JP3440981B2 - Sintering device for plate to be fired - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for firing a plate to be fired, which heats and heats a plate-shaped object made of various ceramics.

[0002]

2. Description of the Related Art When a plate-like object to be fired of this kind is fired by using a flat plate firing jig, when the object to be fired is small, it is placed in a firing furnace or crucible so that the individual articles are arranged in an upward direction and fired. To be done. On the other hand, when the plate to be fired is large, a plurality of sheets are fired in a stacked state. When a plurality of sheets to be fired are stacked at once in the vertical direction, the load applied at the time of firing is different between the sheets to be fired below and the sheets to be fired above, and the firing after firing is different. There is a problem that the quality of the plate varies. Also, in order to make the load applied during baking uniform, it is conceivable to use a baking base plate with grooves and stir a plurality of plates to be baked in the grooves. There is a problem that cannot be prevented.

In order to solve these problems, as shown in FIG. 4, conventionally, a plurality of sheets 2 to be fired are vertically arranged, and both sides of the plurality of sheets 2 to be fired are lined up on the stand. A baking jig 1 having a weight member 5 having an inclined surface 6 on the side opposite to the vertical surface that can slide with the surface of the plate to be fired 2 and a fixing member 4 having slidable inclined surfaces 7 inside is proposed. (Japanese Patent Laid-Open No. 5-296670). In this firing jig 1, when a plurality of fired plates 2 are stood side by side and fired, as the fired plates 2 are heated and shrink,
The weight members 5 on both sides thereof are lowered by their own weight along the sloped surface 7 of the fixing member 4, so that the plurality of plates 2 to be fired and arranged side by side by the force are pushed from both sides. . Therefore, the plurality of fired plates 2 arranged upright are always supported from both sides, and it is expected that the plurality of fired plates 2 will be fired at the same time without being fallen down and deformation will be suppressed. ing.

[0004]

However, in the jig 1 described above, the weight members 5 on both sides of the plurality of plates to be fired 2 which are vertically arranged in accordance with the heat shrinkage of the plates to be fired 2 are the slopes of the fixing member 4. Since it is necessary to descend along 7, it is inevitable that the weight member 5
The lower part of No. 1 is not in contact with the plate 2 to be fired, and the force for pushing the plurality of plate 2 to be fired from both sides is not uniformly applied to the plate 2 to be fired. Further, since the lower end surfaces of the plurality of plates to be fired 2 arranged upright are in contact with the inner bottom surface 3 of the firing furnace or the crucible, the movement of the plates to be fired 2 due to heat shrinkage causes a contact resistance with the inner bottom surface 3. It may be 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, and to make the force applied to the plate to be fired uniform so that a plurality of plates can be fired with uniform quality at the same time. An object is to provide a plate baking apparatus.

[0005]

The invention according to claim 1 is
As shown in FIG. 1, a vertical plane 1 formed on both sides of a plurality of plates 12 to be fired standing upright inside a firing furnace or crucible 11 and formed in close contact with both ends of the plates 12 to be fired.
3a and a pair of holding blocks 13 and 13 each having an upward inclined surface 13b formed on the opposite side of the vertical surface 13a,
It is arranged on both sides of the pair of holding blocks 13, 13 and is formed on the opposite side of the downward inclined surface 14b and the downward inclined surface 14b formed at the same inclination angle as the upward inclined surface 13b, and is formed so as to be able to contact the inner wall of the crucible 11. And a pair of weighting blocks 14 and 14 each having an end face 14a, and between the inner bottom surface 11a of the crucible 11 and the lower end faces of the plurality of to-be-sintered plates 12, the to-be-sintered plate 12 is made of the same material. This is a device for baking a plate to be baked, which is provided with a plate receiving plate 16.

[0006] By firing a plurality of fired plates 12 standing on the receiving plate 16 side by side, it is possible to fire a plurality of fired plates simultaneously by one firing operation. The pair of weighting blocks 14 and 14 arranged on both sides of the holding blocks 13 and 13 are moved by their own weight so as to move the holding block 13, and the plurality of fired plates 12 arranged upright are heat-shrinked. In doing so, it is pushed with a uniform force from both sides via the pair of holding blocks 13, 13.
The receiving plate 16 contracts at the same rate and ratio as the contraction of the plate to be baked 12 during baking, and eliminates the contact resistance force generated between the plate to be baked 12 and the inner bottom surface 11a of the baking furnace or the 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 is a baking furnace or a baking apparatus for baking a plate placed on the inner bottom surface 11a of the crucible 11 through 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 baking of the plate 12 to be baked. The invention according to claim 3 is the invention according to claim 1 or 2, and as shown in FIG.
This is a baking apparatus for a plate to be baked in which a plurality of convex stripes 13c are formed in b along the inclination direction. By forming a plurality of ridges 13c on the holding block 13, only the apexes of the ridges 13c contact the downward slope 14b of the weighting block 14, and the contact area between the upward slope 13b and the downward slope 14b. To reduce the sliding resistance generated when the weighting block 14 descends due to its own weight.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2,
The firing apparatus of the present invention includes a pair of holding blocks 13 and 13 arranged on both sides of a plurality of plates 12 to be fired which are vertically arranged inside the crucible 11, and both sides of the pair of holding blocks 13 and 13. And a pair of weighting blocks 14 and 14 arranged in the. The holding block 13 has a vertical surface 13a formed in close contact with both ends of the plate 12 to be fired, and an upward inclined surface 13 formed on the opposite side of the vertical surface 13a.
As shown in FIG. 3, a plurality of ridges 13c are formed on the upward inclined surface 13b along the inclination direction. The ridge 13c in the present embodiment has a triangular cross section, and its apex is configured so as to come into contact with the downward inclined surface 14b of the weighting block 14 described later. The material of the holding block 13 is selected so that the reaction with the plate 12 to be fired is minimal as much as possible. MgO, Al ₂ O ₃ , Zr
O ₂ and artificial graphite are exemplified.

Referring back to FIGS. 1 and 2, the pair of weighting blocks 14 and 14 disposed on both sides of the pair of holding blocks 13 and 13 are the upwardly inclined surface 1 of the holding block 13.
Downwardly inclined surface 14b formed at the same inclination angle as 3b
Then, an end surface 14a formed so as to be in contact with the inner wall of the crucible 11 is formed on the side opposite to the downward inclined surface 14b.
The weighting 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 downward by its own weight to move the holding block 13, and a plurality of standing blocks are arranged. Without the plate 12 to be fired, the crucible 11 would fall below the inner bottom surface. Therefore, when a plurality of plates 12 to be fired are arranged upright as shown in FIG.
2, it will be retained in a raised position as shown.

Between the inner bottom surface of the crucible 11 and the lower end surfaces of the plurality of fired plates 12 which are vertically arranged, a receiving plate 16 of the fired plate made of the same material as the fired plates 12 is provided. The receiving plate 16 is formed to have a rectangular outer shape that is slightly smaller than the quadrangular shape formed by the lower end surfaces of the plurality of fired plates 12 that are vertically arranged, and is arranged 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 11a 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 formed on the inner bottom surface of the crucible 11. 11a is easily moved. The material of the small balls 17 is selected so that it can withstand the temperature during firing.
It is preferable to use MgO, Al ₂ O ₃ , ZrO ₂ , sialon or the like having a diameter of about 4 to 30 mm.

In the baking apparatus for baking the plate to be fired as described above, when a plurality of the plates to be baked 12 are stood on the receiving plate 16 side by side and baked, the plates to be baked 12 are heated and contract. In this case, the receiving plate 16 contracts at the same rate and rate as the contraction of the plate to be fired 12, and the crucible 1 of the plate to be fired 12 is contracted.
The contact resistance generated between the inner bottom surface 11a and the inner bottom surface 11a of 1 is eliminated. Further, the pair of weighting blocks 14 and 14 disposed on both sides of the holding blocks 13 and 13 are lowered by their own weight as shown by solid arrows in FIG. The block 13 is moved as shown by the broken line in the figure. That is, the pair of weighting blocks 14, 14
Has a force to constantly descend due to its own weight, and the force causes the plurality of fired plates 12 arranged side by side to be pushed by a uniform force from both sides via a pair of holding blocks 13 and 13. Has become.

Block 13 for contracting and holding the receiving plate 16
At the time of the movement, the small balls 17 facilitate the contraction of the receiving plate 16 and the rotation of the holding block 13 by rotating, and the plurality of ridges 13c formed on the holding block 13 are only apexes of the ridges 13c. The contact area with the downwardly inclined surface 14b of the weighting block 14 is reduced, and sliding resistance generated when the weighting block 14 descends due to its own weight is reduced. Although the crucible 11 is used in the above embodiment, 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 upward inclined surfaces are arranged on both sides of a plurality of plates to be fired which are vertically arranged inside the firing furnace or crucible. However, since a pair of weighting blocks having a downward inclined surface is arranged on both sides of the pair of holding blocks, it becomes possible to stand and fire a plurality of sheets to be fired, and a pair of weights is placed. When the plurality of plates to be fired, which are vertically arranged by being lowered by its own weight, shrink due to heat, the plates to be fired are pressed from both sides by a uniform force through the pair of holding blocks. As a result, the 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 the receiving plate having the same material as the plate to be fired is provided between the inner bottom surface of the firing furnace or the crucible and the lower end faces of the plurality of plates to be fired, the receiving plate is the same as the plate to be fired during firing. Contract at the rate and rate of. As a result, it is possible to eliminate the contact resistance generated between the plate to be fired and the inner bottom surface of the firing furnace or the crucible, and to fire a plurality of plates to be fired at the same time with uniform quality. Further, if the receiving plate and the pair of holding blocks are placed on the inner bottom surface of the firing furnace or crucible through the plurality of small balls, the small balls can shrink the receiving plate and move the holding block during baking of the plate to be fired. Make it easier by rotating. Furthermore, if a plurality of ridges are formed along the sloping direction on the upward sloping surface, only the apexes of the ridges contact the downward sloping surface of the weighting block, and the contact area between the upward sloping surface and the downward sloping surface is increased. It is possible to reduce the sliding resistance which is generated when the weighting block is lowered by its own weight.

[Brief description of drawings]

FIG. 1 is a sectional view taken along 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 apparatus.

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

[Explanation of symbols]

11 crucibles 11a inner bottom surface 12 Plate to be fired 13 Holding block 13a Vertical plane 13b upward slope 13c convex stripe 14 Weighting block 14a end face 14b downward slope 16 Support plate 17 small balls

Front page continuation (56) Reference JP-A-5-296670 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F27D 3/12 C04B 35/64

Claims (3)

(57) [Claims] 1. A firing furnace or crucible (11) is arranged on both sides of a plurality of fired plates (12) standing upright and arranged side by side so as to be adhered to both ends of the fired plate (12). Vertical (1
3a) and a pair of holding blocks (13, 13) having the upward inclined surface (13b) formed on the opposite side of the vertical surface (13a), and both sides of the pair of holding blocks (13, 13) And the downward slope (14b) formed at the same inclination angle as the upward slope (13b) and the opposite side of the downward slope (14b) to the inner wall of the firing furnace or crucible (11). A pair of weighting blocks (14, 1) having an end surface (14a) formed so that
4), and a substrate having the same material as the plate to be fired (12) between the inner bottom surface (11a) of the firing furnace or the crucible (11) and the lower end surface of the plurality of plates to be fired (12). A device for firing a plate to be fired, comprising a receiving plate (16) for the plate to be fired. 2. A receiving plate (16) and a pair of holding blocks (13,
13) is the firing furnace or crucible (1) through a plurality of small balls (17).
The apparatus for firing a plate to be fired according to claim 1, which is placed on the inner bottom surface (11a) of (1). 3. The baking apparatus for a plate to be baked according to claim 1, wherein a plurality of convex stripes (13c) are formed on the upward inclined surface (13b) along the inclination direction.