JPS5844948Y2 - Painter air bleed device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for discharging air mixed in flux in a welding rod coating machine.

Conventionally, in painting extruders that apply flux to welding rods, air tends to remain when refilling the container with the muddy substance extruded by the painting piston, and this residual air is compressed by the piston, resulting in an explosion when it is discharged. This method has disadvantages such as causing problems, making work difficult, and making it difficult to apply the coating uniformly.

For this reason, there is a method of deaerating the flux using a vacuum kneading machine, but not only does this make the equipment larger, but additional air may be mixed in when extruding the flux, so it cannot be said to be a complete solution. .

This idea was made in view of the above-mentioned drawbacks,
This invention has a core wire introduction nipple that guides the core wire through the muddy substance to the tip die. Either provide a polygonal or separate continuous groove on the inner surface of the nipple so as to create a continuous gap, or make the diameter slightly larger than the outer diameter of the core wire to form a gap and guide the air in the flux through the gap. In addition, an ultrasonic vibrator is placed outside the tip of the nipple to ensure a smooth flow of air and prevent it from entering the gap.

Furthermore, the effect of this invention can be further enhanced by forming a groove communicating with the gap on the outer surface of the tip of the nipple to improve the efficiency of introducing air into the gap.

The embodiments shown in the drawings will now be described in detail.

The overall configuration of the illustrated welding rod coating machine is almost the same as the conventional one, with a cylinder 2 constituting a container 1 and a die block 3.
．． The die holders 4 are connected in sequence, and a die is attached to the horizontal tip of a flux filling path 6 that curves in an L shape and extends from the upper part of the piston head 5 of the cylinder 2 drilled in the die block 3 and the die holder 4. It is fixed to the die holder 4 with an adjusting bolt 9 via a die case 8 having a diameter of 7 mm.

A nipple 10 is attached to the die block 3 by being held on the rear wall 3a, and extends through the rear wall 3a and into the flux filling path b, and extends to the vicinity of the die 7. A twisted core wire 11 is inserted, passed through the hollow part of the nipple 10, inserted through the tip opening 10b in the flux filling path 6, and passed through the tie tube. By suppressing the flux 12, the gap between the core wire 11 and the die 70 is utilized to uniformly apply the flux 12 to the outer periphery of the core wire 11.

The nipple 10 has 9 holes on its inner peripheral surface as shown in FIG.
Grooves 10C are continuously carved in the longitudinal direction from the tip to the rear end at every 0 degrees, so that a gap 13 is formed between the core wire 11 inserted into the nipple 10 and the groove 10C.

Further, the outer peripheral surface of the tip opening 10b of the nipple 10 is a conical surface 10d inclined toward the tip, and the conical surface 10d
Grooves 10e are carved at 90 degree intervals at positions facing the grooves 10C, so as to communicate with the grooves 10C.

Incidentally, the inner surface of the nipple 10 may have a triangular or quadrangular cross section to form a gap 13 between it and the core wire 11, as shown in FIGS. 5a and 5b.

Further, on the outer periphery of the tip opening 10b of the nipple 10, a doughnut-shaped ultrasonic transducer 14 is arranged so as to surround it at a constant interval, and a cone portion 15v die protruding from one end of the cut transducer 14 is arranged. Taper adapter 1 to holder 4
The vibrator 14 is held by fixing the vibrator 14 through the vibrator 6.

An ultrasonic generator 17 is connected to the cone portion 15, which causes the vibrator 14 to generate ultrasonic vibrations to generate a flux 1.
2 increases the fluidity of the flux, and the air in the flux is forced into the voids 13.
It is effective in letting people escape.

In the figure, 18 is a known air bleed device provided in the piston head 5.

In the above-described device, the air 20 remaining in the flux 12 is compressed by the pressure of the piston 5 and when it comes near the die 7, it becomes easy to flow due to the vibration of the vibrator 14, and the air 20 remains on the outer peripheral surface of the tip of the nipple 10. and the inner circumferential surface of the vibrator 14, and collects in the groove 10e on the outer circumferential surface of the nipple.

The air flows from the groove 10e to the gap 13 on the inner peripheral surface of the nipple 10.
It passes through and is discharged from the external opening 10a of the nipple 10.

As is clear from the above explanation, according to this invention, since a gap is provided between the inner surface of the nipple and the material to be coated, air can be almost completely vented through the gap. Since it has an extremely simple configuration, it can be provided easily and at low cost, and is of practical value.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of this invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a side view of the tip of the nipple, and Fig. 4 is an arrow A in Fig. 3. The perspective view and FIGS. 5A and 5B are cross-sectional views showing a modification of the inner surface of the nipple. 1... Container, 3... Gui block, 4... Dice holder, 5... Piston head, 10... Nipple (10c, 1
0e... groove), 11... core wire, 12...
...Flux 14...Ultrasonic vibrator.

Claims (1)

[Scope of Claim for Utility Model Registration] CI) In a coating machine that applies flux to the outer periphery of a welding rod core wire by extruding it with a piston, the inner surface of the core wire introduction nipple that guides the core wire to the dust at the tip of the coating machine. A continuous gap is formed between the nipple tip and the core wire from the tip to the rear end, and a donut-shaped ultrasonic vibrator is arranged near the nipple tip to surround the nipple and the core wire. This is an air bleed device for paint sprayers with unique features. (2) A request for registration of a utility model in which the nipple has a sharply inclined tip and grooves are carved on the inclined surface, so that the ridges and grooves communicate with the gaps formed on the inner surface of the nipple. An air bleed device for a paint sprayer according to item 1.