JP2601757B2 - Aerosol spraying method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for applying an aerosol to an object to be treated with an antistatic agent, a rust inhibitor, a surface modifier such as an emulsion of a polymer compound, or other appropriate coating liquid, The present invention relates to a method of spraying an aerosol and a device therefor in a method of removing static electricity by spraying a charged object to be processed into an aerosol or cleaning a surface of the object.

[0002]

2. Description of the Related Art There is a method of applying an appropriate coating liquid such as a surface modifier to an object to be processed in the form of an aerosol. Further, for example, there is a method of removing static electricity by forming pure water into an aerosol and spraying the charged object to be processed as shown in JP-A-2-203976.

[0003]

In order to speed up these processes, a large amount of aerosol needs to be quickly attached to an object to be processed. However, when the spray pressure of the aerosol is increased and the spray speed of the aerosol is increased, a phenomenon of two-layer flow occurs, and the aerosol is repelled by the air layer (thickness of about 0.3 mm) on the surface of the processing object, and the aerosol is processed. Can not adhere to the surface of This air layer must be destroyed, but in order to do so, turbulence must be created. To create this turbulent flow, the aerosol spray air pressure must be about 3-8 kg / cm ² .

However, when the aerosol is generated and ejected at such a high pressure, the particles of the aerosol become unstable due to agglomeration and bonding of the particles. Therefore, uniform fine particles cannot be attached to the object. Therefore, it is difficult to destroy the air layer.

Accordingly, the present invention provides a method for removing static electricity by using an aerosol of pure water or an antistatic agent or a cleaning method using an aerosol of the above-mentioned aerosol to stably produce uniform particles even if the particle size of the aerosol is reduced. SUMMARY OF THE INVENTION It is an object of the present invention to provide an aerosol spraying method and a device which can quickly and surely adhere.

[0006]

According to a first aspect of the present invention, in a coating method in which a coating solution is sprayed into an aerosol on an object to be processed, a spray pressure of the aerosol is applied separately from the aerosol from the inside of the aerosol spray opening. It blows out a gas having a pressure more than twice as high as that of air, carbon dioxide gas, inert gas and the like. This coating liquid is, for example, a solution of a surface modifier such as an antistatic agent, a rust inhibitor, an antifogging agent, a surface hardener, a surface reflection control agent, a solution of a surface cleaning agent, a surface stain adhesion inhibitor, a surface smoothing agent. , A solution such as a surface anti-slip agent, and other appropriate solutions. Furthermore, the aerosol has a size of about 0.01 μ to about 100 μ,
These can be easily transferred to a distant place by blowing air. According to a second aspect of the present invention, the coating solution is a solution of an antistatic agent.

According to a third aspect of the present invention, there is provided a method for removing static electricity in which pure water or a solution of an antistatic agent is sprayed into an aerosol and sprayed on an object to be processed. This is to blow out a high-pressure gas such as air at a pressure higher than twice the blowing pressure.

The invention according to claim 4 relates to an apparatus used in these methods, wherein a transfer pipe for transferring an aerosol such as water or a coating liquid at an appropriate pressure is provided, and a hollow pipe is provided at one end of the transfer pipe. Aerosol spray body connected
A small-diameter opening is formed by narrowing the opening of the spray body to a small diameter, and an ejection pipe having an ejection port for ejecting a high-pressure gas having a pressure higher than the spray pressure of the aerosol is provided in the spray body. It is provided facing the small-diameter opening of the spray body.

According to a fifth aspect of the present invention, there is provided a coating method or a cleaning method in which water or a coating solution is aerosolized and sprayed on a processing object such as a granule, a powder or a small molded product. Aerosol spraying at the same time as blowing the aerosol into the transfer pipe by blowing a gas having a pressure higher than twice the pressure of the aerosol separately from the aerosol into the transfer pipe, and attaching the aerosol to the workpiece. And the law.

[0010]

According to the first aspect of the present invention, a gas having a spray pressure higher than twice the spray pressure of the aerosol is ejected from a part of the inside of the aerosol spray port together with the spray of the aerosol, and vigorously entrains the aerosol. Hits the surface of the object. And when this high-pressure gas hits the surface of the object, it creates a turbulent flow at that pressure and blows off the air layer on the surface of the object, which causes the two-layer flow phenomenon.
The aerosol can be easily attached to the surface of the processing object by the suction force of the turbulent flow. Needless to say, dust and dust adhering to the surface of the processing object are also blown off. Then, a part of the aerosol is attracted to the decompression layer near the outer surface of the high-pressure gas layer, where it is in a standby state, and the aerosol adheres to the surface of the workpiece one after another.

The aerosol adhered to the surface of the object to be treated is vaporized by the high-pressure gas blown one after another, and a coating film is formed on the surface of the object to be treated. At this time, the formation of the coating film is promoted by the pressure of the high-pressure gas. That is, the higher the pressure of the high-pressure gas, the more the vaporization of the attached aerosol is promoted, and the higher the film forming effect.

In the method according to the second aspect, the aerosol adheres and the water is vaporized to form a coating film composed of an antistatic agent in the same manner as the above method. Therefore, the surface of the workpiece has an antistatic effect.

[0013] According to the third aspect of the present invention, the first aspect is provided.
In the same manner as in the invention described in the above item, the gas whose spray pressure is more than twice as high as the spray pressure of the aerosol destroys the air layer that causes the two-layer flow phenomenon on the surface of the work, and the aerosol adheres to the surface of the work. However, in this static elimination method, when the aerosol is sprayed, some particles are charged in the air, and each of these particles has a positive or negative charge. The higher the purity of the water that forms the aerosol, the higher the dielectric constant, the greater the polarization charge, which promotes the electrical neutralization effect, and the lower the electrical conductivity. As a result, the positive and negative charging properties increase and stabilize. These partially charged aerosols are vigorously ejected together with the high-pressure gas, collide with and adhere to the surface of the object to be processed, and evaporate due to the temperature of the object and the high-pressure gas. In particular, when the object to be processed is higher than room temperature, it works effectively, and evaporation and vaporization are promoted. At this time, the charge generated on the surface of the object to be processed and the charge on the opposite electrode of the aerosol are neutralized and erased.

According to the fourth aspect of the present invention, the aerosol is transferred at an appropriate pressure through the transfer pipe and sent into the spray body, and the aerosol is sprayed at a constant pressure from the small-diameter opening of the spray body. At that time, a high-pressure gas having a pressure higher than the spray pressure of the aerosol is ejected from the ejection port of the ejection pipe, so that the aerosol is caught in the high-pressure gas and ejects from the small-diameter opening of the atomizer together with the high-pressure gas. The high-pressure gas causes turbulence and destroys the air layer on the surface of the object.

Further, according to the invention of claim 5, the granules, powder,
An object to be processed, such as a small molded product, is transferred by a gas having a blowing pressure that is at least twice as high as the aerosol blowing pressure blown from one side to the other in the transfer pipe. At the time of this transfer, the aerosol sprayed into the transfer pipe is entrained in the high-pressure gas and adheres to the object to be processed, and at the same time, the high-pressure gas blows off dust and dirt on the surface of the object to be processed. Clean the object surface.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

First, a first embodiment of a spraying apparatus used in the present invention will be described with reference to FIGS. 1 and 2. A transfer pipe 1 for transferring an aerosol such as water or a coating liquid at an appropriate pressure is provided. A hollow aerosol spray 2 is connected to one end of a pipe 1, the opening of the spray 2 is once narrowed to a small diameter, and a small-diameter opening 3 is further opened outward. Further, an ejection pipe 5 having an ejection port 4 for ejecting high-pressure air having a pressure higher than the spray pressure of the aerosol is provided in the spray body 2, and the ejection port 4 faces the small-diameter opening 3 of the spray body 2. It is provided. And the jet pipe 5
Is connected to one end of a high-pressure air pipe 6 introduced from the outside through the side wall of the transfer pipe 1.

Next, the spraying method using the apparatus of the present invention will be described. The solution of the antistatic agent is converted into an aerosol by a separate aerosol generator. The particle size of this aerosol is about 1
These aerosols are transferred at an appropriate pressure in the transfer pipe 1 and sent into the spray 2, and the spray 2
Aerosol from the small diameter opening 3 at a constant pressure, for example, 2K
sprayed at g / cm ² . At this time, high-pressure air having a pressure higher than the spray pressure of the aerosol, 4 to 10 kg / cm ^2, is jetted from the jet port 4 of the jet pipe 5. Due to the ejection of the high-pressure air, a negative-pressure portion is generated around the high-pressure air at the three small-diameter openings, and the aerosol is sucked into the negative-pressure portion to increase the speed, and together with the high-pressure air, the small-diameter opening 3 of the spray 2 is formed. Erupts from

The aerosol impinges on the surface of the workpiece 7 while being involved. When the high-pressure air hits the surface of the object 7, the pressure causes a turbulent flow to blow off the air layer on the surface of the object 7, and the suction force of the turbulence allows the aerosol to be easily removed from the surface of the object 7. Can be adhered to. Needless to say, dust and dust adhering to the surface of the processing object 7 are also blown off at that time. Then, a part of the aerosol is attracted to the decompression layer near the outer surface of the high-pressure air layer, where it is in a standby state, and the aerosol adheres to the surface of the processing object 7 one after another. At that time, FIG.
As shown in (2), a suction device 8 with a filter may be provided on both sides or around the application surface of the object 7 to suction the dust and dust blown off by the high-pressure air so as not to pollute the surroundings. .

FIG. 3 shows a second embodiment of the apparatus. In the apparatus of the first embodiment, the ejection pipe 5 is provided at the back of the spray body 2 away from the small-diameter opening 3, and the spray body is provided. 2
A high-pressure air is jetted out of the inside, and the aerosol can be entrained in the high-pressure air and sprayed in the same manner as described above.

FIGS. 4 to 6 show a third embodiment of the device according to the present invention.
In this embodiment, a handy type sprayer is shown, one end of a horizontally long spray body 9 is connected to one end of an aerosol transfer pipe 10, and the other end of the spray body 9 is closed. A small-diameter opening 11 is provided on the upper surface, and one end of a high-pressure air pipe 12 along the outer periphery of the spray main body 9 is connected to a spray pipe 13 provided beside the small-diameter opening 11. An appropriate number of ejection ports 14 are provided on the outer periphery of the spray pipe 13 facing the part 11, and a handle 15 is further provided from the lower part of the spray main body 9.

Also in the case of the third embodiment, a solution of the antistatic agent is converted into an aerosol by a separate aerosol generator, which is transferred by an aerosol transfer pipe 10, and the aerosol is introduced into the spray body 9. Constant pressure from the opening 11,
For example, it is sprayed at ² kg / cm ² . Then, through a high pressure air pipe 12, high pressure air from a jet port 14 of a jet pipe 13,
A jet of 4 to 10 Kg / cm ² is emitted. As a result, the aerosol can be entrained in high-pressure air and sprayed in the same manner as in the above embodiment. Therefore, the operator uses the handle 15 to direct the small-diameter opening 11 and the ejection port 14 toward the surface of the object to be processed, and sprays the aerosol together with the high-pressure air.

FIGS. 7 to 11 show an application example using the apparatus and method of the present invention. The first application example in FIG. 7 is one side of a plastic film 21 extruded from a plastic film extruder 20. Is provided with an aerosol spraying device 22 of the present invention, and sprays an aerosol composed of an antistatic agent together with high-pressure air from the aerosol spraying device 22. This is, of course, plastic film 21
An aerosol spray device 22 may be provided on the other side to spray. In addition, near these aerosol spray devices 22,
A suction device 23 for sucking dust and dust blown off by high-pressure air may be provided.

The second application example shown in FIG. 8 is used for molding a product such as plastic with a pressing die.
In order to remove the peeling charge when the mold and the female mold 25 are separated from each other, a molded product 26 is formed between the male mold 24 and the female mold 25 when the mold is released.
An aerosol consisting of an antistatic agent or pure water is sprayed together with high-pressure air from an aerosol spraying device (not shown) of the present invention. As a result, the aerosol adheres to the surface of the molded product 26 and is instantaneously discharged.

The third application example shown in FIG. 9 is directed from a gate type spraying device 28 provided on a conveyor belt 27 to a molded article, a packaged article 29 and the like 29 on the conveyor belt 27 together with high-pressure air and an antistatic agent or a pure antistatic agent. An aerosol made of water is sprayed to remove electricity from the molded article, packaged article 29 and the like. In this case, an appropriate suction device (not shown) can be provided beside the spray device 28 to suction and remove the fine particles such as dust that has been discharged.

The fourth application example shown in FIG. 10 is a hollow box type spraying device 30 in which a person to be processed or work clothes is put, and high-pressure air is sprayed through a number of openings provided in the hollow inner wall. At the same time, an aerosol composed of an antistatic agent or pure water is sprayed to eliminate static electricity.

FIG. 11 shows a fifth application example of the present invention for transferring an object to be processed such as a small molded product, a granular material, a powder, etc., in a transfer pipe by using a high-pressure gas blown from one side to the other side. The way you use it. That is, an object to be processed, such as granules, powders, and small molded products, is put into the transfer pipe 32 from the hopper 31, and high-pressure air is blown into the transfer pipe 32 by a blower 33 or the like to transfer the object to be processed by the high-pressure air. At this time, the water or the coating liquid is aerosolized by the aerosol generator 34 and sprayed into the transfer pipe 32. Then, the aerosol sprayed into the transfer pipe 32 is caught in the high-pressure air and adheres to the object to be processed, and at the same time, blows off dust and dirt on the surface of the object to be processed by the high-pressure air,
The surface of the object to be processed is cleaned, and the surface of the object to be processed, such as the above-mentioned small molded articles, granules, and powders, is cleaned, static electricity is removed, or an appropriate application liquid is applied to the surface of the object to be processed. A cyclone (separator) 35 is provided at one end of the transfer pipe 32 to separate dust and dust from the object to be processed.

In the above embodiment, the spray pressure of the aerosol was set to 2 kg / cm ² and the ejection pressure of the high-pressure air was set to 4 to 1
Although the pressure was set to 0 kg / cm ² , these pressures are not limited to these, and the ejection pressure of the high-pressure air may be higher than the spray pressure of the aerosol. When the high-pressure air is used as an inert gas, the high-pressure air is ejected from a cylinder.
Kg in some cases.

In the above embodiment, high-pressure air is used. However, the present invention is not limited to this, and any suitable high-pressure gas such as an inert gas may be used.
The above embodiment shows a case where the present invention is used for static elimination,
The aerosol was composed of an antistatic agent solution or pure water, but when the present invention is used for the coating method, the antistatic agent, a rust inhibitor, a surface modifier such as an antifogging agent and other appropriate coating solutions are used. Including the following.

[0030]

According to the first aspect of the present invention, since the blowing pressure of the high-pressure gas is twice or more the blowing pressure of the aerosol, the particles of the aerosol are reliably and very stably transferred to the object to be processed. it can. That is, when the high-pressure gas blows out from the inside of the aerosol spray port, the high-pressure gas hits the surface of the object to be processed while entraining the aerosol. The air layer, which is the source of the two-layer flow on the surface, is blown off, and the aerosol can be easily and stably transferred to the surface of the object to be treated and adhered by the suction force of the turbulent flow. Therefore, even if the aerosol is a fine particle, it is surely adhered to the object to be processed at a high speed.

Further, in the attached aerosol, a solvent such as water contained therein is instantaneously vaporized by the high-pressure gas ejected to the surface of the object to be processed, and an extremely thin film is formed on the object to be processed very quickly and reliably. Needless to say, dust and dust adhering to the surface of the processing object are also blown off at that time, and the coating film is formed after the surface of the processing object is cleaned.

According to the second aspect of the present invention, similarly to the above, the aerosol composed of fine particles adheres to the surface of the object to be treated, and the solvent is instantaneously vaporized by spraying the high-pressure gas onto the portion, whereby the film of the antistatic agent is formed. Formed quickly.

According to a third aspect of the present invention, as in the first aspect, there is provided a method of removing or cleaning an antistatic agent solution or pure water by spraying the solution onto an object to be treated or pure water. Even if the particle size of the aerosol is reduced, the pressure of the gas is more than twice as high as the spray pressure of the aerosol, and the aerosol stably hits the surface of the object to be processed while entraining the aerosol, so that the aerosol is stable, and the aerosol can be quickly and reliably. The static electricity on the surface of the object is removed by adhering to the object. In addition, the solvent is vaporized by spraying the high-pressure gas onto the portion, thereby cleaning the surface of the object.

According to the fourth aspect of the present invention, even if the aerosol particles are fine particles in the above-mentioned application of the appropriate solution or static electricity removal, they can be stably sprayed on the surface of the object to be processed, and the aerosol can be quickly and reliably obtained. Is a device capable of adhering to the object to be processed and cleaning the surface of the object to be processed.

Further, according to the invention of claim 5, a small molded product,
While transferring the objects to be processed such as granules and powders, the surface of these objects to be processed can be electrostatically removed, cleaned or applied with an appropriate coating solution reliably and very stably, resulting in extremely labor saving or It can speed up.

[Brief description of the drawings]

FIG. 1 is a sectional plan view of an apparatus used in a method according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view showing a use state of an apparatus used in the method according to the first embodiment of the present invention.

FIG. 3 is a partial sectional side view showing a use state of an apparatus used in a method according to a second embodiment of the present invention.

FIG. 4 is a partial sectional front view of an apparatus used in a method according to a third embodiment of the present invention.

FIG. 5 is a side view of an apparatus used in the method according to the third embodiment of the present invention.

FIG. 6 is a partial cross-sectional plan view of an apparatus used in a method according to a third embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a first application example using the apparatus and method of the present invention.

FIG. 8 is an explanatory diagram showing a second application example using the apparatus and method of the present invention.

FIG. 9 is an explanatory diagram showing a third application example using the apparatus and method of the present invention.

FIG. 10 is an explanatory diagram showing a fourth application example using the apparatus and method of the present invention.

FIG. 11 is an explanatory diagram showing a fifth application example using the method of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 transfer pipe 2 spray body 3 small-diameter opening 4 ejection port 5 ejection pipe 6 high-pressure air pipe 7 workpiece 8 spray body 9 aerosol transfer pipe 10 small-diameter opening 11 high-pressure air pipe 12 ejection pipe 13 ejection port

Claims (5)

(57) [Claims] In a coating method in which a coating liquid is sprayed onto an object to be processed in the form of an aerosol, a gas having a pressure at least twice as high as the spray pressure of the aerosol is blown from the inside of the aerosol spraying port separately from the aerosol. An aerosol spraying method characterized by spraying the aerosol on a processed material. 2. The aerosol spraying method according to claim 1, wherein the coating liquid comprises a solution of an antistatic agent. 3. A method for removing static electricity by spraying a solution of an antistatic agent or pure water into an aerosol and spraying the same on an object to be processed, wherein the spray pressure of the aerosol is at least twice as high as the aerosol separately from the aerosol from the inside of the aerosol spray opening. An aerosol spraying method characterized by blowing out a gas at a pressure and spraying the aerosol on an object to be processed. 4. A transfer pipe for transferring an aerosol such as water or a coating liquid at an appropriate pressure is provided, a hollow aerosol spray is connected to one end of the transfer pipe, and the opening of the spray is reduced in diameter. A squeezed small-diameter opening is provided, and an ejection pipe having an ejection port for ejecting a high-pressure gas having a pressure higher than the spray pressure of the aerosol is provided in the spray body. The ejection port faces the small-diameter opening of the spray body. An aerosol spray device characterized by being provided as: 5. An aerosol of water or a coating liquid, and granules.
In a coating method or a cleaning method of spraying an object to be processed such as a powder or a small molded product, an aerosol is sprayed into a transfer pipe of the object to be processed, and at the same time, a pressure that is at least twice as high as the spray pressure of the aerosol separately from the aerosol. Aerosol spraying method, wherein the gas is blown into a transfer pipe to transfer the object to be processed and the aerosol is attached to the object to be processed.