JPS5818152B2 - RIKEI ZAINO ATOMIZER - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold release agent atomizer J for supplying atomized mold release agent to the inner surface of a mold installed in a die casting machine. The purpose of the present invention is to provide a structure in which a discharge nozzle for a liquid mold release agent opens automatically in conjunction with this, and furthermore, the atomization efficiency is high.

In conventional atomizers, it is not possible to control the liquid using air pressure, and therefore it is difficult to maintain the ratio of liquid and air within a desired range, and it is also difficult to control the timing of the start and stop of ejection of air and liquid. This required a lot of effort and a complicated valve mechanism, which led to the problem of increasing the size of the device.

The present invention makes it possible to control the amount of liquid discharged by air pressure, and also allows the air to be ejected in advance of the liquid when spraying starts, and shuts off the air later than the liquid when spraying is stopped.
Moreover, by automating such operations near the nozzle, the above-mentioned conventional problems can be avoided. Liquid discharge nozzle 5 inside and main body 1
An external air passage connecting the pressurized air source and the mixing chamber 10 is connected to an external pressurized air source, and an air volume control valve is provided in the external air passage connecting the pressurized air source and the mixing chamber 10. The discharge nozzle 5 is connected to a release agent liquid supply source outside the main body 1, and the air passage connecting the pressurized air source and the mixing chamber 10 is connected to the servo cylinder 2 for opening the valve via a branch air passage 26 inside the main body 1.
The valve 6 is connected to the pressurized air chamber 25 of No. 2 so that the opening degree of the valve increases in response to an increase in the pressure of the air chamber 25, and the valve 6 is opened and separated following the introduction of pressurized air into the mixing chamber 10. The mold agent is sucked into the mixing chamber 10 from the liquid discharge nozzle 5 and mixed with air, and will be explained in conjunction with the drawings as follows.

゛Atomizer (atomization device) according to the present invention
In Figure 1, which shows a longitudinal cross-sectional view of the
, 2 is a spray nozzle screwed into the screw hole at the tip of the main body 1, 3 and 4 are air supply and liquid supply pipe joints screwed into the screw holes on the main body 1, respectively, and 5 is a liquid discharge nozzle. ,6
is a needle valve, and 7 is a cap.

The spray nozzle 2 has a mixing chamber 10 inside the spout 9 at the tip.
The cylinder 11 is positioned on the main body 1 by a nut 12.

The liquid discharge nozzle 5 is screwed into a screw hole in the main body 1, and a seal ring 13 maintains airtightness between the pressurized air chamber 14 and the liquid chamber 15.

5a is an end face perpendicular to the axis of the cylinder 11.

The cylindrical part on the left half of the nozzle 5 is the cylinder 11
It is inserted concentrically by a certain amount into the cylinder 11, and forms an air passage 16 with an annular cross section between it and the cylinder 11.

An annular counterbore is provided at the right end of the hole 17 in the nozzle 5, into which an O-ring 18 is fitted, and furthermore, a needle 19 at the left end of the needle valve 6 is fitted into the O-ring 18. and closes the hole 17.

The needle valve 6 is integrally equipped with a small-diameter piston 20 and a large-diameter piston 21, and both pistons 20 and 21 are connected to a small-diameter cylinder and a large-diameter cylinder 22 (
The large-diameter cylinder 22 and the large-diameter piston '21 form a pressurized air chamber '25.

26 is room 14. 27 is a compression spring.

The pipe joint 3 communicates with a pressure storage tank 30 maintained at a constant pressure of M via a pipe 28 and an on-off valve 29, and by fitting a horizontally opening υ type clamp fitting 30 in the middle and screwing a nut 32. , '-rto' = the iser support stand 33 and the pipe joint 3 are integrated.

The other pipe joint 4 communicates with a mold release agent tank 35 through a pipe 34.

In addition, 36 at the bottom of the main body is a U-shaped tank plate h to prevent the cap 7 from being removed, 3r't, and a bolt for tightening, and the right end foot of 36 is the groove 3 provided around the cap 7. '8, and the bolt 37 passes through a slot 39 (FIG. 1A) on the play +36.

FIG. 2 shows a partial side view of a die casting machine equipped with an atto-iser according to the present invention; 41 is a fixed die, 42 is a fixed die, 43 is a movable die, 44 is a movable die, 45 is an injection plunger, 46 is a stand having a ball joint.

Both molds 42 and 44 are opened as shown in Figure 2, and the product is ready.

After the mold release agent is taken out, two atomizers spray a predetermined amount of mold release agent onto the inner surface of the mold on opposing sides.

That is, in FIG. 1, when the on-off valve 29 is opened, the pressurized air in the pressure storage tank 30 is supplied to the blade pressure air chamber 14 through the pipe 28 and the pipe joint 3, and from there to the air passage 16 having an annular cross section. The liquid enters the mixing chamber 10 and expands under reduced pressure, causing a violent vortex on the end surface 5a of the liquid discharge nozzle 5.

At the same time, a part of the air in the pressurized air chamber 14 passes through the passage 26 and reaches the pressurized air chamber 25, acting on the large diameter piston 21 and moving the needle valve 6 to the right against the elasticity of the spring 27. The needle part 19 is buoyant from the air pressure ring 18 by an amount corresponding to the air pressure at that time.

When the O-ring 18 opens, the mold release agent filling the liquid chamber 15 is sucked into the mixing chamber 10 through the hole 17, is drawn into the aforementioned vortex air, becomes atomized, and becomes atomized into atomized particles. spout 9
erupts from.

When the opening degree of the on-off valve 29 is increased, air flows from the air passage 16 to the mixing chamber 1.
At the same time as the amount of air ejected into the 0 increases, the needled part 19
The amount of lift is also increased, and therefore the amount of liquid sent to the mixing chamber 10 through the holes 17 is also increased.

Conversely, when the opening degree of the valve 29 is reduced, both the pressurized air and the liquid supplied to the mixing chamber 10 are reduced, and in this way the weight ratio of air to liquid is maintained constant.

To stop spraying, simply close the on-off valve 29.

Then, the pressure in the pressurized air chamber 25 is reduced, and the elasticity of the spring 27 causes the l'' portion 19 to sit on the O-ring 18, and after the liquid is shut off, the air also stops coming out.

The present invention can be embodied as described above, and according to the present invention, by adjusting the on-off valve 29, the amount of spray can be freely adjusted without changing the quality of the spray.

Further, since only one valve 29 is operated at that time, the spray amount adjustment operation is simple.

Supply and cut-off operations are also simple because both the limb and air can be automatically supplied or cut off by simply opening and closing one valve 20.

Furthermore, it is possible to prevent air from being squirted out wastefully during supply or cutoff operations, and to prevent liquid from flowing in front of or behind the liquid, and because only one valve 29 is required for injection control, the structure can be simplified. It can be simplified and manufacturing can be facilitated.

Since the valve 29 is provided in the external air passage, the valve 29
can be installed in a position where it can be easily operated away from the mold 42 and the like.

Furthermore, since the liquid can be shut off near the spray nozzle 2, waste caused by dripping of the liquid can also be prevented in this respect.

Furthermore, even if liquid leaks from the valve 6 in the shut-off state, the leaked liquid can be stored in the mixing chamber 10.
It is possible to reliably prevent liquid from leaking out of the nozzle 2.

Since the spray nozzle 2 is provided with the mixing chamber 10 and the spout 9, the direction of the spray can be easily determined.

Further, in the illustrated embodiment, since the end face 5a is provided at the tip of the liquid discharge nozzle 5 at a right angle to the axis of the cylinder 11, the air ejected from the air passage 16 around the end face expands rapidly and generates a vortex and becomes turbulent. This has the advantage of involving the liquid supplied from the liquid discharge nozzle 5 and quickly atomizing it.

In addition, when the illustrated clamp fitting 3t is attached to the pipe joint 3,
The mounting bracket that was conventionally provided on the main body 1 can be omitted, and the metal fitting 31 conveniently serves as a universal joint when changing the attitude of the main body 1.

Adopting the lock plate 36 not only prevents the cap 7 from coming off, but also allows the elongated hole 39 to restrict the movable range of the cap 7, which has the advantage of making it easier to adjust the mixing ratio.

FIG. 3 shows a modified example of the spray nozzle. According to the structure shown in FIG. 3, the length of the nozzle 9 has been greatly increased.
It is possible to give directionality to the spray, increasing the reach (to around 1 m, for example), and is effective when it is difficult to bring the nozzle close to the mold.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an atomizer according to the present invention, FIG.
2 is a partial side view of a die-casting machine equipped with an atomizer according to the present invention, and FIG. 3 is a longitudinal sectional view showing a modification of the spray nozzle. 1...Main body, 2...Spray nozzle,
6...Needle valve, 10...Mixing chamber, 26...Air passage (branch passage), 29...
...Opening/closing valve (example of air volume control valve), 30...
- Pressure accumulator tank (example of pressurized air source), 35...mold release agent tank (example of liquid supply source).

Claims (1)

[Claims] 1 A mixing chamber 10 connected to the jet nozzle 9 is provided in the spray nozzle 2 at the tip of the main body, and the liquid discharge nozzle 5 in the main body 1 is connected to the pressurized air source outside the main body 1, and the pressurized air source is connected to the mixing chamber 10. An external air passage connecting the air source and the mixing chamber 10 includes an air volume control valve 6, which is normally biased in the closing direction and whose opening degree can be adjusted.
Connect the liquid discharge nozzle 5 to a release agent liquid supply source outside the main body 1 through is connected to the pressurized air chamber 25 of the servo cylinder 22 for opening the valve,
The valve opening degree is increased in response to the increase in pressure in the air chamber 25, and a force is applied to the mixing chamber 10. Atomizer 8 for a mold release agent, characterized in that it is inhaled into a mold release agent and mixed with air.