A precision valve processing metal powder spreading device and its usage method

Abstract

The present invention relates to a metal powder spreading device for precision valve processing, comprising: an outer housing with a processing space inside; a powder spreading table located at the bottom of the processing space, and a plurality of powder grooves are provided on the top of the powder spreading table; a powder spreading part, which includes a driving mechanism and a powder box installed on the top of the powder spreading table. By setting the powder spreading part, it can be used to evenly spread metal powder on the powder spreading table for processing. When spreading powder, the driving mechanism drives the powder box to move left and right on the powder spreading table, and the metal powder in the powder box is spread on the powder spreading table. When the metal powder in the powder box is used up, powder needs to be added. By moving the powder box into the internal of the feeding box, the metal powder inside the feeding box automatically falls into the internal of the powder box to add the metal powder inside the powder box, so that the powder box does not need to store a large amount of metal powder, preventing the metal powder from accumulating and caking, making the powder spreading more uniform. At the same time, the adding method is simple and convenient, greatly improving the powder spreading efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of metal powders, and in particular, to a metal powder spreading device for precision valve processing and a using method thereof. Background Art

[0002] Valves are mainly devices used to control the direction, pressure, and flow rate of fluids, and are devices that enable the medium in pipes and equipment to flow or stop and can control its flow rate. Since powder metallurgy is not restricted by melting, alloy components can be added, and other structural components can also be added, and can be adjusted within a relatively large range according to requirements, so that the mechanical properties can achieve the effect of matching the parts.

[0003] In Chinese Patent Application No. 201610126310.7, Publication No.: CN105728721A, there is disclosed a device for realizing uniform powder spreading for rapid prototyping of two powders, including a lifting workbench, a linear module fixedly connected to the lifting workbench, a powder pressing roller arranged on the slider of the linear module, a powder scraping plate, a powder supply box, a lifting table arranged in the forming cylinder of the workbench, and a heating device arranged on the lifting table. The powder supply box is divided into a plurality of chambers with the same volume by arranging baffles, and a switch for controlling the falling of powder is arranged at the powder outlet of each chamber. Moreover, a powder supply shaft with a gear-shaped cross-section is arranged at the powder outlet of the powder supply box, and the powder supply shaft is tangent to the wedge-shaped edge of the powder outlet of the powder supply box, realizing rapid prototyping of any ratio of two powders for each two-dimensional graphic of each layer, enabling each layer of the formed part to have a gradient difference, and thus reducing the time wasted due to only one type of powder being used in a single cycle. This device can make the powder affected by the high-energy beam flow uniformly heated, detect the temperature field, and control the interlayer temperature, thereby reducing the residual stress caused by uneven temperature.

[0004] This kind of powder spreading device can make the powder affected by the high-energy beam flow uniformly heated, detect the temperature field, and control the interlayer temperature, thereby reducing the residual stress caused by uneven temperature. However, this kind of powder spreading device for metal powders is inconvenient for automatically feeding the metal powders, affecting the powder spreading efficiency. Moreover, conventional feeding devices are prone to causing the metal powders to accumulate and agglomerate, blocking the feeding port. At the same time, it is inconvenient to recycle the metal powders. Therefore, a metal powder spreading device for precision valve processing and a using method thereof are designed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a metal powder spreading device for precision valve processing and a using method thereof.

[0006] To solve the above technical problems, the present invention provides a precision valve processing metal powder spreading device, comprising: an outer casing, the interior of the outer casing having a processing space; a spreading table located at the bottom of the processing space, the top of the spreading table being provided with a plurality of powder grooves; a spreading part, the spreading part comprising a driving mechanism and a powder box installed on the top of the spreading table, the top of the powder box being provided with a powder inlet, both sides of the powder inlet being provided with first baffles, the bottom of the powder box being provided with a powder outlet, the first baffles being semi-circular in shape, a storage groove being provided inside the first baffles and the powder box, a telescopic rod being installed inside the storage groove, a first spring being installed at the top of the telescopic rod, a sealing cover being installed at the top of the first spring, the driving mechanism being used to drive the powder box to move left and right along the spreading table to spread the powder into the powder grooves; a feeding part, the feeding part being located on both sides of the outer casing, the feeding part comprising a feeding box and a storage tank installed at the inner top of the feeding box; wherein after the driving mechanism drives the powder box to insert into the feeding box, the powder inside the storage tank automatically falls into the powder box.

[0007] Further, a plurality of tooth grooves are fixed on the top of the powder box, both ends of the tooth grooves are open, tooth teeth are provided on the inner side wall of the tooth grooves, and a strip groove is provided at the bottom of the tooth grooves.

[0008] Further, one side of the feeding box is provided with an opening; a first storage plate is installed inside the storage tank, a second storage plate is installed on the top of the first storage plate, a plurality of discharge holes are provided on the tops of the first storage plate and the second storage plate, a plurality of groups of rotating rods are installed inside the storage tank, gears are fixed at the bottoms of the rotating rods, fan blades are fixed on the surfaces of the rotating rods, and the diameter of the fan blades is larger than the diameter of the discharge holes; wherein in the initial position, a plurality of groups of the fan blades are on the same horizontal line and block the discharge holes; after the powder box is inserted into the feeding box through the opening, the gears drive the fan blades to rotate.

[0009] Further, a sealing groove is provided on one side of the powder outlet, a sealing rod is installed inside the sealing groove, a second spring is fixed between the sealing rod and the bottom of the sealing groove, the sealing rod is L-shaped, and the end of the sealing rod is inserted into the strip groove; wherein as the gear moves along the tooth groove, the sealing rod is pushed to block the powder outlet.

[0010] Further, the driving mechanism comprises sliders and a lead screw slidably installed on both sides of the spreading table, a moving block is provided on one side of the slider, the lead screw passes through the moving block, a first motor is installed at one end of the lead screw, the first motor is fixed on the side wall of the feeding box, a connecting rod is fixed between adjacent sliders, both ends of the powder box are hinged with hinge rods, and the other ends of the hinge rods are hinged on the sliders.

[0011] Further, second baffles are arranged at both ends of the powder spreading table, the slider is clamped on the second baffles, and inclined plates are arranged on both sides of the powder spreading table.

[0012] Further, a powder containing cavity is installed at the bottom of the powder tank, a lifting plate is installed inside the powder containing cavity, a threaded rod is fixed to the bottom of the lifting plate, a pulley is installed on the surface of the screw rod, a belt is installed on the surface of the pulley, and a motor is installed on one side of the belt.

[0013] Further, a recycling box is installed at the bottom of the feeding box, and rollers are installed at the bottom of the recycling box.

[0014] The present invention also provides a usage method of a metal powder spreading device for precision valve processing, including the following steps:

[0015] S1: Start the first motor to drive the screw rod to rotate, and the screw rod drives the powder box to move into the feeding box;

[0016] S2: When the powder box moves into the feeding box, the gear moves along the tooth groove, the gear drives the rotating rod and the fan blade to rotate, the metal powder falls layer by layer through the discharge hole and drops into the powder box. At the same time, the gear pushes the sealing rod to move to one side, and the bottom of the sealing rod blocks the powder outlet;

[0017] S3: The screw rod rotates in the reverse direction, the powder spreading table squeezes the telescopic rod to move upward to close the powder outlet at the top, and the powder box moves on the powder spreading table for powder spreading.

[0018] The beneficial effect of the present invention is that a metal powder spreading device and a usage method for precision valve processing of the present invention can be used to evenly spread metal powder on the powder spreading table for processing. When spreading powder, the driving mechanism drives the powder box to move left and right on the powder spreading table, and spreads the metal powder in the powder box on the powder spreading table. When the metal powder in the powder box is used up and needs to be refilled, by moving the powder box into the feeding box, the metal powder inside the feeding box automatically falls into the powder box to add the metal powder inside the powder box, so that there is no need to store a large amount of metal powder in the powder box, preventing the metal powder from accumulating and caking, making the powder spreading more uniform. At the same time, the adding method is simple and convenient, greatly improving the powder spreading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 is a perspective view of a preferred embodiment of the present invention;

[0021] Figure 2 is a perspective view of a preferred embodiment of the powder spreading table of the present invention;

[0022] Figure 3 It is a front view of a preferred embodiment of a powder spreading table of the present invention;

[0023] Figure 4 It is a schematic diagram of the front cross-sectional structure of a preferred embodiment of the feeding part of the present invention;

[0024] Figure 5 The present invention Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0025] Figure 6 is a three-dimensional diagram of a preferred embodiment of a powder box of the present invention;

[0026] Figure 7 is a top view of a preferred embodiment of a powder box of the present invention;

[0027] Figure 8 is a schematic diagram of a front cross-sectional structure of a preferred embodiment of a powder box of the present invention;

[0028] Figure 9 The present invention Figure 8 A schematic diagram of the partially enlarged structure at B in the middle;

[0029] Figure 10 is a three-dimensional diagram of the gear of the present invention when it moves inside the tooth groove;

[0030] Figure 11 is a top view of a preferred embodiment of the present invention when the fan blades are rotating;

[0031] Figure 12 It is a top view of the preferred embodiment of the present invention in the initial position.

[0032] In the figure:

[0033] 1. Outer shell;

[0034] 2. Powder spreading table; 21. Powder trough; 22. Second baffle plate; 23. Inclined plate; 24. Powder holding chamber; 25. Lifting plate; 26. Threaded rod; 27. Pulley; 28. Wheel belt; 29. ​​Second motor;

[0035] 3. Powder spreading part; 31. Driving mechanism; 311. Sliding block; 312. Screw rod; 313. Moving block; 314. First motor; 315. Connecting rod; 316. Articulated rod; 32. Powder box; 321. Sealing cover; 322. First baffle; 323. Powder outlet; 324. Storage slot; 325. Telescopic rod; 326. First spring; 33. Powder inlet; 34. Tooth groove; 341. Tooth; 342. Strip groove; 35. Sealed groove; 351. Sealed rod; 352. Second spring;

[0036] 4. Feeding section; 41. Feeding box; 42. Storage tank; 421. First storage plate; 422. Second storage plate; 423. Discharge hole; 424. Rotating rod; 425. Gear; 426. Fan blade; 43. Opening

[0037] 5. Recycling box; 51. Roller Detailed implementation mode

[0038] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention

[0039] As Figure 1-12 shown, a metal powder spreading device for precision valve processing according to the present invention includes: a housing 1 with a processing space inside; a powder spreading table 2 located at the bottom of the processing space, and a plurality of powder grooves 21 are provided on the top of the powder spreading table 2

[0040] The processing space is provided inside the housing 1 for processing metal powder. The powder groove 21 is circularly arranged. By continuously spreading the metal powder in the powder groove 21 on the powder spreading table 2, the metal powder is processed and formed in the powder groove 21

[0041] A powder spreading section 3, the powder spreading section 3 includes a driving mechanism 31 and a powder box 32 installed on the top of the powder spreading table 2. The driving mechanism 31 is used to drive the powder box 32 to move left and right along the powder spreading table 2 to spread the powder in the powder groove 21; a feeding section 4, the feeding section 4 is located on both sides of the housing 1, and the feeding section 4 includes a feeding box 41 and a storage tank 42 installed on the inner top of the feeding box 41; wherein after the driving mechanism 31 drives the powder box 32 to insert into the inside of the feeding box 41, the powder in the storage tank 42 automatically falls into the powder box 32

[0042] By setting the powder spreading section 3, it can be used to evenly spread the metal powder on the powder spreading table 2 for processing. When spreading the powder, the driving mechanism 31 drives the powder box 32 to move left and right on the powder spreading table 2, and spreads the metal powder in the powder box 32 on the powder spreading table 2. When the metal powder in the powder box 32 is used up, powder needs to be added. By moving the powder box 32 into the inside of the feeding box 41, the metal powder inside the feeding box 41 automatically falls into the inside of the powder box 32, adding the metal powder inside the powder box 32, so that less metal powder needs to be stored in the powder box 32, preventing the metal powder from accumulating and caking, making the powder spreading more uniform. At the same time, the adding method is simple and convenient, greatly improving the powder spreading efficiency

[0043] The top of the powder cartridge 32 is provided with a powder inlet 33. On both sides of the powder inlet 33, there are first baffles 322. The bottom of the powder cartridge 32 is provided with a powder outlet 323. The first baffle 322 is semi-circular in shape. Inside the first baffle 322 and the powder cartridge 32, there is a storage groove 324. Inside the storage groove 324, there is a telescopic rod 325 installed. At the top of the telescopic rod 325, there is a first spring 326 installed. At the top of the first spring 326, there is a sealing cover 321 installed.

[0044] The powder cartridge 32 is overall rectangular in shape and is hollow inside, which can be used to hold metal powder. The top is provided with a long strip-shaped powder inlet 33. Through the powder inlet 33, metal powder can be filled into the powder cartridge 32. The bottom of the powder cartridge 32 is provided with a powder outlet 323. The metal powder is discharged to the powder spreading table 2 through the powder outlet 323. The first baffle 322 is semi-circular in shape. The internally provided storage groove 324 is used to store the sealing cover 321. One end of the storage groove 324 communicates with the powder inlet 33, and the other end extends to the bottom of the powder cartridge 32, so that the bottom of the internal telescopic rod 325 can extend outside the powder cartridge 32. The telescopic rod 325 can move up and down inside the storage groove 324 and cooperate with the edges on the side wall and the edges on the sealing groove, so that it will not fall from the bottom of the powder cartridge 32 when moving up and down. When the telescopic rod 325 moves upward, it squeezes the first spring 326, and the first spring 326 simultaneously squeezes the sealing cover 321 at the top, so that the end of the sealing cover 321 protrudes from the powder outlet 323 and seals the powder outlet 323.

[0045] Several tooth grooves 34 are fixed on the top of the powder cartridge 32. Both ends of the tooth groove 34 are provided with openings 43. On the inner side wall of the tooth groove 34, there are tooth teeth 341. A strip groove 342 is opened at the bottom of the tooth groove 34. One side of the feeding box 41 is provided with an opening 43; inside the storage tank 42, there is a first storage plate 421 installed. At the top of the first storage plate 421, there is a second storage plate 422 installed. Several discharge holes 423 are opened at the top of the first storage plate 421 and the second storage plate 422. Inside the storage tank 42, several groups of rotating rods 424 are installed. At the bottom of the rotating rod 424, there is a gear 425 fixed. On the surface of the rotating rod 424, there is a fan blade 426 fixed. The diameter of the fan blade 426 is larger than the diameter of the discharge hole 423; initially, several groups of fan blades 426 are located on the same horizontal line and block the discharge holes 423; after the powder cartridge 32 is inserted into the feeding box 41 through the opening 43, the gear 425 drives the fan blade 426 to rotate.

[0046] Three groups of tooth grooves 34 are located at the top of the first baffle 322, and the bottom part is embedded in the first baffle 322. Corresponding notches are provided on the sealing covers 321, but it does not affect the two sealing covers 321 to block the powder outlet 323. At the same time, the height of the first baffle 322 can be reduced. A strip groove 342 is provided at the bottom of the tooth groove 34, and the top and bottom of the strip groove 342 are open at 43. Metal powder can fall into the powder box 32 through the strip groove 342. The whole material storage box is in the shape of a cuboid, with the notch facing downwards and the notch being funnel-shaped, so that the powder can be discharged better. And it is located at the inner top of the feeding box 41. The first material storage plate 421 inside it is located at the bottom of the second material storage plate 422. Three rotating rods 424 penetrate through the first material storage plate 421 and the second material storage plate 422, and the bottom of the rotating rod 424 protrudes to the notch of the discharge chute. When the rotating rod 424 rotates, the rotating rod 424 drives the fan blade 426 to rotate, stirring the inside of the discharge chute, so as to prevent the metal powder on the first material storage plate 421 and the second material storage plate 422 from accumulating and caking over time, blocking the discharge hole 423 and affecting the processing.

[0047] When adding powder to the powder box 32, the powder box 32 is inserted into the inside of the feeding box 41 from the opening 43. When the powder box 32 moves into the inside of the feeding box 41, the gear 425 at the top will be inserted into the tooth groove 34 and move along the tooth groove 34. At this time, the rotating rod 424 rotates to drive the fan blade 426 to stir the metal powder inside the material storage box, so as to prevent the metal powder from accumulating and caking. When the fan blade 426 rotates, the discharge hole 423 at the bottom is opened, and the metal powder falls layer by layer through the discharge hole 423 and drops into the powder box 32, so that the metal powder can be automatically added.

[0048] A sealed groove 35 is provided on one side of the powder outlet 323. A sealed rod 351 is installed inside the sealed groove 35. A second spring 352 is fixed between the sealed rod 351 and the bottom of the sealed groove 35. The sealed rod 351 is in an L shape, and the end of the sealed rod 351 is inserted into the strip groove 342; among them, the gear 425 moves along the tooth groove 34, pushing the sealed rod 351 to block the powder outlet 323.

[0049] By setting that the sealing rod 351 can be used to seal the powder outlet 323 to prevent the internal metal powder from falling off when adding metal powder. When the bottom of the sealing rod 351 moves away from the bottom of the groove in the sealing groove 35, the powder outlet 323 can be blocked and no powder will come out. When the powder box 32 is moved into the feeding box 41 to add powder, the gear 425 at the sealed bottom of the powder outlet 323 moves along the tooth groove 34. At this time, the gear 425 pushes the sealing rod 351 to move to one side, and the bottom of the sealing rod 351 blocks the powder outlet 323, so that the metal powder will not be discharged through the powder outlet 323 during feeding. At the same time, the telescopic rod 325 and the top sealing cover 321 move downward to reset, the powder inlet 33 opens, and the metal powder at the top falls from the bottom of the storage box into the powder box 32 for rapid automatic feeding.

[0050] The driving mechanism 31 includes sliders 311 and lead screws 312 slidably installed on both sides of the powder spreading table 2. A moving block 313 is arranged on one side of the slider 311, the lead screw 312 penetrates through the moving block 313, one end of the lead screw 312 is equipped with a first motor 314, the first motor 314 is fixed on the side wall of the feeding box 41, a connecting rod 315 is fixed between adjacent sliders 311, both ends of the powder box 32 are hinged with hinge rods 316, and the other ends of the hinge rods 316 are hinged on the sliders 311. Second baffles 22 are arranged at both ends of the powder spreading table 2, and the sliders 311 are clamped on the second baffles 22. Inclined plates 23 are arranged on both sides of the powder spreading table 2, a recovery box 5 is installed at the bottom of the feeding box 41, and rollers 51 are installed at the bottom of the recovery box 5.

[0051] The lead screw 312 is located on both sides of the powder spreading table 2, and a first motor 314 is installed at one end of the lead screw 312. The lead screw 312 is driven by the first motor 314 to rotate. When the lead screw 312 rotates, the moving block 313 moves left and right on the lead screw 312, and then the moving block 313 drives the slider 311 to move left and right along the second baffle 22. At the same time, the second baffle 22 can block the metal powder on the powder spreading table 2. While the slider 311 moves, the powder box 32 moves left and right following the slider 311 to realize powder spreading on the powder spreading table 2, and the distance between the bottom of the powder box 32 and the powder spreading table 2 can be controlled by adjusting the inclination of the hinge rod 316, thereby achieving the adjustment of the powder output. At the same time, when it is necessary to clean the metal powder on the powder spreading table 2, the powder box 32 is moved to a position close to the top of the powder spreading table 2, and the metal powder on the powder spreading table 2 is pushed into the recovery box 5 through the inclined plate 23 by the powder box 32 for recovery. At the same time, the inclined plate 23 can be used to guide the telescopic rod 325 to prevent the telescopic rod 325 from getting stuck inside the feeding box 41. When the powder box 32 is moved out of the feeding box 41 for powder spreading, the telescopic rod 325 can move along the inclined plate 23 to the powder spreading table 2, and the powder spreading table 2 squeezes the telescopic rod 325 to move upward to close the powder outlet 323 at the top, preventing particulate matter from entering the powder box 32 during powder adding.

[0052] A powder storage cavity 24 is installed at the bottom of the powder trough 21. A lifting plate 25 is installed inside the powder storage cavity 24. A threaded rod 26 is fixed to the bottom of the lifting plate 25. A pulley 27 is installed on the surface of the lead screw 312. The pulley 27 is threadedly connected to the threaded rod 26. A belt 28 is installed on the surface of the pulley 27. A second motor 29 is installed on one side of the belt 28.

[0053] The lifting plate 25 can be lifted inside the powder storage cavity 24 to process the metal powder at the top. When the lifting plate 25 needs to be lifted or lowered, by starting the second motor 29, the second motor 29 drives the belt 28 to rotate. The belt 28 drives the pulley 27 to rotate. The pulley 27 drives the threaded rod 26 and the lifting plate 25 to rise or fall to process the metal powder.

[0054] The present invention also provides a method for using a metal powder spreading device for precision valve processing, including the following steps:

[0055] S1: Start the first motor 314 to drive the lead screw 312 to rotate, and the lead screw 312 drives the powder box 32 to move into the feeding box 41.

[0056] S2: When the powder box 32 moves inside the feeding box 41, the gear 425 moves along the tooth groove 34. The gear 425 drives the rotating rod 424 and the fan blade 426 to rotate. The metal powder falls layer by layer through the discharge hole 423 and drops into the powder box 32. At the same time, the gear 425 pushes the sealing rod 351 to move to one side, and the bottom of the sealing rod 351 blocks the powder outlet 323.

[0057] S3: The lead screw 312 rotates in the reverse direction. The spreading table 2 squeezes the telescopic rod 325 to move upward to close the powder outlet 323 at the top, and the powder box 32 moves to spread powder on the spreading table 2.

[0058] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A metal powder spreading device for precision valve processing, characterized in that Comprising: An outer housing (1), the interior of which has a processing space; A powder spreading table (2), which is located at the bottom of the processing space, and a plurality of powder grooves (21) are arranged on the top of the powder spreading table (2); A powder spreading part (3), the powder spreading part (3) includes a driving mechanism (31) and a powder box (32) installed on the top of the powder spreading table (2), a powder inlet (33) is opened on the top of the powder box (32), first baffles (322) are arranged on both sides of the powder inlet (33), a powder outlet (323) is arranged at the bottom of the powder box (32), a storage groove (324) is opened inside the first baffle (322) and the powder box (32), a telescopic rod (325) is installed inside the storage groove (324), a first spring (326) is installed at the top of the telescopic rod (325), a sealing cover (321) is installed at the top of the first spring (326), and the driving mechanism (31) is used to drive the powder box (32) to move left and right along the powder spreading table (2) to spread powder into the powder grooves (21); A feeding part (4), the feeding part (4) is located on both sides of the outer housing (1), and the feeding part (4) includes a feeding box (41) and a storage tank (42) installed at the inner top of the feeding box (41); Wherein after the driving mechanism (31) drives the powder box (32) to insert into the feeding box (41), the powder inside the storage tank (42) automatically falls into the powder box (32); a plurality of tooth grooves (34) are fixed on the top of the powder box (32), both ends of the tooth grooves (34) are provided with openings (43), tooth teeth (341) are arranged on the inner side wall of the tooth grooves (34), and a strip groove (342) is opened at the bottom of the tooth grooves (34); An opening (43) is arranged on one side of the feeding box (41); A first storage plate (421) is installed inside the storage tank (42), a second storage plate (422) is installed on the top of the first storage plate (421), a plurality of discharge holes (423) are opened on the top of the first storage plate (421) and the second storage plate (422), a plurality of groups of rotating rods (424) are installed inside the storage tank (42), a gear (425) is fixed at the bottom of the rotating rod (424), a fan blade (426) is fixed on the surface of the rotating rod (424), and the diameter of the fan blade (426) is larger than the diameter of the discharge hole (423); Wherein in the initial position, a plurality of groups of the fan blades (426) are located on the same horizontal line and block the discharge holes (423); After the powder box (32) is inserted into the feeding box (41) through the opening (43), the gear (425) drives the fan blade (426) to rotate; One side of the powder outlet (323) is provided with a sealing groove (35). A sealing rod (351) is installed inside the sealing groove (35). A second spring (352) is fixed between the sealing rod (351) and the bottom of the sealing groove (35). The sealing rod (351) is L-shaped, and the end of the sealing rod (351) is inserted into the strip groove (342). The gear (425) moves along the tooth groove (34) to push the sealing rod (351) to block the powder outlet (323).

2. The precision valve processing metal powder spreading device according to claim 1, wherein The driving mechanism (31) includes sliders (311) and lead screws (312) slidably installed on both sides of the spreading table (2). A moving block (313) is arranged on one side of the slider (311). The lead screw (312) passes through the moving block (313). One end of the lead screw (312) is equipped with a first motor (314). The first motor (314) is fixed on the side wall of the feeding box (41). A connecting rod (315) is fixed between adjacent sliders (311). Both ends of the powder box (32) are hinged with hinge rods (316), and the other ends of the hinge rods (316) are hinged on the sliders (311).

3. The precision valve processing metal powder spreading device according to claim 2, wherein Both ends of the spreading table (2) are provided with second baffles (22). The sliders (311) are clamped on the second baffles (22). Inclined plates (23) are arranged on both sides of the spreading table (2).

4. The precision valve processing metal powder spreading device according to claim 3, wherein A powder containing cavity (24) is installed at the bottom of the powder groove (21). A lifting plate (25) is installed inside the powder containing cavity (24). A threaded rod (26) is fixed to the bottom of the lifting plate (25). A pulley (27) is installed on the surface of the lead screw (312). A belt (28) is installed on the surface of the pulley (27). A motor is installed on one side of the belt (28).

5. The precision valve processing metal powder spreading device according to claim 4, wherein A recycling box (5) is installed at the bottom of the feeding box (41). Rollers (51) are installed at the bottom of the recycling box (5).

6. A method for using the precision valve processing metal powder spreading device according to claim 5, comprising the following steps: S1: Start the first motor (314) to drive the lead screw (312) to rotate. The lead screw (312) drives the powder box (32) to move into the feeding box (41). S2: When the powder box (32) moves into the feeding box (41), the gear (425) moves along the tooth groove (34). The gear (425) drives the rotating rod (424) and the fan blade (426) to rotate. The metal powder falls layer by layer through the powder outlet hole (423) and drops into the powder box (32). At the same time, the gear (425) pushes the sealing rod (351) to move to one side, and the bottom of the sealing rod (351) blocks the powder outlet (323). S3: The lead screw (312) rotates in the reverse direction. The powder spreading table (2) squeezes the telescopic rod (325) to move upward to close the powder outlet (323) at the top. The powder box (32) moves to spread powder on the powder spreading table (2).

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