JP2883150B2 - Cooling method in autoclave curing - Google Patents
Cooling method in autoclave curingInfo
- Publication number
- JP2883150B2 JP2883150B2 JP7597290A JP7597290A JP2883150B2 JP 2883150 B2 JP2883150 B2 JP 2883150B2 JP 7597290 A JP7597290 A JP 7597290A JP 7597290 A JP7597290 A JP 7597290A JP 2883150 B2 JP2883150 B2 JP 2883150B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- temperature
- panel
- pressure
- predetermined high
- 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
Landscapes
- Producing Shaped Articles From Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えば外壁材等として使用される軽量気泡
コンクリート製パネルを製造するオートクレーブ養生に
おいて、含水率の低いパネルを得るための降温方法に関
する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling method for obtaining a panel having a low moisture content in an autoclave curing for manufacturing a lightweight cellular concrete panel used as, for example, an outer wall material. .
オートクレーブ養生は、第３図の通り、型枠から脱型
して得られた複数の軽量気泡コンクリート製原版１を台
車２に載せ、この台車２を炉３内に入れることにより原
版１を炉３内に収納し、この後、炉３内にスチームを供
給することにより炉３内を所定の高温度（例えば約180
℃）、所定の高圧力（例えば約10気圧）にして行われ
る。これにより、軽量気泡コンクリート製原版１の養生
が行われて軽量気泡コンクリート製パネル１′が製造さ
れる。前記所定の高温後、所定の高圧力下での養生が終
了した後、炉３内へのスチームの供給は停止され、この
後、炉３内の圧力は大気圧まで降圧されるとともに、温
度は炉３の扉を開けることができる温度（例えば５〜80
℃）に降温され、次いで台車２が炉３から引き出されて
軽量気泡コンクリート製パネル１′の取り出しが行われ
る。As shown in FIG. 3, the autoclave curing is performed by placing a plurality of lightweight foamed concrete masters 1 obtained by demolding from a mold on a carriage 2 and placing the carriages 2 in a furnace 3 so that the master 1 is Then, steam is supplied into the furnace 3 so that the inside of the furnace 3 is heated to a predetermined high temperature (for example, about 180 ° C.).
C.) and a predetermined high pressure (for example, about 10 atm). Thereby, the lightweight foam concrete original plate 1 is cured, and the lightweight foam concrete panel 1 'is manufactured. After the curing under the predetermined high pressure after the predetermined high temperature, the supply of steam into the furnace 3 is stopped. Thereafter, the pressure in the furnace 3 is reduced to the atmospheric pressure, and the temperature is reduced. Temperature at which the door of the furnace 3 can be opened (for example, 5-80
° C), and then the carriage 2 is pulled out of the furnace 3 to take out the lightweight cellular concrete panel 1 '.
炉３内の温度を炉３の扉を開けることができる前記温
度まで降温させる方法は、従来では、第３図で示す給水
管10から水を傘状カバー11の上面に流し、これにより炉
３の内壁面に散水するものであった。Conventionally, a method of lowering the temperature in the furnace 3 to the temperature at which the door of the furnace 3 can be opened is to flow water from a water supply pipe 10 shown in FIG. Was sprayed on the inner wall of the house.
以上の従来方法によると、炉３内の温度が100℃以上
のときには、炉３内に散水された水は蒸発して水蒸気と
なるが、炉３内の温度が100℃以下まで下がると、炉３
内の各部分に結露する。カバー11の下面に結露した水滴
はパネル１′表面に落下し、このパネル１′が濡れるこ
とになる。炉３から取り出されたパネル１′は、断熱性
を高めるため乾燥工程に送られ乾燥されるが、以上のよ
うにパネル１′の表面に水滴が付着してパネル１′が濡
れていると、充分に乾燥できず、パネル１′からの水分
の除去を所定通り行えないため、パネル１′の断熱性が
低下するという問題が生ずる。According to the above conventional method, when the temperature in the furnace 3 is 100 ° C. or higher, the water sprinkled in the furnace 3 evaporates and becomes steam, but when the temperature in the furnace 3 drops to 100 ° C. or lower, the furnace 3 3
Condensation on each part inside. Water droplets condensed on the lower surface of the cover 11 fall on the surface of the panel 1 ', and the panel 1' gets wet. The panel 1 'taken out of the furnace 3 is sent to a drying step to enhance the heat insulating property and is dried. As described above, when the water droplets adhere to the surface of the panel 1' and the panel 1 'is wet, Since it cannot be dried sufficiently and water cannot be removed from the panel 1 ′ as predetermined, there arises a problem that the heat insulation of the panel 1 ′ is reduced.
また、従来方法では、炉３内の温度が100℃以下にな
ると、パネル１′内の水は水蒸気にならないため、パネ
ル１′の温度は気化熱によって降温しなくなり、このた
め100℃以下ではパネル１′の温度ひいては炉３内の温
度の降温速度が低下するとともに、パネル１′からの水
分の除去が充分に行われなくなってしまう。In addition, in the conventional method, when the temperature in the furnace 3 becomes 100 ° C. or less, the water in the panel 1 ′ does not turn into steam, so that the temperature of the panel 1 ′ does not decrease due to the heat of vaporization. At the same time, the temperature of the furnace 1 ', and hence the temperature in the furnace 3, is lowered, and the removal of water from the panel 1' is not performed sufficiently.
更に、従来方法によると、給水管10から炉３内に供給
される水は、最後には炉３やパネル１′から除去される
ものであるため、無駄な水を炉３内に供給しているとい
う問題もあった。Further, according to the conventional method, since the water supplied from the water supply pipe 10 into the furnace 3 is finally removed from the furnace 3 and the panel 1 ′, wasteful water is supplied into the furnace 3. There was also a problem that there is.
本発明の目的は、軽量気泡コンクリート製パネルの表
面に水滴が付着することがなく、また、炉内温度が100
℃以下になっても適切な速度でパネルの温度を降温でき
るとともに、パネルからの水分の除去を確実に行え、さ
らに、炉内に無駄な水を供給することが不要になるオー
トクレーブ養生における降温方法を提供するところにあ
る。An object of the present invention is to prevent water droplets from adhering to the surface of a lightweight cellular concrete panel and to reduce the temperature in the furnace to 100%.
Even if the temperature falls below ℃, the temperature of the panel can be lowered at an appropriate speed, moisture can be reliably removed from the panel, and furthermore, there is no need to supply waste water into the furnace. Is to provide.
本発明に係るオートクレーブ養生における降温方法
は、軽量気泡コンクリート製原版を炉内に収納した後、
炉内にスチームを供給して所定の高温度、所定の高圧力
下で前記原版を養生することにより軽量気泡コンクリー
ト製パネルを製造するオートクレーブ養生において、前
記所定の高温度、所定の高圧力下での養生後、炉内を大
気圧よりも低い圧力まで減圧して前記パネルの温度およ
び炉内の温度を降温させることを特徴とするものであ
る。The method of lowering the temperature in the autoclave curing according to the present invention, after storing the lightweight foam concrete master in the furnace,
In an autoclave curing in which a lightweight cellular concrete panel is manufactured by supplying steam into a furnace and curing the original plate at a predetermined high temperature and a predetermined high pressure, the predetermined high temperature and a predetermined high pressure are applied. After curing, the inside of the furnace is depressurized to a pressure lower than the atmospheric pressure to lower the temperature of the panel and the temperature of the inside of the furnace.
炉内を大気圧よりも低い圧力まで減圧すると、炉内温
度が100℃以下でもパネルからの水分の蒸発が行われ、
これにより、パネルの温度、炉内の温度は気化熱により
降温するとともに、パネルからの水分の除去が確実に行
われる。大気圧以下まで減圧する速度およびその減圧量
を適宜調整すれば、適切な降温速度を得られる。When the pressure inside the furnace is reduced to a pressure lower than the atmospheric pressure, moisture is evaporated from the panel even when the temperature inside the furnace is 100 ° C or less.
As a result, the temperature of the panel and the temperature in the furnace are reduced by the heat of vaporization, and the removal of moisture from the panel is reliably performed. By appropriately adjusting the speed at which the pressure is reduced to the atmospheric pressure or less and the amount of the pressure reduction, an appropriate temperature decreasing speed can be obtained.
以下に本発明の一実施例を第１図及び第２図に基づい
て説明する。以下の説明では既に説明した部材と同じ部
材には同一符号を付す。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the following description, the same members as those already described are denoted by the same reference numerals.
本実施例に係る方法は、炉３内で軽量気泡コンクリー
ト製原版１を所定の高温度、所定の高圧力でオートクレ
ーブ養生して原版１を軽量気泡コンクリート製パネル
１′とするところまでは従来方法と同じである。すなわ
ち、型枠から脱型して得られた多数の軽量気泡コンクリ
ート製原版１は台車２に載せられて炉３内に収納され、
炉３内にスチームが供給されることにより、炉３内は所
定の高温度、所定の高圧力となり、原版１の養生が行わ
れる。The method according to the present embodiment is based on the conventional method up to the point where the lightweight foam concrete master 1 is autoclaved in the furnace 3 at a predetermined high temperature and a predetermined high pressure to make the master 1 into a lightweight foam concrete panel 1 ′. Is the same as That is, a large number of lightweight foam concrete original plates 1 obtained by removing the mold from the mold are placed on a truck 2 and stored in a furnace 3,
When the steam is supplied into the furnace 3, the inside of the furnace 3 has a predetermined high temperature and a predetermined high pressure, and the original 1 is cured.
第２図のt1は所定時間に亘る養生が終了したときであ
り、この時、炉３内へのスチームの供給は停止される。
第２図中、Ａは炉３内の温度の変化を示し、この温度t1
のとき前記所定の温度T1となっているが、この温度は、
t1以後、炉３からの自然放熱により自然に下がる。T 1 of FIG. 2 is a time when you finished curing over a predetermined time, this time, the supply of steam into the furnace 3 is stopped.
In FIG. 2, A indicates a change in the temperature in the furnace 3, and this temperature t 1
At this time, the predetermined temperature T 1 is reached, but this temperature is
t 1 after drops in nature by natural radiation of heat from the furnace 3.
炉３内の温度がT1になったとき、即ちt2のとき、第１
図の通り炉３に接続された吸引管４により真空ポンプで
炉３内を吸気する。この吸気はt3まで行い、炉３内の圧
力を大気圧よりも低い圧力まで、例えば（0.1気圧）ま
で減圧する。この減圧によりパネル１′内の水分が水蒸
気になることが促進され、水分が水蒸気になるときの気
化熱によりパネル１′の温度は第２図のＢのように下が
り、また炉３内の温度も下がる。When the temperature in the furnace 3 becomes T 1, that is, when the t 2, the first
As shown in the figure, the inside of the furnace 3 is suctioned by a vacuum pump through a suction pipe 4 connected to the furnace 3. The intake is continued until t 3, the pressure in the furnace 3 to a pressure lower than the atmospheric pressure, depressurized to example (0.1 atm). The reduced pressure promotes the moisture in the panel 1 'to become steam, and the heat of vaporization when the moisture becomes steam lowers the temperature of the panel 1' as shown in FIG. Goes down.
このように炉３内の圧力を大気圧よりも低い圧力まで
減圧することによりパネル１′からの水分の除去を有効
に行なえる。特に、炉３内の温度が100℃以下（すなわ
ち１気圧のもとでは水分が蒸発しない温度）になってい
ても、水分の蒸発が行われるため、パネル１′からの水
分の取り除きを有効に行なえ、パネル１′の含水率は低
下する。As described above, by reducing the pressure in the furnace 3 to a pressure lower than the atmospheric pressure, moisture can be effectively removed from the panel 1 '. In particular, even when the temperature in the furnace 3 is 100 ° C. or less (that is, a temperature at which moisture does not evaporate under 1 atm), since moisture is evaporated, it is possible to effectively remove moisture from the panel 1 ′. As a result, the moisture content of panel 1 'decreases.
t3まで炉３内の圧力を減圧したのち、炉３内に空気を
供給し、これにより炉３内の圧力を次第に大気圧まで戻
す。炉３内の温度が自然放熱により炉３の扉をあけるこ
とができる温度まで低下した後、この扉をあけ、台車２
の引き出しによりパネル１′を炉３内から取り出す。After reducing the pressure in the furnace 3 until t3, air is supplied into the furnace 3, whereby the pressure in the furnace 3 is gradually returned to the atmospheric pressure. After the temperature in the furnace 3 has decreased to a temperature at which the door of the furnace 3 can be opened by natural heat radiation, the door is opened and the bogie 2 is opened.
The panel 1 'is taken out of the furnace 3 by pulling out.
以上説明したように本実施例では、従来方法と異な
り、給水管により炉３内に散水しないため、パネル１′
の表面に水滴が付着することがなく、かつ、無駄な水を
炉３内に供給することも不要となる。また、炉３内の圧
力を大気圧よりも低い圧力まで減圧するため、パネル
１′内の水分の除去が100℃以下でも有効に行われ、こ
れによりパネル１′の含水率を低下させることができ
る。このためオートクレーブ養生工程の後に行う乾燥工
程の作業時間の短縮、作業の簡略化を実現できるように
なる。As described above, in the present embodiment, unlike the conventional method, since water is not sprinkled into the furnace 3 by the water supply pipe, the panel 1 '
There is no need for water drops to adhere to the surface of the furnace 3 and no need to supply waste water into the furnace 3. Further, since the pressure in the furnace 3 is reduced to a pressure lower than the atmospheric pressure, the water in the panel 1 'can be effectively removed even at a temperature of 100 ° C. or less, thereby reducing the water content of the panel 1'. it can. For this reason, it is possible to shorten the operation time of the drying step performed after the autoclave curing step and to simplify the operation.
さらに、炉３内の温度が100℃以上のときに炉３内を
吸引管４で吸気して大気圧よりも低い圧力まで減圧すれ
ば、高温のスチームを回収でき、この熱を次のオートク
レーブ養生の時に再利用することも可能になる。Furthermore, when the temperature inside the furnace 3 is 100 ° C. or higher, if the inside of the furnace 3 is sucked through the suction pipe 4 and reduced in pressure to a pressure lower than the atmospheric pressure, high-temperature steam can be recovered, and this heat is recovered in the next autoclave curing At the time of re-use.
炉３内の圧力を大気圧よりも低い圧力まで減圧する速
度及びその減圧量は任意に決定でき、これらを調整する
ことにより、パネル１′の成分材料等の条件と適合した
降温速度でパネルの温度、炉３内の温度を下げることが
できる。The rate at which the pressure in the furnace 3 is reduced to a pressure lower than the atmospheric pressure and the amount of the pressure reduction can be arbitrarily determined, and by adjusting these, the temperature of the panel can be reduced at a rate suitable for the temperature of the panel 1 '. The temperature and the temperature in the furnace 3 can be reduced.
なお、前記実施例では所定の高温度、所定の高圧力下
でのオートクレーブ養生が終了したt1の後のt2から炉３
内の圧力を減圧したが、t1のときから減圧を開始しても
よい。また、減圧を１回だけではなく２回以上行っても
よい。The predetermined high temperature in the embodiment, the furnace 3 from t 2 after t 1 to autoclave curing is completed under a predetermined high pressure
Although the pressure of the inner pressure was reduced, it may be started under reduced pressure from the time of t 1. Further, the pressure may be reduced not only once but also twice or more.
〔発明の効果〕 本発明によれば、炉内の圧力を大気圧より低い圧力ま
で減圧したため、炉内の温度が100℃以下になってもパ
ネルからの水分の除去を有効に行え、しかも、適切な降
温速度を得られ、また、炉内に給水管で水を供給しない
ため、パネルの表面に水滴が付着することがなく、無駄
な水を炉内に供給することも不要になる。[Effects of the Invention] According to the present invention, since the pressure in the furnace is reduced to a pressure lower than the atmospheric pressure, even when the temperature in the furnace becomes 100 ° C or less, moisture can be effectively removed from the panel, and Since an appropriate cooling rate can be obtained and water is not supplied into the furnace by a water supply pipe, water droplets do not adhere to the surface of the panel, and it becomes unnecessary to supply waste water into the furnace.
第１図は本発明の一実施例が適用される炉を示す断面
図、第２図はその一実施例を示す時間に対する温度変化
のグラフ、第３図は従来方法を示す第１図と同様の図で
ある。 １……軽量気泡コンクリート製原版、１′……軽量気泡
コンクリート製パネル、２……台車、３……炉、４……
吸引管。FIG. 1 is a sectional view showing a furnace to which one embodiment of the present invention is applied, FIG. 2 is a graph showing a temperature change with respect to time showing one embodiment, and FIG. 3 is the same as FIG. 1 showing a conventional method. FIG. 1 ... Lightweight cellular concrete master plate, 1 '... Lightweight cellular concrete panel, 2 ... Dolly, 3 ... Furnace, 4 ...
Suction tube.
Claims (1)
した後、炉内にスチームを供給して所定の高温後、所定
の高圧力下で前記原版を養生することにより軽量気泡コ
ンクリート製パネルを製造するオートクレーブ養生にお
いて、前記所定の高温後、所定の高圧力下での養生後、
炉内を大気圧よりも低い圧力まで減圧して前記パネルの
温度および炉内の温度を降温させることを特徴とするオ
ートクレーブ養生における降温方法。After a lightweight foam concrete master is placed in a furnace, steam is supplied into the furnace, and after curing at a predetermined high temperature and a predetermined high pressure, the lightweight foam concrete panel is cured. In the autoclave curing to be manufactured, after the predetermined high temperature, after curing under a predetermined high pressure,
A method for lowering the temperature in an autoclave curing, comprising reducing the temperature of the panel and the temperature in the furnace by reducing the pressure in the furnace to a pressure lower than the atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7597290A JP2883150B2 (en) | 1990-03-26 | 1990-03-26 | Cooling method in autoclave curing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7597290A JP2883150B2 (en) | 1990-03-26 | 1990-03-26 | Cooling method in autoclave curing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03275306A JPH03275306A (en) | 1991-12-06 |
| JP2883150B2 true JP2883150B2 (en) | 1999-04-19 |
Family
ID=13591664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7597290A Expired - Lifetime JP2883150B2 (en) | 1990-03-26 | 1990-03-26 | Cooling method in autoclave curing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2883150B2 (en) |
-
1990
- 1990-03-26 JP JP7597290A patent/JP2883150B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03275306A (en) | 1991-12-06 |
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