Cup head structure of powder rotary cup

Abstract

The utility model relates to the technical field of rotary cup heads, and discloses a powder rotary cup head structure which comprises a cup head body, one side of the cup head body is open, an inner cavity of the open portion is conical to form a powder coating casting conical surface, a cup head installation body is installed on the side, away from the open portion, of the cup head body, and a powder coating casting conical surface is formed in the cup head installation body. The cup head body is connected with an external driving shaft, the external driving shaft drives the cup head body to rotate when rotating, and a dispersing disc is fixedly installed on the other side of the cup head body. The structural design of the cup head is optimized, a proper angle is formed between powder coating and a workpiece to be coated after the powder coating leaves the cup head through the arrangement of the powder coating casting conical surface of the cup head main body, the powder coating is uniformly dispersed, the speed of part of the powder coating perpendicular to the direction of the workpiece to be coated is kept, the opening degree of forming air of a high-speed rotary cup can be reduced, and the forming efficiency of the high-speed rotary cup is improved. Energy is saved; and meanwhile, the rebound condition after the powder coating is in contact with the coated workpiece is weakened, and the coating utilization rate and the spraying efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of rotary cup head technology, and in particular to a powder rotary cup head structure. Background Technology

[0002] The working principle of a powder rotary cup is to atomize the powder coating by using a high-speed rotating disc or nozzle to propel the powder coating out under centrifugal force.

[0003] While this atomization method can produce very fine and uniform powder particles, it requires a reasonable design of the powder projection angle. Too small a projection angle will cause the powder coating to be too concentrated, reducing the spraying efficiency and making it easy for the powder coating to bounce back after contacting the workpiece, reducing the powder utilization rate. On the other hand, too large a projection angle requires the application of a large amount of forming air to accelerate the powder coating in order to complete the spraying operation, which will result in waste of resources and dispersion of powder coating.

[0004] In addition, when the powder rotary cup head rotates at high speed, it rubs against the powder coating particles at high speed, and the powder coating is very easy to solidify onto the inner wall of the cup head. Therefore, the entire cup head is made of composite materials. That is, the installation and connection parts are made of high-strength materials, while the inner wall of the cup head in contact with the powder coating needs to be made of materials with surface properties such as low coefficient of friction, good chemical stability, and non-stick. The manufacturing process is relatively complex and costly, and it is easy to fall off under the action of high-speed centrifugal rotation. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a powder rotary cup head structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A powder rotary cup head structure includes a cup head body, one side of which is open and the inner cavity of the open part is conical to form a powder coating projection cone surface. A cup head mounting body is installed on the side of the cup head body away from the open part and is connected to an external drive shaft. When the external drive shaft rotates, it drives the cup head body to rotate. A dispersion disk is fixedly installed on the other side of the cup head body, and there is a gap between it and the powder coating projection cone surface.

[0008] Preferably, the cone opening angle is 45°-60°, so that the powder coating has both tangential and vertical initial velocities when it leaves the cup head.

[0009] Preferably, the cup head mounting body and the cup head body are axially fixed by an interference fit, and circumferential rotation is prevented by an anti-rotation fixing structure, thus reducing assembly difficulty.

[0010] Preferably, the anti-rotation fixing structure is a plum blossom-shaped limiting groove, which is formed on the surface of the cup head body, and the shape of the cup head mounting body is adapted to the shape of the plum blossom-shaped limiting groove.

[0011] Preferably, the dispersion disc is connected to the cup head body by a pin for uniformly dispersing the powder coating.

[0012] Preferably, three pins are provided, and the three pins are evenly distributed on the side of the dispersion disc near the cup head body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention optimizes the cup head structure design. By setting the powder coating projection cone surface of the cup head body, the powder coating forms an appropriate angle with the workpiece after leaving the cup head. While dispersing the powder coating evenly, it retains a portion of the velocity perpendicular to the workpiece, which can reduce the opening of the high-speed rotating cup forming air and save energy. At the same time, it reduces the rebound of the powder coating after contacting the workpiece, improving the coating utilization rate and spraying efficiency.

[0015] This utility model effectively connects the cup head mounting body and the cup head body together through the cooperation of an anti-detachment snap-fit ​​structure and an anti-rotation fixing structure, thereby ensuring that the cup head body and the cup head mounting body are firmly connected and will not loosen, and reducing the difficulty of previous composite processing and assembly. Attached Figure Description

[0016] Figure 1 This is a front view of a powder rotary cup head structure proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of an anti-rotation fixing structure for a powder rotary cup head structure proposed in this utility model.

[0018] In the diagram: 1. Cup head body; 2. Cup head mounting body; 3. Dispersion disc; 4. Pin; 5. Powder coating projectile cone; 6. Gap; 7. Powder nozzle; 8. Anti-rotation fixing structure. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1 and Figure 2A powder rotary cup head structure includes a cup head body 1, one side of which is open and the inner cavity of the open part is conical, forming a powder coating projection cone surface 5. A cup head mounting body 2 is installed on the side of the cup head body 1 away from the open part and is connected to an external drive shaft. When the external drive shaft rotates, it drives the cup head body 1 to rotate. A dispersion disk 3 is fixedly installed on the other side of the cup head body 1, and there is a gap 6 between the dispersion disk 3 and the powder coating projection cone surface 5. The dispersion disk 3 is connected to the cup head body 1 by three pins, and the three pins are evenly distributed on the side of the dispersion disk 3 near the cup head body 1. The dispersion disk 3 is used to evenly disperse the powder coating in a certain direction.

[0021] In use, the powder coating enters the inner cavity of the cup head body 1 through the powder spray pipe 7 installed in the inner cavity of the cup head mounting body 2 (the powder spray pipe 7 is installed in the inner cavity of the cup head mounting body 2 through an inner liner, and its two ends are connected to the output pipe of the powder conveying device and the inner cavity of the cup head body 1 respectively through sealed bearings; the external drive shaft is a hollow shaft, one end of which is detachably installed on the outside of the cup head mounting body 2 through a thread; the powder is conveyed from the inner cavity of the hollow shaft into the powder spray pipe 7 (not shown in the figure, but only a method disclosed and implemented in the prior art is provided here; how to convey the powder and rotate the cup head body 1 is determined according to actual needs; this application only improves the cup head structure)). After being blocked by the dispersing disc 3, the original direction of motion is changed. Under the action of centrifugal force, the powder coating accelerates along the powder coating projection cone 5 inside the cup head body 1 and moves away from the cup head tangentially towards the workpiece. Compared with the prior art, this application optimizes the cup head structure design. By setting the powder coating projection cone 5 of the cup head body 1, the powder coating forms an appropriate angle with the workpiece after leaving the cup head. While dispersing the powder coating evenly, it retains a part of the velocity perpendicular to the workpiece, which can reduce the opening of the high-speed rotating cup forming air and save energy. At the same time, it reduces the rebound of the powder coating after contact with the workpiece, and improves the coating utilization rate and spraying efficiency.

[0022] In this embodiment, the cone opening angle is 45°, so that the powder coating has both tangential and vertical initial velocities when it leaves the cup head.

[0023] In this embodiment, the cup head mounting body 2 and the cup head body 1 are axially fixed by an interference fit, and circumferential rotation is prevented by an anti-rotation fixing structure 8, which reduces the assembly difficulty.

[0024] In this embodiment, the anti-rotation fixing structure 8 is a plum blossom-shaped limiting groove, which is formed on the surface of the cup head body 1. The shape of the cup head mounting body 2 is adapted to the shape of the plum blossom-shaped limiting groove.

[0025] This utility model effectively connects the cup head mounting body 2 and the cup head body 1 together through the cooperation of the anti-detachment snap-fit ​​structure and the anti-rotation fixing structure 8, thereby ensuring that the cup head body 1 and the cup head mounting body 2 are firmly connected and do not loosen, and reducing the difficulty of previous composite processing and assembly.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A powder rotary cup head structure, comprising a cup head body, characterized in that: One side of the cup head body is open, and the inner cavity of the open part is conical, forming a powder coating projection cone surface. A cup head mounting body is installed on the side of the cup head body away from the open part, which is connected to an external drive shaft. When the external drive shaft rotates, it drives the cup head body to rotate. A dispersion disk is fixedly installed on the other side of the cup head body, and there is a gap between it and the powder coating projection cone surface.

2. The powder rotary cup head structure according to claim 1, characterized in that: The cone opening angle is 45°-60°, so that the powder coating has both tangential and vertical initial velocities when it leaves the cup head.

3. The powder rotary cup head structure according to claim 1, characterized in that: The cup head mounting body and the cup head body are axially fixed by an interference fit, and circumferential rotation is prevented by an anti-rotation fixing structure, reducing assembly difficulty.

4. The powder rotary cup head structure according to claim 3, characterized in that: The anti-rotation fixing structure is a plum blossom-shaped limiting groove, which is formed on the surface of the cup head body. The shape of the cup head mounting body is adapted to the shape of the plum blossom-shaped limiting groove.

5. The powder rotary cup head structure according to claim 2, characterized in that: The dispersion disc is connected to the cup head body by a pin, which is used to uniformly disperse the powder coating.

6. The powder rotary cup head structure according to claim 5, characterized in that: There are three pins, and the three pins are evenly distributed on the side of the dispersion plate near the cup head body.

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