KR101281222B1 - Polymer coating apparatus for casting roll - Google Patents

Abstract

PURPOSE: A polymer coating apparatus for a casting roll is provided to automatically coat the surface of the casting roll with polymer. CONSTITUTION: A polymer coating apparatus (100) for a casting roll (20) comprises a spray unit (200) for spraying polymer to the surface of the casting roll; a polymer supply unit (300) for supplying the liquid polymer to the spray unit; and a movement control unit (400) for controlling the movement of the spray unit by interlocking with the rotation of the casting roll so that the polymer sprayed by the spray unit can be sprayed to the surface of the casting roll. The polymer supply unit comprises a storage tank (310) for storing the liquid polymer; an air supply part for supplying air to the spray unit; an air control valve for controlling air volume supplied from the air supply part; and a polymer supply pipe (320) interlocked with the storage tank and positioned on an air supply line of the air supply part to supply the polymer with the air.

Description

Casting Roll Polymer Coating Machine {POLYMER COATING APPARATUS FOR CASTING ROLL}

The present invention relates to a casting roll polymer coating apparatus for automatically coating the polymer on the surface of the casting roll during the surface treatment process of the casting roll used in the production of cast steel.

In general, the cast steel is passed through a plurality of casting rolls through the molten steel supplied in the steelmaking process, it is made of a cast steel of the desired thickness.

The cast steel has a cooling rate between the surface and the center portion in the course of the molten steel passes through the casting roll, thereby forming a solidified shell from the surface and solidification proceeds.

On the other hand, as the cast steel is in contact with the casting roll in the process of forming the solidification shell, defects such as cracks may occur on the surface of the cast steel due to the surface state of the casting roll and the resulting thermal stress, and variations in the quality of the overall product may occur. do.

Therefore, in the conventional casting roll, various surface treatments are made to effectively disperse the thermal stress of the cast steel in order to prevent defects of the cast steel, and a dimple is formed as an example of such surface treatment.

To this end, in the related art, a main dimple is first formed by blasting a shot ball into a shot ball, and second fine dimples are formed through laser patterning and etching processes. When the dimple is formed using a double laser, burrs are inevitably generated at the periphery of the dimple, which causes fine cracks on the surface of the casting roll, which adversely affects the life of the casting roll. Therefore, in order to prevent such burr generation, a desired fine dimple is formed by applying a polymer, which is a polymer organic compound, on the surface of the casting roll, and a laser is removed. At that time, the part is etched and formed into fine dimples with a constant depth.

Conventionally, as shown in FIG. 1, the operation of coating the polymer on the surface of the casting roll 20 is manually performed by an operator. That is, in the related art, the operator coats the polymer directly on the surface of the casting roll 20 using the polymer coater 10.

The polymer coated on the casting roll 20 has a thickness of about 30 μm, and work is performed within a precision of ± 5 μm. At this time, if the thickness of the polymer coated on the casting roll is, laser processing is impossible during laser processing, and if the thickness is thin, the polymer film is damaged during etching.

However, in the related art, the application of the polymer is manually performed by the operator, and variations in the application of the polymer occur depending on the skill of the operator or the working condition of the operator, and improvement of this is required.

One embodiment of the present invention is to provide a casting roll polymer coating apparatus for automatically coating a polymer on the surface of the casting roll.

Casting roll polymer coating apparatus according to an embodiment of the present invention comprises a spray unit provided to spray a polymer on the surface of the casting roll; A polymer supply unit supplying a liquid polymer to the injection unit; And controlling the injection unit to move for adjusting the gap between the casting roll in the width direction and the casting roll in conjunction with the rotation of the casting roll so that the polymer injected from the injection unit is sprayed on the surface of the casting roll. The polymer supply unit further includes a storage tank for storing the liquid polymer, an air supply unit for supplying air to the injection unit, and an amount of air supplied to the air supply unit. And a polymer supply pipe which is connected to the storage tank and positioned on an air supply line of the air supply unit to supply a polymer together with air.

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The injection unit may include a frame provided to the movement control unit, a nozzle head for injecting a liquid polymer supplied from the polymer supply unit, a clamping unit provided to the frame to fix the nozzle head, and the frame. It may include a shielding member provided to block the scattering of the injected polymer.

The apparatus may further include an air film generating unit provided above and below the shielding member to form an air film around the periphery so that the polymer is injected into the effective spraying region.

The movement control unit may include a casting roll rotation support part rotatably supporting the casting roll, a first moving part for moving the injection unit in the width direction of the casting roll, and the first moving part provided to the It may include a second moving unit for adjusting the interval between the injection unit and the casting roll.

One embodiment of the present invention can automate the coating operation of the polymer liquid on the surface of the casting roll, it is possible to maintain a constant work quality, it is possible to make the overall coating thickness constant to improve the quality. In addition, the present embodiment can prevent safety accidents caused by workers exposed to harmful working environment. In addition, the present embodiment can improve the work speed can improve the overall productivity.

1 is a view showing a polymer coating process for casting rolls according to the prior art.
Figure 2 is a perspective view showing a casting roll polymer coating apparatus according to an embodiment of the present invention.
Figure 3 is a plan view showing a casting roll polymer coating apparatus according to an embodiment of the present invention.
Figure 4 is a side view of the casting roll polymer coating apparatus according to an embodiment of the present invention.
Figure 5 is a side view showing the injection unit of the cast roll polymer coating apparatus according to an embodiment of the present invention.
Figure 6 is a front view showing the injection unit of the cast roll polymer coating apparatus according to an embodiment of the present invention.
7 is a plan view showing a spray unit of a casting roll polymer coating apparatus according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings.

2 is a perspective view showing a casting roll polymer coating apparatus according to an embodiment of the present invention, Figure 3 is a plan view showing a casting roll polymer coating apparatus according to an embodiment of the present invention. In addition, Figure 4 is a side view of the cast roll polymer coating apparatus according to an embodiment of the present invention.

2 to 4, the cast roll polymer coating apparatus 100 of the present embodiment may include a spray unit 200, a polymer supply unit 300, and a movement control unit 400.

In this embodiment, the casting roll polymer coating apparatus 100 may include an injection unit 200 for injecting the polymer.

Figure 5 is a side view showing the injection unit of the cast roll polymer coating apparatus according to an embodiment of the present invention, Figure 6 is a front view showing the injection unit of the casting roll polymer coating apparatus according to an embodiment of the present invention, 7 is a plan view showing a spray unit of a casting roll polymer coating apparatus according to an embodiment of the present invention.

5 to 7, the spray unit 200 may be provided to spray the polymer on the surface of the casting roll 20.

The injection unit 200 may be controlled by the movement control unit 400.

To this end, the injection unit 200 may include a frame 410 provided to the movement control unit 400.

In addition, the injection unit 200 may include a nozzle head 210 for injecting a liquid polymer supplied from the polymer supply unit 300. Here, the nozzle head 210 may be fixedly held by the clamping unit 420 provided in the frame 410.

The clamping unit 420 is provided with a movable member 422 movable on one side of the frame 410 by rotation or the like, and the nozzle head 210 pressed by the movable member 422 on the opposite side of the movable member 422. A fixing member 424 may be provided.

In addition, seating grooves 423 and 425 in which the nozzle head 210 may be mounted may be provided at ends of the movable member 422 and the fixing member 424.

On the other hand, the clamping unit 420 in this embodiment is not limited and may be modified in various embodiments.

For example, the clamping unit 420 may include an actuator provided on one side of the frame 410. The actuator may be provided to be stretchable by hydraulic or pneumatic, for this purpose may include a cylinder 426 filled with fluid or gas, and an operating rod 427 movably provided to the cylinder 426. .

The clamping unit 420 pushes the injection unit 200 as the operation rod 427 moves by the hydraulic or pneumatic pressure provided to the cylinder 426, and the injection unit 200 moves the operation rod 427. As it is supported by the fixing member 424 disposed opposite the member 422, a bite state can be maintained.

In addition, in the present embodiment, the actuator may be provided to be moved including a motor using electricity or the like.

On the other hand, in the present embodiment, the polymer supply unit 300 may include a storage tank 310 for storing the liquid polymer. In addition, the storage tank 310 may be provided with a polymer supply pipe 320 to be connected to the injection unit 200 to supply the polymer.

In addition, the polymer supply pipe 320 may include pumping means for injecting the polymer at a high pressure. Such pumping means may include a pump 330 provided at one side of the polymer supply pipe 320 to pump the polymer in the liquid phase.

In this embodiment, the pump 330 may be provided as a metering pump. The pump 330 may supply the liquid polymer stored in the storage tank 310 to the injection unit 200 at high pressure, and the injection unit 200 may inject the liquid polymer supplied in the form of a spray.

In addition, the polymer supply pipe 320 may be provided with a polymer supply valve operated by the control unit 500. For example, in the present embodiment, the polymer supply valve 320 may include a solenoid valve, and when the operation signal is input to the control unit 500, the solenoid valve may operate to control the supply of the polymer. In addition, the polymer supply pipe 320 may supply the polymer at a high pressure in connection with the operation of the solenoid valve and the pump 330.

As such, the polymer supplied to the injection unit 200 by the polymer supply unit 300 may be atomized and sprayed in a spray form.

In this embodiment, the storage tank 310 in which the liquid polymer is stored may have a capacity of about 20L, and may be varied in consideration of the size of the casting roll 20 or the continuous coating ability of the casting roll 20. have.

On the other hand, the polymer supply unit 300 in the present embodiment has been described as being supplied at a high pressure and injected by the pump 330, the means for injecting the polymer is not limited to this, it can be variously modified.

For example, in the present embodiment, the polymer supply unit 300 may include a storage tank 310 for storing a liquid polymer.

In addition, the polymer supply unit 300 is connected between the injection unit 200 and the air supply pipe for injecting air, and is connected between the storage tank 310 and the injection unit 200 so that the outlet is injected by the air supply pipe It may include an associated polymer supply pipe 320.

For example, in the present embodiment, the air supply pipe and the polymer supply pipe 320 may be provided as flexible hoses.

In addition, the polymer supply unit 300 may include an air valve that is controlled by the control unit 500 to vary the amount of air injected through the air supply pipe. Then, the air is discharged to the injection unit by the operation of the air valve, whereby the liquid polymer stored in the storage tank 310 is supplied through the polymer supply pipe 320 as the internal air pressure is lowered, the air and It is also possible to be mixed and configured to be injected in the injection unit.

In addition, one side of the frame 410 may be provided with a shielding member 430 for blocking the scattering of the polymer injected from the injection unit 200.

Shielding member 430 may be provided in the form of a plate, one side may be provided with an open portion 432 open to expose a portion of the injection unit 200. For example, in the present embodiment, the opening part 432 may be provided as a slit groove open from the upper side to the lower side.

In addition, an air film generating unit 250 may be provided above and below the shielding member 430 to form an air film around the periphery portion so that the polymer is injected into the effective injection region.

The air film generating unit 250 may include a plurality of air spray nozzles 260 provided on the upper and lower portions of the shielding member 430.

The air injection nozzle 260 may inject air at a high pressure to the outside of the effective injection region of the polymer injected by the injection unit 200, the polymer injection liquid (P) by the air curtain film (A) formed accordingly ) Can be prevented from leaving the effective injection area.

On the other hand, the movement control unit 400 in the present embodiment may include a casting roll rotation support portion 450 for rotatably supporting the casting roll 20.

The casting roll rotation support part 450 may include a bearing 452, and may support both ends of the rotating shaft of the casting roll by using the bearing 452.

In addition, at least one of the rotating shafts 22 of the casting roll 20 may be provided with a first gear 24 for driving.

In addition, the casting roll rotary support 450 is provided with a second gear portion 454 meshed with the first gear 24, and the second gear 454 is provided at one side of the casting roll rotary support 450. The first gear 24 may be rotated in conjunction with the rotation of the motor 456.

Here, the motor 456 may be provided as a step motor, and the rotation speed may be adjusted by the controller 500.

On the other hand, a reducer may be provided between the motor 456 and the second gear portion 454, thereby reducing or accelerating the rotational speed of the motor 456.

In addition, the front portion of the casting roll 20 may be provided with a first moving unit 460 for moving the injection unit 200 in the width direction of the casting roll 20.

The first moving part 460 may include a first moving frame 462 having a length corresponding to the widthwise displacement of the casting roll.

The first moving frame 462 may be provided with a shaft member 464 provided with a ball screw 463 in the width direction. In addition, the first moving frame 462 may be provided with at least one guide member 466 spaced a predetermined distance along the shaft member 464.

In addition, a motor 465 for rotating the shaft member 464 may be provided at one side of the first moving frame 462. In this embodiment, the motor 465 may be provided as a step motor, and the operation may be controlled by the controller 500.

In addition, the first moving frame 462 may include a second moving part provided to be movable along the shaft member 464 and the guide member 466.

Here, the second moving part may include a second moving frame 470, and the second moving frame 470 is coupled to the ball screw shaft member 472 to be connected to the rotation of the ball screw shaft member 472. A coupling block 474 for moving the two-moving frame 470 may be provided.

In addition, the second moving frame 470 may be provided with a guide block 478 coupled to the guide member 476 to guide the movement. For example, in the present embodiment, the guide block may be provided as an LM guide.

In the present embodiment, the second moving frame 470 is the casting roll 20 of the second moving frame 470 as the ball screw shaft member 472 is rotated by the motor 478 operated by the control unit 500. You can move in a direction that is closer or farther away.

In addition, both ends of the first moving frame 460 may be provided with a limit sensor 480 for limiting the movement of the second moving frame 470.

The limit sensor 480 may be provided with an optical type using a porter sensor, a proximity type using a magnetic force, or a touch type using a contact.

For example, when the touch type limit sensor is applied as the limit sensor 480, touch sensing parts for detecting a contact may be provided at both ends of the first moving frame 460, and the touch type is provided on the second moving frame 470. A touch member provided to contact the sensing unit may be provided.

As described above, in the casting roll polymer coating apparatus 100 of the present embodiment, the first moving frame 460 moves in the width direction of the casting roll 20 in association with the rotational speed of the casting roll 20, and the second moving portion The frame 470 may be provided to move toward or away from the casting roll 20 along the first moving frame 460 to coat the polymer on the entire area corresponding to the width and diameter of the casting roll 20.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. It will be clear to those who have knowledge.

20: casting roll 22: rotating shaft
24: first gear 100: casting roll polymer coating device
200: injection unit 210: nozzle head
250: air film generating unit 250: air spray nozzle
300: polymer supply unit 310: storage tank
320: polymer supply piping 330: pump
400: movement control unit 410: frame
420: clamping unit 422: movable member
424: fixing member 426: cylinder
427: operating rod 430: shield member
432: opening 450: casting roll rotation support
452: bearing 454: second gear part
456: motor 460: first moving part
462: first moving frame 463: ball screw
464: shaft member 465: motor
466: guide member 470: second moving frame
472: shaft member 474: coupling block
476: guide member 478: motor
480: limit sensor 500: control unit

Claims (6)

An injection unit provided to inject a polymer onto a surface of the casting roll;
A polymer supply unit supplying a liquid polymer to the injection unit; And
Movement control for controlling the injection unit to move for adjusting the width direction of the casting roll and the distance between the casting roll in conjunction with the rotation of the casting roll so that the polymer injected from the injection unit is sprayed on the surface of the casting roll A unit;
The polymer supply unit includes a storage tank for storing the liquid polymer, an air supply unit for supplying air to the injection unit, an air control valve for adjusting the amount of air supplied to the air supply unit, and the storage tank; And a polymer supply pipe connected to the air supply line and supplying the polymer together with the air.
delete delete The method of claim 1, wherein the injection unit
A frame provided to the movement control unit;
A nozzle head for injecting a liquid polymer supplied from the polymer supply unit;
A clamping unit provided on the frame and fixing the nozzle head;
Casting roll polymer coating apparatus comprising a shielding member provided to the frame to block the scattering of the injected polymer.
The method of claim 4,
And an air film generating unit provided on upper and lower portions of the shielding member to form an air film to a peripheral portion such that the polymer is sprayed into the effective spraying area.
The method according to any one of claims 1, 4 and 5, wherein the movement control unit
Casting roll rotation support for rotatably supporting the casting roll,
A first moving part which moves the injection unit in the width direction of the casting roll;
Casting roll polymer coating apparatus provided on the first moving portion comprises a second moving portion for adjusting the distance between the injection unit and the casting roll.

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