JPH11254093A - Production of aluminum plate using continuous casting and rolling apparatus - Google Patents
Production of aluminum plate using continuous casting and rolling apparatusInfo
- Publication number
- JPH11254093A JPH11254093A JP5668598A JP5668598A JPH11254093A JP H11254093 A JPH11254093 A JP H11254093A JP 5668598 A JP5668598 A JP 5668598A JP 5668598 A JP5668598 A JP 5668598A JP H11254093 A JPH11254093 A JP H11254093A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- plate
- notch
- continuous casting
- casting
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アルミニウム板形
成用連続鋳造圧延装置を用いるアルミニウム板の製造方
法及びアルミニウム板形成用連続鋳造圧延装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an aluminum plate using a continuous casting and rolling device for forming an aluminum plate and a continuous casting and rolling device for forming an aluminum plate.
【０００２】[0002]
【従来の技術】連続鋳造圧延装置は、感光性平版印刷版
の平版印刷版用支持体の製造に用いられており、特開平
8-49034 号公報や特開平8-73974 号公報に開示されるよ
うに、アルミニウム合金の溶湯を溶湯供給ノズルから一
対の回転ロール間に供給して、一対の回転ロールの回転
によって前記溶湯を鋳造圧延して鋳造板を形成する装置
である。しかしながら、特開平8-49034 号公報や特開平
8-73974 号公報に記載の連続鋳造圧延装置では、アルミ
ニウム合金の溶湯に結晶微細化材として添加されるTiB2
の粒子が途中で凝集しやすく、この凝集したTiB2の粒子
によって鋳造板の表面に筋が断続的に発生するという問
題がある。鋳造板の良否は感光性平版印刷版を製造する
上で重要な要件であり、特に、機械的な粗面化、化学的
な粗面化、あるいは電気化学的粗面化を行うと、この筋
が顕著に表面化して問題となるため、筋の発生を防止す
る必要がある。これに対して、特開昭60-230944 号公報
や特願平8-207222に記載の装置では、溶湯をセラミック
チューブフィルターに通過させてTiB2の粒子を除去して
いるが、長時間運転を行うとセラミックチューブフィル
タの隙間を粗大なTiB2の粒子がすり抜ける確率が増加す
るため、根本的な解決にはならない。また、結晶微細化
材としてTiB2を添加しない場合には、鋳造組織が不均一
になり、機械的強度がばらついたり、ストリークが発生
しやすくなり、板の外観を損ねるという不具合が生じ
る。2. Description of the Related Art A continuous casting and rolling apparatus is used for producing a lithographic printing plate support for a photosensitive lithographic printing plate.
As disclosed in JP-A-8-49034 and JP-A-8-73974, a molten aluminum alloy is supplied between a pair of rotating rolls from a molten metal supply nozzle, and the molten metal is cast by rotation of the pair of rotating rolls. This is a device that forms a cast plate by rolling. However, Japanese Patent Application Laid-Open Nos.
In the continuous casting and rolling apparatus described in JP-A-8-73974, TiB 2 is added as a crystal refining material to a molten aluminum alloy.
Are likely to agglomerate on the way, and the agglomerated TiB 2 particles cause intermittent streaks on the surface of the cast plate. The quality of a cast plate is an important factor in the production of a photosensitive lithographic printing plate. Particularly, when mechanical, chemical, or electrochemical surface roughening is performed, However, it is necessary to prevent the occurrence of streaks because the surface becomes noticeable and becomes a problem. In contrast, in the apparatus described in JP 60-230944 JP and Hei 8-207222 is passed through a molten metal to a ceramic tube filter is removed the particles of TiB 2, a long-term operation Doing so increases the probability of coarse TiB 2 particles slipping through the gaps in the ceramic tube filter, and is not a fundamental solution. Further, when TiB 2 is not added as a crystal refining material, the casting structure becomes non-uniform, the mechanical strength varies, streaks easily occur, and the appearance of the plate is impaired.
【０００３】[0003]
【発明が解決しようとする課題】従って、本発明は、凝
集したTiB2粒子に起因する筋のないアルミニウム板の製
造方法及び該製造方法に用いるアルミニウム板形成用連
続鋳造圧延装置を提供することを目的とする。[SUMMARY OF THE INVENTION Accordingly, the present invention is to provide a continuous casting and rolling apparatus for the aluminum plate formed to be used in the production method and the production method of the muscle without the aluminum plate due to the agglomerated TiB 2 particles Aim.
【０００４】[0004]
【課題を解決する為の手段】上記目的は、溶湯を溶湯供
給ノズルから鋳造圧延手段に供給し、前記鋳造圧延手段
にて前記溶湯を鋳造圧延して鋳造板を形成するアルミニ
ウム板形成用連続鋳造圧延装置において、前記溶湯が前
記溶湯供給ノズルまで流れる流路の底面に、流路に対し
て前方向の上端部に切欠を有する凹部を形成して、前記
溶湯に含まれる凝集したTiB2粒子を前記凹部に沈降させ
て除去することを特徴とするアルミニウム板形成用連続
鋳造圧延装置を用いるアルミニウム板の製造方法及び該
装置により達成される。SUMMARY OF THE INVENTION It is an object of the present invention to provide a continuous casting method for forming an aluminum plate in which a molten metal is supplied from a molten metal supply nozzle to a casting and rolling means, and the molten metal is cast and rolled by the casting and rolling means to form a cast plate. In a rolling device, a recess having a notch at an upper end in a forward direction with respect to the flow path is formed on a bottom surface of a flow path through which the molten metal flows to the molten metal supply nozzle, and aggregated TiB 2 particles contained in the molten metal are formed. The present invention is attained by a method for manufacturing an aluminum plate using a continuous casting and rolling device for forming an aluminum plate, wherein the device is settled and removed in the concave portion, and the apparatus is achieved.
【０００５】本発明によれば、溶湯が流路に沿って溶湯
供給ノズルまで流れる際に、溶湯に含まれる凝集したTi
B2粒子が、流路の底面に形成された凹部に沈降し、除去
される。この時、溶湯の流れ方向に対して、凹部前方向
の上端部に切欠を形成することにより、溶湯中の凝集し
たTiB2粒子を容易に且つ確実に除去することができると
共に、凹部入口付近に生じる滞留を抑制することで、滞
留部にTiB2粒子が集まって凝集することを防止できる。
切欠を有せず、凹部の壁面が流路底面に対して垂直であ
る場合にも、凝集したTiB2粒子は凹部へ沈降し、TiB2粒
子の混入によるアルミニウム板の筋発生は減少するが、
長時間運転を行い、鋳造処理量が多くなると、TiB2の粒
子のアルミニウム板への混入が起こり、筋がやはり発生
する。これは、凹部入口付近に生じる滞留部にTiB2粒子
が凝集し、溶湯の流れが乱れた時に下流に流れ出すため
であると考えられる。また、流れ方向に対して凹部後ろ
方向の上端部にも切欠を有することにより、大量に溶湯
を処理した場合にもさらに確実に凝集したTiB2粒子が除
去され、好ましい。本発明のアルミニウム板形成用連続
鋳造圧延装置を用いることにより、凝集したTiB2粒子が
鋳造圧延手段に供給されないため、鋳造板にTiB2起因の
筋が発生しないので、表面品質の高い感光性平版印刷版
を製造することができる。According to the present invention, when the molten metal flows along the flow path to the molten metal supply nozzle, the aggregated Ti contained in the molten metal is
B 2 particles settle in a recess formed in the bottom surface of the channel, is removed. At this time, by forming a notch at the upper end in the forward direction of the concave portion with respect to the flow direction of the molten metal, the aggregated TiB 2 particles in the molten metal can be easily and reliably removed, and at the vicinity of the concave portion entrance. By suppressing the generated stagnation, it is possible to prevent the TiB 2 particles from collecting and aggregating in the stagnation portion.
Even when there is no notch and the wall surface of the concave portion is perpendicular to the channel bottom surface, the aggregated TiB 2 particles settle in the concave portion, and the streaking of the aluminum plate due to the mixing of the TiB 2 particles is reduced,
If the operation is performed for a long time and the throughput of casting increases, TiB 2 particles are mixed into the aluminum plate, and streaks are also formed. This is considered to be because the TiB 2 particles aggregate in the stagnant portion generated near the entrance of the concave portion and flow out downstream when the flow of the molten metal is disturbed. In addition, it is preferable that the notch is also provided at the upper end in the direction behind the concave portion with respect to the flow direction, so that the coagulated TiB 2 particles can be more reliably removed even when a large amount of molten metal is treated. By using the continuous casting and rolling device for forming an aluminum plate of the present invention, the aggregated TiB 2 particles are not supplied to the casting and rolling means, so that no streaks due to TiB 2 are generated on the cast plate, so that a photosensitive lithographic plate having a high surface quality can be obtained. Printing plates can be manufactured.
【０００６】[0006]
【発明の実施の形態】以下添付図面に従って、本発明に
係る連続鋳造圧延装置の好ましい実施の形態について詳
説する。図１は、本実施の形態の連続鋳造圧延装置の全
体構成を示す説明図である。同図に示すように、連続鋳
造圧延装置10は、主として溶解保持炉12、樋14、溶湯供
給ノズル16、一対の回転ローラ18、18、及びコイラー20
を備えている。溶解保持炉12には、アルミニウム合金の
インゴットが溶解された溶湯22が溜められる。溶解保持
炉12は溶解保持炉傾動機24を備えており、溶解保持炉傾
動機24の電動モーター駆動によって傾動され、溶解保持
炉12内に溜められた溶湯22が樋14に注入される。溶湯22
が注入される樋14の底面には、後述する切欠を有する凹
部30が形成されている。また、樋14には樋14内の液位を
検出するレベル計32が設けられ、このレベル計32は、制
御装置34を介して溶解保持炉傾動機24に接続されてい
る。制御装置34は、レベル計32の検出液位に基づいて溶
解保持炉傾動機24を制御して樋14内の液位を調整する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a continuous casting and rolling apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an explanatory diagram showing the entire configuration of the continuous casting and rolling device of the present embodiment. As shown in FIG. 1, the continuous casting and rolling apparatus 10 mainly includes a melting and holding furnace 12, a gutter 14, a molten metal supply nozzle 16, a pair of rotating rollers 18, 18, and a coiler 20.
It has. In the melting and holding furnace 12, a molten metal 22 in which an ingot of an aluminum alloy is melted is stored. The melting and holding furnace 12 is provided with a melting and holding furnace tilting machine 24, which is tilted by driving an electric motor of the melting and holding furnace tilting machine 24, and the molten metal 22 stored in the melting and holding furnace 12 is injected into the gutter 14. Melt 22
A recess 30 having a notch described below is formed on the bottom surface of the gutter 14 into which the gas is injected. Further, the gutter 14 is provided with a level gauge 32 for detecting a liquid level in the gutter 14, and the level gauge 32 is connected to a melting and holding furnace tilting machine 24 via a control device 34. The control device 34 controls the melting and holding furnace tilting machine 24 based on the detected liquid level of the level meter 32 to adjust the liquid level in the gutter 14.
【０００７】溶湯供給ノズル16は、前記樋14の図中右端
に設けられ、樋14内の溶湯22を図中右方向に吐出する。
一対の回転ローラ18、18は、溶湯供給ノズル16の先端部
を挟んで図中上下方向に配設され、溶湯供給ノズル16か
ら吐出された溶湯22をその回転によって鋳造圧延して鋳
造板36を形成すると共に、形成された鋳造板36を挟持し
て搬送する。コイラー20は、一対の回転ローラ18、18に
よって搬送される鋳造板36を巻き取る。また、必要に応
じて切断機38によって鋳造板36を切断してもよい。The molten metal supply nozzle 16 is provided at the right end of the gutter 14 in the figure, and discharges the molten metal 22 in the gutter 14 to the right in the figure.
A pair of rotating rollers 18, 18 are disposed vertically in the figure with the tip of the molten metal supply nozzle 16 interposed therebetween, and cast and roll the molten metal 22 discharged from the molten metal supply nozzle 16 by its rotation to form a casting plate 36. While being formed, the formed cast plate 36 is pinched and transported. The coiler 20 winds the casting plate 36 conveyed by the pair of rotating rollers 18,18. Further, if necessary, the cast plate 36 may be cut by the cutting machine 38.
【０００８】図２は、図１に示された切欠を有する凹部
30を形成する樋14の一部を示す拡大斜視図である。同図
に示すように、切欠を有する凹部30は第１の耐火部材42
と第２の耐火部材44とが組み合わされて形成される。図
３は図２に示された樋14の一部の正面図であり、図４は
図３の４−４断面図である。第１の耐火部材42と第２の
耐火部材44とは切欠を有する凹状に形成され、ねじ孔4
6、46、46が各々の対向する位置に形成される。各ねじ
孔46、46、46にはボルト47、47、47が螺合され、第１の
耐火部材42と第２の耐火部材44とが締結される。第１の
耐火部材42には図４中左端面が閉塞された上部に切欠を
有する溝43が形成され、第２の耐火部材44には図４中右
端面が閉塞された溝45が形成される。溝43と溝45とは合
わさって切欠を有する凹部30が形成される。凹部の構造
は図２、３、４記載の構造には限定されず、本願の主旨
を満たせばどのような構造のものを用いてもよい。FIG. 2 shows a recess having the notch shown in FIG.
FIG. 2 is an enlarged perspective view showing a part of a gutter 14 forming 30. As shown in the figure, the recess 30 having the notch is provided with the first refractory member 42.
And the second refractory member 44 are formed in combination. FIG. 3 is a front view of a part of the gutter 14 shown in FIG. 2, and FIG. 4 is a sectional view taken along line 4-4 of FIG. The first refractory member 42 and the second refractory member 44 are formed in a concave shape having a notch, and the screw holes 4 are formed.
6, 46, 46 are formed at respective opposing positions. Bolts 47, 47, 47 are screwed into the screw holes 46, 46, 46, and the first refractory member 42 and the second refractory member 44 are fastened. The first refractory member 42 is formed with a groove 43 having a notch in the upper part whose left end face in FIG. 4 is closed, and the second refractory member 44 is formed with a groove 45 whose right end face in FIG. 4 is closed. You. The groove 43 and the groove 45 are combined to form a recess 30 having a notch. The structure of the recess is not limited to the structure shown in FIGS. 2, 3, and 4, and any structure may be used as long as the gist of the present application is satisfied.
【０００９】図４に示される４−４断面図における切欠
部の形状は、切欠部高さが10mm以上であり、切欠部幅が
5mm 以上であることが好ましい。切欠部高さが10mmより
低いか、又は切欠部幅が5mm より小さい場合には、アル
ミニウム板に筋が発生する。これは溶湯が、流れ方向に
対して凹部の前部壁面にぶつかり、淀みが発生したり、
うず流が発生して、凝集TiB2粒子の沈降が十分に起こら
ないためと考えられる。また、流れ方向に対して凹部の
後ろ上端部にも切欠を有することにより、さらに完全凝
集したTiB2粒子等の不純物の除去を行うことができ、好
ましい。この後ろ上端部の切欠部の形状としては、切欠
部高さが10mm以上であり、切欠部幅が5mm 以上であるこ
とが好ましい。切欠を有する凹部の全体的な形状におい
て、凹部の深さ（凹部低面部から流路底面部までの高
さ）は流路の深さの２〜５倍であることが好ましい。凹
部の深さが流路の深さの５倍を超える場合は、装置が大
きくなりすぎ鋳造終了後の溶湯の除去がむずかしいの
で、現実的ではない。また、凹部の深さが浅い場合には
粗大なTiB2粒子を含め、種々の不純物の再浮上が起こり
やすく、鋳造板の筋の発生が起こる。また、凹部の流れ
方向の開口部長さ（流れ方向における凹部開口部の最長
部分）は流路の深さの１〜１０倍であることが好まし
い。凹部の開口部長さが１０倍を超えると装置が大きく
なりすぎ鋳造終了後の凹部に残る溶湯（アルミ) のロス
分が多くなるため現実的ではない。また、開口部長さが
十分長くないと凝集したTiB2粒子の十分な沈降が起こら
ず、鋳造板の筋の発生が起こる。The shape of the notch in the sectional view taken along line 4-4 shown in FIG. 4 has a notch height of 10 mm or more and a notch width of notch.
It is preferably at least 5 mm. If the notch height is less than 10 mm or the notch width is less than 5 mm, streaks are formed on the aluminum plate. This is because the molten metal hits the front wall of the recess in the flow direction, causing stagnation,
It is considered that the vortex is generated and sedimentation of the aggregated TiB 2 particles does not sufficiently occur. In addition, it is preferable that a notch is also provided at the rear upper end portion of the concave portion in the flow direction, so that impurities such as TiB 2 particles which are completely aggregated can be further removed. As the shape of the notch at the rear upper end, the notch height is preferably 10 mm or more, and the notch width is preferably 5 mm or more. In the overall shape of the recess having the notch, the depth of the recess (the height from the lower surface of the recess to the bottom of the flow channel) is preferably 2 to 5 times the depth of the flow channel. If the depth of the concave portion exceeds five times the depth of the flow path, the apparatus becomes too large and it is difficult to remove the molten metal after the casting is completed, which is not practical. When the depth of the concave portion is small, re-floating of various impurities including coarse TiB 2 particles easily occurs, and streaks of the cast plate occur. The length of the opening in the flow direction of the recess (the longest portion of the opening of the recess in the flow direction) is preferably 1 to 10 times the depth of the flow path. If the opening length of the concave portion exceeds 10 times, the apparatus becomes too large, and the loss of the molten metal (aluminum) remaining in the concave portion after the completion of casting increases, which is not practical. If the opening length is not long enough, the aggregated TiB 2 particles will not settle sufficiently, and the cast plate will have streaks.
【００１０】図５は、冷間圧延機50の構成を示す説明図
である。冷間圧延機50は、コイル送出し機52とコイル巻
取り機54との間に設けられ、鋳造板36を挟んで設けられ
た一対のワークロール56、56と、一対のワークロール5
6、56に転接されたバックアップロール58とから構成さ
れる。コイル送出し機52からコイル巻取り機54まで搬送
される板36は、一対のワークロール56、56の回転によっ
て冷間圧延が行われる。尚、バックアップロールとワー
クロールの間に中間ロールを設けてもよいし、バックア
ップロールや中間ロールを複数本、設けてもよい。FIG. 5 is an explanatory view showing the structure of the cold rolling mill 50. The cold rolling mill 50 is provided between the coil feeder 52 and the coil winder 54, and has a pair of work rolls 56, 56 provided with the casting plate 36 interposed therebetween, and a pair of work rolls 5
And a backup roll 58 transferred to and from 56. The plate 36 conveyed from the coil feeder 52 to the coil winder 54 is subjected to cold rolling by rotation of a pair of work rolls 56,56. Note that an intermediate roll may be provided between the backup roll and the work roll, or a plurality of backup rolls and intermediate rolls may be provided.
【００１１】図６は、連続焼鈍装置60の構成を示す説明
図である。連続焼鈍装置60は、送り出し機62と巻取り機
64との間に設けられ、送出し機62から巻取り機64まで搬
送される冷間圧延済の板は、連続焼鈍装置60を通過する
際に熱処理が行われる。図７は、バッチ焼鈍装置70の構
成を示す説明図である。バッチ焼鈍装置70は、支持板72
とその図中上面に設けられた一対のストッパー74、74と
を備えている。図５の冷間圧延機で冷間圧延され、巻取
られたコイルは、支持板72に載置されて熱処理が行われ
る。FIG. 6 is an explanatory view showing the structure of the continuous annealing apparatus 60. The continuous annealing device 60 includes a feeder 62 and a winding machine.
The cold-rolled plate provided between the feeder 64 and the winding machine 64 is subjected to a heat treatment when passing through the continuous annealing device 60. FIG. 7 is an explanatory diagram showing the configuration of the batch annealing apparatus 70. The batch annealing device 70 includes a support plate 72
And a pair of stoppers 74 provided on the upper surface in the figure. The coil that has been cold rolled and wound by the cold rolling mill shown in FIG. 5 is placed on a support plate 72 and subjected to heat treatment.
【００１２】図８は、矯正装置80の構成を示す説明図で
ある。矯正装置80は、送出し機82と巻取り機84との間に
設けられ、複数の矯正ローラ86、86・・・ が板の搬送径路
に沿って設けられる。送出し機62から巻取り機64まで搬
送される板は、送出し機、巻取り機間で張力を与えられ
ながら複数の矯正ローラ86、86・・・ の回転によってその
巻き癖が矯正される。FIG. 8 is an explanatory view showing the structure of the correction device 80. The straightening device 80 is provided between the delivery device 82 and the winder 84, and a plurality of straightening rollers 86 are provided along the conveying path of the plate. The plate conveyed from the feeder 62 to the take-up machine 64 has its curl corrected by the rotation of a plurality of straightening rollers 86, 86... While being tensioned between the feeder and the take-up machine. .
【００１３】次に、上記の如く構成された連続鋳造圧延
装置の作用について説明する。図１の溶解保持炉12は、
アルミニウム合金のインゴットが溶解された溶湯22を保
持する。レベル計32は樋14内の液位を検出し、制御装置
34は該検出液位に基づいて溶解保持炉傾動機24を制御し
て保持炉12を電動モーター駆動によって傾勤して、溶解
保持炉12内の溶湯22を樋14に注入する。Next, the operation of the continuous casting and rolling apparatus configured as described above will be described. The melting and holding furnace 12 of FIG.
The molten metal 22 in which the aluminum alloy ingot is melted is held. The level meter 32 detects the liquid level in the gutter 14 and controls
34 controls the melting and holding furnace tilting machine 24 based on the detected liquid level to tilt the holding furnace 12 by driving an electric motor, and injects the molten metal 22 in the melting and holding furnace 12 into the gutter 14.
【００１４】樋14内に注入された溶湯22は図中右方向に
流れて、溶湯供給ノズル16から一対の回転ローラ18、18
間に吐出される。この時、溶湯22に含まれるTiB2の微細
な粒子は溶湯中に分散して、ノズル16を経て鋳造板に取
り込まれ、結晶微細化の作用を示すが、粗大な粒子は沈
降して底にたまりやすい。Alの比重2.7 に対して、TiB2
は、その比重が4.5 と大きいため、特に粗大な粒子は切
欠を有する凹部30に沈降してAlから分離除去されやす
い。加えて、切欠を有する凹部は、その入口付近で滞留
が生じにくいので、微細な粒子が滞留部にとどまり凝集
することが起こりにくい。従って、粗大なTiB2粒子は溶
湯供給ノズル16から一対の回転ローラ18、18間に吐出さ
れない。The molten metal 22 injected into the gutter 14 flows rightward in the figure, and flows from a molten metal supply nozzle 16 to a pair of rotating rollers 18, 18.
It is discharged in between. At this time, the fine particles of TiB 2 contained in the molten metal 22 are dispersed in the molten metal and taken into the casting plate via the nozzle 16 and exhibit the action of crystal refining, but the coarse particles settle and settle to the bottom. Easy to collect. With a specific gravity of Al of 2.7, TiB 2
Since its specific gravity is as large as 4.5, particularly coarse particles are likely to settle in the notches 30 and be separated and removed from Al. In addition, since the recess having the notch does not easily stay near the entrance, it is unlikely that the fine particles stay in the staying portion and aggregate. Therefore, coarse TiB 2 particles are not discharged from the molten metal supply nozzle 16 between the pair of rotating rollers 18.
【００１５】一対の回転ローラ18、18は、溶湯供給ノズ
ル16から吐出された溶湯をその回転によって鋳造圧延し
て鋳造板36を形成する。この時、筋発生の原因となる粗
大なTiB2が混入しないため、筋のない表面品質の高い鋳
造板36を得ることができる。回転する一対の回転ローラ
18、18は鋳造板36を挟持搬送して、コイラー20に巻き取
られる。また必要に応じて切断機38によって一定の長さ
に切断してもよい。A pair of rotating rollers 18 and 18 form a cast plate 36 by casting and rolling the molten metal discharged from the molten metal supply nozzle 16 by the rotation thereof. At this time, since coarse TiB 2 that causes streaks is not mixed, a cast plate 36 with no streaks and high surface quality can be obtained. A pair of rotating rollers that rotate
18, 18 hold and transport the cast plate 36 and are wound up by the coiler 20. If necessary, the sheet may be cut into a predetermined length by the cutting machine 38.
【００１６】次に、コイラー20に巻き取られた鋳造板36
に対して、図５に示す冷間圧延機50によって冷間圧延を
行い、図６に示す連続焼鈍装置60又は図７に示すバッチ
焼鈍装置70によって熱処理を行う。冷間圧延と熱処理
は、鋳造板36の組織の均一化と平坦化、及び強度コント
ロールのために行われ、必要に応じて何れか一方のみを
行ってもよい。冷間圧延と熱処理を両方行う場合には0.
5 〜３mm厚に鋳造圧延された鋳造板36を0.1 〜0.5mm 厚
に仕上げる。熱処理を行わない場合には、冷間圧延のみ
で0.1 〜0.5mm 厚に仕上げる。熱処理に連続焼鈍装置60
を使用する場合には400 〜 600°で１〜600 秒行い、バ
ッチ焼鈍装置70を使用する場合には300 〜600°で１〜1
2時間行う。Next, the casting plate 36 wound around the coiler 20
On the other hand, cold rolling is performed by a cold rolling mill 50 shown in FIG. 5 and heat treatment is performed by a continuous annealing apparatus 60 shown in FIG. 6 or a batch annealing apparatus 70 shown in FIG. The cold rolling and the heat treatment are performed for homogenizing and flattening the structure of the cast plate 36 and controlling the strength, and only one of them may be performed as necessary. 0 if both cold rolling and heat treatment are performed.
The cast plate 36 cast and rolled to a thickness of 5 to 3 mm is finished to a thickness of 0.1 to 0.5 mm. When heat treatment is not performed, the thickness is reduced to 0.1 to 0.5 mm only by cold rolling. Continuous annealing equipment 60 for heat treatment
1 to 600 seconds at 400 to 600 °, and 1 to 300 to 600 ° when using the batch annealing device 70.
Perform for 2 hours.
【００１７】次いで、図８に示す矯正装置56で圧延板の
平面性を矯正する。その後、鋳造板36の表面を機械的、
或いは電気的、或いは化学的、或いは電気化学的に粗面
化して、平版印刷版用支持体に仕上げる。この平版印刷
版用支持体に感光性塗膜を設け、画像露光し、現像して
製版し、感光性平版印刷版が完成する。この感光性平版
印刷版は、鋳造板36の表面品質の向上に伴い、高品質に
製造することができる。Next, the flatness of the rolled plate is corrected by the correction device 56 shown in FIG. After that, the surface of the cast plate 36 is mechanically
Alternatively, the surface is roughened electrically, chemically, or electrochemically to finish a lithographic printing plate support. A photosensitive coating film is provided on this lithographic printing plate support, image-exposed, developed and plate-made to complete a photosensitive lithographic printing plate. This photosensitive lithographic printing plate can be manufactured with high quality as the surface quality of the cast plate 36 is improved.
【００１８】[0018]
【実施例】以下、本発明を実施例によって具体的に説明
する。図１に示す連続鋳造圧延装置10を用いて、次のよ
うに鋳造板36を連続鋳造圧延した。まず、溶解保持炉12
でFe:0.30 重量% （以下同様) 、Si:0.05%、Cu:0.01%、
残りAlと不可避不純物となるように溶湯22を調整し、77
5 ℃に維持した。溶解保持炉12を傾けて、樋14に溶湯22
を注ぎ、溶湯供給ノズル16から一対の回転ローラ18、18
間に吐出させ、回転ローラ18、18間で凝固・ 冷却しなが
ら厚さ7.0mm の鋳造板B6を連続鋳造圧延した。この際、
Al-Ti(5%)-B(1%) の合金ワイヤ23を結晶微細化剤として
樋14の溶湯22に供給し、溶湯22中のTi濃度が0.01% にな
るように供給速度を設定して溶解させた。図９は、凹部
30の形状を種々変化させた際の、各鋳造処理量における
鋳造板36の表面品質を比較した実験結果を示す図であ
る。実施例１では、流路低面部の流れ方向の前の上端部
に切欠を有する凹部を形成した樋を使用して連続鋳造を
行った。実施例２では、流れ方向の前及び後上端部に切
欠を有する凹部を使用して連続鋳造を行った。比較例１
として、切欠部のない凹部を形成した樋を使用して鋳造
を行った例を示した。比較例２として凹部が形成されて
いない、流路底面部が平坦な樋を使用して鋳造を行った
例を示した。実施例及び比較例の装置の概略寸法は以下
の通りである。The present invention will be specifically described below with reference to examples. Using the continuous casting and rolling apparatus 10 shown in FIG. 1, the cast plate 36 was continuously cast and rolled as follows. First, the melting and holding furnace 12
Fe: 0.30% by weight (the same applies hereinafter), Si: 0.05%, Cu: 0.01%,
Adjust the molten metal 22 so that it becomes the remaining Al and inevitable impurities.
Maintained at 5 ° C. Tilt the melting and holding furnace 12 so that the molten metal 22
And a pair of rotating rollers 18, 18 from the molten metal supply nozzle 16.
The casting plate B6 having a thickness of 7.0 mm was continuously cast and rolled while being solidified and cooled between the rotating rollers 18. On this occasion,
An Al-Ti (5%)-B (1%) alloy wire 23 is supplied to the melt 22 of the gutter 14 as a crystal refining agent, and the supply speed is set so that the Ti concentration in the melt 22 becomes 0.01%. To dissolve. FIG.
FIG. 14 is a diagram showing experimental results comparing the surface quality of a cast plate 36 at various casting treatment amounts when variously changing the shape of No. 30. In Example 1, continuous casting was performed using a gutter having a recess having a notch at the upper end in front of the flow direction of the lower surface of the flow channel. In Example 2, continuous casting was performed using a concave portion having a notch at the front and rear upper ends in the flow direction. Comparative Example 1
As an example, an example was shown in which casting was performed using a gutter having a concave portion without a notch. As Comparative Example 2, an example was shown in which casting was performed using a gutter having no flat surface and a flat bottom portion having no concave portion. The schematic dimensions of the devices of the examples and comparative examples are as follows.
【００１９】[0019]
【表１】 流路の 凹部の 凹部底部 前切欠部 後切欠部 深さ 深さ 長さ 高さ×幅 高さ×幅 実施例１ 30mm 60mm 30mm 20×10mm − 実施例２ 30mm 60mm 30mm 20×10mm 20×10mm 比較例１ 30mm 60mm 30mm − − 比較例２ 30mm − − − − [Table 1] Bottom of concave part of flow channel concave part Front notch part Rear notch depth Depth Length Height x width Height x width Example 1 30mm 60mm 30mm 20 × 10mm-Example 2 30mm 60mm 30mm 20 × 10mm 20 × 10mm Comparative Example 1 30mm 60mm 30mm − − Comparative Example 2 30mm − − − −
【００２０】鋳造中は樋14の溶湯面レベルをレベル計32
で測定し、制御装置34を介して溶解保持炉12の溶解保持
炉傾動機24を制御し、溶湯の供給量を一定にした。この
ように作製したサンプルをコイラー20で巻き取り、切断
機38で適宜カットしてサンプルウェブとした。次いで、
各サンプルウエブを図５に示す冷間圧延機50で1.5mm厚
まで冷間圧延し、図７に示すバッチ式焼鈍装置70によっ
て480 ℃で10時間焼鈍し熱処理を行なった。そして、再
度各鋳造板36を図５に示す冷間圧延機50で冷間圧延して
0.24mm厚に仕上げた。During casting, the level of the molten metal of the gutter 14 is measured by a level meter 32.
Then, the melting and holding furnace tilting machine 24 of the melting and holding furnace 12 was controlled via the control device 34 to make the supply amount of the molten metal constant. The sample thus produced was wound up by the coiler 20 and cut appropriately by a cutting machine 38 to obtain a sample web. Then
Each sample web was cold-rolled to a thickness of 1.5 mm by a cold rolling mill 50 shown in FIG. 5, and annealed at 480 ° C. for 10 hours by a batch annealing apparatus 70 shown in FIG. Then, each cast plate 36 is again cold-rolled by the cold rolling mill 50 shown in FIG.
Finished 0.24mm thick.
【００２１】次に、Ti起因の筋のレベルを確認するた
め、0.24mm厚に仕上げた各板をアルミン酸ソーダ(Al3+
10%:NaOH30%)液を用いて60℃で30秒間のアルカリエッチ
ング処理を行った後、硫酸液でデスマットを行い、硝酸
液中でて電気化学的に粗面化した。その状態で各板に筋
が発生しているか否かを評価した。この結果、実施例１
では処理量400kg までは筋が認められないが（○）、10
00kg処理すると、やや筋が認められた（△）。また、流
れ方向の後の上端部にも切欠部を有する凹部が形成され
た樋を使用した実施例２では、いずれの処理量において
も筋は認められなかった。切欠部を有さない凹部を有す
る樋を使用した比較例１では、処理量100kg では筋が認
められなかったが、これよりも処理量が多くなると筋が
明らかに認められた（×) 。また、凹部を有さない樋を
使用した比較例２ではいずれの処理量においても筋が明
らかに認められた。Next, in order to confirm the level of streaks caused by Ti, each plate finished to 0.24 mm thickness was treated with sodium aluminate (Al 3+
After performing alkali etching treatment at 60 ° C. for 30 seconds using a (10%: NaOH 30%) solution, desmutting was performed with a sulfuric acid solution, and the surface was electrochemically roughened in a nitric acid solution. In that state, it was evaluated whether or not streaks were formed on each plate. As a result, Example 1
No streak is observed up to a processing amount of 400 kg (○), but 10
After the treatment with 00 kg, a slight streak was observed (△). Further, in Example 2 using a gutter having a concave portion having a notch at the upper end after the flow direction, no streak was observed at any processing amount. In Comparative Example 1 using a gutter having a concave portion without a notch, no streak was observed at a processing amount of 100 kg, but a streak was clearly observed when the processing amount was larger than this (x). Further, in Comparative Example 2 using a gutter having no concave portion, a streak was clearly observed at any treatment amount.
【００２２】比較例１及び２の鋳造板36に対してEPMA
（電子プローブマイクロアナライザ、日本電子製JXA -8
800M) で面分析を行うと、発生した筋にはTiB2が偏折し
ていることが確認された。更に、前述の鋳造作業が終了
した後、樋14及び凹部30から溶湯22を排出すると、凹部
30に溶湯22の残骸と見られる不純物が存在し、その不純
物を分析するとTiB2が高濃度で検出され、粗大なTiB2粒
子が凹部に沈降していることを確認した。比較例１では
凹部の流れ方向の前の壁面が垂直であるため、この壁面
に溶湯がぶつかり、流れに淀みが発生、又はうず流が発
生するために、粗大なTiB2（不純物) を十分に沈降でき
なかったことと、淀みに滞留したTiB2が凝集し、粗大な
TiB2粒子を形成したために、筋が発生したと考えられ
る。この結果から、実施例１及び２の各凹部30の形状
は、比較例１の形状の凹部30よりもTiB2粒子が沈降し易
いことがわかる。EPMA was applied to the cast plates 36 of Comparative Examples 1 and 2.
(Electron probe microanalyzer, JEOL JXA-8
A surface analysis at 800M) confirmed that TiB 2 was deflected to the generated streaks. Further, after the casting operation described above is completed, when the molten metal 22 is discharged from the gutter 14 and the concave portion 30, the concave portion is formed.
An impurity, which is considered to be a remnant of the molten metal 22, was present in 30. When the impurity was analyzed, TiB 2 was detected at a high concentration, and it was confirmed that coarse TiB 2 particles had settled in the concave portion. In Comparative Example 1, since the wall surface in front of the flow direction of the concave portion is vertical, the molten metal collides with this wall surface, and stagnation occurs in the flow or eddy flow occurs, so that coarse TiB 2 (impurity) is sufficiently removed. The sediment could not be settled, and the stagnant TiB 2 aggregated and became coarse.
It is considered that streaks occurred due to the formation of TiB 2 particles. From this result, it can be seen that the shape of each recess 30 of Examples 1 and 2 is more likely to cause the TiB 2 particles to settle than the shape of the recess 30 of Comparative Example 1.
【００２３】[0023]
【発明の効果】本発明は流路の底面に流れ方向の前の上
端部、さらに好ましくは後の上端部にも切欠を有する凹
部を有するアルミニウム板形成溶連続鋳造圧延装置に関
し、この装置を使用してアルミニウム板を形成すること
により、溶湯に含まれる粗大なTiB2粒子を鋳造板に混入
しないようにできるので、筋のないアルミニウム板を製
造することができる。The present invention relates to a continuous casting and rolling apparatus for forming an aluminum plate having a concave portion having a notch at the front upper end in the flow direction, more preferably at the rear upper end, at the bottom of the flow path. By forming the aluminum plate in this way, coarse TiB 2 particles contained in the molten metal can be prevented from being mixed into the cast plate, and thus an aluminum plate without streaks can be manufactured.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本実施の形態の連続鋳造圧延装置の全体構成を
示す説明図である。FIG. 1 is an explanatory diagram showing an overall configuration of a continuous casting and rolling apparatus according to an embodiment.
【図２】図１に示された凹部を形成する樋の一部を示す
拡大斜視図である。FIG. 2 is an enlarged perspective view showing a part of a gutter forming a recess shown in FIG.
【図３】図２に示された樋の一部の正面図である。FIG. 3 is a front view of a part of the gutter shown in FIG. 2;
【図４】図３の４−４線に沿う断面図である。FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;
【図５】冷間圧延機の説明図である。FIG. 5 is an explanatory view of a cold rolling mill.
【図６】連続焼鈍装置の説明図である。FIG. 6 is an explanatory view of a continuous annealing apparatus.
【図７】バッチ焼鈍装置の説明図である。FIG. 7 is an explanatory view of a batch annealing apparatus.
【図８】矯正装置の説明図である。FIG. 8 is an explanatory diagram of a straightening device.
【図９】凹部の形状を変えた際の鋳造板の表面品質を比
較した実験結果を示す図である。FIG. 9 is a view showing an experimental result of comparing the surface quality of a cast plate when the shape of the concave portion is changed.
１０…連続鋳造圧延装置 １２…溶解保持炉 １４…樋 １６…溶湯供給ノズル １８…回転ローラ ２２…溶湯 ３０…凹部 ３６…鋳造板 DESCRIPTION OF SYMBOLS 10 ... Continuous casting-rolling apparatus 12 ... Melt holding furnace 14 ... Gutter 16 ... Molten supply nozzle 18 ... Rotary roller 22 ... Molten 30 ... Recess 36 ... Cast plate
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２２Ｄ 21/04 Ｂ２２Ｄ 21/04 Ａ 35/00 35/00 Ｆ Ｂ４１Ｎ 1/08 Ｂ４１Ｎ 1/08 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI B22D 21/04 B22D 21/04 A 35/00 35/00 F B41N 1/08 B41N 1/08
Claims (4)
向に対して前の上端部に切欠を有する凹部を有するアル
ミニウム板形成用連続鋳造圧延装置を用いることを特徴
とする、アルミニウム板の製造方法。1. A method for manufacturing an aluminum sheet, comprising using a continuous casting and rolling device for forming an aluminum sheet having a recess having a notch at the upper end in front of the flow direction on the bottom surface of the flow path of the molten aluminum. .
端部にも切欠を有することを特徴とする、請求項１に記
載のアルミニウム板の製造方法。2. The method of manufacturing an aluminum plate according to claim 1, wherein the recess further has a notch at an upper end portion rearward in the flow direction.
向に対して前の上端部に切欠を有する凹部を有すること
を特徴とする、アルミニウム板形成用連続鋳造圧延装
置。3. A continuous casting and rolling device for forming an aluminum plate, comprising a recess having a notch at an upper end in front of a flow direction on a bottom surface of a flow path of the molten aluminum.
端部にも切欠を有することを特徴とする、請求項３に記
載のアルミニウム板形成用連続鋳造圧延装置。4. The continuous casting and rolling device for forming an aluminum plate according to claim 3, wherein the concave portion further has a notch at an upper end rearward in the flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5668598A JPH11254093A (en) | 1998-03-09 | 1998-03-09 | Production of aluminum plate using continuous casting and rolling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5668598A JPH11254093A (en) | 1998-03-09 | 1998-03-09 | Production of aluminum plate using continuous casting and rolling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11254093A true JPH11254093A (en) | 1999-09-21 |
Family
ID=13034305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5668598A Pending JPH11254093A (en) | 1998-03-09 | 1998-03-09 | Production of aluminum plate using continuous casting and rolling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11254093A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1018817C2 (en) * | 2001-08-24 | 2003-02-25 | Corus Technology B V | Method for processing a continuously cast metal slab or belt, and plate or belt thus produced. |
| JP2009006386A (en) * | 2007-06-29 | 2009-01-15 | Fujifilm Corp | Method of and apparatus for manufacturing aluminum alloy strip for lithographic printing plate |
| US7546756B2 (en) | 2001-08-24 | 2009-06-16 | Corus Technology Bv | Method for processing a metal slab or billet, and product produced using said method |
| US7575041B2 (en) | 2003-03-26 | 2009-08-18 | Showda Denko K.K. | Horizontally continuously cast rod of aluminum alloy and method and equipment for producing the rod |
| US7988786B2 (en) | 2001-08-21 | 2011-08-02 | Kabushiki Kaisha Toshiba | Carbon film coated member |
| CN103878348A (en) * | 2014-03-24 | 2014-06-25 | 中国重型机械研究院股份公司 | Magnesium alloy sheet belt continuous production device and technology |
-
1998
- 1998-03-09 JP JP5668598A patent/JPH11254093A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7988786B2 (en) | 2001-08-21 | 2011-08-02 | Kabushiki Kaisha Toshiba | Carbon film coated member |
| NL1018817C2 (en) * | 2001-08-24 | 2003-02-25 | Corus Technology B V | Method for processing a continuously cast metal slab or belt, and plate or belt thus produced. |
| WO2003018223A1 (en) * | 2001-08-24 | 2003-03-06 | Corus Technology Bv | Method for processing a continuously cast metal slab or strip, and plate or strip produced in this way |
| US7341096B2 (en) | 2001-08-24 | 2008-03-11 | Corus Technology Bv | Method for processing a continuously cast metal slab or strip, and plate or strip produced in this way |
| US7546756B2 (en) | 2001-08-24 | 2009-06-16 | Corus Technology Bv | Method for processing a metal slab or billet, and product produced using said method |
| US7575041B2 (en) | 2003-03-26 | 2009-08-18 | Showda Denko K.K. | Horizontally continuously cast rod of aluminum alloy and method and equipment for producing the rod |
| JP2009006386A (en) * | 2007-06-29 | 2009-01-15 | Fujifilm Corp | Method of and apparatus for manufacturing aluminum alloy strip for lithographic printing plate |
| US8048364B2 (en) | 2007-06-29 | 2011-11-01 | Fujifilm Corporation | Method and apparatus for manufacturing aluminum alloy strip for lithographic printing plates |
| US8366842B2 (en) | 2007-06-29 | 2013-02-05 | Fujifilm Corporation | Method and apparatus for manufacturing aluminum alloy strip for lithographic printing plates |
| CN103878348A (en) * | 2014-03-24 | 2014-06-25 | 中国重型机械研究院股份公司 | Magnesium alloy sheet belt continuous production device and technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2008739B1 (en) | Method for manufactuirng aluminum alloy strip for lithographic printing plates | |
| JP4495224B2 (en) | Slabs with excellent solidification structure | |
| JP4218383B2 (en) | Continuous casting method, continuous casting apparatus and continuous cast slab | |
| EP0581321B1 (en) | Method of producing planographic printing plate support | |
| JPH11254093A (en) | Production of aluminum plate using continuous casting and rolling apparatus | |
| JPH07305133A (en) | Supporting body for planographic printing plate and its production | |
| JP2008043958A (en) | Aluminum continuous casting and rolling apparatus, and manufacturing method of aluminum alloy plate for lithographic form plate supporting body | |
| JP5199042B2 (en) | Aluminum alloy plate manufacturing equipment for lithographic printing plates | |
| JP3994426B2 (en) | Apparatus and method for continuously casting and rolling aluminum | |
| EP0615801B1 (en) | Method of producing support for planographic printing plate | |
| JPH0740017A (en) | Production of supporting body for planographic printing plate | |
| JPH1147892A (en) | Continuous casting and rolling apparatus | |
| JP3587351B2 (en) | Method for producing aluminum alloy support for lithographic printing plate | |
| US20060213589A1 (en) | Method of manufacturing a support for a lithographic printing plate | |
| EP0603476B1 (en) | Support for a planographic printing plate and method for producing same | |
| EP0928652B1 (en) | Method for producing planographic printing plate support | |
| JP3184636B2 (en) | Method for producing a lithographic printing plate support | |
| EP1520728A2 (en) | Method of manufacturing a support for a lithographic printing plate | |
| JP3671872B2 (en) | Continuous casting method of steel | |
| JP3962849B2 (en) | Planographic printing plate support manufacturing equipment | |
| JP4132653B2 (en) | Steel | |
| JPH0873974A (en) | Aluminum alloy substrate for lithographic plate | |
| JP3685360B2 (en) | Method for producing aluminum alloy lithographic printing plate support | |
| US20240066576A1 (en) | Method of manufacturing aluminum plate | |
| JP2000052000A (en) | Method for continuously casting and rolling aluminum alloy thin sheet |