JP2567072B2 - Rotary atomizing coating device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a rotary atomizing type coating apparatus capable of obtaining a coating pattern having a small diameter.

<Prior Art> A rotary atomization type coating device is configured such that a cylindrical or cup-shaped atomizing head is concentrically attached to a rotary shaft of a high-speed rotary driving device, and an opening of a paint supply passage is arranged inside the atomizing head. Then, the inner peripheral surface of the atomizing head is formed as a paint flow surface, the opening edge of the front surface of the atomizing head is formed at the paint discharge part, and the paint flowing out from the opening of the paint supply passage is The paint flow surface is formed into a film and flows, and the paint is discharged from the paint discharge portion of the atomizing head as coating particles.

The atomizing head and the surface to be coated arranged in front of the atomizing head are configured to be connected to a DC high voltage generator.

Further, at the outer peripheral position of the atomizing head, an annular air jet for adjusting the coating pattern is concentrically provided, which is opened forward of the atomizing head, and by the air for spraying the coating pattern from this, The paint particles emitted from the paint discharge portion of the atomizing head in the radial direction of the atomizing head are bent in front of the atomizing head.

The air outlet for painting pattern adjustment is connected to the high-pressure air supply device via the flow rate adjusting valve, and the flow rate of the painting pattern adjusting air is increased or decreased by the flow rate adjusting valve to increase or decrease the diameter of the painting pattern. There is.

<Problems to be Solved by the Invention> However, in the rotary atomizing type coating apparatus, as the flow rate of the air for adjusting the coating pattern is increased, the diameter of the coating pattern is reduced, but this relationship has a limit. However, if this limit is exceeded, the diameter of the coating pattern will not shrink even if the flow rate of the coating pattern adjusting air is increased.

For example, if the spray distance between the paint discharge part of the atomizing head and the surface to be painted is about 15 cm, the diameter of the paint pattern decreases to about 15 cm as the flow rate of the paint pattern adjusting air increases. , Not less than that.

That is, the coating pattern has a narrow adjustment range and a large minimum diameter.

Therefore, the minimum diameter of the coating pattern is required when alternately coating a wide surface and a narrow surface to be coated, or when continuously coating a strip-shaped surface having a narrow portion and a wide portion. If it is larger than the narrow part of the narrow painted surface or strip-shaped painted surface,
A part of the paint is wasted, and the paint consumption increases.

An object of the present invention is to solve the above conventional problems.

<Causes of problems> In the above rotary atomization type coating device, the paint flowing out from the opening of the paint supply path is formed into a film on the paint flow surface of the atomization head by the centrifugal force based on the high speed rotation of the atomization head. Then, it flows and becomes a coating particle from the paint discharge part of the atomizing head and is emitted in the radial direction of the atomizing head.

This paint flies in front of the atomizing head by the force of the air for adjusting the coating pattern ejected toward the front of the atomizing head and the electrostatic attraction acting between the coating particles and the surface to be coated, A paint pattern is formed by adhering to the surface to be painted arranged in front of the atomizing head.

Therefore, by reducing the diameter of the flow of the coating particles from the atomizing head toward the surface to be coated, the diameter of the coating pattern formed on the surface to be coated can be reduced.

However, since the coating particles flying from the atomizing head toward the surface to be coated have a velocity component in the direction perpendicular to the front direction of the atomizing head due to the centrifugal force based on the high speed rotation of the atomizing head, The flow of the coating particles toward the coating surface increases in diameter as it moves away from the atomizing head and approaches the surface to be coated.

Therefore, in order to reduce the velocity component in the direction orthogonal to the front direction of the atomizing head that the coating particles have, reduce the number of revolutions of the atomizing head or the diameter of the atomizing head, and apply centrifugal force based on the rotation of the atomizing head. Although it can be reduced, it is difficult to reduce the centrifugal force based on the rotation of the atomizing head because the atomization performance of the paint is reduced when the centrifugal force based on the rotation of the atomizing head is reduced.

Therefore, in the rotary atomization type coating device, it is difficult to reduce the diameter of the coating pattern due to the function of rotary atomization.

<Points of Interest for Solving the Problems> In the rotary atomization type coating device, as described above, there is a limit to reducing the diameter of the coating pattern due to the function of rotary atomization. When atomizing the paint, we examined a method that does not give a velocity component in the direction perpendicular to the surface to be coated to the atomized coating particles,
I came up with a method of air atomization in which paint is atomized by air ejected toward the surface to be coated.

In the air atomization type coating device, the air sprayed toward the surface to be coated is used to atomize the paint, so a coating pattern with a diameter smaller than the minimum diameter of the coating pattern in the rotary atomization type coating device is obtained. You can

Therefore, when an air atomization mechanism is incorporated in a rotary atomization type coating device and when coating a surface to be coated that is smaller than the minimum diameter of the coating pattern by rotary atomization, air atomization is performed instead of rotary atomization. It was conceived to obtain a coating pattern with a diameter smaller than the minimum diameter of the coating pattern due to the optimization.

<Means for Solving the Problems> According to the present invention, the atomizing head is configured to rotate about its longitudinal axis, and a paint outlet is provided inside a center hole opened on the front surface of the atomizing head. The peripheral surface of the center hole of the atomizing head is formed on the paint flow surface, the opening edge of the center hole on the front surface of the atomizing head is formed on the paint discharge part, and the paint ejected from the paint ejection port is the paint flow surface of the atomizing head. It is a rotary atomizing type coating device configured to flow and radiate as paint particles from the paint discharge part of the atomizing head, and the air ejection port is opened in the front direction of the atomizing head. The ejected air is installed at a position that crosses the paint ejection path from the paint ejection port to the paint flow surface of the atomizing head, and when air is ejected from the air ejection port, the air atomizes the paint ejected from the paint ejection port. It is characterized in that it is made to atomize while bending in front of the head and to convey the paint particles in front of the atomizing head. That is a rotary atomizing type coating apparatus.

<Operation> In the rotary atomization type coating apparatus of the present invention, when the atomizing head is rotated and the paint is ejected from the paint ejection port without ejecting the air from the air ejection port, it is ejected from the paint ejection port. The paint flows on the paint flow surface of the rotating atomizing head and is emitted as paint particles from the paint discharging portion of the atomizing head. That is, rotary atomization is performed to obtain a coating pattern having a large diameter.

Then, when air is ejected from the air ejection port, the air ejects the paint ejected from the paint ejection port toward the front of the atomizing head, atomizes the paint, and conveys the coating particles in front of the atomizing head. That is, air atomization is performed to obtain a coating pattern having a small diameter.

<Effects of the Invention> In the rotary atomization type coating apparatus of the present invention, a coating pattern having a large diameter is obtained by rotary atomization unless air is jetted from the air jet port, and when air is jetted from the air jet port, Since a coating pattern having a small diameter can be obtained by atomization, the adjustment range of the coating pattern is wide and the minimum diameter of the coating pattern is small.

Therefore, the minimum diameter of the coating pattern is large when alternately coating a wide coating surface and a narrow coating surface in succession, or when continuously coating a strip-shaped coating surface having a narrow portion and a wide portion. Unlike conventional rotary atomization type coating equipment, when painting a narrow coating surface or a narrow portion of a strip-shaped coating surface, the coating pattern is set to a narrow coating portion or a narrow portion of the strip-shaped coating surface. The diameter can be reduced to match

That is, the paint is not wasted and the paint consumption does not increase.

<First Embodiment (see FIGS. 1 and 2)> The rotary atomization type coating apparatus according to the present embodiment, as shown in FIG.
The air turbo motor 2 of the high-speed rotation drive device is concentrically arranged in the cylindrical case 1, the front surface of the air turbo motor 2 is slightly projected from the front opening of the case 1, and the air turbo motor 2 is fixed to the case 1. are doing.

As shown in FIG. 1, the latter half of a cylindrical atomizing head 4 is concentrically fitted and screwed onto the outer peripheral surface of a hollow rotating shaft 3 protruding from the front of the air turbo motor 2. Then, the front half portion of the atomizing head 4 in the shape of a widened conical cylinder is arranged in front of the rotating shaft 3 of the air turbo motor 2, and the atomizing head 4 is concentrically attached to the rotating shaft 3 of the air turbo motor 2. ing.

In the center hole of the rotary shaft 3 of the air turbo motor 2, as shown in FIGS. 1 and 2, a paint supply pipe 5 is concentrically arranged, and the closed front end of the paint supply pipe 5 is atomized. 4 is provided in the front half of the central hole, and four paint ejection ports 6 are provided at equal intervals on the peripheral wall at the closed front end of the paint supply pipe 5, and each paint ejection port 6
Is opened toward the inner peripheral surface of the front half of the atomizing head 4.

Although not shown, the paint supply pipe 5 is fixed to the case 1 and is connected to the paint supply device via a flow rate adjusting valve.

The front conical inner peripheral surface of the front half of the atomizing head 4 is formed on the paint flow surface 7, and the front opening edge of the atomizing head 4 is formed by the paint discharging part 8
Is formed.

That is, the paint ejected from each paint ejection port 6 flows in a thin film on the paint flow surface 7 on the inner peripheral surface of the atomizing head which is rotating, and becomes the coating particles from the paint discharge portion 8 at the front end of the atomizing head. It is configured to be emitted.

The atomizing head 4 and the surface to be painted (not shown) arranged in front of the atomizing head 4 are respectively connected to a DC high voltage generator (not shown).

As shown in FIGS. 1 and 2, an air supply pipe 9 is fitted around the outer periphery of the paint supply pipe 5 in the central hole of the rotary shaft 3 of the air turbo motor 2 and arranged concentrically. The air supply passage 10 is formed between the inner peripheral surface of the supply pipe 9 and the outer peripheral surface of the paint supply pipe 5, and the annular front end opening of the air supply passage 10 is connected to the paint supply pipe 5.
Is arranged at the rear side position of each paint spray port 6 and opens forward of the atomizing head 4 to form an air spray port 11 for spraying paint.

That is, the air spray port 11 for stopping the spray of paint is opened forward of the spray head 4, and the spray air for spraying the spray from the spray port 6 of the spray supply pipe 5 is sprayed from the spray head 4 to the spray head 4. It is provided at a position where it crosses the paint jet passage reaching the paint flow surface 7.

Although not shown, the air supply pipe 9 is fixed to the case 1, and the air supply passage 10 is connected to the high-pressure air supply device via an opening / closing valve and a flow rate adjusting valve.

When air is ejected from the paint atomizing air ejection port 11, the paint atomizing air atomizes the paint ejected from each paint ejection port 6 while bending it toward the front of the atomization head 4 to form fine particles. The atomized coating particles are conveyed in front of the atomizing head 4.

Further, as shown in FIG. 1, an outer member 12 having a substantially conical cylindrical shape is concentrically connected and fixed to the front opening edge of the case 1, and a substantially cylindrical inner member is provided inside the outer member 12. An air passage 14 is formed between the outer member 12 and the inner member 13 by loosely fitting and fixing 13 in a concentric manner.

The annular front end opening of the air passage 14 is concentrically arranged at the outer periphery of the atomizing head 4 as shown in FIG.
Is opened toward the paint discharge part 8 and is formed in the air jet port 15 for adjusting the coating pattern.

That is, the air ejected from the air outlet 15 for adjusting the coating pattern causes the atomizing head 4 to move from the paint ejecting portion 8 of the atomizing head 4.
The coating particles radiated in the radial direction are bent in front of the atomizing head 4.

At the rear end of the air passage 14 having the air outlet 15 for adjusting the coating pattern formed at the front end, as shown in FIG.
And an air passage 16 formed between the air turbo motor 2 and the air turbo motor 2.

Although not shown, the air passage 16 connected to the air outlet 15 for adjusting the coating pattern is configured to be connected to the high-pressure air supply device via a flow rate adjusting valve, and the flow rate adjusting valve increases and decreases the flow rate of the air for adjusting the coating pattern. Then, the diameter of the coating pattern is increased or decreased.

The maximum rotation speed of the atomizing head 4 is 70,000 rpm.
The diameter of the paint discharging part 8 of the atomizing head 4 is 25 mm. The diameter of each paint ejection port 6 is the same and is 0.8 mm. The outer diameter and the inner diameter of the air jet 11 for atomizing the paint are 3.5 mm and 3.0 mm. The distance between the air jet 11 for atomizing the paint and each paint jet 6 is 3 mm.

When the rotary atomizing type coating device of this example is driven, the atomizing head 4 rotates at high speed by the rotational driving of the air turbo motor 2, while the space between the atomizing head 4 and a surface to be coated (not shown) arranged in front of it. DC high voltage is applied to the coating material, and air is ejected from the air outlet 15 for adjusting the coating pattern.
Paint squirts out from.

When the air is not jetted from the paint atomizing air jet 11, the paint jetted from each paint jet 6 reaches the paint flow surface 7 of the rotating atomizing head 4 and By the centrifugal force based on the rotation, the paint flowing surface 7 of the atomizing head 4 is made to flow in a thin film form, and is radiated from the paint discharging portion 8 of the atomizing head 4 as coating particles in the radial direction, and the rotary atomization is performed. Done.

The coating particles radiated in the radial direction from the coating material discharge portion 8 of the atomizing head 4 are the force of the air jetted from the air jet port 15 for adjusting the coating pattern and the electrostatic force acting between the coating particles and the surface to be coated. Due to the attractive force, the flying direction is bent forward of the atomizing head 4, and the flying head flies toward the surface to be coated and adheres to the surface to be coated to form a coating pattern.

When adjusting the diameter of the coating pattern, the flow rate adjusting valve adjusts the flow rate of the air ejected from the air outlet 15 for adjusting the coating pattern.

When the spray distance between the paint discharge part 8 of the atomizing head 4 and the surface to be coated is about 15 cm, the coating pattern is a ring with an outer diameter of about 60 cm when the flow rate of the coating pattern adjusting air is zero. When the flow rate of the air for adjusting the coating pattern is 250 Nl / min, the shape becomes a solid circle with a diameter of about 15 cm.

However, the flow rate of air for adjusting the coating pattern was 250 Nl / mi.
Even if it is increased from n, it is difficult to reduce the diameter of the coating pattern to less than about 15 cm.

That is, when the spray distance is about 15 cm, the minimum diameter of the coating pattern by rotary atomization is about 15 cm.

On the other hand, when air is ejected from the paint atomizing air ejection port 11, the paint atomizing air is supplied before the paint ejected from each paint ejecting port 6 reaches the paint flowing surface 7 of the atomizing head 4. To
The paint ejected from each paint ejection port 6 is bent toward the front of the atomizing head 4 and atomized to perform air atomization.

The coating particles atomized by the paint atomizing air fly toward the surface to be coated and adhere to the surface to be coated to form a coating pattern.

The diameter of the coating pattern due to this air atomization is increased or decreased by adjusting the flow rate of the paint atomizing air.

When the spray distance between the paint discharge part 8 of the atomizing head 4 and the surface to be painted is about 15 cm, the coating pattern is about 10 cm in diameter when the flow rate of paint atomizing air is 150 Nl / min. When the flow rate of paint atomizing air is 300 Nl / min, the diameter becomes a solid circle with a diameter of approximately 5 cm, which is the minimum diameter.

That is, when the spray distance is about 15 cm, the minimum diameter of the coating pattern by air atomization is about 5 cm, which is one third of the minimum shape of the coating pattern by rotary atomization.

After all, when air is ejected from the air ejection port 11 for atomizing the paint during the rotation atomization, the large-diameter coating pattern by the rotary atomization is switched to the small-diameter coating pattern by the air atomization.

Further, when the air ejected from the air atomizing port 11 for paint atomization is stopped, the coating pattern of small diameter by air atomization is switched to the coating pattern of large diameter by rotary atomization.

Therefore, in the rotary atomizing type coating apparatus of this example, when a wide coating surface and a narrow coating surface are alternately coated continuously, or a strip-shaped coating surface having a narrow portion and a wide portion is continuously coated. When painting a wide coating surface or a wide portion of a strip-shaped coating surface, rotary atomization is performed without ejecting air from the air nozzle 11 for paint atomization, and the coating pattern is wide. Use a large diameter that matches the wide part of the coated surface or strip-shaped coated surface.

Next, when painting a narrow coating surface or a narrow portion of a strip-shaped coating surface, air is sprayed from the air atomizing port 11 for atomization of the paint to perform air atomization, and the coating pattern is narrow. Reduce to a small diameter that matches the narrow part of the surface or strip-shaped surface to be coated.

In the rotary atomization type coating apparatus of this example, since the air jet port 11 for atomizing the paint is arranged concentrically with the atomization head 4,
The coating pattern formed on the surface to be coated by the air atomization is concentric with the atomizing head 4 like the coating pattern formed on the surface to be coated by the rotary atomization.

Therefore, it is easy to determine the arrangement position of the atomizing head 4 and the surface to be painted, and it is easy to teach the movement trajectory of the atomizing head 4 to the coating robot.

In addition, in the rotary atomizing type coating apparatus of this example, while the air is jetted from the air jet 11 for paint atomization to atomize the air to form a small-diameter coating pattern, the paint is jetted from the paint jet 6 If the flow rate of the paint to be reduced is reduced at a rate according to the area ratio of the small-diameter coating pattern by air atomization to the large-diameter coating pattern by rotary atomization, the coating thickness of the small-diameter coating pattern by air atomization will be , It is almost the same as the coating thickness of large-diameter coating pattern by rotary atomization.

<Second embodiment (see FIGS. 3 and 4)> The rotary atomizing type coating apparatus of this example is different from the preceding example in that the configurations of the paint supply pipe 5 and the air supply pipe 9 in the previous example are changed. Is.

An air supply pipe 21 is concentrically arranged in the center hole of the rotary shaft 3 of the air turbo motor 2 as shown in FIGS. 3 and 4.

As shown in FIG. 3 and FIG. 4, the front end opening of the air supply pipe 21 is arranged in the center of the center hole of the atomizing head 4, and is opened in the front direction of the atomizing head 4 to atomize the paint. It is formed in the air ejection port 22 for.

Further, in the center hole of the rotary shaft 3 of the air turbo motor 2,
As shown in FIGS. 3 and 4, the paint supply pipe 23 is arranged in parallel with the air supply pipe 21, and the front end of the paint supply pipe 23 is connected to the air supply pipe.
Curved to the front of the front edge of 21.

As shown in FIG. 3 and FIG. 4, the front end opening of the paint supply pipe 23 is arranged on the front side of the paint atomizing air ejection port 22 of the air supply pipe 21, and is located on the inner peripheral surface of the front half of the atomizing head 4. An opening is formed toward the paint flow surface 7, and the paint jet 24 is formed.

That is, the air atomizing port 22 for atomizing the paint is opened to the front of the atomizing head 4, and the air for atomizing the paint ejected from this is sprayed from the paint outlet 24 of the paint supply pipe 23 to the paint of the atomizing head 4. Flow surface 7
It is installed at a position that crosses the paint ejection path leading to.

The diameter of the paint discharge part 8 of the atomizing head 4 is 25 mm.
The paint outlet 24 has a diameter of 0.8 mm, and the paint atomizing air outlet 22 has a diameter of 1 mm. The distance between the air outlet 22 for atomizing the paint and the paint outlet 24 is 3 mm.

 Other points are the same as in the previous example.

In FIGS. 3 and 4, the same parts as those in the previous example are designated by the same reference numerals.

<Third embodiment (see FIG. 5)> The rotary atomizing type coating apparatus of this embodiment is different from that of the first embodiment in that the method of forming the air supply passage 10 in the first embodiment is changed. .

As shown in FIG. 5, the central hole of the rotary shaft 3 of the air turbo motor 2 is formed to have a small diameter, and is arranged at the peripheral surface of the central hole of the rotary shaft 3 and the axial center position of the central hole of the rotary shaft 3. An air supply passage 25 is formed between the outer peripheral surface of the paint supply pipe 5.

The paint supply pipe 5 may be fixed to the case 1 as in the first embodiment, or the air turbo motor 2 may be used.
The rotary shaft 3 may be fixed to the rotary shaft 3 and rotated together with the rotary shaft 3 and the atomizing head 4.

 The other points are the same as in the first embodiment.

In FIG. 5, the same parts as those in the first embodiment are designated by the same reference numerals.

<Fourth Embodiment (see FIG. 6)> The rotary atomizing type coating apparatus of this embodiment is different from that of the first embodiment in that the fixing method of the air supply pipe 9 in the first embodiment is changed. .

As shown in FIG. 6, a bar 26 is provided around the center of the center hole of the atomizing head 4, and the front end of the air supply pipe 9 is inserted into and fitted to the bar 26. 9 is fixed to the atomizing head 4 and is configured to rotate together with the atomizing head 4.

The paint supply pipe 5 may be fixed to the case 1 as in the first embodiment, or may be fixed to the atomizing head 4 or the rotary shaft 3 of the air turbo motor 2 to fix the atomizing head 4. Alternatively, it may be configured to rotate together with the rotary shaft 3.

 The other points are the same as in the first embodiment.

In FIG. 6, the same parts as those in the first embodiment are designated by the same reference numerals.

<Fifth Embodiment (see FIG. 7)> The rotary atomization type coating apparatus of this embodiment can move the paint supply pipe 5 and the air supply pipe 9 in the first embodiment back and forth as compared with that of the first embodiment. It has been changed to.

A paint supply pipe 5 and an air supply pipe 9 arranged concentrically in the center hole of the rotary shaft 3 of the air turbo motor 2 and the center hole of the atomizing head 4.
Is configured to move back and forth as a unit, and when air is jetted from the air jet port 11 for paint atomization to perform atomization, the paint supply pipe 5 and the air supply pipe 9 are connected as shown in FIG. The paint spray ports 6 and the paint spraying air spray ports 11 arranged in the central hole of the atomizing head 4 are projected forward of the atomizing head 4 as a unit.

Then, in this protruding state, the air ejection port 11 for atomizing the paint
The paint ejected from each paint ejection port 6 is bent toward the front of the atomizing head 4 and atomized by the air ejected from the air, thereby atomizing the paint.

Then, the air-atomized coating particles are not affected by the air turbulence due to the rotation of the atomizing head 4 when flying toward the surface to be coated, so the diameter of the coating pattern formed on the surface to be coated is In comparison with the case of the first embodiment, which is affected by the turbulence of air due to the rotation of the atomizing head 4, it is slightly smaller.

 The other points are the same as in the first embodiment.

In FIG. 7, the same parts as those in the first embodiment are designated by the same reference numerals.

<Modification> In each of the above-described embodiments, the spray nozzles 6 and 24 are used as the atomizing head 4.
Similarly to the above, the configuration is such that it is connected to the DC high voltage generator.

Then, when air is ejected from the paint atomizing air ejection ports 11 and 22 to atomize the air, the coating efficiency is increased.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of the rotary atomizing type coating apparatus according to the first embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a partially longitudinal side view of the rotary atomizing type coating apparatus of the second embodiment. FIG. 4 is a front view of the device. FIG. 5 is a partially longitudinal side view of the rotary atomizing type coating apparatus of the third embodiment. FIG. 6 is a partially longitudinal side view of the rotary atomizing type coating apparatus of the fourth embodiment. FIG. 7 is a partially longitudinal side view of the rotary atomizing type coating apparatus of the fifth embodiment, showing a state in which air atomization is performed. 4: Atomization head, 6: Paint jet 7: Paint flow surface, 8: Paint discharge part 11: Paint atomization air jet 22: Paint atomization air jet 24: Paint jet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shoichi Suzuki, Shoichi Suzuki, Aichi-gun, Nagakute-cho, Aichi-gun, No. 41 Yokomichi Yokoido 1 1st at Toyota Central Research Laboratory Co., Ltd. (72) Inventor Masao Aoyama Nomura, Taura-cho, Yokosuka-shi, Kanagawa Kanto Automobile Industry Co., Ltd. (72) Inventor Tadao Nakabayashi Nobunchi, Tauraminato Town, Yokosuka City, Kanagawa Kanto Automobile Industry Co., Ltd. (72) Inventor Naoki Shinmei, Nobunta Tauraminato Town, Yokosuka City, Kanagawa Prefecture Kanto Automobile Industry Co., Ltd. (56) References JP-A-60-87869 (JP, A) JP-A-57-50568 (JP, A)

Claims (1)

(57) [Claims] 1. An atomizing head is configured to rotate about its longitudinal axis, a paint outlet is provided inside a center hole opened in the front surface of the atomizing head, and a circumference of the center hole of the atomizing head is provided. Surface is formed as the paint flow surface, the center hole opening edge of the front of the atomization head is formed as the paint discharge part, and the paint ejected from the paint jet flows along the paint flow surface of the atomization head A rotary atomization type coating device configured to be discharged as paint particles from a paint discharge part, in which an air jet is opened toward the front of the atomizing head, and the air ejected from this is discharged from the paint jet. It is installed at a position that crosses the paint ejection path leading to the paint flow surface of the atomizing head, and when air is ejected from the air ejection port, the air that is ejected from the paint ejection port bends toward the front of the atomization head. A rotary atomizing type coating device characterized in that it is atomized and the coated particles are conveyed in front of the atomizing head.