JPS59223114A - Manufacture of aluminum pipe containing plastic covered wire body - Google Patents
Manufacture of aluminum pipe containing plastic covered wire bodyInfo
- Publication number
- JPS59223114A JPS59223114A JP9807883A JP9807883A JPS59223114A JP S59223114 A JPS59223114 A JP S59223114A JP 9807883 A JP9807883 A JP 9807883A JP 9807883 A JP9807883 A JP 9807883A JP S59223114 A JPS59223114 A JP S59223114A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- nipple
- plastic
- covered wire
- die
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/005—Continuous extrusion starting from solid state material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/22—Making metal-coated products; Making products from two or more metals
- B21C23/24—Covering indefinite lengths of metal or non-metal material with a metal coating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、アルミニウム管本体内にプラスチック被覆線
条体を収容したプラスチック被覆線条外入りアルミニウ
ム管の製造方法に関するものである０
（従来技術）
従来、プラスチック被覆線条住人シアルミニウアルミニ
ウムテープを逐次アルミニウム管本体としてプラスチッ
ク被覆線条体入りアルミニウム管の連続製造を行ってい
た。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for manufacturing an aluminum tube with a plastic-coated filament outside, in which a plastic-coated filament is housed in an aluminum tube body. ) Conventionally, plastic-coated, filament-filled aluminum tubes have been continuously produced using plastic-coated, filament-filled sialuminium-luminum tape as the aluminum tube body.
しかしながら、このような製造方法では、アルミニウム
管本体がその溶接部分とその他の部分とでは機械的強度
が異なる欠点があシ、また溶接部でピンホールが発生す
る虞れがある等の欠点があった。However, this manufacturing method has drawbacks such as the mechanical strength of the aluminum tube body being different between the welded part and other parts, and the possibility of pinholes occurring in the welded part. Ta.
（発明の目的）
本発明の目的は、アルミニウム管本体がその周方向の機
械的強度が均一で、ピンホールの発生の虞れがなく、シ
かもプラスチック被覆線条体の熱的損傷を防止できるプ
ラスチック被覆線条体入りアルミニウム管の製造方法を
提供するにある。(Objective of the Invention) The object of the present invention is that the aluminum tube body has uniform mechanical strength in the circumferential direction, is free from the possibility of pinholes, and can prevent thermal damage to the plastic-coated filament. The present invention provides a method for manufacturing an aluminum tube containing a plastic-coated filament.
（発明の構成）
本発明は、押出機の押出材料供給用の回転ホイールの周
面に形成された溝と固定シューブロックとの間の管路に
アルミニウム線を供給しつつ、前記回転ホイールの強制
回転に伴う前記アルミニウム線と前記回転ホイールとの
麿擦によって前記アルミニウム線を加熱溶融させて溶融
アルミニウムを得てこれを前記固定シューブロック内の
コンテナ部中に圧入し、前記コンテナ部からダイス・ニ
ップル間に前記溶融アルミニウムを押出してアルミニウ
ム管本体を押出し成形しつつ、前記ニップルの中心孔か
ら前記アルミニウム管本体内にプラスチック被覆線条体
を強制風冷しつつ送り込み、且つ前記ダイス・ニップル
間から押出された前記アルミニウム管本体の外周も強制
冷却してプラスチック被覆金属線入りアルミニウム管を
製造することを特徴とするものである。(Structure of the Invention) The present invention provides a method for supplying an aluminum wire to a conduit between a fixed shoe block and a groove formed on the circumferential surface of a rotating wheel for supplying extruded material of an extruder. The aluminum wire is heated and melted by the friction between the aluminum wire and the rotating wheel as it rotates to obtain molten aluminum, which is press-fitted into a container section in the stationary shoe block, and from the container section to the die nipple. In the meantime, while extruding the molten aluminum to form an aluminum tube body, a plastic-coated filament is fed into the aluminum tube body from the center hole of the nipple while being cooled with forced air, and extruded from between the die and the nipple. The present invention is characterized in that the outer periphery of the aluminum tube body is also forcedly cooled to produce an aluminum tube containing a plastic-coated metal wire.
（実施例）
以下本発明の実施例を図面を参照しつつ詳細に説明する
。図示のように本実施例のプラスチック被覆線条体入り
アルミニウム管の製造方法は、押出機１の押出材料供給
用の回転ホイール２の周面に形成された溝３と、固定シ
ューブロック４との間に管路５にサブライボビ７６から
アルミニウム線（アルミニウム合金線を含む）７を供給
しつつ回転ホイール２の強制回転に伴う摩擦熱で加熱溶
融させ、得られた溶融アルミニウム８を溝３内の一部に
挿入された停止ブロック９０作用で固定シューブロック
４内のコンテナ部１０内に圧入する。(Example) Examples of the present invention will be described in detail below with reference to the drawings. As shown in the figure, the method for manufacturing an aluminum tube containing a plastic-coated filament according to this embodiment involves a groove 3 formed on the circumferential surface of a rotating wheel 2 for supplying extruded material of an extruder 1 and a fixed shoe block 4. In the meantime, the aluminum wire (including aluminum alloy wire) 7 is supplied from the sub-libobi 76 to the conduit 5, and is heated and melted by the frictional heat generated by the forced rotation of the rotary wheel 2. The stop block 90 inserted into the part presses into the container part 10 in the fixed shoe block 4.
コンテナ部１０内に圧入した溶融アルミニウム８はダイ
ス１１とニップル１２との間から押出してアルミニウム
管本体１３を連続的に押出し成形する０このアルミニウ
ム管本体１３内には、ニップル１２の中心孔１２Ａから
プラスチック被覆金属線又はプラスチック被覆光ファイ
バ等の如きプラスチック被覆線条体１４を逐次供給して
プラスチック被神線条体入りアルミニウム管１５を得る
。The molten aluminum 8 press-fitted into the container part 10 is extruded from between the die 11 and the nipple 12 to continuously extrude and form the aluminum tube body 13. A plastic coated filament 14 such as a plastic coated metal wire or a plastic coated optical fiber is sequentially supplied to obtain an aluminum tube 15 containing a plastic coated filament.
プラスチック被覆線条体１４は、サプライボビン１６か
ら案内ロール１７を経て行う。ニップル１２内の中心孔
１２Ａ内には風冷用ノズル１８から圧搾空気を吹き込ん
でプラスチック被覆線条体１４を強制風冷し、ニップル
１ｚを経て伝えられる溶融アルミニウム８の熱でプラス
チック被覆線条体１４が熱的損傷を受けないようにする
。また、ニップル１２の中心孔１２Ａの先端側には、例
えばアスベストのような断熱材からなるスペーサ１９を
申付け、プラスチック被覆線条体１４がニップル１２に
接触しないように保持させる。ダイス１１から出たアル
ミニウム管本体１３の外周にはノズル２０から冷却水を
吹き付けて強制冷却し、その内部のプラスチック被覆線
条体１４を熱から保護する。冷却されたアルミニウム管
本体１３は押、ｔロール２１で押えつつブロアー２２で
水分を吹き飛ばし乾燥させる。乾燥させたアルミニウム
管本体１３は、次に引抜きダイス２３に通し、所 ５
−
要のサイズに減面加工し、図示しない引取機で引取りつ
つ図示しない巻取機で看取る。アルミニウム線７として
は、管の圧縮強度を高めるため０．１〜５重量％のＭｇ
を含むものが好ましく、このときＭｎ、Ｃｖ、Ｃｒ等の
不純物を若干含んでいても差支えない。引抜きダイス２
３は、肉厚増加が比較的少力＜、且つ引抜荷重が小さい
減面率１０〜１５チ、アプローチ角度１０〜３０°のも
のを用いることが好ましい。The plastic-coated filament 14 is supplied from a supply bobbin 16 via a guide roll 17. Compressed air is blown into the center hole 12A in the nipple 12 from the air cooling nozzle 18 to forcefully cool the plastic-coated filament 14, and the plastic-coated filament 14 is cooled by the heat of the molten aluminum 8 transmitted through the nipple 1z. 14 from receiving thermal damage. Further, a spacer 19 made of a heat insulating material such as asbestos is placed on the tip side of the center hole 12A of the nipple 12 to hold the plastic coated filament 14 so that it does not come into contact with the nipple 12. Cooling water is sprayed from a nozzle 20 onto the outer periphery of the aluminum tube body 13 coming out of the die 11 to forcibly cool the aluminum tube body 13, thereby protecting the plastic-coated filament 14 therein from heat. The cooled aluminum tube main body 13 is pressed by a press roll 21 and dried by blowing away moisture with a blower 22. The dried aluminum tube body 13 is then passed through a drawing die 23 and placed at 5
− The surface is reduced to the required size, and while it is taken up by a take-up machine (not shown), it is inspected by a winding machine (not shown). The aluminum wire 7 contains 0.1 to 5% by weight of Mg to increase the compressive strength of the tube.
Preferably, it contains impurities such as Mn, Cv, and Cr. drawing die 2
For No. 3, it is preferable to use a material in which the thickness increase is relatively small, the pull-out load is small, the area reduction is 10 to 15 inches, and the approach angle is 10 to 30 degrees.
このようにして製造されたプラスチック線条体入りアル
ミニウム管、特に光ファイバ入シアルミニウム管は、例
えば架空送電線或は架空地線に撚り込んで光フアイバ複
合架空線等として使用することができる。The plastic filament-containing aluminum tube, particularly the optical fiber-containing aluminum tube, produced in this manner can be twisted into an overhead power transmission line or an overhead ground wire, for example, and used as an optical fiber composite overhead line.
（発明の効果）
以上説明したように本発明に係るプラスチック被覆線条
体入シアルミニウム管の製造方法においては、押出し成
形でアルミニウム管本体内にプラスチック被覆線条体を
供給してプラスチック被覆線条体入シアルミニウム管を
製造するので、アル ６ −
ミニラム管本体はその周方向に機械的強度が均一となり
、且つピンホールの発生の虞れもなく、従来のものより
性能の優れたプラスチック被覆線条体入りアルミニウム
管を容易に製造することができる。特に、本発明では、
ニップルの中心孔内でプラスチック被覆線条体を強制風
冷しているので、溶融アルミニウムの熱でプラスチック
被覆線条体が熱的損傷を受けるのを防止することかで１
五つ液冷とは異ってアルミニウム管本体内に冷却液が入
るのを防止することができる。また、アルミニウム管は
その外側から強制冷却しているので、前述した冷却効果
と相俟って、内部のプラスチック被覆線条体を熱から保
護することができる。(Effects of the Invention) As explained above, in the method for manufacturing a sialuminum tube containing a plastic-coated filament according to the present invention, the plastic-coated filament is supplied into the aluminum tube body by extrusion molding, and the plastic-coated filament is Since the Al6-Miniram tube is manufactured using a sialuminium tube, its mechanical strength is uniform in the circumferential direction, and there is no risk of pinholes forming, making it a plastic-coated wire with superior performance compared to conventional ones. A strip-filled aluminum tube can be easily manufactured. In particular, in the present invention,
Since the plastic-coated filament is forcedly cooled in the center hole of the nipple, it is possible to prevent the plastic-coated filament from being thermally damaged by the heat of molten aluminum.
Unlike liquid cooling, it is possible to prevent cooling liquid from entering the aluminum tube body. In addition, since the aluminum tube is forcibly cooled from the outside, in combination with the above-mentioned cooling effect, the plastic-coated filament inside can be protected from heat.
図面は本発明の方法を実施する装置の一例を示す縦断面
図である。
１・・・押出機、２・・・回転ホイール、３・・・溝、
５・・・固定シューブロック、７・・・アルミニウム線
、８・・・溶融アルミニウム、９・・・停止ブロック、
１０・・・コンテナ部、１１・・・ダイス、１２・・・
ニップル、１２Ａ・・・中心孔、１３・・・アルミニウ
ム管本体、１４・・・プラスチック被覆線条体、１５・
・・プラスチック被覆線条体入シアルミニウム管、１８
・・・風冷用ノズル、１９・・・スペーサ、２０・・・
ノズル。
代理人 弁理士 松 本 英 俊 ・°・≧′。
・、、−ノ′
手続補正書（自発）
昭和５８年７月２５日
特許庁長官若 杉和 夫殿
１、事件の表示
特願昭５８−９８０７８号
（５２９）古河電気工業株式会社
４、代 理 人 〒１０５東ｌＩ７〔都港区新橋４丁
目３１番６号 文山ビル６階 ５、補正の対象
明細書の１特許請求の範囲・」、［発明の詳（１）特許
請求の範囲を別紙の通り訂正する。
１−
（２）第２頁第５行の「条外」を１条体」に訂正する。
（３）第３頁第５行の１するにある。」を「することに
ある。」に訂正する。
（４）第３頁第１２行〜第１３行の「加熱溶融させて溶
融アルミニウムを得てこれを」を削除する。
（５）第３頁第１５行の「溶融」を削除する。
（６）第４頁第１１行〜第１２行の「摩擦熱で加熱溶融
させ、得られた溶融」を「摩擦で」に訂正する。
（７）第４頁第１５行の「浴融」を削除する。
（８）第７頁第７行の「溶融」を削除する。
（９）第７頁第１９行の１溶融」を削除する。
以上
２−
２、特許請求の範囲
押出機の押出材料供給用の回転ホイールの周面に形成さ
れた溝と固定シューブロックとの間の管路にアルミニウ
ム線を供給しつつ、前記回転ホイールの強制回転に伴う
前記アルミニウム線と前記回転ホイールとの摩擦によっ
て前記アルミニウム■前記固定シューブロック内のコン
テナ部中に圧入し、前記コンテナ部からダイス・ニップ
ル間Ｋ １ｍ ＮＱグルミニウムを押出してアルミニウ
ム管本体を押出し成形しつつ、前記ニップルの中心孔か
ら前記アルミニウム管本体内にプラスチック被覆線条体
を強制風冷しつつ送シ込み、且つ前記ダイス・ニップル
間から押出された前記アルミニウム管本体の外周も強制
冷却してプラスチック被覆線条体入りアルミニウム管を
製造することを特徴とするプラスチック被覆線条体入シ
アルミニウム管の製造方法。The drawing is a longitudinal sectional view showing an example of an apparatus for carrying out the method of the present invention. 1... Extruder, 2... Rotating wheel, 3... Groove,
5... Fixed shoe block, 7... Aluminum wire, 8... Molten aluminum, 9... Stop block,
10... Container part, 11... Dice, 12...
Nipple, 12A... Center hole, 13... Aluminum tube body, 14... Plastic coated filament, 15.
...Sialuminum tube with plastic coated filament, 18
...Air cooling nozzle, 19...Spacer, 20...
nozzle. Agent: Hidetoshi Matsumoto, patent attorney ・°・≧′.・、、－ノ' Procedural amendment (voluntary) July 25, 1980 Kazuo Wakasugi, Commissioner of the Japan Patent Office 1, Case Indication Patent Application No. 58-98078 (529) Furukawa Electric Co., Ltd. 4, Representative 105 Higashi II7 [6th floor, Bunzan Building, 4-31-6 Shinbashi, Miyakominato-ku 5. Claim 1 of the specification to be amended], [Details of the invention (1) Claims attached hereto Correct as follows. 1- (2) In the 5th line of page 2, ``outside the article'' is corrected to ``1 article.'' (3) It's on page 3, line 5, number 1. ” should be corrected to “It is to do.” (4) Delete "Make molten aluminum by heating and melting it" from lines 12 to 13 on page 3. (5) Delete "melting" in line 15 of page 3. (6) On page 4, lines 11 and 12, "melting obtained by heating and melting with frictional heat" is corrected to "by friction." (7) Delete "Yukyu" on page 4, line 15. (8) Delete "melting" from page 7, line 7. (9) Delete "1 melting" on page 7, line 19. 2-2. Claims While supplying an aluminum wire to a conduit between a fixed shoe block and a groove formed on the circumferential surface of a rotating wheel for supplying extruded material of an extruder, the rotating wheel is forced to Due to the friction between the aluminum wire and the rotating wheel as it rotates, the aluminum is press-fitted into the container section in the fixed shoe block, and the aluminum tube body is extruded by extruding the NQ gluminium between the die and the nipple from the container section. While forming, the plastic-coated filament is fed into the aluminum tube body from the center hole of the nipple while being forcedly cooled, and the outer periphery of the aluminum tube body extruded from between the die and the nipple is also forcedly cooled. 1. A method for manufacturing a sialuminum tube containing a plastic-coated filament, the method comprising manufacturing an aluminum tube containing a plastic-coated filament.
Claims (1)
れた溝と固定シューブロックとの間の管路にアルミニウ
ム線を供給しつつ、前記回転ホイールの強制回転に伴う
前記アルミニウム線と前記回転ホイールとの摩擦によっ
て前記アルミニウム線を加熱溶融させて溶融アルミニウ
ムを得てこれを前記固定シューブロック内のコンテナ部
中に圧入し、前記コンテナ部からダイス・ニップル間に
前記溶融アルミニウムを押出してアルミニウム管本体を
押出し成形しつつ、前記ニップルの中心孔から前記アル
ミニウム管本体内にプラスチック被覆線条体を強制風冷
しつつ送９込み、且つ前記ダイス・ニップル間から押出
された前記アルミニウム管本体の外周も強制冷却してプ
ラスチック被覆線条体入りアルミニウム管を製造するこ
とを特徴とするプラスチック被覆線条体入りアルミニウ
ム管の製造方法。While supplying the aluminum wire to the conduit between the fixed shoe block and the groove formed on the surface of the rotating wheel for supplying extruded material of the extruder, the aluminum wire and the rotating wheel are forced to rotate as the rotating wheel is forced to rotate. The aluminum wire is heated and melted by friction with the aluminum wire to obtain molten aluminum, which is press-fitted into the container section of the fixed shoe block, and the molten aluminum is extruded from the container section between the die and the nipple to form the aluminum tube body. While extruding and molding, the plastic coated filament is fed into the aluminum tube body through the center hole of the nipple while being cooled with forced air, and the outer periphery of the aluminum tube body extruded from between the die and the nipple is also fed. 1. A method for producing an aluminum tube containing a plastic-coated filament, which comprises manufacturing an aluminum tube containing a plastic-coated filament by forced cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9807883A JPS59223114A (en) | 1983-06-03 | 1983-06-03 | Manufacture of aluminum pipe containing plastic covered wire body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9807883A JPS59223114A (en) | 1983-06-03 | 1983-06-03 | Manufacture of aluminum pipe containing plastic covered wire body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59223114A true JPS59223114A (en) | 1984-12-14 |
| JPH0339766B2 JPH0339766B2 (en) | 1991-06-14 |
Family
ID=14210309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9807883A Granted JPS59223114A (en) | 1983-06-03 | 1983-06-03 | Manufacture of aluminum pipe containing plastic covered wire body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59223114A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61127815U (en) * | 1985-01-25 | 1986-08-11 | ||
| JPS61195969A (en) * | 1985-02-25 | 1986-08-30 | Sumitomo Heavy Ind Ltd | Continuous treatment device for stock in atmosphere |
| EP0202953A2 (en) * | 1985-05-24 | 1986-11-26 | Babcock Wire Equipment Limited | Continuous extrusion apparatus |
| US5197319A (en) * | 1991-12-05 | 1993-03-30 | Brazeway, Inc. | Extrusion apparatus for sheathing a temperature sensitive core material |
| CN104148429A (en) * | 2014-06-24 | 2014-11-19 | 苏州古河电力光缆有限公司 | Seamless airtight aluminum pipe optical unit and manufacturing method thereof |
| CN109365555A (en) * | 2018-11-21 | 2019-02-22 | 贵州正合博莱金属制品有限公司 | A kind of aluminium alloy extrusions low temperature crushing failure at high speed method |
| CN111940536A (en) * | 2020-07-24 | 2020-11-17 | 江苏亨通电力智网科技有限公司 | Method for manufacturing aluminum-coated invar wire |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284537B (en) * | 2011-08-11 | 2013-04-24 | 西北工业大学 | Device for plastically forming microelement and method for forming microelement by utilizing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4214660Y1 (en) * | 1964-08-14 | 1967-08-22 | ||
| JPS56132303A (en) * | 1980-03-21 | 1981-10-16 | Sumitomo Electric Ind Ltd | Production of optical fiber cable |
-
1983
- 1983-06-03 JP JP9807883A patent/JPS59223114A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4214660Y1 (en) * | 1964-08-14 | 1967-08-22 | ||
| JPS56132303A (en) * | 1980-03-21 | 1981-10-16 | Sumitomo Electric Ind Ltd | Production of optical fiber cable |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61127815U (en) * | 1985-01-25 | 1986-08-11 | ||
| JPH022486Y2 (en) * | 1985-01-25 | 1990-01-22 | ||
| JPS61195969A (en) * | 1985-02-25 | 1986-08-30 | Sumitomo Heavy Ind Ltd | Continuous treatment device for stock in atmosphere |
| JPH0413422B2 (en) * | 1985-02-25 | 1992-03-09 | Sumitomo Heavy Industries | |
| EP0202953A2 (en) * | 1985-05-24 | 1986-11-26 | Babcock Wire Equipment Limited | Continuous extrusion apparatus |
| EP0202953A3 (en) * | 1985-05-24 | 1989-03-15 | Babcock Wire Equipment Limited | Continuous extrusion apparatus |
| US5197319A (en) * | 1991-12-05 | 1993-03-30 | Brazeway, Inc. | Extrusion apparatus for sheathing a temperature sensitive core material |
| WO1993010922A1 (en) * | 1991-12-05 | 1993-06-10 | Brazeway, Inc. | Extrusion apparatus for sheathing a temperature sensitive core material |
| CN104148429A (en) * | 2014-06-24 | 2014-11-19 | 苏州古河电力光缆有限公司 | Seamless airtight aluminum pipe optical unit and manufacturing method thereof |
| CN109365555A (en) * | 2018-11-21 | 2019-02-22 | 贵州正合博莱金属制品有限公司 | A kind of aluminium alloy extrusions low temperature crushing failure at high speed method |
| CN111940536A (en) * | 2020-07-24 | 2020-11-17 | 江苏亨通电力智网科技有限公司 | Method for manufacturing aluminum-coated invar wire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0339766B2 (en) | 1991-06-14 |
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