JPH0123431B2 - - Google Patents

Description

Detailed Description of the Invention The present invention uses a unique material formulation, glaze, and unique shape to create a so-called tile-like product with excellent surface durability, surface gloss, overall hardness, heat resistance, and weight reduction. The present invention relates to a new glazed mineral extrusion product which is made into what are called panels.

Conventionally, when surface-finishing a cement product to obtain a tile-like panel, it was usual to use a paint finish. However, paint is weather resistant,
Due to poor abrasion resistance or chemical resistance, the painted surface of cement products often changes color and fades over time, causing aesthetic problems.
Another conventional method is to pour a cement mixture into a mold to form it into a desired shape.
It is known that a phosphoric acid-based frit glaze is applied to a hardened cement product obtained by hydration hardening, and then fired at a low temperature of 650°C or less to fuse the glaze to the surface of the hardened cement product. be. However,
In this case, the above-mentioned phosphoric acid-based glaze has the disadvantage that it is not only inferior in light resistance and chemical resistance to the commonly used glazes, but also very expensive, and the quality of the product is also poor. Therefore, it was not very practical.

Therefore, in Japanese Patent Application No. 52-87196 (Japanese Patent Publication No. 56-45464), the present applicant proposed a method of applying a glaze finish to the surface of a cement molded product. However, in the case of a thin plate-shaped body, there was a problem in that the finished product warped due to the difference in expansion coefficient between the glaze and the cement molding during firing. For this reason, as a way to eliminate this warpage, the wall thickness of the cement molded body was made extremely thick, but this
This time, the weight increased, which could be a fatal flaw as a building material.

In view of the above-mentioned drawbacks of the conventional art, the present invention has been improved and eliminated, and consists of 100 parts by weight of cement, 1 to 3 parts by weight of thickener, 4 to 6 parts by weight of inorganic fibers, silica sand, crushed sanitary ware, etc. 50 to 150 parts by weight of refractory aggregate,
An uneven pattern is provided on one or both sides of a substrate obtained by extruding a kneaded raw material composition consisting of 25 to 40 parts by weight of water and conventional additives added as desired, and a glazed layer is formed on the protrusions. By drilling multiple through-holes inside the substrate, we provide a glazed inorganic extrusion product called a so-called tile-like panel that has excellent surface durability, surface gloss, overall hardness, heat resistance, light weight, and strength. It is something that I try to do.

The cement used in the present invention can be arbitrarily selected from commonly used cements such as Portland cement, alumina cement, blast furnace slag cement, and mixed cement. In addition, as thickeners, methyl cellulose, ethyl cellulose,
Carboxymethyl cellulose, polyethylene oxide, vinyl alcohol, etc. are used, but
The best choice is methylcellulose. It is necessary to use this thickener in an amount of 1 to 3 parts by weight per 100 parts by weight of cement. If the amount is less than this, the plasticity will be insufficient, and if it is more than this amount, expansion or sagging will occur after extrusion, which is inappropriate. Next, as the inorganic fiber, inorganic fibers commonly used as reinforcing fillers such as asbestos, carbon fiber, and glass fiber can be used. This material provides lubricity to the raw material composition, facilitates extrusion, and plays a role in suppressing sagging after extrusion. This inorganic fiber contains 4 parts per 100 parts by weight of cement.
~6 parts by weight. If the amount is less than this amount, sagging will occur after extrusion molding, and if it is more than this amount, the composition will become too hard and extrusion will not be carried out smoothly, or depending on the type of inorganic fiber, it may cause sagging after extrusion molding. The strength may decrease significantly after firing. Further, as the aggregate, refractory aggregates such as silica sand and Schierben (magnetic shimozto) can be used. The appropriate particle size for this aggregate is 100μ
It is about 2 mm to 2 mm, and can withstand high temperatures of 850°C or higher (glaze firing temperature). Furthermore, the refractory aggregate has a content of 50 to 150 parts per 100 parts by weight of cement.
It is necessary to use within the range of parts by weight. If the amount is less than this, sufficient strength cannot be obtained, and if the amount is more than this, the raw material becomes too hard and difficult to extrude.

Examples of additives that can be added to the raw material composition as desired include water reducing agents, curing accelerators, curing retarders,
Colorants, etc.

The raw material composition used in the present invention is prepared by adding 25 to 40 parts by weight of water per 100 parts by weight of cement to the mixture of the above-mentioned components and thoroughly kneading the mixture. The amount of water required at this time can be increased or decreased depending on the additives used in combination, but if it exceeds this amount, sagging will occur, which is not preferable.

Next, the case of producing a glazed inorganic extruded product from the raw material composition kneaded as described above will be explained with reference to the drawings. First, the above raw material composition is mixed into a predetermined extrusion molding machine and extruded to continuously mold a cement molded product (substrate) 1 shown in FIG. The width W of the substrate 1, which is this specific example product, is 400 mm.
The thickness H is 25 mm. In the product of this example, the cross-sectional area can be reduced by 44.7% by simultaneously drilling a through-hole 2 with a width w = 86 mm and a height h = 13 mm in the center of the substrate 1 during extrusion molding. , excellent in weight reduction. In addition, it is possible to obtain a sufficient thickness so that no warping occurs during firing in the post-process.
The substrate 1 immediately after extrusion molding still retains sufficient plasticity, and a pattern of concave portions 3 and convex portions 4 as shown in FIG. 2 is press-molded by a roller (not shown) or the like. Incidentally, FIG. 2 shows a case where a concavo-convex pattern is provided on one side, but this may be provided on both sides. A glazed layer 5 is formed on the convex portion 4 as shown in FIG. The glaze for the glazed layer 5 may be, for example, a base consisting of glass powder and frit, to which commonly used auxiliaries such as zinc white or zircon are added, and further, if desired, an inorganic pigment is added. This glaze is applied to the substrate 1 by any method such as spray painting, dipping, or screening.

The substrate 1 glazed in this way is 650
After being fired for 5 to 180 minutes at temperatures ranging from ~900°C, it is rehydrated. Rehydration can be done by either underwater curing or steam curing; in the case of underwater curing, it is performed by immersing the product in water for several days to several tens of days at room temperature, and in the case of steam curing, it is carried out at 40 to 60°C for several hours to several tens of days. This can be carried out for several days or by holding for several hours under several atmospheric pressures in an autoclave.

The glazed inorganic extrusion product, so-called tile-like panel, obtained as described above is lightweight and thick, and does not warp or bend during glazing firing, making it possible to obtain a stable product. In addition, since it is fired at high temperature using refractory aggregate and rehydrated,
It has excellent strength, heat resistance, and durability, and the glazed layer 5 also has excellent durability and has a good surface gloss. Therefore, it has many advantages as a building material and is an important product.

FIGS. 4 to 7 each show other embodiments. The embodiment shown in FIG. 4 is an embodiment in which a convex strip 6 and a concave strip 7 for connection are provided on the side surface of the substrate 1, and the embodiment shown in FIG. 5 is an embodiment in which the concave strip 7 is provided on both sides of the substrate 1. The one shown in FIG. 6 is an example in which the through hole 2 of the example product shown in FIG. 4 is filled with a heat insulating material 8 such as foamed plastic, rock wool, glass wool, etc. to improve the heat insulation effect and the sound insulation effect. . Also the 7th
What is shown in the figure is an embodiment in which a reinforcing member 9 such as ordinary iron wire, steel wire, tempered wire, SUS wire, etc. is buried in the substrate 1 to further increase the strength. The other configurations, materials, etc. are the same as those of the embodiment shown in FIGS. 1 to 3, so their explanations will be omitted here.

In short, according to the present invention, it is possible to provide a glazed inorganic extruded product called a so-called tile-like panel, which has many advantages such as surface durability, surface gloss, overall hardness, heat resistance, weight reduction, and strength. , is an excellent building material.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view of the substrate immediately after extrusion, Figure 2 is a partial perspective view of the substrate of Figure 1 with an uneven pattern, and Figure 3 is a longitudinal cross-section of the substrate of Figure 1 with a glazed layer. 4 to 7 are longitudinal cross-sectional views of substrates showing other embodiments. 1... Substrate, 3... Concave portion, 4... Convex portion, 5...
Glazed layer, 2...through hole.

Claims (1)

[Claims] 1 100 parts by weight of cement, 1 to 3 parts by weight of thickener,
A kneaded raw material composition consisting of 4 to 6 parts by weight of inorganic fibers, 50 to 150 parts by weight of refractory aggregate such as silica sand and crushed sanitary ware, 25 to 40 parts by weight of water, and conventional additives added as desired. A glazed inorganic extruded product, characterized in that a concavo-convex pattern is provided on one or both sides of an extruded substrate, a glazed layer is formed on the convex portions, and a plurality of through holes are bored inside the substrate.