KR101620413B1 - Apparatus for collecting plating solution and apparatus for electro plating having the same - Google Patents

Abstract

A plating solution recovery apparatus for recovering a residual plating solution on a steel sheet according to an embodiment of the present invention includes: a cylinder part having one end located on the plating solution and having a transfer space formed therein; A piston part installed in the transfer space and having a housing space therein to allow the plating solution to be transferred to the housing space through the transfer space via the up and down movement; And a driving unit connected to the piston unit to enable the piston unit to move up and down.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plating solution recovery apparatus and an electroplating apparatus having the plating solution recovery apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plating solution recovery apparatus and an electroplating apparatus having the plating solution recovery apparatus, and more particularly, to a plating solution recovery apparatus for effectively recovering a plating solution on a steel sheet and an electroplating apparatus having the same.

Steel sheets widely used for household appliances and automobile materials generally are plated with zinc-based metal and zinc-based metal alloy on the surface. By plating a zinc-based metal and a zinc-based metal alloy on the surface of the steel sheet, the corrosion resistance of the steel sheet is improved and the beautiful appearance of the surface of the steel sheet is maintained. Generally, in the electroplating apparatus, a zinc-based metal and a zinc-based metal alloy are plated on the surface of a steel sheet. The electroplating apparatus is generally divided into a carosel cell electroplating apparatus and a horizontal cell electroplating apparatus.

In a horizontal cell electroplating apparatus, a plating solution of a bath of sulfuric acid is generally used. The horizontal cell electroplating apparatus includes at least one pair of plating electrodes arranged in the vertical direction. The plating electrode is insoluble in length of 1500 to 2000 mm, and the current density is about 2000 A / dm 2. Plating electrodes work at a current of 50 KA per cell, allowing high current density operation. The steel plate moves through a space between a pair of plating electrodes arranged up and down, and the plating solution supplied through the solution nozzle is plated on the steel plate.

At least one pair of plating rolls are disposed on both sides of the plating electrode through which the steel sheet is introduced and discharged. In general, a pair of plating rolls is composed of an upper conductor roll and a lower backup roll. Conductor rolls supply the plating current (-) to the strip and are usually made of steel. The back-up roll is located at the bottom of the conductor roll and supports the steel sheet in close contact with the conductor roll at a pressure of about 4 to 5 kg / cm ² . The outer circumferential surface of the back-up roll is coated with a rubber material so that the steel sheet adheres to the conductor roll.

A positive (+) electrode is applied to the plating electrode and a negative (-) electrode is applied to the conductor roll. Current flows through the steel plate, and zinc ions dissolved in the plating solution receive electrons from the steel sheet and precipitate on the surface of the steel sheet The plating process proceeds. Also, since the steel sheet continuously passes through the space between the plating electrodes in accordance with the rotation of the conductor roll and the backup roll, the continuous plating product can be produced.

In order to improve the surface quality of the galvanized steel sheet, a minute amount of metal nano-coating is performed before the galvanizing and the coating solution used for the metal nano coating is nickel (Ni) solution. The steel sheet passes through the metal nano-coated horizontal cell, and the metal nano-coating is performed on the surface of the steel sheet. The steel sheet passing through the metal nano-coated horizontal cell is galvanized through the galvanized horizontal cell. The metal nano-coated horizontal cell is also composed of a pair of plating electrodes and a pair of plating rolls respectively disposed on the front and rear sides of the plating electrode.

Korean Patent Publication No. 10-2012-0063824 (published on June 18, 2012)

An object of the present invention is to provide a plating solution recovery apparatus for effectively recovering a plating solution on a steel sheet and an electroplating apparatus having the same.

Other objects of the present invention will become more apparent from the following detailed description and drawings.

A plating solution recovery apparatus for recovering a residual plating solution on a steel sheet according to an embodiment of the present invention includes: a cylinder part having one end located on the plating solution and having a transfer space formed therein; A piston part installed in the transfer space and having a housing space therein to allow the plating solution to be transferred to the housing space through the transfer space via the up and down movement; And a driving unit connected to the piston unit to enable the piston unit to move up and down.

Wherein the cylinder portion includes: a cylinder body having the transfer space opened at one end thereof; A cylinder cover coupled to an open end of the cylindrical body to form the transfer space, the cylinder cover having a first suction port disposed on the plating solution; And a first shut-off valve installed at the first suction port and opening and closing the first suction port according to the ascending and descending.

Wherein the piston portion includes: a piston body having the accommodation space therein, the one end of the piston body being opened; A piston cover coupled to an open end of the piston body to form the accommodation space, the piston cover having a second intake port; And a second shut-off valve installed at the second suction port and opening / closing the second suction port according to the ascending and descending.

In the plating solution recovery apparatus, when the piston portion rises, the first suction port is opened, the second suction port is closed, and the first suction port is closed and the second suction port is opened when the piston portion is lowered.

The first shut-off valve and the second shut-off valve may comprise a check ball valve.

The plating solution collecting apparatus may further include a first discharge port formed at one side of the cylinder body, a second discharge port formed at a side of the piston body, and a second discharge port communicating with the discharge port, The plating solution in the space can be discharged to the outside.

The plating solution recovery apparatus may further include: a discharge pipe connected to the first discharge port; And a pump connected to the discharge pipe.

The driving unit includes: a cylinder rod extending from the other end of the piston body and passing through the other end of the cylinder body; A driving roller connected to a front end of the cylinder rod; A cam capable of moving the drive roller in contact with the drive roller; And a driving motor connected to the cam to supply a lift driving force to the cam.

The plating solution collecting apparatus may further include a first guide member connected to the other end of the cylinder body and through which the cylinder rod is inserted; A fixing member extending from the first guide member along the upward direction of the piston; A second guide member connected to a distal end of the fixing member and through which the cylinder rod is inserted; And a guide plate coupled to the cylinder rod between the first guide member and the second guide member, wherein the upward movement range of the piston is limited by the first guide member, and the second guide member The downward movement range of the piston portion can be limited.

The plating solution recovery apparatus includes: a support member coupled to a distal end side of the rod; And an elastic body which is installed on the cylinder rod and has one end connected to the support member and the other end connected to the second guide member.

According to another aspect of the present invention, there is provided an electroplating apparatus comprising: a plating cell for introducing and discharging a steel sheet and applying a current to the steel sheet through a plating electrode provided therein; A backing roll supporting the conductor rolls and the conductor rolls disposed at the front and rear of the plating cell; And at least one plating solution recovery device installed at a rear side of the conductor roll disposed on the rear side of the plating cell and capable of recovering the residual solution on the steel plate.

Effects of the plating solution recovery apparatus and the electroplating apparatus having the plating solution recovery apparatus according to an embodiment of the present invention will be described as follows.

The plating solution recovery apparatus and the electroplating apparatus having the plating solution recovery apparatus according to an embodiment of the present invention can effectively recover the plating solution flowing to both edge portions of the upper surface of the steel sheet, .

The plating solution recovery apparatus and the electroplating apparatus having the plating solution recovery apparatus according to an embodiment of the present invention effectively recover and reuse the plating solution flowing to both side surfaces of the upper surface of the steel sheet, thereby reducing the number of times of preparing the plating solution.

The plating solution recovery apparatus and the electroplating apparatus having the plating solution recovery apparatus according to an embodiment of the present invention effectively recover the plating solution flowing to both sides of the upper surface of the steel sheet, thereby improving the quality uniformity in the width direction of the coated steel sheet.

1 is a schematic view of a horizontal cell electroplating apparatus.
FIG. 2 is a view schematically showing a plating solution flowing out to the upper surface of a steel sheet passed through a plating roll at the rear of a horizontal cell.
3 is a front view schematically showing a plating solution recovery apparatus according to an embodiment of the present invention.
4 is a partial cross-sectional view of a plating solution recovery apparatus according to an embodiment of the present invention, viewed from the front.
FIG. 5 is a cross-sectional view of a plating solution recovery apparatus according to an embodiment of the present invention, viewed from the front. FIG.
6 and 7 are side cross-sectional views illustrating lifting and lowering of a piston portion of a plating solution recovery apparatus according to an embodiment of the present invention.
8 is a view schematically showing an electroplating apparatus having a plating solution recovery apparatus according to an embodiment of the present invention.

The present invention relates to a plating solution recovery apparatus and an electroplating apparatus having the plating solution recovery apparatus, and embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description. Also, the connection referred to below should be construed to include not only when two components are directly connected but also indirectly connected through another medium.

1 is a schematic view of a horizontal cell electroplating apparatus.

As shown in Fig. 1, the horizontal cell electroplating apparatus 1 includes a horizontal cell 2 in which a steel sheet S is dipped. One or more pairs of plating rolls 5 are arranged on the front and rear sides of the horizontal cell 2 with respect to the traveling direction of the steel sheet S, respectively. The pair of plating rolls 5 are composed of a conductor roll 7 disposed on the upper side of the steel sheet S and a back-up roll 9 disposed on the lower side of the steel sheet S , The conductor rolls (7) and the backup rolls (9) rotate in opposite directions to transfer the steel sheet (S) in one direction.

FIG. 2 is a view schematically showing a plating solution flowing out to the upper surface of a steel sheet passed through a plating roll at the rear of a horizontal cell.

A pair of plating rolls 5 provided before and after the horizontal cell 2 feeds the steel sheet S in one direction and simultaneously squeezes the steel sheet S. [ An effect such that a dam is formed before and after the horizontal cell 2 occurs as the pair of plating rolls 5 squeegees the steel sheet S. As shown in FIG. 2, there is a problem that perfect squeezing does not occur at the edge portion of the upper surface of the steel sheet S that has passed through the roll of the conductor 7 and the backup roll 9. A phenomenon (A) occurs in which the plating solution flows out to the edge portion of the upper surface of the steel sheet S. Especially, when the plating process is performed on the backing sheet (S), the degree of leakage occurs more severely.

There arises a problem that the outflow of the plating solution A is mixed with the other solution to cause surface defects such as stains on the surface of the coated steel sheet S and unevenness of plating quality in the width direction of the coated steel sheet S. Also, since the consumption amount of the plating solution increases according to the plating solution outflow (A), there arises a problem that the plating solution needs to be replenished from time to time in the plating cell.

As the plating operation progresses, the plating solution in the plating cell 2 gradually becomes thinner in concentration. Therefore, the plating solution newly replenished to the plating cell 2 and the plating solution remaining in the plating cell 2 at the time of replenishing the plating solution have different concentrations from each other. Therefore, it is troublesome to periodically perform a make-up work to make the concentration of the plating solution appropriately adjusted in order to keep the concentration of the plating solution in the plating cell 2 constant.

In order to improve the surface quality of the galvanized steel sheet S, the steel sheet S is allowed to pass through the metal nano-coated horizontal cell 2 before galvanizing in the galvanized horizontal cell 2. In the metal nano-coated horizontal cell 2, the surface of the steel sheet S is coated with a metal nano coating solution such as a nickel (Ni) solution. Since nickel is an expensive raw material, the nickel solution outflow (A) causes an increase in manufacturing cost.

FIG. 3 is a front view schematically showing a plating solution recovery apparatus according to an embodiment of the present invention, FIG. 4 is a partial cross-sectional view of a plating solution recovery apparatus according to an embodiment of the present invention, Sectional view of a plating solution recovery apparatus according to an embodiment of the present invention.

3 to 5, the plating solution collecting apparatus 10 includes a cylinder part 100 located on the plating solution A having one end flowed out, a transfer space 116 formed inside the cylinder part 100 And a driving unit 300 for providing an elevating driving force to the piston unit 200. The driving unit 300 includes a driving unit 300,

The cylinder part 100 includes a cylinder body 110 having a transfer space 116 formed therein and an open end thereof and a cylinder cover 120 closing an open end of the cylinder body 110. One end of the cylinder cover 120 is positioned on the plating solution A on the upper surface of the steel sheet S and the first intake port 122 is formed on one side of the plating solution A. The outflow plating solution A is sucked into the transfer space 116 through the first suction port 122. A first shutoff valve capable of opening and closing the first suction port 122 is provided on the first suction port 122, and the first shutoff valve may be a check ball valve 125. At one side of the cylinder body 110, a first discharge port 130 communicating with the transfer space 116 is formed.

The piston 200 disposed in the transfer space 116 includes a piston body 210 having an accommodating space 216 formed therein and an open end thereof, a piston cover 220 closing an open end of the piston body 210 ). The piston cover 220 is closely attached to the inner surface of the cylinder body 110 to divide the transfer space 116 into a first transfer space 112 and a second transfer space 114. A second suction port 222 is formed in the piston cover 220 and the outflow plating solution A is sucked into the receiving space 216 through the second suction port 222. A second shutoff valve capable of opening and closing the second suction port 222 is provided on the second suction port 222. The second shutoff valve may be a check ball valve 225. A second outlet (230) communicating with the accommodation space (216) is formed at one side of the piston body (210).

The driving unit 300 includes a driving motor 310 for supplying a driving force, a cam 320 connected to the driving motor 310 for converting rotational motion into axial motion, and a driving roller 330 having one end contacting the cam 320 . The cylinder rod 340 extends from the closed end of the upper side of the piston body 210 and is arranged to penetrate the cylinder body 110. A driving roller 330 is disposed at the tip of the cylinder rod 340 and the piston 200 moves up and down in the transfer space 116 as the cam 320 connected to the driving motor 310 rotates. The piston body 210 is closed by the cylinder body 110 at the discharge position where the piston second discharge port 230 and the first discharge port 130 communicate with each other as the piston 200 moves up and down. As shown in FIG.

A first guide member 410 through which the cylinder rod 340 is inserted is connected to one end of the cylinder body 110 through which the cylinder rod 340 passes. The fixing member 400 extends from the first guide member 410 along the ascending direction of the piston 200 and has a second guide member 420 ). A guide plate 342 coupled to the cylinder rod 340 is disposed between the first guide member 410 and the second guide member 420. Since the upward movement of the guide plate 342 is restricted by the first guide member 410 when the piston 200 is lifted, the upward movement range of the piston 200 is limited. The downward movement of the guide plate 342 is restricted by the second guide member 420 when the piston unit 200 is lowered, so that the downward movement range of the piston unit 200 is limited. The first guide member 410, the second guide member 420, and the guide plate 342 limit the range of movement of the piston 200.

Although not shown in the drawing, the fixing member 400 is connected to the electroplating apparatus 1 to fix the cylinder body 110.

A support member 510 is coupled to the outer circumferential surface on the tip side of the cylinder rod 340. The elastic body 500 is installed on the cylinder rod 340 and has one end connected to the supporting member 510 and the other end connected to the fixing member 400. The elastic body 500 imparts an elastic force to the piston portion 300 to switch from the suction position to the discharge position.

A discharge pipe 600 is connected to the first discharge port 130 so that the outflow plating solution A contained in the receiving space 216 is discharged through the discharge pipe 600. Although not shown in the drawing, the discharge pipe 600 is connected to the plating solution tank to recover the outflow plating solution A into the plating solution tank. Although not shown in the drawing, a pump can be connected to the discharge pipe 600, and the outflow plating solution A is smoothly discharged to the plating solution tank by the pump.

6 and 7 are side cross-sectional views illustrating lifting and lowering of a piston portion of a plating solution recovery apparatus according to an embodiment of the present invention.

As shown in FIG. 6, when the piston 200 rises, the pressure inside the transfer space 116 is lowered to open the first check ball valve 125. The outflow plating solution A flows into the second transfer space 114 as the first check ball valve 125 is opened. As shown in FIG. 7, when the piston unit 200 is lowered, the pressure inside the transfer space 116 is increased, and the second check ball valve 225 is opened. As the second check ball valve 225 is opened, the outflow plating solution A that has flowed into the second transfer space 114 flows into the receiving space 216. As the piston part 200 repeatedly ascends and falls, the discharged plating solution A continuously flows into the receiving space 216. [

The plating solution A recovered from the plating solution recovery device 10 which has flowed out to the edge portion of the upper surface of the steel sheet S having passed through the plating roll 5 is recovered uniformly on the upper surface of the steel sheet S . Therefore, the coated steel sheet S has a uniform plating quality in the width direction, and prevents the plating quality from being deteriorated by unevenness or the like.

The outflow plating solution A flowing into the containing space 216 at the discharge position where the first outlet 130 and the second outlet 230 communicate with each other when the piston 200 is continuously raised and lowered repeatedly, Is discharged to the outside of the accommodation space (216) through the discharge pipe (600). The outlet pipe 600 is connected to the plating solution tank so that the outflow plating solution A is recovered into the plating solution tank.

The plating solution A which has flowed out to the edge portion of the upper surface of the steel sheet S having passed through the pair of plating rolls 5 is recovered to the plating solution tank through the discharge pipe 600, And is plated on the steel sheet S in the cell 2. The discharged plating solution (A) can be recovered and the plating operation can be performed again, thereby reducing the frequency of the plating solution replenishment, thereby reducing the cost. Also, the frequency of the makeup work for adjusting the concentration of the plating solution is reduced, and the workload of the worker is reduced.

8 is a view schematically showing an electroplating apparatus having a plating solution recovery apparatus according to an embodiment of the present invention.

As shown in FIG. 8, an electroplating apparatus according to an embodiment of the present invention includes a plating solution collecting apparatus 10 disposed behind a conductor roll 7 disposed on the rear side of the horizontal cell 2. Are arranged so that one end of the cylinder part (100) is positioned on the plating solution (A) flowing out to both edge parts of the upper surface of the steel sheet (S) passed through the plating roll (5). 3 to 8 illustrate that the plating solution recovery apparatus 10 is vertically disposed on the upper surface of the steel sheet S but the present invention is not limited thereto. Or may be arranged to be inclined with respect to the upper surface of the steel sheet S.

Since the electroplating apparatus according to an embodiment of the present invention includes the plating solution recovery apparatus 10, the plating solution A discharged to the rear side of the plating roll 5 is recovered to prevent deterioration of the quality of the coated steel sheet S. And the production cost of the coated steel sheet (S) can be reduced.

Although the present invention has been described in detail by way of examples, other forms of embodiments are possible. Therefore, the technical idea and scope of the claims set forth below are not limited to the embodiments.

S: steel plate A: effluent plating solution 1: horizontal cell electroplating device
2: Horizontal cell 5: Plating roll 7: Conductor roll
10: Plating solution recovery device 100: Cylinder part 110: Cylinder body
112: first transfer space 114: second transfer space 116: transfer space
120: cylinder cover 122: first intake port 125: first check ball valve
130: First outlet 200: Piston part 210: Piston body
216: accommodation space 220: piston cover 222: second intake port
225: second check ball valve 230: second outlet 300:
310: drive motor 320: cam 330: drive roller
340: cylinder rod 342: guide plate 400: fixing member
410: first guide member 420: second guide member 500: elastic member
510: support member 600: discharge pipe

Claims (11)

A plating solution recovery apparatus for recovering a residual plating solution on a steel sheet,
A cylinder part having one end located on the plating solution and having a transfer space formed therein;
A piston part installed in the transfer space and having a housing space therein to allow the plating solution to be transferred to the housing space through the transfer space via the up and down movement; And
And a driving unit connected to the piston unit to enable the piston unit to move up and down,
And one end of a cylinder portion located on the plating solution is fixedly arranged at a position spaced apart from the steel plate by a predetermined interval. The method according to claim 1,
Wherein,
A cylinder body having the transfer space opened at one end thereof;
A cylinder cover coupled to an open end of the cylindrical body to form the transfer space, the cylinder cover having a first suction port disposed on the plating solution; And
And a first shut-off valve installed at the first suction port and opening / closing the first suction port according to the ascending / descending. 3. The method of claim 2,
Wherein the piston portion includes:
A piston body in which the receiving space having one end opened is formed;
A piston cover coupled to an open end of the piston body to form the accommodation space, the piston cover having a second intake port; And
And a second shut-off valve installed at the second suction port for opening and closing the second suction port in accordance with the ascending and descending. The method of claim 3,
The plating solution recovery apparatus includes:
Wherein when the piston portion rises, the first suction port is opened, the second suction port is closed, and when the piston portion is lowered, the first suction port is closed and the second suction port is opened. The method of claim 3,
Wherein the first shut-off valve and the second shut-
And a check ball valve. The method of claim 3,
The plating solution recovery apparatus includes:
Wherein a first discharge port is formed on one side of the cylindrical body, a second discharge port is formed on one side of the piston body, and at the discharge position where the first discharge port and the second discharge port are communicated, The plating solution recovery device being capable of discharging the plating solution. The method according to claim 6,
The plating solution recovery apparatus includes:
A discharge pipe connected to the first discharge port; And
And a pump connected to the discharge pipe. The method of claim 3,
The driving unit includes:
A cylinder rod extending from the other end of the piston body and passing through the other end of the cylinder body;
A driving roller connected to a front end of the cylinder rod;
A cam capable of moving the drive roller in contact with the drive roller; And
And a driving motor connected to the cam to supply a lift driving force to the cam. 9. The method of claim 8,
The plating solution recovery apparatus includes:
A first guide member connected to the other end of the cylinder body and through which the cylinder rod is inserted;
A fixing member extending from the first guide member along the upward direction of the piston;
A second guide member connected to a distal end of the fixing member and through which the cylinder rod is inserted; And
And a guide plate coupled to the cylinder rod between the first guide member and the second guide member,
Wherein the upward movement range of the piston is limited by the first guide member and the downward movement range of the piston is restricted by the second guide member. 10. The method of claim 9,
The plating solution recovery apparatus includes:
A supporting member coupled to a distal end side of the rod; And
Further comprising an elastic body provided on the cylinder rod and having one end connected to the support member and the other end connected to the second guide member. A plating cell for introducing and discharging a steel sheet and applying current to the steel sheet through a plating electrode provided therein;
A backing roll supporting the conductor rolls and the conductor rolls disposed at the front and rear of the plating cell; And
And at least one plating solution recovery device installed at a rear side of the conductor roll disposed on the rear side of the plating cell and capable of recovering the residual solution on the steel plate,
The plating solution recovery apparatus includes:
An electroplating apparatus, which is the plating solution recovery apparatus according to any one of claims 1 to 9.

Images