JP2005171336A - Hot dip metal plating method and apparatus - Google Patents

Hot dip metal plating method and apparatus Download PDF

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JP2005171336A
JP2005171336A JP2003414229A JP2003414229A JP2005171336A JP 2005171336 A JP2005171336 A JP 2005171336A JP 2003414229 A JP2003414229 A JP 2003414229A JP 2003414229 A JP2003414229 A JP 2003414229A JP 2005171336 A JP2005171336 A JP 2005171336A
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molten metal
plating
strip
applying means
pressure
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Hironori Fujioka
宏規 藤岡
Takanori Nagai
孝典 永井
Masashi Yoshikawa
雅司 吉川
Tatsuya Hirano
竜也 平野
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Primetals Technologies Holdings Ltd
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Mitsubishi Hitachi Metals Machinery Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot dip metal plating method and apparatus which allows to eliminate the increase of film thickness and defects in surface quality, e.g., caused by the sticking of splashes to a plating face, and can be operated at a plating line rate of ≤300 m per minute, with high production capacity. <P>SOLUTION: In the continuous plating equipment where a strip 1 is continuously fed to a hot dip metal pot 2 and is passed therethrough to plate the surface of the strip with hot dip metal, a blade wiper 6 confronted with both the surfaces of the strip and a pressure applying means 7 composed of a static pressure pad mechanism which is provided at the downstream side of the plating line in the blade wiper and increases the pressure of the outlet side part in the blade wiper, are provided for controlling the thickness of a plating metal film 10 stuck to the strip 1 taken out from the hot dip metal pot 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、製鉄プロセスライン、特に、亜鉛等の溶融金属めっきラインにおける溶融金属めっき方法及び設備に関する。   The present invention relates to a molten metal plating method and equipment in an iron manufacturing process line, particularly a molten metal plating line for zinc or the like.

この種溶融金属めっきラインにおいては、一般に、連続的に焼鈍等の予備処理をして高温に保持したストリップ（鋼板）を、溶融めっき浴（溶融金属ポット）中のシンクロールに通板して上昇させ、その上昇過程でめっき付着量（溶融金属厚さ）を制御した後、所定の冷却パターンで常温まで冷却する方法が行われている。   In this type of molten metal plating line, the strip (steel plate), which has been kept at a high temperature by continuous pretreatment such as annealing, is generally passed through the sink roll in the molten plating bath (molten metal pot). In the rising process, the plating adhesion amount (molten metal thickness) is controlled and then cooled to room temperature with a predetermined cooling pattern.

例えば、図５に示すように、ストリップ１００を一旦溶融めっき浴１０１中に引き入れた後、溶融めっき浴１０１中に配置されたシンクロール１０２で方向転換させて浴中サポートロール１０３を経由して垂直に引き上げ、ストリップ１００の表面に付着した溶融亜鉛の余剰分を溶融めっき浴１０１上に対向して設置された一対のワイピングノズル１０４から吹き付けられるガスによって所要のめっき付着量に制御するようにしている（特許文献１参照）。尚、図５中１０５は距離計で、この距離計１０５の測定値により解析装置１０６でストリップ１００の振動や形状を求め、これに基づいてプロセスコンピュータ１０７がストリップ１００とワイピングノズル１０４との距離を両者間の接触を回避できる範囲の限界まで近づけるよう制御している。   For example, as shown in FIG. 5, after the strip 100 is once drawn into the hot dipping bath 101, the direction is changed by the sink roll 102 disposed in the hot dipping bath 101, and the vertical direction passes through the support roll 103 in the bath. The excess of the molten zinc adhering to the surface of the strip 100 is controlled to a required plating adhesion amount by a gas blown from a pair of wiping nozzles 104 disposed opposite to the hot dipping bath 101. (See Patent Document 1). In FIG. 5, reference numeral 105 denotes a distance meter. Based on the measured value of the distance meter 105, the analysis device 106 obtains the vibration and shape of the strip 100. Based on this, the process computer 107 determines the distance between the strip 100 and the wiping nozzle 104. Control is performed so as to approach the limit of the range in which contact between the two can be avoided.

また、図６に示すように、ストリップ１００は、前処理炉で表面清浄等の処理を施され、溶融めっき浴１０１へ導きシンクロール１０２を介して上部へ引き上げられたところで、第１静圧パッド１０８と第２静圧パッド１０９によりその走行ラインを円弧状に曲げられ、かつストリップ１００に付着した余剰の溶融亜鉛は、各々の静圧パッドのストリップ入側に設けられた付着量制御用気体噴射ノズル１０８ａ，１０９ａからのガスにより掻き取られ所定のめっき付着量に制御される。そして、ストリップ１００は、上記付着量制御用噴射ノズル１０８ａ，１０９ａと各々のパッドの出側に設けられた気体噴射ノズル１０８ｂ，１０９ｂから噴射されるガスによって生じた静圧により確実に保持され振動しないようになっている（特許文献２参照）。   As shown in FIG. 6, the strip 100 is subjected to a treatment such as surface cleaning in a pretreatment furnace, led to a hot dipping bath 101, and pulled up via a sink roll 102. 108 and the second hydrostatic pad 109 have their travel lines bent into an arc shape, and the excess molten zinc adhering to the strip 100 is attached to the strip entry side of each hydrostatic pad for controlling the amount of adhesion. It is scraped off by the gas from the nozzles 108a, 109a and controlled to a predetermined plating adhesion amount. The strip 100 is securely held by the static pressure generated by the gas jetted from the jet nozzles 108a and 109a for controlling the adhesion amount and the gas jet nozzles 108b and 109b provided on the outlet side of each pad, and does not vibrate. (See Patent Document 2).

特開平７−１８００１９号公報（図１）Japanese Patent Laid-Open No. 7-180019 (FIG. 1) 特開平７−１０２３５４号公報（図１）Japanese Patent Laid-Open No. 7-102354 (FIG. 1)

ところで、上述したようなめっき方法では、一般的に毎分１５０ｍ程度までのストリップ走行速度で亜鉛めっき鋼板の生産が行なわれてきている。このような溶融金属めっきラインの生産性向上には、めっきライン速度の高速化が必要となる。めっきライン速度即ちストリップ走行速度を高速化すると、前記ガスワイパー又は静圧パッドによるワイピング能力を上げる必要があり、能力アップのためにストリップ〜ノズル間の距離を近づけ且つガス噴射力を強める必要がある。   By the way, in the plating method as described above, production of galvanized steel sheets has been generally performed at a strip running speed of up to about 150 m / min. In order to improve the productivity of such a molten metal plating line, it is necessary to increase the plating line speed. When the plating line speed, that is, the strip traveling speed is increased, it is necessary to increase the wiping capability by the gas wiper or the static pressure pad, and it is necessary to increase the gas injection force by reducing the distance between the strip and the nozzle in order to increase the capability. .

ところが、上述した二つの従来例の方式では、ストリップ走行速度が毎分１５０ｍを越え、且つガス噴射力が強くなると、図７に示すように、ストリップ１００に付着して移動する厚い液膜１１０とワイピングノズル１０４等から噴射される強いワイピングガス（図中矢印参照）との衝突で、液膜１１０が崩壊しスプラッシュ（液滴の飛散）１１１が発生し（図７の（ｂ）参照）、このスプラッシュ１１１がワイパー出側まで拡がって板表面に付着し、膜厚増大や、表面品質欠陥を生じる。このためめっきライン速度を上げられないという問題点があった。   However, in the above-described two conventional methods, when the strip running speed exceeds 150 m / min and the gas injection force becomes strong, as shown in FIG. The collision with the strong wiping gas (see the arrow in the figure) ejected from the wiping nozzle 104 etc. causes the liquid film 110 to collapse and a splash (droplet scattering) 111 is generated (see FIG. 7B). Splash 111 spreads to the wiper exit side and adheres to the plate surface, resulting in an increase in film thickness and surface quality defects. For this reason, there was a problem that the plating line speed could not be increased.

そこで、本発明の目的は、スプラッシュのめっき面への付着などの膜厚増大や表面品質欠陥をなくし、毎分３００ｍ程度までのめっきライン速度で運転可能な高生産能力の溶融金属めっき方法及び設備を提供することにある。   Accordingly, an object of the present invention is to provide a high-productivity molten metal plating method and equipment capable of operating at a plating line speed of up to about 300 m / min, eliminating an increase in film thickness and surface quality defects such as adhesion of splash to the plating surface. Is to provide.

前記目的を達成するための本発明に係る溶融金属めっき方法は、鋼板を連続的に溶融金属ポットへ供給し通過させて鋼板表面に溶融金属をめっきする連続めっき方法であって、前記溶融金属ポットから出た鋼板を、当該鋼板両面に対向するブレードワイパーを通過させた後、同ブレードワイパーの出側部の圧力を高める圧力付加手段を通過させることを特徴とする。   In order to achieve the above object, the molten metal plating method according to the present invention is a continuous plating method in which a steel plate is continuously fed to a molten metal pot and passed through it to plate the molten metal on the surface of the steel plate. After passing the steel plate which came out from the blade wiper which opposes the both surfaces of the said steel plate, it is made to pass through the pressure addition means which raises the pressure of the exit side part of the same blade wiper.

また、本発明に係る溶融金属めっき設備は、鋼板を連続的に溶融金属ポットへ供給し通過させて鋼板表面に溶融金属をめっきする連続めっき設備であって、前記溶融金属ポットから出た鋼板に付着する溶融金属厚さを調整するために、前記鋼板両面に対向するブレードワイパーと、該ブレードワイパーのめっきライン下流側に設けられて同ブレードワイパーの出側部の圧力を高める圧力付加手段とを備えることを特徴とする。   Further, the molten metal plating facility according to the present invention is a continuous plating facility for continuously supplying and passing a steel plate to a molten metal pot and plating the molten metal on the surface of the steel plate. In order to adjust the thickness of the molten metal to be attached, a blade wiper opposed to both surfaces of the steel sheet, and a pressure applying means provided on the downstream side of the plating line of the blade wiper to increase the pressure of the exit side of the blade wiper It is characterized by providing.

また、前記圧力付加手段は、上下２個以上のエアー又はガス噴射口を有し、そのエアー又はガス噴射口で囲まれる部分に発生する大気圧より高い静圧部を鋼板の両面側に形成せしめる静圧パッド機構で構成されることを特徴とする。   Further, the pressure applying means has two or more air or gas injection ports on the upper and lower sides, and static pressure portions higher than the atmospheric pressure generated in a portion surrounded by the air or gas injection ports are formed on both sides of the steel plate. It is characterized by comprising a static pressure pad mechanism.

また、前記圧力付加手段は、鋼板の幅方向に延びるエアー又はガス供給用チャンバーに横長の単一のエアー又はガス噴射口を有したガスワイパー機構で構成されることを特徴とする。   Further, the pressure applying means is constituted by a gas wiper mechanism having a horizontally long single air or gas injection port in an air or gas supply chamber extending in the width direction of the steel plate.

また、前記ブレードワイパーがギャップ調整可能に設けられ、前記圧力付加手段が水平方向及び上下方向に位置調整可能に設けられることを特徴とする。   Further, the blade wiper is provided so that the gap can be adjusted, and the pressure applying means is provided so that the position can be adjusted in the horizontal direction and the vertical direction.

また、前記圧力付加手段のエアー又はガス噴射口の間隙は調整可能に設けられることを特徴とする。   Further, the air or gas injection port gap of the pressure applying means is provided to be adjustable.

また、前記圧力付加手段の全体の傾きあるいはエアー又はガス噴射口の角度が調整可能に設けられることを特徴とする。   Further, the entire inclination of the pressure applying means or the angle of the air or gas injection port is provided to be adjustable.

前記構成の本発明に係る溶融金属めっき方法及び設備よれば、ブレードワイパーによる一次的な余剰付着溶融金属の削ぎ落としとブレードワイパー出側部での高圧下により、スプラッシュの影響を効果的に回避して高品質化が図れることに加え、ブレードの入側と出側の圧力差によりブレードと板の間の溶融金属を押し下げる相乗効果により、めっきライン速度を増大して生産能力の向上が図れる。   According to the molten metal plating method and equipment according to the present invention having the above-described configuration, the influence of splash is effectively avoided by scraping off the primary excess adhered molten metal by the blade wiper and under high pressure at the blade wiper exit side. In addition to the improvement in quality, the synergistic effect of pushing down the molten metal between the blade and the plate due to the pressure difference between the inlet side and the outlet side of the blade can increase the plating line speed and improve the production capacity.

また、前記圧力付加手段は、上下２個以上のエアー又はガス噴射口を有し、そのエアー又はガス噴射口で囲まれる部分に発生する大気圧より高い静圧部を鋼板の両面側に形成せしめる静圧パッド機構で構成されるので、鋼板の制振作用が得られると共にエアー又はガスジェットの衝突によって発生するスプラッシュを封じ込められる利点がある。   Further, the pressure applying means has two or more air or gas injection ports on the upper and lower sides, and static pressure portions higher than the atmospheric pressure generated in a portion surrounded by the air or gas injection ports are formed on both sides of the steel plate. Since it is comprised by a static pressure pad mechanism, there exists an advantage which can contain the splash which generate | occur | produces the vibration suppression effect of a steel plate, and is generated by the collision of air or a gas jet.

また、前記圧力付加手段は、鋼板の幅方向に延びるエアー又はガス供給用チャンバーに横長の単一のエアー又はガス噴射口を有したガスワイパー機構で構成されるので、簡単な構成でスプラッシュの影響を効果的に回避して高品質化が図れると共にめっきライン速度を増大して生産能力の向上が図れる。   Further, since the pressure applying means is constituted by a gas wiper mechanism having a horizontally long single air or gas injection port in an air or gas supply chamber extending in the width direction of the steel plate, the influence of splash can be achieved with a simple structure. Can be effectively avoided to improve the quality, and the plating line speed can be increased to improve the production capacity.

また、前記ブレードワイパーがギャップ調整可能に設けられ、前記圧力付加手段が水平方向及び上下方向に位置調整可能に設けられるので、ブレードワイパーのギャップ調整に応じて圧力付加手段の設置位置を最適な位置に設定・変更することができる。   Further, since the blade wiper is provided so that the gap can be adjusted and the pressure applying means is provided so that the position of the pressure applying means can be adjusted in the horizontal direction and the vertical direction, the installation position of the pressure adding means can be adjusted to the optimum position according to the gap adjustment of the blade wiper. Can be set or changed.

また、前記圧力付加手段のエアー又はガス噴射口の間隙は調整可能に設けられるので、エアー又はガス噴射圧力を最適に制御することができる。   Further, since the gap of the air or gas injection port of the pressure applying means is adjustable, the air or gas injection pressure can be optimally controlled.

また、前記圧力付加手段の全体の傾きあるいはエアー又はガス噴射口の角度が調整可能に設けられるので、エアー又はガス噴射方向を最適に制御することができる。   Further, since the overall inclination of the pressure applying means or the angle of the air or gas injection port is provided so as to be adjustable, the air or gas injection direction can be optimally controlled.

以下、本発明に係る溶融金属めっき方法及び設備を実施例により図面を用いて詳細に説明する。   Hereinafter, the molten metal plating method and equipment according to the present invention will be described in detail with reference to the accompanying drawings.

図１は本発明の実施例１を示す溶融金属めっきラインのめっき付着量制御部付近の側面図、図２は図１の要部拡大断面図である。   FIG. 1 is a side view of the vicinity of a plating adhesion amount control part of a molten metal plating line showing Example 1 of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part of FIG.

図１において、ストリップ（鋼板）１は、溶融金属ポット２内のシンクロール３を通して上方へ送られ、上方に設けられたトップロール４から横方向に送られるようになっている。   In FIG. 1, a strip (steel plate) 1 is sent upward through a sink roll 3 in a molten metal pot 2, and is sent in a lateral direction from a top roll 4 provided above.

図中５は、溶融金属ポット２の浴面近くで上方へ移動するストリップ１の両面（表裏面）と対向させて設けためっき厚さ制御装置である。このめっき厚さ制御装置５は、浴面近くの高さ位置に設けたブレードワイパー６と、このブレードワイパー６の出側部に近づけてめっきライン下流側に設けた非接触の圧力付加手段７と、更にそのめっきライン下流側に設けた非接触のストリップ制振手段８とを備える。このストリップ制振手段８は図１中では１段のみを示すが、めっきライン方向へ複数段に設けても良い。   In the figure, reference numeral 5 denotes a plating thickness control device provided facing both surfaces (front and back surfaces) of the strip 1 moving upward near the bath surface of the molten metal pot 2. The plating thickness control device 5 includes a blade wiper 6 provided at a height near the bath surface, and a non-contact pressure applying means 7 provided on the downstream side of the plating line close to the exit side of the blade wiper 6. And a non-contact strip damping means 8 provided on the downstream side of the plating line. This strip damping means 8 shows only one stage in FIG. 1, but it may be provided in a plurality of stages in the plating line direction.

図２は、めっき厚さ制御装置５の具体例をストリップ１の片側だけで図示しているが、実際にはストリップ１を挾んで対称に設ける。尚、図２中１０は、溶融金属ポット２の浴中でストリップ１の両面に付着し上昇するめっき金属膜である。   FIG. 2 shows a specific example of the plating thickness control device 5 only on one side of the strip 1, but in actuality, the strip thickness 1 is sandwiched and provided symmetrically. In FIG. 2, reference numeral 10 denotes a plated metal film that adheres to and rises on both surfaces of the strip 1 in the bath of the molten metal pot 2.

図２において、ブレードワイパー６は、溶融めっき金属の付着し難い耐熱性の金属又はセラミックス材料などで形成され、相互に間隔（ギャップ）調整可能に支持して設けられている。   In FIG. 2, the blade wiper 6 is formed of a heat-resistant metal or a ceramic material to which hot-dipped metal does not easily adhere, and is provided so as to be able to adjust the gap (gap).

圧力付加手段７は、圧力付加機能と制振機能を併せもつ静圧パッド機構を用いた場合を示し、移動するストリップ１に対して水平方向及び上下方向へ位置調整可能に支持して設けられる。この形式の圧力付加手段７は、ストリップ１の幅方向に延びるエアー又はガス供給用チャンバー１１に設けた上下２個以上の幅方向に長い噴射口１２及び１３と、その上下の噴射口１２，１３間にストリップ１面と平行な耐圧壁１４を備え、上下の噴射口１２，１３から噴射するエアー又はガスがストリップ１面に当たって上下へ流れてめっき金属膜１０に沿う下向き圧力を付加するように機能し、同時にこの気流に囲まれる間隔内に静圧部１５が発生し維持されストリップ１の両面側で均衡することによりストリップ１を制振するように働く。   The pressure applying means 7 shows a case where a static pressure pad mechanism having both a pressure applying function and a vibration damping function is used, and is provided so as to be capable of adjusting the position in the horizontal and vertical directions with respect to the moving strip 1. This type of pressure applying means 7 includes two or more jet nozzles 12 and 13 which are provided in an air or gas supply chamber 11 extending in the width direction of the strip 1 and which are long in the width direction. A pressure-resistant wall 14 parallel to the surface of the strip 1 is provided between them, and air or gas injected from the upper and lower injection ports 12 and 13 hits the surface of the strip 1 and flows up and down to apply downward pressure along the plated metal film 10. At the same time, the static pressure portion 15 is generated and maintained within the space surrounded by the air flow, and works to dampen the strip 1 by balancing on both sides of the strip 1.

尚、図２に示す圧力付加手段７において、噴射口１２，１３の間隙ｂ1，ｂ2を調整可能に構成したり、圧力付加手段７全体の傾き又は噴射口１２，１３の角度を調整可能に構成すると好適である。 In the pressure applying means 7 shown in FIG. 2, the gaps b 1 and b 2 between the injection ports 12 and 13 can be adjusted, and the inclination of the pressure applying means 7 as a whole or the angles of the injection ports 12 and 13 can be adjusted. It is preferable to be configured as follows.

この場合、例えば、ストリップ１の通板速度を毎分３００ｍ以下の範囲内で運転させた場合、上下の噴射口１２と１３各々の間隙ｂ1，ｂ2に対し、下噴射口１３とブレードワイパー６上端との縦距離をＬ、噴射口１２，１３からストリップ１面までの間隙をＨとしたとき、Ｌを［（ｂ1＋ｂ2）×３０程度以下］、またＨを［（ｂ1＋ｂ2）×１０程度以下］で調整すると、前記噴射された気流の下向き流れがストリップ１面に付着した余剰な厚さのめっき金属膜１０を有効にワイピングし落下させることが、本発明者等による実験で確かめられている。 In this case, for example, when the strip plate 1 is operated at a speed of 300 m or less per minute, the lower injection port 13 and the blade wiper with respect to the gaps b 1 and b 2 between the upper and lower injection ports 12 and 13, respectively. 6 where L is the vertical distance from the upper end, and H is the gap from the injection ports 12 and 13 to the strip 1 surface, L is [(b 1 + b 2 ) × 30 or less], and H is [(b 1 + b According to the present inventors, the downward flow of the jetted air flow effectively wipes and drops the excessively thick plated metal film 10 adhering to the surface of the strip 1 when adjusted by 2 ) × 10 or less] It has been confirmed by experiments.

図２では、ストリップ制振手段８の図示を省略しているが、ストリップ制振手段８は必要に応じ、実施例２で詳述する静圧パッド式あるいは電磁コイル式のもの等が設けられる。   In FIG. 2, illustration of the strip damping means 8 is omitted, but the strip damping means 8 may be provided with a static pressure pad type or an electromagnetic coil type which will be described in detail in the second embodiment.

このように構成されるため、ストリップ１は、例えば３００ｍ以下の範囲の通板速度でシンクロール３から上方へ移動させられる。ストリップ１は、その両面に過剰な量のめっき溶融金属を伴ってブレードワイパー６間に入り、ブレードワイパー６の規制された隙間（ギャップ）で一次的に余分の付着溶融金属が削ぎ落とされる。即ち、ストリップ１は僅かな余剰厚さのめっき層を持つ状態でブレードワイパー６を通り抜ける。   Since it is configured in this way, the strip 1 is moved upward from the sink roll 3 at a plate passing speed in the range of 300 m or less, for example. The strip 1 enters between the blade wipers 6 with an excessive amount of plated molten metal on both sides thereof, and excess adhered molten metal is temporarily scraped off in a regulated gap (gap) of the blade wiper 6. That is, the strip 1 passes through the blade wiper 6 with the plating layer having a slight excess thickness.

ブレードワイパー６の出側部は、圧力付加手段７による下向きガス流で圧力が高く保たれるため、圧力を付加しない場合よりブレードワイパー６の出口部（図２中のＡ部）でのめっき溶融金属の流速が低減される。即ち、めっき付着量が低減する。更に、圧力付加手段７によるガスジェット衝突部近傍（図２中のＢ部）でもめっき溶融金属の流速が低減するため、２段のワイピング効果が生じるようになる。   Since the pressure at the outlet side of the blade wiper 6 is kept high by the downward gas flow by the pressure applying means 7, the plating melt at the outlet portion (A portion in FIG. 2) of the blade wiper 6 than when no pressure is applied. The metal flow rate is reduced. That is, the plating adhesion amount is reduced. Furthermore, since the flow rate of the molten metal is reduced also in the vicinity of the gas jet collision portion (B portion in FIG. 2) by the pressure applying means 7, a two-stage wiping effect is produced.

このとき、ストリップ１は圧力付加手段７の静圧部１５による制振作用で振動を抑制されつつ上方へ移動し、Ｂ部から逆流する溶融金属流れは、ブレードワイパー６の上面沿いに排出されるため、Ａ部で液溜まりが発生しなくなる。また、Ｂ部でのガスジェットの衝突によって発生するスプラッシュ１０ａは圧力付加手段７の上側の噴射口１２からのガスジェットにより封じ込まれ、圧力付加手段７から上方へは放出しなくなる。   At this time, the strip 1 moves upward while vibration is suppressed by the damping action of the static pressure portion 15 of the pressure applying means 7, and the molten metal flow flowing backward from the B portion is discharged along the upper surface of the blade wiper 6. Therefore, no liquid pool is generated in the A part. Further, the splash 10 a generated by the collision of the gas jet at the portion B is sealed by the gas jet from the upper injection port 12 of the pressure applying means 7 and is not released upward from the pressure applying means 7.

このため、圧力付加手段７とストリップ１の表面との間隔Ｈ及びブレードワイパー６上端との縦距離Ｌを前掲のように、Ｈ＝［（ｂ1＋ｂ2）×１０程度以下（例えばｂ1、ｂ2＝０．５の時、１０ｍｍ以下］、Ｌ＝［（ｂ1＋ｂ2）×３０程度以下（例えばｂ1、ｂ2＝０．５の時、３０ｍｍ以下）］で調整することにより、ストリップ１にスプラッシュ痕など表面品質欠陥のない均一膜厚のめっき（めっき金属膜）を連続形成できるようになる。 Therefore, the distance H between the pressure applying means 7 and the surface of the strip 1 and the vertical distance L between the upper end of the blade wiper 6 are about H = [(b 1 + b 2 ) × 10 or less (for example, b 1 , When b 2 = 0.5, 10 mm or less], L = [(b 1 + b 2 ) × 30 or less (for example, b 1 , b 2 = 0.5, 30 mm or less)] The strip 1 can be continuously formed with a uniform film thickness (plated metal film) free from surface quality defects such as splash marks.

また、本実施例では、圧力付加手段７が制振機能を有するため、図１で示した専用のストリップ制振手段８を省略し、もしくは設置数を低減することが可能である。   Further, in this embodiment, since the pressure applying means 7 has a vibration damping function, the dedicated strip damping means 8 shown in FIG. 1 can be omitted or the number of installations can be reduced.

これらの結果、本実施例によれば、めっきライン速度を大幅に増加させて、スプラッシュ１０ａの影響の発生しない高品質の高生産能力の溶融金属めっき方法と設備を提供することができる。   As a result, according to the present embodiment, the plating line speed can be greatly increased to provide a high-quality, high-productivity molten metal plating method and equipment that are not affected by the splash 10a.

図３は本発明の実施例２を示す溶融金属めっきラインのめっき付着量制御部付近の側面図、図４は図３の変形例を示すめっき付着量制御部付近の側面図である。   FIG. 3 is a side view of the vicinity of a plating adhesion amount control unit of a molten metal plating line showing Embodiment 2 of the present invention, and FIG. 4 is a side view of the vicinity of a plating adhesion amount control unit showing a modification of FIG.

この実施例は、実施例２における圧力付加手段７として単一の噴射口を持つガスワイパー機構を設け、ストリップ制振手段８として静圧パッド機構（図３の例）又は電磁式制振機構（図４の例）を設けて構成した例である。   In this embodiment, a gas wiper mechanism having a single injection port is provided as the pressure applying means 7 in the second embodiment, and a static pressure pad mechanism (example of FIG. 3) or an electromagnetic damping mechanism (as shown in FIG. 3) is provided as the strip damping means 8. It is an example provided and provided with the example of FIG.

図３及び図４に示すように、圧力付加手段７は、ストリップ１の幅方向に延びるエアー又はガス供給用チャンバー２１に横長の単一の噴射口２２を備えてなり、移動するストリップ１に対して水平方向及び上下方向へ位置調整可能に及び噴射角度を変更可能に支持して設ける。   As shown in FIGS. 3 and 4, the pressure applying means 7 includes a horizontally long single injection port 22 in an air or gas supply chamber 21 extending in the width direction of the strip 1. Thus, the position can be adjusted in the horizontal direction and the vertical direction, and the injection angle can be changed and supported.

図３中では、噴射口２２はある角度下傾斜して設け、ストリップ１面までの間隔Ｈと、ブレードワイパー６上端との縦距離Ｌは、実施例１の場合と同様に調整して設け、エアー又はガスが噴射口２２からストリップ１側へ斜め下方に噴射することでストリップ１面のめっき金属膜１０をワイピングすると同時に、ブレードワイパー６の出側部付近の圧力を高め、ワイピングした溶融金属をブレードワイパー６の上面沿いに図中外側へ押し流し溶融金属ポット２の浴中に戻すようにしている。   In FIG. 3, the injection port 22 is inclined at a certain angle, and the distance H to the strip 1 surface and the vertical distance L between the upper end of the blade wiper 6 are adjusted and provided in the same manner as in the first embodiment. Air or gas is jetted obliquely downward from the jet port 22 toward the strip 1 side to wipe the plated metal film 10 on the surface of the strip 1, and at the same time, the pressure near the exit side of the blade wiper 6 is increased, Along the upper surface of the blade wiper 6, it is pushed outward in the figure and returned to the bath of the molten metal pot 2.

ストリップ制振手段８として設けた静圧パッド機構３１（図３の例）は、上下のエアー又はガス噴射口１２，１３と耐圧壁１４とストリップ１で囲まれる静圧部１５をストリップ１の両面側で均衡させることによりストリップ１を制振する。   The static pressure pad mechanism 31 (example in FIG. 3) provided as the strip damping means 8 is configured so that the upper and lower air or gas injection ports 12 and 13, the pressure resistant wall 14, and the static pressure portion 15 surrounded by the strip 1 are disposed on both surfaces of the strip 1. The strip 1 is damped by balancing on the side.

また、ストリップ制振手段８として設けた電磁式制振機構３２（図４の例）は、ストリップ１と直角方向の磁場を発生するように備えた１又は複数個の電磁コイルからなり、ストリップ１の両面側で磁場の向きを逆に及び強さを均衡させることによりストリップ１を制振する。   The electromagnetic damping mechanism 32 (example of FIG. 4) provided as the strip damping means 8 is composed of one or a plurality of electromagnetic coils provided to generate a magnetic field in a direction perpendicular to the strip 1. The strip 1 is damped by reversing the direction of the magnetic field and balancing the strength on both sides.

尚、圧力付加手段７と制振手段８は上記に限定されず、例えば圧力付加手段７は単一の噴射口２２の間隙ｂ3を調整可能に構成するなど、更に異なった形式で構成されても良い。 The pressure applying means 7 and the vibration damping means 8 are not limited to those described above. For example, the pressure applying means 7 is configured in a further different form, for example, the gap b 3 of the single injection port 22 can be adjusted. Also good.

このように構成されるため、本実施例の場合にも、ガスワイパー機構からなる圧力付加手段７の噴射口２２とストリップ１の間隔Ｈと、ブレードワイパー６上端と噴射口２２の縦距離Ｌは、実施例１の場合と同様の範囲で調整される。   Due to such a configuration, also in the case of the present embodiment, the distance H between the injection port 22 and the strip 1 of the pressure applying means 7 comprising the gas wiper mechanism, and the vertical distance L between the blade wiper 6 upper end and the injection port 22 are as follows. The adjustment is made in the same range as in the first embodiment.

従って、圧力付加手段７は、噴射口２２から水平あるいは斜め下方へ噴射するエアー又はガスジェット流によりブレードワイパー６の出側部付近の圧力を高め、ストリップ１面のめっき金属膜１０をワイピングし、ワイピングした溶融金属及びそのスプラッシュ１０ａをブレードワイパー６の上面沿いに図中外側へ押し流し溶融金属ポット２の浴中に戻す。   Accordingly, the pressure applying means 7 increases the pressure in the vicinity of the exit side of the blade wiper 6 by the air or gas jet flow jetted horizontally or obliquely downward from the jet port 22 to wipe the plated metal film 10 on the surface of the strip 1, The wiped molten metal and its splash 10a are pushed outward along the upper surface of the blade wiper 6 in the figure and returned to the molten metal pot 2 bath.

図３のような静圧パッド機構３１からなるストリップ制振手段８、又は図４のような電磁式制振機構３２からなるストリップ制振手段８でストリップ１を制振しながら、ストリップ１をブレードワイパー６及び前記のような間隔Ｈ、縦距離Ｌに調整された圧力付加手段７を通過させることによって、実施例１の場合と同様な作用・効果を得ることができる。   While the strip 1 is damped by the strip damping means 8 comprising the static pressure pad mechanism 31 as shown in FIG. 3 or the strip damping means 8 comprising the electromagnetic damping mechanism 32 as shown in FIG. By passing the wiper 6 and the pressure applying means 7 adjusted to the distance H and the longitudinal distance L as described above, the same operation and effect as in the case of the first embodiment can be obtained.

本発明の実施例１を示す溶融金属めっきラインのめっき付着量制御部付近の側面図である。It is a side view of the plating adhesion amount control part vicinity of the molten metal plating line which shows Example 1 of this invention. 同じく図１の要部拡大断面図である。It is a principal part expanded sectional view of FIG. 本発明の実施例２を示す溶融金属めっきラインのめっき付着量制御部付近の側面図である。It is a side view near the plating adhesion amount control part of the molten metal plating line which shows Example 2 of this invention. 同じく図３の変形例を示すめっき付着量制御部付近の側面図である。FIG. 4 is a side view of the vicinity of a plating adhesion amount control unit that similarly shows a modification of FIG. 3. 従来の溶融金属めっきラインのめっき付着量制御部付近の側面図である。It is a side view near the plating adhesion amount control part of the conventional molten metal plating line. 異なった従来の溶融金属めっきラインのめっき付着量制御部付近の側面図である。It is a side view near the plating adhesion amount control part of a different conventional molten metal plating line. 従来の溶融金属めっきラインのめっき付着量制御部における不具合を示す説明図である。It is explanatory drawing which shows the malfunction in the plating adhesion amount control part of the conventional molten metal plating line.

符号の説明Explanation of symbols

１ ストリップ
２ 溶融金属ポット
３ シンクロール
４ トップロール
５ めっき厚さ制御装置
６ ブレードワイパー
７ 圧力付加手段
８ ストリップ制振手段
１０ めっき金属膜
１０ａ スプラッシュ
１１ チャンバー
１２ 噴射口
１３ 噴射口
１４ 耐圧壁
１５ 静圧部
２１ チャンバー
３１ 静圧パッド機構
３２ 電磁式制振機構 DESCRIPTION OF SYMBOLS 1 Strip 2 Molten metal pot 3 Sink roll 4 Top roll 5 Plating thickness control apparatus 6 Blade wiper 7 Pressure application means 8 Strip vibration control means 10 Plating metal film 10a Splash 11 Chamber 12 Injection port 13 Injection port 14 Pressure wall 15 Static pressure Part 21 Chamber 31 Static pressure pad mechanism 32 Electromagnetic damping mechanism

Claims (7)

鋼板を連続的に溶融金属ポットへ供給し通過させて鋼板表面に溶融金属をめっきする連続めっき方法であって、前記溶融金属ポットから出た鋼板を、当該鋼板両面に対向するブレードワイパーを通過させた後、同ブレードワイパーの出側部の圧力を高める圧力付加手段を通過させることを特徴とする溶融金属めっき方法。   A continuous plating method in which a steel plate is continuously supplied to a molten metal pot and passed to plate the molten metal on the surface of the steel plate, and the steel plate coming out of the molten metal pot is passed through a blade wiper facing both sides of the steel plate. And a pressure applying means for increasing the pressure on the outlet side of the blade wiper. 鋼板を連続的に溶融金属ポットへ供給し通過させて鋼板表面に溶融金属をめっきする連続めっき設備であって、前記溶融金属ポットから出た鋼板に付着する溶融金属厚さを調整するために、前記鋼板両面に対向するブレードワイパーと、該ブレードワイパーのメッキライン下流側に設けられて同ブレードワイパーの出側部の圧力を高める圧力付加手段とを備えることを特徴とする溶融金属めっき設備。   A continuous plating facility for continuously supplying and passing a steel plate to a molten metal pot and plating the molten metal on the surface of the steel plate, in order to adjust the thickness of the molten metal attached to the steel plate coming out of the molten metal pot, A molten metal plating facility comprising: a blade wiper opposed to both surfaces of the steel sheet; and pressure applying means provided on a downstream side of the plating line of the blade wiper to increase the pressure of the outlet side of the blade wiper. 前記圧力付加手段は、上下２個以上のエアー又はガス噴射口を有し、そのエアー又はガス噴射口で囲まれる部分に発生する大気圧より高い静圧部を鋼板の両面側に形成せしめる静圧パッド機構で構成されることを特徴とする請求項２記載の溶融金属めっき設備。   The pressure applying means has two or more air or gas injection ports on the upper and lower sides, and a static pressure higher than the atmospheric pressure generated in a portion surrounded by the air or gas injection ports is formed on both sides of the steel plate. The molten metal plating facility according to claim 2, comprising a pad mechanism. 前記圧力付加手段は、鋼板の幅方向に延びるエアー又はガス供給用チャンバーに横長の単一のエアー又はガス噴射口を有したガスワイパー機構で構成されることを特徴とする請求項２記載の溶融金属めっき設備。   3. The melting according to claim 2, wherein the pressure applying means is constituted by a gas wiper mechanism having a horizontally long single air or gas injection port in an air or gas supply chamber extending in the width direction of the steel sheet. Metal plating equipment. 前記ブレードワイパーがギャップ調整可能に設けられ、前記圧力付加手段が水平方向及び上下方向に位置調整可能に設けられることを特徴とする請求項２、３又は４記載の溶融金属めっき設備。   The molten metal plating facility according to claim 2, 3 or 4, wherein the blade wiper is provided so that the gap can be adjusted, and the pressure applying means is provided so that the position can be adjusted in the horizontal direction and the vertical direction. 前記圧力付加手段のエアー又はガス噴射口の間隙は調整可能に設けられることを特徴とする請求項３、４又は５記載の溶融金属めっき設備。   The molten metal plating facility according to claim 3, 4 or 5, wherein a gap between the air or the gas injection port of the pressure applying means is adjustable. 前記圧力付加手段の全体の傾きあるいはエアー又はガス噴射口の角度が調整可能に設けられることを特徴とする請求項３、４、５又は６記載の溶融金属めっき設備。   The molten metal plating facility according to claim 3, 4, 5, or 6, wherein the entire inclination of the pressure applying means or the angle of the air or gas injection port is adjustable.
JP2003414229A 2003-12-12 2003-12-12 Hot dip metal plating method and apparatus Withdrawn JP2005171336A (en)

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KR100761307B1 (en) * 2005-09-13 2007-09-27 미쯔비시 히다찌 세이떼쯔 기까이 가부시끼가이샤 Liquid wiping apparatus
JP2008138259A (en) * 2006-12-04 2008-06-19 Jfe Steel Kk Apparatus for producing hot dip metal plated steel strip, and method for producing hot dip metal plated steel strip
US8079323B2 (en) 2004-04-13 2011-12-20 Mitsubishi-Hitachi Metals Machinery, Inc. Liquid wiping apparatus
WO2017129391A1 (en) * 2016-01-29 2017-08-03 Centre De Recherches Metallurgiques Asbl - Centrum Voor Research In De Metallurgie Vzw Device for hydrodynamic stabilisation of a continuously travelling metal strip

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8079323B2 (en) 2004-04-13 2011-12-20 Mitsubishi-Hitachi Metals Machinery, Inc. Liquid wiping apparatus
KR100761307B1 (en) * 2005-09-13 2007-09-27 미쯔비시 히다찌 세이떼쯔 기까이 가부시끼가이샤 Liquid wiping apparatus
JP2008138259A (en) * 2006-12-04 2008-06-19 Jfe Steel Kk Apparatus for producing hot dip metal plated steel strip, and method for producing hot dip metal plated steel strip
WO2017129391A1 (en) * 2016-01-29 2017-08-03 Centre De Recherches Metallurgiques Asbl - Centrum Voor Research In De Metallurgie Vzw Device for hydrodynamic stabilisation of a continuously travelling metal strip
BE1023837B1 (en) * 2016-01-29 2017-08-09 Centre De Recherches Metallurgiques Asbl DEVICE FOR THE HYDRODYNAMIC STABILIZATION OF A CONTINUOUSLY CONTINUOUS METAL STRIP
JP2019504926A (en) * 2016-01-29 2019-02-21 サントル ド ルシェルシュ メタリュルジク アエスベエル−セントラム ヴォール リサーチ イン デ メタルージー フェーゼットヴェー Apparatus for hydrodynamic stabilization of continuously running metal strips.
US10550459B2 (en) 2016-01-29 2020-02-04 Centre De Recherches Metallurgiques Asbl-Centrum Voor Research In De Metallurgie Vzw Device for hydrodynamic stabilization of a continuously travelling metal strip
RU2715933C2 (en) * 2016-01-29 2020-03-04 Сентр Де Решерш Металлюржик Асбл - Сентрум Воор Ресёч Ин Де Металлюржи Взв Device for hydrodynamic stabilization of continuously drawn metal strip

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