Spraying structure of colorful spray gun

Abstract

The utility model provides a spraying structure of a colorful spray gun, which comprises a gun body, a nozzle assembly is arranged at the output end of the gun body, a trigger is hinged on the outer wall surface of the gun body, a discharging channel and an air outlet channel are arranged in the nozzle assembly, the output end of the gun body is further connected with a coating connector, and an air conveying channel and an air inlet channel are arranged in the gun body. The gun body is internally provided with a hollow gun needle piece and an adjusting assembly, the adjusting assembly and the trigger are matched to drive the gun needle piece to move axially, and then the gun needle piece is switched between a first state and a second state. According to the spray gun, the structure is optimized, a one-inlet and two-outlet double-air-source spraying mode is adopted, and compared with a conventional spray gun which only uses one air source for spraying, the spray gun is more uniform and smooth in paint spraying and good in spraying effect.

Description

Technical Field

[0001] The utility model relates to a spraying structure of a multi-color spray gun. Background Art

[0002] Multicolor paint is a multicolor mixed paint made of multiple single-color paints coated with protective glue to form granules, so that the colors are incompatible with each other. It can spray multiple colors with one gun. However, since it is composed of multiple single-color soft particles, the construction requirements are relatively high. The structure of the multicolor spray gun currently used is not perfect enough. Usually, there is only one air source for spraying, and the spraying of the paint is not uniform and smooth; therefore, the existing technology needs to be improved and developed. Summary of the invention

[0003] In view of the shortcomings existing in the above problems, the utility model provides a spraying structure of a multi-color spray gun.

[0004] To achieve the above-mentioned purpose, the utility model provides a spraying structure of a multi-color spray gun, comprising a gun body, a nozzle assembly is provided on the output end of the gun body, a trigger is hinged on the outer wall surface, a discharge channel and an air outlet channel are provided in the nozzle assembly, the output end of the gun body is also connected to a paint joint, an air supply channel and an air inlet channel are provided inside, the air supply channel is communicated with the air outlet channel, a hollow gun needle piece and an adjustment assembly are provided in the gun body, the adjustment assembly and the trigger cooperate to drive the gun needle piece to move axially, thereby causing the gun needle piece to switch between a first state and a second state; wherein, when the gun needle piece is in the first state, one end of the gun needle piece and the air supply channel are not communicated with the air inlet channel, and the other end of the gun needle piece and the discharge channel are not communicated with the paint joint; when the gun needle piece is in the second state, one end of the gun needle piece and the air supply channel are communicated with the air inlet channel, and the other end of the gun needle piece is communicated with the paint joint and the discharge channel.

[0005] Furthermore, the gun body is provided with an installation cavity which is communicated with the gas transmission channel and the air inlet channel, a needle plug sleeve is fixedly provided on the inner wall of the installation cavity, a gas transmission hole is provided on the side wall of the needle plug sleeve corresponding to the gas transmission channel, the gun needle part is divided into a gun needle head and a gun needle rod, the rear end of the gun needle rod is passed through the needle plug sleeve and is gap-sealed with the needle plug sleeve, and an air inlet hole is provided on the side wall of the gun needle rod.

[0006] Furthermore, the gun needle rod is provided with a sealing inclined surface on the side wall behind the air inlet hole, and the needle plug sleeve is correspondingly provided with an annular mounting groove, and a sealing ring is provided in the mounting groove.

[0007] Furthermore, a mounting opening is opened on one side of the gun body for installing the adjustment component into the mounting cavity. The adjustment component includes an adjustment piece, an adjustment rod, and a first spring. The adjustment piece is detachably fixed on the mounting opening. One end of the adjustment rod is fixedly connected to the rear end of the needle rod, and the other end passes through the adjustment piece. The first spring is sleeved on the adjustment rod and cooperates with the trigger to drive the needle piece to move axially.

[0008] Furthermore, the adjusting member is divided into a fixed portion and a rotating portion, and the rotating portion is configured to be able to rotate around the fixed portion and move along the axial direction of the fixed portion, thereby adjusting the axial relative position between the adjusting rod and the rotating portion.

[0009] Furthermore, a material storage chamber communicated with the coating joint is provided in the output end of the gun body, and an air outlet is provided at the end of the gun needle head.

[0010] Furthermore, the nozzle assembly includes an air cap arranged on the outer wall surface of the output end of the gun body, a nozzle arranged in the air cap, and a nozzle seat connecting the nozzle and the gun body, the nozzle is respectively provided with a discharge port and multiple air outlets, the nozzle seat is respectively provided with a primary through hole and multiple secondary through holes, the discharge port and the primary through hole are connected to form a discharge channel, and the air outlet and the secondary through hole are connected to form an air outlet channel.

[0011] Furthermore, the material outlet, the primary through hole, and the air outlet are arranged coaxially, and the air outlet is evenly arranged around the material outlet.

[0012] Furthermore, a valve device is provided in the gun body, and the movable end of the valve device extends out of the gun body and abuts against the inner wall of the trigger; the gun needle passes through the trigger, and both are respectively provided with an abutment surface and a pressing part, and after the trigger rotates a certain angle, the pressing part contacts the abutment surface.

[0013] Furthermore, a valve adjustment device is provided at the bottom of the gun body.

[0014] The beneficial effects of the utility model compared to the prior art are: the utility model optimizes the structure, and adopts a dual-gas source spraying method with one inlet and two outlets. Compared with the conventional spray gun spraying method using only one gas source, the paint is sprayed more evenly and smoothly, and the spraying effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model discloses a sectional view of a spraying structure of a multi-color spray gun. DETAILED DESCRIPTION

[0016] like Figure 1As shown, a spraying structure of a multi-color spray gun of an embodiment of the utility model comprises a gun body 10, a nozzle assembly 1 is provided on the output end of the gun body 10, the nozzle assembly 1 comprises an air cap 2 arranged on the outer wall surface of the output end of the gun body 10, a nozzle 3 arranged in the air cap 2, and a nozzle seat 4 connecting the nozzle 3 and the gun body 10, the nozzle 3 is respectively provided with a discharge port 31 and a plurality of air outlets 32, the nozzle seat 4 is respectively provided with a primary through hole 41 and a plurality of secondary through holes 42, the discharge port 31 and the primary through hole 41 are communicated with each other to form a discharge channel 5, and the air outlet 32 ​​and the secondary through hole 42 are communicated with each other to form an air outlet channel 6.

[0017] Furthermore, if Figure 1 In this embodiment, the gun body 10 is provided with a gas supply channel 101 and an air intake channel 102. The gas supply channel 101 is communicated with the gas outlet channel 6, and the air intake channel 102 is connected to an external gas source. At the same time, a valve adjustment device 18 is provided at the bottom of the gun body 10, and the valve adjustment device 18 is used to adjust the air intake flow in the air intake channel 102.

[0018] Furthermore, if Figure 1 As shown, a trigger 7 is hinged on the outer wall of the gun body 10 in this embodiment, and a paint joint 8 is connected to the output end, and the paint joint 8 is connected to the external paint bucket. At the same time, a hollow gun needle 9 and an adjustment component 13 are arranged in the gun body 10. The adjustment component 13 and the trigger 7 cooperate to drive the gun needle 9 to move axially, thereby causing the gun needle 9 to switch between the first state and the second state; wherein, when the gun needle 9 is in the first state, one end of the gun needle 9 and the air delivery channel 101 are not connected to the air inlet channel 102, and the other end of the gun needle 9 and the discharge channel 5 are not connected to the paint joint 8; When the gun needle member 9 is in the second state, one end of the gun needle member 9 and the air supply channel 101 are both connected to the air inlet channel 102, and the other end of the gun needle member 9 is connected to the paint joint 8 and the discharge channel 5, so that the gas in the air inlet channel 102 can be discharged from the discharge port 31 through the gun needle member 9 to the discharge channel 5 together with the paint in the paint bucket, and can be discharged from the discharge port 31 through the air supply channel 101 to the air outlet channel 6 and discharged from the air outlet 32. The pressure device in the paint bucket is reduced, and the air pressure from the gun needle member 9 to the discharge channel 5 can be directly used to absorb the paint in the paint bucket, thereby optimizing the structure of the spray gun.

[0019] Furthermore, if Figure 1As shown, the gun body 10 in this embodiment is provided with an installation cavity 103 communicating with the gas delivery channel 101 and the air inlet channel 102, a needle plug sleeve 11 is fixedly provided on the inner wall of the installation cavity 103, and a gas delivery hole 111 is provided on the side wall of the needle plug sleeve 11 corresponding to the gas delivery channel 101, the gun needle member 9 is divided into a gun needle head 91 and a gun needle rod 92, the rear end of the gun needle rod 92 is penetrated into the needle plug sleeve 11 and is sealed with the gap therewith, an air inlet hole 921 is provided on the side wall of the gun needle rod 92, a material storage cavity 104 communicating with the paint joint 8 is provided in the output end of the gun body 10, an air outlet hole 911 is provided at the end of the gun needle head 91, and a sealing inclined surface 922 is provided on the side wall behind the air inlet hole 921 of the gun needle rod 92, and a ring is provided on the needle plug sleeve 11 correspondingly shaped mounting groove, in which a sealing ring 12 is arranged; in the first state, the trigger 7 is not subjected to force, and the adjusting assembly 13 acts on the gun needle member 9 so that its sealing inclined surface 922 abuts against the sealing ring 12, and the outer wall surface of the gun needle head 91 blocks the primary through hole 41, that is, the air inlet hole 921 and the air delivery hole 111 are not connected to the mounting cavity 103, and the air outlet hole 911 and the discharge channel 5 are not connected to the storage cavity 104; in the second state, the trigger 7 is subjected to force to drive the gun needle member 9 to move backward, thereby driving the sealing inclined surface 922 away from the sealing ring 12, and the outer wall surface of the gun needle head 91 away from the primary through hole 41, so that the air inlet hole 921, the air delivery hole 111 and the mounting cavity 103 are connected, and the air outlet hole 911, the discharge channel 5 and the storage cavity 104 are connected.

[0020] Furthermore, if Figure 1 As shown, a mounting opening is provided on one side of the gun body 10 in the present embodiment for installing the adjustment assembly 13 into the mounting cavity 103. The adjustment assembly 13 includes an adjustment member 14, an adjustment rod 15, and a first spring 16. The adjustment member 14 is detachably fixed on the mounting opening. One end of the adjustment rod 15 is fixedly connected to the rear end of the needle rod 92, and the other end is passed into the adjustment member 14. The first spring 16 is sleeved on the adjustment rod 15 and cooperates with the trigger 7 to drive the needle member 9 to move axially. At the same time, the adjustment member 14 is divided into a fixed portion 141 and a rotating portion 142. The rotating portion 142 is configured to be able to rotate around the fixed portion 141 and move along the axial direction of the fixed portion 141, thereby adjusting the axial relative position between the adjustment rod 15 and the rotating portion 142, so as to facilitate the control of the relative opening between the sealing inclined surface 52 and the sealing ring 9.

[0021] Furthermore, if Figure 1 As shown, the discharge port 31, the primary through hole 41, and the air outlet 911 in this embodiment are arranged coaxially, and the air outlet 32 ​​is evenly arranged around the discharge port 31, so that the paint is sprayed more evenly.

[0022] Furthermore, if Figure 1As shown, in this embodiment, a valve device 17 is provided in the gun body 10, and the movable end of the valve device 17 extends out of the gun body 10 and abuts against the inner wall of the trigger 7; the gun needle member 9 passes through the trigger 7, and the two are respectively provided with abutting surface 923 and a pressing portion 71. After the trigger 7 rotates a certain angle a, the pressing portion 71 contacts the abutting surface 923, that is, the trigger 7 is rotated by force to first control the valve device 17 to open the air inlet channel 102, so that the gas in the air inlet channel 102 is filled in the installation cavity 103. After the trigger 7 is continuously rotated until its rotation angle is greater than a, the trigger 7 drives the gun needle member 9 to move backward, and the gun needle member 9 is changed to the second state and the gas filled in the installation cavity 1022 can quickly enter the air inlet hole 921 and the air delivery hole 111, thereby ensuring the smoothness of the gas ejected by the spray gun.

[0023] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A spraying structure of a multi-color spray gun, comprising a gun body (10), a nozzle assembly (1) being provided on the output end of the gun body (10), and a trigger (7) being hinged on the outer wall surface, characterized in that: The nozzle assembly (1) is provided with a material discharge channel (5) and an air outlet channel (6). The output end of the gun body (10) is also connected to a coating material joint (8). An air supply channel (101) and an air inlet channel (102) are provided inside the gun body (10). The air supply channel (101) is communicated with the air outlet channel (6). A hollow gun needle member (9) and an adjustment assembly (13) are provided inside the gun body (10). The adjustment assembly (13) and the trigger (7) cooperate to drive the gun needle member (9) to move axially, thereby causing the gun needle member (9) to move in a first state. The gun needle member (9) can be switched between a first state and a second state; wherein, when the gun needle member (9) is in the first state, one end of the gun needle member (9) and the gas delivery channel (101) are not in communication with the gas inlet channel (102), and the other end of the gun needle member (9) and the discharge channel (5) are not in communication with the coating material joint (8); when the gun needle member (9) is in the second state, one end of the gun needle member (9) and the gas delivery channel (101) are in communication with the gas inlet channel (102), and the other end of the gun needle member (9) is in communication with the coating material joint (8) and the discharge channel (5).

2. The spraying structure of a multi-color spray gun according to claim 1, characterized in that: The gun body (10) is provided with a mounting cavity (103) which is in communication with the gas delivery channel (101) and the gas inlet channel (102); a needle plug sleeve (11) is fixedly provided on the inner wall of the mounting cavity (103); a gas delivery hole (111) is provided on the side wall of the needle plug sleeve (11) corresponding to the gas delivery channel (101); the gun needle member (9) is divided into a gun needle head (91) and a gun needle rod (92); the rear end of the gun needle rod (92) is inserted into the needle plug sleeve (11) and is gap-sealed with the needle plug sleeve (11); and a gas inlet hole (921) is provided on the side wall of the gun needle rod (92).

3. The spraying structure of a multi-color spray gun according to claim 2, characterized in that: The gun needle rod (92) is provided with a sealing inclined surface (922) on the side wall behind the air inlet hole (921), and the needle plug sleeve (11) is correspondingly provided with an annular mounting groove, and a sealing ring (12) is provided in the mounting groove.

4. A spraying structure of a multi-color spray gun according to claim 2 or 3, characterized in that: A mounting opening is provided on one side of the gun body (10) for mounting an adjustment assembly (13) in the mounting cavity (103). The adjustment assembly (13) comprises an adjustment member (14), an adjustment rod (15), and a first spring (16). The adjustment member (14) is detachably fixed to the mounting opening. One end of the adjustment rod (15) is fixedly connected to the rear end of the needle rod (92), and the other end is inserted into the adjustment member (14). The first spring (16) is sleeved on the adjustment rod (15) and cooperates with the trigger (7) to drive the needle member (9) to move axially.

5. The spraying structure of a multi-color spray gun according to claim 4, characterized in that: The adjusting member (14) is divided into a fixed portion (141) and a rotating portion (142), and the rotating portion (142) is configured to be able to rotate around the fixed portion (141) and move along the axial direction of the fixed portion (141), thereby adjusting the axial relative position between the adjusting rod (15) and the rotating portion (142).

6. The spraying structure of a multi-color spray gun according to claim 2, characterized in that: A material storage chamber (104) communicating with a coating material joint (8) is provided in the output end of the gun body (10), and an air outlet hole (911) is provided at the end of the gun needle head (91).

7. The spraying structure of a multi-color spray gun according to claim 6, characterized in that: The nozzle assembly (1) comprises an air cap (2) arranged on the outer wall surface of the output end of the gun body (10), a nozzle (3) arranged in the air cap (2), and a nozzle seat (4) connecting the nozzle (3) and the gun body (10); the nozzle (3) is respectively provided with a material discharge port (31) and a plurality of gas outlets (32); the nozzle seat (4) is respectively provided with a primary through hole (41) and a plurality of secondary through holes (42); the material discharge port (31) and the primary through hole (41) are communicated with each other to form a material discharge channel (5); and the gas outlet (32) and the secondary through hole (42) are communicated with each other to form a gas outlet channel (6).

8. The spraying structure of a multi-color spray gun according to claim 7, characterized in that: The material outlet (31), the primary through hole (41), and the air outlet (911) are arranged coaxially, and the air outlet (32) is evenly arranged around the material outlet (31).

9. The spraying structure of a multi-color spray gun according to claim 1, characterized in that: The gun body (10) is provided with a valve device (17), and a movable end of the valve device (17) extends out of the gun body (10) and abuts against an inner wall of the trigger (7); the gun needle (9) passes through the trigger (7), and both are provided with abutting surfaces (923) and pressing portions (71), respectively; after the trigger (7) rotates a certain angle, the pressing portion (71) contacts the abutting surfaces (923).

10. The spraying structure of a multi-color spray gun according to claim 1, characterized in that: A valve adjustment device (18) is provided at the bottom of the gun body (10).

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