A powder screening device for producing talc powder

Abstract

The utility model belongs to talc production technical field, concretely relates to a powder screening device for producing talc, including the box, the inside one end of box is fixed with first support plate and second support plate from top to bottom in proper order, both sides of first support plate lower extreme are all fixed with first limit rod, the outside slide connection of two first limit rods has first sieve plate, both sides of second support plate upper extreme are all fixed with second limit rod, the outside slide connection of two second limit rod has second sieve plate, the side of first sieve plate and second sieve plate each other close is all connected support frame, the inside fixed with fixed wheel of two support frames, the outside fixed with bearing plate of box, the upper end fixed with first motor of bearing plate, the inside driving connection of box has first rotation rod, this utility model can pass through the cam drive first sieve plate and second sieve plate and slide along the limit rod up and down, realizes the multistage accurate screening to talc.

Description

Technical Field

[0001] This utility model belongs to the field of talc production technology, specifically relating to a powder screening device for producing talc. Background Technology

[0002] Talc is a common mineral powder, mainly composed of hydrated magnesium silicate. It is a white or translucent powder with a smooth touch and good insulation properties. Talc is widely used in plastics, rubber, cosmetics, pharmaceuticals and other industrial fields.

[0003] A talc powder screening and classification device with prior art authorization announcement number CN220048879U includes a machine casing and a feed hopper set on the top of the machine casing. A sieve plate for screening talc powder is set inside the machine casing. A push plate and a suction fan are rotatably arranged above the sieve plate. One end of the sieve plate is spaced apart from the inner side wall of the machine casing. A collection box is set at the bottom of the sieve plate.

[0004] The above-mentioned utility model has the following shortcomings: the sieving size of talc powder is limited, and when it is necessary to sieve talc powder of different specifications, another equipment is required for processing, which reduces the sieving efficiency of talc powder and increases the production cost. Therefore, a talc powder sieving device is proposed. Based on the above problems, this application proposes a powder sieving device for producing talc powder to improve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a powder screening device for producing talc powder, which can drive the first and second screen plates to slide up and down along the limiting rod via a cam, thereby achieving multi-stage precise screening of talc powder.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] A powder screening device for producing talc powder includes a housing. Inside the housing, a first support plate and a second support plate are fixed from top to bottom at one end. First limiting rods are fixed to both sides of the lower end of the first support plate. A first sieve plate is slidably connected to the outer sides of the two first limiting rods. Second limiting rods are fixed to both sides of the upper end of the second support plate. A second sieve plate is slidably connected to the outer sides of the two second limiting rods. Support frames are connected to the sides of the first and second sieve plates that are close to each other. Fixed wheels are fixed inside the two support frames. A load-bearing plate is fixed to the outer side of the housing. A first motor is fixed to the upper end of the load-bearing plate. A first rotating rod is actively connected inside the housing. The end of the first rotating rod near the load-bearing plate passes through the housing and extends to the outside of the housing. One end of the first rotating rod is fixedly connected to the output end of the first motor. A cam is fixed to the outer side of the first rotating rod, and the cam is located between the two fixed wheels.

[0008] In a preferred embodiment, a first damping pad is fixed to the outer side of each of the two first limiting rods and at the lower end of the first sieve plate, a first limiting plate is fixed to the outer side of each of the two first limiting rods and at the lower end of the first damping pad, a second damping pad is fixed to the outer side of each of the two second limiting rods and at the upper end of the second sieve plate, and a second limiting plate is fixed to the outer side of each of the two second limiting rods and at the upper end of the second damping pad.

[0009] In a preferred embodiment, a first limiting groove and a second limiting groove are sequentially formed from top to bottom at one end of the box body. A first sliding plate is fixed to the side of the first sieve plate near the first limiting groove, and the first limiting groove and the first sliding plate are adapted to each other. A second sliding plate is fixed to the side of the second sieve plate near the second limiting groove, and the second limiting groove and the second sliding plate are adapted to each other.

[0010] In a preferred embodiment, a first spring is fixed to the lower end of the first support plate and to the outside of the two first limiting rods, and a second spring is fixed to the upper end of the second support plate and to the outside of the two second limiting rods.

[0011] In a preferred embodiment, a feed hopper is provided at the upper end of the box, and a cover plate is rotatably connected to one side of the feed hopper.

[0012] In a preferred embodiment, the end of the housing away from the first support plate has a first discharge hole and a second discharge hole sequentially formed from top to bottom. A protective cover is fixed to the side of the housing away from the load-bearing plate. A bottom plate is fixed to the inner wall of the protective cover. A second motor is fixed to the upper end of the bottom plate. A first gear is fixed to the output end of the second motor. A second gear is provided at the upper end of the first gear, and the first gear and the second gear are meshed together. A second rotating rod is fixed inside the second gear. One end of the second rotating rod passes through the first discharge hole and extends into the interior of the housing. The second rotating rod and the housing are rotatably connected. A first material-pulling plate is fixed to the outside of the second rotating rod and inside the first discharge hole. A third gear is provided at the lower end of the first gear, and the first gear and the third gear are meshed together. A third rotating rod is fixed inside the third gear. One end of the third rotating rod passes through the second discharge hole and extends into the interior of the housing. The third rotating rod and the housing are rotatably connected. A second material-pulling plate is fixed to the outside of the third rotating rod and inside the second discharge hole.

[0013] In a preferred embodiment, a first base and a second base are fixed sequentially from top to bottom at one end of the box body near the first discharge port. A first collection box is provided at the upper end of the first base, and a second collection box is provided at the upper end of the second base.

[0014] In a preferred embodiment, a third discharge hole is provided at the lower end of the interior of the box, and a third collection box is slidably connected inside the third discharge hole.

[0015] The technical effects achieved by this utility model are as follows:

[0016] This utility model uses a cam to drive the first and second sieve plates to slide up and down along a limiting rod. Larger talc particles are intercepted by the first sieve plate and guided to the first discharge hole through the inclined surface and the guide surface. Medium-sized talc particles pass through the first sieve plate and are intercepted by the second sieve plate, and are output from the second discharge hole through the corresponding guide structure. Fine particles pass through the second sieve plate and are discharged from the bottom of the box, thus achieving multi-stage precise screening of talc powder. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a rear view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the first discharge hole and the second discharge hole of this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 10. Box body; 11. First support plate; 12. Second support plate; 13. First limiting rod; 14. First sieve plate; 15. Second limiting rod; 16. Second sieve plate; 17. Support frame; 18. Fixed wheel; 19. Load-bearing plate; 20. First motor; 21. First rotating rod; 22. Cam; 23. First shock-absorbing pad; 24. First limiting plate; 25. Second shock-absorbing pad; 26. Second limiting plate; 27. First limiting groove; 28. Second limiting groove; 29. ​​First sliding plate; 30. Second sliding plate; 31. 32. First spring; 33. Second spring; 34. Feed hopper; 35. Cover plate; 36. First discharge hole; 47. Second discharge hole; 48. Protective cover; 49. Base plate; 40. Second motor; 41. First gear; 42. Second gear; 43. Second rotating rod; 44. First feeding plate; 45. Third gear; 46. Third rotating rod; 47. Second feeding plate; 58. First base; 59. Second base; 50. First collection box; 51. Second collection box; 52. Third discharge hole; 53. Third collection box. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of this utility model. However, this utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this utility model. The phrase "in a preferred embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When detailing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] Please see the appendix Figures 1 to 3 As shown, this utility model provides a powder screening device for producing talc powder, including a housing 10. Inside the housing 10, a first support plate 11 and a second support plate 12 are fixed sequentially from top to bottom at one end. First limiting rods 13 are fixed to both sides of the lower end of the first support plate 11. A first screen plate 14 is slidably connected to the outer sides of the two first limiting rods 13. Second limiting rods 15 are fixed to both sides of the upper end of the second support plate 12. A second screen plate 16 is slidably connected to the outer sides of the two second limiting rods 15. The first screen plate 14 and the second screen plate 16 are close to each other. One side is connected to a support frame 17. Fixed wheels 18 are fixed inside the two support frames 17. A load-bearing plate 19 is fixed to the outside of the box body 10. A first motor 20 is fixed to the upper end of the load-bearing plate 19. A first rotating rod 21 is actively connected inside the box body 10. One end of the first rotating rod 21 near the load-bearing plate 19 passes through the box body 10 and extends to the outside of the box body 10. One end of the first rotating rod 21 is fixedly connected to the output end of the first motor 20. A cam 22 is fixed to the outside of the first rotating rod 21 and is located between the two fixed wheels 18.

[0028] In this embodiment, when talc powder needs to be sieved, the first motor 20 is started to drive the first rotating rod 21 to rotate. The rotation of the first rotating rod 21 drives the cam 22 fixed on its outer side to rotate. During the rotation, the cam 22 presses against the two fixed wheels 18, causing the first screen plate 14 and the second screen plate 16, which are connected to the fixed wheels 18 via the support frame 17, to slide up and down along the first limiting rod 13 and the second limiting rod 15, respectively, thereby achieving the sieving of talc powder. The talc powder enters the box 10 from the feed hopper 33 and is graded and screened by the first screen plate 14 and the second screen plate 16. It should be noted that the cam 22 can move the first screen plate 14 and the second screen plate 16 up and down when rotating. The ends of the first screen plate 14 and the second screen plate 16 away from the support frame 17 are both provided with inclined surfaces. The first support plate 11 and the second support plate 12 are close to the first outlet. Both the material hole 35 and the second discharge hole 36 have guide surfaces at their upper ends. In the initial state, the first screen plate 14 is located near the lower end of the first discharge hole 35, and the second support plate 12 is located near the upper end of the second discharge hole 36. When the cam 22 rotates to the apex of the cam 22 and pushes the support frame 17 and the fixed wheel 18 at the lower end of the first screen plate 14 to the uppermost end, the end of the first screen plate 14 near the first discharge hole 35 is parallel to the bottom end of the first discharge hole 35. When the cam 22 rotates to the apex of the cam 22 and pushes the support frame 17 and the fixed wheel 18 at the upper end of the second screen plate 16 to the lowermost end, the end of the second screen plate 16 near the second discharge hole 36 is parallel to the bottom end of the second discharge hole 36, and the filter holes on the first screen plate 14 are larger than the filter holes on the second screen plate 16.

[0029] In a preferred embodiment, please refer to Figure 3 A first damping pad 23 is fixed to the outer side of each of the two first limiting rods 13 and at the lower end of the first screen plate 14. A first limiting plate 24 is fixed to the outer side of each of the two first limiting rods 13 and at the lower end of the first damping pad 23. A second damping pad 25 is fixed to the outer side of each of the two second limiting rods 15 and at the upper end of the second screen plate 16. A second limiting plate 26 is fixed to the outer side of each of the two second limiting rods 15 and at the upper end of the second damping pad 25.

[0030] In this embodiment, when the first screen plate 14 slides up and down along the first limiting rod 13 to the lowest position under the drive of the cam 22, it will first contact the first shock-absorbing pad 23. The first shock-absorbing pad 23 absorbs and buffers the impact energy through its own elastic deformation. Then the first limiting plate 24 further rigidly limits the first screen plate 14. Similarly, when the second screen plate 16 slides up to the highest position, the impact is first buffered by the second shock-absorbing pad 25, and then rigidly limited by the second limiting plate 26.

[0031] The first damping pad 23 and the second damping pad 25 can effectively reduce the impact force generated when the screen plate collides with the limiting structure, which not only reduces the noise during equipment operation, but also slows down the wear rate of the parts and significantly extends the service life of the equipment; in addition, the first limiting plate 24 and the second limiting plate 26 limit the first screen plate 14 and the second screen plate 16.

[0032] Secondly, please refer to again Figure 3 The first limiting groove 27 and the second limiting groove 28 are sequentially opened from top to bottom at one end of the box body 10. The first screen plate 14 is fixed with a first sliding plate 29 on the side near the first limiting groove 27, and the first limiting groove 27 and the first sliding plate 29 are adapted to each other. The second screen plate 16 is fixed with a second sliding plate 30 on the side near the second limiting groove 28, and the second limiting groove 28 and the second sliding plate 30 are adapted to each other.

[0033] In this embodiment, when the first motor 20 drives the first rotating rod 21 to rotate the cam 22, the first screen plate 14 and the second screen plate 16 reciprocate up and down along the first limiting rod 13 and the second limiting rod 15, respectively. At this time, the first sliding plate 29 on the side of the first screen plate 14 slides synchronously in the first limiting groove 27, and the second sliding plate 30 on the side of the second screen plate 16 slides in the second limiting groove 28. Through the sliding cooperation of the first sliding plate 29, the second sliding plate 30 with the first limiting groove 27 and the second limiting groove 28, the movement of the first screen plate 14 and the second screen plate 16 is guided and constrained.

[0034] Secondly, please refer to the following as well. Figure 3 and Figure 4 A first spring 31 is fixed to the lower end of the first support plate 11 and to the outside of the two first limiting rods 13, and a second spring 32 is fixed to the upper end of the second support plate 12 and to the outside of the two second limiting rods 15.

[0035] In this embodiment, when the first motor 20 drives the first rotating rod 21 and the cam 22 to rotate, causing the first screen plate 14 to slide up and down along the first limiting rod 13 and the second screen plate 16 to slide up and down along the second limiting rod 15, the first screen plate 14 will apply pressure to the first spring 31 and the second spring 32 during the upward movement of the first screen plate 14 or the downward movement of the second screen plate 16, causing the first spring 31 and the second spring 32 to undergo compression deformation. When the movement direction of the first screen plate 14 and the second screen plate 16 changes, the first spring 31 and the second spring 32 in the compressed state will release elastic potential energy, pushing the first screen plate 14 and the second screen plate 16 to move in opposite directions, assisting the first screen plate 14 and the second screen plate 16 to achieve stable reciprocating movement.

[0036] To further understand and explain, Figure 1 For example, a feed hopper 33 is provided at the upper end of the box 10, and a cover plate 34 is rotatably connected to one side of the feed hopper 33.

[0037] In this embodiment, when performing talc powder screening, the cover plate 34 is opened around the feed hopper 33, and the talc powder is poured into the box 10 through the open feed hopper 33. When screening or when the equipment is idle, in transportation or maintenance, the cover plate 34 is rotated to close, so as to cover the opening of the feed hopper 33, to prevent dust from overflowing from the feed port during screening or to prevent external dust and debris from entering the box 10 and contaminating the material.

[0038] In a preferred embodiment, please refer to Figures 2 to 4 The box body 10, away from the first support plate 11, has a first discharge hole 35 and a second discharge hole 36 sequentially opened from top to bottom. A protective cover 40 is fixed to the side of the box body 10 away from the load-bearing plate 19. A bottom plate 41 is fixed to the inner wall of the protective cover 40. A second motor 42 is fixed to the upper end of the bottom plate 41. A first gear 43 is fixed to the output end of the second motor 42. A second gear 44 is provided at the upper end of the first gear 43, and the first gear 43 and the second gear 44 are meshed together. A second rotating rod 45 is fixed inside the second gear 44. One end of the second rotating rod 45 passes through the first discharge hole 35 and extends to the box body. Inside the housing 10, the second rotating rod 45 is rotatably connected to the housing 10. A first material feeding plate 46 is fixed on the outside of the second rotating rod 45 and inside the first discharge hole 35. A third gear 47 is provided at the lower end of the first gear 43, and the first gear 43 and the third gear 47 are meshed together. A third rotating rod 48 is fixed inside the third gear 47. One end of the third rotating rod 48 passes through the second discharge hole 36 and extends into the inside of the housing 10. The third rotating rod 48 is rotatably connected to the housing 10. A second material feeding plate 49 is fixed on the outside of the third rotating rod 48 and inside the second discharge hole 36.

[0039] In this embodiment, after the second motor 42 starts, it drives the first gear 43 to rotate. The first gear 43 meshes with the second gear 44 and the third gear 47, thereby driving the second rotating rod 45 and the third rotating rod 48 to rotate. The second rotating rod 45 drives the first material-pushing plate 46 to rotate within the first discharge hole 35, pushing out the material that meets the corresponding particle size requirements after being screened by the first screen plate 14 and accumulates near the first discharge hole 35. The third rotating rod 48 drives the second material-pushing plate 49 to rotate within the second discharge hole 36, pushing out the material that meets the corresponding particle size requirements after being screened by the second screen plate 16 and accumulates near the second discharge hole 36, thus realizing the automatic discharge of materials of different specifications. The rotating material-pushing method of the first material-pushing plate 46 and the second material-pushing plate 49 can effectively prevent the material from clogging at the discharge hole, ensuring that the screened material can be discharged smoothly and ensuring the smooth progress of the screening process. It should be noted that the rotation of the first material-pushing plate 46 and the second material-pushing plate 49 will not interfere with the up-and-down movement of the first screen plate 14 and the second screen plate 16.

[0040] Secondly, please refer to again Figure 1 The box body 10 is fixed with a first base 50 and a second base 51 from top to bottom at one end near the first discharge hole 35. The first collection box 52 is provided at the upper end of the first base 50, and the second collection box 53 is provided at the upper end of the second base 51. It should be noted that the first collection box 52 and the second collection box 53 are both provided with a feed inlet at the end near the first discharge hole 35 and the second discharge hole 36.

[0041] In this embodiment, when the first feeding plate 46 feeds the material screened by the first screen plate 14 out of the first discharge hole 35, the material falls directly into the first collection box 52 placed on the first base 50; after the second feeding plate 49 feeds the material screened by the second screen plate 16 out of the second discharge hole 36, the material falls into the second collection box 53 located on the second base 51, realizing the classified collection of materials screened by different specifications.

[0042] Secondly, please refer to the following as well. Figure 1 A third discharge hole 54 is provided at the lower end of the interior of the box 10, and a third collection box 55 is slidably connected inside the third discharge hole 54.

[0043] In this embodiment, after being screened by the first screen plate 14 and the second screen plate 16, the material that meets the fine particle size requirements will fall from the lower end of the box 10 into the third collection box 55. When the third collection box 55 is full, it can be directly pulled out from the third discharge hole 54 and replaced with an empty third collection box 55 to continue collecting.

[0044] The working principle of this utility model is as follows:

[0045] The first motor 20 is started to drive the first rotating rod 21 and cam 22 to rotate. The cam 22 presses against the two fixed wheels 18, causing the first screen plate 14 and the second screen plate 16 to slide up and down along the first limiting rod 13 and the second limiting rod 15, thus classifying and screening the talc powder poured into the box 10 from the feed hopper 33. During the screening process, the first sliding plate 29 and the second sliding plate 30 slide within the first limiting groove 27 and the second limiting groove 28, cooperating with the first spring 31 and the second spring 32 to assist the screen plates in stable reciprocating movement. The first shock-absorbing pad 2... 3. The second shock-absorbing pad 25 works together with the first limiting plate 24 and the second limiting plate 26 to reduce impact and limit the screen plate stroke. The screened material is pushed out from the first discharge hole 35 and the second discharge hole 36 by the first deflector plate 46 and the second deflector plate 49 respectively, and falls into the first collection box 52 on the first base 50 and the second collection box 53 on the second base 51. The material that meets the fine particle size requirements falls into the third collection box 55 through the third discharge hole 54, realizing efficient screening, automatic discharge and classified collection of materials of different specifications.

[0046] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. A powder screening device for producing talc powder, comprising a housing (10), characterized in that: Inside the housing (10), a first support plate (11) and a second support plate (12) are fixed from top to bottom at one end. First limiting rods (13) are fixed to both sides of the lower end of the first support plate (11). A first sieve plate (14) is slidably connected to the outer sides of the two first limiting rods (13). Second limiting rods (15) are fixed to both sides of the upper end of the second support plate (12). A second sieve plate (16) is slidably connected to the outer sides of the two second limiting rods (15). Support frames (17) are connected to the sides of the first sieve plate (14) and the second sieve plate (16) that are close to each other. The box (10) is fixed with a fixed wheel (18) inside. A load-bearing plate (19) is fixed on the outside of the box (10). A first motor (20) is fixed on the upper end of the load-bearing plate (19). A first rotating rod (21) is actively connected inside the box (10). One end of the first rotating rod (21) near the load-bearing plate (19) passes through the box (10) and extends to the outside of the box (10). One end of the first rotating rod (21) is fixedly connected to the output end of the first motor (20). A cam (22) is fixed on the outside of the first rotating rod (21). The cam (22) is located between the two fixed wheels (18).

2. The powder screening device for producing talc powder according to claim 1, characterized in that: A first damping pad (23) is fixed to the outside of the two first limiting rods (13) and at the lower end of the first screen plate (14). A first limiting plate (24) is fixed to the outside of the two first limiting rods (13) and at the lower end of the first damping pad (23). A second damping pad (25) is fixed to the outside of the two second limiting rods (15) and at the upper end of the second screen plate (16). A second limiting plate (26) is fixed to the outside of the two second limiting rods (15) and at the upper end of the second damping pad (25).

3. The powder screening device for producing talc powder according to claim 1, characterized in that: The box (10) has a first limiting groove (27) and a second limiting groove (28) sequentially opened from top to bottom at one end. The first screen plate (14) is fixed with a first sliding plate (29) on the side near the first limiting groove (27), and the first limiting groove (27) and the first sliding plate (29) are compatible. The second screen plate (16) is fixed with a second sliding plate (30) on the side near the second limiting groove (28), and the second limiting groove (28) and the second sliding plate (30) are compatible.

4. The powder screening device for producing talc powder according to claim 1, characterized in that: A first spring (31) is fixed at the lower end of the first support plate (11) and outside the two first limiting rods (13), and a second spring (32) is fixed at the upper end of the second support plate (12) and outside the two second limiting rods (15).

5. A powder screening device for producing talc powder according to claim 1, characterized in that: The upper end of the box (10) is provided with a feeding hopper (33), and a cover plate (34) is rotatably connected to one side of the feeding hopper (33).

6. The powder screening device for producing talc powder according to claim 1, characterized in that: The box body (10) has a first discharge hole (35) and a second discharge hole (36) sequentially opened from top to bottom at the end away from the first support plate (11). A protective cover (40) is fixed on the side of the box body (10) away from the load-bearing plate (19). A bottom plate (41) is fixed on the inner wall of the protective cover (40). A second motor (42) is fixed on the upper end of the bottom plate (41). A first gear (43) is fixed on the output end of the second motor (42). A second gear (44) is provided on the upper end of the first gear (43), and the first gear (43) and the second gear (44) are meshed. A second rotating rod (45) is fixed inside the second gear (44). One end of the second rotating rod (45) passes through the first discharge hole (35) and extends to... Inside the housing (10), the second rotating rod (45) is rotatably connected to the housing (10). A first feeding plate (46) is fixed on the outside of the second rotating rod (45) and inside the first discharge hole (35). A third gear (47) is provided at the lower end of the first gear (43). The first gear (43) and the third gear (47) are meshed. A third rotating rod (48) is fixed inside the third gear (47). One end of the third rotating rod (48) passes through the second discharge hole (36) and extends into the inside of the housing (10). The third rotating rod (48) is rotatably connected to the housing (10). A second feeding plate (49) is fixed on the outside of the third rotating rod (48) and inside the second discharge hole (36).

7. The powder screening device for producing talc powder according to claim 1, characterized in that: The box (10) has a first base (50) and a second base (51) fixed from top to bottom at one end near the first discharge hole (35). The first base (50) has a first collection box (52) at the upper end, and the second base (51) has a second collection box (53) at the upper end.

8. The powder screening device for producing talc powder according to claim 1, characterized in that: The lower end of the box (10) is provided with a third discharge hole (54), and a third collection box (55) is slidably connected inside the third discharge hole (54).

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