JP2914415B2 - Manufacturing method of vacuum insulation wall - Google Patents
Manufacturing method of vacuum insulation wallInfo
- Publication number
- JP2914415B2 JP2914415B2 JP4301809A JP30180992A JP2914415B2 JP 2914415 B2 JP2914415 B2 JP 2914415B2 JP 4301809 A JP4301809 A JP 4301809A JP 30180992 A JP30180992 A JP 30180992A JP 2914415 B2 JP2914415 B2 JP 2914415B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- heat insulating
- insulating wall
- rock wool
- density
- 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 - Fee Related
Links
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- Thermal Insulation (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は真空断熱体の製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a vacuum insulator.
【０００２】[0002]
【従来の技術】従来熱処理用ベーキング炉などの高次の
断熱を行う断熱壁の構造として、内外壁よりなる断熱壁
内を密閉空間とし内部に無機質発泡粉末を高密充填しさ
らに真空化してなる断熱壁が知られている（例えば特公
昭60−8399号公報) 。この種断熱壁は内部の真空化され
た雰囲気と高密充填された無機質発泡粉末の断熱効果と
の相乗により高次の断熱効果が得られ、例えば厚さ４〜
５cm程度の厚さの壁体で常温と 300〜400 ℃の温度差の
断熱が可能とされている。2. Description of the Related Art Conventionally, as a structure of a heat insulating wall such as a baking furnace for heat treatment which performs high-order heat insulating, a heat insulating wall consisting of an inner and an outer wall is made into a closed space, and the inside is densely filled with an inorganic foamed powder and further evacuated. A wall is known (for example, Japanese Patent Publication No. 60-8399). This kind of heat-insulating wall provides a high-order heat-insulating effect by synergy between the inside vacuumed atmosphere and the heat-insulating effect of the highly densely packed inorganic foamed powder.
It is said that a wall with a thickness of about 5 cm can insulate at a temperature difference between room temperature and 300-400 ° C.
【０００３】[0003]
【従来技術の問題点】しかしながら、上記断熱体は、断
熱空間への粉末の高密充填が非常に面倒で、複雑に入り
込む形状の断熱壁の場合上記困難性はさらに顕著とな
り、また高密充填が出来たとしても、真空排気の際粉末
の吸引がどうしても生じ、これを極力少なくするため複
雑なフィルターが必要となるなど種々の問題があった。However, in the above-mentioned heat insulator, it is very troublesome to densely pack the powder into the heat-insulating space. In the case of a heat-insulating wall having a complicated shape, the above-mentioned difficulty becomes more remarkable. Even so, there are various problems such as powder suction being inevitably generated during vacuum evacuation, and a complicated filter is required to minimize this.
【０００４】また、このような問題を解消するため、断
熱空間内に無機繊維よりなるマットを収納しその後真空
排気して密封することも提案されているが（例えば実開
昭62-54396号公報) 、この場合はマットを封入後断熱壁
を真空排気した場合、繊維マットの密度のむらあるいは
密度が小さいと繊維マットの有する圧縮変形性により断
熱壁が内外気圧差に起因して凹入変形することがある問
題があった。In order to solve such a problem, it has been proposed that a mat made of inorganic fibers be housed in a heat insulating space and then evacuated and sealed (for example, Japanese Utility Model Laid-Open No. 62-54396). In this case, when the heat insulating wall is evacuated after the mat is enclosed, if the density of the fiber mat is uneven or the density is low, the heat insulating wall may be concavely deformed due to a difference in pressure between inside and outside due to the compressive deformation property of the fiber mat. There was a problem.
【０００５】[0005]
【発明が解決しようとする課題】この発明は上記問題点
に鑑み、高次の断熱が可能でありしかも製造が容易な断
熱体の製造方法を提供することを目的としてなされたも
のである。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a method of manufacturing a heat insulator which can perform high-order heat insulation and is easy to manufacture.
【０００６】[0006]
【課題を解決するための手段】即ち、この発明の真空断
熱体の製造方法は、加熱により容易にガス化する有機バ
インダーをロックウール繊維に含浸させ、該含浸マット
状体を加圧力２kgf/cm2以上で圧縮し密度0.4〜0.7g/cm3
まで圧密プレスして板状体とし、該板状体を断熱容器の
断熱壁の断熱空間に挿入し、次いで前記断熱壁を前記有
機バインダの分解温度まで空気の存在下で加熱してガス
化し、該ガスを吸引排出後、前記断熱空間内を0.1Torr
以下に真空排気することを特徴とするものである。That is, in the method for producing a vacuum insulator according to the present invention, an organic binder which is easily gasified by heating is impregnated into rock wool fibers, and the impregnated mat is pressed at a pressure of 2 kgf / cm. Compress with 2 or more, density 0.4-0.7g / cm 3
Into a plate, and insert the plate into the heat insulating space of the heat insulating wall of the heat insulating container , and then heat the heat insulating wall to the decomposition temperature of the organic binder in the presence of air. gasified Te, after sucking and discharging the gas, 0.1Tor r the insulation space
Is characterized in that the evacuating to below.
【０００７】[0007]
【作用】この発明において対象となる断熱壁は表裏面が
メンブレンとされ、その間が断熱用密閉空間とされた構
造をなす。そして、断熱のための主構成として上記断熱
壁内にロックウールよりなる断熱材を充填すると共に内
部を真空化した構成とされるが、上記ロックウールより
なる断熱材は充填に先立ち、加熱により容易にガス化す
る有機バインダーで断熱空間に丁度収納できる厚さにま
で、加圧力２kgf/cm2 以上で圧縮し密度が0.4 〜0.7g/c
m3となるようにプレスで圧縮硬化したものが使用され
る。従って断熱空間への収納はあたかも板状体を挿入す
ることとなって挿入が非常に容易となると伴に真空排気
後の変形が小さくなる。According to the present invention, the heat insulating wall has a structure in which the front and back surfaces are membranes and the space between them is a closed space for heat insulation. As a main structure for heat insulation, a heat insulating material made of rock wool is filled in the heat insulating wall and the inside is evacuated. However, the heat insulating material made of rock wool is easily heated by heating before filling. the organic binder to be gasified to a thickness which can be exactly housed in the heat insulation space, pressure 2 kgf / cm compressed density 2 or 0.4 ~0.7g / c
What was compression-hardened with a press so as to obtain m 3 is used. Therefore, the storage in the heat insulating space is as if a plate-like body is inserted, and the insertion becomes very easy, and the deformation after evacuation is reduced.
【０００８】なお、ロックウールよりなる板状体のプレ
ス圧を２kgf/cm2 以上とするのは、後述の圧縮ロックウ
ール繊維の密度を0.4 〜0.7g/cm3とするためであって、
プレス圧が２kgf/cm2 以下であると前記密度とすること
ができない。またこのロックウール繊維の密度を 0.4〜
0.7g/cm3とするのは、本発明者らの実験の結果、最も断
熱効率に優れた範囲とするものであり、図５のグラフよ
り明らかなように0.4g/cm3 より低いとロックウール板
状体の熱伝導率が高く充分な断熱効果が得られず、また
0.7g/cm3より高くしてもやはり熱伝導率が高くなり、充
分な断熱効果が得られないからである。The reason why the pressing pressure of the plate made of rock wool is set to 2 kgf / cm 2 or more is to set the density of the compressed rock wool fibers described later to 0.4 to 0.7 g / cm 3 .
If the pressing pressure is 2 kgf / cm 2 or less, the density cannot be obtained. In addition, the density of this rock wool fiber is 0.4 ~
Lock for a 0.7 g / cm 3, the results of experiments of the present inventors are those in the range with excellent most adiabatic efficiency, lower than 0.4 g / cm 3 As apparent from the graph of FIG. 5 The thermal conductivity of the wool plate does not provide a sufficient heat insulating effect, and
This is because, even if it is higher than 0.7 g / cm 3, the thermal conductivity also increases, and a sufficient heat insulating effect cannot be obtained.
【０００９】そして、断熱壁内の真空化に先立って断熱
壁を加熱処理し、挿入されたロックウールを固めていた
有機バインダーを分解除去させる。この分解除去によっ
て有機バインダーはガスとなって断熱壁外部へ飛散し繊
維間の拘束を解く。しかる後に断熱壁内部を密閉し真空
化すれば、大気圧によるメンブレンの凹入変形は圧縮さ
れて挿入されたロックウール板状体により支えられる。
同時に真空引き作業も内部ロックウール板状体が殆ど固
定された状態であるので吸引排出の恐れはなく容易にか
つ短時間に排気可能となる。またこの時の真空度を0.1T
orr 以下とするのは、空気の介在による輻射伝熱を防止
するためであって、これ以上の真空度とした場合は充分
な断熱効果が得られない。[0009] Prior to the evacuation of the inside of the heat insulating wall, the heat insulating wall is subjected to a heat treatment to decompose and remove the organic binder that has solidified the inserted rock wool. By this decomposition and removal, the organic binder becomes gas and scatters to the outside of the heat insulating wall to release the constraint between the fibers. Thereafter, if the inside of the heat insulating wall is closed and evacuated, the dent deformation of the membrane due to the atmospheric pressure is supported by the rock wool plate inserted and inserted.
At the same time, since the inner rock wool plate is almost fixed in the evacuation work, there is no danger of suction and discharge, and the evacuation can be performed easily and in a short time. Also, the degree of vacuum at this time is 0.1T
The reason for setting it to orr or less is to prevent radiant heat transfer due to the presence of air, and a sufficient heat insulating effect cannot be obtained if the degree of vacuum is higher than this.
【００１０】また有機バインダーは加熱分解され、カー
ボンとして残留することなく大気中に飛散されているの
でこれらによる熱伝導、真空化阻害も生じない。なお、
上記において、加熱により容易にガス化する有機バイン
ダーとしては、例えばフェノール樹脂、フラン樹脂、エ
ポキシ樹脂、あるいはウレタン樹脂などが使用される。The organic binder is decomposed by heating , and
Since they are scattered in the atmosphere without remaining as bon, they do not cause heat conduction or vacuum evacuation. In addition,
In the above description, as the organic binder which is easily gasified by heating, for example, a phenol resin, a furan resin, an epoxy resin, or a urethane resin is used.
【００１１】[0011]
【実施例】次にこの発明の実施例を説明する。図１〜図
４はこの発明の実施工程を示す斜視図及び断面図であ
る。Next, an embodiment of the present invention will be described. 1 to 4 are a perspective view and a sectional view showing an embodiment of the present invention.
【００１２】実施例１〜９ 厚さ0.5 mmのステンレスメンブレンを内外壁１Ａ、１Ｂ
とし、断熱空間の厚さを30mmとした断熱壁１（図２）を
有する容器を用意し、繊維径５μm 〜８μm のロックウ
ールよりなる無加圧状態で分厚い板状体２表裏面に、ロ
ックウール板状体重量 100部に対し10重量部のフェノー
ル樹脂（大日本インキ化学工業株式会社社製商品名ブラ
イオーフェン）をスプレー噴射して含浸させ、これをプ
レス機で1.0 kgf/cm2 以上の圧力でプレスし厚さ３cmと
なるまで加熱しつつ加圧し、フェノール樹脂を硬化させ
て厚さ2.7 〜2.9cm で密度 0.2〜0.81/cm3の９種の圧縮
板状体２Ａ（図１）を成形した。なお、プレス圧と圧縮
板状体の密度との関係は表１の通りであった。Examples 1 to 9 A stainless steel membrane having a thickness of 0.5 mm was applied to inner and outer walls 1A and 1B.
A container having a heat insulating wall 1 (FIG. 2) having a heat insulating space with a thickness of 30 mm is prepared, and a thick plate-like body 2 made of rock wool having a fiber diameter of 5 μm to 8 μm in a non-pressurized state is locked on the front and back surfaces. 10 parts by weight of a phenolic resin (Dai Nippon Ink Chemical Co., Ltd., Bliofen) is sprayed and impregnated with 100 parts by weight per 100 parts of the wool plate to impregnate it with a press machine of 1.0 kgf / cm 2 or more. pressurized while heating until the pressing by 3cm thick pressure, nine compressed shaped body 2A of density .2-.81 / cm 3 with a thickness of 2.7 ～2.9Cm to cure the phenol resin (1) Molded. Table 1 shows the relationship between the pressing pressure and the density of the compressed plate.
【００１３】[0013]
【表１】 [Table 1]
【００１４】次にこの圧縮板状体２Ａを図２に示すよう
に、上端に開口部３を設けた断熱壁１内に挿入し、内部
に密充填の状態とした後開口部３を溶接により密閉し
た。 次に、この容器を図３に示すようにベーキング炉
４へ入れ約 400℃で1.5 時間加熱しフェノール樹脂を燃
焼気化させ、このガスを断熱壁１の吸引口５に予め接続
した排気口６より排出した。次いでガスの排出が殆ど無
くなった時点で弁７を切り換え真空ポンプ８を作動し断
熱壁１内部の真空引きを0.01Torrとなるまで行い、終了
後吸引口５を密閉し図４に示す断熱壁１を有する容器を
得た。Next, as shown in FIG. 2, the compressed plate-like body 2A is inserted into a heat insulating wall 1 provided with an opening 3 at the upper end, and the rear opening 3 which has been tightly filled therein is welded. Sealed. Next, the container is placed in a baking furnace 4 as shown in FIG. 3 and heated at about 400 ° C. for 1.5 hours to burn and vaporize the phenol resin. This gas is discharged from an exhaust port 6 previously connected to a suction port 5 of the heat insulating wall 1. Discharged. Then, when the gas was almost completely discharged, the valve 7 was switched and the vacuum pump 8 was operated to evacuate the inside of the heat insulating wall 1 until the pressure became 0.01 Torr. After the end, the suction port 5 was closed and the heat insulating wall 1 shown in FIG. Was obtained.
【００１５】上記実施例１〜９について、ＡＳＴＭＣ５
１８−８５に準拠して熱伝導率を測定したところ図５の
結果となった。図５より明らかなように、圧力0.01Torr
の真空条件下ではロックウールの圧縮による密度 0.4〜
0.7 g/cm3 の範囲が0.0038〜0.0039 w/mk と最も良い断
熱性を示すことが判明した。For the above Examples 1 to 9, ASTM C5
When the thermal conductivity was measured according to 18-85, the results were as shown in FIG. As is clear from FIG.
Under vacuum conditions, the density of rock wool by compression is 0.4 ~
It was found that the range of 0.7 g / cm 3 showed the best heat insulation, with 0.0038 to 0.0039 w / mk.
【００１６】次に、上記実施例１〜９の断熱壁について
外観を観察したところ、実施例１（ロックウール板状体
の密度0.4g/cm3未満のものは大きな凹入変形が見られた
が、その他は表面の凹入変形は全く生じていなかった
か、断熱壁の厚さの10％以下に止まった。Next, when the appearance of the heat insulating walls of Examples 1 to 9 was observed, Example 1 (a rock wool plate having a density of less than 0.4 g / cm 3 showed large dent deformation. However, in other cases, no dent deformation occurred on the surface, or it was less than 10% of the thickness of the heat insulating wall.
【００１７】[0017]
【発明の効果】以上説明したように、この発明によれ
ば、断熱容器の断熱壁内への断熱材の充填が非常に容易
となり、また充填される断熱材は一旦大気圧で圧縮さ
れ、かつ最も熱伝導率の低い密度となるように圧縮され
たものを使用するから、バインダが飛散しても断熱壁内
部で充分な耐圧力を発揮し、薄いメンブレンよりなる断
熱壁でも凹入変形してしまうのを防止する他、薄い断熱
壁でも充分な断熱性を発揮する効果を有する。また、真
空化する前にバインダーを空気の存在下で加熱分解する
ので断熱性に悪影響を及ぼすカーボンの残留もない。そ
して内部の真空度も容易に達成でき、ロックウールの断
熱性と相俟って、断熱容器のコンパクト化にも寄与し得
るなど種々の効果を有する。As described above, according to the present invention, it becomes very easy to fill the heat insulating material into the heat insulating wall of the heat insulating container , and the heat insulating material to be filled is once compressed at atmospheric pressure, and most from using those heat compressed so that conductivity of the low density, even if bus inductor is scattered exhibit sufficient withstand pressure inside the heat insulating wall, and recessed deformation by heat insulating walls made of thin membranes In addition to preventing heat from being applied, it has the effect of exhibiting sufficient heat insulating properties even with a thin heat insulating wall. Also true
Thermal decomposition of binder in the presence of air before emptying
Therefore, there is no carbon residue that adversely affects the heat insulating property. So
As a result, it is possible to easily achieve the degree of vacuum inside, and to achieve various effects such as contributing to the downsizing of the heat insulating container in combination with the heat insulating property of rock wool.
【図１】この発明の実施例のロックウール板状体の斜視
図である。FIG. 1 is a perspective view of a rock wool plate according to an embodiment of the present invention.
【図２】この発明の実施例の断熱壁を有する容器の断面
図である。FIG. 2 is a sectional view of a container having a heat insulating wall according to the embodiment of the present invention.
【図３】この発明の実施例の容器のベーキングの状態を
示す断面図であるFIG. 3 is a sectional view showing a state of baking of the container according to the embodiment of the present invention.
【図４】この発明の方法で得た断熱容器の断面図であ
る。FIG. 4 is a sectional view of a heat insulating container obtained by the method of the present invention.
【図５】この発明の製造方法で得た真空断熱壁のロック
ウールボードの密度と熱伝導率の関係を示すグラフであ
る。FIG. 5 is a graph showing the relationship between the density of a rock wool board having a vacuum heat insulating wall and the thermal conductivity obtained by the manufacturing method of the present invention.
１ 断熱壁 ２ ロックウール板状体 ２Ａ 圧縮板状体 ３ 開口部 ４ ベーキング炉 ５ 吸引口 ６ 排気口 ７ 弁 ８ 真空ポンプ DESCRIPTION OF SYMBOLS 1 Heat insulation wall 2 Rock wool plate 2A Compression plate 3 Opening 4 Baking furnace 5 Suction port 6 Exhaust port 7 Valve 8 Vacuum pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 越智 正久 兵庫県尼崎市大浜町２丁目26番地 株式 会社クボタ武庫川製造所内 (56)参考文献 特開 昭60−14695（ＪＰ，Ａ) 特開 昭53−2753（ＪＰ，Ａ) 特開 平５−87292（ＪＰ，Ａ) 特開 昭61−241595（ＪＰ，Ａ) 特開 昭55−155996（ＪＰ，Ａ) 特開 平４−224397（ＪＰ，Ａ) 実開 昭60−159295（ＪＰ，Ｕ) 実開 昭62−54396（ＪＰ，Ｕ) 特公 昭60−8399（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) F16L 59/00 - 59/16 F27D 1/00 - 1/18 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masahisa Ochi 2-26-Ohama-cho, Amagasaki City, Hyogo Prefecture Inside Kubota Mukogawa Works Co., Ltd. -2753 (JP, A) JP-A-5-87292 (JP, A) JP-A-61-241595 (JP, A) JP-A-55-155996 (JP, A) JP-A-4-224397 (JP, A) ) Japanese Utility Model Showa 60-159295 (JP, U) Japanese Utility Model Showa 62-54396 (JP, U) Japanese Patent Publication No. 60-8399 (JP, B2) (58) Field surveyed (Int. Cl. 6 , DB name) F16L 59/00-59/16 F27D 1/00-1/18
Claims (1)
ダーをロックウール繊維に含浸させ、該含浸マット状体
を加圧力２kgf/cm2以上で圧縮し密度0.4〜0.7g/cm3まで
圧密プレスして板状体とし、該板状体を断熱容器の断熱
壁の断熱空間に挿入し、次いで前記断熱壁を前記有機バ
インダの分解温度まで空気の存在下で加熱してガス化
し、該ガスを吸引排出後、前記断熱空間内を0.1Torr以
下に真空排気することを特徴とする真空断熱壁の製造方
法。A rock wool fiber is impregnated with an organic binder which is easily gasified by heating, and the impregnated mat body is compressed with a pressing force of 2 kgf / cm 2 or more and pressed to a density of 0.4 to 0.7 g / cm 3. Into a heat-insulating space of the heat-insulating wall of the heat- insulating container , and then heat the heat-insulating wall to the decomposition temperature of the organic binder in the presence of air to gasify the gas, and suck the gas. after discharge, the manufacturing method of the vacuum heat insulating wall, characterized in that to evacuate the insulation space under 0.1Tor r than <br/>.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4301809A JP2914415B2 (en) | 1992-10-13 | 1992-10-13 | Manufacturing method of vacuum insulation wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4301809A JP2914415B2 (en) | 1992-10-13 | 1992-10-13 | Manufacturing method of vacuum insulation wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06129591A JPH06129591A (en) | 1994-05-10 |
| JP2914415B2 true JP2914415B2 (en) | 1999-06-28 |
Family
ID=17901426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4301809A Expired - Fee Related JP2914415B2 (en) | 1992-10-13 | 1992-10-13 | Manufacturing method of vacuum insulation wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2914415B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5049468B2 (en) * | 2005-03-29 | 2012-10-17 | 国立大学法人東北大学 | Insulated container and manufacturing method thereof |
| JP4856385B2 (en) * | 2005-03-29 | 2012-01-18 | 国立大学法人東北大学 | Insulated container and manufacturing method thereof |
| JP4898141B2 (en) * | 2005-05-12 | 2012-03-14 | 旭ファイバーグラス株式会社 | Manufacturing method of vacuum insulation core material |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS532753A (en) * | 1976-06-29 | 1978-01-11 | Mitsubishi Motors Corp | Shaping method of adiabatic material |
| DE2911416A1 (en) * | 1979-03-23 | 1980-09-25 | Erno Raumfahrttechnik Gmbh | ELEMENT FOR HEAT INSULATION |
| JPS608399A (en) * | 1983-06-29 | 1985-01-17 | ライオン株式会社 | Additive for granular detergent |
| JPS6014695A (en) * | 1983-07-06 | 1985-01-25 | 株式会社日立製作所 | Vacuum heat-insulating material |
| JPS60159295U (en) * | 1984-04-02 | 1985-10-23 | 株式会社日立製作所 | vacuum insulation |
| JPS61241595A (en) * | 1985-04-16 | 1986-10-27 | Matsushita Electric Ind Co Ltd | Vacuum heat-insulating structure body |
| JPS6254396U (en) * | 1985-09-25 | 1987-04-04 | ||
| JPH04224397A (en) * | 1990-12-26 | 1992-08-13 | Kubota Corp | Manufacture of powder vacuum heat insulating body |
| JP2914412B2 (en) * | 1991-04-09 | 1999-06-28 | 株式会社クボタ | Manufacturing method of vacuum insulation wall |
-
1992
- 1992-10-13 JP JP4301809A patent/JP2914415B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06129591A (en) | 1994-05-10 |
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