KR20100124608A - 3-layers coating apparatus and method for resin powder - Google Patents

Abstract

PURPOSE: A 3-layer coating apparatus and a method for resin powder are provided to quickly form a uniform coating layer. CONSTITUTION: A 3-layer coating apparatus comprises a conveying unit(110), a coating unit(130), an intake part(140), and a circulating unit(150). The conveying unit selectively transfers by a constant temperature. The coating unit is arranged in the outside of the conveying unit. The flow tub(131) in which the mixed air of the synthetic resin powder which is coated since the air is uniformly provided from the lower part and the surface to be coated is completely involved in the top is formed is included.

Description

Apparatus for triple coating of synthetic resin powder and triple coating method using the same {3-layers coating apparatus and method for resin powder}

The present invention relates to an apparatus for triple coating of synthetic resin powder and a triple coating method using the same, and more particularly, for triple coating of synthetic resin powder, which improves the efficiency and profitability of the coating process, and the durability and weatherability of the coated coating. An apparatus and a triple coating method using the same.

In general, powder resin (synthetic resin powder) is formed of a synthetic resin-based material such as polyethylene (polyethylene) or polyamide (polyamide) in the form of a powder, the synthetic resin powder is applied to the coating of metal, nonferrous and post-processing materials It is widely used in the home appliance, construction, automobile industry, offshore plant (plant) business, water, sewage and oil and gas industry for the purpose of maintaining the durability of coatings, corrosion prevention, etc.

On the other hand, the coating method using the powder resin, that is, synthetic resin powder is typically the electrostatic coating method and flow deposition method.

The former electrostatic coating method is to form a coating layer by spraying the synthetic resin powder on the coating object using a spray gun, which is applied to the coating object of which the shape of the coating is complicated or the color is severely changed. Due to its low installation cost and easy automation, its use range is wide and varied, so it is most commonly used.

However, the electrostatic coating method has a disadvantage in that it cannot form a uniform coating layer and has a disadvantage in that it does not exhibit satisfactory quality for large coatings requiring strong weatherability and adhesiveness by forming a low coating film of 30 to 250 microns. .

The latter flow dipping method (dipping method) is to form a coating layer by impregnating and rotating a heated coating material in a tank containing a synthetic resin powder, and this dipping method is a uniform coating layer compared to the electrostatic coating method described above. There is an advantage that can be obtained.

However, as the large coatings were rotated to obtain a uniform coating layer, the related equipment became complicated and the economic burden was incurred at the expense of the complicated equipment. As the coating time was delayed by the rotation, the heated coating was replaced with other components. Moving to several tanks containing powder, there was a problem that is not suitable for the process of forming a coating layer of a laminated structure.

In addition, the flow deposition method is that the size of the synthetic resin powder is loaded in the tank in a colloidal state, the powder is shaken when the entrance and exit of the coating material is dispersed to the outside through the opening of the tank to contaminate the workplace or to form a laminate of the powder There was a problem of contaminating the tank containing the powder of the other components to be deposited.

In addition, in order to compensate for the disadvantages of the electrostatic coating method and the flow deposition method, it was considered to use both in parallel, but it is applied to a large coating which requires a structure in which the coating layer is laminated in several layers of low coating layer for strong weather resistance and durability. In the following, there was a time and equipment limitation for smoothly forming a laminated coating layer on a heated large coating.

On the other hand, in the case of coating the steel pipe, the parts requiring welding at both ends are masked to prevent deterioration and combustion of the synthetic resin due to heat during welding.

By the way, the conventional masking operation is masked with a heat-resistant tape before heating the steel pipe and then connected by the lifting device is coated, and then the masking of the steel pipe, such as separating the heat-resistant tape after releasing the lifting device before cooling the coated steel pipe By overlapping the site for the lifting work site, the coating work is complicated and there is a problem that the workability is deteriorated as a safety problem that requires the care of separating the tape from the heated workpiece.

In order to solve the above problems, the present invention improves the efficiency and profitability of the process by performing a simplified operation using only the dipping coating, as well as by recycling the synthetic resin powder and improving the environment, and smoothly coating the layer of the three-layer laminated structure. It is an object of the present invention to provide a device for triple coating of synthetic resin powder which is formed to improve durability and weatherability of a coating material, and a triple coating method using the same.

In order to solve the above problems, the present invention provides a transfer unit for selectively transferring the object heated to a certain temperature; A coating unit disposed on an outer side of the transfer unit and having a flow tank in which air is uniformly supplied from a lower portion of the transfer unit so that the mixed air of synthetic resin powder is formed by completely containing the coated object; An intake part provided surrounding the upper end of the flow tank and forming a collection space to collect the mixed air discharged toward the edge of the flow tank; And a circulation means communicating with the flow tank and the intake unit, and having a pneumatic member for injecting high-pressure air to the flow tank side to circulate the mixed air collected in the intake unit to the inside of the flow tank on one side. An apparatus for triple coating of a synthetic resin powder is provided.

Here, it is preferable that one side of the circulation means is further provided with a dust collecting tank for relieving the air pressure by separating and discharging the air by the air discharge portion of the mixed air collected from the intake portion, the synthetic resin powder is precipitated. In addition, the circulation means is connected to the lower end of the flow tank from the lower surface of the intake base, it is preferable that a plurality of dogs are arranged at equal intervals along the lower surface of the intake portion. Furthermore, it is preferable that the transfer unit is provided with a masking binding member for binding the lifting end to mask the end of the workpiece.

On the other hand, the masking connection step of automatically masked by the rotation is automatically bound to the masking binding member so that the pretreated and heated workpiece is connected to the transfer unit; An impact absorbing layer coating step of completely immersing the workpiece in the epoxy powder layer of the coating unit in which the epoxy powder is floated by the transfer unit connected in the masking connection step; An adhesive layer coating step of completely immersing the modified polyethylene powder layer by moving the coating material subjected to the impact absorbing layer coating step to the coating unit having the modified polyethylene powder floating therein; And a three-layer coating method using an apparatus for triple coating of a synthetic resin powder, comprising a coating layer of a corrosion resistant layer which is completely immersed in a polyethylene powder layer by moving the coated object which has undergone the adhesive layer coating step to the inner surface of the polyethylene powder. to provide.

The present invention provides the following effects through the above solution.

First, the present invention is completely coated with a large coating material in the uniform mixed air layer of the synthetic resin powder only by the dipping process, it is possible to quickly form a uniform coating layer as compared to rotating the existing large-sized coating material in the mixed air layer other It is suitable for the process of forming a coating layer of a three-layer laminated structure by transferring to various flow tanks containing the synthetic resin powder of the component.

Second, by providing the intake portion and the circulation means for collecting the mixed air discharged to the outside of the flow tank and supplying it back to the inside of the flow tank, to prevent contamination due to the synthetic resin powder discharged to the outside, the synthetic resin powder is circulated so Cost savings from recycling can improve profitability.

Third, one side of the circulation means is provided with a pneumatic member for injecting the flow of the mixed air to inject a high pressure air to the flow tank side, thereby preventing the back flow of air from the flow tank side and maintains a constant circulation flow rate of the mixed air The synthetic resin powder can be stably resupplyed.

Fourth, the one side of the circulation means is further provided with a dust collecting tank for separating and discharging the air of the mixed air and the synthetic resin powder is settled, the mixed air is further stabilized by buffering the pressure of the compressed mixed air discharged from the inside of the flow tank synthetic resin powder This can be resupplyed more stably.

Fifth, the coating layer is a coating layer of epoxy powder for protection of the tube, modified polyethylene powder for adhesion, and polyethylene powder having excellent weather resistance are sequentially dip coated to provide a three-layer laminated structure, which significantly increases the durability and weatherability of the coated object. Can be improved.

Sixth, the transfer unit is provided to move the large sized object up and down to be completely deposited in the mixed air layer of the synthetic resin powder, eliminating the related equipment for rotating after partially depositing the existing large sized object to minimize the capacity of the transfer unit Since the economic burden on the facility is simplified, and large workpieces are moved up and down, it can be used to coat the release pipe corresponding to the elbow type or T-shaped pipe fittings.

Seventh, by providing a masking binding member for binding and lifting the end of the workpiece, because the masking and the lift device is used in combination, the operation can be simplified and the efficiency of the process can be significantly improved.

Eighth, since the masking binding member is automatically bound by using the repulsive force due to the rotation of the seated object, it is easy to combine and release, and the insulation surface is provided on the contact surface with the workpiece, so that the heat of the heated workpiece is transferred to the masking binding member. Since the masking binding member is prevented from being contaminated with the synthetic resin powder, it is possible to prevent waste of the synthetic resin powder.

Hereinafter, with reference to the accompanying drawings will be described in detail a coating apparatus of a synthetic resin powder according to a preferred embodiment of the present invention.

1 is a front view showing an apparatus for triple coating of a synthetic resin powder according to a preferred embodiment of the present invention, Figure 2 is a dipping coating operation state of the apparatus for triple coating of a synthetic resin powder according to a preferred embodiment of the present invention Front view shown. In addition, Figure 3 is a plan view showing the arrangement of the circulation means in the apparatus for triple coating of synthetic resin powder according to a preferred embodiment of the present invention.

As shown in Figures 1 and 2, the apparatus 100 for the triple coating of synthetic resin powder according to a preferred embodiment of the present invention transfer unit 110, masking binding member 120, coating unit 130, intake It comprises a portion 140 and the circulation means 150.

In detail, the transfer unit 110 selectively moves the workpiece 10 heated to a predetermined temperature, and the transfer unit 110 wound the wire 111 connected to the workpiece 10 according to the operation of the regulator. A crane 113 having a winch 112 for raising and lowering 10 and a hydraulic cylinder 114 for horizontally moving the object 10 that is horizontally installed and lifted and lowered. It is configured by. That is, the workpiece 10 is horizontally moved by the operation of the hydraulic cylinder 18 in the heated state, vertically moved by the operation of the winch 14 and moved to the coating units more quickly, thereby reducing heat loss during the movement. It can be minimized.

Here, the transfer unit 110 to selectively move the workpiece 10 is the horizontal and vertical of the workpiece 10 according to the arrangement structure of the plurality of coating unit 130 containing the synthetic resin powder of different components It is not limited to being moved, which means that it can be moved in various ways.

On the other hand, there is provided a masking binding member 120 that is detachably connected to the transfer unit 110, the masking binding member 120 binds so as to mask and lift the end of the workpiece (10).

Here, the masking binding member 120 is preferably made of a steel (steel) of a circular ring shape, it is connected to the end of the wire (111). At this time, the masking binding member 120 is used in a number of pieces so that the workpiece 10 is stably transported, it is provided at both ends in the case of a straight steel pipe, three in each open end in the case of a T-shaped steel pipe of the release pipe As it is provided, it is preferable that the workpiece 10 is connected to the minimum number of sealing the openings while being horizontal without shaking when the workpiece 10 is moved. In addition, the masking binding member 120 is preferably provided separately according to the size, shape of the workpiece 10 for a stable coupling, for this purpose, the masking binding member 120 is detachable to the wire 111. It is provided.

Thus, by providing a masking binding member 120 for binding and lifting the end of the workpiece 10, since the binding for the lifting as well as the masking is made at the same time, the coating work can be simplified and the efficiency of the process can be significantly improved. . Through this, productivity can be significantly improved by performing a rapid process.

On the other hand, the coating unit 130 is disposed on the outer side of the transfer unit 110, the coating unit 130 is coated by air is supplied uniformly from the bottom to the upper part 10 is completely coated A flow tank 131 in which the mixed air of the synthetic resin powder 20 is formed is provided.

In detail, the coating unit 130 is a flow tank 131 in which a suitable amount of the synthetic resin powder 20 is stored therein, and the air supplied from the blower 134 is located below the flow tank 131 to the flow Air box 132 to discharge to the bottom of the tank 131. At this time, the inside of the air box 132 is a partition (133) having a planar "+" shape is installed to form a space therein, it is preferable to configure by connecting the blower 134 for each of the partitioned space This is to ensure that the air discharged to the flow tank 131 through the air box 132 is not only biased to one side, but is evenly distributed and discharged to the entire bottom of the flow tank 131.

In addition, an air plate 135 and a mesh plate 136 are sequentially installed between the flow tank 131 and the air box 132. Here, the air plate 135 is located on the top of the air box 132 to filter the foreign matter contained in the air in the process of passing the air discharged from the air box 132. In this case, the air plate 135 is preferably made of polyester fabric (Polyester fabric). In addition, the mesh plate 136 is a porous structure, and has a function of uniformly discharging air passing through the air plate 135 into the flow tank 131.

On the other hand, when describing the operating state of the coating unit 130 of the above-described configuration, the coating unit 130, the air supplied from the blower 134, the air plate 135 and the mesh plate via the air box 132 After passing through the 136 in sequence, the uniformly discharged to the bottom of the flow tank 131, the synthetic resin powder 20 stored in the flow tank 131 is a flow tank at the discharge pressure of the air in a mixed state with air A certain height is raised from the bottom of the 131, and in this state, the workpiece 10 is introduced into the flow tank 131 according to the operation of the transfer unit 110 described above, thereby allowing the workpiece 10 to flow into the flow tank 131. The coating process may be performed to uniformly form a coating film (coating film) on the workpiece 10. Here, the mixed air means that the synthetic resin powder 20 is mixed with air.

On the other hand, the coating 10 is preferably made of a three-layer laminated structure of a uniform coating film for strong weather resistance and durability, for this purpose, if the coating 10 is completely contained in the layer of the synthetic resin powder 20 to be coated at once Can be. In detail, the synthetic resin powder 20 is mixed with air and floated as a flowable layer, so that the air mixed with the powder moves the outer surface of the coated object 10 as the object 10 is injected downward. 20) is uniformly in contact with the whole of the workpiece 10, a uniform coating layer is formed at one time.

Therefore, the present invention can be formed by coating the coating 10 is completely contained in the uniform layer of the synthetic resin powder 20 only by the dipping process, it is possible to quickly form a uniform coating layer as compared to rotating the existing coating in the flow tank It is suitable for a process of forming a coating layer of a three-layer laminated structure while moving to several flow tanks containing powders of different components.

In addition, the object 10 is completely deposited to form a uniform coating film at a time, the transfer unit 110 is provided to move the object 10 up and down. Through this, the related equipment for rotating after partially depositing the existing workpiece is deleted, thereby minimizing the capacity of the transfer unit 110 to simplify the equipment, thereby reducing the economic burden on the equipment, and the workpiece 10 is moved up and down. Since it is moved, it can be utilized for coating of a release tube corresponding to a pipe fitting such as an elbow type or a T-shape.

On the other hand, there is provided an intake unit 140 surrounding the upper end of the flow tank 131, the intake unit 140 forms a collection space so that the mixed air discharged to the edge side of the flow tank 131 is collected. .

3, the intake unit 140 is preferably formed in a rectangular shape corresponding to the edge of the flow tank 131, and is preferably made of a plate as a durable and lightweight material. The intake unit 140 is provided to surround the upper portion of the flow tank 131 by a predetermined distance to effectively prevent the discharge of the mixed air to the outside. The lower surface of the intake portion 140 is provided to be inclined, it is also possible to incline in a funnel manner.

On the other hand, there is provided a circulation means 150 for communicating the flow tank 131 and the intake unit 140, the circulation means 150 is the flow tank collected in the intake unit 140 in the flow tank 131 is circulated inside.

here, The circulation means 150 is a circulation pipe 151 and a pneumatic member 152 for injecting high-pressure air to the flow tank 131 to circulate by inducing the flow of the mixed air inside the circulation pipe 151. It is preferred to include). The circulation pipe 151 refers to a general pipe, and becomes a passage communicating from the intake portion 140 to the flow tank 131.

In addition, the pneumatic member 152 is a device for injecting high pressure air into the circulation pipe 151, a supply member (not shown), such as a compressor for supplying compressed air, is connected to the supply member and the circulation It is inserted into one side of the tube 151 and comprises an insertion hose 152a for injecting high pressure air into the circulation tube 151.

Therefore, one side of the circulation means 150 is provided with a pneumatic member 152 for inducing the flow of the mixed air to inject a high pressure air to the flow tank 131 side, the backflow phenomenon of air from the flow tank 131 side And keeps the circulation flow rate of the mixed air constant so that the synthetic resin powder 20 can be stably resupplyed.

Furthermore, referring to FIG. 3, the circulation means 150 is connected to the lower end of the flow tank 131 from the lower surface of the intake unit 140, and a plurality of the circulation means 150 are the same along the lower surface of the intake unit 140. Preferably arranged at intervals. Through this, all the mixed air discharged from the flow tank 131 can be efficiently collected, and the synthetic resin powder can be effectively prevented from being lost to the outside.

And, referring to Figure 2 describes the circulation of the mixed air by the intake unit 140 and the circulation means 150, the intake unit 140 is discharged to the outside from the opening of the flow tank 131 Collect the mixed air. At this time, the workpiece 10 is moved downward by the transfer unit 110 and completely deposited on the layer of the synthetic resin powder 20, and thus the synthetic resin powder 20, which is shaken due to the inflow of the workpiece 10 and dispersed upward, is also collected. can do.

Thereafter, the collected mixed air is circulated by being supplied back to the inner lower portion of the flow tank 131 along the circulation means 150 communicated from the lower surface of the intake unit 140 to the flow tank 131. At this time, one side of the circulation means 150 is provided with a pneumatic member 152 for injecting high-pressure air to the flow tank 131 through the insertion hose 152a to facilitate the circulating flow of the mixed air. Accordingly, the air supplied from the lower side of the flow tank 131 enters into the communication hole between the circulation pipe 151 and the flow tank 131, thereby preventing the mixed air from flowing backward.

As described above, the synthetic resin powder is discharged to the outside by being provided with an intake unit 140 and the circulation means 150 to collect the mixed air discharged to the outside of the flow tank 131 and to supply again to the inside of the flow tank 131. Prevents contamination due to, and because the synthetic resin powder 20 is circulated can reduce the cost of recycling the synthetic resin powder can be improved profitability.

Figure 4 is a front view showing a device for triple coating of synthetic resin powder according to another embodiment of the present invention.

Since the basic configuration of this embodiment is the same as the above-described embodiment, a detailed description thereof will be omitted.

As shown in FIG. 4, one side of the circulation means 450 separates and discharges the mixed air collected from the intake unit 140 by an air discharge unit 454 to relieve air pressure and precipitate the synthetic resin powder. It is preferable that a dust collecting tank 453 is further provided.

Here, the air discharge part 454 includes a filter 454a and a discharge fan 454b which are provided on one side of the upper part of the dust collecting tank 453. Thus, the discharge fan 454b is operated to suck the mixed air flowing into the upper portion of the dust collecting tank 453, and passes only the air through the filter 454a. By the suction action of the discharge fan 454b of the air capable of collecting the synthetic resin powder inside the circulation pipe 451 connecting the intake unit 140 and the dust collecting tank 453 and the inside of the intake unit 140 Since the suction flow is generated, the mixed air discharged upward through the opening of the flow tank 131 may be effectively collected to more effectively prevent the synthetic resin powder from being lost to the outside through the upper side of the intake unit 140. Moreover, this suction flow can also effectively suck the synthetic resin powder 20 that is not dissolved on the surface of the coating object 10 to be transported upward after the coating process is completed. Through this, the coated coating 10 can be prevented from being contaminated to contaminate the flow tank containing the synthetic resin powder of other components. In addition, the circulation pipe 451 is connected to the flow tank 131 through the dust collecting tank 453 and the pneumatic member 452 sequentially from the intake portion 140.

When the operation of the dust collecting tank 453 is described, the mixed air flowing into the upper portion of the dust collecting tank 453 from the intake unit 140 passes through the filter 454a by the suction operation of the discharge fan 454b. This is discharged to the outside, and the resin powder is deposited at the bottom. At this time, the air pressure of the mixed air made of compressed air is relaxed, and low pressure airflow is formed inside the dust collecting tank 453. Subsequently, the pneumatic member 452 injects the high pressure air to the flow tank 131 through the insertion hose 452a through the circulation pipe 451 communicated with the lower end of the dust collection tank 453. Synthetic resin powder laminated to the bottom of the is supplied back to the flow tank 131 in the form of mixed air mixed with air. Therefore, the inside of the dust collecting tank 453 is a low pressure airflow and the other circulating portion is formed at a high pressure, whereby the circulation of the mixed air can be further stabilized.

In other words, by recycling the synthetic resin powder by this circulation process it can be prevented to be lost to the outside. Through this, it is possible to prevent contamination of the workplace and to prevent the contamination of the synthetic resin powder leaking to the outside into the flow tank including the synthetic resin powder of the other components in forming the coating layer of the laminated structure.

As described above, one side of the circulation means 450 is further provided with a dust collecting tank 453, which separates and discharges the air of the mixed air and precipitates the synthetic resin powder, thereby compressing the mixed air discharged from the inside of the flow tank 131. By buffering the pressure, the mixed air is more stable, so that the resin powder can be more stably resupplied.

On the other hand, Figure 5 is a perspective view showing a state before the coating is bound to the masking binding member of the apparatus for triple coating of the synthetic resin powder according to a preferred embodiment of the present invention, Figure 6 is a synthetic resin powder according to a preferred embodiment of the present invention Is a perspective view showing a state in which the workpiece is bound to the masking binding member of the three-coating device. In addition, Figure 7 is a perspective view showing a state in which the workpiece is separated from the masking binding member after the coating treatment of the apparatus for triple coating of the synthetic resin powder according to an embodiment of the present invention.

As shown in FIGS. 5 and 6 to 7, the masking binding member 120 is made to be automatically bound by rotating the workpiece 10 seated inside thereof, and is masked between the workpiece 10 and the workpiece 10. Insulating member 126 of the flexible material is preferably provided to enable.

Furthermore, the masking binding member 120 is formed in a ring shape in which the rotating member 121 and the semi-rotating member 123 are integrally formed with the blocking member 125 so as to surround the outer surface of the workpiece 10. Expanding member 122 for expanding the space between the rotary member 121 and the anti-rotation member 123 and the locking member 124 that is automatically locked by the reaction force by the anti-rotation of the anti-rotation member 123 It is preferable to include.

Here, the masking binding member 120 has an inner side surface corresponding to the outer side surface of the end portion of the workpiece 10 and is divided into at least four or more and is coupled by the fastening member 127, respectively. Accordingly, the heat insulating member 125 is also divided and provided to be compressed without omission in the appearance of the workpiece 10. In addition, the expansion member 122 prevents deterioration of accessibility due to shaking of the workpiece 10 and being caught by the semi-circular semi-rotating member 123 when the workpiece 10 is seated on the rotating member 121. The space between the rotating member 121 and the semi-rotating member 123 is expanded to facilitate access. In addition, the locking member 124 is bound by the locking groove 124a is automatically locked to the locking portion 121a by the repulsive force in which the anti-rotation member 123 is rotated in response to the rotation of the workpiece 10. In addition, the blocking member 125 is to close the opening of the end portion of the object 10, such as a steel pipe close to block the opening so that the synthetic resin powder 20 of the coating material into the inner diameter of the steel pipe is blocked. Of course, the blocking member 125 may not be provided when the coating is made on the inner and outer surfaces of the steel pipe.

Then, when the operation of the binding of the masking binding member 120 is described, the end of the workpiece 10 is rotatable integrally with the rotating member 121 and the blocking member 125 on the upper portion of the rotating member 121. At this time, the opening of the end portion is in close contact with the blocking member 125 and is clogged. As the seat 10 is rotated, the rotating member 121 and the blocking member 125 rotate together, and the expansion member 122 is rotated. Overlaid on the object 10 while being superimposed on the rotating member, the object 10 presses one end of the semi-ring-shaped semi-rotating member 123 connected to the end of the expansion member 122, and thus the anti-rotating member 123 is pressed. By the anti-rotation by the rebound force is the locking member 124 is the maximum rebound is caught.

That is, as shown in the masking connection, the masking binding member 120, the blocking member 125 is in close contact with the opening of the end of the workpiece 10 and the rotating member 121 wraps the lower part of the workpiece 10 Approaching (10) and rotating the workpiece 10 in the clockwise direction as an arrow, the expansion member 122 and the anti-rotation member 123 is automatically wound on the outer surface of the workpiece 10, which is automatically caught by the repulsive force Is made by

In addition, the masking disconnection is rotated in the counterclockwise direction while pulling the locking member 124 of the locking groove 124a portion in the outward direction, the workpiece is automatically separated. At this time, referring to Figure 5, the coating 10, the coating layer (10a) and the original layer (10b) is formed at the end, it can prevent the degradation and combustion of the synthetic resin when welding the steel pipes.

As such, the masking binding member 120 is automatically engaged by using the reaction due to the rotation of the seated object 10, so that the masking binding member 120 is easily coupled and released, and the insulating member 125 is provided on the contact surface with the workpiece 10. Since the heat of the workpiece 10 heated to the masking binding member 120 is blocked, the masking binding member 120 is prevented from being contaminated with the synthetic resin powder 20, and thus the amount of the synthetic resin powder 20 is also reduced. Can be.

Hereinafter, with reference to the accompanying drawings will be described in detail the triple coating method of the coating device of the synthetic resin powder according to an embodiment of the present invention.

Figure 8 is a schematic diagram showing the arrangement of the transfer unit and the coating unit for the triple coating method using the apparatus for triple coating of the synthetic resin powder according to a preferred embodiment of the present invention, Figure 9 is in accordance with a preferred embodiment of the present invention It is a flowchart which shows the triple coating method using the triple coating apparatus of synthetic resin powder.

As shown in FIG. 8, the apparatus for triple coating of synthetic resin powder according to the present invention includes a transfer unit 110 between coating units 130 including another synthetic resin powder to form a coating film having a three-layer laminated structure. Placement and transfer unit 110 is rotated and the water 10 is moved up and down can be sequentially dipping coating.

On the other hand, as shown in Figures 1 and 9, the triple coating method using the apparatus for triple coating of the synthetic resin powder according to a preferred embodiment of the present invention is a masking connection step (S630), shock absorbing layer coating step (S640), It comprises an adhesive layer coating step (S650) and corrosion-resistant layer coating step (S660).

In detail, the masking connection step (S630) is automatically bonded and masked by rotation to the masking binding member 120 so that the pretreated and heated workpiece 10 is connected to the transfer unit 110.

Here, the pretreatment and heating of the workpiece 10 is to remove foreign substances such as rust through a pretreatment process such as a shot blast to increase the surface area to improve adhesion and quality (S610) and the workpiece 10 By raising the temperature of the synthetic resin powder 20 is melted on the surface is made by performing a heating step (S620) to apply heat to the workpiece 10 in the heating furnace to be coated. The heating temperature is preferably in the range of 250 ° C to 300 ° C.

On the other hand, the shock-absorbing layer coating step of completely immersing the workpiece 10 in the epoxy powder layer of the coating unit 130 in which the epoxy powder is floating inside by the transfer unit 110 connected in the masking connection step (S610) (S640) ) Is performed.

Here, the impact absorption layer coating step (S640) is a step of forming a coating layer for the protection of the tube as a coating layer.

On the other hand, the adhesive layer coating step (S650) to completely immersed in the modified polyethylene powder layer by moving the coating 10 through the impact-absorbing layer coating step (S640) to the coating unit 130 on which the modified polyethylene powder is floating. do.

On the other hand, the coating layer (S650) through the adhesive layer coating step (S650) is moved to the coating unit 130 in which the polyethylene powder is floated on the inside corrosion resistant layer coating step (S660) is completely immersed in the polyethylene powder layer.

Here, after the anti-corrosion layer coating step (S660), the masking disconnection step (S670) for cooling the workpiece 10 and then disconnecting the masking binding member 120 is performed. Cooling of the workpiece 10 is preferably natural cooling in the air to prevent a decrease in adhesion between the workpiece 10 and the coating layer. Since the masking binding member 120 is released after cooling, a safety accident in operation may be prevented. Of course, if the coating layer of the coated object 10 after cooling is damaged by an external impact, a repair step (not shown) may be further provided to repair the damaged coating layer using the powder coating film and the iron.

And, after the coating step (S640, S650, S660) of each of the coating material to enhance the adhesion, the appearance is beautiful and the post-heating step of post-heating by heating means such as gas torch to prevent the mixing between different powders It is preferable that (S645, S655, S665) be further performed.

On the other hand, the coating steps (S640, S650, S660) is the mixed air by the synthetic resin powder 20 by the intake unit 140 and the circulation means (150, 450) inside the flow tank 453 It is preferably carried out in parallel with a circulation step (not shown) which is resupplied to the floated mixed air layer.

As described above, the coating 10 is coated with an epoxy powder for protecting a tube, a modified polyethylene powder for adhesion, and a polyethylene powder having excellent weather resistance, and are sequentially coated and provided in a three-layer laminated structure, thereby providing a coating 10. ) Durability and weather resistance can be significantly improved.

As described above, the present invention is not limited to the specific preferred embodiments described above, and various modifications may be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. It is possible and such variations are within the scope of the present invention.

1 is a front view showing a device for triple coating of synthetic resin powder according to a preferred embodiment of the present invention.

Figure 2 is a front view showing a dipping coating operating state of the device for triple coating of synthetic resin powder according to a preferred embodiment of the present invention.

Figure 3 is a plan view showing the arrangement of the circulation means in the apparatus for triple coating of synthetic resin powder according to a preferred embodiment of the present invention.

Figure 4 is a front view showing a device for triple coating of synthetic resin powder according to another embodiment of the present invention.

5 is a perspective view showing a state before the workpiece is bound to the masking binding member of the apparatus for triple coating of synthetic resin powder according to a preferred embodiment of the present invention.

 6 is a perspective view showing a state in which the workpiece is bound to the masking binding member of the apparatus for triple coating of synthetic resin powder according to a preferred embodiment of the present invention.

7 is a perspective view showing a state in which the workpiece is separated from the masking binding member after the coating treatment of the apparatus for triple coating of synthetic resin powder according to an embodiment of the present invention.

Figure 8 is a schematic diagram showing the arrangement of the transfer unit and the coating unit for the triple coating method using the apparatus for triple coating of the synthetic resin powder according to a preferred embodiment of the present invention.

9 is a flow chart showing a triple coating method using a device for triple coating of a synthetic resin powder according to a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: device for triple coating of synthetic resin powder 110: transfer unit

120: masking binding member 121: rotating member

122: expansion member 123: semi-rotating member

124: locking member 126: insulating member

130: coating unit 140: intake portion

150, 450: circulation means 151, 451: circulation pipe

152, 452: pneumatic member 453: dust collecting tank

454: air outlet 454a: filter

454b: drain pan 10: workpiece

20: synthetic resin powder

Claims (5)

A transfer unit for selectively transferring the workpiece heated to a predetermined temperature; A coating unit disposed on an outer side of the transfer unit and having a flow tank in which air is uniformly supplied from a lower portion of the transfer unit so that the mixed air of synthetic resin powder is formed by completely containing the coated object; An intake part provided surrounding the upper end of the flow tank and forming a collection space to collect the mixed air discharged toward the edge of the flow tank; And And a pneumatic member communicating with the flow tank and the intake unit, and having a pneumatic member for injecting high pressure air to the flow tank side to circulate the mixed air collected in the intake unit to the inside of the flow tank. Apparatus for triple coating of synthetic resin powder. The method of claim 1, One side of the circulation means for the triple coating of the synthetic resin powder characterized in that the dust is separated by the air discharged by the air discharge unit by the air discharge unit to reduce the air pressure and the dust collecting tank is precipitated synthetic resin powder is further provided. Device. The method of claim 2, The circulation means is connected to the lower end of the flow tank from the lower surface of the intake, the apparatus for triple coating of the synthetic resin powder, characterized in that the plurality is arranged at equal intervals along the lower surface of the intake. The method of claim 1, The transfer unit is a device for triple coating of synthetic resin powder, characterized in that the masking binding member for binding and lifting the masking end of the workpiece. A masking connecting step of automatically masking the pretreated and heated workpiece to be rotated to the masking binding member so as to be connected to the transfer unit; An impact absorbing layer coating step of completely immersing the workpiece in the epoxy powder layer of the coating unit in which the epoxy powder is floated by the transfer unit connected in the masking connection step; An adhesive layer coating step of completely immersing the modified polyethylene powder layer by moving the coating material subjected to the impact absorbing layer coating step to the coating unit having the modified polyethylene powder floating therein; And The coating method using the three-layer coating device of the synthetic resin powder comprising the coating layer, the coating layer is moved to the coating unit with the polyethylene powder floating on the inside of the coating layer after the adhesive layer coating step.

Images