Powder falling and scraping structure suitable for double-laser printing equipment

Abstract

The embodiment of the invention provides a powder falling and scraping structure suitable for double-laser printing equipment, and relates to the technical field of double-laser printing equipment. According to the powder falling and scraping structure suitable for the double-laser printing equipment, a powder falling bin, a powder bin and a printing bin are sequentially and transversely distributed on the upper surface of a printing table, a powder falling plate capable of moving up and down is arranged in the powder falling bin, and a powder feeding plate capable of moving up and down is arranged in the powder bin; a printing bottom plate capable of moving up and down is arranged in the printing bin, a first rotating shaft penetrates through a partition plate between the powder bin and the powder falling bin, a sixth gear and a fifth gear drive a third rack and a second rack arranged on the bottom face of a powder falling plate and the bottom face of a powder feeding plate respectively, and a second motor drives a reciprocating lead screw through a second gear to enable a moving rod to move. And through linkage of a fourth gear, a pawl and a first ratchet wheel, a seventh gear drives a first rotating shaft to rotate, finally, a powder falling plate descends, and a powder feeding plate ascends. The series of actions ensure that one-time effective powder laying can be completed every time the scraper moves back and forth, and continuous printing is supported.

Description

Technical Field

[0001] The invention belongs to the technical field of dual laser printing equipment, and in particular relates to a powder dropping and scraping structure suitable for dual laser printing equipment. Background Art

[0002] With the development of additive manufacturing (3D printing) technology, metal 3D printing, as an important branch, has demonstrated its unique advantages in aerospace, automobile manufacturing, medical implants and other fields. Metal 3D printing forms a three-dimensional entity by stacking materials layer by layer, which can achieve complex structural designs that are difficult to complete with traditional manufacturing processes. In this process, powder bed fusion is a common technology for metal 3D printing, which relies on high-precision powder laying and leveling to ensure that each layer can be accurately formed.

[0003] In the prior art (publication number CN113524669B, patent name is a patent application for a powder dropping and scraping structure suitable for dual laser printing equipment), it includes a support frame, a power mechanism is fixed on the support frame, a material storage box and a printing box are arranged on the upper end of the power mechanism, a material receiving box is arranged on the left side of the material storage box, a stabilizing plate is fixed on the upper end of the material receiving box, and a transmission mechanism is fixed on the left side of the upper end surface of the stabilizing plate; a feeding mechanism is arranged on the right side of the transmission mechanism; a scraping box is arranged on the right side of the feeding mechanism, and a stirring mechanism is arranged in the scraping box. In the process of implementing this technical solution, it is found that there are at least the following problems in the prior art: In the above-mentioned metal 3D printing equipment, the scraper arm, a key component responsible for pushing the powder from the feeding area to the printing area and smoothing the powder surface, has certain limitations. Traditionally, after the scraper arm completes a pushing action, it must return to the starting position to reload the powder before the next round of tiling can be carried out. This one-way movement working mode not only limits the printing speed, but also increases the non-productive time of the entire printing process. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems in the prior art that the scraper arm cannot scrape powder back and forth. To this end, the present application proposes a powder dropping and scraping structure suitable for a dual laser printing device.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the present invention is as follows: a powder dropping and scraping structure suitable for dual laser printing equipment, comprising a printing table and a movable arm relatively arranged above the printing table, wherein a powder dropping bin, a powder material bin and a printing bin are sequentially and laterally distributed on the upper surface of the printing table, a powder dropping plate capable of being moved up and down is provided inside the powder dropping bin, a powder upper plate capable of being moved up and down is provided inside the powder material bin, a printing base plate capable of being moved up and down is provided inside the printing bin, a rotating shaft 1 passes through the partition between the powder material bin and the powder dropping bin, and gear 6 and gear 5 are respectively fixed at both ends of the rotating shaft 1, gear 6 and gear 5 respectively drive rack 3 and rack 2 provided on the bottom surfaces of the powder dropping plate and the upper powder plate, and a scraper for scraping powder is provided inside the rotating cavity opened on the bottom surface of the movable arm.

[0006] Preferably, a moving block is fixed to one end of one side of the moving arm, a threaded rod is threadedly penetrated from one side of the surface of the moving block, and a motor located at the end of the threaded rod drives it to rotate, a bracket is fixed to one side of the bottom surface of the moving arm, a rotatable reciprocating screw is provided between the two brackets, and a gear three is also fixed to one end of the reciprocating screw.

[0007] Preferably, the gear three meshes and drives the gear two connected above, and a worm is also connected to one side of the surface of the gear two, and the other end of the worm is connected to the motor two, and a limiting column is fixed between the two brackets above the reciprocating screw.

[0008] Preferably, one end of the reciprocating screw passes through the top of the moving rod, and a rotating shaft 2 is passed through one side of the powder dropping bin surface. The rotating shaft 2 extends in the direction of the gear 5, and a gear 7 is fixed to one end of the rotating shaft 2 near the gear 5. The gear 7 is meshed and connected with a crown gear provided on one side of the surface of the gear 5.

[0009] Preferably, a ratchet wheel 1 is fixed to one end of the rotating shaft 2 of the moving rod, and a rotatable gear wheel 4 is sleeved on the outer circumference of the ratchet wheel 1, and the gear wheel 4 is meshed with a rack wheel 1 fixedly connected to the lower part of the moving rod.

[0010] Preferably, a pawl is provided at the hollow inner ring wall of the gear four, one end of the pawl is snap-fitted with the outer peripheral surface of the ratchet, and a spring is connected between the upper surface of the pawl and the hollow inner wall of the gear four.

[0011] Preferably, a ratchet wheel 2 is fixed to one side of the outer circumference of the rotating shaft 2, and a limiting member provided on one side of the ratchet wheel 2 limits the rotating shaft 2 from rotating, and an electric push rod is fixedly connected to one end of the limiting member.

[0012] Preferably, a worm wheel extends to one side from the central axis of the scraper, and the worm wheel is meshed with the worm. A movable plate that can be displaced along the length direction of the scraper is provided on the lower side of the movable arm, and brushes are distributed on the surface of the movable plate opposite to the scraper.

[0013] Preferably, gear one is meshed above gear two, a rotating disk is fixed on the surface of gear one toward the inside of the movable arm, and an eccentric column is fixed away from the center of the rotating disk.

[0014] Preferably, a moving box is extended from the moving plate toward the rotating disk, a limiting groove is provided on the surface of the moving box that is in contact with the surface of the rotating disk, and one end of the eccentric column extends into the limiting groove.

[0015] The powder dropping and scraping structure of the present invention applicable to dual laser printing equipment has the following advantages: 1. This is a powder dropping and scraping structure suitable for dual laser printing equipment. In metal powder laser printing, motor 1 is started to rotate the threaded rod, driving the moving arm and scraper to push the powder on the upper powder plate evenly to the top of the printing base plate. Excess powder is pushed to the powder bin and falls into the powder dropping bin. Subsequently, motor 2 drives the reciprocating screw through gear 2 to move the moving rod, and then gear 7 drives the rotating shaft 1 to rotate through the linkage of gear 4, pawl and ratchet 1, and finally the powder dropping plate is lowered and the upper powder plate is raised. This series of actions ensures that an effective powder laying can be completed every time the scraper moves back and forth, supporting continuous printing.

[0016] 2. This is a powder dropping and scraping structure suitable for dual laser printing equipment. After completing the scraping of the powder on one side, in order to clean the residual powder on the scraper surface, the second motor rotates the scraper 180 degrees through the worm and worm gear, and the brush contacts and removes the residual powder. Gear 2 drives gear 1, and the eccentric column pushes the moving box to move the moving plate back and forth along the length of the scraper, ensuring that the brush thoroughly cleans the entire scraper surface and ensures the quality and thickness consistency of the next powder laying.

[0017] 3. This is a powder dropping and scraping structure suitable for dual laser printing equipment. When the scraper rotates and is cleaned by the brush, the fan starts and removes the removed powder through the dust suction pipe to prevent secondary flying and pollution. The connection plate under the fan shaft drives the filter cotton to rotate through magnetic coupling to ensure that the dust is evenly distributed and extend the service life of the filter cotton. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the frame explosion structure of the present invention; Figure 3 The printing station structure of the present invention is schematically shown in FIG. Figure 1 ; Figure 4 The printing station structure of the present invention is schematically shown in FIG. Figure 2 ; Figure 5 It is a schematic diagram of the structure of the movable arm of the present invention; Figure 6 It is a schematic diagram of the explosion structure of the movable arm of the present invention; Figure 7 It is a schematic diagram of the powder dropping plate structure of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram at A in the middle; Fig. 9 It is a structural schematic diagram of the second rotating shaft of the present invention; Fig.10 For the present invention Fig. 9 The enlarged structural diagram at B in the middle; Fig.11 It is a schematic diagram of the top view of the printing platform of the present invention; Fig.12 For the present invention Fig.11 Schematic diagram of the AA section structure; Fig.13 It is a schematic diagram of the structure of the movable arm of the present invention when viewed from above; Fig.14 The movable arm of the present invention is a schematic diagram of the explosion structure when viewed from above Figure 1 ; Fig.15 The movable arm of the present invention is a schematic diagram of the explosion structure when viewed from above Figure 2 ; Fig.16 It is a schematic diagram of the structure of the movable arm of the present invention from a top view; Fig.17 For the present invention Fig.16 Schematic diagram of the structure of the middle BB section; Fig.18 For the present invention Fig.17 Enlarged structural diagram at point C in the middle.

[0020] Explanation of the marks in the figure: 1. Frame; 11. Sealed door; 12. Moving mechanism; 13. Dual laser print heads; 2. Printing table; 21. Printing bin; 211. Printing base plate; 22. Powder bin; 221. Powder loading plate; 222. Rack three; 23. Powder dropping bin; 231. Powder dropping plate; 232. Lifting cylinder; 233. Rack two; 24. Rotating shaft one; 241. Gear five; 242. Crown gear; 243. Gear six; 3. Moving arm; 31. Moving block; 32. Scraper; 321. Worm gear; 33. Gear one; 331. Rotating disk; 332. Eccentric column; 34. Gear two; 341. Worm; 342. Motor two; 35. Gear three; 351. Reciprocating screw; 36. Moving rod; 361. Rack 1; 37. Bracket; 371. Limiting column; 38. Adsorption hole 2; 381. Adsorption chamber; 39. Rotating chamber; 4. Motor 1; 41. Threaded rod; 5. Dust box; 51. Dust pipe; 52. Fan; 521. Double-axis motor; 522. Rotating shaft; 53. Filter chamber; 531. Filter cotton; 532. Connecting rod; 533. Connecting plate; 534. Connecting sleeve; 6. Gear 4; 61. Rotating shaft 2; 611. Ratchet 1; 612. Gear 7; 613. Ratchet 2; 614. Limiting piece; 615. Electric push rod; 62. Ratchet; 63. Spring; 7. Moving plate; 71. Brush; 72. Adsorption hole 1; 73. Moving box; 731. Limiting groove; 732. Guide column. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1-Figure 3 As shown, a powder dropping and scraping structure suitable for a dual laser printing device of the present invention is provided. The dual laser printing device comprises a frame 1 and a sealing door 11 for sealing an opening on the surface of the frame 1. A dual laser printing head 13 for laser printing metal is arranged inside the frame 1. Metal 3D printing can be achieved through the dual laser printing head 13. The displacement operation of the dual laser printing head 13 is driven by a moving mechanism 12 provided on the dual laser printing head 13. After the moving mechanism 12 is running, the dual laser printing head 13 can be moved and printed on a suitable plane.

[0023] A printing platform 2 is fixed below the opposite side of the dual laser print heads 13. A powder drop bin 23, a powder bin 22 and a printing bin 21 are arranged horizontally from the upper surface of the printing platform 2. The powder bin 22 and the powder drop bin 23 are arranged symmetrically on the other side with the printing bin 21 as the center. A movable arm 3 capable of displacement is arranged above the printing platform 2. The movable arm 3 can push the powder to the top of the printing bin 21 for printing by the dual laser print heads 13. The powder bin 22 is used to store the powder required for printing. The powder drop bin 23 is used to collect excess powder. The printing bin 21 is the main working area for laser printing and is located at the center of the powder flow path.

[0024] like Figure 4-Figure 5 As shown, a moving block 31 is fixed to one end of the moving arm 3, and a threaded rod 41 is threadedly penetrated from one side of the surface of the moving block 31. The threaded rod 41 is threadedly connected to the penetration, and the motor 4 at the end of the threaded rod 41 drives it to rotate. As the motor 4 runs forward and reverse, the threaded rod 41 can be rotated, and after the threaded rod 41 rotates, the moving arm 3 can be driven to move back and forth. The movement of the moving arm 3 is started by the motor 4 and moves along the guide rail at a set speed. When it moves to the target position, it stops running through the limit sensor signal.

[0025] like Figure 5-Figure 9 As shown, a powder dropping plate 231, a powder upper plate 221 and a printing base plate 211 that can be displaced are respectively arranged inside the powder dropping bin 23, the powder bin 22 and the printing bin 21. When metal printing is required, the powder is spread flat on the top of the printing base plate 211, and then laser printing is performed by the dual laser print head 13. After the printing is completed, after the movable arm 3 moves, the powder on the powder upper plate 221 can be pushed to the top of the printing base plate 211, and the excess powder can fall to the top of the powder dropping plate 231. At the same time, the bottom of the printing base plate 211 is lifted and lowered by a hydraulic assembly. Lifting cylinders 232 for lifting and limiting are respectively fixed at the four corners of the bottom surface of the powder dropping plate 231 and the upper powder plate 221, and the bottom opening of the lifting cylinder 232 is docked with the telescopic columns on the bottom surface of the powder bin 22 and the powder dropping bin 23.

[0026] The scraper 32 for scraping the powder is arranged inside the rotating cavity 39 opened on the bottom surface of the moving arm 3. As the moving arm 3 moves, the powder can be spread flat by the scraper 32. A bracket 37 is fixed on one side of the bottom surface of the moving arm 3. A reciprocating screw 351 capable of rotation is arranged between the two brackets 37. A gear 35 is also fixed on one end of the reciprocating screw 351. The gear 35 meshes and drives the gear 2 34 connected above. A worm 341 is also connected to one side of the surface of the gear 2 34. The other end of the worm 341 is connected to the motor 2 342. Then the motor 2 342 can drive the reciprocating screw 351 to rotate together through the gear 2 34. A limiting column 371 is fixed between the two brackets 37 located above the reciprocating screw 351.

[0027] At the same time, the upper end of the movable rod 36 which can be reciprocally moved is respectively penetrated by the reciprocating screw 351 and the limit column 371. One end of the insert provided on the inner wall of the hole penetrated by the reciprocating screw 351 extends to the path on the surface of the reciprocating screw 351. The path is composed of two thread grooves with the same pitch and opposite rotation directions. Then, through the rotation of the reciprocating screw 351, the side of the thread groove pushes the insert placed in the thread groove to perform axial reciprocating motion.

[0028] A rotating shaft 1 24 is passed through the partition between the powder bin 22 and the powder bin 23, and a gear 6 243 and a gear 5 241 are fixed at both ends of the rotating shaft 1 24, respectively, and the gear 6 243 and the gear 5 241 are placed in the powder bin 22 and the powder bin 23, respectively. One end of the rotating shaft 2 61 that can rotate passes through the surface of the powder bin 23 and extends toward the gear 5 241. A gear 7 612 is fixed at one end of the rotating shaft 2 61 near the gear 5 241, and the gear 7 612 is meshed and connected with the crown gear 242 provided on one side of the surface of the gear 5 241. Therefore, after the rotating shaft 2 61 rotates, the crown gear 242 can be driven by the gear 7 612.

[0029] A ratchet wheel 1 611 is fixed to one end of the rotating shaft 2 61 near the moving rod 36, and a rotatable gear 46 is sleeved on the outer circumference of the ratchet wheel 1 611, and the gear 46 is meshed with the rack 1 361 fixedly connected below the moving rod 36. A ratchet 62 is provided at the hollow inner ring wall of the gear 46, and one end of the ratchet 62 is clamped with the outer circumference of the ratchet wheel 1 611, and a spring 63 is connected between the upper surface of the ratchet 62 and the hollow inner wall of the gear 46. The ratchet wheel 1 611 can then be rotated in a single direction by the ratchet 62.

[0030] like Figure 9-12As shown, a ratchet 2 613 is fixed on one side of the outer circumference of the rotating shaft 2 61, and a limiter 614 is provided on one side of the ratchet 2 613 to limit the rotation of the rotating shaft 2 61. The limiter 614 is composed of a pawl and a spring, and an electric push rod 615 is fixedly connected to one end of the limiter 614. Through the operation of the electric push rod 615, one end of the limiter 614 can be moved away from the ratchet 2 613. A rack 233 extends from the bottom of the powder dropping plate 231 toward the direction of the gear 5 241, and the rack 233 is meshed with the gear 5 241. At the same time, a rack 3 222 extends from the bottom of the powder loading plate 221 toward the direction of the gear 6 243, and the rack 3 222 is meshed with the gear 6 243. Therefore, when the metal powder needs to be laser printed, the motor 1 4 is running, and then the threaded rod 41 rotates to drive the scraper 32 below to push the powder on the upper powder plate 221 to the top of the printing base plate 211, and then the new powder can cover the printing area, and the excess powder is scraped to the inside of the powder drop bin 23 for collection after passing through the powder bin 22 on the other side. After the scraper 32 moves to the top of the powder drop bin 23, the motor 2 342 is running and drives the reciprocating screw 351 through the gear 2 34. After the reciprocating screw 351 rotates, the moving arm 3 drives the reciprocating screw 351 to move. The rod 36 drives the rack 1 361 below to drive the gear 4 6, and then the pawl 62 inside the gear 4 6 pushes the ratchet 1 611. After the ratchet 1 611 rotates, the gear 7 612 can make the rotating shaft 1 24 rotate together. As the rotating shaft 1 24 rotates, the gear 5 241 and the gear 6 243 provided at both ends drive the rack 233 and the rack 3 222 respectively, so that the powder dropping plate 231 can fall, and the powder loading plate 221 can move up. As the powder loading plate 221 moves up, after the scraper 32 moves in the opposite direction, the powder can be pushed to the top of the printing base plate 211. The scraper 32 can scrape powder and print when it moves back and forth.

[0031] like Fig. 9 and Figure 13-Figure 17 As shown, a worm wheel 321 extends from the central axis of the scraper 32 to one side, and the worm wheel 321 is meshed with the worm 341. At the same time, the scraper 32 is connected to the inside of the rotating chamber 39 to form an axis, so that the scraper 32 can rotate with the center as the axis (as shown in FIG. Fig.133 shows the axial relationship between the bottom structure of the scraper 32 and the rotating chamber 39), and a movable plate 7 capable of displacement along the length direction of the scraper 32 is provided on one side below the movable arm 3, and a brush 71 is distributed on the surface of the movable plate 7 opposite to the scraper 32. Therefore, after the scraper 32 scrapes the powder to one side, some powder will remain on its scraping surface. As the motor 2 342 runs, its worm 341 drives the worm gear 321 meshingly connected above, and the scraper 32 can be rotated 180 degrees. When the scraper 32 rotates, the powder remaining on the surface of the scraper 32 can be removed by the brush 71 to prevent the scraper 32 from causing an impact when the scraper 32 moves in the reverse direction.

[0032] A gear 1 33 is also meshed above the gear 2 34 , and the gear 1 33 can be rotated as the gear 2 34 rotates. At the same time, a rotating disk 331 is fixed on the surface of the gear 1 33 toward the inside of the movable arm 3 , and an eccentric column 332 is also fixed away from the center of the rotating disk 331 .

[0033] A moving box 73 extends from the moving plate 7 to the rotating disk 331. A limiting groove 731 is provided on the surface of the moving box 73 that fits the surface of the rotating disk 331, and one end of the eccentric column 332 extends into the limiting groove 731. At the same time, a guide column 732 extends from one side of the surface of the moving box 73 to the inside of the moving arm 3. The guide column 732 is arranged in a rectangular structure. Therefore, when the gear 2 34 rotates, the gear 1 33 meshing above is driven. As the gear 1 33 rotates, the moving box 73 is driven by the eccentric column 332, and then the moving plate 7 can continuously move along the length direction of the scraper 32, so that the brush 71 can wipe the surface of the scraper 32.

[0034] like Figure 17-Figure 18 As shown, when the brush 71 wipes the surface of the scraper 32, the powder dropped by the wiping will scatter, which will then affect the metal printing on the printing base plate 211. An adsorption hole 72 is provided on the surface of the movable plate 7, and the adsorption hole 72 is used to adsorb the powder remaining on the surface of the scraper 32. At the same time, an adsorption bin 381 is provided on the inner wall of the rotating chamber 39 close to the movable plate 7, and an adsorption hole 2 38 is provided from the inside of the adsorption bin 381 to the direction of the movable plate 7. At the same time, a dust box 5 is fixed above the movable arm 3, and a fan 52 for dust collection is arranged on the upper surface of the movable arm 3, and a dust pipe 51 is extended from the adsorption bin 381 to the direction of the dust box 5. The filter bin 53 for material absorption is connected with the dust pipe 51 and the fan 52 respectively, and a filter cotton 531 for filtering is also arranged inside the filter bin 53. Therefore, when the scraper 32 rotates and is cleaned by the brush 71, the fan 52 can be operated to remove the wiped powder through the dust suction pipe 51 to prevent any impact.

[0035] The power output of the fan 52 is composed of a double-shaft motor 521, one end of which is used to drive the fan blades, and the other end of the double-shaft motor 521 is connected to a rotating shaft 522. At the same time, a connecting rod 532 is also connected above the filter cotton 531, and connecting disks 533 are respectively fixed at the ends of the connecting rod 532 and the rotating shaft 522, and magnetic blocks are also fixed on the surfaces of the two opposite connecting disks 533, which drive the filter cotton 531 to rotate through magnetism. The outer peripheral surface of the connecting disk 533 at the end of the rotating shaft 522 is also threadedly connected to a connecting sleeve 534, which is used to prevent the rotating filter cotton 531 from deviating. Therefore, when the fan 52 is sucking and filtering dust, the connecting plate 533 under the rotating shaft 522 can drive the filter cotton 531 to rotate through magnetism. As the filter cotton 531 continues to rotate, the dust will not be concentrated in a certain area, thereby extending the service life of the filter cotton 531, and large particles are thrown to the edge through centrifugal force, thereby reducing the burden on the core part of the filter cotton 531.

[0036] A powder dropping and scraping structure for dual laser printing equipment works as follows: During the laser printing of metal powder, the motor 4 is first started to drive the threaded rod 41 to rotate. This action causes the moving arm 3 to move together with the scraper 32 below it, and the powder on the upper powder plate 221 is evenly pushed to the top of the printing base plate 211 to form a new layer of powder for printing. In this process, the excess powder exceeding the demand will be pushed to the powder bin 22 on the other side by the scraper 32, and finally fall into the powder bin 23 for collection. When the scraper 32 moves to the top of the powder bin 23, the motor 2 342 starts to work and drives the reciprocating screw 351 through the gear 2 34. As the reciprocating screw 351 rotates, the moving rod 36 and the rack 1 361 below it move accordingly, thereby driving the gear 4 6. The ratchet 62 inside the gear 4 6 will push the ratchet 1 611, and the rotation of the ratchet 1 611 drives the rotating shaft 1 24 to rotate together through the gear 7 612. The gear 5 241 and the gear 6 243 at both ends of the rotating shaft 1 24 are meshed with the rack 233 and the rack 3 222 respectively, causing the powder dropping plate 231 to descend and the powder loading plate 221 to ascend. In this way, when the powder loading plate 221 ascends, the scraper 32 can push the powder to the top of the printing base plate 211 again when moving in the reverse direction, ensuring that each back and forth movement of the scraper 32 can complete an effective powder laying, supporting the continuous laser printing process; After the scraper 32 finishes scraping the powder on one side, some powder may remain on its surface. In order to clean up these residual powders and prevent them from affecting the subsequent printing work when the scraper 32 moves in the reverse direction, the motor 2 342 is started, and the worm gear 321 meshed with it is driven by the worm 341, so that the scraper 32 can rotate 180 degrees. This flipping action ensures that the scraping surface of the scraper 32 can be thoroughly cleaned. While the scraper 32 rotates, the brush 71 will contact the surface of the scraper 32 to remove the residual powder on it. This cleaning process is necessary to ensure that the scraper 32 will not affect the quality or thickness of the powder layer due to the residual powder when it moves next time. In addition, when the gear 2 34 rotates, it will drive the gear 1 33 meshed with it above. As the gear 1 33 rotates, the eccentric column 332 moves accordingly and pushes the moving box 73. Therefore, the moving plate 7 will move back and forth along the length direction of the scraper 32. In this way, the brush 71 can wipe the entire surface of the scraper 32 to ensure that the entire surface can be effectively cleaned, thereby preparing for the subsequent powder laying and laser printing; During the process of the scraper 32 rotating and being cleaned by the brush 71, in order to ensure that the removed powder will not pollute the working environment again or affect the printing quality, the fan 52 will start and extract the powder through the dust suction pipe 51. This process effectively prevents the secondary flying and residue of the powder. When the fan 52 is performing suction and dust filtering operations, the connecting plate 533 under the rotating shaft 522 drives the filter cotton 531 to rotate through magnetic coupling. This design allows the filter cotton 531 to rotate continuously during use to avoid dust concentration in a specific area. In this way, the filter cotton 531 can capture dust more evenly, thereby extending its service life. In addition, as the filter cotton 531 rotates, larger particles will be thrown to the edge due to the action of centrifugal force, which reduces the burden on the core part of the filter cotton and further improves the filtering efficiency and effect.

[0037] It should be noted that the specific models and specifications of the dual laser print head 13, fan 52, motor 2 342, motor 1 4, dual-axis motor 521 and electric push rod 615 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be repeated in detail.

[0038] The power supply and principles of the dual laser print heads 13, the fan 52, the motor 2 342, the motor 1 4, the dual-axis motor 521 and the electric push rod 615 are clear to those skilled in the art and will not be described in detail here.

[0039] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A powder dropping and scraping structure suitable for dual laser printing equipment, comprising a printing table (2), and a movable arm (3) arranged opposite to the printing table (2), characterized in that: The upper surface of the printing platform (2) is laterally distributed with a powder dropping bin (23), a powder material bin (22) and a printing bin (21), a powder dropping plate (231) capable of being displaced up and down is provided inside the powder dropping bin (23), a powder loading plate (221) capable of being displaced up and down is provided inside the powder material bin (22), and a printing base plate (211) capable of being displaced up and down is provided inside the printing bin (21). A rotating shaft (24) is passed through the partition between the powder material bin (22) and the powder dropping bin (23), and a gear (243) and a gear (241) are fixed at both ends of the rotating shaft (24), respectively. The gear (243) and the gear (241) drive a rack (222) and a rack (233) provided on the bottom surfaces of the powder dropping plate (231) and the powder loading plate (221), respectively. A scraper (32) for scraping powder is provided inside a rotating cavity (39) provided on the bottom surface of the movable arm (3).

2. The powder dropping and scraping structure for dual laser printing equipment according to claim 1 is characterized in that: A moving block (31) is also fixed to one end of one side of the moving arm (3), a threaded rod (41) is threadedly penetrated from one side of the surface of the moving block (31), and a motor (4) located at the end of the threaded rod (41) drives the threaded rod (41) to rotate, a bracket (37) is fixed to one side of the bottom surface of the moving arm (3), a rotatable reciprocating screw rod (351) is provided between the two brackets (37), and a gear (35) is also fixed to one end of the reciprocating screw rod (351).

3. The powder dropping and scraping structure for dual laser printing equipment according to claim 2 is characterized in that: The gear three (35) meshes with and drives the gear two (34) connected above, and a worm (341) is also connected to one side of the surface of the gear two (34), and the other end of the worm (341) is connected to the motor two (342). A limiting column (371) is fixed between the two brackets (37) above the reciprocating screw rod (351).

4. The powder dropping and scraping structure for dual laser printing equipment according to claim 3 is characterized in that: One end of the reciprocating screw rod (351) passes through the top of the moving rod (36), and a rotating shaft (61) passes through one side of the surface of the powder dropping bin (23). The rotating shaft (61) extends in the direction of the gear (241). A gear (612) is fixed to one end of the rotating shaft (61) close to the gear (241). The gear (612) is meshed and connected with a crown gear (242) provided on one side of the surface of the gear (241).

5. The powder dropping and scraping structure for dual laser printing equipment according to claim 4 is characterized in that: A ratchet wheel 1 (611) is fixed to one end of the rotating shaft 2 (61) of the moving rod (36), and a rotatable gear wheel 4 (6) is sleeved on the outer peripheral surface of the ratchet wheel 1 (611), and the gear wheel 4 (6) is meshed with a rack wheel 1 (361) fixedly connected to the lower part of the moving rod (36).

6. The powder dropping and scraping structure for dual laser printing equipment according to claim 5, characterized in that: A pawl (62) is provided at the hollow inner ring wall of the gear four (6), one end of the pawl (62) is engaged with the outer peripheral surface of the ratchet wheel one (611), and a spring (63) is connected between the upper surface of the pawl (62) and the hollow inner wall of the gear four (6).

7. The powder dropping and scraping structure for dual laser printing equipment according to claim 6, characterized in that: A second ratchet wheel (613) is fixed to one side of the outer peripheral surface of the second rotating shaft (61), and a limiting member (614) is provided on one side of the second ratchet wheel (613) to limit the second rotating shaft (61) from self-rotation, and an electric push rod (615) is fixedly connected to one end of the limiting member (614).

8. The powder dropping and scraping structure for dual laser printing equipment according to claim 7, characterized in that: A worm wheel (321) extends toward one side from the central axis of the scraper (32), and the worm wheel (321) is meshedly connected with the worm (341). A movable plate (7) capable of moving along the length direction of the scraper (32) is provided on one side below the movable arm (3), and a brush (71) is distributed on the surface of the movable plate (7) opposite to the scraper (32).

9. The powder dropping and scraping structure for dual laser printing equipment according to claim 8, characterized in that: The upper portion of the second gear (34) is also meshed with the first gear (33), a rotating disk (331) is fixed on the surface of the first gear (33) toward the inside of the movable arm (3), and an eccentric column (332) is also fixed away from the center of the rotating disk (331).

10. The powder dropping and scraping structure for dual laser printing equipment according to claim 9, characterized in that: A moving box (73) extends from the moving plate (7) in the direction of the rotating disk (331), a limiting groove (731) is provided on the surface of the moving box (73) that is in contact with the surface of the rotating disk (331), and one end of the eccentric column (332) extends into the inside of the limiting groove (731).

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