JPS59206075A - Powder painting device - Google Patents

Abstract

PURPOSE:To permit easy cleaning in the stage of changing the color of a powder paint and to improve the recovering efficiency of the paint by housing a paint supplying part in a paint recovering device and regulating the flow direction of the powder paint toward the same horizontal direction as the injecting direction of a gun. CONSTITUTION:A painting gun 31 is supplied with a paint P from an injector 252 of a paint recovering device 20 and is driven by a driving means to inject the paint P to a material 40 to be painted. When the paint P is thereupon sprayed from the gun 31 while the material 40 is transferred, the flow of the paint P is sucked by the suction force generated by a blower 16 into the device 20, and is regulated to laminar flow toward the horizontal direction by a perforated plate 23. The paint is filtered with a bag filter 24 through the plate 23 after enclosing the material 40 and therefore the paint is captured by the filter 24. The captured paint P' is blown down to a lower paint supplying part 25 from a reverse injecting nozzle 161 and is supplied again to a gun mechanism 30.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a powder coating device that applies a powder coating using electrostatic electricity.

This type of painting equipment includes a painting booth, a paint recovery device that collects excess powder paint in the coating chamber of the booth, and a paint supply device that is connected to the paint recovery device and supplies paint to a paint spray gun. is equipped with a paint spray gun that sprays powder paint onto the objects to be painted that have been brought into the booth, and also collects the paint that has not been applied to the objects with a recovery device to recycle the paint supply device. It is configured to supply

However, in conventional equipment of this kind, the booth, collection device, and supply device were each separate and independent, and each part was connected by a tact or hose, so when changing the color of paint, the duct that connects these parts is There was a disadvantage that cleaning the hoses and hoses was troublesome and required a lot of effort.

Furthermore, some conventional coating devices of this type have a configuration that generates a laminar flow from the top to the bottom of the coating chamber in order to suck and discharge excess paint powder in the coating chamber. , the laminar flow becomes perpendicular to the flow of paint injected from the paint spray can, so in order to maintain the flow of paint at a predetermined speed, it is necessary to increase the jetting force of the spray gun, and the paint Because it is absorbed downward by the force of laminar flow,
There is a disadvantage that the amount of surplus paint that falls to the bottom of the painting chamber increases, and therefore the collection device and supply device also become large.

The present invention aims to provide a powder coating apparatus that can eliminate the above-mentioned disadvantages.

The apparatus of the present invention will be explained below with reference to the accompanying drawings. FIG. 1 is a schematic vertical sectional side view showing the configuration of the apparatus of the present invention,
2 is a booth, 20 is a paint recovery device, and 30 is a paint spray can mechanism, each of which is constructed as follows.

The booth 10 has a coating chamber 10' inside, and a transport mechanism such as a trolley conveyor device 40 for conveying the object 40 from the paper surface to the spine of the paper is installed in the coating chamber, and the object to be coated is also provided with a transport mechanism such as a trolley conveyor device. The spray gun mechanism 30 and the paint recovery device 20 are disposed on the front and rear surfaces perpendicular to the moving direction of the object 40.

For this purpose, the injection gun mechanism 3 is installed in the front of the booth JO.
An opening 2 for receiving the spray gun 31 of the painting chamber 10' is formed at the rear of the booth, and an opening 13 is formed in the rear of the booth to connect the recovery device 20. Further, the bottom surface 14 of the painting chamber is formed as an inclined surface that descends from the opening 12 toward the opening 13.

An exhaust chamber 15 having an opening 151 at the rear is provided in the -F section of the painting chamber 10' of Booth 0, and a reverse injection means, for example, high-pressure compressed air, is jetted into this exhaust chamber 15. An exhaust means equipped with a reverse injection nozzle 161, in which a flow 16 is accommodated, and a filter 17 is provided on the exhaust port side of the exhaust chamber 5, whereby the exhaust gas is purified to be non-polluting. Ru.

The paint recovery device 20 is equipped with an exterior body 21 whose front side is tightly fitted to the rear side of the booth 10, and the front side of the exterior body 2 is provided with the opening 13 of the booth 10 and the exhaust gas. An opening 2 that communicates with the opening 151 of the chamber 15
2 is formed in the front opening 22 of the exterior body 21.
A perforated plate 23 is extended inside the opening 22 so as to close the opening 22, and a trapping filter such as a bag filter 24 for trapping the powder paint P is provided behind the perforated plate 23.

A paint supply unit 25 is disposed below the bag filter 24 to store the powder paint P and supply it to the injection gun mechanism 30.The paint supply unit 25 is connected to the opening of the booth 10. 13, and a feeding means (for example, an injector 252) for taking out the paint P from the storage tank 251 and feeding it to the injection gun mechanism 30. Tank 251
In this example, the lid opens directly below the back filter 24 and has a foreign matter separation function in this opening, and a plate 253 is provided for the vibrating sieve, and the bottom surface is a porous surface 254, and the pressure is removed from this porous surface 254. By introducing air into the storage tank 251, the paint P in the storage tank 251 is made to flow, and the flowing paint P is sent out from the injector 252.

The opening 13 of the booth and the opening 151 of the exhaust chamber 15
and a front opening 2 of the paint recovery device 20 that faces this.
A connecting mechanism 50 is provided between the booth 10 and the paint recovery device 20, and the connecting mechanism 50 includes a connecting device, for example, a one-touch type stopper 51, which connects the booth 10 and the paint recovery device 20 in a detachable manner.
A sealing member for sealing the connection between the booth 10 and the paint recovery device 20, for example, a backing 52 provided on the front side periphery of the exterior body 21, is provided, so that the paint recovery device 20 can be operated airtightly and easily. Booth] 0 is connected.

The injection gun mechanism 30 is made similarly to a conventional mechanism of this kind, and one or more injection guns 31 are mounted on a support frame 32.
The paint P is supplied from the injector 252 of the paint recovery device 20 and is injected onto the object to be painted 40 by a drive means (not shown).

Since the apparatus of the present invention is as described above, when the powder coating material P is sprayed onto the object 40 from the spray can 31 while the object 40 is being transferred, the flow of the powder coating material P is controlled by the suction force generated by the blow 16. The perforated plate 2 is sucked into the paint recovery device 20.
3, the flow is rectified into a horizontal laminar flow.

This laminar flow of powder paint P encloses the object 40 to be coated, passes through the perforated plate 23, and is filtered by the bag filter 24, so the paint P flows into the paint collection device 20 without being applied to the object 40. is captured by the bag filter 24.

Reverse injection nozzle 16 using high pressure compressed air as in the above embodiment
1, by injecting a reverse jet flow into the bag filter 24, the powder paint P' captured and collected in the bag filter 24 is discharged and blown down to the paint supply section 25 below. Something happened.

Powder paint P' blown off from the bag filter 24
The vibrating sieve is sieved by a plate 253 and collected in the storage tank 251, and the injector 25
2 to the spray gun mechanism 30, and is again sprayed from the spray gun 31 toward the object 40 to be coated.

Since the device of the present invention is as described above, the following effects can be expected by using it.

Since the paint collection device 20 includes the paint supply section 25,
The collecting part of the paint P can be separated from the booth lO and the injection gun mechanism 30, and therefore, when changing the paint color, it is only necessary to replace the paint recovery device 20, which makes the color change work extremely simple. .

When changing the paint color, it is only necessary to clean the bottom surface 14 of the painting chamber and the duct or hose that connects the injector 252 of the paint recovery device 20 and the injection gun mechanism 30.
It is simple and easy to clean and requires a lot of effort.

Since the powder paint P flows along with the laminar flow flowing in the horizontal direction, the flow of the powder paint sprayed from the injection gun 31 is of course not obstructed by the laminar flow, and the flow of the laminar flow is not limited to the laminar flow.
1, the discharge force of the injection gun 31 and the amount of compressed air required for injection can be made smaller compared to conventional methods, and experiments have shown that the discharge pressure and amount of compressed air can be reduced. We were able to reduce it by approximately 20-30%.

Since the powder paint P flows in a laminar flow in the horizontal direction, the amount of paint falling can be reduced, and therefore the adhesion resistance efficiency of the powder paint P to the object to be coated can be improved.

Since the device of the present invention can achieve such effects,
Although this type of equipment is extremely useful, the painting room 10'
If the powder paint P that descends to the bottom surface 14 of the paint is collected on the bottom surface, there are disadvantages in that not only does cleaning work become troublesome when changing colors, but also the paint recovery efficiency is degraded.

The second invention provides a powder coating apparatus capable of eliminating such disadvantages, and is provided with the following configuration.

The device according to the second invention includes a booth 10 as shown in FIG.
The paint recovery device 2
At the same time, the perforated plate 23 on the side of the paint recovery device 20 is configured such that its lower end 231 is above the lower edge 141 of the bottom surface of the painting chamber 4, The lower end portion 231 of the plate and the lower edge 14 of the bottom surface 14 of the painting chamber
1, the powder coating on the bottom surface 141 is supplied to the supply section 25.
An inflow r1u gap 26 is formed in such a way that it flows into the storage tank 251, and furthermore, a paint flow is formed in the booth 10 such that the powder paint P on the bottom surface 14 of the painting chamber flows toward the inflow gap 26. The configuration includes means, for example, an air curtain generating device 60 as shown in FIG. 2 or a vibrating device 70 as shown in FIG. 3.

The air curtain generator 60 includes a compressor 61
and a jet port 62 from which the compressed air obtained by the compressor 61 is jetted, and the jet port 62 is configured so as to form an air curtain a through which the compressed air jetted out flows along the bottom surface 14 of the painting chamber. This air curtain allows the powder coating P on the bottom surface 14 to be transferred to the storage tank 25 without impairing the laminar flow in the coating chamber 10'.
The amount of sieve No. 1 is allowed to flow onto the board 253.

On the other hand, the vibration device 70 vibrates the bottom surface 14 of the painting chamber by a minute amount in the vertical direction.
1 and a rotor 72 that rotates eccentrically with respect to the rotation axis of the motor 71, and is configured so that the rotor 72 generates vibrations on the bottom surface 14.

For example, a cam member may be used as the rotor 72, but in this embodiment, a rotating rod that performs bending motion is used.

Since the apparatus of the present invention is as described above, the powder paint P remaining on the bottom surface 14 of the coating chamber lO' can be flowed and removed to the storage tank 251, thereby improving the recovery efficiency of the powder paint P. At the same time, there is an effect that the bottom surface 14 of the coating chamber 10' can always be maintained in a clean state.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway exploded view showing the configuration of the device of the present invention;
3 are side views showing essential parts of the apparatus according to the second invention. In the figure, 10 is the booth percentage, 10' is the painting room, 12 is the front opening, 13 is the rear opening, 14 is the bottom percentage, 141 is the lower edge of the bottom, 15 is the exhaust chamber, 151 is the exhaust chamber opening, 16 is the exhaust means 20 is a paint recovery device, 22 is an opening, 23 is a perforated plate, 24 is a bag filter as a capture filter, 25 is a paint supply section, 251 is a storage tank,
252 is an injector as a feeding means, 26 is an inflow gap, 30 is a paint spray gun mechanism, and 31 is a spray gun 5Pe.
P' represents a powder coating, and a represents an air curtain. Patent applicant: Osame Kogyo Co., Ltd. Agent: Seiji Matsuda 531-

Claims (1)

[Scope of Claims] 1. An opening for receiving an injection gun is formed in the front of a booth that has a painting chamber formed inside, and an opening that fully opens the painting chamber is formed in the rear, and the booth has a painting chamber formed therein. An exhaust chamber having an opening at the rear is provided in the upper part of the booth, and an exhaust means is housed in this exhaust chamber, and a paint recovery device having an opening at the front so as to communicate with the exhaust chamber and the painting room is installed at the rear of the booth. The paint collection device is detachably connected to the paint collecting device, and a perforated plate is extended so as to close the opening of the paint collecting device, and a paint trapping filter is disposed behind the perforated plate, and a paint trapping filter is disposed below the trapping filter. is provided with a paint supply section, and the paint supply section is provided with a storage tank for collecting the paint brushed off from the trapping filter and a feeding means for feeding the paint in the storage tank to the paint injection can mechanism. , Powder coating characterized in that the air in the coating chamber of the booth is discharged by the exhaust means through the trapping filter, and the perforated plate generates a laminar flow flowing horizontally in the coating chamber. Device. 2. A patent characterized in that the connecting mechanism includes a one-touch connector that connects the booth and the paint recovery device, and a sealing member that seals the connection between the booth and the paint recovery device. A powder coating apparatus according to claim 1. 3. The powder coating apparatus according to claim 1, wherein the capture filter is a bag filter, and the exhaust means is provided with means for back-injecting air into the bag filter. 4. The powder coating apparatus according to claim 1, wherein the bottom surface of the coating chamber is formed as an inclined surface that becomes lower from the injection gun side toward the paint recovery device side. 5. An opening to receive the spray gun is formed on the front of the booth that has a painting room inside, and an opening that completely opens the painting room is formed on the rear, and an opening is opened to the rear in the upper part of the painting room. An exhaust chamber having a section is provided, and an exhaust means is housed in the exhaust chamber, and a paint recovery device having an opening at the front so as to communicate with the exhaust chamber and the painting room is detachably connected to the rear of the booth by a connecting mechanism. In the paint recovery device, a perforated plate is extended so as to close the opening thereof, and a paint trapping filter is arranged behind the perforated plate, and a paint supply section is provided below the trapping filter, The paint supply section is provided with a storage tank for collecting the paint brushed off from the trapping filter and a feeding means for feeding the paint in the storage tank to the paint spray gun mechanism, and is provided with a storage tank for collecting the paint brushed off from the capture filter, and a feeding means for feeding the paint in the storage tank to the paint spray gun mechanism. A powder coating apparatus characterized in that the air is discharged by the exhaust means through the trapping filter, and the perforated plate generates a laminar flow flowing horizontally in the coating chamber. The bottom surface is formed into an inclined surface that becomes lower from the front to the rear, and the lower end of the perforated plate of the paint recovery device is made higher than the lower edge of the bottom surface of the painting chamber, thereby making it possible to lower the bottom surface of the painting chamber. forming an inflow gap through which powder paint can flow into the reservoir of the paint supply section;
The powder coating apparatus is characterized in that the booth is provided with a paint flow means for causing the powder paint on the bottom of the coating chamber to flow toward the inflow gap. 6. The powder coating apparatus according to claim 4, wherein the paint flowing means is an air curtain generating device that causes the paint to flow along the bottom surface of the coating chamber. 7. The powder coating apparatus according to claim 4, wherein the paint flow means is a vibration generator that vibrates the bottom surface of the coating chamber.