Art
[1]
The present invention relates to a first cooling device, and a plating system plating steel plate cooling method plated steel sheet.
BACKGROUND
[2]
In the production process of the steel products it is carried out a continuous plating process, thereby producing a coated steel sheet according to the needs of the customer.
[3]
The continuous plating process, thereby cooling the plating solution adhered to the surface of the steel sheet in a molten state by the plating solution through the plating vessel is provided, such as zinc it is to produce a coated steel strip.
[4]
In other words, since the steel sheet passing through the plating bath has been over-plating solution adhered to the both sides, an air knife (air knife) the cooling of the after forming a plating layer of a suitable thickness, in the non-solidified zinc solution is at least about 460 ℃ using and it solidified using a device to form a coating layer having sufficient strength on the surface of the steel sheet according to the zoom would be to produce a coated steel strip.
[5]
By the way, the cooling for these plating solutions do not proceed rapidly can not be finer the crystal growth pattern of sequins pattern generated in the surface of the plating layer, thereby generating a problem in plating quality.
[6]
On the other hand, non-solidified plating solution so as to solidify the coating layer is an air cooler (Air cooler), etc. was cooled using a gas, is partially solidified coating layer was obtained a strength to a certain extent is carried out by cooling by a cooling nozzle for ejecting a cooling water It was.
[7]
Thus, if the reason for the plating solution is cooled using an air cooler for cooling the initial for the coated steel sheet, the spray droplets of cooling water in the unsolidified state coating layer, causing the recessed pit mark (pit mark) to the surface of the plating layer because.
[8]
That is, by giving to the cooling of the coating layer initially injecting the gas by cooling to prevent the occurrence of surface defects of the plated steel sheet.
[9]
Further, there is an air is partly solidified by the cooler plate layer secured a strength to a certain extent will be completely solidified by spraying cooling water from the cooling nozzle, wherein To the cooling water to cool the plated layer attached to the coating layer must transfer heat of the plating layer to, as only some of the sprayed cooling water is attached to the coating layer has a problem which decreases the cooling capability.
[10]
Thus, the method to utilize the cooling gas into the plating layer solidification initially slow the cooling rate than the cooling method utilizing the cooling water, even in the case of cooling by injection of cooling water decreased ability cooling because not all the cooling water is to adhere to the coating layer thereby, it becomes a problem that the zinc plated layer of a solidified pattern of spangles by slow cooling overgrown occurs.
[11]
That is, when the sequins pattern shown in 10 (a) forming a coated steel surface hatching diagram of plated products, as well as the tteurige down the glossiness can not be a high-end applications such as exterior materials for automobile outer plate member or appliances.
[12]
Further, enough could not be cooled if the plating layer is in contact with the transfer roll, some of the plating solution is attached to a roll on, which results is that the surface of the steel sheet Stripe of pick-up marks (pick-up mark) in the width direction of the generation of surface flaws there is also the problem that this factor.
[13]
In addition, according to the low speed cooling of the coating layer, in the plants for the continuous production of the coated steel strip to be secured and sufficient cooling time of the coated steel strip, so that there are limitations that increasing the size of the equipment according to the longer the length of the cooling line.
Detailed Description of the Invention
SUMMARY
[14]
As the object of the present invention to increase the cooling rate of the coated layer on the steel sheet, is to improve the quality of the plated steel sheet as well as to provide a coated steel sheet of claim 1, the cooling unit, the plating facility, and plated steel plate cooling method of preventing the increase in size of equipment .
Problem solving means
[15]
Plated steel sheet a first cooling device in accordance with one embodiment of the present invention is disposed on at least one side of the water jet unit, the cooling water spraying unit for spraying cooling water to the coated steel strip, comprising a charging unit for charging the cooling water, the cooling water spray unit may be characterized in that installed such that the cooling water is injected in a state of being charged by the charging unit.
[16]
Further, the cooling water spraying unit of the coated steel strip first cooling device in accordance with one embodiment of the present invention, the first container portion for receiving a coolant, is connected to the first container part, flow passage and the in which the cooling water moving is connected to the flow path portion receives the coolant delivered from the first storage portion, it may include a nozzle for injecting the cooling water into the coated steel strip.
[17]
In addition, the first container portion of the coated steel strip first cooling device in accordance with one embodiment of the present invention can be characterized in that the grounded.
[18]
Further, it characterized in that the charging unit of the coated steel strip first cooling device in accordance with one embodiment of the present invention, is applied to the electrostatic charge which comprises an electrode that forms an electric field and arranged so as to intersect with the electrode portion wherein the flow path portion can do.
[19]
In addition, the electrode of the plated steel sheet a first cooling device in accordance with one embodiment of the invention section, may be characterized in that disposed in the flow path portion the upper and lower sides.
[20]
Also, the charging unit of the coated steel strip first cooling device in accordance with one embodiment of the present invention, further comprising an electrode support for supporting the electrode portion, the electrode support portion, the first container portion first body is formed that in front of the unit, which is installed to or otherwise combined with the first body unit and the integral it may be characterized.
[21]
In addition, the nozzle portion of the coated steel strip first cooling device in accordance with one embodiment of the present invention can be characterized in that the cooling water sprayed in the form of droplets.
[22]
In addition, the nozzle portion of the coated steel strip first cooling device in accordance with one embodiment of the present invention can be characterized in that the dog is provided with a plurality in the transverse direction of the coated steel strip.
[23]
Further, the cooling water spraying unit of the coated steel strip first cooling device in accordance with one embodiment of the present invention, is in communication with the nozzle unit, it may include injection pressure agent study to provide a gas so as to give an injection pressure in the cooling water .
[24]
Further, the nozzle is provided on the periphery portion of the coated steel strip first cooling device in accordance with one embodiment of the present invention may further include the cooling water injected first gas curtain portion for guiding to said plate.
[25]
[26]
Plating system according to another embodiment of the present invention may include the coated steel strip first cooling device provided on a moving path of the coated steel strip exits the plating bath and the plating bath.
[27]
Further, the plating apparatus according to another embodiment of the present invention may include coated steel sheets a second cooling device provided on the steel strip traveling path between the plating tank and the first cooling device.
[28]
Also, the second cooling unit in the plating apparatus according to another embodiment of the present invention can be characterized in that to form the cooling water into a mist sprayed on the steel plate with gas by ultrasonic vibration.
[29]
Also, the second cooling unit in the plating apparatus according to another embodiment of the present invention, in accordance with the gas to form a gas injection unit, a cooling water for injecting the gas into the steel sheet as a mist that is sprayed from the gas ejecting unit to the plate It may include a mist and the filter unit is provided on the moving path of the gas injected from the gas injection unit is formed in the ultrasound unit and the ultrasonic unit for injection.
[30]
In addition, the filter unit of the plating facility according to an embodiment of the present invention can be characterized in that for adjusting the size of the mist particles to be sprayed on the steel sheet.
[31]
In addition, the filter unit of the plating facility according to an embodiment of the present invention, there is provided in the filter frame portion and the portion wherein the filter frame is provided on the flow path of the mist formed in the ultrasound unit, the flow path of some of the mist particles It is provided to change the remaining mist particles may include a control panel that is provided with the collision by the movement inertial force.
[32]
Furthermore, the adjustment plate of the plating facility according to an embodiment of the present invention comprises: a plurality is provided with a dog in the filter frame portion at a predetermined interval, it can be characterized in that the obliquely provided in the path through which the mist particles.
[33]
[34]
The cooling step, and the plated steel plate cooling method according to an embodiment of the present invention and the plating process, coat the coating solution on the steel sheet, land on the steel sheet comprises a wiping step, a cooling step of adjusting the thickness of the plating solution It is, but cooling by spraying a cooling water on the steel plate, the cooling water may be characterized in that the injection into the charged state.
[35]
Further, the cooling step of the coated steel plate cooling method according to an embodiment of the present invention, with respect to the cooled steel sheet in the line cooling step and the pre-cooling step of performing cooling with respect to the plating solution coated steel sheet the same by the charging after cooling by spraying the cooling water is given polarity may comprise the step of cooling.
Effects of the Invention
[36]
As coated steel sheet of claim 1, the cooling unit, the plating facility, and plated steel plate cooling method of the present invention is increasing the cooling rate of the coated layer on the steel sheet, it is to improve the quality of the plated steel sheet as well, there is an advantage to avoid the increase in size of equipment .
[37]
In addition, when the cooling by the gas to cool the initial to a steel sheet a plating solution is coated, by spraying the fine moisture particles are formed by using an ultrasonic together, the cooling performance while preventing the pit mark puddles on the unsolidified coating layer formed it is possible to improve.
[38]
In addition, when the coated coating solution to the outer surface to be cooling water is injected for cooling for the part solidified steel sheet, so, because while charge injecting cooling water, to improve the charging efficiency of the injected cooling water, the cooling water adhering to the part solidified plating layer it is possible to increase the ratio, it is possible to improve the cooling efficiency of the injection of cooling water.
Brief Description of the Drawings
[39]
1 is a front view showing the plating system of the present invention.
[40]
2 is a front view showing a plated steel sheet a first cooling unit in the plating system of the invention.
[41]
Figure 3 is a perspective view showing a plated steel sheet a first cooling unit in the plating system of the invention.
[42]
Figure 4 is a front view showing an embodiment of the present invention comprises plating system coated steel sheet of claim 1, Television cooled first gas curtain portion of.
[43]
5 is a front view showing a plated steel sheet a second cooling unit in the plating system of the invention.
[44]
Figure 6 is a coated steel strip in a second cooling device of the present invention, the plating equipment front view of the temperature control of the gas injection unit showing the additional embodiment provided with the exterior of the gas supply.
[45]
Figure 7 is a perspective view of the coated steel strip in the plating facility second cooling device of the present invention.
[46]
8 is a front view showing an embodiment comprising the second body unit is a second gas curtain portion in the coated steel sheet of claim 2, the cooling device of the present invention the plating equipment.
[47]
9 is a front view showing an operating state of the filter unit on the plated steel sheet a second cooling device of the present invention the plating equipment.
[48]
Figure 10 is a photograph showing a pattern finer spangles the state at the time of cooling the coating layer by the present invention, the spangle pattern coarsening state and at the time of cooling the coating layer by the prior art.
Best Mode for Carrying Out the Invention
[49]
Hereinafter, with reference to the drawings will be described in a specific embodiment of the present invention in detail. However, the spirit of the invention nor be limited to the embodiments set forth for example, by the person skilled in the art to understand the scope of the invention is added to the other components within the scope of the same idea, change, deletion, etc., deterioration of the other invention or the invention would be able to readily suggest other embodiments be included within the scope of the idea, this will also be included in the inventive idea scope herein.
[50]
In addition, the same components, functions in the scope of the same idea appears in each embodiment will be explained with reference to the figures the same reference numerals.
[51]
[52]
The present invention by increasing the cooling rate of the coated layer on the steel sheet (S), is to improve the quality of the coated steel strip (S) as well, it is possible to prevent an increase in size of the facility.
[53]
[54]
Referring to the drawings, Figure 2 is a front view showing the coated steel sheet of claim 1, the cooling device 200 of the present invention, with reference purpose, the coated steel strip according to an embodiment of the invention the first cooling device 200 and cooling water spraying unit for spraying cooling water to the coated steel strip (S) 220, is disposed on at least one side of the water jet unit 220, includes a charging unit 230 for charging the cooling water, the cooling water spraying unit 220, may be characterized in that the cooling water is installed such that the injection in a state of being charged by the charging unit 230.
[55]
Thus, the coated steel strip of the present invention, the first cooling device 200 may be injected from the charged state to the cooling water.
[56]
In particular, the water jet unit 220 by being provided at one side of the charging unit 230, since the injection in the cooling water is charged state, as the cooling water injection charging in the same polarity to increase the charging efficiency of the cooling water because increasing the adhesion rate of the cooling water of the plating layer on the steel sheet (S) is possible to increase the cooling efficiency.
[57]
[58]
Further, with the cooling water spray unit 220, a first storage portion 222, the first storage portion 222 for receiving the cooling water of the coated steel strip of claim 1, the cooling unit 200 according to an embodiment of the present invention connection and the nozzle portion (223 a is connected to the flow passage 221 and the passage portions 221 in which the cooling water moving receive deliver cooling water in the first storage portion 222, injecting the cooling water into the coated steel strip ) may include.
[59]
Here, in the flow path unit 221 of the first storage portion 222, the cooling water is injected there is the responsible for forwarding to the nozzle unit 223, wherein a portion of the flow path unit 221 is the charging unit ( 230), the can being provided with through-the front of the injection direction than the charging unit 230, charging by the cooling water injected in the same injection electrode. The detailed description will be described later.
[60]
And, wherein as configuration 1 the vessel 222 is provided with a cooling water to be injected, in order to receive passing cooling water (W) from the outside and be connected to the supply pipe, a part of the cooling water stored it may be discharged through the drain pipe . However, most of the stored coolant is passed to the nozzle unit 223 through the flow passage unit 221 is to be injected into the steel sheet (S).
[61]
The first storage portion 222 may be grounded to the ground (ground), being composed of a material of the conductor, or accepting negative charge on the ground in Daejeon of the cooling water, to perform functions such as to discharge the negative charge It can be so.
[62]
That is, the first storage portion 222 of the coated steel strip first cooling device 200 according to one embodiment of the present invention can be characterized in that the grounded.
[63]
In particular, the first container portion 222 of the internal cooling water will be able to avoid the problem that, since the charging with all of the same polarity by the electrode unit 232 which will be described later, the charging polarity offset in the middle of the injection of the cooling water .
[64]
The nozzle unit 223 is responsible for injecting the cooling water passing through the flow passage 221 in the first storage portion 222, a steel sheet (S).
[65]
Here, the nozzle unit 223 may be configured increase the spraying speed of the cooling water to be injected by having a hole into which gradually decrease the jet flow path of the cooling water to be injected shape.
[66]
In addition, the nozzle part 223 of the plated steel sheet a first cooling unit 200 according to an embodiment of the present invention can be characterized in that the cooling water sprayed in the form of droplets.
[67]
In one example, the nozzle unit 223 may be provided in a spray nozzle which can extend the injection range of the cooling water injected by spraying the cooling water in the form of droplets.
[68]
In addition there is the nozzle unit 223 may be configured to correspond to the plurality dog ​​width of the steel strip (S), for a detailed description thereto will be described later with reference to FIG.
[69]
[70]
On the other hand, the plated steel sheet according to one embodiment of the invention the first cooling device 200 further comprises a first body unit 210 which is provided on the moving path of the steel plate, and the cooling water spraying unit 220 , coupled to the first body unit 210, are provided to spray the steel sheet (S) above the cooling water, the charging unit 230, coupled to the first body unit 210, the cooling water injected It is provided to be a flow passage 221 for the cooling water in the unit 220 moves through the charging can be given to the same polarity on the cooling water sprayed from the cooling water spray unit 220.
[71]
Further, the charging unit 230 of the coated steel sheet of claim 1, the cooling unit 200 according to an embodiment of the present invention, the water jet unit 220 and integrally with the first may be coupled to the first body unit 210 have.
[72]
Thus, the coated steel strip of claim 1, the cooling device 200 of the present invention may be cooling water by being linked to the charging unit 230 is integral to the water jet unit 220 that is injected, the cooling water is injected after the polarity is given.
[73]
[74]
Here, the first body unit 210 is to act as a body, which is coupled to the cooling water spray unit 220, charging unit 230, the plating solution (L) is a coated steel sheet partially solidified coating layer (S) a is provided on the movement route.
[75]
And, the first body unit 210, a first and a frame part 211, and the first gas curtain unit 212 to control the injection range of the cooling water sprayed from the cooling water spray unit 220 There may be provided, whereby for a detailed description will be described later with reference to FIG.
[76]
[77]
The cooling water spraying unit 220 is responsible for injecting the cooling water to the steel (S). In particular, it is possible to spray after charging the coolant sprayed by the arrangement relationship between the charging unit 230.
[78]
[79]
In one example, the cooling water spray unit 220 of the coated steel sheet of claim 1, the cooling unit 200 according to an embodiment of the present invention, at least a portion is grounded to the ground (ground) applied static charge in the charging unit 230 discharging a negative charge to the ground at the time, or may be characterized by accepting a negative charge in the ground.
[80]
In other words, by under a power failure that is applied from the charging unit 230, or through a portion of the water jet unit 220 is grounded negative charge is discharged from the cooling water, a negative charge is transferred to the cooling water to form a polarity It will be charged.
[81]
And, the charging polarity of such formation is due As the charging unit 230 is provided at one side of the water jet unit 220.
[82]
Specifically, the charging unit 230 of the coated steel sheet of claim 1, the cooling unit 200 according to an embodiment of the present invention, and an electrode portion 232 that is applied to the electrostatic charge to form an electric field, the cooling water injected unit 220, in accordance with Sikkim provided with a flow passage unit 221 in which the cooling water moving to intersect with the electrode unit 232, it is possible to charge to impart polarity to the water prior to injection.
[83]
In one example, the electrode section 232 of the coated steel strip first cooling device 200 according to one embodiment of the present invention can be characterized in that disposed on the upper and lower sides of the flow path portion 221. The
[84]
[85]
Then, the coated steel sheet of claim 1, the cooling device 200 of the present invention may include injection pressure agent study (224), wherein said injection pressure agent study 224 is part of the first container via the flow path portion 221 ( 222) is provided in order to enhance the blowing force of the cooling water delivered to the nozzle section 223.
[86]
In other words, it may be that sprayed cooling water from the nozzle unit 223, only the blowing force of the flow of the cooling water, but in order to enhance further the blowing force of the cooling water may further include the pressure supply unit (224). Or it is capable of discharging the cooling water only in the injection pressure to give the injection pressure agent study (224).
[87]
In this way, the cooling water spray unit 220 of the coated steel sheet of claim 1, the cooling unit 200 according to an embodiment of the present invention, communicates with the nozzle section 223, the gas so as to give it the injection pressure in the cooling water It provides injection pressure agent which may include studying 224.
[88]
Here, the gas (A) may be in the air, the pressure supply unit 224 from the outside can be configured receive delivering gases (A), the nozzle portion (223 a gas (A) transmitted through a pipe ) to provide a can form a gas (a) passage communicating to the nozzle section 223.
[89]
[90]
The charging unit 230 is configured so that the cooling water can be injected from the charged state to have the polarity.
[91]
For this purpose, the charging unit 230 may be provided integrally with the cooling water spray unit 220 is provided, coupled to the first body unit 210.
[92]
In particular, the same cooling water the charging unit 230 is through a flow passage 221 of the cooling water jet unit 220 by placing the rear of the injection direction of the cooling water, rather than a portion of the flow path unit 221, the injection may be injected to form the polar, detailed description thereof will be described later.
[93]
[94]
Further, the charging unit 230 of the coated steel sheet of claim 1, the cooling unit 200 according to an embodiment of the present invention, further comprising an electrode support portion 231 for supporting the electrode unit 232, the electrode supporting 231, may be characterized in that the first container 222 is first provided at a front of the body unit 210, so that the or coupled integrally with the first body unit 210 that is formed .
[95]
Here, at least a portion of the flow passage 221 of the cooling water spray unit 220 in which the cooling water flows is provided on a front side of the electrode section 232 on the basis of the cooling water jetting direction, provided in the flow path unit 221 the cooling water is able to be charged to the same polarity.
[96]
In other words, the flow passage 221 there is the responsible for forwarding to the nozzle section 223 in the first storage portion 222, the cooling water is injected, wherein said flow passage (221 in the electrode unit 232 ) is the through it is possible to being partially provided, to give it the same polarity to the cooling water to move into the flow path portion 221 at the front of the charging electrode (232).
[97]
That is, it is possible to, by depending on the charging polarity adjusts the polarity imparted to the water charged for the cooling water of the electrode unit 232, by charging the whole of the cooling water injected into the same polarity.
[98]
The electrode support portion 231 is to serve to support able to be of the electrode unit 232 and the cooling water integrally with the injection unit (220).
[99]
For this purpose, the electrode supporting unit 231 may be coupled to the first body unit 210 with the cooling water spraying unit 220 is coupled, inside, it can be provided with the electrode unit 232.
[100]
The electrode unit 232 is connected to the high voltage generator (PS) for applying an external electrostatic charge by the configuration to which the electrostatic charge, the high voltage generator (PS) is grounded to the ground (ground), the electrode section 232 by applying a high voltage from the connected state to the electrode unit 232, positive (+) or negative - it is possible to maintain a state where the electrostatic charge is applied to the ().
[101]
In order for example to a power failure is downward of the positive electrode (+) to the electrode unit 232, the high voltage generator (PS) is discharged through the ground with a negative charge present in the electrode portion 232. The
[102]
On the other hand, the adhesive force wherein the electrode section 232 that is applied to the electrostatic charge, the cooling water having a passage section (221) adjacent to the electrode section 232 is to be charged to a single polarity, so the charged water is bonded to the steel sheet is increased is nopyige cooling capacity.
[103]
Here, since it is the cooling water is charged and the first container 222 connected to the flow path unit 221 are grounded to the ground, receiving a negative charge, or from the ground, discharge the negative charge to the ground, the cooling water in a single polarity it is possible to be charged.
[104]
[105]
3 is a perspective view showing a plated steel sheet a first cooling device 200 of the present invention, with reference end, the nozzle section 223 of the coated steel strip of claim 1, the cooling unit 200 according to an embodiment of the present invention that, being provided with a plurality dog ​​in the width direction of the steel strip (S) may be characterized.
[106]
This is to perform the cooling for the steel strip (S) evenly. In other words, having a plurality of the width direction of the steel strip (S), the nozzle unit 223, the steel sheet (S) in order to configure a uniform cooling effect by spraying the charged water occurs with respect to the total width of the it was.
[107]
[108]
Claim 4 if a front view showing an embodiment of the coated steel sheet of claim 1, the cooling device 200 of the present invention comprises a first gas curtain 212, refer to it, the coated steel strip according to an embodiment of the present invention 1, the cooling unit 200 may include a first gas curtain 212 that leads to the steel sheet (S) for the cooling water is provided at the peripheral portion, the injection of the nozzle section 223.
[109]
Thus, by including the first gas curtain 212, it is possible to control the injection range of the cooling water sprayed from the cooling water spray unit 220.
[110]
That is, thereby, provided with a first gas curtain coolant around that part 212 is a gas (A) injected from the injection the shielding when injecting the cooling water from the nozzle unit 223, to limit the injection range of the cooling water it can be.
[111]
The first gas curtain 212, but may be a configuration that includes the first body unit 210, and the like. That is, when the configuration to induce the injected cooling water in connection with the nozzle portion 223 of the water jet unit 220, a steel sheet may be a first gas curtain 212 of the present invention.
[112]
To this end, the first gas curtain 212 may be provided and connected to receive the pipe passes the gas (A) from the outside.
[113]
[114]
Figure 1 (a), a front view showing the plating system of the present invention, Figure 10 is a photograph showing a a sequin pattern coarsening during plating cooled by the prior art state, (b) of Figure 10 is the invention a photograph showing that a fine pattern sequin state at the time of cooling the coating layer by.
[115]
Referring to this, the plating system in accordance with another embodiment of the invention the coated steel sheet of claim 1, the cooling unit, provided on a moving path of the coated steel strip (S) discharged from the plating tank 300 and the bath 300 It may include 200.
[116]
[117]
Here, in the case of the plating vessel 300, it will serve coat the plating solution (L) to the steel sheet (S). For this, the plating tank 300, there is provided a plating solution (L), such as molten zinc solution, a port-roll 400 that guide the movement of the steel strip (S) may be provided.
[118]
[119]
Then, the coated steel sheet of claim 1, the cooling device 200 described above in the plating equipment is cooled in the later-described coated steel sheets a second cooling unit 100 performing the cooling of the plating layer of the part solidified steel sheet (S) wherein the coating layer is complete the cooling on.
[120]
In other words, the first cooling device 200 of the plating facility according to an embodiment of the present invention, plating coated on the outer surface of the steel sheet (S) solution (L) is at least lower than the melting temperature of the plating solution (L) the steel sheet (S) cooled to a temperature by receiving from the second cooling device 100, is in the relative to the steel (S) spraying the coolant polarity is given by the charge can be characterized as performing a cooling .
[121]
For this purpose, the coated steel sheet of claim 1, the cooling unit 200 is positioned at the rear of the moving path of the steel strip (S) than the second cooling device 100, the coated steel strip. That is, the steel sheet (S) is a coated steel strip 2 passing through the cooling device 100 is primarily, and then the coated steel strip first passed through a cooling unit 200, second drive after the discharge from the plating vessel 300, It will be constructed.
[122]
[123]
Then, the movement of the coating solution (L) for dealing with, not to form a movement path for cooling it to a date type form a layout of the type which at least one path is changed, wherein the steel sheet (S) with respect to the steel sheet (S) It makes it possible to reduce the size of the plating system, which must include the path.
[124]
As an example, it is possible to form a moving path of the steel strip (S) of a 'U-shaped path opening towards the ground.
[125]
In other words, the first cooling device of the plating apparatus according to an embodiment of the present invention, connected to the first region, the first region of the moving path of the steel strip traveling upward the plating vessel moving path of the steel strip is connected to the second region and the second region to move horizontally on the floor will capable of being respectively provided with a third region in which a moving path of the steel strip moves downwardly.
[126]
[127]
In addition, in order to completely solidify the coating layer formed by the coating solution (L) after performing a cooling with respect to the coating layer formed on the steel sheet (S) in the first cooling device 200, the first cooling device ( the water-cooling unit 600 of the output side 200) may be further provided.
[128]
That is, the plating solution (L) coated on the outer surface of the plating facility according to an embodiment of the present invention is provided by trailing the path of movement of the steel strip (S) than the first cooling device 200, the steel sheet (S) is Once completely solidified by the first cooling device 200 in the first cooling device 200 is capable of including a water-cooling device 600 for receiving the said steel sheet (S), performing the water cooling.
[129]
Here, the water cooling device 600 is the dryer section (620 for drying the steel sheet (S) discharged from the water-cooling unit 610 and the water-cooling unit 610 to perform cooling by supplying a cooling water with respect to the steel sheet (S) ) may include.
[130]
[131]
Further, the plating system of the present invention is provided in the outlet which in addition to containing the plating bath 300 and the first cooling device 200, the steel strip (S) is discharged from the plating tank 300, the ultrasonic vibration to form a cooling water into a mist by the plated steel sheet a second cooling device 100 for spraying the steel sheet (S) with a gas (a) may further include.
[132]
Thus, the plating system of the invention is improved and the cooling rate for by providing the coated steel sheet of claim 1, the cooling unit 200 and the plated steel sheet a second cooling device 100, the plating solution (L) The coated steel sheet (S) it is possible to, can be a fine spangle pattern that may be formed in the plating solution (L) of the zinc solution.
[133]
That is, to secure the cooling rate that can be finely divided to sequins pattern in the present invention, as as shown in Figure 10 (a) set out in, (b) of Figure 10 in comparison with the case that is not secured in the cooling rate of the prior art that will.
[134]
In addition, the it is possible to shorten the cooling solidification time of the coated coating solution (L) to the steel sheet (S) in accordance with the enhanced capability cooled by the first cooling device 200 and the second cooling device 100, a cooling line it is possible to shorten the configuration it is possible to reduce the size of the plating facility.
[135]
The coated steel sheet of claim 2, the cooling device 100 as a device of the plating solution the steel sheet (S) is coated (L) performs a cooling initially discharged from the plating tank 300, the cooling of the unsolidified coating solution (L) to be carried out.
[136]
In other words, the above-described plating system in accordance with one embodiment of the present invention, the second cooling unit 100 includes at least the plating solution (L) steel sheet discharged from the plating vessel 300 to a temperature above the melting point of (S ) with respect to the plating solution (L) on the surface, and performing cooling, at least to a temperature lower than the melting temperature of the plating solution (L) to cool the plating solution (L) delivered to the first cooling device 200 of the that it will be characterized.
[137]
That is, the second by passing a cooling device 100 is somewhat above the plating solution (L) of the first cooling device 200, the steel sheet (S) after the solidification is performed on the first cooling unit ( when cooled from 200) that it is possible to prevent the feet of the mark (pit mark) puddles on the plating layer caused by cooling water to be used.
[138]
In particular, the coated steel strip of claim 2, the cooling device 100 to the cooling by the gas (A) to cool the initial to a steel sheet (S) is a plating solution (L) coated, with the fine moisture particles are formed by using an ultrasonic by injection, it is possible to increase the cooling performance while preventing the formation of pit marks (pit mark) puddles on the unsolidified coating layer. The explanation will be described later in detail with reference to Figures 5 to 8.
[139]
In addition, when the plated steel sheet a second cooling device 100 is provided with a filter unit 140, using the difference between the movement inertial force according to a fog particle size formed by the ultrasonic units 130, to be injected into the coating layer can adjust the size of the mist particles can further enhance the efficiency of the pit mark formation prevented. The explanation will be described later in detail with reference to FIG.
[140]
[141]
Then, the plating system of the present invention is provided with a position, the air knife 500 between the plating tank 300 and the plated steel sheet a second cooling device 100, coated the plating solution in the plating tank 300, It may be configured to adjust the thickness of the (L).
[142]
That is, the plating system according to one embodiment of the present invention, the steel sheet land to (S) is a plating solution (L) of claim wherein the said plating bath (300) on the moving path of the steel sheet (S) to adjust the thickness of the 2 will, which may include an air knife 500 is provided between the cooling unit 100.
[143]
[144]
5 is a front view of a plated steel sheet a second cooling device 100 of the present invention, referring to this, the coated steel strip according to an embodiment of the present invention the second cooling unit 100 is unsolidified coating solution (L) the second body unit 110 which is provided on the moving path of the coated steel sheet (S) on the outer surface, is provided on the second body unit 110, a gas injection for injecting a gas (a) into the steel strip (S) unit 120 and the ultrasonic wave unit that is provided on the second body unit 110, by forming the cooling water into a mist in accordance with the gas (a) is injected from the gas injection unit 120 is sprayed on the steel sheet (S) ( 130) may include.
[145]
That is, by spraying the coated steel strip of claim 2, the cooling device 100 of the present invention with a cooling water mist formed by the ultrasonic units 130, unsolidified coating solution (L in the plating solution (L) cooled by the gas (A) ) is in the cooling performance can be improved, while the structure can be prevented from being recessed pit mark is formed.
[146]
[147]
The second body unit 110 is to act as a body, which is provided with the gas ejecting unit 120, an ultrasonic unit 130. In addition, it also serves to spray with the gas (A) and the ultrasonic units 130, the steel sheet (S) is coated plating solution (L) of the cooling water mist provided in provided in the gas ejecting unit 120. The For this purpose, the second body unit 110 first may include a second frame portion 111, the slit nozzle unit 112, a second gas curtain 113, and thus for details, Fig. 7 and Fig. It is described later with reference to eight.
[148]
In addition, the second body unit 110 so that the steel sheet (S) coated steel strip a second cooling device 100 of the present invention is discharged from the plating vessel 300 to cool the first, in the plating bath 300 the unsolidified coating solution (L) is discharged is provided on the moving path of the coated steel sheet (S).
[149]
[150]
The gas injection unit 120 is responsible for injecting the gas (A) in order to cool the unsolidified coating solution (L) coated on a steel sheet (S). To this end, the gas injection unit 120 may include a gas supply 121, a gas (A) the temperature can be adjusted at a low temperature or high temperature of the gas (A) in order to increase the cooling efficiency by the injection control unit It may include a (122), whereby for a detailed description will be described later with reference to FIG.
[151]
[152]
The ultrasonic units 130 in order to increase the cooling capacity of the gas (A) is injected from the gas injection unit 120, it is responsible for providing the cooling water mist in the gas (A).
[153]
Here, the gas (A) may be in the air, the ultrasonic unit 130 is a gas (A) provided with the gas ejecting unit 120, the mist is formed the cooling water into a mist, so formed by the ultrasonic vibration with the slits provided in the nozzle portion 112 of the second body unit 110 and is injected into the plating solution (L) coated on a steel sheet (S).
[154]
For this purpose, the ultrasonic units 130 may include a second storage portion 131, the ultrasonic generator 132, the mist guide portion 133. The
[155]
In other words, the ultrasonic units 130 of the coated steel strip a second cooling device 100 in accordance with one embodiment of the present invention, there is provided in the second body unit 110, the second storage portion that is the cooling water is provided ( 131), the second is provided in the container unit 131, generates ultrasonic waves due to the vibration is provided on the upper side of the ultrasonic wave-generating unit 132 and the second vessel 131 which forms the water into a mist and may include a mist guide portion 133 to the steel strip (S) is guided to a position that provides a fog formed.
[156]
The second storage portion 131 as the configuration in which the cooling water is formed as a mist generated when the vibration from the ultrasonic generator 132 provides, is provided on the second body unit 110.
[157]
Then, in the second storage portion 131 may be provided to be connected to the pipe to be supplied to the cooling water (W) from the outside.
[158]
The ultrasound generating unit 132 and it serves to form an ultrasonic vibration to form the cooling water into a mist, are provided inside the second container 131 is the cooling water supplied.
[159]
In addition, the ultrasonic generation unit 132 in order to form the ultrasonic vibration, is coupled to the voltage source and electrically and is formed of electrical energy supplied by the voltage source of a material such as a metal, modify, ceramics to change in the vibration energy.
[160]
The mist guide portion 133 in the second storage portion 131. When the cooling water is formed into a mist, thereby the slit nozzle unit 112 provided on by the ultrasonic vibration provided by the ultrasonic generation unit (132) It is responsible for the flow guides.
[161]
For this purpose, the mist guide portion 133 and the second is provided with a cap (cap) shape to the upper end of the container portion 131, a hole is formed in the slit nozzle unit 112 in a direction toward, the hole periphery, the a flange extending towards the slit nozzle unit 112 is formed.
[162]
In particular, the mist particles provided to the mist guide portion 133 and the slit nozzle unit 112 between there is provided a filter unit 140 to be described later to adjust the size of the mist particles, the slit nozzle unit (112) It is the size of the control.
[163]
[164]
6 is a front view showing the embodiment provided on the outside of the temperature adjustment section 122 is a gas supply 121 of the gas ejecting unit 120 in the plated steel sheet of the present invention, the second cooling unit 100, the reference to If the gas injection unit 120 of the plated steel sheet a second cooling device 100 in accordance with one embodiment of the present invention, there is provided in the second body unit 110, by receiving a gas (a) from the outside is provided in the gas supply unit 121 and the gas supply unit 121 for injection into the steel sheet (S), it may include a temperature control unit 122 is provided to control the temperature of the gas (a).
[165]
In other words, which may include a temperature control for adjusting the temperature of the gas (A) at a low temperature or a high temperature portion 122 in order to increase the cooling efficiency by the gas (A) injected.
[166]
The gas supply unit 121 may be passed to the gas (A) of the high pressure acts, and the gas supply unit 121 from the outside to provide a gas (A) in the slit nozzle unit (112). For this purpose, the gas supply 121 may be connected to the pipe in order to receive the delivery gas (A). Gas (A) herein may be air.
[167]
In addition, the temperature control unit 122 is provided with a cooling pipe for forming the gas (A) to serve to control the temperature of the gas (A) provided by the gas supply unit 121 and, for example a low temperature can.
[168]
Here, the temperature adjustment section 122 being provided in the interior of the gas supply section 121, in direct contact with the gas (A) provided by the gas supply unit 121 to increase the temperature control efficiency of the gas (A) there, for this example it is shown in Fig.
[169]
Since the other hand, does not block the flow path of the gas (A) to the temperature control unit 122 there may be provided external to the gas supply unit 121, the flow to the inside of the gas supply unit 121 such a case, the It is possible to maintain the flow velocity of the gas (a). In the example of it is shown in FIG.
[170]
And wherein the region of the temperature control unit 122, the gas supply unit 121 is disposed may be provided to the size of the heat exchange between the gas (A) and the temperature control unit 122 can be made sufficiently region.
[171]
[172]
In addition, the gas injection unit 120 may be configured by further comprising a gas control unit 123, it adjusts the amount of gas delivered to the gas supply unit 121 from the outside.
[173]
That is, the gas injection unit 120 of the plated steel sheet a second cooling device 100 in accordance with one embodiment of the present invention, there is provided in the gas supply unit 121, provided to adjust the flow rate of the gas delivered from the outside gas may include a control unit 123 that is.
[174]
Here, it provided that the gas control unit 123 is capable of controlling the amount of gas injected into the steel strip (S) from the slit nozzle unit 112 of the second body unit 110. Of course, the ultrasonic wave unit in contrast with the amount of mist to be formed in (130), which is set by adjusting the cooling capacity, and is used to cool the plating solution of the steel strip (S) to a desired temperature.
[175]
[176]
Figure 7 when a perspective view showing a plated steel sheet a second cooling device 100 of the present invention, reference to the second body unit (110 of the coated steel strip a second cooling device 100 in accordance with one embodiment of the present invention ) is, is provided at the front end portion of the second housing portion 111 and the second housing portion (111) facing the plate (S) is provided on the moving path of the steel strip (S), the gas ejecting unit 120 slit nozzle unit (112 supplied provided the gas (a) above the fog provided by the ultrasonic units 130 so as to inject the steel sheet (S), is larger than at least the width of the steel sheet (S) width in ) may include.
[177]
Thus, the second body unit 110, the second housing portion 111, the slit nozzle unit 112 is a gas (A) provided by the gas injection unit 120 and the ultrasonic unit (130 containing the ) plating solution (L) of the cooling water mist provided is to serve to the injection with the coated steel sheet (S).
[178]
The second housing portion 111 is non-solidified coating solution to the basic configuration, and wherein the slit nozzle unit 112 is a gas (A) is provided with the gas ejecting unit 120, an ultrasonic unit 130, the fog ( It is responsible for spraying onto L).
[179]
The slit nozzle unit 112 to spray the gas (A) and the mist particles evenly in the width direction of being provided is formed in a long hole shape with a width greater than a width of the steel strip (S), wherein the steel sheet (S) US It is configured to be able to uniformly perform the cooling of the solidified coating solution (L).
[180]
[181]
When Fig. 8 is a front view showing an embodiment in which the second body unit 110 and a second gas curtain 113 in the plated steel sheet a second cooling device 100 of the present invention, refer to it, of the present invention the second body unit 110 of the plated steel sheet a second cooling device 100 according to one embodiment, it is provided at the peripheral portion of the slit nozzle unit 112, which is injected the gas (a) and fog the plate the can 2 comprises a gas curtain unit 113 that leads to (S).
[182]
Thus it is that the second body unit 110 and a second gas curtain 113, the cooling water supplied by the gas (A) and the ultrasonic units 130 provided in the gas ejecting unit 120, the fog It is, for controlling the position when the injection is injected into the plating solution (L) coated on the steel sheet (S).
[183]
To this end, the second gas curtain 113 may be the slit may be provided in the peripheral portion of the nozzle portion 112, preferably surrounding the periphery of the slit nozzle unit 112 provided in the form.
[184]
And, the second gas curtain 113. The gas curtain (or veils) a to form, the pipe is provided with a gas (A) from the outside may be formed, and the gas (A) herein may be air have. In this way the injection at the periphery of the slit nozzle 112, the gas (A) received from the outside, it is possible to control the path of the gas (A) and the mist particles sprayed from the slit nozzle unit (112).
[185]
[186]
Figure 9 When a front view showing an operating state of the filter unit 140 in the plated steel sheet a second cooling device 100 of the present invention, refer to it, the coated steel strip according to an embodiment of the present invention the second cooling device (100 ) may include a filter unit 140 that is provided on the second body unit 110, adjusts the size of the mist particles to be sprayed on the steel strip (S).
[187]
In other words, the filter unit 140 is for adjusting the size of the mist particles is by using a difference of the movement inertial force, the injection into the coating layer according to the size of the mist particles formed by the ultrasonic unit (130).
[188]
For this purpose, the filter unit 140 may be provided with a filter housing portion 141, a control panel 142. That is, the filter unit 140 of the coated steel strip a second cooling device 100 in accordance with one embodiment of the present invention, there is provided on the path through which mist formed at the ultrasonic units 130, the second body unit 110. the filter frame 141 is provided coupled to, is provided in the filter housing portion 141, the flow path of some of the mist particles are provided to change the remaining mist throttle which particles having the collision by the movement inertial force It may comprise a portion 142.
[189]
Here, as the base frame of the filter housing portion 141 is the filter unit 140, and the second is provided in the body unit 110, more specifically, the mist which mist formed at the ultrasonic units 130, the discharge It is provided between the guide portion 133 and the slit nozzle unit (112).
[190]
The throttle portion 142 is provided in the filter housing portion 141, the flow path of the fog particles to flow through said filter frame portion 141 is configured to be some changes. In other words, when the adjustment plate 142, a portion changed to configure a path through which the mist particles, the movement from the mist particles was flow inertia relatively large particles (be) will not change the flow path, or a part flow of the By only changing the path, it is brought into collision with the control panel 142.
[191]
Thus the cost according collision particle (be) is unable to move in the slit nozzle unit 112, a particle size as stacked in the adjustment plate 142 are more and more large and camels to the second storage portion 131 .
[192]
The other hand, in the movement from the mist particles was flow inertia relatively small particles (se), without conflicting with the control panel 142 as it moves to sufficiently change the flow path enough to avoid collision with the adjustment plate 142 It is able to move in the slit nozzle unit (112).
[193]
On the other hand, the mobile inertial force is so because it is a value that is proportional to the mass of the particles, and can adjust the size of the mist particles to be provided in the slit nozzle unit (112).
[194]
[195]
For this purpose, the throttle portion 142 may be provided with a plurality dogs at regular intervals on the filter frame portion 141.
[196]
That is, the throttle portion 142 of the coated steel strip a second cooling device 100 in accordance with one embodiment of the present invention can be characterized in that comprising a plurality of dog regular intervals on the filter frame portion 141.
[197]
By this arrangement, is guided in the mist guide portion 133 is able to be efficiently filtered by the fog particles provided.
[198]
[199]
Further, the throttle portion 142 of the coated steel strip a second cooling device 100 in accordance with one embodiment of the present invention can be characterized in that the obliquely provided in the path through which the mist particles.
[200]
The reason that an angle having the throttle in the flow path of the mist particles, and is used to adjust the change degree of the path through which the mist particles.
[201]
In other words, because of the oblique extent of the adjustment plate the rate of change of the path through which the mist particles further increases is large, and only relatively small particles to pass through and to be fed to the slit nozzle unit 112, and the oblique extent less the fog the small rate of change of the flow path of the particles, it is possible to pass through the relatively large particles to be controlled able to be supplied to the slit nozzle unit (112).
[202]
In order to change the oblique extent of these controls, and may be configured to be oblique about a connection to another filter unit 140, but may be configured to be replaced, the angle adjustment to adjust the angle of the throttle motor or the like.
[203]
[204]
Plated steel plate cooling method according to an embodiment of the present invention, the wiping for adjusting the coating solution, the plating process and the thickness of the land is the plating solution (L) to the steel sheet (S) coated with (L) to the steel sheet (S) the cooling step comprises the step of cooling process, and is, but cooling by spraying a cooling water on the steel sheet (S), the cooling water may be characterized in that the injection into the charged state.
[205]
Specifically, the cooling step of the coated steel plate cooling method according to an embodiment of the present invention, the plating solution (L) is being cooled by the line cooling step and the pre-cooling step of performing cooling with respect to the coated steel sheet (S) after cooling by spraying the cooling water, the same polarity is granted by the charging with respect to the coated steel strip (S) may include a cooling step.
[206]
[207]
Wherein the plating step is a step wherein the steel sheet (S) to the plating vessel 300 is to be performed to move while supported by the port roll 400. The
[208]
That is, that while the plating process in the plating solution (L) wherein the steel sheet (S) to the inside of the plating tank 300 contained this passage to cause the plating solution (L) to the outer surface of the steel strip (S).
[209]
[210]
The wiping process, when discharged from the plating solution (L) to the steel sheet (S) in the plating process, the coating conditions, the thickness of the plating solution (L) is applied by injecting a gas such as air to the steel sheet (S) adjusting by a process in which adjusting the thickness of the final plating layer to be formed.
[211]
[212]
Then, the pre-cooling stage is discharged from the plating vessel 300 using the second cooler 100 by performing cooling with respect to the steel sheet (S) passing through the wiping process still molten because of the plating solution to perform cooling with respect to the (L), an order to prevent the concave pit marks and the like at the time of solidification occurs, and the gas to inject, in addition to miniaturization of the cooling water to the ultrasonic vibration in order to increase the cooling capacity type It is sprayed with a fog.
[213]
That is, the pre-cooling step of the coated steel plate cooling method according to another embodiment of the present invention, with respect to the plating solution (L) on at least the steel sheet (S) surface formed to a temperature above the melting temperature of the plating solution (L) spraying the mist formed in the gas and the ultrasonic vibration together performs cooling, be characterized in that at least a transmission to a lower temperature than the melting temperature of the plating solution (L) in the post-cooling stage to cool the plating solution (L) can.
[214]
Accordingly, the line in the cooling step is, while increasing the cooling capacity than if only the gas jet prevents the formation of pit marks which can be formed as the plating solution (L) is solidified.
[215]
In other words, the post-cooling stage because it does not spray a fine mist by the ultrasonic vibration, if the plating solution (L) is performed after the solidification, the pit mark in the coating layer formed by the coating solution (L) in the because it can be formed, in the pre-cooling stage is lower than the melting temperature of at least the plating solution (L) the temperature is to be passed to the post-cooling stage to cool the plating solution (L).
[216]
[217]
Wherein after the cooling step is car 2 using a plating solution (L) and the steel sheet is cooled to (S), the first cooling device 200, the car 1 using the second cooling device 100 in the cooling step, the pre- thereby cooling the plating solution (L) and the steel (S).
[218]
In particular, since the cooling step after the received at least passes the plating layer cooled to a temperature lower than the melting temperature of the plating solution (L) in the pre-cooling step performs a cooling, to consider the problem that the pit marks formed in the coating layer is not, it is possible to cool with the cooling water spray without micronization.
[219]
In addition, after the above-mentioned coated steel sheet cooling method according to another embodiment of the present invention the cooling stage is, take the line in the cooling step passes the plated steel sheet at least cooled to a temperature lower than the melting temperature of the plating solution, with respect to the plate by spraying the cooling water is given polarity by the charge can be characterized in that it performs the cooling.
[220]
Accordingly, by increasing the attractive force of the cooling water on the steel strip (S) or the coating layer it is possible to increase the cooling capacity.

Claims
[Claim 1]
Cooling water spray unit for spraying cooling water to the coated steel strip; It is disposed on at least one side of the water jet unit, a charging unit for charging the cooling water; The cooling water spraying unit, the coated steel strip of claim 1, characterized in that the cooling unit is installed in the cooling water to be injected in a state of being charged by the charging unit, comprising: a.
[Claim 2]
The method of claim 1, wherein the first storage portion to the cooling water spraying unit, receiving the coolant; It is connected to the first container portion, the flow passage for the cooling water movement; And it is connected to the flow path portion receives the coolant delivered from the first storage portion, a nozzle portion for injecting the cooling water into the plated steel sheet; Plated steel sheet a first cooling device comprising a.
[Claim 3]
The method of claim 2 wherein the coated steel sheet of claim 1, the cooling unit, characterized in that the first container portion, grounded.
[Claim 4]
The method of claim 2, wherein said charging unit, is applied to the electrostatic electrode portion to form an electric field; Including, and the flow path portion coated steel sheet of claim 1, characterized in that the cooling device is arranged so as to intersect with the electrode portion.
[Claim 5]
The method of claim 4, wherein the electrode portion coated steel sheet of claim 1, characterized in that the cooling unit is disposed in the flow path portion the upper and lower sides.
[Claim 6]
The method of claim 4, wherein the charging unit is, the electrode support that supports the electrode portion; Further comprising, wherein the electrode support portion, wherein the first plated steel sheet a first cooling device characterized in that the installation to be, or otherwise combined with the first body unit and integral with the front side of the first body unit in the container portion is formed of.
[Claim 7]
The method of claim 2, wherein the nozzle unit, the coated steel strip of claim 1, characterized in that a cooling device for spraying the cooling water in the form of droplets.
[Claim 8]
The method of claim 2, wherein the nozzle unit, the coated steel strip first cooling device characterized in that the dog is provided with a plurality in the transverse direction of the coated steel strip.
[Claim 9]
The method of claim 2, wherein the cooling water spray unit, and in communication with the nozzle unit, the injection pressure agent study to provide a gas jetting pressure to give the cooling water; The coated steel sheet of claim 1 further comprising a cooling device.
[Claim 10]
The method of claim 2 wherein the first gas curtain unit is provided in a peripheral portion of said nozzle, leads to the cooling water is injected into the steel sheet; The coated steel sheet of claim 1 further comprising a cooling device.
[Claim 11]
Bath; And, any one of claims 1 to 10, wherein any one of the plated steel sheet of the first cooling apparatus provided on a moving path of the coated steel strip discharged from the plating bath; Plating facility comprising a.
[Claim 12]
12. The method of claim 11, the coated steel strip a second cooling device provided on the steel strip traveling path between the plating tank and the first cooling device; Plating facility comprising a.
[Claim 13]
The method of claim 12, wherein the second cooling device includes a plating system characterized in that to form the cooling water into a mist sprayed on the steel plate with gas by ultrasonic vibration.
[Claim 14]
The method of claim 13, wherein the second cooling device includes a gas injection unit for injecting gas into the steel sheet; To form a cooling water into a mist in accordance with the gas injected from the gas injection unit an ultrasonic unit for spraying the steel sheet; And a filter unit that is provided on the moving path of the gas injected from the mist and the gas ejecting units is formed by the ultrasonic unit; Plating facility comprising a.
[Claim 15]
15. The method of claim 14, wherein the filter unit, the plating facility, characterized in that for adjusting the size of the mist particles to be sprayed on the steel sheet.
[Claim 16]
16. The method of claim 15, wherein the filter unit includes a filter housing portion is provided on the flow path of the mist formed by the ultrasonic unit; And is provided on the filter frame portion, the flow path of some of the mist particles are provided to change the remaining mist particles throttle portion that is provided with the collision by the movement inertial force; Plating facility comprising a.
[Claim 17]
17. The method of claim 16, wherein the throttle portion is provided with a plurality of dog regular intervals on the filter frame portion, plating system characterized in that the obliquely provided in the path through which the mist particles.
[Claim 18]
And a plating process coated the coating solution on the steel sheet, land on the steel sheet, the wiping step and a cooling step, and the cooling step of adjusting the thickness of the plating solution, but cooling by spraying a cooling water on the steel plate, the cooling water the plated steel sheet cooling method characterized in that the injection into the charged state.
[Claim 19]
The method of claim 18 wherein the cooling line wherein the cooling step is performed by cooling with respect to the plating solution coated steel sheet; And a cooling step after cooling by spraying the same polarity by the charging for a given cooling the cooled steel sheet in the pre-cooling stage; Plated steel plate cooling method comprising a.