JPH1137662A - Baking device of plate to be baked - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously bake a plurality of plates to be baked with uniform quality, by eliminating the contact resistance with an inner bottom surface of a baking furnace or a crucible of the plates to be baked to unify the force to be applied to the plates to be baked. SOLUTION: A baking device is provided with a holding block 13 having a perpendicular surface 13 which is arranged on each side of a plurality of plates 12 to be baked arranged in a baking furnace or a crucible 11 in an upright condition, and an upwardly inclined surface 13b formed on the opposite side thereto, and a block 14 for a pair of weights having a downwardly inclined surface 14b arranged on each side of the holding block and an end face 14a formed in contact with an inner wall of the crucible 11. A receiving plate for the plate to be baked of the same material as that of the plate 12 to be baked is provided between an inner bottom surface 11a of the crucible 11 and a lower end face of a plurality of plates 12 to be baked. The receiving plate 16 and a pair of holding blocks 13 are placed on the inner bottom surface 11a of the crucible through a plurality of small balls 17, and a plurality of projecting bars are preferably formed on the upwardly inclined surface 13b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintering apparatus for sintering a plate-like object made of various ceramics and heat-treating the object.

[0002]

2. Description of the Related Art When a plate-shaped object to be fired is fired using a firing jig for a flat plate, if the object to be fired is small, it is arranged in a firing furnace or a crucible, and is arranged in an upward direction for each item. Is done. On the other hand, when the plate to be fired is large, it is fired in a state where a plurality of sheets are stacked. When a plurality of plates to be fired are fired at a time in a state where a plurality of the plates to be fired are vertically stacked, the load applied at the time of firing differs between the plate to be fired located below and the plate to be fired located above. There is a problem that the quality of the plate varies. In order to equalize the load applied during firing, it is conceivable to use a firing base plate with a groove and to fire a plurality of plates to be fired in the grooves. There is a problem that cannot be prevented.

In order to solve these problems, conventionally, as shown in FIG. 4, a plurality of plates 2 to be fired are erected and arranged on both sides of the plurality of plates 2 to be fired. A firing jig 1 is proposed in which a weight member 5 having a slope 6 is placed on a side opposite to a vertical surface slidable with the surface of the plate 2 to be fired, and a fixing member 4 having a slidable slope 7 inside on the slope 6 is provided. (JP-A-5-296670). In this firing jig 1, when a plurality of fired plates 2 are erected and fired side by side, as the fired plate 2 is heated and contracted,
The weight members 5 on both sides thereof are lowered by their own weight along the slope 7 of the fixing member 4, so that the plurality of fired plates 2 arranged vertically by the force are pushed from both sides. . For this reason, the plurality of fired plates 2 arranged vertically are always supported from both sides, and it is expected that the deformation is suppressed without falling down and the plurality of fired plates are fired simultaneously. ing.

[0004]

However, according to the jig 1 described above, the weight members 5 on both sides of the plurality of fired plates 2 arranged vertically stand on the slope of the fixing member 4 in accordance with the heat shrinkage of the fired plate 2. 7, the weight member 5
Is not in contact with the plate 2 to be fired, and the force to press the plurality of plates 2 from both sides is not uniformly applied to the plate 2 to be fired. In addition, since the lower end surfaces of the plurality of fired plates 2 arranged vertically are in contact with the inner bottom surface 3 of the firing furnace or crucible, the movement caused by the heat shrinkage of the fired plate 2 causes the contact resistance with the inner bottom surface 3. There is also a risk of being hindered by force. The object of the present invention is to eliminate the contact resistance between the plate to be fired and the inner bottom surface of the firing furnace or crucible, to make the force applied to the plate to be fired uniform, and to fire a plurality of plates to be fired simultaneously with uniform quality. An object of the present invention is to provide an apparatus for firing a plate.

[0005]

The invention according to claim 1 is
As shown in FIG. 1, a vertical surface 1 which is disposed on both sides of a plurality of fired plates 12 arranged vertically inside a firing furnace or crucible 11 and which is formed to be in close contact with both ends of the fired plate 12.
3a and a pair of holding blocks 13, 13 having an upwardly inclined surface 13b formed on the opposite side to the vertical surface 13a;
A downwardly inclined surface 14b, which is disposed on both sides of the pair of holding blocks 13, 13 and is formed at the same inclination angle as the upwardly inclined surface 13b, is formed on the opposite side to the downwardly inclined surface 14b and is formed so as to be able to contact the inner wall of the crucible 11. And a pair of weight blocks 14 and 14 having an end surface 14a formed between the inner bottom surface 11a of the crucible 11 and the lower end surfaces of the plurality of plates 12 to be fired. This is a firing device for a plate to be fired provided with a plate receiving plate 16.

By firing a plurality of plates 12 to be fired side by side on a receiving plate 16, a plurality of plates 12 can be fired simultaneously by a single firing operation. The pair of weight blocks 14, 14 disposed on both sides of the holding blocks 13, 13 are moved by their own weight to move the holding block 13, and the plurality of fired plates 12 arranged upright shrink under heat. When pushing, it pushes with uniform force from both sides via a pair of holding blocks 13 and 13.
The receiving plate 16 contracts at the same speed and rate as the contraction of the fired plate 12 during firing, and eliminates the contact resistance generated between the fired plate 12 and the inner bottom surface 11a of the firing furnace or crucible 11.

The invention according to claim 2 is the invention according to claim 1, wherein the receiving plate 16 and the pair of holding blocks 13,
Reference numeral 13 denotes a firing apparatus for firing a plate to be fired placed on the inner bottom surface 11a of the firing furnace or crucible 11 via a plurality of small balls 17. The small balls 17 facilitate the contraction of the receiving plate 16 and the movement of the holding block 13 during the firing of the plate 12 to be fired. The invention according to claim 3 is the invention according to claim 1 or 2, and as shown in FIG.
This is a firing apparatus for a plate to be fired, in which a plurality of ridges 13c are formed in b along an inclined direction. By forming the plurality of ridges 13c on the holding block 13, only the vertices of the ridges 13c contact the downwardly inclined surface 14b of the weight block 14, and the contact area between the upwardly inclined surface 13b and the downwardly inclined surface 14b. To reduce the sliding resistance generated when the weight block 14 descends by its own weight.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIGS. 1 and 2,
The firing apparatus according to the present invention includes a pair of holding blocks 13, 13 disposed on both sides of a plurality of plates to be fired 12, which are arranged vertically inside the crucible 11, and both sides of the pair of holding blocks 13, 13. And a pair of weighting blocks 14 and 14 arranged at the same time. The holding block 13 includes a vertical surface 13a formed so as to be in close contact with both ends of the plate 12 to be fired, and an upwardly inclined surface 13 formed on the opposite side to the vertical surface 13a.
b, and as shown in FIG. 3, a plurality of ridges 13c are formed on the upwardly inclined surface 13b along the inclined direction. The ridge 13c in the present embodiment has a triangular cross section, and is configured so that its apex contacts a downwardly inclined surface 14b of the weight block 14 described later. The material of the holding block 13 is selected so that the reaction by contact with the plate to be fired 12 is as small as possible, such as MgO, Al ₂ O ₃ , Zr.
O ₂ and artificial graphite are exemplified.

Returning to FIG. 1 and FIG. 2, a pair of weight blocks 14, 14 arranged on both sides of the pair of holding blocks 13, 13 are provided on the upwardly inclined surface 1 of the holding block 13.
Downward inclined surface 14b formed at the same inclination angle as 3b
On the side opposite to the downwardly inclined surface 14b, an end surface 14a formed so as to be able to contact the inner wall of the crucible 11 is formed.
The weight block 14 is configured such that the downwardly inclined surface 14b comes into contact with the upwardly inclined surface 13b of the holding block 13 and moves down by its own weight to move the holding block 13. If the plate 12 to be fired does not exist, the crucible 11 will fall to below the inner bottom surface. Therefore, as shown in the figure, when a plurality of the to-be-fired plates 12 are arranged side by side as shown in FIG.
As a result, as shown in FIG. 2, the position is maintained at a somewhat elevated position.

Between the inner bottom surface of the crucible 11 and the lower end surfaces of the plurality of fired plates 12 arranged vertically, a fired plate receiving plate 16 made of the same material as the fired plate 12 is provided. The receiving plate 16 is formed to have a rectangular outer shape slightly smaller than the rectangular shape formed by the lower end surfaces of the plurality of fired plates 12 arranged vertically, and is disposed on both sides of the plurality of fired plates 12. It is configured to be located between the pair of holding blocks 13, 13. The receiving plate 16 and the pair of holding blocks 13, 13 are placed on the inner bottom surface 11 a of the crucible 11 via a plurality of small balls 17, and the receiving plate 16 and the pair of holding blocks 13, 13 are connected to the inner bottom surface of the crucible 11. 11a is easily moved. The material of the small ball 17 is selected from materials that can withstand the temperature during firing.
_{MgO, Al 2 O 3, ZrO} 2, the diameter composed of a sialon and the like is preferably about 4 to 30 mm.

In the apparatus for firing a plate to be fired configured as described above, when a plurality of the sheets to be fired 12 are erected and fired side by side on a receiving plate 16, the plate to be fired shrinks. In this case, the receiving plate 16 contracts at the same speed and at the same rate as the contraction of the plate 12 to be fired, and the crucible 1 of the plate 12 to be fired.
The contact resistance generated between the inner bottom surface 11a and the inner bottom surface 11a is eliminated. The pair of weight blocks 14, 14 disposed on both sides of the holding blocks 13, 13 are lowered by their own weight as shown by solid arrows in FIG. Block 13 is moved as shown by the broken line in the figure. That is, the pair of weight blocks 14, 14
Has a force that always tends to descend by its own weight, and the force is used to push the plurality of fired plates 12 arranged side by side with a uniform force via a pair of holding blocks 13, 13. Has become.

Block 13 for contraction and holding of receiving plate 16
During the movement, the small ball 17 facilitates the contraction of the receiving plate 16 and the movement of the holding block 13 by rotating, and the plurality of ridges 13c formed on the holding block 13 are formed only at the apex of the ridge 13c. The contact area is reduced by contacting the downwardly inclined surface 14 b of the weight block 14, and the sliding resistance generated when the weight block 14 descends by its own weight is reduced. Although the above embodiment has been described using the crucible 11, a firing furnace may be used instead of the crucible.

[0013]

As described above, according to the present invention, a pair of holding blocks having upwardly inclined surfaces are arranged on both sides of a plurality of plates to be fired which are arranged vertically inside a firing furnace or crucible. Since a pair of weight blocks each having a downwardly inclined surface are arranged on both sides of the pair of holding blocks, a plurality of plates to be fired can be erected and fired side by side. When the plurality of plates to be fired are heated and shrunk, the plates to be fired are pressed by a uniform force from both sides through a pair of holding blocks when the plurality of plates to be fired are heated and shrunk by descending under their own weight. As a result, deformation of the plate to be fired during firing can be suppressed, and the force applied to the plate to be fired can be made uniform.

Further, since a receiving plate having the same material as the plate to be fired is provided between the inner bottom surface of the firing furnace or crucible and the lower end surfaces of the plurality of plates to be fired, the receiving plate is the same as the plate to be fired during firing. At a rate and rate of As a result, the contact resistance generated between the plate to be fired and the inner bottom surface of the firing furnace or crucible can be eliminated, and a plurality of plates to be fired can be simultaneously fired with uniform quality. In addition, if the receiving plate and the pair of holding blocks are placed on the inner bottom surface of the firing furnace or crucible via the plurality of small balls, the small balls can cause the receiving plate to shrink and move the holding blocks during firing of the plate to be fired. Easy to rotate. Furthermore, if a plurality of ridges are formed on the upward slope along the slope direction, only the vertices of the ridge contact the downward slope of the weighting block, and the contact area between the upward slope and the downward slope is reduced. The sliding resistance can be reduced when the weight block is lowered by its own weight.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along the line AA of FIG. 2 showing a firing apparatus of the present invention.

FIG. 2 is a perspective view of the device.

FIG. 3 is a perspective view showing a holding block of the device.

FIG. 4 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Crucible 11a Inner bottom surface 12 Plate to be burned 13 Holding block 13a Vertical surface 13b Upward inclined surface 13c Convex ridge 14 Weight block 14a End surface 14b Downward inclined surface 16 Receiving plate 17 Small ball

Claims (3)

[Claims] 1. A plurality of plates to be fired (12) arranged upright inside a firing furnace or crucible (11), and are formed so as to be in close contact with both ends of the plate to be fired (12). Vertical (1
3a) and a pair of holding blocks (13, 13) having an upwardly inclined surface (13b) formed on the side opposite to the vertical plane (13a), and both sides of the pair of holding blocks (13, 13). And a downwardly inclined surface (14b) formed at the same inclined angle as the upwardly inclined surface (13b), and an inner wall of the firing furnace or crucible (11) formed on the opposite side to the downwardly inclined surface (14b). A pair of weight blocks (14, 1) having an end surface (14a) formed to be
4), wherein a material having the same material as the fired plate (12) is provided between an inner bottom surface (11a) of the firing furnace or crucible (11) and lower end surfaces of the plurality of fired plates (12). An apparatus for firing a plate to be fired, comprising a receiving plate (16) for a firing plate. 2. A receiving plate (16) and a pair of holding blocks (13,
13) through a plurality of small balls (17) said firing furnace or crucible (1)
The apparatus for firing a plate to be fired according to claim 1, wherein the apparatus is placed on the inner bottom surface (11a) of (1). 3. The apparatus for firing a plate to be fired according to claim 1, wherein a plurality of ridges (13c) are formed on the upward inclined surface (13b) along the inclined direction.