JPH0822407B2 - Spray paint recovery device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a spray paint recovery device, and more particularly to a spray paint recovery device for recovering a paint sprayed with a solution in the air.

[Conventional technology]

Generally, in a spray coating apparatus using a spray gun, a spell gun for spraying paint on an object to be coated is arranged on one side and a coating booth is provided on the other side. The spray paint sprayed on the object to be coated forms a coating film on the object to be coated, part of it adheres to the inside of the coating booth, and the rest is diffused outside through the coating booth. It is the current situation.

[Problems to be solved by the invention]

In the above-mentioned conventional example, since the spray paint is diffused to the outside as it is through the exhaust means, there is an inconvenience that if it is left as it is, it will cause pollution. In addition, the amount of paint that adheres to the coating booth is usually the same as or greater than the amount of paint that adheres to the object to be coated, and this requires the total consumption of paint. There was an inconvenience that there were more than the above. Further, conventionally known spray paint recovery systems are often relatively large in size, and there is a disadvantage that it requires a lot of places and costs to install the facility.

[Object of the Invention]

The present invention provides a spray paint collecting apparatus that improves the disadvantages of the conventional example, particularly reduces the emission of the spray paint to the outside, enables the spray paint to be collected and reused, and at the same time enables downsizing. Is the purpose.

[Means for solving problems]

In the present invention, a plurality of paint collecting air filters each having an air filter member attached to the rotary frame, and rotatably supporting each paint collecting air filter and accommodating a lower portion thereof to form a paint solution. It is equipped with a solution bath that is constantly immersed.

Then, the paint collecting air filters are installed in the solution tank so that their filter surfaces are partially overlapped with each other, and the upper part of each paint collecting air filter is placed between the object to be coated and the exhaust means. It is arranged to be installed. This aims to achieve the above-mentioned object.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

First, in FIGS. 1 and 2, reference numeral 1 represents an object to be coated, reference numeral 2 represents a coating spray gun, and reference numeral 2A.
Indicates an electromagnetic valve.

The article to be coated 2 is hung on the hanger 3A and is conveyed by the conveying means 3.
It is designed to be transported in the direction orthogonal to the paper surface of FIG.

Reference numeral 4 represents an exhaust means provided on the opposite side of the spray gun for painting. The exhaust means 4 corresponds to the coating booth in the conventional example described above. Reference numeral 4A indicates an opening on the intake side of the exhaust means 4. Then, the spray paint recovery device 10 is provided between the opening 4A and the carry-in / transfer path of the article to be coated 1.
Are arranged.

In this embodiment, the spray paint collecting apparatus 10 is equipped with three paint collecting air filters 11 as shown in FIG. 4, but for convenience of explanation, first, a case of one paint filter (FIG. 2) will be explained. To do.

1 and 2, the spray paint collecting device 10 is formed so as to be movable and installed, and as a whole, is a circle formed by equipping the entire surface of the circular rotary frame 12 with a planar air filter. A plate-shaped paint collecting air filter 11, supporting shaft portions 13A and 13B for rotatably supporting the paint collecting air filter 11 at its central axis portion, and a drive means for rotating the paint collecting air filter 11 14 (see FIG. 1),
And a solution tank 18 in which a lower portion of the paint collecting air filter 11 is housed together with the circular rotary frame 12 and a solution for continuously dissolving and collecting the paint adhering to the paint collecting air filter 11 is arranged. Is configured.

In the present embodiment, the air filter of the paint collecting air filter 11 is a mesh-like continuous surface body that is flexibly assembled and processed, and is formed of a metal member having relatively fine meshes. For this reason, it has a structure in which the spray paint is easily attached. The circular rotary frame 12 of the paint collecting air filter 11 is made of a metal member and is grounded.

Driving means 14 for driving the paint collecting air filter 11
Is a motor 14A, a reduction gear 14B, and a connecting belt means 14C.
It is composed of

The solution tank 18 further includes a solution circulation mechanism 19 shown in FIG. 4, a paint removing wire brush 30 (see FIG. 2), and a concentration detecting means.
31 (see Fig. 3) are installed side by side. Reference numeral 19A,
19B shows the piping for the solution circulation mechanism 19 respectively, and the reference numerals 20, 21
Indicates an on-off valve.

The solution circulating mechanism 19 prevents the paint from settling by circulating the paint solution in the solution tank 14 in the direction of the arrow A as shown in FIG. 3, and in addition to the pipes 19B and 19A, the foreign matter filtering means 22 And a liquid pump 23 and a solution replenishing unit 24. A drive motor 23A is attached to the liquid pump 23.

A solution collecting means 25 is provided between the foreign matter filtering means 22 and the liquid pump 23. This solution removal 25
It is composed of a manually operable explosion-proof electromagnetic valve 25A, a solution extraction pipe 25B, and a solution extraction tank 25C.

Therefore, the solution can be arbitrarily taken out by manually operating the electromagnetic valve 25A.
When the concentration detecting means 31 to be described later detects a predetermined concentration level, the valve control portion 31A is energized to immediately open the valve.

The concentration detecting means 31 is configured to detect the viscosity of the solution by using the viscosity continuous measuring means 34 as shown in FIG. 3, and thereby to detect the concentration of the paint. An alarm unit 35 is provided which is activated immediately by detecting the preset concentration by the continuous viscosity measuring means 34 and turning the switch "on". As shown in FIG. 3, the alarm unit 35 is composed of a switching transistor 35A, a buzzer 35B operated by conduction of the switching transistor 35A, and a blinking lamp 35C. Where R ₁ and R
₂ indicates a resistance for level adjustment.

On one surface of the circular rotary frame 12 and the solution tank 18, mask means 40 for preventing the inflow of air is provided on almost the entire surface except for the air passage extending from the spray gun 2 to the opening 4A of the exhaust means 4. ing. The mask means 40 is made of, for example, a soft synthetic resin such as transparent vinyl having strong chemical resistance. Reference numeral 40A indicates an opening provided to face the spray gun 2.

By the operation of the exhaust fan 4B provided in the exhaust means 4, the sprayed paint moves as shown by the arrow B in FIG. Be released to the outside.

The upper end surface of the solution tank 18 in FIG. 1 is equipped with a lid 28, which effectively suppresses vaporization of the solution.
The lid 28 is formed with a through hole 28A for allowing the above-mentioned paint collecting air filter 11 to pass therethrough, and a wire brush or the like is provided at the paint collecting air filter 11 sending side portion of the through hole 28A. The formed solution removing means 28C is attached.

In addition, the solution tank 18 is equipped with an ultrasonic cleaning device (not shown), by which the adhesion of the paint is washed off. Reference numeral 32 indicates an explosion-proof ultrasonic oscillator.

Next, the operation of collecting the spray paint in the first embodiment will be described.

First, when the entire apparatus is operated and the coating work of the article to be coated 1 is started, the solution (for example, thinner) in the solution tank 18 becomes
By the action of the solution circulation mechanism 19 described above, the solution slowly moves from the left side to the right side in FIG. At the same time, the rotation of the circular rotary frame 12 and the air filter 11 for collecting the paint accompanying the rotation
The transfer of the solution causes the solution to be effectively and continuously stirred without waiting for the dissolved paint to settle.

On the other hand, since the sprayed paint is sucked and moved in the direction B in FIG. 1 as the exhaust means 4 operates as described above, almost the entire amount of the sprayed paint passes through the paint collecting air filter 11. For this reason, the spray paint is effectively attached to the paint collecting air filter 11, whereby the emission to the outside is significantly reduced.

The paint adhering to the paint collecting air filter 11 is efficiently dissolved from both sides by the solution in the solution tank 18. Therefore, the paint collecting air filter 11 continuously collects the spray paint at the air filter portion where the paint hardly adheres.

When the viscosity of the solution increases and the viscosity of the solution reaches a predetermined predetermined level, the viscosity continuous measuring means 34 shown in FIG. The solution is taken out from the solution take-out means 25. During this time, the operation of the liquid pump 23 is stopped. When the work of taking out the solution is completed, a new coating solution is replenished from the solution replenishing section 24 by an operator or the like.

On the other hand, since the taken out solution is in a state in which a certain amount of paint is dissolved, it can be reused as it is as a paint liquid of spray paint by adding a small amount of paint thereto.

For this reason, it is possible to drastically reduce paint consumption as a whole, to reduce the emission of spray paint to the outside, and to eliminate the inconvenience of incinerating paint adhered in the paint booth, which has been done conventionally. Has the advantage that

Further, in this embodiment, the circular rotary frame body 12 is formed of a metallic member and is grounded, and therefore, the paint collecting air filter 11 is always installed.
On the other hand, the sprayed paint released into the air is charged with floating charges floating in the air, and thus has a slight charge. Therefore, the spray paint is efficiently attached to the paint collecting air filter 11. In experiments, it is possible to obtain an increase in adhesion of about 4.5% (weight increase) on average without grounding. For this reason, when this is used for electrostatic coating, it is possible to sufficiently adhere and collect the coating which is more than twice as large as the conventional coating, and it is possible to remarkably reduce the coating components diffused to the outside.

Further, in this embodiment, since each paint collecting air filter 11 is rotatably supported at one place, the maintenance and inspection of the equipment is facilitated, and the width of the solution tank 18 can be set to be extremely small. There is an advantage that the amount of times used can be relatively small. Further, the solution tank 18 is used for about 1/2 of one revolution of the paint collecting air filter 11.
Since it is immersed in the liquid, it is possible to take a long time to collect the adhered paint in the solution. Also, the part that has come out of the solution tank 18 part will be immediately located in the passage of the spray paint,
For this reason, in most cases, the spray paint is applied in a state in which the solution is slightly adhered, and therefore, there is an advantage that solidification of the adhered paint is completely eliminated and recovery of the adhered paint in the solution is further facilitated.

Here, a case where three paint collecting air filters 11 are provided will be described with reference to FIG. The one shown in FIG. 3 is an air filter 11 for collecting paint of the same size.
Is used, and its central axis portion is arranged at a position where the paint collecting air filters 11 overlap each other by about 2/5. Others are the same as in the case of FIG. 12 described above.

In this case, the spray paint can be collected over a wide range, and even if there are a plurality of painting work areas, it can be sufficiently dealt with, and in particular, the height can be reduced. There is an advantage that the size can be reduced and the horizontal intake port for the spray paint can be set to be large, so that the line speed can be increased.

In each of the above-mentioned embodiments, the paint collecting air filter 11 is particularly made of a conductive member, but the paint collecting air filter 11 may not necessarily be a conductive member and may not be bendable. Further, as a method for measuring the solubility of the coating material in the solution in the solution tank 18, particularly, the continuous viscosity measuring means 34
However, the present invention is not necessarily limited to this. For example, it is possible to measure the concentration of the solution by using the change of the light transmission amount, and to output the change as a predetermined signal change at all times. You may comprise. As for the driving means 14, the paint collecting air filter 11 is replaced with a circular rotary frame body.
Even if it is equipped on all 12 surfaces, it may be unnecessary, especially for small amount of intermittent paint work. Further, the drive means 14 may be configured to drive the outer peripheral portion of the circular rotary frame body 12.

Further, in the above embodiment, the case where three paint collecting air filters 11 are provided and other cases are illustrated, but the number may be two or four or more. Further, in the above embodiment,
Although the case where the spray gun 2 is fixed has been exemplified, the present invention is not necessarily limited to this. For example, a vertical movement of the spray gun performed at the time of electrostatic coating or a portable coating by manual operation of the spray gun is also possible. Even if it is a thing, it is applied as it is.

〔The invention's effect〕

Since the present invention is configured and functions as described above, according to this, it is possible to continuously and effectively recover and use the spray paint that has not contributed to the coating film formation on the object to be coated. Not only can the amount of spray paint sprayed in the system be greatly reduced, but the overall consumption of the paint can be significantly reduced, and the air filter for collecting the paint is shaped like a circle, so the solution tank can be made much smaller. Moreover, since a plurality of paint collecting air filters are used, it is possible to deal effectively with a wide range of coating work areas dispersed in a plurality of areas. Since it is configured and functions in a wide range of coating work areas, the equipment is simple and the amount of solution used in the solution tank can be reduced once. It is possible to provide a mist coating recovery device.

[Brief description of drawings]

1 is a longitudinal sectional view showing a first embodiment of the present invention, FIG. 2 is a partially sectional front view showing a spray paint collecting device portion of FIG. 1, and FIG. 3 is an embodiment of FIG. FIG. 4 is a configuration diagram showing an example of a solution circulation mechanism and a concentration detecting means provided, and FIG. 4 is a front view showing a spray paint collecting device portion in the second embodiment. DESCRIPTION OF SYMBOLS 1 ... Object to be coated, 4 ... Exhaust means, 11 ... Air filter for collecting paint, 12 ... Circular rotary frame, 14 ... Driving means, 18 ... Solution layer.

Claims (1)

[Claims] 1. A paint solution in which a plurality of paint collecting air filters each having an air filter member mounted on a rotary frame and rotatably supporting each paint collecting air filter and accommodating a lower portion thereof. And a solution tank that is constantly immersed in the solution tank, and each of the paint collecting air filters is equipped in the solution tank so that their filter surfaces partially overlap each other, and the upper part of each paint collecting air filter. A spray paint recovery device, wherein the spray paint is disposed between the object to be coated and the exhaust means.