JPH0147873B2 - - Google Patents
Info
- Publication number
- JPH0147873B2 JPH0147873B2 JP57060919A JP6091982A JPH0147873B2 JP H0147873 B2 JPH0147873 B2 JP H0147873B2 JP 57060919 A JP57060919 A JP 57060919A JP 6091982 A JP6091982 A JP 6091982A JP H0147873 B2 JPH0147873 B2 JP H0147873B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- insulating powder
- opening
- bent
- silicone material
- 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
Links
- 239000000843 powder Substances 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 28
- 229920001296 polysiloxane Polymers 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000002210 silicon-based material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 16
- 239000000395 magnesium oxide Substances 0.000 description 8
- 238000009413 insulation Methods 0.000 description 5
- 238000000137 annealing Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
【発明の詳細な説明】
本発明は、シーズヒータ内に収容する発熱線と
パイプとの間に充填した絶縁物粉体の耐湿性を高
めることを目的とするシーズヒータの製造法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a sheathed heater, the purpose of which is to increase the moisture resistance of insulating powder filled between a heating wire and a pipe housed in the sheathed heater. .
従来のシーズヒータは第4図に示す如く、外側
を構成する金属パイプ1とリード線2に接続して
パイプ内に位置したコイル状の発熱体3との間に
絶縁物粉体4を充填させているが、絶縁材として
使用されているマグネシア粉は吸湿性を有するた
め、多湿雰囲気内に長時間放置すると絶縁抵抗が
低下する欠点があつた。そのため、パイプ内に充
填するマグネシア粉末にシリコン系樹脂5を混合
したり、パイプ内壁に有機シリコン材を塗布した
あと加熱し、シリコン材を溶融させてマグネシア
粉末の表面にコーテイングして防湿加工を行つて
いた。 As shown in FIG. 4, a conventional sheathed heater has an insulating powder 4 filled between a metal pipe 1 constituting the outside and a coil-shaped heating element 3 connected to a lead wire 2 and located inside the pipe. However, since the magnesia powder used as an insulating material has hygroscopic properties, it has the disadvantage that insulation resistance decreases when left in a humid atmosphere for a long time. Therefore, moisture-proofing can be achieved by mixing silicone resin 5 with magnesia powder to be filled in the pipe, or by applying an organic silicone material to the inner wall of the pipe and heating it to melt the silicone material and coating it on the surface of the magnesia powder. It was on.
しかしながらシリコン系樹脂粉をマグネシア粉
に一定量混入しても、両者の比重の差により常に
一定比率を保つことが難しく、又、パイプ内壁に
シリコン材を塗布すると乾燥工程を必要とする等
の欠点があつた。さらにヒータを折曲げる場合は
パイプを焼きなましする必要があるが、パイプ内
のマグネシア粉にシリコン材が混入していると焼
きなましによりマグネシア粉が劣化して防湿性が
無くなるという問題点を有していた。 However, even if a certain amount of silicone resin powder is mixed with magnesia powder, it is difficult to maintain a constant ratio due to the difference in specific gravity between the two, and there are also drawbacks such as the need for a drying process when silicone material is applied to the inner wall of the pipe. It was hot. Furthermore, when bending the heater, the pipe needs to be annealed, but if the magnesia powder inside the pipe contains silicone material, the annealing deteriorates the magnesia powder and causes the problem of loss of moisture resistance. .
本発明はかかる従来の欠点に鑑みてなされたも
ので、金属パイプと発熱体との間に絶縁物粉体を
充填し、発熱線に接続したリード線をパイプの開
口部から外に引出すと共に有機シリコン材を絶縁
物粉体と別に開口部内に収容する組立工程と、開
口部を口元シール部でシールする密封工程と、有
機シリコン材から離れたパイプの折曲部分を焼き
なましてから曲げる折曲工程と、パイプを折曲げ
たあと耐湿性を失なわない温度で有機シリコン材
を加熱し蒸発させてパイプ内に行きわたらせて絶
縁物粉体の表面に蒸着させる蒸発工程とからなる
ことを特徴とする。 The present invention has been made in view of such conventional drawbacks, and is made by filling insulating powder between a metal pipe and a heating element, allowing the lead wire connected to the heating wire to be drawn out from the opening of the pipe, and An assembly process in which the silicon material is accommodated in the opening separately from the insulating powder, a sealing process in which the opening is sealed with a mouth seal, and a bending process in which the bent part of the pipe that is away from the organic silicon material is annealed and then bent. and an evaporation step in which the organosilicon material is heated and evaporated at a temperature that does not lose its moisture resistance after the pipe is bent, and is spread throughout the pipe and deposited on the surface of the insulating powder. .
吸湿性を有する絶縁物粉体と別にパイプの開口
部内に有機シリコン材を収容するので、有機シリ
コン材と離れたパイプの折曲部分を焼きなまして
もシリコン材は蒸発せず、パイプを折曲げてから
シリコン材を加熱し蒸発させることにより絶縁物
粉体の表面に夫々蒸着させて不活性化させること
ができるものである。 Since the organosilicon material is housed inside the opening of the pipe in addition to the hygroscopic insulating powder, the silicone material will not evaporate even if the bent part of the pipe away from the organosilicon material is annealed. By heating and evaporating the silicon material, it can be deposited on the surface of the insulating powder and inactivated.
本発明を実施例を図面に基づいて説明すると、
11はステンレス、鉄、銅などで形成した有底ま
たは無底の金属パイプで、一端または両端に夫々
開口部12を有している。ついで、パイプ11内
にコイル状の発熱線13を収容し、発熱線とパイ
プ11との間にマグネシア等のセラミツク粉から
なる絶縁物粉体14を充填し、発熱線13の両端
に接続したリード線15を夫々開口部12から外
方に引出す。さらにパイプ内に収容した絶縁物粉
体の外側で、且つ開口部12内に、樹脂、ゴム、
オイル、ワニス、その他の材料からなる有機シリ
コン材16を単独またはセラミツクと混合したも
のを収容した後、シリコン材16の外側に口元シ
ール部17を取付けてシールし、リード線15を
口元シール部から引出してある。 Examples of the present invention will be described based on the drawings.
Reference numeral 11 denotes a bottomed or bottomless metal pipe made of stainless steel, iron, copper, etc., and has an opening 12 at one end or both ends, respectively. Next, a coiled heating wire 13 is housed in the pipe 11, and an insulating powder 14 made of ceramic powder such as magnesia is filled between the heating wire and the pipe 11, and leads are connected to both ends of the heating wire 13. The wires 15 are each led out from the openings 12. Furthermore, resin, rubber,
After containing an organic silicone material 16 made of oil, varnish, or other material alone or mixed with ceramic, a mouth seal part 17 is attached to the outside of the silicone material 16 to seal it, and a lead wire 15 is inserted from the mouth seal part. It's pulled out.
パイプ11を折曲げるには、パイプに亀裂が入
るのを防止するため折曲部分の焼きなましを行う
が、パイプがステンレスパイプの場合には1000℃
以上になる。しかし、熱に弱いシリコン材はパイ
プの端部に存する開口部内に位置しているため、
折曲部分を焼きなましてもシリコン材は加熱され
ず、絶縁物粉体の耐湿性が劣化することはない。 To bend the pipe 11, the bent part is annealed to prevent cracks from forming in the pipe, but if the pipe is a stainless steel pipe, annealing is performed at 1000°C.
That's all. However, since the heat-sensitive silicon material is located inside the opening at the end of the pipe,
Even if the bent portion is annealed, the silicone material will not be heated, and the moisture resistance of the insulating powder will not deteriorate.
焼きなましの際、パイプの開口部と折曲部分と
の間をペンチ等の工具(図示せず)で保持して熱
の伝導を防止できる。 During annealing, a tool such as pliers (not shown) can be used to hold the pipe between the opening and the bent portion to prevent heat conduction.
次に、シリコン材の耐湿性が失われない温度、
例えば300〜700℃で1〜3時間加熱し蒸発させて
パイプ内の絶縁物粉体の表面に蒸着させて不活性
化させて耐湿性を高める。 Next, the temperature at which the moisture resistance of the silicone material is not lost;
For example, it is heated at 300 to 700°C for 1 to 3 hours to evaporate it, and then it is deposited on the surface of the insulating powder inside the pipe to inactivate it and improve its moisture resistance.
尚、本発明に用いるシリコン材は、メチル基、
ジメチル基を含むシリコン材であれば適用出来る
し、また無機絶縁物粉体はマグネシア以外のアル
ミナ、シリカ、その他のセラミツク材料も必要に
応じて使用できる。 In addition, the silicon material used in the present invention has a methyl group,
Any silicone material containing a dimethyl group can be used, and alumina, silica, or other ceramic materials other than magnesia can also be used as the inorganic insulating powder, if necessary.
次に、本実施例の作用について説明すると、コ
イル状に巻回した発熱線13とパイプ11との間
に絶縁物粉体14を充填し、さらにパイプの開口
部12に口元シール部17を取付けて口元シール
部から夫々リード線21を引出し、口元シール部
の内側に絶縁物粉体と別個に有機シリコン材16
を収容するので、シリコン材16から離れた折曲
部分を1000℃以上に焼きなます際、パイプ内の絶
縁物粉体中にシリコン材が混入していると該加熱
によつてシリコン材の耐湿性を失うが、有機シリ
コン材の蒸発処理を行う前段階では、絶縁物粉体
のみであるため、1000℃以上で焼きなましを行う
折曲部分は有機シリコン材15から離れていて高
温にならないため有機シリコン材は蒸発しない。 Next, to explain the operation of this embodiment, an insulating powder 14 is filled between the coiled heating wire 13 and the pipe 11, and a mouth seal part 17 is attached to the opening 12 of the pipe. Then, the lead wires 21 are pulled out from the mouth seal part, and the organic silicon material 16 is placed inside the mouth seal part separately from the insulating powder.
Therefore, when annealing the bent part away from the silicone material 16 to 1000℃ or higher, if silicone material is mixed in the insulating powder inside the pipe, the moisture resistance of the silicone material will deteriorate due to the heating. However, before the organosilicon material is evaporated, it is only insulating powder, so the bent part that is annealed at 1000°C or higher is far from the organosilicon material 15 and does not reach high temperatures. Silicone material does not evaporate.
ヒータを所定形状に折曲加工後、絶縁物粉体と
別個にパイプの開口部内に位置したシリコン材の
耐湿性を失わない300〜700℃の温度でパイプ全体
を1〜3時間加熱し、有機シリコン材15を蒸発
させてパイプ内全体に行きわたらせて絶縁物粉体
の表面に蒸着処理を行う。 After bending the heater into a predetermined shape, the entire pipe is heated for 1 to 3 hours at a temperature of 300 to 700°C, which does not lose the moisture resistance of the silicone material placed inside the opening of the pipe, separately from the insulating powder. The silicon material 15 is evaporated and distributed throughout the pipe to perform a vapor deposition process on the surface of the insulating powder.
しかしパイプ11の開口部12はヒータにとつ
て非発熱部分であるため、開口部の過熱劣化を生
じることはない。 However, since the opening 12 of the pipe 11 is a non-heat generating part for the heater, the opening does not deteriorate due to overheating.
絶縁物粉体の表面を不活性化するために使用す
るシリコン材を絶縁物粉体中に混入した従来のパ
イプヒータは、発熱線と接しているシリコン材が
過熱劣化しやすかつたものに比べて優れている。 Conventional pipe heaters in which a silicone material is mixed into the insulator powder to inactivate the surface of the insulator powder are more susceptible to overheating and deterioration of the silicone material in contact with the heating wire. It's excellent.
第2図において、Aは本発明のヒータ、Bはシ
リコン材を使用しない従来のヒータの夫々の絶縁
抵抗の変化を示すもので、40℃で95%以上の相対
湿度における特性を示している。 In FIG. 2, A shows the change in insulation resistance of the heater of the present invention, and B shows the change in insulation resistance of a conventional heater that does not use a silicone material, and shows the characteristics at 40° C. and a relative humidity of 95% or more.
以上の如く、本発明は金属パイプ内の発熱線と
パイプとの間に充填させる絶縁物粉体と別に、パ
イプの開口部に装着する口元シール部内に有機シ
リコン材を収容するので収容作業が容易であり、
折曲部分を焼きなましても有機シリコン材から離
れているためシリコン材が蒸発して吸湿性を劣化
させることはなく、パイプの折曲げ後に有機シリ
コン材を加熱し蒸発させてパイプ全体に行きわた
らせるため折曲部分の絶縁物粉体の防湿性も維持
でき、湿度に対して絶縁物粉体が耐久性を有して
いるためヒータを長期間使用しても絶縁抵抗の劣
化を防止できる。 As described above, in the present invention, in addition to the insulating powder that is filled between the heating wire in the metal pipe and the pipe, the organic silicon material is stored in the mouth seal part that is attached to the opening of the pipe, making the storage work easy. and
Even if the bent part is annealed, the silicone material will not evaporate and deteriorate its hygroscopicity because it is separated from the organic silicone material.After the pipe is bent, the organic silicone material will be heated and evaporated to spread throughout the pipe. Therefore, the moisture resistance of the insulating powder at the bent portion can be maintained, and since the insulating powder has durability against humidity, deterioration of insulation resistance can be prevented even if the heater is used for a long period of time.
図面は本発明の実施例を示すもので、第1図は
全体の断面図、第2図は本発明と従来のヒータの
絶縁物の絶縁抵抗特性を示した説明図、第3図は
折曲部分を有したヒータの正面図、第4図は従来
のヒータの一部破断した断面図である。
11…金属パイプ、12…開口部、13…発熱
線、14…絶縁物粉体、15…リード線、16…
有機シリコン材、17…口元シール部、20…折
曲部。
The drawings show an embodiment of the present invention; Fig. 1 is an overall sectional view, Fig. 2 is an explanatory diagram showing the insulation resistance characteristics of insulators of the inventive and conventional heaters, and Fig. 3 is a folded view. FIG. 4 is a partially broken sectional view of a conventional heater. DESCRIPTION OF SYMBOLS 11...Metal pipe, 12...Opening part, 13...Heating wire, 14...Insulating powder, 15...Lead wire, 16...
Organic silicon material, 17... Mouth seal part, 20... Bent part.
Claims (1)
填し、発熱線に接続したリード線をパイプの開口
部から外に引出すと共に有機シリコン材を絶縁物
粉体と別に開口部内に収容する組立工程と、開口
部を口元シール部でシールする密封工程と、有機
シリコン材から離れたパイプの折曲部分を焼きな
ましてから曲げる折曲工程と、パイプを折曲げた
あと耐湿性を失なわない温度で有機シリコン材を
加熱し蒸発させてパイプ内に行きわたらせて絶縁
物粉体の表面に蒸着させる蒸発工程とからなるシ
ーズヒータの製造法。1 Fill insulating powder between the metal pipe and the heating element, pull out the lead wire connected to the heating wire from the opening of the pipe, and store the organic silicon material in the opening separately from the insulating powder. The assembly process, the sealing process in which the opening is sealed with the mouth seal, the bending process in which the bent part of the pipe away from the organic silicone material is annealed and then bent, and the pipe does not lose its moisture resistance after being bent. A method for manufacturing a sheathed heater that consists of an evaporation process in which an organic silicon material is heated at high temperature to evaporate it, spread it inside the pipe, and deposit it on the surface of the insulating powder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6091982A JPS58178983A (en) | 1982-04-14 | 1982-04-14 | Sheathed heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6091982A JPS58178983A (en) | 1982-04-14 | 1982-04-14 | Sheathed heater |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58178983A JPS58178983A (en) | 1983-10-20 |
JPH0147873B2 true JPH0147873B2 (en) | 1989-10-17 |
Family
ID=13156267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6091982A Granted JPS58178983A (en) | 1982-04-14 | 1982-04-14 | Sheathed heater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58178983A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5389045A (en) * | 1977-01-17 | 1978-08-05 | Matsushita Electric Ind Co Ltd | Manufacturing of sheath heater |
JPS54140239A (en) * | 1978-04-22 | 1979-10-31 | Arita Kosei | Preparation of seize heater |
JPH0528035A (en) * | 1991-07-18 | 1993-02-05 | Brother Ind Ltd | Memory access controller |
-
1982
- 1982-04-14 JP JP6091982A patent/JPS58178983A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5389045A (en) * | 1977-01-17 | 1978-08-05 | Matsushita Electric Ind Co Ltd | Manufacturing of sheath heater |
JPS54140239A (en) * | 1978-04-22 | 1979-10-31 | Arita Kosei | Preparation of seize heater |
JPH0528035A (en) * | 1991-07-18 | 1993-02-05 | Brother Ind Ltd | Memory access controller |
Also Published As
Publication number | Publication date |
---|---|
JPS58178983A (en) | 1983-10-20 |
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