JPS5834883B2 - The best way to get started - Google Patents

The best way to get started

Info

Publication number
JPS5834883B2
JPS5834883B2 JP48094059A JP9405973A JPS5834883B2 JP S5834883 B2 JPS5834883 B2 JP S5834883B2 JP 48094059 A JP48094059 A JP 48094059A JP 9405973 A JP9405973 A JP 9405973A JP S5834883 B2 JPS5834883 B2 JP S5834883B2
Authority
JP
Japan
Prior art keywords
molding material
lubricating oil
die
ultra
high voltage
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
Application number
JP48094059A
Other languages
Japanese (ja)
Other versions
JPS5043485A (en
Inventor
光男 柿沼
浄 高橋
正毅 松井
泰夫 松井
正明 大辻
武夫 福田
五十二 茂木
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.)
Mitsubishi Petrochemical Co Ltd
Original Assignee
Mitsubishi Petrochemical Co Ltd
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 Mitsubishi Petrochemical Co Ltd filed Critical Mitsubishi Petrochemical Co Ltd
Priority to JP48094059A priority Critical patent/JPS5834883B2/en
Priority to DE2439492A priority patent/DE2439492C3/en
Priority to SU742055846A priority patent/SU1007561A3/en
Priority to GB36918/74A priority patent/GB1480632A/en
Priority to FR7428842A priority patent/FR2241855B1/fr
Publication of JPS5043485A publication Critical patent/JPS5043485A/ja
Priority to US05/689,348 priority patent/US4091064A/en
Publication of JPS5834883B2 publication Critical patent/JPS5834883B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/145—Pretreatment or after-treatment
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2301/00—Use of unspecified macromolecular compounds as reinforcement
    • B29K2301/10—Thermosetting resins

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Organic Insulating Materials (AREA)

Description

【発明の詳細な説明】 本発明は架橋性成形材料を押出成形して架橋成形品を製
造する方法に係り、特に超高圧ケーブル（電線）を長尺
ランドダイスを用いて製造する方法に関するものであっ
て、この場合に必要とされる潤滑油の供給位置に特徴を
有するものである。Detailed Description of the Invention The present invention relates to a method of manufacturing a crosslinked molded product by extrusion molding a crosslinkable molding material, and particularly relates to a method of manufacturing an ultra-high voltage cable (electric wire) using a long land die. The lubricating oil supply position required in this case is unique.

一般に、架橋性成形材料を電線に被覆し、これを長尺ラ
ンドダイスを用いて押出成形し架橋絶縁被覆ケーブルを
製造する方法は公知である。Generally, a method of manufacturing a crosslinked insulated cable by coating an electric wire with a crosslinkable molding material and extruding it using a long land die is known.

この方法において成形過程にダイスの長尺ランド部が存
在することに基づく高圧力のもとて成形品を長尺ランド
部内を円滑に移行させかつ円滑な移行を長時間に亘って
確保するために潤滑油を長尺ランド部からランド部内面
とそこを通過する成形品との間に供給することも公知で
ある。In this method, due to the presence of the long land portion of the die during the molding process, high pressure is applied to smoothly transfer the molded product within the long land portion and to ensure smooth transition over a long period of time. It is also known to supply lubricating oil from an elongated land between the inner surface of the land and the molded product passing therethrough.

公称耐電圧６６ ＫＶ以下あるいは絶縁被覆厚み２０ｍ
ｙｔｔ未漢の汎用グーブルを上記の方法により製造する
場合は、絶縁層の厚さが薄く成形材料の搬送圧力が高い
ので、ケーブル表面を損うことも、ランド部の内面に焼
付き成形不能となるおそれも少ない。Nominal withstand voltage 66 KV or less or insulation coating thickness 20 m
When YTT's general-purpose gooble is manufactured by the above method, the thickness of the insulating layer is thin and the pressure of conveying the molding material is high, so there is no risk of damaging the cable surface or burning the inner surface of the land, making molding impossible. There is little chance of it happening.

しかしながら最近の電力需要の大幅な増加に伴ない、公
称耐電圧１５４ＫＶあ疎性２７５ ＫＶクラスの超高圧
ケーブルへの要望が強まり、本発明者などがこのクラス
の超高圧ケーブルの開発を試みたところ、ダイス内面へ
の焼付きを起こしてケーブル表面が粗悪になり、製品の
商品価値を著るしく損なうことが判明した。However, with the recent significant increase in electric power demand, there has been a growing demand for ultra-high voltage cables with a nominal withstand voltage of 154 KV and an apacity of 275 KV, and the inventors and others attempted to develop ultra-high voltage cables in this class. It was found that this caused the inner surface of the die to seize, resulting in a poor quality cable surface and significantly reducing the commercial value of the product.

また、長時間に亘り超高圧ケーブルを製造する場合には
、焼付いた架橋性成形材料により成形品表面に凹凸が形
成され、潤滑油の供給されている長尺ランドダイス内で
、流動性を有する潤滑油が凹面に追いやられ、成形品の
凸面で潤滑油が枯渇する現象が発生するので、枯渇した
成形品の部分がダイス内面に焼付き、最終的には成形不
能となる欠点を生じることが判った。In addition, when manufacturing ultra-high voltage cables over a long period of time, the baked cross-linked molding material forms irregularities on the surface of the molded product, and it becomes fluid in a long land die supplied with lubricating oil. The lubricating oil is pushed to the concave surface and the lubricating oil is depleted on the convex surface of the molded product, so the depleted part of the molded product is sewn onto the inner surface of the die, eventually causing a defect that makes molding impossible. understood.

本発明者などがその原因を種々検討した結果、公称耐電
圧が６６ＫＶより大きいケーブル特こ公称耐電圧が１５
４ＫＶ、２７５ＫＶクラスの超高圧ケーブルあるいは絶
縁被覆厚みが２０ｍｍ１）−１上のケーブルの製造では
、絶縁層の厚さが厚く潤滑油の供給部に至る以前のラン
ド部分で著るしく絶縁層の厚み方向に速度勾配が発生し
、長尺ランド部分の内面附近の成形材料の流れ速度が電
線附近の流れ速度よりも遅くなるためであることをつき
とめた。As a result of various studies by the inventors and others on the causes of this, we found that the cables with a nominal withstand voltage higher than 66 KV have a nominal withstand voltage of 15 KV.
When manufacturing 4KV, 275KV class ultra-high voltage cables or cables with an insulation coating thickness of 20mm1)-1, the insulation layer is thick and the thickness of the insulation layer is noticeably thicker at the land area before reaching the lubricating oil supply section. It was found that this is because a velocity gradient occurs in the direction, and the flow velocity of the molding material near the inner surface of the long land portion is slower than the flow velocity near the electric wire.

さらには、潤滑油をクロスヘッド部より供給すると、潤
滑油の成形材料への巻き込みが起り、耐電圧を下げ、実
質的に超高圧ケーブルの製造が不可能となる。Furthermore, if lubricating oil is supplied from the crosshead portion, the lubricating oil will be entrapped in the molding material, lowering the withstand voltage and making it virtually impossible to manufacture ultra-high voltage cables.

本発明は上記の点を考慮して成形材料の搬送圧力が低く
なる長尺ランド部およびクロスヘッド部からの潤滑油の
供給を避け、搬送圧力の高い樹脂道路テーパ部から搬送
圧力以上の圧力で潤滑油を供給すればよいことに着目し
てなされたものである。In consideration of the above points, the present invention avoids supplying lubricating oil from the long land portion and cross head portion where the conveyance pressure of the molding material is low, and supplies lubricating oil from the resin road tapered portion where the conveyance pressure is high to a pressure higher than the conveyance pressure. This was done by focusing on the fact that it is only necessary to supply lubricating oil.

以下図面によって本発明の一実施例を説明する。An embodiment of the present invention will be described below with reference to the drawings.

図面において１はクロスヘッド、２はニップル、３はク
ロスヘッド１に対しダイスホルダ４を介して接続された
長尺ランド部３ａを有するダイスで、長尺ランド部３ａ
の手前に設けられたテーパ一部３ｂで２分割されている
。In the drawings, 1 is a crosshead, 2 is a nipple, and 3 is a die having a long land portion 3a connected to the crosshead 1 via a die holder 4.
It is divided into two parts by a tapered part 3b provided in front of it.

その分割面の外側は環状のバッキング５によりシールさ
れており、その内側には、ダイスホルダ４に設けた潤滑
油受入穴６に連通ずる環状の潤滑油室７が設けられてい
てこれよりテーパー内面３′に至る供給用スリット８が
形成されている。The outside of the split surface is sealed by an annular backing 5, and the inside thereof is provided with an annular lubricating oil chamber 7 that communicates with a lubricating oil receiving hole 6 provided in the die holder 4. A supply slit 8 is formed that extends to '.

９はクロスヘッド１への架橋性成形材料受入口で、この
受入口９に絶縁体供給装置（図示せず）により成形材料
１０が供給される。Reference numeral 9 denotes a crosslinkable molding material receiving port into the crosshead 1, and a molding material 10 is supplied to this receiving port 9 by an insulator supply device (not shown).

しかして送出装置（図示せず）によりクロスヘッド１中
に電線（導体）１１を連続して供給し、絶縁体供給装置
（図示せず）によって受入口９より架橋性成形材料１０
を供給する。Then, the electric wire (conductor) 11 is continuously fed into the crosshead 1 by a sending device (not shown), and the crosslinkable molding material 10 is fed from the receiving port 9 by an insulator feeding device (not shown).
supply.

この成形材料１０と、テーパー内面３′間に、加圧型潤
滑剤供給装置（図示せず）によって受入穴６より室７お
よびスリット８を通して潤滑油１２を成形材料１０の流
れ方向に対して鈍角で、かつ円周方向に均等に供給しつ
つ、電線１１に成形材料１０を被覆し、このケーブル成
形品を長尺ランド部３ａを移動させて架橋反応を終了し
、冷却管（図示せず）により冷却した後、巻取装置（図
示せず）により巻取るものである。A pressurized lubricant supply device (not shown) supplies lubricating oil 12 between the molding material 10 and the tapered inner surface 3' from the receiving hole 6 through the chamber 7 and the slit 8 at an obtuse angle to the flow direction of the molding material 10. , and while supplying the molding material 10 evenly in the circumferential direction, the wire 11 is coated with the molding material 10, and the long land portion 3a of this cable molded product is moved to complete the crosslinking reaction, and then the cable molded product is coated with the molding material 10 through a cooling pipe (not shown). After cooling, it is wound up using a winding device (not shown).

この場合、搬送圧力の高い部分、すなわちテーパー内面
３′と成形材料１０との間に供給された潤滑油１２によ
り滑性が付与されているので、ケーブル成形品は、搬送
圧力の低下した長尺ランド部りａ内も焼付くことなく滑
らかに移動することになる。In this case, the lubricating oil 12 supplied between the part where the conveying pressure is high, that is, the tapered inner surface 3' and the molding material 10 provides lubricity, so that the cable molded product can be made into a long length with a low conveying pressure. It also moves smoothly within the land area a without seizing.

なお、本発明における架橋性成形材料は、架橋可能なも
のであればよく、たとえば、アミノプラスト、フェノプ
ラスト、エポキシ樹脂、不飽和ポリエステル樹脂その他
の熱硬化性樹脂、架橋剤を配合した熱可塑性樹脂或いは
ゴムなどであり、また潤滑剤としては、ポリオキシアル
キレン等の界面活性剤、脂肪酸、脂肪酸アミド、カルボ
ン酸のエステル等が適当である。The crosslinkable molding material in the present invention may be any material that can be crosslinked, such as aminoplast, phenoplast, epoxy resin, unsaturated polyester resin, other thermosetting resins, and thermoplastic resins containing crosslinking agents. Alternatively, the lubricant may be a surfactant such as polyoxyalkylene, a fatty acid, a fatty acid amide, a carboxylic acid ester, or the like.

上述のように本発明によれば、ダイスの長尺ランド部の
手前に設けられた樹脂道路テーパ一部よりそのテーパー
内面と架橋性成形材料との間に潤滑油を成形材料の流れ
方向に対して鈍角で、かつ円周方向に均等に供給するよ
うに改良して、ダイスの長尺ランド部内で発生する速度
勾配を低減し、長尺ランド部の内面附近の成形材料の流
れをよくしたので長尺ランド部の内面に成形材料が焼付
き、成形不能となることを防止できるばかりでなく、潤
滑油の供給を成形材料の流れ方向に対して鈍角で行なう
ことにより、成形材料が潤滑油の供給装置側に侵入して
潤滑油の供給を妨げるようなこともなく、表面の滑らか
な超高圧ケーブルを製造することができる。As described above, according to the present invention, lubricating oil is applied between the tapered inner surface and the crosslinkable molding material from a portion of the resin road taper provided in front of the long land portion of the die in the flow direction of the molding material. The molding material is supplied at an obtuse angle and evenly in the circumferential direction, reducing the velocity gradient that occurs within the long land of the die and improving the flow of the molding material near the inner surface of the long land. Not only can this prevent the molding material from seizing on the inner surface of the long land, making molding impossible, but by supplying lubricating oil at an obtuse angle to the flow direction of the molding material, the molding material can absorb the lubricating oil. It is possible to manufacture an ultra-high voltage cable with a smooth surface without the lubricating oil entering the supply device side and interfering with the supply of lubricating oil.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明方法を実施するための装置の一例を一部を
断面で示した正面図である。 ３・・・長尺ランド部３ａを有するダイス、３ｂ・・・
テーパ一部、３′・・・そのテーパー内面、１０・・・
架橋性成形材料、１２・・・潤滑油。The drawing is a partially sectional front view of an example of an apparatus for carrying out the method of the present invention. 3...Dice having a long land portion 3a, 3b...
Part of the taper, 3'...The inner surface of the taper, 10...
Crosslinkable molding material, 12...Lubricating oil.

Claims (1)

【特許請求の範囲】[Claims] １ 長尺ランドダイスを用い、該ダイス内架橋により実
質的に架橋の完了した絶縁被覆層を有する超高圧ケーブ
ルを製造するに当り、ケーブル表面を滑かにして押出す
ため、上記ダイスの長尺ランド部の手前に設けられた樹
脂道路テーパ一部よりそのテーパー内面と架橋性成形材
料との間（こ、潤滑油を成形材料の流れ方向に対して鈍
角で、かつ円周方向に均等に供給することを特徴とする
超高圧ケーブルの製造方法。1. When producing an ultra-high voltage cable having an insulating coating layer that has been substantially crosslinked by crosslinking within the die using a long land die, the long land die is used to extrude the cable surface with a smooth surface. From a part of the resin road taper provided in front of the land part, lubricating oil is supplied between the tapered inner surface and the crosslinkable molding material at an obtuse angle to the flow direction of the molding material and evenly in the circumferential direction. A method for manufacturing an ultra-high voltage cable, characterized by:
JP48094059A 1973-08-22 1973-08-22 The best way to get started Expired JPS5834883B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP48094059A JPS5834883B2 (en) 1973-08-22 1973-08-22 The best way to get started
DE2439492A DE2439492C3 (en) 1973-08-22 1974-08-17 Method and device for manufacturing an electrical cable
SU742055846A SU1007561A3 (en) 1973-08-22 1974-08-21 Apparatus for insulating cable articles by extruding vulcanizable polyoleffins
GB36918/74A GB1480632A (en) 1973-08-22 1974-08-22 Process and apparatus for producing electric cable insulated with cured polyolefin
FR7428842A FR2241855B1 (en) 1973-08-22 1974-08-22
US05/689,348 US4091064A (en) 1973-08-22 1976-05-24 Process for producing electric cable insulated with cured polyolefin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48094059A JPS5834883B2 (en) 1973-08-22 1973-08-22 The best way to get started

Publications (2)

Publication Number Publication Date
JPS5043485A JPS5043485A (en) 1975-04-19
JPS5834883B2 true JPS5834883B2 (en) 1983-07-29

Family

ID=14099952

Family Applications (1)

Application Number Title Priority Date Filing Date
JP48094059A Expired JPS5834883B2 (en) 1973-08-22 1973-08-22 The best way to get started

Country Status (5)

Country Link
JP (1) JPS5834883B2 (en)
DE (1) DE2439492C3 (en)
FR (1) FR2241855B1 (en)
GB (1) GB1480632A (en)
SU (1) SU1007561A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223788A (en) * 1984-04-05 1985-11-08 エフ・エム・シー・コーポレーシヨン Platform fixture for crane

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO156679C (en) * 1983-09-23 1987-11-04 Soennichsen Roervalseverk DEVICE FOR PLASTIC EXTRUSTS.
DE3933028C2 (en) * 1989-09-29 1998-01-22 Siemens Ag Crosshead for the production of cable insulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223788A (en) * 1984-04-05 1985-11-08 エフ・エム・シー・コーポレーシヨン Platform fixture for crane

Also Published As

Publication number Publication date
DE2439492C3 (en) 1978-05-24
DE2439492B2 (en) 1977-09-29
JPS5043485A (en) 1975-04-19
FR2241855B1 (en) 1980-10-31
FR2241855A1 (en) 1975-03-21
DE2439492A1 (en) 1975-03-06
SU1007561A3 (en) 1983-03-23
GB1480632A (en) 1977-07-20

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