JP3184790B2 - Device for removing excess plating solution from hot-dip metal plating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing a surplus plating solution by passing a hot-dip metal plating plate between air wiping nozzles for jetting air to face each other, and more particularly, to an apparatus for removing an excess plating solution. To prevent the occurrence of noise due to the collision of air, and to prevent the plating layer on the side end surface of the molten metal plating plate from being disturbed by the collision of air, The present invention relates to a technique for favorably forming a plating layer on a side end face of a hot-dip metal plated plate.

[0002]

2. Description of the Related Art Conventionally, an apparatus for removing an excess plating solution adhering to a metal plating plate which is pulled upward through a plating bath is disclosed in Japanese Patent Application Laid-Open No. 9-202954 shown in FIG. Edge plates 21 and 21 are disposed substantially in parallel with the molten metal plating plate 2 on both sides of the molten metal plating plate 2 that moves between the air wiping nozzles 16 and 16 that eject air. A band member 22 is attached to the side end surface 2a of the metal plating plate 2 at appropriate intervals and opposed to the side end surface 2a, and air flowing down along both surfaces of the edge plate 21 is applied to the lower end of the edge plate 21. A flow-down guide 23 is provided to guide obliquely outward and downward from the surface of the plate 21.

[0003]

In the above-mentioned conventional configuration, the air that collides with the edge plates 21 arranged on both sides of the hot-dip metal plating plate 2 is distributed along the edge plates 21 in the vertical direction and the like. The air that has flowed downward is guided by the flow-down guide member 23 to avoid violently colliding with the liquid surface of the plating bath 1, causing the liquid surface to undulate and causing droplets to scatter. It prevents adhesion and roughening of the plated surface.

However, as shown in FIG. 4C, the pressure air X flowing down along the guide surface 22s of the band material 22 is used.
And the pressure air Y flowing down directly along the surface of the edge plate 21 collides, and noise is generated at this location,
In addition, there is a problem that the pressurized air cannot be guided neatly and uncontrollable turbulence occurs, so that a plating layer cannot be formed satisfactorily on the side end portion of the molten metal plating plate 2.

The present invention has been made in view of such a problem, and prevents the air from which the excess plating solution has been removed from colliding, thereby suppressing the generation of noise due to the collision with the air, and Excessive plating of hot-dip metal plating that avoids disturbing the plating layer on the side end face of the hot-dip metal plating plate due to collision of air and can form a good plating layer on the side end surface of the hot-dip metal plating plate It is an object to provide a liquid removing device.

[0006]

According to the first aspect of the present invention, the hot-dip metal plating plate 2 is provided on both sides of the hot-dip metal plating plate 2 which moves between the air wiping nozzles 16 and 16 which jet air in opposition to each other. Parallel edge plates 21 and 2
The edge plate 21 is provided with a space between the side end surface 2a of the hot-dip metal plated plate 2 and the side end surface 2a.
a, the band member 22 is attached to the edge plate 2.
At the lower end of 1, there is provided a flow-down guide 23 for guiding air flowing down along both surfaces of the edge plate 21 from the surface of the edge plate 21 obliquely outward and downward. The lower the lower end of the strip 22, the lower the side end face 2 a of the molten metal plated plate 2
A curved guide portion 22a that curves away from the guide member 23, and an air passage D that is opened up and down between the lower end of the curved guide portion 22a and the downflow guide member 23. .

According to the second aspect of the present invention, the lower end of the curved guide portion 22a is substantially horizontal. (Function) In the invention of claim 1, the edge plate 2
The direction of the pressure air reaching the surface of the strip 22 along the surface 1 is changed by the curved guide portion 22a formed at the lower end of the strip 22, and the pressure air flowing down along the surface of the edge plate 21 is combined with the pressure air. Can be merged without collision, and can flow downward from the vertically opened air passage D formed between the lower end of the curved guide portion 22a and the flow-down guide member 23. It is possible to avoid the occurrence of air flow toward the side end surface 2a side of the hot-dip metal plating plate 2 due to collision, suppress generation of noise due to collision of pressure air, and collision of pressure air. Thereby, it is possible to avoid hindering favorable formation of the plating layer on the side end surface 2a of the hot-dip metal plated plate 2,
The air flow on the side end surface 2a side of the molten metal plating plate 2 can be made orderly, and the side end surface 2a
A good plating layer can be formed.

According to the second aspect of the present invention, the pressure air reaching the surface of the band material 22 along the surface of the edge plate 21 is:
The direction can be changed to a substantially horizontal direction by the curved guide portion 22a formed at the lower end portion of the strip 22, and the pressure air flowing down along the strip 22 moves away from the side end face 2a of the molten metal plating plate 2 in the direction. It is possible to guide the air flow on the side end surface 2a side of the hot-dip metal plating plate 2 more evenly, and to form a good plating layer on the side end surface 2a of the hot-dip metal plating plate 2.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a main part of the present invention, and FIG. 2 shows a schematic front view of the apparatus. A long metal plate is immersed in the plating bath 1, guided by the sink roll 7, and subjected to metal plating, and the molten metal plating plate 2 is pulled upward through the plating bath 1 to finish the drying process and the like. To be wound on a take-up reel. In this case, the plating solution adheres to the molten metal plated plate 2 pulled up from the plating bath 1 not only at the center but also at the side edges. The plating solution adhering to the surface of the hot-dip metal plating plate 2 is provided on both sides of the hot-dip metal plating plate 2, and is supplied from air wiping nozzles 16, 16 arranged in a line with respect to the plate surface. The plating solution can be removed and flowed down to the plating bath 1 by a so-called air knife by blowing out compressed air. By the way, the surplus plating solution a adhering to the side end of the hot-dip metal plating plate 2 is also removed, and its configuration will be described in detail below.

Fixed rails 8 are provided on both sides of the moving path of the hot-dip metal plating plate 2. Moving substrate 10
Are provided with upper and lower guide rolls 9. The guide rolls 9 are engaged with the fixed rails 8 so that the movable base 10 can move in the direction along the plate surface of the hot-dip metal plated plate 2. The upper edge of the fixed rail 8 is formed in an inverted V-shape to prevent the accumulation of dust on the upper edge.

The moving base 10 is provided with a removing means 3 for removing the surplus plating solution a and a follower 4 which follows the molten metal plating plate 2 to move out of a predetermined movement locus. A wire 11 is attached to the moving base 10, and the wire 11 is wound around a roller 12, and a weight 13 is attached to an end.
Is engaged. Thus, the gravity of the weight 13 is applied to the moving base 10 via the wire 11, and the moving base 1
0 is urged toward the molten metal plating plate 2 side, and the V-shaped roller 4a of the follower 4 contacts the side end surface 2a of the molten metal plating plate 2,
In this way, the V-shaped rollers 4a, 4a come into contact from both sides of the molten metal plating plate 2 so that the removing means 3, 3 can follow the movement of the molten metal plating plate 2 in the direction along the plate surface. is there.

The following structure is adapted to follow the fluctuation of the molten metal plating plate 2 in the thickness direction. That is, the shaft 6 is provided on the back side of the moving base 10 via the stay, and the shaft center of the shaft 6
The swing bar 5 is suspended from the shaft 6 so as to be swingable. As described above, the configuration for holding the shaft 6 on the movable base 10 can be variously changed in design. The removing means 3 is attached to the lower end of the swing bar 5, and a V-shaped roller 4a of the follower 4 is attached slightly above the removing means 3.

The oscillating bar 5 pivots around the shaft 6 to oscillate in the thickness direction of the hot-dip metal plating plate 2, and the removing means 3 and the V-shaped roller attached to the oscillating bar 5. 4a sufficiently follows the movement of the hot-dip metal plated plate 2 in the thickness direction. In such a case, the removing means 3 and the V-shaped roller 4
a is in close proximity and further enhances the followability.

The V-shaped roller 4a of the follower 4 has a structure shown in FIG.
As shown in (c), a pair of guide plates 4b, 4b are provided so that the end of the hot-dip metal plated plate 2 can be easily guided. Also, air is blown from the air path to the V-shaped roller 4a,
a is to be cooled. In FIG. 2, arrow A indicates air supply.

As shown in FIG. 1, the removing means 3 has an edge plate 21 which is held substantially parallel to the hot-dip metal plating plate 2, and the edge plate 21 has a side end surface 2 a of the hot-dip metal plating plate 2. At a suitable interval, a band member 22 facing the side end surface 2a is attached. Strip 22
Is bent in an arc shape. A curved guide portion 22a is formed at a lower end portion of the strip 22 so as to be curved away from the side end surface 2a of the molten metal plating plate 2 as it goes downward.
At a lower end of the edge plate 21, a flow-down guide 2 for guiding air flowing down along the edge plate 21 downward and obliquely outward away from the surface of the edge plate 21.
3 is provided. An air passage D opened vertically is formed between the lower end of the curved guide portion 22a and the downflow guide member 23. In this case, the lower end of the curved guide portion 22a is substantially horizontal. The flow-down guide member 23 holds the iron plate at approximately 90
And is welded to the edge plate 21. The flow-down guide 23 may use an angle material. Further, a concave arc surface may be formed on the surface inclined at about 45 ° of the flow-down guide member 23 so that the air is moved further away from the edge plate 21 so that the air collides with the liquid surface at a gentler angle. . Further, the inclination angle of the downflow guide member 23 can be changed.

The air colliding with the edge plate 21 and flowing down along the edge plate 21 is guided obliquely outward and downward by the flow-down guide 23, and the air violently collides with the liquid surface of the plating bath 1. In order to prevent the sound from being generated due to the collision of air.
This avoids collision of liquid droplets of the surplus plating solution removed together with the air with the liquid surface of the plating bath 1 and also prevents the liquid surface from being ruffled. This is to avoid roughening of the plated surface. Further, the vigorous collision of air with the liquid surface is avoided, and the oxidation of the plating surface is promoted, and dross is generated, and this floats on the liquid surface, thereby avoiding roughening of the plating surface. In this case, the air that has collided with the edge plate 21 is released at an angle of approximately 45 ° with respect to the vertical direction by the downflow guide device 23.
Good guidance is provided, and the above-mentioned operation is further ensured.

Further, the direction of the pressure air reaching the surface of the strip 22 along the surface of the edge plate 21 is changed by a curved guide portion 22 a formed at the lower end of the strip 22. The pressure air flowing downward along the surface merges and flows downward from the vertically open air passage D formed between the lower end of the curved guide portion 22a and the downstream guide member 23. Then, as in the conventional case, the pressurized air collides and the hot-dip
The air flow toward the side end surface 2a of the metal plate 2 can be avoided, the generation of noise due to the collision of the pressure air is suppressed, and the collision of the pressure air causes Obstructing the favorable formation of the plating layer on the side end surface 2a of the molten metal plating plate 2, the air flow on the side end surface 2a side of the molten metal plating plate 2 can be made orderly, and the side surface 2a of the molten metal plating plate 2 A good plating layer can be formed.

Moreover, the pressure air reaching the surface of the band 22 along the surface of the edge plate 21 can be changed in a substantially horizontal direction by a curved guide portion 22a formed at the lower end of the band 22. The pressure air flowing down along the strip 22 can be guided in a direction away from the side end surface 2a of the molten metal plating plate 2, and the flow of air on the side end surface 2a side of the molten metal plating plate 2 can be orderly. A good plating layer can be formed on the side end surface 2a of the plating plate 2.

By using the excess plating solution removing device 3 of the present invention, the following measurement results were obtained. A metal plate of 0.50 mm (thickness) x 755 mm (width) has a basis weight specification of Z12, an air ejection pressure from an air wiping nozzle of 0.93 kg / cm ² , and a line speed of feeding the metal plate at 135 m / min. When hot-dip galvanizing was performed, the acoustic measurement at a location about 6 m away from the sound source showed that it was 95 to 97 db.

0.60 mm (thickness) × 756 mm
The (weight) metal plate had a basis weight specification of Z08, an air ejection pressure from an air wiping nozzle of 1.40 kg / cm ² , and the other conditions were the same. In this case, the value was 120 db when the removing device 3 was removed. A metal plate of 0.60 mm (thickness) × 610 mm (width) was set to 100 db when the other conditions were the same. In this case, when removing device 3 is removed, 120 to 125
db.

From the above measurement results, it can be seen that the edge plate is effective for removing the excess plating solution from the narrow molten metal plating plate 2 and for the noise. By the way, the chromium plating is applied to the band material 22 so that the plating solution hardly adheres thereto, and the adhered material is easily removed. Further, the air ejection direction of the air wiping nozzle 16 was made substantially horizontal, and the position was made higher than in the past, so as to avoid the air from violently colliding with the liquid surface. Further, the mounting position of the removing device was set to be about 5 mm higher than that of the conventional one, and the interval between the hot-dip metal plating plate 2 and the strip 22 was widened to about 4 to 5 mm. Further, the air passage D opened up and down between the lower end of the curved guide portion 22a and the downflow guide member 23 was set to about 20 mm.

[0022]

According to the first aspect of the present invention, a curved guide portion is formed at the lower end portion of the strip so as to be curved away from the side end surface of the hot-dip metal plating plate as it goes downward, and the lower end portion of the curved guide portion flows down. An air passage that is open up and down is formed between the guide and the tool, so that the pressure air that reaches the surface of the strip along the edge plate is directed by the curved guide formed at the lower end of the strip. The pressure air flowing downward along the surface of the edge plate merges without collision, and flows downward from the vertically open air passage formed between the lower end of the curved guide portion and the downstream guide device. It can be made to flow down, and it can be avoided that the pressurized air collides and the airflow toward the side end face side of the hot-dip metal plating plate is caused as in the conventional case, and the noise caused by the pressurized air colliding can be avoided. It is possible to prevent the formation of the plating layer and to prevent the formation of the plating layer on the side end face of the hot-dip metal plated sheet from being hindered by the collision of the pressurized air. This is advantageous in that a good plating layer can be formed on the side end surface of the hot-dip metal plated plate.

According to the second aspect of the present invention, since the lower end of the curved guide portion is substantially horizontal, the pressure air reaching the surface of the band along the surface of the edge plate is formed at the lower end of the band. The direction can be changed in a substantially horizontal direction by the curved guide portion, and the pressure air flowing down along the strip can be guided in a direction away from the side end surface of the molten metal plating plate, and the side of the side end surface side of the molten metal plating plate can be guided. There is an advantage that the flow of air can be made more orderly and a good plating layer can be formed on the side end surface of the hot-dip metal plated plate.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, wherein (a) is a front view and (b) is a side view.

FIG. 2 is an overall schematic front view.

3A is a schematic front view, FIG. 3B is a schematic sectional view showing an air wiping nozzle, FIG. 3C is a schematic sectional view showing a V-shaped roller, and FIG. 3D is a surplus plating solution for a molten metal plating plate. (E) is a side cross-sectional view showing an operation before removing is performed.

4 (a) is a schematic front view, FIG. 4 (b) is a schematic side view, and FIG. 4 (c) is a schematic front view showing an operation.

[Explanation of symbols]

 2 Hot-dip metal plating plate 2a End face 16 Air wiping nozzle 21 Edge plate 22 Strip 22a Curved guide section 23 Downflow guide tool D Air passage opened up and down

Claims (2)

(57) [Claims] An edge plate is provided on both sides of a hot-dip metal plating plate that moves between air wiping nozzles that blow air to face each other, substantially in parallel with the hot-dip metal plate.
At the edge plate, a strip material is attached to the side end surface of the hot-dip metal plate at appropriate intervals and opposed to the side end surface.At the lower end of the edge plate, air flowing down along both surfaces of the edge plate is supplied to the edge plate. A removal device for removing excess plating solution provided with a flow-down guide tool for guiding diagonally outward and downward from the surface, so that the lower the lower end of the strip, the further away from the side end surface of the molten metal plating plate. A device for removing excess plating solution of molten metal plating, characterized by forming a curved guide portion which is curved in a curved manner, and forming an air passage opened up and down between a lower end of the curved guide portion and a downflow guide device. . 2. The apparatus according to claim 1, wherein a lower end portion of the curved guide portion is substantially horizontal.