JP2531629B2 - Video and / or television wire manufacturing method - Google Patents
Video and / or television wire manufacturing methodInfo
- Publication number
- JP2531629B2 JP2531629B2 JP61133863A JP13386386A JP2531629B2 JP 2531629 B2 JP2531629 B2 JP 2531629B2 JP 61133863 A JP61133863 A JP 61133863A JP 13386386 A JP13386386 A JP 13386386A JP 2531629 B2 JP2531629 B2 JP 2531629B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- copper
- video
- temperature
- television
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 本発明はビデオ又はテレビ用電線の製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of making a wire for a video or television.
特に結晶粒の大きいものが一時に容易に得ることがで
きるためビデオ又はテレビ用電線の製造に適した方法に
関する。In particular, the present invention relates to a method suitable for manufacturing an electric wire for a video or a television, since a large crystal grain can be easily obtained at one time.
ビデオ又はテレビ用電線においては、通常の無酸素銅
の伸線材が使用されているが、高品質テレビ、ビデオ等
において、鮮明な画像を得るためには、結晶粒の大きい
銅線が好ましい。A normal wire drawing material of oxygen-free copper is used for an electric wire for a video or a television, but a copper wire having a large crystal grain is preferable in order to obtain a clear image in a high quality television, a video and the like.
従来、鋳型のほぼ全長を溶融金属の温度以上に加熱し
て一方向凝固組織をもつ金属を連続鋳造するいわゆるOC
C法が知られているが、この方法では凝固界面が鋳型の
出口側に位置するためにブレークアウトが起こり易い。
したがって、この方法でビデオ又はテレビ用電線を製造
するには安定生産の面で難がある。Conventionally, a so-called OC is used to continuously cast a metal having a unidirectionally solidified structure by heating almost the entire length of the mold above the temperature of molten metal
Although the C method is known, in this method, the solidification interface is located on the outlet side of the mold, so that breakout easily occurs.
Therefore, it is difficult to manufacture a video or television wire by this method in terms of stable production.
したがって、本発明はブレークアウトが起こり難い鋳
造法で一方向凝固組織をもつビデオ又はテレビ用銅電線
を製造する方法を提供するものである。Accordingly, the present invention provides a method of manufacturing a copper wire for video or television having a unidirectionally solidified structure by a casting method in which breakout does not easily occur.
即ち、本発明は、 （１）熱良導体の、但し銅よりは熱伝導性が低い鋳型の
一端部全てが溶融金属浴に突出し、他端部は冷却構造体
に接し、前記一端部と前記他端部の間は保温構造である
装置を用いて、前記鋳型の一端が金属の融点より十分高
い温度に加熱される温度に前記溶融金属を保持し、前記
鋳型の入口側にダミーバーの先端を位置させ、かつ前記
溶融金属の凝固界面が前記鋳型の入口側に位置しかつ該
凝固界面が端面方向で平坦になる速度で引抜を行うこと
により、一方向凝固した無酸素銅もしくは高純度銅の鋳
塊を鋳造し、該鋳塊を伸線処理することを特徴とするビ
デオ又はテレビ用電線の製造方法、 （２）前記鋳型の保温構造の周囲に設けられた保温用発
熱体により鋳型を加熱して、鋳型の温度を外気温度に対
して一定に保つことを特徴とする上記（１）記載の方
法，及び （３）鋳型の冷却構造体の溶融銅側から、鋳型壁面に不
活性ガス及び又は中性ガスを吹き込むことを特徴とする
上記（１）又は（２）記載の方法に関する。That is, the present invention is: (1) All of one end of a mold having good thermal conductivity, but having lower thermal conductivity than copper, projects into the molten metal bath, the other end contacts the cooling structure, and the one end and the other Using a device having a heat retaining structure between the ends, the molten metal is held at a temperature at which one end of the mold is heated to a temperature sufficiently higher than the melting point of the metal, and the tip of the dummy bar is positioned on the inlet side of the mold. And unidirectionally solidified oxygen-free copper or high-purity copper is cast by drawing at a speed at which the solidification interface of the molten metal is located on the inlet side of the mold and the solidification interface is flat in the end face direction. A method for producing an electric wire for a video or television, which comprises casting an ingot and subjecting the ingot to a wire drawing treatment, (2) heating the mold with a heat-retaining heating element provided around the heat-retaining structure of the mold. Keep the mold temperature constant with respect to the outside temperature. (3) The method described in (1) above, and (3) the above-mentioned (1) characterized in that an inert gas and / or a neutral gas is blown into the mold wall surface from the molten copper side of the cooling structure of the mold. (2) The method described above.
以下本発明について詳細に述べる。 The present invention will be described in detail below.
本発明が適用される銅は無酸素銅又は高純度銅であ
る。The copper to which the present invention is applied is oxygen-free copper or high-purity copper.
本発明において、鋳型の一端は全体を溶融銅浴に突出
させることにより溶融銅の熱により鋳型を加熱するもの
である。このことにより溶融銅の温度以上には鋳型が過
剰加熱されないために、鋳造過程の制御が確実になる。
溶融銅の温度は、鋳造が容易になりかつ鋳型が金属の融
点より十分に高い温度に加熱されるような温度、例えば
約125℃である。In the present invention, one end of the mold is designed to be heated by the heat of the molten copper by projecting the entire end into the molten copper bath. This ensures control of the casting process because the mold is not overheated above the temperature of the molten copper.
The temperature of the molten copper is such that it is easy to cast and the mold is heated to a temperature well above the melting point of the metal, for example about 125 ° C.
さらに鋳型の他端は冷却構造体に接した構造である。
鋳型の一方を加熱し他端を冷却することにより一方向凝
固を好ましく行い得るものである。加えて、鋳型の入口
側で凝固界面を保持できるようにすることが必要であ
り、例えば冷却構造体を溶融金属溶解炉の炉壁内に配置
することにより、冷却構造体による奪熱を熱の良導体で
ある銅棒を伝ってかつ短い距離で行うと、凝固は鋳型入
口側で起こり、鋳型出口部で溶融銅は全く存在しなくな
る。したがってブレークアウトのない連続鋳造が可能と
なるものである。Further, the other end of the mold is in contact with the cooling structure.
Unidirectional solidification can be preferably performed by heating one of the molds and cooling the other end. In addition, it is necessary to maintain the solidification interface on the inlet side of the mold. For example, by arranging the cooling structure in the furnace wall of the molten metal melting furnace, the heat removal by the cooling structure can be prevented. When conducted through a copper rod which is a good conductor and at a short distance, solidification occurs at the mold inlet side, and molten copper does not exist at the mold outlet side. Therefore, continuous casting without breakout is possible.
鋳型の一端部と他端部の間は冷却構造体と接しない保
温構造とすることにより鋳型の一端と他端の間の温度勾
配を大きくする。保温構造としては、好ましくは鋳型全
周を囲む保温用発熱体を設けてもよく、この場合は鋳型
の温度が外気に左右されなくなる。The temperature gradient between one end and the other end of the mold is increased by providing a heat retaining structure that does not contact the cooling structure between the one end and the other end of the mold. As the heat retaining structure, a heat retaining heating element preferably surrounding the entire circumference of the mold may be provided. In this case, the temperature of the mold does not depend on the outside air.
本発明においては、鋳塊の引抜き速度は凝固界面が平
坦になるような遅い速度とすることにより、一方向凝固
を可能とし、結晶粒の非常に大きい鋳造組織を得ること
ができるものである。In the present invention, the drawing speed of the ingot is set to a slow speed at which the solidification interface becomes flat, whereby unidirectional solidification is possible and a casting structure with very large crystal grains can be obtained.
また、本発明においては連続鋳造の開始時に使用され
るダミーバーの先端を鋳型の入口側に位置させることに
より平坦な凝固界面をもって鋳造した金属を、その状態
を維持したまま引き抜くことにより鋳塊全体を上記の鋳
造組織とする。次にこれを引き抜くことによりビデオ、
テレビ用電線として好ましい組織をもつものを得ること
ができる。Further, in the present invention, the metal cast by the flat solidification interface by positioning the tip of the dummy bar used at the start of continuous casting on the inlet side of the mold, the whole ingot by pulling out while maintaining that state The above casting structure is used. Next, pull out this video,
It is possible to obtain a TV wire having a preferable structure.
さらに、鋳型の材料としては、銅よりは熱伝導性が良
くないが、窒素珪素、炭化珪素、グラファイト等などの
耐火物の中では熱良導体を使用することにより溶融金属
の熱を効率的に鋳型に伝えるようにする必要がある。Further, as a material for the mold, the heat conductivity is not better than that of copper, but in a refractory material such as silicon nitride, silicon carbide, graphite, etc., by using a good thermal conductor, the heat of the molten metal can be efficiently transferred. Need to tell.
また、鋳型の冷却構造体の溶融銅浴側から、鋳型壁面
に不活性ガス及び又は中性ガスを吹き込む構造とする。
この構造とすることにより、凝固したインゴット中の不
純物の偏析を防止し、溶融銅の温度を均一に保持するも
のである。上記ガスは少なくとも溶融銅の鋳型への入口
部の溶体を攪拌混合する役割をなすものである。冷却構
造体に接した鋳型の部分より、少なくとも鋳型の入口側
から送入できる構造であることが好ましい。Further, an inert gas and / or a neutral gas is blown into the wall surface of the mold from the molten copper bath side of the cooling structure of the mold.
With this structure, segregation of impurities in the solidified ingot is prevented, and the temperature of the molten copper is kept uniform. The gas serves to stir and mix at least the molten solution at the inlet of the molten copper into the mold. It is preferable that the structure is such that it can be fed from at least the inlet side of the mold from the part of the mold that is in contact with the cooling structure.
さらに、本発明方法に用いる鋳造装置は、溶解炉又は
保持炉の下部に鋳型を設けたもの、あるいは、溶解炉又
は保持炉の側壁横に鋳型を設けたものであっても良い。Further, the casting apparatus used in the method of the present invention may be one in which a mold is provided in the lower part of the melting furnace or holding furnace, or one in which the mold is provided beside the side wall of the melting furnace or holding furnace.
以上のように本発明を実施することにより、以下の効
果を得ることができる。By carrying out the present invention as described above, the following effects can be obtained.
（１）再加熱をしなくとも、一時に結晶粒が大きく、ビ
デオ又はテレビ用電線に適した銅線、又は銅線母材を得
ることができる。(1) It is possible to obtain a copper wire or a copper wire base material which has large crystal grains at one time and is suitable for an electric wire for video or television without reheating.
（２）一方向凝固のものが得られるため、線引も容易に
できる。(2) Since a unidirectionally solidified product is obtained, wire drawing can be easily performed.
（３）本法で得られる電線をビデオ又はテレビ用の銅線
として用いることにより、高品質の画像を得ることがで
きる。(3) By using the electric wire obtained by this method as a copper wire for video or television, a high quality image can be obtained.
（４）特に本発明は、テレビ会議等に用いる大きい画像
等において鮮明度を出す場合に好ましい。(4) The present invention is particularly preferable when a sharpness is obtained in a large image or the like used for a video conference.
（５）ブレークアウトが起こらない。(5) Breakout does not occur.
以下、実施例によりさらに詳しく本発明を説明する。 Hereinafter, the present invention will be described in more detail with reference to examples.
実施例１ 第１図に示した装置を用いて実施した。Example 1 It carried out using the apparatus shown in FIG.
溶解炉（２）底部側壁に取り付けた11mm径の孔を有す
るグラファイト鋳型（６）に外径10.6mmの純銅棒をダミ
ーバーとして溶融金属（１）供給側より1cm内側に位置
させた。A pure copper rod with an outer diameter of 10.6 mm was placed as a dummy bar 1 cm inside from the supply side of the molten metal (1) in a graphite mold (6) having a hole of 11 mm diameter attached to the bottom wall of the melting furnace (2).
炉には、溶融された無酸素銅50kgを入れ1250℃に保持
した。溶融金属供給側と反対側で炉壁内に設置された冷
却構造体（５）に８／分の水を通じ、純銅の凝固位置
を鋳型内の溶融金属供給側に設定した。The furnace was charged with 50 kg of molten oxygen-free copper and kept at 1250 ° C. 8 / min of water was passed through the cooling structure (5) installed in the furnace wall on the side opposite to the molten metal supply side, and the solidification position of pure copper was set to the molten metal supply side in the mold.
グラファイト鋳型に、第１図に示すごとくN2ガスを
（４）より導入し、鋳造ロッド（３）の表面を覆いつつ
溶融金属中へ噴出させた。溶融金属を攪拌し、温度およ
び金属成分のバラツキをなくす働きをなした。尚、N2ガ
スが溶融金属側のみに放出されるよう、ガスシール
（８）を設けた。As shown in FIG. 1, N 2 gas was introduced into the graphite mold from (4), and was sprayed into the molten metal while covering the surface of the casting rod (3). The molten metal was stirred to serve to eliminate variations in temperature and metal components. A gas seal (8) was provided so that N 2 gas was released only to the molten metal side.
凝固したロッドを20mm/分でピンチロール（７）によ
り、連続的に引抜いた。The solidified rod was continuously withdrawn by a pinch roll (7) at 20 mm / min.
この結果得られた無酸素銅は一方向凝固組織を有し、
鋳塊の長さ方向に伸びる幾つかの円柱状形態の結晶粒の
直系で測定した各結晶粒は大きさが２〜5mmφと極めて
大きいものであった。また表面は滑らかなものであっ
た。この鋳塊を0.6mmφに伸線し、テレビ用銅線として
用いたところ、好ましい画像を見ることができた。The oxygen-free copper obtained as a result has a unidirectionally solidified structure,
The size of each crystal grain measured in the direct system of several columnar crystal grains extending in the length direction of the ingot was extremely large, 2 to 5 mmφ. The surface was smooth. When this ingot was drawn to have a diameter of 0.6 mm and used as a copper wire for a television, a preferable image could be seen.
さらに、同様の条件で鋳造した高純度銅の一方向凝固
鋳塊の伸線材はさらに結晶粒が大きく好ましい画像であ
った。Further, the wire drawing material of the unidirectionally solidified ingot of high-purity copper cast under the same conditions had a larger crystal grain, which was a preferable image.
実施例２ 第２図の装置においても実施例１と同様に鋳造を行っ
たところ好ましい一方向凝固のロッドが得られ、これを
同様な伸線加工しテレビ用に使用したところ実施例１と
同様の結果が得られた。Example 2 In the apparatus shown in FIG. 2 as well, casting was carried out in the same manner as in Example 1 to obtain a preferable unidirectionally solidified rod, which was subjected to similar wire drawing and used for a television as in Example 1. The result was obtained.
第１図は、横型連続鋳造に適用された本発明の実施例を
説明する図である。 第２図は、下向きの連続鋳造装置に適用された本発明の
実施例を説明する図である （１）は溶融銅、（２）は溶解炉、（３）は鋳造ロッ
ド、（４）はN2ガス導入口、（５）は冷却構造体、
（６）はグラファイト鋳型である。FIG. 1 is a diagram for explaining an embodiment of the present invention applied to horizontal continuous casting. FIG. 2 is a diagram for explaining an embodiment of the present invention applied to a downward continuous casting apparatus. (1) is molten copper, (2) is a melting furnace, (3) is a casting rod, and (4) is N 2 gas inlet, (5) cooling structure,
(6) is a graphite mold.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−87956（ＪＰ，Ａ) 特開 昭58−179541（ＪＰ，Ａ) 特開 昭52−142625（ＪＰ，Ａ) 特開 昭57−181746（ＪＰ，Ａ) 特開 昭60−72646（ＪＰ，Ａ) ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-60-87956 (JP, A) JP-A-58-179541 (JP, A) JP-A-52-142625 (JP, A) JP-A-57- 181746 (JP, A) JP-A-60-72646 (JP, A)
Claims (3)
鋳型の一端部全てが溶融金属浴に突出し、他端部は冷却
構造体に接し、前記一端部と前記他端部の間は保温構造
である装置を用いて、前記鋳型の一端が金属の融点より
十分高い温度に加熱される温度に前記溶融金属を保持
し、前記鋳型の入口側にダミーバーの先端を位置させ、
かつ前記溶融金属の凝固界面が前記鋳型の入口側に位置
しかつ該凝固界面が断面方向で平坦になる速度で引抜を
行うことにより、一方向凝固した無酸素銅もしくは高純
度銅の鋳塊を鋳造し、該鋳塊を伸線処理することを特徴
とするビデオ又はテレビ用電線の製造方法。1. A good thermal conductor, but one end of a mold having a lower thermal conductivity than copper protrudes into a molten metal bath, the other end contacts a cooling structure, and the space between the one end and the other end. Is using a device having a heat retaining structure, holds the molten metal at a temperature at which one end of the mold is heated to a temperature sufficiently higher than the melting point of the metal, and positions the tip of the dummy bar on the inlet side of the mold,
And the solidification interface of the molten metal is located on the inlet side of the mold and by drawing at a rate at which the solidification interface becomes flat in the cross-sectional direction, a unidirectionally solidified ingot of oxygen-free copper or high-purity copper is obtained. A method for manufacturing an electric wire for a video or television, which comprises casting and subjecting the ingot to a wire drawing treatment.
れた保温用発熱体により鋳型を加熱して、鋳型の温度を
外気温度に対して一定に保つことを特徴とする特許請求
の範囲第１項記載のビデオ又はテレビ用電線の製造方
法。2. The temperature of the mold is kept constant with respect to the outside air temperature by heating the mold with a heat-generating heating element provided around the heat insulating structure of the mold. A method of manufacturing an electric wire for a video or television set forth in item 1.
面に不活性ガス及び又は中性ガスを吹き込むことを特徴
とする特許請求の範囲第１項又は第２項記載のビデオ又
はテレビ用電線の製造方法。3. The video or television according to claim 1 or 2, wherein an inert gas and / or a neutral gas is blown into the wall surface of the mold from the molten copper side of the cooling structure of the mold. Method for manufacturing electric wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61133863A JP2531629B2 (en) | 1986-06-11 | 1986-06-11 | Video and / or television wire manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61133863A JP2531629B2 (en) | 1986-06-11 | 1986-06-11 | Video and / or television wire manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62291806A JPS62291806A (en) | 1987-12-18 |
| JP2531629B2 true JP2531629B2 (en) | 1996-09-04 |
Family
ID=15114809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61133863A Expired - Lifetime JP2531629B2 (en) | 1986-06-11 | 1986-06-11 | Video and / or television wire manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2531629B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01311508A (en) * | 1988-06-09 | 1989-12-15 | Furukawa Electric Co Ltd:The | Material and manufacture of contact point |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52142625A (en) * | 1976-05-24 | 1977-11-28 | Oumi Shindo Kk | Continuous casting method of metal |
| JPS5671347U (en) * | 1979-10-29 | 1981-06-12 | ||
| JPS57181746A (en) * | 1981-04-30 | 1982-11-09 | Mitsubishi Electric Corp | Graphite mold and continuous casting method using this mold |
-
1986
- 1986-06-11 JP JP61133863A patent/JP2531629B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62291806A (en) | 1987-12-18 |
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