Powder falling device for additive manufacturing equipment

Abstract

The invention relates to the technical field of additive manufacturing, in particular to a powder falling device for additive manufacturing equipment, and mainly solves the serious fault problems that in the prior art, the sealing performance of a powder falling roller and a powder falling base is poor, powder is stored and clamped, powder falling of a powder falling system is uneven, and operation is clamped. Comprising a servo motor, a coupler, a powder falling seat, a powder falling roller, two bearings, a powder guiding bin, two felt rings and two powder guiding-out mechanisms, a powder falling cavity is formed in the powder falling seat, through holes communicated with the powder falling cavity are formed in the two transverse side faces of the powder falling seat, the two powder guiding-out mechanisms are arranged on the two transverse side faces of the powder falling seat respectively, the powder falling roller is arranged in the powder falling cavity, and the felt rings are arranged in the powder guiding-out mechanisms. The two transverse ends of the powder falling roller penetrate out of the powder falling cavity through the through holes and are rotationally arranged on the two powder guiding-out mechanisms through bearings, the servo motor is connected with one transverse end of the powder falling roller through a coupler, and the two felt ring sleeves are arranged on the two transverse sides of the powder falling roller in a sleeving mode respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to a powder dropping device for additive manufacturing equipment. Background Art

[0002] Additive manufacturing technology is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. Since it is not limited by the complexity of the part shape and does not require any tooling, it has a very wide range of applications. As one of the additive manufacturing technologies, selective laser sintering technology has also developed very rapidly in recent years. Its main process is: the powder feeding device delivers a certain amount of powder to the workbench, the powder spreading device spreads a layer of powder material on the upper surface of the piston formed part, and the galvanometer controls the laser to scan the solid part powder layer according to the cross-sectional axis profile of the layer, so that the temperature of the powder rises to the melting point, the powder melts and sinters, and is bonded to the formed part below; when a layer of cross section is sintered, the workbench drops a layer of thickness, and the powder spreading device spreads a layer of uniform and dense powder on it, and scans and sinters a new layer of cross section, and after several layers of scanning and superposition, the entire three-dimensional solid manufacturing is completed.

[0003] The existing powder feeding device generally includes a powder feeding box and a roller arranged below the powder feeding box. The powder in the powder feeding box falls through the gap between the roller and the side wall of the powder feeding box to complete the powder feeding. For example, Chinese patent announcement No. CN210236491U discloses a quantitative powder feeding mechanism for multiple powders suitable for additive manufacturing equipment, including a driving unit and a powder dropping unit; the powder dropping unit includes a mounting base provided with an upper cavity and a lower cavity, the upper cavity and the lower cavity are connected up and down, a powder dropping roller driven by the driving unit is fixed inside the lower cavity, and a powder outlet is provided at the lower part of the lower cavity; embedded wear-resistant adjustment blocks are also provided on both sides of the powder dropping roller inside the lower cavity. This powder feeding method has the advantage of occupying a small space and can solve the problem of uneven powder dropping of additive manufacturing equipment.

[0004] However, the powder dropping roller is rotatably arranged on the mounting base through a bearing, and the powder is a relatively fine granular structure. It is difficult to achieve effective sealing only by an embedded wear-resistant adjustment block, and frequent disassembly and cleaning are required. Chinese Patent Publication No. CN115229216A discloses a quantitative powder dropping device for laser sintering, and its specification discloses: bearing seats are symmetrically arranged between the left and right ends of the powder dropping roller and the powder dropping base, the bearing seats and the powder dropping base are positioned and fixed by 4 pins and 4 screws, a bearing is arranged between the bearing seat and the powder dropping roller, the inner side of the bearing is sealed by a cover and a powder dropping roller, and the bearing and the cover are sealed by a lip sealing ring; the cover and the powder dropping base are sealed by a felt seal, which improves the sealing of the axial ends of the powder dropping roller to a certain extent and reduces the number of disassembly and cleaning times, but it cannot completely solve the problem. After a long period of use, there is still powder leakage, which causes the bearing to be blocked and causes the problem of powder jamming. Moreover, the powder dropping roller of this structure is difficult to rotate, and the required torque increases, and it is necessary to cooperate with gear transmission or synchronous belt transmission to expand the torque, which leads to an increase in the space required for installation and an increase in failure factors. Summary of the invention

[0005] Therefore, in view of the above-mentioned problems, the present invention provides a powder dropping device for additive manufacturing equipment, which mainly solves the problems in the prior art of poor sealing between the powder dropping roller and the powder dropping base, powder accumulation and jamming, which cause serious faults such as uneven powder dropping of the powder dropping system and jamming during operation.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A powder dropping device for additive manufacturing equipment comprises a servo motor, a coupling, a powder dropping seat, a powder dropping roller, two bearings, a powder guide bin, two felt rings and two powder material outlet mechanisms, wherein the axial direction extending along the powder dropping roller is defined as a transverse direction; The powder dropping seat is provided with a powder dropping cavity, the upper surface of the powder dropping seat is provided with a powder inlet connected to the powder dropping cavity, the lower surface of the powder dropping seat is provided with a powder outlet connected to the powder dropping cavity, the powder guide bin is provided at the powder outlet, the two lateral side surfaces of the powder dropping seat are provided with through holes connected to the powder dropping cavity, the two powder material outlet mechanisms are respectively provided on the two lateral side surfaces of the powder dropping seat and are distributed at the through holes, the powder dropping roller is provided in the powder dropping cavity, and the lateral ends of the powder dropping roller pass through the powder dropping cavity through the through holes, a plurality of material storage grooves are provided on the circumferential surface surrounding the powder dropping roller, and each of the material storage grooves is distributed in the lateral direction, the lateral ends of the powder dropping roller are rotatably provided on the two powder material outlet mechanisms through bearings, and the servo motor is connected to one lateral end of the powder dropping roller through a coupling; The two felt rings are respectively sleeved on the lateral sides of the powder dropping roller and distributed between the powder dropping seat and the powder discharge mechanism. The powder discharge mechanism is provided with a powder discharge port located between the felt ring and the bearing for discharging overflowed powder. The powder discharge port is distributed at the lower part of the powder discharge mechanism.

[0007] Furthermore, the powder export mechanism includes a first mounting seat and a second mounting seat, the first mounting seat is locked on the powder dropping seat by bolts, the first mounting seat is provided with a first mounting hole for a lateral end of the powder dropping roller to pass through, the first mounting hole is coaxially arranged with the through hole, the second mounting seat is locked on the first mounting seat, the second mounting seat is provided with a second mounting hole for a lateral end of the powder dropping roller to pass through, and the bearings are distributed at the second mounting hole.

[0008] Furthermore, the powder discharge port is arranged on the first mounting seat and is connected to the first mounting hole.

[0009] Furthermore, the powder discharge port includes a first powder discharge port and a second powder discharge port, the first powder discharge port is arranged on the first mounting seat and communicated with the first mounting hole, and the second powder discharge port is arranged on the second mounting seat and communicated with the second mounting hole.

[0010] Furthermore, the second row of powder openings are distributed on an end surface of the second mounting seat that contacts the first mounting seat.

[0011] Furthermore, a convex ring is convexly provided in the first mounting hole, and the convex ring is distributed on a lateral side of the first powder discharge port close to the second mounting seat.

[0012] Furthermore, a chamfered structure is provided on the peripheral edge of the second mounting hole on one lateral side close to the first mounting seat, and the upper end of the second row of powder ports is distributed at the chamfered structure.

[0013] Furthermore, the powder dropping roller includes a main body and wear-resistant journals locked at both lateral ends of the main body by bolts, the main body is distributed in the powder dropping cavity, and the two wear-resistant journals are respectively connected to the powder outlet mechanism.

[0014] Furthermore, guide ports for receiving powder discharged from the powder discharge port are provided on both lateral sides of the powder dropping seat and located below the powder discharge mechanism, and the lower ends of the guide ports are connected to the interior of the guide bin.

[0015] Furthermore, the powder dropping seat includes an upper seat body and a lower seat body, the powder inlet is distributed on the upper surface of the upper seat body, the lower surface of the upper seat body is concavely provided with an upper groove, the powder outlet is distributed on the lower surface of the lower seat body, the upper surface of the lower seat body is concavely provided with a lower groove, the upper seat body is locked and connected to the lower seat body by bolts, and the upper groove is connected to the lower groove to form a powder dropping chamber.

[0016] By adopting the above-mentioned technical scheme, the beneficial effects of the present invention are as follows: in the powder dropping device for additive manufacturing equipment, the powder stored in the powder bin on the top of the equipment enters the powder dropping cavity on the powder dropping seat through the powder inlet, and is covered in the material storage tank on the upper side of the powder dropping roller. At the same time, the powder dropping roller is driven to rotate by the servo motor, and the powder dropping roller cooperates with the powder dropping seat so that the powder is evenly laid in the material storage tank during the rotation of the powder dropping roller, and then rotates to the upper side of the powder outlet, and the powder in the material storage tank is discharged from the powder outlet, and finally discharged through the powder guide bin, thereby realizing accurate and quantitative powder dropping. Furthermore, the provided felt rings are respectively sleeved on the lateral sides of the powder dropping roller, and are distributed between the powder dropping seat and the powder guide bin. The initial sealing effect is achieved between the powder outlet mechanisms, and when the felt ring is worn due to the long-term rotation of the powder dropping roller, the overflowed powder is discharged from the powder outlet located between the felt ring and the bearing on the powder outlet mechanism, so as to avoid the problem of bearing blockage and powder jamming caused by the accumulation of powder on the bearing. At the same time, by using felt rings and dust-proof bearings with good wear resistance, the service life is improved. At the same time, the powder outlet mechanisms are respectively arranged at the through holes on the two lateral sides of the powder dropping seat, and the easily removable wear-resistant shaft necks at the lateral ends of the powder dropping roller are rotatably arranged on the two powder outlet mechanisms through bearings, which is convenient for disassembly and installation of the powder outlet mechanism and improves the convenience of replacement of bearings and felt rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 is a schematic diagram of the decomposed structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of the exploded structure from a first perspective in an embodiment of the present invention without the powder dropping seat and the material guide bin; Figure 4 is a schematic diagram of the exploded structure from a second perspective in which the powder dropping seat and the material guide bin are omitted in the embodiment of the present invention; Figure 5 is a schematic diagram of the exploded structure from a third perspective in which the powder dropping seat and the material guide bin are omitted in the embodiment of the present invention; Figure 6 It is a schematic diagram of the exploded structure of the powder drop seat in the embodiment of the present invention.

[0018] Description of reference numerals: 1. Servo motor; 2. Coupling; 3. Powder drop seat; 4. Powder drop roller; 5. Bearing; 6. Powder guide bin; 7. Felt ring; 8. Powder outlet mechanism; 9. Powder outlet; 10. Chamfering structure; 11. Convex ring; 12. Material guide port; 13. Giving way groove; 30. Powder dropping chamber; 31. Powder inlet; 32. Powder outlet; 34. Upper seat; 35. Lower seat; 36. Upper groove; 37. Lower groove; 40. Storage tank; 41. Main body; 42. Wear-resistant journal; 81. first mounting seat; 82. second mounting seat; 83. first mounting hole; 84. second mounting hole; 91, first row of powder openings; 92, second row of powder openings. DETAILED DESCRIPTION

[0019] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0020] The embodiments of the present invention are: refer to Figures 1 to 6 As shown, a powder dropping device for additive manufacturing equipment comprises a servo motor 1, a coupling 2, a powder dropping seat 3, a powder dropping roller 4, two bearings 5, a powder guide bin 6, two felt rings 7 and two powder material outlet mechanisms 8, wherein the axial direction extending along the powder dropping roller 4 is defined as the transverse direction; The powder dropping seat 3 is provided with a powder dropping chamber 30, the upper surface of the powder dropping seat 3 is provided with a powder inlet 31 communicating with the powder dropping chamber 30, the lower surface of the powder dropping seat 3 is provided with a powder outlet 32 ​​communicating with the powder dropping chamber 30, the powder guide bin 6 is provided at the powder outlet 32, the two lateral sides of the powder dropping seat 3 are provided with through holes (not shown in the figure) communicating with the powder dropping chamber 30, the two powder material outlet mechanisms 8 are respectively provided on the two lateral sides of the powder dropping seat 3 and distributed at the through holes, the powder dropping roller 4 is provided in the powder dropping chamber 30, and the lateral ends of the powder dropping roller 4 pass through the powder dropping chamber 30 through the through holes, a plurality of material storage grooves 40 are provided on the circumferential surface surrounding the powder dropping roller 4, and each of the material storage grooves 40 is distributed in the lateral direction, the lateral ends of the powder dropping roller 4 are rotatably provided on the two powder material outlet mechanisms 8 through bearings 5, and the servo motor 1 is connected to one lateral end of the powder dropping roller 4 through a coupling 2; The two felt rings 7 are respectively sleeved on the lateral sides of the powder dropping roller 4, and are distributed between the powder dropping seat 3 and the powder discharge mechanism 8. The powder discharge mechanism 8 is provided with a powder discharge port 9 located between the felt ring 7 and the bearing 5 for discharging overflowed powder. The powder discharge port 9 is distributed at the lower part of the powder discharge mechanism 8.

[0021] The bearing 5 mentioned above is a dustproof bearing.

[0022] In the powder dropping device for additive manufacturing equipment, the powder stored in the powder bin on the top of the equipment enters the powder dropping chamber 30 on the powder dropping seat 3 through the powder inlet 31, and is covered in the material storage tank 40 on the upper side of the powder dropping roller 4. At the same time, the powder dropping roller 4 is driven to rotate by the servo motor 1, and the powder dropping roller 4 cooperates with the powder dropping seat 3, so that the powder is evenly laid in the material storage tank 40 during the rotation of the powder dropping roller 4, and then rotates to the upper side of the powder outlet 32, and the powder in the material storage tank 40 is discharged from the powder outlet 32, and finally discharged through the powder guide bin 6, so as to realize accurate quantitative powder dropping. Furthermore, the felt rings 7 are respectively sleeved on the lateral sides of the powder dropping roller 4, and are distributed between the powder dropping seat 3 and the powder outlet mechanism 8. The initial sealing effect is achieved between the felt rings 7 and the powder dropping rollers 4, and when the felt rings 7 are worn due to the long-term rotation of the powder dropping roller 4, the overflowing powder is discharged from the powder discharge port 9 located between the felt rings 7 and the bearings 5 ​​on the powder discharge mechanism 8, so as to avoid the accumulation of powder on the bearings 5 ​​and the blockage and powder jamming of the bearings 5. At the same time, by using the felt rings 7 with good wear resistance and the dust-proof bearings, the service life is improved. At the same time, the powder discharge mechanism 8 is respectively arranged at the through holes on the two lateral sides of the powder dropping seat 3, and the lateral ends of the powder dropping roller 4 are rotatably arranged on the two powder discharge mechanisms 8 through the bearings 5, which is convenient for the disassembly and installation of the powder discharge mechanism 8 and improves the convenience of replacing the bearings 5 ​​and the felt rings 7.

[0023] In addition, the powder discharge mechanism 8 includes a first mounting seat 81 and a second mounting seat 82, the first mounting seat 81 is locked on the powder dropping seat 3 by bolts, the first mounting seat 81 is provided with a first mounting hole 83 for a lateral end of the powder dropping roller 4 to pass through, the first mounting hole 83 is coaxially arranged with the through hole, the second mounting seat 82 is locked on the first mounting seat 81, the second mounting seat 82 is provided with a second mounting hole 84 for a lateral end of the powder dropping roller 4 to pass through, the bearing 5 is distributed at the second mounting hole 84, further improving the convenience of disassembly and installation of the powder discharge mechanism 8, so that the powder can be better discharged from the powder discharge port 9, and the powder discharge port 9 is convenient for cleaning.

[0024] In this embodiment, the powder discharge port 9 includes a first powder discharge port 91 and a second powder discharge port 92. The first powder discharge port 91 is arranged on the first mounting seat 81 and is connected to the first mounting hole 83. The second powder discharge port 92 is arranged on the second mounting seat 82 and is connected to the second mounting hole 84. The two-stage powder discharge structure of the first powder discharge port 91 and the second powder discharge port 92 is provided to improve the powder discharge efficiency and the powder discharge effect, and reduce the occurrence of powder jamming. Of course, it can also be arranged as follows: the powder discharge port 9 is arranged on the first mounting seat 81 and is connected to the first mounting hole 83. Powder discharge is achieved through only one powder discharge port 9. Compared with the two arranged powder discharge ports, the powder discharge effect is poor, but it can also solve the technical problems to be solved in this application document.

[0025] It is worth noting that the second row of powder openings 92 are distributed on an end surface of the second mounting seat 82 that contacts the first mounting seat 81, and a chamfered structure 10 is provided on the peripheral edge of the second mounting hole 84 on the lateral side close to the first mounting seat 81. The upper ends of the second row of powder openings 92 are distributed at the chamfered structure 10, which facilitates the cleaning of the second row of powder openings 92 on the one hand, and is beneficial to the processing of the second row of powder openings 92 on the other hand, and facilitates the discharge of powder.

[0026] Furthermore, a convex ring 11 is convexly provided in the first mounting hole 83 , and the convex ring 11 is distributed on a lateral side of the first powder row port 91 close to the second mounting seat 82 , so as to facilitate the positioning and installation of the bearing 5 and further improve the sealing effect to prevent powder from penetrating into the bearing 5 .

[0027] Specifically, the powder dropping roller 4 includes a main body 41 and wear-resistant shaft necks 42 which are locked at both lateral ends of the main body 41 by bolts. The main body 41 is distributed in the powder dropping chamber 30, and the two wear-resistant shaft necks 42 are respectively connected to the powder discharge mechanism 8, which further improves the convenience of disassembly and installation of the equipment, reduces the difficulty of accessory processing, and thus reduces production costs.

[0028] In addition, guide ports 12 for receiving the powder discharged from the powder discharge port 9 are provided on both lateral sides of the powder dropping seat 3 and at the lower side of the powder discharge mechanism 8. The lower end of the guide port 12 is connected to the interior of the guide bin 6, so that the powder overflowing from the first powder discharge port 91 and the second powder discharge port 92 enters the guide bin 6 through the guide port 12, thereby reducing the influence of the external environment and improving the cleanliness of the equipment.

[0029] In this embodiment, the powder dropping seat 3 includes an upper seat body 34 and a lower seat body 35, the powder inlet 31 is distributed on the upper surface of the upper seat body 34, the lower surface of the upper seat body 34 is recessed with an upper groove 36, the powder outlet 32 ​​is distributed on the lower surface of the lower seat body 35, the upper surface of the lower seat body 35 is recessed with a lower groove 37, the upper seat body 34 is locked and connected to the lower seat body 35 by bolts, and the upper groove 36 is connected to the lower groove 37 to form a powder dropping chamber 30, and a clearance groove 13 for accommodating the felt ring 7 is provided on the peripheral edge of the first mounting hole 83 near the lateral side of the powder dropping seat 3 to improve the convenience of installation.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A powder dropping device for additive manufacturing equipment, characterized in that: It includes a servo motor, a coupling, a powder dropping seat, a powder dropping roller, two bearings, a powder guide bin, two felt rings and two powder material outlet mechanisms, and the axial direction extending along the powder dropping roller is defined as the transverse direction; The powder dropping seat is provided with a powder dropping cavity, the upper surface of the powder dropping seat is provided with a powder inlet connected to the powder dropping cavity, the lower surface of the powder dropping seat is provided with a powder outlet connected to the powder dropping cavity, the powder guide bin is provided at the powder outlet, the two lateral side surfaces of the powder dropping seat are provided with through holes connected to the powder dropping cavity, the two powder material outlet mechanisms are respectively provided on the two lateral side surfaces of the powder dropping seat and are distributed at the through holes, the powder dropping roller is provided in the powder dropping cavity, and the lateral ends of the powder dropping roller pass through the powder dropping cavity through the through holes, a plurality of material storage grooves are provided on the circumferential surface surrounding the powder dropping roller, and each of the material storage grooves is distributed in the lateral direction, the lateral ends of the powder dropping roller are rotatably provided on the two powder material outlet mechanisms through bearings, and the servo motor is connected to one lateral end of the powder dropping roller through a coupling; The two felt rings are respectively sleeved on the lateral sides of the powder dropping roller and distributed between the powder dropping seat and the powder discharge mechanism. The powder discharge mechanism is provided with a powder discharge port located between the felt ring and the bearing for discharging overflowed powder. The powder discharge port is distributed at the lower part of the powder discharge mechanism.

2. The powder dropping device for additive manufacturing equipment according to claim 1, characterized in that: The powder material export mechanism includes a first mounting seat and a second mounting seat, the first mounting seat is locked on the powder dropping seat by bolts, the first mounting seat is provided with a first mounting hole for a lateral end of the powder dropping roller to pass through, the first mounting hole is coaxially arranged with the through hole, the second mounting seat is locked on the first mounting seat, the second mounting seat is provided with a second mounting hole for a lateral end of the powder dropping roller to pass through, and the bearings are distributed at the second mounting hole.

3. The powder dropping device for additive manufacturing equipment according to claim 2, characterized in that: The powder discharge port is arranged on the first mounting seat and is communicated with the first mounting hole.

4. The powder dropping device for additive manufacturing equipment according to claim 2, characterized in that: The powder discharge port includes a first powder discharge port and a second powder discharge port, the first powder discharge port is arranged on the first mounting seat and communicated with the first mounting hole, and the second powder discharge port is arranged on the second mounting seat and communicated with the second mounting hole.

5. The powder dropping device for additive manufacturing equipment according to claim 4, characterized in that: The second row of powder openings is distributed on an end surface of the second mounting seat that contacts the first mounting seat.

6. The powder dropping device for additive manufacturing equipment according to claim 5, characterized in that: A convex ring is convexly disposed in the first mounting hole, and the convex ring is distributed on a lateral side of the first powder discharge port close to the second mounting seat.

7. The powder dropping device for additive manufacturing equipment according to claim 6, characterized in that: A chamfered structure is provided on the peripheral edge of the second mounting hole on one lateral side close to the first mounting seat, and the upper ends of the second row of powder ports are distributed at the chamfered structure.

8. The powder dropping device for additive manufacturing equipment according to claim 2, characterized in that: The powder dropping roller comprises a main body and wear-resistant journals which are locked at both lateral ends of the main body by bolts. The main body is arranged in the powder dropping cavity, and the two wear-resistant journals are respectively connected to the powder outlet mechanism.

9. The powder dropping device for additive manufacturing equipment according to any one of claims 1 to 8, characterized in that: Material guide ports for receiving powder discharged from the powder discharge port are provided on both lateral sides of the powder drop seat and located at the lower side of the powder discharge mechanism, and the lower ends of the material guide ports are communicated with the interior of the material guide bin.

10. The powder dropping device for additive manufacturing equipment according to claim 1, characterized in that: The powder dropping seat includes an upper seat body and a lower seat body, the powder inlet is distributed on the upper surface of the upper seat body, the lower surface of the upper seat body is concavely provided with an upper groove, the powder outlet is distributed on the lower surface of the lower seat body, the upper surface of the lower seat body is concavely provided with a lower groove, the upper seat body is locked and connected with the lower seat body by bolts, and the upper groove is connected with the lower groove to form a powder dropping chamber.

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