JPH055777B2 - - Google Patents

Description

Detailed Description of the Invention The present invention uses clay as the main material, and forms a continuous band by continuous extrusion, then dries, glazes, and fires the clay.
This invention relates to a device for obtaining long ceramic plates by cutting them into regular lengths.

Generally, roof tiles and roof tiles are subject to shrinkage, cracking, and deformation during firing, so no equipment for manufacturing long tiles has been commercially available. In other words, continuous manufacturing of elongated building materials using porcelain has never been done.

The present invention addresses these technical requirements by:
To provide a manufacturing device in which drying, heating, glazing, firing, and cutting are arranged in series and can continuously manufacture long plates having the same physical properties as before in a short time. It is something.

EMBODIMENT OF THE INVENTION Below, one Example of the continuous manufacturing apparatus of the long ceramic plate based on this invention is described in detail using drawings. FIG. 1 is an explanatory diagram showing a typical example of the above device. In the figure, 1 is clay made by mixing several kinds of raw materials, and is supplied to a kneading machine 3 via a belt conveyor 2. In addition, clay 1
is a natural product, and its components differ depending on the region where it is produced, and these features and weaknesses are offset to obtain a specific mixed clay. An example of Clay 1 is potter's stone, feldspar, kaolinite, hallosite, metahalosite, Kibushi clay, Frogme clay, etc., which are crushed and kneaded by adding water. Note that iron may be removed from this clay 1 using a magnet. 4 is a vacuum forming machine that continuously extrudes plates having cross sections as shown in FIGS. 2a and 2b. 5
The conveyor table is composed of one type of conveyor table, for example, a truck 6 or a conveyor 7 as shown in FIGS. 3a and 3b, and has fire resistance so as not to be deformed even at about 1300 degrees Celsius. In addition,
The conveyor is formed into a continuous belt via a link 7a, and is configured to be able to rotate by being wound around a driving wheel and a driven wheel (not shown), and the cart circulates on a rail to be described later. be. A tunnel dryer 8 partially dries the continuous body of a predetermined shape sent out from the vacuum forming machine 4 by hot air. In particular, molded clay 1 has a moisture content of 20
% (weight ratio), so if you remove it all at once, it will cause cracks and explosions, and the product will no longer be produced. Therefore, this step is for gradual dehydration.
9 is a straightening machine for straightening the continuous molded body A into a predetermined shape. Step 10 is a step of more efficiently dehydrating the internal moisture in a state where the surface of the elongated body formed by the high-frequency heating machine has been dehydrated to some extent. The frequency varies depending on the dehydration time and the type of clay 1, but the general frequency is microwave, for example 915MHz to 2450MHz, which is synergistic with long infrared rays generated from feldspar, quartz, etc. in clay 1. The effect dehydrates even the inner and outer layers in a shorter time. In addition, at this time, it is preferable that a wide emission wavelength band can be formed in the composition of the clay 1. 11
12 is a heating machine for keeping the continuous molded product A warm so that its temperature does not drop too much, and 12 is a glazing machine for applying glaze to the decorative surface of the continuous molded band A. Application methods include spraying, rolling, dipping, etc. 13 is a preheater for drying the glaze to some extent, and it is normal to dry the glaze to the extent that it does not stick to your fingers. 14 is a tunnel furnace configured to gradually heat the continuous compact, sinter it in a temperature range of about 1000 to 1250°C, and then slowly cool it.
The time is 3 to 24 hours. The tunnel furnace 14 is mainly fueled by heavy oil, electricity, and gas.
When firing in a short time, it is necessary to select various conditions based on the material itself. Reference numeral 15 designates a cutter for cutting the continuous molded body A into regular lengths, and a traveling cutter having a diamond blade is preferable. Reference numeral 16 denotes a conveyor for sending the fixed-length long body A cut by the cutter 15 to a packaging line (not shown), and is set at a speed faster than the line speed of the tunnel furnace 14. . 17 is a rail and a trolley 6
The continuous molded product A is placed and guided from the exit of the vacuum forming machine to the exit of the tunnel furnace 14, and the trolley 6 is separated from the continuous molded product A at the exit of the tunnel furnace 14 and placed at the exit of the vacuum forming machine 4. Return line 1 sent
7a.

What has been described above is the continuous production apparatus for long ceramic plates according to the present invention, which is equipped with a control section (not shown) for centrally controlling each device, a continuous heating system, and a system that uses infrared and far infrared rays. It can also be used for heating. Further, 18 is a cutter for cutting the continuous molded body when a trouble occurs between each device. In addition, a straightening machine can also be provided at the position shown by the dashed line in FIG.

As described above, the apparatus for continuously manufacturing long ceramic plates according to the present invention has the great feature of being able to continuously manufacture long ceramic plates. Furthermore, there is an advantage that long ceramic plates can be manufactured in a shorter time by causing the feldspar and the like of the clay composition to generate heat through the heat source of the heating machine. Furthermore, it has the feature of being able to significantly reduce energy consumption compared to conventional methods. In addition, immediately after the molded body comes out of the vacuum forming machine,
Alternatively, the defect rate was reduced because the product was straightened in a somewhat dry state.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing a typical example of a continuous production device for long ceramic plates according to the present invention, Figs. 2 a and b are perspective views showing an example of a long ceramic plate, and Figs. 3 a and b are carts. , is an explanatory diagram showing an example of a conveyor. 1... Clay, 3... Kneading machine, 4... Vacuum forming machine, 10... High frequency heating machine, 12... Glazing machine, 1
4...Tunnel furnace, A...Continuous molded body, A'...
Long ceramic board.

Claims (1)

[Claims] 1. A clay feeder that feeds clay made of pottery stone, feldspar, silica, etc. on a belt conveyor, etc.; a kneader that mixes the supplied clay; a vacuum forming machine attached to the outlet of the kneader; A tunnel dryer that dries the continuous molded product sent out from the molding machine to some extent, a straightening machine that straightens the shape immediately after passing through the tunnel dryer, and a straightening machine that mainly dries the center of the continuous molded product that has passed through the straightening machine. a high-frequency heating machine; a warming machine that supplies warm air to the continuous molded body fed from the high-frequency heating machine; a glazing machine that applies glaze to the continuous molded body fed from the heating machine; A preheating machine that dries the glaze of the continuous molded body fed from the machine to a certain degree, a tunnel furnace that sequentially fires the continuous molded body fed from the preheating machine, and a fired continuous molded body sent out from the tunnel furnace. A running cutter for cutting bodies to a fixed length and a conveyor for transporting a long ceramic plate cut to a fixed length by the cutter are arranged in a straight line, and a continuous rail runs from the vacuum forming machine to the tunnel furnace. A continuous production device for long ceramic plates, characterized in that a continuous molded body is conveyed by a cart running above.