JPH06155424A - Production of inorganic plate - Google Patents

Abstract

PURPOSE:To easily produce an inorg. plate having fine embossed patterns at a predetermined place on the surface thereof by sprinkling particles over the predetermined place on the surface of a mold and sprinkling an inorg. material thereon to form a mat and pressing the mat by mold clamping to age and cure the same to transfer the particles to the surface of the cured mat. CONSTITUTION:Sand 5 being a particulate material is sprinkled over the surface having embossed patterns formed thereto of the template 1 fixed on a caul plate 2. The template 1 is placed on a vibration conveyor 6 along with the caul plate 2 to be vibrated and the sand 5 falls in the recessed part of the surface 1A of the template 1. Subsequently, an inorg. plate material composed of cement, silica sand, pearlite, wood pieces and water is scattered over the template to form a mat 7 constituted of a low density rear layer 7B mixed with coarse wood pieces and a high density surface layer 7A mixed with fine wood pieces. The mat 7 is pressed by clamping and aged and cured to be demolded. The sand 5 is transferred to the surface of the cured mat 17A. Therefore, an inorg. plate having fine embossed patterns on the surface thereof at a predetermined place is obtained by a reduced number of processes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an inorganic plate having a fine uneven pattern on its surface, which is useful as a building plate.

[0002]

2. Description of the Related Art Conventionally, in order to produce an inorganic plate having a fine irregular pattern on the surface as described above, a base coat layer (adhesive layer) is formed on the surface of a substrate having irregularities, and when the base coat layer is undried. Only the base coat layer existing on the top surface of the convex portion is removed, and then the granular material is sprayed on the surface of the base material to remove the particles not fixed by the base coat layer, and then the cosmetic coating film is formed only on the top surface of the convex portion. Then, a method of applying an overcoat is provided (Japanese Patent Publication No. 60-296).
No. 31).

[0003]

However, in the above-mentioned conventional method, the number of steps is extremely large and laborious.

[0004]

Means for Solving the Problems As a means for solving the above-mentioned conventional problems, the present invention sprays a granular material (5) at a predetermined position on a mold surface (1A), and then an inorganic material The present invention provides a method for producing an inorganic plate (17), which is sprayed to form a mat (7), and the mat (7) is pressed and cured by pressure curing.

The inorganic plate material used in the present invention includes cement, gypsum, hardenable inorganic powder such as magnesium carbonate, silica sand, silica stone powder, pearlite, zeolite,
It is a mixture of aggregates such as shirasu balloons and glass balloons, wood chips, wood fibers, glass fibers, ceramic fibers, reinforcing materials such as organic synthetic fibers, etc. Water is mixed into the mixture.

The granular material used in the present invention means
Sand, stone powder, ceramic powder, glass powder, plastic powder,
Inorganic pigment powder, organic pigment powder, and the like, and the above-mentioned granular material may be colored.

In the present invention, the above-mentioned inorganic plate material mixture is sprinkled on the mold surface to form a mat, and the mat is pressurized,
The particles are pressure-hardened, but before the inorganic plate material mixture is sprayed, the above-mentioned granules are sprayed at predetermined places on the mold surface.

A predetermined uneven pattern may be formed on the mold surface. In this case, if the granular material is scattered on the mold surface and then vibrated, the granular material falls or slides into the concave portion of the mold surface. Accumulated.

[0009]

In the present invention, since the granular material is previously sprayed at the predetermined places on the mold surface as described above, when the mat of the inorganic plate material mixture is pressed and hardened by compression, the mat cured product is obtained. The granular material bites and transfers to the surface. In this way, an inorganic plate in which the granular material is transferred to predetermined places on the surface is produced, but the inorganic plate may be coated if desired.

[0010]

EXAMPLE A mold plate (1) shown in FIG. 1 has a mold surface (1A) having an uneven pattern and is fixed on a call plate (2). As shown in FIG. 2, sand (5) is sprinkled on the mold surface (1A) of the mold plate (1) as granular material. To disperse the sand (5), a pair of rollers are placed just below the hopper (3) filled with the sand (5).
Arrange a spraying device (4) consisting of (4A, 4B), but the sand (5)
In order to disperse randomly, the rotation axis of the other roller (4B) is eccentric, and the gap between the rollers (4A, 4B) is changed.

Thus, as shown in FIG. 3, the sand (5) is irregularly scattered on the mold surface (1A), and then the mold plate (1) together with the call plate (2) vibrates the conveyor (6). It is placed on top and vibrated. Sand scattered on the mold surface (1A) by the vibration
(5) falls from the convex part to the concave part.

After the sand (5) is thus gathered on the mold surface (1A) toward the concave portion, an inorganic plate material having the following formulation is sprinkled on it, as shown in FIGS. 4 and 5. Cement 41 parts by weight Silica sand 39 〃 Perlite 5 〃 Wood chips 15 〃 Water 28 〃

In FIG. 4, a high-density surface layer (7A) is formed using the above-mentioned inorganic plate material in which fine wood pieces that pass through a 5 mm mesh are mixed as wood pieces, and in FIG.
A low density backing layer (7B) is formed by using the above-mentioned inorganic plate material in which coarse wood pieces which have passed through the mesh of 5 mm and not through the mesh of 5 mm are mixed. Wind sorting is applied to separate wood pieces into fine wood pieces and large wood pieces as described above.

After forming the mat (7) consisting of the high-density surface layer (7A) and the low-density back layer (7B) on the mold surface (1A) of the mold plate (1) in this way, it is shown in FIG. As described above, the periphery of the mat (7) is trimmed by the cutter (8), and the thickness of the mat (7) is regulated by the brushing roll (9).

After the mat (7) is trimmed and the thickness is regulated, the mat (7) is pressed by the press (10) as shown in FIG. Pressurization conditions are usually 15 to 30 Kgf / cm
^{Since the} mat (7) is hardened by being pressed and cured at 50 to 80 ° C. for 18 hours, the mat hardened product (17A) is demolded as shown in FIG. Machine
Vacuum suction at (11) removes the mold (1) from the sand (5)
Is transferred to the surface of the cured mat (17A).

After the sealer treatment, the matte cured product (17A) is sprayed with a coating material (13A) from a nozzle (12) to form a coating film (13) as shown in FIG. The coating film (13) is dried to obtain an inorganic plate product (17) as shown in FIGS. 10 and 11.

The inorganic board product (17) comprises a hardened high-density surface layer (7A) and a low-density backing layer (7B), and the sand (5) is a mold surface (1A).
In the product (17), the sand (5) gathers on the convex portion corresponding to the concave portion of the mold surface (1A) to form a fine concavo-convex pattern.

In this embodiment, the inorganic board product (17) has a two-layer structure consisting of the high-density surface layer (7A) and the low-density back layer (7B), but in the present invention, as shown in FIG. An inorganic plate product (27) having a three-layer structure including (7A), a low-density backing layer (7B), and a high-density backing layer (7A ′) may be provided.

[0019]

Therefore, according to the present invention, an inorganic plate having a fine concavo-convex pattern formed on a predetermined portion of the surface can be obtained by a small number of steps.

[0020]

[Brief description of drawings]

 1 to 11 show an embodiment of the present invention.

1] Side view of template

[Fig.2] Sand distribution state diagram

[Fig. 3] Vibration state diagram

FIG. 4 High-density surface layer formation state diagram

FIG. 5: State diagram of low-density core layer formation

FIG. 6 is a trimming and thickness regulation state diagram

[Figure 7] Pressurized state diagram

[Figure 8] Demolded state diagram

[Figure 9] Painting status diagram

[Figure 10] Product cross section

[Figure 11] Product perspective view

FIG. 12 is a sectional view of the product of another embodiment.

[Explanation of symbols]

 5 Sand 7 Mat 17A Cured mat 17,17 products

Claims (1)

[Claims] 1. An inorganic material characterized in that a granular material is sprayed at a predetermined position on a mold surface, and then an inorganic material is sprayed onto the mat to form a mat, and the mat is pressed, cured by pressure and cured. Board manufacturing method