KR102675579B1 - Device for painting metal material surface - Google Patents

Abstract

The present invention relates to a metal surface coating device. The metal surface painting device applies a surface treatment chemical that removes oil films and foreign substances to the surface of the metal material and a transfer unit that transports the metal material, and the surface treatment chemical is applied to the surface of the metal material. A surface treatment section for cleaning the surface of a metal material, a painting section for painting the cleaned metal material by spraying painting chemicals on the surface of the cleaned metal material twice, drying the cleaned metal material and the painted metal material with hot air, It includes a drying unit, and a control unit that controls the transfer unit, surface treatment unit, painting unit, and drying unit, respectively.

Description

Metal surface painting device {DEVICE FOR PAINTING METAL MATERIAL SURFACE}

The present invention relates to a device for painting the surface of a metal material, and more specifically, in painting the surface of a metal material, a method of removing oil film and foreign substances from the surface of the metal material, drying, first painting, second painting, and drying is used. At this time, it is a technology that purifies surface treatment chemicals (ex. oil film remover, etc.) used to remove oil films and foreign substances for reuse.

Metal painting is the process of forming a coating film by spraying or using a roller a chemical to be coated on the surface of a metal material, and is done for the purpose of protecting or beautifying the surface of the metal material.

Meanwhile, in painting work, in order to prevent bubbles from forming in the paint film or the paint film peeling off due to separation of foreign substances, it is essential to treat the surface of the metal material before painting. In the case of the surface treatment chemicals used at this time, Due to its harmfulness, there has been a problem of causing environmental pollution.

Meanwhile, the matters described as background technology above are only for the purpose of improving understanding of the background of the present invention, and should not be taken as recognition that they correspond to prior art already known to those skilled in the art. will be.

Registered Patent Publication No. 10-2264835, 2021.06.08.

The problem to be solved by the present invention is to provide a metal surface painting device that proposes a method for automating painting operations and reusing surface treatment chemicals.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

In the metal surface coating device according to one aspect of the present invention to solve the above-described problem, a surface treatment chemical for removing oil films and foreign substances is applied to the surface of the metal material and the conveying unit for transporting the metal material, and surface treatment is performed. A surface treatment section for cleaning the surface of a metal material to which chemicals have been applied; a painting section for painting the cleaned metal material by spraying the painting chemical twice on the surface of the cleaned metal material; the cleaned metal material and the painted metal material. A drying unit for hot air drying, and a control unit for controlling the transfer unit, surface treatment unit, painting unit, and drying unit, respectively, wherein the surface treatment unit targets the surface of the transferred metal material, a first tank storing a surface treatment chemical, and A first chamber for applying the surface treatment chemical supplied from the first tank and washing the surface of the metal material to which the surface treatment chemical is applied with water supplied from the water supply pipe, and the liquid used from the first chamber, A supply pipe comprising a purification member for obtaining a used liquid and obtaining a surface treatment chemical purified from the used liquid, wherein the first chamber obtains a surface treatment chemical from a tank and obtains a surface treatment chemical purified from the purifying member; A plurality of spray nozzles are installed in the supply pipe to spray surface treatment chemicals passing through the supply pipe, and a recovery pipe to collect the used liquid sprayed from the spray nozzle through a drain and provide the used liquid to the purification member, and a control unit. is characterized by controlling the transfer unit to transfer the metal material to the surface treatment unit, drying unit, painting unit, and drying unit, respectively.

Additionally, the purification member is a first sedimentation tank that precipitates foreign substances contained in the used liquid and performs primary purification of the used liquid, obtains the primarily purified used liquid, and precipitates the remaining substances contained in the primarily purified used liquid. A second precipitation tank for obtaining a purified surface treatment chemical by performing secondary purification, a second tank for obtaining the purified surface treatment chemical from the second precipitation tank and storing the purified surface treatment chemical, and a first sedimentation tank. The tank and the second sedimentation tank, and the second sedimentation tank and the second tank are connected respectively, and include a connection pipe that includes a filter and restricts the movement of sediment, and the supply pipe supplies the surface treatment chemical purified from the second tank. It can be characterized as being acquired.

Additionally, the drying unit may be characterized in that the cleaned metal material is dried within a first temperature range and the painted metal material is dried within a second temperature range.

Additionally, the painting unit sprays the painting chemical on the surface of the metal material dried within the first temperature range to perform primary painting, and the second chamber sprays the painting chemical on the surface of the primary painted metal material to perform secondary painting. It includes a third chamber for painting, wherein the second chamber includes a first storage container for storing a painting chemical, a first painting member for spraying the painting chemical stored in the first storage container, and a painting sprayed from the first painting member. It includes a first dust collection member that electrically collects chemicals, and the third chamber includes a second storage container that stores painting chemicals, a second painting member that sprays the painting chemicals stored in the second storage container, and a second paint. It may include a second dust collection member that electrically collects the painting chemicals sprayed from the member.

Additionally, the metal surface coating device further includes a first sensor unit that senses color on the surface of the metal material, and the control unit receives data from the first sensor unit by sensing the surface of the first painted metal material, Obtain first data, and based on the first data, calculate the average RGB (Red, Green, Blue) value for each area of a certain size among the surface areas of the metal material, and identify additional painted areas where the average RGB value is less than the threshold. And, based on the additional painting area, the spraying area of the second painting member may be controlled.

Additionally, the transfer unit includes a mounting member on which at least one metal material is mounted, and

At least one mounting member is coupled to the guide rail to guide the movement of the mounting member, and the metal surface coating device further includes a second sensor unit that senses the weight and shape of the metal material mounted on the mounting member. And the control unit acquires second data from the second sensor unit, identifies the weight of the metal material based on the second data, and generates a map of the surface area of the metal material based on the second data. Calculate a weight proportional to the weight, calculate the individual moving speed by applying the weight to the preset reference speed of the mounting member, control the guide rail based on the individual moving speed, and determine the spray area based on the map. It may be characterized by identifying and controlling the spray nozzle and the painting unit respectively based on the spray area.

Other specific details of the invention are included in the detailed description and drawings.

According to the metal surface painting device of the present invention, during painting work, metal materials are automatically transferred to locations according to each process, thereby saving working time and labor costs, and preventing environmental pollution by reusing surface treatment chemicals.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a schematic diagram of a metal surface coating device according to an embodiment of the present disclosure.
Figure 2 is a diagram illustrating a surface treatment unit according to an embodiment of the present disclosure.
Figure 3 is a diagram showing a first painting member according to an embodiment of the present disclosure.
Figure 4 is a diagram showing a purification member according to an embodiment of the present disclosure.
Figure 5 is a photograph of a surface treatment unit according to an embodiment of the present disclosure.
Figure 6 is a photograph of an operation of a surface treatment unit according to an embodiment of the present disclosure.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to provide a general understanding of the technical field to which the present invention pertains. It is provided to fully inform the skilled person of the scope of the present invention, and the present invention is only defined by the scope of the claims.

The terminology used herein is for describing embodiments and is not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other elements in addition to the mentioned elements. Like reference numerals refer to like elements throughout the specification, and “and/or” includes each and every combination of one or more of the referenced elements. Although “first”, “second”, etc. are used to describe various components, these components are of course not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be a second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless clearly specifically defined.

Spatially relative terms such as “below”, “beneath”, “lower”, “above”, “upper”, etc. are used as a single term as shown in the drawing. It can be used to easily describe the correlation between a component and other components. Spatially relative terms should be understood as terms that include different directions of components during use or operation in addition to the directions shown in the drawings. For example, if you flip a component shown in a drawing, a component described as "below" or "beneath" another component will be placed "above" the other component. You can. Accordingly, the illustrative term “down” may include both downward and upward directions. Components can also be oriented in other directions, so spatially relative terms can be interpreted according to orientation.

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

FIG. 1 is a schematic diagram of a metal surface coating device according to an embodiment of the present disclosure, FIG. 2 is a diagram of a surface treatment unit 120 according to an embodiment of the present disclosure, and FIG. 3 is a schematic diagram of a surface treatment unit 120 according to an embodiment of the present disclosure. 1 is a diagram of the painting member 131, Figure 4 is a diagram of a purification member according to an embodiment of the present disclosure, Figure 5 is a photograph of the surface treatment unit 120 according to an embodiment of the present disclosure, and Figure 6 is a diagram of the surface treatment unit 120 according to an embodiment of the present disclosure. This is a photo of the surface treatment unit 120 in operation according to an embodiment of the present disclosure.

As shown in FIG. 1, the metal surface coating device includes a transfer unit 110, a surface treatment unit 120, a painting unit 130, a drying unit 140, and a control unit 150.

Specifically, the transfer unit 110 transfers the metal material 10 to the surface treatment unit 120, the drying unit 140, the painting unit 130, and the drying unit 140, respectively, under the control of the control unit 150. .

The surface treatment unit 120 applies a surface treatment chemical that removes oil films and foreign substances to the surface of the metal material 10, and cleans the surface of the metal material 10 to which the surface treatment chemical has been applied.

The painting unit 130 sprays the coating chemical on the surface of the cleaned metal material 10 twice to paint the cleaned metal material 10.

The drying unit 140 dries the cleaned metal material 10 and the painted metal material 10 with hot air.

The control unit 150 controls the transfer unit 110, the surface treatment unit 120, the painting unit 130, and the drying unit 140, respectively.

To this end, the control unit 150 may include a memory, a communication unit, and a processor.

In one embodiment, the control unit 150 may be used in a server, a smartphone, a tablet personal computer, a mobile phone, a video phone, a laptop PC, or a netbook computer. , it may operate in connection with at least one electronic device selected from the group consisting of a laptop computer, a personal digital assistant (PDA), a portable multimedia player (PMP), and a wearable device, or may be an electronic device.

In this specification, a computer refers to all types of hardware devices including at least one processor, and depending on the embodiment, it may be understood as encompassing software configurations that operate on the hardware device. For example, a computer can be understood to include, but is not limited to, a smartphone, tablet PC, desktop, laptop, and user clients and applications running on each device.

Meanwhile, the memory can store various programs and data necessary for the operation of the control unit 150. Memory can be implemented as non-volatile memory, volatile memory, flash-memory, hard disk drive (HDD), or solid state drive (SSD).

The communication unit can perform communication with external devices. In particular, the communication unit may include various communication chips such as a Wi-Fi chip, a Bluetooth chip, a wireless communication chip, an NFC chip, and a low-energy Bluetooth chip (BLE chip). At this time, the Wi-Fi chip, Bluetooth chip, and NFC chip communicate in the LAN method, WiFi method, Bluetooth method, and NFC method, respectively. When using a Wi-Fi chip or Bluetooth chip, various connection information such as SSID and session key are first transmitted and received, and various information can be transmitted and received after establishing a communication connection using this. A wireless communication chip refers to a chip that performs communication according to various communication standards such as IEEE, ZigBee, 3G (3rd Generation), 3GPP (3rd Generation Partnership Project), LTE (Long Term Evolution), and 5G (5th Generation).

The processor can control the overall operation of the control unit 150 using various programs stored in memory. The processor may be composed of RAM, ROM, graphics processing unit, main CPU, first to n interfaces, and bus. At this time, RAM, ROM, graphics processing unit, main CPU, first to n interfaces, etc. may be connected to each other through a bus.

RAM stores O/S and application programs. Specifically, when the control unit 150 is booted, the O/S is stored in RAM, and various application data selected by the user can be stored in RAM.

ROM stores a set of instructions for booting the system. When the turn-on command is input and power is supplied, the main CPU copies the O/S stored in memory to RAM according to the command stored in ROM, executes the O/S, and boots the system. When booting is complete, the main CPU copies various application programs stored in memory to RAM and executes the application programs copied to RAM to perform various operations.

The graphics processing unit uses a calculation unit (not shown) and a rendering unit (not shown) to create a screen containing various objects such as items, images, and text. Here, the calculation unit may be configured to calculate attribute values such as coordinate values, shape, size, color, etc. for each object to be displayed according to the layout of the screen using a control command received from the input unit. Additionally, the rendering unit may be configured to generate screens of various layouts including objects based on attribute values calculated by the calculation unit. The screen generated by this rendering unit may be displayed within the display area of the display.

The main CPU accesses memory and performs booting using the OS stored in the memory. And, the main CPU performs various operations using various programs, content, data, etc. stored in memory.

The first to n interfaces are connected to the various components described above. One of the first to n interfaces may be a network interface connected to an external device through a network.

Meanwhile, the processor may include one or more cores (not shown), a graphics processing unit (not shown), and/or a connection passage (for example, a bus, etc.) for transmitting and receiving signals to and from other components.

A processor according to one embodiment performs the method described in connection with the present invention by executing one or more instructions stored in memory.

For example, the processor acquires new training data by executing one or more instructions stored in memory, performs a test on the acquired new training data using a learned model, and the test result, labeled information Extract first learning data obtained with an accuracy greater than a predetermined first reference value, delete the extracted first learning data from the new learning data, and use the new learning data from which the extracted learning data has been deleted. The learned model can be retrained.

Meanwhile, the processor further includes RAM (Random Access Memory, not shown) and ROM (Read-Only Memory, not shown) that temporarily and/or permanently store signals (or data) processed inside the processor. It can be included. Additionally, the processor may be implemented in the form of a system on chip (SoC) that includes at least one of a graphics processing unit, RAM, and ROM.

Programs (one or more instructions) for processing and controlling the processor can be stored in the memory. Programs stored in memory may be divided into a plurality of modules according to their functions.

Meanwhile, the surface treatment unit 120 includes a first tank, a first chamber, and a purification member.

Specifically, the first tank stores the surface treatment chemical, and the first chamber applies the surface treatment chemical supplied from the first tank to the surface of the transferred metal material 10, and the surface treatment chemical is applied to the surface of the metal material 10. The surface of the metal material 10 is washed with water supplied from the water supply pipe 121.

The purification member obtains a used liquid, which is a used liquid, from the first chamber, and obtains a surface treatment chemical purified from the used liquid.

The first chamber includes a supply pipe 121, a spray nozzle 122, and a return pipe 123, as shown in FIGS. 2, 4, and 5.

Specifically, the supply pipe 121 obtains the surface treatment chemical from the tank and the purified surface treatment chemical from the purification member, and the spray nozzle 122 has a plurality of spray nozzles in the supply pipe 121, as shown in FIG. 6. It is installed and sprays the surface treatment chemical passing through the supply pipe 121.

At this time, the recovery pipe obtains the used liquid sprayed from the spray nozzle 122 through the drain and provides the used liquid to the purification member.

Meanwhile, as shown in FIG. 4, the purification member may include a first sedimentation tank 124, a second sedimentation tank 125, a second tank 126, and a connection pipe.

Specifically, the first settling tank 124 can obtain the used liquid through the recovery pipe 123, precipitate foreign substances contained in the used liquid, and perform primary purification of the used liquid.

The second sedimentation tank 125 obtains the primarily purified used solution, precipitates the remaining substances contained in the primarily purified used solution, and performs secondary purification, thereby obtaining a purified surface treatment chemical.

The second tank 126 obtains the purified surface treatment chemical from the second sedimentation tank 125 and stores the purified surface treatment chemical. In this configuration, the connection pipe is connected to the first sedimentation tank 124. and the second sedimentation tank 125, and the second sedimentation tank 125 and the second tank 126 are respectively connected, and a filter may be included to limit the movement of sediment.

Accordingly, the supply pipe 121 can obtain the purified surface treatment chemical from the second tank 126 and provide the purified surface treatment chemical to the first chamber.

Meanwhile, the drying unit 140 can dry the washed metal material 10 within a first temperature range and the painted metal material 10 within a second temperature range.

At this time, the first temperature range may include 140 degrees, and the second temperature range may be a certain temperature range including 220 degrees, and the first temperature range may be a lower temperature range than the second temperature range. , but is not limited to this.

Meanwhile, the painting unit 130 may include a second chamber and a third chamber.

Specifically, the second chamber is a space for primary painting by spraying a coating chemical on the surface of the metal material 10 dried within the first temperature range, and the third chamber is a space for primary painting of the metal material 10 that has been first painted. It may be a space for secondary painting by spraying painting chemicals on the surface.

At this time, the second chamber includes a first reservoir for storing painting chemicals, a first painting member 131 for spraying the painting chemicals stored in the first reservoir as shown in FIG. 3, and a first painting member ( It may include a first dust collection member that electrically collects the painting chemicals sprayed from 131).

The third chamber also includes a second reservoir for storing painting chemicals, a second painting member for spraying the painting chemicals stored in the second storage container, and a second dust collector for electrically collecting the painting chemicals sprayed from the second painting member. May include absences.

In each of the first dust collecting member and the second dust collecting member, the coating chemical sprayed and spread in the air can be dusted in the dust collecting member due to the magnetism of the dust collecting member.

Meanwhile, the metal surface coating device may include a first sensor unit including at least one sensor (ex. color sensor, camera, etc.) to sense color on the surface of the metal material 10.

Accordingly, the control unit 150 acquires first data, which is data for sensing the surface of the first painted metal material 10, from the first sensor unit, and based on the first data, the surface of the metal material 10 Among the areas, the average RGB (Red, Green, Blue) value for each area of a certain size can be calculated, and additional painted areas where the average RGB value is less than the threshold can be identified among the areas of a certain size.

At this time, when an additional painting area is identified, the control unit 150 controls the spraying area of the second painting member based on the additional painting area to cover the entire surface of the metal material 10 while performing secondary painting. Spray the painting chemical to the target, but increase the spraying time for a certain amount of time for additional painting areas that require additional painting, thereby preventing the occurrence of unpainted areas and improving the completeness of the metal surface painting work. It can be raised.

In an embodiment, the control unit 150 receives third data, which is data from sensing the surface of the second coated metal material 10, from the first sensor unit, and data of the metal material 10 dried within the second temperature range. Fourth data, which is data from sensing the surface, can be obtained.

Accordingly, the control unit calculates the expected dryness, which is the expected RGB value in the dry state of the secondary painted metal material 10, based on the drying weight, which is a weight proportional to the preset drying temperature, and the third data. You can.

Based on the fourth data, the control unit 150 calculates a dryness level, which is the average RGB value of the entire surface area of the metal material 10 dried within the second temperature range, and determines the dryness level and the expected dryness level. The car price can be calculated.

When the calculated difference value exceeds the critical difference value, the control unit 150 calculates an additional drying time proportional to the calculated difference value, and during the additional drying time, the secondary painted metal material 10 is dried within the second temperature range. By re-drying, the paint film formed on the surface of the metal material 10 can be completely dried.

Meanwhile, the transfer unit 110 includes a mounting member 111 on which at least one metal material 10 is mounted, as shown in FIGS. 2, 3, 5, and 6. It may include at least one guide rail 112 that is coupled to guide the movement of the mounting member 111.

In addition, the metal surface coating device includes at least one sensor (ex. weight sensor, etc.) for sensing the weight of the metal material 10 mounted on the mounting member 111, and the metal material 10 mounted on the mounting member 111. ) may include a second sensor unit including at least one sensor (ex. vision sensor, laser sensor, camera, etc.) for sensing the shape of the shape.

Accordingly, the control unit 150 acquires second data from the second sensor unit, identifies the weight of the metal material 10 based on the second data, and determines the weight of the metal material 10 based on the second data. You can create a map of the surface area.

The control unit calculates a weight proportional to the weight, applies the weight to the preset reference speed of the mounting member 111, calculates the individual movement speed, and controls the guide rail 112 based on the individual movement speed, In order to minimize the degree of shaking when transporting the metal material 10, the moving speed is applied differently based on the weight to prevent surface damage to the metal material 10 due to hitting other neighboring metal materials, walls, guide rails 112, etc. It can be prevented.

In addition, the control unit identifies the spraying area based on the map and controls the spraying nozzle 122 and the painting unit 130 based on the spraying area, thereby preventing spraying of an unnecessary amount of chemical, thereby reducing the waste of chemical. This can prevent waste of money and environmental pollution.

Meanwhile, in an embodiment, the control unit 150 may calculate the expected weight of the metal material 10 dried within the second temperature range based on the weight and the map.

Accordingly, the control unit 150 acquires the fifth data, which is data sensing the final weight of the metal material 10 dried within the second temperature range, from the second sensor unit, and identifies it based on the fifth data. You can compare the final weight and the expected weight.

Specifically, the control unit 150 calculates the weight difference between the final weight and the expected weight, and when it is determined that the calculated weight difference exceeds a certain value, the concentration of fine precipitates contained in the purified surface treatment chemical is the critical concentration. is judged to have exceeded, and accordingly, in order to limit the use of the purified surface treatment chemical stored in the second tank 126, the connection between the supply pipe and the second tank 126 is blocked and, through the communication unit, the user You can request disposal of the purified surface treatment chemical stored in the second tank 126 using a terminal (e.g. smartphone, PC, etc.).

Meanwhile, the gold material surface coating device of the present invention can be applied to painting various metal surfaces, but can specifically be used for powder coating.

Powder coating is a method of making synthetic resin into powder, painting it on a metal surface, and finishing it by melting it at a high temperature. As in the present invention, drying is included as an essential process after painting the metal material 10.

Therefore, the metal surface coating device of the present invention can be used for powder coating, but is not limited thereto.

As used in the specification, the term “unit” or “module” refers to a hardware component such as software, FPGA, or ASIC, and the “unit” or “module” performs certain roles. However, “part” or “module” is not limited to software or hardware. A “unit” or “module” may be configured to reside on an addressable storage medium and may be configured to run on one or more processors. Thus, as an example, a “part” or “module” refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, Includes procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within components and “parts” or “modules” can be combined into smaller components and “parts” or “modules” or into additional components and “parts” or “modules”. Could be further separated.

The steps of the method or algorithm described in connection with embodiments of the present invention may be implemented directly in hardware, implemented as a software module executed by hardware, or a combination thereof. The software module may be RAM (Random Access Memory), ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), Flash Memory, hard disk, removable disk, CD-ROM, or It may reside on any type of computer-readable recording medium well known in the art to which the present invention pertains.

Additionally, different embodiments of the present invention may complement or be combined with each other.

The components of the present invention may be implemented as a program (or application) and stored in a medium in order to be executed in conjunction with a hardware computer. Components of the invention may be implemented as software programming or software elements, and similarly, embodiments may include various algorithms implemented as combinations of data structures, processes, routines or other programming constructs, such as C, C++, , it can be implemented in a programming or scripting language such as Java, assembler, Python, etc. Functional aspects may be implemented as algorithms running on one or more processors.

Above, embodiments of the present invention have been described with reference to the attached drawings, but those skilled in the art will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. You will be able to understand it. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive.

10: metal material
110: transfer unit
111: Holding member
112: Guide rail
120: Surface treatment unit
121: supply pipe
122: spray nozzle
123: recovery pipe
124: 1st sedimentation tank
125: Second sedimentation tank
126: 2nd tank
130: painting department
131: first painting member
140: drying section
150: control unit

Claims (6)

In a metal surface coating device,
A transfer unit that transfers the metal material;
A surface treatment unit that applies a surface treatment chemical that removes oil films and foreign substances to the surface of the metal material and cleans the surface of the metal material to which the surface treatment chemical has been applied;
A painting unit that sprays a painting chemical on the surface of the cleaned metal material twice to paint the cleaned metal material;
a drying unit that dries the cleaned metal material and the painted metal material with hot air; and
A control unit that controls the transfer unit, the surface treatment unit, the painting unit, and the drying unit, respectively,
The surface treatment unit,
a first tank storing the surface treatment chemical;
A first chamber in which the surface treatment chemical supplied from the first tank is applied to the surface of the transferred metal material, and the surface of the metal material to which the surface treatment chemical is applied is washed with water supplied from a water supply pipe. ; and
It includes a purification member, which obtains a used liquid, which is a used liquid, from the first chamber, and obtains a surface treatment chemical purified from the used liquid,
The first chamber is,
a supply pipe for obtaining the surface treatment chemical from the tank and obtaining the purified surface treatment chemical from the purification member;
A plurality of spray nozzles are installed in the supply pipe to spray surface treatment chemicals passing through the supply pipe; and
It includes a recovery pipe, which obtains the used liquid sprayed from the spray nozzle through a drain and provides the used liquid to the purification member,
The control unit,
Controlling the transfer unit to transfer the metal material to the surface treatment unit, the drying unit, the painting unit, and the drying unit, respectively,
The drying part,
Drying the cleaned metal material within a first temperature range,
Drying the painted metal material within a second temperature range,
The painting department,
a second chamber for performing primary coating by spraying the coating chemical on the surface of the metal material dried within the first temperature range; and
A third chamber configured to spray the coating chemical on the surface of the first coated metal material and perform the second coat of paint,
The second chamber is,
a first storage container storing the painting chemicals;
a first painting member that sprays the painting chemical stored in the first storage container; and
It includes a first dust collection member that electrically collects the painting chemicals sprayed from the first painting member,
The third chamber is,
a second storage bin for storing the painting chemicals;
a second painting member that sprays the painting chemical stored in the second storage container; and
It includes a second dust collection member that electrically collects the painting chemicals sprayed from the second painting member,
The metal surface coating device,
It further includes a first sensor unit that senses color on the surface of the metal material,
The control unit,
Obtaining first data, which is data for sensing the surface of the first painted metal material, from the first sensor unit,
Based on the first data, the average RGB (Red, Green, Blue) value is calculated for each area of a certain size among the surface areas of the metal material,
Identify additional painted areas where the average RGB value is below a threshold,
A metal surface painting device, characterized in that the spraying area of the second painting member is controlled based on the additional painting area. According to claim 1,
The purification member is,
a first sedimentation tank that precipitates foreign substances contained in the used solution to first purify the used solution;
a second precipitation tank that obtains the primarily purified used liquid, precipitates residual substances contained in the primarily purified used liquid and performs secondary purification, thereby obtaining the purified surface treatment chemical;
a second tank that obtains the purified surface treatment chemical from the second sedimentation tank and stores the purified surface treatment chemical; and
A connection pipe connects the first sedimentation tank and the second sedimentation tank, and the second sedimentation tank and the second tank, respectively, and includes a filter to restrict movement of sediment,
The supply pipe is,
A metal surface coating device, characterized in that obtaining the purified surface treatment chemical from the second tank. delete delete delete According to claim 1,
The transfer unit,
a mounting member on which at least one metal material is mounted; and
It includes a guide rail, which is coupled to at least one mounting member and guides movement of the mounting member,
The metal surface coating device,
It further includes a second sensor unit that senses the weight and shape of the metal material mounted on the mounting member,
The control unit,
Obtaining second data from the second sensor unit,
Based on the second data, the weight of the metal material is identified,
Based on the second data, a map of the surface area of the metal material is generated,
Calculate a weight proportional to the weight,
Applying the weight to the preset reference speed of the holding member to calculate the individual moving speed,
Controlling the guide rail based on the individual movement speed,
Identify the injection area based on the map,
A metal surface coating device, characterized in that the spray nozzle and the painting unit are respectively controlled based on the spray area.

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