JPS61211439A - Production of inorganic building panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a method for producing building materials, particularly inorganic building boards.

(Background Art) The following materials have been proposed as inorganic construction material structures having decorative patterns on their surfaces.

(By printing, painting, etc. on the surface of the inorganic molded body,
Structure with a decorative pattern ←) Part of the interior of an inorganic molded body (one with an inorganic colored layer on the surface layer, or one with two or more different colored inorganic layer parts mixed randomly) A composition with a colored pattern on it.The composition with a decorative pattern in (a) is simply a pattern printed or painted on the top layer of the surface, so the surface layer will deteriorate over a long period of time. The pattern may disappear or the color may fade.

In addition, even if the structure in which a colored part is provided in a part of the interior of ← is relatively durable, the pattern on the surface layer gradually disappears and the color fades as in (a).

(Purpose of the invention) Even if the surface layer deteriorates after long-term use,
A structure in which the inside of the structure and the pattern on the surface side are continuously connected so that the decorative pattern on the surface appears continuously, and the pattern on the surface (side surface) of the structure has a substantially wood grain pattern. The purpose of the present invention is to provide a manufacturing method that allows relatively easy production of inorganic building boards.

(Disclosure of the Invention) By using the following production method, the desired inorganic cured product as described above can be obtained.

The first aspect of the present invention is to alternately feed two or more types of hydraulic inorganic materials of different colors to an extruder to extrude a substantially plate-shaped body, and then cut the surface or side surface of the molded product. The present invention relates to a method for manufacturing an inorganic building board characterized by the appearance of a roughly wood grain pattern.

The hydraulic inorganic material used in the present invention is not limited in any way, and may be those used in ordinary inorganic building materials. In other words, ordinary cements (various types of cement)
, slag, plaster.

These include calcium silicate, charcoal magnesium, and lime.

Organic fibers (pulp) can also be used as reinforcing fibers.

(vinylon, polyethylene, polypropylene, acrylic, etc.) and inorganic fibers (asbestos, rock wool, wollastonite, mica, etc.). Using the above materials as main raw materials, organic resins (
methylcellulose, polyacrylamide, polyvinyl alcohol, epoxy resin, acrylic emulsion). These children are not particularly limited, but the total solid content should be 1
When it is 00 parts by weight, it is usually 1 to i.

It is best to use it as much as possible.

Pigments for coloring are added to the above-mentioned materials, water is added, and the mixture is mixed and kneaded to prepare a colored kneader. (
In the present invention, the color of the pigment is changed and two or more types of such colored mixtures are prepared.) The pigments used here are generally the same inorganic pigments, but some organic pigments and dyes are used. etc. can also be used.

Two or more mixed wires thus adjusted are alternately fed to an extruder to extrude and mold a plate-shaped body.

FIG. 1 shows a perspective view of a plate-shaped molded product extruded from an extruder die. In the figure, 1 is an extruder die, 2 is a molded product take-up conveyor, and 3 is a molded product. FIG. 2 is an enlarged view of the plate-shaped molded body 3. As can be seen from the enlarged view in FIG. 2, when colored kneaded materials of different colors are alternately fed to the extruder and extruded, the colored layer at the end has a circular cross section (hereinafter referred to as a tree ring pattern). ] is continuously extruded. This is because the flow velocity of the material is different between the part in contact with the wall of the extruder die and the center part, and the flow velocity distribution has a A pattern appears.This annual ring pattern can be changed depending on the extrusion speed of the extruder.However, although it is possible to form a plate-shaped body with a cross-sectional pattern of annual rings in this way, as shown in Fig. 2. As is clear, the surface and side surfaces of the plate form a very thin colored layer of one color. (the colors of the two are mixed at the die part and become one color), it is not possible to obtain an inorganic plate-like body with a substantially wood grain pattern on the surface, which is the object of the present invention. The purpose of this invention is to obtain an inorganic plate-shaped body having a wood grain pattern, and for this purpose, in the present invention, the surface or side surface of the molded body is cut into thin slices.In this case, cutting is performed by curing the hydraulic inorganic molded body. There is no problem with cutting it either before or after, but considering the return (reuse) of the material, it is preferable to cut it immediately after molding and before curing. The surface and side surfaces of the molded body are shown as slices.There are no limitations on the curing method for the molded product of the present invention.Generally, curing methods for hydraulic inorganic materials such as leaving indoors, moist heat curing, autoclave curing, underwater curing, etc. The method adopted in can be applied.

Next, the second invention of the present invention will be explained.

The second invention is that when a substantially plate-shaped body is extruded by alternately (sequentially) feeding two or more hydraulic inorganic materials of different colors to an extruder, the plate-shaped body is placed inside the extruder die. This invention relates to a method for producing an inorganic building board that has a substantially wood grain pattern and is characterized by extrusion molding with a partition plate so that a part of the surface or side surface of the board is separated and extruded.

The present invention μ The material is prepared and extruded in the same manner as in the previous invention, but unlike the previous invention, the surface or side surface of the extruded product is not cut later, but during extrusion molding. This is a method in which the surface or side surfaces of the molded product are separated and taken out inside the die (mold), and if the whole method of the present invention is used, it is possible to cut the surface or side surfaces of the molded product later. It can be easily separated and is ideal for returning uncured inorganic materials for reuse. For this purpose, in the present invention, as shown in FIG. 5 and FIG.
Use die 4. That is, a partition plate (
Blade) 5 is provided. By extrusion molding using the die of the present invention, a plate-shaped body having a substantially wood grain pattern on the surface or side surface can be obtained as shown in FIGS. 6 and 8.

The hardening and curing method may be the same as described above.

(Example) Next, an example will be described.

Colored cross-wire materials were prepared using the blending ratios of Examples 1 to 6 as shown in Table 1. Next, this colored material was put into an extruder alternately, and the extrusion speed was 2 m/min, and the width was 15-1 mm.
A plate-like body with a thickness of 15 fins was extruded. Next, this molded body is ω
C. Humid heat curing was performed for 3 days at 100% humidity, and then left indoors for 2 weeks. Thereafter, the surface of the plate-shaped body was scraped by a hand vibrator to a thickness of about 2 cm, thereby obtaining an inorganic construction board having a substantially wood grain pattern on the surface. The physical properties of this product, as shown in Table 2, were excellent in strength and water resistance.

Next, colored mixed wire materials were prepared in the proportions shown in Examples 7 to 9 in Table 1, and alternately fed into an extruder, using the extrusion mold shown in FIGS. 5 and 7. Extrusion speed 1
A plate-shaped body having a width of 150 m and a thickness of 505 m+ was extruded at a speed of m7 minutes. Next, this molded body f, 80°C, 10091i
Humid heat curing was performed for 3 days under humidity, and then left indoors for 2 weeks. The surface or side surface of the obtained plate-like body had a substantially wood grain pattern. Further, as shown in Table 2, this product had excellent properties such as strength and water resistance.

(Effects of the Invention) As described above, by employing the manufacturing method of the present invention, an inorganic building board having a wood grain pattern as listed below can be obtained in an extremely simple manner.

B) Real books are also non-combustible, have good dimensional stability, and provide non-combustible wood with no risk of rotting.

(b) Items with patterns printed or painted on the surface are also very durable, and the pattern may fade over time.
An inorganic building board that does not have to worry about peeling can be obtained.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the extruder die and the extruded molded product;
Fig. 2 is an enlarged perspective view of the molded product, Fig. 3 is a cross-sectional perspective view taken along A-A' of the molded product in Fig. 2, and Fig. 4 is a B+B of the molded product in Fig. 2. Figure 5 is an extruder die with a partition piece (blade) installed inside, and Figure 6 is a cross-sectional perspective view when cut along /. Figure 6 is an extrusion molding using the extruder die shown in Figure 5. A perspective view, FIG. 7 shows an extruder die with a partition piece (blade) installed inside, and FIG. 8 shows a perspective view of extrusion molding using the extruder die of FIG. 7. 1... Extruder die, 2... Molded product take-up silicon conveyor, 3... Molded product

Claims (2)

[Claims] (1) Two or more hydraulic inorganic materials of different colors are alternately fed into an extruder to extrude a roughly plate-shaped body, and then the surface or side of the molded product is cut to create a roughly wood grain pattern. A method for manufacturing an inorganic building board characterized by making it appear. (2) When extruding a substantially plate-shaped body by supplying two or more hydraulic inorganic materials of different colors alternately (in order) to an extruder, the surface of the plate-shaped body or 2. A method for manufacturing an inorganic building board according to claim 1, characterized in that a partition plate is provided and extrusion molding is carried out so that a part of the side surface is separated and extruded, so that a substantially wood grain pattern appears.