JPH0631851U - Electrostatic coating equipment - Google Patents

Abstract

(57) [Summary] [Purpose] A coating for UV or electron beam curable coatings that can coat the coating evenly or unevenly on a flat surface and has a coating efficiency close to 100%. Get the electric coating equipment. [Structure] A grounded plate material 12 is arranged between the object to be coated 2 and a mist disposal booth 10 which are arranged opposite to a well-known rotary atomization electrostatic coating device body 1, and the plate material 12 is arranged below the grounded plate material 12.
A paint reservoir 15 for accumulating the paint 13 that has been applied and dripped is disposed, and the viscosity of the paint 13 is adjusted by a viscosity adjusting device 18 and then filtered by a filter 19 and returned to the paint tank 6. The paint atomized from the cup 4 of the coating apparatus main body 1 is applied almost uniformly to the object to be coated such as the uneven shape by adjusting the electrostatic attraction and the force of the shaping air.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electrostatic coating device.

[0002]

[Prior art]

 Conventionally, a cup-type rotary atomizing electrostatic coating device supplies, for example, ultraviolet ray or electron beam curable coating material into a cup that rotates at high speed while applying a high voltage, atomizes it from the end of the cup, and The electrostatic attraction that works between the and the cup and the drag force of the shaping air that sprays along the outer circumference of the cup cause the particles to fly and adhere to the object to be coated, and the uncoated paint is exhausted by the fan in the mist disposal booth. Was.

[0003]

[Problems to be solved by the device]

 According to the electrostatic coating device described above, when the object a is uniform and has no irregularities, the coating of the coating is uniform and even, and the coating efficiency is as good as 90%. As shown in FIG. 2, when there are many irregularities or a flat plate-like shape, a large amount is applied to the convex portions and the end portions, and the thickness of the coating film tends to be uneven. Therefore, in order to make the penetration into the recesses better than in the past and to coat the entire surface of the object as evenly as possible, even if the coating effect due to the electrostatic attraction is reduced, the shaping air can be used to penetrate into the recesses. I was there. However, when the shaping air is increased, there is a disadvantage that the amount of paint that escapes backward increases and the coating efficiency decreases, for example, 60%.

An object of the present invention is to eliminate the waste of the coating material due to the decrease in the coating efficiency of the related art.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention arranges a grounded plate material between an object to be coated and a mist disposal booth, which are opposed to the main body of the electrostatic coating device, and hangs from the plate material under the plate material. It is characterized in that a paint reservoir for collecting the falling electron beam or ultraviolet curable coating paint is arranged and the paint reservoir is connected to a paint tank via a viscosity adjusting device and a filter.

[0006]

[Action]

 From the cup, the electrostatic force of attraction and air are applied to the object to be coated, and the coating particles that escape to the rear without being applied to the object to be coated are applied to the plate material placed between the object and the mist disposal booth. Since this paint is an ultraviolet or electron beam irradiation type paint, it does not dry or cure, so it drops from the bottom and is collected in the paint reservoir. The viscosity of the paint in the paint reservoir is adjusted by the viscosity adjuster, filtered by the filter and returned to the paint tank.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a rotary atomizing electrostatic coating apparatus main body supported by an insulating support member, 2 is an object to be coated, and the electrostatic coating apparatus main body 1 is rotated by an air motor 3 as is well known. A cup 4, a paint nozzle (not shown) connected to a paint tank 6 via a pipe 5, and a shaping air nozzle (not shown) connected to a compressed air source (not shown) via a pipe 7. The cup 4 has a high voltage applied to the ground, and the paint supplied from the paint nozzle into the cup 4 is atomized and discharged from the edge of the cup 4 which rotates at high speed. Due to the electrostatic attractive force acting between the object to be coated 2 and the force of the air jetted from the shaping air nozzle, the coating particles fly toward the object to be coated and adhere. The article to be coated 2 is suspended by a trolley conveyor 8 and grounded, and is housed and arranged in a booth 9 together with the electrostatic coating apparatus main body 1. A mist disposal booth 10 is provided with a filter 11 on the side of the electrostatic coating apparatus main body 1.

The above structure is not particularly different from the conventional one.

In the present invention, a grounded plate material 12 is arranged between the article to be coated 2 and the mist disposal booth 10, and the ultraviolet or electron beam curable paint 13 dripping from the plate material 12 is arranged below the grounded plate material 12. A paint reservoir 15 having a guiding portion 14 for guiding the is arranged. The paint reservoir 15 was connected to a viscosity adjusting device 18 via a pipe 17 with a pump 16 interposed, and the viscosity adjusting device 18 was connected to the paint tank 6 via a pipe 19 via a pipe 17. The viscosity adjusting device 18 has a solvent tank 20 for adjusting the viscosity of the paint from the paint reservoir 15 and returning it to the paint tank 6 via a filter 19 for reuse.

In FIG. 1, reference numeral 21 is a pump for supplying paint to the paint nozzle.

[0012]

[Effect of device]

 Since the present invention has the structure as described above, it can apply the coating material to the surface of the uneven or flat object to be coated almost uniformly, and has a UV or electron emission efficiency of nearly 100%. It has effects such as obtaining an electrostatic coating device for line-curing paint.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a perspective view of one side of an object to be coated.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electrostatic coating device main body 2 Coating object 4 Cup 6 Paint tank 9 Booth 10 Mist disposal booth 12 Plate material 15 Paint reservoir 18 Viscosity adjusting device 19 Filter

Claims (1)

[Scope of utility model registration request] 1. A grounded plate member is arranged between an object to be coated and a mist disposal booth, which are arranged opposite to the electrostatic coating apparatus main body, and an electron beam or ultraviolet ray curable type which drips from the plate member is disposed below the plate member. An electrostatic coating device characterized in that a paint reservoir for collecting the applied paint is arranged and the paint reservoir is connected to a paint tank via a viscosity adjusting device and a filter.