JP3880713B2 - Autoclave curing method - Google Patents
Autoclave curing method Download PDFInfo
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- JP3880713B2 JP3880713B2 JP32182997A JP32182997A JP3880713B2 JP 3880713 B2 JP3880713 B2 JP 3880713B2 JP 32182997 A JP32182997 A JP 32182997A JP 32182997 A JP32182997 A JP 32182997A JP 3880713 B2 JP3880713 B2 JP 3880713B2
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- plate
- loading block
- inorganic
- porous body
- autoclave
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- 238000001723 curing Methods 0.000 title claims description 27
- 238000011068 loading method Methods 0.000 claims description 33
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
- 239000010935 stainless steel Substances 0.000 claims description 17
- 239000004568 cement Substances 0.000 description 13
- 230000003014 reinforcing effect Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/04—Preventing evaporation of the mixing water
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】
【発明の属する技術分野】
この発明は、オートクレーブ養生方法に関するものである。さらに詳しくは、この発明は、無機質板の含水率を均一化し、クラックや反りの発生を防止することのできるオートクレーブ養生方法に関するものである。
【０００２】
【従来の技術】
従来より、住宅等の内外壁材、天井材、屋根材などに用いられるセメント板等の無機質板は、製造プロセスにおいてその複数枚がパレットに積載され、積載ブロック毎にオートクレーブ装置内に導入されて高圧水蒸気養生されている。高圧水蒸気養生を終了する際には、オートクレーブ装置内を高圧から大気圧にまで減圧するが、この時、無機質板の内部から水分が蒸発し、これにより板温度が低下すると同時に、含水率の低下も起こる。特にパレット最上下段に配置される無機質板の水分蒸発量は、オートクレーブ装置の内壁からの輻射熱などの影響を受け、積載ブロックの中段に位置する無機質板のそれより多く、無機質板間の含水率差が大きくなっている。この含水率差は、最上下段に位置する一枚の無機質板についてもその端部と芯部でも同様に生じている。すなわち、端部の水分蒸発量は、芯部よりも多くなっている。このため、パレット最上下段に配置される無機質板やその端部にはクラックや反りが発生しやすい。
【０００３】
このような積載ブロックにおける部位及び無機質板の部位による含水率差の問題を解消するために、従来では、たとえば、減圧速度を遅くする、又は積載ブロック最上段にステンレス板を載せるなどの対策が採られている。
【０００４】
【発明が解決しようとする課題】
しかしながら、これらの減圧速度制御や積載ブロック最上段へのステンレス板の配置によって積載ブロックの無機質板に発生する上記含水率差を十分に解消するまでには至っていないのが現状である。
この発明は、以上の通りの事情に鑑みてなされたものであり、オートクレーブ養生時に無機質板に起こる含水率差を問題のないレベルにまで低減し、含水率の均一化を図り、クラック及び反りの発生を防止することのできる、改善されたオートクレーブ養生方法を提供することを目的としている。
【０００５】
【課題を解決するための手段】
この発明は、上記の課題を解決するものとして、無機質板をパレットに複数枚積載し、積載ブロック毎にオートクレーブ装置内に導入して高圧水蒸気養生するにあたって、積載ブロックの露出面部の少なくとも一面に、多孔質体の表面に取り付けられたステンレス板を対峙させ、ステンレス板が対峙する積載ブロックの露出面部の少なくとも一面を多孔質体で覆って高圧水蒸気養生することを特徴とするオートクレーブ養生方法を提供する。
【０００６】
【発明の実施の形態】
以下、この発明のオートクレーブ養生方法についてさらに詳しく説明する。
セメント板等の無機質板の製造プロセスにおいては、高圧水蒸気養生する際に、たとえば図１に示したように、無機質板（１）は、パレット（２）上に複数枚積載され、積載ブロック毎にオートクレーブ装置（３）内に導入される。
【０００７】
この発明のオートクレーブ養生方法では、従来しばしば発生していた積載ブロック最上下段部と中段の間の含水率差、及び最上下段の無機質板の端部と芯部の間の含水率差を防止するために、図１の右側に示したように、積載ブロックの露出面部をステンレス板（４）を取り付けた多孔質体（５）で覆い、ステンレス板（４）を積載ブロックの露出面部に対峙させる。
【０００８】
なお、本発明の図１においては、無機質板（１）の積載ブロックの表面露出面部をステンレス板（４）を取り付けた多孔質体（５）で覆った実施例を例示したが、無機質板（１）の積載ブロックの側面露出面部をステンレス板（４）を取り付けた多孔質体（５）で覆ってもよいし、無機質板（１）の積載ブロックの表面露出面部および側面露出面部の、所謂、露出面部全面をステンレス板（４）を取り付けた多孔質体（５）で覆ってもよい。
【０００９】
もちろん、無機質板（１）の露出面部全面をステンレス板（４）を取り付けた多孔質体（５）で覆って高圧水蒸気養生すれば含水率の均一化が最も精度よく行えるので最適であるが、前記図１の実施例のように少なくとも無機質板（１）の積載ブロックの表面露出面部をステンレス板（４）を取り付けた多孔質体（５）で覆って高圧水蒸気養生するだけでも含水率の均一化効果は顕著に発揮される。
【００１０】
なお、図１において無機質板（１）の積載ブロックは、収納マガジン（６）に収納され、オートクレーブ装置（３）内で積載時より９０°回転された状態で配置されている。
このように、オートクレーブ装置（３）内で高圧水蒸気養生する際に、積層ブロックと対峙させてステンレス板（４）を取り付けた多孔質体（５）で積載ブロックの露出面部の少なくとも一面を覆うことにより、積載ブロックにおける複数枚の無機質板の含水率を均一化することができる。
【００１１】
すなわち、オートクレーブ装置（３）内を高圧蒸気で所定の圧力まで昇圧すると、多孔質体（５）の表面で凝結水が発生し、これが多孔質体（５）に吸収される。高圧水蒸気養生を終了するにあたって高圧から大気圧にまで減圧すると、そのようにして多孔質体（５）に吸収された凝結水は蒸発するため、多孔質体（５）は無機質板（１）と同様に温度が低下する。これによって、多孔質体（５）で覆われた無機質板（１）には、熱伝導やオートクレーブ装置（３）の内壁からの輻射熱などの熱影響が解消される。積載ブロックにおける無機質板（１）の最上下段と中段の間、また、最上下段の無機質板（１）の端部と芯部の間の水分蒸発量が一定となり、含水率差が許容範囲にまで低減される。
【００１２】
多孔質体（５）に吸収された凝結水は重力の影響で下方に蓄積されるが、ステンレス板（４）は、この凝結水が無機質板（１）に吸収されるのを防止する。積載ブロックにおける無機質板（１）の最上下段と中段の間、また、最上下段の無機質板（１）の端部と芯部の間の含水率差はより一層低減される。
これらの結果、無機質板（１）の含水率は均一化され、積載ブロックの最上下段に位置する無機質板（１）にクラックや反りが発生しにくくなる。
【００１３】
多孔質体（５）はその素材に特別な制限はない。吸水性を有し、耐熱性、耐久性等を備えていればよい。たとえば、金属、セラミックス、耐熱樹脂等が例示される。ステンレス板（４）は、特性、価格等において同等とみなされ、使用可能であれば、他の素材のものに置き換えることができる。
【００１４】
【実施例】
積載ブロックの最上段に位置するセメントパルプ補強板の上にステンレス板（厚さ0.8mm ）を取り付けたポリフェニレンサルファイド繊維のフェルト（比重0.3 、厚さ12mm）（実施例１）および無機質板（厚さ15mm）（実施例２）をそれぞれ多孔質体として配置し、最上段のセメントパルプ補強板の全面を覆った。セメントパルプ補強板にはステンレス板を対峙させた。
【００１５】
オートクレーブ装置内におけるセメントパルプ補強板のパレット積載状態は、図１に示した通りとし、１つのパレット（２）につきセメントパルプ補強板を80枚積載し、これを収納マガジン（６）に収納した後に90°回転した状態とした。そして、図２に示した養生条件でセメントパルプ補強板を高圧水蒸気養生した。
【００１６】
比較のために、最上段のセメントパルプ補強板をステンレス板及び多孔質体で覆わずに、図１の左側に示した状態でオートクレーブ装置（３）内に配置し、同様な条件で高圧水蒸気養生した（比較例１）。また、実施例１と同様のポリフェニレンサルファイド繊維のフェルト（比重0.3 、厚さ12mm）のみを最上段のセメントパルプ補強板上に配置して同様な条件で高圧水蒸気養生した（比較例２）。
【００１７】
養生終了後、積載ブロック最上段のセメントパルプ補強板と下から40枚目（中段）のセメントパルプ補強板の含水率を測定した。また、積載ブロック最上段のセメントパルプ補強板については含水率の分布も調べた。その結果を示したのが表１である。なお、含水率は、105 ℃乾燥をベースにした。
【００１８】
【表１】
この表１から明らかなように、積載ブロック最上段の無機質板表面をステンレス板及び多孔質体で覆うことにより、積載ブロックの最上段と中段での無機質板の含水率が低減され、また、最上段の無機質板における含水率差も低減される。クラックや反りが防止可能となる。ステンレス板の併用は、積載ブロック最上段に位置する無機質板の含水率分布をより一層均一化する。
【００２０】
もちろんこの発明は、以上の実施形態によって限定されるものではない。無機質板及び多孔質体の素材、オートクレーブ養生条件等の細部については様々な態様が可能であることは言うまでもない。
【００２１】
【発明の効果】
以上詳しく説明した通り、この発明によって、オートクレーブ養生時の無機質板の含水率が均一化され、クラック及び反りの発生が防止可能となる。
【図面の簡単な説明】
【図１】この発明のオートクレーブ養生方法を例示した断面図である。
【図２】オートクレーブ時の時間−圧力の経過を示したグラフである。
【符号の説明】
１ 無機質板
２ パレット
３ オートクレーブ装置
４ ステンレス板
５ 多孔質体
６ 収納マガジン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an autoclave curing method. More specifically, the present invention relates to an autoclave curing method capable of making the moisture content of an inorganic plate uniform and preventing the occurrence of cracks and warpage.
[0002]
[Prior art]
Conventionally, a plurality of inorganic boards such as cement boards used for interior and exterior wall materials, ceiling materials, roofing materials, etc. of houses are loaded on a pallet in the manufacturing process and introduced into the autoclave device for each loading block. High pressure steam curing. When the high-pressure steam curing is finished, the inside of the autoclave is reduced from high pressure to atmospheric pressure. At this time, moisture evaporates from the inside of the inorganic plate, thereby lowering the plate temperature and reducing the moisture content. Also happens. In particular, the amount of water vaporization of the inorganic plate placed at the top bottom of the pallet is affected by the radiant heat from the inner wall of the autoclave device, which is greater than that of the inorganic plate located in the middle stage of the loading block. Is getting bigger. This difference in moisture content also occurs in the end portion and the core portion of the single inorganic plate located in the uppermost stage. That is, the water evaporation amount at the end is larger than that of the core. For this reason, cracks and warpage are likely to occur in the inorganic plate arranged at the uppermost pallet and its end.
[0003]
In order to solve the problem of the difference in moisture content due to the part of the loading block and the part of the inorganic plate, conventionally, for example, measures such as slowing down the pressure reduction or placing a stainless steel plate on the uppermost stage of the loading block are taken. It has been.
[0004]
[Problems to be solved by the invention]
However, the present situation is that the above-described difference in water content generated in the inorganic plate of the loading block has not been sufficiently eliminated by the pressure reduction speed control and the arrangement of the stainless plate on the uppermost stage of the loading block.
This invention has been made in view of the circumstances as described above, reduces the moisture content difference that occurs in the inorganic plate during autoclave curing to a level that does not cause problems, and achieves a uniform moisture content, cracking and warping. It aims at providing the improved autoclave curing method which can prevent generation | occurrence | production.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention loads a plurality of inorganic plates on a pallet and introduces them into an autoclave device for each loading block to perform high pressure steam curing, on at least one surface of the exposed surface portion of the loading block , Provided is an autoclave curing method characterized by facing a stainless plate attached to the surface of a porous body, covering at least one surface of the exposed surface of the loading block facing the stainless plate with a porous body, and performing high-pressure steam curing .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the autoclave curing method of the present invention will be described in more detail.
In the manufacturing process of an inorganic board such as a cement board, when performing high-pressure steam curing, for example, as shown in FIG. 1, a plurality of inorganic boards (1) are loaded on the pallet (2), and are loaded for each loading block. It is introduced into the autoclave device (3).
[0007]
In the autoclave curing method of the present invention, in order to prevent the moisture content difference between the lowermost step portion and the middle portion of the loading block and the moisture content difference between the end portion and the core portion of the inorganic plate at the lowermost step, which are often generated conventionally. , as shown on the right side of FIG. 1, not covered by the porous body of exposure surface mounted stainless plate (4) of the stacking blocks (5), a stainless steel plate (4) on the exposed surface of the loading block Make them confront .
[0008]
In addition, in FIG. 1 of this invention, although the Example which covered the surface exposed surface part of the loading block of an inorganic board (1) with the porous body (5) which attached the stainless steel board (4) was illustrated, the inorganic board ( The side exposed surface portion of the loading block of 1) may be covered with a porous body (5) attached with a stainless steel plate (4), or the so-called surface exposed surface portion and side surface exposed surface portion of the loading block of the inorganic plate (1). The entire exposed surface portion may be covered with a porous body (5) attached with a stainless steel plate (4).
[0009]
Of course, if the high-pressure steam curing is performed by covering the entire exposed surface of the inorganic plate (1) with a porous body (5) attached with a stainless steel plate (4), it is optimal because the moisture content can be made most accurate. As in the embodiment of FIG. 1, at least the surface exposed surface portion of the loading block of the inorganic plate (1) is covered with the porous body (5) to which the stainless plate (4) is attached, and the moisture content is uniform even by high-pressure steam curing. The crystallization effect is remarkably exhibited.
[0010]
In FIG. 1, the stacking block of the inorganic plate (1) is stored in the storage magazine (6), and is placed in the autoclave device (3) in a state rotated by 90 ° from the time of loading.
As described above, when high-pressure steam curing is performed in the autoclave device (3), at least one surface of the exposed surface portion of the loading block is covered with the porous body (5) attached with the stainless steel plate (4) so as to face the laminated block. Thus, the moisture content of the plurality of inorganic plates in the loading block can be made uniform.
[0011]
That is, when the inside of the autoclave device (3) is pressurized to a predetermined pressure with high-pressure steam, condensed water is generated on the surface of the porous body (5), and this is absorbed by the porous body (5). When the pressure is reduced from high pressure to atmospheric pressure at the end of the high-pressure steam curing, the condensed water absorbed in the porous body (5) evaporates, so the porous body (5) is the inorganic plate (1). Similarly, the temperature decreases. As a result, thermal effects such as heat conduction and radiant heat from the inner wall of the autoclave device (3) are eliminated from the inorganic plate (1) covered with the porous body (5). The moisture evaporation between the bottom and middle stages of the inorganic board (1) in the loading block and between the end and the core of the bottom inorganic board (1) is constant, and the moisture content difference is within the allowable range. Reduced.
[0012]
The condensed water absorbed in the porous body (5) is accumulated downward due to the influence of gravity, but the stainless steel plate (4) prevents the condensed water from being absorbed by the inorganic plate (1). The difference in moisture content between the lowermost and middle stages of the inorganic plate (1) in the loading block and between the end portion and the core of the lowermost inorganic plate (1) is further reduced.
As a result, the moisture content of the inorganic plate (1) is made uniform, and cracks and warpage are less likely to occur in the inorganic plate (1) located at the uppermost lower stage of the loading block.
[0013]
There are no particular restrictions on the material of the porous body (5). What is necessary is just to have water absorption and to have heat resistance, durability, etc. For example, a metal, ceramics, heat resistant resin, etc. are illustrated. The stainless steel plate (4) is regarded as equivalent in terms of characteristics, price, etc., and can be replaced with another material if it can be used.
[0014]
【Example】
Felt of polyphenylene sulfide fiber (specific gravity 0.3, thickness 12mm) (Example 1) and inorganic plate (thickness) with a stainless steel plate (thickness 0.8mm) attached on the cement pulp reinforcement plate located at the top of the loading block 15 mm) (Example 2) was disposed as a porous body, and the entire surface of the uppermost cement pulp reinforcing plate was covered. A stainless steel plate was opposed to the cement pulp reinforcing plate.
[0015]
The pallet loading state of the cement pulp reinforcing plate in the autoclave apparatus is as shown in FIG. 1, and after 80 cement pulp reinforcing plates are loaded per pallet (2) and stored in the storage magazine (6). The state was rotated 90 °. Then, the cement pulp reinforcing plate was subjected to high pressure steam curing under the curing conditions shown in FIG.
[0016]
For comparison, the uppermost cement pulp reinforcing plate is not covered with a stainless steel plate and a porous body, and is placed in the autoclave apparatus (3) in the state shown on the left side of FIG. (Comparative Example 1). Further, only the same polyphenylene sulfide fiber felt (specific gravity 0.3,
[0017]
After curing, the moisture content of the cement pulp reinforcing plate at the top of the loading block and the 40th (middle) cement pulp reinforcing plate from the bottom were measured. The moisture content distribution of the cement pulp reinforcement plate at the top of the loading block was also examined. The results are shown in Table 1. The water content was based on drying at 105 ° C.
[0018]
[Table 1]
As apparent from Table 1, the moisture content of the inorganic plate at the uppermost and middle stages of the loading block is reduced by covering the surface of the inorganic board at the uppermost stage of the loading block with a stainless steel plate and a porous body. The moisture content difference in the upper inorganic plate is also reduced. Cracks and warpage can be prevented. The combined use of the stainless steel plate makes the moisture content distribution of the inorganic plate located at the uppermost stage of the loading block even more uniform.
[0020]
Of course, the present invention is not limited to the above embodiment. It goes without saying that various modes are possible for details such as the inorganic plate and the porous material, and the autoclave curing conditions.
[0021]
【The invention's effect】
As described above in detail, according to the present invention, the moisture content of the inorganic plate during autoclave curing is made uniform, and generation of cracks and warpage can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating an autoclave curing method of the present invention.
FIG. 2 is a graph showing the progress of time-pressure during autoclaving.
[Explanation of symbols]
DESCRIPTION OF
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32182997A JP3880713B2 (en) | 1997-11-25 | 1997-11-25 | Autoclave curing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32182997A JP3880713B2 (en) | 1997-11-25 | 1997-11-25 | Autoclave curing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11157958A JPH11157958A (en) | 1999-06-15 |
| JP3880713B2 true JP3880713B2 (en) | 2007-02-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32182997A Expired - Fee Related JP3880713B2 (en) | 1997-11-25 | 1997-11-25 | Autoclave curing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3880713B2 (en) |
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- 1997-11-25 JP JP32182997A patent/JP3880713B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11157958A (en) | 1999-06-15 |
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