EP2576079A1

EP2576079A1 - Nozzle head for a spray device

Info

Publication number: EP2576079A1
Application number: EP11723182.9A
Authority: EP
Inventors: Ewald Schmon; Peter Dettlaff
Original assignee: SATA GmbH and Co KG
Current assignee: SATA GmbH and Co KG
Priority date: 2010-05-28
Filing date: 2011-05-21
Publication date: 2013-04-10
Anticipated expiration: 2031-05-21
Also published as: AU2011257605A1; JP2013537470A; AU2011257605B2; DE202010007355U1; US9782784B2; JP2016052660A; CN102917803A; WO2011147555A1; JP6162267B2; JP5875580B2; US20130056556A1; CN106925462A; CA2797990C; EP2576079B1; CA2797990A1

Abstract

The invention relates to a nozzle head for a spray device, comprising a central material nozzle, an air ring nozzle surrounding said material nozzle, and preferably at least two laterally projecting horns, into each of which at least one horn air nozzle is incorporated, and optionally comprising a material-conducting needle, characterised in that at least one nozzle (3, 3a, 3b, 5, 5a, 12, 12a, 12b, 15, 16, 17, 17a, 17b, 17c,18, 18a, 18b1, 18b2, 18b3, 300a, 300b), preferably at least one horn air nozzle (15, 16, 17, 17a, 17b, 17c, 18, 18a, 18b1, 18b2, 18b3, 300a), has a non-cylindrical shape.

Description

NOZZLE HEAD FOR A SPRAYER

description

The invention relates to a nozzle head for a spray device according to the preamble of claim 1.

Such nozzle heads are common to spray devices for hydrostatic, pneumatic or combined hydrostatic and pneumatic atomization of paint, paint, glue or other liquid substances, in particular paint spray guns.

In the nozzle heads of such spraying devices, the air ring nozzle has the function of allowing the compressed air supplied to the device to emerge as a high-energy jet of air sucking, atomizing and discharging material from another central nozzle

forms material-prone spray jet. In laterally arranged, forward in

Horn air nozzles pointing spray jet direction horns are usually directed obliquely and in the same direction to the outflow direction of the spray jet, so that the air jets emerging from these nozzles can deform or shape the spray jet. Due to the lateral deformation / shaping arises depending on the

Flow energy (amount of air, air pressure, flow velocity, etc.) A more or less large flat jet or a flat and round jet.

To achieve an optimal work result, the spray jet u.a. be adjusted in terms of beam width, material distribution, material type and drop size. The adaptation takes place depending on the physical boundary conditions

(Input air pressure, amount of air, etc.) essentially by constructive adjustment of the mouth of the central air ring nozzle and the Hornluftdüsen. For sufficiently homogeneous spray steels usually one, two, three or more horn air nozzles are used per horn, which interact with the central mouth of the central nozzle. From practice paint spray guns with one, two or more Hornluftdüsen are known, which ensure sufficient beam shaping and atomization on the criteria of mutual distance, diameter, angle and distance to the paint nozzle mouth, and their number. The Hornluftdüsen are in an air cap

provided, fixed on the spray gun body, mostly by means of

Attachment rings is screwed on. The central air nozzle can also be screwed, clipped or otherwise fastened directly onto the paint nozzle or onto the paint spray gun body. Such a nozzle head is for example from German Utility Model G 90 01 265.8 known. The color nozzle openings and the Hornluftdüsenöffnungen are designed as commonly used as round holes.

In practice, the diameter of the Hornluftdüsen be made different sizes depending on the inlet pressure and the individually desired shape of the spray jet. The effect of the individual horn air nozzles depends on the inlet pressure. At higher input pressures, the beam may split. If the input pressures are too low, unwanted coarsening with small beam width may occur. There is also a large dependence of material throughput and other material properties (e.g., viscosity, rheology, etc.), inlet pressure, and horn air nozzle placement. Occasionally when using one or more smaller horn air nozzles or unfavorable bore angles, problems arise with back mist on the mouth surfaces of the nozzles due to the suction effect at smaller nozzle or

Bore diameters.

In general, around the central nozzle in addition small control openings or

Hilfszerstäuberöffnungen arranged, which contribute to beam shaping and atomization. In order to convert the jet preformed from the cylindrical tube of the central air nozzle opening into another form, for example to convert an omnidirectional jet into a flat jet, there are high amounts of energy from the jet bores and

Horn holes necessary, which lead to high energy losses and the

Restrict beam shaping.

A major drawback of this method of beam shaping is that much of the energy used for beam forming and post-atomization already evaporates through the narrow holes and multiple exits to the ambient air (large shear surfaces at the surface in connection with large speed differences).

Often modified nozzle heads with possibly different spray parameters and geometries must be used for slightly different color or paint materials in order to obtain a perfect spray pattern and thus the desired color, paint or other material application result. The object of the invention is to improve a nozzle head so that the

Flow energy of the compressed air can be optimally implemented in beam shaping, flow rate and thus in atomization work.

This object is achieved by a nozzle head having the features of claim 1. By shaping the central jet by means of at least one non-cylindrical nozzle, in particular at least one non-cylindrical horn air nozzle, it is also possible to save considerable amounts of energy for beam shaping.

The invention is based on the fact that in cylindrical nozzles the necessary

Adaptation to the individual requirements only by variations of the

Diameter dimensions, the length and the inclination of the cylindrical holes, their mutual distance and the distance to the other nozzle openings is possible. Non-cylindrical nozzles can be more easily optimized in terms of flow and adapted to the individual task.

It goes without saying that while the inner shape, in particular the mouth of the nozzle should be non-cylindrical. The outer shape of the nozzles is usually negligible for beam forming.

Advantageous embodiments of the invention are specified in the remaining claims.

In a development of the invention, a variable design of the control bores is proposed in order to achieve efficient beam shaping.

The same applies to the shaping of the flow areas of the air nozzle. As a result, the round jet can be preformed by a special shaping so that less horn air is required for the shaping of the broad jet and any desired beam shapes can be achieved.

In particular, elliptical or at least approximately slot-shaped nozzles are recommended in cross-section.

By extending in the direction of the spray jet nozzle opening of the

Atomization process can be further improved. Also, grooves, slats, air vanes or the like may be provided for air conduction in the nozzle openings.

The non-cylindrical nozzles can be made in metal parts by machining. The non-cylindrical nozzles made of plastic, in particular of an injection-moldable plastic, can be produced in a particularly simple manner. It is also possible to use such nozzles in plastic inserts and fasten in metal nozzle heads.

Also, thanks to the combination of cylindrical, conical and others

non-cylindrical nozzle openings further advantageous effects can be achieved.

Further advantageous details and embodiments of the invention are in the

illustrated below figures.

Showing:

1 shows a section through a first exemplary embodiment of a nozzle head, FIG. 2 shows a plan view of a partial region of the nozzle head according to FIG. 1, FIG. 3 shows a variant of FIG. 2,

4 to 8 and 11 to 14 are each a plan view of various variants of a portion of a nozzle head,

9 and 10 are each a sectional view of a nozzle head, and

Fig. 15 is an exploded view of another nozzle head.

The nozzle head shown in Fig. 1 and 2 for a paint spray gun has a

Farbdüsenkorper 1 with a substantially cylindrical color channel 2, the centrally in a paint nozzle 3 opens. In the paint nozzle 3, a hollow paint needle 4 is inserted. The paint nozzle 3 is surrounded by an air ring nozzle 5, the air can be supplied via channels 6. On the gun body is an air cap 7 by means of a ring 203, the

Usually referred to as air nozzle ring, screwed. The air cap 7 could also be otherwise attached to the gun body. In the present

Embodiment is the air cap 7 is injection molded from a plastic. It has an annular portion 8 which fits fittingly on the gun body. The annular section 8 is followed by a substantially flat cover plate 9. In a so-called mouth region, the cover plate 9 has a projecting over this flat region 9 annular elevation 10, in which an opening 1 1 is recessed centrally. The opening 1 1 extends when the paint nozzle 3 is mounted to this and thus around the air ring nozzle 5 around. In the cover plate 9 side of the opening 1 1 at several points continuous control nozzles or control openings 12 are provided. The

Control nozzle openings 12 are aligned at an angle of about 20 degrees to the spray jet direction 100 out. At two opposite points, the air cap 7 has a respective horn 13 or 14, which extends forward in the spray direction 100. In the present embodiment, the horns 13, 14 as in cross section

formed rectangular, closed at the top body. Each horn 13, 14 has two jet air nozzles 15, 16 or 17, 18 which are arranged one behind the other in the direction of spray jet 100 and extend through the inner wall 19 of the horns 13, 14. The Hornluftdüsen 15,16,17,18 are aligned obliquely in the direction of the spray jet 100. In the present case, the two Hornluftdüsen 15, 16 and 17, 18 of each horn 13 and 14 extend substantially parallel to each other at an angle 101 of about 140 degrees

Spray jet direction 100. The Hornluftdüsen 15, 16 could also be aligned at an angle to each other or against each other. You can over each one in

Longitudinally through the horn 13 and 14 extending air duct 20 and 21 are supplied with compressed air. The ring air jet emerging with high energy from the air ring nozzle 5 sucks the paint out of the paint nozzle 3, whereby an omnidirectional jet forms, which in

Spray jet direction 100 flows. The from the Hornluftdüsen 15, 16 and 17, 18th

exiting horn air jets are directed to the round jet and flow obliquely and in the same direction to the spray jet direction 100 and deform the round jet to the desired broad jet.

The Hornluftdüsen 15, 16 and 17, 18 are fluidically optimized so that the omnidirectional experiences a homogeneous beam shaping and achieves the desired beam width without splitting the spray jet. As shown in FIG. 2, both Hornluftdüsen 17, 18 of the horn 14 in cross section are elliptical and of equal size. In the present

Embodiment are the narrow curves of the ellipses above or below. However, the ellipses could also be arranged transversely to the longitudinal extension of the horn 14 or 13. Combinations of such ellipses are also possible. This special design of the Hornluftdüsen 17, 18 could be easily realized by injection molding the air cap 7. It is not absolutely necessary to provide a separate air cap 7; the nozzle head 1 could also be designed differently (in one piece). Essential in the context of the invention are the non-cylindrical nozzles in the nozzle head.

In the present embodiment, the paint needle 4 is hollow and has a cylindrical opening 4a along its longitudinal axis, through which a vacuum or an overpressure in the spray jet can be generated. In a particular variant, a further paint component is injected into the spray jet via the hollow needle 4. For this purpose, the

Inlet opening of the needle 4 connected to corresponding material-containing devices. In a particular embodiment, the opening 4a may be non-cylindrical, e.g. be oval in cross section or in any other non-cylindrical shape.

The opening 4a may be connected to compressed air or vacuum.

On the other hand, the color needle 4 could not be hollow, but formed of solid body. The needle 4 is advantageously always designed so that its outer shape at the sealing point or contact surface on the paint nozzle 3 corresponds to the inner shape of this nozzle, so that sealing pairings are achieved.

In the variant according to FIG. 3, the one coming first in the spray-jet direction 100 is

Hornluftdüse 17 elliptical in cross-section, while the then coming Hornluftdüse 18 a is square in cross-section. A rectangular shape is also possible. The Hornluftdüse 18 a is smaller here than the Hornluftdüse 17. In this embodiment, no control openings are present. But they could also be provided here. The same applies to the following

Embodiments. In Fig. 4, an air cap 7 is indicated for a nozzle head, in which only a single Hornluftdüse 17 a per horn is provided. This Hornluftdüse 17a is teardrop-shaped oval, wherein in plan view of the inner wall 19 of the horn 14, the greater rounding of the oval in the upper region of the horn 14 is arranged.

In the variant shown in Fig. 5, only a single Hornluftdüse 17b per horn is also provided. Here, the shape of the Hornluftdüse 17 b is designed such that in plan view of the inner wall 19 of the horn 14 about the outline of the number 8 is visible.

In Fig. 6 is a similar variant as shown in Fig. 5. In the air cap 7 is the

Horn air nozzle 17 b of FIG. 5 is here quasi divided longitudinally into a two-part

Horn air nozzle 17c. The two parts of the Hornluftdüse 17c are approximately crescent-shaped. In the illustrated embodiment, the curves are directed outwards. A reverse arrangement is also possible. It is also possible to align the curves of the crescents up or down

In the variant according to FIG. 6a, three horn air nozzles 18b1, 18b2, 18b3 which are rectangular in cross-section are provided in the horn 14 of the air cap 7.

The Hornluftdüsen described so far have everywhere the same internal dimension in the longitudinal direction. But it can also be used Hornluftdüsen that expand or rejuvenate in the longitudinal direction.

FIG. 7 shows a variant in which an elliptical horn-shaped air nozzle 17d, which is elliptical in plan view, extends upwardly in the longitudinal direction through the inner wall 19 of the horn 14

Extended longitudinally. The flow surface 22 of the Hornluftdüse 17d is smooth.

The flow surface 22 of the Hornluftdüse 17 d or another Hornluftdüse could also be wavy, knobbed, grooved, spiral or otherwise designed.

In the variant according to FIG. 8, the same horn-air nozzle 17a as in FIG. 4 is provided on the air cap 7. Here, the Hornluftdüse 17 a but has not been made together with the air cap 7, but recessed as a continuous opening of a plastic body 23 in a through opening in the inner wall 19 of the horn 14th accurately inserted, in particular clipped. In the present case, the insert is rectangular in shape - like the opening in the inner wall 19 of the horn 14. The insert and the opening for the Hornluftdüse 17a or another Hornluftdüse may of course be designed differently; For the function of the nozzle head according to the invention, these details do not play a major role. Such shaped openings for receiving nozzles can not only plastic air caps, but

In principle, even with air caps made of metal such as steel (for example, manganese steel) can be easily manufactured.

The insert 23 could also be glued into the opening in the side wall 19 of the horn 14.

In Fig. 9, a variant of Fig. 1 is shown in the upper half; the same components are provided with the same reference numerals. 1, the two horn air nozzles 15, 16 of the horn 13 extend at different angles to the spray jet direction 100. The angle 102 in the horn air nozzle 15 is approximately 130 degrees, while the angle 103 in the horn air nozzle 16 is approximately 120 degrees.

Fig. 9 shows in the lower half of the sectional view of a variant of a portion of the variant of Fig. 4. Here it is clearly seen that the flow surface 22 of the

Horn air nozzle 17a in height of the Hornluftdüse 17a or in the spray direction 100 is smooth.

FIG. 10 shows a variant of FIG. 8 and FIG. 4. Here it can be clearly seen that the flow surface 22 of the horn-shaped air nozzle 17a can also be transversely corrugated in the vertical extent of this horn-shaped air nozzle 17a and can have a multiplicity of flow-guiding grooves 24 for the horn air. In another embodiment, the grooves 24 may be configured as longitudinal grooves. Furthermore, here also control openings or

Control nozzle openings 12, 12 a provided. The control nozzle openings 12, 12 a are aligned at an angle to the spray jet direction 100 out. Some control openings or control nozzle openings 12 a, which are provided in the cover plate 9 of the air cap 7, not cylindrical as usual, but with a 100 in the spray jet direction conical

designed expanding diameter. In plan view, the control nozzle openings 12a are designed approximately crescent-shaped, as shown in FIG. 1 1 shows. The inner rounding of each crescent 12 points in this case to the air-ring nozzle 5 or to the ink nozzle opening 3. One, two or more control nozzle openings per side can be made in any desired cross-sections; the Invention is not limited to the number of control nozzle openings. In the present embodiment, four control nozzle openings 12 and 12 a are provided, which are provided in pairs in areas of the cover plate 9 of the air nozzle 7, which are adjacent to the horns 12, 13. In each case, a cylindrical control nozzle opening 12 lies next to a non-cylindrical control nozzle opening 12a. However, it is also possible to provide only non-cylindrical or only cylindrical control nozzle openings.

Instead of the transverse grooves 24 or longitudinal grooves and lamellae, knobs or the like could be provided.

In the variant according to FIG. 12, only two control openings are used instead of four control openings

Control openings 12b provided, which are even more irregular than in the previous

are formed described embodiments. They have namely in plan view or in the outline approximately the shape of a trifoliate cloverleaf. The two control openings 12b are next to the horns 13, 14 on the cover plate 9 of the air cap 7 next to the

Color nozzle 3 and the Luftringdüse 5 is provided.

With the above-described cross-sectional shapes of the Hornluftdüsen special, aerodynamically optimized channels for the horn air are created. Of course, other cross-sectional shapes and combinations thereof are possible.

In Fig. 13, a variant of an air cap 7 is shown, in which the around the paint nozzle 3 extending around Luftringdüse is not designed as usual cylindrical. The air ring nozzle 5a is here approximately hexagonal in plan view with two peaks 26, 27 formed. The tips 26, 27 are remote from the horns 13, 14, in another embodiment, the tips 26, 27 and the horns 13, 14 may be facing.

FIG. 14 shows another air ring nozzle 5b, which is strictly oval in plan view, in combination with a similarly shaped paint nozzle 3a on an air cap 7 of a nozzle head 1.

In the two last-described variants, the round jet is preformed by the special shaping so that less horn air is required for the shaping of the broad jet than usual. Other configurations of the nozzle head with a different air cap or without air cap are possible; essential for the purposes of the invention are the non-cylindrical openings in the nozzle head.

The nozzle head 1 a shown in Fig. 15 belongs to a high-pressure-fed special gun, which is ideal for processing large quantities of highly viscous materials, because it works with supporting air atomization. The nozzle head 1 a has a so-called air nozzle 200 and a so-called pre-nozzle 201, which engages via a header 202 in the air nozzle 200. These components can be screwed onto the body of the spray gun, not shown, via a so-called air nozzle ring 203. All air or material-carrying openings or nozzles are usually designed cylindrical in such spray guns. From the central nozzle 3b, the material emerges in the form of a flat jet and is then shaped into an omnidirectional jet. It is proposed to make at least one of the openings 300a, 300b or air or material-carrying nozzles with non-cylindrical,

in particular the horn air nozzles 300a. This also special effects can be achieved here.

Any combinations of nozzle variants described are of course possible and can lead to particularly advantageous spattering results.

All combinations of cylindrical and non-cylindrical nozzles are conceivable depending on the desired work result and are within the scope of the present invention.

Of course, the invention is not limited to the previously described nozzle heads. It can also be used with advantage in other nozzle heads.

The proposed non-cylindrical nozzles can of course be particularly easy to produce in nozzle heads or parts of nozzle heads, which are made of plastic, in particular injection-molded. In the case of nozzle heads made wholly or partly of metal (usually stainless steel), non-cylindrical nozzles can be realized by means of lost-wax casting or by means of inserts.

In further embodiments, the air nozzle / air ring nozzle also directly on the

Color nozzle plugged, clipped, screwed or otherwise mounted or attached. The air nozzle and the paint nozzle can also be made in one piece. The entire nozzle device could be connected directly to a gun body with or without additional support means.

In a further embodiment, the nozzle device is directly connected to the

Compressed air network or a material supply connected.

In a further embodiment, the nozzle device can also represent a part of the air or material supply.

Also, the outer shape of the nozzle device may have any geometric shapes in the circumferential direction; In a particular embodiment, the entire spray device may additionally have any desired geometric shapes.

The openings for beam shaping and the Hornluftdüsen or -auslassöffnungen need not necessarily be provided in projecting horns, but can

for example, in the plate 9, side elevations, pipes or in a circulating around the plate ring are arranged.

The number of openings in the horns as well as for beam shaping is basically arbitrary; Multiple openings can also be summarized in segments

For example, opposing areas (90 degrees, 45 degrees, 30 degrees) are arranged. It can be through individual openings, several or many

Openings special beam shapes can be achieved

By the described and further conceivable aerodynamically optimized

Nozzle openings, the energy of the compressed air can be used optimally, the beam formed better and the atomization can be improved. As a result, in addition to finer droplets, the droplet distribution in the jet can also be improved and introduced

more uniform droplet distribution center can be generated. Likewise, the reduction of the beam dependence can be achieved by other parameters, e.g.

Inlet pressure, material viscosity and manufacturing tolerances and a

Volume reduction by reducing the exit velocity and reducing the compressed air requirement.

Claims

claims

1 . Nozzle head for a spray device, with a central material nozzle, an air nozzle surrounding this material nozzle and preferably with at least two laterally protruding horns, in which at least one Hornluftdüse is incorporated, and optionally with a material-carrying needle, characterized in that at least one nozzle (3, 3a, 3b, 5, 5a, 12, 12a, 12b, 15, 16, 17, 17a, 17b, 17c, 18, 18a, 18b1, 18b2, 18b3, 300a, 300b), preferably at least one horn air nozzle (15, 16 , 17, 17a, 17b, 17c, 18, 18a, 18b1, 18b2, 18b3, 300a) has a non-cylindrical shape.

2. Nozzle head according to claim 1, characterized in that the air ring nozzle (5 a, 5 b) has a non-cylindrical shape.

3. Nozzle head according to claim 2, characterized in that a Luftringdüse is combined with non-cylindrical shape with at least one Hornluftdüse having a cylindrical shape.

4. Nozzle head according to one of the preceding claims, characterized in that in addition to the Luftringdüse ((5) at least one control opening (12a, 12b) is provided, which has a non-cylindrical shape.

5. Nozzle head according to one of the preceding claims, characterized in that at least one of the non-cylindrical nozzles (17a) via an insert (23) is fixed to the nozzle head (1).

6. Nozzle head according to one of the preceding claims, characterized in that at least one of the nozzles (17) is elliptical in cross-section.

7. Nozzle head according to one of claims 1 to 5, characterized in that

at least one of the nozzles (17a) is formed drop-shaped-oval in cross-section.

8. Nozzle head according to one of claims 1 to 5, characterized in that

at least one of the nozzles (12a, 17c) is approximately crescent-shaped in cross-section.

9. nozzle head according to one of claims 1 to 5, characterized in that

at least one of the nozzles (17b) in cross-section or in the outline approximately equal to the number 8.

10. Nozzle head according to one of claims 1 to 5, characterized in that at least one of the nozzles (12 b) in cross-section approximately the shape of a three-leaved

Clovers has.

1 1. Nozzle head according to one of claims 1 to 5, characterized in that at least one of the nozzles (18a, 18b1, 18b2, 18b3) in cross section has approximately the shape of a rectangle (18b1, 18b2, 18b3), in particular a square (18a).

12. Nozzle head according to one of the preceding claims, characterized in that the flow surface (22) of at least one of the nozzles (17d) is corrugated, knobbed, grooved, spirally or otherwise designed.

13. Nozzle head according to claim 12, characterized in that at least one of the nozzles (17a) has at least one flow-guiding groove (24).

14. Nozzle head according to claim 13, characterized in that the groove is a longitudinal groove.

15. Nozzle head according to one of the preceding claims, characterized in that at least one horn (13, 14) has only a single Hornluftdüse (17a, 17b).

16. Nozzle head according to one of claims 1 to 14, characterized in that at least one horn (13, 14) has two horn air nozzles (15, 16, 17,17c, 18,18a).

17. Nozzle head according to one of claims 1 to 14, characterized in that at least one horn (14) has three horn air nozzles (18b1, 18b2, 18b3).

18. Nozzle head according to claim 16 or 17, characterized in that the Hornluftdüsen (17,18a) are designed unequal size.

19. Nozzle head according to one of the preceding claims, characterized in that the nozzles (5a, 5b, 12, 12b, 15, 16, 17, 17a, 17b, 18, 18b1, 18b2, 18b3, 300a, 300b) in the longitudinal direction everywhere at least approximately the same internal dimension.

20. Nozzle head according to one of claims 1 to 18, characterized in that the inner dimension of the nozzles (12a) widens or tapers in the longitudinal direction.

21. Nozzle head according to one of the preceding claims, characterized in that a plurality of nozzles (12, 12a, 15, 16, 17, 18, 17c, 18a, 18b1, 18b2, 18b3) are arranged in segments.

22. Nozzle head according to one of the preceding claims, characterized in that the Hornluftdüse or Hornluftdüsen are arranged in areas that no

Horn shape.

23. Nozzle head according to one of the preceding claims, characterized in that at least one of the non-cylindrical nozzles (5a, 5b, 12, 12a, 12b) extends at least approximately in the longitudinal direction of the nozzle head (1).

24. Nozzle head according to one of claims 1 to 22, characterized in that at least one of the non-cylindrical nozzles (15, 16, 17, 17a, 17b, 17c, 18, 18b1, 18b2, 18b3) at least approximately transversely to the longitudinal direction of the nozzle head (1 ) runs.

25. Nozzle head according to one of claims 16 to 23, characterized in that a plurality of nozzles (15, 16) at least approximately at the same angle (101) for

Spray jet direction (100) run.

26. Nozzle head according to one of claims 16 to 23, characterized in that a plurality of nozzles (15, 16) extend at different angles (102, 103) to the spray jet direction (100).

27. Nozzle head according to one of the preceding claims, characterized in that the nozzles (15, 16, 17, 17b, 17c, 18, 18b1, 18b2, 18b3) in the nozzle head (1) or an associated component (7) embedded are.

28. Nozzle head according to one of claims 1 to 26, characterized in that at least one nozzle (17a) via an insert (23) with the nozzle head (1) or with a connected component (7) is connected.

29. Nozzle head according to claim 27 or 28, characterized in that the component (7) is the air cap of a paint spray gun.

30. Nozzle head according to one of the preceding claims, characterized in that a material-carrying needle is provided, which is designed as a solid body.

31. Nozzle head according to one of the preceding claims 1 to 29, characterized

in that a hollow needle (4) with a material-carrying opening (4a) is provided.

32. Nozzle head according to claim 31, characterized in that the opening (4a) in the hollow needle (4) has a non-cylindrical shape.

33. Nozzle head according to claim 31 or 32, characterized in that the opening (4a) is connected to a material-containing device.

34. Nozzle head according to claim 33, characterized in that the opening (4a) is connected to compressed air or vacuum.

35. Nozzle head according to one of claims 30 to 34, characterized in that the needle (4) with a press fit in the nozzle head (1) sits.

36. Nozzle head according to one of the preceding claims, characterized in that one or more control nozzles (12, 12 a, 12 b) are provided.

37. Nozzle head according to one of the preceding claims, characterized in that the air-ring nozzle (5, 5a) surrounds at least one material-carrying component (3, 3a, 3b, 4).

38. Nozzle head according to claim 37, characterized in that the air ring nozzle plugged onto the material-carrying component, clipped, screwed or otherwise connected to it.

39. Nozzle head according to claim 37 or 38, characterized in that the air ring nozzle is formed integrally with the material-carrying component.

40. Nozzle head according to one of the preceding claims, characterized in that the nozzle head (1) is at least partially made of plastic, in particular injection molded from plastic.

41. Nozzle head according to claim 40, characterized in that the nozzle head (1) has an air cap (7) which is made of plastic.

42. Nozzle head according to claim 40, characterized in that a nozzle-guiding insert (23) in the nozzle head (1) is made of plastic.

43. Nozzle head according to claim 41 or 42, characterized in that the nozzle head is otherwise made of metal, in particular of steel.

44. Nozzle head according to one of the preceding claims, characterized in that it is connected directly to the body of the spray gun.

45. Nozzle head according to one of claims 1 to 43, characterized in that it is connected via a carrier device with the body of the spray gun.

46. Nozzle head according to one of the preceding claims, characterized in that it is provided on a pneumatic spray gun.

47. Nozzle head according to one of claims 1 to 45, characterized in that it is provided on a hydrostatic spray gun.

48. nozzle head according to one of claims 1 to 45, characterized in that it is provided on a combined pneumatic / hydrostatic spray gun.