JP2005034815A - Decorative powder and particulate material spraying apparatus, and method of manufacturing a decorative decorative board using the apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disperse decorative powder particles such as colored silica sand unevenly on the surface of an architectural decorative board used for an outer wall material of a house, etc., and to display a natural texture on the decorative surface. Provided are a decorative powder and dust material spraying device, and a method for manufacturing a decorative decorative board manufactured using the spraying device.
A rotating drum body (1) having a large number of recesses (5) to which decorative powder particles (8) are supplied on the surface, and dropping the decorative powder particles (8) from the recesses (5). ), And a decorative powder supply body (3) for supplying decorative powder particles (8) to the rotary drum body (1) and the decorative powder falling below the rotary drum body (1) A decorative powder and granular material dispersion device comprising a movable sword-like shield (4) that changes the falling direction of at least a part of the granular material (8). And the manufacturing method of the decorative sheet for architecture which obtains the decorative sheet for architecture excellent in the natural decorative appearance by spraying the decorative granular material (8) on the surface of the decorative sheet for building using this spraying device.
[Selection] Figure 2

Description

  The present invention is particularly suitable for use in the production of architectural decorative plates such as outer wall materials having a surface appearance such as stone pattern tone and tile pattern tone by spraying decorative powder granules. The present invention relates to a spraying device and a method for manufacturing a decorative decorative board using the spraying device.

  Conventionally, an uneven pattern was formed on the surface of an inorganic substrate, and colored coating or printing was applied to the surface to form a decorative pattern such as a stone pattern, tile pattern, brick pattern, or earthen wall pattern. Architectural decorative boards such as outer wall materials are well known.

Such a decorative veneer for building is formed by embossing a roll or embossing plate on the surface of an uncured inorganic mat formed by a wet papermaking method or a semi-dry molding method. After pressing and pressing to form the desired uneven pattern, the surface is coated with a base sealer, then decorated with colored paint, spotted coating, or ink-jet printing, and the top layer is transparent clear It is manufactured by doing.

  However, since such a decorative board for decoration is decorated by painting or printing, it is insufficient and limited to reveal the natural feeling and texture of stones and tiles. In the case of the above-mentioned conventional paint finish, the adhesion between the base material and the coating film may decrease due to long-term use, and the coating film may be damaged, such as cracking or peeling, and discolored, and the weather resistance is also sufficient. I could not say. Furthermore, when manufacturing such a decorative board for architecture, it requires complicated processes such as undercoating, intermediate coating, top coating, top coating, and many other processes such as storage, preparation and drying of paints. There was a problem that productivity deteriorated.

Therefore, for example, as shown in JP-A-5-194059, JP-A-11-226491, and JP-A-6-155424, decorative powder and granular materials such as quartz sand and colored aggregates are applied to the substrate of the decorative board for building. It is known that patterning is performed by fixing, and the decorative granular material improves the natural feeling and texture, simplifies the painting process, or improves the weather resistance.

Further, as means for dispersing such decorative powder particles, for example, as shown in JP-A-5-317794, JP-A-5-23636, and JP-A-7-171482, a powder such as silica sand is applied to an object to be coated. Means that can uniformly disperse a granular material, or means that can evenly disperse even when an uneven pattern is formed on an object to be coated are known.
Japanese Patent Laid-Open No. 5-194059 JP-A-11-226491 JP-A-6-155424 Japanese Patent Laid-Open No. 5-317794 JP-A-5-23636 JP-A-7-171482

However, with the above-mentioned conventional powder and dust material spraying means, as a result of the powder particles being sprayed with uniformity, the natural unevenness of stones, tiles, etc., and the emphasis of a mottled pattern such as a blurring pattern are sufficient. It was difficult to make it appear, and it was impossible to spray while controlling the granular material so as to show such a feeling of unevenness and a group pattern.

The present invention has been made in view of such conventional drawbacks, so that the appearance of the decorative decorative board for building is desired to show a desired natural disproportionate feeling and a feeling of emphasis on a group pattern such as a blurred pattern. It aims at providing the manufacturing method of the decorative decorative board using this dispersing device, and the decorative powder-and-particles dispersing device which can be controlled and distributed.

In order to achieve the above object, the invention apparatus of claim 1 has a rotating drum body having a large number of concave portions in the surface layer portion and dropping the decorative granular material from the concave portions, and a large number of surface layer portions of the rotating drum body. A decorative powder supply body for supplying decorative powder granules to the recesses, and a movable saw-shaped shield located below the rotating drum body and changing the falling direction of at least a part of the falling decorative powder granules It was set as the structure provided with the body.

According to a second aspect of the present invention, in the first aspect of the invention, the rotary drum body is formed by winding a flexible plate-like body having a large number of through holes or semi-through holes around the surface of a cylindrical hollow core body. It was set as the structure formed.

The invention apparatus according to claim 3 is the invention according to claim 1 or 2, wherein the decorative granular material supplied to the surface other than the numerous recesses of the rotating drum body is scraped near the peripheral surface of the rotating drum body. It was set as the structure provided with the scraping body for taking.

According to a fourth aspect of the present invention, there is provided an apparatus according to any one of the first to third aspects, wherein a net-like body is provided between the rotating drum body and the movable sword-like shielding material to disperse and stabilize the fall of the decorative particulate matter. It was.

The invention device of claim 5 is configured to include an intermittent spraying means for intermittently spraying the second decorative powder and particulate matter in front of the invention devices of claims 1 to 4.

The manufacturing method of the decorative board for building of the invention of claim 6 is the surface of an uncured inorganic material mat formed by forming an inorganic self-hardening material or a composition mainly composed of an inorganic self-hardening material and a wood material, The decorative powder granule spraying device according to any one of claims 1 to 5 is used to emboss press-mold the uncured inorganic material mat after spraying the decorative powder granulate.

According to a seventh aspect of the present invention, there is provided a method for producing a decorative decorative board according to the sixth aspect, wherein the composition is a semi-dry molding composition and constitutes at least a surface layer portion of the semi-dry molding composition. It was set as the structure in which the coloring material which colors a surface layer part was mixed in.

According to the first aspect of the present invention, the decorative granular material supplied from the supply means such as a hopper is once held in a number of recesses of the rotating drum body, and then falls downward as the rotating drum body rotates. In addition, the movable saw-shaped shield located below the rotating drum body can be dispersed in a non-uniform or constant pattern while changing the falling direction of at least some of the decorative powder particles. On the surface of the object, natural unevenness such as stone pattern and tile pattern due to decorative powder particles, and emphasis of spotted pattern such as blurring pattern can be displayed with good controllability. The feeling and texture can be improved.

According to the invention of the second aspect, in addition to the effect of the invention of the first aspect, a large number of concave portions having different patterns can be formed on the surface layer portion only by replacing a plurality of through holes or a flexible plate-like body provided with the through holes. Therefore, it is possible to easily change the rotary drum body.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the excess decorative powder particles supplied to the surface of the rotating drum body surface other than the many recesses are formed on the surface of the object to be coated. It can prevent falling.

According to the invention of claim 4, in addition to the effects of the inventions of claims 1 to 3, the dispersibility and speed of the decorative powder particles falling from the rotating drum body can be stabilized, and the decorative powder particles Can be applied with better controllability.

According to the invention of claim 5, in addition to the effects of the inventions of claims 1 to 4, it is possible to disperse the second decorative powder particles intermittently and spotwise, especially with a natural blur pattern or The shadow pattern can be displayed more emphasized.

According to the invention of claim 6, the decorative granular material can be sprayed from above the surface of the inorganic material mat, and the granular material can be fixed at the same time as the uneven formation of the inorganic material mat by the embossing type. Constructed with a surface appearance that is excellent in nature and texture, with uneven patterns such as stones and stone patterns, etc. formed on the surface, and decorative powder particles scattered on the surface in a nonuniform or accentuated pattern Can be manufactured with high productivity.

According to the invention of claim 7, in addition to the effect of the invention of claim 6, coloring of the uneven pattern on the surface layer portion and decorative powder and granular materials giving a different texture and color tone are combined to make the surface more natural. A decorative veneer with excellent texture and texture can be produced. Moreover, the coloring painting which expresses a ground color becomes unnecessary, and while a coloring painting process can be skipped significantly, the durability can be improved compared with coloring by coloring painting. Furthermore, since it is for molding a semi-dry molding composition, it does not cause the problem of wastewater treatment as in the case of wet papermaking in which a slurry-like product is dehydrated and formed into an uncured inorganic material mat. There is no problem that the mixed colorant escapes to the drainage or easily causes poor dispersion in the slurry.

FIG. 1 and FIG. 2 are longitudinal sectional views for explaining a decorative granular material spraying apparatus (A) which is the best embodiment 1 for carrying out the present invention. From FIG. 1 and FIG. 2, the decorative powder / particles distribution device (A) includes a rotating drum body (1), a decorative powder / particle supply body (3), a movable saw-shaped shield (4), and a scraping body. (2). (6) is an uncured inorganic material mat that is the object to be coated, (7) is a support plate made of FRP, metal, or the like that holds the inorganic material mat (6) and serves as a lower mold frame during molding. ) Is a decorative granular material.

As shown in FIG. 1, the decorative granular material supply body (3) has a hopper shape and supplies the decorative granular material (8) to the surface of the rotating drum body (1). Although not shown in the figure, below the supply body (3), a blocking plate for blocking the supply of the powdered granular material (8) to the surface of the rotating drum body (1), a product made of urethane rubber for adjusting the supply amount, etc. It is also possible to provide an adjustment plate.

The rotating drum body (1) is provided with a large number of concave portions (5) in the surface layer portion thereof, and the decorative powder granules (3) supplied from the decorative granular material supply body (3) to the concave portion (5). 8) is held. In the first embodiment, as shown in FIG. 2, a large number of recesses (5) are used in which cylindrical or hemispherical identical shapes are regularly arranged. However, the present invention is not limited to this. For example, as shown in FIG. 3, a large number of recesses (5) are irregularly arranged, and even if it is cylindrical, a large recess (5a) and a small recess (5b) are mixed. Alternatively, various shapes and patterns such as a rectangular shape (5c) in which different shapes are mixed can be used. The rotating drum body (1) having a number of irregularly shaped recesses (5a), (5b) and (5c) shown in FIG. 3 is irregularly arranged with the decorative powder particles (8) downward from the rotating drum body (1). It can be dropped non-uniformly, and is suitable for the case of imparting further irregularity and non-uniformity to the spray pattern on the uncured inorganic material mat (6).

The rotating drum body (1) is made of a synthetic rubber or a soft synthetic resin in which a large number of through holes or semi-through holes are formed on the peripheral surface of a cylindrical hollow core body (9) made of metal or plastic. Alternatively, a flexible plate-like body (10) made of metal or the like is wound and fixed so as to be detachable. For this reason, when it is desired to change the pattern of a large number of recesses (5) on the surface of the rotating drum body (1), this flexible plate-like body (10) has a through-hole or a semi-through-hole of another pattern. The production work efficiency can be further improved.

As shown in FIG. 2 and FIG. 4, the movable slat-shaped shield (4) is surrounded by a frame (4d), and a shielding bar (4a) having a cross-section Δ shape has a gap (4b). ) In the form of a sawtooth, which is fixed in parallel at intervals, and is connected to a driving device (not shown) via a connecting body (4c), and is connected to the conveying direction of the inorganic material mat (6). It is possible to move in the left-right direction, the front-rear direction, the left-right direction, the front-rear direction, or to rotate in a circular shape or the like, and the decorative powder particles (8) falling from the rotating drum body (1) ) In such a way that it can be moved in and out freely.

And, for the decorative granular material (8) falling downward from the rotating drum body (1), the movable sword-like shield (4) is continuously interposed with the movement in the left-right or front-rear direction, Alternatively, it can be inserted and removed intermittently with respect to the falling direction, or further, the movement and speed of these shields (4) can be changed, so that the falling decorative powder (8 ) All or at least partly collides with the shielding bar (4a) having a cross section of Δ, and the gap (4b) or shielding is changed while changing the falling direction in accordance with the intervening state and movement of the shielding body (4). It can fall from the non-intervening part of a body (4), and can disperse the decoration granular material (8) on the surface of an uncured inorganic material mat (6) in a desired non-uniform pattern shape or emphasis pattern shape. Is.

For example, the decorative granular material (8) is regularly dropped from the rotating drum body (1) in which concave portions (5) having the same shape as shown in FIG. In the case where the movable sword-like shielding plate (4) is intermittently inserted and removed in a short time with respect to the falling direction of 8), on the surface of the uncured inorganic material mat (6), the decorative granular material (8) It becomes possible to make the non-sprayed part or the part with little sprinkle appear in a regular circular shape with regularity, and when intermittently taking in and out in a long time, the above-mentioned part with little sprinkling is almost elongated It becomes possible to make it appear like a belt with regularity. Further, the decorative powder particles (8) are dropped from the rotating drum body (1), and the uncured inorganic material mat (6) is transported in a state where the movable sword-like shielding plate (4) is inserted in the dropping direction. However, when it is moved in the left-right direction at the same speed, the decorative granular material (8) can be made to appear in a corrugated dispersion pattern.

In the above, an example in which a regular spray pattern appears is shown, but the shape and arrangement of the recesses (5) of the rotating drum body (1) are randomly formed as shown in FIG. Decoration in various natural non-uniform / irregular patterns by random movement of the shield plate (4) or by providing coarse and dense gaps (4b) between the shield plates (4). Of course, the powder granulate (8) can be sprayed.

Moreover, in this Embodiment 1, although the example using a cross-section (triangle | delta) shape was shown for the shielding crosspiece (4a) of a movable saw-shaped shielding board (4), it is not restricted to this, A cross-sectional circular shape, an ellipse shape, or 4 Various shapes such as a polygon, such as a square, a pentagon, and a hexagon can also be used.

  Next, the scraping body (2) shown in FIG. 1 shows an example using a brush roll having a large number of linear protrusions densely provided on the surface thereof. This brush roll is a decorative powder (8) supplied from the decorative powder supply body (3) to the surface of the rotating drum body (1), except for the inside of the numerous recesses (5). It is provided in order to scrape and remove what is supplied to the surface portion, or to uniformize the amount of the granular material (4) supplied to the inside of the recess (5). In addition to the brush roll, the scraper (2) is fixed to a roll body provided with an elastic plate such as a urethane rubber plate on the surface, or the elastic plate in proximity to or in contact with the surface of the rotating drum body (1). It is also possible to use those that have been used.

From the above, the decorative powder and particulate matter dispersing apparatus (A), which is the best embodiment 1 of the present invention, removes the decorative powder and granular material (8) from the decorative powder and granular material supply body (3). ) Scraping body comprising brush rolls for supplying excess powder particles (8) supplied to the surface of the surface of the rotating drum body (1) other than the recesses (5). It was scraped off in (2) and removed from the surface of the rotating drum body (1), and subsequently supplied into the interior from the recess (5) that came to the downward position as the rotating drum body (1) rotated. Since the granular material (8) can be dropped, the decorative granular material (8) can be sprayed in a desired pattern on the surface of the uncured inorganic material mat (6) that is being transported and moved. It can be done.

FIG. 5: is a longitudinal cross-sectional view which shows the powdered granular material spraying apparatus (B) for decoration which is the best embodiment 2 of this invention. This spraying device (B) is a mesh-like body (11) between the rotary drum body (1) and the movable sword-like shielding plate (4) in the decorative powder and particulate matter spraying apparatus (A) according to the first embodiment. Is provided. The rotating drum body (1) and the movable slat-shaped shielding plate (4) are the same as those described in the first embodiment, and the scraping body (2).
Shows an example in which a fixed urethane rubber plate is used at the tip.

The mesh body (11) is made of a mesh body such as a wire mesh, and drops when the decorative granular material (8) falling from the recess (5) on the surface of the rotating drum body (1) or a part thereof hits the net. It can be provided to adjust and stabilize dispersibility and drop speed. Further, the mesh body (11) is not limited to a single body as shown in FIG. 5, and a plurality of mesh bodies (11) can be used at the top and bottom, and can be formed so as to be capable of vibrating.

In addition, it can also be set as the composite apparatus which combined the other granular powder dispersal means for decoration before and after the decorative powder particle dispersing apparatus (A) or (B) of Embodiment 1 or 2 demonstrated above. For example, the intermittent spraying means (12) shown in FIG. 7 may be arranged immediately after the powder and dust material spraying device (A) or (B) so that the decorative powder and granular material (8) can be spotted. it can. The intermittent spraying means (12) includes a decorative powder supply port (12a), a compressed air supply port (12b), and a decorative powder particle spray port (12c), and intermittently supplies compressed air. And the supplied granular material (8) is spot-sprayed on the surface of the uncured inorganic material mat (6), which is the object to be coated, from the spray port (12c), in particular by the granular material (8). It is suitable for making an emphasized blurring pattern or shading pattern appear.

Next, the manufacturing method of the decorative board for buildings using the decorative powder and granular material spraying apparatus of the present invention will be described with reference to FIG. (A) of FIG. 6 shows a semi-dry composition for a core layer mainly composed of a self-hardening inorganic material such as cement and a wood material on a support plate (7), and a self-hardening inorganic material such as cement. A semi-dry composition for the front and back layers in which a wood material is the main raw material and color pigments are mixed with this is spread and deposited in the order of the back layer (6c), the core layer (6b), and the surface layer (6a) by a forming device. And the process of carrying out the semi-dry-type shaping | molding of the uncured inorganic material mat | matte (6) of 3 layers structure with which the front and back were colored is shown.

Here, as the self-hardening inorganic material, Portland cement, slag cement, alumina cement, silica cement, fly ash cement, or a mixture of these cements with siliceous materials such as silica sand, shirasu, and silica powder, magnesium carbonate Etc. can be used.

As the wood material, wood pieces, wood flakes, wood fiber bundles, waste paper fibers, pulp, bleached kraft pulp, sawdust, wood powder, or pulverized wood cement board waste can be used. The wood material for the core layer (6b) is mainly made of a rough wood material such as a piece of wood or wood flake to reduce the weight, and the wood material for the front and back layers (6a) and (6c) is made of the core layer (5c). It is preferable to increase the density of the front and back layers by using a finer wood material than that used to improve the strength properties. In addition, bleached kraft pulp is mainly used for the surface layer (6a) in order to prevent the color of the woody material from appearing as stains or uneven color in the surface layer (6a) during autoclave processing described later. it can.

As the coloring pigment, inorganic pigments are preferable in terms of excellent weather resistance, and natural and synthetic iron oxides such as Bengala, titanium oxide, carbon black, chromium oxide, etc. can be used, and these inorganic pigments can also be used. It is also possible to add an organic pigment to the pigment and use it. In the third embodiment, an example in which the color pigment is mixed into the composition for the front and back layers (6a) and (6c) has been shown, but it is needless to say that the color pigment may be mixed into the composition for the surface layer (6a).

  As other additives, known additives such as inorganic foams such as perlite and shirasu balloon, or chemicals such as a curing accelerator, an efflorescence inhibitor, and a water resistance imparting agent can be added.

Specific examples of the semi-dry composition for the core layer (6b) include 50 parts by weight of Portland cement, 20 parts by weight of a siliceous material such as silica sand, 15 parts by weight of a wood material mainly composed of wood flakes, and inorganic foam such as pearlite. Examples thereof include 15 parts by weight of body and 42 parts by weight of water. Further, as a specific example of the semi-dry composition for the front and back layers (6a) and (6c), 50 parts by weight of Portland cement, 18 parts by weight of siliceous material, 15 parts by weight of wood material with about half of the fine wood flakes and pulp, Examples thereof include 15 parts by weight of an inorganic foam such as pearlite, 2 parts by weight of a color pigment, and 38 parts by weight of water.

Next, on the surface of the obtained uncured inorganic material mat (6), using any of the decorative powder and particulate matter dispersing devices (A) or (B) described in the first or second embodiment, Sprinkle powder (8). (B) of FIG. 6 has shown the state by which the granular material for decoration (8) was sprayed on the uncured inorganic material mat (6). The description of the spraying process to the uncured inorganic material mat (6) by the decorative powder particle spraying device (A) or (B) is as described in the first or second embodiment, and will be omitted.

Here, the material and shape of the decorative powder granule (8) to be used are not particularly limited. For example, powder of ore powder, sand, colored sand, artificial colored aggregate, and ceramic pulverized Examples thereof include granules, mica, rock wool pulverized material, glass pulverized material, and colored resin pieces. In view of weather resistance, it is desirable to use an inorganic powder (8). Moreover, such a decorative granular material (8) can also be used in combination of a plurality of different materials and shapes.

FIG. 6 (c) shows an emboss in which a predetermined concavo-convex pattern (13a) (13b) is provided on the surface of the uncured inorganic material mat (6) obtained as described above, on which the decorative granular material is dispersed. The process of mounting a template (14) and press-pressing the uncured inorganic material mat (6) is shown. In this pressing and pressing step, a plurality of sets are deposited by placing the uncured inorganic material mat (6) on the support plate (7) and placing the embossed mold (14) thereon. However, this can be performed by cold pressing with a predetermined pressure.

By this pressing and pressing, as shown in FIGS. 6 (d) and 6 (e), the uncured inorganic material mat (6) is formed to a predetermined thickness by reducing the entire thickness thereof. Then, the colored surface layer (6a) is formed by embossing template (14) with joint groove-shaped recess (15a) and decorative surface convex part (15b) and decorative surface convex part (15a) defined by the concave part (15a). A fine irregularity such as a stone surface is formed on the surface of 15b), and a decorative powder (8) having a color tone different from that of the colored surface layer (6a) is desired on the surface of the colored surface layer (6a). An architectural decorative board (P) having an excellent natural view and texture, dispersed in the above pattern, is obtained.

  The architectural decorative board (P) thus obtained is cured by heating in a conventional manner and then further autoclaved. Before or after this autoclave curing, or before and after, Actual finishing of the part and other finishing processing, and clear coating with a synthetic resin paint such as sealer coating can be applied to the entire surface. In the case of clear coating before the autoclave curing, after spraying the decorative granular material (8) in FIG. 6 (b), during the press-clamping in FIG. 6 (c), or in FIG. 6 (d) This can be performed after pressing, and in the case of press-clamping in FIG. 6 (c), a release material and a clear paint are applied to the pressing surface of the embossing template (14), and simultaneously with press-clamping. This can be done by applying a clear paint to the uncured inorganic material mat (6). Thus, if clear coating or sealer coating is performed before autoclave curing, generation of efflorescence during autoclave curing can be suppressed.

  In the method for manufacturing the decorative board for building (P), an example in which the uncured inorganic material mat (6) is formed by semi-dry molding has been shown. However, the present invention is not limited to this, and a wet papermaking slurry is prepared. A paper mat produced by papermaking using a long-mesh type or round netting type papermaking machine and subjected to dehydration treatment can also be used as the uncured inorganic material mat (6). However, in this case, the problem of wastewater treatment, the problem that the dispersibility of the coloring material in the slurry when mixed with the coloring material is inferior to that of the semi-dry molding, the decorative particulates (8) Has a problem that it is easy to be embedded in the paper mat and the amount of appearance on the surface is smaller than that of semi-dry molding, and the surface layer of the decorative decorative panel (P) is colored or decorated on this surface layer. In order to improve the decorative value by spraying the powdered granular material (8), it is preferable to carry out by semi-dry molding.

Moreover, in this embodiment, the example which mixed the coloring material in the composition for front and back layers (6a) (6c) was shown. Since the ground color can be expressed by mixing the coloring material, complex colored coating can be omitted in the subsequent process, so productivity is good, and there is a risk of appearance defects due to coating film deterioration like colored coating. It is preferable because a good colored appearance can be maintained for many years. Moreover, the sprinkled decorative powder particles (4) are not concealed by the colored coating, and the natural texture can be further revealed in combination with the colored ground color of the surface layer (5a).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view for explaining a decorative powder and granular material spraying apparatus (A) which is the best embodiment 1 for carrying out the present invention. The principal part enlarged view explaining the powdery granular material dispersion | spreading apparatus (A) for decoration same as the above. The top view which shows the modification of a rotating drum body (1). The top view explaining a movable slat-like shielding board (4). The longitudinal cross-sectional view explaining the powdered granular material dispersion | spreading apparatus (B) for decoration which is the best Embodiment 2 for implementing this invention. Explanatory drawing of the best Embodiment 3 for enforcing the manufacturing method of the decorative board for buildings using the powdered granular material dispersion | spreading apparatus for decoration of this invention. Sectional drawing explaining an intermittent spraying means (12).

Explanation of symbols

(1) Rotating drum body (2) Scraping body (3) Powder supply for decorative material (4) Movable slat-shaped shielding plate (5) Recess (6) Uncured inorganic material mat (7) Support plate (8) ) Decorative powder (9) Tubular body (10) Recessed sheet (11) Net (12) Intermittent spraying means (13) Decorative powder supply port (14) Embossed template
(15a) Joint groove-shaped concave part (15b) Decorative face convex part (P) Architectural decorative board

Claims (7)

A rotating drum body that has a large number of recesses in the surface layer portion and drops the decorative powder particles from the recesses, and a decorative powder particle material that supplies the decorative powder particles to the numerous recesses in the surface layer portion of the rotating drum body A decorative powder granule comprising a supply body and a movable saw-shaped shield that is positioned below the rotating drum body and changes a falling direction of at least a part of the falling decorative powder granule Spraying equipment. The rotary drum body is formed by detachably winding a flexible plate-like body having a large number of through holes or semi-through holes on the surface of a cylindrical hollow core body. The decorative powder and granular material dispersion apparatus according to 1. A scraping body for scraping off decorative powder particles supplied to a surface other than a number of recesses of the rotating drum body in the vicinity of the peripheral surface of the rotating drum body. 3. A decorative powder particle dispersion apparatus according to 1 or 2. 4. A decorative powder granule according to any one of claims 1 to 3, wherein a net-like body is provided between the rotating drum body and the movable saw-like shielding material to disperse and stabilize the fall of the decorative powder granular material. Material spraying device. An ornamental powder granule comprising intermittent dispersal means for intermittently spraying the second decorative powder granule in front of the ornamental powder dispersal device according to claim 1. Spraying equipment. The decorative powder according to any one of claims 1 to 5, wherein the decorative powder according to any one of claims 1 to 5 is formed on a surface of an uncured inorganic material mat formed by forming an inorganic self-hardening material or a composition mainly composed of an inorganic self-hardening material and a wood material. A method for producing an architectural decorative board, comprising: embossing press-molding the uncured inorganic material mat after spraying a decorative powder granule using a granular material spraying device. The composition is a semi-dry molding composition, and in the composition constituting at least the surface layer portion of the semi-dry molding composition, a coloring material for coloring the surface layer portion is mixed. Item 7. A method for producing an architectural decorative board according to Item 6.

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