JPH0121117B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a decorative surface that looks like an inlay by making a glaze for a pattern with a clear outline exist inside a glaze layer formed as a base. The present invention relates to a new manufacturing method for obtaining ceramic products having the following properties.

[Prior art and its problems]

Conventionally, printing methods, penetration printing methods, and the like have been used to form a decorative surface by polymerizing a plurality of types of glazes on the surface of a ceramic green body molded body. FIG. 3 is a side sectional view showing a tile 4 with a decorative surface formed by the printing method. Further, FIG. 4 is a side sectional view showing a tile 4 having a decorative surface formed by a conventional penetrating printing method. As shown in both figures, the tile 4 is produced by glazing the base shaft 5 on the surface of the tile base 4' using the conventional printing method and the penetrating printing method, and further applying the upper glaze 6 on the upper surface of the base glaze 5. It was polymerized and glazed and then fired. As can be seen from the above two figures, these printing methods and penetrating printing methods are achieved by fusing the base glaze 5 and the top glaze 6 during firing.
The idea was to create a so-called shading pattern in which the color and shape were blurred at the outline of the top glaze to express an aesthetic exterior design.

On the other hand, there is still no practical method for clearly highlighting the outline of the upper glaze 6 in the base glaze 5 to create a beautiful pattern after firing.

[Means for solving problems and their effects]

The means adopted by the present invention to solve the problems of the prior art is to prepare a transparent glaze that becomes transparent after firing and a colored glaze, and to prepare a transparent glaze and a colored glaze, which have a higher melting temperature and which melt at the same temperature. The one with the higher viscosity in the state is selected and used as the pattern glaze, and the other is used as the base glaze, and the base glaze is applied to the surface of the ceramic green molded body to form a glaze layer of a predetermined thickness, and the upper surface of the glaze layer is Alternatively, a pattern of an arbitrary shape is drawn by applying the above-mentioned pattern glaze to a part of the lower surface, and then this glazed green body molded body is fired at a temperature that softens and melts the above-mentioned pattern glaze, and during the firing. A clearly outlined pattern is created inside the glaze layer by utilizing the difference in softening speed and melt viscosity between the pattern glaze and the colored glaze.

As mentioned above, the pattern glaze used in the practice of the present invention has a higher softening temperature than the basic glaze. Firing is performed at a temperature at which the pattern glaze softens and melts. Therefore, during the firing process, the basic glaze softens first, so the unsoftened pattern glaze applied to the top of the basic glaze layer tends to settle into the softened basic glaze, and then the pattern glaze softens. At the time of softening and melting, the upper surface of the pattern glaze and the upper surface of the basic glaze are flush and smooth. In addition, the pattern glaze applied to the underside of the basic glaze is
It remains buried in the basic glaze from beginning to end. Moreover, under the same temperature melting state, the glaze for the design has a higher viscosity than the base glaze, so the two do not fuse together at the contact interface, and the patterns drawn with the glaze for the design have clear outlines. It holds well, giving it the appearance of an inlay. Furthermore, since either the basic glaze or the pattern glaze becomes transparent after firing, the patterns drawn with the pattern glaze inside the glaze layer of the basic glaze are embellished and add depth.

〔Example〕

The present invention will be described below based on drawings showing embodiments thereof.

FIG. 1 is a side sectional view of a ceramic product (tile) 1 manufactured by the method of the present invention. Ceramic product 1 manufactured by the method of the present invention as shown in the figure
The decorative surface 1a has inside the glaze layer formed by the basic glaze 2,
It is formed so that there is a pattern glaze 3 with a clear outline.

The method of the present invention is carried out as follows. first,
A transparent glaze that becomes transparent after firing and a colored glaze are prepared. In this example, 60% by weight of frit was added to the transparent glaze.
and 40% by weight of feldspar was used. The transparent glaze has a Segel cone number of SK5a to SK6a. In addition, the colored glaze is made of Fritz 100% by weight and Vehicle 65%.
% by weight was used. The colored glazes have Segel cone numbers SK4a to SK5a.

Generally, it is well known that materials with a high melting temperature also have a high melt viscosity. Therefore, when these transparent glazes and colored glazes are compared based on their Segel cone numbers, it can be seen that the melt viscosity of transparent glazes is higher than that of colored glazes. Therefore, in this example, the transparent glaze was used as the pattern glaze 3, and the colored glaze was used as the basic glaze 2.
The basic glaze 2 is used by adjusting its coefficient of thermal expansion to match that of the green molded body 1 to be welded.

Next, the basic glaze 2 is applied to the surface of the green body molded body 1' by a curtaining method. The green molded body 1'
is a square-shaped tile base with a side of 150 mm and a thickness of 7 mm. The amount of basic glaze 2 used was 26g, and the thickness of the glaze layer was 0.6mm.
It became. Thereafter, a pattern glaze 3 was applied to a thickness of 0.5 mm on the upper surface of the glaze layer of the basic glaze 2 by screen printing.

This is the temperature at which the pattern glaze 3 begins to soften and melt the green body molded body 1' glazed as described above.
It was baked at 1180℃ for 36 hours. During firing, the basic glaze 2 made of colored glaze softens first, so the pattern glaze 3 applied to the upper surface of the glaze layer gradually settles into the basic glaze 2 layer. Next, the pattern glaze 3 is softened, and eventually both the basic glaze 2 and the pattern glaze 3 are in a molten state, and their upper surfaces are smoothed flush. However, because the viscosity of the pattern glaze 3 is higher than that of the basic glaze 2, the two glazes do not fuse at the mutual contact interface, and the patterns drawn with the pattern glaze 3 maintain clear outlines. do. Moreover, in the case of general glass, the higher the softening temperature, the lower the thermal expansion coefficient, so the patterns drawn with the pattern glaze 3, which softens later, retain their original shape, and this makes the outline clearer. This makes it even more useful.

The ceramic product 1 obtained in this way has a transparent pattern glaze 3 with a clear outline inside the glaze layer of the basic glaze 2 made of colored glaze formed on its surface.
An inlay-like decorative surface 1a was formed in which a was embedded.

(Study of another aspect) As another manufacturing method, as shown in FIG. A glaze layer of the basic glaze 2 may be formed on the upper surface. In this case, contrary to the above embodiment, a transparent glaze was selected as the basic glaze 2, and a colored glaze was selected as the pattern glaze 3. In this example, the pattern glazes 3 made of colored glazes are scattered as described above because the pattern glazes 3 have a lower softening and melting temperature than the basic glaze 2, and their expansion coefficients are also necessarily lower. This is to keep the amount of expansion during softening and melting to a small amount.

During firing, the amount of expansion of the scattered pattern glazes 3 is small, and the pattern glazes 3 are confined by the base glaze 2, which has a high melt viscosity. The drawn pattern etc. will not be deformed and will maintain a clear outline. Therefore, in this embodiment, dotted pattern glazes 3 made of colored glazes are present inside a transparent glaze layer made of basic glaze 2 to create an inlaid decorative surface 1a on which an arbitrary pattern or the like is drawn.
can be obtained.

In this way, the detailed configuration of the method of the present invention can be changed as appropriate depending on the mode of implementation.

〔Effect of the invention〕

As is clear from the above explanation, the decorative surface of the ceramic product manufactured by the method of the present invention is such that the pattern glaze remains inside the glaze layer made of the basic glaze with its outline clearly maintained. Moreover, its condition can be confirmed through the transparent base glaze or pattern glaze, so in those who look at it, the patterns created by the pattern glaze create a sense of beauty as if they were inlaid.

Furthermore, since the ceramic product according to the manufacturing method of the present invention has a decorative surface in which a transparent glaze and a colored glaze intersect, the patterns drawn thereon have a deep rich color as a whole, and are light-colored. There is a subtle change in the taste depending on how it is hit, making it even more elegant.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a ceramic product manufactured by the method of the present invention, and FIG. 2 is a side sectional view of a ceramic product manufactured by another embodiment of the manufacturing method of the present invention.
FIG. 3 is a side sectional view showing a tile manufactured by a conventional printing method, and FIG. 4 is a side sectional view showing a tile manufactured by a conventional penetration printing method. 1... Ceramic product, 1'... Green molded body, 1a
... Decorative surface, 2... Basic glaze, 3... Glaze for patterns.

Claims (1)

[Claims] 1. Prepare a transparent glaze that becomes transparent after firing and a colored glaze, select the one with a higher melting temperature and higher viscosity in the same temperature melted state between the transparent glaze and the colored glaze, and use the other as the glaze for the design. The basic glaze is applied to the surface of a raw material molded body for ceramics to form a glaze layer of a predetermined thickness, and the pattern glaze is applied to a part of the upper or lower surface of the glaze layer to form a pattern of an arbitrary shape. The glazed green body molded body is then fired at a temperature that softens and melts the pattern glaze, and the difference in softening speed that exists between the pattern glaze and the colored glaze during firing is and a method for manufacturing a ceramic product having an inlaid decorative surface, which is characterized by making a clearly outlined pattern appear inside the glaze layer by utilizing the difference in melt viscosity.