JPH01174889A - Method and apparatus for sintering ceramics - Google Patents
Method and apparatus for sintering ceramicsInfo
- Publication number
- JPH01174889A JPH01174889A JP62217184A JP21718487A JPH01174889A JP H01174889 A JPH01174889 A JP H01174889A JP 62217184 A JP62217184 A JP 62217184A JP 21718487 A JP21718487 A JP 21718487A JP H01174889 A JPH01174889 A JP H01174889A
- Authority
- JP
- Japan
- Prior art keywords
- firing
- sheath
- ceramic
- furnace
- passage
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims description 18
- 238000005245 sintering Methods 0.000 title abstract 4
- 230000005484 gravity Effects 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 238000010304 firing Methods 0.000 claims description 121
- 238000000465 moulding Methods 0.000 abstract description 4
- 230000001747 exhibiting effect Effects 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 abstract 1
- 239000011120 plywood Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000238876 Acari Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 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
- 238000007599 discharging Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Tunnel Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、コンデンサあるいはフェライト等の電子部品
に用いられるセラミックス成型体を連続的に焼成するセ
ラミックス焼成方法及びその装置に係る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a ceramic firing method and apparatus for continuously firing ceramic molded bodies used for electronic components such as capacitors and ferrites.
［従来の技術］
一般に、電子部品に用いられるセラミックス成型体の焼
成には、従来より、トンネル炉と呼はれる横型の電気炉
やガス炉が用いられている。[Prior Art] Generally, horizontal electric furnaces or gas furnaces called tunnel furnaces have been used for firing ceramic molded bodies used in electronic components.
この種の焼成炉は、トンネル状の炉体が平行に配置され
、炉体の内部は予熱ゾーン、焼成ゾーン及び冷却ゾーン
として、各々所定の温度分布が形成されている。この様
な構成を有するトンネル炉でセラミ・ンクス成型体を焼
成する場合、焼成するセラミック成型体を箱状の焼成庫
に縦−詰め、もしくは横詰めにする。この焼成庫を水平
方向に直線上に配列された搬送用の合板上に積載し、ブ
ツシャにより、先ず、炉体の予熱ゾーンにブツシュする
。この予熱ゾーンにてセラミックス成型体中のバインダ
（成形助剤）を燃焼（脱パインダニ程）させた後、前記
台板を炉体の焼成ゾーンにブツシュしてセラミックス成
型体を１２００℃〜１３５０℃の温度で２０時間ないし
３０時間煩焼成る。この焼成が完了すると、セラミック
ス成型体は炉体の冷却ゾーンにブツシュされ、冷却され
た後、炉体から引き出される。This type of firing furnace has a tunnel-shaped furnace body arranged in parallel, and the inside of the furnace body has a preheating zone, a firing zone, and a cooling zone, each of which has a predetermined temperature distribution. When firing ceramic molded bodies in a tunnel furnace having such a configuration, the ceramic molded bodies to be fired are packed vertically or horizontally in a box-shaped firing chamber. This firing chamber is loaded on a plywood board for transportation arranged in a straight line in the horizontal direction, and is first pushed into the preheating zone of the furnace body using a pusher. After burning the binder (molding aid) in the ceramic molded body in this preheating zone (depine removal process), the base plate is pushed into the firing zone of the furnace body and the ceramic molded body is heated to 1200°C to 1350°C. It is baked for 20 to 30 hours at a certain temperature. When this firing is completed, the ceramic molded body is bushed into the cooling zone of the furnace body, cooled, and then pulled out from the furnace body.
［発明が解決しようとする問題点コ
ところで、前記のような従来のセラミックス焼成装置で
は、焼成庫の眼送に用いられる合板の熱容量が大きく、
焼成の過程で該合板に直接接触する焼成庫と、該合板に
直接接触しない焼成庫とではその焼成温度のパターンに
大きな差を生じる。すなわち、この様な差の生じた部分
では、炉内の台板の進行方向に対して垂直な断面上での
温度分布が均一ではなくなる。このように、所定の焼成
温度パターンに対して実際の焼成温度に差（バラツキ）
を生じた状態で焼成が行われた場合、セラミックス成型
体からバインダ成分が分解、離脱する過程で急激な燃焼
が起こり、その際にセラミックス成型体にクラックが発
生する。[Problems to be Solved by the Invention] However, in the conventional ceramic firing apparatus as described above, the heat capacity of the plywood used for feeding the firing chamber is large;
There is a large difference in the firing temperature pattern between a firing chamber that comes into direct contact with the plywood during the firing process and a firing chamber that does not come into direct contact with the plywood. That is, in a portion where such a difference occurs, the temperature distribution on a cross section perpendicular to the direction of movement of the base plate in the furnace is no longer uniform. In this way, there is a difference (variation) in the actual firing temperature for a predetermined firing temperature pattern.
If firing is carried out in a state where .
また、前記の様に熱容量の大きな合板を焼成庫と共に加
熱するため、焼成炉の熱効率が低下し、もってセラミッ
クスの製造コストの上昇を招く。Furthermore, as described above, since plywood having a large heat capacity is heated together with the firing chamber, the thermal efficiency of the firing furnace is reduced, leading to an increase in the manufacturing cost of ceramics.
本発明の目的は、前記の従来技術におけるセラミックス
焼成における問題点に鑑みてなされたものであり、確実
に所定の焼成温度パターンで焼成可能であり、もってク
ラック発生が少なく、かつ熱効率にも優れたセラミック
ス焼成方法とその装置を提供することにある。The object of the present invention was made in view of the problems in ceramic firing in the prior art, and it is possible to reliably fire at a predetermined firing temperature pattern, thereby reducing the occurrence of cracks and having excellent thermal efficiency. An object of the present invention is to provide a ceramic firing method and apparatus.
［問題を解決するための手段］
前記本発明の目的は、第１の発明によれば、焼成するセ
ラミックス成型体を鞘体の内部に収容し、所定の温度分
布を有する焼成炉の内部をその一端開口から他端開口に
向かって前記鞘体を通過させ、この通過の過程で前記セ
ラミックス成型体を連続的に焼成するセラミックス焼成
方法において、前記セラミックス成型体を収容した前記
鞘体を積層し、前記積層した鞘体を重力方向に移動させ
て前記焼成炉内部を順次通過させるセラミックス焼成方
法により達成される。[Means for Solving the Problem] According to the first invention, the object of the present invention is to house a ceramic molded body to be fired inside a sheath body, and to control the inside of a firing furnace having a predetermined temperature distribution. A ceramic firing method in which the sheath body is passed from one end opening toward the other end opening, and the ceramic molded body is continuously fired during this passing process, in which the sheath bodies containing the ceramic molded body are stacked, This is achieved by a ceramic firing method in which the laminated sheath bodies are moved in the direction of gravity and sequentially passed through the inside of the firing furnace.
また、第２の発明によれば、前記本発明の目的は、所定
の温度分布を有する焼成炉と、焼成するセラミ・ンクス
成型体を内部に収容し、前記焼成炉内を通過する鞘体と
、前記鞘体を前記焼成炉内部で移動する手段とを有し、
前記鞘体が前記焼成炉内部を通過する過程で前記セラミ
・ンクス成型体を連続的に焼成するセラミ・ンクス焼成
装置ζこおいて、前記焼成炉の鞘体が通過する内部通路
を重力方向に沿って形成すると共に、該通路の上部及び
下部とに各々開口を備え、前記内部通路内に積層された
鞘体を重力方向に移動させる鞘体移動手段を備えるセラ
ミックス焼成装置により達成される。According to a second aspect of the present invention, the object of the present invention is to provide a firing furnace having a predetermined temperature distribution, a sheath body that houses a ceramic molded body to be fired therein and that passes through the inside of the firing furnace. , means for moving the sheath inside the firing furnace,
In the ceramic nx firing device ζ, which continuously fires the ceramic nx molded body while the sheath body passes through the inside of the firing furnace, the internal passage through which the sheath body of the firing furnace passes is oriented in the direction of gravity. This is achieved by a ceramic firing apparatus that is formed along the inner passage, has openings at the upper and lower parts of the passage, and is provided with a sheath moving means for moving the sheath bodies laminated within the internal passage in the direction of gravity.
［作 用］
前記第１及び第２の発明によれば、セラミックス成型体
を収納した鞘体は、焼成炉内に縦方向に形成された通路
内で積層されて重力方向に順次移動する。従って、前記
従来技術のように搬送のために合板を用いることなく、
鞘体の焼成炉内部での移動が可能となりる。このため、
セラミックス成型体がこれらによる温度の変動を伴うこ
となく、所定の温度パターンに従って焼成され、バイン
ダー成分の分離、離脱過程での急激な燃焼によるクラッ
クの発生を避は得、かつ熱効率にも優れたセラミックス
の焼成方法及びその装置を得ることが可能となる。[Function] According to the first and second inventions, the sheath bodies housing the ceramic molded bodies are stacked in a passage formed in the vertical direction in the firing furnace and sequentially move in the direction of gravity. Therefore, unlike the prior art, plywood is not used for transportation, and
The sheath body can be moved inside the firing furnace. For this reason,
The ceramic molded body is fired according to a predetermined temperature pattern without any temperature fluctuations caused by these, and the generation of cracks due to rapid combustion during separation of the binder component and release process can be avoided, and the ceramic is also excellent in thermal efficiency. It becomes possible to obtain a firing method and apparatus for the same.
［実 施 例］
以下、添付の図面を参照しながら本発明の実施例につい
て説明する。[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.
第１図（ａ）において、図示されない基台上には焼成炉
体１０が載置され、その内部には内部横断面円形の焼成
通路１１が図中上下に縦方向に、すなわち矢印Ｇにより
示す重力方向に沿って形成され、その上端部及び下端部
には各。In FIG. 1(a), a firing furnace body 10 is placed on a base (not shown), and inside thereof a firing passage 11 having a circular internal cross section is vertically arranged vertically in the figure, that is, indicated by an arrow G. It is formed along the direction of gravity, and each has its upper and lower ends.
々開口１２．１３が形成されている。そして、この焼成
炉体１０は、充分な断熱効果を得るため、例えは肉厚が
１５０ｍｍ〜２００ｍｍのセラミックスポード等の高断
熱材料をその壁材として使用し、その内部には焼成通路
１１を取り囲むようにヒータ１４が配置されている。こ
のヒータ１４はセラミックス成型体の熱処理のパターン
に対応し、その焼成通路１１がたとえは第１図（ｂ）に
示すような温度分布を呈するように加熱を行っている。Each opening 12,13 is formed. In order to obtain a sufficient heat insulation effect, this firing furnace body 10 uses a highly insulating material such as ceramic spord with a wall thickness of 150 mm to 200 mm as its wall material, and the inside thereof surrounds the firing passage 11. The heater 14 is arranged as follows. This heater 14 corresponds to the heat treatment pattern of the ceramic molded body, and performs heating so that the firing passage 11 exhibits a temperature distribution as shown in FIG. 1(b).
図にも示すように、焼成炉１０の上端部開口１２は、重
力方向に形成された焼成通路１１の人口となっており、
その近傍にはブツシャ１５が設けられている。このブツ
シャ１５は焼成用鞘１６を図中矢印で示す方向に押し出
し、焼成通路１１内に積層された鞘１６の上に自動的に
積み重ねる。As shown in the figure, the upper end opening 12 of the firing furnace 10 forms a firing passage 11 formed in the direction of gravity.
A button 15 is provided in the vicinity thereof. This busher 15 pushes out the firing sheath 16 in the direction shown by the arrow in the figure and automatically stacks it on top of the sheath 16 stacked in the firing passage 11.
焼成炉１０の上端部開口１３は焼成通路１１の出力とな
っており、その近傍には、前記焼成通路１１内に積層さ
れた複数の鞘１６を重力方向に支える靴支持体１７、ス
トッパ１８、第２のブツシャ１９、そして鞘堂台２０が
設けられている。これら靴支持体１７、ストッパ１日、
第２のブツシャ１９は、その動作の詳細は後に説明する
が、図中に矢印で示す方向に動き、焼成通路１１内に積
層した鞘１６の最下層の鞘を順次鞘受台２０に移動させ
る。これによって、焼成用鞘１６を所定の温度分布を呈
する焼成通路１１内を順次移動、通過させる。The upper end opening 13 of the firing furnace 10 serves as the output of the firing passage 11, and in the vicinity thereof there are a shoe support 17, a stopper 18, which supports a plurality of sheaths 16 stacked in the firing passage 11 in the direction of gravity. A second bushing 19 and a scabbard stand 20 are provided. These shoe supports 17, stoppers 1 day,
The second butcher 19 moves in the direction indicated by the arrow in the figure, and sequentially moves the lowermost sheaths of the sheaths 16 stacked in the firing passage 11 to the sheath holder 20, although the details of its operation will be explained later. . As a result, the firing sheath 16 is sequentially moved and passed through the firing passage 11 exhibiting a predetermined temperature distribution.
前記焼成炉体１０の内部は、第１図（ｂ）に示すように
、予熱ゾーン、焼成ゾーンおよび冷却ゾーンとして、各
々所定の温度分布が形成されている。一方、前記焼成用
鞘１６の内部には、焼成処理すべきセラミックス成型体
２１が縦詰め、もしくは横詰めに収納される。このセラ
ミックス成型体を収納した鞘１６は、前記支持体１７、
ストッパ１日、ブツシャ１９により構成される鞘取出し
機構の働きにより、先ず、焼成通路上端間口１２から焼
成炉体１０の予熱ゾーン内に入り、セラミックス成型体
２１中のバインダ（成形助材）を焼成させる（脱パイン
ダニ程）。その後、前記鞘１６は焼成ゾーンに移動され
、セラミックス成型体２１を１２００℃〜１３５０℃の
温度下で２０時間ないし３０時間焼成する。この焼成工
程が完了すると、前記鞘１６は炉体１０の冷却ゾーンに
移動されて、セラミックス成型体を冷却した後、焼成通
路１１の下端開口１３から取り出される。As shown in FIG. 1(b), the interior of the firing furnace body 10 has predetermined temperature distributions as a preheating zone, a firing zone, and a cooling zone. On the other hand, inside the firing sheath 16, the ceramic molded bodies 21 to be fired are stored vertically or horizontally. The sheath 16 that accommodates this ceramic molded body includes the support body 17,
On the first day of the stopper, by the action of the sheath removal mechanism constituted by the bushing 19, it first enters the preheating zone of the firing furnace body 10 from the upper end opening 12 of the firing passage, and fires the binder (molding aid) in the ceramic molded body 21. (to the extent that it removes pine mites). Thereafter, the sheath 16 is moved to a firing zone, and the ceramic molded body 21 is fired at a temperature of 1200° C. to 1350° C. for 20 to 30 hours. When this firing process is completed, the sheath 16 is moved to the cooling zone of the furnace body 10 to cool the ceramic molded body, and then taken out from the lower end opening 13 of the firing passage 11.
前記焼成用鞘１６は、第２図に示すように、略円筒状の
形状を有し、その上部は開放されている。すなわち、円
形底部１６ａの外周縁には直立した側壁部１６ｂが形成
されており、その外径は前記焼成通路１１の内径よりわ
ずかに小さくなっている。この焼成用鞘１６は、セラミ
ックス成型体の本焼成のような高温処理用のものでは、
ムライトもしくはアルミナ質、さらには炭化硅素質の材
料から成るものを使用し、セラミックス成型体への銀焼
付等の低温処理用のものでは、ステンレスもしくはイン
コネル等の材料で形成したものを用いる。As shown in FIG. 2, the firing sheath 16 has a substantially cylindrical shape and is open at the top. That is, an upright side wall portion 16b is formed on the outer peripheral edge of the circular bottom portion 16a, and the outer diameter of the side wall portion 16b is slightly smaller than the inner diameter of the firing passage 11. This firing sheath 16 is not for high-temperature processing such as main firing of a ceramic molded body.
Those made of mullite, alumina, or even silicon carbide are used, and those made of stainless steel or Inconel are used for low-temperature processing such as silver baking on ceramic molded bodies.
また、第２図には、前記鞘１６の重力による移動を一時
的に阻止するために用いるストッパ１日が示されている
。このストッパ１８は、図にも示されるように、前記鞘
１６の側壁部１６ｂの外周形状に合わせ、略半円状の組
接触部１８ａとロッド部１８ｂとから構成されている。Also shown in FIG. 2 is a stopper used to temporarily prevent movement of the sheath 16 due to gravity. As shown in the figure, this stopper 18 is composed of a substantially semicircular set contact portion 18a and a rod portion 18b, matching the outer peripheral shape of the side wall portion 16b of the sheath 16.
次に、前記支持体１７、ストッパ１８、ブツシャ１９か
ら構成される鞘取出し機構の動作を以下に説明する。第
３図（ａ）は、支持体１７、ストッパ１８、ブツシャ１
９が初期位置にある状態を示している。支持体１７上に
は複数の鞘１６が積層され、最下層の鞘１６だけが焼成
炉１０の焼成用通路１１の下端間口１３から出ている。Next, the operation of the sheath removal mechanism composed of the support body 17, stopper 18, and button 19 will be explained below. FIG. 3(a) shows the support 17, the stopper 18, and the button 1.
9 is at the initial position. A plurality of sheaths 16 are stacked on the support 17, and only the lowest sheath 16 comes out from the lower end opening 13 of the firing passage 11 of the firing furnace 10.
この状態において、図中に矢印で示すように、まず支持
体１７を下方に移動する。その結果、第３図（ｂ）に示
すように、積層された鞘１６のうち最下層から第２段目
の鞘１６も前記下端開口１３から引き出され、これによ
って、前記積層された鞘１６が焼成通路１１の内部を一
段下がることとなる。この時、ストッパ１日が、同図中
矢印で示すように押し出され、第３図（Ｃ）に示すよう
に、最下層から２段目の鞘１６を両側から挟んで固定す
る。その後、支持体１７は下方に移動し、第３図（ｄ）
に示すように、最下層の鞘１６のみを鞘受台２０と同一
の高さになるまで降下させ、第３図（ｅ）に示すように
、ブツシャ１９を押し出して前記最下層の鞘１６を受台
２０上に移動させる。最後に、第３図（ｆ）にも示すよ
うに、前記ブツシャ１９を戻し、さらに支持体１７を元
の位置まで上昇させ、ストッパー１８を元の位置まで戻
して動作を完了し、第３図（ａ）の状態に戻る。In this state, first, the support body 17 is moved downward as shown by the arrow in the figure. As a result, as shown in FIG. 3(b), the second tier of sheaths 16 from the bottom among the stacked sheaths 16 are also pulled out from the lower end opening 13, whereby the stacked sheaths 16 The inside of the firing passage 11 is moved down one step. At this time, the stopper 1 is pushed out as shown by the arrow in the same figure, and as shown in FIG. 3(C), the second sheath 16 from the lowest layer is sandwiched and fixed from both sides. Thereafter, the support body 17 moves downward, as shown in FIG. 3(d).
As shown in FIG. 3, only the lowermost sheath 16 is lowered to the same height as the sheath holder 20, and as shown in FIG. 3(e), the bushing 19 is pushed out and the lowermost sheath 16 Move it onto the pedestal 20. Finally, as shown in FIG. 3(f), the button 19 is returned, the support 17 is further raised to its original position, and the stopper 18 is returned to its original position to complete the operation. Return to state (a).
以上説明したセラミックス焼成装置によれは、セラミッ
クス成型体を収容した円筒状の鞘１６は、焼成炉内に縦
方向に形成された通路内に積層されて重力方向に順次移
動する。このため、鞘１６を前記積層された鞘１６の上
に単に積み重ねれはよく、従来のトンネル炉の如く炉の
内部を移動するために用いる合板を用いる必要がない。In the ceramic firing apparatus described above, the cylindrical sheaths 16 containing the ceramic molded bodies are stacked in a passage formed vertically in the firing furnace and sequentially move in the direction of gravity. Therefore, the sheath 16 can simply be stacked on top of the stacked sheaths 16, and there is no need to use plywood to move inside the furnace as in conventional tunnel furnaces.
従って、合板による熱的影響を受けることなく、前記鞘
１６の内部に収容されたセ、ラミ・ンクス成型体を所定
の温度分布に従って焼成することが可能となる。しかも
、合板の加熱に消費される熱量も不要であるため、熱効
率も向上する。また、上述の如く、新たに焼成炉中に導
入する鞘も、前記積層された組上に積み重ねるだけでよ
く、作業性をも著しく向上することができる。加えて、
焼成炉体中の焼成通路を重力方向に沿って形成したこと
により、炉の焼成ゾーンの余熱は焼成通路を上昇して予
熱ゾーンに達し、これにより予熱ゾーンの温度を効率的
高めることが出来、この点でも熱効率を大幅に向上する
ことができる。Therefore, it is possible to fire the laminated molded body housed inside the sheath 16 according to a predetermined temperature distribution without being thermally affected by the plywood. Moreover, since the amount of heat consumed to heat the plywood is not necessary, thermal efficiency is also improved. Further, as described above, the sheaths newly introduced into the firing furnace need only be stacked on the stacked assembly, and work efficiency can also be significantly improved. In addition,
By forming the firing passage in the firing furnace body along the direction of gravity, residual heat in the firing zone of the furnace rises through the firing passage and reaches the preheating zone, thereby making it possible to efficiently increase the temperature of the preheating zone. In this respect as well, thermal efficiency can be significantly improved.
前記の実施例では、焼成炉体中の通路の断面を円形とし
、かつ焼成用鞘の外形を円筒状にすることにより、鞘内
への熱伝達を均一にすると同時に熱効率を最も良好にす
ることができる。In the embodiment described above, the cross section of the passage in the firing furnace body is circular, and the outer shape of the firing sheath is made cylindrical, thereby ensuring uniform heat transfer into the inside of the sheath and at the same time achieving the best thermal efficiency. Can be done.
しかしながら、本発明は前記の実施例に限定されず、例
えば、前記焼成炉体中の通路断面を四角形にしても同様
の効果を達成し得ることは明かである。However, the present invention is not limited to the above-described embodiment, and it is clear that the same effect can be achieved even if the cross section of the passage in the firing furnace body is made square, for example.
また、焼成用鞘に１いても、前記の実施例のみに限らず
、以下に説明するものを使用しても同様の効果、あるい
はそれ以上の効果を達成し得る。Further, even if the firing sheath is used, the same effects or even better effects can be achieved by using not only the above-mentioned embodiments but also those described below.
第４図に示す焼成用鞘１６０は、第２図に示した焼成用
鞘１６を改良したものである。この鞘１６０では、側壁
部１６０ａの四方に切欠きを設け、これにより鞘１６０
内部への熱伝達を向上させ、熱効率をさらに向上し得る
ものである。また、その底部１６０ｂには焼成されるセ
ラミックス成型体の寸法よりも小さな複数個の孔１６０
ｃを形成し、セラミックス成型体内のバインダ等の燃焼
により発生するガスを排出すると共に、焼成ゾーンの余
部を予熱ゾーンへ上昇して、炉の温度を効率的に上昇さ
せることができるという優れた効果を発揮させている。The firing sheath 160 shown in FIG. 4 is an improved version of the firing sheath 16 shown in FIG. In this sheath 160, notches are provided on all sides of the side wall portion 160a, so that the sheath 160
This improves heat transfer to the inside and further improves thermal efficiency. Further, the bottom portion 160b has a plurality of holes 160 smaller than the size of the ceramic molded body to be fired.
This has the excellent effect of being able to efficiently raise the temperature of the furnace by discharging the gas generated by the combustion of the binder, etc. inside the ceramic molded body, and by raising the remainder of the firing zone to the preheating zone. is demonstrated.
第５図（ａ）及び同図（ｂ）には、略箱形の外形を有す
る焼成用鞘１７０．１７１が、また第６図（ａ）及び同
図（ｂ）には、その底面が六角形の焼成用鞘１７２．１
７３が示されている。特に、第５図（ａ）及び同図（ｂ
）に示す鞘１７０．１７１は、焼成炉の通路断面を四角
形にした場合に有効であり、また第６図（ａ）及び同図
（ｂ）に示すものは、六角形横断面の通路はもちろん、
円形横断面の通路を有する焼成炉においても有効に使用
し得る。これら鞘の底部に、必要に応じて前記のガス排
出用の孔を形成することも可能であることは言うまでも
ない。5(a) and 5(b) show a firing sheath 170, 171 having a generally box-shaped outer shape, and FIG. Square firing sheath 172.1
73 is shown. In particular, FIGS. 5(a) and 5(b)
The sheaths 170 and 171 shown in ) are effective when the cross-section of the passage in the firing furnace is square, and the sheaths shown in Figs. ,
It can also be used effectively in firing furnaces with passages of circular cross section. It goes without saying that holes for the aforementioned gas discharge can be formed in the bottoms of these sheaths, if necessary.
第７図及び第８図には、前記スト・ンバーの変形例が示
されている。第７図に示すストッパー１８１は、半円状
の組接触部１８１ａの下端部に鍔部１８１ｂを形成した
ものであり、円筒状の焼成用鞘のスト・ンパーとして用
いられている。FIGS. 7 and 8 show a modification of the stringer. A stopper 181 shown in FIG. 7 has a flange portion 181b formed at the lower end of a semicircular group contact portion 181a, and is used as a stopper for a cylindrical firing sheath.
また、第８図に示すストッパー１８２は、半円状に代え
て直線状の組接触部１８２ａを有しており、第５図（ａ
）及び（ｂ）等に示す角型の焼成用鞘のストッパーとし
て用いられる。この直線状接触部１８２ａの下端部には
、前記変形例と同様、鍔部１８２ｂが設けられている。Furthermore, the stopper 182 shown in FIG.
) and (b) are used as stoppers for square firing sheaths. A collar portion 182b is provided at the lower end of this linear contact portion 182a, as in the modification described above.
これらの変形例になるストッパー１８１．１８２によれ
ば、前記鍔部１８１ｂ、１Ｂ２ｂの働きにより、第２図
に示すストッパーよりも、確実に積層された焼成用鞘を
所定位置に停止、保持できることは明らかであろう。ま
た、前記鍔部１８１ｂ、１Ｂ２ｂは、図にも示すように
、そ′の先端が鋭く形成されおり、ストッパー１８１．
１８２を横方向から押し付ける際、前記鍔部１Ｂｌｂ、
１８２ｂが積層された鞘の間に挿入され易いようになっ
ている。According to these modified stoppers 181 and 182, the stacked firing sheaths can be stopped and held in a predetermined position more reliably than the stopper shown in FIG. 2 due to the function of the flanges 181b and 1B2b. It should be obvious. Further, as shown in the figure, the flanges 181b and 1B2b have sharp tips, and the stoppers 181.
When pressing 182 from the side, the flange 1Blb,
182b can be easily inserted between the stacked sheaths.
次に、第１図（ａ）に示す焼成装置により焼成したセラ
ミックス成型体と、従来のトンネル炉により焼成したセ
ラミックス成型体を比較例とし、これらの比較結果を示
す。Next, a ceramic molded body fired by the firing apparatus shown in FIG. 1(a) and a ceramic molded body fired by a conventional tunnel furnace are used as comparative examples, and the results of their comparison are shown.
まず、チタン酸バリウム系のコンデンサ材料にバインダ
を加え、これをドクターブレード法により厚さ０．３ｍ
ｍのグリーンシートに成形する。First, a binder is added to barium titanate-based capacitor material, and this is 0.3 m thick using the doctor blade method.
Form into a green sheet of m.
このシートから１２φの円板状のセラミックス成型体を
得た。このセラミックス成型体を焼成用鞘１６内に１０
枚重ねて収納し、一方は第１図（ａ）に示す焼成装置に
より、他方は前記鞘を合板上に２段に重ねてトンネル炉
により、何れも同一の温度分布で同一時間焼成した。そ
の後、得られた焼成体セラミックスから任意に１００枚
づつ抜き取り、これらを目視によりクラックの発生率を
調べた。この結果を表１に示す。また、同時に測定した
熱効率についても、その測定結果が衷ｌに示されている
。A 12φ disc-shaped ceramic molded body was obtained from this sheet. This ceramic molded body is placed in the firing sheath 16 for 10 minutes.
The sheaths were stacked and stored, and one of the sheaths was fired in the firing apparatus shown in FIG. 1(a), and the other was fired in a tunnel furnace with the sheaths stacked in two layers on plywood at the same temperature distribution for the same time. Thereafter, 100 pieces were arbitrarily taken out from the obtained fired ceramic body, and the occurrence rate of cracks was visually examined. The results are shown in Table 1. The results of the thermal efficiency measurements, which were also measured at the same time, are shown on the back.
表１
前記表１に示す比較結果からも明らかなように、本発明
になる焼成装置により焼成されたセラミックス成型体は
、クラックの発生率が大幅に改善され、さらに熱効率も
大幅に向上されることが明かとなっている。Table 1 As is clear from the comparison results shown in Table 1 above, the ceramic molded body fired by the firing apparatus of the present invention has a significantly improved crack occurrence rate and also has a significantly improved thermal efficiency. It is clear that
［発明の効果］
上述からも明らかなように、前記の本発明によれは、焼
成されたセラミックス成型体のクラック発生率を大幅に
低減することが可能で、熱効率にも優れ、さらには作業
性にも優れた実用的なセラミックス焼成方法及びその装
置を提供することができる。[Effects of the Invention] As is clear from the above, according to the present invention, it is possible to significantly reduce the crack occurrence rate of fired ceramic molded bodies, and it also has excellent thermal efficiency, and further improves workability. It is also possible to provide an excellent and practical ceramic firing method and apparatus.
第１図（ａ）は本発明になるセラミックス焼成装置の概
略を示す説明図、第１図は（ｂ）は第１図（ａ）の焼成
炉の温度分布を示す図、第２図は第１図（ａ）に示す焼
成用鞘及びスト・ンパーの詳細構造を示す傾祖国、第３
図（ａ）ないしくｅ）は第１図の焼成装置の動作を示す
ための説明図、第４図、第５図（ａ）、（ｂ）、及び第
６図（ａ）、（ｂ）は焼成用鞘の他の変形例を示す図、
第７図及び第８図はストッパーの他の変形例を示す図で
ある。FIG. 1(a) is an explanatory diagram showing the outline of the ceramic firing apparatus according to the present invention, FIG. 1(b) is a diagram showing the temperature distribution of the firing furnace of FIG. 1(a), and FIG. 1 (a) showing the detailed structure of the firing sheath and striker, No. 3
Figures (a) to e) are explanatory diagrams showing the operation of the firing apparatus in Figure 1, Figures 4, 5 (a) and (b), and Figures 6 (a) and (b). is a diagram showing another modification of the firing sheath,
FIGS. 7 and 8 are diagrams showing other modifications of the stopper.
Claims (7)
、所定の温度分布を有する焼成炉の内部をその一端開口
から他端開口に向かって前記鞘体を通過させ、この通過
の過程で前記セラミックス成型体を連続的に焼成するセ
ラミックス焼成方法において、前記セラミックス成型体
を収容した前記鞘体を積層し、前記積層した鞘体を重力
方向に移動させて焼成炉内部を順次通過させることを特
徴とするセラミックス焼成方法。(1) A ceramic molded body to be fired is housed in a sheath body, and the sheath body is passed through a firing furnace having a predetermined temperature distribution from an opening at one end toward an opening at the other end, and in the process of passing through the furnace. In the ceramic firing method of continuously firing the ceramic molded body, the sheath bodies containing the ceramic molded bodies are stacked, and the laminated sheath bodies are moved in the direction of gravity to sequentially pass through the inside of a firing furnace. Characteristic ceramic firing method.
おいて、前記積層した鞘体の最下層の鞘体を順次積層列
から外して前記鞘体を前記焼成炉内部に順次移動、通過
させることを特徴とするセラミックス焼成方法。(2) In the method for firing ceramics according to claim 1, the lowermost layer of the laminated sheaths is sequentially removed from the stacked row, and the sheaths are sequentially moved and passed inside the firing furnace. Characteristic ceramic firing method.
おいて、前記焼成炉の内部横断面は円形であり、かつ前
記鞘体は円筒形であることを特徴とするセラミックス焼
成方法。(3) The method for firing ceramics according to claim 1, wherein the internal cross section of the firing furnace is circular, and the sheath body is cylindrical.
ミックス成型体を内部に収容し、前記焼成炉内を通過す
る鞘体と、前記鞘体を前記焼成炉内部で移動する手段と
を有し、前記鞘体が前記焼成炉内部を通過する過程で前
記セラミックス成型体を連続的に焼成するセラミックス
焼成装置において、前記焼成炉の鞘体が通過する内部通
路を重力方向に沿って形成すると共に、該通路の上部及
び下部とに各々開口を備え、前記内部通路内に積層され
た鞘体を重力方向に移動させる鞘体移動手段を備えるこ
とを特徴とするセラミックス焼成装置。(4) A firing furnace having a predetermined temperature distribution, a sheath body that houses a ceramic molded body to be fired therein and passes through the inside of the firing furnace, and means for moving the sheath body inside the firing furnace. In a ceramic firing apparatus that continuously fires the ceramic molded body while the sheath body passes inside the firing furnace, an internal passage through which the sheath body of the firing furnace passes is formed along the direction of gravity; . A ceramic firing apparatus, comprising openings at the upper and lower parts of the passage, and a sheath moving means for moving the sheath bodies stacked in the internal passage in the direction of gravity.
おいて、前記鞘体移動手段は前記焼成炉の下部開口に設
けられたことを特徴とするセラミックス焼成装置。(5) A ceramic firing apparatus according to claim 4, wherein the sheath moving means is provided at a lower opening of the firing furnace.
おいて、前記鞘体移動手段は前記積層された鞘体の最下
層の鞘体を順次積層列から外す機構を備えたことを特徴
とするセラミックス焼成装置。(6) The ceramic firing apparatus according to claim 5, wherein the sheath moving means includes a mechanism for sequentially removing the lowermost sheath of the laminated sheath from the stacked row. Baking equipment.
部通路の横断面は円形であり、かつ上部鞘体は円筒形で
あることを特徴とするセラミックス焼成装置。(7) The ceramic firing apparatus according to claim 4, wherein the internal passage of the firing furnace has a circular cross section, and the upper sheath body has a cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62217184A JPH01174889A (en) | 1987-08-31 | 1987-08-31 | Method and apparatus for sintering ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62217184A JPH01174889A (en) | 1987-08-31 | 1987-08-31 | Method and apparatus for sintering ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01174889A true JPH01174889A (en) | 1989-07-11 |
Family
ID=16700179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62217184A Pending JPH01174889A (en) | 1987-08-31 | 1987-08-31 | Method and apparatus for sintering ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01174889A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010071625A (en) * | 2008-09-22 | 2010-04-02 | Kida Seiko Kk | Baking device |
| WO2014103929A1 (en) * | 2012-12-28 | 2014-07-03 | 株式会社村田製作所 | Heat treatment apparatus |
-
1987
- 1987-08-31 JP JP62217184A patent/JPH01174889A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010071625A (en) * | 2008-09-22 | 2010-04-02 | Kida Seiko Kk | Baking device |
| WO2014103929A1 (en) * | 2012-12-28 | 2014-07-03 | 株式会社村田製作所 | Heat treatment apparatus |
| JP6024763B2 (en) * | 2012-12-28 | 2016-11-16 | 株式会社村田製作所 | Heat treatment equipment |
| JPWO2014103929A1 (en) * | 2012-12-28 | 2017-01-12 | 株式会社村田製作所 | Heat treatment equipment |
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