape and dimensions such as length, width, and thickness in the longitudinal direction can be arbitrarily set. Furthermore, in the present invention, a first coating layer 2 made of the first coating material, which is the first synthetic resin composition for forming a coating described above, is formed on the surface 7 of the substrate 1 with a substantially uniform thickness, and it is desirable that the thickness be set in the range of, for example, 0.02 mm to 0.06 mm, preferably 0.03 mm to 0.05 mm. Needless to say, in the present invention, it is possible to insert and place a so-called primer layer or undercoat layer (not shown) made of a coating material of a suitable material that is well known in the coating industry between the surface 7 of the substrate 1 and the first coating layer 2.

[0026] On the other hand, a second coating layer 4 is formed on the surface 3 of the first coating layer 2, which is made of the second coating material, which is the second synthetic resin composition for film formation described above. The second coating layer 4 has a uniform or non-uniform height ranging from 0.003 mm to 0.03 mm, preferably 0.005 mm to 0.02 mm, from the upper surface 3 of the first coating layer 2, and is formed with patterned portions 50, 51 that protrude from the upper surface 3 of the first coating layer 2 in the form of points, broken lines, or continuous lines, and whose widths vary irregularly. In other words, in the present invention, the first coating layer 2 and the second coating layer 4 described above form a grain pattern, including straight grain and flat grain, on at least a part of the surface of the base material 1. In the example in Figure 1, a part 6 of the surface of the first coating layer 2 represents the summer wood, and the second coating layer 4 represents the winter wood, thus expressing the flat grain pattern of natural wood as a whole. Furthermore, it is possible to create wood grain patterns that include appropriate knot patterns. Herein, the first coating material used in the present invention will be described, and it is preferable that the first coating material be a synthetic resin composition composed of a synthetic resin component, a wood powder component, and a cellulose nanofiber (CNF) component, wherein the wood powder component is uniformly dispersed within the synthetic resin composition. Furthermore, it is desirable that the first coating material according to the present invention, a synthetic resin composition for film formation, has the characteristics of being fully recyclable and also achieving a CO2 reduction effect. For example, olefin resins, acrylic resins, urethane resins, fluororesins, epoxy resins, melamine resins, etc., are preferably used.

[0027] On the other hand, the cellulose nanofiber (CNF) component used in the present invention is a fibrous material obtained by finely breaking down and decomposing cellulose fibers that make up wood to the nanoscale, and its fineness, that is, its average diameter, is preferably 1 nm to 100 nm, more preferably 3 nm to 4 nm, its fiber length is several hundred nm to 1 μm, and its aspect ratio is preferably 100 or more. Furthermore, the wood powder or sawdust used in this invention is not particularly limited in terms of wood type or material, and almost all wood materials can be used. In particular, it is desirable to use sawdust or wood powder obtained from wood such as cypress, cedar, and camphor.

[0028] The particle size of the wood powder or sawdust used in this invention is not particularly limited, but for example, those having a particle size of 20 μm to 200 μm can be used, and preferably around 50 μm. Furthermore, the first coating material in the present invention may be used with pigments, hardeners, additives, thickeners, aggregates, etc., as appropriate. On the other hand, the type of solvent used in the first paint material in the present invention is not particularly specified, and an organic solvent generally referred to as thinner and an aqueous solvent mainly composed of water can be appropriately selected and used depending on the purpose of use of the paint and the type of substrate to which it is applied. Furthermore, while it is desirable to vary the mixing ratio of each component in the first coating material, which is a synthetic resin composition for film formation, used in the present invention, depending on its intended use and purpose, generally, it is desirable to mix 0.3 to 10 parts by weight of the wood powder component and 0.5 to 10 parts by weight, preferably 0.5 to 5 parts by weight, of the cellulose nanofiber (CNF) component with 100 parts by weight of the synthetic resin component.

[0029] A specific example of the first coating material is a synthetic resin composition obtained by mixing 100 parts by weight of urethane-based synthetic resin with 0.5 parts by weight of cellulose nanofiber (CNF) component, 1.0 part by weight of 100 μm wood powder, 1.0 part by weight of water-soluble cellulose (CMC), and 40 parts by weight of diluent solvent. To give specific examples of the coating materials used in the present invention, for example, as a specific example of the first coating material, it is desirable to use a coating material obtained by mixing 100 parts by weight of urethane synthetic resin with 0.5 parts by weight of cellulose nanofiber (CNF) component, 1.0 part by weight of wood powder with a length of 100 μm, 1.0 part by weight of water-soluble cellulose (CMC), and 40 parts by weight of diluent solvent. On the other hand, as a specific example of the second coating material, it is desirable to use a coating material obtained by mixing a urethane-based synthetic resin having a different color or hue from that of the first coating layer 2 with 1.0 part by weight of a thickener and 20 parts by weight of a diluent solvent per 100 parts by weight of the urethane-based synthetic resin. Furthermore, while the first paint material described above can be used as a specific example of the second paint material used in the present invention, it is desirable that the color of the first paint be different and that the amount of diluent added be kept to a minimum. On the other hand, the second coating material used in the present invention is a synthetic resin composition for film formation that is the same as or different from the first coating material, and is a synthetic resin composition that differs from the first coating material in viscosity and / or hue, lightness, and chroma. The second coating material in the present invention may use a resin similar to that of the first coating material and contain cellulose nanofiber (CNF) components, wood powder, and water-soluble cellulose (CMC), etc., or it may omit some of these components, or it may not contain any of the cellulose nanofiber (CNF) components, wood powder, and water-soluble cellulose (CMC), etc.

[0030] On the other hand, it is desirable that the viscosity of the second coating material be different from that of the first coating material, or that at least one of its hue, lightness, and chroma be different from that of at least one of the hue, lightness, and chroma of the first coating material. For example, in the present invention, since the first coating material has the function of representing summer trees, a light brown color is selected, and since the second coating material has the function of representing winter trees, a dark brown color is selected, and it is desirable to set the viscosity of the second coating material lower than that of the first coating material. Furthermore, it goes without saying that, in addition to the coating method shown in Figure 1, the back surface, sides, or cross-section of the substrate can also be coated with the same coating material in this invention.

[0031] Furthermore, the method of applying the first coating material or the second coating material to the surface of the substrate in the present invention is not particularly limited, and it is possible to apply it using a paint brush, paint roller, etc., or to perform spray painting using a paint spray nozzle. In the present invention, the thickness range of the first coating layer 2 is preferably 0.03 mm (30 μm) to 0.04 mm (40 μm) when measured in a dry state, as described above, while the thickness range of the second coating layer 4 is preferably 0.005 mm (5 μm) to 0.02 mm (20 μm) when measured in a dry state. Furthermore, one method for adjusting the viscosity of each paint in the present invention is to change the amount of organic solvent mixed in. For example, the viscosity can be diluted by adding 30 to 70 parts of organic solvent to 100 parts of the main paint. Here, it is desirable to appropriately adjust the dilution amount and type of organic solvent depending on the paint or painting environment being used. Next, specific examples of the second and third embodiments of the present invention will be described in detail with reference to the drawings. In other words, the basic technical concept and technical configuration in the second aspect of the present invention is as follows: After applying a suitable first coating material to at least one surface 7 of the substrate portion 1 to be coated, preferably after drying, the coated substrate portion 1 is moved via a suitable transport means, and a second coating material consisting of the same or different coating material as the first coating material is applied to the surfaces 3,6 of the coated substrate portion 1, and while the second coating material is still wet, the pattern surface 941 of a paint scraping member 95, which has a desired paint scraping pattern 94 attached to the curved surface of a holder portion 92 having a desired curved surface, is brought into contact with the surface to which the second coating material has been applied, and the longitudinal axis 96 of the holder portion 92 of the paint scraping member 95 This is a method for manufacturing a member having a wood-like painted surface that resembles natural wood, wherein, when continuously and without human intervention, an operation is performed to partially scrape off the undried second paint while oscillating the center within an appropriate range and / or speed, thereby forming continuous linear and / or discontinuous and / or point-like protrusions 4' made of the second paint material on the surface 6 of the substrate 1 to be painted, the oscillation angle and / or oscillation speed around the longitudinal axis 96 of the holder portion 92 of the paint scraping member 95 is automatically and randomly changed in response to random signal information generated from an electrical or mechanical random signal information generating means or a random gear system, etc., in conjunction with the movement speed of the moving means.

[0032] To further describe the second aspect of the present invention, the method for manufacturing a member having a wood-like painted surface similar to natural wood according to the present invention, as shown in the side view and plan view of Figure 2, basically comprises a loading step 60 having an appropriate transport means, for example, a conveyor belt 61, for transporting a base material 1 having a desired shape and dimensions to a coating step described later, and a step in which the transported base material 1 is moved using an appropriate transport means, for example, a conveyor belt 71, and if necessary, after applying a desired undercoating treatment (primer treatment), a small portion of the base material 1 A first paint application step 70 is performed in which the base material 1, which has been transported from the first paint application step 70, is moved using an appropriate transport means such as a conveyor belt 81, and the second paint application step 80 is performed in which base material 1, which has the first paint application step 2 made of the first paint application step 2 made of the first paint application step 31, 72 is applied to the surface of the base material 1, which has the first paint application step 2 made of the first paint application step 31, 72 is applied to the surface of the base material 1, which has been transported from the first paint application step 70, is moved using an appropriate transport means such as a conveyor belt 81, and the second paint application step 80 is performed in which the second paint application step 80 is performed While the substrate portion 1, which has been transported from the paint application process 80, is moved using an appropriate transport means, such as a conveyor belt 91, the patterned surface 941 of a paint scraping member 95, which has a desired paint scraping pattern 94 attached to the curved surface 93 of a holder portion 92 having a desired curved surface, is brought into contact with the surface to which the second paint materials 41 and 82 have been applied while the second paint materials 41 and 82 are still wet, and the paint scraping member 95 is moved within an appropriate range and / or at an appropriate speed around the longitudinal axis 96 of the holder portion 92 of the paint scraping member 95. The process consists of a paint scraping step 90, in which the undried second paint material 41,82 is partially scraped off while being oscillated at a certain angle to form continuous linear and / or discontinuous linear and / or point-like protrusions 4' made of the second paint material 41,82 on the surface 3 of the substrate 1 to be painted, and a baking and drying step 100, in which the substrate 1, which has been transported from the second paint application step 80, is moved using an appropriate moving means such as a conveyor belt 101, and the substrate 1 is subjected to a baking and drying process.

[0033] In the present invention, as shown in Figure 2, individual conveying means 61, 71, 81, 91, 101 are provided for each process, and these conveying means 61, 71, 81, 91, 101 are individually driven by conveying means drive devices 65, 75, 85, 195, 105, each consisting of an appropriate motor or the like. However, in some cases, it is also possible to use a single conveyor belt that drives through each of the above processes in a continuous and integrated manner, and it goes without saying that it is also possible to configure only the first paint application process 70 and the second paint application process 80 with a single conveying means. Furthermore, in the specific embodiments of the present invention, each individual transport means drive device 65, 75, 85, 195, 105 that drives each individual transport means 61, 71, 81, 91, 101 in each process is provided with an individually independent transport means drive device control unit 66, 76, 86, 196, 106, and each of these transport means drive device control units 66, 76, 86, 196, 106 individually controls the rotational speed and / or rotational direction of the transport means drive device 65, 75, 85, 195, 105 to a desired value in response to a predetermined control signal.

[0034] Each of the transport means drive unit control units 66, 76, 86, 196, and 106 is connected to an external drive instruction signal receiving means 67, 77, 87, 197, and 107, which is configured to receive a predetermined drive control signal transmitted separately from an external source. In response to the random drive control signals received from the external source, each of the transport means drive units 65, 75, 85, 195, and 105 is individually and randomly controlled. Here, regarding specific configuration examples of the drive and conveying means drive device control units 66, 76, 86, 196, and 106 used in the present invention, if we take the configuration of a specific example of the conveying means drive device control unit 76 as an example, as shown in Figure 3, for example, the conveying means drive device control unit 76 is provided with a storage means 791 that stores a plurality of pre-set drive conditions and / or rotation direction conditions so that the rotation speed of the conveying means drive device 75 can be changed in multiple steps individually and independently, or it is provided with a drive condition changing means 791' that can automatically select and change the rotation speed and / or rotation direction conditions in a stepless and continuous manner, and the conveying means drive device control unit 76 is configured to receive a predetermined random drive control signal that is randomly transmitted from an external source. The system is configured to be connected to an external drive instruction signal receiving means 77, and when the external drive instruction signal receiving means 77 receives predetermined random signal information from an external source, it responds to the random signal information by driving another internal random signal information generating means 78 provided in the transport means drive control unit 76, if necessary, to generate another internal random signal information, and in response to the internal random signal information, it drives a drive condition selection means 79 connected to the drive condition storage means 791 or the drive condition changing means 791', and the drive condition selection means 79 arbitrarily, automatically and randomly selects any drive condition from the drive condition storage means 791 or the drive condition changing means 791' to control the transport means drive device 75. In this specific example, it goes without saying that it is also possible to configure the system so that the drive condition storage means 791 or the drive condition changing means 791' is driven directly by the external random drive signal, without using the internal random signal information generation means 78 described above.

[0035] The same configuration can be adopted for each of the other transport means drive devices 65, 85, 195, and 105 in the present invention. The random signal generation means used in the present invention is not particularly limited; conventionally known mechanical or electrical random signal generation devices can be used, as can devices that generate random signals using electronic or quantum systems, and furthermore, random gear systems may be employed, or random signal information generated using AI technology may be used.

[0036] For example, in Figure 2, when controlling the transport means in the first paint application process 70, the second paint application process 80, and the paint scraping process 90, a control signal is first transmitted from an externally provided random signal information generating means 200 to specify which of the three processes the transport means drive devices 75, 85, and 195 should be selected and how, and whether they should be driven simultaneously, in any sequence, and at what time intervals. In this case, it is desirable to configure the system to transmit, individually and randomly, in a time-series manner, drive instruction signals to drive all of the transport means drive devices 75, 85, and 195 in all processes, drive instruction signals to drive only one selected transport means drive device, and drive instruction signals to drive only two arbitrarily selected transport means drive devices simultaneously or irregularly and randomly.

[0037] Subsequently, in a specific step where the external drive instruction signal receiving means (e.g., 77) in any of the three steps 70, 80, and 90 receives the drive instruction signal, the individual random signal information generating means (e.g., 78) generates another random signal information (internal random signal information). In response to this other random signal information, for example, one drive condition is randomly selected from a plurality of drive conditions pre-stored in the appropriate storage means 791, or for example, a specific drive condition is automatically randomly selected by the drive condition selection means 791'. The selected drive condition is then transmitted to the transport means drive device, for example, 75, thereby randomly controlling the transport means drive device, for example, 75. Next, the first paint application step 70, which is the second step in the method for manufacturing a member having a wood-like painted surface similar to natural wood according to the present invention, will be described.

[0038] In other words, in the first paint application step 70, as described above, the first paint material 31,72 is applied using the first coating device 700 while moving the substrate 1, which has been inserted from the aforementioned loading step via appropriate transport means, onto at least one predetermined surface 7 of the substrate 1, and a first coating layer 2 having a uniform thickness made of the first paint material 31,72 is formed on the surface 7 of the substrate 1. In the second step of the present invention, it is also desirable to perform a primer treatment (primer treatment) using an appropriate coating material on the surface 7 of the substrate 1 to be painted with the first coating materials 31, 72 in order to form a primer layer (not shown) of an appropriate thickness beforehand. In the present invention, a first coating device 700 is used to supply the first coating material 31,72 having an appropriate configuration to the surface portion 7 of the substrate portion 1 to be coated, thereby forming a first coating layer portion 2 with a uniform thickness. The thickness is not particularly limited, but it is desirable to have a uniform thickness of, for example, 0.02 mm to 0.06 mm, preferably 0.03 mm to 0.05 mm. Furthermore, as shown in Figure 4, the first coating apparatus 700 in the present invention is provided with an appropriate ink holding tank 701 for storing the first coating materials 31 and 72, and a first coating material discharge unit 705 which has a coating nozzle unit 706 consisting of an appropriate number of the first coating materials 31 and 72, ranging from one to more than one, located in a part of the substrate unit 1 facing the surface 7 to be painted. The ink holding tank 701 and the first coating material discharge unit 705 are connected by at least one appropriate first coating material supply pipe unit 708, and a first coating material supply control means 709 including a valve drive unit for adjusting the supply amount of the first coating materials 31 and 72 to an appropriate value is provided in a part of the first coating material supply pipe unit 708.

[0039] On the other hand, it is also desirable that the first paint material discharge unit 705 be provided with a paint injection nozzle unit control unit 707 for appropriately selecting which nozzle unit of the paint injection nozzle unit 706 from which the predetermined first paint materials 31, 72 will be discharged, and for specifying what amount or for what duration the first paint material 31 will be discharged or sprayed from the selected nozzle unit 706, and that the paint injection nozzle unit control unit 707 be provided with a drive signal receiving means 720 for receiving appropriate drive instruction signals from the outside and randomly selecting and driving the operation of the paint injection nozzle unit control unit 707. Furthermore, in the first coating apparatus 700 of the present invention, it is also possible to provide a viscosity adjustment means 702 for the first paint material having an appropriate configuration in the ink holding tank 701, and it is also desirable that the first paint material supply control means 709 is provided with a paint flow rate adjustment valve drive control means 710 for appropriately changing the open / closed state of an appropriate paint flow rate adjustment valve in the first paint material supply control means 709 in response to an appropriate external control signal.

[0040] However, in the second step of the present invention, the first paint materials 31 and 72, which are set in advance, are formed on the surface portion 7 of the base material portion 1 with a substantially uniform thickness. Therefore, the supply amount and viscosity of the first paint materials 31 and 72, as well as the amount of paint discharged from the paint injection nozzle portion 706, are set to be substantially constant. Thus, it is desirable that the above-mentioned adjustment and control means are not changed in substance. Furthermore, the method of discharging the first paint material from the first paint material discharging section 705 in the present invention may be a spray method, or it may be a method of continuously discharging in a sheet-like manner. Furthermore, a desirable specific example is that, between the second step 70 and the third step described later in the present invention, there is an appropriate drying means 73 for drying the first coating material 31, 72 applied to the surface of the base material 1 in the second step 70.

[0041] Next, the second paint application step, which is the third step 80 in the present invention, will be described. In other words, in the second paint application step 80, as described above, the substrate 1, which has been inserted from the first paint application step 70 via an appropriate transport means, is moved while the first coating layer 2, made of the first paint materials 31 and 72, is formed on at least one predetermined surface 7 of the substrate 1 to be painted. The second paint materials 41 and 82 are applied using the second coating device 800, which will be described later. At the same time, a second coating layer 4 is formed on the upper surface 6 of the first coating layer 2, which is formed on the predetermined surface 7 of the substrate 1 to be painted. This second coating layer 4 is formed on the upper surface 6 of the first coating layer 2, which is made of the second paint materials 41 and 82, and has a uniform or uneven thickness, forming a film, strip, continuous line, intermittent line, or dot shape.

[0042] Furthermore, as shown in Figure 5, the second coating apparatus 800 in the present invention includes, for example, one or more appropriate ink holding tanks 801 for storing the second coating materials 41, 82, and a first coating material discharge unit 805 which has a coating nozzle unit 806 consisting of one to more appropriate numbers of the second coating materials 41, 82, located on the part of the substrate 1 facing the surface 2 to be coated, and the second coating material discharge unit 805 is provided with an appropriate amount of the second coating material between the ink holding tanks 801 and the second coating material discharge unit 805. At least one material supply pipe section 808 is connected, and a flow rate adjustment valve 809 for adjusting the supply amount of the second paint materials 41,82 to an appropriate value and a valve drive device 820 connected to the flow rate adjustment valve 809 for performing the opening and closing operation of the flow rate adjustment valve are provided in a part of the second paint material supply pipe section 808, and a valve drive device control device 821 is provided in the valve drive device 820 that can change and adjust the open and closed state of the valve in the valve drive device 820 to any desired state. Furthermore, it is desirable to have an external signal receiving means 830 connected to the valve drive device control unit 821, and to configure the valve drive device control unit 821 to control the open / closed state of the valve to an appropriately randomly selected state in response to the reception of an appropriate external signal.

[0043] Furthermore, in the second coating apparatus 800 of the present invention, viscosity and color condition adjusting means 802, 802' for adjusting the viscosity or color conditions of the second paint material having an appropriate configuration can also be provided in the ink holding tank 801. In this specific example, as will be described later, complex and irregular shapes and patterned areas with mutually different colors are formed. Therefore, it is desirable to use multiple types of second coating materials 41 and 82 that differ from each other in viscosity and color, that is, at least one of hue, lightness, and saturation. For this reason, as shown in Figure 5, for example, multiple ink holding tanks 801, for example four, may be arranged, and each of them may store individual second coating materials 41 and 82 with mutually different colors. Each of these may be provided with a viscosity adjustment means 802 to adjust the viscosity of the second coating materials 4 and 82 to an appropriate value. Alternatively, the viscosity adjustment means 802 may function as a color adjustment means 802', and the second coating materials 4 and 82 with mutually different colors may be stored individually in each of the multiple ink holding tanks 801.

[0044] In this specific example, when multiple ink holding tanks 801 are used, it is possible to individually connect the desired second coating material 41 from each ink holding tank 801 to the paint injection nozzle section 806 of the paint material discharge section 805 via individual pipes 808. It is also possible to supply the second coating material 4 from a selected portion of the ink holding tanks 801 to all of the paint injection nozzle sections 806 of the paint material discharge section 805. Alternatively, only one ink holding tank 801 may be provided, the viscosity adjustment means 802 may be equipped with a viscosity adjustment function and a color adjustment function, and mutually different second coating materials 41 having desired viscosity and color may be introduced into the ink holding tank 801 in accordance with the time axis, and the second coating material 4 may be discharged from the selected desired paint injection nozzle 806.

[0045] On the other hand, it is also desirable to provide the second paint material discharge unit 805 with a paint injection nozzle unit control unit 807 for appropriately selecting which nozzle unit of the paint injection nozzle unit 806 from which the predetermined second paint material 41 will be discharged, and for specifying what amount or for what duration the second paint material 41 will be discharged or sprayed from the selected nozzle unit 806, and to provide the paint injection nozzle unit control unit 807 with a drive signal receiving means 830' for receiving appropriate drive instruction signals from the outside and selectively driving the operation of the paint injection nozzle unit control unit 807. Furthermore, in the second aspect of the present invention, the method of discharging the second paint material from the second paint material discharging section 805 may be a liquid discharging method or a spray method, and may be discharging in a dot or linear manner, continuously or intermittently, or may be discharging in a sheet manner, intermittently or continuously. Furthermore, in addition to the second method of dispensing the paint material described above, in a second aspect of the present invention, it is also desirable to configure the main body of the second paint material dispensing unit 805 itself to slide from side to side in a direction perpendicular to the direction of movement of the base material unit 1 for an appropriate range of lengths, in order to reproduce the wood grain pattern of natural wood, which is more complex and non-uniform, in the paint scraping process described later. In addition to the specific examples mentioned above, by combining the changes in the dispensing method of the second paint material described above, it becomes possible to arbitrarily form coating patterns as shown in Figure 7, which will be described later.

[0046] In other words, in this specific example, the main body of the second paint material dispensing unit 805 is provided with a second paint material dispensing unit sliding drive means 810, and a second paint material dispensing unit sliding drive means control unit 811 is provided for determining the direction of movement of the second paint material dispensing unit 805 in a direction perpendicular to the direction of movement of the base material unit 1, and / or the distance and / or speed of movement of the second paint material dispensing unit sliding drive means control unit 811, and an external drive signal information receiving means 830 is provided for receiving appropriate drive signal information from an external source (for example, a random drive signal, etc.) to arbitrarily and randomly select and determine the direction of movement and / or distance and / or speed of movement of the second paint material dispensing unit sliding drive means 810, and for moving or displacing the position of the second paint material dispensing unit 805. Furthermore, in this specific embodiment, the second paint material discharge unit sliding drive means control unit 811 may also be provided with a suitable storage means 813 for storing control information relating to preferred specific examples of the direction of movement of the second paint material discharge unit sliding drive means 810 and / or the distance and / or speed of movement, or a control mechanism 813' that can randomly select arbitrary movement conditions may be provided.

[0047] Furthermore, in this specific embodiment, when applying the second coating treatment to the base material 1 while it is moving, the base material 1 itself may be moved and slid over an appropriate distance range at an appropriate timing in a direction perpendicular to the direction of movement of the base material 1. As a specific example, this could involve sliding the belt portion of the third conveying means 81 that moves and conveys the base material portion 1, that is, the entire third conveying means 81, from side to side at an appropriate timing and for an appropriate distance in a direction perpendicular to the direction of movement of the conveying means 81, or it could involve using an appropriate jig to slide the position of the base material portion 1 mounted on the third conveying means 81 from side to side in a direction perpendicular to the driving direction of the third conveying means 81, so that the position of the base material portion 1 on the drive belt is perpendicular to the driving direction of the third conveying means 81. In the former case, as shown in the second paint application process 80 in Figure 2, a transport means displacement drive unit 831 is provided to slide the entire third transport means 81 itself in a direction perpendicular to the transport direction of the substrate part 1, and it is configured to move left and right by an appropriate length at an appropriate timing using an appropriate drive mechanism, such as a motor.

[0048] Furthermore, the transport means displacement drive unit 831 may be provided with a transport means displacement drive unit control unit 832, and a suitable storage means 838 for storing control information relating to preferred specific examples of the movement direction and / or movement distance and / or movement speed of the third transport means 81 may be provided therein, or a control mechanism 838' that can randomly select any such movement conditions may be provided. Furthermore, the transport means displacement drive unit control unit 832 is provided with an external drive signal receiving means 830 for receiving appropriate drive signal information from an external source (for example, a random drive signal, etc.) to select and determine the direction of movement of the third transport means 81 and / or the distance and / or speed of movement, and for moving and displacing the position of the third drive mechanism 81.

[0049] On the other hand, as a specific example of the latter, as shown in Figure 6, a pair of guide members 840 having an appropriate shape are brought into contact with the left and right sides of the base material 1 that is mounted on the third transport means 81 and in motion, and the guide members 840 are moved by a guide member sliding drive device 841 that slides the guide members 840 left and right within an appropriate range in a direction perpendicular to the direction of movement of the transport means 81. The guide member sliding drive device 841 is provided with a guide member sliding drive control unit 842, and a suitable storage means 843 is provided to store control information relating to preferred specific examples of the direction of movement of the guide members 840 and / or the distance and / or the speed of movement, or a control mechanism 843' is provided that can randomly select any such movement conditions. Furthermore, the guide member sliding drive control unit 842 is provided with a drive signal receiving means 844 for receiving appropriate drive signal information from an external source (for example, a random drive signal) to select and determine the direction of movement of the guide member 840 and / or the distance and / or speed of movement, and for arbitrarily and randomly moving and displacing the position of the guide member 840.

[0050] In the above specific example according to the present invention, in the third step (second paint application step) described later, in order to form a second paint film layer 4 consisting of irregular and random patterned portions 50, 51 in an appropriate shape on the surface portion 6 of the first paint film layer 2 formed by the first paint material 3 formed on the surface portion 7 of the substrate portion 1, it is desirable in this step to perform the application work so that the second paint material 41, 82 takes on multiple types of paint film arrangement forms. For this reason, it is desirable to apply it in a film shape that uniformly covers the entire surface 6 of the substrate 1 on which the first paint film layer 2 is formed, as illustrated in Figures 7(A) to (H), or to apply it so that multiple strip-shaped or continuous or discontinuous linear bodies of a predetermined width are arranged in parallel or in a curved manner, or furthermore, to apply it so that multiple types of dot-like states of various shapes are arranged uniformly or unevenly. Each of these arrangement configurations can be formed by irregularly and randomly selecting and driving the supply amount, selection of a specific paint injection nozzle, or sliding displacement operation of the paint material discharge part in the left-right direction, for the desired second coating material 4(41) which has the same or different viscosity and color.

[0051] To this end, in the present invention, it is desirable to provide a drive control unit for controlling the driving operation of each of the above-mentioned drive units provided in the second coating apparatus 800, all or some of the drive units provided therein, and to provide an external drive signal receiving means for receiving an appropriate external drive control signal (for example, a random drive control signal) and driving the drive control unit under predetermined conditions, and to provide an external drive signal receiving means for generating an internal random signal when the external drive signal receiving means receives a predetermined external drive signal, and to configure the drive control unit to either select one of a plurality of drive control conditions for driving the drive unit in advance from a drive condition storage means for storing such conditions in response to the internal random drive signal, or to select a drive condition selection means for automatically selecting an appropriate drive condition in response to the internal random drive signal, and to control the drive unit. In other words, in the present invention, it is desirable that all of the main drive devices in the second coating apparatus 800 be configured to operate and be driven individually and randomly in response to random drive signals input from an external source. In other words, in this invention, since the individual drive mechanisms at various locations move individually and independently in a random manner, the combined synergistic effect of the random drives automatically and efficiently forms complex and uneven patterns with almost no reproducibility of identical patterns.

[0052] Next, a specific example of the fourth step, the paint scraping step 90, in the second embodiment of the present invention will be described in detail with reference to the drawings. In other words, the basic technical concept and technical configuration of the paint scraping process 90 according to the present invention are as shown in Figures 2 and 8, in the second paint application process 80 described above, the base material 1, on which a second paint film layer 4' made of a second coating material 41 has been formed on the surface 6 of the first paint film layer 2 formed on the surface 6 of the base material 1, is transported into the paint scraping process area 90 via appropriate transport means 81 and 91 while the second paint film layer 4 has not yet dried and solidified, and the paint scraping device 900 described later, provided in the paint scraping process 90, scrapes the surface to which the second coating material 41 has been applied while the second coating material 41 is still wet, using the pattern surface 9 of a paint scraping member 95, which has a desired curved surface attached to the curved surface 93 of a holder 92 having a desired curved surface. The paint scraping member 95 is brought into contact with the paint scraping member 4 and is oscillated at an appropriate range of oscillation angles and / or oscillation speeds around the longitudinal axis 96 of the holder portion 92 of the paint scraping member 95 to partially scrape off the undried paint 41, thereby forming continuous linear and / or discontinuous linear and / or point-like protrusions 4' made of the second paint material 41 in a patterned manner on the surface 6 of the substrate portion 1 to be painted. In performing this paint scraping operation, at least the oscillation angle and / or oscillation speed around the longitudinal axis 96 of the holder portion 92 of the paint scraping member 95 is automatically and randomly changed in response to random signal information generated from an electrical or mechanical random signal information generating means, in conjunction with the movement speed of the substrate portion 1 in the transport direction.

[0053] Herein, the paint scraping pattern 94 used in the present invention will be described. As shown in Figure 9, the paint scraping pattern 94 is formed on one surface of a main body made of a suitable material, with grooves 5 having a suitable width and height and a suitable cross-sectional shape arranged in a pattern-like shape as illustrated in Figure 10. As described above, the pattern is formed on the surface 3 of the first coating layer 2 made of the first paint material 3, and while the second coating material 41 is still wet, the pattern scrapes at least a portion of the second coating material 4 into the grooves, and arranges it on protruding body formations 4' that are formed in various patterns with a suitable shape and height. These predetermined pattern-forming grooves 5 are formed on the surface that directly contacts the second coating layer 4. The paint scraping pattern 94 is composed of wood, metal, synthetic resin, paper, etc. In particular, when it is composed of synthetic resin or its components, it is desirable to use a non-foaming synthetic resin with closed cells. In this invention, as shown in Figure 9, the second coating material 41 is removed from part or all of the surface 3 of the first coating layer 2 composed of the first paint material 3, and absorbed and held in the pattern-forming groove 5 to form appropriate patterned protrusions 4'.

[0054] The pattern shape of the paint scraping pattern 94 according to the present invention is not specified, but rather the pattern-forming groove portion 5 is formed in a pattern shape as illustrated in Figure 10. In the present invention, it is possible to select and use any pattern from among the multiple types of paint scraping patterns 94. The depth of the pattern-forming groove 5 of the paint scraping pattern 94 in the present invention is not particularly specified, but it is desirable that it has a depth that corresponds to the desired height of the second coating layer 4. In the present invention, the height of the projection of the second coating layer 4 from the surface 3 of the first coating layer 2 is preferably 0.003 mm to 0.03 mm, more preferably 0.005 mm to 0.02 mm, and while the height of the second coating layer 4 may be uniform, it is also desirable that it be randomly non-uniform. The height will also vary depending on the viscosity of the second coating material 41 used.

[0055] Next, a specific example of the paint scraping operation using the paint scraping pattern 94 in the present invention will be described. As shown in Figures 2 and 8, a paint scraping member 95 is formed by attaching one of the above-mentioned desired group of multiple paint scraping patterns 94 to the curved surface 93 of a holding body 92 having a desired curved surface 93. The paint scraping member 95 is held so as to be able to reciprocate and pivot in any direction within any angular range and / or at any oscillation speed around the longitudinal central axis 96 of the paint scraping member 95, while the groove 5 is being held. While pressing the pattern surface 94 onto the second paint film layer 4, which is in an undried state, the base material 1 is brought into contact with the surface 3 of the first painted film layer 2, which is moving relatively along the transport direction of the drive belt 91. Then, the paint scraping member 95 is rotated at arbitrary time intervals and in arbitrary directions within arbitrary angular ranges and / or at arbitrary oscillation speeds, while the base material 1 is moved relatively along the transport direction of the drive belt 91.

[0056] This action scrapes off some or all of the undried second coating material 41 that was present on the surface 3 of the first coating layer 2, and absorbs it into the pattern-forming groove 5, thereby forming a protruding portion 4' of appropriate height. Meanwhile, the paint scraping member 95 is rotated and oscillated from side to side around the longitudinal axis 96 of the holding portion 92 of the paint scraping member 95 by an appropriate rotary drive device 97, at an arbitrary range of oscillation angles and / or an arbitrary oscillation speed and at arbitrary time intervals, thereby partially scraping off the undried paint. As a result, the protruding portions 4' of the second coating material 4, as shown in Figure 1, are formed in an irregular and uneven pattern.

[0057] Furthermore, the rotary drive device 97 is provided with a rotary drive device control means 98 for controlling the oscillating rotation state of the rotary drive device 97, and the rotary drive device control means 98 is provided with an appropriate rotary drive device control information storage means 981 for storing rotary drive device control information that sets the oscillating rotation state of the rotary drive device 97 to multiple arbitrary values ​​(rotation angle and / or rotation speed and / or rotation direction, etc.), or an automatic drive condition changing means 981' that can set the rotation state of the rotary drive device 97 steplessly and arbitrarily, and an external drive control signal (RA An external drive signal receiving means 99 for receiving a random drive signal may be provided, and when the external drive signal receiving means 99 receives a desired external drive signal (random drive signal), the external receiving means 99 may, if necessary, generate an appropriate internal random drive information signal in response to the reception, and in response to the internal random drive information signal, select desired drive control information from the rotary drive device control information storage means 981 or the drive condition changing means 981' to control the oscillating rotation drive state of the rotary drive device 97 (see Figures 3 and 8).

[0058] Furthermore, as another specific example in the present invention, while the paint scraping operation is being performed, the paint scraping member 95 can be randomly slid in any direction and for any distance and / or any range of speeds in any direction at an appropriate random timing along the central axis of the longitudinal axis 96 of the holding portion 92 of the paint scraping member 95, that is, in a direction perpendicular to the direction of movement of the base material portion 1. In this specific example, as shown in Figure 8, a central axis sliding drive device 950 is provided, which is connected to the longitudinal central axis 96 of the paint scraping member 95 and moves and slides the longitudinal central axis 96 along the central axis direction in any direction for any distance and / or at any speed. A central axis sliding drive device drive control means 951 is also provided to control the sliding state of the central axis sliding drive device 950.

[0059] Furthermore, the rotary drive device control means 951 may be provided with a suitable central axis movement drive device control information storage means 953 for storing central axis movement drive device control information that sets the movement sliding state of the central axis movement drive device 950 to a plurality of predetermined values ​​(sliding distance and / or sliding speed and / or sliding direction, etc.), or an automatic movement drive condition changing means 953' that can set the movement sliding state of the central axis movement drive device 950 steplessly and arbitrarily, as well as an external drive signal receiving means 952 for receiving external drive control signals (random drive signal information) from the outside, and when the external drive signal receiving means 952 receives desired external drive signal information (random drive signal), in response to the reception, the external receiving means 952 generates a suitable internal random drive signal, and in response to the internal random drive signal, selects desired drive control information from the central axis movement drive device control information storage means 953 or the drive condition changing means 953' to control the movement sliding drive state of the rotary drive device 950. (See Figure 8)

[0060] Alternatively, in this specific example of the present invention, as shown in Figure 8, a retaining member displacement drive device 103 is provided to slide the retaining member 92 of the paint scraping member 95 in the front-rear direction at any timing and speed over any distance in a direction parallel to the transport direction of the base material 1 (a direction perpendicular to the longitudinal central axis 96 of the retaining member 92), and the retaining member displacement drive device 103 is provided with a retaining member displacement drive device control means 104 for controlling the displacement sliding state of the retaining member displacement drive device 103 as it moves in the transport direction of the base material 1. Furthermore, the retaining member displacement drive device control means 104 may be provided with a suitable retaining member displacement drive device control information storage means 105 for storing retaining member displacement drive control information that sets the displacement drive state of the retaining member 95 to a plurality of arbitrary values ​​(sliding displacement distance and / or sliding displacement direction and / or sliding speed, etc.), or it may be provided with an automatic displacement drive condition changing means (e.g., a continuously variable transmission) 105' that can set the displacement sliding state of the retaining member displacement drive device 103 in a stepless manner, and an external drive signal receiving means 106 for receiving an external drive control signal (random drive signal) from the outside, and when the external drive signal receiving means 106 receives a desired external drive signal (random drive signal), in response to the reception, the external receiving means 106 generates a suitable internal random drive signal, and in response to the internal random drive signal, it selects desired drive control information from the retaining member displacement drive control information storage means 105 or the drive condition changing means 105' to control the displacement sliding drive state of the retaining member displacement drive device 103.

[0061] Furthermore, in this specific example, in the paint scraping step 90 described above, the base material 1 itself may be moved and slid over an appropriate distance range at an appropriate timing in a direction perpendicular to the direction of movement of the base material 1, in order to reproduce the wood grain pattern of natural wood, which is more complex and non-uniform. As a specific example, this could involve sliding the belt portion of the fourth drive means 91 that moves and transports the base material 1, that is, the entire fourth drive means 91, from side to side at any timing, for any length of movement and / or at any speed, in a direction perpendicular to the direction of movement of the transport means 91. Alternatively, the base material 1 mounted on the fourth drive means 91 could be slid from side to side in a direction perpendicular to the driving direction of the fourth drive means 91 using an appropriate jig 840 or the like to change the position of the base material 1 on the drive belt. In the former case, as shown in the second paint application process 90 in Figure 2, a drive unit displacement device unit 930 is provided to slide the entire fourth transport mechanism 91 itself in a direction perpendicular to the transport direction of the substrate unit 1, and the transport unit displacement device unit 930 is configured to move left and right by a length at any timing and at any distance and / or at any speed using a transport unit displacement device drive mechanism 931 which is composed of an appropriate drive mechanism, such as a motor.

[0062] Furthermore, the transport section displacement device drive mechanism 931 may be provided with a transport section displacement device drive mechanism control unit 932, and a suitable storage means 933 for storing control information relating to preferred specific examples of the movement direction and / or movement distance and / or movement speed of the transport section displacement device 930 may be provided therein, or a control mechanism 933' that can randomly select any such movement conditions may be provided. (See Figures 2 and 3) Furthermore, the transport section displacement device drive mechanism control unit 932 is provided with a drive signal receiving means 934 for receiving appropriate drive signal information from an external source (for example, a random drive signal, etc.) to arbitrarily select and determine the direction of movement of the transport section displacement device 930 and / or its movement distance and / or movement speed, and for moving the position of the transport section displacement device 930.

[0063] On the other hand, as a specific example of the latter, a mechanism similar to that described in the other specific examples above, as shown in Figure 6, is configured such that a pair of guide members 940 having an appropriate shape are brought into contact with the left and right sides of the base material 1, which is mounted on the fourth transport means 91 and in motion, and the guide members 940 are moved by a guide member sliding drive device 941' which slides the guide members 940 in a direction perpendicular to the direction of movement of the drive device 91 at an arbitrary speed and / or within an arbitrary range of movement distances. The guide member sliding drive device 941' is provided with a guide member sliding drive control unit 942, and may also be provided with an appropriate storage means 943 for storing control information relating to preferred specific examples of the direction of movement of the guide members 940 and / or an arbitrary distance and / or an arbitrary speed of movement, or it may be provided with a control mechanism 943' that can randomly select any such movement conditions by a stepless change mechanism. Furthermore, the guide member sliding drive control unit 942 is provided with an external drive signal information receiving means 944 for receiving appropriate drive signal information from an external source (for example, a random drive signal, etc.) to select and determine the direction of movement of the guide member 940 and / or the distance and / or speed of movement, and for moving or displacing the position of the guide member 940.

[0064] Furthermore, in the present invention, it is desirable to provide all or some of the above-mentioned drive devices in the paint scraping device 900 of the paint scraping process 90 with a drive device control unit that controls the driving operation of each drive device, as illustrated in Figure 3, and to provide the drive device control unit with an external drive signal receiving means that receives an appropriate external drive control signal (for example, a random drive control signal) and drives the drive device control unit under predetermined conditions, and to configure the drive device control unit to either select one of the conditions from a drive condition storage means that stores a plurality of drive control conditions for driving the drive device in advance in response to the internal random drive signal, or to select a drive condition selection means that can automatically select and set an appropriate drive condition in response to the internal random drive signal, and to drive and control the drive device.

[0065] Furthermore, in this specific example of the present invention, as shown in Figure 13, the paint scraping member 95 is composed of a cylindrical body 300 having a rotational axis, and multiple types of mutually different groove patterns 94 are arranged adjacent to each other on the outer surface of the cylindrical body, and the paint scraping member 95 is incorporated into the painting apparatus shown in Figure 8 as a component similar to the paint scraping member 95 described above, and in response to an arbitrary random drive signal from the outside, the cylindrical body 300 is rotated in an arbitrary direction to arbitrarily and randomly select a predetermined pattern from the multiple patterns and perform a paint scraping operation. In other words, in the present invention, it is desirable that some or all of the main drive devices in the paint scraping device 900 be configured to operate arbitrarily and randomly, and to be driven individually and randomly, in response to random drive signals input from an external source. Specifically, in cases where multiple types of paint scraping patterns 94 are attached to the curved surface 93 of the holding portion 92 of the paint scraping member 95 in a manner that allows for arbitrary selection, it is desirable to provide a pattern selection means for selecting one desired scraping pattern 94 from the group of multiple paint scraping patterns 94, and a pattern selection means control means for controlling the pattern selection operation of the pattern selection means. Furthermore, it is desirable to configure the pattern selection means control means to be driven in response to random signal information generated from a separately provided electrical or mechanical random signal information generating means, thereby randomly selecting one scraping pattern from the multiple types of scraping patterns.

[0066] Another specific example in the third aspect of the present invention is, in particular in the third step 80 and / or the fourth step 90, the transport means 81, 91 are provided with a transport means position changing mechanism 831, 931 for moving the transport means 81, 91 itself in a direction perpendicular to the transport direction of the transport means 81, 91 and a transport means position changing mechanism control unit 832, 932 for controlling the drive of the transport means position changing mechanism 831, 931, or, as shown in Figure 6, the transport means are provided with a transport means that contacts the substrate portion 1 moving on the transport means and moves the substrate portion 1 on the transport means 81, 91 A preferred specific example is to provide substrate sliding means 840, 940 for sliding in a direction perpendicular to the substrate transport direction at stages 81, 91, and a substrate sliding means drive mechanism control unit 842, 942 connected to the drive mechanisms 841, 941 of the substrate sliding means 840, 940, and to configure the transport means position change mechanism control unit 832, 932 or the substrate sliding means drive mechanism control unit 842, 942 to be controlled in response to random signal information generated from a separately provided random signal information generation means, thereby automatically and randomly displacing the substrate part 1 in a direction perpendicular to the substrate transport direction.

[0067] In this specific example of the present invention, as the final step, the substrate portion 1, which is composed of the second paint film layer 4 made of the undried second coating material 41 that has been removed from the fourth step, the paint scraping step 90, and which has formed an appropriate uneven and random pattern, is transported to the baking and drying step 200 by an appropriate transport means 201, and is subjected to a baking and drying process using an appropriately provided drying means (not shown).

[0068] On the other hand, another specific example in the third aspect of the present invention described above is a painting apparatus 2000, as shown in Figure 2, which moves a substrate to be painted 1 and performs a desired painting process on at least a portion of the surface portion 7 of the substrate to be painted 1, wherein the painting apparatus 2000 comprises a transport mechanism 61 which constitutes a transport process 60 having the function of transporting the substrate to be painted 1 into the painting process and sequentially passing it through each of the processing processes described later, and a coating process applied to the surface portion 7 of the substrate to be painted 1 that has been transported via the transport mechanism 61 and is in continuous movement. A first coating section 70 forms a first coating layer 2 having a uniform thickness by applying a coating material consisting of a first synthetic resin composition 31,72, which is composed of a synthetic resin component, a wood powder component, and a cellulose nanofiber (CNF) component, wherein the wood powder component is uniformly dispersed within the synthetic resin composition, using a first coating device 705. The first coating section 70 forms the first coating layer 2 of the substrate 1 to be coated, which is transported via the transport mechanism and is in continuous movement, on its surface 7. A second coating treatment unit 80 applies a second synthetic resin composition 41, which is the same as or different from the first synthetic resin composition for forming the first coating layer 2, but differs from the first synthetic resin composition in viscosity and / or hue, lightness, and chroma, to the surface 6 of the coating layer using a second coating device 800 to form a second coating layer 4 consisting of a film, line, or dots of a desired height, and the second coating treatment unit 80 applies a second synthetic resin composition 4, which is the same as or different from the first synthetic resin composition for forming the first coating layer 2, but differs in viscosity and / or hue, lightness, and chroma of the first synthetic resin composition treatment unit 800 to form a second coating layer 4 consisting of a film, line, or dots of a desired height, and the second coating layer 4 is transported via the transport mechanism and is in continuous movement, forming The pattern surface 941 of a paint scraping member 95, which is formed by attaching a desired paint scraping pattern 94 to the curved surface 93 of a cylindrical or semicircular cross-section of a separately arranged cylindrical body, is brought into contact with the surface of the second coating layer 4 so as to reach near the bottom surface of the second coating layer 4, and the paint scraping member 95 is swung within an appropriate range about the longitudinal axis 96 of the paint scraping member 95 to partially scrape the second coating layer 4, creating a pattern 50 with continuous, intermittent, or point-like protrusions 4' of a predetermined height.The apparatus 2000 comprises a paint scraping section 90 that forms a paint pattern on 51, and a baking and drying section 100 that dries the substrate 1 to be painted, on which the protruding pattern portion 4' is formed, at a predetermined temperature.

[0069] Furthermore, in the present invention and the third aspect thereof, a desirable specific example is a manufacturing apparatus for a component having a wood-like painted surface that closely resembles natural wood, characterized in that a part or all of the main drive mechanisms in each of the transport mechanism 61, the first painting processing unit 70, the second painting processing unit 80, the paint scraping processing unit 90, and the baking and drying processing unit 100 are individually connected to mutually different random signal generators or random operation generating mechanisms, and are configured to be individually controlled according to random signals or random operation instructions individually generated from each of the random signal generators or random operation generating mechanisms. In the above specific example, it is desirable that each main drive mechanism is provided with an external random drive information signal receiving means for receiving external random drive information signals transmitted from an externally provided random drive signal information generating means, and that the drive information signals from the external random drive signal information generating means are received via wired or wireless means, and that the corresponding drive mechanisms are controlled in response to the received external random drive information signals.

[0070] Alternatively, a random drive information signal generator may be directly attached to each of the drive mechanisms, and each drive mechanism may be directly controlled in response to the dam drive information signal generated by the individual random drive information signal generator. In this specific example, the following are preferred as the drive mechanism and its driving conditions that need to be randomly controlled by the system described above. That is, for example, the driving conditions of the transport drive mechanism in each transport mechanism 61, 71, 81, 91, 201 of the substrate to be painted in a direction parallel to the direction of travel of the substrate to be painted 1, the driving conditions of the moving mechanism in the transport mechanism in a direction perpendicular to the direction of travel of the substrate to be painted, the position control of the substrate to be painted in the first coating device 700 in a direction perpendicular to the direction of travel of the substrate to be painted, and the color or viscosity of the first synthetic resin composition paint 31, 72 for film formation, etc. It is desirable that the drive control mechanism related to the condition control includes drive control conditions for the drive control mechanism related to the condition control, drive conditions for the movement mechanism of the second coating apparatus 800 in a direction perpendicular to the direction of travel of the coating substrate part 1, and drive control conditions for the drive control mechanism such as the discharge amount of the second film-forming synthetic resin composition paint or the selection conditions of the paint such as viscosity, hue, brightness, and saturation, and drive control mechanisms such as the position control mechanism, rotation angle and / or rotation speed control mechanism or paint scraping pattern 94 selection mechanism in the scraping apparatus 95.

[0071] As described above, in the present invention, it is possible to employ a single drive belt system that runs through all processes in a consistent manner. However, it is preferable to control and drive at least the second to fourth processes in a continuous and integrated manner. Furthermore, as described above, it is preferable to configure at least some of the drive mechanisms in each of the various drive mechanisms provided in each process to be driven and controlled by a drive device equipped with control means corresponding to the drive mechanism. The control means is provided with an external signal receiving means that receives drive signals from an external source and generates drive signals to drive and control the drive device. In some cases, all of the external signal receiving means are connected by wire or wireless to a separately provided random drive signal generating means, so that the drive mechanisms are driven randomly in response to appropriate and random drive signals from the external source.

[0072] Furthermore, it is also desirable that the external drive signal receiving means in each of the drive mechanisms be configured to generate another internal random drive signal within the external drive signal receiving means, as shown in Figure 3. Furthermore, in the present invention, as described above, it is also desirable that the drive control of each mechanism constituting the device 2000 in the present invention be configured such that, instead of using an externally provided random information generation means, an appropriate random information signal generation means is individually attached to each main drive unit in each mechanism, and the control means of each element drive unit is controlled in response to the random information signal. By adopting this configuration, at least some or all of the main drive mechanisms in each of the above processes are individually and randomly driven by mutually different random signals. As a result, these random drive operations are combined in a complex manner, so uniform patterns or patterns with identical designs do not substantially occur, and the natural and complex random patterns of natural wood are easily formed. Furthermore, in this invention, it becomes possible to mechanically manufacture a component having a wood-like painted surface that closely resembles natural wood, which is the objective of this invention, entirely automatically without any human intervention, thereby greatly contributing to improved productivity and cost reduction. Furthermore, the random drive operation signals used in this invention can be generated using known random signal generation means, and the generation method may be mechanical, electrical, or even AI technology.

[0073] Furthermore, another specific example in the third aspect of the present invention is a first coating material storage means 701 in the first coating processing unit 70 that is provided with an adjustment means for adjusting the viscosity and / or hue, lightness, and chroma of the first coating materials 31, 72, which are made of the first synthetic resin composition for film formation, to suit at least one desired condition, and a coating material supply amount control means 701 that sets a desired amount of the adjusted first coating materials 31, 72 to the coating material ejection means 705 of the first coating apparatus 700. A desirable specific example is to provide a coating material supply amount control means 709, supply the first coating materials 31, 72 to the coating material ejection means 705 via the coating material supply amount control means 709, and spray the first coating materials 31, 72 onto the surface portion 7 of the substrate portion 1 to be coated from one or more paint ejection means 706 of the coating material ejection means 705. Furthermore, in the second coating processing section 80, a coating material is provided that is the same as or different from the first film-forming synthetic resin composition 31, 72. The second coating material storage means 801 stores one or more second coating materials 41,82 that differ in at least one of their hue, lightness, and saturation, and the second coating material storage means 801 may or may not have a viscosity adjustment means 802 for adjusting the viscosity of the second coating materials 41,82 to a predetermined value, and one or more paint supply pipes 808 are connected to each of the second coating material storage means 801, and the second coating materials 41,82 are supplied to the coating material ejection means 8 of the second coating device 800 via the paint supply pipes 808. In supplying to 05, a coating material supply amount control means 809 is provided in the coating material supply pipe 808 to set a desired amount of coating material to supply, and the second coating materials 41, 82 are supplied to the coating material ejection means 805 via the coating material supply amount control means 809, and the second coating materials 41, 82 are ejected from one or more coating nozzles 806 of the coating material ejection means 805 onto the surface of the film layer 2 formed by the first coating materials 31, 72. This is a desirable specific example.

[0074] A further specific example in the third aspect of the present invention is to apply a suitable coating material to at least one surface 7 of a substrate 1 to be coated, and then, while moving the coated substrate 1 via a suitable transport means 91, bring the outer surface of one selected pattern 94 of a paint scraping member 95, which is formed by attaching one or more types of desired paint scraping patterns 94 to the curved surface 93 of a holder 92 having a desired curved surface 93, into contact with the undried surface of the coated paint of the coated substrate 1, and then use the paint scraping member 95 A device 900 that continuously performs the operation of partially scraping off undried paint by oscillating the holder portion 92 of the paint scraping member 95 within an appropriate range about its longitudinal axis 96, thereby forming continuous linear and / or discontinuous linear and / or point-like protrusions 4' made of the paint on the surface of the substrate portion 1 to be painted, wherein the device comprises at least a drive mechanism for changing the oscillating angle and / or oscillating speed, which drives the holder portion 92 of the paint scraping member 95 to oscillate at an appropriate oscillating angle and / or oscillating speed about its longitudinal axis 96. A conveying speed changing drive means 195 is provided to drive the conveying means 91 that moves the step 97 and the base material part 1 at an appropriate speed, and the swing angle / swing speed changing drive means 97 and the conveying speed changing drive means 195 are each provided with a swing angle / swing speed changing drive means control unit 98 that controls the swing angle / swing speed changing drive means 97 and a conveying speed changing drive means control unit 196 that controls the conveying speed changing drive means 195, and the swing angle / swing speed changing drive means 97 and the conveying speed changing drive means 91 are interconnected. The manufacturing apparatus 2000 for a component having a wood-like painted surface that approximates natural wood is configured to individually and automatically and randomly drive the oscillation angle / oscillation speed changing drive means control unit 98 and / or the transport speed changing drive means control unit 196 in response to random signal information generated from one or more random signal information generating means 200, which are provided separately, thereby driving the oscillation angle / oscillation speed changing drive means 97 and the transport speed changing drive means 195 individually and automatically and randomly.

[0075] On the other hand, in the present invention, the corresponding drive operation control unit that controls the operation of the drive device in each of the above-mentioned component mechanisms is configured such that an external signal receiving means connected to the drive operation control unit emits appropriate drive control information in response to random information signals from electrical signals received from the outside, or in some cases in response to random internal signals generated internally, thereby causing a predetermined drive device to perform a predetermined operation. Below, a specific example of a case in which the operation control of each desired drive device is randomly controlled and driven by mechanical random drive signal information generated based on a mechanical system will be described. Specifically, Figures 11 and 12 show a drive control device 2001 configured to randomly select and control the driving conditions of the drive mechanism for the oscillating and rotating motion of the holding member 92, which is provided on the scraping member 95 used in the paint scraping device 900 used in the fourth step, the paint scraping step 90, of the paint scraping device, using a mechanical random information generation means.

[0076] Specifically, in Figures 11 and 12, a suitable frame-like structure 940' is provided on a conveying mechanism 91, which consists of a conveyor belt or the like, that carries the base material 1 on its upper surface, so as to straddle the conveying mechanism 91. At both the left and right ends of the lower end portion 961 of the frame-like structure 940', a pair of first bearing portions 962 are provided, which rotatably hold both ends of the longitudinal central axis 96 provided on the holding member 92 that is provided on the scraping member 95. On the other hand, a first eccentric roller 964 is provided near the upper end portion 970 of the frame-like frame portion 940', via an appropriate second bearing portion 948, with its rotation axis 945 eccentrically positioned at an arbitrary distance from its true center P. The rotation axis 945 of the first eccentric roller 964 is connected to an appropriate drive mechanism (e.g., a rotary motor) 946 and is configured to rotate in any direction and at any rotational speed. Furthermore, the drive mechanism 946 is connected to an appropriate rotational drive control means 947, which is configured to change the rotational direction and / or rotational speed of the drive mechanism 946 at arbitrary and random timings.

[0077] On the other hand, in any space region between the second bearing portion 948 and the first bearing portion 962, a second eccentric roller 952 is rotatably mounted on a suitable bearing portion 950' provided on the protruding tip portion of a support beam member 949 that protrudes from a part of the frame-like frame body portion 940', with its rotation axis 951 eccentrically positioned at an arbitrary distance from its true center P. Furthermore, a swing lever portion 958 is provided, with one end portion 957 integrally fixed to one end portion of the longitudinal central axis 96 of the holding member 92 of the scraping device 95, and the other end portion 953 of the swing lever portion 958 is connected to its rotation axis 955 via a suitable third bearing portion 954. A third eccentric roller 956 is mounted eccentrically at an arbitrary distance from the center P and is rotatably attached. Furthermore, by connecting the first eccentric roller 964, the second eccentric roller 952, and the third eccentric roller 956 with a single annular drive belt 960 and performing a drive operation, the rotational motion of the drive mechanism 946 causes the first eccentric roller 964 to rotate unevenly, which is further amplified by the second eccentric roller 952, which is then transmitted to the third eccentric roller 956, further amplified by the uneven rotation of the third eccentric roller 956. As a result, the oscillating lever 958 can swing irregularly and randomly up and down around the longitudinal central axis 96. Furthermore, in this specific example, the planar shape of the first to third eccentric rollers 964, 952, and 956 is not necessarily a perfect circle, but may be an appropriate deformed shape, such as an ellipse, triangle, quadrilateral, or a deformed version thereof. Furthermore, in the above specific example, it goes without saying that the rotation speed of each of the rotating parts described above can be randomly changed in response to random signals transmitted from an appropriate random information generation means, as stated above.

[0078] Next, we will describe the configuration of yet another specific example according to the present invention. In other words, in this particular example, the substrate 1 to which the paint according to the present invention is applied has a surface shape that is not flat but curved with an appropriate curvature. For example, the base material 1 may be composed of a curved plate-like body, or it may be a solid cylindrical shape or a hollow cylindrical shape as shown in Figure 14 or Figure 15. Furthermore, the cylindrical body described above may have a perfectly circular cross-section or an elliptical cross-section. When applying the coating method according to the present invention to various substrate parts 1 having the curved surface described above, the desired substrate part 1 is basically carried through five steps, from the loading process 60 to the baking and drying process 100, as shown in Figure 2, by being mounted on an appropriate transport mechanism. In particular, as shown in Figure 15, if the contact part P between the substrate part 1 and the transport mechanism parts 71, 81, 91, etc. becomes unstable, for example, if the cross-sectional shape of the substrate part 1 is circular or elliptical, it is desirable to transport the substrate part with a substrate part holding jig 965 having an appropriate substrate part receiving part 966 interposed.

[0079] In the first paint application step 70 in this specific example, it is preferable to use a spray method for applying the first paint 31, 72 to the substrate part 1, and it is preferable to spray an appropriate amount of the first paint 31, 72 having an appropriate viscosity over the entire surface of the substrate part 1 to form a uniform film layer. Furthermore, in this specific example, since the surface of the base material 1 is curved, it is necessary to prevent the paint from flowing down from both ends of the base material 1. Therefore, it is desirable to set the viscosity of the first paint 31,72 higher than the viscosity in the basic specific example of the present invention described above. Subsequently, in the second paint application step 80 in this specific example, it is desirable to use a spray method for the application operation when applying the second paint 41,82 to the surface of the substrate 1 on which the dried first paint 31,72 film has been formed. It is desirable to spray an appropriate amount of the second paint 41,82 having an appropriate viscosity onto the entire surface of the substrate 1 on which the first paint 31,72 film has been formed, so as to form a uniform film layer of the second paint 41,82.

[0080] Next, in the paint scraping step 90 in this specific example, when bringing the paint scraping member 95 into contact with the film layer of the second paint 41,82 which is in an undried state, and partially scraping off the second paint 41,82 to form a desired wood grain pattern, it is preferable to use a paint scraping member 95' which is a drum-shaped cylindrical body formed by a curved surface having a radius of curvature that substantially matches the radius of curvature of the curved surface of the base material 1, as shown in Figures 14 and 15, unlike the paint scraping member 95 described above. In the present invention, the portion of the curved outer surface of the paint scraping member 95' that contacts the curved surface of the base material 1 is preferably made of the same material as the paint scraping member 95 in the above-described specific example. Furthermore, the curved outer surface of the paint scraping member 95' is provided with a plurality of grooves 5 formed in the same pattern as described in Figure 10, as shown in the above-described specific example of the present invention, as shown in Figures 14 and 15.

[0081] Furthermore, it is desirable that the paint scraping member 95', which is a drum-shaped cylindrical body, is configured to swing and rotate in the left-right direction at appropriate intervals and at appropriate speeds by an appropriate rotational drive mechanism 97' around a central axis 96'. In this specific example, by replacing the paint scraping member 95' of the paint scraping device 900 in the paint scraping process 90 shown in Figure 2 with the paint scraping member 95' described above, it is possible to randomly perform the paint scraping operation in the same operation and control method as in the above specific example. In other words, the direction of oscillation, oscillation angle, oscillation time, and oscillation speed of the paint scraping member 95' are configured to be arbitrarily and randomly selected and driven, as shown in the specific example above. In the specific examples shown in Figures 14 and 15, approximately half of the surface area of ​​the cylindrical base material 1 is subjected to painting and scraping treatments. The remaining half of the surface area can then be treated to create a painted pattern over the entire cylindrical body by inverting the base material 1, loading it onto the conveying device, and passing it through each of the above processing steps in sequence. The same operation can be performed even if the cross-sectional shape of the base material 1 is elliptical. Needless to say, if the cross-sectional shape of the base material 1 is a semi-cylindrical body or a curved flat plate, the painting operation can be completed in a single processing step. [Explanation of Symbols]

[0082] 1 Base material part 2. First coating layer 3. Surface portion of the first coating layer 4. Bulging portion of the second coating layer 4' projection 5 grooves 6. Part of the surface of the first coating layer 7 Surface of the base material 10 Synthetic resin composition 30 Member having a wood-like painted surface 31,72 First paint material 41,82 Second paint material 50, 51 Pattern section 60 Loading process 61, 71, 81, 91, 101 Conveying means 65, 75, 85, 195, 105 Conveyor drive device 66, 76, 86, 196, 106 Conveying means drive device control unit 67, 77, 87, 197, 107 External drive instruction signal receiving means 70. First paint application process 78 Internal random signal information generation means 79. Drive condition selection means 80. Second paint application process 90 Paint scraping process 92 Holding body part 93 Curved surface 94 Paint scraping patterns 95, 95' Paint scraping member 96 Longitudinal axis 97 Rotary drive device 98 Rotary drive device control means 99 External drive signal receiving means 100 Baking and drying process 103 Retaining member displacement drive device 104 Holding member displacement drive device control means 105 Holding member displacement drive device control information storage means 106 External drive signal receiving means 200 Random signal information generation means 300 Cylindrical body 701 Ink holding tank 702 Viscosity adjustment means 705 First paint material dispensing section 706 Paint injection nozzle section 707 Paint Injection Nozzle Control Unit 708 First paint material supply pipe section 709 First paint material supply control means 710 Paint flow rate adjustment valve drive control means 720 Drive signal receiving means 791 Memory means 791' Means for changing driving conditions 800 Second coating apparatus 801 Ink holding tank 802,802' Viscosity color condition adjustment means 805 Second paint material dispensing section 806 Paint injection nozzle section 807 Paint Injection Nozzle Control Unit 808 Second paint material supply pipe section 809 Flow control valve 811 Second paint material dispensing unit sliding drive means control unit 820 Valve drive unit 821 Valve drive device control unit 830 External drive signal information receiving means 831 Conveying means displacement drive unit 832 Conveying means displacement drive unit control unit 840,940 Pair of guide members 841 Guide Member Sliding Drive Device 842 Guide Member Sliding Drive Device Control Unit 844 Drive signal receiving means 831,931 Conveying means position change mechanism 832,932 Conveying means position change mechanism control unit 842,942 Substrate sliding means drive mechanism control unit 841,941' Drive mechanism 941 Patterned surface 900 Paint scraping device 930 Drive unit displacement device unit 931 Drive unit Displacement device drive mechanism 932 Drive Unit Displacement Device Unit Drive Mechanism Control Unit 933 Memory means 933' Control Mechanism 934 Drive signal receiving means 940' Frame-shaped frame section 941 Guide Member Sliding Drive Device 942 Guide Member Sliding Drive Device Control Unit 944 External drive signal information receiving means 970 Near the upper end 945 Rotating shaft 946 Drive Mechanism 947 Rotational drive control means 948 Bearing section 949 Support beam member 950 Bearing section 950 Central axis sliding movement drive device 951 Control means for central axis sliding movement drive device 952 External drive signal receiving means 952 Second eccentric roller 953 The other end 954 Bearing section 956 Third eccentric roller 957 End 958 Swivel lever section 960 Annular drive belt section 961 Lower end 962 Bearing section 964 First eccentric roller 965 Base material holding jig 966 Base material receiving part 2000 Painting treatment equipment 2001 Drive control device

Claims

1. A first coating layer is formed on the surface of a base material having an appropriate cross-sectional shape, comprising a synthetic resin composition composed of a synthetic resin component, a wood powder component, and a cellulose nanofiber (CNF) component, wherein the wood powder component is uniformly dispersed within the synthetic resin composition, and the first coating layer has a uniform thickness of 0.02 mm to 0.06 mm, preferably 0.03 mm to 0.05 mm, and the upper surface of the first coating layer is made of a first coating synthetic resin composition that is the same as or different from the first coating synthetic resin composition that constitutes the first coating layer, and the first coating layer A member having a wood-like painted surface that approximates natural wood, characterized in that a coating layer is made of a second film-forming synthetic resin composition having a viscosity and / or at least one of hue, lightness, and saturation different from that of the first synthetic resin composition, the coating layer has a uniform or non-uniform height of 0.003 mm to 0.03 mm, preferably 0.005 mm to 0.02 mm, from the upper surface of the first coating layer, and a pattern is formed which protrudes from the upper surface of the first coating layer in the form of points, or in the form of broken lines or continuous lines, and within a continuous range of 20 m arbitrarily measured along the longitudinal direction of the base material in the pattern, there are no repeating portions of the pattern at all.

2. After applying a suitable first coating material to at least one surface of the substrate to be painted, and preferably after drying, the painted substrate is moved via a suitable transport means, and a second coating material, which is the same as or different from the first coating material, is applied to the surface of the painted substrate. While the second coating material is still wet, the patterned surface of a paint scraping member, which has a desired paint scraping pattern attached to the curved surface of a holder having a desired curved surface, is brought into contact with the surface to which the second coating material has been applied, and the paint scraping member is swung within an appropriate range about the longitudinal axis of the holder of the paint scraping member. A method for manufacturing a member having a wood-like painted surface that approximates natural wood, characterized in that, when continuously and without human intervention, an operation is performed to partially scrape off the undried paint material while causing it to form continuous linear and / or intermittent linear and / or dot-like protrusions made of the second paint material on the surface of the substrate to be painted, the oscillation angle and / or oscillation speed of the paint scraping member about the longitudinal axis of the holder of the paint scraping member are automatically and randomly changed in response to random signal information generated from a separately provided random signal information generating means, while coordinating with the movement speed of the substrate of the conveying means.

3. A method for manufacturing a member having a wood-like painted surface approximating natural wood, as described in claim 2, characterized in that the longitudinal axis of the holder portion of the paint scraping member is automatically and randomly moved in a direction perpendicular to the direction of movement of the base material portion which is moved via the transport means, that is, along the longitudinal axis direction of the holder portion of the paint scraping member, in response to random signal information generated from the random signal information generating means.

4. A method for manufacturing a member having a wood-like painted surface that approximates natural wood, as described in claim 2, characterized in that the longitudinal axis of the holder portion of the paint scraping member is automatically and randomly moved in a direction parallel to the direction of movement of the base material portion which is moved via the transport means, in response to random signal information generated from the random signal information generating means.

5. A method for manufacturing a member having a wood-like painted surface that approximates natural wood, as described in claim 2, characterized in that the transport speed in the transport direction of the substrate in the transport means is automatically and randomly changed in response to random signal information generated from the random signal information generating means.

6. A method for manufacturing a member having a wood-like painted surface approximating natural wood, as described in claim 2, characterized in that the central axis of the conveying direction of the conveying base material in the conveying means is automatically and randomly displaced in a direction perpendicular to the central axis of the conveying direction of the base material (a direction parallel to the longitudinal axis of the holding part of the paint scraping member) in response to random signal information generated from the random signal information generating means.

7. A method for manufacturing a member having a wood-like painted surface that approximates natural wood, as described in claim 2, characterized in that the pattern attached to the outer surface of the holder portion of the paint scraping member, which is in direct contact with the paint-coated surface of the base material portion, is automatically and randomly selected from a group of multiple types of scraping patterns that are prepared separately in advance, in response to random signal information generated by the random signal information generating means.

8. A first step of transporting a substrate to be painted to a desired painting process via a desired transport means; a second step of applying a first coating material, consisting of a first film-forming synthetic resin composition, to the surface of the substrate while moving the substrate, and forming a first coating layer of uniform thickness on the surface of the substrate, consisting of the first coating material; and a second step of applying a first film-forming synthetic resin, which constitutes the first coating layer, to the surface of the first coating layer of the substrate while moving the substrate with the first coating layer formed on it. A third step of forming a second coating layer by applying a second coating material, which is a second synthetic resin composition for film formation that is the same as or different from the first coating material, and which differs from the first synthetic resin composition for film formation in at least one of the viscosity, hue, lightness, and chroma, using a second coating apparatus, so as to include all forms such as film-like, continuous linear, discontinuous linear, or dot-like, or at least at least one of these forms, to the substrate to be coated on which the first and second coating layers have been formed, and While the second coating layer is still wet, the substrate to be painted is moved via appropriate moving means, and the patterned surface of a paint scraping member, which has a desired paint scraping pattern attached to the curved surface of a holder having a desired curved surface, is brought into contact with the second coating layer, and the paint scraping member is swung at an arbitrary swing angle and / or swing speed about the longitudinal axis of the holder of the paint scraping member at an arbitrary swing angle, and / or swing speed, while at least partially scraping the second coating layer to form continuous linear bodies and / or intermittent linear bodies and / or dotted protrusions in a patterned manner. The process consists of a fourth step, a fifth step of drying the painted substrate portion on which the coating layer processed in the fourth step is formed at a predetermined temperature, and a sixth step of removing the dried painted substrate portion. Furthermore, in at least the second to fourth steps described above, the movement speed of the transport means is controlled by appropriate control means that are mechanically or electrically driven and controlled in coordination with each other. In at least the fourth step, the oscillation angle and / or oscillation speed about the longitudinal axis of the holding portion of the paint scraping member are controlled.A method for manufacturing a component having a wood-like painted surface that closely resembles natural wood, characterized by performing a scraping operation while automatically and randomly changing the scraping operation in response to random signal information generated from a separately provided random signal information generation means.

9. A method for manufacturing a member having a wood-like painted surface that approximates natural wood, as described in claim 2 or 8, wherein the first paint material applied to at least one surface of the substrate to be painted is a synthetic resin composition composed of a synthetic resin component, a wood powder component, and a cellulose nanofiber (CNF) component, and the wood powder component is uniformly dispersed within the synthetic resin composition.

10. A method for manufacturing a member having a wood-like painted surface approximating natural wood, as described in claim 2 or 8, characterized in that the second coating material is a synthetic resin composition for film formation that is the same as or different from the constituent components of the first coating material, and at least one of its viscosity, hue, lightness, and saturation is different from at least one of the viscosity, hue, lightness, and saturation of the first coating material.

11. A method for manufacturing a member having a wood-like painted surface approximating natural wood, as described in claim 8, characterized in that, in the second step, the viscosity and / or hue, lightness, and saturation of the first coating material, which is made of the first synthetic resin composition for film formation, are adjusted to conform to desired conditions, and then the first coating material is supplied to the coating material ejection means of the first coating apparatus via a coating material supply amount control means, thereby forming a first coating layer having a uniform thickness made of the first coating material on the surface of the substrate to be painted.

12. An apparatus for continuously performing the following operations: After applying an appropriate paint material to at least one surface of the substrate to be painted, the painted substrate is moved via an appropriate transport means, and a paint scraping member, which has a desired curved surface and one or more desired paint scraping patterns attached to the curved surface of the holder having a desired curved surface, is used to partially scrape off the undried paint on the surface of the painted substrate where the paint is applied, by bringing the outer surface of one of the selected patterns into contact with the surface of the paint scraping member, which has a desired curved surface, and while swinging the paint scraping member within an appropriate range about the longitudinal axis of the holder of the paint scraping member, the undried paint is partially scraped off, thereby forming continuous linear and / or discontinuous and / or point-like protrusions made of the paint on the surface of the substrate to be painted, the apparatus comprising at least a swing angle / swing speed changing drive means for swinging the holder of the paint scraping member at an appropriate swing angle and / or swing speed about its longitudinal axis, and the base A manufacturing apparatus for a component having a wood-like painted surface that closely resembles natural wood, characterized in that it is provided with a conveying means for moving the material at an appropriate speed, and the swing angle / swing speed changing driving means and the conveying speed changing driving means are each individually provided with a swing angle / swing speed changing driving means control unit for controlling the swing angle / swing speed changing driving means and a conveying speed changing driving means control unit for controlling the conveying speed changing driving means, and the swing angle / swing speed changing driving means and the conveying speed changing driving means are coordinated with each other, and the swing angle / swing speed changing driving means and the conveying speed changing driving means are individually controlled automatically and randomly in response to random signal information generated from one or more random signal information generation means separately provided, thereby individually controlling the swing angle / swing speed changing driving means and the conveying means driving means automatically and randomly.

13. In cases where multiple types of paint scraping patterns are attached to the curved surface of the holding portion of the paint scraping member in a manner that allows for arbitrary selection, the apparatus is provided with a pattern selection means for selecting a desired scraping pattern from the group of multiple paint scraping patterns and a pattern selection means control unit for controlling the pattern selection operation of the pattern selection means, and the pattern selection means control unit is configured to drive the pattern selection means in response to random signal information generated from a separately provided random signal information generating means, and to randomly select one scraping pattern from the multiple types of scraping patterns, as described in claim 12, for manufacturing a member having a wood-like painted surface that approximates natural wood.

14. A manufacturing apparatus for a member having a wood-like painted surface approximating natural wood, as described in claim 12, characterized in that it is provided with a means for moving the longitudinal axis of the holder portion of the paint scraping member along the longitudinal axis direction of the holder portion of the paint scraping member, and a control unit for the means for moving

15. A manufacturing apparatus for a member having a wood-like painted surface approximating natural wood, as described in claim 12, characterized in that the longitudinal axis of the holder portion of the paint scraping member is moved along a direction parallel to the direction of movement of the base material portion which is moved via the transport means, and the holder portion base material portion movement direction sliding drive means control unit connected to the holder portion base material portion movement direction sliding drive means controls the holder portion base material portion movement direction sliding drive means control unit in response to random signal information generated from a separately provided random signal information generation means, thereby automatically and randomly changing the longitudinal axis of the holder portion of the paint scraping member along a direction parallel to the direction of movement of the base material portion.

16. A manufacturing apparatus for a member having a wood-like painted surface approximating natural wood, as described in claim 12, characterized in that the conveying means is provided with a conveying means position changing mechanism for moving the conveying means itself in a direction perpendicular to the conveying direction of the base material and a conveying means position changing mechanism control unit for controlling the drive of the conveying means position changing mechanism, or a base material sliding means for contacting the base material moving on the conveying means and sliding the base material on the conveying means in a direction perpendicular to the conveying direction of the base material on the conveying means and a base material sliding means control unit connected to the base material sliding means, and the conveying means position changing mechanism control unit or the base material sliding means control unit in response to random signal information generated from a separately provided random signal information generation means, thereby automatically and randomly displacing the base material in a direction perpendicular to the conveying direction of the base material.

17. A coating apparatus that performs a desired coating process on at least a portion of the surface of a substrate to be coated while moving the substrate to be coated, the coating apparatus comprising a transport mechanism that constitutes a transport process having the function of transporting the substrate to be coated into the coating processing area and sequentially passing it through each processing area described later, and a synthetic resin composition composed of a synthetic resin component, a wood powder component, and a cellulose nanofiber (CNF) component, which is transported via the transport mechanism and applied to the surface of the substrate to be coated while it is in continuous movement, wherein the wood powder component is uniformly dispersed within the synthetic resin composition. A first coating processing unit that forms a first coating layer having a uniform thickness by applying a first coating material, which consists of a first coating-forming synthetic resin composition, using a first coating device, to the surface of the first coating layer of the substrate 1 to be coated, which is transported via the transport mechanism and is in continuous movement, and a first coating-forming synthetic resin composition, which is the same as or different from the first coating material that constitutes the first coating layer, is applied to the surface of the first coating layer of the substrate 1 to be coated, which is formed on the surface of the first coating layer of the substrate 1 to be coated, and the first coating-forming synthetic resin composition A second coating processing unit applies a second coating material, which is a second synthetic resin composition for film formation having at least one different hue, lightness, and saturation, using a second coating apparatus to form a second coating layer consisting of a film, line, or dots of a desired height. A paint scraping member is separately positioned on the surface of the undried second coating layer of the substrate to be painted, on which the second coating layer has been formed, while it is being transported via the transport mechanism and in continuous movement, and has a desired paint scraping pattern attached to the curved surface of a cylindrical or semicircular cross-section tube. The system comprises a paint scraping section that brings the surface of the paint scraping member into contact with the second coating layer 4 so as to reach the vicinity of the bottom surface of the second coating layer 4, and partially scrapes the second coating layer while oscillating the paint scraping member within an appropriate range about the longitudinal axis of the paint scraping member to form a pattern of continuous, intermittent, or point-like protrusions of a predetermined height, and a baking and drying section that dries the substrate to be painted, on which the protrusions have been formed, discharged from the paint scraping section, at a predetermined temperature, and the transport mechanism, the first painting section, the second painting section,A manufacturing apparatus for a component having a wood-like painted surface that closely resembles natural wood, characterized in that a part or all of the main drive mechanism in the paint scraping section and the baking and drying section are individually connected to mutually different random signal generators or random operation generators, and are configured to be individually controlled according to the random signals or random operation instructions individually generated from each of the random signal generators or random operation generators.

18. A paint scraping device that, after applying an appropriate paint material to the surface of an appropriate substrate portion during transport, brings a paint scraping member having a curved surface with an appropriate pattern onto the surface of the substrate portion while the paint material is still wet, and rotates the paint scraping member in any direction and at any rotational speed around its longitudinal central axis, wherein the central axis of the paint scraping member is connected to a pair of first bearings provided at the lower ends on both sides of an appropriate frame-like frame portion provided on a transport mechanism that transports the substrate portion, and the paint scraping member is connected to the central axis. The frame is locked in place so as to be able to rotate freely, and a first eccentric roller is provided near the upper end of the frame-like body, via a second bearing, whose axis of rotation is offset by an arbitrary distance from its true center, and the axis of rotation of the first eccentric roller is connected to an appropriate drive mechanism and is configured to rotate in any direction and at any rotational speed, and the drive mechanism is connected to an appropriate rotational drive control means, which rotates the drive mechanism randomly at arbitrary and random timings. The direction and / or rotational speed can be changed, and furthermore, a second eccentric roller is rotatably attached to the protruding tip portion of the support beam member, which is provided in an arbitrary spatial region between the first bearing portion and the second bearing portion, via a third bearing portion, the rotation axis of which is eccentrically positioned at an arbitrary distance from its true center, and a swing lever portion is provided on the lower part of the support beam member, with one end of the longitudinal central axis of the paint scraping member being directly fixed to the other end, and the swing lever portion The paint scraping member is configured to rotate integrally with the paint scraping member about its longitudinal central axis, and furthermore, a third eccentric roller is rotatably attached to the other end of the swinging lever portion via a fourth bearing portion, the third eccentric roller having its rotation axis eccentrically positioned at an arbitrary distance from its true center, and the first eccentric roller, the second eccentric roller and the third eccentric roller are connected by a single annular drive belt portion, and by simultaneously driving each of the eccentric rollers, the one end of the swinging lever portion is controlled.A paint scraping device characterized by being configured to oscillate irregularly and randomly around a central axis in the longitudinal direction.

Images