A rotary atomizer cup head paint distribution plate

Abstract

The present application provides a rotary atomizer cup head paint distribution plate, the distribution plate is located in the middle of the inner side of the cup head, including a distribution plate body, a base and a connecting column; the base and the cup head are movably connected, the distribution plate body and the base are connected through the connecting column, the connecting column fixes the distribution plate body at a position set at a vertical height from the base, and a first gap is formed between the distribution plate body and the base; the surface of the distribution plate body is provided with a first protrusion extending through the first gap to the base, and the paint of the atomizer is transmitted in the first gap after passing through the base and the first protrusion; the cross-sectional shape of the connecting column corresponding to the first gap is set to an ellipse with one end wide and the other end narrow. The beneficial effects of the present application are: when the paint of the atomizer reaches the first protrusion in the first gap through the base, it is evenly distributed to both sides, so that the paint is distributed more evenly; when the paint transmitted in the first gap flows through the connecting column with a streamlined cross-section, the connecting column evenly cuts the paint liquid film.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrostatic spraying, and in particular to a rotary atomizer cup head paint distribution plate. Background Art

[0002] Centrifugal atomization generally consists of a paint supply system, a drive motor, a cup head, a forming air hood and other parts. The paint adjusted to a certain viscosity is transported to the center of the inner wall of the cup head by the paint supply system, and then distributed to the inner wall of the cup head by the distribution plate. The turbine motor can generate a speed of 30,000 to 70,000 revolutions. The cup head rotates at high speed driven by the motor. The paint transported to the inner wall of the cup head is accelerated along the inner wall of the cup head under the action of centrifugal force. The edge of the inner wall of the cup head is engraved with fine teeth. The paint accelerated by centrifugation is divided into uniform filaments by the fine teeth, and quickly breaks into small droplets not far from the cup head, thereby realizing the atomization of the paint. The higher the rotation speed of the cup head, the finer the atomized particles.

[0003] In the prior art, the design schemes of the distribution plate include integrated slit design, integrated column design, split column connection design, split cutting tooth design, etc. These designs have been found to have uneven distribution, jet, wave or finger-like flow after distribution during use. These phenomena not only make the paint unevenly distributed, resulting in a wide distribution and poor consistency of atomized particles, but also cause serious wear of the cup head in the long term. The wide distribution of atomized particles often leads to poor leveling and glossiness of the coating film, and sometimes even coating defects such as orange peel and paint spots. Summary of the invention

[0004] The purpose of the present application is to provide a rotary atomizer cup head paint distribution disk in view of the above problems.

[0005] In the first aspect, the present application provides a rotary atomizer cup head paint distribution plate, which is located in the middle of the inner side of the cup head, and includes a distribution plate body, a base, and a plurality of connecting columns connected between the distribution plate body and the base, and the plurality of connecting columns are circumferentially distributed between the distribution plate body and the base; the base and the cup head are movably connected, and the plurality of connecting columns fix the distribution plate body at a position set at a vertical height from the base, and a first gap is formed between the distribution plate body and the base; a first protrusion is provided on the surface of the distribution plate body, extending through the first gap to the base, and the paint of the atomizer is transmitted in the first gap after passing through the base and the first protrusion; the cross-sectional shape of the connecting column corresponding to the first gap is set to an ellipse that is wide at one end and narrow at the other end.

[0006] According to the technical solution provided in the embodiment of the present application, the distribution plate body includes a first surface and a second surface, the first surface is close to the base, and the first surface and the second surface form a closed disc structure; the first protrusion is arranged in the middle of the first surface, and the end of the first protrusion away from the first surface is arranged as a pointed cone-shaped liquid separation cone tip, the liquid separation cone tip extends to the inside of the base, and the paint is transferred to the liquid separation cone tip.

[0007] According to the technical solution provided in the embodiment of the present application, the second surface has a first groove recessed inwardly corresponding to the first protrusion, the first groove includes a groove bottom and a groove wall, the groove bottom is configured as a first conical surface structure recessed inwardly in the middle; a plurality of first through holes are provided between the first surface and the groove bottom, the plurality of first through holes are centripetally arranged in a manner inclined from the first surface toward the groove bottom, and the first through holes connect the first surface and the second surface.

[0008] According to the technical solution provided in the embodiment of the present application, the cross-sectional shape of the connecting column corresponding to the first gap is set to be an ellipse that is wide at one end close to the center of the distribution plate body and narrow at one end away from the center of the distribution plate body.

[0009] According to the technical solution provided in the embodiment of the present application, the side wall of the base is configured as a first inclined surface structure in an inverted cone shape relative to the distribution plate body.

[0010] According to the technical solution provided in the embodiment of the present application, the cone angle degree range of the first protrusion corresponding to the liquid separation cone tip is: 90 degrees-150 degrees.

[0011] According to the technical solution provided in the embodiment of the present application, the cone angle degree range of the first cone surface structure is: 100 degrees-170 degrees.

[0012] According to the technical solution provided in the embodiment of the present application, the degree range of the centripetal angle formed by the inclined arrangement of a plurality of the first through holes is: 10 degrees to 90 degrees.

[0013] According to the technical solution provided in the embodiment of the present application, the numerical range of the aperture of the first through hole is: 0.5mm-1.5mm.

[0014] According to the technical solution provided in the embodiment of the present application, the second surface is configured as a second inclined surface structure whose edge is inclined toward the edge of the first surface, and the inclination angle of the second inclined surface structure ranges from 5 degrees to 15 degrees.

[0015] Beneficial effects of the present invention: The present application provides a rotary atomizer cup head paint distribution plate, which is located in the middle of the inner side of the cup head, and includes a distribution plate body, a base, and a plurality of connecting columns connected between the distribution plate body and the base, wherein the plurality of connecting columns are circumferentially distributed between the distribution plate body and the base; the base and the cup head are movably connected, and the plurality of connecting columns fix the distribution plate body at a position set at a vertical height from the base, and a first gap is formed between the distribution plate body and the base; a first protrusion is provided on the surface of the distribution plate body, extending through the first gap to the base, and the paint of the atomizer is transmitted in the first gap after passing through the base and the first protrusion; the cross-sectional shape of the connecting column corresponding to the first gap is set to an ellipse that is wide at one end and narrow at the other end.

[0016] When the paint of the atomizer reaches the first protrusion in the first gap through the base, it is evenly distributed to both sides, so that the paint is distributed more evenly; when the paint transmitted in the first gap flows through the connecting column with a streamlined cross-section, the connecting column evenly cuts the paint liquid film.

[0017] According to the technical solution provided in the embodiment of the present application, the distribution plate body includes a first surface and a second surface, the first surface is close to the base, and the first surface and the second surface form a closed disc structure; the first protrusion is arranged in the middle of the first surface, and the end of the first protrusion away from the first surface is arranged as a pointed cone-shaped liquid separation cone tip, the liquid separation cone tip extends to the inside of the base, and the paint is transferred to the liquid separation cone tip.

[0018] The pointed conical liquid dispensing cone tip located in the middle of the dispensing plate body enables the paint to be cut and distributed more evenly when passing through. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of the first embodiment of the present application;

[0020] Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure when the distribution disc body is cut through the first gap;

[0021] Figure 3 This is a schematic diagram of the flow structure of the coating fluid when passing through the connecting column in the first embodiment of the present application;

[0022] The text labels in the figure are as follows: 100, distribution plate body; 110, first surface; 111, liquid separation cone tip; 120, second surface; 121, groove bottom; 122, groove wall; 130, first through hole; 200, base; 300, connecting column; 400, cup head. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present application is described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present application.

[0024] like Figure 1 The first embodiment of the present application is shown, in which the distribution plate is located in the middle of the inner side of the cup head 400. In this embodiment, the cup head 400 is wrapped around the periphery of the distribution plate.

[0025] The distribution plate body 100 includes a distribution plate body 100, a base 200, and a plurality of connection posts 300 connected between the distribution plate body 100 and the base 200. The plurality of connection posts 300 are circumferentially distributed between the distribution plate body 100 and the base 200. In this embodiment, three connection posts 300 are circumferentially surrounding the periphery of the center of the distribution plate body 100. In other embodiments, the number of connection posts 300 can be specifically set according to the requirements of cutting the coating liquid film, on the premise of providing a stable support for the distribution plate body 100.

[0026] The base 200 is movably connected to the cup head 400. In a preferred embodiment, a pair of slots are provided on both sides of the base 200 corresponding to the cup head 400, and a pair of retaining springs are provided on the cup head 400 corresponding to the slots. The cup head 400 is movably mounted on the base 200 through the retaining springs.

[0027] The three connecting posts 300 fix the distribution plate body 100 at a position at a set vertical height from the base 200, and a first gap is formed between the distribution plate body 100 and the base 200. In this embodiment, when the first gap is wider, that is, when the value of the set vertical height of the distribution plate body 100 from the base 200 is larger, the paint will reach the position of the smaller stroke of the inner wall of the cup head 400 under the action of centrifugal force, which may not meet the coating requirements; when the first gap is narrower, that is, when the value of the set vertical height of the distribution plate body 100 from the base 200 is smaller, the paint will flow back. Paint reflux means that under the action of the centrifugal force generated by high-speed rotation, the paint will return to the main shaft of the turbine motor along the distribution plate body 100 and the base 200, thereby causing irreparable damage to the motor. Therefore, when using it, it is necessary to accurately adjust the size of the first gap.

[0028] In this embodiment, a first protrusion is disposed on the surface of the distribution plate body 100 and extends through the first slit to the base 200 . The paint of the atomizer is transferred into the first slit after passing through the base 200 and the first protrusion.

[0029] In a preferred embodiment, the side wall of the base 200 is configured as a first inclined surface structure in an inverted cone shape relative to the distribution plate body 100. In this preferred embodiment, the first inclined surface structure is arranged at a position of the base 200 corresponding to the inner wall of the cup head 400. The design purpose of this preferred embodiment is: in some special cases, such as the atomizer is placed horizontally, the paint microvalve leaks, the paint flow rate is too large, the rotation speed of the cup head 400 is too low, etc., after the paint is shot to the liquid separation cone tip 111, a part of the splashed paint will stick to the side wall of the base 200, preventing the paint from crawling along the side wall toward the turbine motor. In this preferred embodiment, the side wall of the base 200 is configured as an inverted cone-shaped inclined structure relative to the distribution plate body 100. When the paint splashes on the side wall, under the action of centrifugal force, the paint will be thrown off to the inner wall of the cup head 400 again, so as not to cause internal contamination of the atomizer. In this preferred embodiment, the angle formed by a pair of first inclined surface structures is 40 degrees. Figure 1 The angle indicated by the A part is the angle formed by a pair of first inclined surface structures. In the preferred embodiment, the degree of the angle can also be 30 degrees, 90 degrees or any value within the range of 30 degrees to 90 degrees.

[0030] In a preferred embodiment, the distribution plate body 100 includes a first surface 110 and a second surface 120, the first surface 110 is close to the base 200, and the first surface 110 and the second surface 120 form a closed disc structure; the first protrusion is arranged in the middle of the first surface 110, and the end of the first protrusion away from the first surface 110 is arranged as a pointed cone-shaped liquid separation cone tip 111, and the liquid separation cone tip 111 extends to the inside of the base 200, and the paint is transferred to the liquid separation cone tip 111.

[0031] In this preferred embodiment, the tip of the first protrusion is set to a pointed cone shape in order to facilitate evenly distributing the paint at the separator cone tip 111, so that the paint flows to both sides of the separator cone tip 111 through the separator cone tip 111, thereby distributing the paint more evenly. After the paint is injected into the distribution plate body 100 through the nozzle, it is evenly distributed to the first surface 110 by the separator cone tip 111, and then quickly thrown away from the first surface 110 under the action of centrifugal force to reach the inner wall of the cup head 400.

[0032] In this preferred embodiment, the cone angle of the first protrusion corresponding to the liquid separation cone tip 111 is 120 degrees. Figure 1The angle indicated by the C part is the angle of the cone angle of the liquid separation cone tip 111. In other preferred embodiments, the degree of the liquid separation cone tip 111 can also be 90 degrees, 150 degrees, or any value within the range of 90 degrees to 150 degrees. In this preferred embodiment, the cone angle of the liquid separation cone angle needs to be accurately set. When the cone angle value is large, the paint is easy to rebound to the side wall of the base 200, thereby causing reverse contamination; when the cone angle value is small, the liquid separation effect of evenly distributing the paint will be poor.

[0033] In this embodiment, the cross-sectional shape of the connecting column 300 corresponding to the first gap is set to be an ellipse with one end being wider and the other end being narrower.

[0034] In a preferred embodiment, the cross-sectional shape of the connecting column 300 corresponding to the first gap is set to be an ellipse with a wider end close to the center of the distribution plate body 100 and a narrower end away from the center of the distribution plate body 100. Figure 2 As shown, the cross section in the first gap is designed to be a streamlined (oval) structure, and the long axis in the cross section is distributed along the radial direction of the distribution plate body 100. The end of the cross section of the connecting column 300 close to the center of the distribution plate body 100 is called the wide end, and the other end of the cross section is called the narrow end. Figure 3 As shown, since the coating flows from the center to the surroundings, the coating first passes through the wide end of the cross section of the connecting column 300 and then passes through the narrow end. According to the Coanda effect of the fluid, the fluid is divided into two pieces, the upper and lower pieces, at the connecting column 300. When the two pieces of fluid flow from the wide end to the narrow end, the negative pressure is small and no vortex circulation is formed. Therefore, the connecting column 300 designed in this embodiment will not produce a cutting effect on the coating liquid film, and the liquid film will maintain its original uniformity and continuity when passing through the connecting column 300.

[0035] In a preferred embodiment, the second surface 120 is recessed inwardly with a first groove corresponding to the first protrusion, and the first groove includes a groove bottom 121 and a groove wall 122, and the groove bottom 121 is configured as a first conical surface structure with a middle portion recessed inwardly; a plurality of first through holes 130 are provided between the first surface 110 and the groove bottom 121, and the plurality of first through holes 130 are centripetally arranged in a manner inclined from the first surface 110 to the groove bottom 121, and the first through holes 130 connect the first surface 110 and the second surface 120.

[0036] In this preferred embodiment, the paint is injected into the second surface 120 through the first through hole 130 in the first gap, and is thrown off from the edge of the second surface 120 and falls onto the inner wall of the cup head 400 .

[0037] In this preferred embodiment, four first through holes 130 are provided. In other preferred embodiments, the number of the first through holes 130 may be 3, 6 or any value within the range of 3-6.

[0038] In this preferred embodiment, the cone angle of the first cone structure is 120 degrees. Figure 1 The angle indicated by the D part is the cone angle of the first cone surface structure. In other preferred embodiments, the cone angle of the first cone surface structure can also be 100 degrees, 170 degrees, or any value in the range of 100 degrees to 170 degrees. In this preferred embodiment, the purpose of providing the first groove is to enable the paint entering through the first through hole 130 to be more evenly distributed on the second surface 120.

[0039] Preferably, in order to increase the stroke of the coating on the second surface 120 acting on the inner wall of the cup head 400, the second surface 120 is configured as a second inclined surface structure whose edge is inclined toward the edge of the first surface 110. In this preferred embodiment, the inclination angle of the second inclined surface structure is 10 degrees. Figure 1 The angle indicated by the E part is the inclination angle of the second inclined surface structure. In other preferred embodiments, the inclination angle can also be 5 degrees, 15 degrees or any value within the range of 5 degrees to 15 degrees.

[0040] In this preferred embodiment, the aperture value of the first through hole 130 is 1.0 mm. In other preferred embodiments, the aperture value of the first through hole 130 can also be 0.5 mm, 1.5 mm, or any value within the range of 0.5 mm-1.5 mm. The specific aperture size is specifically set according to the rated discharge volume and rated speed designed for the cup head 400.

[0041] In this preferred embodiment, the degree of the centripetal angle formed by the inclined arrangement of the plurality of first through holes 130 is 50 degrees. Figure 1 The angle indicated by the B part is the angle of the centripetal angle. In other preferred embodiments, the centripetal angle can also be 10 degrees, 90 degrees, or any value within the range of 10 degrees to 90 degrees. The cup head 400 with a large discharge volume needs to set the centripetal angle to a larger degree, and the cup head 400 with a small discharge volume needs to set the centripetal angle to a smaller degree.

[0042] This preferred embodiment is designed to more conveniently clean the distribution tray body 100 to avoid paint accumulation causing coating defects and damaging the dynamic balance of the cup head 400. Therefore, the self-cleaning effect of the distribution tray body 100 can be achieved in this preferred embodiment.

[0043] Preferably, in order to prevent the sharp edge of the groove wall 122 of the first groove from causing turbulence of the paint, the top edge of the first groove along the groove wall 122 is designed to be a rounded structure.

[0044] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the methods and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concepts and technical solutions of the application to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A rotary atomizer cup head paint distribution plate, the distribution plate is located in the middle of the inner side of the cup head (400), characterized in that: The invention comprises a distribution plate body (100), a base (200), and a plurality of connecting columns (300) connected between the distribution plate body (100) and the base (200), wherein the plurality of connecting columns (300) are circumferentially distributed between the distribution plate body (100) and the base (200); the base (200) and the cup head (400) are movably connected, and the plurality of connecting columns (300) fix the distribution plate body (100) at a position at a set vertical height from the base (200), so that a first gap is formed between the distribution plate body (100) and the base (200); A first protrusion is provided on the surface of the distribution plate body (100) and extends through the first slit to the base (200); the paint of the atomizer passes through the base (200) and the first protrusion and is then transferred into the first slit; The cross-sectional shape of the connecting column (300) corresponding to the first gap is set to be an ellipse with one end being wider and the other end being narrower; The coating first passes through the wide end of the cross section of the connecting column (300) and then passes through the narrow end. According to the Coanda effect of the fluid, the fluid is divided into two pieces, an upper piece and a lower piece, at the connecting column (300). When the two pieces of fluid flow from the wide end to the narrow end, the negative pressure is small and no vortex circulation is formed. The connecting column (300) does not produce a cutting effect on the coating liquid film, and the liquid film maintains its original uniformity and continuity when passing through the connecting column (300). The distribution plate body (100) comprises a first surface (110) and a second surface (120), the first surface (110) is close to the base (200), and the first surface (110) and the second surface (120) form a closed disc-shaped structure; The first protrusion is arranged in the middle of the first surface (110); the end of the first protrusion away from the first surface (110) is arranged as a pointed cone-shaped liquid separation cone tip (111); the liquid separation cone tip (111) extends into the interior of the base (200); the coating is transferred to the liquid separation cone tip (111); the cone angle of the first protrusion corresponding to the liquid separation cone tip (111) ranges from 90 degrees to 150 degrees; The inner wall of the base (200) is configured as a first inclined surface structure in an inverted cone relative to the distribution plate body (100). When paint splashes onto the side wall, the paint will be thrown onto the inner wall of the cup head (400) again under the action of centrifugal force, so as to avoid causing internal contamination of the atomizer.

2. The rotary atomizer cup head paint distribution plate according to claim 1, characterized in that: The second surface (120) is recessed inwardly to form a first groove corresponding to the first protrusion, the first groove comprising a groove bottom (121) and a groove wall (122), the groove bottom (121) being configured as a first conical surface structure with a middle portion recessed inwardly; A plurality of first through holes (130) are provided between the first surface (110) and the groove bottom (121); the plurality of first through holes (130) are arranged centripetally in a manner inclined from the first surface (110) toward the groove bottom (121); and the first through holes (130) connect the first surface (110) and the second surface (120).

3. The rotary atomizer cup head paint distribution plate according to claim 1, characterized in that: The cross-sectional shape of the connecting column (300) corresponding to the first gap is set to be an ellipse with a wider end close to the center of the distribution plate body (100) and a narrower end away from the center of the distribution plate body (100).

4. The rotary atomizer cup head paint distribution plate according to claim 2, characterized in that: The cone angle of the first cone surface structure ranges from 100 degrees to 170 degrees.

5. The rotary atomizer cup head paint distribution plate according to claim 2, characterized in that: The degree range of the centripetal angle formed by the inclined arrangement of a plurality of the first through holes (130) is 10 degrees to 90 degrees.

6. The rotary atomizer cup head paint distribution plate according to claim 2, characterized in that: The numerical range of the aperture of the first through hole (130) is: 0.5 mm-1.5 mm.

7. The rotary atomizer cup head paint distribution plate according to claim 1, characterized in that: The second surface (120) is configured as a second inclined surface structure whose edge is inclined toward the edge of the first surface (110), and the inclination angle of the second inclined surface structure ranges from 5 degrees to 15 degrees.

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