JP2002178319A - Method for manufacturing inorganic panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an inorganic panel capable of obtaining the inorganic panel uniform in thickness when an uneven pattern is formed on the surface of a cementitious original panel by subjecting the original panel to press molding. SOLUTION: The cementitious original panel 2 is arranged on a press molding machine and subjected to press molding to manufacture the inorganic panel having the uneven pattern formed on its surface. The central part of the original panel 2 is formed into a recessed shape on a cross-sectional view at least in the single side direction of the panel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cement-based original plate which is set in a press forming machine, and the above-mentioned original plate is press-formed.
The present invention relates to a method for manufacturing an inorganic plate having an uneven pattern on its surface.

[0002]

2. Description of the Related Art Plate-like inorganic plates are known as exterior and interior materials for buildings. The above-mentioned inorganic plate is made of cement as a raw material, and a molding material in which fibers and the like are mixed is formed into an original plate by extrusion molding, and this wet original plate obtained by cutting to a certain length is press-formed, pressed and pressed. It is manufactured through a process of forming an uneven pattern on the surface and then curing and curing. Vibration and vacuum press molding are employed for the press molding.

[0003]

The above-mentioned plate-like inorganic plate is, for example, 1 m in width, 3 m in length, and 15 to 35 mm in thickness.
The shape having the shape of has been widely used. In order to obtain such an inorganic plate, as an original plate, when a plate having a flat surface in cross section is produced and press-formed, the inorganic plate is
The central portion tended to be thicker than the peripheral portion, and it was difficult for the thickness to be uniform.

The present invention has been made in view of the above circumstances, and an object of the present invention is to press-mold a plate-shaped cement-based original plate to form an uneven pattern on the surface so that the thickness is uniform. It is an object of the present invention to provide a method for producing an inorganic plate capable of obtaining a simple inorganic plate.

[0005]

Means for Solving the Problems The applicant of the present invention has conducted intensive studies in order to achieve the above-mentioned object, and as a result, when forming an original plate having a flat surface in cross-sectional view and forming an uneven pattern, a concave portion The material of the original plate moves to the periphery, but the material of the central part remains in the original plate, and the material of the peripheral part escapes to the outside of the product system. As a result, they have found that the thickness of the central portion and the peripheral portion can be made uniform, and have completed the present invention. In addition, the applicant of the present invention has found that the effects of the present invention are remarkably exhibited particularly in a vibration press molding machine, since the material of the original plate becomes very easy to move when the molding is performed by the vibration press molding machine, so that the peripheral portion is easily thinned. In addition, the original plate produced by extrusion molding was found to add a thickener, so that the peripheral portion was easily thinned, and found that the effect of the present invention was particularly remarkably exhibited by extrusion molding, and completed the present invention. It has been reached.

[0006] According to a first aspect of the present invention, there is provided a method of manufacturing an inorganic plate in which a plate-shaped cement-based original plate is set in a press molding machine, and the original plate is press-formed to form an uneven pattern on the surface. In the above, the original plate is characterized in that the center is formed in a concave shape at least in a sectional view in one side direction.

According to a second aspect of the present invention, in the method of manufacturing an inorganic plate according to the first aspect, the original plate is manufactured by an extrusion method.

According to a third aspect of the present invention, in the method for manufacturing an inorganic plate according to the first or second aspect, the press forming is performed using a vibration press forming machine.

According to a fourth aspect of the present invention, in the method for manufacturing an inorganic plate according to any one of the first to third aspects, the central concave shape of the original plate is 0.3 to 0.3 times the total length of the cross section. It is characterized by 0.7 mm / m.

[0010]

1 to 3 show an example of an embodiment corresponding to the present invention. FIG. 1 is a schematic view showing a press forming process for each step, FIG. 2 is a perspective view of an original plate, FIG. 3 is a perspective view of the inorganic plate.

The inorganic plate 1 to which the present invention is applied is a plate-like inorganic plate used as an exterior or interior material for a building. The inorganic plate 1 was prepared by placing a plate-shaped cement-based original plate 2 in a press molding machine and press-forming the original plate 2 to form an uneven pattern formed of concave grooves 23 and flat convex portions 24 on the surface. Things. As the molding size of the inorganic plate 1, for example, the width H is 1 m, the length L is 3 m, and the thickness T is 1
One having a diameter of 5 to 35 mm is exemplified.

The material used for producing the original plate 2 is cement as a main raw material, and silica, reinforcing fibers, and other contaminants (eg, a thickener, a lightening material, a powder, etc.) are blended with the cement. Then, a mixture of water and water can be used. Known cements such as Portland cement, blast furnace cement, and alumina cement can be used as the cement. As the silica component to be mixed with the cement, powdered silica having a large specific surface area is preferable from the viewpoint of improving the toughness of the cured product. In the case of extrusion molding, the compounding ratio is preferably such that silica is compounded in a ratio of 20 to 120 parts by weight with respect to 100 parts by weight of cement, and if less than 20 parts by weight, the strength of the obtained cement hardened material (inorganic plate) is insufficient. If it is reduced and exceeds 120 parts by weight, extrusion molding becomes difficult. As the reinforcing fiber, L
Materials, N materials, pulp fibers such as ramie and linter, vinylon, polypropylene and the like are used. The compounding ratio of this reinforcing fiber is preferably 5 to 25 parts by weight with respect to 100 parts by weight of cement, and if it is less than 5 parts by weight, the strength of the hardened cement becomes insufficient, and if it exceeds 25 parts by weight, molding becomes difficult. In addition to the above raw materials, methylcellulose, ethylcellulose, thickening agents such as carboxymethylcellulose and resin-based hollow bodies, shirasu balloon, lightweight materials such as pearlite,
Powders such as fly ash can be contained as needed.

The original plate 2 is prepared by dry blending the above-mentioned materials and adding 100 to 100 parts by weight of cement.
It is obtained by adding 150 parts by weight of water, kneading with a kneader, extruding with an extruder, and cutting into a fixed length (for example, 3 m).

In the present invention, as shown in FIG. 2, the above-mentioned original plate 2 is used whose shape in the width direction is formed such that the center thereof is concave in cross section. The original plate 2 can be manufactured by using a mold having a convex central portion as a mold of an extrusion molding machine. In the original plate 2, the thickness of the central portion 11 is gradually thinner than the thickness of the peripheral portion 12 in the width direction. The concave amount A of the concave portion at the center of the original plate is preferably in the range of 0.3 to 0.7 mm / m with respect to the total length in the width direction. For example, when the thickness B of the peripheral portion 12 is 16.
When the original plate 2 having a size of 5 to 21 mm is used, a depression having a depression amount A of about 0.5 mm may be formed for a width of 1 m.

In the method of manufacturing an inorganic plate according to the present invention, the original plate 2 is set on a press molding machine, and the original plate 2 is press-formed to form an uneven pattern on the surface. As the press molding machine, a vibration press molding machine can be used to form a sharp pattern. The press molding is shown in FIG.
As shown in (a) to (c), the original plate 2 is placed on a base 4 below a molding die 3, and an outer frame 5 is arranged so as to surround the outer periphery of the original plate 2. The molding die 3 includes a mold 3
1 and a mold mounting plate 32 and the like. Then
The molding die 3 is lowered to press the original plate. An uneven pattern corresponding to the pattern of the inorganic plate 1 as a product is formed on the surface 6 of the molding die 3. Thereafter, the outer frame 5 is released, and then the molding die 3 is lifted and released to obtain the plate-like inorganic plate 1. The inorganic plate 1 has a uniform thickness at the central portion 21 and the peripheral portion 22 as shown in FIG.

The product obtained by the press molding is cured and cured in a subsequent curing step, and is subjected to a surface decorative coating as appropriate.

The original plate used in the method for producing an inorganic plate is not limited to one manufactured by extrusion, but may be one obtained by a papermaking method or one obtained by a casting method. In the case of producing an original plate having a concave center in the above-mentioned papermaking method, it is only necessary to make a sheet using a roll having a convex central portion. What is necessary is just to manufacture using a casting mold. In addition, when the original plate is manufactured by the casting method, it is possible to manufacture the original plate whose center is concave not only in the width direction but also in the longitudinal direction.

[0018]

According to the method for producing an inorganic plate of the present invention, the thickness of the central portion and the peripheral portion can be made uniform by using an original plate having a concave center at least in a sectional view in one side direction. An inorganic plate can be obtained.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment corresponding to the present invention,
(A)-(c) is the schematic which showed the process of press molding for every step.

FIG. 2 is a perspective view of an original plate according to the first embodiment;

FIG. 3 is a perspective view of an inorganic plate.

[Explanation of symbols]

 Reference Signs List 1 inorganic plate 2 original plate 3 molding die

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hakusan Toyoman 1048 Odakadoma, Kadoma-shi, Osaka Matsushita Electric Works F-term (reference) 4G054 AA01 AA15 AB04 AC04 BA02 BA29 BD14 4G055 AA02 AB03 AC01 BA44

Claims (4)

[Claims] 1. A method for producing an inorganic plate, in which a plate-shaped cement-based original plate is placed in a press molding machine, and the original plate is press-formed to form an uneven pattern on a surface thereof,
A method of manufacturing an inorganic plate, wherein the center is formed in a concave shape at least in a sectional view in one side direction. 2. The method for producing an inorganic plate according to claim 1, wherein the original plate is manufactured by an extrusion method. 3. The method according to claim 1, wherein the press forming is performed using a vibration press forming machine. 4. The inorganic plate according to claim 1, wherein the amount of concave depression at the center of the original plate is 0.3 to 0.7 mm / m with respect to the entire length of the cross section. Manufacturing method.