JPS6018135B2 - Manufacturing method of resin mold type transformer - Google Patents
Manufacturing method of resin mold type transformerInfo
- Publication number
- JPS6018135B2 JPS6018135B2 JP10259377A JP10259377A JPS6018135B2 JP S6018135 B2 JPS6018135 B2 JP S6018135B2 JP 10259377 A JP10259377 A JP 10259377A JP 10259377 A JP10259377 A JP 10259377A JP S6018135 B2 JPS6018135 B2 JP S6018135B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sealing layer
- manufacturing
- resin
- hole
- 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
Landscapes
- Insulating Of Coils (AREA)
Description
【発明の詳細な説明】
本発明は例えば計器用変圧器等の樹脂モールド形変成器
の製作法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a resin mold type transformer such as a voltage transformer.
従来けし、素鋼板の鉄心を用いた計器用変圧器等の樹脂
モールド形変成器は製造時、樹脂が硬化するときの収縮
力によって鉄心に応力が作用する。Conventionally, during manufacture of resin molded transformers such as instrument transformers that use iron cores made of raw steel sheets, stress is applied to the iron cores due to shrinkage force when the resin hardens.
この応力をそのまま鉄心に作用させると鉄心に磁気歪が
発生し磁化特性が変化して設計当初の特性を得ることが
できない欠点がある。その対策として鉄心の周囲を絶縁
物等で密封することが行なわれている。しかしながらこ
の場合変成器本体を真空注型によってモールドすると次
に述べるような問題がある。すなわち、モールド型内を
真空に引し、て合成樹脂を梓型する場合、鉄○を囲む絶
縁層内に空気が残留して相対的に高圧になりその圧力に
よって絶縁層が破壊することがある。そのため合成樹脂
が絶縁層内に浸入しその合成樹脂の硬化によって鉄ｂ‘
こ直接応力が作用し磁気歪が発生する。一方真空注型を
可能にする改良案として、鉄心を囲む絶縁層にモールド
型外と蓮適する蓬通管を設けることもある。これはモー
ルド型内を真空引きする際に、運遍管を介して絶縁層内
を同時に真空引きすることにより絶縁層内、外に圧力差
が生じないようにするものである。この蓮通管の構成と
しては従来鉄心を囲む絶縁層及びモールド型を貫通させ
かつそれぞれに対しシールして設けていた。そして、絶
縁層内外を真空引きして合成樹脂注入硬化後にこの蓮通
管を抜き取り、そる穴に粘度の高い合成樹脂を注入する
方法を用いているが、次の欠点を有していた。‘１’モ
ールド型内に蓮通管取付けのためのスペースが必要であ
り、モールド型が大きくなって機器が大形化する‘２１
連通管の絶縁層及びモールド型への取付部はシールを
要し、シールが不完全な場合、合成樹脂のもれを生じる
‘３１ 連通管の取付け及び取外し工程を要し、製作工
数が増加する。If this stress is applied to the iron core as it is, magnetostriction will occur in the iron core and the magnetization characteristics will change, making it impossible to obtain the originally designed characteristics. As a countermeasure, the area around the iron core is sealed with an insulator or the like. However, in this case, if the transformer body is molded by vacuum casting, the following problems arise. In other words, when the inside of the mold is evacuated and the synthetic resin is molded into an azusa mold, air remains in the insulating layer surrounding the iron ○, creating a relatively high pressure, which may cause the insulating layer to break down. . Therefore, the synthetic resin penetrates into the insulating layer, and as the synthetic resin hardens, the iron b'
This direct stress acts and magnetostriction occurs. On the other hand, as an improvement to make vacuum casting possible, an insulating layer surrounding the iron core may be provided with a pipe that connects to the outside of the mold. This is to prevent a pressure difference from occurring inside and outside the insulating layer by simultaneously evacuating the inside of the insulating layer via the pump when the inside of the mold is evacuated. Conventionally, this lotus tube was constructed by penetrating an insulating layer surrounding an iron core and a mold, and sealing each. A method is used in which the inside and outside of the insulating layer are evacuated, the synthetic resin is injected and hardened, the lotus tube is removed, and a highly viscous synthetic resin is injected into the warped hole, but this method has the following drawbacks. '1' Space is required within the mold to install the lotus tube, and the mold becomes larger, resulting in larger equipment.'21
The insulating layer of the communication pipe and the attachment part to the mold require sealing, and if the seal is incomplete, the synthetic resin may leak.'31 The process of installing and removing the communication pipe is required, increasing the number of manufacturing steps. .
本発明の目的は上記欠点を除去し、製作工数を増加した
り、機器を大形化することなく、簡単にしかも確実に密
封層内とモールド型外を蓬通させることのできる樹脂モ
ールド形変成器の製作法を提供するものである。The purpose of the present invention is to eliminate the above-mentioned drawbacks and to provide a resin mold shape modification that allows the inside of the sealing layer to pass through the outside of the mold easily and reliably without increasing the number of manufacturing steps or increasing the size of the equipment. It provides a method for making vessels.
以下本発明の一実施例を図面を参照して説明する。An embodiment of the present invention will be described below with reference to the drawings.
第１図は変成器本体の斜視図で、図中１−１′線矢視断
面図を第２図に示す。変成器本体は主として鉄心１及び
この鉄心１のレグ部１１に巻菱されたコイル３からなる
。コイル３はコイル巻枠２上に巻回されており、このコ
イル巻枠２とコイル巻枠２以外の鉄心部分を覆う被覆層
４とによって鉄心１の周囲を覆う密封層が形成されてい
る。コイル巻枠２と被覆層４の境界は両者を接合、接着
あるし、は融着することによって接合されている。また
コイル巻枠２及び密封層４は合成樹脂又は合成ゴムの成
形品で、絶縁材、半導電材あるいは導電材で構成する。
但し導電材を用いる場合には図示していないが鉄心１に
対し開回路による循環電流が流れないように絶縁物又な
半導電村により閉回路防止構造を施すことが必要である
。そして密封層を構成する被覆層４には少なくとも一部
にネジ部を有する貫通孔５１を設けた口金５を被覆層４
を貫通させて取付け、被福層４の内・外が通気できる状
態にする。又、この口金５は被覆層４に対し、十分シー
ルし、かつ固定して変成器本体を支持できるようにする
。第３図は上記のように構成した変成器本体をモールド
型６内に組込んだ状態を示す断面図であり第４図は第３
図の□−０′線矢視拡大断面図である。FIG. 1 is a perspective view of the transformer main body, and FIG. 2 is a sectional view taken along the line 1-1' in the figure. The main body of the transformer mainly consists of an iron core 1 and a coil 3 wound around a leg portion 11 of the iron core 1. The coil 3 is wound on a coil winding frame 2, and a sealing layer covering the periphery of the iron core 1 is formed by this coil winding frame 2 and a coating layer 4 that covers a portion of the iron core other than the coil winding frame 2. The boundary between the coil winding frame 2 and the coating layer 4 is joined by joining, adhering, or fusing the two. Further, the coil winding frame 2 and the sealing layer 4 are molded products of synthetic resin or synthetic rubber, and are made of an insulating material, a semiconductive material, or a conductive material.
However, when a conductive material is used, although not shown, it is necessary to provide a closed circuit prevention structure with an insulating material or a semiconductive layer to prevent circulating current from flowing through the iron core 1 due to an open circuit. A cap 5 having a through hole 51 having a threaded portion at least in part is attached to the covering layer 4 constituting the sealing layer.
is installed by penetrating it, so that the inside and outside of the blessed layer 4 can be ventilated. Further, the cap 5 is sufficiently sealed and fixed to the coating layer 4 so as to be able to support the transformer body. FIG. 3 is a sectional view showing a state in which the transformer main body configured as described above is assembled into the mold 6, and FIG.
It is an enlarged sectional view taken along the line □-0' in the figure.
モールド型６には下部に変成器本体固定用孔６１が、ま
た上部には樹脂注入口６２がそれぞれ設けられている。
変成器本体はモールド型６内において口金５を下方に向
けて収納、配置され、口金５の貫通孔５１のネジ部にモ
ールド型６の固定用孔６１を貫通させた固定ボルト７を
螺合して締付けることによってモールド型６に固定され
る。The mold 6 is provided with a hole 61 for fixing the transformer body in its lower part, and a resin injection port 62 in its upper part.
The transformer main body is housed and arranged in a mold 6 with the base 5 facing downward, and a fixing bolt 7 passed through a fixing hole 61 of the mold 6 is screwed into the threaded part of the through hole 51 of the base 5. It is fixed to the mold 6 by tightening it.
固定ボルト７には藤方向に貫通した蓮通孔７１が設けら
れているので、変成器本体が口金５及び固定ボルト７に
より固定されると、貫通孔５１及び蓮通孔７１を介して
密封層内がモールド型６外と蓮適することになる。そし
てモールド型６の樹脂注入口６２によりモールド型６内
部を真空脱気すると同時に口金５の貫通孔５１及び固定
ボルト７の蓮通孔７１を介して密封層内も真空脱気する
。これにより、モールド型６の内部と密封層の内部を同
じ真空度に保つことができるので、密封層が破層するこ
とはない。その後合成樹脂をモールド型６内へ真空注入
する。合成樹脂注入後モールド型６内を常圧に戻しても
密封層内も同時に常圧となるので、このときも密封層の
内、外に圧力差が生じて密封層が破損することはない。
従って注入した合成樹脂は密封層によってしや蔽され、
鉄心１内に浸入することがない。そして合成樹脂が一次
硬化した状態でモールド型６を雛型しその後合成樹脂を
完全硬化させ樹脂モールド変成器を完成させる。なお、
口金５は鉄心１の吸湿による発錆を防止するために合成
樹脂の一次硬化又は完全硬化後に貫通孔５１の一部又は
全部を粘度の高い樹脂や栓で密閉する。このようにすれ
ば、変成器本体をモールド型６内に固定する作業を行な
う際に、同時に密封層内とモールド型外を蓮通させるよ
うに構成できるので、製作工数を低減することができる
。Since the fixing bolt 7 is provided with a lotus through hole 71 that penetrates in the direction, when the transformer main body is fixed with the cap 5 and the fixing bolt 7, the sealing layer is inserted through the through hole 51 and the lotus hole 71. The inside will match the outside of the mold 6. Then, the inside of the mold 6 is vacuum evacuated through the resin injection port 62 of the mold 6, and at the same time, the inside of the sealing layer is also evacuated through the through hole 51 of the base 5 and the lotus through hole 71 of the fixing bolt 7. As a result, the inside of the mold 6 and the inside of the sealing layer can be maintained at the same degree of vacuum, so that the sealing layer does not rupture. Thereafter, synthetic resin is injected into the mold 6 under vacuum. Even if the inside of the mold 6 is returned to normal pressure after injection of the synthetic resin, the inside of the sealing layer also becomes normal pressure at the same time, so that there is no pressure difference between the inside and outside of the sealing layer and the sealing layer is not damaged.
Therefore, the injected synthetic resin is sealed by a sealing layer,
It does not penetrate into the iron core 1. Then, the mold 6 is used as a template in a state in which the synthetic resin is primarily cured, and then the synthetic resin is completely cured to complete the resin mold transformer. In addition,
In order to prevent the iron core 1 from rusting due to moisture absorption, the cap 5 seals part or all of the through hole 51 with a high viscosity resin or a plug after the synthetic resin is primarily cured or completely cured. In this way, when the transformer main body is fixed in the mold 6, the inside of the sealing layer and the outside of the mold can be passed through at the same time, so that the number of manufacturing steps can be reduced.
また変成器本体固定部以外に運通装置等の部品やスペー
スを余分に設ける必要がないので、モールド型６や機器
が小形化される。さらに鉄０１と口金５を電気的に後続
して同電位としておけば口金５を変成器本体の固定金具
として用いることができるので、鉄心１を接地するため
の装置も不要となる。また密封層を導電材あるいは半導
電材で構成すれば密封層内の空隙部を密封層により静電
シールドすることができ機器の小形化に効果がある。以
上説明のように本発明によれば、密封層内をモールド型
外と蓮通させる構成を、製作工数を増加させたり、機器
を大形化することなく、簡単、確実にできて、鉄心への
合成樹脂の浸入を阻止することができる樹脂モールド形
変成器の製作法を提供することができる。Furthermore, since there is no need to provide additional parts such as transportation equipment or extra space other than the transformer main body fixing part, the mold 6 and the equipment can be made smaller. Furthermore, if the iron 01 and the base 5 are electrically connected to each other and set at the same potential, the base 5 can be used as a fixing fitting for the transformer main body, so a device for grounding the iron core 1 is not required. Further, if the sealing layer is made of a conductive material or a semiconducting material, the gap in the sealing layer can be electrostatically shielded by the sealing layer, which is effective in downsizing the device. As explained above, according to the present invention, it is possible to easily and reliably create a configuration in which the inside of the sealing layer communicates with the outside of the mold without increasing the number of manufacturing steps or increasing the size of the equipment. It is possible to provide a method for manufacturing a resin mold type transformer that can prevent infiltration of synthetic resin.
第１図は本発明による樹脂モ−ルド形変成器の製作法で
用いる変成器本体の斜視図、第２図は第１図の１−１′
線失視断面図、第３図は本発明による樹脂モールド形変
成器の製作法における樹脂注入時の縦断面図、第４図は
第３図の０−ロ′線失視拡大断面図である。
１．．．鉄心、２・・・コイル巻枠、３・・・コイル、
４・・・被覆層、５・・・口金、６・・・モールド型、
７・・・固定ボルト。
第１図
第２図
第３図
第４図Figure 1 is a perspective view of the transformer body used in the method of manufacturing a resin mold type transformer according to the present invention, and Figure 2 is 1-1' in Figure 1.
FIG. 3 is a vertical cross-sectional view during resin injection in the manufacturing method of the resin mold type transformer according to the present invention, and FIG. 4 is an enlarged cross-sectional view of the line 0-RO' in FIG. 3. . 1. ．． ．． Iron core, 2... coil winding frame, 3... coil,
4... Covering layer, 5... Base, 6... Mold mold,
7...Fixing bolt. Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
イルを巻回してなる変成器本体をモールド型内に収納し
、前記密封層内及びモールド型内を真空脱気した後、前
記モールド型内に合成樹脂を注入し、硬化させる樹脂モ
ールド形変成器の製作法において、前記密封層に、少な
くとも一部にネジ部を有する貫通孔を設けた口金を貫通
させて取付けておき、前記変成器本体を前記モールド型
内に収納後、前記口金の貫通孔のネジ部に、連通孔を有
する固定ボルトを前記モールド型を貫通させて螺合し、
前記密封層内を真空脱気するときにこの固定ボルト及び
前記口金を利用して前記密封層内を真空脱気することを
特徴とする樹脂モールド形変成器の製作法。1. The transformer body, which is made by covering the iron core with a sealing layer and winding a coil outside the sealing layer, is housed in a mold, and after vacuum degassing inside the sealing layer and the mold, In a method of manufacturing a resin mold type transformer in which a synthetic resin is injected into a mold and hardened, a base having a through hole having at least a part of a threaded portion is attached to the sealing layer by penetrating it, and the base is attached to the sealing layer. After storing the container body in the mold, a fixing bolt having a communicating hole is passed through the mold and screwed into the threaded part of the through hole of the cap,
A method for manufacturing a resin mold type transformer, characterized in that the fixing bolt and the cap are used to evacuate the inside of the sealing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10259377A JPS6018135B2 (en) | 1977-08-29 | 1977-08-29 | Manufacturing method of resin mold type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10259377A JPS6018135B2 (en) | 1977-08-29 | 1977-08-29 | Manufacturing method of resin mold type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5436528A JPS5436528A (en) | 1979-03-17 |
| JPS6018135B2 true JPS6018135B2 (en) | 1985-05-09 |
Family
ID=14331525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10259377A Expired JPS6018135B2 (en) | 1977-08-29 | 1977-08-29 | Manufacturing method of resin mold type transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6018135B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0416612A (en) * | 1990-05-11 | 1992-01-21 | Shionome Block Kk | Landscape dam body and landscape block therefor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935269Y2 (en) * | 1980-10-02 | 1984-09-29 | ダイコク電機株式会社 | Centralized control device for pachinko game machines |
-
1977
- 1977-08-29 JP JP10259377A patent/JPS6018135B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0416612A (en) * | 1990-05-11 | 1992-01-21 | Shionome Block Kk | Landscape dam body and landscape block therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5436528A (en) | 1979-03-17 |
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