JP3285693B2 - Manufacturing method of cast molding - Google Patents

Manufacturing method of cast molding

Info

Publication number
JP3285693B2
JP3285693B2 JP1392694A JP1392694A JP3285693B2 JP 3285693 B2 JP3285693 B2 JP 3285693B2 JP 1392694 A JP1392694 A JP 1392694A JP 1392694 A JP1392694 A JP 1392694A JP 3285693 B2 JP3285693 B2 JP 3285693B2
Authority
JP
Japan
Prior art keywords
mold
resin
cast molded
casting
casting resin
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 - Fee Related
Application number
JP1392694A
Other languages
Japanese (ja)
Other versions
JPH07214576A (en
Inventor
美和 神野
敏夫 清水
治 多賀谷
勝 宮川
恭文 永田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP1392694A priority Critical patent/JP3285693B2/en
Publication of JPH07214576A publication Critical patent/JPH07214576A/en
Application granted granted Critical
Publication of JP3285693B2 publication Critical patent/JP3285693B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、例えば重電機器の導体
接続部などに使われるブッシングなどのような絶縁用の
注型成形品の製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a cast molded product for insulation such as a bushing used for a conductor connection portion of heavy electric equipment.

【0002】[0002]

【従来の技術】重電機器において、注型成形品は、絶縁
材料及び構造材料として多くの機器に用いられている。
注型成形品の成形材料には、耐湿性、耐薬性、寸法安定
性、電気的特性等に優れたエポキシ樹脂が多用され、ま
た、液状の樹脂を型に注入し、加熱硬化させ、所定の形
状に仕上げる注型による製造方法が採用されている。
2. Description of the Related Art In heavy electrical equipment, cast moldings are used in many equipments as insulating materials and structural materials.
Epoxy resin excellent in moisture resistance, chemical resistance, dimensional stability, electrical characteristics, etc. is frequently used as a molding material for cast molded products, and a liquid resin is injected into a mold, heated and cured, A manufacturing method by casting to finish the shape is adopted.

【0003】注入成形品の一例として注型で製造したブ
ッシング1の断面構造を図8に示す。導体2を心金とし
てこの導体2の外側に注型材料3が同軸に注型成形され
ている。また、箱体に取り付けるために複数の金属イン
サート4がフランジ部3aに埋め込まれている。このよ
うに、注型成形品は、内部に導体やインサートなどの金
属部品が埋設されたり、あるいは、沿面距離を増やすた
めに外側にひだを形成する等、複雑な形状のものが多
い。
FIG. 8 shows a cross-sectional structure of a bushing 1 manufactured by casting as an example of an injection molded product. A casting material 3 is coaxially cast outside the conductor 2 with the conductor 2 as a core. Further, a plurality of metal inserts 4 are embedded in the flange portion 3a to be attached to the box. As described above, many cast molded articles have a complicated shape, such as a metal part such as a conductor or an insert being buried inside, or a fold formed outside to increase the creepage distance.

【0004】このような注型成形品においては、成形後
の樹脂の品質を安定化するために、通常、一つの注型品
に用いられる材料は一種類で、部品の各位置で均一であ
ることが必要である。
In such a cast product, in order to stabilize the quality of the resin after molding, usually, one material used for one cast product is uniform and is uniform at each position of a part. It is necessary.

【0005】このような注型成形品は、内部と外部とで
は熱的,電気的,機械的,化学的等の条件の異なる環境
で使われる場合が多い。例えば、外面は、薬品,塵埃,
紫外線,オゾン,火炎,アーク,異物等に接触する環境
に設置される場合があり、これらのストレスから樹脂を
保護することが必要となる。一方、内側には、導体に流
れる電流によって発生した熱が伝達されて膨脹する。す
ると、金属導体とこの外側の注型樹脂との界面が剥離す
るおそれがあり、き裂が発生したり、耐コロナ特性が低
下するおそれがある。これを防ぐためには、金属導体が
注型樹脂と密着することが必要である。
[0005] Such a cast molded article is often used in an environment in which conditions such as thermal, electrical, mechanical, and chemical are different between the inside and the outside. For example, the outer surface is chemical, dust,
In some cases, it is installed in an environment where it comes into contact with ultraviolet rays, ozone, flames, arcs, foreign matter, etc., and it is necessary to protect the resin from these stresses. On the other hand, the heat generated by the current flowing through the conductor is transferred to the inside and expands. Then, there is a possibility that the interface between the metal conductor and the casting resin on the outer side may be peeled off, which may cause a crack or decrease the corona resistance. In order to prevent this, it is necessary that the metal conductor be in close contact with the casting resin.

【0006】このように内側と外側で要求される特性が
異なるにも係わらず、前述のように同一の注型材料で均
一に注型成形されるのが一般的である。例えば、通常、
注型材料は、シリカ粉末、アルミナ粉末などの無機質の
粉末が多量に充填されている。無機質は有機物の樹脂に
比べて硬く、摩耗,紫外線,オゾン,アーク,薬品,熱
などにも強く、安定している。これらの特徴は、注型成
形品としては、この注型成形品の表面に要求される特性
を満足する。
[0006] In spite of the difference in the required properties between the inside and the outside as described above, it is general that the same casting material is used for uniform casting as described above. For example, usually
The casting material is filled with a large amount of inorganic powder such as silica powder and alumina powder. Inorganic substances are harder than organic resins, and are resistant to abrasion, ultraviolet rays, ozone, arc, chemicals, heat, etc. and are stable. These characteristics satisfy the characteristics required for the surface of the cast molded article as the cast molded article.

【0007】また、無機質粉末を樹脂に充填した場合に
も充填量の増加に従い、この特徴が発揮される。しかし
ながら、粉末の充填量の増加は、粘度の著しい増加によ
って、注型時の作業製を低下させるので、実製品には、
ある程度以上混合することはできない。
[0007] Also, when the resin is filled with an inorganic powder, this characteristic is exhibited as the filling amount increases. However, an increase in the filling amount of the powder causes a decrease in work at the time of casting due to a significant increase in viscosity.
It cannot be mixed more than to some extent.

【0008】この問題を解決する一つの方法として、異
種材料による多段注型法がある。例えば、内側と外側を
仕切板で区切って、導体と接触する内側には接着性良好
な樹脂分の多い組成の材料を注入する。一方、外側に
は、耐環境性に優れた無機質粉末を多量に充填した材料
を注入する。注入脱泡後、仕切を取り除き、加熱硬化さ
せると、内側と外側での特性の異なる注型成形品を得る
ことができる。
As one method for solving this problem, there is a multi-stage casting method using different materials. For example, the inside and the outside are separated by a partition plate, and a material having a composition with a good resin content and good adhesiveness is injected into the inside in contact with the conductor. On the other hand, a material filled with a large amount of inorganic powder having excellent environmental resistance is injected into the outside. After the injection and defoaming, the partition is removed and cured by heating, so that a cast molded article having different properties between the inside and the outside can be obtained.

【0009】一方、エポキシ樹脂を用いた注型成形品で
は、図9に示すように、例えばブッシング1Bの表面
に、隣接した高圧充電部により生じる電界の集中を緩和
するための導電性塗料12を塗布している。塗布の際に
は、この塗装作業の前処理として、成形樹脂の表面にブ
ラスト処理等を施し、樹脂の表面と導電性塗装層12との
接着性の向上を図っている。また、ブッシング1Bがも
し屋外に使用されるときには、雨,雪,凍結,紫外線,
汚損物質等の環境要因による劣化を防ぐため、耐候性塗
料13を導電性塗装層上に重ねて塗装している。
On the other hand, in a cast molded product using an epoxy resin, as shown in FIG. 9, for example, a conductive paint 12 for alleviating the concentration of an electric field generated by an adjacent high-voltage charging section is provided on the surface of a bushing 1B. Coated. At the time of coating, as a pre-treatment of the coating operation, a blast treatment or the like is performed on the surface of the molding resin to improve the adhesiveness between the resin surface and the conductive coating layer 12. If the bushing 1B is used outdoors, rain, snow, freezing, ultraviolet light,
In order to prevent deterioration due to environmental factors such as fouling substances, the weather-resistant paint 13 is applied over the conductive paint layer.

【0010】[0010]

【発明が解決しようとする課題】ところが、前述した無
機質粉末を充填したときには、熱膨脹率が少なくなるの
で、充填量の差は二種類の材料の熱膨脹率の差となって
くる。その結果、仕切板の位置に存在する二種類の材料
の界面で大きなストレスが発生する。また、この界面は
接着力も低く、熱的,機械的,電気的に弱点部となりや
すい。
However, when the above-mentioned inorganic powder is filled, the coefficient of thermal expansion is reduced, so that the difference in the amount of filling becomes the difference between the coefficients of thermal expansion of the two materials. As a result, a large stress is generated at the interface between the two types of materials existing at the position of the partition plate. In addition, this interface has a low adhesive strength and is likely to be a thermally, mechanically, and electrically weak point.

【0011】以上のように従来の二段注型法では、注型
成形品の内部に新たに異種材料の界面を弱点部として形
成する結果となり、界面の剥離やき裂によるコロナ放電
が発生するおそれがあるので、現在までは実用化が困難
である。
As described above, in the conventional two-stage casting method, the interface of a different material is newly formed as a weak point inside the cast molded article, and corona discharge may occur due to peeling or cracking of the interface. Therefore, practical use is difficult until now.

【0012】一方、図9で示したようなブッシング1B
においては、導電性塗装層上に耐候性塗料を重ねて塗装
することもあり、さらに、これらの工程ごとにマスキン
グや乾燥を繰り返す必要があるので、作業工程が増え、
製作期間が長くなるだけでなく、これらに要する設備も
増える。
On the other hand, a bushing 1B as shown in FIG.
In some cases, weather-resistant paint may be applied over the conductive coating layer, and furthermore, masking and drying must be repeated for each of these steps.
Not only will the production period be lengthened, but the equipment required for these will also increase.

【0013】また、塗装のときには、成形品の外周面に
付着した離型剤を除去する作業も必要となり、そのため
に時間がかかるだけでなく、この離型剤が残ったときに
は、塗料の接着力が失われるので塗料が付着しなくなる
おそれもある。とくに、製品を屋外に設置した場合に
は、塗装層は環境にさらされて経時変化が促進されるた
め、特性の変化や劣化による浸食、剥離を生じるおそれ
があり、点検、補修あるいは再塗装を必要とするおそれ
もある。
[0013] Further, at the time of painting, it is necessary to remove the release agent attached to the outer peripheral surface of the molded article, which takes time. In addition, when the release agent remains, the adhesive strength of the paint is reduced. And the paint may not adhere. In particular, when the product is installed outdoors, the coating layer is exposed to the environment and changes over time are promoted.Therefore, erosion and peeling may occur due to change or deterioration in characteristics, and inspection, repair or repainting may be required. You may need it.

【0014】そこで、請求項1,2,3及び請求項4
記載の発明の目的は、物理的、化学的特性に優れた注型
成形品の製造方法を得ることであり、請求項5に記載の
発明の目的は、製造工程を短縮し、電界緩和層を容易に
形成することのできる注型成形品の製造方法を得ること
である。
[0014] It is an object of the invention described in claim 1, 2, 3 and claim 4 is to obtain physical, excellent cast product manufacturing method of the chemical properties, in claim 5 An object of the invention described is to provide a method for manufacturing a cast molded article capable of shortening a manufacturing process and easily forming an electric field relaxation layer.

【0015】[0015]

【課題を解決するための手段】請求項1に記載の発明
は、金型の内部に注型用樹脂を注入し硬化させる注型成
形品の製造方法において、金型の内部を複数に区画し、
この区画された金型の内部に、組成の異なる注型用樹脂
を注入し、区画間の遮蔽板を除去した後、金型を振動さ
せて組成の異なる前記注型用樹脂の界面を消去させる
型用樹脂を硬化させる注型成形品の製造方法である。ま
た、請求項2に記載の発明は、金型の内部に注型用樹脂
を注入し硬化させる注型成形品の製造方法において、金
型の内部を複数に区画し、この区画された金型の内部
に、無機質充填剤が混入された組成の異なる注型用樹脂
を注入し、区画間の遮蔽板を除去した後、金型を回転さ
せて注型用樹脂の無機質充填剤の混合比の勾配を形成し
て注型用樹脂を硬化させる注型成形品の製造方法であ
る。
According to a first aspect of the present invention, there is provided a method of manufacturing a cast molded article in which a casting resin is injected into a mold and cured, wherein the interior of the mold is divided into a plurality of sections. ,
After injecting a casting resin having a different composition into the divided molds and removing a shielding plate between the divided molds , the molds are vibrated.
This is a method for manufacturing a cast molded product in which the casting resin is cured to erase the interface between the casting resins having different compositions . In addition, the invention according to claim 2 provides a casting resin in a mold.
In the method of manufacturing a cast molded article in which
The inside of the mold is divided into multiple parts, and the inside of this divided mold
Casting resin with different composition mixed with inorganic filler
After injecting and removing the shield between the compartments, rotate the mold.
To form a gradient of the mixing ratio of the inorganic filler in the casting resin.
This is a method for manufacturing a cast molded product in which the casting resin is cured .

【0016】また、請求項3に記載の発明は、金型の内
部に注型用樹脂を注入し硬化させる注型成形品の製造方
法において、金型の内部を複数に区画し、この区画され
た金型の内部に、無機質充填剤が混入された組成の異な
る注型用樹脂を注入し、区画間の遮蔽板を除去した後、
金型を回転させて注型用樹脂の無機質充填剤の混合比の
勾配を形成し、その後金型を振動させて組成の異なる注
型用樹脂の界面を消去して注型用樹脂を硬化させる注型
成形品の製造方法である。また、請求項4に記載の発明
は、無機質充填剤をシリカ粉末としたことを特徴とする
請求項2または請求項3のいずれかに記載の注型成形品
の製造方法である。さらに、請求項5に記載の発明は、
金型の内部に注型用樹脂を注入し硬化させる注型成形品
の製造方法において、金型の内部を複数に区画し、この
区画された金型の内部の少なくとも一区画に、導電性の
注型樹脂を注入し、区画間の遮蔽板を除去した後、金型
を振動させて組成の異なる注型用樹脂の界面を消去させ
て注型樹脂を硬化させる注型成形品の製造方法である。
[0016] Further, the invention according to claim 3 is a mold according to the present invention .
How to make a cast molded product in which the casting resin is injected and cured
In the law, the inside of a mold is divided into
Inorganic filler mixed inside mold with different composition
After injecting casting resin to remove the shielding plate between compartments,
Rotate the mold and adjust the mixing ratio of the inorganic filler in the casting resin.
A gradient is formed, and then the mold is vibrated to mix
Casting that erases the interface of the mold resin and cures the mold resin
This is a method for manufacturing a molded article . The invention of claim 4 is characterized in that the inorganic filler was silica powder
A cast molded product according to claim 2 or claim 3.
It is a manufacturing method of. Further, the invention according to claim 5 is:
In a method of manufacturing a cast molded product in which a casting resin is injected into a mold and cured, the inside of the mold is divided into a plurality of sections, and at least one section inside the sectioned mold has a conductive property. After injecting the casting resin and removing the shielding plate between the sections, the mold is vibrated to erase the interface of the casting resin having a different composition, and the casting resin is cured so that the casting resin is cured. is there.

【0017】[0017]

【作用】請求項1,2および請求項3に記載の発明にお
いては、注型成形品の樹脂層の各部位には、この各部位
の使用条件に応じた組成の樹脂層が形成される。また、
請求項2,3に記載の発明においては、注型成形品の樹
脂層の一部には、この一部にかかる使用環境に応じた無
機充填剤を含む樹脂層が形成される。
According to the first, second and third aspects of the present invention, a resin layer having a composition corresponding to the use conditions of each of the portions is formed at each portion of the resin layer of the cast molded article. Also,
According to the second and third aspects of the present invention, a resin layer containing an inorganic filler corresponding to the use environment is formed on a part of the resin layer of the cast molded article.

【0018】また、請求項4に記載の発明においては、
注型成形品の樹脂層の一部には、この一部にかかる使用
環境に応じたシリカ粉末を含む樹脂層が形成される。さ
らに、請求項5に記載の発明においては、注型成形品の
樹脂層の一部には、注型成形品にかかる電界を緩和する
導電性の樹脂層が形成される。
Further, in the invention according to claim 4 ,
On a part of the resin layer of the cast molded product, a resin layer containing silica powder corresponding to the use environment according to the part is formed. Further, in the invention according to claim 5 , a conductive resin layer for relaxing an electric field applied to the cast molded product is formed on a part of the resin layer of the cast molded product.

【0019】[0019]

【実施例】以下、図面を用いて請求項1,2,3及び請
求項4に記載の発明の注型成形品の製造方法の一実施例
を説明する。まず、エポキシ注型樹脂(例えば、ビスフ
ェノール系固形樹脂、CT200 、チバ・ガイキー社の商品
名)と硬化材(例えば、酸無水物系硬化剤、HT903 、チ
バ・ガイキー社の商品名)を基材として、これに無機質
の粉末充填剤(例えば、電気絶縁用シリカ粉末、A1、株
式会社龍森の商品名)の充填量を変えた2種類の材料
(例えば、259phrと350phr)を用意する。
BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the method for producing a cast molded product of the invention according to claim 4 will be described. First, an epoxy casting resin (for example, bisphenol-based solid resin, CT200, trade name of Ciba-Gaykey) and a curing material (for example, acid anhydride-based curing agent, HT903, trade name of Ciba-Gaykey) are used as base materials. Two kinds of materials (for example, 259 phr and 350 phr) are prepared by changing the amount of the inorganic powder filler (for example, silica powder for electrical insulation, A1, trade name of Tatsumori Co., Ltd.).

【0020】図1に示すように、このようにして調整し
た充填剤5の濃度の異なる注型材料を用い、中間部を仕
切板6で区画した金型7の内側の片側に低充填注型材料
8(250phr)を、他側に高充填注型材料9(350phr)を
充填する。充填後は、真空脱泡を行った後、仕切板6を
取り除く。この状態では、仕切板6が挿入されていた位
置に充填剤濃度の急激な差が存在し、特性上の界面が形
成されることになる。
As shown in FIG. 1, a casting material having a different concentration of the filler 5 adjusted as described above is used, and a low filling casting is performed on one side inside a mold 7 having an intermediate portion partitioned by a partition plate 6. Material 8 (250 phr) is filled on the other side with highly filled casting material 9 (350 phr). After filling, the partition plate 6 is removed after performing vacuum defoaming. In this state, there is a sharp difference in the filler concentration at the position where the partition plate 6 has been inserted, and an interface in terms of characteristics is formed.

【0021】そこで、金型7に密栓を付け、樹脂が外部
に流れ出さないようにして、遠心分離機に載せて、回転
する。場合によっては、その後加振機に搭載して、振動
を加える。樹脂は当初は液体状であるので、この回転又
は振動により、金型内で2種類の材料が移動し、混合す
る。
Then, the mold 7 is sealed and the resin is put on a centrifugal separator and rotated so that the resin does not flow outside. In some cases, it is then mounted on a shaker to apply vibration. Since the resin is initially in a liquid state, the rotation or vibration causes the two materials to move and mix in the mold.

【0022】すなわち、比重の大きい無機質充填剤は、
回転による遠心力により、金型7の外側に移動する。そ
の結果、充填剤の濃度には、外側が高く、内側が低くな
る充填剤の混合比の勾配が形成される。また、振動によ
り2種類の材料がお互いに混合し、徐々に界面が消失す
る。この状態で加熱し、樹脂を硬化させる。樹脂がゲル
化し、半固体状態になるまで振動を続ける。
That is, the inorganic filler having a large specific gravity is
Due to the centrifugal force due to the rotation, it moves outside the mold 7. As a result, a gradient of the mixture ratio of the filler is formed such that the outside is high and the inside is low in the concentration of the filler. Further, the two materials are mixed with each other by the vibration, and the interface gradually disappears. Heat is applied in this state to cure the resin. Continue to vibrate until the resin gels to a semi-solid state.

【0023】硬化後の注型成形品には、図2の部分拡大
図に示すように、絶縁樹脂10の中に充填剤5の濃度の傾
斜が形成され、仕切による境界面が完全に消滅する。充
填剤5を混入すると、一般的に特性は複合則に従って変
化する。すなわち、耐アーク性,耐薬品性,耐紫外線
性,耐摩耗性は、外側の充填剤濃度の高い部分が良好な
特性を示す。逆に充填剤濃度の低い内側は、金属材料の
導体と良好な接着性を維持する。
As shown in the partially enlarged view of FIG. 2, in the cast molded product after curing, the gradient of the concentration of the filler 5 is formed in the insulating resin 10, and the boundary surface due to the partition disappears completely. . When the filler 5 is mixed, the properties generally change according to the compound rule. In other words, the arc resistance, chemical resistance, ultraviolet light resistance, and abrasion resistance show good characteristics in the portion where the filler concentration is high on the outside. Conversely, the inside with a low filler concentration maintains good adhesion to the conductor of the metallic material.

【0024】発明者らは、このようにして図3の縦断面
図に示すようなブッシング1を注型した。外側から10mm
の位置までは高充填注型材料9(シリカ粉末350phr)、
それよりも内側には通常の低充填注型材料8(同250ph
r)を注入し、真空脱泡後、仕切板6を除去し、密栓し
て金型7に 300回転/分で回転しながら一次硬化させ
た。ゲル化する前に回転から振動に移行した。
The inventors cast a bushing 1 as shown in the longitudinal sectional view of FIG. 10mm from outside
Up to the position of high filling casting material 9 (silica powder 350phr),
Inside, a normal low-fill casting material 8 (250ph
r) was injected, and after degassing in vacuo, the partition plate 6 was removed, sealed, and primary cured while rotating in a mold 7 at 300 rpm. The transition from rotation to vibration occurred before gelling.

【0025】ゲル化以降は、充填剤の所定の位置に固定
され、移動を防ぐことができるため、回転・振動の効果
は消失する。その後、一次硬化、離型、二次効果は、通
常通り実施した。
After the gelling, the filler is fixed at a predetermined position and can be prevented from moving, so that the effects of rotation and vibration disappear. Thereafter, primary curing, release, and secondary effects were performed as usual.

【0026】回転させながら注型したブッシングの厚さ
方向の充填剤の濃度を図4のグラフに示す。充填剤の濃
度は、所定の位置で試験片を機械加工により切り出し、
加熱し有機分を除去した後残留重量から算出した。その
結果、充填剤の濃度は、内側から表面に向かって、徐々
に高くなっていくる。特に、表面付近は、高充填量(40
0phr以上)で無機質のシリカ粉末の分布が密になってい
る。通常250phr程度の充填量が標準であり、高充填は材
料の粘度が著しく増大し、注入・脱泡が困難となるの
で、注型作業には用いられていない。本発明の注型成形
品の製造方法では、注入・脱泡後に回転させることによ
り、作業性を損なうことなく、部分的な高充填を可能に
したものである。
FIG. 4 is a graph showing the concentration of the filler in the thickness direction of the bushing cast while rotating. For the concentration of the filler, cut out the test piece by machining at the predetermined position,
It was calculated from the residual weight after heating to remove organic components. As a result, the concentration of the filler gradually increases from the inside toward the surface. In particular, near the surface, high filling (40
(0 phr or more), the distribution of the inorganic silica powder is dense. Normally, a filling amount of about 250 phr is standard, and high filling is not used for casting work because the viscosity of the material is significantly increased and injection and defoaming become difficult. In the method for producing a cast molded article of the present invention, by rotating after pouring and defoaming, partial high filling is enabled without impairing workability.

【0027】また、本発明の樹脂形成品の充填材の濃度
の変化は連続的であり、表面から10mmの位置にあった仕
切りの界面は消失してる。界面の消失だけを目的とする
場合には、回転ではなく振動だけとしてもよい。
The change in the concentration of the filler in the resin-formed article of the present invention is continuous, and the interface of the partition located 10 mm from the surface has disappeared. When the purpose is only to eliminate the interface, only the vibration may be used instead of the rotation.

【0028】このように、二段注型と回転・振動を併用
した本発明の注型成形品の製造方法で注型したブッシン
グと二段注型で回転・振動を付与しなかったブッシング
(シリカ粉末充填剤:外側350phr、内側250phr)、及び
従来の一体注型法によるブッシング(同充填剤:250phr
一定)に対し特性の比較評価を行った。外側表面の各種
特性の試験結果を表1に示す。
As described above, the bushing cast by the method of manufacturing a cast molded article of the present invention using both the two-stage casting and the rotation / vibration is the same as the bushing (silica) without the rotation / vibration applied by the two-stage casting. Powder filler: 350 phr outside, 250 phr inside, and bushing by the conventional one-piece casting method (the same filler: 250 phr)
(Constant) and comparative evaluation of characteristics was performed. Table 1 shows the test results of various properties of the outer surface.

【0029】[0029]

【表1】 [Table 1]

【0030】表1に示すように、耐トラッキング性、耐
アーク性、耐候性試験(ウェザオメータ試験後の表面粗
さ)等の結果は、いずれも以下の順位で、本発明品の樹
脂成形品が優れた特性を示した。
As shown in Table 1, the results of the tracking resistance, arc resistance, weather resistance test (surface roughness after weatherometer test) and the like are all in the following order. It showed excellent properties.

【0031】本発明品>二段注型品>従来品 これにより、表面に高充填したシリカ粉末の効果が確認
された。また、信頼性を評価するために、0℃・1時
間、 100℃・1時間の液相ヒートサイクル試験を10回行
い、外観を確認した。その結果、従来の方法で製作した
ブッシングでは、5サイクル課した後に、表面に達する
き裂が確認された。一方、本発明によるブッシング、及
び、二段注型法によるブッシングは、10サイクル課した
後においても、き裂の発生は認められなかった。
The product of the present invention> two-stage cast product> conventional product The effect of the silica powder highly filled on the surface was confirmed. In addition, in order to evaluate the reliability, a liquid phase heat cycle test was performed 10 times at 0 ° C. for 1 hour and at 100 ° C. for 1 hour, and the appearance was confirmed. As a result, in the bushing manufactured by the conventional method, a crack reaching the surface was observed after 5 cycles. On the other hand, in the bushing according to the present invention and the bushing according to the two-step casting method, no crack was observed even after 10 cycles.

【0032】さらに、部分放電試験を行った。コロナ発
生開始の放電電荷量を10pCとして、パルス発生頻度 50p
psで交流を印加した場合、本発明によるブッシングは、
40kVで、放電電荷量は10pC未満で、初期の特性
を維持した。これに対し、二段注型法だけによるものの
コロナ開始電圧は、同一条件で、14kVまで低下した。こ
の結果、本発明品が従来品、あるいは単純な二段注型品
に比べて、熱的、機械的、電気的特性に優れ、信頼性に
富むことが実験的に証明された。
Further, a partial discharge test was performed. Pulse discharge frequency 50p, with discharge charge at the start of corona generation being 10pC
When an alternating current is applied at ps, the bushing according to the invention is:
At 40 kV, the discharge charge was less than 10 pC, maintaining the initial properties. On the other hand, the corona onset voltage was reduced to 14 kV under the same conditions although only the two-step casting method was used. As a result, it has been experimentally proved that the product of the present invention is superior in thermal, mechanical and electrical properties and has higher reliability than the conventional product or a simple two-stage cast product.

【0033】以上は、無機質の充填剤の濃度を変えた例
で説明したが、樹脂側の成分を変えてもよい。例えば、
屋外で使用する注型成形品の場合、耐候性のよいシクロ
系のエポキシ樹脂が効果的であるが、耐クラック性をは
じめとする機械的特性の観点からは、通常のビスフェノ
ール系のエポキシ樹脂の方が優れている。
Although the above description has been made with reference to an example in which the concentration of the inorganic filler is changed, the components on the resin side may be changed. For example,
In the case of cast molded products used outdoors, a cycloepoxy resin with good weather resistance is effective, but from the viewpoint of mechanical properties such as crack resistance, ordinary bisphenol epoxy resin is effective. Is better.

【0034】そこで、導体界面等熱膨脹率の差異から大
きな熱応力を発生し、剥離・き裂が発生しやすい内側に
は、ビスフェノール系エポキシ樹脂(例えばCT 200、チ
バ・ガイキー社の商品名)を用い、外側には、耐候性の
優れたシクロ系エポキシ樹脂(例えばCY 175、チバ・ガ
イギー社の商品名)を用いて二段注型する。
Therefore, a bisphenol-based epoxy resin (for example, CT200, trade name of Ciba-Gaiky) is applied on the inner side where a large thermal stress is generated due to the difference in thermal expansion coefficient at the conductor interface and the like, where peeling and cracking are likely to occur. On the outside, two-step casting is performed using a cycloepoxy resin having excellent weather resistance (for example, CY175, trade name of Ciba-Geigy).

【0035】両者の界面は新たな弱点部となるので、脱
泡後、仕切板を除去し、ゲル化まで回転と振動を与えな
がら硬化させる。振動により二種類の材料は、混合し
て、界面は消失する。完成した注型成形品は、屋外仕様
であるが、機械的・電気的特性にも優れ、信頼性を上げ
ることができる。
Since the interface between the two becomes a new weak point, after the defoaming, the partition plate is removed and cured while applying rotation and vibration until gelation. The two materials are mixed by vibration and the interface disappears. The finished cast product is for outdoor use, but also has excellent mechanical and electrical properties and can improve reliability.

【0036】なお、上記実施例では、金型を区画する仕
切板は、1枚のときで説明したが、2枚でも3枚でもよ
い。仕切板を増やすことによって、区画を増やし回転時
間を短縮することができる。
In the above embodiment, the case where the number of the partition plates for partitioning the mold is one has been described. However, two or three partition plates may be used. By increasing the number of partitions, the number of partitions can be increased and the rotation time can be reduced.

【0037】このように、仕切板等で金型内を分割し、
分割した内部にそれぞれ組成の異なる樹脂を注入し、仕
切を取り去った後にゲル化まで回転や振動を与えながら
硬化させた注型成形品は、内部に特性の連続的な傾斜を
付与することができる。さらに、ゲル化まで振動を加え
ることにより、多段注型法における最大の弱点である異
種注型材料間の界面を消失させることができる。
As described above, the inside of the mold is divided by the partition plate or the like,
A resin with different composition is injected into the divided interior, and after the partition is removed, the cast molded product cured while applying rotation or vibration until gelation can give a continuous gradient of characteristics to the interior. . Furthermore, by applying vibration until gelation, the interface between different types of casting materials, which is the greatest weak point in the multi-stage casting method, can be eliminated.

【0038】シリカ、アルミナ等の無機質の充填剤は、
樹脂よりも比重が大きいため、回転の遠心力により外側
に移動し、外側表面の耐アーク性、耐トラッキング性、
耐候性等を高め、注型成形品としての性能を高めること
ができる。また、内側と外側で樹脂側の組成を変えるこ
とにより、それぞれの樹脂の特性を生かすことができ、
耐環境特性面で最大の硬化を発揮させることができる。
Inorganic fillers such as silica and alumina are
Since the specific gravity is higher than resin, it moves outward due to the centrifugal force of rotation, and the outer surface has arc resistance, tracking resistance,
The weather resistance and the like can be enhanced, and the performance as a cast molded product can be enhanced. Also, by changing the composition of the resin side inside and outside, it is possible to take advantage of the characteristics of each resin,
It can exhibit maximum curing in terms of environmental resistance.

【0039】これらの材料、注型法から作製された注型
成形品は、仕様環境に対応した熱的、機械的、電気的特
性等を発揮させることができ、機器の寿命を延ばし、保
守点検間隔を延ばすことができる。
Casting products made from these materials and casting methods can exhibit thermal, mechanical, electrical properties, etc. corresponding to the specified environment, extend the life of the equipment, and maintain and inspect it. The interval can be extended.

【0040】次に、請求項5に記載の発明の一実施例を
説明する。エポキシ注型樹脂(例えば、ビスフェノール
系固形樹脂、CY 255、チバ・ガイキー社の商品名)と硬
化剤(例えば酸無水物系硬化剤、HY 925、チバ・ガイキ
ー社の商品名)をベースとして、シリカ充填剤(例え
ば、電気絶縁用シリカ粉末、A1,株式会社龍森の商品
名)、導電性充填剤(例えば、カーボンパウダー)を充
てんする。
Next, a description will be given of an embodiment of the invention described in claim 5. Based on epoxy casting resin (for example, bisphenol-based solid resin, CY 255, trade name of Ciba-Gaykey) and curing agent (for example, acid anhydride-based curing agent, HY925, trade name of Ciba-Gaykey), A silica filler (for example, silica powder for electrical insulation, A1, trade name of Tatsumori Co., Ltd.) and a conductive filler (for example, carbon powder) are filled.

【0041】図5に示すように、導電性充填剤6を30ph
r(per handred of resin by weight) 加えた注型材料14
を耐熱容器11Aを用いて、仕切板6Aで区切った金型7
Aの左側に注入する。次に、シリカ充填剤13を250phr加
えた注型材料を同様に仕切板6Aの右側に注入する。注
入完了後、仕切板6Aを取り除くと界面は消滅して、樹
脂は一方から他方へ連続したマトリックスになる。この
際に振動を与えると、界面が混合し、更に効果的であ
る。次に、所定の条件で加熱して硬化させる。
As shown in FIG. 5, the conductive filler 6
r (per handred of resin by weight) Cast material added 14
Using a heat-resistant container 11A and a mold 7 separated by a partition plate 6A.
Inject on the left side of A. Next, a casting material to which 250 phr of silica filler 13 has been added is similarly injected into the right side of the partition plate 6A. After the completion of the injection, when the partition plate 6A is removed, the interface disappears, and the resin becomes a continuous matrix from one side to the other side. When vibration is applied at this time, the interface is mixed, which is more effective. Next, it is cured by heating under predetermined conditions.

【0042】硬化後の注型成形品には、成形樹脂の部分
拡大断面図を示す図6に示すように、樹脂10A中の片側
に導電性充填剤12を含む導電層が形成される。これによ
り界面を形成することなく、導電性部を備えた注型成形
品が得られる。
As shown in FIG. 6, which shows a partially enlarged cross-sectional view of the molding resin, a conductive layer containing a conductive filler 12 is formed on one side of the resin 10A. Thus, a cast molded article having a conductive portion can be obtained without forming an interface.

【0043】このようにすると、同じCY225 樹脂をマト
リックスとする材料を同時に硬化させることができるの
で、導電性領域と非導電性領域との境界面は完全に混合
し、明確な界面が消滅する。このため、導電性充填剤が
混入された導電性領域と、充填剤としてシリカが混入さ
れた非導電性領域との硬化収縮による境界面での剥離
や、両者の熱膨脹率の違いによる剥離等のおそれを解消
することができる。
In this way, since the same material having the same CY225 resin as the matrix can be cured at the same time, the boundary surface between the conductive region and the non-conductive region is completely mixed, and a clear interface disappears. For this reason, peeling at the boundary surface due to curing shrinkage between the conductive region in which the conductive filler is mixed and the non-conductive region in which silica is mixed as the filler, and peeling due to a difference in the coefficient of thermal expansion between the two. The fear can be eliminated.

【0044】また、同じCY225 マトリックスを用いてい
るため、硬化条件を同一にでき、導電領域と非導電領域
との硬化を同時に行うことができる。以上の結果、製造
工程の省力化を図り、施行後の補修を必要としない長期
信頼性の高い注型成形品を得ることができる。
Since the same CY225 matrix is used, the curing conditions can be made the same, and the curing of the conductive region and the non-conductive region can be performed simultaneously. As a result, it is possible to save the labor of the manufacturing process and to obtain a cast molded article having high long-term reliability that does not require repair after implementation.

【0045】上述した製造方法によって、導電性部、耐
候性部ともに樹脂中に含まれるのでブラスト研削工程等
を削除することが可能となり、注型成形品を製造する工
程が大幅に短縮される。また、マトリックス中に塗装層
が備わるので、導電特性のばらつきが改善され、かつ界
面が存在しなくなり機械強度が向上する。さらに経時変
化やヒートサイクルにより、注型成形品が屋外環境から
受けるさまざまな劣化、例えば塗装不良や剥離に対し効
果が得られる。
According to the above-described manufacturing method, since both the conductive portion and the weather-resistant portion are contained in the resin, the blast grinding step and the like can be omitted, and the process of manufacturing a cast molded product can be greatly shortened. In addition, since the coating layer is provided in the matrix, the dispersion of the conductive properties is improved, and the interface is eliminated so that the mechanical strength is improved. Further, due to aging or heat cycle, the cast molded article is effective against various deteriorations, such as defective coating and peeling, which are received from the outdoor environment.

【0046】実施例の効果についてブッシング断面図を
示した図7を参照して説明する。本発明によるブッシン
グと従来の一体注型法によるブッシングに対し0℃・1
時間、 100℃・1時間の液層ヒートサイクル試験を10回
行い、き裂発生の有無を確認した。その結果、従来法に
よるブッシングでは、5サイクル課した後に表面にき裂
が確認されたが、本発明によるブッシングは、10サイク
ル課した後も、き裂の発生は認められなかった。
The effect of the embodiment will be described with reference to FIG. 0 ° C./1 for the bushing according to the present invention and the bushing according to the conventional casting method
A liquid layer heat cycle test was performed 10 times at 100 ° C. for 1 hour, and the occurrence of cracks was confirmed. As a result, in the bushing according to the conventional method, a crack was confirmed on the surface after imposing 5 cycles, but in the bushing according to the present invention, no crack was observed even after imposing 10 cycles.

【0047】さらに、部分放電試験を行った。コロナ発
生開始の放電電荷量を10pCとて、パルス発生頻度 50pps
で交流を印可した場合、本発明によるブッシングは40kV
で発生したコロナの電荷量は10pC未満であった。また、
電気抵抗値も、1Ω・cmと初期特性を維持した。以上
より、本発明品が従来品と比べて、熱的,機械的,電機
的に優れ、信頼性に富むことが実験的に確認された。
Further, a partial discharge test was performed. Pulse generation frequency 50pps with the discharge charge amount at the start of corona generation as 10pC
When the AC is applied, the bushing according to the present invention is 40 kV
The charge of the corona generated in was less than 10 pC. Also,
The electric resistance value also maintained the initial characteristics of 1 Ω · cm. From the above, it was experimentally confirmed that the product of the present invention is superior in thermal, mechanical and electrical properties and has high reliability compared to the conventional product.

【0048】前述したように、多くの注型成形品は、内
部に金属インサートを備えており、機械の運転停止時に
伴う内側と外側の温度変化と熱膨脹率の差異により、樹
脂と金属界面に大きな熱応力が発生し、界面の剥離や靭
性の低いエポキシ樹脂中にき裂を発生しやすい。このよ
うに、エポキシ樹脂と金属が何らかの原因により一部が
剥離してもコロナが発生しないように、金属表面には導
電塗料が塗布されている。
As described above, many cast moldings have a metal insert inside, and a large temperature difference between the inside and the outside and the difference in the coefficient of thermal expansion caused when the operation of the machine is stopped cause a large difference between the resin and the metal interface. Thermal stress is generated, and cracks are easily generated in the interface resin and epoxy resin having low toughness. As described above, a conductive paint is applied to the metal surface so that the corona does not occur even if the epoxy resin and the metal are partially peeled off for some reason.

【0049】即ち、導電塗料は金属よりもエポキシ樹脂
への接着特性がよいので、剥離が生じた場合、導電塗料
はエポキシ樹脂の方に接着しており、金属に電圧が印加
されても剥離した空間は金属中に存在することと同じこ
とになり、コロナ放電の発生はない。
That is, since the conductive paint has a better adhesive property to the epoxy resin than the metal, when the peeling occurs, the conductive paint adheres to the epoxy resin and peels off even when a voltage is applied to the metal. The space is the same as existing in metal, and no corona discharge occurs.

【0050】そこで、本発明の注型成形品の製造方法を
図7に示すように樹脂と金属の界面に用いることによ
り、より優れた注型成形品を得ることができる。以上の
ように、本発明により、仕切板等で金型内に分割し、こ
れに、同一の樹脂組成で特性を替えたものを順次注入
し、仕切板を取り去った後に同時に硬化せしめた注型成
形品は、内部に特性の連続的な傾斜を付与することが可
能である。
Therefore, by using the method for producing a cast molded product of the present invention at the interface between a resin and a metal as shown in FIG. 7, a more excellent cast molded product can be obtained. As described above, according to the present invention, the mold is divided into molds by a partition plate or the like, and the same resin composition having different characteristics is sequentially injected into the mold, and the partition plate is removed and then simultaneously cured. The molded article can have a continuous gradient of properties inside.

【0051】また、これは、ブラスト研削や塗装過程を
省略することにより、大幅な省力化を図ることができ、
熱的,機械的,電機的に優れ、信頼性の高い塗装層を備
えた注型成形品を提供することができる。
Further, by omitting the blast grinding and the painting process, it is possible to save a great deal of labor.
It is possible to provide a cast molded product having a highly reliable coating layer that is excellent in thermal, mechanical, and electrical properties.

【0052】以上、請求項1に記載の発明によれば、金
型の内部に注型用樹脂を注入し硬化させる注型成形品の
製造方法において、金型の内部を複数に区画し、この区
画された金型の内部に、組成の異なる注型用樹脂を注入
し、区画間の遮蔽板を除去した後、金型を振動させて組
成の異なる注型用樹脂の界面を消去させて注型用樹脂を
硬化させることで、注型成形品の樹脂層の各部位には、
この各部位の使用条件に応じた組成の樹脂層を形成した
ので、物理的,化学的特性に優れた注型成形品の製造方
法を得ることができる。
As described above, according to the first aspect of the present invention, in a method of manufacturing a cast molded product in which a casting resin is injected into a mold and cured, the inside of the mold is divided into a plurality of sections. After injecting a casting resin having a different composition into the divided molds and removing a shielding plate between the sections, the mold is vibrated to assemble the molds.
By erasing the interface of the casting resin of different composition and curing the casting resin, each part of the resin layer of the cast molded product has:
Since a resin layer having a composition corresponding to the use conditions of each part is formed, it is possible to obtain a method for manufacturing a cast molded article having excellent physical and chemical properties.

【0053】また、請求項2に記載の発明によれば、
型の内部に注型用樹脂を注入し硬化させる注型成形品の
製造方法において、金型の内部を複数に区画し、この区
画された金型の内部に、無機質充填剤が混入された組成
の異なる注型用樹脂を注入し、区画間の遮蔽板を除去し
た後、金型を回転させて注型用樹脂の無機質充填剤の混
合比の勾配を形成して注型用樹脂を硬化させることで、
注型成形品の樹脂層の各部位には、この各部位の使用条
件に応じた組成の樹脂層を形成したので、物理的,化学
的特性に優れた注型成形品の製造方法を得ることができ
る。また、注型用樹脂の組成として、無機質充填剤が混
入された絶縁樹脂を用いることで、注型成形品の樹脂層
の一部には、この一部にかかる使用環境に応じた無機充
填剤を含む樹脂層を形成したので、物理的,化学的特性
に優れた注型成形品の製造方法を得ることができる。
According to the second aspect of the present invention, gold
Injection molding resin is injected into the mold and cured.
In the manufacturing method, the inside of the mold is divided into
Composition with inorganic filler mixed inside the defined mold
Injection of different casting resins and removal of shielding plates between compartments
Then, rotate the mold to mix the inorganic filler in the casting resin.
By forming a gradient of the mixing ratio and curing the casting resin,
Each part of the resin layer of the cast molding has
Because a resin layer with the composition according to the case was formed, physical and chemical
Production method for cast molded products with excellent mechanical properties
You. In addition, by using an insulating resin mixed with an inorganic filler as a composition of the casting resin, a part of the resin layer of the cast molded product has an inorganic filler according to the use environment related to the part. Since the resin layer containing is formed, it is possible to obtain a method of manufacturing a cast molded article having excellent physical and chemical properties.

【0054】また、請求項3に記載の発明によれば、
型の内部に注型用樹脂を注入し硬化させる注型成形品の
製造方法において、金型の内部を複数に区画し、この区
画された金型の内部に、無機質充填剤が混入された組成
の異なる注型用樹脂を注入し、区画間の遮蔽板を除去し
た後、金型を回転させて注型用樹脂の無機質充填剤の混
合比の勾配を形成し、その後前記金型を振動させて組成
の異なる注型用樹脂の界面を消去して注型用樹脂を硬化
させることで、注型成形品の樹脂層の各部位には、この
各部位の使用条件に応じた組成の樹脂層を形成したの
で、物理的,化学的特性に優れた注型成形品の製造方法
を得ることができる。また、注型用樹脂の組成として、
無機質充填剤が混入された絶縁樹脂を用いることで、注
型成形品の樹脂層の一部には、この一部にかかる使用環
境に応じた無機充填剤を含む樹脂層を形成したので、物
理的,化学的特性に優れた注型成形品の製造方法を得る
ことができる。また、請求項4に記載の発明によれば、
無機質充填剤をシリカ粉末とすることで、注型成形品の
樹脂層の一部には、この一部にかかる使用環境に応じた
シリカ粉末を含む樹脂層を形成したので、物理的,化学
的特性に優れた注型成形品の製造方法を得ることができ
る。
According to the third aspect of the present invention, gold
Injection molding resin is injected into the mold and cured.
In the manufacturing method, the inside of the mold is divided into
Composition with inorganic filler mixed inside the defined mold
Injection of different casting resins and removal of shielding plates between compartments
Then, rotate the mold to mix the inorganic filler in the casting resin.
Forming a gradient of the combined ratio and then vibrating the mold
Erasing the interface between different casting resins and curing the casting resin
By doing so, each part of the resin layer of the cast molded product
The resin layer of the composition according to the use condition of each part was formed.
For manufacturing cast molded articles with excellent physical and chemical properties
Can be obtained. Also, as the composition of the casting resin,
By using an insulating resin mixed with an inorganic filler, a resin layer containing an inorganic filler according to the usage environment is formed on a part of the resin layer of the cast molded product, And a method for producing a cast molded article having excellent chemical and chemical properties. According to the invention described in claim 4,
By using silica powder as the inorganic filler, a resin layer containing silica powder corresponding to the use environment is formed on a part of the resin layer of the cast molded article, so that physical and chemical A method for producing a cast molded article having excellent characteristics can be obtained.

【0055】さらに、請求項5に記載の発明によれば、
金型の内部に注型用樹脂を注入し硬化させる注型成形品
の製造方法において、金型の内部を複数に区画し、この
区画された前記金型の内部の少なくとも一区画に、導電
性の注型樹脂を注入し、区画間の遮蔽板を除去した後、
金型を振動させて組成の異なる注型用樹脂の界面を消去
させて注型樹脂を硬化させることで、注型成形品の樹脂
層の一部には、注型成形品にかかる電界を緩和する導電
性の樹脂層を形成したので、製造工程を短縮し、電界緩
和層を容易に形成することのできる注型成形品の製造方
法を得ることである。
Further, according to the fifth aspect of the present invention,
In a method of manufacturing a cast molded product in which a casting resin is injected into a mold and cured, the inside of the mold is divided into a plurality of sections, and at least one section inside the sectioned mold is electrically conductive. After injecting the casting resin, and removing the shielding plate between the sections,
Vibrating the mold to erase the interface between casting resins with different compositions
By hardening the casting resin, a part of the resin layer of the casting was formed with a conductive resin layer to reduce the electric field applied to the casting, shortening the manufacturing process, An object of the present invention is to provide a method for manufacturing a cast molded product in which an electric field relaxation layer can be easily formed.

【図面の簡単な説明】[Brief description of the drawings]

【図1】請求項1,2,3及び請求項4に記載の発明の
注型成形品の製造方法の一実施例を示す縦断面図。
FIG. 1 is a longitudinal sectional view showing one embodiment of a method for manufacturing a cast molded product according to the first, second, third and fourth aspects of the present invention.

【図2】請求項1,2,3及び請求項4に記載の発明の
注型成形品の製造方法の作用を示す部分拡大断面図。
FIG. 2 is a partially enlarged sectional view showing the operation of the method of manufacturing a cast molded product according to the first, second, third and fourth aspects of the present invention.

【図3】請求項1,2,3及び請求項4に記載の発明の
注型成形品の製造方法の一実施例を示す図1と異なる縦
断面図。
FIG. 3 is a longitudinal sectional view different from FIG. 1 showing one embodiment of the method for producing a cast molded product according to the first, second, third and fourth aspects of the present invention.

【図4】請求項1,2,3及び請求項4に記載の発明の
注型成形品の図2と異なる作用を示すグラフ。
FIG. 4 is a graph showing an operation of the cast molded product according to the first, second, third, and fourth aspects, which is different from that of FIG.

【図5】請求項5に記載の発明の注型成形品の製造方法
の一実施例を示す縦断面図。
FIG. 5 is a longitudinal sectional view showing one embodiment of the method for manufacturing a cast molded product according to the invention of claim 5 ;

【図6】請求項5に記載の発明の注型成形品の製造方法
の作用を示す部分拡大断面図。
FIG. 6 is a partially enlarged sectional view showing the operation of the method for manufacturing a cast molded product according to the invention of claim 5 ;

【図7】請求項5に記載の発明の注型成形品の製造方法
の作用を示す図6と異なる縦断面図。
FIG. 7 is a longitudinal sectional view different from FIG. 6 showing the operation of the method of manufacturing a cast molded product according to the invention of claim 5 ;

【図8】従来の注型成形品の製造方法で製造されたブッ
シングの一例を示す断面図。
FIG. 8 is a cross-sectional view showing an example of a bushing manufactured by a conventional method for manufacturing a cast molded product.

【図9】従来の注型成形品の製造方法で製造されたブッ
シングの図8と異なる一例を示す断面図。
FIG. 9 is a cross-sectional view showing an example different from FIG. 8 of a bushing manufactured by a conventional method of manufacturing a cast molded product.

【符号の説明】[Explanation of symbols]

1, 1A…ブッシング、2,2A…導体、3,14…注
型材料、4…金属インサート、5…充填剤、6,6A…
仕切板、7,7A…金型、8…低充填注型材料、9…高
充填注型材料、10…絶縁樹脂、11,11A…耐熱容器、12
…導電性充填剤、13シリカ充填剤。
1, 1A ... bushing, 2, 2A ... conductor, 3, 14 ... casting material, 4 ... metal insert, 5 ... filler, 6, 6A ...
Partition plate, 7, 7A: Mold, 8: Low filling casting material, 9: High filling casting material, 10: Insulating resin, 11, 11A: Heat resistant container, 12
... conductive filler, 13 silica filler.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮川 勝 東京都府中市東芝町1番地 株式会社東 芝 府中工場内 (72)発明者 永田 恭文 東京都港区芝浦一丁目1番1号 株式会 社東芝 本社事務所内 (56)参考文献 特開 昭61−149319(JP,A) 特開 昭62−37110(JP,A) 特開 昭59−218842(JP,A) 特開 平2−254127(JP,A) 特開 平6−104135(JP,A) 特開 平6−304931(JP,A) 特開 平5−318429(JP,A) 特開 昭52−29862(JP,A) 特開 昭58−175614(JP,A) 特開 昭55−86857(JP,A) 特公 昭31−3287(JP,B1) (58)調査した分野(Int.Cl.7,DB名) B29C 39/02 - 39/12 B29C 39/22 - 39/24 B29C 39/42 - 39/44 B28B 1/08 B28B 1/20 - 1/28 B28B 7/02 B28B 13/00 - 13/02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Miyagawa 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Plant, Toshiba Corporation (72) Inventor Yasufumi Nagata 1-1-1, Shibaura, Minato-ku, Tokyo Stock Company (56) References JP-A-61-149319 (JP, A) JP-A-62-37110 (JP, A) JP-A-59-218842 (JP, A) JP-A-2-254127 ( JP, A) JP-A-6-104135 (JP, A) JP-A-6-304931 (JP, A) JP-A-5-318429 (JP, A) JP-A-52-29862 (JP, A) JP 58-175614 (JP, A) JP-A-55-86857 (JP, A) JP-B-31-3287 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) B29C 39 / 02-39/12 B29C 39/22-39/24 B29C 39/42-39/44 B28B 1/08 B28B 1/20-1/28 B28B 7/02 B28B 13/00-13/02

Claims (5)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 金型の内部に注型用樹脂を注入し硬化さ
せる注型成形品の製造方法において、前記金型の内部を
複数に区画し、この区画された前記金型の内部に、組成
の異なる前記注型用樹脂を注入し、前記区画間の遮蔽板
を除去した後、前記金型を振動させて組成の異なる前記
注型用樹脂の界面を消去させて前記注型用樹脂を硬化さ
せる注型成形品の製造方法。
1. A method of manufacturing a cast molded product in which a casting resin is injected into a mold and cured, wherein the interior of the mold is divided into a plurality of sections, and After injecting the casting resin having a different composition and removing the shielding plate between the sections, the mold having a different composition is vibrated by vibrating the mold.
A method for producing a cast molded article in which the interface of the casting resin is erased to cure the casting resin.
【請求項2】 金型の内部に注型用樹脂を注入し硬化さ
せる注型成形品の製造方法において、前記金型の内部を
複数に区画し、この区画された前記金型の内部に、無機
質充填剤が混入された組成の異なる前記注型用樹脂を注
入し、前記区画間の遮蔽板を除去した後、前記金型を回
転させて前記注型用樹脂の無機質充填剤の混合比の勾配
を形成して前記注型用樹脂を硬化させる注型成形品の製
造方法。
2. A casting resin is injected into a mold and cured.
In the method for producing a cast molded product, the inside of the mold is
The mold is divided into a plurality of parts, and an inorganic material is provided inside the divided mold.
Injection molding resin with different composition mixed with porous filler
After removing the shielding plate between the sections, the mold is rotated.
The gradient of the mixing ratio of the inorganic filler of the casting resin
To form a cast molded article by curing the casting resin
Construction method.
【請求項3】 金型の内部に注型用樹脂を注入し硬化さ
せる注型成形品の製造方法において、前記金型の内部を
複数に区画し、この区画された前記金型の内部に、無機
質充填剤が混入された組成の異なる前記注型用樹脂を注
入し、前記区画間の遮蔽板を除去した後、前記金型を回
転させて前記注型用樹脂の無機質充填剤の混合比の勾配
を形成し、その後前記金型を振動させて組成の異なる前
記注型用樹脂の界面を消去して前記注型用樹脂を硬化さ
せる注型成形品の製造方法。
3. A casting resin is injected into the mold and cured.
In the method for producing a cast molded product, the inside of the mold is
The mold is divided into a plurality of parts, and an inorganic material is provided inside the divided mold.
Injection molding resin with different composition mixed with porous filler
After removing the shielding plate between the sections, the mold is rotated.
The gradient of the mixing ratio of the inorganic filler of the casting resin
Is formed, and then the mold is vibrated before the composition is different.
The interface of the casting resin is erased to cure the casting resin.
The method of manufacturing cast molded products.
【請求項4】 無機質充填剤をシリカ粉末としたことを
特徴とする請求項2または請求項3のいずれかに記載の
注型成形品の製造方法。
4. The method for producing a cast molded product according to claim 2, wherein the inorganic filler is silica powder.
【請求項5】 金型の内部に注型用樹脂を注入し硬化さ
せる注型成形品の製造方法において、前記金型の内部を
複数に区画し、この区画された前記金型の内部の少なく
とも一区画に、導電性の注型樹脂を注入し、前記区画間
の遮蔽板を除去した後、前記金型を振動させて組成の異
なる前記注型用樹脂の界面を消去させて前記注型樹脂を
硬化させる注型成形品の製造方法。
5. A method of manufacturing a cast molded product in which a casting resin is injected into a mold and cured, wherein the inside of the mold is divided into a plurality of sections, and at least the inside of the sectioned mold is divided. After injecting a conductive casting resin into one section and removing the shielding plate between the sections, the mold is vibrated and the composition is changed.
A method for producing a cast molded article, wherein the interface of the casting resin is erased to cure the casting resin.
JP1392694A 1994-02-08 1994-02-08 Manufacturing method of cast molding Expired - Fee Related JP3285693B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1392694A JP3285693B2 (en) 1994-02-08 1994-02-08 Manufacturing method of cast molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1392694A JP3285693B2 (en) 1994-02-08 1994-02-08 Manufacturing method of cast molding

Publications (2)

Publication Number Publication Date
JPH07214576A JPH07214576A (en) 1995-08-15
JP3285693B2 true JP3285693B2 (en) 2002-05-27

Family

ID=11846797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1392694A Expired - Fee Related JP3285693B2 (en) 1994-02-08 1994-02-08 Manufacturing method of cast molding

Country Status (1)

Country Link
JP (1) JP3285693B2 (en)

Also Published As

Publication number Publication date
JPH07214576A (en) 1995-08-15

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