JPH07108208A - Pretreatment equipment for painting - Google Patents

Abstract

PURPOSE:To surely remove iron powder, etc., from a bag-like structure part of an article to be coated. CONSTITUTION:A multiarticulated robot 12 to clean a bag-like structure part is installed before a series of a warm water tank 20, a degreasing tank 30, and a water washing shower 40 installed as coating pretreatment apparatuses and iron powder, etc., remaining in the bag-like structure part of an article W to be coated is removed by a degreasing liquid sprayed out of a nozzle 11 and at the same time, rough iron powder in the discharged degreasing liquid is collected by a strainer 14 and further fine iron powder is removed by an electromagnet 15 for iron powder removal to reproduce the degreasing liquid and then the degreasing liquid is returned to a multiarticulated robot 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating pretreatment device for removing iron powder and the like adhering to a bag structure portion of an object to be coated.

[0002]

2. Description of the Related Art In general, in order to apply a coating treatment to an object to be coated such as a white body of an automobile which has been sent through a required welding treatment, iron powder etc. adhered to the vehicle body by immersing the vehicle body in warm water. Is removed, and then a pre-painting treatment is performed such as immersing in a degreasing liquid to remove the press oil, rust preventive oil, etc. adhering to the surface.

However, the iron powder adhered together with the oil when the vehicle body is assembled by welding cannot be easily removed even if it is simply immersed in hot water because the difference in specific gravity between the iron powder and the water is too large. Although the press oil and rust preventive oil adhering to the surface can be removed by immersing them in the degreasing liquid, even the oil and iron powder that have entered the bag structure part cannot be removed. Defects in electrodeposition coating due to these iron powders, etc., as iron powders floating from the inner surface of the bag structure due to the treatment are gradually peeled off and mixed into the solution when immersed in the electrodeposition coating liquid. There is a problem that occurs.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to:
In particular, it is to provide a new coating pretreatment device capable of reliably removing iron powder and the like adhering to the bag structure portion.

[0005]

That is, the present invention is, as a coating pretreatment apparatus for attaining such a subject, a cleaning means for discharging a degreasing liquid to clean a bag structure portion of an object to be coated, and a cleaning means. A means for removing iron from the subsequent degreasing liquid and returning the regenerated degreasing liquid to the cleaning means, a series of hot water tanks provided as coating pretreatment means and the upper side of the degreasing tank. Is.

[0006]

Embodiments Now, the embodiments shown in the drawings will be described. The iron powder removing apparatus indicated by reference numeral 10 in the drawing is arranged in front of a series of hot water tank 20, degreasing tank 30, and washing shower 40 arranged as a pretreatment means for coating.

The iron powder removing apparatus 10 includes an articulated robot 12 for cleaning a bag structure portion of a vehicle body W as an object to be coated with a degreasing liquid, and a strainer 14 for removing coarse iron powder from the degreasing liquid after cleaning. An electromagnet 15 for removing iron powder that adsorbs and removes fine iron powder, a degreasing liquid recovery tank 17 that stores the recovered degreasing liquid, and a nozzle 11 of the articulated robot 12 from this tank 17 via a liquid supply pump 18. The degreasing liquid is supplied from the liquid feeding pipe 31 that is connected to the degreasing tank 30 via the liquid feeding pump 32 to the degreasing liquid recovery tank 16. It is configured.

In the apparatus constructed as described above, when the vehicle body W, which has undergone the required welding process, is transported to the iron powder removing apparatus 1 and held in a fixed position, the vehicle body W is moved to both sides of the transportation path. The arranged multi-joint robot 12 moves the nozzle 11 to each bag structure portion of the vehicle body W as taught in advance, and the degreased liquid recovery tank 1 via the liquid supply pipe 19.
The degreasing liquid supplied from 7 is discharged to remove the iron powder and the like adhering to the inner surface of the bag structure portion together with the oil.

On the other hand, the strainer 14 is rotated by receiving the degreasing liquid after washing containing iron powder and the like, while collecting the coarse iron powder and the like in the degreasing liquid by the slits provided on its peripheral surface. The iron powder removing electromagnet 15 described above adsorbs and removes the fine iron powder remaining in the degreasing liquid to regenerate the degreasing liquid, and then returns this to the degreasing liquid recovery tank 17.

When the vehicle body W that has been subjected to the iron powder removal treatment in this manner is then transported to the hot water tank 20 and immersed in the hot water, the hot water is the iron powder that adheres to the surface of the vehicle body W. At the same time, iron powder and the like that are attached to the bag structure in a peeled state are washed away, and then the vehicle body W is sent to the next degreasing tank 30 and immersed in the degreasing solution. After removing the press oil, rust preventive oil, etc. adhering to the surface of W, finally, under the showers 41 arranged on both sides of the transport path, the remaining iron powder etc. are removed by the discharged water. , Send it into a paint booth (not shown).

[0011]

As described above, according to the present invention, the degreasing liquid is discharged in front of a series of hot water tank and degreasing tank arranged as a coating pretreatment means to wash the bag structure portion of the object to be coated. Since the cleaning means is installed, iron powder, etc. adhering to the bag structure can be reliably removed together with the oil and washed off by the chemical cleaning action of the degreasing liquid and its mechanical discharge pressure. The iron powder, etc. gradually disposed from the bag structure can be reliably removed together with other cleaning treatments during the subsequent immersion treatment in the warm water liquid and the degreasing liquid. It is possible to prevent the problem that powder and the like are mixed into the electrodeposition coating solution to cause defects in the electrodeposition coating as much as possible.

Moreover, since the liquid to be degreased after the cleaning is made to flow back to the cleaning means through the iron powder removing means, the iron powder etc. remaining in the bag structure can be efficiently processed while suppressing the consumption of the degreasing liquid. Can be removed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an apparatus that constitutes an embodiment of the present invention.

[Explanation of symbols]

 10 Iron Powder Removal Device 12 Articulated Robot for Cleaning Bag Structure Part 14 Strainer 15 Electromagnet for Iron Powder Removal 17 Degreasing Liquid Recovery Tank 20 Hot Water Tank 30 Degreasing Tank 40 Washing Shower

Claims (1)

[Claims] 1. A cleaning means for discharging a degreasing liquid to clean a bag structure portion of an object to be coated, and a means for removing iron from the degreasing liquid after cleaning and returning the regenerated degreasing liquid to the cleaning means. A coating pretreatment device characterized in that it is disposed on the upper side of a series of hot water tanks and degreasing tanks arranged as coating pretreatment means.