JPH06226158A - Hanger treatment device in coating equipment - Google Patents

Abstract

PURPOSE:To efficiently clean a hanger without detaching the hanger from the conveyor of a coating line. CONSTITUTION:A hanger treatment device is equipped with an incineration furnace baking the hanger moved by a conveyor 11 while attached thereto and an impact device applying an impact to the hanger baked by the incineration furnace 30 to allow the cinders of a cured coating material to fall. The hanger after incineration is struck by the impact device and the cinders of the coating material are allowed to fall. If necessary, a water cooling device quenching the hanger heated by the incineration furnace 30 or a brush device allowing the cinders of the coating material stuck to the hanger to fall is used together. The cinders of the coating material on the hanger quenched by the water cooling device are peeled by the difference between the heat shrinkage factor of the hanger and that of the coating material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanger treatment device for removing paint adhered to a transport hanger in a coating facility.

[0002]

2. Description of the Related Art In a coating line where coating is automatically performed while being transported while being suspended by a hanger,
The coating material is also applied to the hanger that suspends the article to be coated, and the coating material is cured by passing through the baking and drying oven, so that the cured coating material adheres to the surface of the hanger. For this reason, a large amount of hardened coating material accumulates on the hanger as the number of coatings overlaps.When liquid coating is used, the workability and safety of the hanger are a problem, and electrostatic powder coating does not affect the material to be coated. The problem of poor paint adhesion occurs.

At present, alkali cleaning or the like is carried out in order to remove the hardened coating material adhered to the hanger, but in that case, it is necessary to take special measures for treating the chemical solution and handling the hanger. Therefore, there is a problem that the hanger processing device becomes large-scale and is not effective for powder coating material. For this reason, the hanger has been removed from the conveyor and placed in a furnace to burn the entire hanger to remove the paint.

[0004]

Therefore, conventionally, when removing the paint adhering to the hanger, it is necessary to stop the coating line and remove the hanger from the conveyor. During that period, the coating line is used. Can not do it. For this reason, it is attempted to select the time when the coating line is not operating, such as a holiday, but the work cannot be performed frequently, and thus a large amount of the paint may adhere to the hanger thickly. Coating with such hangers causes deterioration of coating quality.

For this reason, it is desirable to be able to automatically remove the cured coating material during normal painting work without removing the hanger from the conveyor for transportation, and to make the hanger processing device smaller than in the case of alkali cleaning. You also need to do it. Therefore, an object of the present invention is to provide an apparatus capable of automatically removing the paint attached to the hanger without stopping the conveyor even during the operation of the coating line.

[0006]

A hanger processing apparatus of the present invention developed to achieve the above object is a hanger for supporting an object to be coated, a conveyor for moving the hanger, and a conveyor for the hanger. The incinerator that burns this hanger while it is still attached to the hanger, and the impact that removes the burnt dust of the paint that adheres to the hanger by impacting the hanger that is burned by the incinerator while it is attached to the conveyor. And a device.

Depending on the form of the hanger, the type of paint, etc., a brush for immersing the hanger heated by the incinerator in a water tank for rapid cooling is also used, or a brush for scraping off the burnt dust of the paint attached to the hanger. It is also effective to use a device together.

[0008]

[Function] During the operation of the coating line, an empty hanger on which the coating is finished and the object to be coated is put down is introduced into the incinerator, so that the hardened coating adhered to the hanger is incinerated. Although the burner dust of the paint may adhere to the hanger that has passed through the incinerator, the burner dust of the paint is dropped by the impact applied to the hanger by the impact device.

When the water cooling device is also used, the heated hanger is immersed in a water tank and rapidly cooled, so that the paint burns more reliably due to the difference between the heat shrinkage ratio of the hanger and the heat shrinkage ratio of the paint. Is peeled off. In the case of using a brush device, the brush burns off the scum of the paint that could not be completely dropped from the hanger.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Painting equipment 1 shown in FIG.
The coating line No. 0 is equipped with a conveyor 11 for endless traveling by a motor (not shown). The conveyor 11 is provided with a plurality of metal hangers 12 (only a part of which are shown in FIG. 2) at predetermined intervals, and the article W is hung by the hangers 12.

A pretreatment device 15, a coating machine 16, a baking / drying furnace 17, a hanger treatment device 18 and the like are provided in the middle of the moving path of the conveyor 11. On the front side of the pretreatment device 15, there is a loading stage 20 for hanging the article W on the hanger 12. On the downstream side of the baking / drying furnace 17, there is an unloading stage 21 for unloading the article W from the hanger 12. In the pretreatment device 15, a well-known pretreatment such as degreasing is performed on the article W to be coated.

The coating machine 16 is for coating the object W to be hung on the hanger 12 by using a robot or the like. For example, the liquid paint is sprayed onto the object W by a coating gun, or Appropriate coating work such as electrostatic powder coating is automatically performed. Painted object W is hanger 12
Together with this, it is introduced into the baking / drying furnace 17 and the baking / drying step is carried out in a high temperature atmosphere.

The hanger treatment device 18 is provided with an incinerator 30 as shown in FIG. 3, and at the outlet side of the incinerator 30, the impact shown in FIG. 4 is provided as means 31 for removing paint scum. A device 32 is provided. Further, a water cooling device 33 shown in FIG. 5 or a brush device 34 shown in FIGS. 6 and 7 is provided as needed.

Inside the furnace wall 40 of the incinerator 30, a burner 41 for blowing a flame to the hanger 12 is provided.
In the incinerator 30, the hanger 12 is attached to the conveyor 11 and introduced into the furnace through the upper opening 42 of the furnace wall 40, and is taken out of the furnace again along a locus shown by a two-dot chain line in the figure. It has become so.

The impact device 32 is an impact generating actuator 4 such as an air cylinder that gives a mechanical impact to the hanger 12.
5 is provided, and by hitting the hanger 12 that is carried while being attached to the conveyor 11, the burnt residue of the paint adhering to the hanger 12 is peeled off and dropped by the impact. The hanger 12 may be tapped by a mechanical shock generating means other than the cylinder mechanism.

The water cooling device 33 is adapted to rapidly cool the hanger 12 by immersing the hanger 12 heated by the incinerator 30 in the water tank 50. Since the coefficient of thermal expansion of the metal hanger 12 and the coefficient of thermal expansion of the paint adhered to the hanger 12 are different from each other, by rapidly cooling the hanger 12, burnt residue of the paint is easily peeled off. In the case of the illustrated example, the hanger 12 remains attached to the conveyor 11 and draws a locus indicated by a two-dot chain line in the figure to draw the water tank 5.
It is introduced into the water from above 0, and after cooling, it is again sent out of the water tank 50.

The brush device 34 has a pair of brushes 56 and 57 rotated by a motor 55. The brushes 56 and 57 are provided on a frame 58 that can be opened and closed. And when the hanger 12 passes, the brush 5
As the brushes 56 and 57 close, the brushes 56 and 57 rotate while rubbing the surface of the hanger 12 while brushing the brushes 56 and 57.
Is configured to move in the vertical direction.

In the coating facility 10 equipped with the hanger processing device 18, while the conveyor 11 goes around the coating line, the object W to be coated and the hanger 12 are cleaned (removal of the adhered coating). That is, the article W attached to the hanger 12 at the loading stage 20 is sent to the pretreatment device 15 by the conveyor 11 and subjected to a predetermined pretreatment, and then the painting machine 16 automatically performs the painting. . In the coating machine 16, the coating material adheres to the hanger 12 as the coating object W is coated. The coated object W that has been painted is sent to the baking and drying furnace 17, where it is baked and dried, and then unloaded from the hanger 12 at the unloading stage 21.

The hanger 12 emptied through the unloading stage 21 is sent to the hanger processing device 18. In this hanger processing device 18, the hanger 1 to which the hardened paint is attached
When 2 passes through the incinerator 30, the hardened paint adhered to the hanger 12 is incinerated at a temperature of, for example, about 750 ° C to 900 ° C.

Then, by passing through the impact device 32, a mechanical impact is applied to the hanger 12 to remove the burnt residue of the paint. When the water cooling device 33 is used, the hanger 1 is heated to a high temperature by the incinerator 30.
2 is soaked in water to be rapidly cooled, and due to the difference between the heat shrinkage ratio of the hanger 12 and the heat shrinkage ratio of the paint, the burnt residue of the paint peels off. The brush device 34 scrapes off the amount of paint burned off from the hanger 12 by the rotation of the brushes 56 and 57.

The impact device 32, the water cooling device 33, and the brush device 34 can be effectively combined with each other according to the form of the paint, the shape and material of the hanger 12, and the like to effectively remove the burnt residue of the paint. It is possible. For example, incinerator 30
After introducing the hanger 12 that has passed through to the impact device 32, further passing through the water cooling device 33 to drop the burnt residue of the paint, or quenching the hanger 12 with the water cooler 33 to facilitate the removal of the burnt residue of the paint. After that, it may be hit with the impact device 32 to remove the paint scum. Alternatively, the brush device 34 is also used to scrape off the burnt residue of the paint.
The brush device 34 is suitable when the shape of the hanger 12 is relatively simple.

By using the hanger processing device 18, it is possible to introduce an empty hanger 12 into the hanger processing device 18 without stopping the conveyor 11 of the coating line, that is, during the normal coating process. , Can automatically and effectively clean the adhered paint. Note that it is not necessary to keep the hanger processing device 18 constantly operating, for example, after the hanger 12 is repeatedly used in a plurality of coating cycles,
The above-described cleaning process by the hanger processing device 18 may be performed at an appropriate time.

[0023]

In the past, it was necessary to remove the hanger from the conveyor and put it in the incinerator, but by installing the hanger processing device of the present invention, the coating line is operating without stopping the coating line. In addition, since it is possible to automatically remove the hardened paint that has adhered to the hanger and no labor is required, the hanger can be cleaned safely and efficiently. Moreover, since the paint can be removed before the paint has accumulated much on the hanger, it is also effective in maintaining good coating quality of the object to be coated. Further, the apparatus can be made smaller than that of the alkaline cleaning or the like.

[Brief description of drawings]

FIG. 1 is a schematic view of a coating facility equipped with a hanger processing device showing an embodiment of the present invention.

FIG. 2 is a side view showing a hanger and an object to be coated.

FIG. 3 is a sectional view of an incinerator used in the hanger treatment device shown in FIG.

4 is a side view of an impact device used in the hanger processing device shown in FIG.

5 is a sectional view of a water cooling device used in the hanger processing device shown in FIG.

FIG. 6 is a front view of a brush device used in the hanger processing device shown in FIG.

FIG. 7 is a side view of the brush device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Painting equipment, 11 ... Conveyor, 12 ... Hanger, 18 ... Hanger processing device, 30 ... Incinerator, 31 ... Paint burnt removal means, 32 ... Impact device, 33 ... Water cooling device, 34 ... Brush device.

Claims (3)

[Claims] 1. A hanger for supporting an object to be coated, a conveyor for moving the hanger, an incinerator for baking the hanger with the hanger attached to the conveyor, and a hanger baked by the incinerator. And a shock device for removing the burnt residue of the paint adhering to the hanger by applying a shock to the hanger while being attached to the conveyor. 2. The hanger treatment device according to claim 1, further comprising a water cooling device for rapidly cooling the hanger heated by the incinerator. 3. The hanger processing device according to claim 1, further comprising a brush device for scraping off the burnt dust of the paint adhering to the hanger.