JP2932243B2 - Cavitation nozzle for spraying dry powder and coating method using the nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle for producing a swirling air cavitation swirling in one direction and a nozzle for producing a swirling air cavitation swirling in the other direction in a dry powder spraying apparatus for processing a spacer for a liquid crystal substrate. The present invention relates to a cavitation nozzle for spraying dry powder, and a method of applying a dry powder using the nozzle, and more specifically, a first nozzle that generates a first swirling air cavitation,
The present invention relates to a cavitation nozzle for dry spraying, in which a second nozzle for generating a second swirling air cavitation swirling in a direction opposite to the first swirling air cavitation is provided, and to a method of applying a dry powder using the nozzle.

[0002]

2. Description of the Related Art Conventionally, a dry powder spraying nozzle of this type is extruded while stirring a certain amount of dry powder into a dry powder mixing chamber in which an air introduction nozzle and an air discharge nozzle are inserted, and is appropriately adjusted by an air introduction nozzle. In this case, the powder was mixed with air introduced by adjusting the air flow, and the dry powder was sprayed from the air outlet nozzle.

[0003]

However, in a structure in which dry powder is mixed with air while stirring it, as in the above-mentioned prior art, the amount of dry powder and the amount of air mixed therewith are kept constant. Even if it can be done, dry powder may stay in the mixing chamber without being mixed with air, and the dispersibility of the dry powder, and the dispersion accuracy are not uniform, and the dispersion area is narrow, It is difficult to cope with a large-sized liquid crystal substrate and high-precision spacer processing.

[0004]

DISCLOSURE OF THE INVENTION In view of the above-mentioned problems, the present invention provides a funnel-shaped nozzle hopper having a cylindrical dry powder inlet and a dry powder introduction of a nozzle hopper. A first nozzle having a cylindrical first air injection port that is provided with a gap outside the mouth and that hangs down, and a first swirling air flow that is connected above the first nozzle and turns in one direction; A first air supply system for generating the first swirling air cavitation; and a second air supply system including a cylindrical second air injection port which is enclosed and provided with a gap outside the air injection port of the first nozzle and is downwardly suspended. It comprises a second nozzle and a second air supply system connected above the second nozzle and configured to generate a second swirling air flow and a second swirling air cavitation swirling in the other direction.

Further, a first air supply system and a second air supply system are provided by using the cavitation nozzle for spraying dry powder.
The air is simultaneously supplied from an air supply system to generate a first swirling air flow and a first swirling air cavitation in the first nozzle in one direction, and a second swirling air cavitation in the second nozzle in the other direction. While generating a swirling air flow and a second swirling flow air cavitation, a predetermined amount of dry powder is supplied to the nozzle hopper, and the dry powder is dropped from the dry powder introduction port to be applied.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to connect independent air supply systems each having an adjustable air pressure, and to assemble nozzles that generate swirling air cavitation that swirls in one direction and the other, respectively. In order to provide a cavitation nozzle for spraying dry powder with excellent dispersion accuracy that can adjust the dispersion density and dispersion angle of the dry powder and the dispersion area, high-precision spacer processing of liquid crystal substrates, which are becoming increasingly larger today. It is an object of the present invention to provide a cavitation nozzle for spraying dry powder, which enables the cavitation nozzle.

[0007]

According to the present invention, by operating the first air supply system, the first swirling air cavitation is generated below the inlet of the nozzle hopper, and the second air supply system is operated by operating the second air supply system. A second swirling air cavitation that reverses the first swirling air cavitation is generated below the air injection port of one nozzle, and the dry powder is supplied from the supply port of the nozzle hopper, whereby the first nozzle is driven by the first nozzle. Is stirred by the first swirl air cavitation, reaches the tip of the first swirl air cavitation, is dispersed during the second swirl air cavitation of the second nozzle, and further, the second swirl of the second nozzle The dry powder in which the flow air cavitation is dispersed can be stirred again and sprayed on the liquid crystal substrate, By adjusting the wind pressure of each air supply system and changing the wind pressure amount of each swirling air cavitation, it is possible to finely adjust the dispersion density and dispersion angle of the dry powder and the dispersion area. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The cavitation nozzle for spraying dry powder according to the present invention will be specifically described below with reference to the drawings of the embodiments.

FIG. 1 is a schematic plan view of a cavitation nozzle for spraying dry powder of the present invention, and FIG. 2 is a schematic explanatory view for explaining an embodiment of a cavitation nozzle for spraying dry powder of the present invention.

According to the present invention, in a dry powder spraying apparatus for processing a spacer of a liquid crystal substrate E, a nozzle generating a swirling air cavitation swirling in one direction and a nozzle generating a swirling air cavitation swirling in the other direction are combined. A cavitation nozzle for spraying dry powder provided, more specifically, an air injection port of the first nozzle that generates a first swirl air cavitation, and a second swirl that rotates in a direction opposite to the first swirl air cavitation.
The present invention relates to a cavitation nozzle for dry spraying, in which a second nozzle that generates swirling air cavitation is assembled, and a method for applying dry powder using the nozzle, for a funnel-shaped nozzle having a cylindrical dry powder inlet 1a. A hopper 1 and a cylindrical first air injection port 2 which is enclosed and provided with a gap outside the dry powder introduction port 1a of the nozzle hopper 1 and is hung downward.
a first nozzle 2 having a and a first air supply system 3 connected above the first nozzle 2 to generate a first swirling air flow and a first swirling air cavitation C which are swirled in one direction; A second nozzle 4 having a cylindrical second air injection port 4a which is enclosed with a gap provided outside the air injection port 2a of the first nozzle 2 and which is suspended downward, and is connected above the second nozzle 4; And a second air supply system 5 for generating a second swirling air flow that swirls in the other direction and a second swirling air cavitation C ′.

Further, in the method of applying dry powder D, a funnel-shaped nozzle hopper 1 having a cylindrical dry powder inlet 1a and a gap outside the dry powder inlet 1a of the nozzle hopper 1 are provided. A cylindrical first air injection port 2 which is provided and included and is downwardly hung down.
a first nozzle 2 having a and a first air supply system 3 connected above the first nozzle 2 to generate a first swirling air flow and a first swirling air cavitation C which are swirled in one direction; A second nozzle 4 having a cylindrical second air injection port 4a which is enclosed with a gap provided outside the air injection port 2a of the first nozzle 2 and which is suspended downward, and is connected above the second nozzle 4; The first air supply system is provided using a dry powder spraying cavitation nozzle having a second air supply system 5 for generating a second swirling air flow swirling in the other direction and a second swirling air cavitation C ′. 3 and the second air supply system 5 to simultaneously supply air to generate a first swirling air flow and a first swirling air cavitation C which are swirled in one direction in the first nozzle 2, To the other direction While generating a second swirling air flow and a second swirling air cavitation C ′, a certain amount of dry powder D is supplied to the nozzle hopper 1 and the dry powder D is supplied from the dry powder inlet 1 a. It is applied by dropping.

That is, the nozzle hopper 1 of the cavitation nozzle for spraying dry powder according to the present invention comprises a dry powder receiving port 1b having a substantially inverted conical shape, and a dry powder suspended in a cylindrical shape below the dry powder receiving port 1b. It is a funnel-shaped one formed by the inlet 1a, and a first nozzle 2, which will be described later.
This is supplied to the second nozzle 4.

The first nozzle 2 of the present invention includes a dry powder inlet 1a of the nozzle hopper 1 at a center side thereof with a gap therebetween, and a first swirling air cavitation below the dry powder inlet 1a. The first air injection port 2 which has a space enough to generate C and is suspended in a cylindrical shape.
a, that is, a first through-hole 2b is formed in the upper surface of the first nozzle 2 to penetrate below the nozzle hopper 1.

Above the first nozzle 2, one or a plurality of air sources connected to a first air supply system 3 for generating a first swirling air flow and a first swirling air cavitation C which will be described later in one direction. The first air introduction hole 2c is opened.

The first air introduction hole 2c is opened so as to be shifted to one of the axial center lines of the dry powder introduction port 1a of the nozzle hopper 1 included in the first air injection port 2a. A first swirling air flow and a first swirling air cavitation C that swirl in the direction are generated.

Next, the first air supply system 3 is connected to the first air introduction hole 2c via a joint 3c via an air pump and an air compressor 3a and an air hose 3b capable of adjusting the air pressure. 2c is to supply air.

The second nozzle 4 of the present invention has the first side at the center side.
The first air injection port 2a of the nozzle 2 is included with a gap therebetween, and has a sufficient space below the first air injection port 2a to generate the second swirling air cavitation C '. In other words, the second air injection port 4a is formed so as to hang down, that is, a second through hole 4b is formed in the upper surface of the second nozzle 4 to allow the first nozzle 2 to penetrate. .

[0018] Above the second nozzle 4, one or more connected to a second air supply system 5 for generating a second swirling air flow and a second swirling air cavitation C 'to be swirled in the other direction described later. The second air introduction hole 4c is opened.

The second air introduction hole 4c is oriented in a direction opposite to the first air introduction hole 2c from the axial center line of the first air injection port 2a of the first nozzle 2 included in the second air injection port 4a. The second swirling air flow and the second swirling air cavitation C ′ which are opened so as to be deviated and swirl in the other direction are generated.

Next, the second air supply system 5 is connected to the second air introduction hole 4c at a joint 5c via an air pump and an air compressor 5a and an air hose 5b capable of adjusting the air pressure. 4c is supplied with air.

The dry powder dispersing cavitation nozzle of the present invention is a dry powder dispersing nozzle of a dry powder dispersing device for performing spacer processing of a liquid crystal substrate E, and as shown in FIG. A program section P for freely controlling the spacer processing step, a dry powder spraying chamber 7 for mounting the liquid crystal substrate E on the floor to perform spacer processing, and a central portion at the top of the dry powder spraying chamber 7 at the center. It has a nozzle mounting hole 7a formed, an exhaust hole 8 formed on the side surface of the dry powder spraying chamber 7, and an exhaust damper 9 capable of opening and closing the exhaust hole 8.

Then, the cavitation nozzle for dry powder spraying of the present invention is attached to the nozzle mounting hole 7a of the main body 6 of the dry powder spraying device, and the dry powder D is supplied above the nozzle hopper 1 of the cavitation nozzle for dry powder spraying. A dry powder supply device 11 provided with a powder supply hopper 10 is provided.

Next, the program density P of the dry powder spraying apparatus main body 6, the spray density, the spray angle, and the spray area of the dry powder D, and the first air supply system 3 and the second air supply system 5, respectively. , The settling time of the sprayed dry powder D, etc. are all set, and the liquid crystal substrate E for spacer processing is mounted on the floor of the dry powder spraying chamber 7.

First, the first air supply system 3 is operated to generate a first air swirling flow which swirls in one direction in a gap around the dry powder inlet 1a of the nozzle hopper 1 in the first nozzle 2. The first swirling air flow is generated while the first swirling air cavitation C is generated below the dry powder inlet 1a of the nozzle hopper 1.
The swirling injection is performed from the air injection port 2a.

At the same time, the second supply system 5 is also operated,
A second air swirling flow swirling in the other direction opposite to the first air swirling flow is generated in a gap around the air injection port 2 a of the first nozzle 2 in the second nozzle 4. The two-air swirl flow is swirl-injected from the second air outlet 4a while generating a second swirl air cavitation C 'below the air injection port 2a of the first nozzle 2.

At this time, the second cavitation C 'is the first
The cavitation C is included.

Next, a predetermined amount of dry powder D is supplied from the dry powder supply hopper 10 of the dry powder supply device 11 to the nozzle hopper 1 by the program section P.

The dry powder D supplied to the nozzle hopper 1 falls into the first swirling air cavitation C generated below the dry powder inlet 1a of the nozzle hopper 1 while being stirred. It reaches the lower part in the first cavitation C, and is then dispersed in the second swirling air cavitation C 'which swirls in the opposite direction.

The second swirling air cavitation C '
The dry powder D dispersed therein is stirred again by the second swirling air cavitation C ', and from below the second swirling air cavitation C', the dry powder spraying chamber 7 of the dry powder spraying device main body 6 is dried. Are sprayed on the upper surface of the liquid crystal substrate E mounted on the floor surface of the liquid crystal display.

After the settling time of the floating of the dry powder D has elapsed, the exhaust damper 9 is opened to exhaust air.
The spacer processing of the liquid crystal substrate E mounted on the floor of the inside of the dry powder spraying apparatus main body 6 is completed.

The cavitation nozzle for dry spraying according to the present invention comprises a first air supply system 3 and a second air supply system 5.
By adjusting the respective wind pressure amounts of the first and second swirling flow air cavitations C and C ′, the dispersion density and the dispersion angle of the dry powder D to be sprayed, and the dispersion area can be reduced. It can be finely adjusted.

[0032]

According to the cavitation nozzle for spraying dry powder of the present invention constructed as described above, the first swirl air cavitation is generated by the operation of the first air supply system below the hopper for the nozzle into which the dry powder is charged. A second swirling air cavitation is generated below the first nozzle to reversely swirl so as to include the first swirling air cavitation by the operation of the second air supply system, and dry powder is supplied from the nozzle hopper. The first swirling air cavitation disperses while agitating the dry powder, and further, the second swirling air cavitation that reversely swirls the dry powder that has passed through the first swirling air cavitation is finely re-stirred and dispersed. As a result, the dispersion uniformity of the dry powder is significantly improved. The feed system and the second feed system are each independently adjustable so that the wind pressure can be adjusted, and the wind pressure of each swirling flow can be adjusted to enable fine adjustment of the dispersion density and dispersion angle of the dry powder and the dispersion area. Today, the present invention realizes spacer processing which is compatible with an increasingly larger liquid crystal substrate and has excellent dispersion accuracy, and has an extremely significant effect.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a cavitation nozzle for spraying dry powder of the present invention.

FIG. 2 is a schematic explanatory view for explaining an embodiment of a cavitation nozzle for spraying dry powder according to the present invention.

[Explanation of symbols]

 C First swirl air cavitation C 'Second swirl air cavitation D Dry powder E Liquid crystal substrate 1 Nozzle hopper 1a Dry powder inlet 1b Dry powder receiving port 2 First nozzle 2a First air injection port 2b First through hole 2c 1st air introduction hole 3 1st air supply system 3a air pump and air compressor 3b air hose 3c joint 4 2nd nozzle 4a 2nd air injection port 4b 2nd through hole 4c 2nd air introduction hole 5 2nd air supply system 5a air pump And air compressor 5b air hose 5c joint 6 dry powder spraying device main body 7 dry powder spraying chamber 7a nozzle mounting hole 8 exhaust hole 9 exhaust damper 10 hopper 11 dry powder supply device P program section

Claims (2)

(57) [Claims] 1. A funnel-shaped nozzle hopper having a cylindrical dry powder inlet and a dry powder inlet of the nozzle hopper in a dry powder spraying nozzle of a dry powder spraying device for processing a spacer for a liquid crystal substrate. A first nozzle having a cylindrical first air injection port which is provided with a gap on the outside of the nozzle and which hangs downward, and a first swirling air flow which is connected above the first nozzle and turns in one direction. A first air supply system for generating the first swirling air cavitation; and a cylindrical second air injection port which is enclosed and provided with a gap outside the air injection port of the first nozzle and which is suspended downward. A second nozzle, a second air connected above the second nozzle and configured to generate a second swirling airflow and a second swirling air cavitation swirling in the other direction; Cavitation nozzle dry powder spray, characterized by comprising a feeding system. 2. A funnel-shaped nozzle hopper having a cylindrical dry powder inlet, and a dry powder inlet of the nozzle hopper in a dry powder spraying nozzle of a dry powder spraying device for processing a spacer for a liquid crystal substrate. A first nozzle having a cylindrical first air injection port which is provided with a gap on the outside of the nozzle and which hangs downward, and a first swirling air flow which is connected above the first nozzle and turns in one direction. A first air supply system for generating the first swirling air cavitation; and a cylindrical second air injection port which is enclosed and provided with a gap outside the air injection port of the first nozzle and which is suspended downward. A second nozzle, a second air connected above the second nozzle and configured to generate a second swirling airflow and a second swirling air cavitation swirling in the other direction; Using cavitation nozzle nozzle for dry powder spraying equipped and feeding system, and simultaneously supplies air from a first air supply system and the second air supply system,
A first swirling air flow and a first swirling air cavitation swirling in one direction in the first nozzle, and a second swirling air flow and a second swirling air cavitation swirling in the other direction in the second nozzle. A method of applying a cavitation nozzle for spraying dry powder, comprising supplying a fixed amount of dry powder to a nozzle hopper while dropping the dry powder from a dry powder inlet, and applying the dry powder.