JPH06447Y2 - Hot dip plating equipment - Google Patents
Hot dip plating equipmentInfo
- Publication number
- JPH06447Y2 JPH06447Y2 JP9930787U JP9930787U JPH06447Y2 JP H06447 Y2 JPH06447 Y2 JP H06447Y2 JP 9930787 U JP9930787 U JP 9930787U JP 9930787 U JP9930787 U JP 9930787U JP H06447 Y2 JPH06447 Y2 JP H06447Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- hot dip
- moving magnetic
- steel strip
- hot
- 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
Landscapes
- Coating With Molten Metal (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、連続メッキ法において走行する鋼ストリップ
のメッキ目付量を制御する溶融メッキ装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hot dipping apparatus for controlling a coating weight of a steel strip running in a continuous plating method.
（従来の技術） 一般に、鋼ストリップの連続溶融メッキ装置において、
鋼ストリップのメッキ目付量の制御は、主としてガスワ
イピング（気体噴射ノズル払拭）法で行なわれている。
この方法は、溶融メッキ金属浴中を連続的に通過して浮
上する鋼ストリップに付着した溶融状態のメッキ金属に
空気、窒素、ガス、水蒸気などの高温、高圧の気体を吹
き付けて、余剰のメッキを払拭し、所定のメッキ目付量
に制御するものである。しかし、この方法でメッキ金属
の薄目付化あるいは鋼ストリップの高速メッキ化を行な
わんとすると、かなりの高圧ガスを吹き付けるため、溶
融メッキ金属のスプラシュを増して得られたメッキ鋼板
の外観性を著しく悪化する問題があった。(Prior Art) Generally, in a continuous hot-dip galvanizing apparatus for steel strip,
The control of the coating weight of the steel strip is mainly performed by a gas wiping (gas wiping nozzle wiping) method.
This method consists in spraying surplus plating by blowing high-temperature, high-pressure gas such as air, nitrogen, gas, or steam onto the molten plating metal that has adhered to the steel strip that floats by continuously passing through the molten plating metal bath. Is wiped off to control the coating weight to a predetermined value. However, if thinning of plated metal or high-speed plating of steel strip is attempted by this method, a considerably high pressure gas is blown, so the appearance of the plated steel sheet obtained by increasing the splash of the hot-dip metal is remarkably increased. There was a problem that got worse.
（考案が解決しようとする問題点） このような問題を解決する方法の装置として、例えば特
公昭58-23464号公報のように、溶融メッキ金属浴から浮
上した直後の鋼ストリップおよびその近傍の浴表面に移
動磁界を付加して浮上する溶融メッキ金属のドラッグア
ウトを防止する向きに電磁力を誘発し、さらに該電磁力
が作用する範囲外の上方位置に加熱気体を噴射するノズ
ルを設けた溶融メッキ装置である。このような装置は、
電磁力を鋼ストリップ板厚方向に作用させるため、電磁
力のワイピング能力が小さく、極薄目付溶融メッキ鋼板
が得られない問題があった。このような問題を解消した
ものとして移動磁界発生装置の電磁力作用範囲内に気体
噴射ノズルを介装設定する薄目付溶融メッキ装置が特開
昭62-103353号公報で紹介されている。この装置は、前
者の装置に比較して、鋼ストリップに付着した溶融メッ
キ金属の膜厚を一層薄くして薄目付鋼板を容易に製造す
ることが出来る。しかしながら、ラインスピードの高速
化や超薄目付鋼板を製造する場合、気体ワイピング圧力
を高くする必要がある。そのため気体の高圧力に耐えら
れるようにワイピングノズルは、厚い肉厚の材料を使用
して大型に組立てられ、第２図Ａで示すように、溶融メ
ッキ金属浴のイクジットロールの間を通過して浮上
する鋼ストリップに付着した溶融メッキ金属に作用
するコイルを配列した移動磁界発生装置の電磁力が
第２図Ｂで示すように気体ワイピングの相当位置で弱
められ、所要目的の超薄目付鋼板が得られない場合があ
った。(Problems to be Solved by the Invention) As an apparatus for a method for solving such a problem, for example, as disclosed in Japanese Patent Publication No. 58-23464, a steel strip immediately after being floated from a hot dip metal bath and a bath in the vicinity thereof. Melting with a nozzle that applies a moving magnetic field to the surface and induces an electromagnetic force in a direction that prevents dragging out of the molten plating metal that floats, and further injects heated gas above the range where the electromagnetic force acts It is a plating device. Such a device
Since the electromagnetic force is applied in the thickness direction of the steel strip, there is a problem that the wiping ability of the electromagnetic force is small and an ultra-thin hot-dip galvanized steel sheet cannot be obtained. As a solution to such a problem, Japanese Unexamined Patent Publication (Kokai) No. 62-103353 discloses a dip coating machine that sets a gas injection nozzle in the electromagnetic force acting range of a moving magnetic field generator. Compared with the former device, this device can further reduce the film thickness of the hot-dip metal adhered to the steel strip to easily manufacture a steel sheet having a light weight. However, it is necessary to increase the gas wiping pressure when increasing the line speed or manufacturing an ultra-thin steel sheet. Therefore, the wiping nozzle is constructed in a large size using a thick wall material so as to withstand the high pressure of gas, and is passed between the exit rolls of the hot dip metal bath as shown in FIG. 2A. As shown in FIG. 2B, the electromagnetic force of the moving magnetic field generator in which the coils acting on the hot-dip galvanized steel adhered to the floating steel strip are arranged is weakened at the corresponding position of the gas wiping, and the ultra-thin steel plate with the desired purpose is obtained. There were cases where it was not possible to obtain it.
（問題点の解決手段） 本考案は、例えば第２図のように移動磁界発生装置と気
体ワイピングノズルを使用する場合でも、該ノズル相当
位置で電磁力が弱められないメッキ目付量制御の出来る
溶融メッキ装置を提供するものである。その要旨は、溶
融メッキ金属浴槽のストリップ出側近傍に溶融メッキ金
属浴中を通過して浮上する鋼ストリップに付着した溶融
メッキ金属を浴面側に押し下げる移動磁界を発生する移
動磁界発生装置と、さらに該移動磁界発生装置と鋼スト
リップとの間に余剰の溶融メッキ金属を払拭する気体噴
射ノズルを設けた溶融メッキ装置である。(Means for Solving Problems) According to the present invention, even when a moving magnetic field generator and a gas wiping nozzle are used as shown in FIG. 2, for example, the fusion of the coating weight can be controlled so that the electromagnetic force is not weakened at the position corresponding to the nozzle. A plating device is provided. The gist is a moving magnetic field generator that generates a moving magnetic field that pushes the molten plated metal adhering to the steel strip that floats through the molten plated metal bath near the strip exit side of the molten plated metal bath to the bath surface side, Further, the hot-dip galvanizing apparatus is provided with a gas jet nozzle for wiping off the excess hot-dip galvanized metal between the moving magnetic field generator and the steel strip.
以下本考案の装置について詳細に説明する。The device of the present invention will be described in detail below.
第１図Ａは溶融メッキ装置の鋼ストリップ出側を示す。
Ａ図においては溶融メッキ金属浴で、亜鉛、錫、アル
ミニウムやその他の金属あるいはこれらの合金などメッ
キ金属が溶融されている。はイクジットロールで、溶
融メッキ浴中に配置され、走行する鋼ストリップを挟
んで浮上させる。はその際鋼ストリップに付着した
溶融メッキ金属である。は磁界発生用コイルで、複数
個を鋼ストリップの走行方向に並べて移動磁界発生装
置を構成する。は気体噴射ノズルで、鋼ストリップ
に付着した溶融メッキ金属と移動磁界発生装置と
の間に設けられ、空気、窒素、水蒸気などの高圧気体を
噴出して、余剰の溶融メッキを払拭する。FIG. 1A shows the steel strip exit side of the hot dipping apparatus.
In FIG. A, a plating metal such as zinc, tin, aluminum, other metals or alloys thereof is melted in a hot-dip metal bath. Is an exit roll, which is placed in a hot dip bath and floats across a running steel strip. Is the hot-dip metal that has adhered to the steel strip. Is a magnetic field generating coil, and a plurality of magnetic field generating coils are arranged in the running direction of the steel strip to form a moving magnetic field generating device. Is a gas injection nozzle, which is provided between the molten plating metal adhered to the steel strip and the moving magnetic field generator, and ejects a high-pressure gas such as air, nitrogen, or steam to wipe off excess molten plating.
上記のように構成した本考案は、磁界発生用コイルに
多相交流を通電し移動磁界発生装置から発生する移動
磁界を、溶融メッキ金属浴を通過して浮上する鋼スト
リップに付着した余剰の溶融メッキ金属に付加し、
さらに磁界と電流の相互作用で溶融メッキ金属浴側に
誘起される電磁力で溶融メッキ金属の目付量を調整す
る。さらにまた電磁力が作用する範囲で気体を吹付けて
所要の目付量の溶融メッキ金属に払拭しようとするもの
である。またこのような本考案は、第１図Ｂで示すよう
に電磁力の局部低下を起すこともなく、所要目付量の溶
融メッキ鋼板を安定して製造する。The present invention configured as described above is configured to apply a multi-phase alternating current to a magnetic field generating coil to cause a moving magnetic field generated by a moving magnetic field generator to generate excess melting adhered to a steel strip that floats through a molten plating metal bath. Add to plating metal,
Furthermore, the basis weight of the molten plated metal is adjusted by the electromagnetic force induced on the molten plated metal bath side by the interaction between the magnetic field and the current. Furthermore, it is intended to blow a gas in a range where an electromagnetic force acts to wipe the molten plated metal of a required basis weight. In addition, the present invention stably manufactures a hot-dip galvanized steel sheet having a required basis weight without causing a local decrease in electromagnetic force as shown in FIG. 1B.
気体噴射ノズル位置で溶融金属に作用する電磁力が大き
くなる様に、気体噴射ノズルを移動磁界付加装置と90m/
minで走行する鋼ストリップとの間に設置して溶融亜鉛
連続メッキを行なった。Move the gas injection nozzle to 90 m / m with the moving magnetic field adding device so that the electromagnetic force acting on the molten metal at the gas injection nozzle position becomes large.
It was installed between steel strips running at min and continuous galvanizing was performed.
移動磁界発生装置の高さは溶融亜鉛メッキ浴面から200m
m、幅はストリップより広くストリップから80mm離して
磁束密度はＢ＝0.15wb/m2で、周波数ｆ＝1,500Hzの移動
磁界を発生させた。気体噴射ノズルは、鋼ストリップか
ら20mm離し、かつ移動磁界発生装置の下端から120mmの
位置に設置し、1.5Kg/cm2の高圧ガスを噴射させた。し
かも移動磁界によりノズル内に誘導電流が流れないよう
にするためセラミックスとした。その結果第２図で示す
ような溶融メッキ装置では、48g/m2・片面、本考案の装
置では36g/m2・片面となった。The height of the moving magnetic field generator is 200 m from the hot dip galvanizing bath surface
m, the width was wider than the strip and 80 mm away from the strip, the magnetic flux density was B = 0.15 wb / m 2 , and a moving magnetic field with a frequency f = 1,500 Hz was generated. The gas injection nozzle was installed at a distance of 20 mm from the steel strip and at a position 120 mm from the lower end of the moving magnetic field generator to inject a high pressure gas of 1.5 kg / cm 2 . Moreover, ceramics are used to prevent an induced current from flowing in the nozzle due to the moving magnetic field. As a result, 48 g / m 2 · one side was obtained with the hot dipping apparatus as shown in FIG. 2, and 36 g / m 2 · one side was obtained with the apparatus of the present invention.
（考案の効果） 本考案は、電磁力の局部低下を起すこともなく、所要目
付量の溶融メッキ鋼板を安定して製造することができ
る。(Effects of the Invention) The present invention can stably manufacture a hot-dip galvanized steel sheet having a required basis weight without causing a local decrease in electromagnetic force.
第１図Ａ，Ｂは本考案の一実施例と電磁力分布図、第２
図Ａ，Ｂは従来の溶融メッキ装置とその電磁力分布図を
示す。1A and 1B show an embodiment of the present invention and an electromagnetic force distribution diagram, and FIG.
FIGS. A and B show a conventional hot dipping apparatus and its electromagnetic force distribution chart.
Claims (1)
に、溶融メッキ金属浴中を通過して浮上する鋼ストリッ
プに付着した溶融メッキ金属を浴面側に押し下げる移動
磁界を発生する移動磁界発生装置と、さらに該移動磁界
発生装置と鋼ストリップとの間に余剰の溶融メッキ金属
を払拭する気体噴射ノズルを設けたことを特徴とする溶
融メッキ装置。1. A moving magnetic field generator for generating a moving magnetic field near a strip exit side of a hot dip metal bath, which pushes down hot dip the hot dip metal adhered to a steel strip passing through a hot dip metal bath to the bath surface side. And a gas jet nozzle for wiping off excess molten plated metal between the moving magnetic field generator and the steel strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9930787U JPH06447Y2 (en) | 1987-06-30 | 1987-06-30 | Hot dip plating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9930787U JPH06447Y2 (en) | 1987-06-30 | 1987-06-30 | Hot dip plating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS647261U JPS647261U (en) | 1989-01-17 |
| JPH06447Y2 true JPH06447Y2 (en) | 1994-01-05 |
Family
ID=31326345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9930787U Expired - Lifetime JPH06447Y2 (en) | 1987-06-30 | 1987-06-30 | Hot dip plating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06447Y2 (en) |
-
1987
- 1987-06-30 JP JP9930787U patent/JPH06447Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS647261U (en) | 1989-01-17 |
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