JPS58124564A - Atomizer - Google Patents

Abstract

PURPOSE:To efficiently mix and atomize the base agent and a curing agent at the same time, by opening or closing needle valves to adjust the spray amounts of liquids, while contriving the pulverization and mixing of the liquids with a member for guiding the sprayed liquids. CONSTITUTION:After the spray amounts of pressurized liquids Q1, Q2, a period for starting ejection and the spray amount of air are adjusted, a trigger 26 is pulled backwards to move a piston 28 for opening the passage of high-pressure air. Consequently, the high-pressure air flows, and needle valves 10, 12 move backwards to open nozzles 2, 4. Hence, the pressurized liquids Q1, Q2 and the high-pressure air are sprayed. Since the outflow direction of the pressurized liquid Q2 is controllled by a member 46 for guiding the sprayed liquid, both of the liquids Q1 and Q2 are collided with each other and dispersed, pulverized and mixed as fine particles. When the curing agent and the base agent are introduced as the pressurized liquids Q1 and Q2, respectively, the mixing of the two liquids can be performed at a stage just before application so that the curing caused by previous mixing can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spraying device that independently jets a plurality of liquids from a plurality of nozzles, atomizes them, and mixes and disperses them.

Conventionally, methods and devices have been widely known and used in which only one liquid is ejected from a nozzle at the tip and atomized and dispersed by a jet stream of compressed high-pressure air, such as the nozzle/nozzle device used as an air spray gun for painting. Been ℃・ru.

However, there is no simple and inexpensive method or device for mixing and dispersing multiple liquids after atomizing them. The use of two-component paints has been promoted,
Achieving lower temperature and shorter paint drying times.

In other words, since the base agent and curing agent can be mixed before painting, it is possible to prevent curing during the pre-painting stage due to pre-mixing. I can do it.

As a result, we achieved energy savings by saving the fuel required to heat the drying air, and also simplified the equipment by shortening the painting process.

Cost reductions can be achieved by improving work efficiency.

In addition, in the case of two-component paints, the amount of solvent used can be reduced by 15 to 20 C% compared to deep paints, and as a result,
It becomes possible to reduce the amount of nohydrocarbons, which cause photochemical smog, released from the solvent, making it possible to achieve low-pollution coating. Furthermore.

By spraying a mixture of two or more colors of paint, the object of the present invention is to provide a spraying device that has the above-mentioned advantages that could not be obtained by the conventional spraying devices described above.
In other words, the object of the present invention is to provide an atomization mixing and spraying device for a plurality of liquids.

The spray 1-1/l device according to the present invention has been ingeniously designed in view of the above-mentioned points, and includes a high-pressure gas passage connected to a gas jetting nozzle and provided with a valve, and a needle connected to a plurality of liquid jetting nozzles, each communicating with a plurality of liquid jetting nozzles. A plurality of liquid nozzle holes to which valves are attached, a plurality of types of liquid can be ejected independently from the liquid ejection nozzle, and the twenty-one dollar nozzle is arranged in the axial direction of the nozzle hole with respect to the nozzle hole. The present invention is characterized by being provided with an opening/closing operation means for displacing the liquid to open and close the liquid jetting nozzle, and a jetting liquid guide member for colliding and dispersing a plurality of liquids jetted from the liquid jetting nozzle with each other and atomizing and mixing them into spray. It is a spray device.

According to the above configuration, by sliding the needle valve with respect to the nozzle hole using the opening/closing operation means, the gap between the liquid jetting nozzles can be adjusted, and the jetting height of the liquid can be adjusted. Furthermore, by completely closing the needle valve and blocking the nozzle, it is possible to stop the ejection of the liquid and at the same time prevent the nozzle from clogging due to the intrusion of dry adhering foreign matter in the nozzle or the surrounding liquid. Further, since the ejected liquid guide member is provided in front of the fluid ejecting nozzle, the plurality of liquids ejected from the plurality of liquid ejecting nozzles can collide and disperse with each other, and can be atomized and mixed and sprayed.

Below, nine embodiments of the present invention will be questioned in detail based on the accompanying drawings. FIGS. 1 and 2 show a first embodiment of the present invention, which is particularly suitable for a two-component type coating spraying device comprising a base agent and a curing agent.

Reference numerals 2 and 4 are nozzles for ejecting two types of pressurized liquids QI and Q2, and are communicated with nozzle holes 6 and 8, respectively. Similar tapers are formed in the nozzle holes 6 and 8 so that the tips of the needle valves 10 and 12 come into contact with each other. Further, an outer ring member 14.16 is screwed to the rear part of the needle valve 10.12, and as shown in Figure 9, the outer ring member 14.16 is connected to adjustment screws 18, 20 provided at the rear of the spray device body. Springs 22 and 24 are respectively mounted between the rear end faces of the springs 22 and 24, respectively. By adjusting the adjusting screws 18, 20, the strength of the biasing force of the springs 22, 24 can be adjusted. Further, the front end surfaces of the outer ring members 14 and 16 are in contact with the inner wall of the trigger 26, and when the trigger 26 is pulled by hand.

Outer ring member 14. Through i6, the needle valve 1 10.12 is pulled in one direction in the figure to open the nozzle 2 and 4 at the same time. In addition, liquid Q+.

The JO pressure for Q2 may be set at an appropriate pressure using the liquid supply source, for example, at about 2 atmospheres.

Further, a piston 28 that opens and closes a high-pressure air passage is in contact with the inner wall of the trigger 26, and when the trigger 26 is pulled, the passage is opened, and when the force of the trigger 26 is removed, the passage is closed. It is configured.

Further, high pressure air is introduced from the air inlet 60.

The liquid passes through the air passage 32, passes through the air reservoir 34, and is ejected from the ejection holes 36, 38, 40 onto the area where the liquid was injected. Reference numeral 42 denotes a valve provided in the air passage 32, and the opening degree of the valve 42 is adjusted by an air amount adjustment screw 44. That is, the atomized equilibrated mixed dispersion flow ejected from nozzles 2 and 4 is atomized by ejecting compressed gas A from around this dispersion flow by a well-known method (for example, air camp 45 in the case of a spray gun for painting). Mixing can be further promoted and the scattering direction and scattering pattern can be controlled. As is well known, the air cap 45 has a large number of air jet holes 36, 38. The high-pressure gas A compressed by actuating the piston 28 with the trigger 26 is delivered to the main body 47.
The above-mentioned blowout hole 36 passes through the air passage 32 and air reservoir 34.
It is ejected from 38.40°.

4 and 6 are ejected liquid guide members installed in front of the nozzle 4, and are arranged so that the outflow direction of the pressurized liquid X1 collides with the ejected direction of the liquid Q+ from the nozzle 2, as shown in FIG. Thus, the taper angle α of the nozzle 2 is configured to be smaller than the taper β of the ejection hole of the ejected liquid guide member.

Further, the injection amount and opening timing of the pressurized liquids QI and Qz are adjusted by the outer ring member 14, 16 and the needle valve 1o.

12 can be appropriately adjusted by adjusting the relative positions of the screws 52 and 54. In this embodiment, as shown in the second sectional view.

The inflow holes 56, 58 of Q and Q2 are configured to change at right angles to the axial direction of the nozzle holes 6, 8. In addition, 48
．． 50 is a sealing member.

According to the above configuration, the outer ring member 52 warps 54 are adjusted to adjust the injection amount and injection start timing of the pressurized liquids Q1 and Q2,
Furthermore, after adjusting the amount of ejected air with the air amount adjustment screw 44, pull the trigger 26 backward.

The piston 28, which opens the high-pressure air passage, moves to allow high-pressure air to flow, and the needle valves 10 and 12 move rearward, opening the nozzles 2 and 4. and,
The pressurized liquids Ql, Q2 and the high pressure air are ejected, and the outflow direction of the pressurized liquid Q2 is regulated by the ejected liquid guide member 46, so that the pressurized liquid Q1. Q
2 can be dispersed by collision with each other, and the particles can be atomized and mixed.

Also, by removing the force of the trigger 26.

The high-pressure air passage is blocked, and the tip of the needle valve 10 and flange 12 closes the nozzles 2 and 4.

This can stop the ejection of liquid and at the same time prevent clogging of the nozzle due to dry adhesion of liquid near the nozzle or intrusion of foreign matter.

In the above embodiment, the curing agent flows into the spray device as a pressurized liquid QI, and the base agent flows as a pressurized flow Q2.

When used in a two-component paint system that uses two components, a base agent and a curing agent, it is possible to reduce the temperature of paint drying.
Since the base agent and the curing agent can be mixed before coating, it is possible to prevent curing during the pre-painting stage due to pre-mixing, thereby making it possible to use a paint that cures at extremely low temperatures and in a short time.

As a result, energy savings are achieved by saving the fuel required to heat the drying air, and correspondingly, costs are reduced by simplifying the equipment by shortening the painting process and improving work efficiency. In addition, - compared to the original paint, the amount of solvent used can be reduced in the case of two-component paint, and as a result, it is possible to reduce the amount of hydrocarbon released from the solvent, which causes photochemical smog. Low-pollution painting becomes possible. Furthermore, by spraying a mixture of paints of two or more colors, coatings of two different mixed colors can be easily obtained.

Furthermore, as a method of applying a two-component paint, substantially the same effect as in the above embodiment can be obtained even if the pressurized liquid Q+ is stopped and the main agent is introduced, and the curing agent is introduced as the pressurized liquid Q2. .

Next, a second embodiment will be described based on FIG. 3.

For parts that are substantially the same as those in the first embodiment, two drawings are omitted, or the same parts are marked and detailed explanations are omitted.

Needle valve 10. Through holes 60 and 62 are formed in the central axes of the air reservoirs 34 and 12, respectively.
The through holes 60 and 62 are defined by the holes 68, 70, 72 and 74 provided in the main body 47 and the seal members 64, 66, respectively, just before the needle valves 10 and 12 close the nozzles 2 and 4 and in the closed state. It is configured to communicate.

According to the above configuration, immediately before the needle valves 10 and 12 close the nozzles 2 and 4, high pressure air is supplied to the through hole 6.
Since the liquid near the nozzle is ejected outside, the needle valve can be opened and closed smoothly.

Note that the two through holes 60.62 and the air reservoir 34 may be configured to be in constant communication regardless of the relative positions of the needle valve 10.12 and the nozzle holes 6, 8.

It is possible to obtain substantially the same effects as in the above embodiment.

In the first and second embodiments described above, the case of atomization mixing and dispersion of two types of liquids was shown, but by providing separate nozzle holes with the same structure, three or more types of liquids can be atomized and mixed and dispersed. Of course it is possible.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing one embodiment of the present invention, and FIG.
FIG. 3 is an enlarged sectional view of a main part showing another embodiment of the present invention. 2.4...Liquid jet nozzle. 6.8... Nozzle hole. 10.12... Needle pulp. 22.24...Spring, 26...Trigger. 62...High pressure gas passage. 36.38.40... Gas jet nozzle.

Claims (1)

[Scope of Claims] A high-pressure gas passage through which a valve is provided, a plurality of fluid nozzle holes each communicating with a plurality of liquid jetting nozzles and having a needle valve attached thereto, and a plurality of types of liquids being connected to the liquid jetting nozzle. opening/closing means for opening and closing the liquid ejection nozzle by displacing the needle valve in the axial direction of the nozzle hole with respect to the nozzle hole; A spraying device characterized by being provided with an ejected liquid guide member that collides and disperses the liquid with each other and atomizes and mixes the spray. (3) A spray device according to claim 1, characterized in that the needle valve is provided with a spring means having a biasing force in the direction of the nozzle. (3) A needle provided in the liquid ejection nozzle hole. A through hole is drilled along the central axis of the valve, and the high pressure gas flows into the through hole, and the air flow is ejected from the center of the needle toward the nozzle, causing liquid particles to adhere to the tip of the nozzle. The spray device according to claim 1, characterized in that the above-mentioned problems are prevented.