KR101245691B1 - Coating solution supplying device of electrical steel sheet coating utility - Google Patents

Abstract

The present invention relates to a solution supply device for electrical steel coating equipment, the strip (S) is located in the upper portion of the path that proceeds to the container-shaped aqueous solution storage tank 10 for storing the magnesium oxide aqueous solution 20, and the aqueous solution A pair of crushing rolls 30 are disposed on the inner upper portion of the reservoir 10 and installed to pour the magnesium oxide aqueous solution 20 upward while being engaged with each other and rotated by a driving motor, and one end thereof is magnesium oxide. The aqueous solution 20 is connected to the upper end of the aqueous solution reservoir 10 that overflows and has a downward slope along the traveling direction of the strip S, the other end is located on the upper surface of the strip S and the strip S The end portion is characterized in that it comprises a guide plate 40 formed with a continuous groove 46 along the width direction of the strip (S).

Steel sheet, magnesium oxide, coating, crushing, filter

Description

Coating solution supplying device of electrical steel sheet coating utility

1 is a schematic configuration diagram showing a general electrical steel coating equipment;

Figure 2 is a detailed view of the main portion of Figure 1 showing a solution supply apparatus of a conventional electrical steel coating equipment;

3 is a drawing of a problem of the prior art;

Figure 4 is a schematic configuration diagram showing a solution supply device of the electrical steel coating equipment according to the present invention;

5 is a detailed view of main parts of the present invention.

[Description of Reference Numerals]

10: aqueous solution reservoir 12: filter

20: magnesium oxide solution 30: crushing roll

40: guide plate 42: extension part

44: projection 46: groove

50: supply pipe 60, 62: ringer roll

61, 63: home 70: fan

S: strip

The present invention relates to a solution supply apparatus for an electrical steel coating apparatus, and more particularly, to a solution supply apparatus for an electrical steel coating apparatus capable of uniformly supplying a coating solution to the surface of an electrical steel sheet.

In general, a grain-oriented electrical steel sheet is performed on a thin strip having a thickness of about 0.262 to 0.350 mm, and the thin strip is coated with an aqueous magnesium oxide solution after annealing and decarburizing.

1 and 2 schematically show an electrical steel coating apparatus, i.e., an apparatus for coating an aqueous magnesium oxide solution.

The spray nozzle 110 for supplying the magnesium oxide aqueous solution 120 is installed at the upper part of the path through which the thin strip S travels, and the amount of the magnesium oxide aqueous solution 120 supplied through the spray nozzle 110 is a valve. Controlled by 112.

The upper and lower ringer rolls 130 and 132 which are rotated in the upper and lower portions of the strip S are installed at a predetermined distance away from the spray nozzle 110 in the direction in which the strip S travels. The ringer rolls 130 and 132 allow the magnesium oxide aqueous solution 120 supplied from the spray nozzle 110 to be uniformly coated on the surface of the strip S. In addition, the surface of the upper and lower ringer rolls (130, 132) is continuous in the circumferential direction and evenly spaced apart at regular intervals along the longitudinal direction to evenly disperse the aqueous magnesium oxide solution (120) on the front surface of the strip (S) Arranged grooves 131 and 133 are formed.

And, the lower portion of the lower ringer roll 132 is installed with a fan 140 containing the magnesium oxide solution 120, the magnesium oxide solution 120 contained in the fan 140 is buried in the lower ringer roll 132 It is coated on the bottom of the strip (S).

However, the conventional magnesium oxide aqueous solution supply configuration, in particular, the configuration for supplying the magnesium oxide aqueous solution to the upper portion of the strip (S) causes the following problems.

First, the solid material contained in the magnesium oxide aqueous solution cannot be removed, and the solid material is fixed to the groove on the surface of the Ringer's roll.

Next, the aqueous magnesium oxide solution is not uniformly distributed over the entire surface of the strip, such as a thick coating at the center of the strip, which is near the outlet of the spray nozzle, and a thin coating at both edges of the strip.

In addition, when the flatness of the strip is poor, bubbles are generated in the magnesium oxide aqueous solution, and these bubbles adhere to the surface of the ringer roll.

If a solid material or bubbles are attached to the surface of the ringer roll or the magnesium oxide solution is not uniformly applied over the entire surface of the strip, as shown in FIG. The file film defect 150 was generated, such as adversely affecting the quality of the strip.

Accordingly, the present invention is to solve the above-mentioned problems, the solution of the electrical steel coating equipment configured to be uniformly applied to the entire surface of the strip of magnesium oxide aqueous solution after removing the solid material contained in the magnesium oxide aqueous solution The purpose is to provide a feeder.

Another object of the present invention is to provide a solution supply apparatus for an electrical steel coating apparatus, which is configured to improve the coating quality of a strip by preventing bubbles from occurring in an aqueous magnesium oxide solution supplied to the strip even when the flatness of the strip is poor. There is this.

As a technical configuration for achieving the above object, the present invention, in the solution supply device of the electrical steel sheet coating equipment for supplying the magnesium oxide aqueous solution to the surface of the strip, located in the upper portion of the path through which the strip proceeds, the magnesium oxide aqueous solution A container-shaped aqueous solution storage tank for storing a, and a pair of crushing rolls disposed on the inner upper portion of the aqueous solution storage tank and installed to pour the magnesium oxide aqueous solution to the top while rotating to interlock with each other, and one side rotationally driven by a drive motor, An end is connected to the top of the aqueous reservoir in which the magnesium oxide aqueous solution overflows and has a downward slope along the direction of travel of the strip, the other end being positioned on the upper surface of the strip and at the end of the strip continuous along the width direction of the strip. Electrical steel sheet comprising a guide plate formed with a groove The floating equipment according to the solution supply maryeonham.

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

Figure 4 is a schematic configuration diagram showing a solution supply apparatus of the electrical steel coating equipment according to the present invention, Figure 5 is a detailed view of the main part of the present invention.

At the top of the path through which the thin strips S travel, a container-shaped aqueous solution storage tank 10 for storing the magnesium oxide aqueous solution 20 is located.

A pair of crushing rolls 30 interlocked with each other is installed at an inner upper portion of the aqueous solution storage tank 10, and these crushing rolls 30 have the magnesium oxide aqueous solution 20 stored in the aqueous solution storage tank 10 upward. Simultaneously with the raising, it is installed to have a structure for crushing the solid material contained in the magnesium oxide aqueous solution 20. In addition, the crushing roll 30 is connected to a driving motor (not shown) and driven to rotate.

As an example, the upper and lower portions of the aqueous solution storage tank 10 are blocked from each other by the crushing rolls 30. On the outer circumferential surface of the crushing rolls 30, concave-convex portions are formed along the circumference, respectively, and crushed on both sides. As the uneven parts of the roll 30 are installed to be engaged with each other, when the crushing roll 30 is rotated, the magnesium oxide aqueous solution 20 is spread upward through the space between the uneven parts and at the same time included in the magnesium oxide aqueous solution 20. Solid materials may be broken.

In addition, a filter 12 positioned above the crushing roll 30 is installed in the aqueous solution storage tank 10, and the filter 12 is a magnesium oxide solution spread by the crushing rolls 30. By filtering and removing foreign substances such as small particles contained in (20), only the magnesium oxide aqueous solution 20 suitable for coating is present on the top of the filter 12.

Guide plate for guiding the magnesium oxide aqueous solution 20, which has been pumped to the upper side of the filter 12 in the upper end side of the aqueous solution reservoir 10, that is, the upper end of the end of the direction of the strip (S) toward the strip (S) 40 is installed, the guide plate 40 has a continuous shape from the top of the aqueous solution reservoir 10 to a portion adjacent to the upper surface of the strip (S).

In addition, the guide plate 40 is installed in a form having a downward slope with respect to the traveling direction of the strip (S) so that the magnesium oxide aqueous solution 20 on the guide plate 40 is naturally moved toward the strip (S) by gravity It has a configuration.

In addition, the strip (S) side end portion of the guide plate 40 has a branched shape in two branches, and the portion branched toward the upper portion of the guide plate 40 extends the extended portion 42 while the guide plate 40 maintains a straight cross-sectional shape. The portion branched toward the lower portion forms a protrusion 44 protruding toward the strip S to have an acute angle with the guide plate 40, and a groove 46 is provided between the extension portion 42 and the protrusion 44. .

In this case, the distance between the end of the extension portion 42 and the strip S and the distance between the end of the protrusion 44 and the strip S may be formed to be substantially the same, or the former may be slightly smaller than the latter. .

Of course, the extension part 42, the protrusion 44, and the groove 46 are continuously formed in the width direction of the guide plate 40, that is, in the width direction of the strip S.

The aqueous solution storage tank 10 is connected to supply the magnesium oxide aqueous solution 20 through the supply pipe (50).

And, at a position away from the guide plate 40 in the direction of travel of the strip (S), the upper and lower portions of the strip (S), the lower ringer rolls (60) and (62) 62 are installed. The lower ringer rolls 60 and 62 allow the magnesium oxide aqueous solution 20 supplied from the guide plate 40 and the fan 70 described later to be uniformly coated on the surface of the strip S. In addition, the surface of the upper and lower ringer rolls (60) and (62) is continuously circumferentially and evenly spaced apart at regular intervals along the longitudinal direction to evenly disperse the aqueous magnesium oxide solution (20) on the front surface of the strip (S). Arranged grooves 61 and 63 are formed.

And, the lower portion of the lower ringer roll 62 is installed with a pan 70 containing a magnesium oxide solution 20, the magnesium oxide solution 20 contained in the pan 70 is buried in the lower ringer roll 62 It is coated on the bottom of the strip (S).

The operation of the present invention having such a configuration will be described.

In order to supply the magnesium oxide aqueous solution 20 to the surface of the strip S, the crushing rolls 30 are rotated, and the crushing rolls 30 rotate with each other while rotating the magnesium oxide aqueous solution 20 of the aqueous solution storage tank 10. Scoop up from the top.

At this time, the solid material contained in the aqueous solution storage tank 10 which is spread upward through the crushing rolls 30 is crushed by the crushing rolls 30 and crushed finely.

Then, the magnesium oxide aqueous solution 20, which is spread upward by the crushing rolls 30, passes through the filter 12, and after the fine solid matter and other foreign substances included in the magnesium oxide aqueous solution 20 are removed. It overflows and flows down the strip S along the top surface of the guide plate 40.

Thus, a clean aqueous magnesium solution 20 suitable for coating is supplied to the upper surface of the strip S.

The magnesium oxide aqueous solution 20 supplied to the upper surface of the strip S is evenly distributed over the entire surface of the strip S by the end of the guide plate 40 formed long in the width direction of the strip S.

Particularly, the present invention applies the magnesium oxide aqueous solution 20 to the upper surface of the strip S in two steps. First, the upper surface of the strip S is around the end of the guide plate 40, in particular the groove 46. The magnesium oxide aqueous solution 20 maintained by surface tension at the site | part is apply | coated primarily to the upper surface of the strip S, and the magnesium oxide aqueous solution 20 which flowed down along the guide plate 40 continuously of the strip S is carried out. It is applied secondary to the top surface.

When the magnesium oxide solution 20 is applied to the upper surface of the strip S in two steps, it is possible to secure a sufficient reaction time between the strip S and the magnesium oxide solution 20 to prevent pore generation. Of course, the magnesium oxide aqueous solution 20 existing inside the groove 46 continuous in the width direction of the strip S is evenly applied over the width direction of the strip S to improve the coating quality.

Of course, the magnesium oxide aqueous solution is uniformly applied to the lower surface of the strip (S) by the lower ringer roll 62.

According to the solution supply apparatus of the electrical steel coating equipment according to the present invention as described above, the solid matter and foreign matter contained in the magnesium oxide solution is removed and supplied to the surface of the strip in a clean state, the magnesium oxide solution is the upper surface of the strip It is supplied in two stages to ensure sufficient reaction time between the magnesium oxide solution and the strip, and the magnesium oxide solution is maintained evenly in the width direction of the strip, especially the magnesium oxide solution maintained at the surface tension in the groove formed at the end of the strip side of the guide plate. The coating has an excellent effect of improving the coating quality.

Claims (3)

In the solution supply apparatus of the electrical steel coating equipment for supplying the magnesium oxide solution to the surface of the strip, An aqueous solution storage tank 10 having a container shape for storing the magnesium oxide aqueous solution 20 and positioned at an upper portion of a path through which the strip S travels, A pair of crushing rolls 30 disposed on an inner upper portion of the aqueous solution storage tank 10 and installed to pour the magnesium oxide aqueous solution 20 upward while being engaged with each other and rotating by a driving motor; One end is connected to the upper end of the aqueous solution reservoir 10 in which the magnesium oxide aqueous solution 20 overflows and has a downward slope along the traveling direction of the strip S, and the other end is located on the upper surface of the strip S. And the strip (S) side end solution supply apparatus of the electrical steel coating equipment, characterized in that it comprises a guide plate 40 is formed with a continuous groove 46 in the width direction of the strip (S). According to claim 1, characterized in that it further comprises a filter (12) installed on the upper portion of the aqueous solution reservoir 10 to remove the foreign matter contained in the magnesium oxide aqueous solution is pumped up by the crushing roll (30) Solution supply device for electrical steel coating equipment. The groove 46 is formed by an extension part 42 forming the strip end of the guide plate 40 and a protrusion 44 protruding downward from the strip end of the guide plate 40. Solution supply device for electrical steel coating equipment.

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