JPH0631210A - Powder paint transfer device - Google Patents

Abstract

PURPOSE:To obtain a uniform film by uniformizing the emitting amount of powder paint from a painting gun by blowing air in the suction pipe connected to the paint suction port of an injector in a powder paint transfer device transferring the powder paint to the painting gun. CONSTITUTION:An injector 9 is constituted by connecting a supply hose of compressed air 23 to the rear part of an injector body 22 and connecting a transfer hose 24 to the front part thereof and forming a paint suction part 10 to the upper part of the injector body 22. In the powder paint transfer device thus constituted, compressed air 23 is supplied to the injector 9 in such a state that air 21 is blown in the injector from an air blowing-in port 20. Whereupon, a distribution plate 14 is pushed by the rotation of a screw 3 and the discharged powder paint in a receiving container 1 is drawn in the powder paint suction port 10 of the injector 9 while dispersed by the air 21 blown in the suction pipe 11 and transferred to a painting gun 25 through the transfer hose 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder coating material conveying device for conveying a powder coating material to a coating gun by an injector.

[0002]

2. Description of the Related Art In an electrostatic powder coating device, a powder coating material supplied from a coating material supply source such as a powder coating material storage container or a coating material hopper is compressed by a compressed air using an injector. Is being transported to.

By the way, the powder paint supplied from a paint supply source such as a container for the powder paint or a paint hopper is often solidified without being dispersed.

In particular, in the case of fine powder or powder coating having a large angle of repose, it is often a lump.

When the powder coating material is quantitatively supplied from the coating material supply source to the injector, the powder coating material is rectified for quantitative determination before being supplied to the injector.
Powder coating tends to harden due to rectification.

However, if powder paint is supplied to the paint suction port of the injector while it is solidified, the paint suction port may be clogged or the hose up to the coating gun may be clogged, causing the powder coating material to reach the coating gun. It will be difficult to transport them uniformly. This causes a problem that the amount of powder coating material discharged from the coating gun changes and the coating film becomes non-uniform.

In view of this, the present invention is intended to supply the powder paint in a dispersed state to the paint suction port of the injector so as to make the discharge amount of the powder paint from the coating gun uniform.

[0008]

According to the present invention, in order to solve the above-mentioned problems, air is blown into an inlet pipe connected to a paint suction port of an injector.

[0009]

[Effect] As a result, even if the powder coating material supplied from the powder coating material supply source is solidified, before the powder coating material is sucked into the paint suction port of the injector, it is blown into the inlet pipe by the blown air. Distributed.

Therefore, the powder coating material is supplied in a dispersed state to the coating material suction port of the injector.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG.

In this embodiment, as a powder coating supply source,
A screw 3 that is driven to rotate by a motor 2 is provided at the bottom of the container 1 for powder coating material, and the rotation of the screw 3 causes a discharge port 4 provided at the side of the bottom of the container 1 on the tip side of the screw 3 A quantitative supply device for quantitatively discharging the powder coating material in the storage container 1 is used.

The rear end of the shaft of the screw 3 is pulled out to the outside of the storage container 1 and is connected to the motor 2 via a joint 5.

A lid 6 is provided on the upper surface of the storage container 1. A stirring rotary wheel 7 is rotatably supported in the lower layer portion of the storage container 1. Protrusions 8 that enter into the pitch gap of the screw 3 are provided on the peripheral surface of the stirring rotary wheel 7 at predetermined intervals, and the stirring rotary wheel 7 rotates in association with the rotation of the screw 3. There is.

An inlet pipe 11 connected to the paint suction port 10 of the injector 9 is provided on the side of the discharge port 4. The upper part of the inlet pipe 11 is extended and opened above the discharge port 4. A spring accommodating chamber 12 is provided on the side of the inlet pipe 11 facing the discharge port 4. A support shaft 13 is connected to the tip of the shaft of the screw 3 so as to penetrate the intake pipe 11 and the spring accommodating chamber 12. Support shaft 1 in the intake pipe 11
A rectifying plate 14 that closes the end face of the discharge port 4 is movably fitted on the support shaft 3 along the support shaft 13. This straightening plate 1
The support shaft 13 on the back surface side of 4 is covered with a pipe 15 whose tip is drawn into the spring accommodating chamber 12, and the rear end of this pipe 15 is fixed to the back surface of the current plate 14.
A spring 16 for pressing the current plate 14 against the discharge port 4 is fitted on the support shaft 13 in the spring accommodating chamber 12. A receiving plate 17 for receiving the tip of the spring 16 is provided at the tip of the support shaft 13 so as to be movable with respect to the support shaft 13.
The strength of the spring 16 can be adjusted by rotating and moving the screw-type cap 18 at the end of No. 2.

An air introducing port 19 is connected to the spring accommodating chamber 12 and the inside thereof is maintained in a positive pressure state. This prevents the powder from flowing into the spring accommodating chamber 12.

The inlet pipe 11 has an inner wall surface facing the discharge port 4, the discharge port 4 and the paint suction port 1 of the injector 9.
An air inlet 20 is formed on the inner wall surface between 0,
Air 21 is blown into the inlet pipe 11 from the air inlet 20. The air inlet 20 is provided on the inner wall surface of the inlet pipe 11 facing the outlet 4 as shown in FIG.
Individually formed. In addition, the discharge port 4 and the injector 9
The air inlet port 20 formed on the inner wall surface of the inlet pipe 11 between the inlet pipe 1 and the paint inlet 10 is, as shown in FIG.
The air inlet 2 is directed not to the center of 1 but to the wall side.
The air 21 blown from 0 is swirled around the intake pipe 11.

In the injector 9, a supply hose for compressed air 23 is connected to the rear of an injector body 22 having a venturi inside, a transfer hose 24 is connected to the front, and a paint inlet 10 is formed on the upper surface. ing. A coating gun 25 is connected to the tip of the transfer hose 24.

In the powder coating material conveying device configured as described above, when compressed air 23 is supplied to the injector 9 with the air 21 being blown into the inlet pipe 11, the screw 3 When the powder paint in the storage container 1 discharged by pushing the rectifying plate 14 is dispersed by the air 21 blown in the intake pipe 11, the paint suction port 10 of the injector 9 is rotated.
To the paint gun 25 through the transfer hose 24.
Be transported to.

Next, in the second embodiment of the present invention shown in FIG. 5, the porous pipes 26 are fitted respectively above and below the inlet pipe 11, and the air blown from the air inlet 20 is It is adapted to be blown into the inlet pipe 11 through the porous pipe 26, and the other structure is the same as that of the first embodiment.

The third embodiment of the present invention shown in FIG. 6 is different from the first embodiment in the supply source of the powder coating material, and in this embodiment, above the rotating table feeder 27,
A paint hopper 28 is provided, and the powder paint discharged from the paint hopper 28 onto the upper surface of the table feeder 27 is scraped off quantitatively by the scraper 29 into the inlet pipe 11. The other structure is the same as that of the first embodiment.

[0022]

As described above, according to the present invention, since the powder coating material is supplied in a dispersed state to the coating material suction port of the injector, the discharge amount of the powder coating material from the coating gun becomes uniform and uniform. There is an effect that a different coating film can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic overall view showing a first embodiment of the present invention.

FIG. 2 is a partially enlarged view of the above embodiment.

FIG. 3 is an inner view of the inlet pipe facing the outlet.

FIG. 4 is a cross-sectional view of the air inlet portion of the inlet pipe.

FIG. 5 is a schematic view showing a part of a second embodiment of the present invention.

FIG. 6 is a schematic diagram showing a part of a third embodiment of the present invention.

[Explanation of symbols]

 1 Storage Container 2 Motor 3 Screw 4 Discharge Port 5 Joint 6 Lid 7 Rotating Wheel for Stirring 8 Protrusion 9 Injector 10 Paint Suction Port 11 Inlet Pipe 12 Spring Storage Chamber 13 Support Shaft 14 Rectifying Plate 15 Pipe 16 Spring 17 Retaining Plate 18 Cap 19 Air inlet 20 Air inlet 21 Air 22 Injector body 24 Transfer hose 25 Painting gun

Claims (2)

[Claims] Claim: What is claimed is: 1. An injector is connected to a powder coating material supply source, and the compressed material supplied to the injector conveys the powder coating material to a coating gun. A powder coating material conveying device characterized in that air is blown into a connecting inlet pipe. 2. The powder coating material conveying device according to claim 1, wherein a porous pipe is fitted inside the inlet pipe, and air is blown into the inlet pipe through the porous pipe.