JPH05309638A - Unevenness patterning method on surface of cement sheet material - Google Patents

Abstract

PURPOSE:To mass-produce uneven patterns, which is deep and has a sharp edge, by a press method. CONSTITUTION:The title method is comprised of a process wherein in the case where an uneven pattern having a depth of 1/3-1/2 of a sheet thickness is patterned in the surface of a cent sheet material, a sheetlike body is shaped of a cement compound whose water content is made 40-45%, the surface of the shaped body is pressurized by pressure of 60-80kg/cm<2> by a flat plate press molding a deep groove and a deep, sharp and crossed joint is molded by controlling of water content and press pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming an uneven pattern on the surface of a cement board, and more particularly to an improvement in a method for pressing a cross joint like brickwork.

[0002]

2. Description of the Related Art Conventionally, building materials such as inorganic plate materials, which are molded from cement as a main raw material, have been very widespread. This inorganic plate material is basically nonflammable, and since the molding raw material is an inorganic material, it does not consume natural resources such as wood, can be molded into any shape, and can be used as a building material for various purposes. Have the advantage of. However, when these building materials have a simple flat plate shape, they are extremely poor in designability even though they function sufficiently as building materials, and therefore various surfaces are provided with uneven patterns to give a beautiful appearance. As the concavo-convex pattern, for example, a concavo-convex pattern such as a cross joint in brickwork may be added.

[0003]

[Problems of the Prior Art] Incidentally, it is preferable in design that the above-mentioned cross joint has a depth of about 4 to 6 mm. Therefore, the thickness of a usual inorganic plate material is 11 to 18 mm.
There is a problem in that it is technically difficult to attach uneven joints having a depth of approximately half the thickness to an inorganic plate material having a thickness of about this mm.

That is, as a means for imparting a deep uneven pattern reaching 1/3 to 1/2 of the plate thickness as described above, cast molding in which cement slurry is poured into a mold and cured, or a plate once molded and cured. There is a method of cutting the surface of the shaped body with a router or a method of giving an uneven pattern to the surface of the uncured plate material with a press, etc., but for the first cast molding, the number of molds according to the manufacturing cycle is used. However, there is a problem in that the equipment cost is very high. Further, in the case of the second cutting, since the surface of the plate material once hardened is cut, there is a problem that the processing is very time-consuming and the productivity is low. The third pressing method has few problems such as the above-mentioned equipment cost and productivity, but it is almost impossible to press-form a deep deep groove due to material factors such as fluidity and plastic deformation of the material. There was a drawback that it was difficult to create a good and deep sharp uneven pattern.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is a cement-based cement-based method for producing a textured pattern, which is capable of producing a deep textured pattern in a mass-production manner, though it is a cost-effective pressing method. The purpose of the method is to obtain a method for providing an uneven pattern on the surface of a plate material.

[0006]

[Means for Solving the Problems] That is, the method for imparting a concavo-convex pattern on the surface of a cement-based plate material of the present invention is to apply an irregular pattern at a depth of 1/3 to 1/2 of the thickness of the cement-based plate material. In the case of forming a plate-like body with a cement mixture having a water content of 40 to 45%, the shaped body surface is pressed at a pressure of 60 to 80 kg / cm ² with a flat plate press to form a groove of the depth. It is characterized by applying pressure.

[0007]

In the present invention, the plate thickness of the target plate is 11
Approximately 18 mm thick, which is generally used as a cement-based board material. Further, the compounding components thereof may be those conventionally used, and there is no particular description as a material compounding.

In the present invention, the water content of the cement material is 40 to 45% with respect to the total solid content of the cement mixture. The reason for this is that if the water content is less than 40%, the fluidity in the cement formulation will be extremely low, and fine cracks will occur due to the press pressure, and the raw material will adhere to the mold, which will hinder smooth molding. And also 45%
If the amount is increased, the flowability of the material causes the material to escape due to the pressing pressure of the flat plate press, which hinders the linearity of the joint and causes the shape of the edge part to lose its shape. This is because it becomes difficult to form good unevenness.

[0009] In addition, to the press pressure and 60~80kg / cm ^2, when that denoted by the deep enough uneven pattern lower than 60kg / cm ² becomes difficult, and also higher than 80kg / cm ^2, even if the water content This is because even if the above range is limited to the above range, an adverse effect due to the fluidity of the material will be caused, and it will be difficult to provide a joint pattern with rich linearity.

[0010]

Embodiments of the present invention will be described below. The water-containing cement mixture was adjusted to have a water content of 38%, 40%, 45%, and 50% in a cement composition consisting of 53% by weight of cement, 52% by weight of silica sand, and 5% by weight of valp fiber. A plate-shaped body having a length T of 11 mm and 18 mm is formed, and then the cross-sectional shape of the groove is formed in the plate-shaped body as shown in FIG. 1, and as shown in FIG. The cross joint 1 which is said to be attached by a press.

The state of the concavo-convex pattern by the press has the results shown in Tables 1 and 2. Table 1 shows data for a plate having a thickness of 11 mm. The cross-sectional shape of the groove 1A in FIG. 1 is groove depth D = 4 mm, groove width L ₁ = 14 mm, L ₁ / L ₂ = 14 /
8, θ = 52 °, Table 2 shows the one with a plate thickness of 18 mm,
The cross-sectional shape of the groove 1A is the groove depth D = 6 mm and the groove width L in FIG.
_{1 = 16mm, L 1 / L} 2 = 16/8, shows what was θ = 56 °.

[0012]

[Table 1]

In Table 1, * 1 indicates that the linearity of the cross joint was deteriorated although no crack was generated.

[0014]

[Table 2]

In Table 2, * 1 indicates that the linearity of the cross joint was deteriorated although no crack was generated by the pressing pressure.

[0016]

As described above, according to the present invention, by adjusting the water content of the material and the press pressure, it becomes possible to form a deep concave-convex pattern by pressing, which has been difficult in the past.
A large amount of deep cross joints can be quickly added.

[Brief description of drawings]

FIG. 1 is a diagram showing joint cross-section dimensions given by the method of the present invention.

FIG. 2 is a conceptual diagram of a cross joint provided by the method of the present invention.

[Explanation of symbols]

 1 Cross joint 1A Recessed groove G Shaped body

Claims (1)

[Claims] 1. The cement-based board material surface, 1/3 to
In the case of giving an uneven pattern with a depth of 1/2, a plate-like body is shaped with a cement mixture having a water content of 40 to 45%, and the surface of the shaped body is shaped into a groove having the above depth. A method for imparting an uneven pattern on the surface of a cement-based board material, which comprises applying a pressure of 60 to 80 kg / cm ² with a flat plate press.