KR100732686B1 - Device for removing particle on surface of conduction roll - Google Patents

Abstract

An object of the present invention is to detect the metal using the point that the foreign matter attached to the surface of the conductive roll is metallic dust and metal chips and to remove it by using an electromagnet, manufacturing a plated steel sheet to prevent defects such as dents and build-up The present invention provides an apparatus for treating a foreign material on the surface of a conductive roll.

Therefore, the conductive roll surface foreign matter treatment apparatus of the present invention includes an electromagnet selectively attached to the surface of the conductive roll, and a contacting means for bringing the electromagnet into close contact with the surface of the conductive roll, and a removal unit for removing metallic foreign matter on the surface of the conductive roll. Wow; A collection processing unit for processing the metallic foreign matter removed by the removal unit, including a collecting means for collecting and discharging the metallic foreign matter dropped from the surface of the electromagnet by the brush; A guide bar installed in the width direction of the conductive roll, the main base on which each component is installed and slidably along the guide bar, a driving means for moving the main base, and a lower portion of the conductive base to remove metallic foreign substances on the surface of the conductive roll. Including a sensor for detecting and controlling the drive means comprises a moving unit for moving the removal unit along the conductive roll width direction.

Main base, electromagnet, brush, rotary vane, filter, collection box

Description

Device for removing particle on surface of conduction roll}

1 is a schematic view showing a state in which the foreign matter processing apparatus according to the present invention is installed on a conductive roll.

2 is a block diagram of a foreign substance treatment apparatus according to the present invention.

3 is a perspective view of the combination of the foreign matter treatment device according to the present invention.

4 and 5 are cross-sectional views showing the use state of the conductive roll surface foreign matter removal apparatus according to the present invention.

6 is a flow chart showing the operation of the foreign matter treatment apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

11: feed screw 12: main motor

20: main base 25: sensor

30: electromagnet 32: fixed bar

35: guide member 36: non-conductor

37: conductor 38: power brush

41: driving cylinder 42: rack bar

45,45 ', 70,71: Gear 46: Operating member                 

49: guide roll 62: rotating cylinder

64: brush 66: rotary wing

68: radial bearing 72: drive motor

80: filter case 82: filter

83: collection box

The present invention relates to a conductive roll for energizing a strip in a plated steel sheet manufacturing process, and more particularly, to a conductive roll surface foreign material removal device for removing foreign substances generated on the surface of the conductive roll.

In general, the plating of steel sheets is carried out by a hot dip plating method in which a strip is deposited in a plating bath of a metal to be fused to form a plating layer, and an electrolytic solution containing ions of metals to be charged and electrodeposited on a steel sheet as an anode. There is an electroplating method for forming a plating layer.

In particular, the electroplating method has no heating and cooling process compared to the hot dip plating method, so that the mechanical properties of the steel sheet can be maintained, and the adhesion is easily controlled because the amount of adhesion is determined by the current density and line speed.

In addition, since the structure of the plating layer is fine, there is no weak alloy layer between the plating layer and the base steel sheet, and one-side plating is possible, so the steel sheet produced by the electroplating method is the mainstream.

Electroplated steel sheet production equipment for producing steel sheets by the electroplating method includes an entrance facility consisting of a payoff reel, a welder, and an entrance looper, a central facility for degreasing, pickling, electroplating and post-treatment, an exit looper and an oil supply facility, It consists of an exit facility consisting of an examination room and a tension reel.

Here, the electroplating apparatus in which the electroplating work is performed on the strip in the central equipment includes a plating cell in which the electrolyte is contained, a conductive roll in which the steel sheet is in close contact with the circumferential surface and rotated by being locked in the plating cell, and the cathode is energized, It includes a positive plate.

Therefore, the strip is immersed in the plating cell by the conductive roll and rotated. When current flows into the conductive roll, the strip adhered to the conductive roll is charged with the negative electrode, and the positive electrode plate electrolytically dissolves the electrolyte. Electrode is plated and plated on a strip charged with.

However, the conventional plating apparatus has a problem that the treatment for the metal dust generated during the plating process is not properly made.

That is, at the rubber position of the conductive roll that rotates in contact with the edge of the strip during the plating process, the plating powder and the metal dust generated during the plating operation are attached, and the metal dust is agglomerated into metal chips to adhere to the surface of the conductive roll. There is a problem of causing a dent defect on the surface of the coated steel sheet.

In particular, when the width of the plated steel sheet is changed from the small width to the wide width, the metallic dust generated in the edge portion of the narrow steel sheet is transferred to the surface of the wide steel sheet to cause defects such as bending, which causes deterioration of quality. A problem arises.

Accordingly, the present invention has been made to solve the above problems, by detecting the metal using the point that the foreign matter adhering to the surface of the conductive roll and the metal dust and the metal chip, by removing it using an electromagnet, dent and build-up, etc. The purpose of the present invention is to provide a conductive roll surface foreign matter treatment apparatus of the plated steel sheet manufacturing process that can prevent the defects.

In order to achieve the above object, the conductive roll surface foreign matter treatment apparatus of the present invention may be provided with a removal unit for removing metallic foreign matter, which is selectively adhered to the conductive roll surface and adhered to the conductive roll surface, and the metallic foreign material removed by the removal unit. And a collecting unit for collecting, and a moving unit for moving the main base provided with each of the components in the width direction of the conductive roll.

Preferably, the removing unit is made of an electromagnet capable of attaching a metallic foreign material by using magnetic force, and may include an adhesion means for selectively attaching the electromagnet to the conductive roll surface.

In addition, the collection processing unit may include a brush and a brush operating means for wiping the surface of the electromagnet, the discharge means for collecting and discharging metallic foreign matter dropped off the surface of the electromagnet by the brush.

In addition, the moving part is preferably moved in the conductive roll width direction. To this end, it may include a guide bar installed in the width direction of the conducting roll, and a driving means for moving the case that is slidably installed in the guide bar along the guide bar.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a state in which a foreign matter processing apparatus according to the present invention is installed on a conductive roll, FIG. 2 is a configuration diagram of a foreign matter processing apparatus according to the present invention, and FIG. The combined perspective view.

According to the drawings, the present invention is selectively attached to the surface of the conductive roll 150, the removal unit for removing the metallic foreign matter on the surface of the conductive roll 150, and collecting the metallic foreign matter removed by the removal unit And a collecting unit for moving the main base 20 provided with the respective components in the width direction of the conductive roll 150.

First, the moving part, the support frame 10 is installed in the width direction on the upper portion of the conductive roll 150, the transfer screw 11 is installed on the support frame 10 and placed in the width direction of the conductive roll 150, It is connected to the tip of the transfer screw 11 is engaged with the main motor 12, the transfer screw 11 for rotating the transfer screw 11, is moved in the width direction of the conductive roll 150, the removal portion and the collection processing portion at the top It includes a main base 20 to be installed.

The side cover 21 and the upper cover 22 are further installed on both sides and the top of the main base 20 to cover and protect the removal unit and the collection processing unit located inside the main base 20.

In addition, a sensor 25 for detecting metallic foreign matter is further installed below the main base 20.

In the installation of the transfer screw 11 and the main base 20, the guide bar 13 is installed to the left and right sides of the transfer screw 11, and three brackets 23 are attached to the lower end of the main base 20. The center bracket of each bracket 23 is machined into a female screw hole so as to engage with the transfer screw 11, and to form a hole in both brackets so that the guide bar 13 is inserted.

Here, according to one embodiment of the present invention, the respective moving parts are positioned with respect to the left and right edge portions of the strip 200 to perform foreign matter removal operations. For this purpose, the left and right sides of the conductive roll 150 are centered. Opposite each of the transfer screw 11 and the main base 20 is installed, and each main base 20 is also equipped with a removal unit and the collection processing unit to perform a separate foreign matter removal operation.

Then, the removal unit is applied to the electromagnet 30 and the electromagnet 30 for dropping the metallic material attached to the surface of the conductive roll 150 by magnetic force, and selectively move the electromagnet 30 to the surface of the conductive roll 150 and the collecting treatment unit. It includes a contact means for.

Electromagnet 30 has a cylindrical shape and the outer surface is provided with a coating tube 31 of rubber material to prevent friction when contacting the conductive roll 150.

The close contact means is a fixed bar 32 connected to the tip of the electromagnet 30, the guide roll 33 is installed on one side of the fixed bar 32, the guide groove 34 so that the guide roll 33 is seated on the side Is formed and is installed extending from the conduction roll 150 toward the collecting treatment portion guide member 35, the fixing bar 32 is guided guide, installed on the main base 20 and connected to the fixing bar 32 fixed bar ( 32) drive means for moving.

The drive means is connected to the driving cylinder (41) installed on the upper frame of the main base 20, the piston rod end of the driving cylinder 41, the rack bar 42 is formed on the upper rack 43, the upper base main 20 The rack bar guide 44 fixed to the frame to guide both sides of the rack bar 42, the small gear 45 engaged with the rack of the rack bar 42, and the small gear 45 are coupled to the same shaft and gear ratio. Is a relatively large air gear 45 ', the rack 47 coupled to the top of the fixed bar 32 by a hinge axis and extending below the air gear 45' and engaged with the air fish 45 'on the top surface. It is formed and the operating member 46, the guide groove 48 is formed on the side, the main base 20 is installed in the lower end of the upper frame and placed in the guide groove of the operating member 46 to support the supporting member 46 ( 49).

Therefore, when the driving cylinder 41 is stretched and operated, the small gear 45 and the standby gear 45 'engaged with the rack bar 42 are rotated to push the operation member 46 engaged with the standby gear 45'. The fixed bar 32 is moved along the guide member 35 so that the electromagnet 30 installed on the fixed bar 32 is moved between the surface of the conductive roll 150 and the collecting treatment unit.

The removal unit further includes a switch means for applying / blocking power to the electromagnet 30 according to the position of the electromagnet 30.

The switch means is a non-conductor 36 is installed on the upper end of the collecting processing unit side of the guide member 35, the conductor 37 is installed on the entire remaining upper end and connected to the power line, and the fixing bar 32 is installed on one side of the guide The power brush 38 is in close contact with the upper portion of the member 35, the power brush 38 and the power cable 39 for connecting the electromagnet 30.                     

Therefore, the switch means when the fixed bar 32 is moved to the end of the guide member 35 is located in the collection processing unit, the power brush 38 is in contact with the non-conductor 36, to cut off the power applied to the electromagnet 30 It becomes possible.

Looking at the installation structure of the removal unit is as follows.

A cylindrical rubber cladding tube 31 having a large outer diameter is fitted and fixed to the cylindrical electromagnet 30 by one end, and a spring-shaped elastic member 51 is attached to one side of the electromagnet 30 and is elastic member. The other side of the 51 is attached to the connecting table 52 is fixed to the fixing bar 32 via the hinge axis.

The guide groove 34 is also curved along the side of the curved guide member 35, and the conductor 37 and the non-conductor 36 are attached to the upper portion of the guide member 35, and the forge of the guide member 35 is formed. The front end of the processing unit is fixed to the side cover 21 by a fixed shaft.

In addition, the operating member 46 and the guide groove 48 formed in the operating member 46 are also curved in the form of an arc, and are connected by the upper end of the fixing bar 32 and the hinge shaft.

The support roll 49 seated in the guide groove 48 of the operation member 46 is rotatably installed on the bracket 50 attached to the lower center portion of the main base upper frame 40 by a fixed shaft.

Metallic foreign matter detection sensor 25 is fixed to the lower end of the main base (20).

On the other hand, the collection processing unit is supported by the support base 60 is fixed to the main base 20, the idle roll 61 is installed along the support 60, the rotating cylinder 62 is rotatably installed, the rotating cylinder A circular tube 63 inserted into the 62, a circular brush 63 fixed in the circular tube 63, the annular brush 64 is inserted into the center portion is fixed to the inside of the end of the rotary tube 62 Rotating blade (65), rotary blade (66) installed at the center of the rotating plate (65) and extending rearward, radial bearing (68) fixed to the inner flange of the end of the rotating cylinder (62), A fixed gear 69 fastened to the end of the rotary cylinder 62 to fix the radial bearing 68 and attached to the outer side of the fixed cap 69 and the fixed cap 69 having a through hole formed in the center thereof, and having a through hole formed in the center thereof. (70), the drive gear (71) and the driving motor (72) engaging with the driven gear (70) and the driven gear (70) and the through hole of the fixed cap (69) Air Lady installed on the chukgwan 73 fixed to the inner surface Earl bearing 68, chukgwan 73 tip includes a trapping means for trapping foreign matter is discharged.

The collecting means is installed at the lower end of the filter case 80, the filter case 80 is installed through the filter case 80, the filter case 80 is connected to the end of the shaft tube 73, the filter case 80, the filter ( It comprises a collection box 83 for receiving the foreign matter filtered in 82, the discharge pipe 85 is installed on the rear end of the filter case (80).

The installation structure of the collection processing unit will be described below.

The rotating cylinder 62 having a cylindrical shape and an inner diameter different from each other is fixed by a support 60 fixed in a form in which an idle roll 61 is inserted into an upper end of the main base 20.

The support 60 is installed vertically to the left and right sides of the rotary cylinder 62, each bent in an arc shape as the rotary cylinder 62, the idle roll 61 is installed on the upper and lower portions of the support 60, respectively. The place where the idle roll 61 of the outer circumferential surface of the rotating cylinder 62 is placed is stepped inward so that the idle roll 61 is guided.

A cone-shaped induction pipe 73 that opens outwardly is fixed to the front end mouth of the rotary cylinder 62, and the inner and outer diameters of the rotary cylinder 62 are circular tubes having different front and rear diameters with brushes 64 attached to the inner side thereof. 63) is inserted and fixed.

On the inside of the rear end of the rotating cylinder 62, a rotating plate 65 is attached to which the rotary blade 66 is connected by the shaft 67 and the fixing nut, and the radial bearing 68 is the rotating cylinder 62 on the outside. And the inner circumferential surface is supported by the shaft tube 73 to allow the rotating cylinder 62 to rotate freely with respect to the shaft tube 73.

An end of the shaft tube 73 is attached to the annular connecting plate and the discharge tube 85 is also attached to the annular connecting plate and each connecting plate is fastened with bolts on both sides of the filter case 80. The bottom of the filter case 80 is formed with a groove through which the collection box 83 is slid out. The collection box 83 is built in, and the magnet 84 is attached to the bottom of the collection box 83 so that metallic foreign matter is attached. Is installed.

The discharge tube 85 penetrates the rear vertical surface of the main base 20 and protrudes out of the main base 20.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 4, 5, and 6.

Each main motor 12 installed on the left and right sides on the support frame 10 is individually operated to rotate the transfer screw 11 installed on the left and right sides with respect to the center of the conductive roll 150. Therefore, the main base 20 engaged with the transfer screw 11 reciprocates along the transfer screw 11 to the left and right sides of the conductive roll 150.                     

As the main base 20 moves along the surface of the conducting roll 150, the sensor 25 installed below the main base 20 scans the surface of the conducting roll 150, and in this process, the surface of the conducting roll 150. If the metal dust or metal chip is buried in the sensor 25 will be detected.

When a metallic foreign matter is detected by the sensor 25, the main motor 12 stops according to a signal from the sensor 25 to stop the main base 20 at the position where the foreign matter is detected, and continuously removes the metallic foreign matter. Let's go.

When the main base 20 is stopped, the driving cylinder 41 installed on the main base 20 is moved forward to advance the rack bar 42 connected to the piston rod end. The rack bar 42 is supported by the rack bar guide 44 to move forward.

As the rack bar 42 moves forward, the small gear 45 meshed with the rack on the upper rack bar 42 and the standby gear 45 'fixed coaxially to the small gear 45 rotate in the same direction. As the gear 45 'is rotated, the operation member 46 engaged with the rack via the standby gear 45' is moved toward the conductive roll 150.

Therefore, the fixed bar 32 installed at the tip of the operating member 46 moves along the guide member 35 while being pushed out as the operating member 46 moves, and the electromagnet 30 installed at the fixed bar 32 is As the fixed bar 32 moves, it comes out of the rotating cylinder 62.

Here, the guide member 35 is curved to approach the conductive roll 150 from the rotating cylinder 62 side, so that the fixed bar 32 moved along the guide member 35 continues to be closer to the conductive roll 150. When the fixing bar 32 reaches the end of the guide member 35, the electromagnet 30 installed on the fixing bar 32 is in close contact with the surface of the conductive roll 150.

At this time, the power is automatically applied to the electromagnet 30 during the movement of the fixing bar 32 to magnetize the electromagnet 30, that is, as shown in FIG. 4 before the fixing bar 32 moves. The power brush 38 installed on the bar 32 is placed on the non-conductor 36 installed on the guide member 35, so that the power applied to the electromagnet 30 is cut off, and the fixed bar 32 Is moved and advanced along the guide member 35, the power brush 38 installed on the fixed bar 32 is also moved along the upper portion of the guide member 35, out of the region of the non-conductor 36 to the conductor 37 area. Will move.

Therefore, the external power source connected to the conductor 37 is applied to the power brush 38 in contact with the conductor 37 is sent to the electromagnet 30 through the power cable 39 installed on the fixed bar 32 to magnet the electromagnet 30 It will become possible.

As such, the fixed bar 32 moves to the surface of the conductive roll 150 and at the same time the electromagnet 30 is operated. The electromagnet 30 in close contact with the surface of the conductive roll 150 is magnetically applied to the surface of the conductive roll 150. The metallic foreign matter is attracted and removed from the conductive roll 150.

Here, the elastic member 51 installed between the electromagnet 30 and the fixed bar 32 absorbs the shock generated while the electromagnet 30 is elastically bent while being in close contact with the conductive roll 150, and the electromagnet ( 30) The rubber coating tube 31 fitted to the surface can prevent damage caused by the impact of the conductive roll 150 and the electromagnet 30.

The rubber cladding tube 31 has a thickness such that the magnetic force from the electromagnet 30 can be sufficiently applied to the surface of the conductive roll 150, and the metallic foreign material dropped from the surface of the conductive roll 150 by the magnetic force is the coated tube 31. Will stick to the surface.

As described above, when the metallic foreign matter is removed by the electromagnet 30 in contact with the surface of the conductive roll 150, and the metallic foreign matter is not detected by the sensor 25 installed in the main base 20, a predetermined time elapses by a timer or the like. Then, the electromagnet 30 is returned to its original position and enters the inside of the rotating cylinder 62, and then the collection process of the metallic foreign matter removed by the electromagnet 30 is performed.

Looking at the collection of metallic foreign matters, when the drive cylinder 41 is contracted and operated, the operating member 46 which is engaged with the air gear 45 'while the rack bar 42 moves backward along the rack bar guide 44 is also supported by the support roll 49. Will be guided back.

Therefore, the fixed bar 32 installed on the operating member 46 is moved along the guide member 35 curved toward the rotary cylinder 62 to move the electromagnet 30 installed on the fixed bar 32 inside the rotary cylinder 62. Is pushed to.

When the fixed bar 32 is moved to the end of the guide member 35 so that the electromagnet 30 enters the inside of the rotary cylinder 62 completely, the power brush 38 installed in the fixed bar 32 is located in the conductor 37 region. The power applied to the electromagnet 30 is cut off by moving to the non-conductor 36 area, and thus, the non-magnetized electromagnet 30 causes the metallic foreign matter that adhered to the cover tube 31 by the magnetic force of the electromagnet 30. Drop out at (31).

On the other hand, at the same time as the completion of the reverse operation of the drive cylinder 41, the drive motor 72 is operated to rotate the rotary cylinder 62.

That is, when the drive motor 72 is operated, power is transmitted through the drive gear 71 installed on the rotation shaft of the drive motor 72 and the driven gear 70 meshed with the drive gear 71 to drive the driven gear 70. Is provided that the rotating cylinder 62 is rotated.

As the rotating cylinder 62 rotates, the brush 64 fixed to the rotating cylinder 62 is rotated to sweep the surface of the covering tube 31 of the electromagnet 30 inserted into the brush 64 so as to still cover the covering tube ( 31) It will shake off the metallic foreign matter attached to it.

The metallic chips and metallic dust are removed from the cover tube 31 by the brush 64 and the metallic foreign substances dropped by the rotary blade 66 rotating together with the rotary cylinder 62 are sent to the rear of the rotary cylinder 62. do.

That is, the rotary blade 66 is connected to the rotary cylinder 62 and the shaft fixed to the rotary cylinder 62, so that when the rotary cylinder 62 is rotated to rotate in the same direction in the shaft tube 73. .

Accordingly, the metallic foreign matter dropped from the covering tube 31 by the brush 64 is moved toward the shaft tube 73 along the air flow generated by the rotary blade 66 and is connected to the shaft tube 73. Flows inside.

The air flow containing the metallic foreign matter is discharged through the discharge pipe 85 at the rear through the filter case 80, in the process, the metallic foreign matter is filtered by the filter 82 installed in the filter case 80, the filtered The metallic foreign matter is collected and dropped into the collection box 83 located below the filter 82. A magnet 84 is attached to the bottom of the collection box 83 to facilitate the collection of metallic foreign matter.

On the other hand, the electromagnet 30 is inserted into the rotary cylinder 62 and at the same time the main motor 12 is restarted to reciprocate the main base 20 along the feed screw 11, the main base 20 The installed sensor 25 continues to detect the metallic foreign matter on the surface of the conductive roll 150, and the metallic foreign matter collecting operation is continuously performed in the main case 80 as described above during the detecting operation.

According to the conductive roll surface foreign matter treatment apparatus of the plated steel sheet manufacturing process according to the present invention as described above, it is possible to effectively remove the metallic foreign matter adhering to the surface of the conductive roll, which is generated in the plated steel sheet by metallic dust and metal chips It is effective in preventing dents and bending defects, thereby improving product quality.

In addition, the mechanical removal of the metallic foreign matter has the advantage of reducing the time and effort required for the removal operation.

Claims (5)

A removal unit for removing metallic foreign matter on the surface of the conductive roll, including an electromagnet selectively adhered to the surface of the conductive roll, and an adhesive means for bringing the electromagnet into close contact with the surface of the conductive roll; A collection processing unit for processing the metallic foreign matter removed by the removal unit, including a collecting means for collecting and discharging the metallic foreign matter dropped from the surface of the electromagnet by the brush; A guide bar installed in the width direction of the conductive roll, a main base on which each component is installed and slidably installed along the guide bar, and a driving means for moving the main base; part Conductive roll surface foreign matter treatment apparatus of the plated steel sheet manufacturing process comprising a. According to claim 1, The close means is a fixed bar connected to the electromagnet tip is installed, a guide roll is installed on one side of the fixed bar, a guide groove is formed to be seated on the side of the guide roll is formed extending from the conduction roll toward the collecting treatment unit Guide member guided by the fixed bar, the guide base is installed on the main base, the conductive roll surface foreign matter treatment apparatus of the plated steel sheet manufacturing process characterized in that it comprises a drive means for moving the fixed bar is connected to the fixed bar. According to claim 2, The drive means is a drive cylinder installed in the main base upper frame, a rack bar connected to the front end of the piston rod of the drive cylinder, the rack is formed on the upper, fixed to the main base upper frame to support both sides of the rack bar The guide rack bar guide, the small gear engaged with the rack of the rack bar, and the gear that is coupled to the same shaft and the gear ratio is relatively large, coupled to the hinge axis on the top of the fixed bar, extending below the standby gear The conductive roll surface of the plated steel sheet manufacturing process including a working member having a rack engaged with the air gear and having a guide groove formed at a side thereof, and a support roll installed at the bottom of the upper frame of the main base and placed in the guide groove of the operating member to support the operating member. Foreign body disposal device. According to claim 3, The non-conductor is installed on the upper end of the collecting processing portion of the guide member, the conductor is installed on the remaining upper end, the power line is connected to the fixing bar is installed on one side is in close contact with the upper guide member and connected to the electromagnet Conductive roll surface foreign matter treatment apparatus of the plated steel sheet manufacturing process including a power brush, further comprising a switch means for applying / blocking the power to the electromagnet according to the position of the electromagnet. According to claim 1, The collection processing unit is a support fixed to the main base, a rotating cylinder which is rotatably installed supported by the idle roll installed along the support, a brush fixed in the rotating cylinder and the electromagnet is inserted into the center, Rotating plate fixed inside the end of the rotating cylinder, rotary blade installed on the central axis of the rotating plate, radial bearing fixed to the inner flange of the rotating end, fastened to the end of the rotating cylinder to fix the radial bearing and through hole The fixed cap is formed on the outer surface of the radial bearing by being inserted through the through-hole of the driven gear and the driving motor, the driven gear and the fixed cap, which are attached to the fixed cap and attached to the outer surface of the fixed cap, and have a through hole formed at the center thereof. A fixed shaft tube, a filter case connected to the end of the shaft tube and having a built-in filter inside, and installed at the bottom of the filter case to filter Conductive roll surface foreign matter treatment apparatus of the plated steel sheet manufacturing process comprising a collection box for receiving foreign matter.

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