JP2004209441A - Manufacturing apparatus of construction laminae - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing apparatus of construction laminae stabilizing scratching of a scratch roll and stably mass-producing multiple construction laminae presenting almost same design appearance. <P>SOLUTION: The manufacturing apparatus 5 of the construction laminae has the scratch roll 51, a backup roll 52, a pressing means 53, a scratching blade 54 and a doctor roll 55. A paint storage part 56 storing replenishing paint 60 for replenishing the paint for painting with the paint 40 in a recessed part between the scratch roll 51 and the doctor roll 55 is formed in the manufacturing apparatus 5. The apparatus 5 is composed to supply the replenishing paint 60 in the storage part 56 to a roll surface 510 of the the roll 51 according to the rotation of the rolls 51 and 55. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
【Technical field】
The present invention relates to a building board manufacturing apparatus for manufacturing a building board by scraping a part of a coating material applied on a design surface.
[0002]
[Prior art]
For example, in the case of building boards mass-produced to be applied to the exterior walls of buildings, in order to avoid a monotonous finish, the design of the design surface of the building boards and the method of painting this design surface have been devised. I have. For example, as shown in Patent Literature 1, efforts are being made so that the design surface has a three-dimensional appearance.
In this patent document 1, an architectural board having a three-dimensional appearance is formed by forming a concavo-convex pattern on the design surface of the architectural board and making the colors of the convex portions and the concave portions in the concavo-convex pattern different. ing.
[0003]
In Patent Document 1, a first paint layer is formed on the design surface of an original plate for a building board, a second paint is applied to this surface, and the second paint is applied to the convex portion before it is dried. Is scraped off to form a second paint layer. In this way, the first paint layer is exposed at the projections, and the change in color between the first paint layer and the second paint layer is formed on the building board.
Japanese Patent Application Laid-Open Publication No. H11-163873 discloses a building board in which a change in color tone is formed by scraping with a scraping roll in the same manner as in Patent Document 1.
[0004]
[Patent Document 1]
JP-A-10-317631
[Patent Document 2]
JP-A-11-310485
[0005]
[Problem to be solved]
However, in Patent Literature 1, the scraper has no special device other than scraping the second paint applied to the convex portion. Therefore, it is not possible to prevent the surface of the scraping device from drying, and the durability of the scraping device may be deteriorated.
[0006]
On the other hand, in Patent Document 2, the scraping roll is provided with a scraping blade for removing the paint scraped by the scraping roll from the surface of the scraping roll. The paint or water is stored in a concave portion formed between the scraping blade and the scraping roll. Therefore, the paint or water can be supplied to the scraping roll to prevent the surface of the scraping roll from drying.
[0007]
However, the above-mentioned scraping blade is mainly intended to remove the paint from the surface of the scraping roll, and the supply of the paint or water to the surface of the scraping roll varies. Therefore, especially in the case of building boards for mass production, there is a possibility that the manner in which the paint is scraped may change during repeated scraping. At this time, there is a possibility that the appearance of each manufactured building board will vary.
[0008]
The present invention has been made in view of such conventional problems, and can stabilize the scraping of a scraping roll, and can stably mass-produce a plurality of building boards having substantially the same design appearance. An object of the present invention is to provide a building board manufacturing apparatus.
[0009]
[Means for solving the problem]
The present invention relates to a scraping roll which comes into contact with a design surface of an original plate for a building board and scrapes a part of a coating material applied to the design surface;
A backup roll disposed opposite to the scraping roll, abutting against the back surface of the building plate original, and passing the building plate original through a gap between the scraping roll;
A scraping blade that contacts the roll surface of the scraping roll and removes the coating material scraped by the scraping roll from the roll surface;
A doctor roll that contacts the roll surface of the scraping roll and rotates together with the scraping roll;
Between the scraping roll and the doctor roll, there is formed a paint storage section for storing the makeup paint.
An apparatus for manufacturing a building board, characterized in that the makeup paint in the paint reservoir is supplied to the roll surface of the scraping roll with the rotation of the scraping roll and the doctor roll. (Claim 1).
[0010]
The building board manufacturing apparatus of the present invention has the above-mentioned scraping roll and the above-mentioned backup roll, passes the above-mentioned building board original sheet through the gap between these rolls, and makes the scraping roll apply the above-mentioned coating material to the scraping roll. A part is attached and scraped off. The manufacturing apparatus includes the scraping blade, and can remove the scraped coating material from the surface of the scraping roll.
Further, the manufacturing apparatus has the doctor roll, and forms a paint storage part for storing the supplement paint between the doctor roll and the scraping roll. Then, the manufacturing apparatus is configured to supply the make-up paint from the paint reservoir to the roll surface of the scraping roll.
[0011]
Therefore, when the scraping is performed by the scraping roll, the supplementary paint is supplied to the roll surface. Therefore, a part of the applied paint is removed by the scraping blade, and the supplementary paint can be supplied to the roll surface of the dry scraping roll. Therefore, drying of the roll surface can be prevented, and the durability of the scraping roll can be improved.
[0012]
Further, in the present invention, the supply of the makeup paint to the roll surface is performed using the doctor roll provided separately from the scraping blade. That is, the supply of the supplementary paint is performed from a paint reservoir formed between the doctor roll and the scraping roll. The supply of the supplementary paint is performed with the rotation of the doctor roll and the scraping roll.
Therefore, a predetermined amount of the supplementary paint can be stably supplied to the roll surface with the rotation of the doctor roll and the scraping roll.
[0013]
Further, the make-up paint supplied to the roll surface is also supplied to the design surface of the original plate for building boards passing through the gap between the scraping roll and the backup roll. Therefore, the predetermined amount of the supplementary paint is supplemented on the surface of the applied paint on the design surface of the building board original plate. Then, the application state of the application paint on the design surface is finely adjusted.
Therefore, even when the coating material is repeatedly scraped from a plurality of original plates for building boards in the manufacturing apparatus, there is almost no variation in how the coating material is scraped. Further, since the supplementary paint is supplemented to the design surface of the original plate for building board almost simultaneously with or immediately before the scraping is performed, the scraping of the scraping roll can be stabilized.
[0014]
Therefore, a plurality of building boards manufactured by scraping with the manufacturing apparatus of the present invention have almost no variation in the design appearance of each building board. Therefore, according to the manufacturing apparatus described above, a plurality of building boards having substantially the same design appearance can be stably mass-produced.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
A preferred embodiment of the present invention described above will be described.
In the present invention, examples of the building board include an inorganic building board for mass production. Examples of the inorganic building board include a ceramic building board.
In addition, the above-mentioned original plate for building board refers to the original state of a building board manufactured by scraping with the scraping roll.
[0016]
Further, the scraping roll has a sponge layer made of a sponge material, and a rubber layer made of a rubber material and disposed on the outer peripheral side of the sponge layer. It is preferable to have a pressing means for pressing in the direction of the scraping roll (claim 2).
[0017]
In this case, the scraping roll and the backup roll are constructed by adjusting the material of the sponge material forming the sponge layer, the material of the rubber material forming the rubber layer, and the pressing force by the pressing means. The pressure applied to the original plate can be easily set. Then, even if the thicknesses of a plurality of original plates for building boards carried into the gaps between these rolls vary, the scraping rolls stably abut on the respective original plates for building boards at substantially the same pressure. be able to.
[0018]
The sponge material refers to a material produced by foaming rubber, synthetic resin, or the like, and has a lower hardness and lower rebound resilience than the rubber material.
The rubber material refers to a material made of various rubbers, and has higher hardness and higher rebound resilience than the sponge material.
Further, as the pressing means, there is a pressing means configured by using a spring, or a pressing means such as a cylinder or a gas cushion which can reciprocate with a predetermined repulsive force.
[0019]
Further, it is preferable that the supplement paint is made of the same paint as the applied paint.
In this case, the applied paint removed from the roll surface by the scraping blade can be supplied to the paint reservoir and reused as the supplementary paint.
[0020]
【Example】
An embodiment according to the building board manufacturing apparatus of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the building board manufacturing apparatus 5 of this embodiment scrapes off a part of the coating material 40 applied to the design surface 201 by contacting the design surface 201 of the building board original plate 2. It has a roll 51 and a backup roll 52 disposed opposite to the scraping roll 51 and abutting against the back surface 202 of the original plate 2 for building boards. The manufacturing apparatus 5 is configured to allow the original plate 2 for building boards to pass through a gap 59 between the scraping roll 51 and the backup roll 52.
[0021]
In addition, the manufacturing apparatus 5 includes a scraping blade 54 that contacts the roll surface 510 of the scraping roll 51 and removes the coating material 40 scraped by the scraping roll 51 from the roll surface 510, and the scraping blade 54. It has a doctor roll 55 that contacts the roll surface 510 of the scraping roll 51 from which the coating material 40 has been removed by the removing blade 54 and rotates together with the scraping roll 51.
[0022]
Further, in the manufacturing apparatus 5, a paint storage section 56 for storing a supplement paint 60 for supplementing the coating with the coating paint 40 is formed in a concave portion between the scraping roll 51 and the doctor roll 55. ing. Then, with the rotation of the scraping roll 51 and the doctor roll 55, the manufacturing apparatus 5 removes the supplementary paint 60 in the paint storage unit 56 from the gap 591 between the scraping roll 51 and the doctor roll 55. Thus, it is configured to supply to the roll surface 510 of the scraping roll 51.
[0023]
The details are described below.
The building board 1 in this example is a ceramic building board 1 that can be mass-produced.
As shown in FIG. 2, the building board 1 manufactured in the present example has a lower paint layer 3 and a lower coating layer 3 on the design surface 201 of the building board original plate 2 having the uneven pattern 203 formed by forming the plurality of convex portions 21 and 22. The upper paint layer 4 is sequentially provided.
Then, as shown in FIG. 6, the manufacturing apparatus 5 of the present embodiment forms the lower paint layer 3 on the design surface 201 of the original plate 2 for building board, and then forms the upper paint layer 4 for forming the upper paint layer 4. Before the coating material 40 is applied and dried, a part of the coating material 40 is scraped off by the scraper roll 51, and the lower coating layer 3 is exposed on the design surface 201 as shown in FIG. It forms an exposed surface 101 and a covered surface 102 in which the surface of the lower paint layer 3 is covered by the upper paint layer 4.
[0024]
As shown in FIG. 1, the scraping roll 51 has a sponge layer 512 made of a sponge material, and a rubber layer 513 made of a rubber material and arranged on the outer peripheral side of the sponge layer 512. The backup roll 52 has a pressing means 53 for pressing the backup roll 52 in the direction of the scraping roll 51. With this configuration, the scraping roll 51 and the backup roll 52 swing or elastically deform, respectively, so that the gap 59 therebetween can be changed according to a change in the thickness of the building board original plate 2. I have. Further, these rolls 51 and 52 are configured to be able to abut against a plurality of original plates for building boards 2 having different thicknesses with substantially the same pressure.
[0025]
That is, as shown in FIG. 1, the scraping roll 51 can be elastically deformed by the sponge layer 512, and the backup roll 52 can swing in the direction facing the scraping roll 51 by the pressing means 53. Has become. Even if the sponge layer 512 and the pressing means 53 cause a thickness variation of several millimeters (for example, ± 1.5 mm) between the plurality of original plates 2 for building boards, the gap between the rolls 51 and 52 described above. By changing 59, each of the rolls 51 and 52 can abut on each of the original plates 2 for building boards with substantially the same pressure.
[0026]
The pressure applied by the scraping roll 51 and the backup roll 52 to the original plate 2 for building board depends on the material of the sponge material forming the sponge layer 512, the material of the rubber material forming the rubber layer 513, and the pressing means 53. It can be set by adjusting the pressing force and the like.
[0027]
The scraping roll 51 has an iron core 511 at the center of the sponge layer 512. In this embodiment, the sponge material of the sponge layer 512 is butyl sponge rubber. The rubber material of the rubber layer 513 is made of EPDM (ethylene propylene rubber) having a rubber hardness of about 50 degrees. The pressing means 53 of the backup roll 52 is a spring device 53 constituted by using an elastically deformable spring 531.
[0028]
The backup roll 52 is made of a rubber roll. Further, the manufacturing apparatus 5 abuts on the cleaning tank 57 for storing the cleaning liquid 571 for cleaning the backup roll 52 and the roll surface 520 of the backup roll 52, and transfers the cleaning liquid 571 after the above cleaning to the roll surface 520. And a cleaning blade 58 for further scraping off. Then, a part of the roll surface 520 of the backup roll 52 is in contact with the cleaning liquid 571, and the backup roll 52 comes into contact with the back surface 202 of the building board original plate 2 after the cleaning is performed.
Even if the paint or the like applied to the design surface 201 of the original plate for building boards 2 adheres to the backup roll 52 due to the cleaning of the backup roll 52, it is cleaned and stains on the roll surface 520 of the backup roll 52. Can be taken.
[0029]
In this example, the doctor roll 55 is disposed below the position where the scraping blade 54 is disposed on the scraping roll 51. The doctor roll 55 supplies the supplement paint 60 to the roll surface 510 after the removal of the paint 40 by the scraping blade 54. Further, the above-mentioned make-up paint 60 is supplied from the gap 591 between the scraping roll 51 and the doctor roll 55 to the roll surface 510 after the application paint 40 is removed.
[0030]
In addition, after the scraping roll 51 has scraped the coating material 40 from the design surface 201 of the original plate 2 for a building board, the scraping blade 54 rotates by 180 ° or more, and then scrapes the scraped coating material 40. It is removed from the roll surface 510 of the take-up roll 51. The doctor roll 55 is disposed on the side of the scraping roll 51, that is, at a position where the doctor roll 55 comes into contact when the scraping roll 51 rotates about 270 ° after the scraping has been performed.
[0031]
In this example, the above-mentioned filling paint 60 is the same as the paint used for the above-mentioned paint 40. Therefore, the applied paint 40 removed from the roll surface 510 by the scraping blade 54 can be supplied to the paint reservoir 56 and reused as the supplementary paint 60. For this reason, the removed coating material 40 is applied to the original plate 2 for building board before being scraped by the scraping roll 51, that is, in this example, an upper coating layer formation described later is performed. It can be reused as the coating material 40 used in the process.
[0032]
Hereinafter, a method of manufacturing the building board 1 having the exposed surface 101 and the covering surface 102 using the building board manufacturing apparatus 5 will be described.
In the method for manufacturing the building board 1, the following preparing step, lower paint layer forming step, upper paint layer forming step, and clear layer forming step are performed to manufacture the building board 1. The building board manufacturing apparatus 5 is used in the upper paint layer forming step.
[0033]
As shown in FIG. 3, in the above-described preparation step, the original plate 2 for a building board having an uneven pattern 203 formed on the design surface 201 and having a plurality of convex portions 21 and 22 is prepared.
The original plate 2 for a building board of this example is made by mixing a cementitious raw material (cement, silicic acid raw material, etc.) with a woody raw material (wood fiber, wood chips, etc.), an additive, water and the like to form a mixed raw material. It is a cement-based original plate 2 that is sprayed and formed (formed) on a forming plate of a mold.
[0034]
As shown in the figure, the plurality of convex portions 21 and 22 on the design surface 201 of the cement-based original plate 2 are composed of a flat convex portion 21 having a substantially flat surface 211 formed on a vertex 210 thereof, and a vertex portion thereof. 220 has a sharp convex portion 22 formed with a sharp end portion 221. Further, on the bottom surface 231 of the concave portion 23 formed between the convex portions 21 and 22, a fine concave portion 24 further depressed than the bottom surface 231 is formed.
[0035]
Next, as shown in FIG. 4, in the lower paint layer forming step, after the cement base plate 2 is heated, a second step for forming the lower paint layer 3 on the design surface 201 of the cement base plate 2 is performed. (1) The first paint 30 is applied, and the first paint 30 is dried. Then, the lower paint layer 3 is formed on the entire design surface 201 of the original cement-based plate 2, that is, on the entire convex portions 21 and 22 and the concave portions 23.
[0036]
Next, as shown in FIG. 1 and FIG. 5, in the upper paint layer forming step, the above-mentioned paint 40 as the second paint 40 is applied to the surface of the lower paint layer 3 of the cement-based original plate 2. Before the 40 is dried, the cement-based original plate 2 is carried into the gap 59 between the scraping roll 51 and the backup roll 52. At this time, the paint 60 is supplied to the roll surface 510 of the scraping roll 51 from the paint reservoir 56.
In addition, the first paint 30, the coating paint 40, and the makeup paint 60 were all water-based paints.
[0037]
As shown in FIGS. 1 and 5, the design surface 201 of the cement-based original plate 2 abuts against the roll surface 510 of the scraping roll 51 on which the supplementary paint 60 has been supplemented, and the back surface 202 of the cement-based original plate 2. Abuts against the roll surface 520 of the backup roll 52. At this time, on the design surface 201 of the cement-based original plate 2, the supplementary paint 60 is further supplemented on the surface of the applied paint 40 on which the above-mentioned application is performed.
[0038]
As shown in FIG. 6, immediately after the refilling of the replenishing paint 60, the roll surface 510 of the scraping roll 51 separates from the design surface 201 of the cement-based original plate 2 and a part of the coating paint 40. In addition, a part of the filling paint 60 adheres to the roll surface 510 and is scraped off. Specifically, the roll surface 510 of the scraping roll 51 is formed on the apex portions 210 and 220 of the plurality of convex portions 21 and 22 on the design surface 201 of the cement-based original plate 2 (the substantially flat surface 211 of the flat convex portion 21). And the sharp end 221) of the sharp protrusion 22 and the bottom surface 231 of any of the recesses 23. Then, the second paint 40 applied to the substantially flat surface 211 of the flat convex portion 21 and the second paint 40 applied to a part of the bottom surface 231 of the concave portion 23 are scraped off.
[0039]
In this manner, as shown in FIG. 2, the coating material 40 is scraped off the substantially flat surface 211 of the flat protrusion 21 and the bottom surface 231 of any of the recesses 23, and the lower coating layer 3 is formed. An exposed exposed surface 101 is formed. On the other hand, a coating surface 102 in which the surface of the lower paint layer 3 is covered by the upper paint layer 4 is formed on other portions of the design surface 201. Further, on the bottom surface 231 of the concave portion 23 on which the exposed surface 101 is formed, the covering surface 102 by the fine concave portion 24 is also formed.
Thereafter, the original cement-based plate 2 having the exposed surface 101 and the coated surface 102 formed thereon is dried.
[0040]
Next, although not shown, in the clear layer forming step, a clear paint for forming a clear paint layer is applied to the dried exposed surface 101 and the coated surface 102 and dried. Then, a clear paint layer for improving weather resistance and the like is formed on the outermost surface of the design surface 201 of the cement-based original plate 2.
Thus, it is possible to manufacture the building board 1 having a complicated design appearance having the exposed surface 101 and the covering surface 102 in each of the convex portions 21, 22 and the concave portion 23.
[0041]
In the upper paint layer forming step using the building board manufacturing apparatus 5, as shown in FIG. 1, when the scraping roll 51 scrapes, the supplement paint 60 is applied to the roll surface 510. Is supplied. Therefore, a part of the coating material 40 is removed by the scraping blade 54, and the supplementary coating material 60 can be supplied to the roll surface 510 of the scraping roll 51 in a dry state. Therefore, drying of the roll surface 510 can be prevented, and the durability of the scraping roll 51 can be improved.
[0042]
In the upper paint layer forming step, the supply of the makeup paint 60 to the roll surface 510 is performed using the doctor roll 55 provided separately from the scraping blade 54. That is, the supply of the supplementary paint 60 is performed from the paint storage section 56 formed between the doctor roll 55 and the scraping roll 51. The supply of the supplementary paint 60 is performed with the rotation of the doctor roll 55 and the scraping roll 51.
Therefore, a predetermined amount of the supplementary paint 60 can be stably supplied to the roll surface 510 as the doctor roll 55 and the scraping roll 51 rotate. This also keeps the wettability (moisture level) on the roll surface 510 almost constant.
[0043]
The make-up paint 60 supplied to the roll surface 510 is also supplied to the design surface 201 of the cement-based original plate 2 passing through the gap 59 between the scraping roll 51 and the backup roll 52. Therefore, the predetermined amount of the supplementary paint 60 is supplemented on the surface of the applied paint 40 on the design surface 201 of the cement base plate 2. Thereby, the application state of the application paint 40 on the design surface 201 is finely adjusted.
[0044]
Therefore, even when the coating material 40 is repeatedly scraped from the plurality of cement base plates 2 in the manufacturing apparatus 5, there is almost no variation in how the coating material 40 is scraped. Further, the filling paint 60 is supplied to the design surface 201 of the cement-based original plate 2 almost at the same time as the scraping is performed or immediately before the scraping is performed, so that the scraping of the scraping roll 51 can be stabilized. .
[0045]
Therefore, in the plurality of building boards 1 manufactured by scraping by the manufacturing apparatus 5 of the present example, there is almost no variation in the design appearance of each building board 1. Therefore, according to the manufacturing apparatus 5, a plurality of building boards 1 having substantially the same design appearance can be stably mass-produced.
[0046]
The reason why the scraping by the scraping roll 51 can be stabilized is considered as follows.
That is, in the present example, the supply amount of the coating material 60 to the roll surface 510 was smaller than the application amount of the coating material 40 to the design surface 201 of the cement base plate 2. Further, as described above, the wettability (moisture degree) on the roll surface 510 is kept almost constant.
[0047]
Therefore, the scraping roll 51 scrapes off the applied paint 40 having a larger absolute amount than the supplementary paint 60 while maintaining substantially constant wettability.
Therefore, the scraping roll 51 can perform scraping while leaving a small amount of the filling paint 60 on the design surface 201 of the cement-based original plate 2, and if the scraping by the scraping roll 51 can be stabilized. Conceivable.
[0048]
As shown in FIG. 7, on the design surface 201 of the cement-based original plate 2 of the present example, as the concave and convex pattern 203, the long convex portions 21, 22 and the concave portion 23 and the chevron shape in the surface direction of the design surface 201. The woodgrain was formed by the convex portions 21 and 22 and the concave portions 23 having irregular shapes such as waveforms. The long-grained convex portions 21 and 22 and the concave portion 23 mainly form a straight grain portion 205 in the woodgrain, and the irregularly-shaped convex portions 21 and 22 and the concave portion 23 form a woodgrain portion. Of the plate-like portion 206 in FIG.
[0049]
Therefore, the exposed surface 101 is formed on some of the projecting portions 21, 22 and the concave portion 23 of the design surface 201 of the building board 1 by the building board manufacturing apparatus 5, and the covering surface 102 is formed on other portions. When doing so, the building board 1 can present a natural and complex design appearance as if it were a wood board made from actual wood. Accordingly, for example, when the building board 1 is constructed as an outer wall of a building, the building board 1 can have an appearance like a wooden building, and does not absorb moisture and the like unlike an actual wood board. An outer wall having excellent weather resistance can be formed.
[0050]
As shown in FIG. 7, on the design surface 201 of the building board 1, a concavo-convex pattern forming portion 25 and a joint 26 depressed from the concavo-convex pattern forming portion 25 were formed. The joint 26 includes a vertical joint 261 formed along the longitudinal direction L of the building board 1 and a horizontal joint 262 orthogonal to the vertical joint 261.
[0051]
【The invention's effect】
As described above, according to the present invention, there is provided a building board manufacturing apparatus capable of stably scraping a scraping roll and stably mass-producing a plurality of building boards having substantially the same design appearance. can do.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a building board manufacturing apparatus in an embodiment.
FIG. 2 is an explanatory sectional view showing a building board manufactured by the manufacturing apparatus in the embodiment.
FIG. 3 is a cross-sectional explanatory view showing a cement-based original plate in the embodiment.
FIG. 4 is an explanatory cross-sectional view showing a cement-based original plate on which an upper paint layer is formed in an example.
FIG. 5 is an explanatory cross-sectional view showing a state in which a roll surface of a scraping roll is brought into contact with a design surface of a cement-based original plate in the embodiment.
FIG. 6 is an explanatory cross-sectional view showing a state in which a part of the coating material applied to the design surface of the original cement-based plate is scraped off in the embodiment.
FIG. 7 is a plan view showing a building board manufactured by the manufacturing apparatus in the embodiment.
[Explanation of symbols]
1. . . Building board,
101. . . Exposed surface,
102. . . Coating surface,
2. . . Cement base plate (building plate base plate),
201. . . Design surface,
202. . . Back,
203. . . Uneven pattern (wood grain),
205. . . Part of straight grain,
206. . . Part of the plate,
21. . . Flat convex,
211. . . Almost flat surface,
22. . . Pointed protrusion,
221. . . Pointed end,
23. . . Recess,
231. . . Bottom,
24. . . Micro recesses,
3. . . Lower paint layer,
30. . . First paint,
4. . . Upper paint layer,
40. . . Paint (second paint),
5. . . Building board manufacturing equipment,
51. . . Scraping roll,
510. . . Roll surface,
511. . . Iron core,
512. . . Sponge layer,
513. . . Rubber layer,
52. . . Backup roll,
53. . . Pressing means,
531. . . spring,
54. . . Scraping blade,
55. . . Doctor roll,
56. . . Paint storage,
60. . . Make-up paint,

Claims (3)

A scraping roll which abuts on the design surface of the original plate for a building board and scrapes off a part of the coating applied on the design surface;
A backup roll disposed opposite to the scraping roll, abutting against the back surface of the building plate original, and passing the building plate original through a gap between the scraping roll;
A scraping blade that contacts the roll surface of the scraping roll and removes the coating material scraped by the scraping roll from the roll surface;
A doctor roll that contacts the roll surface of the scraping roll and rotates together with the scraping roll;
Between the scraping roll and the doctor roll, there is formed a paint storage section for storing the makeup paint.
An apparatus for manufacturing a building board, characterized in that the makeup paint in the paint reservoir is supplied to the roll surface of the scraping roll with the rotation of the scraping roll and the doctor roll. In claim 1, the scraping roll has a sponge layer made of a sponge material, and a rubber layer made of a rubber material and disposed on the outer peripheral side of the sponge layer.
An apparatus for manufacturing a building board, wherein the backup roll has a pressing means for pressing the backup roll in the direction of the scraping roll. 3. The building board manufacturing apparatus according to claim 1, wherein the supplement paint is made of the same paint as the applied paint.

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