JPS61470A - Liquid atomization apparatus - Google Patents

Abstract

PURPOSE:To inject an ideal spray solution, by such a simple mechanism that compressed air and a release agent solution are injected from all jet pipes in a perfectly mixed state. CONSTITUTION:An atomizing nozzle 34 is provided to one side of an atomizing chamber 33 having Venturi 32 in a freely slidable manner and a valve mechanism 38 is closed when the atomizing nozzle 34 is separated from the Venturi 32 to prevent a release agent solution from flowing into a nozzle orifice 37 while, when the atomizing nozzle 34 is close to the Venturi 32, the valve mechanism 38 is opened to allow the release agent solution to flow into the nozzle orifice 37. When the atomizing nozzle 34 is close to the Venturi 32, the air passage becomes narrow. Therefore, the release agent solution is entirely and uniformly atomized and effectively sprayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a liquid atomizing device for spraying a mold release agent liquid or the like onto a mold of a die-casting machine or the like.

[Prior art]

Spray guns were generally used to spray release agents, etc. onto the molds of die-casting machines, etc., but in recent years, die-casting products have become larger, their shapes more complex, and the number of pieces has increased. Automation of spraying is required. For this reason, automatic spray devices equipped with a large number of spray guns are used, but as is well known, there is not enough space to install the spray guns, so it is difficult to ideally mount a large number of spray guns. For this reason, a liquid atomization device has been developed in which air and a release agent liquid are pressurized into a cavity in a spray head, mixed, and then blown out from a number of vibrators.

An example of a conventional liquid atomization device will be described with reference to FIG. In the drawing of a spray head 12 having an atomization chamber 11 inside, two holes 13 and 14 are bored at the upper part.
is connected to a pressure air source 16 via an air on-off valve 15,
The hole 14 is connected to a release agent liquid tank 18 via a switching valve 17 . A branch chamber 1 is located below the spray head 12.
7 A lid 20 covering the branching chamber 19 is easily attached to and detached from the system spray head 12 by screws (not shown), and a large number of injection pipes 21 are attached to the lid 20. .

With this structure, when the air on-off valve 15 is opened and the switching valve 17 is switched, the pressurized air and mold release agent liquid are forced into the atomization chamber 11, mixed, and then injected from the injection pipe 20 through the branch chamber 19. Ru. However, in this conventional device, the pressurized air and the release agent liquid are simply forced into the atomization chamber 11, so the mixture of the pressurized air and the release agent liquid is uneven and the atomization is incomplete. Depending on the position of the injection pipe 21, the mold release agent liquid may not be atomized but may be sprayed in a sloppy manner, or conversely, if only air is injected, it may be impossible to ideally apply the mold release agent liquid.

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The present invention eliminates such drawbacks and its purpose is to
Although it is a simple mechanism, the liquid atomization device uses all the injection tube force to completely mix the pressurized air and the mold release agent liquid and spray the ideal spray liquid.A venturi is placed in the middle. an atomizing chamber having an atomizing chamber, an atomizing nozzle which is provided inside the spray head and is slidable relative to the venturi and which connects or disconnects the nozzle at the tip with the valve mechanism U to the mold release agent liquid tank by this sliding; A switching valve that selectively allows pressurized air to flow into the compartment of the cylinder into which the spray nozzle is inserted and moves it, a branch chamber formed on one side of the spray head, a lid that covers the branch chamber, and a lid attached to the lid. It is characterized by consisting of multiple injection tubes.

[Embodiment j of the invention The present invention will be explained below with reference to FIG. 2 showing an embodiment. Note that the same members as those in FIG. 1 are given the same reference numerals, detailed explanations are omitted, and only the different parts will be explained. The spray head 31 has an atomization chamber 33 with a venturi 32 in the middle.
A hole 42 on one side of the atomization chamber 33 is connected to a pressure air source 16 via an air on-off valve 15. An atomizing nozzle 34 facing the venturi 32 is slidable on the spray head 31, and a piston 35 on one side thereof is inserted into a cylinder 36 provided on the spray head 31, which is formed on the left side in the figure. The tubular nozzle 37 is connected to a valve mechanism 38 with a hole perpendicular to the axis, and the compartment of the cylinder 36 separated by the piston 35 is connected to a switching valve 39.
is connected to a source of pressurized air 16 via. In addition, the hole 42 of the spray head 31 and the left chamber of the cylinder 36 are connected to the switching valve 3.
A hole 41 provided in the middle of the hole 40 connected to the hole 9 is directly connected to the mold release agent liquid tank 18.

Next, the operation of the embodiment described above will be explained with reference also to FIG. In the state shown in FIG. 2, the air on-off valve 15 is closed, so pressurized air does not flow into the atomization chamber 33, and the mold release agent liquid is also closed by the atomization nozzle 34, so it does not flow into the atomization chamber 33. However, when the protrusion on-off valve 15 (r) is switched to open, only pressurized air is injected from the injection pipe 21.

In this state, the pressurized air is not resisted by a portion of the venturi and is vigorously ejected from the injection pipe 21, thereby effectively cleaning the mold before spraying the mold release agent.

When the switching valve 39 is further excited, pressurized air flows into the right chamber of the cylinder 36, so that the atomizing nozzle 34 moves to the left as shown in FIG. As a result, since the valve mechanism 38 is connected face-to-face to the hole 41 connected to the mold release agent liquid tank 18, the mold release agent liquid is supplied from the hole 41 through the valve mechanism 38 and the nozzle 37 to the tip of the atomizing nozzle 34. be done. At this time, the tip of the atomizing nozzle 34 is located near the venturi 32 and the air passage of the venturi 32 is narrowed, so the air flow rate here becomes extremely high and is supplied to the tip of the atomizing nozzle 34. The mold release agent liquid is effectively atomized and flows into the atomization chamber 33.
flows into. The pressurized air and the release agent liquid that have flowed into the atomization chamber 33 are stirred and mixed there, and are uniformly injected from each injection pipe 21 through the branch chamber 19 (see FIG. 2).

Now, in many molds used in actual industry, the required amount of mold release agent applied during continuous casting operations is not uniform depending on the part of the mold. When using the atomizing device of the present invention in such a mold, a plurality of (two or more) injection pipes 21 are directed toward the part that requires a large amount of mold release agent to be applied. This purpose can be achieved by mounting them as close together as possible. Figure 4 shows an example of this.
Reference numeral 1 denotes a mold, and the injection pipe 52 is made of a flexible material so as to be bendable. On the other hand, if a small amount of mold release agent liquid is applied to a larger area, as shown in FIG. good.

The total coating amount can be adjusted by adjusting the switching time of the switching valve 39 or by providing a flow control valve (not shown) between the release agent liquid tank 16 and the hole 41.

[Effect of the invention j As explained above, the liquid atomization device of the present invention has the following advantages.
An atomizing nozzle from which the mold release agent liquid flows out from the nozzle at the tip is slidably provided on one side of the atomizing chamber having a venturi, and when the atomizing nozzle is away from the venturi, the valve mechanism closes and the mold release agent flows out. The liquid was prevented from flowing into the nozzle, and when the atomizing nozzle was close to the venturi, the valve mechanism was opened to allow the release agent liquid to flow into the nozzle. When the atomizing nozzle is close to the venturi, the air passage of the venturi is narrowed by the atomizing nozzle, so the air flowing there becomes high speed and finely atomizes the release agent liquid.

Therefore, the release agent liquid ejected from each injection pipe from the atomization chamber through the branch chamber is uniformly atomized and effectively sprayed onto the mold. It should be noted that if the injection pipe is made of a flexible material, there is an advantage that it becomes possible to spray a large amount of the mold release agent liquid in a concentrated manner to the areas that require it.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional example, Fig. 2 is a sectional view of an embodiment of the present invention, Fig. 3 is a partial sectional view for explaining the operation, and Fig. 4 is a sectional view of another embodiment of the invention. FIG. 18... Pressure air source, 19... Branch chamber, 20... Lid, 21. 25... Injection pipe, 31... Spray head, 32... Venturi, 33... Atomization chamber, 34 Medium fog conversion nozzle, 35... piston, 36... cylinder, 37...
- Nozzle, 38...Valve mechanism, 39...Switching valve.

Claims (1)

[Scope of Claims] An atomization chamber provided inside the spray head and having a bench lily in the middle thereof, and an atomization chamber provided inside the spray head so as to be slidable relative to the bench lily, and by this sliding, a valve at the tip of the atomization chamber is provided. Switching that selectively allows pressurized air from a pressurized air source to flow into both chambers of an atomizing nozzle that is connected to or disconnected from a release agent liquid tank via a mechanism, and a cylinder that inserts and moves the atomizing nozzle. A liquefaction atomization device comprising a valve, a branch chamber formed on one side of the spray head, a lid covering the branch chamber, and a plurality of injection pipes attached to the lid. 2) The liquid atomization device according to claim 1, wherein the injection pipe is made of a flexible material.