JPH065423Y2 - Electro-deposition coating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an electrodeposition coating apparatus for coating a peripheral surface of an object to be coated such as a cab of a vehicle.

[Conventional technology]

Not only for household products and lighting equipment, but for painting automobile parts,
For example, it is carried out by an electrodeposition coating method as shown in Japanese Patent Publication No. 45-13240.

Conventional car parts such as cabs are electro-deposited by immersing car parts 4 such as cabs suspended by a hanger 3 in a paint solution 2 in a paint tank 1 filled with a paint solution 2 as shown in FIG. Are doing.

[Problems to be solved by the device]

However, an unpainted portion is formed after coating due to the cause of the air 5 remaining on the automobile parts such as the cab during the dip coating.

The present invention has been made to solve the above drawbacks.
It is an object of the present invention to provide an electrodeposition coating apparatus capable of preventing the generation of an unpainted portion after coating due to air remaining on an object to be coated.

[Means for Solving the Problems]

In order to achieve the above object, the electrodeposition coating apparatus according to the present invention is an electrodeposition coating apparatus in which an object to be coated is dipped in a coating solution in a coating tank to coat the object. A lid-shaped hanger is mounted via an airtight holding mechanism, and a vacuum pump for exhausting the sealed air is provided via a suction pipe.

[Action]

When the air sealed in the upper part of the paint tank is sucked by the vacuum pump, the upper surface of the liquid surface of the paint tank is decompressed and the air remaining on the object to be coated is discharged to the outside of the paint liquid. Therefore, the occurrence of unpainted parts is prevented.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of an electrodeposition coating apparatus according to the present invention.

In the figure, 10 is a paint tank which is a large container for accommodating a cab of an automobile, and an airtight holding mechanism 12 is provided on an upper portion 11 of the paint tank 10. Airtight holding mechanism 12
Is composed of a rotatable openable / closable holding plate 14 hinged to the upper part 11 of the paint tank 10 via a bracket 13, and a support plate 15 provided inside the upper part 11 for supporting the open / close holding plate 14 in a horizontal position. Has been done. A groove 16 having a U-shaped cross section is formed at the upper end of the open / close holding plate 14, and a soft sealing member 17 made of rubber or the like is filled in the groove 16 at the bottom as shown in FIG. ing. The open / close holding plate 14
The hinge coupling portion 18 is also provided with a soft sealing member 19 made of rubber or the like. Also, the upper part 1 of the paint tank 10
A hanger 21 that suspends a cab (object to be coated) 20 of an automobile via the airtight holding mechanism 12 is mounted on the first unit 1. As shown in FIG. 3, the hanger 21 is a lid-like member made of a rectangular plate that is curved outward, and an engaging protrusion 22 that engages with the groove 16 is provided below the outer periphery of the hanger 21. There is. The engaging ridge 22 on the hanger 21 side and the groove 16 on the airtight holding mechanism 12 side are engaged with each other to be held airtight. A hoist chain 23 is provided on the upper part of the hanger 21, and a grip portion 24 for gripping the cab 20 of the automobile is provided on the lower part side. The cab (object to be coated) 20 of the automobile is suspended by a hanger 21 placed on the open / close holding plate 14 of the airtight holding mechanism 12, and the hanger 21 suspending the cab 20 of the automobile is the upper portion 11 of the paint tank 10.
And is immersed in the coating liquid 25 in the coating tank 10. In addition, a hanger 21 is provided on the upper portion 11 of the paint tank 10.
The vacuum pump P for removing the air 26 on the coating liquid 25 hermetically sealed by placing the
It is provided through.

When painting the cab (object to be coated) 20 of the automobile, first, as shown in FIG. 3, the cab 20 of the automobile is held and suspended by the holding portion 24 provided on the hanger 21.

Next, the cab 20 suspended by the hanger 21 in the paint tank 10 in which the open / close holding plate 14 of the airtight holding mechanism 12 is opened.
When the predetermined height position, that is, the position of the cab 20 is lowered below the position where the open / close holding plate 14 is provided, the open / close holding plate 14 is horizontally tilted and closed.

After that, the engaging protrusion 2 of the hanger 21 is inserted into the groove 16 filled with the sealing soft member 17 of the horizontally opened / closed holding plate 14.
2 is engaged and a hanger 21 is placed on the open / close holding plate 14 to hermetically seal the upper portion 11 of the paint tank 10 and the hanger 2
The coating liquid 2 in the paint tank 10
Immerse in 5. After that, the sealed air 26 on the coating liquid 25 is exhausted by driving the vacuum pump P, and the electrodeposition coating is performed while depressurizing the inside of the sealed upper portion 11 of the coating tank 10. At this time, the air (air bubbles) remaining in the cab 20 separates from the cab (object to be coated) 20 and rises above the coating liquid 25, but the air is simultaneously sucked by the vacuum pump P to the outside of the coating tank 10. Exhausted.

After the electrodeposition coating, the hoist chain 23 on the hanger 21 is raised to pull up the cab 20, and at the same time the paint tank 10
The open / close holding plate 1 of the airtight holding mechanism 12 provided on the upper portion 11.
Painting is completed by opening 4 and pulling out the cab 20 to the outside of the paint tank 10. By this electrodeposition coating, a good electrodeposition coating layer having no unpainted portion is applied around the cab 20.

In the above embodiment, the airtight holding mechanism 1 in which the hanger 21 can be opened and closed.
It is provided on the paint tank 10 through the hanger 2
The same effect can be obtained even if 1 is made as large as the opening area of the upper portion 11 of the paint tank 10 and is provided on the paint tank 10 via a simple airtight holding mechanism that does not open and close.

INDUSTRIAL APPLICABILITY The present invention can be applied not only to the cab of an automobile but also to other parts of a vehicle, parts of various machines, etc. for electrodeposition coating of objects to be coated.

[Effect of device]

As described above, according to the present invention, a lid-shaped hanger for suspending an object to be coated is placed on the upper portion of the coating tank via an airtight holding mechanism, and a vacuum pump for exhausting the airtight air is provided via a suction pump. As a result, it is possible to prevent the generation of unpainted matter after coating due to the air remaining on the article to be coated.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part of FIG. 1, FIG. 3 is a perspective view of a hanger portion showing a state in which a cab of an automobile is suspended, and FIG. [Fig. 6] is a schematic cross-sectional view of a conventional example. 10 ... Paint tank 11 ... Upper part 12 ... Airtight holding mechanism 20 ... Cab (object to be coated) 21 ... Hanger 25 ... Paint liquid 26 ... Air 27 ... Suction pipe P ... Vacuum pump

Claims (1)

[Scope of utility model registration request] 1. In an electrodeposition coating apparatus for dipping and coating an object to be coated in a coating liquid in a coating tank, a lid-shaped hanger for suspending the object to be coated above the coating tank is provided with an airtight holding mechanism. An electro-deposition coating apparatus, characterized in that a vacuum pump for exhausting air that has been placed and sealed is provided via a suction pipe.