JP2016159249A - Gun cover for powder coating gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cleanability of a coating gun 1 and a fitting bracket 2 installed in a paint booth for powder coating.SOLUTION: A gun cover is mounted on the outer surface of a coating gun 1 and a fitting bracket 2 installed in a paint booth for powder coating, so as to be put into a state where the outer surface of the coating gun 1 or an uneven part of the fitting bracket 2 is not exposed. Hereby, a powder coating hardly adheres onto the outer surface of the coating gun 1 or the uneven part of the fitting bracket 2 during coating, and even if the powder coating adheres thereto, cleaning can be performed easily during color change.SELECTED DRAWING: Figure 5

Description

  The present invention prevents powder paint from adhering to a powder coating gun attached to a gun mounting bracket installed in a painting booth, and facilitates cleaning of the powder coating gun when changing colors. It relates to the body cover gun cover.

    Powder coating is generally performed in a coating booth, and overspray powder that has not adhered to the object to be coated is recovered by a recovery device and reused.

  By the way, as mentioned above, even if it collects overspray powder with a recovery device, a part of overspray powder adheres to the inner wall surface of a painting booth.

  For this reason, conventionally, when performing color change, the powder coating material adhering to the inner wall surface of the painting booth is removed and cleaned using a manual or automatic air blowing device (Patent Document 1).

Japanese Patent Laid-Open No. 11-300249

  In recent years, the cleanability of the painting booth has been improved and the cleaning time has been shortened. However, the cleanability of peripheral devices has not been considered much.

  In order to improve productivity, further reduction in color change time is required, and in order to prevent contamination, it is important to improve not only the painting booth but also the peripheral equipment.

  Conventionally, the painting gun 10 is installed in a painting booth using a mounting bracket 11 as shown in FIG.

  Since the outer surface of the coating gun 10 mounted using the mounting bracket 11 has an uneven portion, the powder coating is likely to adhere to the uneven portion, and the powder paint attached to the uneven portion is easily changed in color. Cannot be cleaned.

  Further, in the case of a corona discharge type coating gun 10 that charges a powder coating material by corona discharge, as shown in FIG. Reducing the amount of free ions that arrive (the ions that do not contribute to the charging of the powder coating material) has been greatly reduced.

  That is, since the mass of free ions is extremely light compared to the charged powder coating particles, it moves toward the nearest grounding body, so the ground electrode 12 is arranged slightly closer to the object to be coated than the discharge electrode. Then, it can absorb most of the excess free ions without lowering the coating efficiency, and can be expected to suppress the appearance failure of the coating film due to the reverse ionization phenomenon. Since the electric field between the electrodes is also weakened, the so-called Faraday cage effect is suppressed and the film thickness distribution can be improved.

  However, in order to mount the ground electrode 12 near the gun spray port of the paint gun 10, the lead wire 13 of the ground electrode 12 is exposed to the outer surface of the paint gun 10, so the lead wire 13 or the ground electrode 12 on the outer surface of the paint gun 10. The powder paint easily adheres to the portion, and it is necessary to clean the powder paint attached to the conductor 13 and the ground electrode 12 portion when the color is changed.

  In particular, in a large-scale powder coating apparatus, since the number of coating guns increases, it is very important to improve the cleaning performance of the coating gun 10, the mounting bracket 11, and the ground electrode 12.

  Therefore, an object of the present invention is to improve the cleanability of the painting gun and the mounting bracket installed in the painting booth.

  In order to solve the above-mentioned problems, the present invention is such that a gun cover is mounted on the outer surface of the painting gun and the mounting bracket installed in the painting booth so that the outer surface of the gun and the uneven portion of the mounting bracket are not exposed. Features.

  As the material for the gun cover, a material that does not easily adhere to the powder coating or a material that has undergone antistatic treatment is selected.

  The gun cover includes a cylindrical cover body, a nozzle cover attached to the tip of the cover body, and a bracket cover attached to the rear end of the cover body.

  The tip of the nozzle cover is covered with a ground electrode holder having a ground terminal, and the nozzle cover is provided with a connection terminal for the ground terminal, and the connection terminal and a conductor housed inside the cover body are connected. Good.

  According to the present invention, since the outer surface of the painting gun installed in the painting booth and the uneven portion of the mounting bracket are not exposed by the gun cover, the outer surface of the coating gun and the unevenness of the mounting bracket are applied during painting. It is difficult for the powder paint to adhere to the part, and even if the powder paint adheres to the gun cover, it can be easily cleaned when changing colors, so the color change time can be shortened and the cleanability can be improved. .

  Further, the tip of the nozzle cover is covered with a ground electrode holder provided with a ground terminal, and the nozzle cover is provided with a connection terminal of the ground terminal, and by connecting the connection terminal and a conductor housed inside the cover body, Since the lead wire of the ground terminal is not exposed on the outer surface of the paint gun, adhesion of the powder paint is reduced and cleaning is easy.

It is a perspective view shown in the state where a paint gun and a mounting bracket were removed. It is a perspective view shown in the state where the painting gun and the mounting bracket are attached. It is a perspective view shown in the state where the gun cover was put on the painting gun and the mounting bracket. It is a disassembled perspective view of a gun cover. It is a disassembled perspective view which shows the procedure which puts a gun cover on a coating gun and a mounting bracket. It is a perspective view of a ground electrode holder and a nozzle cover part. It is the perspective view which showed the nozzle cover part which mounted | wore with the earth electrode holder in the cross section. It is a perspective view which shows the state which attached the conventional coating gun to the attachment bracket.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows a painting gun 1 and a mounting bracket 2 for installing the painting gun 1 in a painting booth.

  The painting gun 1 and the mounting bracket 2 are attached by a fixing screw 3.

  When the coating gun 1 is attached to the mounting bracket 2, as shown in FIG. 2, there are uneven portions on the outer surfaces of the mounting bracket 2 and the coating gun 1, and if the powder coating adheres to the uneven portion, air blow It is difficult to clean.

  In the present invention, as shown in FIG. 3, the gun cover 4 is covered so that the unevenness between the coating gun 1 and the mounting bracket 2 shown in FIG. 2 is not exposed on the outer surface.

  The gun cover 4 includes a cylindrical cover body 4a, a nozzle cover 4b attached to the tip of the cover body 4a, and a hose cover 4c attached to the rear end of the cover body 4a.

  The cover body 4a and the nozzle cover 4b are detachably fixed to the cover body 4a by fixing screws 5.

  To attach the gun cover 4 to the painting gun 1 and the mounting bracket 2, as shown in FIG. 5, the cover body 4a is put on the painting gun 1 and the mounting bracket 2, and then the front and rear ends of the cover body 4a are attached. The cover body 4a and the nozzle cover 4b are fixed.

  The material of the gun cover 4 is selected from a material that is difficult for the powder paint to adhere to or a material that has been subjected to an antistatic treatment.

  As an example, in the case of a negatively charged gun, the powder coating is charged with a negative polarity, so the use of materials (resin materials such as PTFE and PE, inorganic materials such as alumina) located on the same polarity side in the charge train is necessary. preferable.

  On the other hand, in the case of a positively charged gun (including a friction gun), the powder coating is positively charged. Therefore, a material (resin such as nylon or POM, or inorganic such as glass, etc.) located on the same polarity (positive electrode) side in the charging train. Application of the material) is preferred.

  Next, in FIGS. 6 and 7, the tip of the nozzle cover 4b of the nozzle cover 4b attached to the tip of the cover body 4a is covered with a ground electrode holder 6 having a ground terminal 6a, and the nozzle cover 4b is covered with the ground terminal 6a. By providing the connection terminal 7 and connecting the ground terminal 6a of the ground electrode holder 6 and the conductor 8 accommodated in the gun cover 4 through the connection terminal 7 from the conductor 8 built in the gun cover 4, In this embodiment, the ground electrode conductor 8 is not exposed on the outer surface of the coating gun 1.

1: Coating gun 2: Mounting bracket 3: Fixing screw 4: Gun cover 4a: Cover body 4b: Nozzle cover 4c: Bracket cover 5: Fixing screw 6: Earth electrode holder 6a: Earth terminal 7: Connection terminal 8: Conductor

Claims (3)

  A gun cover for a paint gun that is mounted in a state in which the outer surface of the paint gun installed in the paint booth and the uneven portion of the mounting bracket are not exposed.   2. A gun cover for a paint gun according to claim 1, comprising a cylindrical cover body, a nozzle cover attached to the tip of the cover body, and a bracket cover attached to the rear end of the cover body.   The tip of the nozzle cover is covered with a ground electrode holder provided with a ground terminal, the nozzle cover is provided with a connection terminal for the ground terminal, and the connection terminal is connected to a conductor housed inside the cover body. A paint gun gun cover according to claim 2.

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