JPH086532Y2 - Foreign matter removal device for paint cleaning line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an apparatus for effectively removing foreign matter generated in a paint cleaning line.

[Prior Art] Foreign matter generated in a coating cleaning line is generally generated in a process before chemical conversion treatment, that is, in a process such as cutting, punching, pressing, welding, etc. of a steel sheet, and includes burr dust, iron dust, thread Scrap etc. are mentioned as a foreign material.

These foreign substances can be removed by pre-washing the coating washing line (washing with hot water),
Preliminary degreasing, degreasing, etc. removes from the treated material (object to be coated) and accumulates as foreign matter in the tank of each step. These foreign substances should be taken out of the system by regular cleaning once or twice a month.
Or, it is taken out of the system using a continuous removal device.

Recently, however, there is a strong demand for improvement in coating quality, and in particular, in order to meet the demands for improving the appearance and sharpness of painting on automobiles, regular cleaning in the paint washing line of automobile bodies and removal of foreign substances by the existing continuous foreign substance removing device are satisfactory. It is not obtained, and it is actually a harmful effect. In other words, particles of about 20 to 30μ (micron) cannot be removed and remain on the surface of the object to be coated after being electrodeposited, so it is necessary to scrape them off and hinder the improvement of quality. The current situation is at issue.

As a device for continuously removing contaminants, there is a method of passing the liquid containing contaminants through cloths or nets combined with various meshes, and by passing it naturally or under pressure to force it, or using centrifugal force. Centrifugal separators are generally used in which solids are collected in the lower part of the device by utilizing the difference in specific gravity of foreign substances and are periodically drained.

[Problems to be Solved by the Invention] Although there are some examples in which the device for continuously removing the mixed foreign matter described above is relatively inexpensive, and the effect of the installation is also exerted,
In the method by excess, even if it is possible to remove up to about 20 to 30 μ by making the mesh of the cloth or net fine, there is a problem that it will not be able to withstand continuous use due to clogging in a short time. In addition, although the centrifugal separation method can remove relatively coarse foreign substances such as dust, fiber dust, and burrs, it has a drawback that fine foreign substances of about 20 μm cannot be removed.

[Means for Solving the Problem] As a result of an investigation for solving the above-mentioned problems, it was found that 90% or more of the foreign matter which is a problem when coating an automobile is iron powder of 20 μ or more. Also, of the foreign matter removing devices, the excessive method causes clogging and it is difficult to use continuously, and the centrifugal separation method can remove dust, fiber waste, and iron powder of 40 to 50 μ or more, but there is a problem. It was found that the iron powder of about 20 to 30μ cannot be removed.

The present invention makes use of the characteristics of the centrifugal separation system, separates coarse foreign substances such as dust, fiber dust, and burrs by the centrifugal force of the centrifugal separation device, and uses a magnetic force imparting device attached to the centrifugal separation device for 20 ~ In order to remove iron powder of 30μ, as a first idea, in a coating cleaning line that requires a treatment liquid flow rate of 100 to 200m ³ / Hr, a fluid inlet is at the upper part, a rectification zone is at the lower part, a drain port is at the lower end, Centrifugal separation device having fluid outlets at upper ends thereof to generate a vortex in a fluid containing foreign particles and to precipitate and separate foreign matter separated outward by the centrifugal force of the vortex, and the centrifugal separation The magnetic flux density is attached to the outer circumference of the rectification zone at the bottom of the device.
It consists of a magnetic force applying device capable of giving a magnetic force of 5,000 to 30,000 gauss.The magnetic force applying device winds a cylindrical member filled with a magnetic matrix with a solenoid electromagnet to give a magnetic force to effectively disperse the magnetic flux density. The magnetic matrix provides a foreign matter removing device for a paint cleaning line in which expanded metal having a spatial laminated structure is used. As a second invention, 100 to 200 m ³ / In a coating cleaning line that requires a Hr treatment liquid flow rate, a fluid inlet is provided at the top, a drain port is provided at the lower end, and a fluid discharge port is provided at the upper end.A vortex flow is generated in the fluid containing foreign particles, and the centrifugal force of the vortex flow is generated. Centrifugal separation device capable of precipitating and separating foreign matter separated outward by means of a rectifying device provided downstream of the fluid discharge port of the centrifugal separation device. And a magnetic force applying device attached to the outer circumference of the rectifying device and capable of giving a magnetic force of a magnetic flux density of 5000 to 30,000 gauss, the magnetic force applying device is a solenoid electromagnet around a cylindrical member filled with a magnetic matrix. It is possible to effectively disperse the magnetic flux density by applying a winding magnetic force with the magnetic matrix, and the magnetic matrix provides a foreign matter removing device for a coating cleaning line in which expanded metal having a spatial laminated structure is used. It is what

[Embodiment] An embodiment of a foreign matter removing device for a coating cleaning line according to the present invention will be described below with reference to the drawings.

FIGS. 1 (A), (B) and (C) show the first embodiment and the second embodiment.
Figures (A), (B) and (C) show the second embodiment.

First, FIG. 1A shows the first embodiment of the present invention.
This will be described with reference to (B) and (C).

In the figure, 1 is a centrifugal separation device, and 11 is a magnetic force applying device.

The centrifugal separator 1 is used to generate a vortex in a fluid containing foreign particles and to precipitate and separate the foreign matter separated outward by the centrifugal force of the vortex flow. The fluid inlet 2 is provided, and the fluid inlet 2
A swirl generating cut-in port 3 is formed in the downstream portion of the fluid, a rectifying band 4 is provided in the lower portion, a drain port 5 for draining the precipitated and separated foreign matter is provided in the lower end, and a fluid from which the foreign matter is removed is provided in the upper end. Is provided with a fluid discharge port 6 for discharging.

The rectification zone 4 is provided in the lower part of the centrifugal separator, and precipitates the foreign matter separated by the centrifugal force of the vortex flow by its own weight in a regular (static) flow region that is not affected by the vortex flow.

The magnetic force imparting device 11 is for imparting a magnetic force with a magnetic flux density of 5000 to 30000 gauss, and is attached to the outer periphery of the part of the rectifying zone 4 at the bottom of the centrifugal separation device 1. In order to effectively disperse the density, a cylindrical member 12A filled with a magnetic matrix 12 is provided inside the rectifying band 4, and a solenoid electromagnet 13 is wound around the rectifying band 4 so that a magnetic force can be applied. Is the best.

The magnetic matrix 12 has a laminated structure having a space inside by pulling a thin plate in which fine cuts are alternately inserted and superimposing expanded metal expanded in a wire mesh shape.
The expanded metal having such a space laminated structure is effective because it has a large surface area, a large magnetic force gradient can be obtained, and the magnetic flux density can be effectively dispersed.
Further, by using the expanded metal having the space laminated structure, even if the filamentous foreign matter is attached, it can be easily removed.

The magnetic matrix 12 may have a combined structure of iron balls or projecting plates.

 Next, the operation of the first embodiment of the present invention will be described.

First, in the centrifugal separation device 1, when a fluid containing foreign particles is introduced from the fluid inlet 2, the fluid passing through the vortex flow generation cutout 3 formed in the fluid inlet 2 becomes a high-speed vortex and moves downward. At this time, the foreign matter is separated outward as it flows downward by the centrifugal force, the foreign matter is precipitated and separated in the rectifying zone 4 provided at the lower part and collected in the drain port 5, and the fluid from which the foreign matter is removed is the center of the vortex flow. It is discharged from the fluid discharge port 6 through the section.

The foreign matters separated and removed by the rectification zone 4 are dust, most of fiber waste, and iron powder of 40 to 50 μ or more.

Further, in the magnetic force applying device 11, the solenoid electromagnet 13 may be a permanent magnet, but an electromagnet system is preferable because the magnetic force is cut off when the removed iron powder is taken out to facilitate draining together with other foreign matter. Another advantage of the electromagnet method is that a reverse magnetic circuit can be provided when draining the separated fine iron powder to facilitate draining of the iron powder.

The strength of the magnetic force is different depending on the size of the equipment depending on the amount of processing liquid, but it is 100 to 2 in a normal paint cleaning line.
A flow rate of 00m ³ / Hr is necessary for practical use, and the strength of the magnetic force required at that time is usually 5000 Gauss or more to obtain sufficient effect.
It is not necessary to give a magnetic force of 000 gauss or more considering the tank capacity (usually 200 to 250 m ³ or less) of the current automobile paint cleaning line scale, but when iron powder in highly viscous liquid is removed by this device. May require a large magnetic force of about 30,000 gauss.

The foreign matter removed by the magnetic force applying device 11 is iron powder having a particle size of 20 to 30 μm or less, which is finer than the foreign matter separated and removed by the rectification zone 4.

The second embodiment of the present invention is shown in FIG.
This will be described with reference to (B) and (C).

In the figure, the same parts as those in the first embodiment shown in FIGS. 1 (A), (B) and (C) are designated by the same reference numerals and the description thereof will be omitted.

Reference numeral 21 is a centrifugal separation device, 24 is a rectifying device, and 11 is a magnetic force applying device.

The rectifying device 24 is configured such that the rectifying band portion is independent of the centrifugal separation device 21.

The centrifugal separation device 21 is different from the first embodiment only in that the rectifying device 24 is provided downstream of the fluid discharge port 6 of the centrifugal separation device 21 separately from the centrifugal separation device 21, and the other parts are different. Is substantially the same as that of the first embodiment.

The magnetic force applying device 11 is substantially the same as the magnetic force applying device 11 of the first embodiment.

Next, an embodiment using the foreign matter removing device of the coating cleaning line according to the present invention will be described.

<Example 1> Table 1 shows a centrifugal separation device 21 in which a magnetic force imparting device 11 is attached to a rectifying device 24 provided separately from the centrifugal separation device 21 shown in FIG. For the purpose of investigating the effect of removing foreign matter and iron powder by the magnetic force imparting device 11, an alkaline cleaning liquid containing iron powder and foreign matter was put in a small-scale tank of about 1000 l, and the iron powder was produced by an experimental machine with a flow rate of 6 ton / hr. And the results of measuring the effect of removing foreign matter.

90% or more of iron powder and 70% or more of foreign matter are removed after 5 minutes in 12 minutes per cycle. When the removed contents are classified, the centrifugal separator 21 is iron powder,
Contains cider powder, cuttings, welding brazing material, sealer, adhesive, etc., iron powder is distributed in the particle size of 10 ~ 200μ, mainly 50μ or more is removed, while the magnetic force imparting device 11 The particles were distributed in the range of 5 to 50 μm, and iron powder having a fine particle size that could not be removed by the centrifugal separator 21 was removed.

<Experimental Example 2> Table 2 shows the results of the same investigation by attaching the magnetic force imparting device 11 to the static flow zone 4 below the centrifugal separation device 1 shown in FIG.

1 cycle 10 minutes, after 10 cycles, about iron powder and foreign matter
The removal rate was 80%. The removed contents are iron powder, cider powder, cutting waste, welding brazing material, sealer, welding agent, etc.,
The particle size of the iron powder was 5 to 150 μ, and the iron powder of 20 to 30 μ or less was 30% of the whole.

[Advantages of the Invention] Since the foreign matter removing device of the coating cleaning line according to the present invention is configured as described above, it is
It was possible to remove foreign particles of ~ 50μ or more and at the same time remove fine particles of iron powder of 20-30μ or less by the magnetic force applying device.

Further, this apparatus can circulate at a large flow rate, and a small amount of foreign matter and iron powder existing in a large volume of fluid can be continuously removed by a relatively small-scale apparatus.

[Brief description of drawings]

FIG. 1 (A) is a front view of a first embodiment of a foreign substance removing device for a coating cleaning line according to the present invention, FIG. 1 (B) is a side view of FIG. 1 (A), and FIG. 1 (C) is FIG. 1 (B) is a sectional side view, FIG. 2 (A) is a front view of a second embodiment of the foreign substance removing device for a coating cleaning line according to the present invention, and FIG. 2 (B) is FIG. 2 (A). FIG. 2C is a partial cross-sectional side view of the magnetism imparting device portion of FIG. 2B. DESCRIPTION OF SYMBOLS 1 ... Centrifugal separation device 2 ... Fluid inlet 3 ... Eddy current generation notch port 4 ... Rectification zone 5 ... Drain port 6 ... Fluid discharge port 11 ... Magnetic force applying device 12 ... Magnetic matrix 13 ... Solenoid electromagnet 21 ... Centrifugal separation device 24 … Rectifier

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Sekine 1-15-1 Nihonbashi, Chuo-ku, Tokyo Japan Parkerizing Co., Ltd. (72) Yufumi Usami 1-15-1 Nihonbashi, Chuo-ku, Tokyo Japan Parkerizing Incorporated (72) Inventor Akiyuki Ikemoto 2-16-9 Nihonbashi, Chuo-ku, Tokyo Parker Engineering Co., Ltd. (56) Reference JP 61-54280 (JP, A) JP 60-241914 ( JP, A) Actual opening 56-14671 (JP, U) Actual opening 58-137462 (JP, U) Actual opening 51-10671 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. In a coating cleaning line requiring a treatment liquid flow rate of 100 to 200 m ³ / Hr, a fluid inlet (2) is provided at the top, a rectifying zone (4) is provided at the bottom, a drain port (5) is provided at the lower end, and an upper end is provided. A centrifugal separation device (1) which is provided with a fluid discharge port (6) and which generates a vortex in a fluid containing foreign particles and can precipitate and separate the foreign particles separated outward by the centrifugal force of the vortex; A magnetic force imparting device (11) attached to the outer periphery of the lower rectifying zone (4) of the centrifugal separation device (1) and capable of imparting a magnetic force with a magnetic flux density of 5000 to 30000 gauss. In (11), the magnetic flux density can be effectively dispersed by winding a solenoid electromagnet (13) around a cylindrical member (12A) filled with a magnetic matrix (12) to give a magnetic force. Cage,
The magnetic matrix (12) is made of expanded metal having a spatially laminated structure, and is a foreign matter removing device for a coating cleaning line. 2. In a coating cleaning line which requires a treatment liquid flow rate of 100 to 200 m ³ / Hr, a fluid inlet (2) is provided at the top, a drain port (5) is provided at the lower end, and a fluid discharge port (6) is provided at the upper end. Centrifugal separation device (21), which is provided in each of which a vortex flow is generated in a fluid containing foreign particles, and by which centrifugal force of the vortex can separate and separate the foreign substances separated outward, and the centrifugal separation device (21). Rectifying device (24) provided downstream of the fluid discharge port (6), and a magnetic force applying device (11) attached to the outer periphery of the rectifying device (24) and capable of giving a magnetic force of a magnetic flux density of 5,000 to 30,000 gauss. ) And the magnetic force applying device (11) winds a cylindrical member (12A) filled with a magnetic matrix (12) around a cylindrical member (12A) with a solenoid electromagnet (13) to give a magnetic force to effectively disperse the magnetic flux density. It is possible to Magnetic matrix (12), the foreign matter removing apparatus of the paint washing line, characterized in that have been used expanded metal spatial laminated structure.