Art
[1]
The present invention relates to a plating system comprising prior cooling, and this coated 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 air, 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 has an initial injection of air by the 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 air to 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 7 (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]
An object of the present invention to provide plating system including by increasing the cooling rate of the coated layer on the steel sheet, is to improve the quality of the plated steel sheet as well, the prior coating to prevent increase in size of the facility and this steel plate cooling apparatus.
Problem solving means
[15]
Plated steel sheet prior cooling apparatus according to an embodiment of the present invention is provided in the preceding body unit, the leading body unit that is disposed on the movement path of the unsolidified coating solution was coated steel sheet on the outer surface, the air for injecting air into the plate and ejecting unit is provided in the preceding unit body may include an ultrasonic unit for spraying the steel sheet in accordance with the air to form a cooling water into the mist injected from the air injection unit.
[16]
Further, there is provided in the ultrasound unit, the leading body unit of the plated steel sheet prior cooling apparatus according to an embodiment of the present invention, the preceding storage portion that the cooling water is provided, is provided on the inside of the preceding storage portion, the ultrasonic caused by the vibration generated by the ultrasonic generator is provided in the upper part and of said container prior to forming the cooling water to the fog, the mist may include guiding portions for guiding the formed mist to a position provided by the steel plate.
[17]
Furthermore, the air ejecting unit of the coated steel strip preceding the cooling device in accordance with one embodiment of the present invention, there is provided in the preceding body unit, and receives the air from the outside provided in the air supply unit and the air supply for injecting into the steel strip , temperature control is provided to control the temperature of the air may include a.
[18]
Further, the air injection unit of the plated steel sheet prior cooling apparatus according to an embodiment of the present invention, there is provided in the air supply part, it may include a controlled amount of air that is provided to adjust the flow rate of the air delivered from the external.
[19]
In addition, the prior body unit of the plated steel sheet prior cooling apparatus according to an embodiment of the present invention, there is provided at the front end portion wherein the leading frame section facing the leading frame part and the steel sheet is provided on the moving path of the steel sheet, to eject the fog provided by the air and the ultrasonic unit provided in the air ejecting unit to the steel sheet, it may include a slit nozzle is provided with at least a width greater than a width of the steel sheet.
[20]
In addition, the prior body unit of the plated steel sheet prior cooling apparatus according to an embodiment of the present invention, there is provided in the peripheral portion the slit nozzle unit, can include the air and the mist is injected the steel sheet by induced preceding air curtain unit for have.
[21]
Further, the plated steel sheet prior cooling apparatus according to an embodiment of the present invention may comprise a filter unit that is provided on the leading body unit, to adjust the size of the mist particles to be sprayed on the steel sheet.
[22]
In addition, the filter unit of the coated steel strip prior cooling apparatus according to an embodiment of the present invention, there is provided on the flow path of the mist formed in the ultrasound unit, a filter housing portion is provided, coupled to the preceding body unit, the filter is provided on the frame portion, the flow path of some of the mist particles are provided to change the remaining mist particles may include a control panel that is provided with the collision by the movement inertial force.
[23]
Further, the throttle portion of the coated steel strip prior cooling apparatus according to an embodiment of the present invention can be characterized in that the dog plurality in the filter frame portion which is provided at a predetermined interval.
[24]
Further, the throttle portion of the coated steel strip prior cooling apparatus according to an embodiment of the present invention can be characterized in that the obliquely provided in the path through which the mist particles.
[25]
Further, the plating apparatus according to another embodiment of the invention the plating solution in a plating tank which is provided to pass through the steel sheet, the plating solution is preceding the coated steel strip which is provided to cool the coated steel sheet to an outer surface cooling of the plating bath apparatus and the provided than prior to cooling unit trailing the moving path of the steel plate and may include a post-coated steel strip cooling device in which the plated steel sheet prior to the cooling device with a re-cooling the cooling plate.
Effects of the Invention
[26]
Plating system comprising plated steel sheet prior cooling, and this, the present invention has the advantage that by increasing the cooling rate of the coated layer on the steel sheet, is to improve the quality of the coated steel strip as well, to avoid the increase in size of the facility.
[27]
In particular, when the cooling by air in cooling the initial to a steel sheet a plating solution coated, but by spraying the mist particles are formed by using an ultrasonic together, prevent the pit mark puddles on the unsolidified coating layer formed to increase the cooling capacity there is an effect that it is possible.
[28]
In addition, when the filter unit is provided, by using a difference of the movement inertial force according to the size of the mist particles formed by the ultrasonic wave unit, it is possible to adjust the size of the mist particles to be injected into the coating layer, further the efficiency of the pit mark formation prevention It may have an effect to increase.
Brief Description of the Drawings
[29]
1 is a front view showing the plating system of the present invention.
[30]
2 is a front view showing a plated steel sheet prior cooling apparatus according to the present invention;
[31]
3 is a front view of a temperature control of the air ejecting unit adding the illustrated embodiment provided on the outside of the air supply in the coated steel prior cooling apparatus according to the present invention;
[32]
Figure 4 is a perspective view showing a plated steel sheet prior cooling apparatus according to the present invention;
[33]
Figure 5 is a front view showing an embodiment in which the leading body unit including leading the air curtain unit in a plated steel sheet prior cooling apparatus according to the present invention;
[34]
6 is a front view showing an operating state of the filter unit on the plated steel sheet prior cooling apparatus according to the present invention;
[35]
Figure 7 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
[36]
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.
[37]
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.
[38]
[39]
2 is a front view showing the coated steel prior cooling device 100 of the present invention, referring to this, the prior-plated steel plate cooling apparatus 100 according to an embodiment of the present invention is unsolidified coating solution (L) is the outer surface preceding body unit 110 which is provided on on the movement route of the coated steel sheet (S), the preceding is provided to the body unit 110, the steel strip (S) to the air injection unit 120 for injecting the air (a) and is provided on the leading body unit 110, comprise the ultrasound unit (130) for spraying the steel sheet (S) along the air (a) is injected from the air injection unit 120 to form a cooling water into a mist can.
[40]
In other words, unsolidified coating solution (L) at the time of plating solution (L) cooled by by spraying the coated steel strip preceding the cooling device 100 of the present invention with a cooling water mist formed by the ultrasonic units 130, the air (A) depression configured such that it can be prevented from being recessed pit mark is formed in the yet to be able to increase the cooling capacity.
[41]
[42]
Here, the leading body unit 110 is to act as a body, which is provided with the air ejecting unit 120, an ultrasonic unit 130. In addition, it also serves to injection with the air (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 air ejecting unit 120. To this end, the leading body unit 110 is the preceding frame section 111, a slit nozzle 112, the preceding may include an air curtain 113, and thus for details, see FIGS. 4 and 5 to be described later.
[43]
In addition, the prior body unit 110 that is to the steel sheet (S) coated steel strip preceding the cooling device 100 of the present invention is discharged from the plating vessel 300 to cool the first, discharged from the bath 300 is provided on the moving path of the unsolidified steel plating solution (S) (L) is coated.
[44]
[45]
The air ejecting unit 120 plays a role for injecting air (A) in order to cool the unsolidified coating solution (L) coated on a steel sheet (S). To this end, the air injection unit 120 may include an air supply unit 121, the air (A) the temperature can be adjusted at a low temperature or high temperature the temperature of the air (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.
[46]
[47]
The ultrasonic units 130 in order to increase the cooling capacity of the air (A) is injected from the air injection unit 120, it is responsible for providing the cooling water mist in the air (A).
[48]
Here, the ultrasonic wave unit 130 is formed into a mist of water by ultrasonic vibration, of the so formed mist air the preceding body unit 110, with the (A) provided by the air ejecting unit 120, the slit providing a nozzle unit 112 and is injected into the plating solution (L) coated on a steel sheet (S).
[49]
For this purpose, the ultrasonic units 130 may include a leading container part (131), the ultrasonic generator 132, the mist guide portion 133. The
[50]
In other words, the ultrasonic units 130 of the coated steel strip prior cooling device 100 according to one embodiment of the present invention, there is provided in the preceding body unit 110, the leading vessel 131 is the cooling water is provided, is provided within the leading vessel 131, generates ultrasonic waves due to the vibration is provided on the upper side of the ultrasonic wave-generating unit 132 and the leading container part (131) forming the cooling water to the fog, the the formed mist It may include a mist guide portion 133 for guiding the steel sheet to a position (S) is provided.
[51]
The leading container part (131) is a configuration in which the cooling water is formed as a mist generated when the vibration from the ultrasonic generator 132 provides, is provided at the leading body unit 110. The
[52]
Then, the leading vessel 131 may be provided to be connected to the pipe to be supplied to the cooling water (W) from the outside.
[53]
The ultrasound generating unit 132 and it serves to form an ultrasonic vibration to form the cooling water into a mist, is provided inside the leading vessel 131 in which the cooling water provided.
[54]
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.
[55]
When the mist guide portion 133 is the cooling water supplied to the preceding storage portion 131 by ultrasonic vibration provided by the ultrasonic wave-generating unit 132 it is formed of a fog flow it to the slit nozzle unit (112) It is responsible for the guide.
[56]
For this purpose, the mist guide portion 133 is provided at the upper end of the preceding storage portion 131 by a cap (cap) shape, the hole is formed in the slit nozzle unit 112 in a direction toward, the hole periphery, the said a flange extending towards the slit nozzle unit 112 is formed.
[57]
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.
[58]
[59]
If 3 is a front view showing the embodiment provided on the outside of the temperature adjustment section 122 is the air supply unit 121 of the air ejecting unit 120 in the plated steel sheet prior cooling device 100 of the present invention, reference to the air injection unit 120 of the plated steel sheet prior cooling device 100 according to one embodiment of the present invention, there is provided in the preceding body unit 110, the steel sheet receiving the air (a) from the outside ( is provided in the air supply unit 121 and the air supply portion 121 for ejecting the S), it may include a temperature control unit 122 is provided to control the temperature of the air (a).
[60]
In other words, that may contain air (A) the temperature control unit 122 for adjusting the temperature of the air (A) at a low temperature or high temperature to increase the cooling efficiency by the jet.
[61]
The air supply unit 121 may be delivered to the air (A) of the high pressure acts, wherein the air supply unit 121 from the outside to provide an air (A) in the slit nozzle unit (112). To this end, the air supply unit 121 may be connected to the pipe in order to receive the delivery air (A).
[62]
Then, the temperature adjusting unit 122 serves to control the temperature of the air (A) provided by the air supply unit 121, to be provided with a cooling pipe for forming the air (A) for example by low temperature can.
[63]
Here, the temperature control unit 122 to increase the temperature control efficiency of the air supply unit 121, the air (A) being provided in the interior, in direct contact with the air (A) provided by the air supply unit 121 of the there, for this example it is shown in Fig.
[64]
Since the other hand, not to the temperature control unit 122 is there also be provided at the outside of the air supply unit 121, in which case blocks the flow path of the air (A) flowing in the inside of the air supply unit 121, the it is possible to maintain the flow rate of air (a). In the example of it is shown in FIG.
[65]
[66]
In addition, the air ejecting unit 120 can be configured to adjust the amount of air delivered to the air supply unit 121, by further comprising an air flow control unit 123, from the outside.
[67]
That is, the air injection unit 120 of the plated steel sheet prior cooling device 100 according to one embodiment of the present invention, there is provided in the air supply part 121, is provided to adjust the flow rate of the air delivered from the external It may include an air quantity adjustment unit 123.
[68]
Here, it provided that the air quantity adjusting unit 123 is capable of controlling the amount of air injected into the steel strip (S) from the slit nozzle unit 112 of the preceding body unit 110. Of course, the ultrasonic unit ( in contrast with the amount of fog that is formed at 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.
[69]
[70]
4 is a perspective view showing a plated steel sheet prior cooling device 100 of the present invention, referring to this, the leading body unit 110 of the plated steel sheet prior cooling device 100 according to one embodiment of the present invention, is provided at the front end portion of the preceding frame section 111 and the preceding frame section 111 facing the steel sheet (S) is provided on the moving path of the steel strip (S), provided in the air ejecting unit 120 so for injecting the air (a) and the fog steel sheet (S) provided in the ultrasonic units 130, may include at least the slit nozzle unit 112 is provided more significantly the width of the steel strip (S) have.
[71]
Thus the inclusion of the preceding body unit 110 in the preceding frame section 111, a slit nozzle 112, the air (A) and the ultrasonic units 130 provided by the air ejecting unit 120 plating solution (L) of coolant mist is intended to provide a role of a jet with a coated steel sheet (S).
[72]
Wherein the preceding frame section 111 is the air ejecting unit 120, and the ultrasonic units 130, the default configuration is provided, the slit nozzle unit 112 US solidified plating solution (L air (A) and fog ) it is responsible for spraying onto.
[73]
The slit nozzle unit 112 to spray the air (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).
[74]
[75]
Figure 5 is when a front view illustrating an embodiment in which the leading body unit 110 includes a preceding air curtain unit 113 in the plated steel sheet prior cooling device 100 of the present invention, reference to one embodiment of the present invention the leading body unit 110 of the plated steel sheet prior cooling apparatus 100 according to the induction in the air (a) and the fog steel sheet (S) which is provided on the periphery of the slit nozzle 112, the injection which may include a preceding air curtain unit 113.
[76]
Thus, the prior body unit 110, the leading air not containing the curtain portion 113, wherein the air ejecting unit cooling water provided by the air (A) and the ultrasonic units 130 provided by the 120 Mist the when injected into the plating solution (L) coated on a steel sheet (S), for controlling the position of injection.
[77]
For this purpose, the prior air curtain unit 113 may be a 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.
[78]
And, in the prior air curtain unit 113 to form the air curtain, the pipe that from the outside air (A) provided to be formed, and thus the slit nozzle unit 112, the public passed from the outside by injection in the periphery, it is possible to control the path of the air (a) and the mist particles sprayed from the slit nozzle unit (112).
[79]
[80]
6 is a front view showing the operating state of the filter unit 140 in the plated steel sheet prior cooling device 100 of the present invention, referring to this, the prior-plated steel sheet according to one embodiment of the invention the cooling device 100 is the preceding is provided to the body unit 110 may include a filter unit 140 for adjusting the size of the mist particles to be sprayed on the steel strip (S).
[81]
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).
[82]
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 plated steel sheet prior cooling device 100 according to one embodiment of the present invention, there is provided on the path through which mist formed at the ultrasonic units 130, the leading body unit (110 ), filter frames 141 are 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 portion that is particles having the collision by the movement inertial force ( 142) may include.
[83]
Here, as the base frame of the filter housing portion 141 is the filter unit 140, the preceding is provided to the body unit 110, more specifically, the mist guide the mist formed in the ultrasonic units 130, the discharge It is provided between the section 133 and the slit nozzle unit (112).
[84]
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.
[85]
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 in the preceding vessel 131.
[86]
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).
[87]
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).
[88]
[89]
For this purpose, the throttle portion 142 may be provided with a plurality dogs at regular intervals on the filter frame portion 141.
[90]
That is, the throttle portion 142 of the coated steel prior cooling device 100 according to one embodiment of the present invention can be characterized in that the dog is provided with a plurality regular intervals on the filter frame portion 141.
[91]
By this arrangement, is guided in the mist guide portion 133 is able to be efficiently filtered by the fog particles provided.
[92]
[93]
Further, the throttle portion 142 of the coated steel prior cooling device 100 according to one embodiment of the present invention can be characterized in that the obliquely provided in the path through which the mist particles.
[94]
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.
[95]
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).
[96]
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.
[97]
[98]
Also, the present invention is that by presenting the plating system that includes the coated steel prior cooling device 100, by increasing the cooling rate of the coated layer on the steel sheet (S), improve the quality of the coated steel strip (S) as well as, it is possible to prevent the enlargement of the facility.
[99]
[100]
Referring to the drawings, Figure 1 is a front view showing the plating system of the present invention, Figure 7 (a) is a photograph showing a sequin pattern is coarsened at the time of plating layer cooled by a conventional state of the art, Fig. 7 (b ) is a photograph showing a pattern finer spangles the state at the time of cooling the coating layer by the present invention.
[101]
Referring to this, the plating system of the present invention, the plating solution (L) in the steel sheet a plating solution (L) The coated steel sheet to the outer surface in the plating vessel 300, the plating tank 300 which is (S) is provided to pass through (S ) to be provided to the trailing in the moving path of the coated steel strip preceding the cooling unit 100 and the steel strip (S) than the preceding cooling device which is provided to cool the plated steel sheet prior cooling device (steel sheet 100) is cooled (S ) can comprise a post-coated steel strip cooling device 200 is provided to re-cooled.
[102]
Since this by providing a plated steel sheet prior cooling unit 100 and the plated steel sheet post-cooling apparatus 200, the plating solution (L) is to improve the cooling rate of the coated steel sheet (S), plating such as zinc solution solution may be a finely divided sequin patterns that may be formed in (L).
[103]
That is, to secure the cooling rate that can be finely divided to sequins pattern in the present invention, as as shown in Figure 7 (a) set out in, (b) of Figure 7 in comparison with the case that is not secured in the cooling rate of the prior art that will.
[104]
[105]
Here, the coated steel prior cooling device 100 is a plating solution (L) The coated steel sheet (S) is an apparatus for performing the cooling initially discharged from the plating vessel 300, for the unsolidified coating solution (L) and performs the cooling, the description has been described in detail above.
[106]
That is, when the cooling by the air (A) to cool the initial to the plated steel sheet prior cooling apparatus 100 includes a plating solution (L) The coated steel sheet (S), injected with a fine moisture particles are formed by using an ultrasonic Thereby, while preventing the formation of recessed pit mark (pit mark) in the unsolidified coating layer can improve the cooling performance. The explanation was explained in detail earlier with reference to FIG. 2 to FIG.
[107]
In addition, when the plated steel sheet prior 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, the mist is sprayed in the coating layer can adjust the size of the particles, pits, and can further increase the efficiency of the mark formation prevention, the description thereof is the same as previously described in detail with reference to FIG.
[108]
[109]
Further, the plated steel sheet post-cooling apparatus 200 to a device that was cooled in the coated steel prior cooling unit 100 performing the cooling of the plating layer of the part solidified steel sheet (S), finishing cooling of the coating layer do.
[110]
For this purpose, the coated steel sheet post-cooling apparatus 200 is placed in the rear of the moving path of the steel strip (S) than that of the plated steel sheet prior cooler 100. That is, the steel sheet (S) is adapted to pass through the coated steel prior cooling device 100 is primarily, and then second pass away the plated steel sheet post-cooling apparatus 200 after being discharged from the bath 300 It will be.
[111]
In the case of the plating vessel 300, there is a role-coated the coating 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.
[112]
The position between the plating tank 300 and the plated steel sheet prior cooling apparatus 100 is provided with a air knife 500 and adjusting the thickness of the coated the coating solution (L) in the plating bath 300 it can be configured.

Claims
[Claim 1]
Preceding body unit is provided on the moving path of the unsolidified coating solution is coated on the outer surface plate; Air injection unit for the preceding is provided to the body unit, it injects air into the plate; And an ultrasonic unit for spraying the steel sheet in accordance with the air is provided at the leading body unit, to form a water mist to be injected from the air injection unit; Plated steel sheet prior to the cooling unit comprises a.
[Claim 2]
The method of claim 1, wherein the ultrasonic unit, is provided on the body leading unit leading container part that the coolant is provided; It is provided within the leading container part, by generating an ultrasonic vibration by the ultrasonic wave generating unit which forms the water into a mist; And the mist guide portion that is provided on the upper side the leading container portion, inducing the mist formed in the location provided that the steel sheet; Plated steel sheet prior cooling device comprising a.
[Claim 3]
The method of claim 1, wherein the air injection unit, is provided on the body leading unit, receiving air from the external air supply for injecting into said steel sheet; And it is provided in the air supply unit, a temperature control unit provided to control the temperature of the air; Plated steel sheet prior cooling device comprising a.
[Claim 4]
The method of claim 3, wherein the air injection unit, is provided in the air supply unit, adjustable amount of air provided to adjust the flow rate of the air delivered from the external unit; Plated steel sheet prior cooling device comprising a.
[Claim 5]
The method of claim 1, wherein the preceding body unit, the preceding frame section is provided on the moving path of the steel sheet; And it is provided at the front end portion wherein the leading frame section facing the steel sheet, so as to spray the mist supplied by the air and the ultrasonic unit provided in the air ejecting unit to the steel sheet, at least provided with a width greater than a width of the steel strip slit nozzle unit; Plated steel sheet prior cooling device comprising a.
[Claim 6]
The method of claim 5, wherein the body unit is followed, prior to the air curtain unit is provided in the peripheral portion the slit nozzle portion, inducing the air and the mist that is sprayed into the steel sheet; Plated steel sheet prior cooling device comprising a.
[Claim 7]
The method of claim 1, wherein the filter unit is provided in the preceding body unit, to adjust the size of the mist particles to be sprayed on the steel sheet; Plated steel sheet prior to the cooling unit comprises a.
[Claim 8]
The method of claim 7, wherein the filter unit, is provided on the flow path of the mist formed in the ultrasound unit, a filter housing portion is provided, coupled to the preceding body unit; Is provided in 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; Plated steel sheet prior cooling device comprising a.
[Claim 9]
The method of claim 8, wherein the throttle portion, the coated steel strip prior cooling device, characterized in that the dog plurality in the filter frame portion which is provided at a predetermined interval.
[Claim 10]
10. The method of claim 9, wherein the throttle portion, the coated steel strip cooling apparatus prior to being obliquely provided in the path through which the mist particles.
[Claim 11]
Plating bath which is provided to pass through the steel sheet with the plating solution; Any one of claims 1 to 10, any one of the plated steel sheet prior cooling unit of which is provided, wherein to cool the coating solution is coated on the outer surface of the steel sheet in the plating bath; And a coated steel sheet post-cooling apparatus which is included in and provided by the post-movement path of the plate than the preceding cooling system, again cooling the coated steel prior cooling unit to cool a steel sheet; Plating facility comprising a.