JPH05117012A - Method for glazing tile - Google Patents

Abstract

PURPOSE:To prevent bad glazing caused by bringing a wet belt into contact with the surface of tile in a process of applying glaze on the surface of tile. CONSTITUTION:In a process of applying glaze on tiles wherein glaze is applied to the surface of tiles while the tiles are being placed on a conveyor belt and transported, the surface part to be brought into contact with the conveyor belt is made of an elastic polyurethane material 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tile glazing method.

[0002]

As a method of applying glaze to the tile surface, a method of applying the glaze to the tile surface at a predetermined place by spraying or the like while moving the tile on a conveyor belt is widely used. It is being appreciated.

As a method for forming tiles, there is a wet extrusion forming method in which a raw kneaded material having a predetermined water content is extruded by an extruder. In this case, usually two tiles are formed.

Then, the extruded product is cut into a predetermined size, dried and fired, and then separated into tiles to obtain a product.

As a method of applying a glaze to the tile molded body by such wet extrusion molding by the above method, FIG.
The method shown in is used.

In the case of this method, the tile 1 in which two tiles are combined is used.
00a and 100b are rubber belts 102 as shown in FIG.
While being transported by, the glaze is first sprayed on the surface of one tile 100a by a spray device at a predetermined position.

In this state, the tiles 100a, 100
b is continuously conveyed, and the tile 10 is placed at a certain position.
Invert 0a and 100b.

That is, they are rotated 180 ° so that the tile 100a on the glaze side is now on the lower side and the tile 100b on the lower side is on the upper side.

Then, the glaze is sprayed by the spray device 104 onto the surface of the tile 100b which has newly come to the upper side at the next certain place.

By the way, as shown in FIG. 4, since there is a gap between the front and rear tiles on the rubber belt 102, the glaze adheres to the rubber belt 102 when the glaze is sprayed on the tiles 100a and 100b.

Therefore, as shown in the figure, the endless annular rubber belt 102 is washed with water on the lower side using a bristle brush 108, and then dried by blowing air. However, there is a problem that the rubber belt 102 still wet remains in the upper position and comes into contact with the surface of the tile 100a facing downward.

When the belt 102 comes into contact with the surface of the tile 100a in a wet state, the glaze already applied to the surface of the tile 100a is melted out by the moisture of the belt 102, or the mark of the belt 102 leaves the glaze surface of the tile 100a. Remains, which causes defective products.

[0013]

The present invention has been made in order to solve the above problems, and its gist is to provide a tile on the surface of which is glazed while moving the tile on the conveyor belt. In the glaze method, the surface portion of the conveyor belt that comes into contact with the tile is formed of an elastic polyurethane material.

[0014]

As described above, according to the present invention, the surface portion of the conveyor belt for glazing tiles is formed of the elastic polyurethane material, whereby the surface of the conveyor belt washed with water to remove the attached glaze is removed. It becomes possible to dry quickly, and the above-mentioned inconvenience can be solved.

In the conventional method using a rubber belt as the conveyor belt, the reason why the rubber belt washed with water does not dry easily is that, as the rubber belt is repeatedly used, countless microscopic cracks are formed on the surface of the rubber belt, and the rubber belt is washed with water. It has been found that this is because water enters the cracks and the rubber belt absorbs water, so to speak.

The conveyor belt is subjected to a large bending force and a local strain under a constant tension and extension, especially in a portion wound around a pulley, so that numerous minute cracks are introduced.

However, when at least the surface portion of the conveyor belt is made of an elastic polyurethane material according to the present invention, the elastic polyurethane material has a high degree of elasticity, excellent mechanical properties, toughness and weather resistance and is deteriorated. Therefore, even if it is repeatedly used, microcracks do not occur on the surface part, so it does not absorb water when washing with water and can be dried quickly, and the wet belt remains on the glazed tile surface. It is now possible to prevent contact.

From this, it has been confirmed that the defective rate of glaze due to the above-mentioned reason was 3 to 4% in the past, but it becomes almost zero according to the present invention.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows an essential part of a conveyor belt. This belt 10 is formed by welding a long elastic polyurethane material 14 having a semicircular cross section on the upper surface of a thin plate-shaped base 12.

The belt 10 has a thickness t _{1 of the} base 12 of ₁ mm and a thickness t ₂ of the elastic polyurethane material 14 of 4 mm, which is 5 mm in total (in the case of the conventional rubber belt 102). Thickness is about 12 mm). The base 12 is formed by laminating a plurality of reinforcing layers via adhesive layers.

In the method of this embodiment, as shown in FIG. 3, the belt 10 is wound around pulleys 17 and 19 so as to rotate along an endless circular locus, and the upper side of the elastic polyurethane material 14 is tiled. Two pieces of 16a and 16b are placed in a state of being aligned with each other, and a glaze is sprayed on the surfaces of the tiles 16a and 16b at a predetermined position while conveying the pieces.

Specifically, as shown in FIG. 2, first, one of the tiles 1 in a state where two tiles are aligned by the spray device 18 is used.
The glaze 20 is sprayed on the surface of 6a, that is, the surface of the tile 16a located on the upper side.

Subsequently, the tiles 16a and 16b are conveyed and inverted at a predetermined position.

By this reversing operation, the tile 16b which has been on the lower side until now is located on the upper side, and the tile 16a which is on the upper side, that is, the tile 16a on the side to which the glaze 20 has been previously applied is located on the lower side. The glazed surface is belt 10
Contact the surface of.

Two inverted tiles 16a, 16b
Continue to be conveyed by the belt 10 and at some next position by the second spray device 22 the upper tile 1
The glaze 20 is sprayed on the surface of 6b.

On the other hand, the belt 10 goes around to the lower stage side via the pulley 17, and then goes around to the upper stage side via the pulley 19 to carry the tiles 16a and 16b again.

On the lower side, cleaning water 21 is supplied to the belt 10 to wash off the glaze 20 adhering to the belt 10 and blower 2 to the wet belt 10.
Air is blown from 3 and the belt 10 is dried.

In this example, a belt 10 having a surface portion contacting the tile surface made of an elastic polyurethane material 14 is used as the conveyor belt.

The belt surface portion made of elastic polyurethane material has high elasticity and excellent mechanical properties such as toughness and elongation and weather resistance, and even if it is used for a long period of time, it has a large number of micro cracks like the rubber belt described above. Does not occur.

Therefore, the belt 10, strictly speaking, the surface portion thereof can be quickly dried even if the cleaning water 21 is washed on the lower stage side, and the belt 10 is in a sufficiently dry state when it reaches the upper stage side. ing.

Therefore, the tile 16 in contact with the belt 10
a The glaze 20 on the surface will not be dissolved by the water adhering to the belt 10 and the traces of the belt 10 will not be left on the glaze surface, the quality of the glaze surface will be good, and product defects due to defective glaze surface will occur. It can be suppressed.

Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be applied to the case where the glaze is applied to the surface of the tile by a method other than spraying, and it can be used for transportation. The present invention is applicable to a glazed method of tiles that does not involve inversion in the process, and various modifications can be made based on the knowledge of those skilled in the art without departing from the spirit of the invention.

[Brief description of drawings]

FIG. 1 is a diagram of a main part of a conveyor belt used in a tile glaze method according to an embodiment of the present invention.

FIG. 2 is an explanatory view of the same glaze method.

FIG. 3 is an explanatory view showing a movement track of a conveyor belt and a cleaning process in the same glaze method.

FIG. 4 is an explanatory diagram for explaining the background of the present invention.

5 is a perspective view of a main part of the rubber belt used in FIG.

[Explanation of symbols]

10 Conveyor Belt 14 Elastic Polyurethane Material 16a, 16b Tile 20 Glaze

Claims (1)

[Claims] 1. A method of glazing a tile, in which a tile is placed on a conveyor belt and moved while the tile is moved, wherein a surface portion of the conveyor belt in contact with the tile is formed of an elastic polyurethane material. The characteristic tile glaze method.