JPS6391211A - Preparation of multilayer rubber molding - Google Patents
Preparation of multilayer rubber moldingInfo
- Publication number
- JPS6391211A JPS6391211A JP61236795A JP23679586A JPS6391211A JP S6391211 A JPS6391211 A JP S6391211A JP 61236795 A JP61236795 A JP 61236795A JP 23679586 A JP23679586 A JP 23679586A JP S6391211 A JPS6391211 A JP S6391211A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- rubber layer
- mold
- layer
- outermost
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010068 moulding (rubber) Methods 0.000 title abstract 3
- 238000002360 preparation method Methods 0.000 title 1
- 229920001971 elastomer Polymers 0.000 claims abstract description 82
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing Of Terminals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は例えば電力ケーブルの接続部に使用される差込
式絶縁筒の如き多層状に一体に成形されたゴムモールド
製品の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a multi-layered, integrally molded rubber product, such as a plug-in insulating tube used for the connection of a power cable, for example. It is.
（従来技術及び解決しようとする問題点）込式絶紛筒の
一例の上半分縦断面をあられした側面図である。図面に
おいて、（１）はケーブルの外部導電層に電気的に接続
される外部導電ゴム層、■は絶縁ゴム層、（３）はケー
ブルの導体接続部の電界緩和のための内部導電ゴム層で
あり、これらのゴム層は例えばエチレン−プロピレンゴ
ム等により形成されている。(Prior Art and Problems to Be Solved) FIG. 1 is a side view showing a vertical section of the upper half of an example of an included type absolute powder cylinder. In the drawing, (1) is an outer conductive rubber layer that is electrically connected to the outer conductive layer of the cable, ■ is an insulating rubber layer, and (3) is an inner conductive rubber layer for mitigating the electric field at the conductor connection part of the cable. These rubber layers are made of, for example, ethylene-propylene rubber.
このような絶縁筒の形成は、まず内部導電ゴム層（３）
を金型により成形し、その上に別の金型を用いて絶縁ゴ
ム層■を成形し、さらにその上に別の金型を用いて外部
導電ゴム層中を成形し加硫して一体化するか、又は内部
導電ゴム層（３）上に絶縁ゴムテープを巻回し、その」
二に外部導電ゴムテープを巻回し、全体を金型内に収納
して成形一体化する等の方法で製作していた。The formation of such an insulating cylinder begins with the internal conductive rubber layer (3).
is molded using a mold, an insulating rubber layer ■ is molded on top of it using another mold, and then the outer conductive rubber layer is molded on top of that using another mold and vulcanized to integrate. Or, wrap an insulating rubber tape over the internal conductive rubber layer (3).
Second, an external conductive rubber tape was wrapped around it, and the whole was housed in a mold and molded into one piece.
しかし、前者の形成方法は絶縁筒を形成する各ゴム層（
１）■■毎に別個の金型を必要とするばかりでなく成形
に多（の時間を要するという問題点があり、後者の方法
はテープの手巻き作業のため］二数がかかる他、熟練を
必要とするという問題点があった。However, the former method of forming each rubber layer (
1) Not only does it require a separate mold for each type, but it also requires a lot of time to form. The problem was that it required .
成形機を用い、未加硫のゴム材料を直接金型内に注入し
加硫する形成方法が採用されるようになった。しかし、
このような方法によるときは、内部導電ゴム層（３）及
び絶縁ゴム層■は形成できるが、最外層の外部導電ゴム
層（１）は肉厚が薄いので、絶縁ゴム層■」二に外部導
電ゴムをｔｌ：入すると、注入時の圧力で絶縁ゴム層■
が変形し、外部導電ゴム層（１）が均一な厚さに成形出
来ないという問題点がある。A forming method in which unvulcanized rubber material is directly injected into a mold and vulcanized using a molding machine has come to be adopted. but,
When using such a method, the inner conductive rubber layer (3) and the insulating rubber layer can be formed, but since the outermost outer conductive rubber layer (1) is thin, the insulating rubber layer When conductive rubber is inserted, the pressure at the time of injection creates an insulating rubber layer.
There is a problem that the outer conductive rubber layer (1) cannot be molded to a uniform thickness.
（問題点を解決するための手段）
本発明は」二連の問題点を解消した多層ゴムモールド製
品の製造方法を提供するもので、その特徴は、あらかじ
め最外層ゴム層を成形しておき、金型内に１−記最外層
ゴム層をセットしてその内部に内層ゴムを注入して成形
一体化することにある。(Means for Solving the Problems) The present invention provides a method for manufacturing multilayer rubber molded products that solves the two problems. The method consists of setting the outermost rubber layer (1) in a mold, injecting the inner rubber layer into the outermost rubber layer, and integrally molding the layer.
第２図（イ）〜（ハ）は第１図の差込式絶縁筒を本発明
の製造方法により形成する手順の説明図である。FIGS. 2(A) to 2(C) are explanatory diagrams of the procedure for forming the plug-in insulating cylinder of FIG. 1 by the manufacturing method of the present invention.
層に１）及び外部導電ゴム層（１）を射出成形機により
別途形成しておく。この際、外部導電ゴム層（１）には
金型（６）（同図ハ参照）のゴム注入孔■に連通ずる注
入孔（４）を１〜数ケ所設けておく。このようにあらか
じめ形成した内部導電ゴム層（３）及び外部導電ゴム層
（＋１を芯金０に挿通して金型（６）内にセットし、−
に記金７（＋１のゴム注入孔■及び外部導電ゴム層（１
）の注入孔（４）を通じて、外部導電ゴム層（１）内に
絶縁ゴムを注入して成形し加硫して一体化し第１図の如
き差込式絶縁筒を得る。Layer 1) and outer conductive rubber layer (1) are separately formed using an injection molding machine. At this time, the outer conductive rubber layer (1) is provided with one to several injection holes (4) communicating with the rubber injection holes (2) of the mold (6) (see C in the figure). The inner conductive rubber layer (3) and the outer conductive rubber layer (+1) previously formed in this way are inserted into the core metal 0 and set in the mold (6), and -
Mark 7 (+1 rubber injection hole ■ and outer conductive rubber layer (1
) Insulating rubber is injected into the outer conductive rubber layer (1) through the injection hole (4), molded, and vulcanized to be integrated to obtain a plug-in insulating tube as shown in FIG.
なお、上記説明は差込式絶縁筒を例にとって行なったが
、これに限定されるものではなく、その地条層状に一体
に成形されたゴムモールド製品に広く適用できることは
いうまでもない。It should be noted that although the above description has been made using a plug-in insulating tube as an example, it is not limited to this, and it goes without saying that the present invention can be widely applied to rubber molded products integrally molded in the form of striations.
（作用）
上述した本発明の製造方法によれば射出成形機で生産す
る利点を生かし、しかも肉厚の薄い外部導電ゴム層を先
に作り、その中に絶縁ゴムを注入して絶縁ゴム層を形成
するので変形することがなく、製造することができる。(Function) According to the manufacturing method of the present invention described above, the advantages of production using an injection molding machine are utilized, and a thin external conductive rubber layer is first formed, and insulating rubber is injected into it to form an insulating rubber layer. Because it is formed, it does not deform and can be manufactured.
一緒に追いやられて先端に空気溜りができてアバタ状に
なることが考えられるが、外部導電ゴム層の先端付近に
ガス抜き孔を設けておくことによって解決できる。又絶
縁ゴムの注入圧力で内部導電ゴム層が変形することも考
えられるが、該ゴム層の厚みを厚くするとか、内周をパ
フがけして芯金とのスリップを防止するようにすればよ
い。さらに注入するゴムの流れで外部導電ゴム層の注入
孔イ・１近が変形することも考えられるが、注入孔付近
のゴム層を金型に係合させる等の措置をとればよい。It is conceivable that air pockets may be formed at the tip of the outer conductive rubber layer, resulting in an avatar-like shape, but this can be resolved by providing a gas vent hole near the tip of the outer conductive rubber layer. It is also possible that the internal conductive rubber layer may be deformed by the injection pressure of the insulating rubber, but the rubber layer may be made thicker or the inner periphery may be puffed to prevent slipping with the core metal. . Furthermore, it is conceivable that the injection hole A-1 of the external conductive rubber layer may be deformed due to the flow of the injected rubber, but measures such as engaging the rubber layer near the injection hole with the mold may be taken.
（発明の効果）
−に二連した本発明の多層ゴムモールド製品の製造方法
によれば、射出成形機で生産できるので工数減がはかれ
て生産性が向上すると共に、最外層ゴム層を先に作り内
層ゴムをその中に注入するので内層ゴムの変形がなく、
品質的にも安定したゴム第１図は電力ケーブルの接続部
に使用される差込式絶縁筒の一例のに半分縦断面をあら
れした側面図、第２図（イ）〜←は第１図の差込式絶縁
筒を本発明の製造方法により形成する手順の説明図であ
る。(Effects of the Invention) According to the method for manufacturing a multilayer rubber molded product of the present invention, which is combined with -, it can be produced using an injection molding machine, reducing the number of man-hours and improving productivity. Since the inner layer rubber is injected into it, there is no deformation of the inner layer rubber.
Stable rubber in terms of quality Figure 1 is a side view with a half vertical cross section of an example of a plug-in insulating tube used for power cable connections, and Figures 2 (A) to ← are Figure 1. FIG. 3 is an explanatory diagram of the procedure for forming the plug-in insulating tube according to the manufacturing method of the present invention.
１・・・外部導電ゴム層、２・・・絶縁ゴム層、３・・
・内部導電ゴム層、４，７・・・ゴム注入孔、５・・・
芯金、６・・・金型。1... External conductive rubber layer, 2... Insulating rubber layer, 3...
・Inner conductive rubber layer, 4, 7...Rubber injection hole, 5...
Core metal, 6...mold.
Claims (3)
造方法において、あらかじめ最外層ゴム層を成形してお
き、金型内に上記最外層ゴム層をセットしてその内部に
内部層ゴムを注入して成形一体化することを特徴とする
多層ゴムモールド製品の製造方法。(1) In a method for manufacturing a rubber mold product that is integrally molded into a multilayered structure, the outermost rubber layer is molded in advance, the outermost rubber layer is set in a mold, and the inner rubber layer is placed inside the outermost rubber layer. A method for producing a multilayer rubber mold product characterized by injection and integral molding.
孔を設けてあることを特徴とする特許請求の範囲第１項
記載の多層ゴムモールド製品の製造方法。(2) The method for manufacturing a multilayer rubber molded product according to claim 1, wherein the outermost rubber layer is provided with an injection hole communicating with a rubber injection hole of the mold.
用される差込式絶縁筒であり、あらかじめ金型のゴム注
入孔に連通する注入孔を有する外部導電ゴム層を成形し
ておき、金型内に上記外部導電ゴム層をセットしてその
内部に内部層の絶縁ゴムを注入して成形一体化すること
を特徴とする特許請求の範囲第１項記載の多層ゴムモー
ルド製品の製造方法。(3) The multilayer rubber mold product is a plug-in insulating tube used for power cable connections, and an external conductive rubber layer with an injection hole communicating with the rubber injection hole of the mold is pre-molded, and the mold 2. The method of manufacturing a multilayer rubber molded product according to claim 1, wherein the outer conductive rubber layer is set inside the outer conductive rubber layer, and the inner layer of insulating rubber is injected into the inner layer and integrally molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61236795A JPS6391211A (en) | 1986-10-03 | 1986-10-03 | Preparation of multilayer rubber molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61236795A JPS6391211A (en) | 1986-10-03 | 1986-10-03 | Preparation of multilayer rubber molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6391211A true JPS6391211A (en) | 1988-04-21 |
Family
ID=17005904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61236795A Pending JPS6391211A (en) | 1986-10-03 | 1986-10-03 | Preparation of multilayer rubber molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6391211A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005522323A (en) * | 2002-04-10 | 2005-07-28 | トーマス アンド ベッツ インターナショナル，インク． | Lubricant coating and application process for elastomer electrical cable accessories |
| JP2016021843A (en) * | 2014-07-16 | 2016-02-04 | 株式会社ビスキャス | Rubber insulator and manufacturing method thereof |
| US10483730B2 (en) | 2015-07-06 | 2019-11-19 | Nkt Hv Cables Gmbh | Method of building an insulation system around a naked conductor section of a power cable |
-
1986
- 1986-10-03 JP JP61236795A patent/JPS6391211A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005522323A (en) * | 2002-04-10 | 2005-07-28 | トーマス アンド ベッツ インターナショナル，インク． | Lubricant coating and application process for elastomer electrical cable accessories |
| JP2016021843A (en) * | 2014-07-16 | 2016-02-04 | 株式会社ビスキャス | Rubber insulator and manufacturing method thereof |
| US10483730B2 (en) | 2015-07-06 | 2019-11-19 | Nkt Hv Cables Gmbh | Method of building an insulation system around a naked conductor section of a power cable |
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