KR101924764B1 - Automatic Painting System - Google Patents

Abstract

According to an embodiment of the present invention, an automatic painting system with a composite function comprises: a body formed by having a conveyor to horizontally move a jig; a contact point unit formed to horizontally protrude from one extended point to simultaneously contact the jig and a target object so as to remove static electricity from the target object fixed to the jig; a spraying unit starting an operation at a time when the jig passes the contact point unit and spraying constant pressure of air towards the target object; a heat sensing unit formed to sense a heat between the contact point unit and the spraying unit; and an extinguishing module formed on one side of the body to spray an extinguishing liquid when a heat with the preset temperature or higher is sensed through the heat sensing unit.

Description

{Automatic Painting System}

One embodiment of the present invention relates to an automatic painting system formed to be able to paint an object.

In the case of industrial products, which are usually produced in large quantities, almost all products are colored on the surface. This is to protect the surface of industrial products from corrosion or damage, and to provide aesthetics with the color itself. Usually, the product (or parts) to be painted is fixed with a jig and sprayed with paint such as paint on the area to be painted, Layer.

These paintings are classified into liquid coating and powder coating. Liquid painting is done by using a liquid paint brush or by spraying with a spray gun. The liquid paint using a brush has a disadvantage in that the surface after the painting is uneven. The paint using a spray causes a fine paint component to be blown in the air, Will influence.

In contrast, the powder coating is a special coating method for coating the product through a spray gun. The powder is sprayed evenly on the surface to be coated with the powder, and the paint is applied while dissolving by applying heat. Thus, Deposited, and the paint component does not spread to the atmosphere. Particularly, the powder coating system of the conveyor system is a powder coating facility for producing products while conveying the objects to the conveyor line. In this method, the objects are sprayed through the spray gun while automatically moving the objects on the conveyor line. At this time, a high voltage is applied to the tip of the spray gun, so that the discharged powder becomes negative (-) charged, and when the discharged powder reaches the object to be grounded, it is heated and melted and coated. The conveyor system is capable of high quality maintenance and mass production by automatic conveying by the conveyor, and it is possible to mass-scale the work because it focuses on mass production of low weight products.

In such a powder coating, a device capable of removing static electricity and dust from the objects to be painted and capable of extinguishing more quickly in the event of a fire can be considered.

Korean Patent No. 10-1793479 (Oct. 30, 2017)

It is an object of the present invention to provide an automatic painting system having a more improved structure and having a complex function.

According to an aspect of the present invention, there is provided an automatic painting system comprising: a body having a conveyor for moving a jig horizontally; A contact portion vertically extending from one side of the body and protruding horizontally at a point extending from the jig to remove static electricity from the object fixed to the jig and configured to contact the jig and the object at the same time; A jetting portion for jetting air at a predetermined pressure toward the object when the jig starts operating at a time point after the contact portion; A heat sensing part formed to sense heat between the contact part and the jet part; And a fire extinguishing module formed at one side of the body to fire the fire extinguishing liquid when heat of a predetermined temperature or more is sensed through the heat sensing part, wherein the fire extinguishing module includes: a spray liquid storage part; A guide part having an outlet of the spray liquid storage part inserted into and communicating with the inner part and forming a spiral groove along the inner periphery; And a fire extinguisher, wherein the fire extinguisher is stored in the spray liquid reservoir, and the fire extinguisher is stored in the fire extinguisher storage unit, and the fire extinguisher is formed at one side of the guide unit, the guide unit extends in a first direction from one side to the other side, Wherein the plurality of injection holes are formed to inject a fire extinguishing liquid in a second direction perpendicular to the first direction, the guide portion is coupled to be rotatable relative to the fire extinguishing portion, and the helical groove is formed in a region To the injection hole.

According to an embodiment of the present invention, the fire extinguisher is elastically supported on the body such that the guide protrudes from the body when the sensed temperature is above a predetermined temperature.

The automatic coating system according to at least one embodiment of the present invention configured as described above can reduce a defect rate due to static electricity during coating without using an antistatic agent and can rapidly evolve the occurrence of a topic.

1 is a conceptual view of an automatic painting system according to an embodiment of the present invention;
FIG. 2 is a conceptual diagram showing an example of the static elimination module shown in FIG. 1. FIG.
3 is a side view of the jig shown in Fig.
4 is a conceptual diagram of a fire extinguishing module according to an embodiment of the present invention;

Hereinafter, an automatic painting system according to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

The automatic coating system according to the embodiment of the present invention can be used not only in powder coating but also in liquid coating.

As the coating material used in the present invention, a UV curing coating material may be used. UV curing coatings include epoxy-acrylate oligomers modified with alcohol-soluble cellulose derivatives and hydrophilic acrylic monomers. UV curing coatings may also include EO (ethylene oxide) adducts such as 2- (2-Ethoxyethoxy) ethylacrylate, Ethoxylated hexanediol diacrylate, Ethoxylated Bispheol A Diacrylate, Polyethyene glycol acrylate, Propoxylated neopentyl glycol diacrylate, propoxylated glyceryl acrylate, propoxylated allyl methacrylate, propoxylated trimethylolpropane triacrylate, and the like. UV curing paints may also contain other amines, methoxy, alkoxylated acrylate, urethane acrylate, and the like. In the case of using a UV curing paint, a step of spraying an object and then irradiating UV is required.

As the paint used in the present invention, a thermosetting resin can be used. Examples of the thermosetting resin include an epoxy resin, a urethane resin, a silicone resin, a polyester, an alkyd resin, a modified epoxy resin, a modified urethane resin, a modified silicone resin, a modified polyester resin and a modified alkyd resin. The molecular weight of the resin used is preferably from 100 to 100,000. In this case, the coating can be obtained by spraying a thermosetting resin onto an object and then heating the object at a constant temperature. At this time, the heating temperature is not necessarily limited. For example, if heating to 150 캜 is sufficient for 30 minutes, heating at 100 캜 may be sufficient for 3 hours. However, the thermosetting resin is usually suitably heated at about 80 to 150 占 폚.

Further, as the paint, a resin of a spraying method (spray coating method) may be used. Such a coating method can be obtained by dissolving a resin in a solvent, spraying it on a target using a spraying machine, and then drying it by hot air to evaporate the solvent. The hot air drying temperature is not necessarily limited. For example, if heating at 150 ° C is sufficient for 30 minutes, heating at 120 ° C is possible for 1 hour. If left at room temperature for a long time, the solvent evaporates, leaving only the coated resin. However, the time is determined by the principles of manufacturing process and economy. In general, the resin that can be used in the spraying method may be a resin made of an acrylic silicone copolymer. The organic solvent is xylene, toluene, butyl acetate, ethyl acetate, cellosolve acetate, cocosol-100 and cocosol-150, and the like. That is, a resin made of an acrylic silicone copolymer is dissolved in the organic solvent and then coated on an object to form a resin layer. Another kind of resin that can be applied by spraying may be a polyester resin, an epoxy resin (bisphenol A type epoxy resin, or triglycidyl isocyanurate).

As a general coating method, it is possible to add an antistatic agent to the coating material. Typical antistatic agents include cationic surfactants and cationic polymer compounds. A method for producing an antistatic resin composition can be used, and paste or solidified type anionic antistatic agent such as alkali metal alkylsulfonate and nonionic antistatic agent such as polyalkylene glycol can be used. And, the anionic antistatic agent is generally obtained in paste or solidified state, and is used as it is without further processing to make it into liquid or powder state. The anionic antistatic agent is a phosphate or a sulfonate, preferably an alkali metal alkylsulfonate, particularly preferably sodium dodecylsulfonate. Examples of the nonionic antistatic agent include polyalkylene glycols, for example, polyethylene glycol or polypropylene glycol, and preferably polyethylene glycol.

The present invention can reduce the defective ratio at the time of coating by using the electrostatic elimination module described later without using such an antistatic agent.

FIG. 1 is a conceptual diagram of an automatic painting system according to an embodiment of the present invention, FIG. 2 is a conceptual diagram illustrating an example of the electrostatic elimination module shown in FIG. 1, FIG. 3 is a side view of the jig shown in FIG. 2 And FIG. 4 is a conceptual diagram of a fire extinguishing module according to an embodiment of the present invention.

1 to 4, the automatic painting system 100 may be formed by combining all or a part of a plurality of modules integrally.

The electrostatic elimination module 110, which is one of a plurality of modules, includes a body 111, a contact portion 112, and a jetting portion 113. The body 111 is formed with a conveyor 120 so that the jig 190 can move horizontally. The conveyor 120 may be formed to pass through the plurality of modules, respectively. Alternatively, a plurality of conveyors 120 may be formed so that a different conveyor 120 may be disposed for each module.

The contact portion 112 is formed to remove the static electricity of the object M. [ One side of the contact portion 112 is connected to the ground. The contact portion 112 extends vertically from one side of the body 111 and horizontally protrudes again at an extended point. In other words, the contact portion 112 extends vertically and is bent at one point and extends vertically. A brush may be formed on one side of the contact portion 112, and the brush is formed to contact the jig 190 and the object M at the same time. Thereby, the static electricity of the object M can be removed. Static electricity is simultaneously removed from the jig 190 and the object M and the object M is grounded through the jig 190 so that the object M can be grounded during powder coating.

The jig unit 113 receives a signal from the sensing unit 121 formed to detect the movement of the jig 190 and starts operating the jig 190 through the contact unit 112.

The sensing unit 121 may be formed of a sensor such as an infrared camera, and may sense a reflective surface formed on a stopper 195 described later. The sensing unit 121 may include a laser distance measuring sensor and an infrared camera to sense the forward and backward states of the stopper 195. The discharge direction of the jetting section 113 is directed toward the upper portion 192 of the jig 190 while the stopper 195 is advanced and the jig in the discharge direction of the jetting section 113 190). Here, the advancing state means a state in which the stopper 195 is inserted into the groove along the through hole, and the backward state means a state in which the stopper 195 has escaped from the groove. The control unit (not shown) moves the jetting unit 113 up and down according to the result detected by the sensing unit 121. The control unit may be formed on the printed circuit board of the body 111 in the form of a micom.

The jetting section (113) is formed so as to jet air at a constant pressure toward the object (M). Dust can be removed from the object (M) by injection of pressure. The jetting section (113) is coupled to the body (111) so as to be movable up and down. The jetting section 113 may be formed to be slidable with respect to the body 111. The jetting section 113 can be fixed to the body 111 in a moving state.

In practice, the painting of the object M is performed inside the first to third modules 130, 140 and 150. After the painting is completed, the object M moves along the conveyor 120. The object M passes through the ultraviolet module 160, the heating module 170 and the cooling module 180. Ultraviolet irradiation, heating and cooling of the object M are performed in the respective modules 160, 170 and 180 .

The first module to the third module 130, 140, and 150 eject paint through an ejection port formed of a spray gun when the object M is transferred. The injection port is rotatably formed or reciprocatably movable, and moves in conjunction with the conveyor 120. For example, the injection port of the first module 130 rotates about a first axis, and the injection port of the second module 140 rotates in a direction crossing the first axis. The injection port of the third module 150 is formed to reciprocate along one of the axes. Whereby the object M can be painted three-dimensionally. Each injection port is formed to move in conjunction with the conveyor 120. As the conveyor 120 moves, a gear coupled to the conveyor 120 moves the injection port. Alternatively, the movement of the conveyor 120 can be sensed, and the operation motor coupled to the ejection opening can move the ejection opening. The operation of the injection port and the conveyance of the object M can be controlled by the control unit that controls the operation as a whole.

The jig 190 of the present invention is formed such that when the dust is removed from the object M, the upper portion 192 is rotated with respect to the lower portion 191 by the air pressure discharged from the jet portion 113. Due to the air discharge of the jetting section 113, the upper part 192 rotates and a centrifugal force is generated. The dust can be removed by such centrifugal force. The reason why the centrifugal force is generated in this manner is that, in the case of a specific object M, the object M can be broken by the air pressure discharged from the jetting section 113. [ That is, the dust accumulated in the object M is removed only by the centrifugal force. Further, the jetting section 113 is formed to be movable up and down from the body 111. Thus, air can be discharged to the upper portion 192 of the jig 190.

The jig 190 may be divided into a lower portion 191 and an upper portion 192. The lower portion 191 is seated in the conveyor 120 and the upper portion 192 is rotatably coupled to an axis 193 projecting from the lower portion 191. The upper portion 192 is formed with fixing portions 194 on one surface thereof so that the object M can be fixed.

The temperature of the room where the automatic painting system is disposed is high, and a fire may occur on the object charged by the static electricity when the dust is large. The present invention is equipped with a heat sensing part and a fire extinguishing module so that such fire can be quickly suppressed. The heat sensing part and the extinguishing module can be formed on the body.

The thermal sensing unit 250 may be a thermal sensing sensor configured to sense heat from an object moving along the conveyor.

The fire extinguishing module 200 may be formed at one side of the body 111 to spray the fire extinguishing liquid toward the object moving along the conveyor when the temperature sensed through the heat sensing part 250 is higher than a predetermined temperature.

4, the extinguishing module 200 may include a jetting liquid storage unit 211, a guide unit 213, and a fire extinguishing unit 215.

First, the injection liquid storage unit 211 may be a container for storing the extinguishing liquid to be injected.

Next, one side of the guide portion 213 communicates with the outlet 212 of the spray liquid storage portion 211, and a helical groove may be formed along the inner periphery.

Here, the outlet 212 is located in the region where the spiral groove starts, and may be formed to be deviated to one side from the center of the extinguishing unit 215 so as to generate a vortex when the extinguishing liquid is injected along the spiral groove.

Accordingly, the guiding portion 213 can disperse the extinguishing liquid delivered from the spray liquid storage portion 211 through the spiral groove along the inner periphery into the interior of the vehicle without requiring a rotational power for dispersing the extinguishing liquid. .

At this time, the extinguishing unit 215 is formed at the one side of the guide unit 213, and can extinguish the extinguishing liquid stored in the injection liquid storage unit 211 along the spiral groove of the guide unit 213 through the outlet. In the present invention, the configuration in which the extinguishing unit 215 injects the extinguishing liquid stored in the injected liquid storage unit 211 to the outlet 212 is an explanation of the function of a general extinguisher, and a description thereof will be omitted.

The guide portion 213 extends in the first direction from one side to the other side. The guide unit 213 may further include a plurality of ejection holes 216-1 to 216-N formed to eject the digestive liquid in a second direction perpendicular to the first direction.

That is, since the extinguishing module 200 can disperse the extinguishing liquid around the object through the plurality of injection holes 216-1 to 216-N along the spiral groove from the spray liquid storage part 211, There is an effect that early suppression against a fire which can be spread to an area other than the area can be effected.

The body 111 may be provided with an elastic part 225 which elastically supports the fire extinguishing module 200 on one side so that the fire extinguishing part 215 protrudes from the body 111. [

That is, when the predetermined temperature or more is sensed through the heat sensing unit 250, the fire extinguishing module 200 applies the elastic part 225 to one side of the inside of the body 111 so that the fire extinguisher 215 protrudes from the body 111, As shown in FIG.

According to an embodiment, the main body 110 further includes a motor (not shown) for driving the fire extinguishing unit 215 to rotate. At this time, the control unit 130 determines whether the temperature sensed through the sensing unit 120 is preset The fire extinguishing unit 215 may be driven to rotate through a motor (not shown) when the fire extinguishing liquid is sprayed, so that the guide unit 213 can be relatively rotated.

According to another embodiment, the body 111 may further include rod portions 221 and 222 which are inserted into the latching portions 223 and 224 formed on the fire extinguishing portion 215 on both sides.

Here, the rod portions 221 and 222 may be in the form of an electric or hydraulic cylinder which is formed to be movable from the latch portions 223 and 224 according to the temperature sensed through the heat sensing portion 250.

The fire extinguishing module 200 moves the rod portions 221 and 222 away from the latch portions 223 and 224 when the temperature sensed through the sensing portion 250 is higher than a predetermined temperature, 225 through the plurality of injection holes 216-1 to 216-N along the spiral groove of the guide portion 213 protruding from the body 111, At the same time, there is an effect that the risk of fire spreading to a wide area can be prevented in advance.

The automatic painting system described above can be applied to a configuration and a method of the embodiments described above in a limited manner, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

Claims (2)

An automatic painting system for spraying a paint through a spray gun mounted inside a plurality of modules when an object is transferred,
The automatic painting system includes:
A body formed adjacent to the plurality of modules and having a conveyor for allowing the jig to move horizontally;
A contact portion vertically extending from one side of the body and protruding horizontally at a point extending from the jig to remove static electricity from the object fixed to the jig and configured to contact the jig and the object at the same time;
A jetting portion for jetting air at a predetermined pressure toward the object when the jig starts operating at a time point after the contact portion;
A heat sensing part formed to sense heat between the contact part and the jet part; And
And a fire extinguishing module formed on one side of the body to emit the fire extinguishing liquid when heat of a predetermined temperature or more is sensed through the heat sensing part,
The fire extinguishing module comprises:
A spray liquid storage;
A guide part having an outlet of the spray liquid storage part inserted into and communicating with the inner part and forming a spiral groove along the inner periphery; And
And a fire extinguishing unit built in one side of the guide unit,
Wherein the guide portion extends in a first direction from one side facing the fire extinguishing portion to the other side, the guide portion has a plurality of injection holes, and the plurality of injection holes inject a fire extinguishing liquid in a second direction perpendicular to the first direction Respectively,
Wherein the guide portion is coupled to the fire extinguishing portion so as to be rotatable relative to the fire extinguishing portion,
Wherein the spiral groove extends from the region where the outlet is located to the injection hole.
2. The apparatus according to claim 1,
Wherein the guide part is elastically supported on the body so that the guide part protrudes from the body when the temperature sensed through the heat sensing part is equal to or higher than a predetermined temperature.

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