DE102023111066A1 - multiple nozzle insert and airless spray gun - Google Patents

Abstract

The invention relates to a multiple nozzle insert (1) for insertion into a receiving space of a spray head of an airless spray gun, wherein a first nozzle (7) is arranged in a base body (2) such that a slot (107) of the first nozzle (7) is rotated by a few degrees with its longitudinal axis (LA107) relative to a horizontal line (H7) running transversely to the spray direction (S7) in a horizontal spray direction (S7), and wherein a second nozzle (8) is arranged in the base body (2) such that a slot (108) of the second nozzle (8) is rotated by a few degrees with its longitudinal axis (LA108) relative to a horizontal line (H8) running transversely to the spray direction (S8) in a horizontal spray direction (S8).

Description

The invention relates to a multiple nozzle insert and an airless spray gun according to the preamble of claims 1 and 9 respectively.

From the DE 203 20 747 U1 It is known to equip an airless spray gun with a double nozzle, wherein the double nozzle is designed in the form of two slot-like nozzle openings arranged next to one another, preferably in a row, which are arranged and designed in such a way that the spray jets overlap in the longitudinal direction.

The invention is based on the object of developing a multiple nozzle insert or an airless spray gun by which the spray pattern is optimized.

This object is achieved on the basis of the features of the preamble of claim 1 or 9 by the characterizing features of claim 1 or 9. Advantageous and expedient further developments are specified in the respective subclaims.

The multiple nozzle insert for insertion into a receiving space of a spray head of an airless spray gun comprises a cylinder-like base body and a handle arranged on the base body, wherein the base body comprises at least a first receiving space and a second receiving space to form a multiple nozzle, wherein the multiple nozzle insert comprises at least a first nozzle and a second nozzle and wherein the first nozzle is received in the first receiving space and wherein the second nozzle is received in the second receiving space, wherein each of the nozzles comprises an outlet body with a spray opening designed as a slot, wherein the first nozzle is arranged in the base body such that the slot of the first nozzle is rotated by a few degrees with its longitudinal axis relative to a horizontal line running transversely to the spray direction when the spray direction is horizontal, and wherein the second nozzle is arranged in the base body such that the slot of the second nozzle is rotated by a few degrees with its longitudinal axis relative to a horizontal line running transversely to the spray direction when the spray direction is horizontal. Tests have shown that by aligning the slot of the first nozzle and the slot of the second nozzle in this way, an improved spray pattern can be achieved compared to a multiple nozzle insert designed with slots aligned in accordance with the state of the art, with the improvement being particularly evident in the edge areas of the spray pattern in such a way that when stripes are sprayed next to each other with a slight overlap, an undesirably high paint application is avoided in the edge areas, so that the sprayed surface has an even appearance of uniform color depth that is streak-free. Accordingly, undesirable, so-called "tailing" can be avoided particularly reliably with the multiple nozzle insert according to the invention.

It can also be provided that the slot of the first nozzle and the slot of the second nozzle are rotated in the same direction around the respective spray direction. The use of such a multiple nozzle insert has also shown an improved spray pattern in tests compared with a multiple nozzle insert designed with conventionally aligned slots.

Furthermore, it can be provided that the longitudinal axis of the slot of the first nozzle and the longitudinal axis of the slot of the second nozzle are aligned parallel to one another. The use of such a multiple nozzle insert has also shown an improved spray pattern in tests compared with a multiple nozzle insert designed with slots aligned in accordance with the state of the art.

It can also be provided to rotate the longitudinal axis of the slot of the first nozzle by 7° to 9° and in particular by 8° relative to the horizontal running transversely to the spray direction and/or to rotate the longitudinal axis of the slot of the second nozzle by 7° to 9° and in particular by 8° relative to the horizontal running transversely to the spray direction. The use of such multiple nozzle inserts has also shown an improved spray pattern in tests compared with a multiple nozzle insert designed with slots aligned in accordance with the state of the art.

Furthermore, it can be provided that the first nozzle and the second nozzle are turned to the right in the respective spray direction or that the first nozzle and the second nozzle are turned to the left in the respective spray direction. The use of such multiple nozzle inserts has also shown an improved spray pattern in tests compared with a multiple nozzle insert designed with slots aligned in accordance with the state of the art.

It can also be provided to design the multiple nozzle as a double nozzle, which exclusively comprises the first nozzle and the second nozzle, wherein it is particularly provided to operate the double nozzle in spray mode at a pressure of 14 MPa for a flow rate of 0.7 litres per minute to 1.5 litres per minute and preferably about 1.2 litres per Minute. Such a design and, if necessary, dimensioning led to an improved spray pattern in tests compared with a multiple nozzle insert designed with slots aligned in accordance with the state of the art.

The airless spray gun comprises a spray head with a receiving space and a multiple nozzle insert inserted therein, which is designed according to at least one of claims 1 to 8. With an airless spray gun designed in this way, improved spray patterns can be produced.

It can also be provided to operate the multiple nozzle insert of the airless spray gun with a spray pressure of 9 MPa to 11 MPa in each nozzle or to provide the multiple nozzle insert for use in the airless spray gun at a spray pressure of up to 25 MPa. According to the tests carried out, airless spray guns operated in this way can produce improved spray patterns compared with airless spray guns with a multiple nozzle insert with slots aligned in accordance with the state of the art.

Furthermore, it can be provided that the paint fed to the multiple nozzle insert of the airless spray gun enters the nozzles at a temperature of 30°C to 50°C and in particular 40°C, whereby it is particularly provided that the paint is heated in a paint hose to which the airless spray gun is connected. According to the tests carried out, airless spray guns operated in this way can also produce improved spray patterns in comparison with airless spray guns with a multiple nozzle insert with slots aligned in accordance with the state of the art.

Finally, when the multiple nozzle insert is designed as a double nozzle, it can be provided that a first spray axis of the first nozzle and a second spray axis of the second nozzle are arranged at an angle of 3° to one another in such a way that a first spray jet generated by the first nozzle and a second spray jet generated by the second nozzle meet in front of the double nozzle. According to the tests carried out, airless spray guns operated in this way can also produce improved spray patterns compared with airless spray guns with a multiple nozzle insert with slots aligned in accordance with the state of the art.

For the purposes of the invention, a handle is understood to be an extension formed on the base body in any shape, which enables the multiple nozzle insert to be handled manually or with the aid of a tool.

Further details of the invention are described in the drawing using schematically illustrated embodiments.

• 1a: eine schematische Darstellung einer Airless-Sprühpistole mit einem in diese eingesetzten schematisch dargestellten Mehrfachdüseneinsatz;
• 1b: den in der 1a gezeigten, schematisch dargestellten Mehrfachdüseneinsatz in Alleinstellung;
• 2: eine konkrete Ausführungsvariante des in den 1a und 1b schematisch dargestellten Mehrfachdüseneinsatzes;
• 3: eine Detailansicht der in der 2 gezeigten konkreten Ausführungsvariante des Mehrfachdüseneinsatzes;
• 4: die Detailansicht der 3 mit zur Erläuterung von Details veränderten Abmessungen;
• 5: eine Detailansicht der 4 und
• 6: den in der 2 gezeigten Mehrfachdüseneinsatz in einer Ansicht von links.

Here shows:

• 1a : a schematic representation of an airless spray gun with a schematically shown multiple nozzle insert inserted into it;
• 1b : the one in the 1a shown, schematically illustrated multiple nozzle insert in isolation;
• 2 : a concrete variant of the 1a and 1b schematically shown multiple nozzle insert;
• 3 : a detailed view of the 2 shown concrete design variant of the multiple nozzle insert;
• 4 : the detailed view of the 3 with dimensions modified to illustrate details;
• 5 : a detailed view of the 4 and
• 6 : the one in the 2 shown multiple nozzle insert in a view from the left.

In the 1a an airless spray gun 101 is shown schematically with a multiple nozzle insert 1 inserted into a spray head 102 of the airless spray gun 101. Furthermore, in the 1b the multiple nozzle insert 1 in isolation and also shown schematically.

The multiple nozzle insert 1 is designed as an interchangeable insert and can be removed from a receiving space 103 of the spray head 102 of the airless spray gun 101, for example for cleaning. To do this, the multiple nozzle insert 1 must be rotated 90° around its vertical axis H1 and then pulled upwards out of the receiving space 103. The multiple nozzle insert 1 is inserted into the spray head 102 in the reverse order. When the airless spray gun 101 is ready to spray, the spray head 102 and the multiple nozzle insert 1 are thus locked together by a type of bayonet lock.

The multiple nozzle insert 1 for insertion into the receiving space 103 of the spray head 102 of the airless spray gun 101 comprises a cylinder-like base body 2 and a handle 3 arranged on the base body 2. To form a multiple nozzle 4, the base body 3 comprises a first receiving space 5 and a second receiving space 6.

A further description of the multiple nozzle insert 1 is given on the basis of the 2 shown, detailed illustration of the multiple nozzle insert 1 and the 3 to 5 shown detailed representations of the 2 shown multiple nozzle insert 1. The representations of the 3 to 5 are each partially cut, whereby hatching of cut areas has been omitted in order to maintain the clarity of the representations.

As already mentioned, the multiple nozzle insert 1 comprises the cylinder-like base body 2 and the handle 3 arranged on the base body 2, wherein the base body 2 comprises the first receiving space 5 and the second receiving space 6 for forming the multiple nozzle 4. Furthermore, the multiple nozzle insert 1 comprises a first nozzle 7 and a second nozzle 8, wherein the first nozzle 7 is accommodated in the first receiving space 5 and wherein the second nozzle 8 is accommodated in the second receiving space 6.

Each of the nozzles 7, 8 is designed in several parts and comprises an inlet body 9, 13 with an inlet opening 9a, 13a and an outlet body 10, 14 with a spray opening 10a, 14a (see 3 ). Furthermore, each of the nozzles 7, 8 also comprises a ring-like seal 11, 15. To form the respective nozzle 7, 8, the respective seal 11, 15 is held pressed together under elastic deformation between the respective inlet body 9, 13 and the respective outlet body 10, 14 in such a way that the respective inlet body 9, 13 and the respective outlet body 10, 14 are sealed against one another to form a nozzle interior 12, 16. The inlet body 9, 13 is also referred to as a pre-atomizer and the outlet body 10, 14 is also referred to as a final atomizer. The nozzles 7, 8 are supplied with pressurized paint via the inlet openings 9a, 13a when the multiple nozzle insert 1 is inserted into the airless spray gun 101 and its trigger is actuated.

A collar 3a is formed on the handle 3, by means of which a locking mechanism in the receiving space 103 of the spray head 102 (see 1b , 2 , 1a) takes place, wherein the receiving space 103 has an invisible undercut for this purpose.

The inlet body 9 and the outlet body 10 are each designed such that the nozzle interior 12, 16 is designed as a nozzle interior 12, 16 whose diameter suddenly expands in the spray direction S7, S8 of the nozzle 7, 8 (see 4 ). To maintain clarity, not all reference symbols are shown in all figures, although the 1a to 6 the same multiple nozzle insert 1. If necessary, a summary of several figures should be carried out.

Each of the nozzle interiors 12, 16 is sealed by the seal 11, 15 in such a way that the multiple nozzle insert 1 is suitable for use in the airless spray gun 101 at a spray pressure of up to 25 MPa.

After the detailed descriptions of the 2 and 3 existing special features cannot be shown and described sufficiently clearly due to the small differences in dimensions, the 4 a representation which the 3 with the difference that in the 4 the dimensions of the inlet bodies 9, 13 are modified to allow the drawing of further reference symbols. In the 5 is the representation of the 4 then shown in a central section with even greater magnification using the first nozzle 7 as an example, wherein the statements regarding the first nozzle 7 also apply analogously to the second nozzle 8.

Based on the 4 and 5 In the area of the nozzles 7, 8, it can be seen how the respective inlet body 9, 13 and the respective outlet body 10, 14 protrude into one another, forming a clearance fit, such that the inlet body 9, 13 can be positioned in different positions relative to the inlet body 9, 13 along a spray axis SA7, SA8 of the respective nozzle 7, 8, such that, depending on the position - namely the orientation of the inlet body relative to the outlet body - different volumes result for the nozzle interior 12, 16.

As can be seen in particular from the 4 and 5 As can be seen, the inlet body 9, 13 comprises a tubular extension 9b, 13b towards the outlet body 10, 14 and projects with this extension 9b, 13b through the seal 11, 15, forming the clearance fit into a cup-like receiving space 10b, 14b of the outlet body 10, 14.

According to a variant embodiment not shown, it is provided to form the outlet body with a tubular extension towards the inlet body, wherein the outlet body with this extension protrudes through the seal, forming the clearance fit into a cup-like receiving space of the inlet body.

For the nozzles 7, 8, a cross-sectional area A10a, A14a of the spray opening 10a, 14a and a cross-sectional area A9a, A13a of the inlet opening 9a, 13a are in a ratio of approximately 2:3 (see 4 ).

For nozzles 7, 8, a division of a volume V12, V16 of the nozzle interior 12, 16 by the cross-sectional area A10a, A14a of the spray opening 10a, 14a to a value of 175 mm (see 4 ).

For the nozzles 7, 8, dividing a distance a10a-9a, a14a-13a of the spray opening 10a, 14a from the inlet opening 9a, 13a by the cross-sectional area A10a, A14a of the spray opening 10a, 14a leads to a value of 84 1/mm (see 3 , 4 ).

In the nozzles 7, 8, the cross-sectional area A10a, A14a of the spray opening 10a, 14a is slot-like and the cross-sectional area A9a, A13a of the inlet opening 9a, 13a is circular.

The multiple nozzle 4 is designed as a double nozzle 17, wherein the double nozzle 17 is dimensioned for a flow rate of 0.7 liters per minute to 1.5 liters per minute and in particular about 1.2 liters per minute in spray operation at 14 MPa.

According to a variant not shown, the multiple nozzle can also be designed as a triple nozzle, with the individual nozzles either aligned with their spray axes one below the other or arranged on a circle with their spray axes offset by 120°. Accordingly, a quadruple nozzle or an n-fold nozzle can also be designed as variant designs.

Due to the mentioned clearance fit between the inlet body 9, 13 and the outlet body 10, 14, an annular gap R9-10, R13-14 is formed. Each annular gap R9-10, R13-14 has a radially measured thickness DR9-10 of approximately 0.04 mm. The tubular extensions 9b, 13b each have a diameter D9b of 2.5 mm and the cup-like receiving spaces 10b, 14b of the outlet bodies 10, 14 each have a diameter D10b of 2.54 mm (see 4 and 5 The dimensions mentioned are in the 5 exemplified by the first nozzle 7. The tubular extension 9b is formed with a bevel F9b towards the outlet body 10. This bevel F9b is rounded. This makes it easier to insert the inlet body 9 into the outlet body 10. The inlet body 13 is formed accordingly.

As can be seen from the 3 As can be seen, each of the receiving spaces 5, 6 running through the base body tapers in the respective spray direction S7, S8 in such a way that the respective outlet body 10, 14 rests against the base body 2 in the spray direction S7, S8 and that the respective inlet body 9, 13 is held in the respective receiving space 5, 6 by a press fit. When the inlet body 9, 13 is pressed in sufficiently deeply, pressure is exerted on the respective outlet body 10, 14 via the intermediate seal 11, 15 in such a way that its orientation is fixed in such a way that the spray axis SA7, SA8 of the respective nozzle 7, 8 is permanently fixed in its orientation. Accordingly, the double nozzle 17 permanently retains a spray pattern set during assembly.

In the multiple nozzle insert 1, a distance a10a-9a, a14a-13a of the respective spray opening 10a, 14a from the respective inlet opening 9a, 13a is determined by a press-in position EP9, EP13 of the respective inlet body 9, 13 in the respective receiving space 5, 6 (see 3 and 4 ). If the inlet bodies 9, 13 are pushed deeper into the outlet bodies 10, 14 in the spray direction S7, S8 and the seal 11, 15 is compressed more strongly or a thinner seal is used, the distance mentioned is shortened and thus a characteristic of the respective nozzle 7, 8 is also changed.

The multiple nozzle insert 1 also comprises a sleeve 18. The sleeve 18 encases the base body 2. Adjacent to the two inlet bodies 9, 13, the sleeve 18 comprises a first inlet opening 19 and a second inlet opening 20 and adjacent to the two outlet bodies 10, 14, the sleeve 18 comprises an outlet opening 21. The two inlet openings 19, 20 are designed to be so small that the inlet bodies 9, 13 are enclosed in the receiving spaces 5, 6 between the seals 11, 15 and the sleeve 18 and that the sleeve 18 partially closes the receiving spaces 5, 6 towards the inlet bodies 9, 13 (see in particular 2 and 4 ). According to a variant embodiment not shown, the two inlet openings can also be formed by a single inlet opening through which the inlet openings of the inlet bodies can be supplied with pressurized paint.

The multiple nozzle insert 1 also comprises a locking pin 22, wherein the locking pin 22 connects the sleeve 18 and the base body 2 such that the sleeve 18 is connected to the base body 2 in a rotationally fixed and displacement-proof manner.

For example, from the 4 it is evident how the seal 11, 15 is arranged between a circular ring-like bottom surface BF10, BF14 of the outlet body 10, 14 and a circular ring-like cover surface DF9, DF13 of a collar K9, K13 of the inlet body 9, 13.

For all figures, it is pointed out that the seals 11, 15 are always shown schematically and the deformation of the seals 11, 15 that occurs in practice is not shown. In the In practice, the seals 11, 15 are deformed towards the mentioned annular gap R9-1, R13-14 in such a way that it is sealed.

As mentioned above, the 1 the airless spray gun 101, which comprises the spray head 102 with the receiving space 103 and the multiple nozzle insert 1 inserted therein, wherein the multiple nozzle insert 1 is only shown schematically, but in detail according to the 2 to 6 trained.

It is intended to operate the multiple nozzle insert 1 of the airless spray gun 101 with a spray pressure of 9 MPa to 11 MPa in each nozzle 7, 8. Alternatively or cumulatively, it is intended to connect a paint heater (not shown) upstream of the airless spray gun 101, which can be formed in a paint hose. The paint supplied to the multiple nozzle insert 1 is heated by the paint heater in such a way that it enters the nozzles 7, 8 at a temperature of 30°C to 50°C and in particular 40°C. Alternatively or cumulatively, when the multiple nozzle insert 1 is designed as a double nozzle 17, it is further provided that a first spray axis S7 of the first nozzle 7 and a second spray axis S8 of the second nozzle 8 are arranged at an angle of 3° to one another such that a first spray jet SPS7 generated by the first nozzle 7 and a second spray jet SPS8 generated by the second nozzle 8 meet in front of the double nozzle 17.

In the 6 is a lower area of the 2 shown multiple nozzle insert 1 in a view from the left, so that the view is directed towards the outlet body 10 of the first nozzle 7 and the outlet body 14 of the second nozzle 8. Accordingly, from this view an alignment of the slot 107 of the first nozzle 7 with respect to the spray direction S7 extending out of the drawing plane and an alignment of the slot 108 of the second nozzle 8 with respect to the spray direction S8 extending out of the drawing plane can be seen.

When the spray direction S7 is aligned horizontally, the slot 107 of the first nozzle 7 is rotated with its longitudinal axis LA107 to the right by an angle α of 8° relative to a horizontal line H7 running transversely to the spray direction S7 - viewed in the spray direction S7.

When the spray direction S8 is aligned horizontally, the slot 108 of the second nozzle 8 is rotated with its longitudinal axis LA108 to the right by an angle β of 8° relative to a horizontal line H8 running transversely to the spray direction S8 - viewed in the spray direction S8.

Accordingly, the two slots 107, 108 are rotated in the same direction by the same angle and thus aligned parallel to each other such that their longitudinal axes LA107 and LA108 run parallel to each other.

As can be seen from the 3 and 4 As can be seen and as already described above, the spray axes SA7 and SA8 of the nozzles 7 and 8 are tilted towards each other - viewed in the spray directions S7 and S8 respectively - in such a way that they intersect at an angle of 3° in front of the multiple nozzle insert 1.

According to an embodiment variant not shown, the spray axes SA7 and SA8 are intended to run parallel to each other.

According to a variant embodiment not shown, it is provided that the nozzles are each formed in one piece.

list of reference symbols

1

multiple nozzle insert

2

base of 1

3

handle on 2

3a

collar at 3

4

multiple nozzle

5

first recording room

6

second recording room

7

first nozzle

8

second nozzle

9

inlet body of 7

9a

inlet opening

9b

tubular extension of 9

10

outlet body of 7

10a

spray opening

10b

cup-shaped receiving space of 10

11

ring-like seal of 7

12

nozzle interior of 7

13

inlet body of 8

13a

inlet opening

13b

tube-like extension of 13

14

outlet body of 8

14a

spray opening

14b

cup-shaped receiving space of 14

15

ring-like seal of 8

16

nozzle interior of 8

17

double nozzle

18

sleeve

19, 20

inlet opening

21

outlet opening

22

locking pin

101

airless spray gun

102

spray head from 101

103

recording room in 102

107

slot of 7

108

slot of 8

LA107

longitudinal axis of 107

LA108

longitudinal axis of 108

H7

Horizontal across S7

H8

Horizontal across S8

A10a, A14a

cross-sectional area of 10a, 14a

A9a, A13a

cross-sectional area of 9a, 13a

a10a-9a

distance between 10a and 9a

a14a-13a

distance between 14a and 13a

BF10, BF14

floor area of 10, 14

D9b

diameter of 9b

D10b

diameter of 10b

DF9, DF13

deck area of 9, 13

DR9-10

thickness of R9-10

EP9

press-in position of 9

EP13

press-in position of 13

F9b

bevel on 9b

H1

vertical axis of 1

K9, K13

collar of 9, 13

R9-10, R13-14

Annular gap between 9 and 10 or 13 and 14

S7

spray direction of 7

S8

spray direction of 8

SA7

spray axis of 7

SA8

spray axis of 8

SPS7

spray jet of 7

SPS8

spray jet of 8

V12,V16

Volume of the nozzle interior 12, 16

α

angle between LA107 and H7

β

Angle between LA108 and H8

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 20320747 U1 [0002]

Claims (12)

Multiple nozzle insert (1) for insertion into a receiving space (103) of a spray head (102) of an airless spray gun (101), comprising - a cylinder-like base body (2) and a handle (3) arranged on the base body (2), - wherein the base body (2) comprises at least a first receiving space (5) and a second receiving space (6) to form a multiple nozzle (4), - wherein the multiple nozzle insert (1) comprises at least a first nozzle (7) and a second nozzle (8) and - wherein the first nozzle (7) is accommodated in the first receiving space (5) and wherein the second nozzle (8) is accommodated in the second receiving space (6), - wherein each of the nozzles (7; 8) comprises an outlet body (10; 14) with a spray opening (10a; 14a) designed as a slot (107; 1088), characterized in that - the first nozzle (7) is arranged in the base body (2) in such a way is that the slot (107) of the first nozzle (7) is rotated by a few degrees with its longitudinal axis (LA107) relative to a horizontal line (H7) running transversely to the spray direction (S7) in the horizontal spray direction (S7), - that the second nozzle (8) is arranged in the base body (2) in such a way that the slot (108) of the second nozzle (8) is rotated by a few degrees with its longitudinal axis (LA108) relative to a horizontal line (H8) running transversely to the spray direction (S8) in the horizontal spray direction (S8). Multiple nozzle use after claim 1 , characterized in that the slot (107) of the first nozzle (7) and the slot (108) of the second nozzle (8) are rotated in the same direction about the first spray direction (S7) and the second spray direction (S8), respectively. Multiple nozzle use after claim 2 , characterized in that the longitudinal axis (LA107) of the slot (107) of the first nozzle (7) and the longitudinal axis (LA108) of the slot (108) of the second nozzle (8) are aligned parallel to each other. Multiple nozzle insert according to at least one of the preceding claims, characterized in that the longitudinal axis (LA107) of the slot (107) of the first nozzle (7) is rotated by 7° to 9° and in particular by 8° with respect to the horizontal (H7) running transversely to the spray direction (S7). Multiple nozzle insert according to at least one of the preceding claims, characterized in that the longitudinal axis (LA108) of the slot (108) of the second nozzle (8) is rotated by 7° to 9° and in particular by 8° relative to the horizontal (H8) running transversely to the spray direction (S8). Multiple nozzle insert according to at least one of the preceding Claims 1 until 5 , characterized in that the first nozzle (7) and the second nozzle (8) are rotated to the right when viewed in the respective spray direction (S7; S8). Multiple nozzle insert according to at least one of the preceding Claims 1 until 5 , characterized in that the first nozzle (7) and the second nozzle (8) are rotated to the left when viewed in the respective spray direction (S7; S8). Multiple nozzle insert according to at least one of the preceding claims, characterized in that the multiple nozzle (4) is designed as a double nozzle (17) which exclusively comprises the first nozzle (7) and the second nozzle (8), wherein it is particularly provided that the double nozzle (17) is dimensioned for a flow rate of 0.7 liters per minute to 1.5 liters per minute and preferably about 1.2 liters per minute in spray operation at a pressure of 14 MPa. Airless spray gun (101) comprising a spray head (102) with a receiving space (103) and a multiple nozzle insert (1) inserted therein, characterized in that the multiple nozzle insert (1) is designed according to at least one of the Claims 1 until 8 trained. Airless spray gun after claim 9 , characterized in that the multiple nozzle insert (1) of the airless spray gun (101) is operated with a spray pressure of 9 MPa to 11 MPa in each nozzle (7; 8) or that the multiple nozzle insert (1) is suitable for use in the airless spray gun (101) at a spray pressure of up to 25 MPa. Airless spray gun after claim 9 or 10 , characterized in that the paint supplied to the multiple nozzle insert (1) of the airless spray gun (101) enters the nozzles (7; 8) at a temperature of 30°C to 50°C and in particular 40°C, wherein it is particularly provided that paint is heated in a paint hose to which the airless spray gun is connected. Airless spray gun after claim 9 or 10 or 11 , characterized in that when the multiple nozzle insert (1) is designed as a double nozzle (17), a first spray axis (SA7) of the first nozzle (7) and a second spray axis (SA8) of the second Nozzles (8) are at an angle of 3° to one another such that a first spray jet (SPS7) generated by the first nozzle (7) and a second spray jet (SPS8) generated by the second nozzle (8) meet in front of the double nozzle (17).

Images