JPS6359364A - Rotary atomizing type coater - Google Patents

Abstract

PURPOSE:To prevent the distortion of a coating pattern by equalizing the speeds of air streams at the time of collision, by deflecting the jet directions of air colliding with the outer peripheral surface of an atomizing head from almost symmetric positions holding the atomizing head therebetween to specific directions. CONSTITUTION:When a fan-shaped air stream is formed by air injecting from respective air jet orifices 20 to collide with the outer peripheral surface of the tips of atomizing heads 3, 8, the left and right jet directions of the upper and lower air jet orifices 20 are deflected from the direction going to the axes of the respective atomizing heads 3, 8 to the direction on the side opposite the revolving direction of the outer peripheral surface of the atomizing heads 3, 8 at positions where the air injected from the air jet orifices 20 collides. Therefore, the acceleration and deceleration of the air streams due to the deflection of the jet directions of the air jet orifices 20 set off against those of the air streams due to the rotation of the atomizing heads 3, 8 and the speeds of the air streams colliding with the outer peripheral surfaces of the atomizing heads 3, 8 at the time of collision become equal and, as a result, the painting pattern is not distorted in the atomizing head rotational direction.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a rotary atomization type coating device capable of producing a flat coating pattern.

<Prior art> As disclosed in Japanese Patent Application No. 60-187980, this type of coating device has an atomizing head attached to the rotating shaft of a rotary drive device, and a paint supply path connected to the base end of the atomizing head. Then, a paint discharge part is formed at the tip of the atomizing head, and as illustrated in FIGS. 11 to 13, the outer periphery of the tip of the atomizing head a is A pair of air ejection ports (a) and (b) are provided to eject air diagonally forward toward the surface.

A flat-shaped painting pattern is used to obtain a high-quality, wide painted surface. In that case, the short axis direction of the flat-shaped painting pattern, L! For U, the coating equipment is moved back and forth in the thickness direction to apply multiple coats, making the thickness and finish of the coating uniform.

At this time, the distance over which the coating device is reciprocated is set so that the coating pattern passes almost completely over the surface to be coated, so the following equation is obtained.

L = Text + T However, 1 text is the passing distance of the coating pattern on the surface to be painted, and T is the length of the coating pattern in the minor axis direction, that is, the thickness.

Here, the thickness T of the coating pattern is the distance for coating other than the surface to be coated, so the shorter the thickness, the better.

<Problems to be Solved by the Invention> However, as illustrated in FIG. 14, the flat-shaped coating pattern obtained by the above-mentioned coating apparatus has a distortion in which the left half and right half are slightly shifted vertically, and the pattern is distorted in the vertical direction. The thickness T increases.

Therefore, since the distance T for painting other than the surface to be painted becomes longer, the amount of paint consumed and the time required for painting increase, and the cost of painting increases.

Book 9. The purpose of II is to solve the conventional problems as mentioned above.

As shown in FIGS. 11 to 13, a pair of air jet ports are arranged vertically and symmetrically across the atomizing head a, facing toward the axis of the atomizing head a. When air is ejected obliquely from b toward the outer circumferential surface of the tip of the atomizing head a, one air outlet is created. The airflow that collided and flowed to the left and right sides along the cylindrical surface of the outer circumference, and the airflow that flowed to the left and right sides, respectively,
A similar air flow ejected from the other air injection port and flowing to the left and right sides along the outer circumferential surface of the tip of the atomizing head a collides with the same air flow at the left or right side of the outer circumferential surface of the atomizing head a. Then, it is bent forward.

That is, the air streams ejected from each air outlet (a) cover the upper or lower half of the outer peripheral surface of the tip of the atomizing head (a), and flow forward as a fan-shaped air stream. .

However, the atomizing head a rotates to atomize the paint, and as shown by the arrows in FIGS. 11 to 13, the outer peripheral surface of the atomizing head a rotates in the circumferential direction. There is.

Therefore, the airflow flowing to the left and right sides along the outer peripheral surface of the tip of the atomizing head a is influenced by the rotation of the atomizing head a, and the direction of rotation of the outer peripheral surface of the atomizing head a The airflow flowing in the same direction is accelerated by the rotation of the atomization head a, while the airflow flowing in the opposite direction to the rotation direction of the outer peripheral surface of the atomization head a is decelerated by the rotation of the atomization head a. .

That is, at the left and right positions of the outer circumferential surface of the atomizing head a, the airflow accelerated by the rotation of the atomizing head a and the airflow decelerated by the rotation of the atomizing head a collide, and the upper side and A lower fan-shaped airflow will be formed.

Therefore, even if air is ejected from both the upper and lower air ejection ports under the same conditions, the high-speed airflow is accelerated by the rotation of the atomization head a, and the airflow is decelerated by the rotation of the atomization head &. The low-speed air streams collide, and as a result, both fan-shaped air streams are atomized, respectively. It has a velocity component in the rotational direction of &.

Therefore, the coating particles emitted in the radial direction from the paint discharge part of the atomized yAa are carried to the surface to be coated by riding on both of the above-mentioned fan-shaped air flows, so that the coating pattern is formed by the atomized head a. This results in distortion in the direction of rotation.

As is clear from the above causes, in order to prevent the coating pattern from being distorted in the direction of rotation of the atomizing head, two air particles colliding on the outer peripheral surface of the atomizing head must be It is sufficient to equalize the velocities at the time of collision of the flows.

Therefore, the ejection direction of the pair of air jet ports that eject air that collides with the outer peripheral surface of the atomizing head from approximately symmetrical positions across the atomizing head is changed from the direction toward the axis of the atomizing head, respectively. When the air ejected from the jet nozzle is deflected in the direction opposite to the direction of rotation of the outer circumferential surface of the atomizing head at the collision point, the airflow flowing to the deflected side increases in speed and flows to the opposite side to the deflected side. The airflow decreases in velocity. In other words, the airflow that is decelerated by the rotation of the atomization head increases in speed, while the airflow that is accelerated by the rotation of the atomization head decelerates. It has been noticed that the decelerations cancel out and the two air streams colliding on the outer circumferential surface of the atomizing head have equal collision velocities.

Therefore, as is clear from the above, the present invention provides an atomizing head that is attached to the rotating shaft of a rotary drive device, a paint supply path connected to the base end of the atomizing head, and paint discharged from the tip of the atomizing head. In a rotary atomizing coating device, the air blowing device is equipped with an air blowing device that blows out an air flow that bends the paint particles emitted from the paint discharge portion forward. A rotary atomizing coating device having a pair of air jets that jet air that collides with the outer circumferential surface of an atomizing head from substantially symmetrical positions sandwiched therebetween, the jetting direction of each of the air jets being set as follows: A rotation characterized by being arranged in a direction that is deflected from the direction toward the axis of the atomizing head to the opposite side to the rotational force of the outer circumferential surface of the atomizing head at the position where the air ejected from the air outlet collides. This is an atomization type painting device.

Function> In the rotary atomizing coating apparatus of the present invention, the jetting direction of the pair of air jetting ports that jets out air that collides with the outer peripheral surface of the atomizing head from approximately symmetrical positions across the atomizing head is as follows: Each from the direction toward the axis of the atomizing head.

As it is clear from the above, the atomizing head is deflected in a direction opposite to the direction of rotation of the outer circumferential surface of the atomizing head at the position where the air ejected from the air jet collides with the atomizing head. For the two airflows that collide on the outer circumferential surface, the acceleration and deceleration due to the deflection of the injection direction and the acceleration and deceleration due to the rotation of the atomizing head cancel each other out, and the speeds at the time of collision become equal, and as a result, the fan-shaped rain airflow , each has no velocity component in the rotational direction of the atomizing head,
The paint pattern is not distorted in the direction of rotation of the atomizing head.

First embodiment (see Figures 1 to 4)> Figures 1 and 2
The rotary atomization type coating device of this example shown in the figure has a rotary shaft 2 protruding from the tip of the case of an air turbo motor 1 with a maximum rotation speed of 60,000 revolutions per minute, and a disk portion 5 at the tip of a cylindrical portion 4. are connected in a concentric manner, and the tip of the rotation 4i2 of the air turbo motor is tightly fitted into the mounting hole 6 at the center of the disc part 5 of the hub. Attach the hub 3 concentrically to the rotating shaft 2 of the air turbo motor using screws 7 passing through the position, fit the rear half of the cylindrical body 8 on the outer periphery of the hub 3, and fit the front half of the cylindrical body 8 into the hub 3. Protruding to the front position,
The cylindrical body 8 is concentrically attached to the hub 3 by screws 9 passing through its peripheral wall, and the integrated hub 3 and the cylindrical body 8 constitute a cylindrical atomizing head.

The atomizing heads 3 and 8 are connected to a DC high voltage generator (not shown) via the air turbo motor 1, and also serve as charging electrodes.

A paint supply path 10 connected to a paint supply device (not shown) is attached to the tip of the case of the air turbo motor 1, and the tip opening of the paint supply path 10 is placed inside the cylindrical portion 4 of the hub of the atomizing head. A paint supply path IO is connected to the annular base ends of the chemical heads 3 and 8.

A large number of paint passage holes 11 are provided at equal intervals at the tip of the peripheral wall of the cylindrical portion 4 of the hub 3 of the atomizing head, so that the annular base end of the atomizing head 3.8 is connected to the annular tip of the atomizing head. The inner peripheral surface of the front half of the cylindrical body 8 is formed into a paint flow surface 12, and at the tip of the paint flow surface 12, a large number of paint flow branches yt13 are arranged at equal intervals to prevent air from being drawn into the paint particles. is formed along the axial direction, and the tip edge of the paint flow surface 12, that is, the annular opening edge at the tip of the cylindrical body 8 serves as the paint discharge portion 14.

Further, air blowing devices 15 are similarly provided at the upper and lower positions of the tip of the case of the air turbo motor 1, respectively.

The pair of upper and lower air blowing devices 15 has a base 16 fixed to the upper and lower surfaces of the case tip of the air turbo motor l with screws 17, respectively, and is positioned above the rear half of the atomizing head 3.8. , arranged in the lower position 211. .

An air passageway 18 is formed within each base body 16, and each air passageway 18
A high-pressure air supply path 19 is connected to the high-pressure air supply path 19 through which a separation control valve (not shown) for adjusting the coating pattern is interposed.

As shown in FIG. 1, pores 20 communicating with the air passage 18 are bored in the tip inclined surfaces of both the upper and lower base bodies 16 located behind the paint discharge part 14 of the atomizing head. , atomization head 3,
Atomization from symmetrical positions above and below 8! A pair of air jet ports 20, 20 are provided to jet air diagonally forward toward the outer circumferential surface of the tip.

As shown in FIG. 2, the left and right jetting directions of each air jetting port 20 are directed from the direction toward the axes of the atomizing heads 3 and 8 to the point where the air jetting from the air jetting port 20 collides with the mist. Kato 3
, 8 is deflected in the opposite direction to the rotating direction of the outer peripheral surface. Its deflection angle O is 10 degrees. The deflection angle θ is determined by the atomization head 3.
It is determined by the outer diameter of 8 and the normal rotation speed, and generally,
The angle is preferably within 60 degrees.

As shown in FIG. 1, the front and rear jet directions of each air jet port 20 are determined by an angle α of 5
This is the direction where the angle becomes 0 degrees. The angle α is preferably 0 to 90 degrees.

The air outlet 20 has a diameter and a number of two, 2.4 am, and therefore has a total opening area of about 9 m.

From a practical standpoint, the total opening area is preferably about 50 cm2 or less.

Further, as shown in FIG. 1, the distance S from the point on the outer peripheral surface of the atomizing heads 3, 8 where the air ejected from each air outlet 20 collides to the paint discharge portion 14 is 10 mm. That distance #
S is preferably 0 to 50 m long.

The distance between the upper and lower air outlets 20.20 is 50 1
It is. The outer diameter of the atomizing head 3.8, ie, the outer diameter d of the paint discharge portion 14, is 37 mm. Both upper and lower air outlets 20.
From a practical point of view, the distance raD between 20 and 1
It is preferably four times or less the outer diameter d of No. 4.

The external shape of the atomizing heads 3 and 8 is a cylindrical shape with equal diameter, but it may also be a tapered or tapered truncated conical shape. If the atomizing head is a truncated conical shape, the generating line of the outer peripheral surface of the atomizing head and the mist The angle formed by the axes of the chemical head is preferably within 45 degrees.

When the rotary atomizing coating device of this example is driven, the atomizing head 3, 8
rotates at high speed in the direction of the arrow shown in FIG. High-pressure air is supplied to the air passage 18 of the squirt bag, air is ejected from each air outlet 20, and paint is supplied from the paint supply passage 10 into the hub 3 of the atomizing head.

The paint supplied to the base ends of the rotating atomizing heads 3 and 8 passes through the paint passage hole 11 and reaches the paint flow surface 12 due to centrifugal force, and flows on the paint flow surface 12 in the form of a thin film. Molecule l flows into the groove 13 and is separated into a liquid flow, and the paint discharge part 14
is emitted in the radial direction, resulting in fibrous atomization.

On the other hand, the air ejected from the upper and lower air ejection ports 20 is
Each collides with the outer peripheral surface of the tips of the atomizing heads 3 and 8, and flows along the cylindrical surface of the outer peripheral surface to both the left and right sides. A similar air flow that is injected from the air injection port 20 and flows to the left and right sides along the outer peripheral surface of the tip of the atomizing heads 3, 8 and the atomizing heads 3, 8
It collides at the left or right position t of the outer peripheral surface and is bent forward. That is, the air ejected from each air outlet 20 covers the upper or lower half of the outer peripheral surface of the tip of the "R" jlij 13.8, and flows forward as a fan-shaped air flow.

The paint particles emitted in the radial direction from the paint discharge part 14 of the atomizing head are mainly caused by the force of the fan-shaped air flow and the electrostatic attraction acting between the paint particles and the object to be coated. It is carried forward by the shaped airflow and adheres to the object to be coated.

When a fan-shaped air flow is formed by the air ejected from each air outlet 20 and collides with the outer circumferential surface of the tips of the atomizing heads 3 and 8, the left and right ejection directions of the upper and lower air outlets 20 are ,
Since the air ejected from the air ejection port 20 is deflected from the direction toward the axis of the atomization yA3.8, to the opposite side to the rotation direction of the outer circumferential surface of the atomization heads 3 and 8 at the collision position, respectively. , compared to the conventional case without deflection, the air flow undulating to the deflected side, that is, the air flow decelerated by the rotation of the atomizing heads 3 and 8, increases in speed, while the air flow wavering to the deflected side The airflow flowing in the opposite direction, ie the airflow accelerated by the rotation of the atomizing heads 3, 8, decelerates.

Therefore, the acceleration/deceleration due to the deflection of the jetting direction of the air jet port 20 and the acceleration/deceleration due to the rotation of the atomizing heads 3, 8 are canceled out, and the air flow colliding on the outer peripheral surfaces of the atomizing heads 3, 8 is offset. The velocities at the time of collision are equal.

As a result, the fan-shaped blue air flow is generated by the atomization head 3,
8, it does not have a velocity component in the rotational direction.

Therefore, the coating pattern will not be distorted in the direction of rotation of the atomizing heads 3, 8.

When adjusting the coating pattern, the flow rate of air ejected from the air outlet 20 is adjusted by the flow rate adjustment valve of the high-pressure air supply path 19.

The relationship between the one dimension of the shape of the coating pattern and the flow rate of air ejected from both air ejection ports 20 is as illustrated in FIGS. 3 and 4.

When the above-mentioned air VT amount is zero, the coating pattern becomes an annular shape with an outer diameter of about 90 cm, as shown in Figure 3.
When the air flow rate is 500 AC/in.

As shown in FIG. 4, it has a dumbbell-like flat shape with a left and right length of 75c layers and a top and bottom thickness of 20cm.

Its flat shape has almost no distortion, the thickness is reduced by 10 cm, and the length is increased by 5 cm, compared to the conventional case where the deflection angle 0 of the left and right jet directions of the air jet nozzle 20 is zero. ing.

2nd Embodiment (See Figures 5 to 1θ) The rotary atomizing coating device of this example shown in Figures 5 and 6 is comparable to the air jet device 15 in the previous example. In addition to the second air blowing device 57, there is a first air blowing device 51t.
- Yes.

The first air blowing device 51 has an annular base body 52 fixed to the tip of the case of the air turbo motor 1 with screws 53 concentrically with the atomizing head 3.8, and the second half of the atomizing head 3.8. An annular air passage 54 is formed in the base body 52 arranged at the outer circumference of the part, and a high-pressure air supply passage 55 is connected to the air passage 54 through a flow control valve (not shown) for adjusting the coating pattern. .

As shown in FIGS. 5 and 6, on the front surface of the base body 52 located behind the paint discharge part 14 of the atomizing head.

A large number of first air nozzles 56 are bored in communication with the air passage 54, and are arranged at equal intervals in an annular shape similar to the atomization gA3, 8, and the jetting direction of each first air nozzle 56 is set so as to It is placed slanted toward the center.

The first air outlet 56 has a diameter and number of 0.6 layers and 33 layers.
Therefore, the total aperture area is approximately 10.times.2.

From a practical standpoint, the total opening area is preferably about 40 layers or less.

The ejection direction of the first air ejection port 56 is such that the angle between the first air ejection port 56 and the generatrix of the outer peripheral surface of the atomizing head 3.8 is 10 degrees. From a practical standpoint, the angle is preferably greater than zero degrees and smaller than a right angle.

The paint discharge part 14 of the atomization head from the opening of the first air outlet 56
The distance is 20 km.

The center diameter of the first air jet ports 56 arranged in an annular shape is 44 mm.
It is a horse seal. In addition, the outer diameter of the atomization head, that is, the paint discharge part 1
The outer diameter of No. 4 is 37 mm.

Further, second air blowing devices 57 are similarly provided at the upper and lower positions 1 of the base body 52 of the first air blowing device, respectively.

The pair of upper and lower second air blowing devices' 1157 has a block-shaped base 58 fixed to the upper and lower surfaces of the base 52 of the first air blowing device, respectively, to form the rear half of the atomizing head 3.8. An air passage 59 is formed in each base body 58, and a high-pressure air supply passage 60 is connected to each air passage 59 through a flow control valve (not shown) for adjusting the coating pattern. There is.

As shown in FIGS. 5 and 6, two air passages 59 are provided on the tip inclined surfaces of both the upper and lower base bodies 58 located behind the paint discharge part 14 of the atomizing head, respectively. Pore 6
1 is drilled at a position slightly shifted to the right or left side from the vertical line passing through the axes of the atomizing heads 3, 8. two pairs of second air jets 6 that jet air diagonally forward toward the outer circumferential surface of the tip of the
1 is provided.

, the distance fie by which the opening position of each second air outlet 61 deviates to the right or left from the vertical line passing through the axis of the atomizing head 3.8 is 3.
It is the Zen layer. The distance #e is preferably shorter than one quarter of the diameter of the atomizing head 3.8.

The distance between the upper and lower second air jet holes 61.61 is 8.
It is a proverb.

As shown in FIG. 6, the left and right jet directions of each of the second air jet ports 61 are on the right side, from the vertical line passing through the axes of the atomizing heads 3 and 8;
The atomizing head 3 is located at a position slightly shifted to the left, facing directly below and directly above, and is therefore at a position where the air ejected from the air outlet 61 collides from the direction toward the axes of the atomizing heads 3 and 8.
, 8 is a direction deflected to the opposite side to the rotating direction of the outer circumferential surface.

Its deflection angle is about 4 degrees.

As shown in FIG. 5, the front and rear jetting directions of each second air jetting port 61 are determined by an angle α between the generating line of the outer circumferential surface of the atomizing head 3.8.
is the direction in which the angle is 70 degrees.

The diameter and number of the second air blowing holes 61 are 1.4 mm and 4.
Therefore, the total opening area is approximately 6 mm.

In addition, as shown in FIG. 5, the distance from the point on the outer peripheral surface of the atomizing heads 3, 8, where the air ejected from each second air outlet 61 collides, to the paint discharge part 14 is between the LL++ layer and the 51st layer. It is.

The other points are the same as in the previous example, so the fifth
The same reference numerals are given to the figure and FIG. 6, and the explanation thereof will be omitted.

When adjusting the coating pattern, the fit amount of the first air jetted from the first air jetting port 56 and the flow rate of the second air jetted from the second air jetting hole 61 are each adjusted by 2 g.

The shape and dimensions of the coating pattern and the above-mentioned first air flow rate and second
The relationship between the air flow rates is as illustrated in FIGS. 7 and 10.

When the first air flow rate and the second air flow rate are zero, the coating pattern becomes an annular shape with an outer diameter of about 90 cm, as shown in FIG. 7. Further, when the first air flow rate is 200 min/waterfall and the second air amount Ii is zero, as shown in FIG. 8, it becomes a disk shape with a diameter of about 40 cm.

Also, when the first air flow rate is zero and the second air flow rate is 3001/
In the case of a win, as shown in FIG. 9, it becomes a flat dumbbell shape with a left and right length of 65 centimeters and a top and bottom thickness of 15 centimeters. In addition, when the first air flow rate is 200 in/in and the second air flow is 300 in/in, the left and right length is 55 cm and the upper and lower thickness is 2 as shown in Figure 10.
It becomes a flat oval shape of 0 cm.

Their flat shape has almost no distortion and is thick compared to the conventional case in which the opening position of the second air blowing hole 61 is not deviated to the left or right from the vertical line passing through the axes of the atomizing heads 3 and 8. Saga 5
~loc intestine has decreased and its length has increased by about 5 cm.

The coating efficiency is slightly lower than in conventional rotary atomization coating equipment, but higher than in air atomization PJi coating equipment.

The average velocity (=air flow rate/total opening area) of the ejected air at each opening of the first air ejection port 56 and the second air ejection hole 61 should preferably exceed the speed of sound.

In the first and second embodiments described above, the number, size, shape, and arrangement position of the air jet ports are as shown above, but are not limited to these. Although the air jet ports are arranged at positions sandwiching the atomizing head, they may also be arranged at positions sandwiching the air turbo motor.

Further, although the air blowing device is attached to the case of the air turbo motor, it is not limited to this, and for example,
In the case of a rotary atomization type coating device for cleaning cover cylinders, it may be attached to the cleaning cover cylinder.

Furthermore, although the coating device is an electrostatic type, it is not limited thereto, and may be a non-electrostatic type.

Effects of one batch of atomization> The flat-shaped coating pattern obtained by the rotary atomization coating device of the present invention is not intended to be flat.

The thickness of the flat shape in the short axis direction does not increase.

Therefore, when obtaining a wide, high-quality coating surface, compared to using a conventional rotary atomization coating device, the distance layer that covers the surface other than the surface to be coated is shorter, reducing paint consumption and coating time. This reduces painting costs.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal side view of a rotary atomization type coating apparatus according to a first embodiment of the present invention. FIG. 2 is a front view of the interior. 3 and 4 are schematic diagrams showing examples of coating patterns in the same apparatus. FIG. 5 is a partially longitudinal side view of a rotary atomizing coating apparatus according to a second embodiment of the present invention. FIG. 6 is a front view of the device. FIG. 7 to FIG. 10 are schematic diagrams showing examples of coating patterns in the same apparatus. 11 to 13 are schematic diagrams showing the flow state of air ejected from the air ejection port in the conventional device.
The figure is a front view, FIG. 12 is a side view, and FIG. 13 is a plan view. Figure 14 is conventional! It is a schematic diagram showing an example of a coating pattern in A position. 1: Air turbo motor 9 rotation drive device 2: Rotating shaft 3, 8: Atomizing head 10: Paint supply path 14: Paint discharge section 15: Air jetting device 20: Air jetting port 51: First air jetting device 56: First 1 Air outlet 57: 2nd air outlet 61: 2nd air outlet θ: Deflection angle Patent applicant Toyota Central Research Institute Co., Ltd. Patent attorney Katsura Kino 72 Figure 73 Figure 74 Aerodynamics %f500 also In the case of ηin 76 Figure 7 Figure 7'8 Figure 79 Figure 713 Figure 14 Figure 711 Figure 7'12

Claims (2)

[Claims] (1) Attach the atomizing head to the rotating shaft of the rotary drive device, connect the paint supply path to the base end of the atomizing head, form the paint discharge part at the tip of the atomization head, and emit the paint from the paint discharge part. In a rotary atomizing coating device equipped with an air blowing device that blows out an air flow that bends the coating particles forward, the air blowing device has an air blower applied to the outer peripheral surface of the atomizing head from a substantially symmetrical position across the atomizing head. This is a rotary atomizing coating device that has a pair of air outlets that blow out air that collides with the air. A rotary atomizing coating device characterized in that the atomizing head is disposed in a direction opposite to the direction of rotation of the outer circumferential surface of the atomizing head at a position where air ejected from the air jetting port collides. (2) The rotating mist according to claim 1, wherein the air blowing device is provided with an annular air blowing port that blows air forward at an outer circumferential position of the tip of the atomizing head. Chemical painting equipment.