JPH0446832Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a spray nozzle for applying adhesives, paints, etc., or spraying a mold release agent to a die-casting mold.

<Prior Art> Conventional spray nozzles of this type have a complicated structure, a large number of parts, and are expensive, and also have the disadvantage that clogging easily occurs inside the nozzle due to the complicated structure.

<Problems to be solved by the invention> The present invention was devised in view of the above-mentioned drawbacks of the conventional technology.It has a simple structure, requires a small number of parts, can be provided at a low cost, and is free from internal clogging. It is an object of the present invention to provide a spray nozzle that is small and lightweight, is small and lightweight, and allows the spray amount to be easily adjusted even in a narrow space, and once the spray amount is adjusted, there is no risk of the spray amount changing during use. .

<Means for solving the problem> The spray nozzle of the present invention that achieves the above purpose has the following features:
A nozzle cylinder equipped with a valve for opening and closing the liquid outlet of the liquid inflow pipe is installed in a nozzle body equipped with a liquid inflow pipe and an air inflow pipe so as to be freely movable in the axial direction in communication with the air passage. The tube is pressed and supported via a pressing spring by an adjustment tube that is screwably attached to the tip opening of the nozzle body, and a stopper is provided protruding from the adjustment tube or the nozzle body to prevent the adjustment tube from screwing. It is characterized by things.

<Example> Hereinafter, an example of implementing the present invention will be described based on the drawings.

The nozzle body 1 is formed of a resin or metal material into a cylindrical shape having a side wall 1a, and has a liquid inflow pipe 3 having a liquid passage 2 and an air inflow pipe 5 having an air passage 4 projecting therefrom.

The liquid inflow pipe 3 may be formed integrally with the nozzle body 1 or may be formed separately and attached to the side wall 1a of the nozzle body 1.
It is formed to protrude along the axial direction at the center position, and the liquid outlet 3'a, that is, the tip 3a of the liquid passage 2 is made to protrude into the nozzle body 1.

Further, the air inflow pipe 5 is formed integrally with the nozzle body 1 or is formed separately so as to protrude from the side wall 1a of the nozzle body 1 or the circumferential wall 1b near the side wall, and the air passage 4 is formed in the nozzle body 1. It communicates internally. This air inlet pipe 5 is not only for supplying air into the nozzle body 1, but can also serve as a mounting leg for supporting the spray nozzle itself.

Inside the nozzle body 1 is a nozzle tube 6 for mixing liquid and air, and a nozzle tube 6 for mixing liquid and air.
An adjusting cylinder 7 and a pressing spring 8 are installed to press and support the cylinder and adjust the spray amount.

The nozzle tube 6 is molded into a cylindrical shape having a flange 6a at one end using a resin or metal material, and has a liquid outlet 3'a of a liquid inlet tube tip 3a protruding into the nozzle body 1 inside. A valve 9 for opening and closing is integrally or integrally formed. Then, the nozzle tube 6 is installed in the nozzle body 1 in communication with the air passage 4 and freely movable in the axial direction, and the tip 3a of the liquid inflow tube 3 is inserted into the nozzle tube 6 to open the valve 9. is brought into contact with the liquid outlet 3'a of the liquid inflow pipe 3 so as to be openable and closable, and is pressed and supported by the adjustment tube 7 via the pressing spring 8.

The adjustment tube 7 is made of resin or metal and is molded into a cylindrical shape with a larger diameter than the nozzle tube 6.A male screw 7a is formed on the outer periphery of the adjustment tube 7, and an adjustment knob 7b is formed on the adjustment knob 7b. A stopper 12 is provided protrudingly to engage with a detent 11 formed on the outer periphery of the nozzle body 1, and its male screw 7a is screwed into the inner periphery of the tip opening 10 of the nozzle body 1 so as to be freely threaded, and the adjustment knob 7b is projected forward beyond the tip opening 10 of the nozzle body 1, and the stopper 12 is engaged with the detent 11 of the nozzle body 1. A pressing spring 8 is inserted between the adjustment cylinder 7 and the flange 6a of the nozzle cylinder 6.
The nozzle cylinder 6 is pressed against the nozzle body 1 so as to be movable in the axial direction. Although not shown in the drawings, it will be easily understood that the adjustment tube 7 may be screwed onto the outer periphery of the tip opening 10 of the nozzle body 1 in a freely threaded manner.

The stopper 12 is for preventing the adjustment cylinder 7 from being inadvertently screwed during use after the adjustment cylinder 7 is screwed to adjust the spray amount.
Adjustment knob 7b or tip opening 1 of nozzle body 1
0. The tip portion 1 is elastically formed to protrude at the outer peripheral position.
2a is engaged with a detent 11 formed on the nozzle body 1 or the adjustment knob 7b. The detent 11 is formed by forming protrusions or grooves at appropriate intervals in the axial direction over the entire circumference of the nozzle body 1 or the adjustment knob 7b.

In use, the liquid inflow pipe 3 and the air inflow pipe 5 of the nozzle body 1 are connected to respective required pipes (not shown), and the liquid introduced from the liquid passage 2 of the liquid inflow pipe 3 is passed through the nozzle tube. Air inflow pipe 5 in 6
The air introduced from the air passage 4 is also atomized and ejected. At this time, the liquid passage 2 is opened and closed by a valve 9 formed in the nozzle cylinder 6. That is, when the nozzle tube 6 moves toward the tip opening 10 of the nozzle body 1 due to the pressure of the air introduced from the air passage 4 against the pressing force of the pressure spring 8, the inside of the nozzle tube 6 is accordingly moved. Since the formed valves 9 move into the same body, the liquid outlet 3'a of the liquid inlet pipe 3 opens and the liquid flows out, and the nozzle tube 6
The air is atomized and injected by air introduced from the air passage 4. Then, when the air is stopped, the valve 9 is pushed back together with the nozzle tube 6 by the pressing force of the pressing spring 8, and the liquid outlet 3'a of the liquid inlet pipe 3 is closed, and the liquid stops flowing.

In addition, the spray amount can be adjusted by rotating the adjustment cylinder 7 to adjust the gap L between the adjustment cylinder 7 and the nozzle cylinder 6, and by adjusting the movable amount (gap L) of the nozzle cylinder 6. 9 and the liquid outlet 3'a of the liquid inlet pipe 3 to finely adjust the amount of spray. Therefore, the valve 9 may be a plate-shaped valve or may be a needle valve as in the illustrated embodiment, and using a needle valve makes it easier to finely adjust the degree of opening with respect to the liquid outlet 3'a. .

<Effects of the invention> Since the spray nozzle of the invention is configured in this way,
The structure is simple and the number of parts is small, and manufacturing and assembly are easy and can be provided at low cost, and the device can be made smaller and lighter.

Moreover, since the spray amount can be adjusted simply by rotating the adjustment tube attached to the opening at the tip of the nozzle body, adjustment can be easily performed even in a narrow space.

Furthermore, since the structure is simple, there is no fear that the inside of the nozzle, that is, the liquid passage, the liquid outlet, and the air passage, will become clogged, and even if they become clogged, they can be easily disassembled and cleaned.

In addition, a stopper is provided on the adjustment tube that adjusts the spray amount or on the nozzle body to prevent the adjustment tube from sliding, so once the spray amount is adjusted, the adjustment tube will not accidentally slide during use. Therefore, there is no possibility that the spray amount will change during use.

Therefore, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, with FIG. 1 being a sectional view and FIG. 2 being a sectional view taken along the line 2--2 in FIG. In the figure, 1 is the nozzle body, 2 is a liquid passage, 3 is a liquid inflow pipe, 3'a is a liquid outlet, 4 is an air passage, 5 is an air inflow pipe, 6 is a nozzle cylinder, 7 is an adjustment cylinder, and 8 is a A pressure spring, 9 a valve, 10 a tip opening, 11 a rotation stopper, and 12 a stopper.

Claims (1)

[Scope of utility model registration request] A nozzle cylinder equipped with a valve for opening and closing a liquid outlet of the liquid inflow pipe is installed in a nozzle body equipped with a liquid inflow pipe and an air inflow pipe so as to be freely movable in the axial direction in communication with the air passage, and the nozzle The tube is pressed and supported via a pressing spring by an adjustment tube that is screwably attached to the tip opening of the nozzle body, and a stopper is provided protruding from the adjustment tube or the nozzle body to prevent the adjustment tube from screwing. A spray nozzle with special features.