JPH091011A - Removing device for paint tailings in spray booth - Google Patents

Abstract

PURPOSE: To automatically collect paint tailings mixed together with bubbles and to remove them. CONSTITUTION: A belt 22 made of felt for a bubble adsorption mechanism 20 has a property adsorbing bubbles containing paint tailings. A part of the belt 22 is submerged in water 14 of a booth tank 12 and the remainder is positioned in the outside of water 14 in the booth tank 12. The belt 22 is driven by a driving mechanism, so that the belt 22 is circulated between the inside of water 16 in the booth tank 12 and the outside thereof. A squeeze chute 30 is provided in the upper end part of the belt 22 to scrape bubbles adsorbed on the belt 22 together with water. The squeeze chute 30 is brought into contact with the belt 22 at an acute angle for the proceeding direction of the belt 22. Bubbles and water scraped from the belt 22 by the squeeze chute 30 are received in a separator 32 of bubbles and water. Bubbles and water scraped by the squeeze chute 30 are collected in a vessel 34. Water 66 automatically returns to the booth tank 12 through a second vessel 36 and a tube 60 from an opening part 38 in the lower end. Bubbles 68 are automatically discharged to a bubble collecting tank 42 through a bubble collecting hose 44 from the vessel 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recovering paint dregs in a water-washing type coating booth and removing them from the coating booth.

[0002]

2. Description of the Related Art Automotive parts, for example, a work such as an engine cylinder block, is coated from the viewpoint of rust prevention and aesthetics. In a coating booth for coating such a work, for example, as shown in FIG. 1, a paint gun 6 sprays paint onto the work 4 in the coating booth 2. In order to prevent the paint dregs 8 that did not adhere to the work 4 from adhering to the wall surface of the coating booth 2, the wash water 10 is flown from the top to the bottom of the wall surface of the coating booth 2, and the wash water 10 is coated. It is adapted to be stored in a booth tank 12 provided at the bottom of the booth 2.

The paint dregs 8 are dissolved or dispersed in the wash water 10 and collected in the booth tank 12, but bubbles 16 are generated by the water flow of the wash dregs 10 and the paint dregs become foam-like and the water level of the stored water 14 is increased. Accumulates in. As the painting work is continued, the amount of paint residue increases, and the bubbles 16 in the booth tank 12 increase. The booth tank 12 is connected to the outside from the lower part of the coating booth 2, and a recovery port for recovering the bubbles 16 is provided outside. The bubbles 16 are regularly collected and removed from the collection port.

In the case where the paint dregs are precipitated, the dregs of the paint dregs can be separated from the washing water by collecting the precipitate in one place (see Japanese Patent Laid-Open No. 277405/1994). However, such a method cannot be applied if the paint meal does not settle. An apparatus has been proposed for filtering paint dregs by using a filter in order to remove paint dregs dispersed in washing water or foamed (Saikai Sho 62-3).
5667). In a device for filtering paint dregs using a filter, the filter is clogged, and the filter must be replaced regularly, which is troublesome and expensive.

[0005]

When bubbles are generated in the paint dregs removing device by the coating booth 2 and the booth tank 12 provided in the lower part thereof, a device for automatically and effectively collecting the bubbles and the paint dregs is provided. Therefore, there is a trouble that the manual recovery work must be performed regularly. Therefore, an object of the present invention is to make it possible to automatically collect and remove paint dregs together with bubbles.

[0006]

A paint dregs removing apparatus of the present invention is a booth tank for storing water that collects paint dregs in a coating booth, a part of which is submerged in the water of the booth tank, and the rest is a booth. Is located so that it is located outside the water in the tank,
A felt belt for adsorbing bubbles containing paint dregs, and a bubble adsorption mechanism having a drive mechanism for driving the felt belt to circulate between inside and outside of the water in the booth tank, and the water in the booth tank. A squeezing chute that is provided outside the felt belt to scrape the bubbles adsorbed on the felt belt together with water, and a mixture of the foam and water scraped by the squeezing chute and receives the water separated from the bubbles. To a booth tank, and a foam water separator for discharging foam is provided.

[0007]

[Function] Paint dregs are collected in a booth tank with water,
It becomes a bubble and floats on the water surface. By circulating the felt belt of the foam adsorbing mechanism, the foam containing the paint residue is adsorbed to the felt belt, scraped off by the squeezing chute outside the water in the booth tank, and collected in the foam water separator. In the bubble-water separator, bubbles are floated on the water surface to separate bubbles from water. The water separated from the foam is returned to the booth tank and the paint dregs are discharged with the foam and removed.

[0008]

FIG. 2 shows an embodiment. (A) is an overall schematic sectional view, (B) is a side view showing a bubble adsorption mechanism, and (C) is an enlarged sectional view showing a portion of a bubble water separator. Rinsing water 10 is made to flow from the top to the bottom of the coating booth 2, and the rinsing water 10 is stored in a booth tank 12 provided at the bottom of the coating booth 2. In the coating booth 2, the paint gun 6 sprayed the paint on the work 4, and the sample lees 8 which did not adhere to the work 4 were washed with the washing water 10 and the booth tank 12
Is stored. The paint used is not limited, but is, for example, a water-soluble normally dry paint based on an epoxy-modified acrylic resin.

The bubble adsorption mechanism 20 includes a drive roller 24 arranged above the water surface of the water 14 in the booth tank 12, a motor 28 for driving the rotation of the drive roller 24, and the water 1
A drive mechanism including a guide roller 26 provided in
A felt belt 22 is provided between a drive roller 24 and a guide roller 26. The belt 22 has a property of adsorbing bubbles containing paint dregs, part of which is submerged in the water 14 of the booth tank 12, and the rest is located outside the water 14 of the booth tank 12, and the drive mechanism drives the booth tank 12
It is driven so as to circulate between the inside and the outside of the water 14.

In order to scrape bubbles adsorbed on the belt 22 together with water, a diaphragm chute 30 is provided at an upper end portion of the belt 22 so as to come into contact with the traveling direction of the belt 22 at an acute angle. A specific example of the device including the bubble adsorption mechanism 20 and the throttle chute 30 is called an oil skimmer (a product name of Nagoya General Industry Co., Ltd.), which is manufactured for collecting floating oil in a cleaning tank or the like. The device can be used.

The foam water separator 32 that receives the foam and the water scraped from the belt 22 by the squeezing chute 30 is shown in FIG.
There is a first container 34 for receiving a mixture of foam and water, which container has an opening at its lower end,
An inlet of the foam recovery hose 44 is provided near the upper part. The opening at the lower end of the container 34 is connected to the adjacent second container 36, and the container 36 is provided with the inlet opening of the tube 40 at a predetermined height lower than the height of the inlet opening of the foam recovery hose 44. The tube 40 is a tube that is guided to the booth tank 12 to collect water. The foam recovery hose 44 is guided to the foam recovery tank 42. The foam collection tank 42 has a drain cock 43 for discharging the water separated from the foam.
Is provided. Reference numeral 31 is an upper lid of the booth tank 12.

In the foam / water separator 32, the foam and water scraped off by the squeezing chute 30 collect in the first container 34, and the water 4
The bubbles 48 float on the water surface of 6 to separate the bubbles from the water. The water 46 flows into the second container 36 through the lower end opening of the first container 34. When the liquid level of the water 46 in the container 36 reaches the position of the opening of the tube 40, the water 46 automatically returns to the booth tank 12. On the other hand, the foam 48 floats above the water surface in the first container 34, enters the foam recovery hose 44, and is automatically discharged to the foam recovery tank 42. When the bubbles collected in the bubble recovery tank 42 are left for a certain period of time, water is further separated from the bubbles and collected, so that by opening the drain cock 43, the booth tank 12 is again opened.
Can be returned to

[0013]

According to the present invention, the paint dregs collected in the booth tank become bubbles and float on the surface of the water, are adsorbed by the felt belt of the foam adsorbing mechanism and are carried to the outside of the booth tank, and are scraped by the squeezing chute. By doing so, it becomes possible to automatically perform the work of collecting bubbles and paint dregs by hand in the past.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a conventional paint residue removing device.

2A and 2B are views showing an embodiment, FIG. 2A is a schematic sectional view of the whole, FIG. 2B is a side view showing a bubble adsorption mechanism, and FIG. 2C is an enlarged view of a bubble water separator. FIG.

[Explanation of symbols]

 2 Painting booth 4 Work 6 Paint gun 8 Paint lees 10 Rinsing water 12 Booth tank 14,46 Water 16,48 Foam 20 Foam foam adsorption mechanism 22 Felt belt 32 Foam water separator 30 Squeezing chute

Claims (1)

[Claims] 1. A booth tank for storing water that has collected paint dregs in a coating booth, a part of which is submerged in the water of the booth tank, and the rest is located outside the water of the booth tank, A felt belt for adsorbing bubbles containing paint dregs, and a foam adsorption mechanism having a drive mechanism for driving the felt belt to circulate between the inside and outside of the water in the booth tank, and the water in the booth tank. A squeezing chute that is provided outside the felt belt to scrape the bubbles adsorbed on the felt belt together with water, and a mixture of the foam and water scraped by the squeezing chute and is separated from the bubbles. A paint dregs removing device for a coating booth, comprising a foam water separator for returning water to the booth tank and discharging foam.