JP2821823B2 - Coating weight control method for hot dip galvanizing - Google Patents
Coating weight control method for hot dip galvanizingInfo
- Publication number
- JP2821823B2 JP2821823B2 JP22971791A JP22971791A JP2821823B2 JP 2821823 B2 JP2821823 B2 JP 2821823B2 JP 22971791 A JP22971791 A JP 22971791A JP 22971791 A JP22971791 A JP 22971791A JP 2821823 B2 JP2821823 B2 JP 2821823B2
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- coating weight
- gas
- dip galvanizing
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融亜鉛めっきのめっ
き付着量制御方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a coating weight of hot dip galvanizing.
【０００２】[0002]
【従来の技術】溶融亜鉛めっきのめっき付着量制御は、
一般にガスワイプにより、所定付着量に制御することが
行なわれている。このようなめっき付着量制御において
は、めっき鋼帯の振動発生により均一付着量に制御する
ことが困難となることがある。2. Description of the Related Art The coating weight control of hot-dip galvanizing is as follows.
Generally, control is performed to a predetermined amount by gas wipe. In such plating amount control, it may be difficult to control the coating amount to a uniform amount due to generation of vibration of the plated steel strip.
【０００３】[0003]
【発明が解決しようとする課題】しかして、めっき鋼帯
の振動を防止する方法として、例えばめっき付着量制御
位置の直上に静圧パツドを配置してめっき鋼帯の振動を
防止することが開示（特開昭６２−１８５６６７号公
報）されている。このような方法によれば、静圧パット
の位置でめっき鋼帯の振動はかなり防止できるが、めっ
き付着量制御位置では、確実な振動抑制が困難であり、
めっき付着量を均一制御することができず、品質を劣化
させ、又歩留も低下する等の欠点をともなうものであ
る。However, as a method of preventing the vibration of the plated steel strip, for example, disposing a static pressure pad immediately above the coating weight control position to prevent the vibration of the plated steel strip is disclosed. (JP-A-62-185667). According to such a method, the vibration of the plated steel strip can be considerably prevented at the position of the hydrostatic pad, but it is difficult to reliably suppress the vibration at the position where the coating amount is controlled,
It is not possible to uniformly control the amount of plating applied, resulting in defects such as deterioration in quality and reduction in yield.
【０００４】[0004]
【課題を解決するための手段】本発明は、めっき鋼帯全
巾に亘って水平方向にめっき付着量制御用気体を吹付
け、該吹付け気体の上部からめっき鋼帯全巾に亘って水
平〜下向きに気体を吹付け、該吹付気体と、上記めっき
付着量制御用吹付け気体間で静圧を発生せしめ、めっき
鋼帯の振動を抑制しつゝ、めっき付着量制御することを
特徴とする、溶融亜鉛めっきのめっき付着量制御方法に
関するものである。According to the present invention, a gas for controlling the amount of coating is sprayed in a horizontal direction over the entire width of a steel strip. A gas is blown downward, a static pressure is generated between the sprayed gas and the spray gas for controlling the coating weight, thereby suppressing the vibration of the coated steel strip and controlling the coating weight. And a method for controlling a coating weight of hot-dip galvanizing.
【０００５】[0005]
【作用】上記のごとく本発明においては、めっき付着量
制御位置で静圧に保持することによって、めっき鋼帯の
振動を抑制しつつ、めっき付着量を制御することから、
ほとんどめっき鋼帯の振動がない状態で付着量制御がで
き、均一な付着量に制御することができるものである。As described above, according to the present invention, by controlling the amount of plating while suppressing the vibration of the plated steel strip by maintaining the static pressure at the plating amount control position,
The coating amount can be controlled in a state where there is almost no vibration of the plated steel strip, and the coating amount can be controlled to be uniform.
【０００６】次に、図に従って本発明方法を詳細に説明
する。図面において、鋼帯１を前処理炉（図示せず）で
表面清浄等処理を施し、溶融亜鉛めっき浴２へ導きシン
クロール３を介して上部へ引き上げ、ダイス４、４ａに
より上記のごとくめっき鋼帯１の振動を抑制しつつ、め
っき付着量を制御するものである。Next, the method of the present invention will be described in detail with reference to the drawings. In the drawing, a steel strip 1 is subjected to a treatment such as surface cleaning in a pretreatment furnace (not shown), led to a hot-dip galvanizing bath 2, pulled up through a sink roll 3, and plated with a die 4, 4a as described above. It controls the amount of plating while suppressing the vibration of the band 1.
【０００７】ダイス４、４ａの下部ノズル５からのガス
吹付けによりめっき鋼帯１の余剰めっき金属を掻き取
り、所定付着量に制御する。上部ノズル６からのガス吹
付けにより、めっき鋼帯１と上下ノズル５、６に囲まれ
た静圧部位７で静圧が発生し、めっき付着量制御位置で
確実にめっき鋼帯１の振動を抑制し、従って付着量も均
一に制御できるものである。[0007] Excess plated metal of the plated steel strip 1 is scraped off by blowing gas from the lower nozzle 5 of the dies 4, 4a, and is controlled to a predetermined amount. By blowing gas from the upper nozzle 6, a static pressure is generated at the static pressure portion 7 surrounded by the plated steel strip 1 and the upper and lower nozzles 5, 6, and the vibration of the plated steel strip 1 is reliably ensured at the coating weight control position. Thus, the amount of adhesion can be controlled uniformly.
【０００８】しかしてダイス４、４ａの位置としては、
めっき金属の流動性が確保され、ガス圧により掻き取り
が容易にできる距離として下ノズル５と浴（４５０〜５
００℃）２表面間を２５０〜８００ｍｍでよい。The positions of the dies 4, 4a are as follows:
The distance between the lower nozzle 5 and the bath (450 to 5) is set so that the fluidity of the plated metal is ensured and the scraping can be easily performed by gas pressure.
(00 ° C.) The distance between the two surfaces may be 250 to 800 mm.
【０００９】上下ノズル５、６の吐出口間隙は０．６〜
１．５ｍｍ、吹付けガス圧は吐出圧で下ノズル０．５〜
２．０ｋｇ／ｃｍ2、上ノズル０．２〜１．０ｋｇ／ｃ
ｍ2、上下ノズル５、６の間隔は１０〜１００ｍｍ、下
ノズルのガス吹付け角度は、従来ガスワイプによるめっ
き付着量制御と同様でよく、ほゞ水平、上ノズルのガス
吹付け角度は、水平から下向（下向４５°位）の間、ノ
ズル５、６（ダイス）先端とめっき鋼帯１の間隔は４．
０〜２０ｍｍ、ガス体としては、窒素ガス、空気、燃焼
生成ガス、蒸気等で常温〜４００℃のものが適当であ
る。The gap between the discharge ports of the upper and lower nozzles 5, 6 is 0.6 to
1.5mm, spray gas pressure is lower than lower nozzle 0.5 ~
2.0 kg / cm 2 , upper nozzle 0.2-1.0 kg / c
m 2 , the interval between the upper and lower nozzles 5 and 6 is 10 to 100 mm, the gas spraying angle of the lower nozzle may be the same as the conventional method of controlling the amount of coating by gas wipe, and the gas spraying angle of the upper nozzle is approximately horizontal. The distance between the tips of the nozzles 5 and 6 (die) and the plated steel strip 1 is 4.
A gaseous substance having a temperature of normal temperature to 400 ° C., such as nitrogen gas, air, combustion product gas, steam, etc., is suitable as a gas body.
【００１０】このような条件でめっき付着量制御位置を
静圧とし、めっき鋼帯の振動を確実に抑制しつつ、薄付
着量から厚付着量まで正確に所定のめっき付着量に均一
に制御することができるものである。[0010] Under these conditions, the coating weight control position is set to a static pressure, and the vibration of the coated steel strip is reliably suppressed, and the predetermined coating weight is accurately and uniformly controlled from the thin coating quantity to the thick coating quantity. Is what you can do.
【００１１】[0011]
【実施例】次に本発明方法の実施例を比較例とともに表
１及び表２に挙げる。EXAMPLES Examples of the method of the present invention are listed in Tables 1 and 2 together with Comparative Examples.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【表２】 [Table 2]
【００１４】注１：めっき鋼帯は、巾１０００ｍｍ、板
厚０．７ｍｍ、 注２：シンクロールとトップロールの距離５０ｍ。 注３：めっき鋼帯の通板速度１２０ｍ／分で実施。 注４：比較例は、ノズル上部、２００ｍｍのところでめ
っき鋼帯両面に静圧を発生し、振動を抑制しつつ、めっ
きを施した。 注５：品質格落率は、１００ｔめっき鋼帯を製造し、め
っき鋼帯長手方向のめっきバラツキによる格落率であ
る。Note 1: Plated steel strip is 1000 mm wide and 0.7 mm thick. Note 2: Distance between sink roll and top roll is 50 m. Note 3: Conducted at a passing speed of 120 m / min. Note 4: In the comparative example, plating was performed while generating static pressure on both sides of the plated steel strip at 200 mm above the nozzle to suppress vibration. Note 5: The quality rejection rate is the rejection rate due to the variation in plating in the longitudinal direction of the plated steel strip after manufacturing a 100t plated steel strip.
【００１５】[0015]
【発明の効果】かくすることにより、めっき付着量のバ
ラツキが少なくなり、品質歩留を向上するとともに、品
質も向上することができる等の効果が得られる。As described above, the variation in the amount of plating can be reduced, the quality yield can be improved, and the quality can be improved.
【図１】本発明の一例を示す断面説明図である。FIG. 1 is an explanatory sectional view showing an example of the present invention.
１ 鋼帯 ２ 溶融亜鉛めっき浴 ３ シンクロール ４、４ａ ダイス ５ 下部ノズル ６ 上部ノズル ７ 静圧部位 DESCRIPTION OF SYMBOLS 1 Steel strip 2 Hot-dip galvanizing bath 3 Sink roll 4, 4a die 5 Lower nozzle 6 Upper nozzle 7 Static pressure part
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−205663（ＪＰ，Ａ) 特開 昭55−110766（ＪＰ，Ａ) 実開 昭64−45158（ＪＰ，Ｕ) 実開 昭62−141060（ＪＰ，Ｕ) 実開 昭61−159365（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) C23C 2/00 - 2/40──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-205663 (JP, A) JP-A-55-110766 (JP, A) JP-A-64-45158 (JP, U) JP-A-62 141060 (JP, U) Fully open Sho 61-159365 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) C23C 2/00-2/40
Claims (1)
き付着量制御用気体を吹付け、該吹付け気体の上部から
めっき鋼帯全巾に亘って水平〜下向きに気体を吹付け、
該吹付気体と、上記めっき付着量制御用吹付け気体間で
静圧を発生せしめ、めっき鋼帯の振動を抑制しつつ、め
っき付着量制御することを特徴とする、溶融亜鉛めっき
のめっき付着量制御方法。Claims: 1. A gas for controlling a coating weight is sprayed in a horizontal direction over the entire width of a steel strip, and a gas is blown from the upper part of the spraying gas horizontally to downward over the entire width of the steel strip.
Generating a static pressure between the spraying gas and the spray gas for controlling the coating weight of the coating to control the coating weight while suppressing the vibration of the coated steel strip; Control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22971791A JP2821823B2 (en) | 1991-08-16 | 1991-08-16 | Coating weight control method for hot dip galvanizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22971791A JP2821823B2 (en) | 1991-08-16 | 1991-08-16 | Coating weight control method for hot dip galvanizing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0551718A JPH0551718A (en) | 1993-03-02 |
| JP2821823B2 true JP2821823B2 (en) | 1998-11-05 |
Family
ID=16896603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22971791A Expired - Lifetime JP2821823B2 (en) | 1991-08-16 | 1991-08-16 | Coating weight control method for hot dip galvanizing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2821823B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2796139B1 (en) * | 1999-07-06 | 2001-11-09 | Stein Heurtey | METHOD AND DEVICE FOR SUPPRESSING THE VIBRATION OF STRIPS IN GAS BLOWING ZONES, ESPECIALLY COOLING ZONES |
| JP4987672B2 (en) * | 2007-11-09 | 2012-07-25 | 三菱日立製鉄機械株式会社 | Gas wiping device |
| JP5824905B2 (en) * | 2011-06-24 | 2015-12-02 | Ｊｆｅスチール株式会社 | Manufacturing method of molten metal plated steel strip |
-
1991
- 1991-08-16 JP JP22971791A patent/JP2821823B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0551718A (en) | 1993-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980804 |