JP2686702B2 - Method for producing cement board with uneven pattern - Google Patents

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 a cement board with a concavo-convex pattern for forming a molding pattern in which the concavo-convex pattern on the wall surface of a building is continuous vertically and horizontally.

[0002]

2. Description of the Related Art In recent years, due to the tendency of individualization and upsizing of the outer wall boards of houses, it is desired that the unevenness of the surface has a molding beauty that is continuous vertically and horizontally at the time of construction. The cutting of the board in the process of manufacturing the outer wall board with the ruggedness must be performed with consideration for dimensional accuracy so as not to create a feeling of strangeness with the vertical and horizontal uneven patterns during construction. From such a viewpoint, conventionally, for example, as seen in JP-A-4-361006, when forming an uneven pattern on an uncured cement plate with a press die, a concave part different from this uneven pattern is formed. Immediately after that, a method is known in which the concave portion is detected by a sensor, alignment is performed, and the cement plate is cut. However, in the above method, the cut cement plate is then subjected to curing, curing and drying steps, but the dimensional variation due to shrinkage of the cement plate during these steps is not taken into consideration, and therefore the wall surface There is a problem that a pattern shift of an uneven pattern is likely to occur between the cement plate and the adjoining cement plate at the time of the adhered construction.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention provides a method for producing a cement board with a relief pattern, wherein the relief pattern of the cement board can be formed with the same dimensional accuracy as possible with the relief pattern of the template. Another object of the present invention is to provide a method for manufacturing a cement board, which allows the cement board with a concavo-convex pattern to be easily cut at a predetermined position, thereby solving the above-mentioned problems of the prior art.

[0004]

That is, the first invention of the present application uses a template in which an iron plate or a stainless plate is bonded and integrated to the back surface of a fiber reinforced plastic template part having an uneven pattern on the surface thereof. A gist of a method for producing a cement board with an uneven pattern, which is characterized by placing a fiber-reinforced cement raw material on the board surface, then heat-curing this under pressure, and then removing from the mold and drying. The second invention is a template in which an iron plate or a stainless plate is adhered and integrated to the back surface of a fiber-reinforced plastic template portion having an uneven pattern on the surface and having reference strips for detection in the longitudinal and lateral directions of the surface, respectively. A method for producing a cement board with an uneven pattern characterized by placing a fiber-reinforced cement raw material on the surface of the template, then heat-curing it under pressure, then removing from the mold and drying. It is what

[0005]

According to this manufacturing method, when the fiber-reinforced cement raw material is heated and hardened in the presence of the template, the fiber-reinforced cement sheet obtained causes a dimensional extension due to thermal expansion of the template. In the subsequent drying step, the size is reduced, and the reduced amount substantially coincides with the extension of the above size. Therefore, the uneven pattern of the cement plate matches the uneven pattern of the template. Furthermore, in the manufacturing method of the second invention, when the fiber-reinforced cement board is cut into a predetermined size in the subsequent step, it is accurate with reference to the vertical and horizontal detection reference lines provided by the template. It is possible to perform cutting processing by performing various positioning.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 2 to 4, the template 1 used in this example is a fiber having an uneven pattern 2 on the surface and convex detection reference strips 3 for detection in the longitudinal and lateral directions of the surface, respectively. Reinforced plastic (hereinafter referred to as FRP) template 4
An iron plate or a stainless plate 5 is bonded and integrated with an adhesive 6 on the back surface of the. Thus, in this example, as shown in FIG. 1, the template 1 is placed on the conveyor 8 of the former 7 and moved, and the fiber reinforced in a wet state having hydraulic properties together with the airflow from above. A cement raw material 9 is dropped onto the template 1 and loaded to a predetermined thickness (see FIG. 1 (a)). Next, the loaded mat-like raw material 9 is stacked on the carriage together with the template 1, and is pressed by the press machine 10 (see FIG. 1 (b)). Fix it to a certain height with (see Fig. 1 (c)). Next, the raw material 9 in the pressed state is heated at a temperature of 60 to 8 together with the template 1 and the carriage 12.
It is introduced into the heating chamber 13 at 0 ° C. and heat-cured for 6 to 24 hours (see FIG. 1 (d)). Cement board 1 made from this raw material 9
After curing of No. 4, carried out together with the dolly 12 (see FIG. 1 (e)),
The lock mechanism 11 of the carriage 12 is released to separate the cement plate 14 and the template 1 (see FIG. 1 (f)), and the cement plate 14
Is dried by a dryer 17 (see FIG. 1 (g)).

Cement board 14 thus obtained
5 to 7, the concavo-convex pattern 2 of the template 1 and the concavo-convex pattern 15 of the reverse plate of the convex detection reference strip 3 and the concave detection reference strip 16 are formed on the plate surface, and at room temperature. The unevenness pattern 15 and the concave detection reference strip 16 were found to have the same size in the vertical and horizontal directions on the surface of the plate with the uneven pattern 2 and the convex detection reference strip 3 of the template 1 as described later. The cement board 14 is conveyed to a cutting device 18, and the detection reference strip 16 is detected by a sensor to accurately regulate the reference position to perform cutting processing and necessary edge processing such as actual processing. To make a product (see Fig. 1 (h)).

In the manufacturing method of this embodiment, when the raw material 9 is heated and hardened in the presence of the template 1, the resulting fiber-reinforced cement board 14 causes a dimensional extension due to thermal expansion of the template 1. A reduction in size occurs in the drying process after the mold is removed, and this reduction corresponds to the extension of the above size. Therefore, the uneven pattern 15 of the cement plate 14 matches the uneven pattern 2 of the template 1.

The coefficient of thermal expansion of the template 1 used in this example is the coefficient of linear expansion shown in Table 1. As a comparative example, an iron plate, a stainless plate, an aluminum plate, and a FRP simple plate are also listed.

[Table 1] According to Table 1, the aluminum plate has a linear expansion coefficient similar to that of the template 1 of this example, but is not suitable because it is easily corroded by the alkali component of the cement in the raw material 9 of the cement plate and becomes expensive. . Table 2 shows the dimensional difference when the template 1 of this example and the FRP single template heating chamber 13 as a comparative example are heated to the temperature (60 ° C.).

[Table 2] Table 3 shows the measurement results of the dimensions after heat curing and the dimensions after drying of the cement plate produced using the template shown in Table 2.

[Table 3] As can be seen from Table 3, the cement board obtained by the template of this example has the same size as the template, but the cement board of the comparative example has a size slightly larger than the dimension of the template. It was

[0010]

As described above, in the method of the present invention, the cement plate heat-cured by the heat-expanded template in the heat-curing process is reduced in size due to drying after demolding. Since the extension of the cement plate at the time of heat curing due to the thermal expansion of the template substantially matches, the uneven pattern of the cement plate can match the uneven pattern of the template as much as possible, and thus the cement plate is constructed. When applied to an object, it is easy to match the patterns of the concavo-convex patterns of the cement plates that are adjacent to each other vertically and horizontally. Furthermore, in the method of the second aspect of the present invention, the cement plate can be easily cut at a predetermined position with reference to the reference strips for detection in the vertical and horizontal directions provided by the template.

[Brief description of the drawings]

FIG. 1 is a process explanatory diagram of an example of the present invention.

FIG. 2 is a plan view of a template used in the above example.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along the line BB of FIG.

FIG. 5 is a plan view of a cement board obtained by the above example.

6 is a cross-sectional view taken along line CC of FIG.

FIG. 7 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

 1 template 2 uneven pattern 4 template 5 iron plate or stainless plate 9 raw material

Claims (2)

(57) [Claims] 1. A template in which an iron plate or a stainless plate is bonded and integrated to the back surface of a fiber reinforced plastic template having an uneven pattern on the surface is used, and a fiber reinforced cement raw material is placed on the template surface, and then this is used. A method for producing a cement board with a concavo-convex pattern, which comprises heat-curing under pressure, demolding and drying. 2. A template in which an iron plate or a stainless plate is adhered and integrated to the back surface of a fiber reinforced plastic template part having a concave-convex pattern on the surface and reference strips for detection in the longitudinal and lateral directions of the surface, respectively. After placing the fiber reinforced cement raw material on the template surface and then heat-curing it under pressure,
A method for producing a cement board with a relief pattern, which comprises demolding and drying.