JPH02205663A - Method for controlling plating deposition of hot dip coating and gas injection nozzle to be used in this method - Google Patents
Method for controlling plating deposition of hot dip coating and gas injection nozzle to be used in this methodInfo
- Publication number
- JPH02205663A JPH02205663A JP2323489A JP2323489A JPH02205663A JP H02205663 A JPH02205663 A JP H02205663A JP 2323489 A JP2323489 A JP 2323489A JP 2323489 A JP2323489 A JP 2323489A JP H02205663 A JPH02205663 A JP H02205663A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- gas
- nozzle component
- auxiliary
- divided
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 48
- 239000007924 injection Substances 0.000 title claims abstract description 48
- 238000007747 plating Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 12
- 230000008021 deposition Effects 0.000 title abstract 2
- 238000003618 dip coating Methods 0.000 title abstract 2
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 230000001154 acute effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 45
- 230000000630 rising effect Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 210000004894 snout Anatomy 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 206010009696 Clumsiness Diseases 0.000 description 1
- 241001504592 Trachurus trachurus Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、金属帯の連続溶融めっきの際、金属帯の幅方
向付着量を気体噴射ノズルにより均一に制御できる方法
およびその方法に使用する気体噴射ノズルに関する。Detailed Description of the Invention (Field of Industrial Application) The present invention provides a method for uniformly controlling the amount of coating in the width direction of a metal strip using a gas injection nozzle during continuous hot-dip plating of the metal strip, and a method for use in the method. Related to gas injection nozzles.
（従来技術）
銅帯の連続溶融めっきは、第３図に示すように、鋼帯１
を前処理帯で活性化した後、スナウト２よりめっｂ磯の
ジンクロール３でめっき浴４に案内してめっ終し、その
後、トップロール５で上方に導く方法で行っている。こ
の際、めっき付着量の制御は、鋼帯１がめつき浴４から
出た直後の部分の両側に１対の気体噴射ノズル６を配置
して、そこより空気、燃焼排〃スまたは窒素などの気体
を鋼帯１に噴射して、その圧力で過剰に付着しためつき
金属を吹拭する方法で行っている。(Prior art) As shown in Fig. 3, continuous hot-dip plating of copper strip
After activating it in a pretreatment zone, it is guided from a snout 2 to a plating bath 4 with a zinc roll 3 of plating biso to finish plating, and then guided upward with a top roll 5. At this time, the coating amount can be controlled by placing a pair of gas injection nozzles 6 on both sides of the part immediately after the steel strip 1 comes out of the plating bath 4, and injecting air, combustion exhaust, nitrogen, etc. This is done by injecting gas onto the steel strip 1 and using the pressure to blow off the excess stuck metal.
ところで、この噴射気体の吹拭に従来上り一般に使用さ
れている気体噴射ノズル６は、第４図に断面を示すよう
に、圧力室７にスリット状の噴射口８を設けたものであ
るが、このノズルで噴射口８の幅方向隙間を一定にする
と、エツジ部の付着量が中央部に比べて多いエツジオー
バーコートが生じる。このため、これを解消するために
、噴射口８のエツジ部＠ＩＩ！闇を広くして、エツジ部
に多量の気体が噴射されるようにしたり、エツジ部側の
ノズル先端を鋼帯１方向に突出させて、ノズル先端を鋼
帯１に接近させ、エツジ部に衝突する気体圧力が＾くな
るようにしたりしている（特公昭５１−３６７０９号、
同５１−４００１７号、同５２−３２３３０号、同５４
−２４９６９号）。By the way, the gas injection nozzle 6 which has been conventionally and generally used for blowing off the injection gas has a pressure chamber 7 provided with a slit-shaped injection port 8, as shown in cross section in FIG. When the gap in the width direction of the injection port 8 is made constant with this nozzle, an edge overcoat is generated in which the amount of coating on the edge portion is larger than that on the center portion. Therefore, in order to solve this problem, the edge part of the injection port 8 @II! Make the darkness wider so that a large amount of gas is injected at the edge, or make the nozzle tip on the edge side protrude in one direction of the steel strip, bring the nozzle tip closer to the steel strip 1, and collide with the edge. (Special Publication No. 51-36709,
No. 51-40017, No. 52-32330, No. 54
-24969).
（発明が解決しようとする問題点）
しかし、これらのノズルでエツジオーバーコートが生じ
ないのは、上昇する鋼帯１が吹拭される位置で平坦であ
る場合で、平坦でないと防止できない、しかるに、鋼帯
１は、ジンクロール３とトップロール５で張力を付与し
た状態で上昇するのであるから、平坦な状Ｂｔ′は上昇
せず、吹拭位置で幅方向に湾曲する。そこで、これを防
止するのに、鋼帯１が離脱する直前のめっき浴４の内部
にスナップロール９（第３図）を鋼帯１と平行に配置し
て銅帯面を押したり、図示してないが、気体噴射ノズル
６の上方に同様のロールを配置している。(Problem to be Solved by the Invention) However, edge overcoat does not occur with these nozzles when the rising steel strip 1 is flat at the position where it is blown off. Since the steel strip 1 is raised under tension by the zinc roll 3 and the top roll 5, the flat state Bt' does not rise, but curves in the width direction at the wiping position. Therefore, in order to prevent this, a snap roll 9 (Fig. 3) is placed inside the plating bath 4 immediately before the steel strip 1 is separated from the steel strip 1, and a snap roll 9 (Fig. 3) is placed parallel to the steel strip 1 to push the copper strip surface. However, a similar roll is placed above the gas injection nozzle 6.
しかし、前者の方法で鋼帯１を平坦にするには、スナッ
プロール９に鋼帯１の湾曲に対応したロールクラウンを
形成しておく必要があるが、挽業中にこのロールクラウ
ンが摩耗や溶損により変化してしまう、特に溶融アルミ
ニウムめっきの場合は、溶損が激しく、スナップロール
９を頻繁に交換せざるを得ないものであった。このため
、板厚、板幅、材質などに対応して長期間平坦に保つこ
とば困難であった。However, in order to flatten the steel strip 1 using the former method, it is necessary to form a roll crown on the snap roll 9 that corresponds to the curvature of the steel strip 1. Particularly in the case of hot-dip aluminum plating, which changes due to melting loss, the melting loss is severe and the snap roll 9 has to be replaced frequently. For this reason, it has been difficult to maintain a flat surface for a long period of time depending on the plate thickness, plate width, material, etc.
また、後者の方法にしてら、板厚や付着量によりめっき
層の凝固する時間が異なるため、板厚が厚かったり、付
着量が多かったりすると、スナップロール位！ｉ！＊で
上昇する間に凝固せず、スナップロールとの接触により
外観が損なわれでしまう場合があった。Also, if you use the latter method, the time it takes for the plating layer to solidify varies depending on the board thickness and the amount of adhesion, so if the board is thick or the amount of adhesion is large, it will be like a snap roll! i! *In some cases, the product did not solidify while rising, and the appearance was damaged due to contact with the snap roll.
本発明は、鋼帯１が吹拭位置で平坦であっても、また湾
曲していてもエツジオーバーコート発生を防止できるこ
とはもとより、鋼帯１の他のｆｆｌＳ分でオーバーコー
トが発生しても、それを防止して、幅方向付着量をも−
することができる気体噴射ノズルによるめっき付着量制
御方法とその方法に使用する気体噴射ノズルを提供する
ものである。The present invention can not only prevent the occurrence of edge overcoat even if the steel strip 1 is flat or curved at the wiping position, but also prevent overcoat from occurring in other fflS parts of the steel strip 1. , prevent this and reduce the amount of adhesion in the width direction.
The present invention provides a method for controlling the amount of plating deposited using a gas injection nozzle, and a gas injection nozzle used in the method.
（問題点を解決するための手段）
本発明は、めっき浴から上昇した直後の金属帯にスリッ
ト状のノズルから気体を噴射して、過剰に付着しためっ
き金属を除去するめっき付着量制御方法において、ノズ
ルから噴射した気体噴流の外側に少なくとも金属帯の幅
方向に３分割以上された他のノズルより気体を同方向か
ら斜めに噴射して、気体噴流の外側に気体の強制的流れ
を形成するとともに、その強制的流れのノズル各分割位
置での強さを制御することにより金属帯輻方向のめっき
付着量を均一にでさるようにした。(Means for Solving the Problems) The present invention provides a method for controlling the amount of plating in which excessively adhered plating metal is removed by injecting gas from a slit-shaped nozzle onto the metal strip immediately after it has risen from the plating bath. , to the outside of the gas jet injected from the nozzle, gas is injected obliquely from the same direction from other nozzles that are divided into at least three parts in the width direction of the metal band, thereby forming a forced flow of gas outside the gas jet. At the same time, by controlling the strength of the forced flow at each divided position of the nozzle, the amount of plating deposited in the metal band direction was made uniform.
そして、このような二重気体噴射を行うノズルとして、
スリット状の噴射口を構成する外面が鋭角である主ノズ
ル構成部材両性側に構成補助ノズル構成部材を配置して
、該補助ノズル端成部材と主ノズル構成部材外面とで主
ノズル構成部材の噴射方向に対して鋭角に噴射するスリ
ット状の噴射口を両噴射口が平行になるように形成し、
補助ノズル楕成部材を幅方向に少なくとも３分割以上に
するとともに、その各分割部材を独立して噴射方向に進
退できる構造のものを開発した。And, as a nozzle that performs such double gas injection,
An auxiliary nozzle component is arranged on both sides of the main nozzle component whose outer surface forming a slit-shaped injection port has an acute angle, and the auxiliary nozzle component and the outer surface of the main nozzle component inject the main nozzle component. A slit-shaped injection port that injects water at an acute angle to the direction is formed so that both injection ports are parallel to each other.
We have developed a structure in which the auxiliary nozzle oval member is divided into at least three parts in the width direction, and each of the divided parts can be moved forward and backward in the injection direction independently.
（作用）
一般に、スリット状噴射口のノズルより噴射した気体の
噴流は、周囲の気体との摩擦抵抗により上下に広がり、
６Ｌ流となって速度が低下し、吹拭効果が小さくなるが
、気体噴射による付着量制御では、気体を同一圧力で噴
射しても、上下に広からないようにすれば、噴射時の初
速度が保存されるポテンシャルコア長さが伸び、金属帯
に衝突した場合の吹拭効果が大きい。(Function) Generally, the jet of gas injected from the slit-shaped nozzle spreads upward and downward due to frictional resistance with the surrounding gas.
6L flow, the speed decreases and the wiping effect becomes smaller, but when controlling the adhesion amount by gas injection, even if the gas is injected at the same pressure, if the gas is not spread vertically, the initial The length of the potential core where velocity is conserved increases, and the blowing effect when colliding with the metal band is large.
そこで、ノズル（説明のためにこのノズルを主ノズルと
する）から噴射した気体噴流の外側に他のノズル（同様
にこのノズルを補助ノズルとする）から気体を同方向か
ら斜めに噴射すると、主ノズルよりの噴流の周囲に気体
の強制的な流れが形成されで、噴流の受ける摩擦抵抗が
小さくなり、ポテンシャルコア長さが伸びる。Therefore, if we inject gas obliquely from the same direction from another nozzle (similarly, this nozzle will be used as an auxiliary nozzle) to the outside of the gas jet injected from the nozzle (this nozzle will be used as the main nozzle for the sake of explanation), A forced flow of gas is formed around the jet from the nozzle, reducing the frictional resistance that the jet receives and increasing the length of the potential core.
従って、金属帯の幅方向で一部の付着量が多い場合、分
割補助ノズルの対応する部分の相対的ポテンシャルコア
長さを伸ばせば、付着量を少なくすることができるので
、幅方向の付着量を均一にすることができる０例えば、
エツジオーバーコートが発生している場合、主ノズルよ
り噴射した気体の金属帯エツ７部対応部分外側だけに補
助ノズルから気体を噴射するか、または補助ノズル全体
から気体を噴射させて、エツジｎ対応部分外側での噴射
が他の部分より強くなるようにすれば、その強くした部
分のポテンシャルコア長さが伸びるので、エツジオーバ
ーコート発生を防止できる。Therefore, if the amount of adhesion is large in one part of the metal strip in the width direction, the amount of adhesion can be reduced by increasing the relative potential core length of the corresponding part of the split auxiliary nozzle. For example,
If edge overcoat has occurred, either inject gas from the auxiliary nozzle only to the outer side of the metal band edge 7 of the gas injected from the main nozzle, or inject gas from the entire auxiliary nozzle to prevent edge overcoat. If the jetting is made stronger on the outside of the part than on other parts, the length of the potential core in the strengthened part will be increased, thereby preventing the occurrence of edge overcoat.
このポテンシャルコア長さの調節は、主ノズルよりの気
体噴流法がりを噴流せん新領域におけるその噴流圧力（
Ｐｏ）とこの噴流の外側を流れる補助ノズルよりの気体
噴流圧力（Ｐ、）の比（Ｐ、／ＰＧ）や両噴流の衝突角
度をａ整することにより行うことができる。この調節を
具体的に行うには、主ノズルの噴射位置に対する各分割
補助ノズルの噴射前後位置が異なるようにすればよい。Adjustment of this potential core length reduces the gas jet flow from the main nozzle and its jet pressure (
This can be done by adjusting the ratio (P, /PG) of the gas jet pressure (P, ) from the auxiliary nozzle flowing outside this jet and the collision angle of both jets. To specifically perform this adjustment, the injection positions of each divided auxiliary nozzle may be made different from the injection position of the main nozzle.
気体噴射ノズルでは、主ノズル構成部材で噴射口が入リ
ット状の主ノズルが形成され、また、主ノズル構成部材
の鋭角な外面と補助ノズル構成部材とで噴射口が同様の
形状の補助ノズルが形成される。しかも、両ノズルの噴
射口は平行で、補助ノズルの噴射方向は、主ノズルの噴
射方向に対して鋭角になっている。従って、補助ノズル
からの気体噴流は、主ノズルよりの気体噴流同方向から
斜めに衝突し、その外側に強制的な流れを形成する。In a gas injection nozzle, a main nozzle with a ret-shaped injection port is formed by the main nozzle component, and an auxiliary nozzle whose injection port has a similar shape is formed by the acute-angled outer surface of the main nozzle component and the auxiliary nozzle component. It is formed. Moreover, the injection ports of both nozzles are parallel, and the injection direction of the auxiliary nozzle is at an acute angle with respect to the injection direction of the main nozzle. Therefore, the gas jet from the auxiliary nozzle collides obliquely from the same direction as the gas jet from the main nozzle, forming a forced flow on the outside.
また、補助ノズル構成部材は、ノズル幅方向に分割しで
あり、その各分割部材は、噴射方向に進退できる構造に
しであるので、噴流速度が同じでも、前進させた部分は
、主ノズル噴流と近くで衝突して、主ノズル噴流の基部
からその外側に強制的流れを形成し、ポテンシャルコア
！！ｃさを伸びさせる。従って、エツジオーバーコート
防止の場合には、金属帯の幅に合わせて、エツジ部の分
割部材を他の中央部ｇＡ部材より前進させておけば、防
止できる。同様に、他の部分でのオーバーコートを防止
するには、その部分の分１１４部材を他の部分より前進
させればよい、この際、補助ノズル構成部材の前進させ
た分割部材と隣接部材との位置がずれていても、各分割
部材境界での噴流方向は、急激に変化することはないの
で、境界で付着量が急に変化することはない。In addition, the auxiliary nozzle component is divided in the nozzle width direction, and each divided member has a structure that allows it to move forward and backward in the jet direction, so even if the jet velocity is the same, the part that is moved forward will be the same as the main nozzle jet. Collisions nearby, forming a forced flow from the base of the main nozzle jet to its outside potential core! ! Extends clumsiness. Therefore, in the case of preventing edge overcoat, it can be prevented by moving the dividing member at the edge portion forward from the other central portion gA member in accordance with the width of the metal band. Similarly, in order to prevent overcoating in other parts, the portion 114 of that part can be advanced more than the other parts.In this case, the advanced divided member of the auxiliary nozzle component and the adjacent member Even if the position of the split member is shifted, the direction of the jet flow at the boundary of each divided member will not change suddenly, so the amount of adhesion will not change suddenly at the boundary.
補助ノズル構成部材を分割しておけば、操業中に金属帯
の清白程度や板幅が変化しても、その変化に対応して前
進もしくは後退させる分１！４部材の数や位置を調整す
ることにより幅方向の付着量を均一に調整できる。By dividing the auxiliary nozzle components, even if the degree of cleanliness or plate width of the metal strip changes during operation, the number and position of the 1!4 components can be adjusted by moving them forward or backward in response to the changes. By doing so, the amount of adhesion in the width direction can be adjusted uniformly.
なお、補助ノズル構成部材の分割を少なくとも３分割以
上にしたのは、エツジオーバーコート防止のために、少
なくとも、金属帯の中央部に対応する部分１個と、両側
のエツジ部に対応する部分２個から構成する必要がある
からである。補助ノズル構成部材の分割は、１１〜７分
割程度にすると、めっきする金属帯の幅が種々変化して
も、板幅方向の付着量を均一にすることができる。The reason why the auxiliary nozzle component is divided into at least three parts is to prevent edge overcoat, at least one part corresponding to the center part of the metal band and two parts corresponding to the edge parts on both sides. This is because it needs to be composed of individuals. If the auxiliary nozzle component is divided into about 11 to 7 parts, even if the width of the metal strip to be plated varies, the amount of coating in the width direction of the plate can be made uniform.
（実施例）
第１図は、気体噴射ノズルの実施例断面を、第２図は、
正面を示すもので、主ノズル構成部材１０は、スリット
状の噴射口８ａを形成するように配置しである。主ノズ
ル構Ｉ＆部材１０の後方は、隔壁１１に接続しであって
、この隔壁１１の両性側に外壁１２を設けである。隔壁
１１により形成される主ノズル圧力室１３と、隔！！１
１と外壁１２により形成される補助ノズル圧力室１４と
は、図示してないが、個々に圧力調！！装置が設けられ
でいる、主ノズル構成部材１０の両性面は、先端側を薄
くして斜面になっており、また、外壁１２の先端部外面
もこの斜面と同じ傾斜の斜面になっている。そして、こ
の外壁１２の先端部に基部内面が平坦になった補助ノズ
ル構成部材１５が載置され、噴射口８ａと平行なスリッ
ト状の噴射口８ｂを形成している。＠助ノズル構成部材
１５は、第２図のように、５分割されて、中央部のもの
が大きく、両側のものが小さくなっている。(Example) Figure 1 shows an example cross section of a gas injection nozzle, and Figure 2 shows a cross section of an example of a gas injection nozzle.
This figure shows the front view, and the main nozzle component 10 is arranged to form a slit-shaped injection port 8a. The rear of the main nozzle structure I & member 10 is connected to a partition wall 11, and outer walls 12 are provided on both sides of the partition wall 11. The main nozzle pressure chamber 13 formed by the partition wall 11 and the partition! ! 1
Although not shown, the pressure of the auxiliary nozzle pressure chamber 14 formed by the outer wall 1 and the outer wall 12 is adjusted individually. ! The amphoteric surface of the main nozzle component 10, on which the device is provided, is tapered on the tip side to form a slope, and the outer surface of the tip of the outer wall 12 is also a slope with the same slope. An auxiliary nozzle component 15 whose base inner surface is flat is placed at the tip of the outer wall 12, forming a slit-shaped injection port 8b parallel to the injection port 8a. @As shown in FIG. 2, the auxiliary nozzle component 15 is divided into five parts, with the central part being larger and the parts on both sides being smaller.
補助ノズル構成部材１５は、分割体ごとに制御棒１６が
固着され、その制御棒１６は、外壁１２に突設したスラ
イド台１７に嵌合され、進退で終るようになっていて、
補助ノズル構成部材１５の先端を主ノズル構成部材１０
の先端より最大４０−一＊で後退させることができる。In the auxiliary nozzle component 15, a control rod 16 is fixed to each divided body, and the control rod 16 is fitted into a slide base 17 protruding from the outer wall 12, and is configured to move forward and backward.
The tip of the auxiliary nozzle component 15 is connected to the main nozzle component 10.
It can be retreated by a maximum of 40-1* from the tip of the
次に、この気体噴射ノズルで補＃ノズルから気体を噴射
させない場合と噴射させた場合で銅帯の溶融アルミニウ
ムめっきの付着量制御を行つた場合の制御状態を示す。Next, we will show the control conditions when controlling the amount of molten aluminum plating on the copper strip with this gas injection nozzle when gas is not injected from the auxiliary nozzle and when gas is injected.
いずれの場合も、板厚０．８ｍｓ、板幅１０７！ｌ＋＋
＋ｓ＋の銅帯を使用し、かつ、めっき速度１００鴫／
ｍ ｉ ｎ ｓ鋼帯１とノズルとの間隔８ｍｍ、主ノズ
ルの圧力０、１２Ｋｇ／ａｍ”とした。In either case, the plate thickness is 0.8 ms and the plate width is 107! l++
+s+ copper strip is used, and the plating speed is 100 plating/
The distance between the steel strip 1 and the nozzle was 8 mm, and the main nozzle pressure was 0.12 kg/am''.
補助７′Ｘニルを使用する場合は、その圧力を０．００
４５Ｋｇ／ｅｉ＊”とし、補助ノズル構成部材は、両端
部のものの先端と主ノズル先端とを一致させ、中央部の
ものは主ノズルより１０論論後退させ、さらに、両エツ
ジ部と中央部との間に位置するものは、主ノズルより７
−鯵後退させた。When using an auxiliary 7'
45Kg/ei*'', and the tips of the auxiliary nozzle components at both ends are aligned with the tip of the main nozzle, and the one at the center is set back from the main nozzle, and further, both edges and the center are aligned. Those located between 7 and 7 from the main nozzle
-The horse mackerel was pushed back.
その結果、補助ノズルを使用しない場合は、銅帯が最大
４鍮−湾曲していて、付着量は、Ｐｔ５１表に示すよう
に、中央部とエツジ部と差がかなり大きかった。一方、
補助ノズルを使用した場合は、画部分の付着量差が少な
く、表裏とも±１５％以内であった。なお、エツジ部と
中央部との間の部位についても上記付着量の範囲内に制
御できた。As a result, when the auxiliary nozzle was not used, the copper strip had a maximum of 4 brass curves, and as shown in the Pt51 table, there was a considerable difference in the amount of adhesion between the central part and the edge part. on the other hand,
When the auxiliary nozzle was used, the difference in the amount of adhesion between the image areas was small and was within ±15% on both the front and back sides. It should be noted that the area between the edge portion and the center portion was also able to be controlled within the above range of adhesion amount.
第 １ 表
（発明の効果）
以上のように、本発明によれば、気体噴射ノズルの吹拭
位置での金属帯清面程度に拘わらず、エツジや他の部分
のオーバーコートを防止でき、幅方向全体の付着量を均
一にすることができる。また、蛍光Ｘ線などにより金属
帯幅方向の付着量分布を気体噴射ノズルによる吹拭直後
に測定しで、その結果により板幅方向における各補助ノ
ズル構成部材の進退距離を制御するようにすれば、付着
量分布の自動制御が可能になる。さらに、本発明の気体
噴射ノズルは、従来のノズルの外側に補助ノズル構成部
材を設けるのであるので、製作は容易で、安価である。Table 1 (Effects of the Invention) As described above, according to the present invention, overcoating of edges and other parts can be prevented regardless of the degree of cleaning of the metal strip at the wiping position of the gas injection nozzle. The amount of adhesion can be made uniform in all directions. In addition, it is possible to measure the coating amount distribution in the width direction of the metal strip using fluorescent X-rays or the like immediately after wiping with the gas injection nozzle, and use the results to control the advancing and retreating distance of each auxiliary nozzle component in the strip width direction. , it becomes possible to automatically control the coating amount distribution. Furthermore, the gas injection nozzle of the present invention is easy to manufacture and inexpensive because an auxiliary nozzle component is provided outside the conventional nozzle.
第１図は、気体噴射ノズルの実施例断面図であり、第２
図は、その正面図である。第３図は、銅帯のめり軽工程
を示す側面図であり、第４図は、従来の気体噴射ノズル
の肩面図である。
１・・・鋼帯、２・・・スナウト、３・・・ジンクロー
ル、４・・・めっき浴、５・・・トップロール、６・・
・気体噴射ノズル、７・・・圧力室、８用噴射口、９・
・・スナップロール、１０・・・主ノズル、１１・・・
隔壁、１２・・・外壁、１３・・・主ノズル圧力室、１
４・・・補助／、Ｉニル圧力室、１５・・・補助ノズル
構成部材、１６・・・制御棒、１７・・・スライド台、FIG. 1 is a sectional view of an embodiment of the gas injection nozzle, and FIG.
The figure is a front view thereof. FIG. 3 is a side view showing the copper strip rolling process, and FIG. 4 is a shoulder view of a conventional gas injection nozzle. 1... Steel strip, 2... Snout, 3... Zinc roll, 4... Plating bath, 5... Top roll, 6...
・Gas injection nozzle, 7... Pressure chamber, injection port for 8, 9.
...Snap roll, 10...Main nozzle, 11...
Partition wall, 12... Outer wall, 13... Main nozzle pressure chamber, 1
4... Auxiliary /, I-Nil pressure chamber, 15... Auxiliary nozzle component, 16... Control rod, 17... Slide stand,
Claims (3)
のノズルから気体を噴射して、過剰に付着しためっき金
属を除去するめっき付着量制御方法において、ノズルか
ら噴射した気体噴流の外側に少なくとも金属帯の幅方向
に３分割以上された他のノズルより気体を同方向から斜
めに噴射して、気体噴流の外側に気体の強制的流れを形
成するとともに、その強制的流れのノズル各分割位置で
の強さを制御することを特徴とする溶融めっきの付着量
制御方法。(1) In a plating coating amount control method in which gas is injected from a slit-shaped nozzle onto the metal strip immediately after it rises from the plating bath to remove excess plating metal, at least Gas is injected obliquely from the same direction from other nozzles divided into three or more in the width direction of the metal band to form a forced flow of gas outside the gas jet, and the nozzle of each divided position of the forced flow. A method for controlling the amount of adhesion of hot-dip plating, characterized by controlling the strength of the coating.
主ノズル構成部材両外側に構成補助ノズル構成部材を配
置して、該補助ノズル構成部材と主ノズル構成部材外面
とで主ノズル構成部材の噴射方向に対して鋭角に噴射す
るスリット状の噴射口を両噴射口が平行になるように形
成し、補助ノズル構成部材を幅方向に少なくとも３分割
以上にするとともに、その各分割部材を独立して噴射方
向に進退できる構造にしたことを特徴とする溶融めっき
の付着量制御用気体噴射ノズル。(2) An auxiliary nozzle component is arranged on both outer sides of a main nozzle component whose outer surface forming a slit-shaped injection port has an acute angle, and the auxiliary nozzle component and the outer surface of the main nozzle component form a main nozzle component. A slit-shaped injection port that injects at an acute angle to the injection direction is formed so that both injection ports are parallel to each other, and the auxiliary nozzle component is divided into at least three parts in the width direction, and each divided member is independent. A gas injection nozzle for controlling the amount of deposited hot-dip plating, characterized in that it has a structure that allows it to move forward and backward in the injection direction.
ズル構成部材先端より最大４０ｍｍにしたことを特徴と
する特許請求の範囲第２項に記載の溶融めっきの付着量
制御用気体噴射ノズル。(3) The gas injection nozzle for controlling the amount of hot-dip plating deposited according to claim 2, wherein the retreating distance of the auxiliary nozzle component is set to a maximum of 40 mm from the tip of the main nozzle component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2323489A JPH02205663A (en) | 1989-02-01 | 1989-02-01 | Method for controlling plating deposition of hot dip coating and gas injection nozzle to be used in this method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2323489A JPH02205663A (en) | 1989-02-01 | 1989-02-01 | Method for controlling plating deposition of hot dip coating and gas injection nozzle to be used in this method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02205663A true JPH02205663A (en) | 1990-08-15 |
Family
ID=12104924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2323489A Pending JPH02205663A (en) | 1989-02-01 | 1989-02-01 | Method for controlling plating deposition of hot dip coating and gas injection nozzle to be used in this method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02205663A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006328487A (en) * | 2005-05-27 | 2006-12-07 | Jfe Steel Kk | Manufacturing method of molten metal plated steel strip |
| JP2007031805A (en) * | 2005-07-29 | 2007-02-08 | Jfe Steel Kk | Manufacturing method of molten metal plated steel strip |
| JP2007177283A (en) * | 2005-12-28 | 2007-07-12 | Jfe Steel Kk | Gas wiping nozzle |
| JP2007197802A (en) * | 2006-01-30 | 2007-08-09 | Jfe Steel Kk | Method for producing molten metal-plated steel strip and gas wiping nozzle |
| JP2008150642A (en) * | 2006-12-14 | 2008-07-03 | Nippon Steel Corp | Method and apparatus for manufacturing hot-dip galvanized steel sheet |
| JP2010511789A (en) * | 2006-12-08 | 2010-04-15 | ポスコ | Multi-stage nozzle type gas wiping equipment |
| JP2011089211A (en) * | 2011-01-06 | 2011-05-06 | Jfe Steel Corp | Method for producing hot-dip metal-plated steel strip |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49109229A (en) * | 1973-02-21 | 1974-10-17 |
-
1989
- 1989-02-01 JP JP2323489A patent/JPH02205663A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49109229A (en) * | 1973-02-21 | 1974-10-17 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006328487A (en) * | 2005-05-27 | 2006-12-07 | Jfe Steel Kk | Manufacturing method of molten metal plated steel strip |
| JP2007031805A (en) * | 2005-07-29 | 2007-02-08 | Jfe Steel Kk | Manufacturing method of molten metal plated steel strip |
| JP2007177283A (en) * | 2005-12-28 | 2007-07-12 | Jfe Steel Kk | Gas wiping nozzle |
| JP2007197802A (en) * | 2006-01-30 | 2007-08-09 | Jfe Steel Kk | Method for producing molten metal-plated steel strip and gas wiping nozzle |
| JP2010511789A (en) * | 2006-12-08 | 2010-04-15 | ポスコ | Multi-stage nozzle type gas wiping equipment |
| US8113139B2 (en) | 2006-12-08 | 2012-02-14 | Posco | Gas wiping apparatus having adjustable gas guide |
| JP2008150642A (en) * | 2006-12-14 | 2008-07-03 | Nippon Steel Corp | Method and apparatus for manufacturing hot-dip galvanized steel sheet |
| JP2011089211A (en) * | 2011-01-06 | 2011-05-06 | Jfe Steel Corp | Method for producing hot-dip metal-plated steel strip |
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