JP2999100B2 - Molten metal holding device - Google Patents
Molten metal holding deviceInfo
- Publication number
- JP2999100B2 JP2999100B2 JP20816093A JP20816093A JP2999100B2 JP 2999100 B2 JP2999100 B2 JP 2999100B2 JP 20816093 A JP20816093 A JP 20816093A JP 20816093 A JP20816093 A JP 20816093A JP 2999100 B2 JP2999100 B2 JP 2999100B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- magnetic flux
- holding device
- force
- metal holding
- 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 - Fee Related
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- Crucibles And Fluidized-Bed Furnaces (AREA)
- Coating With Molten Metal (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、溶融金属メッキ装置
等に利用される溶融金属保持装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molten metal holding device used for a molten metal plating device and the like.
【０００２】[0002]
【従来の技術】図８及び図９は従来の溶融金属保持装置
を示す。鉄心１に巻回したコイル２に交流電源３から交
番電流を供給して、磁極４，５間に図の左右方向（図示
ｘ軸方向）に交番磁束９を生じさせる。磁極４，５間に
下部が交番磁束９の位置になるようにして耐熱性絶縁物
で作られた上下開口容器６が設けられている。上下開口
容器６内に入れられた溶融金属８に、交番磁束９により
図の前後方向（図示ｙ軸（手前側が正））方向に誘導電
流１０が生じ、交番磁束９と誘導電流１０との相互作用
（フレミングの左手の法則）により図の上方（図示ｚ軸
方向）に生じる押し上げ電磁力１１が溶融金属８を押し
上げる。これにより、溶融金属８は空中に保持される。
なお、溶融金属保持手段に関する先行技術として、特開
昭６３−１０９１４９号，特開平５−８６４４９及び特
開平５−８６４５０がある。2. Description of the Related Art FIGS. 8 and 9 show a conventional molten metal holding device. An alternating current is supplied from an AC power supply 3 to the coil 2 wound around the iron core 1 to generate an alternating magnetic flux 9 between the magnetic poles 4 and 5 in the left-right direction (x-axis direction in the figure). A vertically open container 6 made of a heat-resistant insulator is provided between the magnetic poles 4 and 5 so that the lower portion is located at the position of the alternating magnetic flux 9. An induced current 10 is generated in the molten metal 8 placed in the upper and lower opening container 6 by the alternating magnetic flux 9 in the front-rear direction of the drawing (the y-axis in the figure (the front side is positive)). By the action (Fleming's left-hand rule), the push-up electromagnetic force 11 generated above the figure (in the z-axis direction in the figure) pushes up the molten metal 8. Thereby, the molten metal 8 is held in the air.
As prior art relating to the molten metal holding means, there are JP-A-63-109149, JP-A-5-86449 and JP-A-5-86450.
【０００３】[0003]
【発明が解決しようとする課題】従来の溶融金属保持装
置は上記のようであるが、図８において、溶融金属８の
図の前後（ｙ軸）方向の両端部においては、誘導電流１
０がｙ軸方向（水平方向）からｚ軸方向（鉛直方向）上
向きに転流するため、押し上げ電磁力１１も上向き（ｚ
軸正）方向からｙ軸（水平）方向へ変わり、溶融金属８
を押し上げる力が不足する傾向が生じる。また、電流は
増減なく回流しなければならないので、溶融金属８の上
部では電流１０の方向は下部の電流１０の方向と逆方向
となり、図８に示すように、押し下げ力１４が生じるた
め（上部では磁束密度が小さいので押し下げ力１４は小
さいが）、溶融金属８の上面が変動して保持状態の不安
定が生じるというような課題があった。The conventional molten metal holding device is as described above. In FIG. 8, however, the induced current 1 is set at both ends of the molten metal 8 in the front and rear (y-axis) directions in the figure.
0 is commutated upward from the y-axis direction (horizontal direction) to the z-axis direction (vertical direction), so that the push-up electromagnetic force 11 is also upward (z
The direction changes from the positive (positive axis) direction to the y-axis (horizontal) direction.
There is a tendency for the power to push up to be insufficient. Further, since the current has to be circulated without increasing or decreasing, the direction of the current 10 in the upper part of the molten metal 8 is opposite to the direction of the lower current 10, and as shown in FIG. However, the pressing force 14 is small because the magnetic flux density is small), but there is a problem that the upper surface of the molten metal 8 fluctuates and the holding state becomes unstable.
【０００４】また、図９に示すように、例えば、溶融金
属８に流れる手前方向（ｙ軸正方向）の誘導電流１０に
よって、図の左から右方（ｘ軸正方向）への交番磁束９
が下方（ｚ軸負方向）へ湾曲させられる。このため、押
し上げ電磁力１１の方向が上方（ｚ軸正方向）から傾斜
して、押し上げ電磁力１１の上方への力が減少すると共
に、ｘ軸方向（水平方向）の分力である圧縮力１５が生
じ、溶融金属８が絞られて液滴となって流出し、溶融金
属８の保持が完全にはできないというような課題があっ
た。[0004] As shown in FIG. 9, for example, an alternating magnetic flux 9 from the left to the right (positive x-axis direction) of the figure due to an induced current 10 in the forward direction (positive y-axis direction) flowing through the molten metal 8.
Is curved downward (negative z-axis direction). Therefore, the direction of the push-up electromagnetic force 11 is inclined from above (the positive direction of the z-axis), so that the upward force of the push-up electromagnetic force 11 decreases, and the compressive force, which is a component force in the x-axis direction (the horizontal direction), is reduced. As a result, there is a problem that the molten metal 8 is squeezed and flows out as droplets, and the molten metal 8 cannot be completely held.
【０００５】この発明は上記のような課題を解消するた
めになされたもので、溶融金属を大きな押し上げ力をも
って安定して保持することができる溶融金属保持装置を
得ることを目的とする。[0005] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a molten metal holding device capable of holding a molten metal stably with a large lifting force.
【０００６】[0006]
【課題を解決するための手段】この発明に係る第１の溶
融金属保持装置は、溶融金属より電気伝導度の大きい良
導体側枠を、前記溶融金属の液面より上方において上部
を電気的に接続して、前記交番磁束方向の両側方に前記
溶融金属に接触させて設けたものである。また、この発
明に係る第２の溶融金属保持装置は、交番磁束を生成さ
せる磁極の中央部から上方の範囲において前記両磁極と
前記溶融金属との間に磁束を遮蔽させるように磁束遮蔽
板を設けたものである。In a first molten metal holding device according to the present invention, a good conductor side frame having higher electric conductivity than a molten metal is electrically connected to an upper portion above a liquid level of the molten metal. And it is provided in contact with the molten metal on both sides in the alternating magnetic flux direction. Further, the second molten metal holding device according to the present invention includes a magnetic flux shielding plate that shields magnetic flux between the magnetic poles and the molten metal in a range above a central portion of the magnetic pole that generates the alternating magnetic flux. It is provided.
【０００７】[0007]
【作用】この発明による第１の溶融金属保持装置の良導
体側枠は、溶融金属に生じる磁束方向に直角で水平方向
の電流が、両側部で上方に流れを変えようとするとき、
良導体側枠は溶融金属より電気伝導度が大きいので、こ
の電流を両側部で吸収して上方へ流し、溶融金属の液面
より上方の上部の接続回路で回流させる。したがって、
溶融金属内の両側部における電流の上方への方向転換が
少なくなり、両側部における押し上げ力の低下が防止さ
れる。また、溶融金属の上部に生じる反対方向の電流
は、良導体側枠の上部の接続回路に流れる電流により肩
代わりされるので、溶融金属を押し下げる力はほとんど
なくなる。これらの作用により安定した大きな保持力が
得られる。The good conductor side frame of the first molten metal holding device according to the present invention is adapted to be used when a horizontal current perpendicular to the direction of the magnetic flux generated in the molten metal changes its flow upward on both sides.
Since the good conductor side frame has higher electrical conductivity than the molten metal, this current is absorbed by both sides and flows upward, and is circulated in the upper connection circuit above the liquid level of the molten metal. Therefore,
The upward redirection of the current on both sides in the molten metal is reduced, and a decrease in the pushing force on both sides is prevented. In addition, the current in the opposite direction generated in the upper part of the molten metal is replaced by the current flowing in the connection circuit on the upper part of the good conductor side frame, so that there is almost no force for pushing down the molten metal. These actions provide a stable and large holding force.
【０００８】この発明による第２の溶融金属保持装置の
磁束遮蔽板は、磁極の中央部から上方の範囲において溶
融金属を通る磁束を遮蔽するので、磁束は溶融金属の下
部のみを通り、磁束の下方への湾曲が少なくなり、押し
上げ力の内側への傾斜が小さくなり、押し上げ力の低下
が防止されると共に、その水平方向の分力である溶融金
属を絞る圧縮力が小さくなり、保持力が安定する。The magnetic flux shielding plate of the second molten metal holding device according to the present invention shields the magnetic flux passing through the molten metal in a range above the center of the magnetic pole. The downward bending is reduced, the inward inclination of the push-up force is reduced, the drop in the push-up force is prevented, and the compressive force for squeezing the molten metal, which is the horizontal component, is reduced, and the holding force is reduced. Stabilize.
【０００９】[0009]
【実施例】以下、この発明の一実施例を図について説明
する。図１はこの発明に係る第１の溶融金属保持装置を
示し、（Ａ）は側面図、（Ｂ）は断面図である。図２は
図１に示す溶融金属保持装置をメッキ装置に応用したも
のの側面図である。図において、１は鉄心、２は鉄心１
に巻回されたコイル、３はコイル２に交流電流を供給す
る交流電源、４及び５は磁極である。６はセラミックス
などの耐熱性絶縁材質のもので作られた上下部が開口し
ている水平断面が長方形状で角形筒状の上下開口容器で
ある。上下開口容器６は下部が磁極４，５の間に位置す
るように設置されている。上下開口容器６の図１（Ａ）
において前後位置にある紙面に平行な両側面の各内側に
は、良導体側枠７が設けられている。良導体側枠７は、
図１（Ｂ）に示すように、上下開口容器６の上端部より
高い位置にある上端部で上端接続部７ｃにより連結接続
されている。良導体側枠７は、溶融金属８より電気伝導
率が高い材質であればよく、例えば銅などの電気の良導
体で作られている。上下開口容器６内には溶融金属８が
入れられて落下しないように後述のように電磁力により
保持される。上下開口容器６内の両側面に設けられた良
導体側枠７は注入された溶融金属８に当然接触する。な
お、溶融金属８としては、亜鉛，アルミニュウム，その
他の金属，それらの合金等が適用される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a first molten metal holding device according to the present invention, in which (A) is a side view and (B) is a sectional view. FIG. 2 is a side view of an application of the molten metal holding device shown in FIG. 1 to a plating device. In the figure, 1 is an iron core, 2 is an iron core 1
3 is an AC power supply for supplying an AC current to the coil 2, and 4 and 5 are magnetic poles. Reference numeral 6 denotes an upper and lower opening container which is made of a heat-resistant insulating material such as ceramics and has an open upper and lower portion and a rectangular cross section and a rectangular cylindrical shape. The upper and lower opening container 6 is installed so that the lower portion is located between the magnetic poles 4 and 5. FIG. 1 (A) of the vertically open container 6
, A good conductor side frame 7 is provided on each inner side of both sides parallel to the plane of the drawing at the front and rear positions. The good conductor side frame 7 is
As shown in FIG. 1B, the upper and lower opening containers 6 are connected to each other by an upper end connecting portion 7 c at an upper end located at a position higher than the upper end. The good conductor side frame 7 may be made of any material having a higher electric conductivity than the molten metal 8, and is made of a good electric conductor such as copper. The molten metal 8 is put in the upper and lower opening container 6 and is held by an electromagnetic force as described later so as not to drop. The good conductor side frames 7 provided on both sides of the upper and lower opening container 6 naturally come into contact with the injected molten metal 8. As the molten metal 8, zinc, aluminum, other metals, alloys thereof, and the like are applied.
【００１０】図１（Ａ）及び図２において、ｘ軸は右方
を正方向として左右方向に、ｙ軸は手前を正方向として
前後方向に、ｚ軸は上方を正方向として上下方向に座標
を設定する。図１（Ｂ）では、ｘ軸は向こう側、ｙ軸は
右方、ｚ軸は上方が正方向となる。交流電源３からコイ
ル２に交流電流を供給すれば磁極４，５間に交番磁場が
生じ、交番磁束９がｘ軸方向に生じ、誘導電流１０がｙ
軸方向に生じ、ローレンツの電磁力１１がフレミングの
左手の法則によりｚ軸方向に生じる。なお、交流電源３
から供給される交流電流の周波数は１乃至１０ｋＨz 程
度とするのがよい。In FIGS. 1A and 2, the x-axis is coordinated in the right-left direction with the right direction being the positive direction, the y-axis is coordinated in the front-rear direction with the near side as the positive direction, and the z-axis is coordinated in the up-down direction with the upside as the positive direction. Set. In FIG. 1B, the x-axis is on the far side, the y-axis is on the right, and the z-axis is on the upper side. When an alternating current is supplied from the AC power supply 3 to the coil 2, an alternating magnetic field is generated between the magnetic poles 4 and 5, an alternating magnetic flux 9 is generated in the x-axis direction, and the induced current 10 is changed to y.
It occurs in the axial direction, and Lorentz electromagnetic force 11 is generated in the z-axis direction according to Fleming's left-hand rule. The AC power supply 3
It is preferable that the frequency of the alternating current supplied from is set to about 1 to 10 kHz.
【００１１】ここで、例えば、図２に示すように、この
溶融金属保持装置を鋼板のメッキ装置として使用する場
合、上下が開口している上下開口容器６内に被メッキ鋼
板１２を上下の案内ドラム１３により案内させて上下方
向に通し、上下開口容器６内にメッキすべき溶融金属を
注入し、被メッキ鋼板１２を下から上へ連続移動させる
ことにより、被メッキ鋼板１２の両面にロール摺傷やド
ロス付着のない良好な仕上がりのメッキが得られる。Here, for example, as shown in FIG. 2, when this molten metal holding device is used as a steel plate plating device, the steel plate 12 to be plated is guided vertically into a vertically open container 6 which is open at the top and bottom. The molten metal to be plated is poured into the vertically opened container 6 by being guided by the drum 13 and vertically moved, and the steel plate 12 to be plated is continuously moved from bottom to top, so that the steel plate 12 is rolled on both sides. Good finish plating without scratches or dross adhesion can be obtained.
【００１２】図２において、磁極４，５間に生じている
交番磁束９を切るように被メッキ鋼板１２が下から上へ
移動するので、被メッキ鋼板１２の移動を妨げる方向
に、被メッキ鋼板１２内に交番渦電流が磁場内ではｙ軸
方向に誘起されて、その電流と交番磁束９との相互作用
によりローレンツの電磁力が生じる。この電磁力は、被
メッキ鋼板１２が下から上へ移動するので、その運動に
ブレーキをかけるように被メッキ鋼板１２を引き下げる
方向に働く。被メッキ鋼板１２にこの電流が発生して流
れると、被メッキ鋼板１２に接触している溶融金属８に
は、被メッキ鋼板１２に流れる電流の復路となるように
被メッキ鋼板１２に流れる電流の方向と反対の方向に流
れる電流が発生する。この溶融金属８内に発生する電流
は被メッキ鋼板１２内の電流と反対方向に流れるので、
溶融金属８に生じるローレンツの電磁力の方向は上方に
向けて働く。溶融金属８はこの押し上げ電磁力１１によ
り支持されて落下することなく上下開口容器６内に保持
される。In FIG. 2, the steel plate 12 to be plated moves upward from below so as to cut the alternating magnetic flux 9 generated between the magnetic poles 4 and 5, so that the steel plate to be plated 12 In the magnetic field, an alternating eddy current is induced in the y-axis direction in the magnetic field 12, and an interaction between the current and the alternating magnetic flux 9 generates Lorentz electromagnetic force. This electromagnetic force acts in the direction of pulling down the steel plate 12 so as to brake the movement of the steel plate 12 as it moves upward from below. When this current is generated and flows through the plated steel sheet 12, the molten metal 8 in contact with the plated steel sheet 12 causes the current flowing through the plated steel sheet 12 to return to the current flowing through the plated steel sheet 12. A current flows in the opposite direction. Since the current generated in the molten metal 8 flows in the opposite direction to the current in the steel plate 12 to be plated,
The direction of the Lorentz electromagnetic force generated in the molten metal 8 works upward. The molten metal 8 is held in the vertically open container 6 without being dropped and supported by the pushing electromagnetic force 11.
【００１３】図１及び図２に示すように、この溶融金属
保持装置においては、上下開口容器６の両側内面に良導
体側枠７が設けられ、良導体側枠７の上端は上端接続部
７ｃで接続されているので、磁極４，５の間の磁束９の
密度が大きい部分にある溶融金属８の下部に生じる磁束
９の方向に直角で水平方向（ｙ軸方向）の密度の大きい
誘導電流１０が、従来の溶融金属保持装置では両側部で
上方向に流れ方向を変えようとするとき、良導体側枠７
は溶融金属８より電気伝導度が大きいので、良導体側枠
７は、図１（Ｂ）に示すように、この電流１０を両側部
で良導体側枠７内へ吸収して良導体側枠７内で上方へ回
流させ、溶融金属８の液面より上方で接続した上端接続
部７ｃで回流させる。したがって、溶融金属８内の両側
部における電流１０の上方への方向転換が少なくなり、
両側部における電磁力１１の方向傾斜が防止される。す
なわち、電磁力１１の押し上げ力の低下及び電磁力１１
による圧縮力の発生が防止される。また、溶融金属８の
上部に生じる反対方向の電流は、良導体側枠７の上端部
で接続した上端接続部７ｃに流れる電流により肩代わり
されてなくなるので、溶融金属８を押し下げる力はなく
なる。これらの作用による安定した大きな保持力により
溶融金属８は保持される。As shown in FIGS. 1 and 2, in this molten metal holding device, good conductor side frames 7 are provided on the inner surfaces on both sides of the upper and lower opening containers 6, and the upper ends of the good conductor side frames 7 are connected by upper end connection portions 7c. Therefore, an induced current 10 having a large density in the horizontal direction (y-axis direction) at right angles to the direction of the magnetic flux 9 generated below the molten metal 8 in the portion where the density of the magnetic flux 9 between the magnetic poles 4 and 5 is large. In the conventional molten metal holding device, when the flow direction is to be changed in the upward direction on both sides, the good conductor side frame 7 is required.
As shown in FIG. 1B, the good conductor side frame 7 absorbs the current 10 into the good conductor side frame 7 on both sides thereof, and It is circulated upward, and circulated at the upper end connection portion 7c connected above the liquid level of the molten metal 8. Therefore, the upward turning of the current 10 on both sides in the molten metal 8 is reduced,
The directional inclination of the electromagnetic force 11 on both sides is prevented. That is, the lowering of the pushing force of the electromagnetic force 11 and the lowering of the electromagnetic force 11
This prevents generation of a compressive force. Further, the current in the opposite direction generated in the upper portion of the molten metal 8 is not replaced by the current flowing in the upper end connection portion 7c connected at the upper end portion of the good conductor side frame 7, so that there is no force to push down the molten metal 8. The molten metal 8 is held by a stable large holding force by these actions.
【００１４】次に、この発明に係る第２の溶融金属保持
装置について説明する。図３は第２の溶融金属保持装置
を示し、（Ａ）は側面図、（Ｂ）は中央部断面図、
（Ｃ）は磁束遮蔽板部の断面図である。図４は第２の溶
融金属保持装置の他の実施例の側面図である。図５は第
２の溶融金属保持装置をメッキ装置に応用したものの側
面図である。これらの図において、図１，図２と同様
に、１は鉄心、２はコイル、３は交流電源、４及び５は
磁極、６は上下開口容器、８は溶融金属、１２は被メッ
キ鋼板、１３は案内ドラムである。この第２の溶融金属
保持装置においては、磁極４，５の間にｘ軸方向に生成
する交番磁束９を横切る方向の上下開口容器６の側面の
内側又は外側に磁束遮蔽板１７を設けている。磁束遮蔽
板１７の下端辺の位置は、磁極４，５の中心、すなわち
交番磁束９の中心部より少し高い位置になるように設け
る。磁束遮蔽板１７の融点が溶融金属８の温度よりある
程度以上高いものである場合は、磁束遮蔽板１７を上下
開口容器６の内側に設けることにより、磁束遮蔽板１７
に生じる熱を溶融金属８に伝達して磁束遮蔽板１７を冷
却することができる。磁束遮蔽板１７の融点が溶融金属
８の温度付近以下である場合は、図４に示すように、磁
束遮蔽板１７を上下開口容器６の外側に設け、磁束遮蔽
板１７に水冷管１６を付設して冷却することもできる。Next, a second molten metal holding device according to the present invention will be described. 3A and 3B show a second molten metal holding device, where FIG. 3A is a side view, FIG.
(C) is a sectional view of the magnetic flux shielding plate portion. FIG. 4 is a side view of another embodiment of the second molten metal holding device. FIG. 5 is a side view of a case where the second molten metal holding device is applied to a plating device. 1 and 2, 1 is an iron core, 2 is a coil, 3 is an AC power supply, 4 and 5 are magnetic poles, 6 is a vertically open container, 8 is a molten metal, 12 is a steel plate to be plated, 13 is a guide drum. In the second molten metal holding device, a magnetic flux shielding plate 17 is provided between the magnetic poles 4 and 5 inside or outside the side surface of the vertically open container 6 in a direction crossing the alternating magnetic flux 9 generated in the x-axis direction. . The position of the lower end side of the magnetic flux shielding plate 17 is provided at a position slightly higher than the center of the magnetic poles 4 and 5, that is, the center of the alternating magnetic flux 9. When the melting point of the magnetic flux shielding plate 17 is higher than the temperature of the molten metal 8 by a certain degree or more, the magnetic flux shielding plate 17 is provided inside the upper and lower opening containers 6 so that the magnetic flux shielding plate 17 is provided.
Is transmitted to the molten metal 8 to cool the magnetic flux shielding plate 17. When the melting point of the magnetic flux shielding plate 17 is equal to or lower than the temperature of the molten metal 8, as shown in FIG. 4, the magnetic flux shielding plate 17 is provided outside the vertically open container 6, and the water cooling tube 16 is attached to the magnetic flux shielding plate 17. It can also be cooled.
【００１５】次に、図３，図４及び図５に示す第２の溶
融金属保持装置の動作について説明する。一般的な動作
については図１及び図２について説明したところと同様
であるので省略する。この第２の溶融金属保持装置にお
いては、磁極４，５間にｘ軸方向に生成する交番磁束９
の中央部から上方の範囲において両磁極４，５と溶融金
属８との間に磁束９を遮蔽する磁束遮蔽板１７が設けら
れているので、中央部から下部の交番磁束９のみが溶融
金属８を通り、磁束９の下方への湾曲が少なくなり、押
し上げ電磁力１１の内側への傾斜が小さくなり、その水
平方向の分力である溶融金属８を絞る圧縮力が小さくな
り、溶融金属８を上方へ押し上げて保持する力が安定す
る。Next, the operation of the second molten metal holding device shown in FIGS. 3, 4 and 5 will be described. The general operation is the same as that described with reference to FIGS. In the second molten metal holding device, an alternating magnetic flux 9 generated between the magnetic poles 4 and 5 in the x-axis direction is provided.
The magnetic flux shielding plate 17 for shielding the magnetic flux 9 is provided between the magnetic poles 4 and 5 and the molten metal 8 in a range above the central portion of the molten metal 8. , The downward bending of the magnetic flux 9 is reduced, the inward inclination of the pushing-up electromagnetic force 11 is reduced, and the compressive force for squeezing the molten metal 8 as a horizontal component is reduced. The force of pushing upward and holding is stabilized.
【００１６】次に、この発明による第１の溶融金属保持
装置の効果を示す図６について説明する。図６は、周波
数２ｋＨz でｘ軸方向の磁束密度が０．４Ｔの交番磁場
を生成させた場合、幅２０ｍｍ×長さ１８０ｍｍ×高さ
７０ｍｍの大きさを有するウッドメタル（テスト用低融
点金属）相当の溶融金属全体に作用するローレンツの電
磁力を計算した結果を示す。図６に示すように、従来の
導体側枠がないものでは、浮上力は４５Ｎ、圧縮力は４
３Ｎであるのに対して、この発明の第１の溶融金属保持
装置による導体側枠を設けたものでは、浮上力は６８Ｎ
（約１．５倍）に増加し、圧縮力は１８Ｎ（約０．４
倍）に低下する。したがって、浮上力の増加により大容
積のウッドメタル（溶融金属）の保持が可能になると共
に、圧縮力の低下により溶融金属液の安定性が向上す
る。Next, FIG. 6 showing the effect of the first molten metal holding device according to the present invention will be described. FIG. 6 shows a wood metal (low-melting point metal for testing) having a size of 20 mm in width × 180 mm in length × 70 mm in height when an alternating magnetic field having a magnetic flux density of 0.4 T in the x-axis direction at a frequency of 2 kHz is generated. 4 shows the results of calculating the electromagnetic force of Lorentz acting on the entire molten metal. As shown in FIG. 6, in the case where there is no conventional conductor side frame, the levitation force is 45N and the compression force is 4N.
3N, the levitation force is 68N in the case where the conductor side frame is provided by the first molten metal holding device of the present invention.
(About 1.5 times) and the compression force is 18N (about 0.4 times).
Times). Accordingly, a large volume of wood metal (molten metal) can be held by an increase in the floating force, and the stability of the molten metal liquid is improved by a decrease in the compressive force.
【００１７】次に、この発明による第２の溶融金属保持
装置の効果を示す図７について説明する。周波数２ｋＨ
z でｘ軸方向の磁束密度が０．４Ｔ、ウッドメタルの容
積が幅２０ｍｍ×長さ１８０ｍｍ×高さ７０ｍｍである
ことは図６と同様である。図７に示すように、従来の磁
束遮蔽板がないものでは、浮上力は４５Ｎ、圧縮力は４
３Ｎであるのに対して、この発明の第２の溶融金属保持
装置による磁束遮蔽板（厚さ２．５ｍｍ）を設けたもの
では、浮上力は４３Ｎ（約０．９６倍）とほとんど同一
であり、圧縮力は５Ｎ（約０．１２倍）に大幅に低下す
る。したがって、従来と同一の浮上力を保持しながら、
圧縮力が非常に低下するので、溶融金属液の安定性が向
上する。Next, FIG. 7 showing the effect of the second molten metal holding device according to the present invention will be described. Frequency 2kHz
As in FIG. 6, the magnetic flux density in the x-axis direction is 0.4 T in z and the volume of the wood metal is 20 mm in width × 180 mm in length × 70 mm in height. As shown in FIG. 7, when there is no conventional magnetic flux shielding plate, the levitation force is 45N and the compression force is 4N.
In contrast to 3N, the levitation force is almost the same as 43N (approximately 0.96 times) when the magnetic flux shielding plate (thickness: 2.5 mm) is provided by the second molten metal holding device of the present invention. Yes, the compression force drops significantly to 5N (about 0.12 times). Therefore, while maintaining the same levitation force as before,
Since the compression force is greatly reduced, the stability of the molten metal liquid is improved.
【００１８】なお、上記説明では、良導体側枠７を設け
たものと磁束遮蔽板１７を設けたものとを各別に説明し
たが、１個の溶融金属保持装置に良導体側枠７と磁束遮
蔽板１７を共に設けてもよい。この場合も相当の作用及
び効果が得られる。In the above description, the one provided with the good conductor side frame 7 and the one provided with the magnetic flux shielding plate 17 are separately described. 17 may be provided together. Also in this case, considerable functions and effects can be obtained.
【００１９】[0019]
【発明の効果】以上のように、この発明によれば、良導
体側枠により溶融金属内の両側部における電流の上向き
流れを吸収し、上部における反対方向の電流を肩代わり
したので、溶融金属を押し上げる力を増して浮上力が大
きくなり、圧縮力を減らして安定性が向上する。また、
磁束遮蔽板により磁束の下方への曲がりを防止したの
で、浮上力を維持し、圧縮力を減らして安定性が向上す
る。As described above, according to the present invention, the upward flow of current at both sides in the molten metal is absorbed by the good conductor side frame, and the current in the opposite direction at the upper portion is shouldered, so that the molten metal is pushed up. Increased force increases levitation force, reduces compression force and improves stability. Also,
Since the magnetic flux shielding plate prevents the magnetic flux from bending downward, the levitation force is maintained, the compression force is reduced, and the stability is improved.
【図１】この発明の第１の溶融金属保持装置を示し、
（Ａ）は側面図、（Ｂ）は断面図である。FIG. 1 shows a first molten metal holding device of the present invention,
(A) is a side view, (B) is a sectional view.
【図２】メッキ装置に応用したこの発明の第１の溶融金
属保持装置の側面図である。FIG. 2 is a side view of a first molten metal holding device of the present invention applied to a plating device.
【図３】この発明の第２の溶融金属保持装置を示し、
（Ａ）は側面図、（Ｂ）は中央部断面図、（Ｃ）は磁束
遮蔽板部の断面図である。FIG. 3 shows a second molten metal holding device of the present invention,
(A) is a side view, (B) is a cross-sectional view at the center, and (C) is a cross-sectional view of the magnetic flux shielding plate.
【図４】この発明の第２の溶融金属保持装置の他の実施
例の側面図である。FIG. 4 is a side view of another embodiment of the second molten metal holding device of the present invention.
【図５】メッキ装置に応用したこの発明の第２の溶融金
属保持装置の側面図である。FIG. 5 is a side view of a second molten metal holding device of the present invention applied to a plating device.
【図６】この発明の第１の溶融金属保持装置の効果を示
す線図である。FIG. 6 is a diagram showing the effect of the first molten metal holding device of the present invention.
【図７】この発明の第２の溶融金属保持装置の効果を示
す線図である。FIG. 7 is a diagram showing the effect of the second molten metal holding device of the present invention.
【図８】従来の溶融金属保持装置の側面図である。FIG. 8 is a side view of a conventional molten metal holding device.
【図９】従来の他の溶融金属保持装置の側面図である。FIG. 9 is a side view of another conventional molten metal holding device.
１：鉄心、 ２：コイル、 ３：交流電源、４，５：磁
極、６：上下開口容器、７：良導体側枠、 ７ｃ：上端
接続部、８：溶融金属、９：交番磁束、 １０：誘導電
流、 １１：押し上げ電磁力、１２：被メッキ鋼板、
１３：案内ドラム、１７：磁束遮蔽板。1: iron core, 2: coil, 3: AC power supply, 4, 5: magnetic pole, 6: vertically open container, 7: good conductor side frame, 7c: upper end connection, 8: molten metal, 9: alternating magnetic flux, 10: induction Current, 11: electromagnetic force up, 12: steel plate to be plated,
13: guide drum, 17: magnetic flux shielding plate.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宇ノ木 賢一 広島市西区観音新町四丁目６番22号 三 菱重工業株式会社広島製作所内 (72)発明者 三原 一正 広島市西区観音新町四丁目６番22号 三 菱重工業株式会社広島製作所内 (56)参考文献 特開 平５−86447（ＪＰ，Ａ) 特開 平４−99160（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C23C 2/00 - 2/40 F27B 14/06 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenichi Unoki 4-2-2 Kannonshinmachi, Nishi-ku, Hiroshima Sanritsu Heavy Industries, Ltd. Hiroshima Works (72) Inventor Kazumasa Mihara 4-chome Kannonshinmachi, Nishi-ku, Hiroshima-shi No. 6-22 Mitsubishi Heavy Industries, Ltd. Hiroshima Works (56) References JP-A-5-86447 (JP, A) JP-A-4-99160 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C23C 2/00-2/40 F27B 14/06
Claims (2)
に交番磁束を生じさせて電磁力により前記溶融金属を空
中に保持させる溶融金属保持装置において、前記溶融金
属より電気伝導度の大きい良導体側枠を、前記溶融金属
の液面より上方において上部を電気的に接続して、前記
交番磁束方向の両側方に前記溶融金属に接触させて設け
たことを特徴とする溶融金属保持装置。1. A molten metal holding device for generating an alternating magnetic flux in a horizontal direction at a lower end portion of a molten metal to be held and holding the molten metal in the air by an electromagnetic force, wherein a good conductor having higher electric conductivity than the molten metal. A molten metal holding device, wherein a side frame is electrically connected at an upper portion above a liquid level of the molten metal, and is provided in contact with the molten metal on both sides in the alternating magnetic flux direction.
に交番磁束を生成させて電磁力により前記溶融金属を空
中に保持させる溶融金属保持装置において、前記交番磁
束を生成させる磁極の中央部から上方の範囲において前
記両磁極と前記溶融金属との間に磁束を遮蔽させるよう
に磁束遮蔽板を設けたことを特徴とする溶融金属保持装
置。2. A molten metal holding device for generating an alternating magnetic flux at a lower end of a molten metal to be held in a horizontal direction and holding the molten metal in the air by an electromagnetic force, wherein a central portion of a magnetic pole for generating the alternating magnetic flux is provided. A magnetic flux shielding plate for shielding magnetic flux between the magnetic poles and the molten metal in a range above the molten metal holding device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20816093A JP2999100B2 (en) | 1993-08-02 | 1993-08-02 | Molten metal holding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20816093A JP2999100B2 (en) | 1993-08-02 | 1993-08-02 | Molten metal holding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0748660A JPH0748660A (en) | 1995-02-21 |
| JP2999100B2 true JP2999100B2 (en) | 2000-01-17 |
Family
ID=16551651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20816093A Expired - Fee Related JP2999100B2 (en) | 1993-08-02 | 1993-08-02 | Molten metal holding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2999100B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2210005C (en) * | 1995-11-10 | 2000-10-10 | Mitsubishi Jukogyo Kabushiki Kaisha | Method and apparatus for holding molten metal |
-
1993
- 1993-08-02 JP JP20816093A patent/JP2999100B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0748660A (en) | 1995-02-21 |
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