JPH0151336B2 - - Google Patents

Description

[Detailed Description of the Invention] [Subject of the Invention] The present invention relates to a patterned terrazzo tile, and particularly to a patterned terrazzo tile that uses stone chips such as natural marble of various colors to create a beautiful pattern on the tile surface. Regarding.

[Background of the invention]

The surface layer of the tile is formed with mortar made by mixing chips made of stone such as marble, white cement, and water, and on top of that, the bottom layer of the tile is formed with ordinary mortar made by mixing river sand, ordinary cement, and water. Terrazzo tiles, which are manufactured by forming the tile surface layer and the tile bottom layer under pressure using a press, are often used as flooring materials or wall materials of various buildings.

Recently, patterned terrazzo tiles have also been proposed and are gaining popularity for their fashionability. However, patterned terrazzo tiles, in which a single tile uses a plurality of natural marble chips of different colors to express beautiful patterns, have not been realized due to problems that must be overcome in manufacturing.

[Purpose of the invention]

An object of the present invention is to provide a patterned terrazzo tile that expresses a beautiful pattern by using a plurality of natural marble chips of different colors in one tile.

[Summary of the invention]

In order to achieve the above object, the present invention is divided into a plurality of blocks, each of which has a tile surface layer formed of stone chips such as natural marble of different colors, mortar made of calcium carbonate, and white cement; A tile intermediate layer located below the surface layer and formed by spraying and laminating a mixed powder of calcium carbonate and ordinary cement before the tile surface layer has hardened, and ordinary mortar located below the tile intermediate layer. The tile bottom layer is integrally formed under pressure.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings. FIG. 1 is a sectional view of a patterned terrazzo tile that is an embodiment of the present invention. As shown in the figure, the patterned terrazzo tile has a structure in which a bottom layer 1, an intermediate layer 2, and a surface layer 3 are integrally formed. The bottom layer 1 is formed of ordinary mortar made of river sand, pea gravel, and ordinary cement, and the middle layer 2 is formed of a mixture of calcium carbonate and ordinary cement.
Furthermore, the surface layer 3 is formed of mortar mixed with stone chips such as natural marble, calcium carbonate, and white cement.

FIGS. 2a, 2b, and 2c are surface views each showing an example of a patterned terrazzo tile according to the present invention. As shown in the figure, the surface layer includes a plurality of blocks 3a to 3f, 3g to 3i, and 3j to 3 having various shapes.
The plurality of blocks are each formed of mortar mixed with stone chips such as natural marble of different colors. Hereinafter, a method for manufacturing the patterned terrazzo tile will be explained.

FIGS. 3a to 3f are diagrams showing a manufacturing process for explaining a method of manufacturing a patterned terrazzo tile, which is an embodiment of the present invention. This figure is a cross-sectional view taken along the line X-X in FIG. 4c, showing a state in which the inner frame mold 12 shown in FIG. 4b is inserted into the outer frame mold 11 shown in FIG. 4a, and 13 is This is a vibration table plate having a vibration drive unit (not shown) at the bottom. In this way, the vibration table plate 13
An outer frame mold 11 is placed on top, and an inner frame mold 12 is inserted into the outer frame mold 11, and each block A, B, and C is filled with stone chips such as marble, calcium carbonate, and white cement. The surface layer mortar consisting of the following is poured into blocks A, B, and C with marble chips of different colors as shown in Figure a. Next, the vibration drive unit provided at the bottom of the vibration table plate 13 is activated to vibrate the vibration table plate 13 back and forth and from side to side.
The surface layer mortar is dispersed throughout the mold, air bubbles are removed, and the surface layers 14a to 14c are flattened. Next, as shown in FIG. to form the tile intermediate layer 15. Next, as shown in FIG. 1B, a normal mortar mixed with river sand, pea gravel, and normal cement is poured into the surface of the tile intermediate layer 15 to form the tile bottom layer 16. Press 17 from above this tile bottom layer 16 as shown in FIG.
After pressurizing the tile layers 14, 15, and 16 at the same time, the outer frame mold 11 is removed to create a terrazzo tile having a cross section as shown in FIG. After polishing, patterned terrazzo tiles are completed. The above is an overview of the method for manufacturing a patterned terrazzo tile according to an embodiment of the present invention, and each step will be explained in detail below.

First, the mold structure will be explained in detail. FIG. 5 is a partially enlarged sectional view taken along the line X--X in a state where the inner frame mold 12 is inserted into the outer frame mold 11 as shown in FIG. 4c. Figure a shows a conventional mold, and figure b shows a mold according to an embodiment of the present invention. As shown in FIG.
Both have a cross section with a constant thickness at both the top and bottom. Inner frame mold 12 having such a shape
When the surface mortar is pulled out from the surface mortar layer 14 which has not yet hardened, the surface layer mortar flows into the gap where the inner frame mold 12 was inserted at an inconsistent speed, so that the cross section of the surface layer becomes as shown in FIG. 6a. There is a drawback that the tile surface is disordered as shown by line L, and a beautiful border line pattern does not appear on the tile surface. Therefore, as shown in FIG. 5b, if the cross section of the strip-shaped metal material constituting the inner frame mold 12 is formed into a wedge shape that is thicker at the top and thinner at the bottom, the inner frame mold can be pulled out from the unhardened surface mortar layer. Even if the adjacent surface mortar layer is line M in FIG.
As shown in the figure, since the tiles are drawn adjacent to each other in straight lines, the line pattern appears beautifully and accurately on the tile surface.

Next, the production of marble chips that will become the surface layer will be explained. Patterned terrazzo tiles differ from conventional terrazzo tiles in that they use natural marble chips to create a mosaic-like feel, so their grain size and shape need to be constant.
In this example, the grain size of the marble chips is
It was set to 1.8 mm to 2.5 mm. After producing marble chips with such particle size and shape, the marble chips are washed with water to remove stone powder adhering to the surface of the chips. This is a step to prevent the white cement from discoloring when preparing the mortar that will become the surface layer 14, as will be described later. A plurality of types of marble chips thus cleaned are manufactured according to the color of natural marble.

The natural marble chips washed as above are mixed with calcium carbonate powder and white cement, mixed with water and kneaded to form the surface layer mortar which will become the surface layer 4 of the tile as shown in Figure 7 a to c. A′, B′, and C′ are manufactured separately. The reason for adding calcium carbonate powder here is to make the mortar harden quickly due to the high absorption rate of calcium carbonate. Using the mortar thus made, the inner surface of the outer frame mold 11 is divided into blocks A, B, and C by the inner frame mold 12, and surface layer mortars A', B', and C' are applied according to the color of the marble chips. After that, the vibration table plate 1
3 is vibrated back and forth and left and right to disperse the mortar and remove air bubbles, as described above.

The surface layers 14a to 14c of marble chips are made by vibrating the vibrating table plate 13 to remove air bubbles from the marble chips as described above.
On top, add calcium carbonate chips (particle size 0.6mm to 1.2
Dried powder mixed with normal cement powder (mm) and ordinary cement powder is sprinkled to laminate the tile intermediate layer 15. Normally, terrazzo tiles are made by pressing and forming a bottom layer of ordinary mortar consisting of river sand, pea gravel, and ordinary cement on top of a surface layer made of so-called surface mortar. It is manufactured by dehydrating the surface layer mortar using the bottom mortar. This principle is basically used for patterned terrazzo tiles, but outer frame mold 1
When the inner frame mold 12 is pulled out from 1 and ordinary mortar is poured onto the unhardened surface layers 14a to 14c, the impact or the impact of pressurization may cause the boundary between the surface layers 14a and 14b or the surface layer to Since the surface layer mortar is mixed in at the boundaries between 14b and 14c, accurate and beautiful boundaries cannot be expressed, and this has been the bottleneck in producing patterned terrazzo tiles. In order to solve this problem, in this embodiment, a powder made by mixing calcium carbonate chips and ordinary cement is used as the surface layer 14a.
- 14c to form an intermediate layer 15 of the tile, and this intermediate layer 15 spreads over the surface layers 14a to 14c.
It absorbs water from the skin and dehydrates it rapidly. In particular, calcium carbonate chips have a high water absorption rate, so they act effectively on dehydration.

After the moisture in the surface layers 14a to 14c is rapidly absorbed by the mixed powder layer of dried calcium carbonate chips and ordinary cement as described above, ordinary cement is made by adding water to river sand, pea gravel, and ordinary cement. Even if mortar is put in with an automatic dosing machine or the like and pressurized with the press 17, the tile surfaces 14a to 14
Since the moisture in c is absorbed by the intermediate layer 15, no surface layer mortar made of marble chips is mixed in at the boundary between the tile surface layers 14a and 14b or between the tile surface layers 14b and 14c.
Therefore, the boundaries between each block appear as beautiful line patterns. Moreover, the thickness of each layer is such that the surface layer 14 is approximately
12~15mm, middle layer about 2~3mm, bottom layer 15~20
mm, and a high-pressure hydraulic press with a pressure of approximately 200 kg/cm ² is used.

The semi-finished tiles that have been pressure-formed using a high-pressure press as described above are easily stored and cured for at least 48 hours.
Let it harden. Surface layer 4 of cured semi-finished tile
is polished with a whetstone, and these whetstones can be classified into three types depending on their purpose. In other words, the first stage is the surface scraping stage, the second stage is the polishing stage, and the third stage is the polishing stage.
is the stage of producing gloss. The main raw materials of the grinding wheels used in the first cutting stage and the second polishing stage are both alumina cement, pumice, and carborundum, and the only difference is the roughness of the grinding wheels.
For polishing to achieve a glossy shine, a fine grindstone made of alumina cement, carborundum, sulfuric acid, and lead is used. The structure described above is polished with a whetstone, but the whetstone in the third stage of producing luster contains oxalic acid as mentioned above, and this oxalic acid is solid in the whetstone state, but during polishing. When dissolved in the water used, it forms a film on the surface of the tile and at the same time penetrates into the tile. As a result, for example, when tiles are placed on the floor, patterned terrazzo tiles are created that will last for many years and retain their luster even after wear and tear.

Incidentally, in the above embodiment, natural marble chips were used for the surface layer mortar that forms the surface of the tile, but it goes without saying that ordinary natural stone may be used as long as it produces beautiful colors. Furthermore, if the inner frame mold 2 is formed appropriately, it becomes possible to manufacture terrazzo tiles with various patterns other than those shown in FIGS. 2a, b, and c.

As explained in detail above, according to the above embodiment, the inner frame mold 12 that divides the inner surface of the outer frame mold 11 into several blocks is inserted into the outer frame mold 11,
After pouring surface layer mortar into this block to form a surface layer, the inner frame mold is pulled out and dry powder mixed with calcium carbonate chips and ordinary cement is sprinkled and laminated on top of the surface layer to form an intermediate layer. , this intermediate layer absorbs moisture from the surface layer and causes the surface layer to harden. Therefore, even if ordinary mortar is then added to form the bottom layer and pressure molded using the press 17, the pattern of the surface layer will not be disturbed by these impacts, resulting in a patterned terrazzo tile with beautiful border lines. .

〔Effect of the invention〕

As explained above, the patterned terrazzo tile according to the present invention consists of a tile surface layer formed of stone chips such as natural marble divided into a plurality of blocks, mortar made of calcium carbonate, and white cement, and a tile surface layer formed of mortar made of ordinary mortar. Since the structure is such that an intermediate tile layer made of a mixture of calcium carbonate and ordinary cement is provided between the bottom layer of the tile, the boundaries of the surface layer divided into multiple blocks that form the tile surface appear beautifully. The colors of natural marble and other stone chips stand out beautifully, making it an extremely effective material for floors and walls in buildings.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a patterned terrazzo tile according to the present invention, FIGS. 2 a, b, and c are front views each showing an example of a patterned terrazzo tile, and FIGS. 3 a to f are each a cross-sectional view of a patterned terrazzo tile. Diagrams showing the manufacturing process; Figures 4a, b, and c are molds for manufacturing patterned terrazzo tiles; Figures 5a and b are cross-sectional views of the metal band forming the mold; and Figures 6a and b are the surfaces. FIG. 7 is a diagram showing the inner frame mold removed from the layer, and FIG. 7 is a diagram showing the surface layer mortar. In the figure, 1...Tile bottom layer, 2...Tile middle layer, 3...Tile surface layer, 11...Outer frame mold, 1
2... Inner frame mold, 13... Vibration table plate, 14a,
b, c...surface layer, 15...middle layer, 16...bottom layer.

Claims (1)

[Claims] 1. A tile surface layer consisting of a plurality of blocks made of marble chips formed from granular natural marble, calcium carbonate and white cement, and a mixture of calcium carbonate and ordinary cement located below the tile surface layer. and a tile bottom layer located below the intermediate layer and made of ordinary cement, and at least two or more of the plurality of blocks of the tile surface layer are made of marble chips of different colors. A patterned terrazzo tile characterized in that the tile surface layer, tile intermediate layer, and tile bottom layer are integrally pressure-molded using the mortar used.