JPH01135317A - Method for manufacturing vacuum double container of metal - Google Patents
Method for manufacturing vacuum double container of metalInfo
- Publication number
- JPH01135317A JPH01135317A JP29450887A JP29450887A JPH01135317A JP H01135317 A JPH01135317 A JP H01135317A JP 29450887 A JP29450887 A JP 29450887A JP 29450887 A JP29450887 A JP 29450887A JP H01135317 A JPH01135317 A JP H01135317A
- Authority
- JP
- Japan
- Prior art keywords
- container
- inner container
- vacuum
- double
- oxide film
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 229910052751 metal Inorganic materials 0.000 title claims description 11
- 239000002184 metal Substances 0.000 title claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 18
- 238000009413 insulation Methods 0.000 abstract 2
- 239000011888 foil Substances 0.000 description 13
- 230000032683 aging Effects 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000005238 degreasing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Thermally Insulated Containers For Foods (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は魔法瓶、ポット、ジャー等の金属製真空二重容
器の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing vacuum double-walled metal containers such as thermos flasks, pots, and jars.
（従来の技術）
金属製真空二重容器の保温性を向上するには、内容器と
外容器の間の真空度を高くすることと、内容器から外容
器へのふく射伝熱を遮断することが重要である。(Prior art) In order to improve the heat retention of a double vacuum metal container, it is necessary to increase the degree of vacuum between the inner container and the outer container, and to block radiation heat transfer from the inner container to the outer container. is important.
真空度を高めるには、真空排気処理能力を高めて高真空
に封止することはもちろんのこと、封止後の内容器外表
面又は外容器内表面からの吸蔵ガスの離脱を防止するこ
とが特に必要である。このため、従来、内容器外表面及
び外容器内表面を脱脂してさらに硝７ツ酸等で酸洗する
方法、排気処理時に炉内で加熱して吸蔵ガスを空気とと
もに排出する方法、ゲッターを用いて金属表面から離脱
する吸蔵ガスを吸着させる方法があるが、通常これらの
方法をすべて使用することが行なわれている。In order to increase the degree of vacuum, it is necessary not only to increase the evacuation processing capacity and seal to a high vacuum, but also to prevent the escape of the occluded gas from the outer surface of the inner container or the inner surface of the outer container after sealing. Especially necessary. For this reason, conventional methods include degreasing the outer surface of the inner container and the inner surface of the outer container and then pickling with nitric acid, etc., heating in a furnace during exhaust treatment to exhaust the occluded gas together with air, and using a getter. There is a method of adsorbing the occluded gas that is released from the metal surface using a metal surface, but all of these methods are generally used.
また、ふく射伝熱を防止する方法として、従来、少なく
とも内容器外表面に電解メツキあるいは銀鏡反応により
メツキ層を形成する方法、又は特開昭６１−３１１１１
号公報に示すように内容器外表面を銅又はアルミニウム
の薄板で覆う方法がある。In addition, as a method for preventing radiation heat transfer, conventional methods include forming a plating layer on at least the outer surface of the inner container by electrolytic plating or silver mirror reaction, or Japanese Patent Application Laid-Open No. 61-31111
As shown in the above publication, there is a method of covering the outer surface of the inner container with a thin plate of copper or aluminum.
（発明が解決しようとする問題点）
しかしながら、前記真空度を維持するための脱脂酸洗方
法は、有毒の洗浄剤を取り扱うため作業が危険であるう
え、高コストとなる。また、加熱排気による方法は、特
に口部の狭い真空二重容器では外容器に比べて内容器の
加熱が遅れるため、内容器外表面中の吸蔵ガスを十分に
脱離排気させようとすれば、長時間加熱排気処理を行な
わなければならない。また、ゲッターを使用する方法は
、効果は完全であるが、ゲッター材料が高価である等の
問題点を有している。(Problems to be Solved by the Invention) However, in the degreasing and pickling method for maintaining the degree of vacuum, the work is dangerous because a toxic cleaning agent is used, and the cost is high. In addition, in the case of a vacuum double-walled container with a narrow opening, heating of the inner container is delayed compared to the outer container, so it is difficult to fully desorb and exhaust the occluded gas on the outer surface of the inner container. , it is necessary to perform heating exhaust treatment for a long time. Furthermore, although the method using a getter is completely effective, it has problems such as the getter material being expensive.
一方、ふく射伝熱を防止するためのメツキ法は、工程が
複雑となり生産性が劣るうえ、高価となる。On the other hand, the plating method for preventing radiation heat transfer requires a complicated process, lowers productivity, and is expensive.
また、内容器を銅等の薄板で覆う方法では、真空排気処
理時あるいはゲッター使用時に内容器外表面より離脱す
る吸蔵ガスが当該薄板に阻止されて排気されなかったり
、ゲッターに吸着されないで薄板と内容器に遊在すると
いう問題点を有している。In addition, in the method of covering the inner container with a thin plate such as copper, the occluded gas that escapes from the outer surface of the inner container during vacuum evacuation processing or when using a getter may be blocked by the thin plate and not exhausted, or may not be absorbed by the getter and be removed from the thin plate. There is a problem in that it is loose in the inner container.
本発明は斯かる問題点に鑑みてなされたもので生産性が
良く、かつ安価に製造でき、しかも保温性に優れた金属
性真空二重容器の製造方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 problems, and an object of the present invention is to provide a method for manufacturing a metallic vacuum double container which has good productivity, can be manufactured at low cost, and has excellent heat retention properties.
（問題点を解決するための手段）
前記問題点を解決するため、本発明は、金属製の内容器
と外容器を口部で接合して二重壁構造を形成し、内容器
の外表面を銅又はアルミニウムの薄板で覆うとともに、
内容器と外容器の間の空間を真空にしてなる金属製真空
二重容器の製造方法において、
内容器の外表面に酸化被膜を形成した後、内容器と外容
器の間の空間を加熱排気処理して真空封止するものであ
る。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention connects an inner container and an outer container made of metal at their mouths to form a double wall structure, so that the outer surface of the inner container covered with a thin plate of copper or aluminum,
In the manufacturing method of a metal vacuum double container in which the space between the inner container and the outer container is evacuated, an oxide film is formed on the outer surface of the inner container, and then the space between the inner container and the outer container is heated and evacuated. It is processed and vacuum sealed.
（作用）
加熱排気処理前に内容器の外表面に酸化被膜を形成する
ために加熱すると、内容器外表面から一部の吸蔵ガスが
離脱するが、−旦酸化被膜が形成されるとその後の吸蔵
ガスの離脱が押さえられる。(Function) When heating is performed to form an oxide film on the outer surface of the inner container before heating and exhaust treatment, some of the stored gas is released from the outer surface of the inner container, but once the oxide film is formed, subsequent The escape of stored gas is suppressed.
この酸化被膜が形成された状態で内容器と外容器の間の
空間を加熱排気すると、内容器外表面は既に酸化被膜が
形成されているため、内容器外表面からの吸蔵ガスの離
脱は極めて少ない。従って、主に外容器内表面の吸蔵ガ
スを離脱させればよいため、加熱処理時間が短くて済む
。If the space between the inner container and the outer container is heated and evacuated with this oxide film formed, the oxide film has already been formed on the outer surface of the inner container, so it is extremely difficult for the stored gas to escape from the outer surface of the inner container. few. Therefore, since it is sufficient to mainly remove the occluded gas from the inner surface of the outer container, the heat treatment time can be shortened.
また、外容器は加熱処理中に内容器に比べて早く加熱さ
れるため、外容器外表面の吸蔵ガスは十分に離脱して排
気されるとともに、外容器内表面に酸化被膜が形成され
る。従って、この加熱排気処理を終えた二重容器の内容
器外表面及び外容器内表面は同程度の酸化被膜が形成さ
れており、真空封止後の吸蔵ガスの脱離はほとんどなく
、当初の真空度が維持される。Further, since the outer container is heated faster than the inner container during the heat treatment, the occluded gas on the outer surface of the outer container is sufficiently released and exhausted, and an oxide film is formed on the inner surface of the outer container. Therefore, the same degree of oxidation film is formed on the outer surface of the inner container and the inner surface of the outer container of the double container after this heating and exhaust treatment, and there is almost no desorption of the stored gas after vacuum sealing, and the original The degree of vacuum is maintained.
さらに、内容器外表面に覆った銅又はアルミニウムの薄
板により、内容器から外容器へのふく射伝熱が遮断され
る。Furthermore, the copper or aluminum thin plate covering the outer surface of the inner container blocks radiation heat transfer from the inner container to the outer container.
（実施例） 次に、本発明の一実施例を添付図面に従って説明する。(Example) Next, one embodiment of the present invention will be described with reference to the accompanying drawings.
第１ａ図〜第１ｅ図は本発明に係る方法による製造工程
の各工程における金属性二重容器を示す。Figures 1a to 1e show a metallic double container at various stages of the manufacturing process according to the method according to the invention.
まず、第１ａ図に示すようにステンレス鋼製の内容器ｌ
を形成し、この内容器ｌを連続炉等により約４５０°Ｃ
で約２０分間加熱して、第１ｂ図に示すように、内容器
ｌの内表面、外表面に酸化被膜Ｍ、、Ｍ、を形成する。First, as shown in Figure 1a, an inner container l made of stainless steel is
This inner container is heated to approximately 450°C in a continuous furnace, etc.
The mixture is heated for about 20 minutes to form oxide films M, , M on the inner and outer surfaces of the inner container 1, as shown in FIG. 1b.
なお、内容器ｌの内表面の酸化被膜Ｍ１は最終的に酸洗
により除去される。Note that the oxide film M1 on the inner surface of the inner container 1 is finally removed by pickling.
そして、第１ｃ図に示すように、この内容器ｌにアルミ
箔２を巻き付けてその外表面を覆う。このとき、後述す
る外容器３のチップ管４と対向する内容器ｌの底外面の
中央部は覆わないで露出させておくとともに、薄板２の
端部と内容器１の間、又はアルミ箔２の重ね合わせ部に
ろう材を挾み込んでおく。Then, as shown in FIG. 1c, aluminum foil 2 is wrapped around this inner container 1 to cover its outer surface. At this time, the central part of the bottom outer surface of the inner container l facing the chip tube 4 of the outer container 3, which will be described later, is left uncovered and exposed, and the area between the end of the thin plate 2 and the inner container 1, or the aluminum foil 2 Sandwich the brazing filler metal between the overlapping parts.
次に、別途上部３ａと下部３ｂの２分割に形成しておい
たステンレス鋼製の外容器３に内容器Ｉを挿入して、第
１ｄ図に示すように、外容器３の上部３ａと下部３ｂを
Ｘｓで接合し、さらに、内容器ｌと外容器上部３ａをＹ
部で接合して、二重壁構造に形成する。そして、真空加
熱炉で加熱しながら内容器ｌと外容器３の間の空間を外
容器３の下部３ｂに設けたチップ管４より排気する。こ
のとき、チップ管４と対向する内容器ｌの底外面はアル
ミ箔２で覆われていないので、排気処理中にアルミ箔２
が吸い上げられることはない。また、加熱排気処理時の
熱により、アルミ箔２と内容器ｌの外面との間、又はア
ルミ箔２の重ね合わせ部に挾み込んだろう材が溶融して
ろう付けされることになるため、アルミ箔２の端部や重
ね合わせ部がはがれることはない。Next, the inner container I is inserted into the stainless steel outer container 3 which has been separately formed into two parts, an upper part 3a and a lower part 3b, and as shown in FIG. 3b is joined with Xs, and the inner container l and outer container upper part 3a are joined with Y.
to form a double wall structure. Then, while heating in a vacuum heating furnace, the space between the inner container 1 and the outer container 3 is evacuated through a chip tube 4 provided in the lower part 3b of the outer container 3. At this time, since the bottom outer surface of the inner container L facing the chip tube 4 is not covered with the aluminum foil 2, the aluminum foil 2 is not covered during the exhaust treatment.
is never absorbed. In addition, due to the heat during the heating and exhaust treatment, the brazing material sandwiched between the aluminum foil 2 and the outer surface of the inner container 1 or in the overlapping portion of the aluminum foil 2 will melt and be brazed. , the ends and overlapping parts of the aluminum foil 2 will not peel off.
この加熱排気処理中において、炉熱を直接受ける外容器
３は内容器２よりも先に温度上昇し、内容器ｌは外容器
３からの熱伝導により外容器３より遅れて温度上昇する
。そして、先に加熱された外容器３の内表面から吸蔵ガ
スが離脱するが、このガスは内容器ｌと外容器３の間の
空間内の空気とともにチップ管４を通して排気される。During this heating and exhausting process, the temperature of the outer container 3, which directly receives the furnace heat, rises earlier than the inner container 2, and the temperature of the inner container 1 rises later than the outer container 3 due to heat conduction from the outer container 3. Then, the stored gas is released from the inner surface of the outer container 3 which has been heated previously, and this gas is exhausted through the tip pipe 4 together with the air in the space between the inner container 1 and the outer container 3.
また、この加熱排気処理により、高温の外容器３の内外
表面に第１ｅ図に示すように酸化被膜Ｍ！、Ｍ、が形成
されるが、この酸化被膜ＭＪ、Ｍ、は、内容器ｌと外容
器３の間の空気が存在するうちに形成され、真空に近付
いて空気が無くなってゆくと形成されなくなる。Moreover, by this heating and exhaust treatment, an oxide film M! is formed on the inner and outer surfaces of the high-temperature outer container 3 as shown in FIG. 1e. . .
一方、外容器３よりも遅れて温度上昇する内容器ｌは、
既に第１ｂ図に示す単品状態において酸化被膜Ｍ！が形
成されているｔ；め、温度上昇する過程で吸蔵ガスが離
脱することはない。従って、吸蔵ガスが離脱するのは外
容器３の内表面のみとなり、加熱排気時間が短縮される
。On the other hand, the temperature of the inner container 1 rises later than that of the outer container 3,
The oxide film M! is already present in the single product state shown in FIG. 1b! is formed, so that the stored gas will not be released during the temperature rising process. Therefore, the stored gas is released only from the inner surface of the outer container 3, and the heating exhaust time is shortened.
吸蔵ガス及び空気が排気されて、内容器１と外容器３の
間の空間が所定の真空度に達した後、チップ管４を挾み
切って封止し、放冷する。After the stored gas and air are exhausted and the space between the inner container 1 and the outer container 3 reaches a predetermined degree of vacuum, the chip tube 4 is pinched and sealed, and left to cool.
以上のようにして製造された真空二重容器の内容器ｌの
外表面には単品状態で酸化被膜Ｍ２が形成され、また外
容器３の内表面には加熱排気処理時の熱を直接受けて酸
化被膜Ｍ、が形成されているｔ；め、内容器ｌの外表面
及び外容器３の内表面に残留した吸蔵ガスが離脱するこ
とはなく、内容器ｌと外容器３の間の空間の真空度が維
持される。An oxide film M2 is formed on the outer surface of the inner container l of the vacuum double container manufactured as described above in a single product state, and the inner surface of the outer container 3 is directly exposed to the heat during the heating and exhaust treatment. Since the oxide film M is formed, the stored gas remaining on the outer surface of the inner container L and the inner surface of the outer container 3 does not escape, and the space between the inner container L and the outer container 3 is The degree of vacuum is maintained.
また、内容器ｌの外表面を覆うアルミ箔２により内容器
ｌから外容器３へのふく射熱が遮断され、保温性が良く
なる。Furthermore, the aluminum foil 2 covering the outer surface of the inner container 1 blocks radiant heat from the inner container 1 to the outer container 3, improving heat retention.
本発明者らは、本発明に係る方法により製造し１こステ
ンレス鋼製真空二重容器の保温性を確認するためのテス
トを行なった。The present inventors conducted a test to confirm the heat retention properties of a single stainless steel vacuum double container manufactured by the method according to the present invention.
この保温性テストにおいて、表１に示すように、本発明
に係る方法により製造した真空二重容器のテスト試料と
して、排気時間を異にする３種類の試料Ａ１．Ａ！、Ａ
３を各３本づつ用意し、これと比較するための試料とし
て、内容器外表面を脱脂して、ｌ箔で覆ったものＢ ｌ
＋ Ｂ ２ ＋ Ｂ ３、内容器外表面に酸化被膜の
み形成したものＣ，、Ｃ，、Ｃ，、及び内容器外表面を
脱脂したままのものり、、Ｄ、、Ｄ。In this heat retention test, as shown in Table 1, three types of samples A1. A! ,A
Three bottles of each of 3 were prepared, and as a sample for comparison, the outer surface of the inner container was degreased and covered with l foil.
+ B 2 + B 3, those with only an oxide film formed on the outer surface of the inner container C, , C, , C, and those with the outer surface of the inner container left degreased, , D, , D.
を用意した。また、従来の方法により製造した真空二重
容器として、内容器外表面を脱脂して電解メツキし、排
気時間を１００分としたものＥｌ及び内容器外表面を脱
脂したままとし、排気時間を１００分としたものＤ４を
用意した。なお、いずれの試料もゲッターは使用されて
いない。prepared. In addition, as a vacuum double container manufactured by the conventional method, the outer surface of the inner container was degreased and electrolytically plated, and the evacuation time was 100 minutes. A portion D4 was prepared. Note that no getter was used in any of the samples.
そして、各試料について、
■ 初期：製造直後、
■ ｌエージングサイクル：
製造後１週間９５℃雰囲気下に置いた後、■ ２エージ
ングサイクル：
製造後２週間（■よりさらに１週間）
９５℃雰囲気下に置いた後、
■ ４エージングサイクル：
製造後４週間（■よりさらに２週間）
９５°Ｃ雰囲気下に置いた後、
の４段階において、９５℃の熱湯を内容器ｌに入れて２
４時間後のその湯の温度を測定することにより、保温性
をテストした。For each sample, ■ Initial stage: Immediately after production, ■ 1 aging cycle: After being placed in a 95°C atmosphere for 1 week after production, ■ 2 aging cycle: 2 weeks after production (1 week more than ■) in a 95°C atmosphere ■ 4 aging cycles: 4 weeks after production (2 weeks more than ■) After being placed in a 95°C atmosphere, in the 4 stages of
Heat retention was tested by measuring the temperature of the water after 4 hours.
このテスト結果を第２ａ図〜第２ｃ図及び第３図に示す
。各図において、温度曲線の上下によって９５℃の熱湯
の２４時間保温後の温度降下、すなわち２４時間保温力
の大小を知ることができ、温度曲線の減少勾配によって
エージングによる真空度の低下、すなわち真空維持力の
大小を知ることができる。また、同一種類の材料、例え
ばＡ、、Ａ２、Ａ、について各図を比較することによっ
て製造時の排気時間の長短の影響を知ることができる。The test results are shown in FIGS. 2a to 2c and 3. In each figure, you can see the temperature drop after keeping hot water at 95℃ for 24 hours, that is, the magnitude of the heat retention ability for 24 hours, by the top and bottom of the temperature curve, and the decreasing slope of the temperature curve indicates the decrease in the degree of vacuum due to aging, that is, the vacuum You can know the size of your staying power. Furthermore, by comparing the figures for the same type of material, for example A, A2, A, it is possible to know the influence of the evacuation time during manufacturing.
本テスト結果により保温性及び排気時間に関する次の事
項が確認された。The results of this test confirmed the following items regarding heat retention and exhaust time.
ｉ）例えば第２ｂ図において、試料Ａ２と試料Ｂ２、ま
たは試料Ｃ２と試料Ｄ２を比較すると明らかなように、
内容器ｌの外表面に酸化被膜を形成することにより、２
４時間保温力が向上する。i) For example, as shown in FIG. 2b, when comparing sample A2 and sample B2, or sample C2 and sample D2,
By forming an oxide film on the outer surface of the inner container l,
Improves heat retention for 4 hours.
ｉり例えば第２ｂ図において、試料Ａ２と試料Ｃ２、又
は試料Ｂ２と試料Ｄ！を比較すると明らかなように、内
容器ｌの外表面をＡＱ箔で覆うことにより、２４時間保
温力が向上する。For example, in Figure 2b, sample A2 and sample C2, or sample B2 and sample D! As is clear from the comparison, by covering the outer surface of the inner container 1 with AQ foil, the heat retention ability for 24 hours is improved.
１ｉｉ） 排気時間の短い場合を示す第２ａ図におい
て、試料Ａ、と試料Ｂ１％又は試料Ｃ８と試料り、を比
較すると明らかなように、内容器ｌの外表面に酸化被膜
を形成することにより、ｌエージングサイクルでは真空
維持力が向上する。すなわち、排気時間が短くても吸蔵
ガスの脱気、排気が十分に行なわれる。1ii) In Figure 2a, which shows the case where the evacuation time is short, it is clear that by forming an oxide film on the outer surface of the inner container L, it is clear that when comparing sample A with sample B1% or sample C8 with sample A , 1 aging cycle improves vacuum maintenance ability. That is, even if the evacuation time is short, the stored gas can be sufficiently degassed and exhausted.
ｉｖ） 第３図に示す試料Ｅと第２ｂ図に示す試料Ａ
、とを比較すると明らかなように、内容器ｌの外表面に
酸化被膜を形成し、さらに、その外表面をＡ１箔で覆う
ことにより、従来と同程度の保温性を得るのには５０分
の排気時間で済む。従って本発明によれば排気時間が従
来より５０分短縮されることになる。iv) Sample E shown in Figure 3 and Sample A shown in Figure 2b
, it is clear that by forming an oxide film on the outer surface of the inner container L and then covering the outer surface with A1 foil, it takes 50 minutes to obtain the same level of heat retention as before. The exhaust time is sufficient. Therefore, according to the present invention, the evacuation time is reduced by 50 minutes compared to the conventional method.
なお、前記実施例では、内容器ｌの単品状態でその外表
面に酸化被膜Ｍ、を形成したが、二重容器に組み立てた
後、すなわち第１ｄ図に示す状態において、真空加熱排
気処理に先立って内容器ｌに酸化液ＭＭ、を形成するよ
うにしてもよい。In the above embodiment, the oxide film M was formed on the outer surface of the inner container L as a single item, but after it was assembled into a double container, that is, in the state shown in FIG. 1d, the oxide film M was formed before the vacuum heating and exhaust treatment. The oxidizing liquid MM may be formed in the inner container l.
また、前記実施例では、内容器ｌの外表面をアルミ箔２
で覆うようにしたが、銅箔等の薄板で覆うようにしても
同様の効果が得られる。In the above embodiment, the outer surface of the inner container l is covered with aluminum foil 2.
The same effect can be obtained by covering with a thin plate such as copper foil.
（発明の効果）
以上の説明から明らかなように本発明によれば、内容器
外表面に酸化被膜を形成してその外表面を銅又はアルミ
ニウムの薄板で覆うものであり、脱脂、酸洗処理やメツ
キ処理を施さないため、作業が容易であり、生産性が良
く、かつ、安価に製造できる。しかも真空排気処理時に
は、内容器外表面に既に従前の工程で酸化被膜が形成さ
れているため、吸蔵ガスの離脱量が減少して排気時間が
短縮されるとともに、その後の吸蔵ガスの離脱が防止さ
れて真空度が維持されるうえ、銅又はアルミニウムの薄
板のふく射熱遮断効果により、保温性が大幅に向上する
。(Effects of the Invention) As is clear from the above description, according to the present invention, an oxide film is formed on the outer surface of the inner container, and the outer surface is covered with a thin plate of copper or aluminum, and is subjected to degreasing and pickling treatment. Since it does not require plating or plating, it is easy to work with, has good productivity, and can be manufactured at low cost. Moreover, during the vacuum evacuation process, an oxide film has already been formed on the outer surface of the inner container in the previous process, so the amount of released gas is reduced, the evacuation time is shortened, and subsequent release of stored gas is prevented. In addition to maintaining the degree of vacuum, heat retention is greatly improved due to the radiation heat blocking effect of the copper or aluminum thin plates.
また、このように加熱排気処理時の吸蔵ガスの離脱量が
減少し、しかも封止後の真空維持力が向上することによ
り、ゲッターの使用量が大幅に減少する等の効果を有し
ている。In addition, the amount of occluded gas released during heating and exhaust processing is reduced, and the ability to maintain vacuum after sealing is improved, resulting in a significant reduction in the amount of getter used. .
第１ａ図〜第１ｅ図は本発明に係る方法による製造工程
の各工程における真空二重容器の断面図、第２ａ図〜第
２ｃ図及び第３図は本発明に係る方法により製造された
真空二重容器の保温性に関するテスト結果を示す図であ
る。
１・・・内容器、２・・・アルミ箔（ｉ板）、３・・・
外容器、Ｍ２・・・酸化被膜。
特 許 出 願 人 象印マホービン株式会社代 理
人 弁理士 青白 葆 ほか２名＠２ａ面
第２ｃＷ
第２ｂ！！１
宿３図
工−ジンクサイクｌしFigures 1a to 1e are cross-sectional views of a vacuum double container in each step of the manufacturing process according to the method of the present invention, and Figures 2a to 2c and 3 are vacuum chambers manufactured by the method of the present invention. It is a figure which shows the test result regarding the heat retention property of a double container. 1... Inner container, 2... Aluminum foil (i-board), 3...
Outer container, M2... oxide film. Patent applicant Zojirushi Mahobin Co., Ltd. Agent
People Patent attorney Qingbai Ao and 2 others @2a side 2cW 2b! ! 1 Inn 3 Art - Zinc cycle
Claims (1)
構造を形成し、内容器の外表面を銅又はアルミニウムの
薄板で覆うとともに、内容器と外容器の間の空間を真空
にしてなる金属製真空二重容器の製造方法において、 内容器の外表面に酸化被膜を形成した後、内容器と外容
器の間の空間を加熱排気処理して真空封止することを特
徴とする金属製真空二重容器の製造方法。(1) A metal inner container and an outer container are joined at the mouth to form a double wall structure, the outer surface of the inner container is covered with a thin copper or aluminum plate, and the space between the inner container and the outer container is In the manufacturing method of a metal vacuum double container, which is performed by evacuating the inner container, an oxide film is formed on the outer surface of the inner container, and then the space between the inner container and the outer container is heated and evacuated to seal the container under vacuum. A method for manufacturing a special metal vacuum double container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29450887A JPH0698107B2 (en) | 1987-11-20 | 1987-11-20 | Manufacturing method of metal vacuum double container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29450887A JPH0698107B2 (en) | 1987-11-20 | 1987-11-20 | Manufacturing method of metal vacuum double container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01135317A true JPH01135317A (en) | 1989-05-29 |
| JPH0698107B2 JPH0698107B2 (en) | 1994-12-07 |
Family
ID=17808686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29450887A Expired - Lifetime JPH0698107B2 (en) | 1987-11-20 | 1987-11-20 | Manufacturing method of metal vacuum double container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0698107B2 (en) |
-
1987
- 1987-11-20 JP JP29450887A patent/JPH0698107B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0698107B2 (en) | 1994-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH086168B2 (en) | Immobilization of carbon steel using encapsulated oxygen | |
| US2398449A (en) | Method of making hermetic seals | |
| JPH01135317A (en) | Method for manufacturing vacuum double container of metal | |
| JP2017136610A (en) | Fluxless brazing method of aluminum material and processing device for brazing | |
| JPH01297022A (en) | Metallic vacuum double structure body and manufacture | |
| JP2818430B2 (en) | Manufacturing method of metal thermos | |
| JP2774748B2 (en) | Metal vacuum double container and method of manufacturing the same | |
| JPH01268520A (en) | Manufacture of titanium thermos bottle | |
| JPH0698108B2 (en) | Metal vacuum double structure and manufacturing method thereof | |
| JPH01303112A (en) | Manufacture of metallic vacuum double structure | |
| JPH0592136A (en) | Adsorbent packing bag and production thereof | |
| JPS5944957B2 (en) | Dehydrogenation equipment for welding difficult-to-weld materials | |
| JPH02282087A (en) | Storage container for semiconductor product | |
| US2456968A (en) | Process for outgassing photocells containing antimony | |
| JP3520180B2 (en) | Manufacturing method of vacuum structure | |
| JPH04236701A (en) | Method for degassing metallic powder | |
| JPS58203342A (en) | Manufacture of solar heat collector | |
| JPH02286110A (en) | Production of vacuum bottle made of titanium | |
| JPS58164947A (en) | Gas evacuating method for solar heat collector | |
| JP2743012B2 (en) | Method of manufacturing heat pipe for high temperature using container made of heat-resistant metal which is easily oxidized | |
| JPS62190640A (en) | Gas introducing device for vacuum equipment | |
| JPS60112241A (en) | Vacuum discharge tube and its manufacturing method | |
| JPH078395A (en) | Metal made vacuum double layer container and the manufacture thereof | |
| JP3690845B2 (en) | Heat treatment method for titanium vacuum vessel | |
| JP3116339B2 (en) | Quartz ampoule for diffusion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |