JPS6388726A - Sealing of case sealed type electric appliance - Google Patents
Sealing of case sealed type electric applianceInfo
- Publication number
- JPS6388726A JPS6388726A JP23407486A JP23407486A JPS6388726A JP S6388726 A JPS6388726 A JP S6388726A JP 23407486 A JP23407486 A JP 23407486A JP 23407486 A JP23407486 A JP 23407486A JP S6388726 A JPS6388726 A JP S6388726A
- Authority
- JP
- Japan
- Prior art keywords
- sealant
- sealing
- case
- infrared
- curing
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims description 14
- 239000000565 sealant Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
- 229920001187 thermosetting polymer Polymers 0.000 claims description 6
- 238000001723 curing Methods 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Cookers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はケース密封型電気機器のシール方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of sealing a case-sealed electrical device.
（従来の技術）
第３図、第４図に示すようにケース密封型電気機器ｌは
、図示しない電気機器本体及び端子２を組み付けたベー
ス３にケース４を嵌合して接合した後、該接合部５及び
その近傍に熱硬化性シール剤６を塗布して熱硬化させる
ことにより、当該接合部５をシールして異物の進入を阻
止し、内部の電気機器本体の動作の信頼性を確保するよ
うになっている。そして、このシール剤の熱硬化は、従
来、オーブン内で行なわれている。(Prior Art) As shown in FIGS. 3 and 4, a case-sealed electrical device 1 is constructed by fitting and joining a case 4 to a base 3 on which an electrical device main body (not shown) and a terminal 2 are assembled. By applying a thermosetting sealant 6 to the joint 5 and its vicinity and curing it with heat, the joint 5 is sealed, preventing foreign matter from entering, and ensuring the reliability of the operation of the internal electrical equipment body. It is supposed to be done. Conventionally, the sealant is thermally cured in an oven.
（発明が解決しようとする問題点）
しかしながら、このようなオーブンを用いてのシール剤
の熱硬化方法では、相当の加熱時間を要することから、
電気機器本体に与える熱影響が大きくなり動作特性に変
動を来したり、加熱中にシール剤が内部へ浸透し易いう
え、オーブン内の不均一な温度分布により、シール剤の
硬化状態にバラツキが生じる等の問題があった。また、
オーブンでは、所定個数単位毎にいわゆるバッチ式に処
理されるため、インライン化か困難であり、生産性が悪
いという問題があった
本発明は斯かる問題点に鑑みてなされたもので、シール
剤の硬化時間が短縮可能なケース密封型電気機器のシー
ル方法を提供することを目的とする。(Problems to be Solved by the Invention) However, such a method of thermally curing a sealant using an oven requires a considerable amount of heating time.
The thermal effect on the electrical equipment itself becomes large, causing fluctuations in operating characteristics, and the sealant easily penetrates inside during heating, and uneven temperature distribution within the oven causes variations in the curing state of the sealant. There were some problems such as: Also,
In ovens, processing is carried out in a so-called batch manner in units of a predetermined number of pieces, making it difficult to implement in-line processing and resulting in poor productivity.The present invention was made in view of these problems. An object of the present invention is to provide a method for sealing a case-sealed electrical device that can shorten the curing time.
（問題点を解決するための手段）
ＶＴＩ記問題点を解決するため、本発明は、ケースとベ
ースとの接合部に塗布した熱硬化性シール剤を赤外線照
射により熱硬化して当該接合部をシール４−るものであ
る。(Means for Solving the Problems) In order to solve the problems described in VTI, the present invention heat-cures the thermosetting sealant applied to the joint between the case and the base by infrared irradiation, thereby sealing the joint. The seal is 4-.
（作用）
このため、ソール剤は、赤外線の輻射熱と、赤外線を吸
収してその熱エネルギーを保有したプラスチック製のベ
ース又はケースからの熱伝導とにより、急速に加熱され
て短時間に硬化する。(Function) Therefore, the sole agent is rapidly heated and cured in a short time by infrared radiant heat and heat conduction from the plastic base or case that absorbs infrared rays and retains the thermal energy.
（実施例） 次に、本発明の一実施例を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 drawings.
第１図は本発明を適用するケース密封型電気機器の製造
装置のシール工程を示し、ベルトコンベア１１の上流側
には、上方にシール剤投与器１２、下方にヒータ１３が
設置され、さらにそれらの下流側には、」二方に複数の
赤外線ランプ１４を列設置７た赤外線照射室１５が設け
られている。これらの機器を備えたシール工程は、塗布
工程、硬化工程及び冷却工程からなっている。そして、
これらの各工程はインライン化され、ベルトコンベア１
１上を所定間隔で搬送する電気機器ｌに対して連続的に
適用される。FIG. 1 shows the sealing process of a manufacturing apparatus for case-sealed electrical equipment to which the present invention is applied. On the upstream side of a belt conveyor 11, a sealant dispenser 12 is installed above and a heater 13 is installed below. An infrared irradiation chamber 15 is provided on the downstream side of the infrared irradiation chamber 15 in which a plurality of infrared lamps 14 are arranged in rows 7 on two sides. The sealing process equipped with these devices consists of a coating process, a curing process, and a cooling process. and,
Each of these processes is inline, with belt conveyor 1
1 is continuously applied to electrical equipment l that is conveyed at predetermined intervals.
塗布工程は、組み立てられて反転状態でベルトコンベア
１１上を搬送する電気機器１の裏面のケースとベースの
接合部（第３図、第４図参照）にシール剤投与器１２に
より、たとえば、エポキシ樹脂系の熱硬化性シール剤を
塗布する一方、下方よりヒータ１３にて電気機器１を予
熱する。In the coating process, a sealant dosing device 12 applies, for example, epoxy to the joint between the case and the base on the back side of the electrical device 1 (see FIGS. 3 and 4), which is assembled and transported on the belt conveyor 11 in an inverted state. While applying a resin-based thermosetting sealant, the electric device 1 is preheated from below using a heater 13.
硬化工程は、赤外線照射室１５を通過する電気機器１１
：、赤外線ランプ１４により赤外線を照射してシール剤
を熱硬化させるものである。In the curing process, the electrical equipment 11 passes through the infrared irradiation chamber 15.
: The sealant is thermally cured by irradiating infrared rays with an infrared lamp 14.
冷却工程は、赤外線照射室１５を出た電気機器ｌをファ
ン冷却するものである。In the cooling step, the electric equipment l leaving the infrared irradiation chamber 15 is cooled by a fan.
第２図は、面記シール工程におけるシール剤の温度変化
を示すっすなわち、塗布工程において電気機器１に塗布
されたシール剤は、赤外線照射室Ｘ５に入る前にヒータ
１３により温度Ｔ、まで予熱される。従って、シール剤
はこの子熟により一部ゲル化して流動性がよくなるため
、電気機器ｌの接合部に十分行き渡ることになる。また
、この予熱により、シール剤は赤外線照射室１５に入る
的に加熱され、赤外線照射室１５内で急激に温度変化す
ることがないため、シール剤中に気泡が発生するのを防
止することができる。FIG. 2 shows the temperature change of the sealant in the surface sealing process; that is, the sealant applied to the electrical equipment 1 in the application process is preheated to temperature T by the heater 13 before entering the infrared irradiation chamber X5. be done. Therefore, the sealant partially gels due to this ripening and has good fluidity, so that it can be sufficiently spread over the joints of the electrical equipment 1. Furthermore, due to this preheating, the sealant is heated as it enters the infrared irradiation chamber 15, and the temperature does not change rapidly within the infrared irradiation chamber 15, so that it is possible to prevent bubbles from forming in the sealant. can.
続いて、シール剤は赤外線照射室１５内にて赤外線ラン
ブト１により硬化温度Ｔ、まで加熱される。ここで、赤
外線はプラスチック材料に吸収されやすいため、電気機
器ｌのプラスチック製のベース又はケースは赤外線を吸
収して熱エネルギーを保￥Ｔ＃″る。従って、ソール剤
は赤外線ランブト１の照射による輻射熱と、熱を保有し
たベース又はケースからの熱伝導とにより急速に加熱さ
れるため、硬化が早く、加熱時間を短縮することができ
ろ。また、シール剤中の添加物が外気へ抜は出易い。Subsequently, the sealant is heated to a curing temperature T by the infrared lamp 1 in the infrared irradiation chamber 15. Here, since infrared rays are easily absorbed by plastic materials, the plastic base or case of the electrical equipment absorbs infrared rays and retains thermal energy. Therefore, the sole agent is exposed to the irradiation of infrared rays. Because it is rapidly heated by radiant heat and heat conduction from the base or case that retains heat, it cures quickly and reduces heating time.Also, additives in the sealant do not escape to the outside air. Easy to come out.
このように、熱硬化時の加熱時間が短いことから、内部
の電気機器本体の熱応力や熱変形が小さくなり、動作特
性が変動するようなことはない。In this way, since the heating time during thermosetting is short, the thermal stress and thermal deformation of the internal electrical equipment main body are reduced, and the operating characteristics do not fluctuate.
また、本実施例では、赤外線による硬化加熱に先立って
予熱を行ない、２段階に加熱を行なうものであるから、
シール剤の硬化速度をコントロールすることが可能とな
り、シール剤の内部への流れ込みを防止することができ
る。Furthermore, in this example, preheating is performed prior to curing heating using infrared rays, and heating is performed in two stages.
It becomes possible to control the curing speed of the sealant, and it is possible to prevent the sealant from flowing into the interior.
すなわち、常温で一定粘度を存する熱硬化性ノール剤は
、加熱してゆくと、−旦ゲル化した後、急速に硬化する
ものであるから、Ｔ１温度を低くすると、予熱段階では
十分にゲル化せず、硬化加熱段階でゲル化を経過して硬
化するノニめ、硬化時間が長くなり、逆にＴ、温度を高
くすると、予熱段階で一部硬化するため、硬化時間が早
くなる。In other words, a thermosetting nol agent that has a constant viscosity at room temperature will first gel and then harden rapidly when heated, so if the T1 temperature is lowered, gelation will be sufficient during the preheating stage. If the resin is not cured through gelatinization during the curing/heating stage, the curing time will be longer.On the other hand, if the temperature is increased, the curing time will be faster as it will partially harden during the preheating stage.
このように、予熱段階でシール剤をいかなる状態にして
おくかにより、硬化速度をコントロールすることかでき
るため、内部へのシール剤の流れ込みの可能性のあるも
のは、この方法により対処することができる。In this way, the curing speed can be controlled by the state in which the sealant is kept during the preheating stage, so this method can be used to deal with cases where the sealant may flow into the interior. can.
さらに、本実施例は、インライン化された赤外線照射に
より、シール剤の硬化を連続的に行なうものであるから
、赤外線が均一に照射されて温度分布は均一となり、シ
ール状態は良好でバラツキが少ない。Furthermore, in this example, the sealant is continuously cured by inline infrared irradiation, so the infrared rays are uniformly irradiated, the temperature distribution is uniform, and the sealing condition is good and there is little variation. .
なお、前記実施例における赤外線照射室１５として、加
熱温度及び加熱時間の設定が可能な市販の赤外線加熱炉
（赤外線リフロー炉）を用いれば、温度１時間の調整が
容易で簡便である。Note that if a commercially available infrared heating furnace (infrared reflow oven) in which the heating temperature and heating time can be set is used as the infrared irradiation chamber 15 in the above embodiment, the temperature can be easily adjusted to one hour.
（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、シー
ル剤の硬化を赤外線照射により、輻射とベース又はケー
スからの熱伝導とを通じて行なうものであるから、シー
ル剤の硬化時間が短縮される。従って、電気機器本体へ
の熱影響が少なく、動作特性の変動がないうえ、内部へ
のシール剤の流れ込みが少ない等の効果を有している。(Effects of the Invention) As is clear from the above description, according to the present invention, the sealant is cured by infrared irradiation through radiation and heat conduction from the base or case. Time is reduced. Therefore, there are effects such as less thermal influence on the main body of the electrical equipment, no fluctuation in operating characteristics, and less flow of sealant into the interior.
また、実施例のように、赤外線照射を所定間隔で搬送す
る電気機器に対して連続的に行なえば、シール工程をイ
ンライン化することが可能となり生産性が向上するうえ
、加熱温度分布が均一となり、シール性が安定し、バラ
ツキがなく、製品価値が向上する。Furthermore, as in the example, if infrared rays are continuously applied to electrical equipment that is being transported at predetermined intervals, the sealing process can be done in-line, improving productivity and making the heating temperature distribution uniform. , the sealing performance is stable, there is no variation, and the product value is improved.
第１図は本発明を適用する製造装置のシール工程を示す
正面図、第２図はソール剤温度の時間変化を示す図、第
３図はシールされた電気機器の斜視図、第４図は電気機
器のシール部を示す部分拡大断面図である。
ｌ・・・電気機器、３・・・ベース、４・・・ケース、
５・・・接合部、６・・・シール剤、１４・・・赤外線
ランプ、１５・・・赤外線照射室。Figure 1 is a front view showing the sealing process of the manufacturing equipment to which the present invention is applied, Figure 2 is a diagram showing the change in sole agent temperature over time, Figure 3 is a perspective view of the sealed electrical equipment, and Figure 4 is FIG. 3 is a partially enlarged sectional view showing a seal portion of the electrical device. l...Electrical equipment, 3...Base, 4...Case,
5... Joint portion, 6... Sealing agent, 14... Infrared lamp, 15... Infrared irradiation chamber.
Claims (2)
ール剤を赤外線照射により熱硬化して当該接合部をシー
ルすることを特徴とするケース密封型電気機器のシール
方法。(1) A method for sealing a case-sealed electrical device, characterized in that a thermosetting sealant applied to a joint between a case and a base is thermally cured by infrared irradiation to seal the joint.
機器に対して連続的に行なうことを特徴とする特許請求
の範囲第１項に記載のケース密封型電気機器のシール方
法。(2) The method for sealing a case-sealed electrical device according to claim 1, wherein the infrared ray irradiation is performed continuously on electrical devices that are transported one after another at predetermined intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23407486A JPS6388726A (en) | 1986-09-30 | 1986-09-30 | Sealing of case sealed type electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23407486A JPS6388726A (en) | 1986-09-30 | 1986-09-30 | Sealing of case sealed type electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6388726A true JPS6388726A (en) | 1988-04-19 |
Family
ID=16965186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23407486A Pending JPS6388726A (en) | 1986-09-30 | 1986-09-30 | Sealing of case sealed type electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6388726A (en) |
-
1986
- 1986-09-30 JP JP23407486A patent/JPS6388726A/en active Pending
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