JPS61164668A - Electrostatic painting apparatus - Google Patents

Abstract

PURPOSE:To make it possible to perform simultaneous different-color painting in both side surfaces of a hanger having an article to be painted attached thereto, by forming a hanger from a first hanger part and a second hanger part and interposing an insulating wall between both hanger parts. CONSTITUTION:Paints having mutually different colors are sprayed to articles W to be painted such as car parts, which were respectively attached to the first hanger part 12 and second hanger part 13 of the hanger 11 conveyed so as to be held to a rail 3 in a suspended state, from spray guns 5a, 6a. Whereupon, the paints respectively emitted from the sprayguns 5a, 6a are deposited only to the desired articles W to be painted, all of which are opposed, by the insulating wall 15 positioned between both hanger parts 12, 13 without being deposited to the articles W to be painted in the side crossing over the insulating wall 15. Furthermore, a screen wall having relatively electrically opposite polarity to the articles W to be painted may be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrostatic coating device that performs IQ painting by painting different colors on both sides of objects attached to both sides of a hanger. .

(Prior art) Is static W1 painting usually grounded? ll coating wA pole,
The paint spraying device is used as a cathode, and a high negative voltage is applied to it to create an electrostatic field between the two poles, and the sprayed paint particles are negatively charged, allowing the paint to be efficiently adsorbed to the object to be coated, which is the opposite pole. This method is often used for painting parts for self-help vehicles, etc.

In recent years, electrostatic coating equipment for performing electrostatic M coating has become self-supporting, and paint spraying has become possible! The equipment used is an electrostatic coating machine equipped with an automatic spray gun.

In addition, in order to increase the efficiency of the coating line, as shown in FIG. An electrostatic coating device 2 that sprays paint has come into use.

In this static N coating device 2, hooks 4 are attached to both sides of a hanger 1 that is movably suspended from a rail 3 that connects each process.
is formed, and the object W to be coated is attached to the hook 4. The rail 3 is connected to a ground end E, and the object W to be coated is grounded via the rail 3 and the hanger 1, and serves as a relative anode. On both sides of the hanger 1, there are spray guns 5a that spray negatively charged paint toward the object W attached to both sides of the hanger 1.
, electrostatic coating equipment with 5a! ! 15.6 is installed.

The spray guns 5a, 5a are each rotated around a rotating shaft 7.8 so as to uniformly spray the paint onto the object W to be coated. And each spray gun 5a,
From 5a onwards, paint of the same color may be sprayed, and
In some cases, the object W to be coated may be coated with different colors on both sides of the hanger 1 by spraying paints of different colors.

(Problems to be Solved by the Invention) However, with such a conventional electrostatic coating device, there is no problem when spraying paint of the same color from the spray guns 5a, 5a, but when spraying different paints from each spray gun, there is no problem. When doing so, various inconveniences occurred. That is, as shown in FIG.
The negative-polarity IFI sprayed from the hanger 1 may adhere to the objects W attached to the opposite sides of the hanger 1, and there is a risk that the paint will mix and the desired paint color will not be obtained. Ta. In addition, in order to solve this inconvenience, if the object to be coated W attached to the hanger 1 is removed from one side and painted one side at a time, the work of attaching and removing the object to be coated W becomes complicated. , there was a risk that workability would be poor and production costs would increase.

The present invention has been made in view of these conventional problems, and it is possible to successfully apply different colors on both sides of the hanger to which the object to be coated is attached at the same time, thereby reducing the work involved in the painting process. The purpose is to improve sexuality.

(Means for Solving the Problems) The present invention aims to achieve the above object by spraying charged paint discharged from the spray guns of an electrostatic coating machine facing each other on both sides of a hanger. In an electrostatic coating device configured to spray onto objects to be coated, each of which has a first hanger portion and a second hanger portion to which the object to be coated is attached only on one side facing the electrostatic sprayer, the first hanger portion and the second the hanger is formed by the first hanger part and the second hanger part, and the respective static
This electrostatic coating apparatus is characterized in that an insulating wall or a screen wall having electrically opposite polarity relative to the object to be coated is provided between the coating machines.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view of the front side of a (iy+ electrocoating apparatus) according to an embodiment of the present invention, and members common to those shown in FIGS. 4 and 5 are given the same reference numerals.

In the illustrated electrostatic coating apparatus [10], a rail 3 is laid above the electrostatic coating machines 5.6 that are installed facing each other at a predetermined interval, and a hanger 11 is moved on this rail 3. Allows pull-ups to be held. This hanger 11 is bifurcated, consisting of a first hanger part 12 and a second hanger part 13, with the first hanger part 12 and the second hanger forming a part.
3, a hook 4 is attached only to one side facing each electrostatic coating station 15.6 when the hanger 11 is located between the respective electrostatic coating machines 5.6. Therefore, when the object W to be coated is attached to each hook 4, the object W attached to the hook 4 of the first hanger 12 faces the electrostatic coating station jlt5, and is attached to the hook 4 of the second hanger 13. The attached object W to be coated faces the electrostatic coating machine 6.

The rail 3 is connected to the ground end E, and the object W to be coated is grounded via the rail 3 and the hanger 11. Thereby, the object W to be coated serves as an anode relative to the paint. Electrostatic automatic coating machine 5.6 has hanger 11
The spray gun 5a has spray guns 5a, 5a for spraying negatively charged paint toward a workpiece W attached to the spray gun 5a.

6a rotates around the rotation axis 7.8 to rotate the object W to be coated.
The paint is sprayed evenly towards the surface.

On the other hand, between each electrostatic 1'JA 5.6
A support member 14 is installed on the floor at a position corresponding to between the hanger part 12 and the second hanger part 13, and an insulating wall 15 is provided upright on the support member 14.

Next, the operation of the electrostatic coating device 10 shown in FIG. 1 will be explained. Hanger 11 suspended from rail 3 and transported
Paints of different colors are sprayed from the respective spray guns 5a and 6a toward the objects W attached to the first bunker part 12 and the second hanger part 13, respectively. Then, the first hanger part 12 and the second hanger part 1
3, an insulating wall 15 is located between the static N
The paint discharged from the spray gun 5a of the coating machine 5 is
All the objects to be coated W attached to the first hanger section 12 are coated without being coated on the objects W attached to the hanger section 13 . Similarly, all the paint discharged from the electrostatic coating (j16 spray gun 6a) will be applied to the object W attached to the second hanger portion 13.

Figure 2.3 shows the electrostatic coating device M1 according to the embodiment of the present invention.
0, and instead of the insulating wall 15 shown in FIG.
A screen Wl 5a having an electrically opposite polarity relative to the object W connected to the ground IE, that is, the same polarity as the paint, is erected on the support part v114. This screen wall 15a is made of a conductive material, and by connecting it to a power source 16, it has an electrically opposite polarity to that of the object W to be coated. The configuration other than this is the same as that shown in FIG. 1 described above.

FIG. 2 shows the state of flow of paint particles when the electrostatic coating device 110 shown in FIG. 2 sprays paints of different colors onto the object W to be coated.

As shown in the figure, some of the negatively charged paint particles sprayed from each spray gun 5a, 6a adhere directly to the object to be coated W, which serves as a relative anode, while others head toward the hanger 11. be. The paint particles heading toward the bunker 11 are repelled by the screen wall 15 because the screen wall 15 has the opposite polarity to the object W, i.e., the same polarity as the paint particles 15, and eventually go around the object W. It will get stuck and stick. Therefore, each spray gun 5
The paint particles of different colors sprayed from a and 5a no longer cross the screen wall 15 and adhere to the object W attached to the hanger on the opposite side. Further, paint hardly adheres to the screen wall 15. In this way, the screen wall 1
If the polarity of 5a is opposite to that of the object W to be coated, even in the case shown in FIG. 1, since the insulating wall 15 is in a charged state, it has the effect of repelling the paint. , it is possible to repel paint more strongly.

It should be noted that the present invention is not limited to the above-described embodiment, and the positively charged paint may be sprayed toward the object W to be coated from each of the spray guns 5a and 6a.

However, in that case, the object W and the screen wall 15
The relative polarity of each of a needs to be opposite to the actual ffl IM above.

(Effect of the Invention) As described above, according to the present invention, the charged paint discharged from the spray guns of the electrostatic capacitors installed opposite to each other is applied to both sides of the hanger. In the electrostatic coating we which is configured to spray onto the objects to be coated, each of which has a first hanger section and a second hanger section to which the object to be coated is attached only on one side facing the electrostatic atomizer, the above-mentioned A hanger is formed between the first hanger part and the second hanger part, and between each of the P# electric coating layers, an electrically opposite wall is formed between the first hanger part and the second hanger part relative to the insulation wall or the object to be painted. By installing a polar screen wall, it is possible to simultaneously apply different colors of paint on both sides of the hanger to which the object to be painted is attached, improving the workability of the painting process and reducing manufacturing costs. contributes to the decline.

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view showing an electrostatic coating apparatus according to one embodiment of the present invention, and FIG. 2 is a front cross-sectional view showing an electrostatic coating apparatus according to another embodiment of the present invention. Figure 3 is an enlarged sectional view of main parts showing the flow state of paint particles in the electrostatic coating apparatus shown in Figure 2, Figure 4 is a sectional view of the front side of the conventional electrostatic coating apparatus, and Figure 5 is FIG. 3 is a cross-sectional view showing the flow state of paint particles in the electrostatic coating device shown in FIG. DESCRIPTION OF SYMBOLS 11... Hanger, 3... Rail, 4... Hook, 5.6... Electrostatic coating machine, 5a, 5a... Spray gun, 12... First hanger part, 13... - Second hanger part, 15...insulating wall, 15a...screen wall. Patent applicant: Nissan Motor Co., Ltd. I4f5 2nd cause S2, -I6

Claims (1)

[Claims] In an electrostatic coating device that sprays charged paint discharged from spray guns of electrostatic coating machines installed opposite each other onto objects to be coated that are attached to both sides of a hanger, each of the above-mentioned The hanger is formed by a first hanger part and a second hanger part to which the object to be coated is attached only on one side facing the electrostatic coating machine, and the hanger is arranged between the first hanger part and the second hanger part. An electrostatic coating apparatus characterized in that an insulating wall or a screen wall having electrically opposite polarity relative to the object to be coated is provided between each of the electrostatic coating machines.