JPS6124763B2 - - Google Patents
Info
- Publication number
- JPS6124763B2 JPS6124763B2 JP55185993A JP18599380A JPS6124763B2 JP S6124763 B2 JPS6124763 B2 JP S6124763B2 JP 55185993 A JP55185993 A JP 55185993A JP 18599380 A JP18599380 A JP 18599380A JP S6124763 B2 JPS6124763 B2 JP S6124763B2
- Authority
- JP
- Japan
- Prior art keywords
- current transformer
- molding
- mold
- molded
- type current
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
- Transformers For Measuring Instruments (AREA)
- Organic Insulating Materials (AREA)
Description
【発明の詳細な説明】
この発明は、貫通形モールド変流器のモールド
方法の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a molding method for a through-type molded current transformer.
第１図はこの種の変流器の一例の断面図であつ
て、１は変流器本体、１ａは鉄心、１ｂはコイ
ル、２は端子、３はモールド部である。従来のモ
ールド方法では、ゴム系のモールド材をモールド
用金型にセツトし高圧プレスによつて変流器本体
１をモールドするようにしているがモールド材の
流動性が悪いため、通常は100Kg/cm2を越える圧力
をかけて上記モールドを行つている。この為、変
流器鉄心やコイルが変形しないように、変流器鉄
心の層厚、モールド部３の厚さ等を必要以上に厚
くして高い注入圧に耐え得るようにしなければな
らず、非常に経済性が悪い上、信頼性も低いとい
う欠点があつた。さらに、モールド用金型も大き
な耐圧を要する為に大型、高価なものとなり、ゴ
ム押出し装置やプレス等の高価な附帯設備を要す
る上、作業能率も良くなり為、上記不経済性と相
俟つて、製造コストが高くなるという欠点があつ
た。 FIG. 1 is a sectional view of an example of this type of current transformer, in which 1 is the current transformer main body, 1a is the iron core, 1b is the coil, 2 is the terminal, and 3 is the molded part. In the conventional molding method, a rubber-based molding material is set in a molding die and the current transformer body 1 is molded using a high-pressure press. However, due to the poor fluidity of the molding material, it is usually The above molding is performed under pressure exceeding cm 2 . Therefore, in order to prevent the current transformer core and coil from deforming, the layer thickness of the current transformer core and the thickness of the mold part 3 must be made thicker than necessary to withstand high injection pressure. The drawbacks were that it was extremely uneconomical and had low reliability. Furthermore, the molding die also requires a high pressure resistance, making it large and expensive, requiring expensive ancillary equipment such as rubber extrusion equipment and presses, and improving work efficiency, which combined with the uneconomical effects mentioned above. However, the disadvantage was that the manufacturing cost was high.
この発明は、上記した従来方法の欠点を除去す
る為になされたもので、モールド用金型に入れる
モールド材を流動性に優れかつ熱硬化性を有する
プリフオームされた複数の定形物とすることによ
り、従来に比して、製品の製造コストを大巾に低
減することができ、高い信頼性が得られる貫通形
変流器の簡易モールド方法を提供することを目的
とする。 This invention was made in order to eliminate the drawbacks of the above-mentioned conventional methods, and by using a plurality of preformed molding materials that have excellent fluidity and thermosetting properties to be placed in the molding die. It is an object of the present invention to provide a simple method for molding a through-type current transformer, which can greatly reduce the manufacturing cost of the product and provide high reliability compared to the conventional method.
以下、この発明の１実施例を図について説明す
る。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第２図に、この発明を実施するモールド工程を
示す。２１は真空撹拌装置、２２はモールド部３
の半体３ａをプリフオームする為のプリフオーム
用金形である。先づ、真空撹拌装置２１により、
後で例示する熱硬化性モールド材３０（融点130
℃前後、常温固体）を融点以上の温度で十分に真
空脱泡してプリフオーム用金型２２に注入した
後、室温まで冷却するのを待つて金型から取外
し、融点が上記温度範囲にあり常温固形、熱硬性
をもつモールド部上半体分及び下半体分を得る。 FIG. 2 shows a molding process for carrying out this invention. 21 is a vacuum stirring device, 22 is a mold part 3
This is a preform mold for preforming the half body 3a. First, by the vacuum stirring device 21,
Thermosetting molding material 30 (melting point 130
℃, solid at room temperature) is sufficiently degassed under vacuum at a temperature above its melting point and injected into the preform mold 22, wait until it cools to room temperature, and then remove it from the mold. A solid, thermosetting upper and lower mold part is obtained.
次に、この２つの定形物３０ａ，３０ａを弾性
体モールド材として、夫々モールド用金型の上型
２３ａ下型２３ｂに挿入し、その一方の弾性体モ
ールド材３０ａ内側に変流器本体１を入れた後、
型閉じをして弾性体モールド材３０ａ，３０ａを
合せ、両者を溶融させて一体化成形を行い、今度
は加熱硬化処理を施して第１図に示したようなモ
ールド変流器を得る。このようにしてモールドし
た変流器のモールド部は、モールド材としてゴム
系のものを用い、前記従来の方法により得たモー
ルド部のように弾性のある実用に耐え得るもので
あつた。 Next, these two shaped objects 30a, 30a are inserted as elastic molding materials into the upper mold 23a and the lower mold 23b of the molding die, respectively, and the current transformer main body 1 is placed inside one of the elastic molding materials 30a. After putting it in,
The mold is closed, the elastic molding materials 30a and 30a are combined, and the two are melted and integrally molded, followed by heat curing treatment to obtain a molded current transformer as shown in FIG. The molded part of the current transformer molded in this manner used a rubber-based molding material, and was elastic and durable for practical use like the molded part obtained by the conventional method.
特に本発明においては下記に述べるような組成
の熱硬化性弾性体が最も効果的である。 In particular, in the present invention, a thermosetting elastomer having the composition described below is most effective.
主剤にポリヒドロキシブタジエン重合体の水素
添加物を用いてその硬化剤としてヒマシ油１モル
に対し３―イソシアネートメチル―３，５，５―
トリメチルシクロヘキシルイソシアネート2.5〜
3.5モルを反応させたイソシアネートプレポリマ
ーを用いることにより本発明の効果を奏でるプリ
フオームされた熱硬化性弾性体を得ることができ
る。 A hydrogenated product of polyhydroxybutadiene polymer is used as the main ingredient, and 3-isocyanate methyl-3,5,5- is used as a hardening agent per mole of castor oil.
Trimethylcyclohexyl isocyanate 2.5~
By using an isocyanate prepolymer reacted with 3.5 moles, a preformed thermosetting elastomer exhibiting the effects of the present invention can be obtained.
該熱硬化性弾性体の配合比はポリヒドロキシブ
タジエン重合体の水素添加物の水酸基に対しイソ
シアネートプリポリマーのイソシアネート基が
NCO／OH＝0.8〜1.2の比率で配合された混合物
が好適である。 The blending ratio of the thermosetting elastomer is such that the isocyanate groups of the isocyanate prepolymer are mixed with the hydroxyl groups of the hydrogenated polyhydroxybutadiene polymer.
A mixture blended at a ratio of NCO/OH=0.8 to 1.2 is suitable.
以上のように、この発明によれば、モールド材
として熱硬化性のものを用い、一旦、変流器モー
ルド部の分割体形形状をなす複数の定形物を作
り、これらを、モールド用金型に入れる弾性体モ
ールド材とするようにしたことによつて、モール
ド材を従来のように高圧下でモールド用金型に注
入することなく変流器のモールドを行うことがで
き、上記定形物をモールド用金型に挿入して溶ゆ
う、熱硬化処理を施せばよいから、従来のような
モールド材注入圧による変流器鉄心やコイルの変
形の恐れがなくなり、鉄心層厚やモールド部の厚
さを任意に選ぶことができると共に製品の信頼性
を高めることができ、又モールド用金型も簡易な
もので十分であり高価な附帯設備を要しない上、
作業も単純化されるから、製品の製造コストを従
来に比して大巾に下げることができる。 As described above, according to the present invention, a thermosetting material is used as the molding material, and a plurality of regular shapes forming the divided body shape of the current transformer mold part are made, and these are placed in a molding die. By using an elastic molding material, it is possible to mold the current transformer without injecting the molding material into a molding die under high pressure as in the past, and the above fixed shape can be molded. Since the current transformer core and coil can be inserted into a mold and melted and heat-hardened, there is no need to worry about deformation of the current transformer core or coil due to mold material injection pressure, which is the case with conventional methods, and the thickness of the core layer and mold part can be adjusted. can be selected arbitrarily, and the reliability of the product can be improved.Also, a simple molding die is sufficient, and expensive incidental equipment is not required.
Since the work is simplified, the manufacturing cost of the product can be significantly reduced compared to the conventional method.
第１図は貫通形モールド変流器の一部断面側面
図、第２図はこの発明によるモールド方法を実施
するモールド工程図である。
図において、１…変流器本体、３…モールド
部、３ａ…モールド部半体、２１…真空撹拌装
置、２２…プリフオーム用金型、２３…モールド
用金型、３０ａ…弾性体モールド材。なお、図
中、同一符号は同一又は相当部分を示す。
FIG. 1 is a partially sectional side view of a through-type molded current transformer, and FIG. 2 is a molding process diagram for carrying out the molding method according to the present invention. In the figure, 1... Current transformer main body, 3... Mold part, 3a... Mold part half, 21... Vacuum stirrer, 22... Preform mold, 23... Mold mold, 30a... Elastic molding material. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
ポリヒドロキシブタジエン重合体の水素添加物と
ヒマシ油と一般式 （ただし式中R1、R2、R3は同じか異なり、そ
れぞれ炭素原子数が１〜３の低級アルキル基を示
し、ｎは１〜４の整数を示す）で示されるイソシ
アネート化合物を所定の形状にプリフオームして
なる複数個の熱硬化性弾性体材料と貫通形変流器
本体とを金型に配置し、加熱成形することを特徴
とする貫通形変流器の簡易モールド方法。[Claims] 1. A hydrogenated product of a polyhydroxybutadiene polymer that is solid at room temperature and has a melting point in the range of 40 to 130°C, castor oil, and the general formula (However, in the formula, R 1 , R 2 , and R 3 are the same or different, each represents a lower alkyl group having 1 to 3 carbon atoms, and n represents an integer of 1 to 4.) A simple method for molding a through-type current transformer, characterized in that a plurality of thermosetting elastic materials preformed into a shape and a through-type current transformer main body are arranged in a mold and heated and molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55185993A JPS57109316A (en) | 1980-12-26 | 1980-12-26 | Simplified molding method for penetrating type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55185993A JPS57109316A (en) | 1980-12-26 | 1980-12-26 | Simplified molding method for penetrating type current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57109316A JPS57109316A (en) | 1982-07-07 |
| JPS6124763B2 true JPS6124763B2 (en) | 1986-06-12 |
Family
ID=16180481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55185993A Granted JPS57109316A (en) | 1980-12-26 | 1980-12-26 | Simplified molding method for penetrating type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57109316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS638759U (en) * | 1986-07-04 | 1988-01-21 |
-
1980
- 1980-12-26 JP JP55185993A patent/JPS57109316A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS638759U (en) * | 1986-07-04 | 1988-01-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57109316A (en) | 1982-07-07 |
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