KR102546594B1 - The powder coating system - Google Patents

Abstract

The present invention relates to a powder coating system which automatically performs preheating, coating and heating processes excluding the process of mounting an object to be coated and separating the same after coating is completed, while preventing residual coating from leaking to the outside and effectively recycling the same. The powder coating system of the present invention comprises: a coating chamber which sprays and applies powder coating; and a heating chamber which applies high-temperature to an object to be coated which has been powder-coated in the coating chamber, so that the powder coating melts.

Description

The powder coating system}

The present invention relates to a powder coating system, and more specifically, to prevent the leakage of residual paint while allowing preheating, painting, and heating processes to be performed automatically, excluding the process of mounting an object to be painted and separating it after the painting is completed. It relates to a powder coating system developed to enable effective recycling.

In general, painting is done for the purpose of preventing rust by preventing direct contact with the external environment by painting or applying it to the surface of an article, or having an aesthetic element by a unique color. Most commonly used paint is represented by thinner It is known to be painted by mixing organic solvents.

This coating method is called liquid or liquid coating, and these days, when there is a lot of interest in environmental and health problems, various problems due to volatile organic solvents occur, and it is a trend that is gradually avoided, and powder coating, a new coating technique, is gradually increasing. .

Powder coating refers to a method of forming a coating film by directly attaching finely ground and pulverized paint (powder paint) to the object to be painted, melting at a high temperature, drying and hardening, as a painting using a paint in the form of powder, also called powder coating.

For powder coatings, thermosetting resins including epoxy and polyester and thermoplastic resins including polyethylene and nylon are used, and additionally adjustment of fluidity and wettability of pigments and paints and degassing (removing air) of paints, etc. It is common that additives such as hardeners, drying agents, fire extinguishing agents, fillers (fillers) are also added in the form of powder to have the function of.

Powder coating method includes electrostatic powder coating method and flow immersion coating method. Electrostatic powder coating method, which is usually used for metals, sprays negatively charged powder paint from a sprayer on the object to be coated that is positively charged after earth, so that the paint is electrostatically attached to the object As a method of doing so, a chemical reaction called crosslinking is induced by heating to form a hard coating film.

To this end, first remove the contaminants on the surface of the object to be painted. The powder paint is attached to the object to be painted by electrostatic attraction, and the paint attached to the object to be painted is melted by a furnace heated to a high temperature of 180 ~ 200 ℃, dried again, and completed by the process of cooling. Compared to the immersion coating method, there are no restrictions on the shape and size of the object to be coated, a uniform film thickness can be obtained, and the film thickness can be adjusted (30 to 150 μm). There are no downsides.

However, in the process of spraying powder paint, it is often done by manpower, and it is possible to collect and use the sprayed powder paint except for the attached powder paint, but the remaining powder paint cannot be efficiently recovered and spreads widely inside, causing dust and It has the disadvantage that recycling is impossible if it is collected together with the same contaminants.

Therefore, in the case of non-large coating objects, a more improved powder coating system that minimizes the consumption of manpower and uses the used powder coating in an isolated area to minimize leakage to the outside so that the remaining powder coating can be recovered and recycled. development may be required.

Republic of Korea Patent Registration No. 10-1899844-0000 (September 12, 2018) Republic of Korea Patent Registration No. 10-2030094-0000 (October 01, 2019) Korean Patent Registration No. 10-2114589-0000 (May 18, 2020) Republic of Korea Patent Registration No. 10-2264213-0000 (06/07/2021)

The present invention was developed to solve the above-mentioned problems, and its purpose is to maximize the prevention of contamination of the surroundings by the leakage of the powder coating sprayed during powder coating while enabling it to be performed in the maximum automated process of powder coating. It is to develop a powder coating system that can do this.

In addition, it is to develop a powder coating system having a plurality of nozzles that allow the operator to properly control the time and direction of spraying the powder coating rather than directly spraying the paint.

In order to achieve the above object, the present invention provides a painting room for spraying and painting negatively charged powder paint having various colors on the surface of a positively charged object made of metal, and an object coated with powder in the painting room. In the powder coating system comprising a heating chamber for heating the powder coating to melt by applying high-temperature heat to the powder coating system;

It has a path of a single closed curve having a rectangular shape on a plane formed by a plurality of sprockets and chains interlocking with the drive motor, and is mounted on the chain at regular intervals and extends vertically downward, and has a plurality of mounts for mounting the object to be painted. a driving device having a bracket to repeatedly perform a motion of moving as much as the distance of the adjacent mounting bracket and then stopping;

a loading/unloading unit with one side of the front side being opened to separate an object to be painted on the mounting bracket or to mount an object to be painted before painting;

a preheating unit formed on the front side excluding the loading/unloading unit to heat the object to be painted while passing through;

It is formed on one side bent past the loading/unloading part to form a closed space in front, rear, left, right, and top and bottom, and to be opened when one or more objects to be painted enter or leave, and one or more blowers to blow air in an inward and downward direction to the upper part. a painting room having a fan, a hopper formed at a lower part, a suction fan for sucking in air together with the powder paint through the hopper, and one or more spray nozzles for spraying the powder paint on the object to be painted;

A heating chamber formed long along the rear surface to sequentially heat the entering coating object so that the powder coating material can be melted;

It is characterized in that it is configured to include a drying chamber formed on the side surface between the heating chamber and the loading/unloading unit so that the melted powder coating can be hardened.

In addition, the upper end of the mounting bracket is rotatably mounted on the chain and a driven gear is mounted thereon;

The painting room is characterized in that when the object to be painted is in a painting position, a drive gear interlocked with the driven gear and a motor for rotating the drive gear are provided so that the object to be painted rotates while powder coating is applied.

In addition, in the painting room, a pair of entrance doors are installed on both sides where the object to be painted is removed, and a pair of entry doors are installed on both sides of the object to be painted, which are pushed inward while the object to be painted is pushed inward while maintaining the closed state by the spring. with a pair of release doors;

The release door is characterized in that one side is rotatably connected to the rod of the cylinder and the other side is operated by a pair of link members each rotatably connected to the release door.

As described above, the present invention has the process of continuously performing the installation of the object to be painted, preheating, painting, heating, drying, and separation of the object to be painted along the path in which the chain circulates along the path of a single closed curve. In the painting room, before the next painting object moves, the internal system forcibly moves the remaining powder paint to the lower part and allows the painting object to enter or the painted object to leave in the state of removal, reducing contamination by powder paint and recovering powder paint There is an effect that can be easily recycled.

In addition, the movement of the object to be painted is such that the process of stopping after moving a certain distance is repeated, and in the painting room, a nozzle for spraying a plurality of powder paints is provided and a means for rotating the object to be painted is provided so that the operator can By selecting a nozzle and adjusting the spraying time and angle, the painting work is done automatically rather than by manpower, which has the effect of making the work more simple and efficient.

1 is a plan view according to an embodiment of the present invention
2 is a front view according to an embodiment of the present invention
3 is a left side view according to an embodiment of the present invention
4 is a conceptual diagram showing a painting room according to an embodiment of the present invention
5 is a conceptual diagram showing air flow in a painting room according to an embodiment of the present invention.
6 is a conceptual diagram showing an open structure of a painting room according to an embodiment of the present invention

Accordingly, the configuration of the present invention will be described in detail so that those skilled in the art can easily understand and reproduce it with reference to the accompanying drawings.

1 is a plan view according to an embodiment of the present invention, FIG. 2 is a front view according to an embodiment of the present invention, FIG. 3 is a left side view according to an embodiment of the present invention, and FIG. 4 is a view according to an embodiment of the present invention. It is a conceptual diagram showing a painting room according to an embodiment, FIG. 5 is a conceptual diagram showing air flow in a painting room according to an embodiment of the present invention, and FIG. 6 shows an open structure of a painting room according to an embodiment of the present invention. As a conceptual diagram, a painting room 14 in which various colors and negatively charged powder coatings 200 are sprayed and painted on the surface of a positively charged object 100 made of metal, and in the painting room 14 In the powder coating system (1) comprising a heating chamber (15) for heating the powder coating material to be melted by applying high-temperature heat to the powder coated object (100);

It has a path of a single closed curve having a rectangular shape on a plane formed by a plurality of sprockets 112 and chains 113 interlocking with the drive motor 111, and is mounted on the chain 113 at regular intervals to form a vertical lower part. A driving device 11 extending to and having a plurality of mounting brackets 114 to which the object to be painted 100 is mounted so as to move as much as the distance of the adjacent mounting brackets 114 and then stop moving repeatedly;

a loading/unloading unit 12 having one side of the front side opened to separate the painted object 100 from the mounting bracket 114 or to mount the object 100 before painting;

a preheating unit 13 formed on the front surface excluding the loading/unloading unit 12 so that the object to be coated 100 is heated while passing through;

It is formed on one side bent past the loading/unloading part 12 to form a closed space in front and rear, left and right and up and down, and to be opened when one or more coating objects 100 enter or leave, and to inwardly and downwardly One or more blowing fans 141 for blowing air, a hopper 142 formed at the bottom, a suction fan 143 for sucking air together with the powder coating 200 through the hopper 142, and the painting A painting room 14 having one or more spray nozzles 144 for spraying the powder coating material 200 on the object 100;

a heating chamber 15 that is formed long along the rear surface and sequentially heats the entering coating object 100 so that the powder coating material 200 can be melted;

The powder coating system (1) is characterized by comprising a drying chamber (16) formed on the side surface between the heating chamber (15) and the loading/unloading unit (12) to allow the melted powder coating to harden. .

In general, among the powder coating methods, the process in the electrostatic powder coating method of the present application is a process that is known to sequentially pass through the painting room 14 and the heating room 15 like Bonuan, and whether or not preheating is required, that is, the preheating unit 13 is also required. It is possible according to the method, and providing an additional drying chamber 16 when the process section is short can be said to be a known technique.

However, there are only some examples of a circulation structure that evenly distributes these processes in the section of a single closed curve like the present application, separates the painted object 100 after painting, and mounts the painted object 100 before painting by the operator, It was developed to facilitate utilization for the purpose of painting a relatively small coating object 100 while minimizing the installation space of the facility.

In addition, the main feature of the present application is to form the painting room 14 as a closed space and operate the blowing fan 141 and the suction fan 143 when the spraying of the powder coating 200 is completed, so that the inside air and the diffused in the air It has a structure that can be recovered by forcibly moving the powder coating 200 to the bottom, and between the hopper 142 and the suction fan 143 has a trap-like structure so that the powder coating 200 is piled up at the bottom and the remaining It is preferable to configure so that only air is discharged.

With this structure, it is possible to easily recover and recycle the powder coating 200 made of fine powder, and to prevent the powder coating 200 from contaminating the workplace during work.

At this time, the present application is to ensure that the process of spraying the powder coating 200 is performed automatically, so that the plurality of spray nozzles 144 are arranged vertically and horizontally to spray the adjusted angle and the set powder coating. was composed of

For this automation, the top of the mounting bracket 114 is rotatably mounted on the chain 113 and the driven gear 115 is mounted thereon;

The painting room 14 is provided with a driving gear 116 interlocking with the driven gear 115 when the object 100 is in a painting position, and a motor 117 rotating the driving gear 116, An embodiment characterized in that the coating object 100 is configured so that the powder coating 200 is applied while rotating has been additionally presented.

In this configuration, when the mounting bracket 114 reaches the painting position, the driven gear 115 engages with the driving gear 116 so that the object to be painted 100 rotates according to the operation of the motor 117, so that the painting is evenly painted as a whole is to make the work happen.

In addition, in the present application, since the coating object 100 entering the painting room 14 is before painting, there is no fear of contamination, while maintaining a closed state by the spring on both sides of the painting room 14 where the painting object 100 enters. To provide a pair of entry doors 146 to allow the object to be painted 100 to enter while being pushed inwardly;

Since the painted surface is damaged by contact in the state of being painted with the powder coating material 200, a pair of release doors 147 mounted on both sides of the coating object 100 are separated;

The release door 147 presents a configuration operated by a pair of link members 149 having one side rotatably connected to the rod of the cylinder 148 and the other side rotatably connected to the release door 147 respectively. did

At this time, the opening of the entrance door 146 and the exit door 147 is made when the painting is completed and the powder coating 200 in the air is removed by the operation of the blowing fan 141 and the suction fan 143 inside. It consists of

Meanwhile, in a modification of the present invention (not shown), the blowing fan 141 may be disposed above the hopper 142 and the suction fan 143 may be disposed below the hopper 142, and the mounting bracket ( 114 may be disposed between the blowing fan 141 and the suction fan 143 inside the hopper 142 . Accordingly, the suction fan 143 may introduce outside air located on the upper side of the hopper 142 into the hopper 142, and the blowing fan 141 may discharge the air inside the hopper 142 to the outside. there is.

In addition, in the modified example of the present invention, the first sensor (for example, a load cell) for generating a weight value by detecting the weight of the object to be painted 100 on the mounting bracket 114 and the motor 117 are disposed in the motor 117 Operation status and operating time of the blowing fan 141 and the suction fan 143 by receiving the second sensor (for example, an encoder) and the weight value of the first sensor and the number of rotations of the second sensor that generate the number of revolutions of An electronic control unit (not shown) for adjusting the may be added.

In the electronic control unit, when the weight value of the first sensor of the object to be coated 100, which is the first condition, is greater than a specific value and the number of revolutions of the second sensor is greater than a specific value, a large amount of powder coating 200 is discharged, so powder coating is completed. Both the blower fan 141 and the suction fan 143 may be operated for the first time.

In addition, when the weight value of the first sensor of the object to be coated 100, which is the second condition, is greater than a specific value and the number of rotations of the second sensor is less than a specific value, the electronic control unit discharges a large amount of powder coating 200, but the first condition Since it is expected that it will not be more than the first time, after the powder coating is completed, both the blowing fan 141 and the suction fan 143 can be operated for a second time shorter than the first time.

In addition, the electronic control unit discharges a small amount of the powder coating 200 when the weight value of the first sensor of the object to be coated 100 is less than a specific value and the number of rotations of the second sensor exceeds a specific value, which is the third condition. Since it is expected that it will not be more than (since the number of rotations for precision painting and the number of rotations for other cases are not significantly different, the amount of sprayed powder coating is more likely to be affected by the weight of the object to be painted than the number of rotations) ), after the powder coating is completed, only the suction fan 143 may be operated for the first time without operating the blowing fan 141.

Finally, when the weight value of the first sensor of the object to be painted 100, which is the fourth condition, is less than a specific value and the number of rotations of the second sensor is less than a specific value, the powder coating 200 is a small amount less than the third condition. Since it is expected to be discharged as the powder coating, after the powder coating is completed, only the suction fan 143 may be operated without operating the blowing fan 141 for a second time.

According to the foregoing, in the modified example of the present invention, the operation time of the blowing fan 141 and the suction fan 143 is adjusted according to the weight of the object to be coated 100 and the number of revolutions during painting, thereby It has the advantage of reducing the rotation rate by reducing the rotation rate and at the same time reducing unnecessary power consumption.

1: Powder coating system
11: driving device
111: drive motor 112: sprocket
113: chain 114: mounting bracket
115: driven gear 116: old gear
117: motor
12: loading/unloading unit
13: preheating unit
14 : Painting room
141: blowing fan 142: hopper
143: suction fan 144: injection nozzle
146: entry door 147: exit door
148: cylinder 149: link member
15: heating room
16: drying room
100: object to be painted
200: powder coating

Claims (1)

A painting room 14 in which various colors and negatively charged powder coatings 200 are sprayed and coated on the surface of a positively charged object 100 made of metal, and powder coated in the painting room 14 In the powder coating system (1) comprising a heating chamber (15) for heating an object to be coated (100) with high-temperature heat so that the powder coating is melted;
It has a path of a single closed curve having a rectangular shape on a plane formed by a plurality of sprockets 112 and a chain 113 interlocking with the drive motor 111, and is mounted on the chain 113 and extends vertically downward, a driving device 11 having a mounting bracket 114 to which the object to be painted 100 is mounted, and allowing the mounting bracket 114 to move and then stop moving repeatedly;
a loading/unloading unit 12 having one side of the front side opened to separate the painted object 100 from the mounting bracket 114 or to mount the object 100 before painting;
a preheating unit 13 formed on the front surface excluding the loading/unloading unit 12 so that the object to be coated 100 is heated while passing through;
It is formed on one side bent after passing the loading/unloading part 12 to form a closed space in front and rear, left and right and up and down, and to be opened when the object to be painted 100 enters or leaves, and air is blown inward and downward at the top. A blowing fan 141 for blowing air, a hopper 142 formed at the bottom, a suction fan 143 for sucking air together with the powder coating material 200 through the hopper 142, and the object to be coated 100 The painting room 14 having a spray nozzle 144 for spraying powder coating material 200 thereon;
The heating chamber 15, which is formed long along the rear surface and sequentially heats the entering coating object 100 so that the powder coating material 200 can be melted;
It is formed on the side surface between the heating chamber 15 and the loading/unloading unit 12 and includes a drying chamber 16 for solidifying the melted powder paint,
A driven gear 115 is mounted on the upper end of the mounting bracket 114 so as to be rotatably mounted on the chain 113,
Further comprising a drive gear 116 interlocked with the driven gear 115 and a motor 117 rotating the drive gear 116,
The blowing fan 141 is disposed above the hopper 142 and the suction fan 143 is disposed below the hopper 142,
The suction fan 143 introduces outside air located on the upper side of the hopper 142 into the hopper 142, and the blowing fan 141 discharges the air inside the hopper 142 to the outside. ,
A first sensor mounted on the mounting bracket 114 detects the weight of the object 100 to be coated and senses the weight value, and a second sensor disposed on the motor 117 to sense the number of revolutions of the motor 117 And, further comprising an electronic control unit for receiving the weight value of the first sensor and the number of rotations of the second sensor and adjusting whether or not the blowing fan 141 and the suction fan 143 are operating and operating time,
The electronic control unit,
When the weight value of the first sensor of the object to be coated 100, which is the first condition, is more than a specific value and the number of revolutions of the second sensor is more than a specific value, the blowing fan is executed after powder coating by the spray nozzle 144 is executed. 141 and the suction fan 143 are both operated for a first time,
When the weight value of the first sensor of the object to be coated 100, which is the second condition, is greater than or equal to a specific value and the number of revolutions of the second sensor is less than a specific value, the blowing fan is executed after powder coating by the spray nozzle 144 is executed. 141 and the suction fan 143 are both operated for a second time shorter than the first time,
When the weight value of the first sensor of the object to be coated 100, which is the third condition, is less than a specific value and the number of revolutions of the second sensor is greater than or equal to a specific value, the powder coating is performed by the spray nozzle 144 and then the blowing air is performed. The fan 141 is not operated and only the suction fan 143 is operated for a first time,
When the weight value of the first sensor of the object to be coated 100, which is the fourth condition, is less than a specific value and the number of rotations of the second sensor is less than a specific value, after the powder coating is executed by the spray nozzle 144, the blowing air The powder coating system, characterized in that the fan 141 is not operated and only the suction fan 143 is operated for a second time.

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