JPH05319962A - Ceramic product with pattern and its production - Google Patents

Abstract

(57) [Summary] [Purpose] The groove pattern is formed on the grooved surface by glazeing the grooved surface of the inorganic substrate, removing the glaze except in the groove of the groove pattern, and baking the remaining glaze. Make sure that is visible. [Structure] A pair of upper and lower casting molds in which a casting port 3 is opened substantially at the center of the shaping recess 2a of the lower mold 2 and a pattern is formed on the upper surface of the shaping recess 1a of the upper mold 1 by a convex portion 6. , The slurry 8 is poured into the lower mold 2 of the casting mold, the lower mold 2 and the upper mold 1 are closed, and then the base slurry 9 is cast from the casting port 3 of the lower mold 2 to remove the slurry 8 in the mold. The casting pressure is pressed against the mold surfaces of the upper and lower molds, the casting mold is opened, and the inorganic substrate 10 having a groove pattern formed on the surface by the convex portion 6 of the upper mold 1 is taken out and fired, and the inorganic substrate is fired. A glaze 12 is applied to the surface of 10 to remove the glaze 12 from portions other than the groove 11 in the groove pattern on the surface of the inorganic substrate, and then the remaining glaze is baked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a patterned ceramic product and its manufacturing method.

[0002]

2. Description of the Related Art Recently, large-sized patterned porcelain plates have been attached to inner and outer walls and floor materials to enhance the aesthetic appearance of buildings.

Such a large porcelain board with a pattern is manufactured by the following cast molding developed by the present inventor. That is, first, as a pair of upper and lower casting dies, a lower die having a casting opening at an approximate center of a shaping recess and an upper die having a pattern formed by a convex portion on the upper surface of the shaping recess are prepared. Then pour the slurry into the lower mold, then close the upper and lower molds,
In this state, the base slurry is cast into the mold from the casting port of the lower mold, and the casting pressure presses the slurry in the mold against the mold surfaces of the upper and lower molds to mold the inorganic substrate. A groove pattern is formed on the surface of the inorganic substrate thus obtained. After that, as shown in FIG. 8, the groove pattern forming surface 15a of the inorganic substrate 15 is uniformly glazed and then fired so that the groove 16 pattern appears on the surface of the inorganic substrate 15.

[0004]

However, in the above method, the glaze 17 is heated by the heating during the baking after the glaze.
Part of the glazed material flows into the groove 16 and glaze 1
Since the thickness of the glaze 7 is reduced and the thickness of the glaze 17 is increased in the groove 16, a difference in the thickness of the glaze 17 is generated between the horizontal portion 18 and the groove 16, and the difference in unevenness is lessened. Therefore, there is a problem that only the shade of color caused by the difference in the thickness of the glaze 17 is displayed on the surface of the inorganic substrate 15, and the groove pattern is not emphasized so much.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a ceramic product with a pattern in which a groove pattern is clearly expressed and a method for producing the same.

[0006]

In order to achieve the above object, the present invention is to apply a glaze to the grooved surface of an inorganic substrate and then remove the glaze other than in the groove of the grooved pattern to bake the remaining glaze. The first gist of the present invention is a patterned ceramics product, in which a casting port is opened substantially in the center of the lower mold-forming recess, and a pattern is formed on the upper surface of the upper mold-forming recess by a convex pattern. A step of preparing a set of casting molds, a step of pouring the sludge into the lower mold of the casting mold, and after closing the lower mold and the upper mold, casting the base slurry from the lower mold casting port A molding step of pressing the slurry against the mold surfaces of the upper and lower molds by the casting pressure, a step of taking out the inorganic substrate having a groove pattern formed on the surface of the convex parts of the upper mold surface from the casting mold and baking it, The step of glazeing the surface of the inorganic substrate, and the inorganic substrate surface To the the step of removing the glaze from the portion other than the groove of the groove pattern, the preparation of ceramics products with patterns and a step of baking the remaining glaze after remove glaze and second aspect.

[0007]

In other words, the method of the present invention comprises a pair of upper and lower casting molds, a lower mold having a casting opening at approximately the center of the shaping concave portion, and a convex portion on the upper surface of the shaping concave portion. After preparing the upper mold and pouring the sludge into the lower mold, the lower mold and the upper mold are closed and the base slurry is cast into the mold from the casting port of the lower mold. Therefore, the sludge in the mold can be pushed up in its original state without being deformed by the base sludge flowing from the casting port.
As a result, the slurry and the base slurry are tightly integrated, and the casting pressure of the base slurry allows the slurry to be uniformly pressed against the upper and lower mold surfaces. Further, even if the base slurry is cast at a high pressure, the above uniform pressing effect is not impaired, so that the slurry does not deform. Therefore, the inorganic substrate can be obtained in a short time by high-speed casting.
The surface of the thus obtained inorganic substrate is densely formed, and a groove pattern is formed on the dense surface by the convex portions of the upper die surface. In the present invention, next, the above inorganic substrate is fired, then glaze is applied to the surface where the groove pattern of the inorganic substrate is formed, and then the glaze is removed from a portion other than the groove of the groove pattern on the surface, After removing it, the remaining glaze is baked. Therefore, in the ceramic product of the present invention, the surface of the inorganic substrate is
The glaze is baked only in the groove, and the background color of the inorganic substrate and the color of the glaze can be distinguished from each other, and the groove pattern can be sufficiently emphasized.

Next, the present invention will be described in detail based on examples.

[0009]

EXAMPLE FIG. 1 shows a casting mold used in the present invention. In the figure, reference numeral 1 is an upper mold, and a convex portion 6 is formed on the upper surface of the shaping concave portion 1a of the upper mold 1 so that a lifting operation is performed by driving a hydraulic cylinder (not shown). It has become. Reference numeral 2 denotes a lower mold, and the lower mold 2 has a casting port 3 opened at the center of the bottom surface of the shaping recess 2 a, and extends from a material supply source (not shown) via a flow path 4. It communicates with the material supply pipe 5.

Production of a patterned porcelain plate using the above-mentioned casting mold is carried out, for example, as follows. That is, the second
As shown in the drawing, the sludge 8 colored with a pigment or the like is caused to flow down from the shooter 7 and is filled in the shaping recess 2 a of the lower mold 2. The colored slurry 8 is made of a mixture of feldspar, silica stone, clay and the like. At this time, the filling amount is 60% of the inner volume of the lower mold 2.
It is important that the content be ˜85%. That is, when the filling amount is less than the above range, the inflow amount of the base sludge at the time of casting increases, so that the influence of the flow on the colored sludge 8 becomes large and the shape is easily deformed. This is because if the amount is too large, the inflow amount of the base slurry at the time of casting becomes small and the molding tends to be insufficient. After the lower mold 2 is filled with the colored slurry 8 in this way, the shooter 7 is moved in the direction of the arrow to be removed from the space between the upper and lower molds 1 and 2, as shown in FIG.
In this state, the upper mold 1 is lowered to clamp the mold, and the base slurry 9 containing the glass fiber component having high tensile strength is cast into the mold from the casting port 3. In this case, the base sludge 9 is the fourth
As shown in the figure, while pushing the colored sludge 8 upward while spreading in the left-right direction in the mold, and pressing the colored sludge 8 against the inner surfaces of the upper mold 1 and the lower mold 2 by the casting pressure, Be integrated. At this time, the water content of the colored slurry 8 and the base slurry 9 is absorbed by the inner surfaces of the upper mold 1 and the lower mold 2. Next, when this is released from the mold, an inorganic substrate 10 having a groove 11 pattern formed on the upper surface as shown in FIG. 5 is obtained. The inorganic substrate 10 has a thickness of 15 mm, and the groove 11 has a width of 2 mm and a depth of 2 mm. After that, the inorganic substrate 10 is unglazed at 800 ° C., and a glaze 12 is glazed on its surface as shown in FIG. The glaze 12 is feldspar 50%, silica 10%, frog 5
%, Calcium carbonate 10%, zinc white 7%, frit 15
% And pigment 3% (each unit is Wt%) and the like, and finely ground and powdered to which a solvent, a dispersant, etc. are added and suspended to form a fluid. What is colored in a color different from the color that it has is used. After glazing, as shown in FIG.
Is ground with a sand screen or the like, leaving the glaze 12 only inside the groove 11, and this is put into a baking furnace and baked at 1200 ° C. In this way, a patterned ceramic plate is obtained.

In the above embodiment, the colored slurry 8 is used as the casting port 3
By the base slurry 9 flowing in from, it is uniformly pressed against the inner surfaces of the upper and lower molds 1 and 2, so that the surfaces become dense. Moreover, on the surface of the obtained patterned porcelain plate, a pattern in which the color of the colored sludge 8 and the color of the glaze 12 are clearly distinguished from each other and the groove pattern is emphasized appears. Further, since the glass fiber component contained in the base slurry 9 has a high tensile strength, the obtained patterned porcelain plate is strong in strength.

In the above embodiment, the colored slurry is used as the slurry, but the slurry is not limited to this, and uncolored slurry may be used as long as it has a color different from that of the glaze.

Further, in the above embodiment, the glaze 12 is entirely scraped off from the flat surface portion 13 of the surface of the porcelain plate, but the glaze material 12 may be left on the flat surface portion 13 in the form of a thin film. Further, in the above embodiment, the inorganic substrate 10 is unglazed and then glazed, but in some cases, it may be glazed without being unglazed. Therefore, in the present invention, the inorganic substrate is not only a unglazed product but also a product obtained by solidifying slurry in a mold,
The thing which dried it is also included.

[0014]

As described above, according to the present invention, as a pair of upper and lower casting molds, a lower mold having a casting opening at approximately the center of the shaping recess and a convex portion on the upper surface of the shaping recess. After preparing the upper mold having formed, after pouring the sludge into the lower mold, the lower mold and the upper mold are closed and the base slurry is cast into the mold from the casting port of the lower mold. The sludge inside is pushed up as it is without being deformed by the base sludge that flows in from the casting port, the sludge and the base sludge are closely integrated, and the casting pressure of the base sludge causes the sludge to move up and down. It is pressed uniformly against the mold surface of. Therefore, the surface of the obtained inorganic substrate is densely formed. Further, even if the base slurry is cast at a high pressure, the above-mentioned uniform pressing effect is not impaired, so that the slurry does not deform and the inorganic substrate can be obtained in a short time by high-speed casting. Moreover, after glaze is applied to the grooved surface of the inorganic substrate, the glaze is removed from the portion other than the groove of the grooved pattern, and the remaining glaze is baked, so that in the ceramic product of the present invention, The background color and the color of the glaze can be distinguished from each other, and the groove pattern can be sufficiently emphasized.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a casting mold used in the present invention.

FIG. 2 is an explanatory view showing pouring sludge into the casting mold.

FIG. 3 is an explanatory view showing a base slurry cast in the casting mold.

FIG. 4 is an explanatory view showing a state where an inorganic substrate is being molded in the casting mold.

FIG. 5 is a sectional view showing an inorganic substrate molded in the casting mold.

FIG. 6 is a sectional view showing an inorganic substrate whose surface is glazed.

FIG. 7 is an explanatory view showing a patterned ceramic product of one embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a patterned ceramic product of a conventional example.

[Explanation of symbols]

 1 Upper mold 2 Lower mold 3 Casting port 6 Convex portion 8 Sludge 9 Base slurry 10 Inorganic substrate

Claims (2)

[Claims] 1. A patterned ceramics product obtained by glazeing the grooved surface of an inorganic substrate with glaze, removing the glaze except in the grooves having the grooved pattern, and baking the remaining glaze. 2. A step of preparing a pair of upper and lower casting molds in which a casting opening is opened substantially at the center of the shaping recess of the lower mold and a pattern is formed on the upper surface of the shaping recess of the upper mold with a convex portion. And, the step of pouring the sludge into the lower mold of the casting mold, after closing the lower mold and the upper mold, cast the base slurry from the casting port of the lower mold to move the sludge in the mold up and down with the casting pressure. A molding step of pressing against the mold surface of the mold, a step of taking out the inorganic substrate having a groove pattern formed on the surface of the convex surface of the upper mold from the casting mold and baking it, and applying a glaze to the surface of the baked inorganic substrate. A method for producing a patterned ceramics product, comprising: a step of glaze, a step of removing the glaze from a portion other than the groove of the groove pattern on the surface of the inorganic substrate, and a step of baking the remaining glaze after removing the glaze.