JPH0747505B2 - Method of firing ceramic products - Google Patents
Method of firing ceramic productsInfo
- Publication number
- JPH0747505B2 JPH0747505B2 JP27311191A JP27311191A JPH0747505B2 JP H0747505 B2 JPH0747505 B2 JP H0747505B2 JP 27311191 A JP27311191 A JP 27311191A JP 27311191 A JP27311191 A JP 27311191A JP H0747505 B2 JPH0747505 B2 JP H0747505B2
- Authority
- JP
- Japan
- Prior art keywords
- burner
- firing
- combustion gas
- product
- ceramic product
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Furnace Details (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、被焼成品であるセラミ
ックス製品に温度ムラを発生させることなく均一に保持
しつつ加熱して、優れた品質のセラミックス製品を得る
ことができるセラミックス製品の焼成方法に関するもの
である。FIELD OF THE INVENTION The present invention relates to firing of a ceramic product, which is a product to be fired, by heating the ceramic product while maintaining it uniformly without causing temperature unevenness to obtain a ceramic product of excellent quality. It is about the method.
【０００２】[0002]
【従来の技術】セラミックス製品の焼成方法として、焼
成炉内温度の均一分布を目的で単窯の焼成炉内にセット
されたセラミックス製品に対して、前記焼成炉の各コー
ナ部に配置したバーナの燃焼ガスを焼成炉内を一定方向
に旋回するよう攪拌噴射させながら加熱する焼成方法が
知られている。2. Description of the Related Art As a method for firing a ceramic product, a ceramic product set in a single kiln firing furnace for the purpose of evenly distributing the temperature in the firing furnace is burned by a burner arranged in each corner of the firing furnace. A firing method is known in which combustion gas is heated while being agitated and sprayed so as to swirl in a firing furnace in a certain direction.
【０００３】ところが、従来のこの種焼成方法において
はバーナの燃焼ガスが焼成炉内にセットされた被焼成品
であるセラミックス製品の外周面に沿って万遍なく流れ
るものの、セラミックス製品の全ての部分がバーナから
等しい距離にあるわけではないので、バーナ近くの燃焼
ガス流が直接当たる部分においては温度が高くなり、一
方バーナから遠く離れて燃焼ガス流が直接当たらない部
分においては温度が低くなって同じ製品内でも不均一に
加熱されるという場合があった。この結果、焼成後に得
られる製品に焼結不良を発生させたり、製品の切れを発
生させたりして品質的に満足なものが得られない場合が
あるという問題点があった。However, in the conventional firing method of this kind, although the combustion gas of the burner flows evenly along the outer peripheral surface of the ceramic product which is the product to be fired set in the firing furnace, all the parts of the ceramic product. Are not equidistant from the burner, so the temperature is higher near the burner where the combustion gas flow hits directly, while it is lower where it is far away from the burner and where the combustion gas flow does not hit directly. In some cases, the same product was heated unevenly. As a result, there is a problem in that a product obtained after firing may have a defective sintering or a product may be cut off, so that a product having satisfactory quality may not be obtained.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記のような
従来の問題点を解決して、被焼成品であるセラミックス
製品に温度ムラを発生させることなく均一に保持しつつ
加熱することができて、焼成後に得られる製品に焼結不
良や切れ等が発生することを確実に防止し、優れた品質
の焼成品を得ることができるセラミックス製品の焼成方
法を提供することを目的として完成されたものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and can heat a ceramic product, which is a product to be fired, while maintaining the temperature evenly without causing temperature unevenness. The present invention has been completed with the object of providing a method for firing a ceramic product that can reliably prevent the product obtained after firing from suffering sintering failure, breakage, etc., and obtain a fired product of excellent quality. It is a thing.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明のセラミックス製品の焼成方法は、
矩形状の焼成炉内にセットされたセラミックス製品に対
して、前記焼成炉の各コーナ部に配置したバーナの燃焼
ガスを焼成炉内を一定方向に旋回するよう噴射させなが
ら加熱するセラミックス製品の焼成方法において、前記
燃焼ガスの旋回方向を周期的に反転させてセラミックス
製品を均一に加熱することを特徴とするものである。The method for firing a ceramic product of the present invention, which has been made to solve the above-mentioned problems, comprises:
Firing of a ceramic product set in a rectangular firing furnace by heating combustion gas of a burner arranged at each corner of the firing furnace while injecting the combustion gas so as to swirl in the firing furnace in a certain direction. In the method, the swirling direction of the combustion gas is periodically reversed to uniformly heat the ceramic product.
【０００６】[0006]
【実施例】次に、本発明を図面を参照しつつ更に詳細に
説明する。図面はセラミックス製品の焼成工程の概略を
示すもので、図中１は単窯からなる矩形状の焼成炉、２
は該焼成炉１内にセットされた被焼成品である未焼結状
態のセラミックス製品、３は焼成炉１の四隅の各コーナ
部に配置された第１のバーナ、４は同じく前記焼成炉１
の四隅の各コーナ部に配置された第２のバーナである。The present invention will now be described in more detail with reference to the drawings. The drawing shows the outline of the firing process for ceramic products. In the figure, 1 is a rectangular kiln consisting of a single kiln, 2
Is an unsintered ceramic product that is a product to be fired set in the firing furnace 1, 3 is a first burner arranged at each corner of the four corners of the firing furnace 1, and 4 is also the firing furnace 1
2 is a second burner arranged at each corner of the four corners of FIG.
【０００７】前記の第１のバーナ３は、例えば燃焼ガス
が焼成炉１内を上面側からみて時計回りの流れとなるよ
うその噴出口を一定方向に揃えて配置されており、一
方、第２のバーナ４は前記第１のバーナ３と隣接する炉
壁に該第１のバーナ３とは燃焼ガス流が反対方向、即ち
上面側からみて反時計回りの流れとなるようその噴出口
を第１のバーナ３とは９０度方向をずらせて、またバー
ナ３とバーナ４はバーナの燃焼ガス流を対向衝突させな
いために同じ高さ位置は避けるよう、例えばバーナ３と
バーナ４はバーナ中心より１００mm〜３００mmずらせて
配置されている。また、図２に示されるように前記第１
のバーナ３および第２のバーナ４は各コーナ部において
複数段配置されており、例えば第１のバーナ３を奇数段
に、第２のバーナ４を偶数段として配置されている。な
お、前記焼成炉１の底面部には排気ファン５に連結され
る吸引ダクト６が開口しており、炉内の雰囲気が適宜外
部へ放出されるよう構成されている。The first burner 3 is arranged, for example, so that the combustion gas flows in a clockwise direction when the combustion gas is viewed from the inside of the firing furnace 1 when viewed from the upper surface side, and the jet ports thereof are aligned in a certain direction, while the second burner 3 The burner 4 of the first burner 4 has a first jet port on the furnace wall adjacent to the first burner 3 so that the combustion gas flow is opposite to the first burner 3, that is, the flow is counterclockwise when viewed from the upper surface side. Of the burner 3 and the burner 3 are shifted by 90 degrees, and the burner 3 and the burner 4 do not collide with each other in the combustion gas flow of the burner, so that the same height position is avoided. It is arranged to be offset by 300 mm. Also, as shown in FIG.
The burner 3 and the second burner 4 are arranged in a plurality of stages in each corner portion, for example, the first burner 3 is arranged in an odd number stage and the second burner 4 is arranged in an even number stage. A suction duct 6 connected to an exhaust fan 5 is opened on the bottom surface of the firing furnace 1 so that the atmosphere in the furnace is appropriately discharged to the outside.
【０００８】本発明においては、先ず第１のバーナ３を
燃焼して該第１のバーナ３より噴出される燃焼ガスを焼
成炉１内で時計回りに旋回させつつセラミックス製品２
を加熱する。次いで、前記第１のバーナ３を消火しある
いは弱めた状態として第２のバーナ４を燃焼し、該第２
のバーナ４より噴出される燃焼ガスを焼成炉１内で反時
計回りに旋回させつつセラミックス製品２を加熱する。
前記第１のバーナ３と第２のバーナ４とは、例えば３０
〜６０秒毎に周期的に燃焼させることによって焼成炉１
内における燃焼ガスの旋回方向を周期的に反転させるも
のであり、このようにセラミックス製品２を加熱するこ
とによって第１のバーナ３から遠く離れて燃焼ガス流が
直接当たらなかった低温部分を第２のバーナ４の燃焼ガ
ス流によって一気に昇温させ、一方、第１のバーナ３に
近くて燃焼ガス流が直接当たった高温部分は第２のバー
ナ４から遠く離して緩慢に昇温させ、以下同様の手順が
繰り返されてセラミックス製品２は全体として温度むら
がなく極めて均一な温度に保持されつつ加熱焼成が行わ
れることとなる。この結果、焼成後に得られた製品には
焼結不良や切れ等がなく優れた品質のセラミックス製品
を得ることができた。なお、前記焼成炉１内の複数個所
にサーモカップリングを設置して炉内の雰囲気温度のバ
ラツキを測定したところ、本発明においては炉内の温度
差は５℃以下であり、従来方法による場合には温度差が
約２０℃であったのに比べて極めて均一な温度分布で加
熱焼成を行えることが確認できた。In the present invention, first, the first burner 3 is burned, and the combustion gas ejected from the first burner 3 is swirled in the firing furnace 1 in the clockwise direction.
To heat. Then, the first burner 3 is extinguished or weakened to burn the second burner 4,
The ceramic product 2 is heated while the combustion gas ejected from the burner 4 is swirled counterclockwise in the firing furnace 1.
The first burner 3 and the second burner 4 are, for example, 30
Firing furnace 1 by periodically burning every ~ 60 seconds
In order to periodically reverse the swirling direction of the combustion gas in the inside, by heating the ceramic product 2 in this way, the low temperature portion far from the first burner 3 and not directly hit by the combustion gas flow is The combustion gas flow of the burner 4 causes the temperature to rise rapidly at one time, while the high temperature portion near the first burner 3 which directly hits the combustion gas flow is gradually moved away from the second burner 4 and so on. By repeating the above procedure, the ceramic product 2 is heated and fired while maintaining an extremely uniform temperature as a whole with no temperature unevenness. As a result, it was possible to obtain a ceramic product of excellent quality without sintering defects or breakage in the product obtained after firing. When thermocouplings were installed at a plurality of locations in the firing furnace 1 to measure variations in the atmospheric temperature in the furnace, the temperature difference in the furnace in the present invention was 5 ° C. or less. It was confirmed that the heating and firing can be performed with an extremely uniform temperature distribution as compared with the case where the temperature difference was about 20 ° C.
【０００９】[0009]
【発明の効果】以上の説明からも明らかなように本発明
は、被焼成品であるセラミックス製品に温度ムラを発生
させることなく均一に保持しつつ加熱することができ
て、焼成後に得られる製品に焼結不良や切れ等が発生す
ることを確実に防止し、優れた品質の焼成品を得ること
ができるとともに、更には、均一な加熱状態を維持しつ
つ経済的に焼成処理を行うことができるという利点も有
する。よって本発明は従来の問題点を一掃したセラミッ
クス製品の焼成方法として、産業の発展に寄与するとこ
ろは極めて大である。EFFECTS OF THE INVENTION As is clear from the above description, the present invention is capable of heating a ceramic product, which is a product to be fired, while maintaining it uniformly without causing temperature unevenness. It is possible to reliably prevent the occurrence of sintering defects, breakage, etc., and obtain a fired product of excellent quality, and further, to perform the firing treatment economically while maintaining a uniform heating state. It also has the advantage that it can. Therefore, the present invention is extremely useful as a method for firing a ceramic product that eliminates the conventional problems and contributes to industrial development.
【図１】本発明の実施例を示す切欠平面図である。FIG. 1 is a cutaway plan view showing an embodiment of the present invention.
【図２】本発明の実施例を示す切欠正面図である。FIG. 2 is a cutaway front view showing an embodiment of the present invention.
１ 焼成炉 ２ セラミックス製品 ３ 第１のバーナ ４ 第２のバーナ 1 Firing Furnace 2 Ceramics Product 3 First Burner 4 Second Burner
Claims (1)
ックス製品に対して、前記焼成炉の各コーナ部に配置し
たバーナの燃焼ガスを焼成炉内を一定方向に旋回するよ
う噴射させながら加熱するセラミックス製品の焼成方法
において、前記燃焼ガスの旋回方向を周期的に反転させ
てセラミックス製品を均一に加熱することを特徴とする
セラミックス製品の焼成方法。1. A ceramic product set in a rectangular firing furnace is heated while injecting combustion gas of burners arranged at respective corners of the firing furnace so as to swirl in the firing furnace in a certain direction. The method for firing a ceramic product according to claim 1, wherein the direction of swirling of the combustion gas is periodically reversed to uniformly heat the ceramic product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27311191A JPH0747505B2 (en) | 1991-09-25 | 1991-09-25 | Method of firing ceramic products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27311191A JPH0747505B2 (en) | 1991-09-25 | 1991-09-25 | Method of firing ceramic products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0585802A JPH0585802A (en) | 1993-04-06 |
| JPH0747505B2 true JPH0747505B2 (en) | 1995-05-24 |
Family
ID=17523286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27311191A Expired - Fee Related JPH0747505B2 (en) | 1991-09-25 | 1991-09-25 | Method of firing ceramic products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0747505B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112512728A (en) * | 2020-04-29 | 2021-03-16 | 宁波恒普真空技术有限公司 | Bidirectional atmosphere control process and bidirectional atmosphere sintering furnace |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4524951B2 (en) * | 2001-05-09 | 2010-08-18 | 株式会社村田製作所 | Heat treatment furnace and gas supply method for heat treatment furnace |
| JP2007315699A (en) * | 2006-05-26 | 2007-12-06 | Asahi Glass Co Ltd | Furnace interior heating method and furnace interior heating device |
| JP2011208880A (en) * | 2010-03-30 | 2011-10-20 | Shinnetsu Kogyo Kk | Heating treatment device |
-
1991
- 1991-09-25 JP JP27311191A patent/JPH0747505B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112512728A (en) * | 2020-04-29 | 2021-03-16 | 宁波恒普真空技术有限公司 | Bidirectional atmosphere control process and bidirectional atmosphere sintering furnace |
| WO2021217474A1 (en) * | 2020-04-29 | 2021-11-04 | 宁波恒普真空技术有限公司 | Bidirectional atmosphere control process and bidirectional atmosphere sintering furnace |
| CN112512728B (en) * | 2020-04-29 | 2023-02-10 | 宁波恒普真空科技股份有限公司 | Bidirectional atmosphere control process and bidirectional atmosphere sintering furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0585802A (en) | 1993-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19951212 |
|
| LAPS | Cancellation because of no payment of annual fees |