JPH03204591A - Box for calcination - Google Patents

Abstract

PURPOSE:To permit the employment of a box for calcination commonly for a plurality of calcining furnaces by a method wherein the whole of the boxes for calcination can be arranged so as to have a square shape in a box type calcining furnace by two sets of boxes for calcination, whose side walls are contacted with each other, while the whole of the boxes for calcination can be arranged so as to have an annular shape on a furnace floor in a rotary furnace floor type calcining furnace. CONSTITUTION:A box for calcination 31 is provided with a truncated flat plate section 32 and the lengths of a side 34 and a side 35 are designed so as to be two and three times with respect to the length of a side 33. The box for calcination 31 is provided with side walls 36, 37, 38 and the heights of the side walls 36, 37, 38 are equal respectively. The side wall 36 and the side wall 37 are provided with notches 42 for the inflow of atmosphere gas at opposing positions of the same. When the box 31 for calcination is used for a box type calcining furnace 1, two sets of the boxes for calcination are arranged on respective loading sections 5 of a furnace floor 4 so that the side walls 37 of them are contacted with each other and two sets form a square shape. When the box 31 for calcination is used in a rotary furnace floor type calcining furnace 11, the boxes 31 are arranged so that the side wall 37 of the calcining box 31 is contacted with the side wall 36 of the neighboring calcining box 31 and the whole of the boxes 31 for calcination form an annular shape on the furnace floor 13.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is directed to producing ceramic electronic components such as ceramic condensers in a firing furnace.

The present invention relates to a firing box for storing objects to be fired.

(Prior Art) In general, when manufacturing ceramic electrical parts, the firing method for firing the ceramic object depends on various conditions, such as the firing temperature of the object and the atmosphere of firing scum. Is it used?

Two examples of this type of kiln are shown in Figures 4 and 5, respectively.
As shown in the figure.

55. The furnace 1 is a so-called box electric furnace, and the furnace body 2 has a cubic box shape. Inside the furnace body 2, there are 3 or 3 rows of 8 firing boxes, the structure of which will be explained later, and a mounting section 5 for the firing boxes 3 on the hearth 4. Arranged. Between the furnace walls 2a, 2b of the furnace body 2 and the firing box 3, the firing box 3
Between adjacent rows, a rod-shaped heater 26 made of silicon oxide or the like is arranged in the horizontal direction. And each of the firing boxes 3 in each row,
A ceramic object to be fired (not shown) is housed inside.

) is heated by θ[] from both sides by the F2 salient heater 6. Inside the furnace body 2, the furnace walls 2a, 9b are
Atmosphere scum is injected from the atmosphere scum injecting lower which is opened.

On the other hand, the firing furnace 11 shown in FIG.
It is a rotary hearth type with 13 rotations.

The firing furnace 11 has a cylindrical furnace body 12. A circular rotary door floor 13 is provided in the lower opening of the furnace body 12.
or placed. The soil of this rotary hearth 13 is ceramic.
There are also firing boxes 15, the construction of which will be explained later, for storing objects to be fired (not shown).

1-Record i] Inside the main body 12, atmosphere scum is thrown into the furnace wall 11.

1- While rotating together with the rotary hearth 13, the ceramic object to be fired is suspended from the ceiling of the main body I20b5 toward the 4th circumference and the inner circumference of the rotation 9r-31p313, respectively. It is heated by a heater 16 shaped like a letter.

By the way, in the firing furnace 1 of FIG. 4 and the firing 55 and furnace II of FIG. 5, the shapes of the hearth 4 of the furnace body 2 and the rotary hearth 13 of the furnace body 12 are Depending on the situation, firing boxes with different structures are used.

That is, in the firing furnace 1 shown in FIG. 4, a firing box 3 is used as shown in FIGS. 6(a) to 6(c), respectively, in a plan view, a side view, and a front view. This firing box 3 has side walls 22 and 22 rising from two opposing long sides of a rectangular flat plate portion 210, and each side wall 22 is provided with a notch 23 for the inflow of atmospheric scum.

As shown in FIG.
They are placed in a line on the zero placement section 5 and stacked in three tiers.

The firing furnaces shown in No.j, No. 5, and No.
? (c)i, its plan view, (i!!I i?i′iI
＞ and iE surface layer 4 shown respectively]
5 is used. This firing plate 15 has an arcuate flat plate portion 24 having an opening angle that is obtained by dividing the floor surface of the rotary hearth 13 shown in FIG. 5 into equal intervals. This flat plate part 24
The side walls 2 are attached to an example of the flat plate portion 24 from two sides of the
5.25 or so. These side walls 25 and 26 are provided with cutouts 26 for atmospheric gas circulation.

The firing box 15 is placed on the rotary hearth 13 of the fifth firing furnace 11 along with other firing boxes 15 around the center of rotation, and stacked in multiple stages.

(t is J, '+--problem to be solved) By the way, is it possible to use the firing box 3 having the above-mentioned configuration as shown in Fig. 4? It can only be used for the filler 1 11 shown in FIG.

Also: The box 15 for firing can be used in the firing furnace 11 shown in Figure 5.
M-jou, also known as ``I can't do it.''

In this way, conventional fired I-boxes have different specifications and characteristics of the firing furnace. f
A dedicated device was required depending on the structure inside the L7E main body, heating method, etc. For this reason, it is necessary to stock a dedicated firing box for each firing furnace, which increases the cost of firing boxes and requires a large space to store the firing boxes. There was a problem.

An object of the present invention is to provide a firing box that can be shared by multiple firing furnaces having different structures.

(Means for Solving the Problems) Therefore, the present invention provides a method for firing objects placed on the hearths of multiple types of firing furnaces having different structures and housed therein. The box has a trapezoidal shape, and has one hypotenuse side that is equal to one end of the first side, which is the upper base, and one end of the second side, which is the lower base, which is longer than the first side. a flat plate portion having a third side substantially perpendicular to the first side and the second side; a first side wall rising from the third side of the flat plate portion; and the other end of the first side. 1-
a second side wall extending from the first side to near the second side; and a third side wall rising from the other end of the second side and in the vicinity thereof with a gap between the second side wall and the second side wall. and notches provided at opposite positions of the first and second side walls.

(Function) In a box-shaped firing furnace, the above-mentioned 6 second side walls and the 2
With a single firing box, the entire firing box can be used to form a rectangular cedar shape on the hearth. It touches the first side wall of the box,...!
The entire body of the 氭１檊用婣 forms a ring shape on the hearth.

(Achievements of the invention) According to the present invention! Configuration) By changing the box set of the firing box according to 7i, it is possible to create a
Since it can be shared with the agglomeration case, there are fewer types of firing boxes, the number of firing boxes that must be kept in stock is also reduced, and the 1V pipe space for firing boxes is also reduced. It gets colder.

Further, according to the present invention, when the firing boxes are arranged in a circle on the hearth of the rotary hearth type firing furnace, the fourth
The gap between the second side wall and the third side wall of each firing jar is longer than the third side of the firing jar next to it. Since the second side of the flat plate part of the box protrudes outward, this protruding part stirs the atmosphere inside the furnace body to make it uniform, and when the hearth rotates, the atmosphere scum is removed from the gap between each firing. Atmospheric gas can be uniformly supplied to the objects to be fired that are taken into the firing jars and housed inside each firing jar, making it possible to obtain ceramic products with excellent characteristics and quality.

(Example) The following is an explanation of the embodiment of 4-9 with reference to the drawings in appendix (t).

A plan view, a side view, and a city view of an example of a firing box according to the present invention are shown in FIGS. 1(a) to 1(C), respectively. The flat plate part 32 has a trapezoidal flat plate part 32, which has one end of a first side 33 which is the upper base of the trapezoid and one end of a second side 34 which is the lower base of the trapezoid which is longer than the first side 33. The third side 3 forming one hypotenuse of the trapezoid connecting
5 is approximately perpendicular to the first side 33 and the second side 341. The lengths of the first to third sides 33.3.4 and 35 are, for example, the length of the first side 33, the length of the second side 34 and the length of the third side 35. The lengths are set to 2 and 3, respectively.

The first to third side walls 36.3
7 and 38.

Said first side wall 36. Well, firing box 310 flat plate part 32
One end of the first side 33 of the second side 3.40-,
, the third side 3 forming one hypotenuse of the trapezoid connecting one end
5 Mo・ra stands up.

Further, the 1-2 second side wall 37 is the first side wall 37 of the flat plate portion 32.
It rises from the first side 39 forming another oblique side of the trapezoid connecting the other end of the side 33 and the other end of the second side 34.

Further, the '-2 third side wall 38 stands up at the other end of the second side 3□1 of the flat plate portion 32 and in the vicinity thereof, with a gap 41 in between and the second side wall 37.

The heights of the first side wall 36, second side wall 37, and third side wall 38 are equal.

The first and second side walls 36 and 37 are provided with cutouts 42 for inflowing atmospheric waste at substantially opposing positions.

An example in which the firing box 31 of FIGS. 1(a) to 1(c) having the above configuration is used in the box-shaped firing furnace 1 of FIG. 4 is shown in FIGS. 2(a) and 2. Shown in (b).

In addition, in FIG. 2(a) and FIG. 2(b), the fourth
Portions corresponding to the figures are indicated with corresponding reference numerals, and redundant explanations will be omitted.

A hearth 14 is raised and lowered by a lifting means (not shown) such as a screw/jaw, a cow, etc., to an opening provided at the lower part of the furnace body 2 of a box-shaped firing furnace 1. It has three placement parts 5 for firing boxes that protrude from the surface.

On top of the L name mounting portion 5 of the firing box 31 of Atsumi-4, there is either a set of firing boxes 3I consisting of two firing boxes 31.31, or the second It is arranged so as to be in close contact with the side wall 37 of. As a result, the two firing boxes 31
．． 31 is arranged so that its first to third sides 35 form a substantially square shape. Therefore, when several 1v of the above two firing boxes 3131 are placed on the floor, the entire firing box forms a rectangular shape.

Inside the furnace body 2, there is an atmosphere scum 1 which is used to combine the atmosphere scum provided on the furnace walls 2a and 2b. j'
#1': [:j Atmosphere scum is supplied from 7. The exhaust scum generated inside the door body 2 is discharged from an exhaust scum discharge port 9 sunk into the furnace ceiling.

Next, 11. An example in which the 1-shank box 31 shown in Figures 1 (a) to 1 (I), which has a gong structure, is used in the rotary or floor type firing 11 explained in Figure 5. Figure 3 (a
) and Figure 3(b).

In addition, in Figure 3 I (a) and Figure 3 (b),
In the part corresponding to Z-1 in FIG.
and duplicate explanations will be omitted.

The hearth 13 of the firing furnace 11 has a one-length mounting portion 13a for the firing box 3) that protrudes from the hearth surface.

” - Above the mounting portion 13a of the baking box 31 of the hearth 13, as shown by solid lines and dotted lines in FIG. Adjacent firing box 31
The entire firing box 31 forms a ring shape at the hearth I3.

In this way, when the firing boxes 31 are arranged in a circle on the hearth 13 of the rotary hearth type firing furnace 11, the firing boxes 31 are placed on the fourth side 39 of the flat plate part 32 of each baking box 31 or adjacent to it Since it is longer than the third side 35 of the baking box 31, each (the gap 41 between the second side wall 37 and the third side wall 38 of the baking box 3I) or the baking box next to each baking box 31 The second side 34 of the flat plate portion 32 of the box 31 protrudes outward (see Fig. 1(a)).This protruding portion 51 stirs the atmosphere inside the door body 12.
When the atmosphere becomes uniform, when the hearth 13 rotates in one direction, atmospheric debris is taken into each firing box 31 through the gap 41.

To explain the flow of atmospheric gas inside the furnace body 12 of this rotary hearth type firing furnace 11, first, through the atmospheric gas supply port I7 opened in the furnace wall surface of the door body 12, The supplied atmosphere scum stays inside the door body 12.

As mentioned above, into each firing box 31 assembled into a circular box, the flow of atmospheric gas through the opening formed on the second side 344 and the hearth 13 in the direction A. the gap between the second side wall 37 and the third side wall 38 by rotating;
Atmosphere sludge flowing in from 11 is generated. And this is the atmosphere that left the inside of the firing furnace 11!
#: He is housed in the furnace 11 and comes in contact with Hirodai 1'2.

In addition, a part of the atmosphere scum flows into the two adjacent firing boxes 31 through the notch portions 42 formed in the first side wall 36 and the second side wall 37 .

Then, the atmospheric residue that flows into the first box 31 as described above comes into contact with the baked leather product, and then reaches the first side 33 of the flat plate part of the first box 31. It flows into the center of the furnace body 12 through the upper opening and is discharged to the outside of the furnace body 12 through an exhaust gas discharge port 18 formed in the ceiling of the furnace body 12 .

This series of exhaust gas flow allows atmospheric gas to be evenly supplied to the objects to be fired housed inside each firing box 31, making it possible to obtain ceramic products with excellent characteristics and quality.

As described above, by changing the box assembly of the firing box depending on the firing furnace, it can be used in common with a plurality of firing furnaces having different structures.

[Brief explanation of drawings]

FIG. 1(a), FIG. 1(b) and FIG. 1(c) are a plan view, a side view and a front view of an embodiment of a firing box according to the present invention, and FIG. a) and FIG. 2(b) are a cross-sectional view and a vertical cross-sectional view of a box-shaped firing furnace showing the state in which the firing box of FIG. 1 (a> to FIG. 1(c) is used); Figures 3(a) and 3(b) are a cross-sectional view and a vertical cross-sectional view of a rotary hearth type kiln using the rice fields shown in Figures 1(a) to 1(c). Figure 4 is a cross-sectional view of a box-shaped firing furnace using a conventional firing box. Figure 5 is a cross-sectional view of a rotary hearth type firing furnace using a conventional firing box. Figure 6(a), Figure 6(b) and Figure 6(c) are respectively a plan view, side view and front view of a conventional firing box, Figure 7(a), Figure 7(b) and FIG. 7(c) is a plan view, a side view, and a front view of another conventional firing box, respectively. 1 firing furnace, 2 furnace body, 4 hearth 11 (component furnace, 12 furnace body, 13. ...Rotating hearth. 21...r plate part, 31 firing box, 32 flat plate part 33
First side, 34... Second side 35... Third side, 36... First side wall 37 Second side wall, 38 Third side wall 739 First side, 11 Gap, 42-... Notch portion 51 Projecting portion. Figure 1 (0) 6 Figure 1 (b) ro Figure 6 (C) Figure 6 (0) Figure 6 (b) Figure 7 Figure 7 (01 1b) Do9 b 6

Claims (1)

[Claims] (1) A firing box that is placed on the hearth of multiple types of firing furnaces having different structures and used to fire the objects to be fired stored therein, which has a trapezoidal shape and has an upper base. A third side forming one of the hypotenuses connecting one end of a certain first side and one end of a second side, which is a lower base longer than this first side, is the first side and the second side. a first side wall rising from the third side of the flat plate part, and another oblique side connecting the other end of the first side and the other end of the second side. a second side wall that rises from a fourth side forming a shape and reaches near the second side from the first side, and the other end of the second side with a gap between the second side wall and the vicinity thereof; 1. A firing box comprising: a third side wall rising upright; and a notch provided at substantially opposing positions of the first and second side walls.