JPH06212380A - Manufacture of support roll-less hot dip galvanized steel sheet - Google Patents
Manufacture of support roll-less hot dip galvanized steel sheetInfo
- Publication number
- JPH06212380A JPH06212380A JP781593A JP781593A JPH06212380A JP H06212380 A JPH06212380 A JP H06212380A JP 781593 A JP781593 A JP 781593A JP 781593 A JP781593 A JP 781593A JP H06212380 A JPH06212380 A JP H06212380A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- dip galvanized
- width direction
- galvanized steel
- support roll
- 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
Landscapes
- Coating With Molten Metal (AREA)
Abstract
(57)【要約】
【目的】 本発明は、サポートロールレス溶融亜鉛メッ
キ鋼板の製造方法に関するもので、特に溶融亜鉛メッキ
鋼板の外観不良を解消する事を目的とする。
【構成】 溶融亜鉛浴立上り部で、溶融亜鉛を直接巾方
向に鋼板に吹き付ける事により巾方向の鋼板の形状を矯
正し、且つドロスの持ち上がりを防ぐ事を特徴とする。
(57) [Summary] [Object] The present invention relates to a method for manufacturing a support rollless hot-dip galvanized steel sheet, and particularly an object thereof is to eliminate appearance defects of the hot-dip galvanized steel sheet. [Structure] At the rising portion of the molten zinc bath, the molten zinc is sprayed directly on the steel sheet in the width direction to correct the shape of the steel sheet in the width direction and prevent lifting of dross.
Description
【０００１】[0001]
【産業上の利用分野】本発明はサポートロールレス溶融
亜鉛メッキ鋼板の製造方法に関し、特に、サポートロー
ルレスにすることによる溶融亜鉛メッキ鋼板の外観不良
を解消する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 manufacturing a hot-dip galvanized steel sheet without support rolls, and more particularly to a method for eliminating a defective appearance of hot-dip galvanized steel sheet by making support rollless.
【０００２】[0002]
【従来の技術】従来、溶融亜鉛メッキ鋼板の製造装置に
おいては図３に示すように、溶融亜鉛浴３に鋼板１を連
続的に浸漬メッキを行う溶融亜鉛メッキ鋼板製造時、巾
方向のメッキ層の厚み均一化及びドロス付着防止を目的
としてポットロール２直上で２本のサポートロール７に
より鋼板をピッチしながら、ワイピングノズル６より例
えばＮ2 ガスによって鋼板のメッキ量を制御するもので
ある。2. Description of the Related Art Conventionally, in a hot-dip galvanized steel sheet manufacturing apparatus, as shown in FIG. 3, when a hot-dip galvanized steel sheet is manufactured by continuously dipping a steel sheet 1 in a hot-dip galvanized bath 3, a plating layer in the width direction is produced. For the purpose of making the thickness uniform and preventing the dross from adhering, the steel plate is pitched by the two support rolls 7 directly above the pot roll 2 and the plating amount of the steel plate is controlled by the wiping nozzle 6 by, for example, N 2 gas.
【０００３】[0003]
【発明が解決しようとする課題】上述したような、従来
技術においては、急激な通板速度の変化に対して、サポ
ートロールの回転とのアンマッチによるスリップ疵の発
生を生ずること及び溶融亜鉛浴中の浮遊ドロスのサポー
トロールへのかみ込みによるドロス押疵の発生のような
問題があった。SUMMARY OF THE INVENTION As described above, in the prior art, a slip flaw is generated due to an unmatch with the rotation of the support roll against a sudden change in the strip running speed, and in the molten zinc bath. There was a problem such as the occurrence of dross defects due to the floating dross being caught in the support roll.
【０００４】[0004]
【課題を解決するための手段】本発明は従来技術の課題
を有利に解決するものであって、その発明の要旨とする
ところは、溶融亜鉛浴立上り部において溶融亜鉛を直接
巾方向に鋼板へ吹付けることにより巾方向の鋼板の形状
を矯正し、かつドロスのもち上がりを防ぐサポートロー
ルレスの溶融亜鉛メッキ鋼板の製造方法である。The present invention advantageously solves the problems of the prior art, and the gist of the invention is that molten zinc is directly applied to the steel sheet in the width direction at the rising portion of the molten zinc bath. This is a method for manufacturing a hot-dip galvanized steel sheet without a support roll that corrects the shape of the steel sheet in the width direction by spraying and prevents dross from rising.
【０００５】以下図面に基づいて本発明について詳細に
説明する。図１は本発明による実施例を示す図である。
図１に示すように、鋼板１はメッキ鋼板として用いられ
るすべての鋼板である。また、ポットロール２は亜鉛浴
３内で方向転換を行うためのロールである。溶融亜鉛浴
３はＡｌ×０．０８％〜５．００％不可避元素としてＰ
ｂ，Ｓｂ，Ｆｅ，Ｃｄ，Ｍｇ残Ｚｎで構成された浴であ
り、浴温は４５０〜５００℃である。吐出用ポンプ４は
溶融亜鉛浴３をもち上げ鋼板に直接吹付けるためのポン
プである。亜鉛吐出口５は鋼板に直接吹付けるための吐
出口であり、巾方向に５〜２０個取りつけ巾方向移動可
能である。ワイピングノズル６はメッキ層厚を調整する
ためのＮ2 或いはＡｉｒ吐出ノズルである。サポートロ
ール７はポットロール２直上、溶融亜鉛浴内で形状矯正
及びドロスのもち上がり防止のためのピンチロールであ
る。The present invention will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing an embodiment according to the present invention.
As shown in FIG. 1, the steel plate 1 is any steel plate used as a plated steel plate. The pot roll 2 is a roll for changing the direction in the zinc bath 3. Molten zinc bath 3 contains Al x 0.08% to 5.00% P as an unavoidable element.
It is a bath composed of b, Sb, Fe, Cd, and Zn residual Mg, and the bath temperature is 450 to 500 ° C. The discharge pump 4 is a pump for lifting the molten zinc bath 3 and directly spraying it onto the steel plate. The zinc discharge port 5 is a discharge port for directly spraying onto the steel plate, and 5 to 20 zinc discharge ports can be mounted in the width direction and movable in the width direction. The wiping nozzle 6 is an N 2 or Air discharge nozzle for adjusting the plating layer thickness. The support roll 7 is a pinch roll just above the pot roll 2 in the molten zinc bath to correct the shape and prevent dross from rising.
【０００６】本発明は従来法と異なり亜鉛浴立上り部に
て溶融亜鉛３を吐出用ポンプ４でもち上げ、吐出口５よ
り直接巾方向に鋼板１へ吹きつけることにより巾方向の
鋼板の形状を矯正し、かつドロスのもち上がりを下方に
吹き落とす。巾方向の鋼板の形状・矯正に関しては、巾
方向、表裏の亜鉛の吐出量を調整することにより可能と
なり、板巾の変動時には板のエッジ検出機能を付加し亜
鉛吐出口を巾方向移動可能とすることで対処可能であ
る。メッキ層の厚さ調整は吐出口５直上のワイピングノ
ズル６にて行う。以上の内容によりサポートロールを用
いることなく、形状の矯正及びドロスのもち上がりを防
ぐことが可能であり、従来課題であったスリップ疵、ド
ロスのかみこみによる押疵のような外観不良が解消とな
る。In the present invention, unlike the conventional method, the molten zinc 3 is lifted up by the discharge pump 4 at the rising portion of the zinc bath, and blown directly from the discharge port 5 to the steel plate 1 in the width direction to form the shape of the steel plate in the width direction. Straighten and blow down the rising dross. The shape and straightening of the steel sheet in the width direction can be achieved by adjusting the discharge amount of zinc in the width direction and front and back.When the width of the plate changes, the edge detection function of the plate is added and the zinc discharge port can be moved in the width direction. It can be dealt with. The thickness of the plating layer is adjusted by the wiping nozzle 6 directly above the discharge port 5. With the above contents, it is possible to correct the shape and prevent the dross from rising without using a support roll, and it is possible to solve the conventional problems such as slip defects and appearance defects such as blemishes due to the biting of the dross. .
【０００７】その効果を図２（Ａ），（Ｂ）に示す。図
２（Ａ）において縦軸はスリップ、ドロス疵発生率
（％）、横軸は従来法、今日法の比較である。本発明に
より、従来５％程度の発生率が、０％と解消される。ま
た図２（Ｂ）で縦軸は、鋼板センターを基準とした時の
巾方向のメッキ層厚のばらつきを、横軸は巾方向の測定
位置を示した図であり、○印が従来法、●印が本発明で
のデータである。図２（Ｂ）でわかるように巾方向のメ
ッキ層厚のばらつきは従来法と比較しても差がない。The effect is shown in FIGS. 2 (A) and 2 (B). In FIG. 2A, the vertical axis shows slip and dross defect occurrence rate (%), and the horizontal axis shows comparison between the conventional method and the present method. According to the present invention, the conventional occurrence rate of about 5% is resolved to 0%. Further, in FIG. 2B, the vertical axis represents the variation of the plating layer thickness in the width direction with respect to the center of the steel sheet, and the horizontal axis represents the measurement position in the width direction. The mark ● is the data in the present invention. As can be seen from FIG. 2B, there is no difference in the variation of the plating layer thickness in the width direction compared with the conventional method.
【０００８】[0008]
【発明の効果】以上述べたように本発明によって、サポ
ートロールを用いることなく、従来と同レベルの巾方向
の形状矯正機能を有し、かつ従来からの課題である、ス
リップ疵、ドロスかみこみ疵の発生の解消が可能となっ
た。As described above, according to the present invention, without using a support roll, it has the same level of shape-correcting function in the width direction as the conventional one, and has the conventional problems of slip flaws and dross inclusions. It has become possible to eliminate the occurrence of defects.
【図１】本発明による実施例を示す図、FIG. 1 is a diagram showing an embodiment according to the present invention,
【図２】本発明と従来法との効果を示す図、FIG. 2 is a diagram showing an effect of the present invention and a conventional method,
【図３】従来の溶融亜鉛メッキ鋼板の製造装置を示す図
である。FIG. 3 is a diagram showing a conventional hot-dip galvanized steel sheet manufacturing apparatus.
１ 鋼板 ２ ポットロール ３ 溶融亜鉛浴 ４ 吐出用ポンプ ５ 亜鉛吐出口 ６ ワイピングノズル ７ サポートロール 1 Steel Plate 2 Pot Roll 3 Molten Zinc Bath 4 Pump for Discharge 5 Zinc Discharge Port 6 Wiping Nozzle 7 Support Roll
Claims (1)
巾方向に鋼板へ吹付けることにより、巾方向の鋼板の形
状を矯正し、かつドロスのもち上がりを防ぐことを特徴
とするサポートロールレスの溶融亜鉛メッキ鋼板の製造
方法。1. A support roll characterized in that, at the rising portion of a molten zinc bath, molten zinc is sprayed directly onto the steel sheet in the width direction to correct the shape of the steel sheet in the width direction and prevent dross from rising. Method for manufacturing hot-dip galvanized steel sheet of loess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP781593A JPH06212380A (en) | 1993-01-20 | 1993-01-20 | Manufacture of support roll-less hot dip galvanized steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP781593A JPH06212380A (en) | 1993-01-20 | 1993-01-20 | Manufacture of support roll-less hot dip galvanized steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06212380A true JPH06212380A (en) | 1994-08-02 |
Family
ID=11676097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP781593A Pending JPH06212380A (en) | 1993-01-20 | 1993-01-20 | Manufacture of support roll-less hot dip galvanized steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06212380A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7361385B2 (en) | 2001-03-15 | 2008-04-22 | Nkk Corporation | Method for manufacturing hot-dip plated metal strip and apparatus for manufacturing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5789469A (en) * | 1980-11-21 | 1982-06-03 | Nisshin Steel Co Ltd | Supporter for strip |
| JPH0215155A (en) * | 1988-07-04 | 1990-01-18 | Hitachi Ltd | Continuous melt plating equipment |
-
1993
- 1993-01-20 JP JP781593A patent/JPH06212380A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5789469A (en) * | 1980-11-21 | 1982-06-03 | Nisshin Steel Co Ltd | Supporter for strip |
| JPH0215155A (en) * | 1988-07-04 | 1990-01-18 | Hitachi Ltd | Continuous melt plating equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7361385B2 (en) | 2001-03-15 | 2008-04-22 | Nkk Corporation | Method for manufacturing hot-dip plated metal strip and apparatus for manufacturing the same |
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