JPH076739B2 - Firing furnace - Google Patents
Firing furnaceInfo
- Publication number
- JPH076739B2 JPH076739B2 JP4214389A JP4214389A JPH076739B2 JP H076739 B2 JPH076739 B2 JP H076739B2 JP 4214389 A JP4214389 A JP 4214389A JP 4214389 A JP4214389 A JP 4214389A JP H076739 B2 JPH076739 B2 JP H076739B2
- Authority
- JP
- Japan
- Prior art keywords
- fired
- furnace
- furnace body
- hearth
- firing
- 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
- 238000010304 firing Methods 0.000 title claims description 28
- 239000000463 material Substances 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は多段に積み重ねられた匣を回転させつつ匣の内
部に収容されたセラミックの被焼成物を焼成する焼成炉
に関する。Description: TECHNICAL FIELD The present invention relates to a firing furnace for rotating ceramic boxes to be fired, which are housed inside the boxes while rotating the boxes that are stacked in multiple stages.
［従来の技術］ 一般に、焼成炉には、セラミックの被焼成物を連続的に
処理するトンネル炉方式のものと、セラミックの被焼成
物をバッチ処理するバッチ炉方式のものとがある。[Prior Art] In general, there are two types of firing furnaces: a tunnel furnace type that continuously processes a ceramic object to be fired and a batch furnace method that batch-processes a ceramic object to be fired.
従来より、バッチ炉方式の焼成炉としては、堅形のもの
が周知であり、さらに、堅形の焼成炉には、被焼成物が
収容される匣が多段に積み重ねられる炉床が回転するも
のと回転しないものとがある。BACKGROUND ART Conventionally, as a batch furnace type baking furnace, a solid type is well known, and further, in the solid type baking furnace, a hearth in which boxes for accommodating objects to be fired are stacked in multiple stages is rotated. There are some that do not rotate.
炉床回転式の焼成炉では、個々の被焼成物の焼成条件が
均一になり、被焼成物の焼成によって得られる焼成品の
品質のばらつきは小さくなるが、炉床が回転するもので
あるので、一度に炉床上に積み重ねることのできる匣の
数が比較的少なく、スペース生産性は低い。In the hearth rotary firing furnace, the firing conditions of the individual objects to be fired become uniform, and the variation in quality of the fired products obtained by firing the objects to be fired is reduced, but since the hearth rotates. , The number of boxes that can be stacked on the hearth at once is relatively small, and space productivity is low.
一方、炉床が回転しないものとしては、たとえば第３図
および第４図に夫々縦断面および横断面を示すようなも
のがある。On the other hand, examples of those in which the hearth does not rotate include those whose longitudinal section and transverse section are shown in FIGS. 3 and 4, respectively.
上記焼成炉１はいわゆる炉床昇降式のものである。上記
焼成炉１の炉本体２は、セラミックの被焼成物３が収容
された匣４を出し入れするための開口2aを下部に有す
る。上記匣４としては、たとえば200mmないし250mm角の
寸法を有する正方形状のものが使用される。上記炉本体
２は、その開口2aに対して、図示しない油圧シリンダも
しくは電気モータにより駆動されて昇降する炉床５を備
えている。この炉床５の上に載置された台板６の上に
は、その中心のまわりに90度の角度間隔をおいて各位置
に、上記匣４が多段に積み重ねられる。そして、炉床５
が上昇し、その上に多段に積み重ねられた上記匣４が上
記開口2aより炉本体２の内部に挿入される。上記匣４内
の被焼成物３は、焼成炉１の炉本体２の内側壁に沿い匣
４の積み重ね高さに合せて井桁状に組んだ、炭化硅素
（SiC）質の棒状ヒータ７からの熱を受けて焼成され
る。The firing furnace 1 is of a so-called hearth lifting type. The furnace body 2 of the baking furnace 1 has an opening 2a at the bottom for inserting and removing the box 4 in which the ceramic to-be-baked object 3 is stored. As the box 4, for example, a square one having a size of 200 mm to 250 mm square is used. The furnace body 2 is provided with a hearth 5 which is moved up and down by an unillustrated hydraulic cylinder or an electric motor with respect to the opening 2a. On the base plate 6 placed on the hearth 5, the boxes 4 are stacked in multiple stages at respective positions with an angular interval of 90 degrees around the center thereof. And the hearth 5
Rises, and the boxes 4 stacked in multiple stages are inserted into the furnace body 2 through the openings 2a. The material to be fired 3 in the box 4 is formed from a rod-shaped heater 7 made of silicon carbide (SiC), which is arranged in a cross shape along the inner wall of the furnace body 2 of the firing furnace 1 in accordance with the stacking height of the box 4. It is baked by receiving heat.
［発明が解決しようとする課題］ ところで、上記従来の焼成炉１では、炉床５の台板６の
積重ね位置により各匣４の上記棒状ヒータ７に対する位
置が決まってしまい、上記各棒状ヒータ７から各匣４内
の被焼成物３までの距離が個々の被焼成物３によって異
なる。また、上記従来の焼成炉１では、炉本体２内に
は、炉本体２の炉壁2bもしくは天井部2cに設けられた保
護雰囲気ガスの投入孔（図示せず。）から保護雰囲気ガ
スが供給され、炉本体２内にて発生した排気ガスは上記
炉本体２の炉壁2bもしくは天井部2cに設けられた排気孔
（図示せず。）から排出されるが、保護雰囲気ガスは、
単に炉本体２に設けられた保護雰囲気ガスの投入孔から
投入されるだけで、炉本体２の内部での保護雰囲気ガス
の分布に偏りが生じたり、排気ガスが炉本体２の炉床５
近くに淀みやすくなる。[Problems to be Solved by the Invention] In the conventional firing furnace 1, the position of each box 4 with respect to the rod-shaped heater 7 is determined by the stacking position of the base plates 6 of the hearth 5, and the rod-shaped heaters 7 are To the object 3 to be fired in each box 4 varies depending on the individual object 3 to be fired. Further, in the above-described conventional firing furnace 1, the protective atmosphere gas is supplied into the furnace body 2 from a protective atmosphere gas inlet hole (not shown) provided in the furnace wall 2b or the ceiling portion 2c of the furnace body 2. The exhaust gas generated in the furnace body 2 is discharged from an exhaust hole (not shown) provided in the furnace wall 2b or the ceiling portion 2c of the furnace body 2, but the protective atmosphere gas is
By simply introducing the protective atmosphere gas through the protective atmosphere gas introduction hole provided in the furnace body 2, the protective atmosphere gas is unevenly distributed inside the furnace body 2, and the exhaust gas is discharged from the furnace floor 5 of the furnace body 2.
It's easier to stay nearby.
このため、各匣４の炉本体２内での位置および各匣４内
での被焼成物３の位置によって、被焼成物３の焼成条件
が異なり、被焼成物３の焼成によって得られる焼成品に
焼結ばらつきが生じ、焼成品に品質ばらつきが生じると
いう問題があった。For this reason, the firing conditions for the article to be fired 3 differ depending on the position of each box 4 in the furnace body 2 and the position of the article to be fired 3 in each box 4, and a fired product obtained by firing the article to be fired 3 There is a problem in that there is variation in sintering, and variation in quality of the fired product.
本発明の目的は、炉内温度のばらつきが小さく、かつ、
炉内保護雰囲気を均一に保つことができ、品質のばらつ
きの少ない焼成品を得ることができる焼成炉を提供する
ことである。The object of the present invention is to reduce the variation in the furnace temperature, and
It is an object of the present invention to provide a firing furnace which can keep a protective atmosphere in the furnace uniform and can obtain a fired product with less variation in quality.
［課題を解決するための手段］ このため、本発明は、炉本体の炉床上にて台板上に被焼
成物を収容してなる四角形状の匣を多段に積み重ね、こ
れら匣を回転させつつ上記被焼成物を焼成する焼成炉に
おいて、 上記炉床の中心のまわりに回転中心がほぼ90度の角度間
隔をおいて位置する４つの回転台と、対角線位置にある
回転台は互いに同じ回転方向に回転駆動する一方、隣り
合う位置にある回転台は互いに逆方向に回転駆動する回
転駆動手段と、上記炉本体の天井から上記炉本体の内側
壁に沿って懸垂し、上記被焼成物を加熱するヒータとを
備えたことを特徴としている。[Means for Solving the Problems] Therefore, according to the present invention, the square-shaped box containing the objects to be fired is stacked in a multi-stage manner on the hearth of the furnace body while rotating these boxes. In the firing furnace for firing the above-mentioned object to be fired, the four rotary bases whose rotation centers are located at angular intervals of about 90 degrees around the center of the hearth and the rotary bases in diagonal positions have the same rotation direction. On the other hand, the rotary bases located adjacent to each other are rotationally driven in opposite directions to each other, and the rotary bases are suspended from the ceiling of the furnace body along the inner side wall of the furnace body to heat the object to be fired. It is characterized in that it is provided with a heater.
また、本発明は、上記匣は一辺の長さがａの正方形状を
有し、隣り合う回転台の回転中心間の距離ｄが であることをいま一つの特徴としている。Further, in the present invention, the box has a square shape whose one side has a length a, and the distance d between the rotation centers of the adjacent rotary bases is Is another feature.
［作用］ 上記各回転台が回転するのに伴って、その上に積み重ね
られた匣が回転する。この回転により、上記ヒータから
各匣内の被焼成物に与えられる熱量は、各被焼成物につ
いてほぼ一定となる一方、炉本体内の雰囲気ガスも撹拌
される。[Operation] As each of the above rotary bases rotates, the boxes that are stacked thereon rotate. By this rotation, the amount of heat given from the heater to the objects to be fired in each box becomes substantially constant for each object to be fired, while the atmospheric gas in the furnace body is also stirred.
［発明の効果］ 本発明によれば、炉床が４つの回転台を有し、炉本体内
にて、各回転台の上に積み重ねられた匣が回転しつつ被
焼成物が焼成されるので、この回転により、上記ヒータ
による各匣内の被焼成物に対する加熱条件が各被焼成物
についてほぼ一定となり、しかも、炉本体内の雰囲気ガ
スも撹拌され、品質のばらつきの少ない焼成品を得るこ
とができる。[Effects of the Invention] According to the present invention, the hearth has four turntables, and in the furnace body, the boxes to be stacked on the turntables are rotated and the object to be fired is fired. By this rotation, the heating conditions for the object to be fired in each box by the heater are almost constant for each object to be fired, and the atmospheric gas in the furnace body is also stirred to obtain a fired product with less variation in quality. You can
また、隣り合う回転台の回転中心間の距離が各回転台が
回転することができる最小の距離となっているので、焼
成炉も形状が小さく、コンパクトなものとなる。Moreover, since the distance between the rotation centers of the adjacent rotary bases is the minimum distance at which each rotary base can rotate, the firing furnace also has a small shape and is compact.
［実施例］ 以下、添付の図面を参照して本発明の実施例を説明す
る。Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.
本発明に係る焼成炉の縦断面を第１図に、また、そのIV
−IV線に沿う断面を第２図に示す。Fig. 1 is a vertical cross section of a firing furnace according to the present invention, and IV
A cross section taken along line -IV is shown in FIG.
上記焼成炉11も炉床昇降式のものである。上記焼成炉11
の炉本体12は、炉壁12aおよび天井部12bがセラミックフ
ァイバー質ボードもしくは耐火断熱レンガからなり、15
0mmないし200mmの厚みを有する。上記炉本体12は、セラ
ミックの被焼成物３が収容される匣13を出し入れするた
めの開口12cを下部に有する。また、上記炉本体12は、
その開口12cに対して、図示しない油圧シリンダもしく
は電気モータにより駆動されて昇降する炉床14を備え
る。The firing furnace 11 is also of a hearth lifting type. Above firing furnace 11
In the furnace body 12 of, the furnace wall 12a and the ceiling portion 12b are made of ceramic fiber board or refractory insulation brick,
It has a thickness of 0 mm to 200 mm. The furnace main body 12 has an opening 12c at the bottom for inserting and removing the box 13 in which the ceramic object to be fired 3 is stored. Further, the furnace body 12 is
The opening 12c is provided with a hearth 14 which is driven by a hydraulic cylinder or an electric motor (not shown) to move up and down.
上記炉床14は、その中心のまわりに回転中心がほぼ90度
の角度間隔をおいてほぼ正方形の頂点の位置に位置する
４つの回転台15,…，を有する。これら回転台15,…,15
の各々は、上記炉床14を下から上に貫通するとともに、
好ましくは次のような距離関係で、上記炉床14に回転可
能に支持される。すなわち、上記匣13が一辺の長さがａ
の正方形状を有するものとすると、隣り合う回転台15の
回転中心間の距離ｄは、 に設定される。The hearth 14 has four turntables 15, ..., Around the center of which the centers of rotation are located at the apexes of a substantially square shape with angular intervals of approximately 90 degrees. These turntables 15,…, 15
Each of which penetrates the hearth 14 from bottom to top,
Preferably, they are rotatably supported by the hearth 14 in the following distance relationship. That is, the length of one side of the box 13 is a
If it has a square shape of, the distance d between the rotation centers of the adjacent rotary bases 15 is Is set to.
上記各回転台15はその下端にプーリ15aを有し、このプ
ーリ15aと上記炉床14の下に配置されたモータ16との間
にベルト17が張り渡される。そして、上記モータ16によ
り、上記正方形の対角線の両端の頂点に相当する位置に
ある２つの回転台15,15は、第２図において矢印A1また
は矢印A2で示す向きに、互いに同じ回転方向に0.1ない
し5rpmで回転駆動される。また、上記正方形の隣り合う
頂点に相当する位置にある２つの回転台15,15は、第２
図において矢印A1と矢印A2で示すように、両者が互いに
45度位相がずれた状態で逆方向に0.1ないし5rpmで回転
駆動される。Each rotary table 15 has a pulley 15a at its lower end, and a belt 17 is stretched between this pulley 15a and a motor 16 arranged below the hearth 14. Then, by the motor 16, the two rotary bases 15, 15 located at the positions corresponding to the vertices of both ends of the diagonal line of the square are rotated in the same rotational direction as the arrow A 1 or the arrow A 2 in FIG. It is driven to rotate at 0.1 to 5 rpm. Further, the two turntables 15, 15 located at the positions corresponding to the adjacent vertices of the square are
As shown by arrows A 1 and A 2 in the figure,
It is rotationally driven in the opposite direction at 0.1 to 5 rpm with the phase shifted by 45 degrees.
上記各回転台15の上には台板18が夫々載置され、この台
板18の上に匣13,…,13が多段に積み重ねられる。上記各
匣13は、アルミナもしくはムライト質の材料からなり、
一辺の長さａが100mmないし300mm角の正方形状で、高さ
がたとえば100mmの寸法を有する。そして、その最大の
積み重ね高さは、たとえば400mmである。A base plate 18 is placed on each of the turntables 15, and the boxes 13, ..., 13 are stacked on the base plate 18 in multiple stages. Each of the boxes 13 is made of an alumina or mullite material,
It has a square shape whose one side length a is 100 mm to 300 mm square, and has a height of 100 mm, for example. The maximum stacking height is, for example, 400 mm.
上記被焼成物３を加熱するために、Ｕ字状もしくはスパ
イラル状のヒータ18を８本もしくは16本、上記炉本体11
の天井部12bから上記炉本体12の炉壁12aに沿って懸垂さ
せている。また、必要により、炉本体11の天井部12bか
ら炉床14の中心に向かっても、スパイラル状のヒータ18
が設けられる。Eight or 16 U-shaped or spiral heaters 18 for heating the object 3 to be fired, the furnace body 11
Is suspended from the ceiling portion 12b of the furnace along the furnace wall 12a of the furnace body 12. In addition, if necessary, the spiral heater 18 may be moved toward the center of the hearth 14 from the ceiling portion 12b of the furnace body 11.
Is provided.
なお、被焼成物３を保護雰囲気ガス中で焼成する場合
は、炉本体12と炉床14から外方に突出する突出部14aと
を密着させるか、両者の間に耐熱性のシール部材を介装
して、炉本体12内から保護雰囲気ガスが漏れないように
している。When the object to be fired 3 is fired in a protective atmosphere gas, the furnace body 12 and the protruding portion 14a protruding outward from the hearth 14 are brought into close contact with each other, or a heat-resistant seal member is interposed between them. The protective atmosphere gas is prevented from leaking from the inside of the furnace body 12.
また、回転台15と炉床14の間隙も同様に雰囲気ガスが漏
れないようにしている。Further, the gap between the rotary table 15 and the hearth 14 is also set so that the atmospheric gas does not leak.
さらに、上記保護雰囲気ガスの炉本体12内への導入およ
び炉本体12内にて発生した排気ガスの排出は、具体的に
は図示しないが、上記炉本体12の炉壁12aもしくは天井
部12bに設けたパイプにて行う。Further, the introduction of the protective atmosphere gas into the furnace body 12 and the discharge of the exhaust gas generated in the furnace body 12 are not specifically shown in the figure, but on the furnace wall 12a or the ceiling portion 12b of the furnace body 12. Use the provided pipe.
このような構成であれば、炉本体12内にて、各回転台15
の上に積み重ねられた匣13が回転しつつ被焼成物３が焼
成されるので、この回転により、上記ヒータ18による各
匣13内の被焼成物３に対する加熱条件が各被焼成物３に
ついてほぼ一定となる。しかも、炉本体12内の雰囲気ガ
スも、多段に積み重ねられた匣13の回転により撹拌され
るので、品質のばらつきの少ない焼成品を得ることがで
きる。With such a configuration, in the furnace body 12, each rotary table 15
Since the fired material 3 is fired while the boxes 13 stacked on top of it rotate, the heating conditions for the fired objects 3 in each box 13 by the heater 18 are almost the same for each fired object 3. It will be constant. Moreover, since the atmospheric gas in the furnace body 12 is also agitated by the rotation of the box 13 stacked in multiple stages, it is possible to obtain a fired product with less variation in quality.
また、隣り合う回転台15の回転中心間の距離ｄは各回転
台15が回転することができる最小の距離となっているの
で、焼成炉11も形状が小さく、コンパクトなものとな
る。Further, since the distance d between the rotation centers of the adjacent rotary bases 15 is the minimum distance at which each rotary base 15 can rotate, the firing furnace 11 also has a small shape and is compact.
第１図は本発明に係る焼成炉の一実施例の縦断面図、 第２図は第１図の焼成炉のIV−IV線に沿う断面図、 第３図は従来の焼成炉の縦断面図、 第４図は第３図の焼成炉のII−II線に沿う断面図であ
る。 11…焼成炉,12…炉本体（12a…炉壁,12b…天井部,12c…
開口）,13…匣,14…炉床,15…回転台,16…モータ,17…
ベルト,18…台板,18…ヒータ。FIG. 1 is a vertical sectional view of an embodiment of a firing furnace according to the present invention, FIG. 2 is a sectional view taken along line IV-IV of the firing furnace of FIG. 1, and FIG. 3 is a vertical section of a conventional firing furnace. 4 and FIG. 4 are sectional views taken along line II-II of the firing furnace shown in FIG. 11 ... Baking furnace, 12 ... Furnace body (12a ... Furnace wall, 12b ... Ceiling, 12c ...
Aperture), 13… Box, 14… Heart floor, 15… Turn table, 16… Motor, 17…
Belt, 18 ... Base plate, 18 ... Heater.
Claims (2)
容してなる四角形状の匣を多段に積み重ね、これら匣を
回転させつつ上記被焼成物を焼成する焼成炉において、 上記炉床の中心のまわりに回転中心がほぼ90度の角度間
隔をおいて位置し、各々に上記匣が積み重ねられる４つ
の回転台と、対角線位置にある回転台は互いに同じ回転
方向に回転駆動する一方、隣り合う位置にある回転台は
互いに逆方向に回転駆動する回転駆動手段と、上記炉本
体の天井部から上記炉本体の内側壁に沿って懸垂し、上
記被焼成物を加熱するヒータとを備えたことを特徴とす
る焼成炉。1. A firing furnace for stacking a plurality of quadrangular boxes in which a material to be fired is placed on a bed plate on a hearth of a furnace body, and firing the material to be fired while rotating these boxes. The rotation centers are located around the center of the hearth at angular intervals of approximately 90 degrees, and the four rotation bases on which the boxes are stacked and the rotation bases in the diagonal position are driven to rotate in the same rotation direction. On the other hand, the turntables located adjacent to each other have a rotation driving means that drives them to rotate in opposite directions, and a heater that hangs from the ceiling of the furnace body along the inner side wall of the furnace body to heat the object to be fired. And a firing furnace.
し、隣り合う回転台の回転中心間の距離ｄが であることを特徴とする請求項１記載の焼成炉。2. The box has a square shape whose one side has a length a, and a distance d between rotation centers of adjacent turntables is The firing furnace according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4214389A JPH076739B2 (en) | 1989-02-22 | 1989-02-22 | Firing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4214389A JPH076739B2 (en) | 1989-02-22 | 1989-02-22 | Firing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02219979A JPH02219979A (en) | 1990-09-03 |
| JPH076739B2 true JPH076739B2 (en) | 1995-01-30 |
Family
ID=12627721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4214389A Expired - Fee Related JPH076739B2 (en) | 1989-02-22 | 1989-02-22 | Firing furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH076739B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4385213B2 (en) * | 2003-09-01 | 2009-12-16 | Ｏｐｐｃ株式会社 | Batch heat treatment equipment |
-
1989
- 1989-02-22 JP JP4214389A patent/JPH076739B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02219979A (en) | 1990-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |