JPS5978970A - Manufacture of ceramic 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 The present invention relates to a method of manufacturing ceramic panels.

Conventional pottery uses raw materials mainly made of clay, and is manufactured by molding and drying the raw clay, firing it, then applying a glaze to its surface, and firing it again.

This method is the same when producing ceramic panels, in which clay is first formed into a panel shape, dried, and then fired. However, clay before firing is extremely brittle, so if you try to make a large panel, it is difficult and requires a lot of work to transport the molded clay slabs into the kiln, and the clay shrinks by about 10% when it is shaped and dried. Since it shrinks by about 10% during firing, there is a problem that shrinkage cracks will occur during firing when large panels are fired, and there is a limit to the size of the product that can be manufactured, making it difficult to manufacture larger panels. could not.

This invention proposes a method by which large ceramic panels can be manufactured easily and inexpensively by using a mixture of sand and glaze instead of clay.

That is, this invention proposes a method for producing ceramic panels, which is characterized in that a dry sand grain-like raw material made of a uniform mixture of raw iron and glaze is spread on a shelf surrounded by a form and fired. It is something. Although various types of sand can be used as the raw iron, particularly good results are obtained when pumice sand with a high silicic acid content is used, and a ceramic plate with a glassy and dense structure can be obtained.

To further explain this with reference to Examples, 15 parts by weight of pumice sand with a high silicic acid content is mixed well with 1 part by weight of glaze dissolved in water, and the mixture is dried to obtain a raw material in the form of sand grains.

The reason why the glaze is dissolved and mixed with water is to uniformly mix the raw material iron and yuzu mulberry.The glaze is dissolved with water and then dried to form a fine powder, and this is mixed well with the dried raw material iron. Similar raw materials can also be obtained by On the other hand, as shown in Fig. 1, bricks 2 are placed in a frame shape on a shelf board 1 for firing pottery to form a formwork, and talc and alumina are applied as mold release agents to the inner surface of this formwork and on the shelf board. The mixture is applied and the aforementioned raw material 3 is spread on the shelf board surrounded by this mold. It is preferable that the inner wall surface of the brick 2 serving as the formwork be reversely tapered as shown in FIG. 2 for reasons described later. In addition, if you want to obtain a ceramic plate with a smooth surface, the raw material on the shelf board 1 should be smooth.
Needless to say, if it is desired to obtain a ceramic plate with an uneven surface, it can be spread out with a corresponding uneven surface.

A ceramic panel is obtained by putting the thus-spread raw material together with shelves and molds into a kiln and firing at a temperature of 1,000 to 1,300 degrees Celsius for 15 to 18 hours.

When pumice sand is used as the raw material iron, the thickness of the resulting panel is approximately 172 mm thick, which is the thickness of the raw material spread on the shelf due to shrinkage during firing. The shrinkage in plan dimensions is less than 2 percent. A colored glaze is applied to the surface of the ceramic panel thus obtained and fired again to obtain a ceramic plate having a desired pattern or color.

Another method of applying colored glaze to the surface of a ceramic plate is to sprinkle finely powdered colored glaze on the surface of raw material 3 spread on shelf board 1.
Ceramic plates with colored glazes can also be obtained by multiple firings. As mentioned above, the thickness of raw material 3 shrinks during firing, so
By making the inner surface of the brick 2 inversely tapered, a gap 5 is created between the fired ceramic plate 4 and the brick 2 as shown in FIG. 2, so that the ceramic plate 4 can be easily released from the mold. Become. This is particularly advantageous and advantageous since it is possible to avoid adhesion of the molten colored glaze 6 to the bricks 2 when the colored glaze 6 is sprinkled on the surface of the raw material 3 and fired.

According to this method, panels of any size can be easily fired as long as they are within the size of the kiln, and the silicic acid content and glaze in the crushed raw materials are fired to create a dense ceramic plate. There is no shrinkage cracking during firing, and especially when pumice sand is used as the raw material iron, it is possible to obtain a ceramic plate having a vitreous, translucent, and dense structure.

Furthermore, the ceramic plate thus obtained can be cut into desired dimensions using a diamond cutter or the like.

The surface texture of the resulting ceramic plate can be made smooth, rough, or uneven depending on the particle size of the raw iron and the glaze applied to the surface, making it extremely suitable as a ceramic plate for use in decorating walls of buildings, etc. .

As explained above, the method for manufacturing a ceramic panel of the present invention is as follows:
This method is characterized by the fact that a dry sand grain-like raw material made of a uniform mixture of raw material iron and glaze is spread on a shelf surrounded by a formwork and fired, making it possible to easily and shrink large ceramic panels. It can be manufactured without cracking, and has the effect of providing inexpensive large ceramic panels used for decoration of walls of buildings, etc.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional perspective view showing the state of raw materials spread on a shelf board, and FIG. 2 is a cross-sectional view showing the relationship between the fired ceramic plate and the mold. In the figure, 1 is a shelf board, 2 is a brick, 3 is a raw material, and 4 is a ceramic board. Agent Patent Attorney Takao Nishi

Claims (2)

[Claims] (1) A method for manufacturing a ceramic panel, which is characterized by spreading a dry sand grain-like raw material, which is a uniform mixture of raw iron and glaze, on a shelf surrounded by a formwork and firing it. (2) The method for manufacturing a ceramic panel according to claim 1, wherein pumice sand is used as the raw material iron.