JPH03248809A - Manufacture of cast insulator and casting mold for cast insulator used therefor - Google Patents
Manufacture of cast insulator and casting mold for cast insulator used thereforInfo
- Publication number
- JPH03248809A JPH03248809A JP4804890A JP4804890A JPH03248809A JP H03248809 A JPH03248809 A JP H03248809A JP 4804890 A JP4804890 A JP 4804890A JP 4804890 A JP4804890 A JP 4804890A JP H03248809 A JPH03248809 A JP H03248809A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- casting resin
- cast
- resin
- mold
- 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.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 131
- 239000012212 insulator Substances 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 91
- 239000011347 resin Substances 0.000 claims abstract description 91
- 239000004020 conductor Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims description 40
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 230000007423 decrease Effects 0.000 claims description 4
- 239000011800 void material Substances 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 125000006850 spacer group Chemical group 0.000 description 12
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C45/14073—Positioning or centering articles in the mould using means being retractable during injection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C2045/7343—Heating or cooling of the mould heating or cooling different mould parts at different temperatures
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、高圧大電流で使用される注型絶縁物に好適な
注型絶縁物の製造方法およびこれに使用する注型金型に
関する。Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention provides a method for manufacturing a cast insulator suitable for use in high voltage and large current, and a method for producing a cast insulator used therein. Regarding molds.
（従来の技術）
一般に、エポキシ樹脂による注型品は、機構的な安定さ
と同時に、優れた電気絶縁性をイ」与でき、しかも機械
的特性の同一品質のものが得られるため、碍子、ブッシ
ング、小型変圧器、小型電動機など広く利用されてきた
。そして大型の機器に対しても、これらの長所は十分生
かし得ることから種々の応用が検討されている。(Prior art) In general, cast products made of epoxy resin can provide not only mechanical stability but also excellent electrical insulation properties, and can also be used for insulators, bushings, etc. It has been widely used in applications such as small transformers, small electric motors, etc. Since these advantages can be fully utilized even for large-scale equipment, various applications are being considered.
近年エポキシ樹脂による注型品の量産化にともない、加
圧ゲル化方法により注型品の製作を行うことが多くなっ
てきた。この加圧ゲル化方法は、注型金型の温度を、注
入する樹脂の温度より高くし、かつ金型に一定の温度勾
配をつけ、しかる後、注型樹脂を／４：型金型の底も［
、＜は、下方から注入する。その後注型樹脂が完全に満
たされた後、定圧力を加えたまま、注型樹脂を高い温度
で早く硬化させる方法である。この方法の特徴は、注型
金型の底もしくはＦ方から注型樹脂を注入し、注型金型
内に入った注型樹脂は乱流を起こすことなく、緩やかに
注型金型に満たされる。In recent years, with the mass production of cast products using epoxy resins, cast products have been increasingly manufactured using a pressurized gelling method. In this pressurized gelling method, the temperature of the casting mold is made higher than the temperature of the resin to be injected, and a certain temperature gradient is applied to the mold. The bottom also [
, < is injected from below. After the molding resin is completely filled, the molding resin is quickly cured at a high temperature while applying a constant pressure. The feature of this method is that the casting resin is injected from the bottom or F side of the casting mold, and the resin that enters the casting mold gently fills the casting mold without causing turbulence. It will be done.
この場合、注型樹脂は乱流を起こさないため、先に注入
された注型樹脂の温度は、注型金型の温度の熱伝導によ
り、後から注入された注型樹脂の温度より高くなり、注
型金型内に満たされた注型樹脂には温度勾配かＮ”ｊさ
れる。In this case, since the casting resin does not cause turbulence, the temperature of the casting resin injected first becomes higher than the temperature of the casting resin injected later due to thermal conduction of the temperature of the casting mold. , the casting resin filled in the casting mold is subjected to a temperature gradient N''j.
さらに注型金型にも一定の温度勾配を付け、注型樹脂を
注入するバー人口から最も遠い注型金型上部を最も温度
が高く、注入口付近の温度を最も低くしているため、注
入口から最も遠い所の注型樹脂の温度が最も高く、注入
口（＝１近の注型樹脂の温度が最も低くなり、注型金型
内に満たされた注型樹脂には確実に温度勾配かつく。そ
のため、注入口から最も遠い注型樹脂から硬化が始まり
、注入口により近い注型樹脂はど遅く硬化する。また、
注型樹脂が硬化する際には硬化収縮が生じるが、注型樹
脂は注入口から一定圧力で加圧されているため、硬化に
より収縮した分は、まだ硬化していない注入口により近
い注型樹脂で補われる。こうした加圧ゲル化方法を適用
することにより、注型樹脂を早く硬化させることかでき
、収縮による内部歪みか緩和され、ヒケのない優れた特
性を有する注型品を製作することができる。Furthermore, the casting mold has a certain temperature gradient, and the upper part of the casting mold, which is farthest from the bar where the casting resin is injected, has the highest temperature, and the temperature near the injection port is the lowest. The temperature of the casting resin farthest from the inlet is the highest, and the temperature of the casting resin near the injection port (= 1) is the lowest, ensuring that there is a temperature gradient in the casting resin filled in the casting mold. Therefore, the casting resin farthest from the injection port will start to harden, and the casting resin closer to the injection port will harden slower.
Curing shrinkage occurs when the casting resin hardens, but since the casting resin is pressurized at a constant pressure from the injection port, the shrinkage due to curing is absorbed by the casting closer to the injection port, which has not yet hardened. Supplemented with resin. By applying such a pressurized gelling method, the casting resin can be cured quickly, internal distortion caused by shrinkage can be alleviated, and a cast product with excellent properties without sink marks can be produced.
この加圧ゲル化方法を適用した一例として、第５図に示
すような、注型絶縁物５１としての磁気浮」二式鉄道用
の推進コイル５２がある。As an example to which this pressurized gelling method is applied, there is a propulsion coil 52 for a magnetic floating type 2 railway as a cast insulator 51, as shown in FIG.
これは被注型体５３としての、例えば約６５０ｍ＋ｎ
Ｘ １．６００ ｍｍのレーストラックの形をした、巻
回されたコイル導体５４の周囲を、注型樹脂５８で覆っ
て構成されている。ここで問題となるのは、磁気浮上式
鉄道用推進コイル５２のように人形な注型絶縁物５１の
製造において、如何にしてコイル導体５４が注型樹脂５
８の中心に埋め込まれるように、コイル導体５４を注型
金型内に固定しセットするかである。This is, for example, about 650 m+n as the cast body 53.
It is constructed by covering a wound coil conductor 54 in the shape of a racetrack with a diameter of 1.600 mm with a casting resin 58. The problem here is how to make the coil conductor 54 into the cast resin 51 in the manufacture of the doll-like cast insulator 51 like the propulsion coil 52 for the magnetic levitation railway.
The coil conductor 54 is fixed and set in the casting mold so that it is embedded in the center of the mold.
従来はこの問題を解決するため、第６図に示すように絶
縁スペーサ１０１を、コイル導体５４のほぼ全長にわた
り所定の間隔を保ってコイル導体５４と注型金型１０２
との間に配置［７て、コイル導体５４をセットしていた
。Conventionally, in order to solve this problem, as shown in FIG.
The coil conductor 54 was set between [7] and [7].
しかしこの場合、絶縁スペーサ］０１をｒめ注型樹脂５
８と同し組成のもので製作しておき、それぞれのコイル
導体５４と金型１０２との距離に合わせてその厚さを加
工調整し、さらにその表面をサンドブラストにより粗面
化し脱脂して用いていた。However, in this case, the insulating spacer ] 01 is replaced by the casting resin 5.
The coil conductor 54 is made of the same composition as 8, the thickness is processed and adjusted according to the distance between each coil conductor 54 and the mold 102, and the surface is roughened by sandblasting and degreased before use. Ta.
そして、これに注型樹脂５８を注入し、絶縁スペーサ１
０１ともども硬化させて注型絶縁物５１を製造（７てい
た。Then, the casting resin 58 is injected into this, and the insulating spacer 1 is
01 was cured to produce a cast insulator 51 (7 steps).
（発明が解決しようとする課題）
」二連したように、絶縁スペーサを用いて被注型体を支
持し、注型樹脂を注入して加圧ゲル化法を適用して、絶
縁スペーサともども硬化させたものは、注型樹脂と絶縁
スペーサとの接着性が必ずしも良好ではない。そのため
注型樹脂の硬化反応による残留応力や温度変化による膨
脂収縮により、注型樹脂と絶縁スペーサとの界面で剥離
が生じることがある。剥離が生じると、その剥離した部
分に応力が集中し、注型樹脂にクラックが発生ずる。(Problems to be Solved by the Invention) As shown in the following, an insulating spacer is used to support the cast object, a casting resin is injected, a pressure gelling method is applied, and both the insulating spacer and the insulating spacer are cured. However, the adhesion between the casting resin and the insulating spacer is not necessarily good. Therefore, peeling may occur at the interface between the casting resin and the insulating spacer due to residual stress due to the curing reaction of the casting resin or expansion and contraction due to temperature changes. When peeling occurs, stress concentrates on the peeled part, causing cracks to occur in the casting resin.
またクラックの発生に至らなくても、剥離した所からコ
ロナが発生し、電気的特性が低下し、短絡事故を起こす
などの不都合がある。Further, even if cracks do not occur, corona is generated from the peeled parts, resulting in disadvantages such as deterioration of electrical characteristics and short circuit accidents.
また、コストの面においても、絶縁スペーサの製作およ
び注型金型内での組み立てなどは工数が多く、コストが
高くなる不都合がある。In addition, in terms of cost, manufacturing the insulating spacer and assembling it in the casting mold requires a large number of man-hours, resulting in an increase in cost.
本発明は、」二連の不都合を除去するためになされたも
ので、寸法形状の複９４１な絶縁スペーサを用いること
なく、しかもクラックの発生とか、短絡事故の発生など
のない注型絶縁物の製造方法およびこれに使用される注
型絶縁物用の注型金型を提（共することを目的とする。The present invention was made in order to eliminate the disadvantages of "double series", and it is possible to create a cast insulator without using insulating spacers with complex dimensions and shapes, and without causing cracks or short circuits. The purpose of this publication is to provide a manufacturing method and a casting mold for casting insulators used in the process.
［発明の構成］
（課題を解決するための手段）
本発明は上記目的を達成するため、請求項（１）の注型
絶縁物は、注型金型の充填空所の注入口から最も遠い上
部近傍を避けて配置された支持体により充填空所内に被
注型体を収容支持し、しかる後、上記」二部近傍から注
入口近傍に向かって温度が下がる温度勾配を注型金型に
設定し、しかる後、注型金型の注入口から加熱された注
型樹脂を注入充填し、
しかる後、上記上部近傍の注型樹脂の温度を局部的に上
昇硬化さぜこれにより被注型体を支持するとともに支持
体を含む他の注型樹脂を未硬化の軟化状態に維持し、
しかる後、上記支持体を充填空所内から後退させこれに
より生じる空所に与圧により注型樹脂を充填し、
しかる後、注型樹脂全体を硬化させることを特徴とする
構成である。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the cast insulator according to claim (1) is provided in a mold which is farthest from the injection port of the filling cavity of the casting mold. The object to be cast is accommodated and supported in the filling cavity by a support placed avoiding the vicinity of the upper part, and then a temperature gradient that decreases from the vicinity of the second part to the vicinity of the injection port is applied to the casting mold. After setting, the heated casting resin is injected from the injection port of the casting mold, and then the temperature of the casting resin near the upper part is locally raised to harden.This causes the cast mold to harden. While supporting the body, the other casting resin including the support is maintained in an uncured and softened state, and then the support is retreated from the filling cavity, and the resulting cavity is filled with casting resin by applying pressure. This structure is characterized by filling the resin and then curing the entire casting resin.
また、請求項（２）の注型絶縁物の製造方法は、請求項
（１）記載の注型絶縁物の製造方法において被注型体は
導体もしくは、コイル導体であることを特徴とする構成
である。Furthermore, the method for manufacturing a cast insulator according to claim (2) is characterized in that in the method for manufacturing a cast insulator according to claim (1), the object to be cast is a conductor or a coil conductor. It is.
さらに請求項（３）の注型絶縁物用の注型金型は、被注
型体を収容する充填空所およびここに注型樹脂を注入す
る注入口をもった金型本体と、上記金型本体に設けられ
て充填空所の注入口から最も遠い上部近傍を加熱する局
部加熱体とその他の部分を加熱する加熱体とからなり、
上記」二部近傍から注入口近傍に向かって温度が低くな
る温度勾配を設定しこの勾配に逆らって注入された注型
樹脂に対し上記局部加熱体により上記上部近傍を他の部
分より高温に局部加熱して硬化させその後加熱体により
他の注型樹脂を硬化温度に加熱する加熱手段と、
充填空所内に対し出没自在に設けられかつ充填空所の上
記上部近傍を避けて配置された複数個の支持体からなり
かつ突出により被注型体を充填空所内に支持し上記」二
部近傍が硬化した後後退没入する支持手段とを具備した
ことを特徴とする構成である。Furthermore, the casting mold for cast insulators according to claim (3) includes a mold body having a filling cavity for accommodating a cast object and an injection port for injecting a casting resin into the filling cavity, and It consists of a local heating element that is installed in the mold body and heats the upper part of the filling cavity farthest from the injection port, and a heating element that heats the other parts,
A temperature gradient is set in which the temperature decreases from near the second part to near the injection port, and when the casting resin is injected against this gradient, the local heating element locally heats the upper part to a higher temperature than other parts. a heating means that heats and cures the resin and then heats another casting resin to a curing temperature using a heating body; and a plurality of heating means that are provided so as to be able to move in and out of the filling cavity and are arranged so as to avoid the vicinity of the above-mentioned upper part of the filling cavity. This structure is characterized by comprising a support means which supports the cast body in the filling cavity by protrusion and is retracted and retracted after the vicinity of the second part is hardened.
さらにまた、請求項（４）の注型絶縁物用の注型金型は
、請求項（３）記載の注型絶縁物用の注型金型において
加熱手段は電気ヒーターであり充填空所の注入口から最
も離間した上部近傍を加熱する電気ヒーターと他の電気
ヒーターとの間には熱伝導を阻止する保熱溝が設けられ
ていることを特徴とする構成である。Furthermore, the casting mold for cast insulators according to claim (4) is the casting mold for cast insulators according to claim (3), in which the heating means is an electric heater, and the heating means is an electric heater. This configuration is characterized in that a heat retaining groove for preventing heat conduction is provided between the electric heater that heats the upper portion that is farthest from the injection port and the other electric heaters.
（作用）
請求項（１）、（２）の注型絶縁物の製造方法において
は、充填空所（被注型体と実質的には同じ）の注入口か
ら最も遠い上部近傍、ずなわぢ加圧ゲル化方法の際に最
も注型樹脂の温度が上がる部分を局部加熱昇温により他
の部分より先に硬化させ、これにより被注型体を支持さ
せるので、他の部分の未硬化の軟化部分にある支持体を
注型樹脂から後退させて、充填空所外に没入させること
ができる。(Function) In the method for manufacturing a cast insulator according to claims (1) and (2), the filling cavity (substantially the same as the cast body) near the top farthest from the injection port, During the pressurized gelation method, the part where the temperature of the casting resin rises the most is cured earlier than other parts by local heating, and this supports the cast object, so that uncured parts of the other parts are cured. The support in the softened part can be withdrawn from the casting resin and recessed out of the filling cavity.
また、請求項（３）、（４）の注型絶縁物用の注型金型
は、被注型体の注入口から最も遠い部位近傍を局部的に
加熱する局部加熱体と、その他の部分を加熱する加熱体
とを設けたので、温度勾配の設定、局部硬化などが容易
に実施できる。支持体も空所内に出没自在なので、種々
な形状の被注型体に対応でき、しかも注型樹脂の硬化に
先立ち充填空所外に退避できる。従って請求項（１）、
（２）記載の注型絶縁物の製造方法の実施に極めて適し
ている。In addition, the casting mold for casting insulators according to claims (3) and (4) includes a local heating body that locally heats the vicinity of the part of the object to be cast that is farthest from the injection port, and other parts. Since a heating element is provided to heat the material, temperature gradient setting, local curing, etc. can be easily carried out. Since the support body can also move in and out of the cavity, it can accommodate various shapes of cast bodies, and can be retracted from the filling cavity prior to curing of the casting resin. Therefore, claim (1),
(2) It is extremely suitable for carrying out the method for manufacturing cast insulators described above.
（実施例）
以下本発明の詳細を第１図ないし第５図を参照しながら
実施例により説明する。(Example) The details of the present invention will be explained below by way of an example with reference to FIGS. 1 to 5.
第１の実施例を第１図および第２図を参照しながら説明
する。A first embodiment will be described with reference to FIGS. 1 and 2.
第１図は本発明の注型絶縁物用の注型金型］Ａの断面図
である。１は金型本体で、内部には充填空所（以下空所
と称す）２が設けられており、下方には注型樹脂５８を
注入する注入口４が設けられている。なお、空所２内に
装入される被注型体１
５３は、導体５５て、口出し部５５ａを備えており、こ
の口だし部５５ａを下にしてボルト５で固定される。FIG. 1 is a sectional view of a casting mold A for casting an insulator according to the present invention. Reference numeral 1 denotes a mold body, inside of which a filling cavity (hereinafter referred to as cavity) 2 is provided, and an injection port 4 for injecting a casting resin 58 is provided below. The cast body 153 inserted into the cavity 2 is provided with a conductor 55 and an opening 55a, and is fixed with the bolt 5 with the opening 55a facing down.
また、金型本体１の中間部には、支持手段１１が設けら
れており、これは複数個の支持体１１ ａ１］ｂ、・・
・ からなっており、これら支持体１１ａ ・・・・・
・・・・は金型本体１にスライド方式または、ねじ込み
方式により空所２に対し出没自在に取り付けられている
。これらを突出させその位置を調節することにより、導
体５５が所定の位置、姿勢に位置決め支持される。そし
て後述する理由により、空所２の注入口４から最も遠い
上部近傍２ａ。Further, a support means 11 is provided in the middle part of the mold body 1, and this includes a plurality of supports 11 a1]b, . . .
These supports 11a...
. . . are attached to the mold body 1 by a sliding method or a screwing method so as to be able to freely appear and retract from the empty space 2. By protruding these and adjusting their positions, the conductor 55 is positioned and supported at a predetermined position and attitude. For reasons to be described later, the upper portion 2a of the space 2 is farthest from the injection port 4.
すなわち加圧ゲル化製法の際に注型樹脂５８が最も温度
の高くなる部分を避けて配置されている。In other words, the casting resin 58 is placed so as to avoid the part where the temperature is highest during the pressurized gelling process.
なお、支持体］、１ａ、ｌｌｂ・・・・・は図面の左右
方向のもののみ示されているが、これらに直角な方向に
も設けられている。Note that although the supports], 1a, llb, .
さらに金型本体］には、空所２の周囲に加熱手段２１−
か設けられている。これは電気ヒーター２２ａ、２２ａ
・・・・・からなる局部加熱体２２と、電 ２
気ヒーター２３ａ、２３ａ・・・・・・とからなる加熱
体２３とからなっており、局部加熱体２２はピッチが密
に設けられており、加熱体２３は疎に設けられている。Furthermore, the mold body] has a heating means 21- around the cavity 2.
Or is provided. This is electric heater 22a, 22a
It consists of a local heating body 22 consisting of..., and a heating body 23 consisting of electric heaters 23a, 23a..., and the local heating bodies 22 are arranged at close pitches. Therefore, the heating bodies 23 are sparsely provided.
電気ヒーター２２ａ・・・・・・は上述した空所２の注
入口４から最も遠い上部近傍２ａを囲むように設けられ
ており、これによりこの遠い上部近傍２ａの温度を他の
部分の温度より局部的に高く設定可能である。The electric heaters 22a are provided so as to surround the upper portion 2a of the space 2 farthest from the injection port 4, thereby making the temperature of this far upper portion 2a higher than the temperature of other parts. Can be set locally high.
本実施例の注型金型ＩＡは上述のような構成であるが、
これを用いた本発明の製造方法の実施態様につき説明す
る。The casting mold IA of this example has the above-mentioned configuration, but
An embodiment of the manufacturing method of the present invention using this will be described.
注型金型１Ａの温度設定は、使用する注型樹脂５８の温
度と硬化時間の関係により決まる。第２図は、本実施例
に用いた注型樹脂５８（エポキシ樹脂）の温度と硬化時
間との関係を示す図である。The temperature setting of the casting mold 1A is determined by the relationship between the temperature of the casting resin 58 used and the curing time. FIG. 2 is a diagram showing the relationship between the temperature and curing time of the casting resin 58 (epoxy resin) used in this example.
温度が高いと注型樹脂５８は短い時間で硬化する。If the temperature is high, the casting resin 58 will harden in a short time.
注型金型１Ａの加熱は、」二部のヒーター２２ａ・・・
の温度を１４０℃に、その他のヒーター２３ａ・・・・
・・の温度を１２５℃に設定することにより、注型金型
の」二部の温度、すなわち空所２の注入口４から最も遠
い上部近傍２ａの温度はヒーター２２ａの温度と同じに
なり、その他の温度はヒーター２３ａの温度と同じにな
る。Heating of the casting mold 1A is performed by two heaters 22a...
temperature to 140°C, other heaters 23a...
By setting the temperature of . The other temperatures are the same as the temperature of the heater 23a.
注型金型が所定の温度分布になったら、注型樹脂５８を
注型金型の底もしくは下方に設けられた注入口４から一
定の圧力Ｐを加えながら緩やかに乱流を起こすことなく
注入する。注型樹脂は注入されながら注型金型から加熱
されるので、注型樹脂には上下に温度勾配が生じる。注
型樹脂５８が完全に満たされた後も一定の圧力Ｐを加え
たままにしておく。これにより、ヒーター２２ａおよび
空所２の上部近傍２ａの注型樹脂５８の温度は１４０℃
になり、第２図のａ点に示すように、はぼ］−〇分間で
硬化する。また、ヒーター２３ａに囲まれた部分の注型
樹脂５８の温度は１２０℃になり、第２図の点すに示す
ように３０分経過しないと硬化しない。When the casting mold reaches a predetermined temperature distribution, the casting resin 58 is slowly injected without causing turbulence while applying a constant pressure P from the injection port 4 provided at the bottom or lower part of the casting mold. do. Since the casting resin is heated from the casting mold while being injected, a temperature gradient occurs vertically in the casting resin. Even after the casting resin 58 is completely filled, a constant pressure P is kept applied. As a result, the temperature of the heater 22a and the casting resin 58 near the upper part 2a of the cavity 2 is 140°C.
As shown at point a in FIG. Further, the temperature of the casting resin 58 in the area surrounded by the heater 23a reaches 120° C., and it will not harden until 30 minutes have elapsed, as shown by the dots in FIG.
そこで導体５５の上部、すなわち上部近傍２ａの注型樹
脂５８が硬化した時点で、まだ軟化している注型樹脂５
８中の支持体１．１． ａ、１−１ ｂ・・・・・を、
それらの先端か空所２の内壁と同一面、すなわち面一に
なるまで後退させる。これらの支持体］］ａ、・・・・
・・を引き戻しても、空所２の注入口４から最も遠い」
二部近傍２ａの注型樹脂５８が硬化しているため、導体
５５の」二部５５ｂは、これに固定されるので不都合は
ない。Therefore, when the casting resin 58 in the upper part of the conductor 55, that is, in the vicinity of the upper part 2a is hardened, the still softening casting resin 5
Support in 8 1.1. a, 1-1 b...,
These tips are retracted until they are flush with the inner wall of the cavity 2, that is, flush with the inner wall of the cavity 2. These supports]]a,...
Even if you pull back..., it's the farthest from the injection port 4 in the void 2."
Since the casting resin 58 near the second part 2a is hardened, the second part 55b of the conductor 55 is fixed thereto, so there is no problem.
また、このように支持体１１ａ１・・・・・・を引き戻
すことにより、これらがあった部分は空所になるが、注
入口４から一定の圧力Ｐが加えられているので、また硬
化していないヒーター２３ａ、・・・・・イ」近の注型
樹脂５８が移動し補われる。In addition, by pulling back the supports 11a1... in this way, the parts where they were will become empty spaces, but since a constant pressure P is applied from the injection port 4, they will not harden again. The casting resin 58 near the missing heater 23a, . . ., moves and compensates for it.
その後、ヒーター２３ａ、・・・・・・イτ１近の注型
樹脂５８は１２０℃、３０分て硬化するので、導体５５
の上部５５ｂ近傍の注型樹脂５８か硬化してから２０分
後に硬化し、注型金型１Ａに満たされた注型樹脂５８全
部が硬化する。After that, the casting resin 58 near the heater 23a, .
20 minutes after the casting resin 58 near the upper part 55b of the cast resin 58 is cured, the entire casting resin 58 filled in the casting mold 1A is cured.
注型樹脂５８全部が硬化した後は、離型して二次硬化し
、絶縁スペーサのない注型絶縁物かえられる。After the entire casting resin 58 is cured, it is released from the mold and subjected to secondary curing, and is replaced with a cast insulator without an insulating spacer.
本実施例のように、電気ヒーターのピッチを変 ５
えて局部加熱体と加熱体とを構成したものは、電流の制
御により容易に所望の温度勾配が得られる。As in this embodiment, when the local heating element and the heating element are constructed by changing the pitch of the electric heater, a desired temperature gradient can be easily obtained by controlling the current.
次に第２の実施例を第３図ないし第５図を参照しながら
説明する。Next, a second embodiment will be described with reference to FIGS. 3 to 5.
本実施例の注型絶縁物５１は、従来例で述べた磁気浮上
式鉄道用の推進コイル５２て、口出し部５４ａを備えて
いる。The cast insulator 51 of this embodiment has a protrusion portion 54a similar to the propulsion coil 52 for the magnetic levitation railway described in the conventional example.
第３図はコイル導体５４を本発明の注型金型３１Ａにセ
ットし注型樹脂５８を注入して満たした状態を示す正面
図で、第４図は第３図のＩＶ−ＩＶ線に沿った断面図で
ある。FIG. 3 is a front view showing a state where the coil conductor 54 is set in the casting mold 31A of the present invention and filled with casting resin 58, and FIG. 4 is a view taken along the line IV-IV in FIG. FIG.
注型金型３１Ａは２分割自在な金型本体３１からなって
おり、内部に空所３３が形成され、さらに下方には注入
口３４が設けられている。The casting mold 31A consists of a mold body 31 that can be freely divided into two parts, and a cavity 33 is formed inside, and an injection port 34 is provided further below.
また、空所３３を囲むように加熱手段３５が設けられて
おり（第３図には示してない）、これは金型本体３１に
埋め込まれた電気ヒーター３６ａ、・・・３６ａ１から
なる局部加熱体３６と、電気ヒター３７ａ１ ・・・・
・３７ａからなる加熱体３７と、 ６
局部加熱体３６と加熱体３７との境に形成された溝から
なる保熱溝３８とからなっている。この保熱溝３８はヒ
ーター３６ａからの熱が外側に伝わって逃げるのを防止
するものである。この保熱溝３８の囲む部分（金型本体
３１の上部）に対応した空所３３は、第１の実施例で説
明した、注入口３４から最も離間した上部近傍３３ａで
あって、他の部分より高温に加熱し、最初に硬化させる
部分である。Further, a heating means 35 (not shown in FIG. 3) is provided so as to surround the cavity 33, and this consists of electric heaters 36a, . . . , 36a1 embedded in the mold body 31 for local heating. Body 36 and electric heater 37a1...
- Consists of a heating body 37 consisting of 37a, and a heat retaining groove 38 consisting of a groove formed at the boundary between the local heating body 36 and the heating body 37. This heat retaining groove 38 prevents the heat from the heater 36a from being transmitted to the outside and escaping. The space 33 corresponding to the part surrounded by the heat retaining groove 38 (the upper part of the mold body 31) is the upper part 33a which is farthest away from the injection port 34, as described in the first embodiment, and the other part This is the part that is heated to a higher temperature and hardened first.
また、レーストラック状の空所３３に沿って、支持手段
４１が設けられている。これは空所３３を介して互いに
対向して設けられた複数対の支持体４１．ａ、４１．ｂ
、４１ｃ、４１ｄ、４１ｅ、４１ｆからなっている。こ
れらはそれぞれ空所３３に対して出没自在に設けられて
おり、ねじはめ合いもしくはスライド方式により突出位
置の調整が容品である。Support means 41 are also provided along the racetrack-shaped cavity 33. This consists of a plurality of pairs of supports 41 . a, 41. b
, 41c, 41d, 41e, and 41f. Each of these is provided so as to be able to protrude and retract from the space 33, and the protruding position can be adjusted by screw fitting or sliding.
本実施例の注型金型３１ Ａは上述のように構成されて
いるが、次ぎに作用とともに本発明の製造方法の実施態
様に伺き説明する。The casting mold 31A of this embodiment is constructed as described above, and next, the operation and embodiments of the manufacturing method of the present invention will be explained.
コイル導体５４の口だし部５４ａを注型金型３１Ａの底
の部分にボルト４２て固定する。しかしながら、コイル
導体５４は口だし部５４ａを固定しても位置が定まらず
不安定であるため、支持体４１ａ、・・・・・・・・・
４ ］、 ｆて位置を決め、注型樹脂５８の中心に埋め
込まれるように固定する。The protruding portion 54a of the coil conductor 54 is fixed to the bottom portion of the casting mold 31A using a bolt 42. However, since the position of the coil conductor 54 is unstable even if the protruding portion 54a is fixed, the support 41a...
4] and f to determine the position and fix it so that it is embedded in the center of the casting resin 58.
位置決めが終ったら加熱手段３５により、金型本体３１
を加熱すると、保熱溝３８に囲まれた部分は保熱溝３８
のため温度が他の部分より高くなる。すなわち、第１の
実施例の場合と同様に、空所３３の注入口３４から最も
離間した上部近傍３３ａの温度が他の部分より高くなる
。例えば、保熱溝３８内を１４０℃にその他の部分を１
２０°Ｃのような温度勾配をつける。そして加圧ゲル化
法と同様に、注型樹脂５８を注入口３４から緩やかに注
入し、空所３３を満たした後も一定の圧力Ｐを加えてお
く。After the positioning is completed, the mold body 31 is heated by the heating means 35.
When heated, the part surrounded by the heat retention groove 38 becomes the heat retention groove 38.
Therefore, the temperature will be higher than other parts. That is, as in the case of the first embodiment, the temperature of the upper portion 33a of the space 33 that is farthest away from the injection port 34 is higher than the other portions. For example, the inside of the heat retention groove 38 is heated to 140°C, and the other parts are heated to 140°C.
Create a temperature gradient such as 20°C. Then, similarly to the pressure gelling method, the casting resin 58 is slowly injected from the injection port 34, and even after filling the cavity 33, a constant pressure P is applied.
このような状態を保った後、高温部が硬化し、硬化した
ら支持体４１ ａ、・・・・・・・４１ｆを後退させ、
その後全体を硬化させることは、第１の実施例の場合と
同様なので、詳細な説明は省略する。After maintaining this state, the high temperature portion is cured, and once cured, the supports 41a, 41f are retreated,
Since the subsequent curing of the entire structure is the same as in the first embodiment, detailed explanation will be omitted.
本実施例のように保熱溝を設けた注型金型は、熱が外方
に逃げるのを妨げるので、迅速、正確に局部加熱を行う
ことができる。A casting mold provided with heat retaining grooves as in this embodiment prevents heat from escaping outward, so local heating can be performed quickly and accurately.
なお、被注型体は導体、コイル導体などに限定されず、
注型絶縁物ならばなんでもよい。Note that the cast object is not limited to conductors, coil conductors, etc.
Any cast insulator will do.
また、注型樹脂はエポキシ樹脂に限らず、他の熱硬化性
樹脂ならばよい。Further, the casting resin is not limited to epoxy resin, and any other thermosetting resin may be used.
［発明の効果コ
以上詳述したように、本発明の注型絶縁物の製造方法は
、注型樹脂の局部硬化により被注型体を支持させるよう
にしたので、絶縁スペーサは不要となり、支持体も硬化
前に除去されるから、クラックとか、剥離による特性劣
化の様な事故の発生は防止される。また絶縁スペーサの
製作や取り付けなどが不要なのでコスト低下の効果を奏
する。[Effects of the Invention] As detailed above, in the method for manufacturing a cast insulator of the present invention, the cast body is supported by local curing of the cast resin, so there is no need for an insulating spacer and the support is reduced. Since the material is also removed before curing, accidents such as cracks and property deterioration due to peeling are prevented from occurring. Further, since there is no need to manufacture or attach an insulating spacer, the cost can be reduced.
また、他の発明の注型絶縁物用の注型金型は、支持体を
出没自在に構成したので、種々な形状の被注型体に対応
でき、しかも後退して注型樹脂から離脱するので、異物
混入による事故は防止され ９
る。さらに、局部加熱体と加熱体とて加熱手段を構成し
たので、注型金型の温度勾配の設定や、局部硬化などが
容易に行える。さらにまた、保熱溝を設けたものは、局
部加熱が正確に行えるので、品質が向上し、作業性もよ
い。In addition, the casting mold for casting insulators of other inventions has a support that can be retracted and retracted, so it can accommodate cast objects of various shapes, and it can be moved back and removed from the casting resin. Therefore, accidents caused by foreign matter contamination can be prevented. Furthermore, since the local heating element and the heating element constitute the heating means, setting the temperature gradient of the casting mold, local curing, etc. can be easily performed. Furthermore, those provided with heat retaining grooves allow accurate local heating, resulting in improved quality and good workability.
【図面の簡単な説明】
第１図は本発明の注型絶縁物用の注型金型の第１の実施
例の要部断面正面図。第２図は同じく各実施例に用いた
注型樹脂の特性曲線図、第３図は同じく第２の実施例の
正面図、第４図は同じく第３図のＩＶ−ＩＶ線に沿った
要部断面図、第５図は上記第２の実施例および従来例の
説明に用いた注型絶縁物の正面図、第６図は従来例の説
明図である。
１−１３１・・・・・・・・ ・・・ ・・・・金型本
体ＩＡ、３］、Ａ・・ ・・・・・・・ ・注型金型２
．３３・・・・・・・・・・・ ・・・・・・・充填空
所２ａ、３３ａ・・・・・・・・・・・・・・・・充填
空所の上部近傍BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional front view of a main part of a first embodiment of a casting mold for casting insulators of the present invention. FIG. 2 is a characteristic curve diagram of the casting resin used in each example, FIG. 3 is a front view of the second example, and FIG. 4 is a characteristic curve along the IV-IV line in FIG. FIG. 5 is a front view of the cast insulator used to explain the second embodiment and the conventional example, and FIG. 6 is an explanatory diagram of the conventional example. 1-131・・・・・・・・・・・・Mold body IA, 3], A・・・・・・・Casing mold 2
．． 33・・・・・・・・・・・・・・・Filled space 2a, 33a・・・・・・・・・・・・・・・・・・Near the top of the filled space
Claims (4)
傍を避けて配置された支持体により充填空所内に被注型
体を収容支持し、 しかる後、上記上部近傍から注入口近傍に向かって温度
が下がる温度勾配を注型金型に設定し、しかる後、注型
金型の注入口から加熱された注型樹脂を注入充填し、 しかる後、上記上部近傍の注型樹脂の温度を局部的に上
昇硬化させこれにより被注型体を支持するとともに支持
体を含む他の注型樹脂を未硬化の軟化状態に維持し、 しかる後、上記支持体を充填空所内から後退させこれに
より生じる空所に与圧により注型樹脂を充填し、 しかる後、注型樹脂全体を硬化させることを特徴とする
注型絶縁物の製造方法。(1) The object to be cast is housed and supported in the filling cavity by a support placed avoiding the vicinity of the upper part farthest from the injection port of the filling cavity of the casting mold, and then the injection port is placed from the vicinity of the upper part of the filling cavity. Set a temperature gradient in the casting mold where the temperature decreases toward the vicinity, then inject and fill the heated casting resin from the injection port of the casting mold, and then fill the casting resin in the vicinity of the upper part. The temperature is locally raised to harden, thereby supporting the cast object and maintaining the other casting resin, including the support, in an uncured, softened state.Then, the support is retreated from the filling cavity. 1. A method for manufacturing a cast insulator, which comprises filling the void created by this with a cast resin under pressurization, and then curing the entire cast resin.
を特徴とする請求項（１）記載の注型絶縁物の製造方法
。(2) The method for producing a cast insulator according to claim (1), wherein the cast object is a conductor or a coil conductor.
脂を注入する注入口をもった金型本体と、上記金型本体
に設けられて充填空所の注入口から最も遠い上部近傍を
加熱する局部加熱体とその他の部分を加熱する加熱体と
からなり、上記上部近傍から注入口近傍に向かって温度
が低くなる温度勾配を設定しこの勾配に逆らって注入さ
れた注型樹脂に対し上記局部加熱体により上記上部近傍
を他の部分より高温に局部加熱して硬化させその後加熱
体により他の注型樹脂を硬化温度に加熱する加熱手段と
、 充填空所内に対し出没自在に設けられかつ充填空所の上
記上部近傍を避けて配置された複数個の支持体からなり
かつ突出により被注型体を充填空所内に支持し上記上部
近傍が硬化した後後退没入する支持手段とを具備したこ
とを特徴とする注型絶縁物用の注型金型。(3) A mold body having a filling cavity for accommodating the object to be cast and an injection port for injecting the casting resin therein, and an upper part provided in the mold body that is farthest from the injection port for the filling cavity. Consisting of a local heating element that heats the vicinity and a heating element that heats other parts, a temperature gradient is set in which the temperature decreases from near the top to near the injection port, and the casting resin is injected against this gradient. On the other hand, a heating means that locally heats the vicinity of the upper part to a higher temperature than other parts by the local heating body to harden it, and then heats other casting resin to the curing temperature by the heating body, and a heating means that can freely appear and retract into the filling cavity. Supporting means comprising a plurality of supports provided and arranged avoiding the vicinity of the upper part of the filling cavity, supporting the cast body in the filling cavity by protruding, and retracting after the vicinity of the upper part has hardened; A casting mold for casting insulators, characterized by comprising:
つ加熱体と局部加熱体との間には熱伝導を妨げる保熱溝
が設けられていることを特徴とする請求項（３）記載の
注型絶縁物用の注型金型。(4) The heating element and the local heating element are electric heaters, and a heat retention groove is provided between the heating element and the local heating element to prevent heat conduction. Casting mold for casting insulators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4804890A JP2851112B2 (en) | 1990-02-28 | 1990-02-28 | Manufacturing method of casting insulator and casting mold for casting insulator used in the method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4804890A JP2851112B2 (en) | 1990-02-28 | 1990-02-28 | Manufacturing method of casting insulator and casting mold for casting insulator used in the method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03248809A true JPH03248809A (en) | 1991-11-06 |
| JP2851112B2 JP2851112B2 (en) | 1999-01-27 |
Family
ID=12792447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4804890A Expired - Lifetime JP2851112B2 (en) | 1990-02-28 | 1990-02-28 | Manufacturing method of casting insulator and casting mold for casting insulator used in the method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2851112B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158221A (en) * | 2013-03-06 | 2013-06-19 | 哈尔滨工程大学 | Resin casting body processing die |
| CN113295293A (en) * | 2021-04-12 | 2021-08-24 | 芜湖泓鹄材料技术有限公司 | Method for designing position of inner pouring gate of pouring system by detecting dynamic change of molten iron |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10388437B2 (en) * | 2016-08-10 | 2019-08-20 | Siemens Energy, Inc. | Assembly and method for manufacturing insulation layer of electrical conductors |
-
1990
- 1990-02-28 JP JP4804890A patent/JP2851112B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158221A (en) * | 2013-03-06 | 2013-06-19 | 哈尔滨工程大学 | Resin casting body processing die |
| CN113295293A (en) * | 2021-04-12 | 2021-08-24 | 芜湖泓鹄材料技术有限公司 | Method for designing position of inner pouring gate of pouring system by detecting dynamic change of molten iron |
| CN113295293B (en) * | 2021-04-12 | 2022-06-21 | 芜湖泓鹄材料技术有限公司 | Method for designing position of inner pouring gate of pouring system by detecting dynamic change of molten iron |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2851112B2 (en) | 1999-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2856639A (en) | Method of encasing electric coils | |
| KR100718593B1 (en) | Hot Runner Heater Device and Method of Manufacture Thereof | |
| CA2225640C (en) | Method of molding composite insulator and metal molding apparatus used for this molding method | |
| CN109940804B (en) | Method for manufacturing basin-type insulator | |
| CN111463732B (en) | Technological method of integrated bus duct connector | |
| JPH03248809A (en) | Manufacture of cast insulator and casting mold for cast insulator used therefor | |
| JP3699865B2 (en) | Casting device, mold release device, and protective jig | |
| JP5646247B2 (en) | Casting product manufacturing method and mold | |
| JP2012030536A (en) | Casting mold and gas-insulated switchgear | |
| CN210190277U (en) | Mold core local heating device | |
| JPS6271185A (en) | Forming method for cable insulator | |
| JP2005053165A (en) | Hardening method of epoxy resin composition | |
| JP4046319B2 (en) | Casting equipment | |
| JP3463608B2 (en) | Manufacturing method of thermosetting resin molded products | |
| JPS63128916A (en) | Transfer molding equipment | |
| JPH05269766A (en) | Casting mold | |
| JPH04120704A (en) | Mold coil | |
| JPS5940417A (en) | Method of producing bushing | |
| SU752513A1 (en) | Method of manufacturing long articles | |
| JPH0115961B2 (en) | ||
| JP2007038499A (en) | Casting die and casting method | |
| SU1379810A1 (en) | Process of producing ribbed coating | |
| CN115782005A (en) | Composite core rod casting process and casting mold thereof | |
| JPH04234614A (en) | Resin injector | |
| JPH04267112A (en) | Manufacture of molding with thermosetting liquid resin |