Inkjet ink composition and method of using the same

Abstract

The invention relates to a colorant nozzle assembly (1) for a colorant jet device (101) for generating a colorant spray jet, wherein the colorant nozzle assembly (1) comprises a needle (3), a nozzle body (6) and a seal, wherein the nozzle body (6) comprises a nozzle opening, a colorant feed inlet and a needle guide, wherein the seal divides an interior space (9) enclosed by the nozzle body (6) into a front chamber and a colorant chamber (11), and wherein the seal is fixedly connected with the needle (3). In this case it is provided that the seal is designed as a membrane seal and is fixedly connected with the nozzle body (6), and that the interior space comprises a widening towards the needle guide.

Description

Technical Field

[0001] This invention relates to a pigment nozzle assembly for a pigment spraying device for generating a pigment spray jet, and to a pigment spraying device. Background Technology

[0002] A color nozzle assembly for a color spraying device for generating a color spray jet is known from WO 2017 / 081276 A1, wherein the color nozzle assembly includes a needle, a nozzle body and a seal, wherein the nozzle body includes a nozzle opening, a color inlet and a guide needle, and wherein the seal divides the internal space enclosed by the nozzle body into a pre-chamber and a color chamber. Summary of the Invention

[0003] The objective of this invention is to provide increased installation space for the seal for a pigment nozzle assembly or pigment injection device while minimizing the volume of the pigment chamber when the nozzle is closed.

[0004] The task is solved based on the following approach.

[0005] The pigment nozzle assembly of a pigment spraying device for generating a pigment spray jet according to the present invention includes a needle, a nozzle body, and a seal. The nozzle body includes a nozzle opening, a pigment inlet, and a needle guide. The seal divides the internal space enclosed by the nozzle body into a pre-chamber and a pigment chamber. The seal is fixedly connected to the needle and is designed as a membrane seal. The internal space includes a widened portion facing the needle guide. This widening provides increased mounting space and thereby creates movement space for the membrane seal, enabling the use of a large-diameter membrane seal. This minimizes deformation experienced by the membrane seal in various open positions of the needle, resulting in a long service life for the membrane seal.

[0006] It is also specified that when the pigment nozzle is closed, the seal is deformed by the needle towards the nozzle opening, causing the seal to partially abut against the front inner side of the widened portion, thereby minimizing the volume of the pigment chamber. As a result, the pigment chamber in the pigment nozzle assembly remains particularly small when the pigment nozzle is closed, ensuring that at most a small amount of pigment may dry within the assembly, facilitating cleaning as only a small amount of pigment residue needs to be removed.

[0007] It is also specified that when the pigment nozzle is fully open, the seal deforms towards the guide needle, causing it to rest against the rear inner side of the widened portion. Because the seal rests flat against this rear inner side, it is unloaded when the pigment volume flow rate is at its maximum. This also increases the seal's service life.

[0008] It is also specified that the pigment nozzle assembly includes a compression spring, which is clamped between the guide needle and the needle flange, causing the needle to be withdrawn from the nozzle opening. This facilitates cleaning of the pigment nozzle assembly because the pigment chamber can be flushed through the pigment inlet and the nozzle opening automatically released by the needle, without the need for auxiliary devices to act on the needle. This design also eliminates the need for a cross pin that passes through the needle, which would otherwise be necessary to retract the needle. Consequently, the installation and removal of the pigment nozzle assembly are correspondingly simplified.

[0009] It is also specified that the nozzle body includes a near-cylindrical outer shell, wherein the guide needle is formed by a disc-shaped perforated plate molded onto the inner surface of the near-cylindrical outer shell, wherein the wall of the disc-shaped perforated plate slopes from the outer shell toward the compression spring. In this way, the guide needle can transmit the high-pressure clamping force of the compression spring to the near-cylindrical outer shell of the nozzle body, thus preventing damage to the nozzle body even when using a strong compression spring.

[0010] It is also specified that the nozzle body is designed to consist of two parts, including: a front nozzle body portion with a nozzle opening and a pigment inlet; and a rear nozzle body portion with a guide needle. The front nozzle body portion includes a rear flange with two steps, and the rear nozzle body portion includes a front flange with two steps. The end faces of the corresponding outer steps abut against each other and are joined together, either by ultrasonic welding or by means of an insert, followed by plastic injection molding, screw tightening, gluing, or at least one clamp. The end faces of the corresponding inner steps face each other with a seal clamped between them. This ensures not only a reliable and liquid-tight connection of the nozzle body portions but also a reliable connection between the seal and the nozzle body.

[0011] It is also specified that the needle and seal are integrally molded, with the seal being formed of plastic and injection molded onto the needle. This simplifies the assembly of the colorant nozzle assembly. Therefore, especially if the needle and film are made of different materials, the injection molding process can be carried out in two stages. Alternatively, the injection molding process may also be carried out in one stage, in which the needle and film are manufactured from the same material during the injection molding process.

[0012] It also specifies that the seal is connected to the needle in a shape-fitting manner, wherein the needle includes a radially circumferential groove for receiving a perforated disc-shaped seal, which, after elastic widening, engages into the radially circumferential groove. This allows for the low-cost manufacture of pigment nozzle assemblies with seals suitable for different pigments and / or pressures.

[0013] It also specifies that the seal is connected to the needle in a force-fit manner, wherein the needle is glued or welded to the perforated disc-shaped seal. This allows for the low-cost manufacture of pigment nozzle assemblies with seals suitable for different pigments and / or pressures.

[0014] It is also specified that the rear inner surface is formed by a guide pin. This eliminates the need for additional components and saves materials.

[0015] Finally, it is specified that the front inner surface is formed in the rear flange area of ​​the front nozzle body portion. In this area, the front inner surface can be formed as a draft slope in a technically simple manner in the front nozzle body portion designed as an injection molded part.

[0016] The pigment spraying device according to the present invention for generating a pigment spray jet includes a front end, a rear end, a pigment container, and a pigment nozzle assembly, wherein the pigment nozzle assembly is designed according to the above-described scheme. Thus, the pigment spraying device achieves the advantages listed in the above-described scheme.

[0017] It is also specified that the pigment nozzle assembly is housed between the front and rear ends, such that the pigment nozzle assembly is connected to the front end only in a form-fit and / or force-fit manner, and to the rear end only in a form-fit and / or force-fit manner. This allows the pigment nozzle assembly to be separated from the rest of the pigment spraying equipment in a low-cost, non-destructive, and reassembleable manner, facilitating cleaning of the pigment nozzle assembly or replacement with a new or refurbished pigment nozzle assembly and subsequent reconnection to the rest of the pigment spraying equipment.

[0018] Finally, it is specified that the pigment spraying equipment includes a fan to generate airflow, and this fan is specifically designed as a radial flow fan. This eliminates the need for a flexible air supply hose, simplifying the operation of the pigment spraying equipment.

[0019] For the purposes of this invention, the pigment nozzle assembly is understood to be an assembly capable of generating a pigment jet and including a needle that can move longitudinally.

[0020] In this invention, the front end of the pigment spraying device is understood as the first housing half of the pigment spraying device, on which the pigment container is connected.

[0021] In this invention, the rear end of the pigment injection device is understood as the second housing half of the pigment injection device, on which a trigger (Abzug) is arranged.

[0022] In this invention, the seal designed as a membrane seal is understood as a perforated disc-shaped seal, the thickness of which is small enough that the seal can be flexibly bent, such that a first ring surrounding the hole of the seal and a second ring surrounding the outer circumference of the seal can be located in planes that are parallel to each other and spaced apart from each other. Attached Figure Description

[0023] Other details of the invention are described in the accompanying drawings with reference to the illustrative embodiments.

[0024] in this case:

[0025] Figure 1-3 The pigment spraying apparatus according to the invention is shown in side view, side sectional view and exploded view;

[0026] Figure 4 It shows from Figure 2 and 3 A side view of a known pigment nozzle assembly;

[0027] Figure 5a , 5b It shows in Figure 4 The image shows a side sectional view of the colorant nozzle assembly with the nozzle opening closed and a detailed view of the area of ​​the seal.

[0028] Figure 6a , 6b It shows in Figure 4 The image shows a side sectional view of the colorant nozzle assembly with the nozzle opening partially open and a detailed view of the area of ​​the seal.

[0029] Figure 7a , 7b It shows in Figure 4 The figure shows a side sectional view of the pigment nozzle assembly with the nozzle opening open and a detailed view of the area of ​​the seal; and

[0030] Figure 8 A side sectional view of an embodiment of the pigment nozzle assembly according to the invention is shown, the pigment nozzle assembly being similar to that when the nozzle opening is open. Figure 7a The location is shown. Detailed Implementation

[0031] Figures 1 to 3 The pigment injection device 101 according to the present invention is shown in side view, side sectional view and exploded view. The pigment injection device 101 includes a front end 201, a rear end 301, a pigment container 401 and a pigment nozzle assembly 1 housed between the front end 201 and the rear end 301. In this case, only in… Figure 2 and 3 The colorant nozzle assembly 1 can be seen in the image.

[0032] from Figure 3 The exploded view shows that the pigment nozzle assembly 1 is housed between the front end 201 and the rear end 301. During installation, the pigment nozzle assembly 1 is first inserted into the front end 201 up to the stop, and then the front end 201 and the pigment nozzle assembly 1 are pushed together into the rear end 301.

[0033] The front end 201 also includes an air cap 202 and a locking nut 203. After the front end 201, which houses the pigment nozzle assembly 1, is pushed in, it is screwed onto the rear end 301 by means of the locking nut 203 with the air cap 202 in place. The pigment container 401 can be screwed into the front end 201 before or after the described installation.

[0034] The rear end 301 includes an electric fan 302 (not shown further), which draws in air from the environment U via inlet 303 and blows the air toward the front end 201, causing the air to surround the colorant nozzle assembly 1 and, in this case, to pass by the colorant nozzle assembly 1 and be blown out via air cap 202, so that the air, during operation according to the HVLP spraying method, re-enters the environment U together with the schematically shown colorant jet FS ejected from the colorant nozzle assembly 1 and forms a colorant spray jet FSS together with the colorant jet.

[0035] The rear end 301 also includes a trigger 304. The trigger acts on a cross pin 306 connected to a spring-loaded plunger 305 via a mechanism not shown, such that the spring-loaded plunger 305 can be pulled back toward the tension spring 307 by means of the trigger 304.

[0036] exist Figure 2 In the position shown, the nozzle opening 2 of the pigment nozzle assembly 1 is closed by the needle 3 of the pigment nozzle assembly 1 because the trigger 304 is not actuated and the tension spring 307 presses the plunger 305 against the rear end 3b of the needle 3 (see Figure 1). Figure 3 This allows the tension spring to overcome the pressure of the compression spring 4 located on the needle 3, thus pulling the needle 3 away from the... Figure 7a The open position C shown in the figure is pressed against the Figure 2 and Figure 5a The closed position A is shown in the diagram. This is because the spring force of the tension spring 307 is greater than the pressure of the compression spring 4.

[0037] If the user actuates trigger 304 in the direction of arrow x, the tension spring 307 is compressed, such that the compression spring 4 causes needle 3, supported on guide needle 8 and abutting against flange 3c of needle 3, to press against plunger 305 in the direction of arrow x, and needle 3 towards open position C (see...). Figure 7a (Leaving in the direction) Figure 5aThe closed position A is shown in the figure, in which the plunger 305 is moved by the needle in the direction of the arrow x.

[0038] exist Figure 4 The side view shows the pigment nozzle assembly 1, and Figure 5a , 6a 7a shows the pigment nozzle assembly 1 in a side sectional view, with the needle 3, seal 5, and compression spring 4 in different positions, namely the closed position A (see 7a). Figure 5a ), Open location C (see Figure 7a ) or the middle position B (see Figure 6a ).exist Figure 5b , 6b In Figures 7b and 7b, the colorant nozzle assembly 1 is shown within the area of ​​the seal 5, respectively. Figure 5a Detailed views matching 6a or 7a.

[0039] from Figure 5a As can be seen, the needle 3 is surrounded by the nozzle body 6. The nozzle body 6 includes a nozzle opening 2, a pigment inlet 7, and a needle guide 8. The seal 5 divides the internal space 9 surrounded by the nozzle body 6 into a front chamber 10 and a pigment chamber 11. The seal 5 is designed as a membrane seal and is fixedly connected to the needle 3. Furthermore, the seal 5, designed as a membrane seal, is fixedly connected to the nozzle body 6. The internal space 9 includes a widened portion 12 facing the needle guide 8.

[0040] A pigment nozzle 13 is formed through the needle 3 and the nozzle opening 2.

[0041] In this situation, when the pigment nozzle 13 is closed or the needle 3 is in the closed position A, the seal 5 is deformed by the needle 3 towards the nozzle opening 2, causing the seal to partially abut against the front inner surface 12a of the widened portion 12. This minimizes the volume VA11 of the pigment chamber 11 not only relative to the volume VB11 occupied by the pigment chamber 11 in the intermediate position B, but also relative to the volume VC11 occupied by the pigment chamber 11 in the open position C. In this situation, in the closed position A of the needle 3, the seal 5 abuts against the front inner surface 12a with its annular surface KF5a (see...). Figure 5a and 5b In this case, with the needle 3 in the open position C, the rear annular surface KF5b of the seal 5 rests against the rear inner side 12b of the widened portion (see...). Figure 7a , 7b ).

[0042] At the middle position B of the needle 3, the front annular surface KF5a and the rear annular surface KF5b of the seal 5 are non-contactly located between the front inner surface 12a and the rear inner surface 12b of the widened portion 12 of the internal space 9 (see...). Figure 6a ,6b ).

[0043] In this way, when the needle 3 is in the open position C, that is, when the pigment nozzle 13 is fully open, the seal 5 can be supported on the rear inner side 12b, so that the seal is only slightly loaded due to the pressure of the pigment flowing through the pigment chamber 11.

[0044] The nozzle body 6 includes a hollow cylindrical outer shell 14, through which the guide needle 8 is formed by a disc-shaped perforated plate 15, which is molded onto the inner surface 16 of the hollow cylindrical outer shell 14, and wherein the wall 17 of the disc-shaped perforated plate 15 slopes from the outer shell 14 toward the compression spring 4. In this way, the perforated plate 15 forming the guide needle 8 remains tilted, allowing the disc-shaped perforated plate to effectively transmit the pressure from the compression spring 4 to the outer shell 14.

[0045] exist Figures 5a to 7b In the illustrations, it should be assumed that: these illustrations show the pigment nozzle assembly 1 in an installed state, such that it can always be assumed that: the spring-loaded plunger (see Figure 2 According to the position of the trigger, it presses against the free end 3b of the needle 3, so that the compression spring 4 is as follows: Figure 5a , 6a As shown in 7a, they are compressed to different degrees. In this case, the compression spring 4 is in the closed position A ( Figure 5a The compression spring 4 is at its maximum extent when it is in the open position C. Figure 7a The degree of compression is minimized.

[0046] from Figures 5a to 7b Furthermore, it can be seen that the nozzle body 6 is designed to consist of two parts, including: a front nozzle body portion 18 with a nozzle opening 2 and a pigment inlet 7; and a rear nozzle body portion 20 with a guide needle 8. In this case, the front nozzle body portion 18 includes a rear flange 19, which includes two steps 19a and 19b. In this case, the rear nozzle body portion 20 includes a front flange 21, which includes two steps 21a and 21b. In this case, the end faces 19c and 21c of the corresponding outer steps 19a and 21a are abutted against each other and ultrasonically welded. In this case, the end faces 19d and 21d of the corresponding inner steps 19b and 21b are opposite each other with the seal 5 clamped therebetween (see [reference]). Figure 5b ).

[0047] The seal 5 is shaped to fit the needle 3, wherein the needle 3 includes a radially circumferential groove 5a for receiving the perforated disc-shaped seal 5 (see [link]). Figure 5bThe seal 5, after being elastically widened, engages with the radially circumferential groove. The needle 3 and the seal 5 together form a two-part sliding insert 22, which is capable of being within the nozzle body 6 and relative to the nozzle body 6 along the longitudinal axis L1 of the pigment nozzle assembly 1 (see...). Figure 5a )move.

[0048] The rear inner side 12b is formed by the guide needle 8. The front inner side 12a is formed in the area of ​​the rear flange 19 of the front nozzle body portion 18.

[0049] For example from Figure 7b As can be seen, the seal 5, designed as a membrane seal, is designed as a perforated disc-shaped seal with a perforation 51 in which the needle 3 is received. The thickness D5 of the seal 5 is small enough that the seal 5 can elastically deform or elastically bend, such that if the needle 3 is in the closed position A or the open position C, or in the position between the intermediate position B and the closed position A, or in the position between the intermediate position B and the open position C, the inner edge 52 surrounding the perforation 51 and the outer edge 53 surrounding the seal 5 are in planes E52 and E53 that are parallel to each other and spaced apart from each other.

[0050] exist Figure 8 The colorant nozzle assembly 901 is shown in a side sectional view. This colorant nozzle assembly 901 is a variant of the colorant nozzle assembly shown in the previous figures, differing only in the shape of the sliding insert 922. For the remaining components of the colorant nozzle assembly 901 and its basic operating principle, refer to the description of the colorant nozzle assembly shown in the previous figures.

[0051] The sliding insert 922 includes a needle 903 and a seal 905, which are designed as an integral component forming the sliding insert 922. In this case, the seal 905 is formed of plastic and is injection molded onto the needle 903.

[0052] According to another embodiment variant not shown, it may also be specified that the sliding insert is designed such that the seal is forcefully connected to the needle, wherein the needle is for this purpose glued or welded to the perforated disc-shaped seal.

[0053] In all implementation variations, the seal, designed as a membrane seal, undergoes rolling deformation as the needle moves. In this way, the pigment nozzle assembly does not experience the wear that occurs when using a sliding seal.

[0054] According to an embodiment variant not shown, it is also specified that the pigment nozzle assembly is connected to another component of the pigment spraying device in a material-fitting manner, and in particular to the front end.

[0055] List of reference numerals in the attached diagram:

[0056] 1 101 Pigment Nozzle Assembly

[0057] 2. Nozzle opening

[0058] 3 needles

[0059] 3b 3 backend

[0060] 3c 3 flange

[0061] 4 3 compression spring

[0062] 5. Seals

[0063] 5a Radial Circumferential Groove

[0064] 6 1 nozzle body

[0065] 7.6 Pigment input port

[0066] 8. Guide pin component

[0067] 9 6 interior space

[0068] 10 90 anteroom

[0069] 11 9 colorant room

[0070] The widened section of 12 11

[0071] 12a 12's front inner surface

[0072] 12b 12's rear inner surface

[0073] 13 Pigment nozzles

[0074] 14 Hollow cylindrical shell

[0075] 15. Dishe-shaped perforated plate

[0076] 16. Inner side

[0077] 17 15 wall

[0078] 18. Front nozzle body section

[0079] 19 Rear Flange

[0080] 19a 19 outer steps

[0081] 19b 19 inner steps

[0082] 19c 19a end face

[0083] 19d 19b end faces

[0084] 20 Rear nozzle body section

[0085] 21 Front flange

[0086] 21a Outer step

[0087] 21b Inner step

[0088] 21c 21a end face

[0089] End faces of 21d and 21b

[0090] 22 Sliding insert

[0091] 51 5 perforation

[0092] The inner edge of 5 around 52 51

[0093] 53 5 outer edge

[0094] 101 Pigment Injection Equipment

[0095] 201 101 front end

[0096] 202 Air Cap

[0097] 203 Locking Nut

[0098] 301 101 backend

[0099] 302 Electric Fan

[0100] 303 U's 301 entrance

[0101] 304 Trigger

[0102] 305 Spring-loaded plunger

[0103] 306 horizontal pin

[0104] 307 and 305 tension springs

[0105] 401 101 colorant container

[0106] 901 Pigment Nozzle Assembly (Implement Variant)

[0107] 903 needles

[0108] 905 Seals

[0109] 922 Sliding insert

[0110] A3 closing position

[0111] The middle position of B3

[0112] C 3 Opening position

[0113] Thickness of D5 5

[0114] E52, E53 52 or 53 plane

[0115] FS Pigment Jet

[0116] FSS Pigment Spray Jet

[0117] KF5 5 ring surface

[0118] KF5a front annular surface

[0119] KF5b rear annular surface

[0120] The longitudinal axis of L1 1

[0121] U Environment

[0122] VA11 volume of 11 in closed position A

[0123] The volume of VB11 at the middle position B is 11.

[0124] VC11 volume at open position C 11

[0125] x arrow direction

Claims

1. A pigment nozzle assembly (1; 901) for a pigment injection device (101) for generating a pigment spray jet (FS). - The pigment nozzle assembly (1; 901) includes a needle (3; 903), a nozzle body (6), and a seal (5; 905). - The nozzle body (6) includes a nozzle opening (2), a pigment inlet (7), and a guide needle (8), and - The seal (5; 905) divides the internal space (9) surrounded by the nozzle body (6) into a pre-chamber (10) and a pigment chamber (11). - Wherein the seal (5; 905) is fixedly connected to the needle (3; 903), - The seal (5; 905) is designed as a membrane seal and is fixedly connected to the nozzle body (6). - The internal space (9) includes a widened portion (12) facing the guide needle (8). Its features are, The pigment nozzle assembly (1; 901) includes a compression spring (4) which is clamped between the guide needle (8) and the flange (3c) of the needle (3; 903) such that the needle (3; 903) is pulled out from the nozzle opening (2).

2. The colorant nozzle assembly according to claim 1, Its features are, When the pigment nozzle (13) is closed, the needle (3; 903) deforms the seal (5; 905) toward the nozzle opening (2), so that the seal partially abuts against the front inner side (12a) of the widened portion (12), thereby minimizing the volume (VA11) of the pigment chamber (11).

3. The pigment nozzle assembly according to claim 1, Its features are, When the pigment nozzle (13) is fully open, the needle (3; 903) causes the seal (5; 905) to deform toward the guide needle (8), so that the seal abuts against the rear inner side (12b) of the widened portion (12).

4. The pigment nozzle assembly according to claim 1, Its features are, The nozzle body (6) includes a hollow cylindrical shell (14), wherein the guide needle (8) is formed by a disc-shaped perforated plate (15), which is molded onto the inner side (16) of the hollow cylindrical shell (14), wherein the wall (17) of the disc-shaped perforated plate (15) is inclined from the shell (14) toward the compression spring (4).

5. The colorant nozzle assembly according to claim 2, Its features are, The nozzle body (6) is designed to consist of two parts and includes: a front nozzle body portion (18) with the nozzle opening (2) and the pigment inlet (7); and a rear nozzle body portion (20) with the guide needle (8), wherein the front nozzle body portion (18) includes a rear flange (19) with two steps (19a, 19b), wherein the rear nozzle body portion (20) includes a front flange (21) with two steps (20a, 20b), wherein the end faces (19c, 21c) of the corresponding outer steps (19a, 21a) are abutted against each other or manufactured by means of so-called inserts for subsequent plastic injection molding encapsulation or screwing, or pasting or held together by at least one clamp, and wherein the end faces (19d, 21d) of the corresponding inner steps (19b, 21b) are opposite each other when the seal (5; 905) is clamped therebetween.

6. The pigment nozzle assembly according to any one of claims 1 to 5, Its features are, The needle (903) and the seal (905) are integrally formed, wherein the seal (905) is formed of plastic and is injection molded onto the needle (903).

7. The colorant nozzle assembly according to any one of claims 1 to 5, Its features are, The seal (5) is connected to the needle (3) in a shape-fitting manner, wherein the needle (3) includes a radial circumferential groove (5a) for receiving the perforated disc-shaped seal (5), which is snapped into the radial circumferential groove after being elastically widened.

8. The colorant nozzle assembly according to any one of claims 1 to 5, Its features are, The seal is forcefully connected to the needle, wherein the needle is bonded or welded to the perforated disc-shaped seal.

9. The pigment nozzle assembly according to claim 3, Its features are, The rear inner surface (12b) is formed by the guide pin (8).

10. The pigment nozzle assembly according to claim 5, Its features are, The front inner side (12a) is formed in the region of the rear flange (19) of the front nozzle body portion (18).

11. The pigment nozzle assembly according to claim 5, Its features are, The end faces (19c, 21c) of the corresponding outer steps (19a, 21a) are ultrasonically welded to each other.

12. A pigment spraying device (101) for generating a pigment spray jet (FS), the pigment spraying device comprising a front end (201), a rear end (301), a pigment container (401), and a pigment nozzle assembly (1; 901). Its features are, The pigment nozzle assembly (1; 901) is designed according to any one of claims 1 to 11.

13. The pigment spraying device according to claim 12, Its features are, The pigment nozzle assembly (1; 901) is housed between the front end (201) and the rear end (301) such that the pigment nozzle assembly (1; 901) is connected to the front end (201) only in a form-fitting and / or force-fitting manner, and to the rear end (301) only in a form-fitting and / or force-fitting manner.

14. The pigment spraying device according to claim 12 or 13, Its features are, The pigment spraying device includes a fan (302) for generating airflow.

Images