Method for producing coated substrate, printer, and printing plate

Abstract

To provide a method for producing a coated substrate which makes positional displacement in a transfer direction of a coated film applied to a coating protruding portion inconspicuous.SOLUTION: A producing method of a coated substrate 100 includes performing coating on a substrate 1, which has grooves 3 and projections 2, using a printing plate 25 in a relief printing method. Four sides of each of the projections 2 have a front side 4, a rear side 5, and lateral sides 6 that face each other. Directions of the front side 4 side relative to the rear side 5 of the projection 2 are the same. The projection 2 includes a coated projection 28 and a non-coated projection 29. The printing plate 25 has a relief section 26. The periphery of the relief section 26 includes a front end edge 261, a rear end edge 262, and lateral end edges 263. Among the front end edge 261 and the rear end edge 262, at least one adjacent to the non-coated projection 29 of the substrate 1 is not formed in a linear shape that is orthogonal to the direction of the front side 4 side relative to the rear side 5. The producing method includes sequentially coating the coated projection 28 by bringing the relief section 26 into contact with the coated projection 28 while conveying the substrate 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for producing a coated substrate, a printing apparatus, and a printing plate. More specifically, the present invention relates to a method for producing a coated substrate using a letterpress printing method, a printing apparatus suitable for the method, and a printing plate suitable for the method. [Background technology]

[0002] Patent Document 1 discloses a printing device that is a relief printing machine for forming a functional thin film on a substrate, the printing device comprising a cylindrical plate cylinder having at least a relief plate on the outer periphery on which a printing pattern is formed, an anilox roll for supplying ink to the relief plate, an ink supply device, and a positioning plate on which the substrate to which the ink of the relief plate is transferred is placed. The printing device is characterized by comprising a measurement input mechanism for inputting the measurement values ​​of the width direction position of each predetermined point of the printing pattern measured in advance and the flow direction position at that time, a correction control device for calculating the width direction deviation at each point based on the measurement values ​​and determining the width direction movement amount at each point so as to eliminate the deviation, and a correction mechanism for operating both or one of the cylindrical plate cylinder and the positioning plate based on the movement amount, and it is described that it has become clear that it is possible to improve the accuracy of the substrate by moving the plate cylinder or the moving plate in the width direction during printing operation based on the distortion of the substrate measured in advance. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5434434 Summary of the Invention [Problem to be solved by the invention]

[0004] Even if a substrate is coated using the printing device described in Patent Document 1, which is equipped with a correction control device and a correction mechanism for improving printing accuracy, slight deviations in the position of the substrate relative to the printing device may cause the coating position on the substrate to shift. Therefore, there is a demand for making the deviation in the coating position less noticeable even if the coating position on the substrate shifts.

[0005] The present invention has been made in consideration of the above-mentioned reasons, and aims to provide a method for producing a coated substrate, a printing apparatus, and a printing plate in which misalignment of the coating film applied to the coated convex portions in the transport direction is less noticeable. [Means for solving the problem]

[0006] The method for producing a coated substrate of the present invention includes using a printing plate to coat a substrate having grooves and a plurality of rectangular protrusions partitioned by the grooves by letterpress printing. The four sides of each of the protrusions include a front side and a rear side that face each other, and a pair of opposite lateral sides. The orientation of the front side of the protrusions relative to the rear side is the same in all cases. The protrusions include a coated protrusion and an uncoated protrusion. The printing plate has a relief portion for coating the coated protrusions. The periphery of the relief portion includes a front edge corresponding to the front side, a rear edge corresponding to the rear side, and a pair of lateral edges corresponding to the pair of lateral sides. At least the front edge and the rear edge adjacent to the uncoated protrusions of the substrate during coating have a non-orthogonal shape that is not formed in a straight line perpendicular to the orientation of the front side relative to the rear side. The manufacturing method includes conveying the substrate in a direction toward the front edge side relative to the rear edge of the convex portion while contacting the relief portion with the corresponding painted convex portion, thereby sequentially painting the painted convex portions along the conveying direction.

[0007] The printing device of the present invention is a printing device used for coating a substrate having grooves and a plurality of rectangular protrusions partitioned by the grooves, by a letterpress printing method. The substrate has four sides of each of the protrusions, each of which has an opposing front side and rear side, and a pair of opposing horizontal sides. The orientation of the front side relative to the rear side of the protrusions is the same in all cases. The protrusions include a painted protrusion and an unpainted protrusion. The printing device includes a conveyor that conveys the substrate in the orientation of the front side relative to the rear side of the protrusions, and a printing press that coats the substrate being conveyed by the conveyor. The printing press includes a printing plate, and the printing plate has a letterpress portion that contacts the painted protrusions to coat the painted protrusions. The periphery of the convex portion includes a front edge corresponding to the front edge, a rear edge corresponding to the rear edge, and a pair of horizontal edges corresponding to the pair of horizontal edges, and during painting, at least the front edge and the rear edge adjacent to the unpainted convex portion of the substrate have a non-orthogonal shape that is not formed in a straight line perpendicular to the orientation of the front edge relative to the rear edge.

[0008] The printing plate of the present invention is a printing plate used when painting a substrate having grooves and a plurality of rectangular protrusions partitioned by the grooves by a letterpress printing method. The four sides of each of the protrusions include a front side and a rear side that face each other, and a pair of horizontal sides that face each other. The orientation of the front side side of the protrusions relative to the rear side is the same in all cases. The protrusions include a painted protrusion that is painted by the printing plate and an unpainted protrusion that is not painted by the printing plate. The printing plate has a relief portion that paints the painted protrusions by contacting the painted protrusions. The periphery of the relief portion includes a front edge corresponding to the front side, a rear edge corresponding to the rear side, and a pair of horizontal edges corresponding to the pair of horizontal sides. At least the front edge and the rear edge adjacent to the unpainted protrusions of the substrate during painting have a non-orthogonal shape that is not formed in a straight line perpendicular to the orientation of the front side relative to the rear side. Effect of the Invention

[0009] According to the present invention, at least the front and rear edges of the relief portion of the printing plate adjacent to the unpainted convex portion of the substrate have a non-orthogonal shape that is not formed in a straight line perpendicular to the orientation of the front edge side relative to the rear edge, so that even if the position of the paint applied to the painted convex portion is shifted, the shift in position of the paint applied to the painted substrate in the transport direction is less noticeable. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram of one embodiment of a coated substrate produced by the method for producing a coated substrate of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of a coated substrate produced by a conventional method for producing a coated substrate. [Diagram 3] FIG. 3 is a schematic diagram of a coated substrate produced by a conventional method for producing a coated substrate. [Figure 4] FIG. 4 is a schematic diagram of a substrate used to create the coated substrate of FIG. 1, FIG. 2 or FIG. [Diagram 5] FIG. 5 is a schematic diagram of a printing apparatus used to prepare coated substrates of the present invention. [Figure 6] FIG. 6 is a schematic diagram of a printing plate of the present invention. [Figure 7] 7A to 7H are schematic diagrams of modified relief portions of the present invention. [Figure 8] FIG. 8 is a schematic diagram of a modified example of a coated substrate produced by the method for producing a coated substrate of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that each drawing is a schematic drawing, and the size of each component in the drawing does not necessarily reflect the actual size.

[0012] (overview) The method for producing a coated substrate 100 of the present invention includes coating a substrate 1 having grooves 3 and a plurality of rectangular protrusions 2 defined by the grooves 3 by a letterpress printing method using a printing plate 25. The four sides of each of the protrusions 2 include a front side 4 and a rear side 5 that face each other, and a pair of horizontal sides 6, 6 that face each other, and the orientation of the front side 4 side of the protrusion 2 relative to the rear side 5 is the same in all cases. The protrusions 2 include a coated protrusion 28 and an uncoated protrusion 29. The printing plate 25 has a relief portion 26 for coating the coated protrusions 28. The periphery of the relief portion 26 includes a front edge 261 corresponding to the front side 4, a rear edge 262 corresponding to the rear side 5, and a pair of horizontal edges 263, 263 corresponding to the pair of horizontal sides 6, 6. During painting, at least the leading edge 261 and the trailing edge 262 adjacent to the unpainted protruding portion 29 of the substrate 1 have a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the leading edge 4 side relative to the trailing edge 5. The above manufacturing method includes sequentially painting the painted protruding portions 28 along the conveying direction 111 by bringing the relief portion 26 into contact with the corresponding painted protruding portions 28 while conveying the substrate 1 in the direction of the leading edge 4 side relative to the trailing edge 5 of the protruding portion 2. This makes it possible to make the positional deviation of the coating film 8 applied to the painted protruding portions 28 in the conveying direction 111 less noticeable. The positional deviation of the coating film 8 applied to the painted protruding portions 28 in the conveying direction 111 means the shortest distance from the leading edge 4 to the coating film 8 in the conveying direction 111 when the coating film 8 does not overlap the leading edge 4, and means the shortest distance from the trailing edge 5 to the coating film 8 in the conveying direction 111 when the coating film 8 does not overlap the trailing edge 5.

[0013] (substrate) The substrate 1 according to the present invention has a groove 3 and a plurality of rectangular protrusions 2 defined by the groove 3 (see FIG. 4). In describing the substrate 1, the direction along the direction of the front side 4 relative to the rear side 5 is defined as the front-rear direction, the direction of the front side 4 relative to the rear side 5 is defined as the forward direction, and the direction of the rear side 5 relative to the front side 4 is defined as the backward direction.

[0014] In the substrate 1, the grooves 3 and the protrusions 2 are formed on one surface (hereinafter also referred to as the decorative surface 9) of the substrate 1. A plurality of rows each consisting of a plurality of protrusions 2 aligned in the front-rear direction are aligned in a direction perpendicular to the front-rear direction, and therefore each protrusion 2 is adjacent to another protrusion 2 in the front-rear direction via a groove 3. Specifically, an example of the substrate 1 has a plurality of protrusions 2 arranged in an array to give it a brick, tile or stone masonry design.

[0015] The substrate 1 may be made of inorganic substrates such as slate boards, wood-chip cement boards, pulp cement boards, lightweight aggregate-mixed cement boards, foamed concrete boards, glass fiber reinforced cement boards, calcium silicate boards, magnesium carbonate boards, or other hydraulic boards, which are used for exterior wall materials or interior materials, or may be made of various metal plates such as cold-rolled steel plates, stainless steel plates, aluminum plates, copper plates, and plated steel plates plated with zinc, zinc alloys, aluminum, chromium, nickel, or alloys thereof. By forming grooves 3 on the decorative surface 9 of the above-mentioned materials by embossing or cutting the grooves, the substrate 1 having the grooves 3 and the protrusions 2 partitioned by the grooves 3 can be manufactured.

[0016] A paint having the finish color of the groove portion 3 is applied to the entire surface of the substrate 1 as described above by spraying or the like, and after drying, a paint having one of the finish colors of the protrusions 2 is used to paint only the protrusions 2 by a roll coater, inkjet printer or the like, so that the groove portion 3 and the protrusions 2 have different color tones.

[0017] Furthermore, the protruding portion 2 includes painted protruding portions 28 that are to be painted by the printing plate 25, and unpainted protruding portions 29 that are not to be painted by the printing plate 25. The number of painted protruding portions 28 and the number of unpainted protruding portions 29 on the substrate 1 can be appropriately selected according to the mode of painting. The painted protruding portions 28 and the unpainted protruding portions 29 may be marked so that they can be distinguished visually. Note that the painted protruding portions 28 and the unpainted protruding portions 29 do not necessarily need to be distinguished visually before the substrate 1 is painted.

[0018] Although there is no particular limitation on the size or type of the substrate 1, a substrate 1 in which the line width of the groove 3 is about 3 to 15 mm, the length of the horizontal side 6 of the convex portion 2 is about 100 to 1000 mm, and the lengths of the front side 4 and rear side 5 of the convex portion 2 are about 50 to 500 mm is preferably used, and in this embodiment, a substrate 1 having a size within the above range is used. In this case, the thickness of the substrate 1 is about 12 to 50 mm, the width is about 300 to 1000 mm, and the length is about 2500 to 4000 mm.

[0019] (Printing device) The method for producing the coated substrate 100 of the present invention is carried out using a printing device 7 including a conveyor 10 for conveying the substrate 1 and a printer 20 for applying coating to the coating convex portions 28 (see FIG. 5). The printing device 7 also includes a control device (not shown) that can control the operation of the conveyor 10 and the printer 20. The control device is specifically a computer or the like.

[0020] <Conveyor> The printing device 7 includes a conveyor 10 that conveys the substrate 1. The conveyor 10 holds the substrate 1 so that the decorative surface 9 of the substrate 1 faces upward so that the printer 20 can paint the substrate 1, and conveys the substrate 1 by moving it forward in the front-to-rear direction, thereby conveying the substrate 1 to the location where the printer 20 is located. Therefore, when the substrate 1 is conveyed by the conveyor 10, it can be said that the direction of the front side 4 side relative to the rear side 5 of the protrusion 2 becomes the conveying direction 111.

[0021] Specifically, the transport machine 10 includes a conveyor 11 that is composed of a plurality of roller conveyors (see FIG. 5). When transporting the substrate 1, the substrate 1 is placed on the conveyor 11. The conveyor 11 is driven by a drive motor. The rotation speed of the drive motor of the conveyor 11 is controlled by a control device.

[0022] <Printing machine> The printing device 7 includes a printing machine 20 for applying coating to the coating projections 28 of the substrate 1 transported by the transport machine 10. Specifically, the printing machine 20 includes a plate cylinder 22 around which a printing plate 25 is wound, and an anilox roll 21 that is in contact with the plate cylinder 22 around which the printing plate 25 is wound and rotates in synchronization with the plate cylinder 22 around which the printing plate 25 is wound. A sensor for measuring the rotation speed is provided on the rotation shaft of the plate cylinder 22 around which the printing plate 25 is wound. This makes it possible to detect the amount of rotation (angle) of the plate cylinder 22 around which the printing plate 25 is wound. The sensor may be of either a contact type or a non-contact type.

[0023] In the printing press 20, the anilox roll 21 and the plate cylinder 22 around which the printing plate 25 is wound are rotated by the rotational force of a drive motor transmitted by a power transmission device. The drive motor that drives the anilox roll 21 and the plate cylinder 22 around which the printing plate 25 is wound is driven by a drive motor (not shown) different from that for the conveyor 11. The rotational speeds of the drive motors for the anilox roll 21 and the plate cylinder 22 around which the printing plate 25 is wound are controlled by a control device.

[0024] A detector (not shown) capable of detecting the speed at which the substrate 1 placed on the conveyor 11 passes a predetermined position is installed on the conveyor 11. The detector may be of either a contact type or a non-contact type.

[0025] As described above, the printing device 7 is equipped with a control device, which controls the rotation speed of the drive motor that drives the conveyor 11 and the rotation speed of the drive motor that drives the anilox roll 21 and the plate cylinder 22 around which the printing plate 25 is wound, based on the detection results of the sensor and the detector. This makes it possible to control the rotation speed of the anilox roll 21 and the plate cylinder 22 around which the printing plate 25 is wound, depending on the speed of the conveyor 11. As a result, the printing plate 25 can be aligned and brought into contact with the substrate 1.

[0026] The printing machine 20 also includes a doctor chamber 23 that is provided so as to closely fit the surface of the anilox roll 21. The doctor chamber 23 includes a chamber. Paint is held inside the chamber, and the paint in the chamber is applied to the anilox roll 21 by rotating the anilox roll 21. The doctor chamber 23 also includes a doctor blade. The doctor blade removes excess paint that has been applied to the anilox roll 21. It is preferable that the color of the paint used is similar to that of the protrusions 2 of the substrate 1. In this case, the positional deviation of the coating film 8 in the transport direction 111 can be made less noticeable.

[0027] As described above, the printing press 20 is provided with the printing plate 25 wound around the cylindrical surface of the plate cylinder 22. The printing plate 25 is wound around the plate cylinder 22 while being subjected to tension. This is because if the printing plate 25 is installed in a slack state relative to the cylindrical surface of the plate cylinder 22, the coating position in the conveying direction 111 is likely to shift.

[0028] The printing plate 25 is a relief printing plate, and in this embodiment is a flexographic printing plate. The printing plate 25 is made of rubber such as silicone rubber, and the rubber hardness of the printing plate 25 is, for example, about 35° to 45°.

[0029] Printing plate 25 has relief portion 26. Relief portion 26 is a convex portion of printing plate 25, which is a relief plate; that is, it is a portion to which paint is supplied during coating and which adheres to the substrate by coming into contact with the substrate. Since printing plate 25 is made of rubber, relief portion 26 is also made of rubber. Relief portion 26 has minute projections and recesses. Therefore, relief portion 26 can be said to be an assembly of minute recesses and projections.

[0030] The relief portion 26 has a shape corresponding to the shape of the coating protrusions 28. The relief portion 26 has a front edge 261 and a rear edge 262 located on the opposite side. The relief portion 26 also has a pair of lateral edges 263, 263 between the front edge 261 and the rear edge 262. When the printing plate 25 is attached to the plate cylinder 22, the direction from the rear edge 262 to the front edge 261 of the relief portion 26 is along the circumferential direction of the plate cylinder 22. In other words, the plate cylinder 22 rotates so that the relief portion 26 moves along the circumference of the plate cylinder 22 in a direction from the rear edge 262 to the front edge 261. Therefore, the front edge 261 comes into contact with the coating protrusions 28 first when the coating protrusions 28 are coated. And the rear edge 262 leaves the coating protrusions 28 last when the coating protrusions 28 are coated. The rotation direction of the plate cylinder 22 is sometimes referred to as the front-rear direction of the relief portion 26. The lateral edges 263, 263 extend along the circumferential direction and are formed linearly.

[0031] By appropriately designing the shape of the relief portion 26, it is possible to make the positional deviation of the coating film 8 applied to the coating protrusions 28 in the transport direction 111 less noticeable. In this embodiment, the leading edge 261 and the trailing edge 262 are formed into an arc shape (see FIG. 6). In other words, at least one of the leading edge 261 and the trailing edge 262, which is adjacent to the unpainted protrusions 29 of the substrate 1 during painting, is an arc shape that is not formed in a straight line perpendicular to the direction of the front edge 4 relative to the rear edge 5. In this case, it is possible to make the positional deviation of the coating film 8 applied to the coating protrusions 28 in the transport direction 111 less noticeable.

[0032] The location of relief portion 26 on printing plate 25 is determined according to the position of coating relief portion 28 .

[0033] The dimensions of the relief portion 26 are determined according to the size of the painted protruding portion 28. For example, it is desirable to make the dimensions of the relief portion 26 slightly larger than the protruding portion 2. Specifically, it is desirable to set the difference between the maximum length of the relief portion 26 and the length of the painted protruding portion 28 to 0 mm or more and 20 mm or less. The maximum length of the relief portion 26 means the length when the distance between any one point on the front edge 261 and any one point on the rear edge 262 is maximum. The length of the painted protruding portion 28 means the length of the horizontal side 6. It is also desirable to set the difference between the width of the relief portion 26 and the width of the painted protruding portion 28 to 0 mm or more and 10 mm or less. The maximum width of the relief portion 26 is the distance between one horizontal edge 263 and the other horizontal edge 263. The maximum width of the painted protruding portion 28 is the distance between one horizontal side 6 and the other horizontal side 6, and is also the length of the front side 4 or the rear side 5. Furthermore, it is more preferable that the maximum length of the relief portion 26 is equal to or longer than the length of the protrusions 2, and shorter than the sum of the length of the protrusions 2 and the width of the grooves 3. In this case as well, it is possible to make the positional deviation of the coating film 8 in the transport direction 111 less noticeable. Note that the width of the grooves 3 is the line width, and means the distance between the rear side 5 of the front protrusion 2 and the front side 4 of the rear protrusion 2, between the front protrusion 2 and the rear protrusion 2 adjacent to each other in the transport direction 111.

[0034] Although the area of ​​the relief portion 26 is not particularly limited, it is preferable that it is equal to or larger than the area of ​​the corresponding coating relief portion 28. In this case, the positional deviation of the coating film 8 in the transport direction 111 can be made less noticeable.

[0035] (Printing operation) Next, a specific operation of the printing device 7 of the present invention will be described.

[0036] First, the anilox roll 21 is rotated in synchronization with the plate cylinder 22 around which the printing plate 25 is wound, thereby supplying the paint in the doctor chamber 23 to the anilox roll 21. Next, excess paint adhering to the anilox roll 21 is scraped off with a doctor blade. Then, the surface of the anilox roll 21 to which the paint has been adhering is brought into contact with the relief portion 26 of the printing plate 25. This allows the paint to be transferred to the printing plate 25.

[0037] Furthermore, substrate 1 is placed with decorative surface 9 facing upward on conveyor 11 driven in conveying direction 111, and substrate 1 is conveyed in the direction of front side 4 relative to rear side 5 of protrusion 2 (conveying direction 111).

[0038] Next, the substrate 1 is coated. In coating, a detector detects the timing and speed of the substrate 1 placed on the conveyor 11 when it passes a predetermined position, and a sensor detects the rotational speeds of the anilox roll 21 and the plate cylinder 22. Based on the results detected by the detector and the sensor, the rotational speed of the drive motor of the conveyor 11 and the rotational speed of the drive motors of the anilox roll 21 and the plate cylinder 22 are controlled. In this way, by controlling the speed of the conveyor 11 and the rotational speed of the plate cylinder 22 around which the printing plate 25 is wound, it is possible to reduce the deviation of the coating position in the conveying direction 111.

[0039] Next, the substrate 1 is brought close to the printing plate 25 wound around the plate cylinder 22. Then, the relief portion 26 to which the paint is applied is brought into contact with the painted protruding portion 28 of the substrate 1. In this manner, the painted protruding portion 28 is painted.

[0040] (Action and effect) The effects of the present invention will now be described.

[0041] Normally, it is desirable to paint the painted protruding portion 28 so that the front end edge 261 of the relief portion 26 overlaps with the front edge 4 of the painted protruding portion 28 (see FIG. 2). However, the forward movement of the substrate 1 in the transport direction 111 relative to the relief portion 26 may be delayed, in which case an unpainted portion may be produced near the rear edge 5 of the painted protruding portion 28. If the painting position in the transport direction 111 is shifted, the portion of the coating film 8 applied to the painted protruding portion 28 that protrudes from the painted protruding portion 28 in the transport direction 111 will overlap near the rear edge 5 of the adjacent protruding portion 2 (unpainted protruding portion 29) in the direction (transport direction 111) of the front edge 4 side of the rear edge 5 of the protruding portion 2. In this case, if the shape of the relief portion 26 is rectangular like the coating protrusions 28, the portion of the coating film 8 that protrudes from the coating protrusions 28 is likely to overlap the adjacent protrusions 2, and the boundary between the coating film 8 and the adjacent protrusions 2 is easy to grasp, so that the overlapping portion tends to be noticeable (see FIG. 3). In contrast, in the present invention, the shape of the front end edge 261 and the rear end edge 262 of the relief portion 26 is made to have a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the front side 4 side relative to the rear side 5, so that the portion of the coating film 8 that protrudes from the coating protrusions 28 is unlikely to overlap the adjacent protrusions 2, and a visual effect of gradually changing from the color of the coating film 8 to the color of the protrusions 2 can be imparted. Therefore, the positional deviation of the coating film 8 applied to the coating protrusions 28 in the conveying direction 111 can be made less noticeable (see FIG. 1).

[0042] (painted substrate) The coated substrate 100 of the present invention will now be described.

[0043] In this embodiment, for example, the coated substrate 100 is obtained by applying coating to a substrate 1 having a groove portion 3 (line width 8 mm) and a plurality of rectangular convex portions 2 (width 70 mm × length 300 mm) partitioned by the groove portion 3. In this case, the arc-shaped front end edge 261 and rear end edge 262 of the relief portion 26 (maximum width 80 mm × maximum length 308 mm) have a radius of curvature of about 30 to 50 mm (the entire front end edge 261 and rear end edge 262 may be arcs, or each of the four corners of the front end edge 261 and rear end edge 262 may be arcs). By doing so, the positional deviation of the coating film 8 applied to the painted convex portion 28 can be made even less noticeable.

[0044] In addition, it is preferable that the deviation of the coating film 8 in the transport direction 111 when the coating protrusions 28 are painted is small, and in this case, the effect of making the deviation of the position of the coating film 8 in the transport direction 111 less noticeable is enhanced. When painting the coating protrusions 28 of the substrate 1 used in this embodiment, it is preferable that the deviation of the coating film 8 formed on the coating protrusions 28 in the transport direction 111 is 15 mm or less with respect to the transport direction 111 of the substrate 1.

[0045] Furthermore, if the coating film 8 applied to the coating protrusions 28 is made to cover as much of the coating protrusions 28 as possible, the positional deviation of the coating film 8 in the transport direction 111 becomes less noticeable. Therefore, the coating film 8 is applied so that the area of ​​the region of the coating protrusions 28 that is overlapped by the coating film 8 is 95% or more of the entire coating protrusions 28.

[0046] In addition, it is preferable that the coating film 8 applied to the coating convex portion 28 does not protrude beyond the convex portion 2 as much as possible, and in this case, the effect of making the positional deviation of the coating film 8 in the conveying direction 111 less noticeable is enhanced. For example, the distance by which the coating film 8 protrudes from each of the horizontal sides 6, 6 that are neither the front side 4 nor the rear side 5 of the four sides of the convex portion 2 in the direction in which the front side 4 and the rear side 5 of the convex portion 2 extend is 5 mm or less, and the distance by which the coating film 8 protrudes from each of the front side 4 and the rear side 5 of the four sides of the convex portion 2 in the direction in which the horizontal side 6 extends is 15 mm or less.

[0047] [Variations] (Variation 1) In the above embodiment, the shape of the front edge 261 and the rear edge 262 of the relief portion 26 is an arc shape, but the shape is not limited thereto, and any shape is acceptable as long as the deviation of the coating film 8 applied to the coating protrusion 28 can be made less noticeable. In other words, it is preferable that at least one of the front edge 261 and the rear edge 262 has a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the front edge 4 relative to the rear edge 5, and in this case, the deviation of the position of the coating film 8 in the conveying direction 111 can also be made less noticeable. In addition, in explaining the modified example of the relief portion 26, the direction along the direction of the front edge 261 side relative to the rear edge 262 is defined as the front-rear direction, the area surrounded by the front edge 261, the rear edge 262, and the lateral edges 263, 263 is defined as the inside, and the opposite side is defined as the outside.

[0048] Possible shapes of the leading edge 261 and the trailing edge 262 other than the arc shape include, for example, a wavy line shape, a sawtooth shape, and the like (see FIGS. 7A and 7B).

[0049] The shapes of the front edge 261 and the rear edge 262 do not have to be formed in a straight line perpendicular to the direction of the front edge 4 relative to the rear edge 5, and the front edge 261 and the rear edge 262 may be formed in a straight line such that the angle between each of them and the lateral edge 263 is not a right angle (see Figures 7C and 7D).

[0050] The front edge 261 and the rear edge 262 may have a shape that is recessed toward the inside in the front-rear direction of the relief portion 26. In this case, the front edge 261 and the rear edge 262 may be a smooth curve (see FIG. 7E) or a broken line shape (see FIG. 7F).

[0051] The front edge 261 and the rear edge 262 may have a shape in which a part of them protrudes outward in the front-to-rear direction of the relief portion 26 (see FIG. 7G). The front edge 261 and the rear edge 262 may also have a shape in which they protrude in a mountain shape outward in the front-to-rear direction of the relief portion 26 (see FIG. 7H).

[0052] The leading edge 261 and the trailing edge 262 may be processed so as to cause a change in the amount of paint attached to the coating film 8, more specifically, so as to form the coating film 8 in which the amount of paint attached decreases toward both ends in the direction along the conveyance direction 111. By processing the leading edge 261 and the trailing edge 262 to cause such a change, it is possible to make the positional deviation in the conveyance direction 111 of the coating film 8 applied to the coating protrusions 28 less noticeable.

[0053] Further, to explain the processing of the leading edge 261 and the trailing edge 262 in more detail, for example, with respect to the fine unevenness in the relief portion 26, the ratio of concave portions near the leading edge 261 and the trailing edge 262 in the relief portion 26 is increased. In this way, a difference can be generated in the ratio of concave portions to the total of concave portions and convex portions between the vicinity of the leading edge 261 and the trailing edge 262 and other locations. This can reduce the amount of paint attached to the formed coating film 8 at the location in contact with the leading edge 261 and can also reduce the amount of paint attached to the location in contact with the trailing edge 262, thereby changing the amount of paint attached. The shape of the relief portion 26 may have a pattern or the like on the inside of the outline.

[0054] In the embodiment, a configuration has been described in which none of the adjacent protrusions 2, 2 in the direction toward the front side 4 relative to the rear side 5 of the protrusion are painted protrusions 28, 28 (see FIG. 1), but the adjacent protrusions 2, 2 may be painted protrusions 28, 28 (see FIG. 8). When the painted protrusions 28, 28 are adjacent in the front-to-rear direction in this manner, the corresponding relief portion 26 has a longer shape such that the lateral edge 263 corresponds to the total length of one lateral side 6 and the other lateral side 6 of the two adjacent protrusions 2, 2, compared to when one painted protrusion 28 is painted.

[0055] The present invention is not limited to the above-described embodiments, but all aspects included in the scope of the claims are applicable.

[0056] [Aspects] The present invention includes the following aspects.

[0057] The method for producing a coated substrate 100 according to the first embodiment includes coating a substrate 1 having a groove 3 and a plurality of rectangular protrusions 2 defined by the grooves 3, by letterpress printing using a printing plate 25. The four sides of each of the protrusions 2 include a front side 4 and a rear side 5 that face each other, and a pair of horizontal sides 6, 6 that face each other. The orientation of the front side 4 side of the protrusion 2 relative to the rear side 5 is the same in all cases. The protrusions 2 include a coated protrusion 28 and an uncoated protrusion 29. The printing plate 25 has a relief portion 26 for coating the coated protrusions 28. The periphery of the relief portion 26 includes a front end edge 261 corresponding to the front side 4, a rear end edge 262 corresponding to the rear side 5, and a pair of horizontal ends 263, 263 corresponding to the pair of horizontal sides 6, 6. During painting, at least the one of the front edge 261 and the rear edge 262 adjacent to the unpainted protruding portion 29 of the substrate 1 has a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the front edge 4 relative to the rear edge 5. The manufacturing method includes bringing the relief portion 26 into contact with the corresponding painted protruding portion 28 while transporting the substrate 1 in the direction of the front edge 4 relative to the rear edge 5 of the protruding portion 2, thereby sequentially painting the painted protruding portions 28 along the transport direction 111.

[0058] According to this embodiment, it is possible to provide a coated substrate 100 in which the positional deviation of the coating film 8 applied to the coating protrusions 28 in the transport direction 111 is less noticeable.

[0059] The method for producing a coated substrate 100 according to the second embodiment is the same as the method for producing a coated substrate 100 according to the first embodiment, in which the area of ​​the relief portion 26 is equal to or larger than the area of ​​the corresponding coated relief portion 28.

[0060] According to this embodiment, the positional deviation of the coating film 8 in the transport direction 111 can be made less noticeable.

[0061] In the manufacturing method of the coated substrate 100 in the third aspect, in the first or second aspect, the maximum length of the relief portion 26 along the conveying direction 111 is greater than or equal to the maximum length of the corresponding coating protrusion 28 in the direction toward the front edge 4 relative to the rear edge 5.

[0062] According to this embodiment, the positional deviation of the coating film 8 in the transport direction 111 can be made less noticeable.

[0063] In the fourth aspect, the manufacturing method for the coated substrate 100 is any one of the first to third aspects, in which the shape that is not formed in a straight line perpendicular to the direction of the front side 4 relative to the rear side 5 is an arc shape.

[0064] According to this embodiment, the positional deviation of the coating film 8 in the transport direction 111 can be made less noticeable.

[0065] The printing device 7 according to the fifth embodiment is a printing device 7 used for coating a substrate 1 having grooves 3 and a plurality of rectangular protrusions 2 partitioned by the grooves 3, by a letterpress printing method. The substrate 1 has four sides of each of the protrusions 2, a front side 4 and a rear side 5 facing each other, and a pair of horizontal sides 6, 6 facing each other. The orientation of the front side 4 side relative to the rear side 5 of the protrusions 2 is the same in all cases. The protrusions 2 include a coating protrusion 28 and a non-coating protrusion 29. The printing device 7 includes a conveyor 10 that conveys the substrate 1 in the direction of the front side 4 side relative to the rear side 5 of the protrusions 2, and a printing machine 20 that coats the substrate 1 being conveyed by the conveyor 10. The printing machine 20 includes a printing plate 25. The printing plate 25 has a letterpress section 26 that comes into contact with the coating protrusions 28 to coat the coating protrusions 28. The periphery of the convex portion 26 includes a front edge 261 corresponding to the front side 4, a rear edge 262 corresponding to the rear side 5, and a pair of horizontal edges 263, 263 corresponding to the pair of horizontal sides 6, 6. During painting, at least the front edge 261 and the rear edge 262 adjacent to the unpainted convex portion 29 of the substrate 1 have a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the front side 4 relative to the rear side 5.

[0066] The printing plate 25 according to the sixth embodiment is a printing plate 25 used when applying paint to a substrate 1 having a groove portion 3 and a plurality of rectangular protruding portions 2 partitioned by the groove portion 3, using a letterpress printing method. The four sides of each of the protruding portions 2 include a front side 4 and a rear side 5 that face each other, and a pair of horizontal sides 6, 6 that face each other. The orientation of the front side 4 side of the protruding portion 2 relative to the rear side 5 is the same in all cases. The protruding portion 2 includes a painted protruding portion 28 that is painted by the printing plate 25, and an unpainted protruding portion 29 that is not painted by the printing plate 25. The printing plate 25 has a relief portion 26 that paints the painted protruding portion 28 by contacting it. The periphery of the relief portion 26 includes a front end edge 261 that corresponds to the front side 4, a rear end edge 262 that corresponds to the rear side 5, and a pair of horizontal ends 263, 263 that correspond to the pair of horizontal sides 6, 6. During painting, at least the leading edge 261 and the trailing edge 262 adjacent to the unpainted convex portion 29 of the substrate 1 has a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the leading edge 4 relative to the trailing edge 5. [Explanation of symbols]

[0067] 1 Board 2 Convex 3 Groove 4 Front side 5 Back side 6 horizontal side 7 Printing device 8 Coating 9. Cosmetic Surface 10. Conveyor 20 Printing machine 25 Print Edition 26 Letterpress Department 28 Painted protruding part 29 Unpainted protruding parts 100 Painted substrate 261 Front edge 262 Rear edge 263 Side edge

Claims

1. A method for producing a coated substrate, the method comprising: using a printing plate to coat a substrate having grooves and a plurality of rectangular protrusions defined by the grooves by a letterpress printing method, The four sides of each of the protrusions include a front side and a rear side facing each other, and a pair of horizontal sides facing each other, and the orientations of the front sides relative to the rear sides of the protrusions are all the same, The protrusions include a coated protrusion and an uncoated protrusion, the printing plate has a relief portion for coating the coating protruding portion, a peripheral edge of the convex portion includes a front edge corresponding to the front side, a rear edge corresponding to the rear side, and a pair of horizontal edges corresponding to the pair of horizontal sides, and at least one of the front edge and the rear edge adjacent to the unpainted convex portion of the substrate during painting has a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the front edge relative to the rear side, The manufacturing method includes conveying the substrate in a direction of the front side of the protrusion relative to the rear side of the protrusion, while bringing the relief portion into contact with the corresponding protrusion to be painted, thereby sequentially painting the protrusions along a conveying direction. Method for producing coated substrates.

2. The area of ​​the projection portion is equal to or greater than the area of ​​the corresponding coating projection portion. A method for producing the coated substrate according to claim 1.

3. a maximum length of the projection portion along the conveying direction is equal to or greater than a maximum length of the corresponding coating projection portion in a direction of the front side relative to the rear side; A method for producing the coated substrate according to claim 1.

4. The shape that is not formed in a straight line perpendicular to the direction of the front side relative to the rear side is an arc shape. A method for producing the coated substrate according to claim 1.

5. A printing device used for applying paint to a substrate having a groove and a plurality of rectangular protrusions defined by the groove by a letterpress printing method, comprising: the substrate has four sides of each of the protrusions, each of which has a front side and a rear side facing each other, and a pair of horizontal sides facing each other, and the orientations of the front sides of the protrusions relative to the rear sides are all the same; The protrusions include a coated protrusion and an uncoated protrusion, the printing device includes a conveyor that conveys the substrate in a direction of the front side of the convex portion relative to the rear side, and a printer that paints the substrate being conveyed by the conveyor, the printing machine includes a printing plate, the printing plate having a relief portion that paints the coating protrusions by contacting the coating protrusions, the peripheral edge of the convex portion includes a front edge corresponding to the front side, a rear edge corresponding to the rear side, and a pair of horizontal edges corresponding to the pair of horizontal sides, and at least one of the front edge and the rear edge adjacent to the unpainted convex portion of the substrate during painting has a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the front edge relative to the rear side; Printing device.

6. A printing plate used in applying paint to a substrate having grooves and a plurality of rectangular protrusions defined by the grooves by a letterpress printing method, comprising: The four sides of each of the protrusions include a front side and a rear side facing each other, and a pair of horizontal sides facing each other, and the orientations of the front sides relative to the rear sides of the protrusions are all the same, the protruding portions include coated protruding portions that are coated by the printing plate and uncoated protruding portions that are not coated by the printing plate, the printing plate has a relief portion that contacts the coating protrusions to coat the coating protrusions, the peripheral edge of the convex portion includes a front edge corresponding to the front side, a rear edge corresponding to the rear side, and a pair of horizontal edges corresponding to the pair of horizontal sides, and at least one of the front edge and the rear edge adjacent to the unpainted convex portion of the substrate during painting has a non-orthogonal shape that is not formed in a straight line perpendicular to the direction of the front edge relative to the rear side; Print version.

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