JP3100177B2 - Ceramic firing kiln - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric porcelain kiln capable of performing three of the most important calcination steps (unglazed, main baked, and overglazed) in the porcelain manufacturing process.

[0002]

2. Description of the Related Art The shape of a conventional electric ceramic firing kiln is generally known to be rectangular or cylindrical. In the case of a rectangular firing furnace, the refractory material and the heat insulating material in the furnace are used in a flat plate, and in the case of a cylindrical firing kiln, the refractory material and the heat insulating material in the furnace are formed in a cylindrical shape. I'm using

[0003]

However, in the prior art as described above, in the case of a rectangular electric ceramic firing kiln, a flat refractory material and a heat insulating material can be used, so that the assembling work is easy. However, since dead volumes occur at the four corners, the ratio of the inner area of the kiln to the outer diameter of the ceramic to be fired is large, so the heat dissipation increases, the electric capacity increases, and the power consumption increases, compared to the energy required for firing. There is a problem. Further, there is a problem that skill and a great deal of labor are required to replace the heating element.

In the case of a cylindrical electric ceramic firing kiln, the inner area of the firing kiln relative to the outer diameter of the ceramic is small, but it is necessary to form a refractory material and a heat insulating material into a cylindrical shape, and the heat generating element is incorporated. However, since it is not planar, it is not easy to assemble and there is a problem that the cost is increased. Further, there is a problem that the replacement of the heating element is a very difficult operation such as breakage or connection technology.

An object of the present invention is to provide a new electric porcelain kiln which has solved the above-mentioned disadvantages.

[0006]

Therefore, in the ceramic kiln of the present invention, the shape of the kiln is formed into an octagonal column, and each of the inner walls of the octagonal column-shaped outer plate constituting the outer wall of the kiln is formed. On one side, a heat insulating material and a refractory material with a heating element independently attached to the inner surface inside the inside are detachably superimposed and mounted, and a refractory material with a heat insulating material and a heating element attached to the upper surface is also layered on the bottom. It is detachably mounted, and each of the independent heating elements is connected to a series at a non-heating portion at a lower portion of the firing furnace.

[0007]

The ceramic firing kiln of the present invention is constructed as described above. The firing of the ceramic is performed by radiant heat of a heating element installed on the inner surface of the firing kiln for an electric heating type kiln.

[0008] In general, when the inner area of the kiln is larger than that of the fired product, the amount of heat dissipation is large, and the firing temperature does not increase unless the electric consumption is increased. However, when the shape of the kiln is an octagonal prism as in the firing furnace of the present invention, compared to the cylindrical shape as described above, there is almost no difference in the inner area, and there is almost no effect on the firing efficiency, On the other hand, the inner area ratio is greatly improved as compared with the rectangular body, and the firing efficiency is good. In addition, the heating elements are independently attached to and integrated with the eight refractory materials, respectively, and are connected to the adjacent heating elements in series at the non-heating section at the bottom of the kiln, so that replacement is easy.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A firing kiln according to one embodiment of the present invention is shown in FIGS.
Explaining with reference to FIG. 6, in these figures, the kiln is
It comprises an outer plate 12 made of a thin steel plate or the like in the shape of an octagonal cylinder having an opening at the top and a bottom plate 13 at the bottom, and a cover plate 7 and the like. Octagonal bottom plate 1 at the bottom of outer plate 12
An octagonal bottom heat insulating material 4 and a bottom refractory material 3 having a slightly smaller outer diameter are laminated and mounted on the inner upper part of the inside 3, and a side wall heat insulating material is provided on each side of the inner wall of the outer plate 12. The material 2 is fixed to the inner wall in contact with the end thereof, and the refractory material 3 for the side wall is fixed inside the inner wall, forming an octagonal hollow portion in the center.

Since the refractory material 1 and the heat insulating material 2 have a trapezoidal horizontal cross section as shown in FIG. 2, the end faces thereof are in contact with each other, and the structure is such that they cannot fall inside. Have been.

As shown in FIGS. 4, 5, and 6, a large number of square projections 16 are provided on the inner surface of the refractory material 1, and a line-shaped portion is formed between the projections 16 in a groove shape. The heating element 9 was fitted in the fitted state, and the fired product stored in the firing furnace hit the projection 16 to prevent direct contact with the heating element 9 and extended the end toward the lower end. In this state, it is fixed by a guide (not shown) so as not to come off. Since the heating element 9 expands and contracts due to heat generation, a guide for attachment to the refractory material 1 is not provided at the upper and lower U-bent portions of the heating element 9 so as to escape the difference in extension with the refractory material 1. . Also, a large number of square projections 16 are provided on the upper surface of the bottom heat insulating material 3, and a linear heating element 9 is fitted in a groove-shaped portion between them. Since the fired material stored in the inside hits the protruding portion 16, it is prevented from directly contacting the heating element 9, and a guide (not shown) is provided so that the end is extended downward and does not come off. ), But the U-bend of the heating element 9 is not provided with a guide for attachment to the refractory material 1 so as to escape the expansion due to heat generation.

Further, the heating element 9 attached to the side wall refractory material 1 and the bottom refractory material 3 includes a bottom heat insulating material 4 and a bottom plate 13.
The lower end portion penetrates and protrudes from the hole (not shown), and is connected in series with the lower end portion of the adjacent heating element 9 between the bottom plate 13 and the protection plate 14 by a connection fitting 10. The terminals 11 connected to these heating elements 9 are connected to a temperature controller and a power supply (not shown), and are passed through an electric current to set the firing temperature of the firing furnace at a firing temperature at which unfired, fired and overglazed products can be fired. Internal temperature can be controlled.

[0013] The lid of the kiln has a heat insulating material 6 and a refractory material 5 attached to the inside of a lid plate 7 made of a thin steel plate or the like having an opening at the bottom, similarly to the side wall. Toride 1
5, the lid can be easily moved. In addition, a plurality of casters 8 are attached to the lower protective plate 14 of the kiln, so that the whole can be easily moved.

[0014]

As described above, according to the ceramic firing furnace of the present invention, the following effects can be obtained. (1) The inner surface of the firing kiln is an octagonal prism, and the inner area per internal volume is 1.0 when a conventional cylindrical kiln is 1.
There is almost no difference at 55 times, and there is no decrease in firing efficiency because the amount of heat radiation does not change. Also, the inner area ratio is greatly improved as compared with the conventional rectangular kiln, and the firing efficiency is significantly improved. (2) The heating elements are independently attached to a plurality of refractory materials, and adjacent heating elements can be connected at the lower non-heating portion of each side wall, and each refractory material is simply inserted from above without fixing. Because it has a structure that can be made, it can be easily replaced for each refractory material. (3) If the firing temperature is 1400 ° C. or lower, the present invention can be widely applied not only to ceramics but also to firing and drying other materials.

[Brief description of the drawings]

FIG. 1 is a front view of a kiln according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view in which a refractory material to which the heating element of the above embodiment is attached is developed in a frontal shape.

FIG. 4 is a view showing a refractory material of a side wall portion in the embodiment.

FIG. 5 is a view showing a bottom refractory material in the embodiment.

FIG. 6 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side wall part refractory material 2 Side wall part heat insulating material 3 Bottom refractory material 4 Bottom heat insulating material 5 Lid part refractory material 6 Lid part heat insulating material 7 Cover plate 8 Caster 9 Heating element 10 Connection metal fitting 11 Terminal 12 Outer plate 13 Bottom plate 14 Protective plate 15 Handle 16 protrusion

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kai Tokuchika 1-1, Akunouramachi, Nagasaki-shi Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (58) Field surveyed (Int. Cl. ⁷ , DB name) F27B 1 / 09,17 / 00 F27D 11/02

Claims (1)

(57) [Claims] 1. A sintering furnace having an octagonal prism shape, and a heat insulating material and an inside of the octagonal prism-shaped outer plate constituting an outer wall of the sintering kiln. The refractory material with the body attached to the inner surface is detachably superimposed and mounted, and the heat insulating material is also attached to the bottom and the refractory material with the heating element attached to the upper surface is detachably superimposed and mounted inside the bottom. A ceramic kiln characterized by being connected to a series at the non-heating part at the bottom of the kiln.