JPS6221747A - Continuous manufacturing apparatus for elongated ceramic plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention involves forming a continuous band by continuous extrusion of a raw material whose main component is clay, and then drying and firing it in a short period of time to make it into a fixed size. This invention relates to a device that continuously manufactures long ceramic plates of a predetermined length by cutting them.

[Conventional technology]

Rovers and tiles are made by cutting a continuous strip sent out from a forming machine into short lengths, then forming it by pressing, etc., then drying and baking it, or by filling a mold with material and shaping it by pressing, and then It was manufactured by either drying or firing. Moreover, the firing process required several days of loading the molded roof tiles, tiles, etc. onto a trolley in five to seven levels.

[Problem that the invention seeks to solve]

In this type of apparatus, the drying and firing process takes several days, so it has not been possible to dry and fire in a continuous zone due to productivity, cost, and space considerations. Furthermore, since the conventional apparatuses dry uncured roof tiles or roof tiles from the surface, there is a disadvantage that the roof tiles or tiles may be twisted, cranked, or destroyed during drying and firing. Furthermore, with conventional equipment, it was not possible to form elongated objects due to the mold, and even homogeneous roof tiles and roof tiles could only be produced within wide tolerances.

[Means for solving problems]

In order to eliminate such drawbacks, the present invention installs an infrared heater next to the vacuum forming machine to dry the continuous forming band from the center, and then uses a general dryer that uses the heat source from the firing furnace. Furthermore, the ceramic plates are heated with microwaves, and then a firing furnace is installed, and a traveling cutter is arranged linearly at the exit of the furnace to produce ceramic plates in a long form and continuously in a shorter time than before, and in a smaller size. To provide a continuous manufacturing device for long ceramic plates which can be manufactured at low cost using the device.

〔Example〕

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, ``■'' is clay mixed with several kinds of raw materials through a kneader such as a chamotte (not shown), and is supplied to a vacuum forming machine 3 through a belt conveyor 2. The vacuum forming machine 3 is used to continuously extrude and mold the clay ■ into the shape shown in, for example, FIGS. These features and weaknesses are mutually offset to obtain a specified mixed clay. Examples of clays 1 include pottery stone, feldspar, kaolinite, hallosite, metahallosite, terminal clay, and frog's eye clay. , Shigaraki wood clay, etc. is crushed and kneaded by adding water.Also, this clay 1
If necessary, iron may be removed using a magnet. 4 is a heater that uses infrared rays as a heat source and is effective for drying the continuous forming zone A from the center to the surface layer in a short time.
% and strengthen shape retention. 5 is an area where the moisture content of the continuous molding zone A is further reduced in the dryer, for example, to about 5% to 2%;
It is heated at 0 to 400°C. The heat source of the dryer 5 is, for example, hot air using waste heat sent from the firing furnace (2), and the hot air is injected onto the continuous forming zone A from, for example, a vibro, as shown in FIG. The atmosphere of the dryer 5 is heated uniformly by stirring. 8 is a high-frequency heating machine that uses microwaves and infrared rays to reduce the moisture in continuous forming zone A to 0%, and furthermore, uses the synergistic effect of far infrared rays generated when the quartz and feldspar in the clay is irradiated with microwaves to continuously form This is to dry the surface layer and center layer of band A in a short time. Note that when microwaves are used, metal rollers # cannot be used to convey the continuous forming band A, and dielectric rollers 9 are used. The temperature distribution for the firing furnace is mountain-like from the inlet 10a to the outlet 10b, and is divided into a preheating area 11, a firing area 12, and a cooling area 13 in this order.The temperature of the preheating area 11 is 150°C.
-700°C, 800-1300°C in the firing zone 12, and 600-100°C in the cooling zone 13.

Of course, the temperature setting between each region is different depending on the type and composition of the clay 1, and the temperature between each region is not clearly divided, but is a temporary division in continuous firing. Further, to explain the firing furnace, the firing furnace burns a combustible gas such as LPG gas to fire the continuous forming zone A, and the arrangement of burners (not shown) for this purpose corresponds to each region. It shall be provided as follows. Also,
Mesobelts, metal rollers, ceramic rollers, alumina rollers, etc. are used as conveyance means for the continuous forming band A inside the firing furnace, and in particular, the range of the firing area 12 is 1300 mm.
Since the temperature rises to about .degree. C., for example, as shown in FIG. 4, an alumina roller 16 is placed between the metal main shafts 14 and 15 to prevent heat from being transferred to the drive source. (2) is a conveyor, for example, which winds a mesh belt 20 between the driving wheel 18 and the driven wheel 19;
A large number of free auxiliary rollers 21 are arranged between the rollers 19 and 19, and are mainly arranged in series between the heater 4 and the dryer 5 to improve the evaporation of moisture in the continuous forming band A.

Reference numeral 22 denotes a cover for insulating the area where the continuous molding band A flows linearly, and is highly heat insulating. The firing area 12 of the firing furnace (3) is made of refractory bricks, etc., through which the air passes continuously in a straight line, and an exhaust damper (not shown) is arranged between each device and area. It is something that should be set up. 23 is a running cutter that cuts the continuous molded band A into regular lengths. 24 is a transfer machine, and the running force is...
The long ceramic plate A' cut at 9z3 is transported at a speed faster than the speed at which it is delivered from the kiln to prevent it from colliding with the continuous forming band.

In addition, although not shown, free rollers, belts, etc. are appropriately arranged in the heater 4, dryer 5, and firing furnace material to prevent the continuous forming band from sagging or causing abnormalities in conveyance. be.

Next, the operation will be explained.

First, clay 1 consisting of Shigaraki wood clay, chamotte, water reducing agent, and water is prepared. In addition, the weight% is Shigaraki wood clay 61
．． 5%, chamotte 20%, water reducing agent 0.5% (product name: Celluflo Dai-ichi Kogyo Seiyaku Co., Ltd.), and water 18% in a clay kneading machine (MP
-100 model manufactured by Miyazaki Tekko Co., Ltd.). Also, the vacuum forming machine 3 has an extrusion capacity of 100 to 150 jl!
/hr type name MV-FM-A-1 type (manufactured by Miyazaki Tekko Co., Ltd.) was used. As the heater 4, 10 far-infrared panel heaters with a wavelength of 4μ to 400μ are arranged in an interval of 10 meters, and the water inside the continuous molding band is diffused to the surface to speed up dehydration.
It is made of urethane, which reduces moisture content by up to 10%. The dryer 5 has a temperature of 200 to 300° C. within about 10 to 30 m, and was set at 300° C. and 10 m. The high frequency heating machine 8 is, for example, 915M1lz to 2450MFIz 2
It was designed to irradiate over a meter distance. In addition, in the firing furnace, the preheating area 11 raises the temperature from 150 to 800°C in 10 m, the firing area 12 raises the temperature from 800 to 1300°C in 5 m, and the cooling area 13 raises the temperature from 1300 to 100°C in 10 m.
This is a configuration that provides low r at m. Furthermore, the extrusion speed to the continuous forming zone was set to 20 m/min, the mesh belt was arranged between the heater 4 and the dryer 5, and the preheating area 11 and the cooling area 1
3 was formed with an iron roller, and the firing area 12 was formed with an alumina roller. Note that the pass lines of continuous forming band A were at the same height, and the moving speed was set to synchronize with the extrusion speed. Therefore, the clay 1 is supplied to a vacuum forming machine 3 via a conveyor 2, and from the outlet thereof, a continuous forming band A as shown in FIG. . Heater 4 reduces the moisture in continuous forming band A to 1
Reduce to 0% and feed to drying m5. The dryer 5 reduces the moisture content to 2%, the high-frequency heater 8 reduces the moisture content to 0%, and sends it to the firing furnace, where it is preheated, fired, and cooled to exit 10b.
1rIiA' in the long direction, and cut it into a fixed length using the traveling cutter 23, for example, 2424 nm, 3030 mm, 3
A long ceramic plate is obtained by cutting the ceramic plate to a length of 636 mm. [Effects of the Invention] As described above, according to the continuous production apparatus for long ceramic plates according to the present invention, extrusion of clay, reduction of moisture, firing, and cooling can be carried out in a small straight line and within a short time. Moreover, it has the great feature that it can be manufactured as a continuous band at high speed. In addition, because we use infrared rays, hot air using waste heat, and high-frequency heating to reduce the moisture content of clay, we can smoothly reduce moisture content in a short time at low cost, and also have the characteristics of being able to produce in large quantities with high efficiency. . Furthermore, the length of the ceramic plate can be cut to any desired length.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a typical example of a continuous manufacturing apparatus for long ceramic plates according to the present invention, FIGS. 2(a) and (b) are perspective views showing an example of a continuous forming band, and FIG. FIG. 4 is a perspective view showing a portion of the dryer, and FIG. 4 is a perspective view showing a portion of the firing furnace. l...clay, 3...vacuum forming machine, 4...heater,
5... Dryer, 8... High-frequency heating machine, ``Shi''... Calcining furnace, 23... Traveling cutter, A... Continuous forming band, A'
...Long ceramic board.

Claims (1)

[Claims] (1) A vacuum forming machine that continuously extrudes raw materials mainly made of clay, a heater that uses infrared rays as a heat source to dry the continuous forming band sent out from the forming machine, and a continuous forming band sent out from the heater. a high-frequency heating machine that further dries the inside of the continuous formed band sent out from the dryer; and a firing furnace that bakes the continuous formed band sent out from the heating machine;
A traveling cutter that cuts the fired continuous formed band sent out from the firing furnace into a fixed length, and a transfer machine that transports the long ceramic plate cut into the fixed length by the cutter are arranged in a straight line. Continuous manufacturing equipment for long ceramic plates.