JPH0791132B2 - Method for manufacturing thermal spray tiles - Google Patents

Description

The present invention relates to a method for forming a colorful pattern on the surface of a tile base material when the tile used as an interior or exterior material is manufactured by thermal spraying. Regarding

[Prior Art] Conventionally, tiles are generally coated with a glaze on a tile base material,
It is manufactured by firing for a long time in a furnace. However, it is difficult to efficiently manufacture a tile having a uniform and colorful pattern by this method with a small number of steps.

That is, the glaze applied to the tile base material to form the pattern has a different coloring state depending on the temperature conditions, and therefore, a single tile base material is coated with a plurality of types of glaze having different coloring temperature ranges of several hundred degrees. However, it is difficult to produce a tile having a desired pattern by firing once in a furnace. In the conventional method of firing in a furnace, the heating temperature cannot be adjusted locally, so it is necessary to repeat the application of glaze and firing (baking) several times to form patterns of different colors on one tile base material. However, the number of steps is increased, which is disadvantageous in terms of cost. Besides,
Since heating and cooling are repeated several times, there is a drawback that deformation and cracks are likely to occur due to thermal stress, and there is also the inconvenience that it is not possible to respond to on-site construction requests such as adjusting the color tone as needed at the construction site. The manufacture of such a glaze baking type tile having a colorful pattern by using a plurality of kinds of glazes has not been performed so far.

[Problems to be Solved by the Invention]

The present invention provides a method for producing a glaze baking type tile having a colorful pattern, which is difficult to produce by the conventional method for producing a tile by using the conventional in-furnace firing furnace. That is, the present invention applies the tile manufacturing method by thermal spraying proposed by the present applicant as solving some of the drawbacks of the conventional tile manufacturing method by in-furnace firing,
Provided is a method for producing a tile by thermal spraying, which can produce a tile having a richly colored pattern under advantageous conditions.

[Means for Solving the Problems]

The present invention is a method for producing a tile by spraying powdery glaze on a pre-fired tile base material, in which the temperature of the flame spraying frame according to the color development characteristics of the glaze using one or more glazes, To form a pattern with multiple colors on the tile surface by positively changing the thermal spray conditions such as the length of the thermal spray frame, the distance between the thermal spray burner and the tile base material, and the amount of glaze supplied to the thermal spray burner. Is a method for manufacturing a spray-coated tile.

[Action]

The state of color development of the glaze varies depending on the temperature at which it is heated. For example, when selenium-cadmium pigment containing silicic acid-alkali glaze was fired in an electric furnace, it was bright red at 800 ° C, while it was pale orange at 1000 ° C and almost transparent at 1200 ° C. there were. The color thus obtained differs depending on the temperature, and when a pigment that is particularly volatile is used, the color tends to become lighter as the temperature rises.

Therefore, in the present invention, the color is adjusted by positively changing the thermal spraying condition according to the color development state of the glaze, and a pattern of a plurality of types of color is formed on the tile surface. In the case of the thermal spraying method, unlike the glaze baking by firing in a furnace, one or more of the above-mentioned thermal spraying conditions can be locally changed for each tile. Then, by adjusting the spraying conditions while observing the color development state of the tile surface, it is easy to adjust the color development state and form the target color and pattern.

〔Example〕

-First Example-Fig. 1 shows that a commonly used tile base material is sprayed with a silicic acid-alkaline glaze containing a selenium-cormorant cadmium pigment for obtaining a red color and having a particle size of 0.1 mm or less. When
It is a graph which shows the relationship between the temperature of the flame | frame produced by the propane gas and oxygen ejected from a thermal spray burner, and the brightness of the glaze layer formed. In the figure, the brightness of the glaze layer is measured by a color difference meter at room temperature after thermal spraying.

As is clear from this figure, the brightness of the glaze layer varies over a wide range depending on the flame temperature. In this embodiment, by utilizing the relationship between the frame temperature and the brightness, the frame temperature is periodically changed in the range of 1200 ° C. to 1800 ° C., and a plurality of red-based light sources having different red-based brightness are periodically arranged on the tile surface. A color pattern could be formed. The flame temperature was changed by adjusting the flow rates of the fuel gas and oxygen gas and their flow rate ratios.

-Second Example-The brightness of the glaze also changes depending on the length of the frame. That is, in the case of the same temperature, the glaze conveyed from the thermal spray burner to the tile base material is kept in a high temperature state in the frame for a relatively long time while the frame is long. This high temperature holding time affects the coloring phenomenon of the glaze and changes the brightness of the glaze layer in the product.

FIG. 2 shows the effect of the length of this frame on the brightness of the glaze layer. In this example, the same glaze as in the first example was used, and a flame having a temperature of 1600 ° C was used.
The brightness of the glaze layer was measured by the same method as in the first embodiment.

In this embodiment, by utilizing the relationship between the frame length and the lightness, the frame length is periodically changed within the range of 200 mm to 500 mm, and the tile surface is provided with a plurality of colors of different red-based lightness. The draft pattern could be formed.

The frame length was changed by adjusting the flow ratio of fuel gas and oxygen gas.

-Third Example- Even when the frames having the same length and the same temperature are used, the brightness varies depending on the amount of glaze sprayed on the tile base material. This is because as the amount of glaze supplied to the thermal spray burner increases, the amount of heat transfer from the flame per particle of glaze decreases, and the temperature at which the glaze heats decreases.

FIG. 3 is a graph showing the relationship between the amount of glaze and the brightness. In this embodiment, this relationship is used to
Using the same glaze as in the example, the flame temperature was set to 1600 ° C., the glaze supply rate was periodically changed within the range of 5 to 16 kg / hr, and the tile surface was printed with a plurality of colors of different red-based brightness. The pattern could be formed.

In the above example, the same red-based glaze was used, and the flame temperature, frame length, and glaze supply amount were changed as the spraying conditions to form a pattern of multiple colors with different red-based brightness on the tile surface. However, the present invention is not limited to this, and by using different glazes, various spraying conditions can be variously changed according to the coloring characteristics of these glazes, so that a plurality of completely different colors (for example, reddish and It is possible to form a colorful pattern by a combination of (blue).

Further, in the above embodiment, the flame temperature, the flame length, and the glaze supply amount were selected as the spraying conditions to be changed.
Other thermal spraying conditions include the distance between the thermal spraying burner and the tile base material, the atmosphere in the frame (for example, an oxidizing or reducing atmosphere), and the like. These thermal spraying conditions are selected according to the color development characteristics of the glaze selected according to the target pattern.

〔The invention's effect〕

As described above, in the present invention, a glaze having one type or different types of color forming characteristics is used, and the thermal spraying condition is changed according to the color forming characteristics, so that the tile surface can be easily colored with a desired color. A pattern can be formed. That is, with respect to the tile base material, the spraying conditions can be locally changed, and while observing the surface state,
Since the spraying conditions can be controlled, the pattern on the tile surface can be accurately matched to the target pattern. Further, since the spraying condition can be made constant by using a spraying burner, tiles having a uniform pattern can be obtained, so that the yield of non-defective products is good, and it is possible to easily respond to on-site construction etc. .

[Brief description of drawings]

FIG. 1 is a graph showing the relationship between the temperature of the thermal spray frame and the brightness of the glaze layer obtained, and FIG. 2 is a graph showing the relationship between the length of the thermal spray frame and the brightness of the glaze layer obtained, FIG. 3 is a graph showing the relationship between the glaze supply amount and the brightness of the obtained glaze layer.

Claims (1)

[Claims] 1. A method for producing a tile by spraying a powdery glaze on a pre-fired tile base material,
Depending on the color development characteristics of the glaze, one or more glazes may be used, such as the temperature of the flame spray frame, the length of the flame spray frame, the distance between the flame spray burner and the tile base material, and the amount of glaze supplied to the flame burner. A method of manufacturing a thermal spray tile, which comprises positively changing the thermal spray conditions to form a pattern of a plurality of colors on the surface of the tile.