JPH01104364A - Flame spray device - Google Patents

Abstract

PURPOSE:To increase a spraying effect through prevention of an accident such as shortcircuiting by providing a wire drive device on a flame spray gun, and also an air hole in a wire nozzle and screw blades around the nozzle. CONSTITUTION:In a flame spray device for coating on various kinds of metal and ceramics used in connection with construction work, a wire drive motor 2 is provided on a flame spray gun 1, and also a gear for positive side 4 and a gear for negative side 5 are installed on a motor shaft 3 as a wire feeder device. In addition, a plurality of air holes 9 are provided on a head of a wire nozzle 8, and screw blades 11 are mounted on an air injection part of the wire nozzle 8. Under this design, an accident such as shortcircuiting due to the bending or slack of wire is prevented and the feed of wire is smoothed. Further, a cooling effect is increased because of a direct air intake in the nozzle part.

Description

[Detailed Description of the Invention] [Industrial Application Fields] ■Internal and external rust prevention and exterior of tanks, ■Thermal spray coating of guide rails, bridges, etc., ■Inner leakage prevention and magnetic wave prevention of resin molded products,
■Repair processing of corroded parts of automobiles, ■Inner surface processing of switchboards, ■Time in chemical equipment, ■Time protection in steel pipes, ■inch rear processing, ■locations where anticorrosive plating is not applied in industrial machinery, ■food machinery and equipment, 0 Communication towers, antennas, exterior painting of ships, seawater desalination equipment, prevention of armpit rot,
0 Construction-related and other various metals, ceramics, etc.

[Conventional technology]

Conventional electric arc spraying uses (→(→) current to flow (4
) wire and (→ wire) are brought into contact with each other to cause snot to form and turn into particles, which are then coated on the base material.

[Zhao point that the invention is trying to solve]

However, significant problems have arisen in the assembly of the feeder, air source, and other equipment and in the functioning of the machine. Conventional electric arc spraying machines use air as the driving device for feeding the metal wire, which uses an air screw to introduce a worm gear and a gear, and then connects two spur gears for wire feeding. He makes money by using it as a feeder.

Air amount of 8.5 kg 7 am” Jil is required.

■The metal wire is focused on one point to create a spark, but once the metal is covered with snow, it becomes particulate, but if there is less air source blown onto the base material, the particulates become small beads. Therefore, the air discharge condition is a major factor. However, since the air is discharged from the rear with only one outlet, it is released in the form of particles, but since the metal wire melts at a temperature of about 2,500 to 3,000 degrees Celsius when sparking, the air source When the particles are discharged at these points, the particles do not cool down and the temperature does not drop, but instead they become heated particles and are fused to the base material.

The temperature at that time is about 120°C to 150°C.

Since the particles fused to the base material are coated on the base material at high temperatures, they expand and contract, causing distortion in the coated base material and causing the coating to peel off from the base material. Furthermore, since the metal is thermally sprayed at high temperatures, a large amount of toxic vapor is generated from the metal, which also oxidizes, resulting in an unavoidable decrease in the adhesion rate of the base material.

■Because two holes (■ and e) are made in one object along the path for the wire, the wire gets caught at the bend in the middle, and the sliding becomes poor, so there is no need to cut it at the feed gear. The metal wire bends and contact between ■ and e causes the wire to break, often causing interruptions.

■The wire feed gear also uses an air source to rotate the 9-ohm gear, but due to fluctuations in air pressure, the wire does not feed properly on average, and when the sparked metal is welded to the base material, a certain amount of welding cannot be achieved. do not have.

■Since it is functionally complex, there are many problems such as gear wear and unstable rotation.

[Means to solve the problem]

Therefore, in the present invention, a wire drive device is provided in the thermal spray gun body, an air discharge port is provided in the nozzle head, and an impeller blade is provided between the nozzle head and the nozzle head screw cap.

[Effect]

In the present invention, since the thermal spraying gun body itself is provided with a wire feeding device for the metal wire, there is no need to prevent short circuits and other accidents due to bending or sagging of the metal wire, and the feeding of the metal wire is extremely smooth. In addition, air holes 9 are provided in the nozzle head to draw air directly into the nozzle, which significantly enhances the cooling effect, and thereby prevents the nozzle outlet from becoming a vacuum and prevents cavities from forming in the air flow. death.

The effect of spraying on the base material is increased, while at the same time preventing heat damage during spraying, and by providing scree blades around the nozzle to rotate the air around the nozzle so that it can be ejected, further increasing the effect. There is.

〔Example〕

Further, the present invention will be described with reference to an example of implementation shown in the drawings. One thermal spray gun is provided with a wire drive motor 2, and a motor shaft 3 of the motor 2 is equipped with a two-piece set of a positive gear 4 and a negative gear 5. A wire feeding device is constructed by providing a gear, a positive terminal electrode 6 and a negative terminal electrode 7, and a wire nozzle 8 is installed on the terminal at an angle so that the positive and negative terminals come into contact with each other. However, the head of the wire nozzle 8 has a hole 9 of 0.8φ.
are provided at a plurality of locations, and the pores 9 are provided at an angle of 24° to 28°. The distance between the wire nozzle 8 and the wire nozzle cover 10 is about 1-1 on the circumference. Further, in order to improve air discharge efficiency, screw blades 11 are provided to create a circular force. In the figure, reference numeral 12 is an air subtraction fitting, 13 is a wire nozzle head screw lid, 14, 15 is a bearing, 16 is a bearing, 17 is a pin, 18 is a gear wheel composed of an insulator, 19 is an insulating plate, 20 is the motor mounting bracket,
21 is a wire insertion fitting, 22 is a positive side metal wire,
23 is a negative side metal wire, 24 is an insulating chain such as thiamin that covers the metal wire, 25 is an air pipe,
26 is a power supply plus, 27 and 28 are wire drums, 2
9 and 30 are the connection cords for the positive and negative sides, 31
is the power cord of the motor 2, and 32 is its power plug.

〔Effect of the invention〕

As mentioned above, the present invention has a wire feeding device for the metal wire in the thermal spraying gun body itself, which prevents short circuits and other accidents caused by bending or sagging of the metal wire. The air flow is extremely smooth, and air holes 9 are provided in the nozzle head to draw air directly into the nozzle, which significantly enhances the cooling effect and prevents the nozzle outlet from becoming a vacuum. This prevents cavities, increases the effectiveness of spraying onto the base material, and at the same time prevents heat damage during spraying.In addition, a screw blade is provided on the nozzle shaft to rotate the air to the nozzle shaft so that it can be ejected. In order to increase the effect, the particles ejected when the metal wire sparks are made to be much finer particles.In addition, according to experiments, metal wire particles at a temperature of 2500°C to 3000°C are sometimes sprayed onto the base material at temperatures as high as 15°C to 20°C when the metal wire sparks. Decrease, plastics, paper.

A drive motor for an upper wire feeding device that can produce extremely remarkable effects and effects, such as being able to coat base materials such as cloth, etc.
It has many and extremely remarkable effects, such as the unit can also be used as a handle for a thermal spray gun.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an explanatory diagram showing a partially sectional view of the thermal spray gun body, and FIG. 2 is an explanatory diagram of the state of use. 1... Thermal spray gun, 2... Wire drive motor,
3... Motor shaft, 4... Glass gear, 5...
Negative gear, 6...Positive terminal electrode, 7
... Negative terminal electrode, 8... Wire nozzle. 9... Pore, 10... Wire nozzle cover, 11
...Screw blade, 12...Air subtraction fitting.

Claims (1)

[Claims] 1. A thermal spraying machine characterized in that a wire driving device is provided on the thermal spraying gun body. 2. Claim 1, characterized in that the thermal spray gun body is provided with a wire drive device, and the wire nozzle is provided with air holes.
Thermal spraying machine described in section. 3. The thermal spraying machine according to claim 1 or 2, characterized in that a screw blade is provided in the air blowing part of the wire nozzle. 4. The thermal spraying machine according to any one of claims 1 to 3, characterized in that the motor body of the motor of the wire drive device is used as a handle of the thermal spraying machine.