A powder tray device and powder application method for a diamond polishing machine

Abstract

This invention discloses a powder tray device for a diamond polishing machine, belonging to the technical field of diamond processing equipment. It includes a frame, a powder box, a lifting structure, a vibrating powder feeding structure at the front of the powder box, and a powder scraping structure at the front of the powder box. The powder box is closed and tilted downwards from back to front. The vibrating powder feeding structure includes multiple scraping blades arranged side-by-side, which reciprocate synchronously left and right. The powder scraping structure includes a roller cover, a powder scraping roller inside the roller cover, a powder-adhesive port at the top of the roller cover, a powder inlet on the rear side of the roller cover that cooperates with the powder box, a scraper blade at the top of the roller cover located in front of the powder-adhesive port, and an indexing drive mechanism for driving the powder scraping roller to rotate in an indexing manner. Multiple powder-carrying grooves are indexed on the circumference of the powder scraping roller, with the top powder-carrying groove located directly below the powder-adhesive port. The rear side of the powder scraping roller rotates downwards, and the powder-carrying grooves can scrape the powder inside the roller cover to the top of the powder scraping roller. The scraper blade contacts the powder scraping roller.

Description

Technical Field

[0001] This invention belongs to the technical field of diamond processing equipment, and specifically relates to a powder tray device and powder application method for a diamond grinding and polishing machine. Background Technology

[0002] The powder tray is a crucial component of a rhinestone grinding and polishing machine. Its scraping mechanism leveles the powder within the tray, ensuring that the rhinestones on the side-by-side clamping needles are evenly coated with powder for subsequent processing. Most rhinestone grinding and polishing machines on the market today use an open, flat powder tray. During operation, the conveyor rod descends and moves horizontally, spreading powder across the entire tray. Then, the conveyor rod rises, and the scraping rod descends and moves horizontally again, leveling the powder within the tray.

[0003] For example, in the prior art, CN108381327A discloses a powder scraping structure for a water-jet polishing machine. This structure uses a cylinder and a transmission mechanism to drive the powder-carrying rod and the powder scraping rod to move up and down. The powder tray also adopts a planar structure for powder scraping. The disadvantages of planar powder scraping are: a large exposed area, and the movement during production easily causes dust to be stirred up, resulting in waste, dust floating in the workshop, seriously affecting the production environment, and posing a health hazard to production personnel; pollutants and waste materials easily accumulate in the powder tray; and the powder thickness is uneven when the clamps adhere powder to the tray. Therefore, designing a safe, reliable, and dust-reducing new powder scraping structure is an inevitable requirement. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems and shortcomings by providing a powder tray device for a diamond polishing machine that reduces dust generation, ensures a dust-free production environment, and maintains consistent powder thickness. The technical solution is as follows: On one hand, embodiments of the present invention provide a powder tray device for a diamond polishing machine. This device includes a frame 1, a powder box 7 on the frame 1, a lifting structure 2 on the frame 1 for driving the powder box 7 up and down, a vibrating powder feeding structure 3 at the front of the powder box 7, and a powder scraping structure 4 at the front end of the powder box 7. The powder box 7 is closed and tilts downwards from back to front. The vibrating powder feeding structure 3 includes multiple powder scraping blades 34 arranged side-by-side, which reciprocate synchronously in the left and right directions. The powder scraping structure 4 includes a roller cover 41 arranged in the left and right directions, a powder scraping roller 42 inside the roller cover 41, and a top of the roller cover 41... The roller cover 41 has a left-right oriented powder-adhesive inlet 43, a powder inlet 40 on the rear side of the roller cover 41 that cooperates with the powder box 7, a scraper blade 44 on the top of the roller cover 41 and located on the front side of the powder-adhesive inlet 43, and an indexing drive mechanism 45 for driving the scraper roller 42 to rotate in an indexing manner. The scraper roller 42 has multiple powder-carrying grooves 46 evenly distributed on its circumference and corresponding to the indexing rotation angle. The top powder-carrying groove 46 is located directly below the powder-adhesive inlet 43. The rear side of the scraper roller 42 rotates downward. The powder-carrying grooves 46 can scrape the powder inside the roller cover 41 to the top of the scraper roller 42. The scraper blade 44 is in contact with the scraper roller 42.

[0005] Furthermore, in this embodiment of the invention, the powder box 7 is provided with a powder storage compartment 5 at the rear. The top of the powder storage compartment 5 protrudes upward relative to the top of the powder box 7 and is provided with an openable compartment door 6 at its top.

[0006] Specifically, in this embodiment of the invention, the roller cover 41 is a cylindrical structure, which is coaxially arranged with the powder scraping roller 42, and the distance between its inner wall and the powder scraping roller 42 is greater than the diameter of the blank bead; the powder inlet 40 is arranged in the middle of the rear side of the roller cover 41 in the left-right direction, the indexing drive mechanism 45 is an indexing motor arranged in the left-right direction on the left or right side of the roller cover 41, the lifting structure 2 is arranged between the bottom of the roller cover 41 and the frame 1, and the powder sticking port 43 is located directly below the diamond-cutting fixture.

[0007] Preferably, in this embodiment of the invention, the powder inlet 40 is arranged obliquely downward from back to front so that it forms a powder collection cavity with the rear side of the powder scraping roller 42, and the powder carrying groove 46 at the rear end of the powder scraping roller 42 is arranged directly opposite the powder inlet 40.

[0008] In this embodiment of the invention, the powder-carrying groove 46 is arranged in the left-right direction. It is an angular groove that is open to the circumferential surface. The angle between one groove side facing away from the rotation direction and the circumferential surface is greater than the angle between the other groove side and the circumferential surface. The two groove sides of the powder-carrying groove 46 at the top are located in front of and behind the diamond-carrying fixture, respectively.

[0009] In this embodiment of the invention, the vibrating powder feeding structure 3 includes two guide rods 31 arranged side by side, two tension plates 32, two sieving cylinders 33, and multiple powder scraping blades 34 arranged side by side on the two guide rods 31. The guide rods 31 are arranged in the left-right direction and can slide left and right on the powder box 7, with their left and right ends extending outwards to the corresponding sides of the powder box 7. The two tension plates 32 are located on the outer sides of the left and right sides of the powder box 7, arranged in the front-back direction, and are fixedly connected to the left and right ends of the guide rods 31, respectively. The two sieving cylinders 33 are respectively located on the powder box. The left and right sides of 7 and their opposite movements; the sieving cylinder 33 is arranged in the left and right direction, located between two guide rods 31, and the outer end of its telescopic rod is fixedly connected to the inner middle of the corresponding side pull plate 32; the powder scraper 34 is located inside the glue powder box 7, its front and rear parts are respectively fixed on the two guide rods 31, it is arranged in the front and back direction, its lower side is located adjacent to the bottom of the glue powder box 7, and its front end is a bevel; the bevel is arranged obliquely forward from top to bottom, its front part is located inside the powder inlet 40, and the distance between its front end and the powder scraper roller 42 is greater than the diameter of the blank bead.

[0010] Furthermore, in this embodiment of the invention, a powder-blocking plate 47 is provided on the top of the roller cover 41 and on the rear side of the powder-adhesive port 43. The powder-blocking plate 47 is in contact with the powder-scraping roller 42, and the scraper blade 44 and the powder-blocking plate 47 are respectively located in front of and behind the rhinestone fixture.

[0011] Preferably, in this embodiment of the invention, the bottom of the roller cover 41 is provided with discharge holes 48 at both the left and right ends. The two discharge holes 48 are respectively located on the outer side of the corresponding side of the decorative drill fixture. The discharge hole 48 is an elongated hole arranged in the front-back direction and its width is greater than the diameter of the blank bead. The bottom of the roller cover 41 and directly below the discharge hole 48 is provided with a sealed waste collection chamber 49.

[0012] Specifically, in this embodiment of the invention, the powder scraping roller 42 is provided with eight powder-carrying grooves 46, and the corresponding indexing rotation angle of the powder scraping roller 42 is 45°; the scraper blade 44 is arranged horizontally in the front-to-back direction, and the powder-blocking plate 47 is arranged obliquely forward from top to bottom; the powder-carrying groove 46 is a right-angled groove with a depth greater than 5mm, and the angle between the groove edge of the top powder-carrying groove 46 facing away from the rotation direction and the diamond-cutting fixture is 10-25°; the distance between the powder scraping roller 42 and the inner wall of the roller cover 41 is 0.5-5.0mm.

[0013] On the other hand, embodiments of the present invention also provide a powdering method, the method comprising: S101: The lifting structure 2 drives the powder box 7 to move upward. At the same time, multiple scraper blades 34 move back and forth synchronously. The powder in the powder box 7 enters the roller cover 41 evenly and dispersedly. The powder in the top powder groove 46 is loaded with powder and has been scraped flat by the scraper blades 44.

[0014] S102: When the powder box 7 moves to the high position, it remains stationary for a predetermined time. At the same time, the powder-carrying groove 46 at the top moves upward to the lower part of the rhinestone clamp, and the rhinestone clamp applies powder.

[0015] S103: The lifting structure 2 drives the powder box 7 to move downward, while at the same time, the powder scraping roller 42 rotates in increments.

[0016] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows: 1. Replacing the flat powder scraper with a rotary powder scraper can effectively reduce dust generation during powder adhesion. 2. A scraper blade is installed at the powder-adhesive inlet to reduce the exposed powder area, while ensuring that the powder surface at the powder-adhesive area is flat, uniform, and smooth, with each layer of powder having a uniform thickness; the scraper blade and the powder-blocking plate seal the roller cover. 3. The feeding structure adopts a vibrating powder feeding structure. The scraper driven by the screen cylinder prevents the glue powder (which is easy to agglomerate) from accumulating in the box, ensuring that the glue powder can smoothly reach the roller cover and reducing the accumulation of glue powder in dead corners. 4. Two discharge holes are provided at both ends of the bottom of the roller cover to allow the blank beads and waste materials that fall off when the clamp is sticking to the powder port to be discharged, preventing the amount of powder in the roller from accumulating and forming powder lumps; the fallen blank beads are discharged to the outside to avoid the powder scraping roller getting stuck and to avoid wear on the decorative diamond clamp. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the powder disc device of the diamond polishing machine in an embodiment of the present invention; Figure 2 yes Figure 1 Exploded view; Figure 3 This is a schematic diagram of the internal structure of the powder disc device in a diamond polishing machine; Figure 4 yes Figure 1 A schematic diagram of the powder disc device of a diamond polishing machine from another perspective; Figure 5 This is a cross-sectional view of the powder disc device of a diamond polishing machine; Figure 6 yes Figure 5 A magnified view of a portion of the image.

[0018] In the diagram: 1. Frame, 2. Lifting structure, 3. Vibrating powder feeding structure, 4. Powder scraping structure, 5. Powder storage silo, 6. Silo door, 7. Adhesive powder box; 31 Guide rod, 32 Pulling plate, 33 Screening cylinder, 34 Powder scraper, 35 Sealing plate; 40 Powder inlet, 41 Drum cover, 42 Powder scraping drum, 43 Powder sticking port, 44 Scraper blade, 45 Indexing drive mechanism, 46 Powder carrying groove, 47 Powder blocking plate, 48 Discharge hole, 49 Waste collection chamber. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1 See Figure 1-6Example 1 provides a powder tray device for a diamond polishing machine. This device includes a frame 1, a powder box 7 on the frame 1, a lifting structure 2 on the frame 1 for driving the powder box 7 up and down, a vibrating powder feeding structure 3 at the front of the powder box 7, a scraping structure 4 at the front of the powder box 7, and a powder storage bin 5 at the rear of the powder box 7. The powder box 7 is enclosed and arranged in a front-to-back direction, with its bottom sloping downwards from back to front. The lifting structure 2 drives the powder box 7 and the scraping structure 4 to reciprocate up and down; it can be a cylinder lifting structure or a cam lifting structure (preferably). The powder storage bin 5 stores and replenishes powder; its top protrudes upwards relative to the top of the powder box 7, and its top has an openable door 6 (rotatable or detachable, etc.). The vibrating powder feeding structure 3 includes multiple scraping blades 34 arranged side-by-side, which reciprocate synchronously in a left-right direction. The powder scraping structure 4 includes a roller cover 41 arranged in a left-right direction, a powder scraping roller 42 inside the roller cover 41, a powder-adhesive inlet 43 on the top of the roller cover 41 arranged in a left-right direction, a powder inlet 40 on the rear side of the roller cover 41 that cooperates with the powder box 7, a scraper blade 44 on the top of the roller cover 41 located in front of the powder-adhesive inlet 43, a powder-blocking plate 47 on the top of the roller cover 41 located behind the powder-adhesive inlet 43, an indexing drive mechanism 45 for driving the powder scraping roller 42 to rotate in an indexing manner, two discharge holes 48 at the bottom of the roller cover 41, and two waste collection chambers 49 at the bottom of the roller cover 41. Multiple powder-carrying grooves 46 are evenly distributed on the circumference of the powder scraping roller 42, corresponding to the indexing rotation angle; that is, the multiple powder-carrying grooves 46 are indexed. The top powder-carrying groove 46 is located directly below the powder-adhesive inlet 43. The indexing rotation of the powder scraping roller 42 causes each powder-carrying groove 46 to be sequentially located directly below the powder-adhesive inlet 43. The rear side of the scraping roller 42 rotates downwards, and the powder-carrying groove 46 scrapes the adhesive powder inside the roller cover 41 to the top of the scraping roller 42. The rear end of the scraper blade 44 contacts (specifically, is tangential to) the upper part of the scraping roller 42, and the front end of the powder-blocking plate 47 contacts (specifically, is tangential to) the upper part of the scraping roller 42. Both the scraper blade 44 and the powder-blocking plate 47 are arranged in the left-right direction and are located in front of and behind the decorative drill fixture, respectively, sealing the gap between the scraping roller 42 and the roller cover 41. Two discharge holes 48 are located at the left and right ends of the bottom of the roller cover 41, respectively, and are located on the outer side of the corresponding side of the decorative drill fixture to ensure that the adhesive powder in the powder-carrying groove 46 at the decorative drill fixture is uniform. The discharge hole 48 is an elongated hole arranged in the front-back direction and its width is greater than the diameter of the blank bead to ensure that the blank bead can pass downwards. A sealed waste collection chamber 49 is provided at the bottom of the roller cover 41 and directly below the discharge hole 48.

[0021] Specifically, see Figure 1-6In this embodiment of the invention, the roller cover 41 has a cylindrical structure and is coaxially arranged with the powder scraping roller 42. The distance between its inner wall and the powder scraping roller 42 is greater than (specifically slightly greater than) the diameter of the blank bead to prevent the powder scraping roller 42 from being jammed by falling blank beads. The powder inlet 40 is located in the middle of the rear side of the roller cover 41 along the left-right direction, and its lower side is flush with the bottom of the front end of the glue powder box 7. The indexing drive mechanism 45 is an indexing motor (coaxially fixed with the left or right end of the powder scraping roller 42) located on the left or right side of the roller cover 41 along the left-right direction. Since the powder scraping structure 4 is relatively heavy, the lifting structure 2 is directly located between the bottom of the roller cover 41 and the frame 1. The powder adsorption port 43 is located directly below the rhinestone clamp.

[0022] Preferably, see Figure 6 In this embodiment of the invention, the powder inlet 40 is arranged obliquely downward from back to front so that it forms a powder collection cavity with the rear side of the powder scraping roller 42 (which can hold a certain amount of adhesive powder, so that the adhesive powder can enter the powder carrying groove 46 at the rear end of the powder scraping roller 42). The powder carrying groove 46 at the rear end of the powder scraping roller 42 is set directly opposite the powder inlet 40.

[0023] In this embodiment of the invention, the powder-carrying groove 46 is arranged in a left-right direction. It is an angular groove that opens towards the circumferential surface. The angle between one groove side facing away from the rotation direction and the circumferential surface is greater than the angle between the other groove side and the circumferential surface, so as to ensure that the adhesive powder can be transported to the top of the powder scraper roller 42 as it rotates. The two groove sides of the powder-carrying groove 46 at the top are located in front of and behind the rhinestone fixture, respectively.

[0024] Among them, see Figure 1-5The vibrating powder feeding structure 3 in this embodiment includes two guide rods 31 arranged side-by-side, two tension plates 32, two sieving cylinders 33, two sealing plates 35, and multiple powder scraping blades 34 arranged side-by-side on the two guide rods 31. The guide rods 31 are arranged in the left-right direction and can slide left-right on the powder box 7. Their left and right ends extend outwards through the corresponding sides of the powder box 7, and are slidably connected to the corresponding sides of the powder box 7 via left-right sliding sleeves. The two tension plates 32 are located on the outer sides of the left and right sides of the powder box 7, respectively, and are arranged in the front-back direction. They are fixedly connected to the left and right ends of the guide rods 31. The two tension plates 32 and the two guide rods 31 form a rectangular frame. The two sieving cylinders 33 are respectively located on the left and right sides of the powder box 7; the two sieving cylinders 33 move synchronously in opposite directions, with one sieving cylinder 33 extending while the other retracts. The sieving cylinder 33 is arranged in a left-right direction, located between two guide rods 31. The inner end of its cylinder body is fixed to the corresponding side of the powder box 7, and the outer end of its telescopic rod is fixedly connected to the inner middle of the pull plate 32 on the corresponding side. The scraper blade 34 is located inside the powder box 7, with its front and rear parts fixed to the ends of the two guide rods 31 respectively. It is arranged in a front-back direction, with its lower side (inclined) located adjacent to the bottom of the powder box 7. Its front end is beveled to ensure that the powder is guided into the roller cover 41. The beveled edge is arranged diagonally forward from top to bottom, with its front part located inside the powder inlet 40. The distance between its front end and the scraper roller 42 is greater than (specifically slightly greater than) the diameter of the blank to prevent the scraper roller 42 from jamming. Two sealing plates 35 are respectively arranged on the left and right sides of the powder box 7, located directly above the pull plate 32 on the corresponding side to cover the ends of the pull plate 32 and the guide rods 31. Specifically, they are L-shaped plates.

[0025] The working principle of this device is as follows: The adhesive powder in the adhesive powder box 7 slides into the vibrating powder feeding structure 3. The controller controls the two sieving cylinders 33 to start, pushing the two guide rods 31 in the same direction, which in turn drive the scraper blades 34 to move left and right to scrape the powder. The adhesive powder enters the roller cover 41 from the powder inlet 40 and enters the powder carrying groove 46. The scraper roller 42 rotates until all the powder carrying grooves 46 are filled with adhesive powder. Each time the scraper roller 42 rotates, the scraper blades 44 scrape the adhesive powder in the powder carrying grooves 46 to compact and level it. Some of the adhesive powder that flies out is blocked back by the powder blocking plate 47. The lifting structure 2 is activated, raising the scraper roller 42 to contact the diamond fixture, and then lowering it, repeating this process.

[0026] Example 2 Example 2 provides a powder tray device for a diamond polishing machine, which has a structure that is basically the same as that of Example 1, except that the gap between the scraper blade 44 and the powder baffle 47 and the powder scraping roller 42 is adjustable. Specifically, both the scraper blade 44 and the powder baffle 47 have elongated holes along their adjustment direction, and the scraper blade 44 and the powder baffle 47 are fixed to the top of the roller cover 41 by locking bolts passing through the elongated holes.

[0027] Example 3 Example 3 provides a powder disc device for a diamond polishing machine. Its structure is basically the same as that of Example 1, except that the lifting structure 2 in this example is a cam lifting structure and a fine-tuning structure is provided between it and the roller cover 41.

[0028] Example 4 Example 4 provides a powder tray device for a diamond polishing machine, which is basically the same as the structure of Example 1, except that: in this example, the powder scraper roller 42 is provided with eight powder-carrying grooves 46, and the indexing rotation angle of the powder scraper roller 42 is 45°. The scraper blade 44 is horizontally arranged in the front-to-back direction, and the powder-blocking plate 47 is obliquely forward arranged from top to bottom. The powder-carrying grooves 46 are right-angled grooves with a depth greater than 5mm, and the angle between the groove edge of the top powder-carrying groove 46 facing away from the rotation direction and the diamond fixture is 10-25°. The distance between the powder scraper roller 42 and the inner wall of the roller cover 41 is 0.5-5.0mm.

[0029] Example 5 See Figure 1-6 Example 5 provides a powdering method using the powder tray device of the diamond polishing machine provided in Examples 1-4. The method includes: S101: The lifting structure 2 drives the powder box 7 to move upward. Due to the synchronous reciprocating motion of multiple scraping blades 34, the powder in the powder box 7 enters the roller cover 41 evenly and dispersedly. The powder-carrying groove 46 at the top is filled with powder and has been scraped flat by the scraping blades 44.

[0030] S102: When the powder box 7 moves to the high position, it remains stationary for a predetermined time (e.g., 1 second). At the same time, the powder-carrying groove 46 at the top moves upward to the lower part of the rhinestone clamp, and the rhinestone clamp applies powder.

[0031] S103: The lifting structure 2 drives the powder box 7 to move downward, while at the same time, the powder scraping roller 42 rotates in increments.

[0032] In steps S101-S103, multiple scraper blades 34 move synchronously left and right to reciprocate for feeding.

[0033] By repeatedly performing steps S101-S103, powder can be applied.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A powder tray device for a diamond polishing machine, comprising a frame (1), a powder box (7) on the frame (1), and a lifting structure (2) on the frame (1) for driving the powder box (7) to move up and down; characterized in that, It also includes a vibrating powder feeding structure (3) at the front of the powder box (7) and a powder scraping structure (4) at the front end of the powder box (7); the powder box (7) is closed and tilts downward from back to front; the vibrating powder feeding structure (3) includes multiple powder scraping blades (34) arranged side by side on the left and right, and the multiple powder scraping blades (34) move back and forth synchronously in the left and right directions; the powder scraping structure (4) includes a roller cover (41) arranged in the left and right directions, a powder scraping roller (42) inside the roller cover (41), a powder sticking port (43) arranged on the top of the roller cover (41) in the left and right directions, and a powder inlet (43) on the rear side of the roller cover (41) that cooperates with the powder box (7). 40) A scraper blade (44) on the top of the roller cover (41) and located on the front side of the powder-adhesive port (43) and an indexing drive mechanism (45) for driving the indexing rotation of the scraper roller (42). The scraper roller (42) has multiple powder-carrying grooves (46) evenly distributed on its circumference and corresponding to the indexing rotation angle. The powder-carrying groove (46) at the top is located directly below the powder-adhesive port (43). The rear side of the scraper roller (42) rotates downward. The powder-carrying groove (46) can scrape the adhesive powder in the roller cover (41) to the top of the scraper roller (42). The scraper blade (44) contacts the scraper roller (42).

2. The powder disc device of the diamond polishing machine according to claim 1, characterized in that, The powder box (7) is provided with a powder storage compartment (5) at the rear. The top of the powder storage compartment (5) protrudes upward relative to the top of the powder box (7) and has an openable compartment door (6) at its top.

3. The powder disc device of the diamond polishing machine according to claim 1, characterized in that, The roller cover (41) is a cylindrical structure, which is coaxially arranged with the powder scraping roller (42). The distance between its inner wall and the powder scraping roller (42) is greater than the diameter of the blank bead. The powder inlet (40) is located in the middle of the rear side of the roller cover (41) in the left-right direction. The indexing drive mechanism (45) is an indexing motor located on the left or right side of the roller cover (41) in the left-right direction. The lifting structure (2) is located between the bottom of the roller cover (41) and the frame (1). The powder sticking port (43) is located directly below the diamond cleaver.

4. The powder disc device of the diamond polishing machine according to claim 3, characterized in that, The powder inlet (40) is arranged obliquely downward from back to front so that it forms a powder collection cavity with the rear side of the powder scraper roller (42), and the powder carrying groove (46) at the rear end of the powder scraper roller (42) is arranged directly opposite the powder inlet (40).

5. The powder disc device of the diamond polishing machine according to claim 4, characterized in that, The powder-carrying groove (46) is arranged in the left and right direction. It is an angular groove that is open to the circumference. The angle between one groove side facing away from the rotation direction and the circumference is greater than the angle between the other groove side and the circumference. The two groove sides of the powder-carrying groove (46) at the top are located in front of and behind the diamond chuck, respectively.

6. The powder disc device of the diamond polishing machine according to claim 1, characterized in that, The vibrating powder feeding structure (3) includes two guide rods (31) arranged side by side, two traction plates (32), two sieving cylinders (33), and multiple scraper blades (34) arranged side by side on the two guide rods (31); the guide rods (31) are arranged in the left-right direction and can slide in the left-right direction on the powder box (7), with their left and right ends extending outwards to the corresponding sides of the powder box (7); the two traction plates (32) are respectively located on the outer sides of the left and right sides of the powder box (7), arranged in the front-back direction, and are respectively fixedly connected to the left and right ends of the guide rods (31); the two sieving cylinders (33) are respectively located on the powder box (31) 7) The left and right sides and their opposite movements; the sieving cylinder (33) is arranged in the left and right direction, and it is located between two guide rods (31). The outer end of its telescopic rod is fixedly connected to the inner middle of the corresponding side pull plate (32); the scraper (34) is located in the glue powder box (7). Its front and rear parts are respectively fixed on the two guide rods (31). It is arranged in the front and back direction. Its lower side is located adjacent to the bottom of the glue powder box (7). Its front end is a bevel; the bevel is arranged obliquely forward from top to bottom. Its front part is located in the powder inlet (40). The distance between its front end and the scraper roller (42) is greater than the diameter of the blank bead.

7. The powder disc device of the diamond polishing machine according to claim 5, characterized in that, A powder-blocking plate (47) is provided on the top of the roller cover (41) and on the rear side of the powder-adhesive port (43). The powder-blocking plate (47) is in contact with the powder-scraping roller (42). The scraper blade (44) and the powder-blocking plate (47) are located in front of and behind the diamond-cutting fixture, respectively.

8. The powder disc device of the diamond polishing machine according to claim 1, characterized in that, The bottom of the roller cover (41) is provided with discharge holes (48) at both the left and right ends. The two discharge holes (48) are located on the outer side of the corresponding side of the decorative drill chuck. The discharge hole (48) is an elongated hole arranged in the front-back direction and its width is greater than the diameter of the blank bead. The bottom of the roller cover (41) and directly below the discharge hole (48) is provided with a sealed waste collection chamber (49).

9. The powder disc device of the diamond polishing machine according to claim 7, characterized in that, The powder scraping roller (42) is provided with 8 powder-carrying grooves (46) at the indexing. Correspondingly, the indexing rotation angle of the powder scraping roller (42) is 45°. The scraper blade (44) is arranged horizontally in the front-back direction, and the powder baffle (47) is arranged obliquely forward from top to bottom. The powder-carrying groove (46) is a right-angled groove with a depth greater than 5mm. The angle between the groove edge of the powder-carrying groove (46) at the top facing away from the rotation direction and the diamond fixture is 10-25°. The distance between the powder scraping roller (42) and the inner wall of the roller cover (41) is 0.5-5.0mm.

10. A powder application method using the powder tray device of a diamond polishing machine as described in any one of claims 1-9, characterized in that, The method includes: S101: The lifting structure (2) drives the powder box (7) to move upward. At the same time, multiple scraper blades (34) move back and forth in a synchronized manner. The powder in the powder box (7) enters the roller cover (41) evenly and dispersedly. The powder-carrying groove (46) at the top is filled with powder and has been scraped flat by the scraper blades (44). S102: When the powder box (7) moves to the high position, it remains stationary for a predetermined time. At the same time, the powder-carrying groove (46) on the top moves upward to the lower part of the diamond fixture, and the diamond fixture applies powder. S103: The lifting structure (2) drives the powder box (7) to move downward, while the powder scraping roller (42) rotates in increments.

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