JPH04275989A - Production of ceramic products - Google Patents

Abstract

PURPOSE:To render the subtle pattern of natural stone having an appearance of depth to a ceramic products by a relatively simple method. CONSTITUTION:A pattern forming material 1 contg. a light-transmissive raw material is granulated, and the granulated material is placed on the base 2 of ceramic products, press-formed and then fired. Since the product is integrally fired with the developed granulated material, the formed surface pattern and the base are integrated, and a more natural pattern is rendered to the products.

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 natural stone pattern on the surface of ceramic products such as tiles and ceramic plates.

0002

[Prior Art] Traditionally, surface patterns have been formed on ceramic products such as tiles by applying special glazes or by printing, but in recent years, there has been a need for surface patterns on ceramic products such as tiles. has diversified, and methods for creating special patterns have been developed, for example, in Japanese Patent Application Laid-Open No. 63-17.
It is disclosed in Japanese Patent Publication No. 8043, Japanese Patent Publication No. 2-8883, etc.

However, it is extremely difficult to create a natural stone-like surface pattern on such ceramic products, and there is a problem in that the depth unique to natural stone cannot be expressed.

[0004] Furthermore, there are restrictions on the shape and size of granules for unglazed tiles.

[0005]

OBJECTS OF THE INVENTION The problem to be solved by the present invention is to find a means for expressing the deep and delicate patterns of natural stone in a relatively simple manner.

[0006]

[Means for Solving the Problems] The present invention involves granulating a translucent pattern-forming material, flattening the granulated material if necessary, and then placing it on the base of a ceramic product and processing it. It is characterized by being pressed and then fired. Furthermore, the surface of the ceramic product may be polished after firing.

[0007] By preparing raw materials with flat grains, it is possible to obtain ceramic products with different color tones of surface patterns.

[0008] As raw materials for pattern forming materials having translucency, materials containing relatively little coloring components such as iron or titanium are used.
Containing pottery stone, feldspar, and kaolin, if necessary, clay or a solvent such as talc, bone ash, dolomite, etc. can be added, and this base material also contains pigments that make up the color tone of natural stone. can be mixed arbitrarily.

The pattern forming material contains 10 to 50 parts by weight of pottery stone, 25 to 60 parts by weight of feldspar, and 15 to 40 parts by weight of kaolin, and if necessary, up to 5 parts by weight of clay or 5 parts by weight of a solvent. It is preferable that the following be added to the product from the viewpoint of transparency and moldability of the product.

Furthermore, Fe2O contained in the pattern forming material
3. It is preferable that the TiO2 content is 3% by weight or less. This is because if the content exceeds 3% by weight, the base material becomes more likely to become colored.

[0011] The particle size of the pattern forming material is 0.1 to 2% in 250 mesh residue (63 μm sieve residue), 30
3-6% with 0 mesh residue (residue on 45μm sieve)
degree is preferred.

On the other hand, the particle size of the base material of ceramic products is 2
50 mesh residue (remaining on 63 μm sieve) 1 to 5
%, 5 with 300 mesh residue (remaining on 45 μm sieve)
About 15% is preferable.

[0013]

[Operation] The translucent material contained in the granulation base becomes connected between each granule during the firing stage, and the overlapping of the granules and the color gradation of the granules themselves are similar to those of natural stone. It forms irregular translucent areas, contributing to the creation of a subtle depth as a natural stone. Here, color gradation refers to the blurring and shading of colors. In addition, this semi-transparent material is not simply scattered and placed on the ceramic product, but by using it as a granule, it can be layered and then developed by applying pressure, etc., to create a pattern that is developed in close contact with the base surface. Can be formed.

[0014]

[Example] Example 1 FIG. 1 is a diagram showing an aspect of this embodiment.

[0015] As shown in the figure, white pigment base material powder consisting of 30 parts by weight of chinastone, 35 parts by weight of feldspar, 35 parts by weight of kaolin, and 1 part by weight of bone ash was granulated using a spray dryer, and had an average particle size of 0.3 mm. Granulated powder 1 was sprinkled loosely on a tile base 2 consisting of 37 parts by weight of clay, 14 parts by weight of chinastone, 49 parts by weight of feldspar, and 4 parts by weight of blue pigment. After dry molding with a press pressure of 350 kgf/cm2,
It was baked at ~1300°C for 1 hour. As a result, it was possible to obtain a tile having a semi-gloss surface pattern in which a white pattern was formed in the shape of a cirrus cloud on a blue non-glossy base surface.

Example 2 FIG. 2 is a diagram showing an aspect of this embodiment.

14 parts by weight of pottery stone, 49 parts by weight of feldspar, 3 parts by weight of clay
A tile base material consisting of 7 parts by weight was ground into spray granules with an average particle size of 0.4 mm, and the tile base material 2 was charged into the lower part of a press mold.

Separately, 30 parts by weight of chinastone, 35 parts by weight of feldspar,
In addition, a white pigment base material consisting of 35 parts by weight of kaolin,
In order to promote vitrification during melting, 1% bone ash or 3% talc was added externally, and the mixture was made into a slurry and dehydrated using a filter press to adjust the water content to 15%. Furthermore, 3% of the brown pigment was added to the total amount, and after kneading to the extent that the pigment was unevenly present, the size of the granules was flattened using a rolling mill, with a diameter of 2 mm to 50 mm, and water content. Rate 7~
A 10% flat granulated powder 1 was prepared.

In this example, it is not only the bone ash and talc that promote vitrification during melting;
There is no problem in using dolomite or the like.

This flat granulated powder 1 is filled onto the tile base 2 loaded in the lower part of a press mold, and after being molded in an upper rubber type press at a press pressure of 350 kgf/cm2, it is placed in an RHK furnace (roller hearth kiln). It was baked at 1250°C for 1 hour.

[0021] As a result, it was possible to obtain a tile having a marble-like uneven surface pattern in which white was developed in a mosaic style while changing its color tone on a brown pigment base. Furthermore, by grinding this surface, we were able to create a glossy, natural-looking marble pattern.

Example 3 A tile base material consisting of 14 parts by weight of chinastone, 49 parts by weight of feldspar, and 37 parts by weight of clay was crushed into spray granules, which were charged into the lower part of a press mold.

[0023] Additionally, 20 parts by weight of pottery stone and 60 parts by weight of feldspar
In order to promote vitrification during melting, 1% by weight of dolomite is externally added to a white pigment base material consisting of 15 parts by weight of kaolin and 5 parts by weight of clay to form a slurry.
It was made into spray granules. Add this and 2 parts by weight of the black pigment to an Eirich mixer, and mix with a water content of 10 to 15% and a diameter of 1 to 5 mm.
It was granulated into spherical shapes.

[0024] Separately, the white pigment base was put through an Eirich mixer, and the water content was 10 to 15%, and the diameter was 1 to 5 mm.
It was granulated into spherical shapes. After mixing these properly, using a rolling machine, the thickness is 0.8 to 1.2 mm and the size is 2 mm.
Obtain flat granules of ~50 mm, with a moisture content of 7 to 10%.
Adjusted to. The flat grains were placed on the tile base 2 at the bottom of the mold to a thickness of 4 to 8 mm as shown in Figure 2, and after dry molding using a rubber mold at a press pressure of 350 kgf/cm2, the tile surface became transparent. Glazed, 1250 at RHK
It was baked at ℃ for 1 hour.

[0025] As a result, it was possible to obtain a tile having a marble-like uneven surface pattern in which white was developed in a mosaic style while changing its color tone on a gray pigment base. Furthermore, by grinding this surface, we were able to create a glossy, natural-looking marble pattern.

[0026]

[Effects of the Invention] The following effects can be achieved by the present invention.

(1) The pattern-forming material having translucency is granulated, the granulated material is placed on the base of the ceramic product, and the granulated material is pressure-molded and then fired, so that the developed granulated material The resulting surface pattern is integrated with the base material, making it possible to create a pattern that is closer to nature, making it possible to obtain a ceramic product with an unprecedented natural stone-like surface pattern. can.

(2) Since a pattern-forming material with translucency is used, a deep texture can be obtained, and the translucency and glossiness can be easily controlled by adjusting the thickness. can.

(3) By overlapping with the substrate on the lower surface, it is possible to make the product surface multicolored.

[Brief explanation of the drawing]

FIG. 1 shows a first embodiment of the present invention, showing a state in which granules are sprinkled on a tile base.

FIG. 2 shows aspects of second and third embodiments of the present invention, showing a state in which flat granules are laminated on a tile base.

[Explanation of symbols]

1 Granulated powder 2　Tile base

Claims (3)

[Claims] [Claim 1] A pattern forming material having translucency is granulated,
A method for producing a ceramic product, which comprises placing the granulated material on a base of the ceramic product, press-molding it, and then firing it. [Claim 2] Granulating a pattern forming material having translucency,
A method for manufacturing a ceramic product, which comprises placing the granulated material on a base of the ceramic product, press-molding it, firing it, and further polishing the surface. 3. The pattern forming material includes 10 to 50 parts by weight of chinastone, 25 to 60 parts by weight of feldspar, and 15 to 40 parts by weight of kaolin.
3. The method for producing a ceramic product according to claim 1, further comprising 5 parts by weight or less of clay or 5 parts by weight or less of a solvent.