JP2967838B2 - Ceramic products and their production method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic product having a novel pattern formed on the surface of a ceramic product such as a tile, a ceramic plate or the like, which is suitably used for an interior wall material of a building, and a method for producing the same.

[0002]

2. Description of the Related Art Hitherto, various methods for making an uneven pattern appear on the surface of ceramic products have been proposed in JP-A-56-50178 and JP-B-1-31476. A method of printing with a partial thickness of the ink, or a method of mixing large refractory particles in the glaze and firing, and a method of mixing the glaze with a foaming agent and partially sintering the base during firing. It is a method that is practically used, such as a method of foaming, a method of spot glaze in which glaze is partially applied, and a method of spray glaze.

[0003]

However, the surface irregularity pattern produced by the above-mentioned conventional method is generally unappealing in the case of a non-glazed pattern formed by printing because the pattern formed is too regular. In addition, the method of forming uneven patterns using glaze is not as good as the printing method, but the unevenness formed is macroscopically uniform, and at best, it is interesting because it combines with the change in color where spots and colors are mixed by multicolored glaze However, it cannot sufficiently meet the needs of forming complex irregularities under a single color. In addition, for that purpose, preparation of many types of glazes is required, and firing conditions must be complicated.

[0004] The problem to be solved in the present invention is to find a means that can respond to the need for the appearance of delicate surface patterns that are not present in conventional ceramic products because of the recent diversification of tastes for ceramic products.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a ceramic product having a ceramic product in which the surface of a base material of a ceramic product is formed unevenly with a glaze having a low firing viscosity, and a decorative glaze layer is unevenly distributed on one side of the convex portion. Product.

Another aspect of the present invention is a method of manufacturing a ceramic product, in which the surface of the substrate of the ceramic product is formed in an uneven shape, and the decorative glaze is applied unevenly on one side of the convex portion, followed by firing. It is.

Here, the decorative glaze layer may be provided only on one side of the convex portion, or a glaze layer relatively thicker on one side of the convex portion than on the other side. You may.

The uneven portion on the surface of the substrate of the ceramic product may be formed integrally with the substrate of the product by dry press forming,
It may be formed by applying a glaze on a flat substrate surface.

[0009] When the uneven portion on the surface of the base material is formed by glaze, a product having an uneven base material surface after firing can be obtained by forming it with a glaze having a high firing viscosity. Further, when the uneven portion on the surface of the base material is formed by glaze having a low firing viscosity, a product having a flat surface after firing is obtained.

In carrying out the present invention, a ceramic product having an uneven surface can be used as a ceramic product before glazing. The object can be achieved, and the present invention can be applied to ceramic products having an uneven surface both microscopically and macroscopically.

[0011] The angle of the glaze spray depends on the unevenness of the base.
Those having an inclination angle of 5 ° or less are preferable.

Further, in order to emphasize the uneven surface after spraying, it is preferable to use a relatively highly viscous glaze as a base glaze in order to prevent the surface after spraying from being flattened.

[0013]

[Function] By distributing decorative glaze unevenly on one side of the convex part of the ceramic product base material surface, color shading appears on both sides of the convex part, thereby forming a unique surface pattern You.

[0014]

EXAMPLE The present invention was applied to a normal tile to form a tile surface pattern having a fine uneven pattern.

Example 1 As shown in FIG. 1, an uneven surface having an average height difference (d) of about 1 mm was formed on the surface of a tile base (1) by press molding before firing of the tile base. As a glaze exhibiting a color different from the color of the tile base, 60 parts by weight of feldspar, 7 parts by weight of clay,
A glaze (3) consisting of 5 parts by weight of silica stone, 15 parts by weight of lime, 3 parts by weight of zinc white, 7 parts by weight of zircon and 3 parts by weight of a pigment, as shown in FIG. The actual glaze amount of 0.12 g / cm ² is sprayed at an inclination angle α of 30 degrees with respect to the surface of (1) to form a glaze layer (5) on one side of the convex portion of the substrate surface (2). did. This is heated at 1250 ° C. in a tunnel furnace in an oxidizing atmosphere for 2 hours.
It was baked for 0 hours.

As a result, as shown in FIG. 3, a tile having a smooth and irregular continuous uneven surface (7) on the glaze surface was obtained.

Example 2 As shown in FIGS. 4 and 5, before firing of the tile substrate, an uneven surface having an average height difference (d) of about 1 mm was formed on the surface of the tile substrate (1) by spray glaze. In this case, a glaze for the base was composed of 95 parts by weight of feldspar, 5 parts by weight of clay, 15 parts by weight of zircon, and 2 parts by weight of pigment.

As a glaze having a color different from the color of the tile base, 60 parts by weight of feldspar, 7 parts by weight of clay, 5 parts by weight of silica stone,
Lime 15 parts by weight, zinc white 3 parts by weight, zircon 7 parts by weight,
Then, as shown in FIG. 6, the glaze (3) consisting of 3 parts by weight of the pigment was used, and the inclination angle α from the spray nozzle (4) to the surface of the base glaze layer (6) was 30 degrees as shown in FIG. 0.12
g / cm ² was sprayed to form a glaze layer (5) on one side of the convex portion of the substrate surface (2). This was fired at 1250 ° C. for 20 hours in a tunnel furnace in an oxidizing atmosphere.

As a result, as shown in FIG. 3, a tile having a smooth and irregular continuous uneven surface (7) on the glaze surface was obtained.

Example 3 83 parts by weight of feldspar as a white glaze having a low viscosity at the sintering temperature was applied to the baked flat tile base (1) shown in FIG.
A glaze consisting of 7 parts by weight of clay, 10 parts by weight of zircon and 3 parts by weight of white pigment was spray-glazed to form an uneven base glaze layer (6) having a maximum depth of 1 mm as shown in FIG. As shown in FIG. 6, feldspar 60 parts by weight, clay 7 parts by weight, silica stone 5 parts by weight, lime 15 parts by weight, zinc white 3 parts by weight, zircon 7 parts by weight, and A glaze (3) consisting of 3 parts by weight of a pigment is sprayed from the spray nozzle (4) to the surface of the base glaze layer (6) at an inclination angle α.
To 30 degrees and spray the actual amount of glaze 0.10 g / cm ² to form a glaze layer (5) on one side of the convex part of the surface of the base glaze layer (6). At 1250 ° C. for 20 hours.

As a result, a tile having a flat surface was obtained as shown in FIG.

[0022]

According to the present invention, the following effects can be obtained.

(1) A new texture similar to a marbling or scale-like pattern can be obtained on the surface of a ceramic product.

(2) The present invention can be applied while utilizing various conventional color tones and colors.

(3) A ceramic product having a glossy surface having gradual and irregular continuous irregularities can be obtained.

(4) Since the obtained product has smooth irregularities, the surface has a different color tone depending on the viewing direction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a tile base applied with irregularities on a surface applied in a first embodiment.

FIG. 2 shows an embodiment in which glaze is sprayed onto the surface of the tile base of FIG. 1 in an uneven manner.

FIG. 3 shows a surface state of a tile obtained by the first and second embodiments.

FIG. 4 shows a surface state of a tile before forming an uneven base glaze layer on a tile base surface as a second and a third embodiment.

5 shows a state in which an uneven base glaze layer is formed on the surface of the tile base of FIG. 4;

FIG. 6 shows a state in which glaze is sprayed on the convex portions of the base glaze layer of FIG.

FIG. 7 shows a surface state of a tile obtained according to the third embodiment.

[Explanation of symbols]

 Reference Signs List 1 tile base 2 tile base surface 3 spray glaze 4 spray nozzle 5 spray glaze layer 6 base glaze layer 7 continuous uneven surface

Continuation of front page (72) Inventor Yoshimitsu Saeki 304-701, Nishiyama, Shimoishi-cho, Toki-shi, Gifu Prefecture Tohki Kiki Co., Ltd. Gifu Tile Center (56) References JP-A-3-295874 (JP, A) Hei 3-125132 (JP, U) Japanese Utility Model Showa 62-75151 (JP, U) Japanese Utility Model Showa 59-33731 (JP, U) (58) Fields studied (Int. Cl. ⁶ , DB name) C04B 41 / 00-41/91

Claims (4)

(57) [Claims] 1. A ceramic material having a low firing viscosity on a substrate surface of a ceramic product.
A ceramic product characterized by being formed into irregularities with a medicine and having a decorative glaze layer unevenly distributed on one side of the convex portion. 2. A glaze having a low firing viscosity on a substrate surface of a ceramic product.
A method for producing a ceramic product, comprising applying a chemical to form a base material surface in an uneven shape, applying uneven glaze to one side of the convex portion, applying a decorative glaze, and then firing. Wherein the formation of uneven substrate table surface of the ceramic product
And apply a glaze for decoration on one side of the convex
Method for producing a ceramic product which is unevenly distributed subjected blowing inclination angle 5 to 45 degrees below, characterized in Rukoto. 4. The substrate surface of a ceramic product is formed in an uneven shape.
And apply a glaze for decoration on one side of the convex
After spraying at an inclination angle of 5 to 45 degrees or less and unevenly distributed, firing
A method of manufacturing a ceramic product, which comprises: