Wear-resistant distribution post

Abstract

To provide a wear-resistant mounting post for a distributor cap in a rotary bell cup atomizer.SOLUTION: The mounting post includes a flange separating a thin barbed end from a larger diameter central portion. The flange fits into a countersunk depression in the distributor cap to provide a flange surface which is flush with the distributor cap surface. Paint flowing radially outward across the distributor cap follows the flange surface to the central portion of the post. This design prevents the paint from undercutting the distributor cap surface, and ensures that any wear of the post is limited to the larger diameter central portion.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the benefit of the priority date of U.S. Provisional Application No. 63 / 137279, titled "WEAR RESISTANT DISTRIBUTOR POST", filed on January 14, 2021.

[0002] This disclosure relates to the field of robotic spray coating devices, more specifically, to an attachment post for a distributor cap used in a rotary bell cup spray coating device. The attachment post has a flange with a dish hole into the distributor cap and prevents high - speed paint from undercutting the attachment post and flowing into the distributor cap.

Background Art

[0003] It is well - known to use industrial robots for spray coating applications. Many coating and painting devices developed for robotic spray coating are well - known. These include devices that supply paint or other fluid coating materials through a base unit towards a spray bell cup. The bell cup is an assembly attached to a hollow shaft and rotates in front of the base. The bell cup typically rotates at a high speed exceeding 30,000 RPM. During the painting operation, the coating material travels through the hollow shaft towards the bell cup assembly. The coating liquid contacts a distributor cap or a distribution plate disposed in the bell cup, and the distributor cap or distribution plate disperses the fluid by centrifugal force along the inner surface of the rotating bell cup. The coating liquid exits from the annular region between the distributor cap and the inner surface of the bell cup, flows along the edge of the bell cup, and then moves away from the bell cup towards the workpiece to be painted.

[0004] In the type of bell cup coating apparatus described above, it is known that the distribution cap is mounted inside the base of the bell cup via mounting posts. One known design uses three such mounting posts. The mounting posts are attached to the internal base of the bell cup by threads or the like. The distribution cap is then attached to the mounting posts by pushing the return end of the post into the hole in the distribution cap, or the like. This arrangement allows the distribution cap to be easily assembled inside the bell cup and defines the standoff distance of the distribution cap from the bell cup. The central portion of the mounting post, located between the threaded end of the bell cup and the return end of the distribution cap, typically has a larger diameter than those ends. The purpose of this is to ensure the aforementioned standoff distance and to cause high-speed paint to collide with the central portion of the mounting post as the paint flows radially outward. A larger diameter is advantageous because high-speed paint can cause wear on the mounting post. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] However, under certain circumstances, paint can wear down the surface of the distribution cap, causing undercuts, which can lead to high-speed paint hitting the post return portion. This results in wear on the small-diameter return portion of the post, which is undesirable. While other distribution cap mounting configurations are known, none allow for the distribution cap to be easily and conveniently assembled within the bell cup of a mounting post with a return.

[0006] In light of the above situation, an improved distribution cap mounting post is desired that prevents paint from colliding with and causing wear on the smaller diameter portion of the post. [Means for solving the problem]

[0007] A wear-resistant mounting post for a distribution cap of a rotary bell cup sprayer is described and illustrated in accordance with the teachings of this disclosure. The mounting post includes a flange that separates a thin return end from a larger diameter central portion. The flange fits into a countersunk hole in the distribution cap and provides a flange surface that is flush with the surface of the distribution cap. Paint flowing radially outward across the distribution cap continues along the flange surface to the central portion of the post. This configuration prevents paint from undercutting the surface of the distribution cap and ensures that wear on the post is limited to the larger diameter portion.

[0008] Additional features of the disclosed apparatus and method will become apparent from the following description and claims, in conjunction with the accompanying drawings. [Brief explanation of the drawing]

[0009] [Figure 1] This is a cross-sectional view of a rotary bell cup spray coating apparatus of a type well known in the art and used in painting robots.

[0010] [Figure 2] Figure 1 is a cross-sectional view of the rotating bell cup, showing how high-speed paint spreads radially across the surface of the distribution cap and collides with the mounting post.

[0011] [Figure 3] Figures 1 and 2 show images of the types of distribution caps, and as shown in Figure 2, they illustrate the wear pattern of the distribution cap caused by high-speed paint flow.

[0012] [Figure 4] This is a cross-sectional view of a rotary bell cup having a distribution cap and a mounting post according to an embodiment of the present disclosure, the mounting post having a flange configured to prevent wear of the surface of the distribution cap due to high-speed paint flow.

[0013] [Figure 5]This is a cross-sectional view of the distribution cap and mounting post shown in Figure 4, according to an embodiment of the present disclosure.

[0014] [Figure 6] Figures 4 and 5 are isometric views of the mounting post shown in the embodiment of the present disclosure, in which the mounting post flange directs the flow of high-speed paint in a desired direction.

[0015] [Figure 7] Figure 6 is a side view of the mounting post according to an embodiment of the present disclosure, showing details of the flange and other features of the mounting post.

[0016] [Figure 8] This is a side view of a second configuration of a distribution cap mounting post according to another embodiment of the present disclosure, the mounting post having a flange for preventing wear of the distribution cap and the post. [Modes for carrying out the invention]

[0017] The following description of embodiments of this disclosure relating to wear-resistant mounting posts for distribution caps is essentially illustrative and is not intended to limit the disclosed apparatus and technology, or their applications or use.

[0018] It is well known that industrial robots are used in spray painting workpieces such as automobile bodies. Painting robots can use various types of spray painting equipment to deliver a controlled flow of paint or other coating liquid onto the workpiece in a consistent and well-dispersed spray pattern. These devices include, among others, air-propelled sprayers and rotary bell cup sprayers.

[0019] FIG. 1 is a cross-sectional view of a rotary bell cup spray coating apparatus 100 of the type used in paint robots, which is well known in the art. The bell cup 110 is rotatably attached to a spray atomizer device, and the atomizer device is then attached to the outer arm or wrist of the robot. During the spray coating operation, the bell cup 110 rotates at a high speed (typically tens of thousands of RPM) and distributes paint or other coating fluid (hereinafter simply referred to as paint) in a clearly defined spray pattern. The paint is introduced into the bell cup 110 through a central opening 120. The paint moves as shown by arrow 122 until it reaches a distribution cap 130 that is fixedly attached at a position away from the bell cup 110 by a plurality of mounting posts 140, as will be described later. The distribution cap 130 blocks the axial flow of the paint and causes the paint to spread radially along the front surface 132 of the distribution cap 130 as shown by arrow 124. The distribution cap 130 is typically composed of a plastic material such as acetal. An insert 134 composed of a high-strength material such as titanium is provided to block the axial flow of the paint without being worn by the paint. In some applications, a portion of the paint intentionally penetrates the insert 134 and flows out of the rear surface 136 of the distribution cap 130.

[0020] Due to the high rotational speed of the bell cup device 100, all the paint is flung radially outward from the front surface 132 and the rear surface 136 of the distribution cap 130. The paint reaches the inner surface 112 from the distribution cap 130. Due to the rotation of the bell cup 110, the paint flows along the inner surface 112 as shown by arrow 150 and is discharged from the bell cup 110. The paint is discharged from the entire circumference of the bell cup 110 as a pattern of finely atomized droplets and deposits on the workpiece. As is well known in the art, an electrostatic charge can be applied to improve the deposition of the paint droplets on the workpiece.

[0021] Figure 2 is a cross-sectional view of the rotary bell cup 110 of FIG. 1, showing how the high-speed paint spreads radially over the surface of the dispensing cap and impinges on the mounting posts. In addition to the bell cup 110 (trimmed in FIG. 2), a dispensing cap 130 having a front face 132 and an insert 134 are shown in FIG. 2 as in FIG. 1. Two of the plurality of mounting posts 140 are also shown in FIG. 2. The left mounting post 140 is shown in cross-section as it is disposed in the cross-section of FIG. 2. The right mounting post 140 is only partially visible as both of its ends are blocked by the bell cup 110 and the dispensing cap 130 in FIG. 2. Three of the plurality of mounting posts 140 are used to attach the dispensing cap 130 to the bell cup 110, but the third mounting post 140 is not visible in the cross-sectional view of FIG. 2.

[0022] One known configuration of the mounting post 140 has a first end 142, a second end 144, and a central portion 146. The first end 142 is attached to the inner base of the bell cup 110 by threads or the like. The second end 144 has a return shape and is press-fitted into a hole in the dispensing cap 130. This configuration allows the dispensing cap 130 to be directly assembled to the bell cup 110, and the larger diameter central portion 146 provides a defined standoff spacing of the dispensing cap 130 from the bell cup 110.

[0023] As described above, the paint from the robot flows into the bell cup 110 along arrow 122, impinges on the insert 144, and flows radially outward across the front face 132 of the dispensing cap 130 as shown by arrow 124 (shown on the right side of FIG. 1). Most of the paint flowing radially outward across the front face 132 does not encounter an obstacle on its way towards the periphery of the dispensing cap 130 and is flung outwardly onto the inner surface 112 of the bell cup 110. However, a very small portion of the paint encounters one of the mounting posts 140 as it flows outward across the front face 132.

[0024] The paint following arrow 124 is forced to flow around the central portion 146 when it encounters the mounting post 140. In addition to the paint spreading circumferentially around the central portion 146, high-speed splashes deflect some of the paint axially as indicated by arrows 126 and 128. The paint following arrow 126 quickly passes around the central portion 146 and exits the bell cup 110. The paint following arrow 128 has axial energy, which is first deflected by the front surface 132 of the distribution cap 130. Depending on the paint flow rate, the rotation speed of the bell cup 110, the type of paint (e.g., metal flakes), and other factors, over time the front surface 132 of the distribution cap 130 closest to the mounting post 140 may be worn by the paint. This wear weakens the central portion 146 of the mounting post 140, eventually causing high-speed paint to collide with the second end 144 and contact the central portion 146. Next, the high-speed paint flow may cause wear on the second end 144 of the mounting post 140, which is undesirable.

[0025] Figure 3 is an image of a distribution cap 300 of the type shown in Figures 1 and 2, showing the wear pattern caused by the high-speed paint flow as shown in Figure 2. The insert 310 is shown in the center of the distribution cap 300 as described above. The distribution cap 300 was mounted on the bell cup and the assembly was rotated in the direction R indicated by arrow 320. The high-speed rotation caused the paint to flow radially outward along the front surface of the distribution cap 300, as indicated by arrow 330, and also created a tangential component of the velocity (relative to the distribution cap 300), as indicated by arrow 332.

[0026] Figure 3 shows a portion of the three mounting posts 340. The arrangement of the mounting posts 340 when attaching the distribution cap 300 to the bell cup is described above. An undercut region 350 is visible near each of the mounting posts 340. The undercut region 350 is a crescent-shaped area on the front surface of the distribution cap 300 that has been worn away by the high-speed paint, particularly the tangential component of the paint flow indicated by arrow 332. It can be seen that the region 350 is concentrated around the side of the mounting post 340 where the tangential flow of paint collides. In the test specimen shown in the image of Figure 3, the undercut region 350 developed to the point where the high-speed paint reached the small-diameter return end of the mounting post 340. Thereafter, the paint was almost completely cut off by the small-diameter return end of the mounting post 340.

[0027] This disclosure describes a novel distribution cap mounting post configured to prevent high-speed paint flows from penetrating the surface of the distribution cap and colliding with the small-diameter portion of the post, as shown in Figure 3. This is described in detail below.

[0028] Figure 4 is a cross-sectional view of a rotary bell cup with a distribution cap and mounting post according to this embodiment, the mounting post having a flange configured to prevent wear on the surface of the distribution cap due to high-speed paint flow. The bell cup 410 is equivalent to the bell cup 110 in Figures 1 and 2 described above. The distribution cap 430 is mounted inside the bell cup 410. Paint from the robot flows into the bell cup sprayer assembly as indicated by arrow 422 and strikes the insert 434 of the distribution cap 430 in the same manner as described above.

[0029] Multiple mounting posts 440 are used to securely attach the distribution cap 430 to a predetermined position within the bell cup 410. Figure 4 shows two of the multiple mounting posts 440; the left mounting post 440 is shown in cross-section because it is located in the cross-section of Figure 4, while the right mounting post 440 is only partially visible because its two ends are obscured by the bell cup 410 and distribution cap 430 in Figure 4. In this exemplary embodiment, three mounting posts 440 are used to attach the distribution cap 430 to the bell cup 410, and the third mounting post 440 is not visible in Figure 4.

[0030] Each mounting post 440 has a first end 442, a second end 444, and a central portion 446. The first end 442 is attached to the internal base of the bell cup 410 by threads or the like. The second end 444 has a return shape and is press-fitted into the hole of the distribution cap 430. The larger diameter central portion 446 provides a defined standoff distance for the distribution cap 430 from the bell cup 410. The mounting post 440 also has a disc-shaped flange 450 at the joint between the second end 444 and the central portion 446, as shown in the figure. The flange 450 fits into a corresponding countersunk recess of the distribution cap 430, and the exposed surface 452 of the flange 450 is coplanar with the front surface 432 of the distribution cap 430. Because the flange 450 is coplanar with or directly below the front surface 432, the flange 450 does not alter the direction of paint flow or collide with the paint.

[0031] The flange 450 is configured to control the flow of high-speed paint so that the paint does not undercut the mounting posts into the distribution cap 430. Instead, the high-speed paint flows along the exposed surface 452 and collides with the mounting posts 440 (radially and tangentially as described above) at the base of the central section 446, thereby causing the paint to follow the path indicated by arrow 424. The paint then flows rapidly around the central section 446 and splashes toward the bell cup 410, as indicated by arrow 426.

[0032] The flange 450 prevents paint hitting the mounting post 440 from being redirected (by splash effect) into the resin distribution cap 430, as in the current configuration shown in Figure 2. Rather, all the splash energy of the paint hitting the mounting post 440 is absorbed by the mounting post 440 itself, and the mounting post 440 is a metal part (titanium, stainless steel, or other suitable metal) and is far more wear-resistant than the resin distribution cap 430. Furthermore, the fillet 454 (Figure 5) at the joint between the central portion 446 and the flange 450 assists in redirecting the paint flow, as indicated by arrow 424, until the paint flows around the central portion 446, as indicated by arrow 426.

[0033] Figure 5 is a cross-sectional view of the distribution cap 430 and mounting post 440 of Figure 4 according to one embodiment of the present disclosure. Figure 5 is simply a diagram showing these components without the surrounding elements and flow arrows of Figure 4. The mounting post 440 with flange 450 is shown in Figure 5 as described above. The flange 450 fits into the corresponding countersunk recess of the distribution cap 430, and the exposed surface 452 of the flange 450 is at the same height as the front surface 432 of the distribution cap 430, as shown. A fillet 454 is also shown in Figure 5. The intersection can be set so that the exposed surface 452 is slightly “below” the front surface 432 (set in the countersunk recess), thereby preventing paint from colliding with the outer edge of the flange 450.

[0034] Figure 6 is an isometric view of the mounting post 440 shown in Figures 4 and 5, according to one embodiment of the present disclosure, the mounting post 440 having a mounting post flange 450 that directs the flow of high-speed paint in a desired direction. Figure 7 is a side view of the mounting post 440 according to one embodiment of the present disclosure, showing details of the flange 450 and other characteristic structures.

[0035] The first end 442, second end 444, and central portion 446 described above are shown in Figures 6 and 7. An undercut 448 can be provided at the base of the first end 442 to avoid stress concentration and to actively seat the central portion 446 against the bell cup 410. The flange 450, also shown in Figures 6 and 7, has an exposed surface 452 and a fillet 454 as shown in Figure 7. Furthermore, a chamfer 456 may be provided on the periphery of the flange 450 opposite the exposed surface 452 to facilitate seating of the flange 450 into the countersunk hole of the distribution cap 430.

[0036] In one embodiment, the mounting post 440 has the following features and dimensions: The first end 442 is threaded to have a male thread with a diameter of approximately 1.5 mm. The second end 444 is cylindrical with a barb and a diameter of approximately 1.0 mm. The central portion 446 is cylindrical and has a diameter of approximately 2.5-3.0 mm. The flange 450 is disc-shaped with a thickness of less than 1 mm and an outer diameter of approximately 5 mm. The mounting post 440 is preferably constructed as a single piece of a high-strength, corrosion-resistant material such as titanium or stainless steel. The specifications listed in this paragraph are for illustrative purposes only. Dimensions may be larger or smaller depending on the application and the dimensions of the bell cup and distribution cap.

[0037] Figure 8 is a side view of a second structure of a distribution cap mounting post 840 according to another embodiment of the present disclosure, the mounting post 840 having a flange 850 for preventing wear of the distribution cap and the post. The mounting post 840 is substantially the same as the mounting post 440 described above, except that the first end 842 has a barb instead of threads. The barb structure of the first end 842 allows the mounting post 840 to be used in applications where press-fitting of the bell cup into the base is employed without threads. For example, a hollow cylindrical resin insert can be placed in a cylindrical hole in the base of the bell cup, and then the first end 842 of the mounting post 840 can be press-fitted into the resin insert.

[0038] The mounting post 840 has a second end 844 and a central portion 846, which are the same as the equivalent structure in the mounting post 440 in Figure 4-7. Similarly, the flange 850 of the mounting post 840 has the same exposed surface 854 and fillet 854 as the equivalent structure in the mounting post 440, and the flange 850 allows the high-speed paint to flow around the central portion 846 of the mounting post 840 in the desired manner without undercutting the mounting post within the distribution cap.

[0039] As outlined above, the disclosed embodiment of the distribution cap mounting post offers significant advantages over existing mounting post structures. Specifically, the mounting post flange with countersunk holes formed in the recesses of the distribution cap surface can improve the hydrodynamics of the paint flow around the mounting post and solve the problem of distribution cap wear that can lead to wear of the return end in existing mounting post structures.

[0040] While several exemplary embodiments and designs of wear-resistant mounting posts for rotating bell cup dispensing caps have been described, those skilled in the art will recognize their modifications, rearrangements, additions, and subcombinations. Accordingly, the appended claims and assertions should be construed to include all such modifications, rearrangements, additions, and subcombinations that are in their true spirit and scope. [Configuration 1] A mounting post for attaching a distribution cap to a rotating bell cup in a spray painting system, The first end is configured to be fixedly embedded inside the base portion of the rotating bell cup, A second end opposite to the first end, which is configured to be fixedly embedded within the distribution cap, A cylindrical central portion is positioned between the first end and the second end, and has a larger diameter than the first end and the second end. A disc-shaped flange, which is positioned between the second end and the central portion and has a larger diameter than the central portion, A mounting post having a mounting post. [Configuration 2] The mounting post according to configuration 1, having a fillet at the joint between the central portion and the flange. [Configuration 3] The mounting post according to configuration 1, wherein the second end has a return shape configured to be inserted into the hole of the distribution cap. [Structure 4] The mounting post according to configuration 1, wherein the second end is embedded in the distribution cap, and the exposed surface of the flange is at the same height as the front surface of the distribution cap or slightly recessed downward. [Composition 5] The mounting post according to configuration 1, wherein the first end has a male thread configured to be inserted into a female threaded hole in the base portion of the rotating bell cup. [Composition 6] The mounting post according to configuration 1, wherein the first end has a return shape configured to be press-fitted into a resin insert located in a hole in the base portion of the rotating bell cup. [Composition 7] The mounting post according to configuration 1, wherein the mounting post is made of a single piece of titanium or stainless steel. [Structure 8] A distribution cap assembly used in the bell cup of a rotary sprayer for spray painting, Multiple mounting posts, Equipped with a distribution cap, Each of the mounting posts has a first end configured to be fixedly embedded inside the base portion of the bell cup, a second end having a return shape on the opposite side of the first end, a cylindrical central portion positioned between the first end and the second end and having a larger diameter than the first end and the second end, and a disc-shaped flange positioned between the second end and the central portion and having a larger diameter than the central portion. The distribution cap has pre-formed holes for receiving the second ends of each of the mounting posts, thereby fixing the distribution cap in the internal position of the bell cup and diverting the paint liquid radially outward, and the distribution cap further has countersunk recesses around the pre-formed holes, the recesses having dimensions and shapes for receiving the flange. Distribution cap assembly. [Composition 9] The distribution cap assembly according to configuration 8, wherein the distribution cap is mounted on the mounting post, and the exposed surface of each flange of the mounting post is at the same height as or slightly recessed below the front surface of the distribution cap. [Configuration 10] The distribution cap assembly according to configuration 8, wherein each of the mounting posts has a fillet at the joint between the central portion and the flange. [Composition 11] The aforementioned plurality of mounting posts are three mounting posts, as described in configuration 8 of the distribution cap assembly. [Composition 12] The distribution cap assembly according to configuration 8, wherein each of the mounting posts is made of a single piece of titanium or stainless steel, and the distribution cap is made of a resin material. [Composition 13] The distribution cap assembly according to configuration 8, wherein the distribution cap has a metal insert in its center, and the flow of the paint liquid collides with the insert and diffuses radially outward on the front surface of the distribution cap. [Composition 14] Each of the first ends of the mounting post has a male thread configured to be inserted into the female threaded hole of the base portion of the bell cup, or The distribution cap assembly according to configuration 8, wherein the first end has a return shape configured to be press-fitted into a resin insert located in a hole in the base portion of the bell cup. [Composition 15] A rotary sprayer used in spray painting robots, A bell cup mounted on the outer arm or wrist of the robot, which is rotatable around a central axis, Multiple mounting posts, Equipped with a distribution cap, Each of the mounting posts has a first end configured to be fixedly embedded inside the base portion of the bell cup, a second end having a return shape on the opposite side of the first end, a cylindrical central portion positioned between the first end and the second end and having a larger diameter than the first end and the second end, and a disc-shaped flange positioned between the second end and the central portion and having a larger diameter than the central portion. The distribution cap has a plurality of pre-formed holes, one of which receives the second end of each of the mounting posts, thereby fixing the distribution cap in the internal position of the bell cup and diverting the paint liquid radially outward; the distribution cap further has countersunk recesses around each of the plurality of pre-formed holes, the recesses having dimensions and shape for receiving the flange. Rotary sprayer. [Composition 16] The rotary sprayer according to configuration 15, wherein when the distribution cap is installed on the mounting post, the exposed surface of each flange of the mounting post is at the same height as the front surface of the distribution cap or is slightly recessed downward. [Composition 17] The rotary sprayer according to configuration 15, wherein each of the mounting posts has a fillet at the joint between the central portion and the flange. [Composition 18] The rotary sprayer according to configuration 15, wherein each of the mounting posts is made of a single piece of titanium or stainless steel, and the distribution cap is made of a resin material. [Composition 19] The rotary sprayer according to configuration 15, wherein the distribution cap has a metal insert in its center, the flow of the paint liquid collides with the insert, and at least a portion of the flow diffuses radially outward on the front surface of the distribution cap. [Configuration 20] Each of the first ends of the mounting post has a male thread configured to be inserted into the female threaded hole of the base portion of the bell cup, or The rotary sprayer according to configuration 15, wherein the first end has a return shape configured to be press-fitted into a resin insert located in the hole of the base portion of the bell cup.

Claims

1. A distribution cap assembly used in a rotary bell cup of a rotary sprayer for spray painting, Distribution cap and A spray painting system comprises a mounting post for attaching the distribution cap to the rotating bell cup, wherein the mounting post is A first end portion is configured to be fixedly embedded inside the base portion of the rotating bell cup, A second end opposite to the first end, which is configured to be fixedly embedded within the distribution cap, A cylindrical central portion is positioned between the first end and the second end, and has a larger diameter than the first end and the second end. A disc-shaped flange, which is positioned between the second end and the central portion and has a larger diameter than the central portion, It has, A distributor cap assembly in which the second end is embedded within the distributor cap, and the exposed surface of the flange is at the same height as the front surface of the distributor cap, or is recessed in a direction toward the opposite surface from the front surface of the distributor cap so that paint liquid flowing over the front surface of the distributor cap does not collide with the outer edge of the flange.

2. The distribution cap assembly according to claim 1, wherein the joint between the central portion and the flange has a fillet.

3. The distribution cap assembly according to claim 1, wherein the second end has a return shape configured to be inserted into the hole of the distribution cap.

4. The distribution cap assembly according to claim 1, wherein the first end has a male thread configured to be inserted into a female threaded hole in the base portion of the rotary bell cup.

5. The distribution cap assembly according to claim 1, wherein the mounting post is made of a single piece of titanium or stainless steel.

6. A mounting post for attaching a distribution cap to a rotating bell cup in a spray painting system, A first end portion is configured to be fixedly embedded inside the base portion of the rotating bell cup, A second end opposite to the first end, which is configured to be fixedly embedded within the distribution cap, A cylindrical central portion is positioned between the first end and the second end, and has a larger diameter than the first end and the second end. A disc-shaped flange, which is positioned between the second end and the central portion and has a larger diameter than the central portion, It has, The first end is a mounting post having a return shape configured to be press-fitted into a resin insert located in a hole in the base portion of the rotating bell cup.

7. A distribution cap assembly used in the bell cup of a rotary sprayer for spray painting, Multiple mounting posts, Equipped with a distribution cap, Each of the mounting posts has a first end configured to be fixedly embedded inside the base portion of the bell cup, a second end having a return shape on the opposite side of the first end, a cylindrical central portion positioned between the first end and the second end and having a larger diameter than the first end and the second end, and a disc-shaped flange positioned between the second end and the central portion and having a larger diameter than the central portion. The distribution cap has pre-formed holes for receiving the second ends of each of the mounting posts, thereby fixing the distribution cap in the internal position of the bell cup and diverting the paint liquid radially outward, and the distribution cap further has countersunk recesses around the pre-formed holes, the recesses having dimensions and shapes for receiving the flange. Distribution cap assembly.

8. The distribution cap assembly according to claim 7, wherein the distribution cap is mounted on the mounting post, and the exposed surface of each flange of the mounting post is at the same height as the front surface of the distribution cap, or is recessed in a direction from the front surface of the distribution cap toward the opposite surface so that the paint liquid flowing over the front surface of the distribution cap does not collide with the outer edge of the flange.

9. The distribution cap assembly according to claim 7, wherein each of the mounting posts has a fillet at the joint between the central portion and the flange.

10. The distribution cap assembly according to claim 7, wherein the plurality of mounting posts are three mounting posts.

11. The distribution cap assembly according to claim 7, wherein each of the mounting posts is made of a single piece of titanium or stainless steel, and the distribution cap is made of a resin material.

12. The distribution cap assembly according to claim 7, wherein the distribution cap has a metal insert in its center, and the flow of the paint liquid collides with the insert and diffuses radially outward on the front surface of the distribution cap.

13. Each of the first ends of the mounting post has a male thread configured to be inserted into the female threaded hole of the base portion of the bell cup, or The distribution cap assembly according to claim 7, wherein the first end has a return shape configured to be press-fitted into a resin insert placed in a hole in the base portion of the bell cup.

14. A rotary sprayer used in spray painting robots, A bell cup mounted on the outer arm or wrist of the robot, which is rotatable around a central axis, Multiple mounting posts, Equipped with a distribution cap, Each of the mounting posts has a first end configured to be fixedly embedded inside the base portion of the bell cup, a second end having a return shape on the opposite side of the first end, a cylindrical central portion positioned between the first end and the second end and having a larger diameter than the first end and the second end, and a disc-shaped flange positioned between the second end and the central portion and having a larger diameter than the central portion. The distribution cap has a plurality of pre-formed holes, one of which receives the second end of each of the mounting posts, thereby fixing the distribution cap in the internal position of the bell cup and diverting the paint liquid radially outward; the distribution cap further has countersunk recesses around each of the plurality of pre-formed holes, the recesses having dimensions and shape for receiving the flange. Rotary sprayer.

15. The rotary sprayer according to claim 14, wherein when the distribution cap is installed on the mounting post, the exposed surface of each flange of the mounting post is at the same height as the front surface of the distribution cap, or is recessed in a direction from the front surface of the distribution cap toward the opposite surface so that the paint liquid flowing over the front surface of the distribution cap does not collide with the outer edge of the flange.

16. The rotary sprayer according to claim 14, wherein each of the mounting posts has a fillet at the joint between the central portion and the flange.

17. The rotary sprayer according to claim 14, wherein each of the mounting posts is made of a single piece of titanium or stainless steel, and the distribution cap is made of a resin material.

18. The rotary sprayer according to claim 14, wherein the distribution cap has a metal insert in its center, the flow of the paint liquid collides with the insert, and at least a portion of the flow diffuses radially outward on the front surface of the distribution cap.

19. Each of the first ends of the mounting post has a male thread configured to be inserted into the female threaded hole of the base portion of the bell cup, or The rotary sprayer according to claim 14, wherein the first end has a return shape configured to be press-fitted into a resin insert placed in the hole of the base portion of the bell cup.

Images