JPH03107495A - Method and device for electrodeposition coating - Google Patents

Abstract

PURPOSE:To efficiently and uniformly electrodeposition-coating many small articles by dipping a container for the articles to be coated in a coating in a coating tank and rotating the container. CONSTITUTION:The articles 2 to be coated are placed in the container 1. A chain conveyor 5 is moved to dip the container 1 in the coating 10 in the coating tank 9. The chain driving motor is driven to move the chain 13 to rotate the container 1. Consequently, all the parts of the articles 2 are brought into contact with the coating 10, and coating efficiency is enhanced. Furthermore, defective coating is prevented, and many articles are uniformly coated at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrodeposition coating method and an apparatus thereof, and more particularly to an electrodeposition coating method that can efficiently and uniformly coat small objects. and its equipment.

Prior Art A method of uniformly coating small items such as door hinges by electrocoating is known (for example, Japanese Patent Application Laid-Open No. 1108-1983).
Publication No. 98 etc. ).

When electrocoating small items like this, it is inefficient to paint them one by one, so conventionally, a large number of small items were hung on a hanger, and the hanger was placed in a paint tank before electrocoating. It was common to do so.

However, even with this method, the worker
It is necessary to hang a large number of small items to be painted one by one on hangers, and this hanging work causes a significant decrease in painting efficiency.

Therefore, a method has been proposed in which a large number of small items are placed in a container having a wall surface through which the paint can pass, and the container is placed in a paint tank and electrocoated while being shaken.

Problems to be Solved by the Invention With this method, there is no need to hang a large number of small items one by one on a hanger, and it is possible to efficiently perform electrodeposition coating on a large number of small items. However, if you simply apply electrocoating while shaking the container containing the small object to be painted, depending on the shape of the small object, air entrained by the small object may remain in the paint, or the paint may fail. The small objects to be coated overlap each other and are coated with some parts in contact with each other. As a result, there are parts that do not come in contact with the paint, making it extremely difficult to uniformly apply the electrodeposition coating.

OBJECTS OF THE INVENTION The first object of the present invention is to provide an electrodeposition coating method that can efficiently and uniformly apply electrodeposition coating to a large number of small objects. The object of the present invention is to provide an apparatus capable of carrying out a coating method.

Structure of the Invention A first object of the present invention is to place an article to be painted in a painted article storage container whose wall surface is configured such that at least a portion of the wall is permeable to the paint, and to insert the painted article storage container into a paint tank. This is achieved by immersing it in the paint inside and performing electrodeposition coating while rotating it.

A second object of the invention is to accommodate an article to be painted;
a painted article storage container having at least a portion of its wall surface configured to allow paint to pass therethrough; a paint tank; a container moving means for moving the painted article storage container into and out of the paint tank; and a rotating means for rotating the painted article storage container. This is accomplished by an electrodeposition coating apparatus equipped with container rotation means.

In the present invention, the number of times it is desirable to rotate the container containing the article to be coated varies depending on the size, shape, etc. of the article to be coated, and cannot be generalized, but can be easily determined experimentally. can do.

Effect of the Invention According to the present invention, a container containing an article to be painted is immersed in the paint in a paint tank, and electrodeposition is performed while rotating the container, so that the air entrained in the article to be painted is removed. ,
Even if a large number of items to be painted overlap each other and some of them are in contact with each other and are placed in a container, rotating the container will ensure that the paint will not escape. Since a large number of articles are reliably separated from each other, it is possible to eliminate parts of the articles that do not come into contact with the paint, and it is possible to efficiently and uniformly electrocoat a large number of articles.

EXAMPLES Hereinafter, examples of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a schematic perspective view of a container for accommodating articles to be coated, which is used in an electrodeposition coating apparatus according to an embodiment of the present invention.

In FIG. 1, a large number of articles 2 to be painted are placed in a cylindrical coated article storage container 1 whose wall surface is made of wire mesh, and the coated article storage container 1 is located at the center of both sides. , are supported by the support member 3. Although not shown, the coated article storage container 1 is constructed by locking two semi-cylindrical members at both side edges, and one of the locking parts is unlockable. By opening the two semi-cylindrical members around the other lock portion formed on one side edge of the semi-cylindrical member, the article 2 to be coated can be accommodated therein. It has become.

The upper part of the support member 3 is made up of a rod-shaped member 3a extending substantially parallel to the axis of the cylindrical coated article storage container 1, and both ends thereof are connected to a pair of chain conveyors 5 via a fixture 4.
installed on.

FIG. 2 is a schematic perspective view of the fixture 4, in which both ends of the rod-shaped member 3a of the support member 3 are received in its recesses 4a.

FIG. 3 is a schematic front view showing the state during electrodeposition coating, and as shown in FIG. 3, the pair of chain conveyors 5 are
Each is engaged at the painting station with a pair of gears 6.7.8 driven by a motor (not shown). Gears are also provided at other stations and between them, and when the motor is driven and these gears are rotated, the chain conveyor 5 is moved, and as a result, the coated article storage container 1 is also moved. Further, the article 2 to be coated is transferred from a storage station (not shown) in which the article 2 to be coated is stored in the coated article storage container 1 to the coating station.
After the electrodeposition coating is completed, it is configured to be further moved to a washing station and a drying station (not shown).

As shown in FIG. 3, the gear 8 is located lower than the gear 6.7, and the part of the chain conveyor 5 to which the fixture 4 is attached moves from the gear 6 to the gear 8. As this progresses, the coated article storage container 1 moves downward toward the paint tank 9, and when the fixture 4 reaches the lower end of the gear 8, the coated article storage container 1 is completely moved into the paint tank 9. It is designed to be immersed in the paint 10 inside.

Further, as shown in FIG. 4, the cylindrical coated article storage container 1 has protruding shafts 11 on both end faces thereof, and each of these shafts 11 is equipped with a gear 12.
are integrally formed, and these shafts 11 are rotatably fitted to the support member 3.

As shown in FIGS. 3 and 4, in the painted position where the attachment 4 is located at the lower end of the gear 8, a chain (not shown) that can be engaged with the gear 12 of these shafts 11 is attached. A chain 13 is provided which is movable by a drive motor.

In the electrodeposition coating apparatus according to the embodiment of the present invention configured as described above, first, at the storage station (not shown), the lock portion of one side edge of the coating article storage container 1 that can be unlocked is released. After the article 2 to be coated is placed in the container 1, and the lock part on the opened side edge of the container 1 is locked, a motor (not shown) is driven and the gear is turned on. is rotating. Chain conveyor 5 starts moving. chain conveyor 5
As the painted article storage container 1 is attached to the chain conveyor 5 via the fixture 4 and the support member 3,
Also sent from the receiving station to the painting station. The part of the chain conveyor 5 to which the fixture 4 is attached passes through the gear 6 and is sent downward toward the paint tank 9.
When the lower end of the gear 8 is reached, the gear 12 and chain 13 of the shaft 1 protruding from both end surfaces of the cylindrical painted article storage container 1 are removed.
are engaged, the drive of the motor is stopped, and the coated article storage container 1 containing the article 2 to be coated stops at the coating position while being immersed in the paint 10 in the paint tank 9. Thereafter, a chain drive motor (not shown) is driven, and the chain 13 is moved to the right in FIG. 3, and the gear 12 of the shaft 11 engaged with the chain 13 is moved counterclockwise in FIG. The coating article storage container 1 which rotates and contains the article 2 to be coated also rotates counterclockwise.

In this way, by performing electrodeposition coating while rotating the coated article storage container 1, even if the article 2 to be coated is accommodated in the coated article storage container 1 with air entrained in it, it will not be entrained. This allows air to escape from the paint 10 without fail, and also allows the air to escape from the paint 10.
Even if they are stored in the coated article storage container 1 in an overlapping state, they can be separated from each other, so that the paint 10 can be applied to all the objects to be painted stored in the coated article storage container 1. It becomes possible to contact all parts of 2. Therefore, in order to increase coating efficiency, a large number of articles 2 are housed in the coated article storage container 1,
- Overall, even when electrodeposition coating is applied, it is possible to reliably prevent coating defects caused by the existence of parts of the article that do not come in contact with the paint IO, and at the same time, it is possible to reliably prevent coating defects on a large number of articles. It becomes possible to apply electrodeposition coating uniformly.

The present invention is not limited to the above-mentioned examples, but various modifications can be made within the scope of the invention described in the claims, and these are also included within the scope of the present invention. Needless to say.

For example, in the embodiment described above, a cylindrical container 1 for storing painted articles is used, but it is also possible to use a polygonal cylindrical container similar to a cylinder.

Furthermore, in the embodiment described above, the coated article storage container 1 is rotated by the chain 13, but the means for rotating the coated article storage container 1 is not limited to this.

Further, in the above embodiment, the gears 6, 7, and 8 were used as drive gears, but these were replaced with rotatable rollers,
Alternatively, a drive gear driven by a motor may be provided.

Effects of the Invention According to the present invention, it becomes possible to efficiently and uniformly apply electrodeposition coating to a large number of small items.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a container for accommodating articles to be coated, which is used in an electrodeposition coating apparatus according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing the shape of the fixture. Third
The figure is a schematic front view showing the state during electrodeposition coating. FIG. 4 is a schematic side view showing the engagement portion between the coated article storage container 1 and the support member and chain. DESCRIPTION OF SYMBOLS 1... Painted article storage container, 2... Article to be painted, 3... Supporting member, 3a... Rod-like member of supporting member, 4... Mounting tool, 4a... ... recess of fixture, 5.11 chain conveyor, 6.7.8 ... gear, 9 ... paint tank, lO ... paint, 11 ... shaft of painted article storage container , 12...Gear, 13...Chain. ~ε Figure 4

Claims (2)

[Claims] (1) Place the article to be painted into a painted article storage container whose wall surface is configured to allow the paint to pass through at least a portion, and immerse the painted article storage container in the paint in the paint tank and rotate it. An electrodeposition coating method characterized by performing electrodeposition coating. (2) moving a painted article storage container capable of accommodating an article to be painted and having at least a portion of its wall surface permeable to the paint, a paint tank, and the painted article storage container into and out of the paint tank; An electrodeposition coating apparatus comprising a container moving means and a container rotating means for rotating the coated article storage container.