JP3513362B2 - Painting pretreatment equipment - Google Patents

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 performing pretreatment such as cleaning and degreasing of an object to be coated by spraying a treatment liquid. The present invention relates to a pretreatment apparatus for coating, which is provided with a spraying means for treating the spraying solution, a recovery tank for recovering the sprayed solution, and a circulation means for supplying the processing solution in the recovery tank to the spraying means.

[0002]

2. Description of the Related Art In this type of coating pretreatment device, fine foreign substances such as iron powder and polishing powder that have adhered to the object to be treated are contained in the recovery treatment liquid to the recovery tank. To supply the treatment liquid to the spraying means and reuse the treatment liquid for the treatment of the coating object, in order to prevent reattachment of fine foreign matter to the coating object and ensure high coating quality, the treatment of the recovery tank It is necessary to remove fine foreign matter from the liquid.

This removal process is conventionally performed by referring to FIG.
As shown in (a), the processing liquid L is taken out from the bottom portion of the recovery tank 4, and the dedicated circulation paths 15 and 16 for returning the taken-out liquid L to the recovery tank 4 again, or as shown in FIG. Circulation path 5 for sending the processing liquid L from the recovery tank 4 to the spraying means S
A liquid cyclone X is provided in the liquid cyclone X, and fine foreign matter such as iron powder is separated from the treatment liquid L by the centrifugal separation effect of the liquid cyclone X (see, for example, JP-A-6-33299). Reference numeral 17 is a filter for removing liquid from the fine foreign matter D separated by the liquid cyclone X.

Further, as shown in FIG. 7 (a), the dedicated circulation paths 15 and 16 similar to the above, or as shown in FIG. 7 (b) , the treatment liquid L is supplied from the recovery tank 4 to the spraying means S. A magnet type iron powder removing device Y is provided in the circulating circuit 5, the iron powder is adsorbed and collected from the treatment liquid L by the rotating magnet m, and the adsorbed iron powder D is scraped from the rotating magnet m by the scraping device k. There was also a format for taking and collecting.

[0005]

However, any of the above-mentioned conventional devices requires expensive devices such as a hydrocyclone and a magnet type iron powder removing device.
To obtain a high foreign matter removal effect, a large number of small-capacity liquid cyclones (generally, the smaller the processing capacity of a liquid cyclone, the smaller the separable particle size) that can separate even small-sized foreign particles are required, Or, a plurality of magnet type iron powder removing devices are required, which causes a problem of high device cost.

In view of the above situation, the main object of the present invention is to achieve a high foreign substance removal effect by adopting a rational foreign substance removal system for removing fine foreign substances such as iron powder and sharpening powder from the treatment liquid. It is possible to reduce the cost of the device while obtaining it.

[0007]

[1] According to the first aspect of the present invention, a plurality of slant rises are defined in which ascending flow path regions for guiding the treatment liquid from the recovery tank to the take-out tank are partitioned from each other by slanting partition walls in parallel postures. Since the flow path is subdivided into sub-flow passages, the sedimentary fine foreign matter in the processing liquid can be promptly removed from the bottom wall of each of the upward flow passages (that is, the inclined partition walls on the bottom side) during the process of passing through these many upward flow passages. It is possible to settle and settle to the bottom, and thereby, the settling fine foreign matter such as iron powder and sharpening powder can be efficiently separated from the treatment liquid.

By this, from the take-out tank to the spraying means,
It is possible to supply a clean processing liquid in which fine foreign matter is efficiently separated and removed, while fine foreign matter that has settled and settled on the bottom wall of each inclined rising passage is lowered along the inclined bottom wall, The accumulated foreign matter can be collected in a portion of the ascending flow path area facing the lower end entrance, and the collected foreign matter can be collected by an appropriate collecting method.

As for the separation structure, a simple and inexpensive structure in which the ascending flow path region is subdivided into a large number of slanted ascending flow paths is sufficient. From these facts, a large number of small-capacity liquid cyclones and large-capacity or multiple Compared with the above-mentioned conventional apparatus which requires the magnet type iron powder removing apparatus, it is possible to obtain a high foreign matter removing effect while reducing the apparatus cost, which makes it possible to easily improve the coating quality.

Further, in the case of the separation structure in which the ascending flow path region is subdivided into a large number of inclined rising flow paths in this manner, a large number of small-capacity liquid cyclones and a large capacity or a plurality of magnet type iron powder removing devices are provided. Compared with, the installation space can be reduced, which is also advantageous in this respect.

[2] In the invention according to claim 2, in the polymerization tank structure in which the liquid storage portion of the recovery tank and the liquid storage portion of the extraction tank are vertically overlapped with each other at the formation position of the ascending flow path region, Since the flow path area and the take-out tank are integrated, the installation space can be reduced.

Then, the spray liquid of the spraying means for the object to be coated is received by the flow-down plate in a state of covering the upper opening of the take-out tank and flowed into the recovery tank, and the upper part of the take-out tank is covered by the spraying means. Since it is used in the coating material treatment area, the space saving as a whole can be more effectively realized in combination with the above-mentioned polymerization tank structure.

[3] In the invention according to claim 3, the separated foreign matters descending along the inclined bottom wall of each inclined ascending flow channel are settled from the lower end inlet of the ascending flow channel region to the bottom of the recovery tank facing the lower end inlet. The sediment is collected and taken out together with the treatment liquid from the bottom of the recovery tank, and separated from the treatment liquid by the post-separation means. That is, by this, the foreign matter separated from the treatment liquid in a number of inclined rising flow channels in the rising flow channel area can be efficiently and easily collected together with other settling foreign matter in the recovery tank.

The post-separation means only separates the foreign matter previously separated from the passing processing liquid in the ascending flow path region and accumulated on the bottom of the recovery tank from the processing liquid accompanying the removal of the sediment from the recovery tank. (In other words, it treats a concentrated treatment liquid containing a large amount of foreign matter), it is possible to use a large number of liquid cyclones or a large number of liquid cyclones that process a large amount of non-concentrated treatment liquid in the above-mentioned conventional device. The processing capacity is much smaller than that of the magnet type iron powder removing device on the stand. In this respect, the device cost can be reduced compared to the conventional device even if a large number of inclined rising passages are formed. Also, the installation space can be reduced.

[4] In the invention according to claim 4, since the treatment liquid separated from the sediment (the foreign matter taken out from the recovery tank) by the post-separation means is returned to the recovery tank, the amount of the liquid retained in the recovery tank is returned by this liquid return. In this state, it is possible to continuously perform the foreign substance collection by the separation in the post-separation unit in a state in which the treatment of the coated object by the spraying unit can be performed in parallel. Compared with taking out the sediment accumulated at the bottom of the tank together with the treatment liquid at a time and separating and recovering it by the separating means,
The post-separation means can have a smaller processing capacity.

Further, the post-treatment of the collected foreign matters can be facilitated by avoiding concentration of the treatment load, and the consumption of the treatment liquid can be greatly reduced.

[5] In the invention according to claim 5, the treatment liquid sent from the recovery tank to the post-separation means together with the sediment (the foreign matter taken out from the recovery tank) is concentrated by the concentrating means and then sent to the post-separation means. The post-separation means can be processed with a smaller processing capacity, and even if the concentration means is added,
Compared with separating and recovering the sediment taken out from the recovery tank from the treatment liquid by only one-stage post-separation means, the cost of the apparatus can be further reduced.

Further, since the treatment liquid on the dilution side sent out from the concentrating means is returned to the recovery tank, a simple one having no liquid returning function to the recovery tank is used for the post-separating means in the subsequent stage, but the concentration means As in the invention according to claim 4, the amount of the liquid retained in the recovery tank is maintained by the liquid return of the above, and the foreign matter recovery by the concentration by these concentration means and the separation by the post-separation means is performed by the spraying means. Can be done continuously in parallel with.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] FIG. 1 shows a pretreatment apparatus for painting or cleaning a precoated object 1 to be coated, and reference numeral 2 denotes the article 1 (in this embodiment, an automobile body). Prior to loading into the coating booth for coating, the object-to-be-treated area in which the object-to-be-coated 1 is positioned, 3 is the object-to-be-treated area 2
In the above, the nozzle group 4 serving as the spraying means S for treating the object 1 by spraying the treatment liquid L (the cleaning liquid in the case of cleaning and the degreasing liquid in the case of degreasing) is the spraying liquid L by the nozzle group 3 (that is, A collecting tank 5 and P1 for collecting a processing liquid obtained by performing a cleaning action or a degreasing action on the object 1 are a circulation path and a pump as a circulating means J for supplying the processing liquid L of the collecting bath 4 to the nozzle group 3, By this pumping, the treatment liquid L in the recovery tank 4 is repeatedly used for treating the object to be treated in the object treating area 2.

Reference numeral 6 is a take-out tank, 7 is an ascending flow path region for allowing the processing liquid L to flow from the recovery tank 4 to the take-out tank 6, and the pump P is used.
The supply of the processing liquid from the recovery tank 4 to the nozzle group 3 by means of 1 is performed from the recovery tank 4 through the ascending flow path region 7 and the take-out tank 6.

As shown in FIGS. 1 and 2, the ascending flow passage region 7 is subdivided into a large number of inclined ascending flow passages 9 partitioned by parallel plate-like inclined partition walls 8. In the process of passing through the ascending rising channel 9, the settling fine foreign matter in the treatment liquid L is promptly settled on the bottom wall (that is, the inclined partition wall 8 on the bottom side) of each inclined rising channel 9 and taken out. The sedimentary fine foreign matter is efficiently separated and removed from the treatment liquid L flowing into the tank 6.

That is, while the recovery liquid L to the recovery tank 4 contains fine foreign matter such as iron powder and sharpening powder adhered to the article 1 to be coated, in the ascending flow path region 7 as described above. A clean processing liquid L from which fine foreign matter has been removed to the nozzle group 3 by foreign matter removal.
This prevents deterioration of the coating quality due to re-adhesion of fine foreign matter such as iron powder and grinding powder to the article 1 when the treatment liquid L is reused.

Regarding the tank structure, the recovery tank 4 and the take-out tank 6
A basic tank 10 for partitioning and forming is formed inside, and a first vertical partition wall 11 and a second vertical partition wall 12 are provided in parallel with each other inside the basic tank 10. The first partition wall 11 is a partition wall whose upper end is higher than the liquid surface and whose lower end is higher than the tank bottom in the liquid.
The partition wall 12 has a top end lower than the liquid level and a bottom end reaching the tank bottom. In this partition structure, a space between the first partition wall 11 and the second partition wall 12 is used as an ascending flow path region 7, and a large number of flat plate-like inclined partition walls in an inclined posture when viewed in the arrangement direction of these partition walls 11, 12. 8 between the first partition wall 11 and the second partition wall 12, respectively, and the partition area on the side facing the lower end inlet of the ascending flow path area 7 is the recovery tank 4, and the upper end of the ascending flow path area 7 The compartment area on the side facing the entrance is used as the extraction tank 6.

That is, as shown in FIG.
The liquid reservoir is a first partition that is a partition for the ascending flow path region 7.
Formed laterally of the cut wall 11 and below the ascending flow path region 7.
In addition, the liquid storage section of the take-out tank 6 is raised at the same liquid level.
It is a partition above the ascending flow path region 7 and for the ascending flow path region 7.
It is formed so as to extend laterally of the second partition wall 12 and has a polymerization tank structure in which the liquid storage part of the recovery tank 4 and the liquid storage part of the take-out tank 6 are vertically overlapped with each other at the formation position of the ascending flow path region 7, and the recovery is performed. The tank 4, the ascending flow path region 7, and the take-out tank 6 are collectively arranged. Then, as shown in FIG. 1, the nozzle group 3 is supplied.
The treatment liquid L is the second partition wall 12 in the liquid storage portion of the take-out tank 6.
So that it can be taken out from the lateral part of the liquid reservoir located on the side of the
I am doing it.

The upper area of the recovery tank 4 and the take-out tank 6 is the above-mentioned treated area 2 for spraying the treatment liquid L onto the article 1 by the nozzle group 3, while the take-out tank 6 is used. The upper opening of the above is covered by a falling plate 13 descending toward the collection tank 4, and the processing liquid L falling from the nozzle group 3 onto the upper part of the take-out tank 6 is received by the falling plate 13. It is made to flow into the recovery tank 4.

The bottom of the recovery tank 4 which the lower end inlet of the ascending flow path region 7 faces has an inverted pyramid shape, and when foreign matter is separated in the ascending flow path region 7, the bottom wall 8 of each inclined ascending flow path 9 bottoms. Then, the foreign matters descending along the inclined bottom wall 8 are settled and accumulated from the lower end inlet of the ascending flow path region 7 to the lowermost end of the inverted pyramid-shaped bottom of the recovery tank 4.

Reference numeral 14 is a liquid cyclone as a concentrating means N, and the sediment D is taken out together with the treatment liquid L by the pump P2 from the lowermost end of the inverted pyramid-shaped bottom in the recovery tank 4, and the taken-out sediment D is taken out from the outlet 15. To the liquid cyclone 14 via.

In the liquid cyclone 14, the pump P2
A swirl flow around the longitudinal axis is formed in the vessel by the liquid inflow by the sediment, and the sediment D
Treatment liquid L flowing in together with (foreign matter taken out from the recovery tank 4)
Concentrate. Then, the processing liquid L on the dilution side from the upper outlet
1 (in other words, the processing liquid from which the foreign matter D has been removed) is delivered,
The processing liquid L2 on the concentration side is sent out from the lower outlet.

The treatment liquid L1 on the dilution side is returned to the recovery tank 4 via the return passage 16, while the treatment liquid L2 on the concentration side is filtered by the conveyor type filter 17 as the post-separation means B (in other words, in other words). , The foreign matter D is deliquored), and by this filtering treatment, the foreign matter D contained in the treatment liquid L2 on the concentration side is separated and collected, and the collected foreign matter D is conveyed to the recovery container 18 by the conveyor filter 17. to recover.

In the collection of foreign matter by concentration in the liquid cyclone 14 and separation by the conveyor type filter 17, the amount of liquid retained in the basic tank 10 is maintained by returning the diluting side processing liquid L1 to the recovery tank 4 and nozzles are retained. It is continuously carried out in a state in which it is possible to carry out the parallel treatment of the article to be coated by spraying the liquid from the group 3.

Regarding the processing liquid L from which the foreign matter D has been separated by the conveyor type filter 17, the processing liquid L is returned to the recovery tank 4 together with the dilution side processing liquid L1 from the hydrocyclone 14, or a very small amount. Therefore, any method of discarding the return to the recovery tank 4 and discarding may be adopted.

[Second Embodiment] In FIG. 3, 20 is a centrifugal dehydrator as a post-separation means B, and in this embodiment, the concentrating means N is omitted,
From the bottom end of the inverted pyramid-shaped bottom of the recovery tank 4 to the pump P
The sediment D taken out together with the treatment liquid L by 2 is sent to the centrifugal dehydrator 20 via the outlet 15.

Then, in the centrifugal dehydrator 20, as a separation process from the treatment liquid L, the taken-out sediment D (foreign matter taken out from the recovery tank 4) is subjected to a deliquoring process by the motor power, and sent out from the centrifugal dehydrator 20. The deliquored foreign matter D is collected in the collection container 18.

Further, the processing liquid L3 separated from the foreign matter D by the centrifugal dehydrator 20 and sent out from the centrifugal dehydrator 20 is the return passage 1
In the state where the liquid is returned to the recovery tank 4 via 6, and the liquid amount held in the basic tank 10 is maintained by the liquid return to enable the parallel processing of the object to be coated by the nozzle group 3. The collection of foreign matter by the centrifugal dehydrator 20 is continuously performed.

In FIG. 3, the other device configuration is the same as that of the first embodiment.

[Third Embodiment] In FIG. 4, 21 is a conveyor type filter as the post separation means B, 22 is a recovery valve for opening and closing the outlet passage 15,
In this embodiment, the batch system is adopted, and the recovery valve 2
2 is opened, and the sediment D collected in the inverted pyramid-shaped bottom of the recovery tank 4 is sent to the conveyor type filter 21 together with the treatment liquid L through the outlet passage 15 by the downflow method to the conveyor type filter 21. (In other words, the dewatering process for the foreign matter D) separates and collects the foreign matter D in the extraction processing liquid L,
The collected foreign matter D is collected in the collection container 18 by being conveyed by the conveyor type filter 21 .

The treatment liquid L from which the foreign matter D has been separated by the conveyor type filter 21 is disposed in the collection tank 4 by a method of discarding it, or by once receiving it in another tank and then returning it to the collection tank 4 by pumping. Any of the returning methods may be adopted.

In FIG. 4, the other device configuration is the same as that of the first embodiment.

[Other Embodiments] Next, another embodiment will be listed.

The article 1 to be coated may be something other than an automobile body, and the treatment of the article 1 to be coated before spraying by spraying the treatment liquid from the spraying means S is not limited to washing or degreasing. Other pre-coating treatments may be used.

The concrete shapes and structures of the recovery tank 4 and the take-out tank 6 can be modified in various ways, and the inclined rising passages 9 are made flat as in the above embodiments. Instead of
As shown in FIG. 5, each inclined ascending flow path 9 may be a tubular flow path.

The spraying means S for processing the article to be coated 1 by spraying the processing liquid is not limited to the nozzle group 3 as in the above embodiment, but various spraying types can be adopted.

As the post-separation means B, various types of separation methods such as various types of filters such as a conveyor type filter and various types of dehydrators such as a centrifugal dehydrator can be adopted.

The concentration means N is not limited to the liquid cyclone, and various concentration methods can be adopted.

[Brief description of drawings]

FIG. 1 is a side view showing a device configuration of a first embodiment.

FIG. 2 is a front sectional view of an ascending flow path region.

FIG. 3 is a side view showing a device configuration of a second embodiment.

FIG. 4 is a side view showing a device configuration of a third embodiment.

FIG. 5 is a cutaway perspective view of an ascending flow path portion showing another embodiment.

FIG. 6 is a side view showing the configuration of a conventional device.

FIG. 7 is a side view showing another conventional device configuration.

[Explanation of symbols]

L treatment liquid 1 coated object S spraying means 4 collection tanks J Circulation means 7 Ascending flow path area 6 take-out tank 8 inclined partition 9 Inclined flow path 2 Area to be coated 13 Flowing board D sediment B after separation means L3 separation treatment liquid N enrichment means L1 dilution side processing solution

Claims (5)

(57) [Claims] 1. A spraying means for processing an object to be coated by spraying a treatment liquid, a collecting tank for collecting the spraying liquid, and a circulation means for supplying the processing liquid in the collecting tank to the spraying means. A pretreatment apparatus for coating provided, wherein an extraction tank is provided to allow the processing liquid to flow from the recovery tank through the ascending flow path region, and as a supply of the processing liquid from the recovery tank to the spraying means by the circulation means. A configuration in which a processing liquid is supplied from the recovery tank to the spraying means via the rising flow path region and the take-out tank, and the rising flow path region is divided into a large number of inclined rising walls which are partitioned from each other by inclined partition walls in a parallel posture. A vertical view that is subdivided into flow paths and separates the rising flow path area from the liquid storage section of the take-out tank
A partition wall for energizing is provided, and the upper end of this partition wall is
Lower than that of the same tank,
Above the ascending flow path region and to the side of the partition wall
And a treatment liquid that is formed over the spraying means and is supplied to the spraying means.
Out of the liquid reservoir located on the side of the partition wall
A pretreatment device for painting. 2. A tank structure in which a liquid storage portion of the recovery tank and a liquid storage portion of the take-out tank are vertically overlapped with each other at a position where the ascending flow path region is formed, and the upper part of the take-out tank is covered by the spraying means. A coating material treatment area for spraying a treatment liquid onto a coating material, and by a falling plate in a state of covering the upper opening of the extraction tank,
The coating pretreatment apparatus according to claim 1, wherein the spraying liquid from the spraying means is received and flowed into the recovery tank. 3. The recovery tank has a tank structure in which a bottom end of the ascending flow path area faces the bottom of the recovery tank, and the sediment separated and settled in the ascending flow path area is treated together with a treatment liquid from the bottom of the recovery tank. 3. The pretreatment apparatus for coating according to claim 1 or 2, wherein the precipitating material is taken out and the taken-out sediment is separated from the processing liquid by a post-separation means. 4. The pre-coating treatment apparatus according to claim 3, wherein the treatment liquid separated from the sediment by the post-separation means is returned to the recovery tank. 5. Concentration means for concentrating the treatment liquid taken out from the bottom of the recovery tank and sent to the post-separation means together with sediment is provided, and the treatment liquid on the dilution side sent from the concentration means is returned to the recovery tank. The coating pretreatment apparatus according to claim 3 or 4, which is configured.