JP2003275640A - Coating booth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating booth efficiently recovering a coating which does not deposit on an object to be coated in the recyclable state. <P>SOLUTION: A coating mist in an upper coating work part 2 is induced by an exhaust flow directed to a lower coating recovery part 3. A capturing member 3a lets a captured liquid coating captured by a collision of the coating mist induced to the exhaust flow flow down toward an intake port provided at a lower and inner side at an inclination of a predetermined angle. A capturing member 3b lets a captured liquid coating captured by a collision of the coating mist induced to the exhaust flow flow down toward a peripheral edge at a lower outer side at an inclination of a predetermined angle with the captured coating flowing down from a collision member 3a. A capturing member 3c lets the captured liquid coating captured by a collision of the coating mist induced to the exhaust flow flow down toward a recovery port 3f provided at a lower inner side with the captured coating flowing down from the collision member 3b to recover it. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint booth, and more particularly to a paint recovery type paint booth for recovering paint that has not adhered to an object to be coated in a reusable state.

[0002]

2. Description of the Related Art Conventionally, painting work in a factory is carried out in a painting booth in order to prevent the paint from scattering indoors and outdoors. In this coating booth, the paint mist that did not adhere to the object to be coated is placed on the exhaust flow forcedly created in the coating booth and sent to the filter or water, and the paint mist is separated from the exhaust flow to remove the filter or water. Collected in
Collected.

FIG. 6 shows a conventional coating booth (filter type).
FIG. 3 is an explanatory diagram schematically showing the structure of FIG. The coating booth 1 shown in the drawing guides the paint mist 9a in the coating work section 2 to the paint collecting section 3 by the exhaust flow 8 directed to the exhaust port 3e, and collides it with the filter 3g installed in the paint collecting section 3. To collect. The collected paint is discarded together with the filter 3g.

FIG. 7 is an explanatory view schematically showing the structure of a conventional coating booth (water washing type) and the manner in which the paint mist is collected. In the illustrated coating booth 1, the paint mist 9a in the coating work unit 2 is exhausted to the exhaust flow 8 toward the exhaust port 3e.
The liquid is guided to the paint collecting unit 3 and collided with the water 3h in the water tank installed in the paint collecting unit 3 to be collected. The collected paint is discarded together with 3 hours of water.

[0005]

However, the conventional coating booth described above has the following problems. That is, in the filter type, since the paint is collected in a state of being adsorbed by the filter, the collected paint is dried and deteriorated, and cannot be used like the original paint. Therefore, the used filter had to be disposed of, and the limited resources were wasted.

On the other hand, in the washing method, since the paint is collected in a state of being suspended in water, the collected paint is oxidized and deteriorated, and it cannot be used like the original paint. Therefore, the used water had to be disposed of, and the limited resources were to be wasted. Moreover, if used water is discarded as it is, it will lead to environmental pollution, and if the water is purified, the cost for it will be high. In addition, the structure of the paint recovery section tends to be complicated, which increases the manufacturing cost.

Further, since all of the above-mentioned coating booths are designed to be large, the capacity of the coating work section becomes large, and it is necessary to use an exhaust fan having a large exhaust capacity, so that the operating cost thereof is high. It was.

The present invention has been made to solve the above problems, and an object thereof is to provide a coating booth capable of efficiently recovering a coating material that has not adhered to an object to be coated in a reusable state. Especially.

Another object of the present invention is, in addition to the above objects,
The entire coating booth has a compact and simple structure to reduce manufacturing costs and operating costs.

[0010]

In order to achieve the above object, the present invention introduces a paint mist in an upper coating work section by an exhaust flow toward a lower paint collecting section and installs it in the paint collecting section. A coating booth that captures and recovers the paint mist by the first capturing member, the second capturing member, and the third capturing member, wherein the first capturing member is a coating booth in which the paint mist guided to the exhaust flow is collected. The capture paint that has been captured and turned into a liquid by colliding with the first capture member is caused to flow down toward an intake port provided on the lower inner side at an inclination of a predetermined angle, and the second capture member uses the exhaust gas flow. The paint mist guided to the second catching member collides with the second catching member and becomes liquid, and the catching paint is directed toward the lower outer peripheral edge together with the catching paint flowing down from the intake port of the first collision member. Inclination of a predetermined angle Caused to flow down, said third capture member is
The paint mist that is captured by the paint mist guided by the exhaust flow colliding with the third trapping member and is in a liquid state is provided inside the lower part together with the trapping paint that has flowed down from the peripheral edge of the second colliding member. The coating booth was characterized in that the trapping paint trapped by each trapping member was collected in the collection tank connected to the collection port by flowing down toward the collection port.

Further, in the above structure, the first collision member is a member that serves as the intake port by inclining the pair of flat plates inward downward at a predetermined angle and separating them by a predetermined width. The second collision member is a roof-shaped member whose surfaces are inclined downward toward the outside at a predetermined angle, and the third collision member includes a side surface having the exhaust port and the recovery port. And a member that is formed in an upper opening type box shape surrounded by a bottom surface that is inclined at a predetermined angle toward the recovery port and that is installed at a position that includes the second collision member. Preferably.

Further, in the above structure, a supporting means for supporting the coating means is provided above the coating work section, and the supporting means exposes the main body of the coating means to the outside of the coating work section. Moreover, it is preferable that the coating means is supported in a state where only the extension nozzle mounted on the main body of the coating means is inserted into the coating work section.

Further, in the above structure, it is preferable that at least the first collision member and the second collision member are made of stainless steel.

[0014]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a coating booth 1 according to the present invention, FIG. 2 is a front view, and FIG. 3 is a side view. As shown in the figure, the coating booth 1 is divided into an upper coating work section 2 and a lower coating material recovery section 3. The coating work unit 2 has a substantially rectangular parallelepiped shape with a side of about 0.7 to 1.0 m, and the paint collecting unit 3 has a side of about 0.4 to 0.7 m.
Is a substantially rectangular parallelepiped shape. The present invention has these shapes
The size is not limited.

The structure of the coating work unit 2 will be described below. As the coating means, the spray gun 4 having the extension nozzle 4b mounted on the main body 4a is used. Support tool 2a as means for supporting the spray gun 4
Is provided on the upper part of the coating work unit 2, and the spray gun 4 is exposed in a state where the spray gun body 4a is exposed to the outside of the coating work unit 2 and only the nozzle 4b is inserted into the coating work unit 2. I support you. By supporting in this way, the spray gun main body 4a can be prevented from being soiled, and malfunctions caused by the soiling can be prevented. Further, the volume of the coating work unit 2 can be designed smaller than that of the conventional one, and effects such as improvement of recovery efficiency and reduction of power consumption can be obtained.

An entrance / exit 2b of the object to be coated is provided at the center of the left and right side surfaces of the coating work section 2. That is, the coating booth 1 is installed by adjusting the position of the coating work unit 2 so that a transporting means (not shown) such as a roller conveyor penetrates the left and right doorways 2b. Further, a predetermined mask plate (not shown) for preventing the paint from being sprayed on the driving portion of the conveying means is provided at a predetermined position of the coating work unit 2. An inspection window 2c for inspecting the state of painting is provided at the center of the front and rear side surfaces of the painting work unit 2.

The exhaust port 3e provided in the paint recovery unit 3 has an exhaust duct 5 as shown in FIG. 3, and FIG.
An exhaust fan 7b is connected via a recovery box 7a as shown in (b). Here, the collection box 7a
Is provided with a plurality of layers of filters 3g, and it is possible to completely remove the trace amount of paint mist 9a mixed in the exhaust gas flow 8. By operating the exhaust fan 7b, as shown in FIG.
An exhaust flow 8 flowing from the coating work section 2 of the coating booth 1 toward the coating recovery section 3 as shown in (a) can be generated. Here, the power of the exhaust fan 7b can be controlled by an inverter, the flow rate of the exhaust flow 8 can be adjusted to adjust the recovery efficiency, and various paints having different sizes and specific gravities of the paint mist 9a can be dealt with. . The air volume at the exhaust port 3e is about 39 m ³ / min, and the wind speed is about 3.2 m.
It is preferable to adjust the power of the exhaust fan 7b so that it becomes / sec.

The structure of the paint collecting section 3 will be described below. The paint collecting unit 3 includes three types of capturing members 3a and 3a.
b and 3c are the basic constituent elements. That is, the trapping member 3a is a member that serves as the intake port 3d by inclining the pair of flat plates downward inward at a predetermined angle (about 10 to 20 °) and separating them by a predetermined width (about 20 cm). is there. The capturing member 3b is a member formed in a roof shape in which two surfaces are inclined outward and downward at a predetermined angle (about 25 to 35 °). The capturing member 3c is installed at a position that includes the collision member 3b, has a side surface having an exhaust port 3e and a recovery port 3f, and is at a predetermined angle (about 5 to 15 °) toward the recovery port 3f. It is formed in a box shape of an upper opening type surrounded by an inclined bottom surface.

Here, all the trapping members 3a to 3c are made of stainless steel. As a result, the recovered paint can be less changed than the original paint properties and can be recovered and reused. In addition, 3 of the capturing members
It is preferable that a and 3b are made of stainless steel, but the catching member 3c may be made of a material that can be easily processed. On the contrary, the entire coating booth 1 may be made of stainless steel.

The trapping and collection of the paint mist by the trapping members 3a to 3c is performed as follows. First, FIG. 5 (b)
As shown in FIG. 5, the paint mist 9a oversprayed in the coating work unit 2 is guided toward the trapping member 3a by the exhaust flow. Of the guided paint mist 9a, the paint mist 9a that collides with the capturing member 3a is the capturing member 9a.
Is trapped on the upper surface of the and becomes liquid. This liquid capture paint 3
The b flows out toward the intake port 3d on the lower inside, flows down the trapping members 3a to 3c to reach the recovery port, and is finally recovered in the recovery tank 6. On the other hand, the paint mist 9a not captured by the capturing member 3a rides on the exhaust flow 8 and passes through the intake port 3d as it is.

Next, as shown in FIG. 5 (c), among the paint mists 9a not captured by the capturing member 3a, the coating mist 9a that collides with the capturing member 3b is captured by the upper surface of the capturing member 3b. It becomes liquid. This liquid capture paint 9b
Flows out toward the outer periphery of the lower side, and the capturing member 3b,
3c flows down to reach the recovery port 3f, and finally the recovery tank 6
Will be collected. On the other hand, the paint mist 9a that has not been captured by the capturing member 3b rides on the exhaust flow 8 and is guided as it is toward the capturing member 3c.

Next, as shown in FIG. 5 (d), the paint mist 9a that has not been captured by the capturing member 3b is retained by the capturing member 3b.
It collides with the side surface or the bottom surface of c and is captured and becomes liquid. The liquid capture paint 9b flows out toward the recovery port 3f on the lower inside, flows down from the recovery port 3f, and is recovered in the recovery tank 6.

In this way, by performing the collision separation a plurality of times by each of the trapping members 3a to 3c, the exhaust flow 8 and the paint mist 9a can be efficiently separated, and the paint mist 9a guided to the exhaust flow 8 is obtained. Most of it is recovered. Also,
As described above, by installing each of the trapping members 3a to 3c with a predetermined angle of inclination, it is possible to change the flow direction of the exhaust flow 8 while suppressing the occurrence of turbulent flow in the exhaust flow 8 as much as possible. The separation effect can be enhanced.

Further, shortly after the operation of the coating booth 1 is started, the paint mist 9a is applied to the collision members 3a to 3c.
Are captured and become wet. Thereby, the bounce of the paint mist 9a is suppressed, and the collecting effect is further enhanced.

The coating booth 1 is designed so that both the coating work section 2 and the paint collecting section 3 have a small volume as described above. As a result, the paint mist 9a is captured and
It is possible to prevent the drying at the time of collection and effectively collect the paint, and the collection efficiency is improved. Also, paint booth 1
Since the total exhaust amount can be reduced, the exhaust fan 7b having a small exhaust capacity can be used, and the electric energy can be reduced.

The coating booth 1 is wet and collects the paint without drying it, which is advantageous for recovering and reusing an aqueous paint having a low volatility. Since this water-based paint has a low environmental impact, it is expected that demand will increase in the future.
It is effective and economical from now on into the future. It goes without saying that it can also be used for solution type paints.

In the present embodiment, the fixed type spray gun is used as the coating means, but the present invention is not limited to this. For example, a mobile type coating device such as a robot or a reciprocating means is used as the coating means. Can also be used.

[0028]

As described above, according to the coating booth of the present invention, the coating material that has not adhered to the object to be coated can be reused without being deteriorated by being dried or causing a chemical reaction. And, it can be collected efficiently. Therefore, it is not necessary to dispose of the collected paint as in the conventional case.

Further, since the coating booth of the present invention is compact and has a simple structure as a whole, the manufacturing cost can be reduced, and the exhaust fan can be downsized to reduce its power consumption. it can.

[Brief description of drawings]

FIG. 1 is a schematic external perspective view of a coating booth according to an embodiment of the present invention.

2 is a schematic front view of the coating booth of FIG. 1. FIG.

FIG. 3 is a schematic side view of the coating booth of FIG.

4A and 4B are diagrams schematically showing a collection box and an exhaust fan connected to the coating booth of FIG. 1, where FIG. 4A is a top view and FIG. 4B is a side view.

5 is a diagram schematically showing how paint is collected in the coating booth shown in FIG. 1, in which (a) shows an exhaust flow, and (b) to (d) show how paint mist or trapping paint flows, respectively. It is the explanatory view shown.

FIG. 6 is a schematic explanatory view of a conventional coating booth (filter type).

FIG. 7 is a schematic explanatory view of a conventional coating booth (water washing type).

[Explanation of symbols]

1 painting booth 2 Painting work department 2a support 2b doorway 2c inspection window 3 Paint Collection Department 3a, 3b, 3c capturing member 3d air intake 3e exhaust port 3f collection port 3g filter 3h water (conventional) 4 spray guns 4a spray gun body 4b extension nozzle 5 exhaust duct 6 collection tanks 7a Collection box 7b exhaust fan 8 exhaust flow 9a paint mist 9b Capture paint (liquid)

Claims (4)

[Claims] 1. A first trapping member, a second trapping member, and a third trapping member installed in the paint collecting unit, wherein a paint mist in an upper coating work unit is guided by an exhaust flow toward a paint collecting unit below. A coating booth that captures and recovers the paint mist by a member, wherein the first capture member is captured and becomes liquid by collision of the paint mist guided by the exhaust flow with the first capture member. The trapped paint is flowed down toward the intake port provided on the lower inside at a predetermined angle, and the second trapping member is such that the paint mist guided by the exhaust flow collides with the second trapping member. The capture paint that has been captured and turned into a liquid state, together with the capture paint that has flowed down from the intake port of the first collision member, flows down at an inclination of a predetermined angle toward the outer periphery of the lower side, and the third capture member, Guided to the exhaust flow The captured paint mist that has been captured by the collision of the paint mist that has collided with the third trapping member into a liquid state, together with the trapping paint that has flowed down from the peripheral edge of the second collision member, is collected in the recovery port provided on the lower inside. A coating booth, characterized in that the trapping paint trapped by each trapping member is collected in a collection tank connected to the collection port by flowing it down toward the collection tank. 2. The first collision member is a member which serves as the intake port by inclining a pair of flat plates downward inward at a predetermined angle and separated from each other by a predetermined width, and the second collision member. Is a roof-shaped member in which each surface is inclined downward at a predetermined angle, and the third collision member includes a side surface having the exhaust port and the recovery port. A member that is formed in an upper opening type box shape surrounded by a bottom surface that is inclined at a predetermined angle toward, and that is installed at a position that includes the second collision member. The coating booth according to Item 1. 3. A support means for supporting the coating means above the coating work section, the supporting means exposing the main body of the coating means to the outside of the coating work section, and the coating means. 2. The coating means is supported in a state where only the extension nozzle mounted on the main body of the vehicle is inserted into the coating work section.
Or the coating booth described in 2. 4. The coating booth according to claim 1, wherein at least the first collision member and the second collision member are made of stainless steel.