KR100431599B1 - Apparatus for deleting bubbles formed in coating bath for non-oriented electrical steel strip - Google Patents

Abstract

The present invention is a non-oriented structure configured to effectively improve the coating quality and cost reduction by effectively separating and breaking the bubbles generated in the coating solution when the insulating coating on the surface of the non-oriented electrical steel sheet to recover and reuse the broken solution It relates to a bubble removing device of the electrical steel coating solution.

The present invention proceeds in one direction by the driving roll 12 and the driven roll (19) on one side of the solution reservoir (1) and a plurality of buckets 15 are formed integrally by placing at a predetermined interval on the outer surface portion thereof In the position adjacent to the driven end of the driven roll 19 side of the rubber belt 14 is provided with a rubber belt (14) provided, the drive parpo roll (17) and the driven parpo roll (18) in the form of a helical gear rotating in engagement with each other. And a foam detecting sensor 11 in place in the solution storage tank 1 in which the rubber belt 14 is installed, but the variable motor for rotating and driving the foam detecting sensor 11 and the driving roll 12. (13) and the motor (16) for driving the drive parpo roll 17 to provide a foam removing device of the non-oriented electrical steel coating solution, characterized in that the configuration by electrically connecting and installed in the control unit 10.

Description

Defoamer of non-oriented electrical steel coating solution {APPARATUS FOR DELETING BUBBLES FORMED IN COATING BATH FOR NON-ORIENTED ELECTRICAL STEEL STRIP}

The present invention relates to an apparatus for continuously separating and breaking a solution foam generated in a coating solution during coating operation of a non-oriented electrical steel sheet and recovering and reusing the broken solution.

Non-oriented electrical steel sheets used as iron core materials for electric equipment such as rotary machines and small transformers are provided on demand after forming an insulating film on the surface to suppress eddy currents and minimize power loss. Coil-oriented non-oriented electrical steel sheet supplied to demand is usually used for forming a series of iron cores such as high-temperature heat treatment, automatic lamination, welding, etc. for the purpose of punching, stress relief annealing, etc. Used after being applied. Therefore, the coating process of forming an insulating film on the surface of the electrical steel sheet is a very important process considering that the coating process is a finishing process to finally provide the electrical steel sheet products to the consumer.

Conventional coating equipment for the insulation coating of the non-oriented electrical steel sheet as shown in Figure 1, Figure 2 is a settling roll (2) and the settling roll is installed so that a certain portion is locked in the solution reservoir (1), It consists of a structure including the transfer roll 3 which apply | coats a coating solution to the steel plate strip 4, rotating contacting with (2).

The coating thickness required for non-oriented electrical steel sheet is usually 0.05 ~ 0.10 mils (1/1000 inch), and the surface quality is beautifully coated with uniform coating thickness, so foaming of the coating solution is possible during the corning process. It should be kept stable in a restrained state.

The principle of foaming in the coating solution (6) during the coating operation is mainly due to the droplets falling between the surfactant contained in the solution component and the precipitation roll (2) and the transfer roll (3), the resulting solution foam (5) rises to the upper part of the solution, and is blown and solidified by contact with air, so that the coagulation material remains in the solution.

In this way, the solution coagulation substance remaining in the solution is applied to the surface of the strip 4 to generate spots, and the thickness of the coating becomes thick, which causes a decrease in quality.

Conventionally, in order to solve the above problems, a method of installing a blower on the side of the solution storage tank 1 to force the bubbles generated by the air flow from the blower was used. However, this case has a problem that the bubbles are scattered on the surface of the plate, causing extra surface coating defects. Therefore, a fundamental problem solution for the treatment of bubbles generated in the coating solution during the coating process is required. It is true.

Therefore, an object of the present invention is to provide a device that can further improve the coating quality and bring cost reduction effect by effectively and quickly removing the solution bubbles generated in the coating solution during the insulation coating operation of the non-oriented electrical steel sheet.

1 is a schematic view showing a conventional insulation coating equipment,

2 is a side cross-sectional view of FIG.

3 is a perspective view showing the installation configuration of the apparatus according to the present invention;

4 is a side cross-sectional view of FIG. 3;

5 is a detailed view of a sensor in the device of the present invention.

** Explanation of symbols for main parts of the drawing **

1 Solution reservoir 2 Precipitation roll 3 Transfer roll

4: strip 5: solution foam 6: coating solution

8: solution supply line 9: solution discharge line 10: control unit

11: foam sensor 12: drive roll 13: variable motor

14: rubber belt 15: bucket 16: motor

17: driving paroroll 18: driven paroroll 19: driven roll

20: tow tray 21: solution receiving 22: solution supply tank

23: pump

Hereinafter, the present invention for achieving the above object will be described in detail with reference to the accompanying drawings.

According to the present invention, a rubber belt 14 which continuously collects the floating bubbles 5 generated in the upper part of the coating solution 6 during the coating operation for the non-oriented electrical steel sheet and transfers them between the driving Papo roll 17 and the driven Papo roll 18. 3, 4, a plurality of buckets 15 are placed on the rubber belt 14 in a state inclined to the front, and the rubber belt 14 is disposed. Both ends are supported by a driving roll 12 connected to the variable motor 13 and a driven roll 19 fixed to the traction table 20, and the rubber belt 14 has a lower portion of the foam 5 ) It is disposed on one side of the solution reservoir (1) in contact with the top.

The driving paroroll roll 17, which is operated by the motor 16, is installed at one side arranged in this way, and the driving paroroll roll 17 is rotatable in the tow table 20 fixedly installed in the solution reservoir 1 horizontally. Shaft is installed.

The driven paro rolls 18, which are installed in pairs with the driving paro rolls 17, are rotatably mounted on the retractable base 20 to be horizontally engaged with the drive paro rolls 17, and the driven rolls 19 And is spaced apart at regular intervals.

At the bottom of the driven paro roll 18 and the driving paro roll 17, a solution receiver 21 for receiving a solution generated by foaming bubbles is installed, and the foam receiver 21 is connected to a solution supply tank 22. The solution discharge line 9 is installed.

One side of the solution storage tank (1) installed in this way is provided with a foam sensor (11), the foam sensor 11 is installed to be located above the solution in the solution storage tank (1), the example of FIG. As described above, the shaft bar 27 which is lifted and lowered by the floating port 26 is installed in the cylindrical case 25 with the lower part open, and the sensor 28 is attached to the upper part.

When the bubble 5 increases in the upper portion of the solution and the bubble sensor 11 is operated, the controller 10 drives the variable motor 13 counterclockwise on the drawing by the inputted information, and at the same time, the motor 16 Drive clockwise to enter defoaming operation. After the bubble 5 is reduced and the level is normally, the bubble detection sensor 11 is “off”, and then the control unit 10 sends a stop signal to the driving variable motor 13 and the motor 16. It is configured to.

Referring to the operation of the present invention configured as described in detail as follows.

Bubbles 5 generated in the solution reservoir 1 during the coating operation on the related electrical steel strip 4 are collected toward the rubber belt 14 due to the generation of a shovel caused by the rotation of the precipitation roll 2.

When the bubbles 5 are generated and collected in this manner, the bubble detection sensor 11 is activated to generate an electric signal. The control unit 10 causes the variable motor 13 to be rotated counterclockwise, and the motor 16 is operated. Transmits a signal to drive in a clockwise direction, and the variable motor 13 and the motor 16 which are stopped by the signal from the control unit 10 are driven.

Accordingly, the rubber belt 14 proceeds in the direction shown in the drawing, and during operation of the rubber belt 14, bubbles are accumulated in the buckets 15 on the belt and move along the buckets 15. The bubbles in the bucket 15 moved together are poured down between the driving wave roll roll 17 and the driven wave roll roll 18 when the rubber belt 14 is turned at the position of the driven roll 19. In this way, the bucket 15 having moved the foam is reversed at the moment passing through the driven papo roll 18, and after passing through the driven papo roll 18 is restored to its original state by the rubber elasticity to move the bubble of the solution again.

On the other hand, the bubbles poured down between the driving papo rolls 17 and the driven papo rolls 18 by the operation of the rubber belt 14 are bubbled while passing between the rolls of the helical gear form interlocked with each other to become a liquid state after receiving the solution It becomes lump in (21).

The solution collected in the solution receiver 21 overflows through the solution discharge line 9 and is collected in the solution supply tank 22. The solution thus collected is pumped by the pump 23 to supply the solution supply line 8. It is used to feed back into the solution reservoir (1).

If the bubble level is reduced and the bubble level is reduced as described above, the bubble detection sensor 11 is “off,” and thus the control unit 10 stops the variable motor 13 and the motor 16 to remove the bubble. Will end.

As described above, the present invention is generated in the coating solution during the coating operation by the action of the driving Paporoll 17 and the driven Paporoll 18, which interlock with each other, and the rubber belt 14 for transferring the bubbles generated between the rolls. By effectively separating and breaking the foam and recovering the reused solution, cost reduction and coating surface quality can be greatly improved, and safe operation is possible by protecting the worker from coating solution containing toxic substances such as hexavalent chromium. There is an effect that makes it.

Claims (2)

Rubber which is formed integrally by advancing in one direction by driving roll 12 and driven roll 19 on one side of solution reservoir 1 and arranging a plurality of buckets 15 at regular intervals on the outer surface thereof A belt 14 is provided, and a drive wavepoll roll 17 and a driven wavepoll 18 having a helical gear shape which are engaged with each other and rotated are installed at a position adjacent to the traveling end of the driven roll 19 side of the rubber belt 14. And, in place in the solution reservoir (1) in which the rubber belt 14 is installed, the foam sensor 11 is installed, but the variable motor 13 for driving the foam sensor 11 and the driving roll 12 to rotate And Bubble removing apparatus of the non-oriented electrical steel coating solution, characterized in that the configuration by electrically connecting the motor 16 for driving the drive parpo roll 17 to the control unit 10. The solution receiver (21) according to claim 1, further comprising a solution receiver (21) having a solution discharge line (9) disposed at a lower portion of the drive paporoll (17) and a driven target battery (18). After removing the solution to the solution supply tank (22), the defoamer of the non-oriented electrical steel coating solution, characterized in that configured to be used for re-supply to the solution reservoir (1) through the pump 23 and the solution supply line (8) .