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JP3557945B2 - Method for firing hollow ceramic building materials - Google Patents

Method for firing hollow ceramic building materials Download PDF

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Publication number
JP3557945B2
JP3557945B2 JP11516999A JP11516999A JP3557945B2 JP 3557945 B2 JP3557945 B2 JP 3557945B2 JP 11516999 A JP11516999 A JP 11516999A JP 11516999 A JP11516999 A JP 11516999A JP 3557945 B2 JP3557945 B2 JP 3557945B2
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Japan
Prior art keywords
fired
rod
firing
hollow ceramic
ceramic building
Prior art date
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Expired - Fee Related
Application number
JP11516999A
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Japanese (ja)
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JP2000302529A (en
Inventor
泰男 後藤
茂雄 杉江
誠基 元広
恭司 飯村
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Inax Corp
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Inax Corp
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Publication of JP2000302529A publication Critical patent/JP2000302529A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0003Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof containing continuous channels, e.g. of the "dead-end" type or obtained by pushing bars in the green ceramic product

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は中空セラミックス建材の焼成方法に係り、特に6面のすべてを美麗な焼き上り面とすることができる中空セラミックス建材の焼成方法に関する。
【0002】
【従来の技術】
タイル等の板状体を焼成する場合、板状成形体をローラーハースキルンを通して焼成したり、或いは該成形体を耐火物製の焼成用の敷板の上に載せて焼成している。中空の土管を焼成する場合、この土管形状の成形体を自立させて焼成している。
【0003】
【発明が解決しようとする課題】
6面のすべてを美麗な焼き上り面とする必要がある場合、被焼成物をそのままローラーハースキルンに通したり、敷板の上に並べて焼成する場合、ローラーハースキルン内のローラーや該敷板と接触する面に傷等の欠点ないし欠陥が生じることがあり、不良品が多数生じ易い。
【0004】
本発明は、6面のすべてが美麗な焼き上り面となっているセラミックスを高歩留りにて焼成することができる中空セラミックス建材の焼成方法を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明の中空セラミックス建材の焼成方法は、貫通孔を有した被焼成物を焼成する方法において、該貫通孔に耐火物の棒状体を通し、この棒状体によって該被焼成物を吊して焼成する方法であって、該貫通孔の天井面は平面であり、該平面を棒状体によって支持することを特徴とするものである。
【0006】
かかる本発明の焼成方法にあっては、被焼成物を棒状体で吊して焼成するので、被焼成物の外面がローラーや敷板等と全く接することがなく、6面すべてが美麗な焼き上り面となった中空セラミックス建材を高歩留りにて製造することができる。
【0007】
この被焼成物が、一方向に長い板状であり、その長手方向に複数の貫通孔が貫通しており、且つ各貫通孔は板状被焼成物の幅方向に配列されているものである場合、少なくとも幅方向両端側の貫通孔に前記棒状体を通すことが好ましい。このように、複数の貫通孔に棒状体を通して被焼成物を吊すことにより、棒状体の姿勢が安定すると共に、被焼成物の「へたり」と称されるたわみ変形が防止される。この場合、貫通孔のすべてに棒状体を通すようにしても良く、このようにすれば被焼成物のたわみ変形が確実に防止される。
【0008】
この棒状体は、円柱形のものなど長手方向と垂直な断面において、少なくとも上面が円弧形であることが好ましい。かかる円弧形断面形状の棒状体は、貫通孔の内面(孔の天井面)との接触面積が小さいので、焼成途中において被焼成物と棒状体との熱膨張差に起因して被焼成物に加えられる応力が小さく、被焼成物に亀裂が生じることが防止される。また、接触面積が小さいため、被焼成物と棒状体との融着も防止される。
【0009】
【発明の実施の形態】
図1は実施の形態に係る中空セラミックス建材の焼成方法を示す斜視図である。
【0010】
被焼成物1は長方形板状であり、その長手方向に複数個(この実施の形態では3個)の貫通孔2が貫通している。各貫通孔2に耐火物製の円柱状の棒状体3が挿通され、この棒状体3の両端が貫通孔2から突出し、それぞれ支持台4に載荷されている。この支持台4は上面に凹溝を有しており、棒状体3の端部が該凹溝に係合し、棒状体3が転動しないようになっている。この支持台4は台車5上に載置又は固定設置されている。この台車をトンネル窯(図示略)に通して被焼成物1を焼成する。図示の通り、被焼成物1は棒状体3によって吊された状態にて焼成されるので、被焼成物1の6面のすべてが台車5に接することがなく、6面すべてが美麗な焼き上り面となった中空セラミックス材が得られる。
【0011】
この棒状体としては、アルミナ、炭化珪素、窒化珪素等の高耐火度のものが好ましい。
【0012】
この実施の形態では、被焼成物をトンネル窯にて焼成しているが、支持台4をトレーに載せてローラーハースキルンに通しても良い。ただし、この場合振動によって棒状体がずれたり、被焼成物に応力が加えられるおそれがあるので、特に大きな被焼成物の場合などにはトンネル窯の方が適切である。なお、トンネル窯やローラーハースキルン以外の窯炉を用いても良い。
【0013】
この実施の形態では、被焼成物1に3個の貫通孔が設けられているが、貫通孔の数は2個又は4個以上であっても良い。また、幅広い貫通孔が1個だけ設けられていても良く、この場合には1個の貫通孔に複数本の棒状体3を通して、被焼成物1を荷重を分散させて均等に支承するのが好ましい。
【0014】
この実施の形態では、棒状体3が円柱形であるので、前記の通り、被焼成物1に熱膨張差に起因した応力が生じにくく、亀裂発生が防止されると共に、被焼成物1と棒状体3との融着も防止される。棒状体3は円柱形以外であっても良いが、長手方向と垂直な断面において少なくとも上面が円弧形断面形状となっていることが好ましい。
【0015】
被焼成物1は施釉されていても良く、施釉されていなくても良い。本発明では、被焼成物1の6面のすべてに施釉されていても、釉面が台車や窯炉内部部材に全く接触しないので、すべての面においてきわめて美麗な釉焼き上り面が得られる。
【0016】
上記実施の形態では、被焼成物1は、隣接した外面が直交平面よりなる直方体形状の板状となっているが、外面が曲面となっていても良く、凹凸を有していても良い。また、被焼成物は筒状のものであっても良い。
【0017】
被焼成物はセラミックス原料の成形体であっても良く、この成形体を仮焼したものであっても良い。
【0018】
本発明において、被焼成物の大きさは任意であり、例えば1辺が数cm大のものから数10cmないし数m程度のものであっても良い。支持台の高さも任意であるが、被焼成物と台車上面等との間にある程度以上の間隔をあけることにより、焼成時に被焼成物上面側の雰囲気と下面側の雰囲気とを同等とし、焼き上り時の色ムラや焼結ムラを解消することができる。
【0019】
【発明の効果】
以上の通り、本発明によると、外面の全体が美麗な焼き上り面となったセラミックスを高歩留りにて効率的に生産することができる。
【図面の簡単な説明】
【図1】実施の形態に係る中空セラミックス建材の焼成方法を示す斜視図である。
【符号の説明】
1 被焼成物
2 貫通孔
3 棒状体
4 支持台
5 台車
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for firing a hollow ceramic building material , and more particularly, to a method for firing a hollow ceramic building material capable of forming beautifully baked surfaces on all six surfaces.
[0002]
[Prior art]
When sintering a plate-like body such as a tile, the plate-like body is fired through a roller hearth kiln, or the body is baked on a refractory base plate for firing. When firing a hollow earthen tube, the earthen tube-shaped formed body is fired independently.
[0003]
[Problems to be solved by the invention]
When it is necessary to make all of the six surfaces beautifully baked, when the object to be fired is passed through a roller hearth kiln or when fired side by side on a floor plate, it comes into contact with the rollers in the roller hearth kiln or the floor plate Defects or defects such as scratches may occur on the surface, and many defective products are likely to occur.
[0004]
An object of the present invention is to provide a method for firing a hollow ceramic building material capable of firing ceramics having beautifully baked surfaces on all six surfaces at a high yield.
[0005]
[Means for Solving the Problems]
The method for firing a hollow ceramic building material according to the present invention is a method for firing an object to be fired having a through hole, wherein a refractory rod is passed through the through hole, and the object to be fired is suspended by the rod. A ceiling surface of the through-hole is a flat surface, and the flat surface is supported by a rod-shaped body.
[0006]
In the firing method of the present invention, since the object to be fired is hung from a rod-like body and fired, the outer surface of the object to be fired does not come into contact with a roller or a floor plate at all, and all six surfaces are beautifully baked. The hollow ceramic building material that has become the surface can be manufactured at a high yield.
[0007]
The object to be fired has a plate shape that is long in one direction, a plurality of through holes penetrates in the longitudinal direction, and the through holes are arranged in the width direction of the plate-shaped object to be fired. In this case, it is preferable to pass the rod-shaped body through at least the through holes at both ends in the width direction. As described above, by suspending the object to be fired through the rod-shaped body through the plurality of through holes, the posture of the rod-shaped body is stabilized, and the material to be fired is prevented from being bent in a manner called “set”. In this case, the rod-shaped body may be passed through all of the through holes. In this case, bending deformation of the object to be fired is reliably prevented.
[0008]
It is preferable that at least the upper surface of the rod-shaped body has an arc shape in a cross section perpendicular to the longitudinal direction such as a columnar body. Since the rod-shaped body having such an arc-shaped cross-section has a small contact area with the inner surface of the through hole (the ceiling surface of the hole), the material to be fired due to a difference in thermal expansion between the material to be fired and the rod during firing. The stress applied to the object is small, and the object to be fired is prevented from cracking. Further, since the contact area is small, fusion of the object to be fired and the rod-shaped body is also prevented.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a perspective view showing a method for firing a hollow ceramic building material according to an embodiment.
[0010]
The object 1 to be fired has a rectangular plate shape, and a plurality of (three in this embodiment) through holes 2 penetrate in the longitudinal direction. A cylindrical rod-shaped body 3 made of refractory material is inserted into each through-hole 2, and both ends of the rod-shaped body 3 protrude from the through-hole 2, and are loaded on the support 4. The support 4 has a concave groove on the upper surface, and the end of the rod 3 is engaged with the concave groove so that the rod 3 does not roll. The support table 4 is mounted or fixedly mounted on a cart 5. The bogie 1 is fired by passing the cart through a tunnel kiln (not shown). As shown in the figure, since the object to be fired 1 is fired in a state of being suspended by the rod-shaped body 3, all of the six surfaces of the object to be fired 1 do not come into contact with the cart 5, and all the six surfaces are beautifully baked. hollow ceramic building materials became surface is obtained.
[0011]
The rod-shaped body is preferably made of a material having a high fire resistance such as alumina, silicon carbide and silicon nitride.
[0012]
In this embodiment, the object to be fired is fired in a tunnel kiln, but the support 4 may be placed on a tray and passed through a roller hearth kiln. However, in this case, the rod-shaped body may be displaced by the vibration or stress may be applied to the object to be fired. Therefore, a tunnel kiln is more appropriate for a particularly large object to be fired. Note that a kiln other than a tunnel kiln or a roller hearth kiln may be used.
[0013]
In this embodiment, three through-holes are provided in the object 1 to be fired, but the number of through-holes may be two or four or more. Further, only one wide through-hole may be provided. In this case, it is preferable to distribute the load and support the object to be fired 1 evenly by passing a plurality of rods 3 through one through-hole. preferable.
[0014]
In this embodiment, since the rod-shaped body 3 has a cylindrical shape, as described above, the stress due to the difference in thermal expansion does not easily occur in the object 1 to be fired, cracks are prevented from being generated, and the object 1 and the rod-shaped object are formed. Fusion with the body 3 is also prevented. The rod-shaped body 3 may have a shape other than a columnar shape, but it is preferable that at least the upper surface of the cross-section perpendicular to the longitudinal direction has an arc-shaped cross-sectional shape.
[0015]
The object to be fired 1 may be glazed or not. In the present invention, even if glaze is applied to all six surfaces of the object 1 to be fired, the glaze surface does not come into contact with the bogie or the kiln interior member at all, so that a very beautiful glaze burnt surface can be obtained on all surfaces.
[0016]
In the above embodiment, the object 1 to be fired has a rectangular parallelepiped plate shape in which adjacent outer surfaces are orthogonal planes. However, the outer surface may be a curved surface or may have irregularities. Further, the object to be fired may be a cylindrical one.
[0017]
The object to be fired may be a formed body of a ceramic raw material, or a formed body obtained by calcining the formed body.
[0018]
In the present invention, the size of the object to be fired is arbitrary, and may be, for example, one side several cm larger to several tens cm to several meters. The height of the support table is also arbitrary, but by providing a certain distance or more between the object to be fired and the upper surface of the bogie, etc., the atmosphere on the upper surface side of the object to be fired and the atmosphere on the lower surface side are equivalent during firing, and firing is performed. Color unevenness and sintering unevenness during ascending can be eliminated.
[0019]
【The invention's effect】
As described above, according to the present invention, ceramics having a beautifully baked surface on the entire outer surface can be efficiently produced at a high yield.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a method for firing a hollow ceramic building material according to an embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 To-be-fired object 2 Through-hole 3 Rod-shaped body 4 Support stand 5

Claims (4)

貫通孔を有した被焼成物を焼成する方法において、該貫通孔に耐火物の棒状体を通し、この棒状体によって該被焼成物を吊して焼成する方法であって、
該貫通孔の天井面は平面であり、
該平面を棒状体によって支持することを特徴とする中空セラミックス建材の焼成方法。
In a method of firing a fired object having a through hole, a method of passing a refractory rod through the through hole, suspending the fired object with the rod, and firing.
The ceiling surface of the through hole is flat,
A method for firing a hollow ceramic building material , wherein the flat surface is supported by a rod.
請求項1において、該被焼成物は一方向に長い板状であり、その長手方向に複数の貫通孔が貫通しており、且つ各貫通孔は板状被焼成物の幅方向に配列されており、少なくとも幅方向両端側の貫通孔に前記棒状体を通すことを特徴とする中空セラミックス建材の焼成方法。In claim 1, the object to be fired has a plate shape that is long in one direction, a plurality of through holes penetrates in the longitudinal direction, and each through hole is arranged in the width direction of the plate-shaped object to be fired. A method of firing a hollow ceramic building material , wherein the rod-shaped body is passed through at least through holes at both ends in the width direction. 請求項2において、すべての貫通孔に棒状体を通すことを特徴とする中空セラミックス建材の焼成方法。3. The method for firing a hollow ceramic building material according to claim 2, wherein the rod-shaped body is passed through all the through holes. 請求項1ないし3のいずれか1項において、該棒状体は、長手方向と垂直な断面において少なくとも上面が円弧状であることを特徴とする中空セラミックス建材の焼成方法。The method for firing a hollow ceramic building material according to any one of claims 1 to 3, wherein at least the upper surface of the rod-shaped body has an arc shape in a cross section perpendicular to the longitudinal direction.
JP11516999A 1999-04-22 1999-04-22 Method for firing hollow ceramic building materials Expired - Fee Related JP3557945B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11516999A JP3557945B2 (en) 1999-04-22 1999-04-22 Method for firing hollow ceramic building materials

Publications (2)

Publication Number Publication Date
JP2000302529A JP2000302529A (en) 2000-10-31
JP3557945B2 true JP3557945B2 (en) 2004-08-25

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