JPH0822786B2 - Manufacturing method of porous ceramic plate - Google Patents
Manufacturing method of porous ceramic plateInfo
- Publication number
- JPH0822786B2 JPH0822786B2 JP62254489A JP25448987A JPH0822786B2 JP H0822786 B2 JPH0822786 B2 JP H0822786B2 JP 62254489 A JP62254489 A JP 62254489A JP 25448987 A JP25448987 A JP 25448987A JP H0822786 B2 JPH0822786 B2 JP H0822786B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic plate
- porous ceramic
- belt
- roll
- producing
- 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 - Lifetime
Links
- 239000000919 ceramic Substances 0.000 title claims description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 238000005187 foaming Methods 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 17
- 238000010304 firing Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000010583 slow cooling Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005306 natural glass Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は多孔質セラミック板の製法に関する。さらに
詳しくは、成形体を確実に加圧一体化せしめ焼成板内に
連通気孔が形成されるのを防止できるとともに、優れた
表面平滑性をうることのできる多孔質セラミック板の製
法に関する。The present invention relates to a method for producing a porous ceramic plate. More specifically, the present invention relates to a method for producing a porous ceramic plate that can reliably form a pressure-integrated molded body to prevent the formation of continuous air holes in the fired plate, and can obtain excellent surface smoothness.
［従来の技術］ 多孔質セラミック板は、まだ一般的には用いられてい
ないが、軽量で取扱いが容易であり、保温性、耐火性、
耐久性などに優れているためプレハブ住宅などにおいて
その使用が検討されている。[Prior Art] Porous ceramic plates have not been generally used yet, but are lightweight, easy to handle, heat-retaining, fire-resistant,
Due to its excellent durability, its use is being considered in prefabricated houses.
かかる多孔質セラミック板は、一般に天然ガラス、人
工ガラス、多孔質火山岩、火成岩、堆積岩、凝灰岩など
を主原料とし、これらを発泡せしめ、発泡時にベルトで
上方より押圧するか、もしくは発泡軟化後に成形体を加
圧ロールなどで加圧して融着させ同時に成形することで
えられる。Such a porous ceramic plate is generally made of natural glass, artificial glass, porous volcanic rock, igneous rock, sedimentary rock, tuff, etc. as main raw materials, and these are foamed and pressed from above with a belt at the time of foaming, or a molded body after foam softening. Can be obtained by pressurizing with a pressure roll or the like to fuse and simultaneously form.
ベルトによる加圧は、一般に第３図に示すように、加
熱発泡工程における成形体をベルト（16）にて上方より
連続的かつ平面的に加圧するものである。As shown in FIG. 3, the pressure applied by the belt is generally such that the molded product in the heat-foaming step is continuously and planarly pressed by the belt (16) from above.
また、ロールによる加圧は、一般に実公昭53−50759
号公報に示されるごとき被焼成体の上下に対になって配
置されたロールを用いて行なわれる。該上下２段タイプ
のロールは、第４図に示すように、被焼成体の上方と下
方に対応するようにロール（18）を設け、両方のロール
により発泡軟化後の被焼成体を押圧して被焼成体の表裏
両面に均質な焼結面を施さんとするものである。In addition, the pressure applied by the roll is generally in practice
This is performed using rolls arranged in pairs above and below the body to be fired, as shown in Japanese Patent Publication No. As shown in FIG. 4, the upper and lower two-stage type rolls are provided with rolls (18) corresponding to the upper side and the lower side of the body to be fired, and both rolls press the body to be fired after foam softening. As a result, a uniform sintered surface is provided on both front and back surfaces of the object to be fired.
［発明が解決しようとする問題点］ しかしながら、前記従来例は、それぞれ発泡工程中の
み（ベルトのばあい）、もしくは発泡軟化後のみ（ロー
ルのばあい）に加圧成形を行なうものであり、焼成板の
一体性、表面平滑性などにおいて問題点を有している。[Problems to be Solved by the Invention] However, in the conventional example, pressure molding is performed only during the foaming process (when the belt is used) or only after foam softening (when the roll is used). There are problems in the integrity and surface smoothness of the fired plate.
すなわち、ベルトを用いるばあいは、加熱発泡中に加
圧が行なわれるわけであるが、成形体は下面の搬送用ベ
ルトと上面の加圧用ベルトとの限定された空間で発泡す
るため、発泡圧により加圧用ベルト内に設置されたロー
ルとロールのあいだが厚くなってしまい、とくに成形体
上面にロールピッチに等しい波形が残るという問題があ
る。この波形は、成形体が加圧用ベルトと一体となって
焼成炉内を移動しており、ベルトを介して該成形体が押
圧されているので容易に消えることがなく、できあがっ
た製品の大きな欠陥となっていた。またベルトによる加
圧では成形体表面に任意のレリーフ模様を施すことがで
きないという欠点もある。That is, when a belt is used, pressure is applied during heat foaming, but since the molded body foams in a limited space between the conveyor belt on the lower surface and the pressure belt on the upper surface, the foaming pressure is increased. As a result, there is a problem that the rolls installed in the pressure belt become thicker between the rolls, and a corrugation equal to the roll pitch remains on the upper surface of the molded body. This corrugation does not disappear easily because the molded body is moving in the firing furnace together with the pressing belt and is pressed through the belt, and it is a major defect of the finished product. It was. Further, there is a drawback that an arbitrary relief pattern cannot be applied to the surface of the molded product by pressing with the belt.
一方、ロールによる加圧は、発泡を終えた成形体を上
面より加圧し一体化するものであり、造粒された発泡原
料の積層が加熱され、それぞれの粒が発泡して点接触の
状態で体積を増した層の上面よりロールにより押圧する
ものである。オール圧は拡散し、また内部も軟くその押
圧は浸透せず粒界の空隙を潰すこともできず、上面の発
泡粒の形も平滑にすることもできない。したがって、粒
界に気孔が残ってしまい、この気孔がしばしば連続して
連通気孔を形成するので、焼成板の断熱性能、防水性能
が低下してしまうという問題点がある。また、発泡後の
ロールのみによる加圧では前記したごとく良好な表面平
滑性をうることが困難であるという問題がある。On the other hand, the pressure applied by the roll is to press and integrate the foamed molded product from the upper surface, and the lamination of the granulated foaming raw material is heated, and each particle is foamed to form a point contact state. The roll is pressed from the upper surface of the layer having an increased volume. The all pressure is diffused, the inside is soft, the pressure does not penetrate, the voids at the grain boundaries cannot be crushed, and the shape of the foamed grains on the upper surface cannot be smoothed. Therefore, pores remain in the grain boundaries, and these pores often form continuous ventilation holes, which causes a problem that the heat insulating performance and waterproof performance of the fired plate are deteriorated. Further, there is a problem that it is difficult to obtain good surface smoothness as described above by applying pressure only by the roll after foaming.
本発明は、前記の点に鑑み、優れた一体性、寸法精
度、表面平滑性をうることのできる多孔質セラミック板
の製法を提供することを目的とする。The present invention has been made in view of the above points, and an object thereof is to provide a method for producing a porous ceramic plate capable of obtaining excellent integrity, dimensional accuracy, and surface smoothness.
［問題点を解決するための手段］ 本発明の多孔質セラミック板の製法は、発泡性無機質
原料を焼成炉内で加熱、押圧して多孔質セラミック板を
製造するに際し、加熱発泡工程で成形体を該成形体の上
方より一次加圧し、加熱発泡工程後の徐冷工程において
一次加圧せられた成形体を該成形体の上方より二次加圧
することを特徴としている。[Means for Solving Problems] The method for producing a porous ceramic plate of the present invention is a method for producing a porous ceramic plate by heating and pressing an expandable inorganic raw material in a firing furnace, and forming a molded product in a heating and foaming step. Is primarily pressurized from above the molded body, and the molded body that has been primarily pressurized in the slow cooling step after the heating and foaming step is secondarily pressurized from above the molded body.
［実施例］ つぎに図面にもとづき本発明の多孔質セラミック板の
製法を説明する。[Example] Next, a method for producing the porous ceramic plate of the present invention will be described with reference to the drawings.
第１図は、本発明の多孔質セラミック板の製法に用い
られる焼成炉の一実施例の概略説明図である。FIG. 1 is a schematic explanatory view of an embodiment of a firing furnace used in the method for producing a porous ceramic plate of the present invention.
第１図において、（１）は焼成炉であって該焼成炉
（１）内には多孔質セラミック板（２）を搬送するベル
トコンベア（３）が設置されている。該ベルトコンベア
（３）は、ステンレス帯鋼からなるベルトを用いること
もできるが、発泡時の揮散成分を上下面から均一拡散さ
せ、かつ、上下面ともに均一な熱伝達を行なうためメッ
シュ状のものを用いるのが好ましく、たとえばステンレ
スメッシュベルトにセラミックコーティングしたもの、
セラミックベルトなどが用いられる。In FIG. 1, (1) is a firing furnace, and a belt conveyor (3) for transporting a porous ceramic plate (2) is installed in the firing furnace (1). As the belt conveyor (3), a belt made of stainless steel strip may be used, but a mesh-shaped one for uniformly dispersing the volatilized components at the time of foaming from the upper and lower surfaces and uniformly transferring heat to the upper and lower surfaces. It is preferable to use, for example, a stainless mesh belt coated with ceramic,
A ceramic belt or the like is used.
被焼成体である発泡性無機質原料としては、天然ガラ
ス、人工ガラス、多孔質火山岩、火成岩、凝灰岩などか
らなる混合物を粉砕したのちにペレット化したものが用
いられ、該ペレットは供給ホッパー（４）よりベルトコ
ンベア上に適宜の量供給される。供給されたペレット
は、予備ロール（５）によりならされてほぼ均一な厚さ
となって焼成炉（１）内へ送り込まれる。その後ペレッ
トは昇温ゾーンで昇温され、つづく焼成ゾーンで加熱さ
れ発泡軟化する。昇温は原料の粒度、配合などにより異
なるが、たとえば１分間に80℃の割合で昇温すればよ
く、本発明においてはとくに限定されるものではない。
焼成温度も昇温同様に原料の粒度、発泡温度、原料の気
孔径の均一性などにより異なるが概ね700〜1100℃が目
安である。また焼成時間も原料の溶融温度、原料の発泡
速度、原料の気孔径の均一性などに応じて適宜選定すれ
ばよい。As the expandable inorganic raw material that is the object to be fired, a mixture of natural glass, artificial glass, porous volcanic rock, igneous rock, tuff, etc., which has been crushed and then pelletized, is used. An appropriate amount is supplied on the belt conveyor. The supplied pellets are leveled by the preliminary roll (5) to have a substantially uniform thickness and fed into the firing furnace (1). After that, the pellets are heated in the temperature rising zone and then heated in the subsequent firing zone to foam and soften. The temperature rise depends on the particle size of the raw material, the composition, etc., but may be raised at a rate of 80 ° C. per minute, for example, and is not particularly limited in the present invention.
The firing temperature also varies depending on the particle size of the raw material, the foaming temperature, the uniformity of the pore diameter of the raw material, etc., as in the case of raising the temperature, but a rule of thumb is 700 to 1100 ° C. Further, the firing time may be appropriately selected depending on the melting temperature of the raw material, the foaming rate of the raw material, the uniformity of the pore diameter of the raw material, and the like.
本発明の製法においては、前記のごとく加熱発泡せら
れた多孔質セラミック板の加圧成形工程に特徴がある。
すなわち、本発明の製法は加熱発泡工程中に一次加圧を
して、多孔質セラミック板の概ねの厚さ方向の寸法精度
および表面平滑性を確保したのち、多孔質セラミック板
の徐冷工程において二次加圧を施し、所望の寸法精度お
よび表面平滑性をうることに特徴がある。このように、
多孔質セラミック板の加圧成形工程を、発泡中と発泡後
の両方で行なうことにより、従来いずれかの工程でのみ
行なわれていた方法に比べ、優れた寸法精度および表面
平滑性を簡易にうることができるとともに、連通気孔の
形成により防水性、断熱性が低下するという問題を効果
的に解決することができる。The manufacturing method of the present invention is characterized by the step of pressure-molding the porous ceramic plate heat-foamed as described above.
That is, in the manufacturing method of the present invention, primary pressure is applied during the heat-foaming step to ensure dimensional accuracy and surface smoothness in the general thickness direction of the porous ceramic plate, and then in the step of gradually cooling the porous ceramic plate. The feature is that secondary dimensional pressure is applied to obtain desired dimensional accuracy and surface smoothness. in this way,
By performing the pressure-forming step of the porous ceramic plate both during foaming and after foaming, superior dimensional accuracy and surface smoothness can be easily achieved compared to the method that has been conventionally performed only in either step. In addition, it is possible to effectively solve the problem that the waterproof property and the heat insulating property are deteriorated due to the formation of the communication holes.
一次加圧は、加熱発泡中におおむねの寸法精度、表面
平滑性を確保するために行なわれ、第１図に示すような
ステンレスメッシュベルト、ステンレス帯鋼などのベル
ト（６）や、ロールを用いて行なわれる。成形体を連続
的、平面的に押圧して発泡粒界を充分に潰すという点か
らは一次加圧にはベルトを用いるのが好ましいが、ロー
ルを用いるときは、離型剤の塗布が不要になる、多孔質
セラミック板の表面にメッシュの目が出ない（ベルトに
メッシュベルトを用いるときはメッシュの目が残ってし
まう）、ベルトに比べ耐久性に優れる、スケールが発生
しない、などのメリットがある。The primary pressurization is performed in order to secure dimensional accuracy and surface smoothness during heating and foaming, and a stainless mesh belt as shown in FIG. 1, a belt (6) such as stainless steel strip, or a roll is used. Will be performed. It is preferable to use a belt for primary pressing from the viewpoint that the foamed grain boundary is sufficiently crushed by continuously and planarly pressing the molded body, but when using a roll, it is not necessary to apply a release agent. There are advantages such as no mesh eyes appearing on the surface of the porous ceramic plate (when the mesh belt is used, the mesh eyes remain), it is more durable than the belt, and scale does not occur. is there.
融着防止にロール内をエアー冷却して用いるので燃料
費が高くなるが、メッシュベルトの酸化スケール、離型
剤などにより表面トラブルが発生しないので、一次加圧
は、できるだけロール間隔を狭くしたロール加圧を採用
するのが好ましい。Fuel cost is high because the roll is air-cooled to prevent fusion, but surface troubles do not occur due to the oxide scale of the mesh belt and mold release agent. It is preferable to use pressure.
ベルトを用いるばあい、ベルトの長さはとくに限定さ
れないが概ね２〜6mが目安である。ベルト（６）中に
は、鋳鋼などからなり、径が160φ程度のロール（７）
が適宜の間隔（たとえば250〜300mmピッチ）で配置され
ており、該ロール（７）の働きにより成形体は押圧され
る。When using a belt, the length of the belt is not particularly limited, but a guideline is about 2 to 6 m. The belt (6) is made of cast steel and has a diameter of about 160φ (7)
Are arranged at appropriate intervals (for example, 250 to 300 mm pitch), and the molded body is pressed by the action of the roll (7).
発泡軟化後の成形体は、徐冷工程において、ロール
（８）によって二次加圧される。ロール（８）の径、材
質、ピッチなどはとくに限定はなく、前述したベルト
（６）内のロール（７）と同様のものを用いることがで
きる。また、ロール（８）は少なくとも１本設ければよ
く、本発明においてとくにその数が限定されるものでは
ないが、複数本のロールを設置したばあい、段階的に多
孔質セラミック板（２）を押圧することができ、より正
確な寸法と平滑性をもった製品をうることができる。The molded body after the foam softening is secondarily pressed by the roll (8) in the slow cooling step. The diameter, material, pitch, etc. of the roll (8) are not particularly limited, and those similar to the roll (7) in the belt (6) described above can be used. Further, at least one roll (8) may be provided, and the number of rolls is not particularly limited in the present invention. However, when a plurality of rolls are installed, the porous ceramic plate (2) is gradually provided. Can be pressed, and a product having more accurate dimensions and smoothness can be obtained.
二次加圧に際し、第2a図および第2b図に示すごとき形
状の凸凹ロールで成形体を加圧することで、成形体に所
望のレリーフ模様を与えるようにしてもよい。このばあ
いに、二次加圧用ロールとして複数本のロールを用いる
ときは、該ロールのうち最終ロールのみを凸凹ロールと
してもよいし、最後の２本以上を凸凹ロールとして段階
的に凸凹を付与するようにしてもよい。At the time of the secondary pressurization, a desired relief pattern may be given to the compact by pressing the compact with an uneven roll having a shape as shown in FIGS. 2a and 2b. In this case, when a plurality of rolls are used as the secondary pressing roll, only the final roll of the rolls may be uneven rolls, or the last two or more rolls may be uneven rolls to provide unevenness You may do it.
なお、第１図に示されるようにベルトコンベア（３）
を二次加圧用ロール（８）の最初のロールの直前で多孔
質セラミック板と分かれさせ、ロールの外側を走行する
ようにし、二次加圧を多孔質セラミック板の上面および
下面と直接に接触回転する押圧ロールで行なうときは、
寸法精度が高くなる、ネットを介しておらず急冷が可能
である、裏面のネット跡がなくなり表面が平滑になるな
どの効果がある。In addition, as shown in FIG. 1, a belt conveyor (3)
Is separated from the porous ceramic plate just before the first roll of the secondary pressure roll (8) so that it runs outside the roll, and the secondary pressure directly contacts the upper surface and the lower surface of the porous ceramic plate. When using a rotating pressure roll,
The dimensional accuracy is high, rapid cooling is possible without a net, and there are no net marks on the back surface, resulting in a smooth surface.
第１図において、（９）は多孔質セラミック板を炉外
へ搬出する搬送用ロールである。In FIG. 1, (9) is a carrying roll for carrying the porous ceramic plate out of the furnace.
つぎに実施例にもとづき本発明の多孔質セラミック板
の製法を説明するが、本発明はもとよりかかる実施例に
限定されるものではない。Next, the method for producing the porous ceramic plate of the present invention will be described based on Examples, but the present invention is not limited to such Examples as a matter of course.
実施例１ Al2O3−SiO2鉱物を主原料とする発泡性造粒原料を供
給ホッパーよりベルトコンベア上へ供給し、900℃で焼
成を行なった。焼成時には、以下のごとき条件でベルト
により一次加圧を行なった。Example 1 An expandable granulation raw material containing Al 2 O 3 —SiO 2 mineral as a main raw material was supplied from a supply hopper onto a belt conveyor, and calcined at 900 ° C. During firing, the belt was subjected to primary pressure under the following conditions.
ベルト材質：ステンレスメッシュベルト ベルトの長さ:4m ロール径:160φ ロールのピッチ:230mm 一次加圧後、徐冷工程において以下のごとき条件でロ
ールによる二次加圧を行なった。Belt material: Stainless steel mesh belt Length of belt: 4 m Roll diameter: 160φ Roll pitch: 230 mm After primary pressurization, secondary pressurization with rolls was performed in the slow cooling process under the following conditions.
ロール数:3本 ロール径:160φ ロールのピッチ:230mm えられた多孔質セラミック板について表面粗さを測定
した。面全体は平滑を保ち滑らかであり、発泡粒界にと
ころどころ0.2m/m程度の凹が見られるものの全体として
は目立たない程度である。Number of rolls: 3 Roll diameter: 160φ Roll pitch: 230 mm The surface roughness of the obtained porous ceramic plate was measured. The entire surface was smooth and smooth, and although there were some depressions of 0.2 m / m in the foamed grain boundaries, it was inconspicuous as a whole.
比較例１ Al2O3−SiO2鉱物を主原料とする発泡性造粒原料をホ
ッパーよりベルトコンベア上へ供給し、900℃で焼成を
行なった。Comparative Example 1 An expandable granulation raw material containing Al 2 O 3 —SiO 2 mineral as a main raw material was supplied from a hopper onto a belt conveyor and fired at 900 ° C.
焼成時に、以下のごとき条件で加圧成形を行なった。 During firing, pressure molding was performed under the following conditions.
ベルト材質:SAS−310S ベルトの長さ:4m ロール（ベルト内）径:160φ ロールのピッチ:230mm えられた多孔質セラミック板について表面粗さを測定
した。発泡粒界は潰され平滑であるが約23cmピッチで凸
部があり、この山と谷との差は0.5m/mであった。また、
全体にベルトの跡がありその高低差は0.4〜1.3m/mと大
きく縞模様を形成していた。Belt material: SAS-310S Belt length: 4 m Roll (inside the belt) Diameter: 160 φ Roll pitch: 230 mm The surface roughness of the obtained porous ceramic plate was measured. The foam grain boundaries were crushed and smooth, but there were protrusions at a pitch of about 23 cm, and the difference between the peaks and valleys was 0.5 m / m. Also,
There were belt marks on the whole, and the height difference was 0.4 to 1.3 m / m, forming a large striped pattern.
比較例２ Al2O3−SiO2鉱物を主原料とする発泡性造粒原料を供
給ホッパーよりベルトコンベア上へ供給し、900℃で焼
成を行なった。焼成後の徐冷工程に以下のごとき条件で
ロールによる加圧成形を行なった。Comparative Example 2 An expandable granulation raw material containing Al 2 O 3 —SiO 2 mineral as a main raw material was supplied onto a belt conveyor from a supply hopper and calcined at 900 ° C. In the slow cooling step after firing, pressure molding with a roll was performed under the following conditions.
ロール数:3本 ロール径:160φ ロールのピッチ:230mm えられた多孔質セラミック板について表面粗さを測定
した。全体として平滑であるが発泡粒が潰れず半球の形
をそのままとどめ、粒界はほとんど潰れていない。凹は
深いところで3.0m/mもあり、その奥には内部に通じる孔
があった。Number of rolls: 3 Roll diameter: 160φ Roll pitch: 230 mm The surface roughness of the obtained porous ceramic plate was measured. Although it is smooth as a whole, the expanded grains do not collapse and retain the hemispherical shape as it is, and the grain boundaries are hardly collapsed. The recess was 3.0 m / m deep and there was a hole in the back that communicated with the interior.
［発明の効果］ 以上説明したとおり、本発明の製法によれば、加熱発
泡工程での一次加圧で概ねの寸法精度、表面平滑性を確
保し、徐冷工程での二次加圧で仕上げ加圧を行なうよう
にしているので、従来の方法に比べ優れた寸法精度およ
び表面平滑性をうることができるとともに、発泡粒界を
充分に潰すことができるので連通気孔が形成されること
がなく、断熱性、防水性に優れた多孔質セラミック板を
うることができるという効果がある。また、二次加圧を
多孔質セラミック板と直接に接触するロールで行なうと
きは、寸法精度が高くなり、急冷が可能となり、さらに
裏面のネット跡がなくなり表面が平滑になるという効果
がある。さらに二次加圧において凹凸ロールを用いると
きは、多孔質セラミック板に所望の凸凹模様を付するこ
とができ、装飾性を高めることができる。[Effects of the Invention] As described above, according to the manufacturing method of the present invention, the primary pressurization in the heating and foaming step ensures the dimensional accuracy and the surface smoothness, and the secondary pressurization in the slow cooling step completes the finish. Since pressurization is performed, superior dimensional accuracy and surface smoothness can be obtained as compared with the conventional method, and the foamed grain boundary can be sufficiently crushed, so that no continuous ventilation hole is formed. Further, there is an effect that it is possible to obtain a porous ceramic plate having excellent heat insulating properties and waterproof properties. In addition, when the secondary pressurization is performed by the roll that is in direct contact with the porous ceramic plate, the dimensional accuracy is improved, rapid cooling is possible, and there is the effect that the net mark on the back surface is eliminated and the surface is smooth. Furthermore, when using a concave-convex roll in the secondary pressurization, a desired uneven pattern can be provided on the porous ceramic plate, and decorativeness can be improved.
第１図は本発明の多孔質セラミック板の製法に用いられ
る焼成炉の一実施例を示す概略説明図、第2a図および第
2b図は凸凹の断面形状を有するロールの概略斜視図、第
３図はベルトにより加熱発泡工程で加圧成形を行なう従
来の焼成炉の概略説明図、第４図はロールにより徐冷工
程で加圧成形を行なう従来の焼成炉の概略説明図であ
る。 （図面の主要符号） （１）：焼成炉 （２）：多孔質セラミック板 （６）：ベルト（一次加圧用） （８）：ロール（二次加圧用）FIG. 1 is a schematic explanatory view showing an embodiment of a firing furnace used in the method for producing a porous ceramic plate of the present invention, FIG. 2a and FIG.
Fig. 2b is a schematic perspective view of a roll having an uneven cross-sectional shape, Fig. 3 is a schematic explanatory diagram of a conventional firing furnace in which pressure molding is performed by a belt in a heating and foaming process, and Fig. 4 is an annealing process by a roll. It is a schematic explanatory drawing of the conventional baking furnace which performs pressure forming. (Main symbols in the drawing) (1): Baking furnace (2): Porous ceramic plate (6): Belt (for primary pressing) (8): Roll (for secondary pressing)
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−170864（ＪＰ，Ａ) 特開 昭57−170865（ＪＰ，Ａ) ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-57-170864 (JP, A) JP-A-57-170865 (JP, A)
Claims (5)
して多孔質セラミック板を製造するに際し、加熱発泡工
程で成形体を該成形体の上方より一次加圧し、加熱発泡
工程後の徐冷工程において一次加圧せられた成形体を該
成形体の上方より二次加圧することを特徴とする多孔質
セラミック板の製法。1. When a foamable inorganic raw material is heated and pressed in a firing furnace to produce a porous ceramic plate, a molded body is primarily pressurized from above the molded body in the heating and foaming step, and after the heating and foaming step. A method for producing a porous ceramic plate, characterized in that a molded body that has been primarily pressed in a slow cooling step is secondarily pressed from above the molded body.
られたベルトで行ない、二次加圧を、搬送路に直交して
設けられた適宜の数の押圧ロールで行なう特許請求の範
囲第１項記載の多孔質セラミック板の製法。2. A primary pressurization is carried out by a belt provided in parallel with a conveying path in the firing furnace, and a secondary pressurization is carried out by an appropriate number of pressing rolls provided orthogonally to the conveying path. 2. A method for producing a porous ceramic plate according to claim 1.
レス帯鋼からなるベルトである特許請求の範囲第２項記
載の多孔質セラミック板の製法。3. The method for producing a porous ceramic plate according to claim 2, wherein the belt is a mesh belt or a belt made of stainless steel strip.
して設けられた適宜の数の押圧ロールで行なう特許請求
の範囲第１項記載の多孔質セラミック板の製法。4. The method for producing a porous ceramic plate according to claim 1, wherein the primary pressurization and the secondary pressurization are performed by an appropriate number of pressing rolls provided orthogonally to the conveying path.
ベアが二次加圧用押圧ロールの最初のロールの直前に多
孔質セラミック板と分かれロールの外側を走行するよう
にし、二次加圧を多孔質セラミック板の上面および下面
と直接に接触回転する適宜の数の押圧ロールで行なう特
許請求の範囲第４項記載の多孔質セラミック板の製法。5. A belt conveyor for transporting the porous ceramic plate separates from the porous ceramic plate immediately before the first roll of the secondary pressure pressing roll and runs outside the roll so that the secondary pressure is porous. The method for producing a porous ceramic plate according to claim 4, which is carried out by an appropriate number of pressing rolls that rotate in direct contact with the upper surface and the lower surface of the ceramic plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62254489A JPH0822786B2 (en) | 1987-05-22 | 1987-10-08 | Manufacturing method of porous ceramic plate |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-126778 | 1987-05-22 | ||
| JP12677887 | 1987-05-22 | ||
| JP62254489A JPH0822786B2 (en) | 1987-05-22 | 1987-10-08 | Manufacturing method of porous ceramic plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6476978A JPS6476978A (en) | 1989-03-23 |
| JPH0822786B2 true JPH0822786B2 (en) | 1996-03-06 |
Family
ID=26462904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62254489A Expired - Lifetime JPH0822786B2 (en) | 1987-05-22 | 1987-10-08 | Manufacturing method of porous ceramic plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0822786B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601851A (en) * | 2012-04-13 | 2012-07-25 | 佛山市宝岩机器制造有限公司 | Distributing device capable of generating inclined strip texture |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116283340B (en) * | 2022-12-12 | 2024-02-09 | 东北大学 | Technology for preparing foaming ceramic wallboard by using boric sludge without die bare firing |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4982714A (en) * | 1972-12-13 | 1974-08-09 | ||
| JPS502706A (en) * | 1973-05-11 | 1975-01-13 | ||
| JPS5065513A (en) * | 1973-10-09 | 1975-06-03 | ||
| JPS5645879B2 (en) * | 1973-12-25 | 1981-10-29 | ||
| JPS5530832Y2 (en) * | 1976-09-30 | 1980-07-23 | ||
| JPS55134283A (en) * | 1979-04-04 | 1980-10-18 | Hitachi Ltd | Continuously heating*pressurizing type sintering machine |
| JPS57170864A (en) * | 1981-04-13 | 1982-10-21 | Asahi Chemical Ind | Foam formed body manufacturing device |
| JPS57170865A (en) * | 1981-04-13 | 1982-10-21 | Asahi Chemical Ind | Foamed body formation and device |
-
1987
- 1987-10-08 JP JP62254489A patent/JPH0822786B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601851A (en) * | 2012-04-13 | 2012-07-25 | 佛山市宝岩机器制造有限公司 | Distributing device capable of generating inclined strip texture |
| CN102601851B (en) * | 2012-04-13 | 2014-01-15 | 佛山市宝岩机器制造有限公司 | Cloth device that produces diagonal stripes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6476978A (en) | 1989-03-23 |
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