JPS62292687A - Manufacture of gradation pattern tile - 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 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for manufacturing gradation pattern tiles. A gradation pattern is a colored pattern that has portions in which the tone gradually changes from a dark portion to a light portion within a colored region of the same color.

[Prior Art] Conventionally, in the production of gradation pattern tiles, as shown in FIG.
When spraying the paint 4 using the nozzle 3, the spraying time is controlled and/or the moving speed of the nozzle 3 is controlled, etc., so that the color tone is as shown in FIG. 3(B). After painting a pattern 5 in which the color gradually changes from a dark part 5a to a light part 5b, the tile is fired at an appropriate temperature to obtain a gradation pattern tile (not shown). In addition, different methods of painting other than suffu and -kake are printing methods (e.g., screen printing method) using a shading pattern painting plate (e.g., screen plate or intaglio) consisting of halftone dots or sand grains. Alternatively, there is a method of painting a shading pattern consisting of a collection of fine dots of paint using a pad printing method.

[Problem to be Solved by the Invention 1] However, the conventional method for manufacturing gradation pattern tiles has the following drawbacks.

(a) In the dispensing method by spraying shown in Figure 4 (AltBl), the spraying is controlled by time and the movement speed of the nozzle 3 is controlled to change the density of the pattern. Spraying results in noticeable fluctuations in the amount of paint, and the thinning rate is not constant.As a result, in the past, it was not possible to obtain a stable gradation pattern, resulting in very low yields in mass production. .

(t)l In addition, in the printing method using a painted plate, the pattern is formed by a collection of dotted paints consisting of halftone dots or grains, and therefore only a design lacking in depth can be obtained.

SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks, the present invention aims to provide a method for manufacturing gradation pattern tiles that has a high yield and provides a deep design.

[Means for solving the problem] A means for solving the above-mentioned problem is to print a shading pattern consisting of a collection of fine dots of paint on the tile base by a printing method using a shading pattern painting plate. In a manufacturing method for obtaining tiles with a gradation pattern by painting and firing the tile base, after the shading pattern is painted and before the gradation pattern is finished, the shading pattern is painted with a similar or similar color to the paint. The glaze was sprayed in particles that were even finer than the fine dots.

[Function] By spraying a glaze of a similar or similar color to the paint in the form of particles that are even finer than the fine dotted paint, the top surface of the fine dotted paint and Ultrafine glaze particles can be interspersed between adjacent fine dots of paint.

[Description of Examples] A method for manufacturing a gradation pattern tile according to the present invention will be described in accordance with the steps of the examples shown in FIGS. 1 to 3.

The first step, as shown in FIG. 1 (8), is to apply an underglaze 8 of a desired color to the surface of the tile base 7 using an appropriate glazing method such as spraying. The reason for applying the lower glaze is to prevent differences in coloration due to water absorption.

Note that this first step may be omitted.

The second step consists of assembling fine dots of paint 10a, 10a... (see second diagram) on the tile base 7, as shown in Figure fc]! It is to paint the light pattern 20. The shading pattern 1120 is printed using a screen printing method or a pad printing method. The screen printing method uses a screen plate 9 on which a shading pattern consisting of a set of halftone dots or grains through which the paint 10 passes is formed, as shown in FIG.
Do this using The screen plate 9 can be created according to the invention of Japanese Patent Application No. 61-24673, which was filed by the present applicant. That is, as shown in FIG.
40 to 100 dots every a, 12b, 12c, 12d
line/inch) or a grained contact screen (
A gradation positive (not shown) is created using a gradation positive (not shown).

Next, a plurality of dark and light positives are combined to obtain a composite positive 13, and one screen plate 9 is obtained from the composite positive 13. Note that the combined screen plate 9 is not used, and although illustration is omitted, each upper plate 12a, 12b
, 12c, and 12d, it is of course possible to create a screen plate for each shade positive and print each screen plate separately. The pad printing method is performed using an intaglio plate (not shown) consisting of a collection of minute recesses of different sizes corresponding to a shading pattern. This intaglio plate can also be manufactured using the synthetic positive 13.

In the third step, as shown in FIG. 1(D) and the second diagram, a glaze 16 of the same color or similar color to the paint 10 is applied onto the 'Ja light pattern 20 from the fine dotted paint 10a. Furthermore, spraying is performed in the form of extremely fine particles with an average diameter of 10 to 150 μm.
A masking plate 14 with an opening 14a of a size necessary for spraying is placed on the tile base 7, and the spraying is carried out by moving the nozzle 15 at an appropriate speed.
A substantially uniform amount (for example, 50 to 5
00 gr/m”).In addition, glaze 16 is
It is preferable to use a material having a melt viscosity lower than that of the paint 10 and a reactivity higher than that of the paint 10.

The fourth step is the shading pattern 2, as shown in the enlarged view of Figure 2.
Spray upper glaze 17 on top of 0 and glaze 16 or i
Apply an appropriate amount of glaze using ai-ke, etc. This upper glaze 17 glaze is
This is done to protect the glaze 16 sprayed in the third step and to add depth to the design.
This will be done as necessary.

In the fifth step, the tile base 7 that has gone through the first to fourth steps is fired at an appropriate temperature to obtain a gradation pattern tile 18 as shown in FIG. 2(B).

Regarding the glaze 16 used in the third step,
The melt viscosity is lower than that of Paint 10 and the reactivity is that of Paint 10.
If a higher glaze is used, during firing, the ultrafine glaze particles 16', 16', etc. will not all melt into the fine dotted paint 108', and the adjacent y /l The fine dotted paint 10a' and the upper surface of the fine dotted paint 10a' are fired in a fine state as well as between the fine dotted paint 10a' and 10a'. As a result, the obtained tile 18 has the fired v1111 point-like paint 10a' scattered with extremely fine fired glazes 16', 16', etc., so that the dot-like paint 10a', 10a '... will no longer be emphasized, and the design will have more depth.

[Effects of the Invention] As detailed above, the method for manufacturing gradation pattern tiles according to the present invention has the following excellent effects.

■ A state in which glaze particles, which are similar or similar to the color of the fine dotted paint and are even finer than the fine dotted paint, are scattered on the top surface of the fine dotted paint on the tile base and between the adjacent fine dotted paint. Since the tile is fired with a gradation pattern, even when the shading pattern is viewed up close, there is no impression that it is a collection of dots such as halftone dots or sand grains, resulting in a tile with a gradation pattern that has a deep design.

■ When spraying the glaze on the shading pattern, it is sufficient to spray it uniformly, ensuring stable spraying.

As a result, by combining stable glaze spraying with a stable printing method using a painted board, it is possible to stably obtain a gradation pattern with a predetermined shade change, and the yield can be improved in mass production.

[Brief explanation of drawings]

1 to 3 show an embodiment of the method for manufacturing gradation pattern tiles according to the present invention. 2 is an enlarged sectional view showing the state before firing, FIG. 3 is an enlarged sectional view showing the state after firing, FIG. Al(
B) is a perspective view illustrating a conventional method for manufacturing gradation pattern tiles. 1...Tile base 9...Benefit board 10...
Paint 10a...Fine dot-like paint 20...
Shade pattern 16...Glaze 18...Gradation pattern tile Patent applicant Inax Co., Ltd. Agent Patent attorney 1) Toshihiko No. 2r/J Figure 3

Claims (1)

[Claims] 1. A gradation pattern is created by painting a shading pattern consisting of a collection of fine dots of paint on a tile base by a printing method using a shading pattern painting plate, and firing this tile base. In the manufacturing method for obtaining a tile, after painting the shading pattern and before firing, a glaze of a similar color or a similar color to the paint is applied on the shading pattern in a manner that is even more extreme than the fine dot-like paint. A method for producing tiles with a gradation pattern characterized by spraying them in the form of fine particles. 2. The method for producing a gradation pattern tile according to claim 1, wherein the glaze has a lower melt viscosity than the paint. 3. The method for producing a gradation pattern tile according to claim 1 or 2, wherein the tile base is pre-applied with an underglaze. 4. The method for producing a gradation pattern tile according to claim 1, 2 or 3, wherein the printing method is screen printing or intaglio pad printing.