JPS60179165A - spray nozzle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Technical field) The present invention relates to a pressurized gas-liquid 131 river type spray nozzle.

(Prior art) As a spray nozzle, this spray nozzle combines the advantages of the ground spray nozzle, which atomizes paint while suctioning it with pressurized air, and the airless spray nozzle, which sprays only paint under pressure and atomizes it.
In front of the orifice-type paint nozzle for spraying, there is a pressurized air-liquid type spray nozzle that is provided with an air nozzle for ejecting fan-shaped air so as to surround the paint nozzle. This type of spray nozzle has a simple structure, and is capable of atomizing paint and preventing scattering.
On the other hand, the fan-shaped spray ejected from the paint nozzle is surrounded by the fan-shaped air flow from the air nozzle.-1-1 The angle of the fan-shaped spray is suppressed to a small value, creating a wide-angle spray. In addition to the problem that it becomes difficult to obtain a coating, if the air pressure supplied to the air nozzle is increased to promote atomization, the shape of the spray becomes disordered, resulting in the inconvenience that a good coating cannot be obtained.

To solve this problem, as shown in Fig. 4, a pair of air nozzles b and b are arranged facing each other on the side of the material nozzle a,
A spray nozzle has been proposed in which the air flow from here collides with the fan-shaped spray ejected from paint nozzle a from the side, but this structure is said to solve the problem of pinching the spray angle. Also, air nozzle b, b
It is difficult to center the air nozzles b, and differences in air flow from each air nozzle b are likely to occur, which may affect the spray and rather disturb the pattern.

(White eye) The present invention was made in view of these problems, and its l-1 objective is to create a structure that does not narrow the spray angle and does not cause disturbances in the spray pattern. The purpose is to provide a pressurized gas-liquid type spray nozzle in a cylinder.

(Structure) Therefore, we will now turn to embodiments illustrating the details of the present invention.
(explain about.

The drawing shows one embodiment of the present invention, and the symbol l in the drawing is a halter of a paint nozzle 2 having a substantially rectangular boss portion 11 protruding from the center of the front surface, and a hole penetrating through the top surface of the paint nozzle 2. A fan-shaped spray orifice-type paint nozzle 2 made of an ultra-hard material is press-fitted into the paint 12 with a lip-shaped groove 21 cut at its tip facing the longitudinal direction of the top surface. A ventilation hole 13 provided in the holder 1 opens into an annular (1n) air groove 14 cut around the boss portion 11, from which relatively low-pressure air flows into an orifice-shaped blowhole 34 (described later).
It is configured to emit more water.

On the other hand, the camp-shaped air nostle 3 that covers the front surface of the halter 1 has a V-shaped or V-shaped notch groove 32 cut into the trapezoidal top surface 31 and a dome-shaped gate cut into the inner surface. An orifice-shaped blowhole 34 is formed by the partition 33, and at the center of both opposing edges of the blowhole 34, there is a shallow rectangular boss 11 provided on the front surface of the holder l. Cut out the notch 35.35 and install the blowhole 34.
Flat air passages a, a are formed at the center of both sides of the mouth so as to sandwich the paint nozzle 2 therebetween. The air nozzle 3 is arranged so that its axis coincides with the Holter 1 shown in ``2'', and the fan-shaped spray from the paint nozzle 2 and the fan-shaped air flow from the air nozzle 3 are ``1iir+1-1''.
By engaging the groove 36 for regulating the position with the pin 26 for regulating the position implanted in the holder l blood donation, Accurately positioned and held.

In the spray nozzle configured in this way, the ventilation hole 23
The relatively low pressure air of about several kg/cm' is sent into the annular air groove 24 to equalize the 1-1I・-J・
It ejects from an orifice-shaped fume n34, or 1. As mentioned above, inside this fume 134, there is a boss part 11 having a rectangular cross section from the plane of the Holter 1 so as to fill this part.
1 on both sides located near the center of the fumarole [34]
In the center of the line, there are narrow flat channels a, a, and at both longitudinal ends of the fume 1-134 away from the center, there are relatively wide wave channels a, b. The air ejected from the center of the mouth edges on both sides becomes a flat, focused strong air current that promotes the fan-shaped spray ejected from the nozzle 2 and suppresses the scattering of mist droplets. The air ejected from both sides becomes a weak air current directed outward, atomizing the paint, but rather guiding it in the direction of widening the sector angle, and the fan-shaped spray thus obtained reaches the end onto the surface to be painted. Forms a wide rl coating film whose film thickness gradually decreases as the temperature increases.

(Effect) υAs mentioned above, according to the present invention, the support part of the paint nozzle is formed as a protrusion with a flat cross section along the jet. The shallow notch corresponding to the shape has been reduced, so despite the cylinder configuration, the airflow that sandwiches the fan-shaped spray from both sides is flattened and strengthened at the same time, promoting atomization and preventing the scattering of mist droplets. In addition, the airflow can be directed outward and weakly on both sides of the fan-shaped spray, and wide-angle spray without turbulence can be realized.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a spray nozzle according to an embodiment of the present invention, FIG. 2 is a front view of the same device, and FIG. 3 is an A of FIG.
- A cross-sectional view taken along line A, and FIG. 4 is a side view showing one side of the conventional device. 1...Holter 11...Boss part 2...Filling point 1 Nosle 3...Air nozzle 32...Notch groove 33...
・1・-Mum-shaped portal 34...Fume 1" 35...
P no missing applicant: Honda Motor Co., Ltd. Nigyo Co., Ltd. (and 2 others) - Agent: Patent attorney Yoshitaka Nishikawa 1 Figure 4

Claims (1)

[Claims] In front of the nozzle-shaped orifice-type paint nozzle for spraying, there is a ring-shaped orifice-type spray formed by communicating the dome-shaped four parts on the inner surface with the notch grooves on the outer surface. The air nozzles are arranged so that the jets from the two nozzles are formed on substantially the same plane, and the support part of the spray nozzle surrounded by the four dome-shaped parts is arranged so that the jets from the two nozzles are formed on the same plane. L] Form a protrusion with a flat cross-section along the longitudinal direction and a shallow notch 17 at the center of the edge 1-1 on both sides of the jet 11, which is similar to the cross-sectional shape of the protrusion 1-. A spray nozzle made by cutting.