JP2000312848A - Powder paint transport and supply equipment - Google Patents

Abstract

(57) [Summary] (Problem corrected) [Problem] Even if the total length of a hose connecting a coating gun and a powder coating tank becomes long, a powder coating from a powder coating tank by an injector does not occur without a breathing phenomenon. Powder paint transport and supply device that can keep the amount of drawing out constant. SOLUTION: An injector for extracting powder paint from a powder paint tank 3 and sending the paint to a coating gun 5 is provided with a suction port 1.
5 is connected to the powder paint tank, the tank-side injector 11 sucks the powder paint from the powder paint tank and sends it out together with the compressed air from the discharge port 16, and the suction port 25 is connected to the discharge port 16 of the tank-side injector. Then, the powder paint discharged from the tank side injector 11 is sucked and divided into the relay injector 21 which is sent out from the discharge port 26 together with the compressed air.
5 was provided with an air inlet 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder paint transporting / supplying device which sucks powder paint from a powder paint tank and sends it to a coating gun.

[0002]

2. Description of the Related Art Conventionally, an injector has been used when a powder paint in a powder paint tank is delivered to a coating gun.

[0003] As shown in FIG.
When the compressed air A is introduced into the main body 7 from the nozzle 2, the suction force generated in the main body 7 sucks the powder coating from the powder coating tank 3 and discharges the powder coating together with the compressed air. The outlet 4 of the injector 1 and the coating gun 5 are usually connected by a hose 6. In addition, the sub air B is also introduced into the main body 7.

[0004]

By the way, if the length of the hose 6 connecting the injector 1 and the coating gun 5 is long,
Since the air resistance (pressure loss) in the hose 6 increases, a so-called breathing phenomenon occurs in the coating gun 5 or the discharge amount decreases, so that stable powder coating cannot be performed.

For this reason, conventionally, the length of the hose 6 connecting the injector 1 and the coating gun 5 is set so as not to be too long.
The paint tank 3 is installed near the periphery of the paint gun 5.

However, if the paint tank 3 is installed near the periphery of the paint gun 5, there is no more space around the paint booth, so special care must be taken to prevent workers from contacting the reciprocator that moves up and down. Becomes

In view of the above, the present invention provides a powder coating material in which a paint tank is installed at a position distant from a coating booth so that the discharge amount does not decrease and the coating gun does not breathe even if the hose is long. It is intended to provide a transport supply device.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, an injector for extracting powder paint from a powder paint tank and sending the powder paint to a coating gun has a suction port connected to the powder paint tank. A tank-side injector that sucks powder paint from the powder paint tank and sends it out together with compressed air from a discharge port, and a powder paint that is connected to the discharge port of the tank-side injector and discharged from the tank-side injector And a relay injector that sends out the compressed air from the discharge port together with the compressed air, and an air inlet is provided at the suction port of the relay injector.

[0009] With the above configuration, the air amount of the tank-side injector required for drawing out from the powder coating tank can be kept constant, and the air amount corresponding to the length of the hose can be supplied by the relay injector.

[0010] Thus, a certain amount of powder paint can be pulled out from the powder paint tank by the tank-side injector, and a certain amount of powder paint can be discharged from the coating gun by the relay injector without breathing.

Since the air inlet is provided at the suction port of the relay injector, if the air amount and the air pressure of the nozzle of the relay injector are increased, the air flows from the air inlet. There is no effect on the suction amount of the tank side injector. Therefore, by changing the air amount and air pressure of the nozzle of the relay injector, the mixing ratio of the powder paint and the air discharged from the coating gun can be appropriately adjusted.

[0012]

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

As shown in FIG. 1, the apparatus for transporting and supplying powder paint according to the present invention includes an injector for drawing powder paint from a powder paint tank 3 and sending it to a coating gun 5.
Tank-side injector 11 and relay injector 21
The tank-side injector 11 and the relay injector 21 are connected by a hose 13.

The tank-side injector 11 has a nozzle 14 for ejecting compressed air A into a main body 12. The main body 12 has a suction port 15 to which a suction force of the compressed air A ejected from the nozzle 14 acts. And a discharge port 16 for discharging the powder paint sucked from the suction port 15 together with the compressed air A spouted from the nozzle 14. The suction port 15 of the tank-side injector 11 is
Is connected via a drawer pipe 17.

The relay injector 21 includes a main body 22
Having a nozzle 24 for ejecting compressed air A therein,
In addition, there are a suction port 25 to which the suction force of the compressed air A ejected from the nozzle 24 acts, and an ejection port 26 for discharging the powder paint sucked from the suction port 25 together with the compressed air A ejected from the nozzle 24. Is provided. The discharge port 26 and the coating gun 5 are connected by the hose 6.

The suction port 25 of the relay injector 21
Is provided with an air inlet 27. As shown in FIG. 2, the amount of air flowing from the air inlet 27 is detected by a wind pressure sensor 28 installed at the inlet 27, and the converter 29 according to the amount of air flowing from the air inlet 27. By controlling the electropneumatic valve 30 and adjusting the amount of air ejected from the nozzle 24, the amount of air transported from the outlet 26 of the relay injector to the coating gun 5 can be changed as appropriate. Further, the dehumidified and deoiled air of the compressor may be forced to flow in from the inflow port 27 of the relay injector 21 by the differential pressure of the suction port 25.

Next, FIG. 3 shows that a plurality of tank-side injectors 11 are provided for one powder paint tank 3, and the discharge ports 16 of the plurality of tank-side injectors 11 are
This is an example in which a suction port 25 of one common relay injector 21 is connected via a hose 13. As described above, by installing a plurality of tank-side injectors 11 and changing the discharge amount of each tank-side injector 11 in various ways, it is possible to variously select the discharge amount of the powder paint by switching the plurality of tank-side injectors 11. it can.

FIG. 4 shows one or more tank-side injectors 11 installed in each of the plurality of powder coating tanks 3, and each of the discharge ports 1 of these tank-side injectors 11.
6 is the suction port 2 of one common relay injector 21
5 is an example in which the hose 5 is connected via a hose 13. According to this example, a powder paint tank 3 containing a new powder and a powder paint tank 3 containing a recovered powder are prepared, and only a new powder, only a recovered powder, or a new powder is recovered depending on an object to be coated. The powder can be mixed and discharged from the coating gun 5. Further, powder paints of different colors, for example, powder paints of three primary colors are stored in each powder paint tank 3, each color is drawn out by the tank side injector 11, mixed in the relay injector 21, and It is also possible to discharge. In this case, the new powder and the recovered powder or the mixed powder of the powder coatings of each color is sufficiently mixed in the relay injector 21 and discharged from the coating gun 5.

[0019]

As described above, according to the present invention, the paint tank is installed at a position distant from the painting booth, and even if the total length of the hose is long, the discharge amount is reduced, and the painting gun breathes. Does not occur, so that stable powder coating can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing one example of a powder coating material transport and supply device according to the present invention.

FIG. 2 is a schematic view of a relay injector part.

FIG. 3 is a schematic view showing another example of the present invention.

FIG. 4 is a schematic view showing another example of the present invention.

FIG. 5 is a schematic diagram of a conventional example.

[Explanation of symbols]

 Reference Signs List 3 powder paint tank 5 coating gun 6 hose 11 tank side injector 12 main body 13 hose 14 nozzle 15 suction port 16 discharge port 17 drawer pipe 21 relay injector 22 main body 24 nozzle 25 suction port 26 discharge port 27 inflow port 28 air pressure sensor 29 conversion Container 30 Electro-pneumatic valve A Compressed air

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D073 AA01 CA06 CA11 4F033 QA01 QB02Y QB05 QB12Y QB18 QF07Y QF15Y QF23 QH03

Claims (6)

[Claims] 1. An injector for drawing powder paint from a powder paint tank and sending the powder paint to a coating gun, a suction port connected to the powder paint tank, sucking the powder paint from the powder paint tank, and compressing the powder paint together with compressed air. Separated into a tank-side injector that sends out from the discharge port, and a relay injector that has a suction port connected to the discharge port of the tank-side injector, sucks powder paint discharged from the tank-side injector, and sends out the compressed paint from the discharge port together with the compressed air. An apparatus for transporting and supplying a powder coating material, wherein an air inlet is provided at a suction port of the relay injector. 2. A plurality of tank-side injectors are provided for one powder coating tank, and each discharge port of the plurality of tank-side injectors is connected to a suction port of one common relay injector. The transporting / supplying device for powder coating according to claim 1. 3. A plurality of powder paint tanks each having one or more tank-side injectors installed, and each of the discharge ports of these tank-side injectors is connected to the suction port of one common relay injector. The transporting / supplying device for powder coating according to claim 1. 4. The forced air flows into an air inlet provided at a suction port of the relay injector.
Item 3. The transporting / supplying apparatus for powder coating according to any one of Items 3. 5. The coating injector according to claim 1, wherein said relay injector is installed at or around a coating gun body.
Item 5. A transporting / supplying apparatus for powder coating according to any one of Items 4 to 4. 6. A sensor for detecting an inflow amount of air is provided at an air inlet provided at a suction port of the relay injector, and air discharged from a nozzle of the relay injector is detected based on the inflow amount of air detected by the sensor. The transportation and supply device of a powder coating material according to any one of claims 1 to 5, wherein the amount is adjusted.