CN2710761Y - Rotary cup structure of electrostatic coating machine - Google Patents

Abstract

One end of the rotary cup can receive the injection of the coating and high-pressure gas at the same time, and then the coating is sprayed on the surface of the coated object from the other end through the high-pressure gas; the coating material is micronized after the action of centrifugal force rotating at high speed in the inner cup body, and then the micronized coating material is brought to the surface of a coated object by the high-pressure gas; the utility model discloses see through the design of runner, let high-pressure gas pour into in the cup after, can guide in the air guide runner of the clearance deposit of shroud and interior cup to along the tangential direction blowout of the outer anchor ring terminal edge of interior cup, evenly take the coating toward being scribbled the object surface, and provide further atomization to coating, promote the quality of application operation by a wide margin.

Description

Rotary cup structure of electrostatic coating machine

technical field

The utility model relates to a rotary cup structure of an electrostatic coating machine, which uses the centrifugal force generated by high-speed rotation to atomize the coating to be sprayed, and then sprays the coating on the surface of the object to be coated through high-pressure atomizing wind.

Background technique

Electrostatic coating machine is a kind of equipment that emphasizes that the paint can be atomized and sprayed on the surface of the object to be coated, so that the surface of the object to be coated can obtain high-quality coating film and adhesion rate.

The reason why the high-quality spraying effect can be obtained is that the electrostatic coating machine is combined with a rotary cup spray head. The rotary cup uses the principle of pneumatics to generate high-speed rotation, so that the paint can be atomized by the centrifugal force in the rotary cup first, and then Then the paint is evenly sprayed on the surface of the object to be coated by the atomizing wind.

The designs seen in the past are to set the spray outlet of the atomizing wind at the rear end of the rotary cup, and then use high pressure to blow the atomizing wind to the outer edge of the front end of the rotary cup, so that the paint thrown from the rotary cup can be Receive the atomization wind and bring it to the surface of the object to be coated.

However, such a design is still not ideal, because the air path of the atomizing wind sprayed from the rear end of the rotary cup is not restricted, so part of the sprayed air volume will spread outwards, so that it reaches the front end of the rotary cup At this time, only part of the air volume will provide atomization for the paint, which cannot be effectively used, and the adhesion of the paint is relatively poor; in addition, because the atomized wind cannot be sprayed from the tangential direction of the cup edge after spraying , so the paint will produce a hollow ring effect with a large spray width, resulting in that the middle of the spray surface cannot be sprayed uniformly, and the staggered operation must be repeated, which not only causes waste of paint, but also causes uneven thickness of paint on the surface of the object to be coated. The phenomenon seriously affects the quality.

Utility model content

In view of this, the main purpose of this utility model is to propose a rotary cup structure of an electrostatic coating machine, which has a better atomization effect and can obtain a high and uniform adhesion rate on the surface of the object to be coated.

The utility model provides a rotary cup structure of an electrostatic coating machine, which can be driven and rotated at a high speed, and is characterized in that the rotary cup includes:

An inner cup body has a dish part, and a paint injection pipe is axially extended from the bottom end of the dish part to pour paint, and the inside of the dish part is a conical recess, and is connected with the paint injection pipe by a plurality of first diversion holes through, allowing the paint to flow evenly into the conical recess, and the centrifugal force generated by the high-speed rotation makes the paint micronized, and a gas conduit is extended in the axial direction of the paint injection pipe for injecting high-pressure gas, and is connected to the the outer edge of the inner cup; and

An outer cover, a sleeve hole is provided at the axial bottom to be sleeved on the outer edge of the paint injection pipe, and a guide flow channel extending to the end edge is formed with the outer edge of the inner cup, so that through the second diversion hole The high-pressure gas injected into the guide flow channel is ejected along the tangential direction of the end edge of the outer ring surface of the dish part.

Wherein the outer edge of the paint injection pipe is formed with a stepped retaining edge to limit the depth of the outer cover cover being sleeved on the paint injection pipe.

Wherein the end of the paint injection pipe also has a joint portion for a fixing ring to be assembled on it to tightly combine the outer cover and the inner cup body.

Wherein the fixing ring and the joint part are provided with internal and external threads which can be screwed together.

Wherein the inner cup and the outer cover are radially locked by at least one bolt.

In this way, the high-pressure gas can be guided by the guide flow channel and sprayed along the tangential direction of the outer ring surface of the inner cup, so as to provide more effective atomization of the paint and greatly improve the quality of the painting operation. .

Description of drawings

In order to further illustrate the technical content of the present utility model, below in conjunction with embodiment and accompanying drawing, describe in detail as follows, wherein:

Fig. 1 is the three-dimensional exploded view of the rotary cup structure revealed by the utility model;

Fig. 2 is the combined sectional view of the rotary cup of the present utility model;

Fig. 3 is the schematic diagram that the utility model rotary cup structure is combined on the electrostatic coating machine;

Fig. 4 is a schematic diagram of a usage example of the rotary cup structure of the present invention.

Detailed ways

Fig. 1 is the three-dimensional exploded view of the preferred embodiment of the rotary cup disclosed by the utility model; it mainly includes an inner cup body 10 and an outer cover 20 socketed on the outer edge of the inner cup body 10, wherein the inner cup body 10 and the outer cover The cover 20 can be an integrated structure, or can be two detachable components as shown in the figure, and a fixed ring 30 locks the combined inner cup body 10 and outer cover 20 to form an integral structure.

Please cooperate with that shown in Figure 2 at the same time, one end of the inner cup body 10 has a dish portion 11, and a paint injection pipe 12 extends axially from the bottom end of the dish portion 11 to pour the paint; wherein the dish portion 11 has a conical recess 14 , and communicate with the paint injection pipe 12 with a plurality of first distribution holes 15, so that the material injected from the paint injection pipe 12 can evenly flow into the conical recess 14. In addition, a gas conduit 13 extends axially inside the paint injection pipe 12 for injecting high-pressure gas, and the gas conduit 13 communicates with the outer edge of the inner cup body 10 through a plurality of second distribution holes 16 .

As for the outer cover 20, it is a dish-shaped body with an inner diameter greater than the outer diameter of the inner cup body 10. A set of joint holes 21 are provided at the axial bottom to be sleeved on the outer edge of the paint injection pipe 12, and connected to the outer edge of the inner cup body 10. A guide flow channel 40 extending to the end edge is formed, so that the high-pressure gas injected into the guide flow channel 40 through the second split hole 16 is discharged along the annular gap 41 formed between the end edge of the outer ring surface of the dish part 11 and the outer cover 20 .

As shown in the figure, a stepped retaining edge 121 is formed on the outer edge of the paint injection pipe 12, and the stepped retaining edge 121 is larger than the diameter of the socket hole 21 of the outer cover 20, thereby serving as a combination of the outer cover 20 on the inner cup body 10. The abutting surface limits the depth at which the outer cover 20 is sleeved on the paint injection pipe 12 . In addition, there is a junction 122 at the end of the paint injection pipe 12, and a section of external thread 123 is formed on the outer edge of the junction 122, so that the fixed ring 30 that is matched with the internal thread 31 can be bolted to the paint injection by screwing. The outer edge of the tube 12 is close to the bottom of the outer cover 20 so that the outer cover 20 and the inner cup body 10 are closely combined. During implementation, in order to enhance the fixing effect between the inner cup body 10 and the outer cover 20 , at least one bolt 50 may be used to lock from the side edge in the radial direction.

As a result, as shown in Figure 3, the rotary cup of the present utility model is installed on the electrostatic coating machine 60, mainly by the gas conduit 13 being connected to the rotating shaft 61 of the electrostatic coating machine 60, so that the whole The rotary cup can rotate at high speed synchronously after the rotary shaft 61 is driven. As shown in the figure, the electrostatic coating machine 60 is provided with a paint inlet 62, a rotating air inlet 63 and an atomizing air inlet 64, wherein the paint inlet 62 extends to the paint injection pipe 12 through a conduit 621, so that the paint can be poured After the paint inlet 62, it can be injected into the paint injection pipe 12 through the conduit 621, so that the paint flows into the conical notch 14 through the first split hole 15; and the high-pressure gas injected from the atomizing air inlet 64 will rotate along the hollow. The inside of the shaft 61 is introduced into the gas conduit 13 , so that the high-pressure gas can enter the guide flow channel 40 through the second distribution hole 16 , and finally be discharged from the annular gap 41 .

Therefore, as shown in Figure 4, when the high-pressure gas 71 starts to inject into the rotating air inlet 63, the rotating cup will be driven synchronously with the rotating shaft 61 to rotate at a high speed, so that the paint 72 will appear in the conical recess 14 due to centrifugal force. After being micronized, it is thrown out, and finally the high-pressure gas ejected from the annular gap 41 will bring the paint to the surface of the object to be coated; because the high-pressure gas ejected from the annular gap 41 will flow The tangential direction of the end edge advances at a high speed and concentrates, so that the paint thrown out of the rim of the rotary cup is immediately brought to the surface 80 of the object to be coated, and the paint is atomized again.

Although the spraying width produced by utilizing the rotary cup of the utility model to spray paint is relatively small, it will not produce the hollow effect as known in the spraying width. It can be seen that, through the design of the flow channel of the present invention, the high-pressure gas can be sprayed along the tangential direction of the end edge of the outer ring surface of the inner cup body 10, which greatly improves the quality of the painting operation.

It can be seen that, compared with the known problem that the rotary cup cannot effectively control the atomization wind and cause the poor quality of the coating operation, the utility model does propose an effective means to improve the problem, but the above is only The preferred embodiment of the utility model is only, and all equal design changes done according to the patent scope of the utility model should be covered by the technology of this case.

Claims (5)

1. An electrostatic atomizer revolve cup structure, can accept to drive and high speed rotary is characterized in that, this revolves cup and includes:

   Cup in one, has a ware portion, and this ware portion bottom has extended axially a coating ascending pipe with perfusion coating certainly, be a circular cone recess in this ware portion, and be connected with this coating ascending pipe with plural first tap hole, allow coating evenly flow in this circular cone recess, and the centrifugal force that is produced by high speed rotary make paint particlesization, this coating injection inner axial tube more is extended with a gas conduit for the injection gases at high pressure in addition, and is communicated to cup lateral border in this with plural second tap hole; And

   One outside housing cover, be provided with a sleeve joint hole in axial bottom to be socketed on this coating ascending pipe outer rim, and be formed with an air guide runner that extends to ora terminalis with cup outer rim in this, make and inject of the tangential direction ejection of the gases at high pressure of this air guide runner along this ware portion outer ring surface ora terminalis through this second tap hole.
2. Electrostatic atomizer as claimed in claim 1 revolve cup structure, it is characterized in that wherein this coating ascending pipe outer rim is formed with ladder retaining edge, to limit the degree of depth that this outside housing cover is socketed on the coating ascending pipe.
3. Electrostatic atomizer as claimed in claim 1 revolve cup structure, it is characterized in that wherein this coating ascending pipe end also has a junction surface, for a retainer ring makes up on it with this outside housing cover with should in cup combine closely.
4. Electrostatic atomizer as claimed in claim 3 revolve cup structure, it is characterized in that wherein this retainer ring and this junction surface are provided with the internal and external screw thread that can screw togather mutually.
5. Electrostatic atomizer as claimed in claim 1 revolve cup structure, it is characterized in that, wherein should in cup radially lock with this outside housing cover by at least one bolt.

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