Old powder collecting and recycling proportioning device for 3D printer

Abstract

The application discloses a 3D printer old powder collecting and recycling proportioning device and relates to the technical field of printers. The device comprises a collecting unit, a conveying unit and a proportioning unit. The collecting unit comprises an operation table, a powder laying groove arranged in the operation table, a powder suction assembly arranged in the powder laying groove and a pushing assembly arranged in the operation table and matched with the powder suction assembly. The conveying unit comprises storage boxes arranged on both sides of the operation table, a residue discharging assembly arranged in the storage box and a discharging assembly arranged in the storage box. The proportioning unit comprises a rotating assembly arranged in the storage box and connected with the discharging assembly. The device can collect the old powder after printing by arranging the powder suction assembly. In combination with the pushing assembly and the residue discharging assembly, the device can realize the effect of automatically filtering and storing the old powder for secondary use. The old powder and the new powder in the storage box can be proportioned according to the required proportion by the proportioning unit, so that the production cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printers, in particular to a used powder collecting and recycling proportioning device for a 3D printer. BACKGROUND

[0002] Powder laying printing is a technology for 3D printing using powder materials, and a double feeding mechanism is usually provided, powder is stored in a storage box arranged on both sides of an operation table, powder laying is performed by a powder laying scraper, after printing is completed, the used powder material is collected by manual cleaning of the operation table, and is sent back to the storage box and then is sent to the powder laying scraper by an existing conveying device for recycling, so that material waste is reduced and cost is lowered.

[0003] By sintering or melting the powder on the powder layer according to a predetermined path by a laser beam or other heat source, the powder particles are bonded together to form a solid object, which will cause the used powder to contain clumps, and when the laser beam or other heat source contacts the clumps during reuse, the printing quality is affected, resulting in uneven surface of the finished product, and during the printing process, the used powder is affected by external pollution or impurities, reducing the purity and quality of the powder, which requires mixing new powder with the recycled used powder to ensure the quality of the finished product, which requires screening impurities and proportioning new and old powder by additional equipment, which increases labor cost and production cost, and the efficiency is also low. SUMMARY

[0004] In view of the problems that the existing used powder collecting and recycling proportioning device for a 3D printer contains impurities and needs to be screened and stored before use, and the screened used powder cannot be used alone, the present application is proposed.

[0005] To solve the above technical problems, the present application provides the following technical scheme, including a collecting unit, an operation table, a powder laying groove arranged in the operation table, a powder suction assembly arranged in the powder laying groove, and a pushing assembly arranged in the operation table and matched with the powder suction assembly; a conveying unit, including storage boxes arranged on both sides of the operation table, a residue discharging assembly arranged in the storage box, and a discharging assembly arranged in the storage box; a proportioning unit, including a rotating assembly arranged in the storage box and connected with the discharging assembly, a distribution assembly arranged on the rotating assembly, a limiting assembly arranged outside the storage box and connected with the distribution assembly, and a locking assembly arranged outside the storage box.

[0006] As a preferred scheme of the used powder collecting and recycling proportioning device for a 3D printer, the powder suction assembly includes a through hole arranged in the inner wall of the powder laying groove, a flow-through cavity arranged in the operation table, and a vacuum pump arranged on the operation table.

[0007] As a preferred scheme of the old powder collecting and recycling proportioning device for the 3D printer, the pushing assembly comprises a pushing groove arranged in the flow cavity, a shunt rod arranged in the pushing groove, and a pushing plate arranged outside the shunt rod; the outer edge of the pushing plate is attached to the inner wall of the pushing groove.

[0008] As a preferred scheme of the old powder collecting and recycling proportioning device for the 3D printer, the device further comprises a conveying assembly, the conveying assembly comprises a conveying hole arranged in the operation table, a motor arranged on one side of the storage box, a connecting rod arranged on the motor, and a spiral plate arranged outside the connecting rod; two groups of spiral plates are symmetrically arranged on the outer middle shaft of the connecting rod, and the spiral directions of the two groups of spiral plates are opposite.

[0009] As a preferred scheme of the old powder collecting and recycling proportioning device for the 3D printer, the discharging assembly comprises a new powder bin and an old powder bin arranged in the storage box, a screening cylinder arranged outside the conveying hole and in the old powder bin, a discharging port arranged on one side of the old powder bin, a chute arranged on the lower side of the storage box, and a storage box arranged in the chute.

[0010] As a preferred scheme of the old powder collecting and recycling proportioning device for the 3D printer, the discharging assembly comprises a new powder bin and an old powder bin arranged in the storage box, a screening cylinder arranged outside the conveying hole and in the old powder bin, a discharging port arranged on one side of the old powder bin, a chute arranged on the lower side of the storage box, and a storage box arranged in the chute.

[0011] As a preferred scheme of the old powder collecting and recycling proportioning device for the 3D printer, the rotating assembly comprises a driven rod arranged in the distribution groove, a motor arranged on one end of the driven rod, a rotating seat arranged on the driven rod, and an annular plate arranged outside the rotating seat; the annular plate is rotationally connected to the distribution groove.

[0012] As a preferred scheme of the old powder collecting and recycling proportioning device for the 3D printer, the distribution assembly comprises a new powder hopper arranged outside the rotating seat and in the front part of the annular plate, an old powder hopper arranged outside the rotating seat and in the rear part of the annular plate, a limiting groove arranged on the new powder hopper and the old powder hopper, and an isolation plate arranged in the limiting groove; the new powder hopper and the old powder hopper are matched with the discharge port.

[0013] As a preferred scheme of the old powder collecting and recycling proportioning device for the 3D printer, the limiting assembly comprises an operation groove arranged on one side of the storage tank, an adjusting groove arranged in the operation groove and communicated with the distribution groove, a rotating ring groove arranged on the inner wall of the adjusting groove, a limiting ring groove arranged on the inner wall of the rotating ring groove, a fixed ring arranged in the limiting ring groove, and a connecting block arranged on the isolation plate; and the fixed ring is fixedly connected to the outer side surface of the connecting block.

[0014] As a preferred scheme of the old powder collecting and recycling proportioning device for the 3D printer, the locking assembly comprises a sliding groove arranged on the inner side wall of the operation groove and located on both sides of the adjusting groove, a sliding seat arranged in the sliding groove, a sliding button arranged in the sliding seat, a limiting block arranged on both sides of the sliding button, and a spring arranged in the inner side of the limiting block; and the sliding button is matched with the fixed ring.

[0015] The old powder collecting and recycling proportioning device for the 3D printer has the following beneficial effects: the powder suction assembly can collect the old powder after printing, and the pushing assembly and the slag discharging assembly are matched to realize the effect of automatically filtering impurities and storing the old powder for secondary use; the old powder and the new powder in the storage tank are proportioned by the proportioning unit according to the required proportion for use, so that the production cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0017] Figure 1 It is a whole structure schematic view of the old powder collecting and recycling proportioning device for the 3D printer.

[0018] Figure 2 It is a sectional view of the collecting unit in the old powder collecting and recycling proportioning device for the 3D printer.

[0019] Figure 3 It is Figure 2 the enlarged schematic view of A in the middle.

[0020] Figure 4 It is Figure 2 the enlarged schematic view of B in the middle.

[0021] Figure 5 It is a partial structure sectional view of the slag discharging assembly in the old powder collecting and recycling proportioning device for the 3D printer.

[0022] Figure 6It is a sectional view of the discharging assembly of the old powder collecting and recycling proportioning device for the 3D printer.

[0023] Figure 7 It is a sectional view of the discharging assembly of the old powder collecting and recycling proportioning device for the 3D printer.

[0024] Figure 8 It is a structural view of the proportioning unit of the old powder collecting and recycling proportioning device for the 3D printer.

[0025] Figure 9 It is a structural view of the proportioning unit of the old powder collecting and recycling proportioning device for the 3D printer.

[0026] Figure 10 It is a sectional view of the proportioning unit of the old powder collecting and recycling proportioning device for the 3D printer.

[0027] Figure 11 It is a sectional view of the proportioning unit of the old powder collecting and recycling proportioning device for the 3D printer. Figure 10 It is an enlarged view of C in the middle. DETAILED DESCRIPTION

[0028] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0029] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein, that the present application can be practiced with other than the described embodiments, and that the present application can be practiced with different or additional components, elements, acts, or steps. Thus, the present application is not limited to the embodiments described herein but is instead broad in scope.

[0030] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments.

[0031] Thirdly, the present application is described in detail in combination with the schematic view. In the detailed description of the embodiments of the present application, the sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic view is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0032] Example 1, refer to Figure 1 Figure 5 ​For the first embodiment of the present application, a 3D printer old powder collection and recycling proportioning device is provided, which comprises a through hole 103a arranged in the rear inner wall of the powder laying groove 102, and the height of the through hole 103a is higher than the height of the powder laying scraper, so that the unused new powder can be prevented from entering the flow cavity 103b during the powder laying process to cause waste. A vacuum pump 103c is opened, and the vacuum pump 103c sucks out the gas in the operation table 101. It should be noted that a sliding window is arranged at the front part of the operation table 101, so that the powder laying groove 102 can be kept in a sealed state during the powder printing process, so that the vacuum pump 103c is opened to form a vacuum environment. Under the vacuum environment, the density of the gas becomes smaller, so that the powder is adsorbed and moved out of the powder laying groove 102 and enters the flow cavity 103b through the through hole 103a and enters the area of the pushing groove 104a.

[0033] Among them, the shunt rod 104b is driven by a motor, so as to drive the pushing plate 104c to rotate. The pushing plate 104c is provided with a small hole on the surface, which can make the gas flow generated by the vacuum pump 103c pass through the pushing plate 104c to produce suction in the powder laying groove 102. However, since the small hole is small, the powder will not cause the small hole to be blocked. The outer edge of the pushing plate 104c is attached to the inner wall of the pushing groove 104a, so that the powder entering the pushing groove 104a can only contact the pushing plate 104c. Under the strong suction capacity of the vacuum pump 103c, the powder continuously adheres to the pushing plate 104c. The motor drives the shunt rod 104b to rotate counterclockwise, so as to drive the powder to separate from the suction area of the vacuum pump 103c.

[0034] Further, the inner wall of the pushing groove 104a is provided with a conveying hole 105a transversely penetrating the operation table 101, the conveying hole 105a is connected with the pushing groove 104a, under the action of centrifugal force generated by the rotation of the shunt rod 104b, the powder will be thrown into the conveying hole 105a, both sides of the operation table 101 are provided with a storage box 201, the inside of the storage box 201 is provided with an old powder bin 202b at the rear position and a new powder bin 202a at the front position, the inside of the old powder bin 202b is transversely fixedly connected with a screening cylinder 202c, the surface of the screening cylinder 202c is provided with a plurality of small holes, the small holes only allow the powder to pass through, the diameter of the screening cylinder 202c is equal to that of the conveying hole 105a, and the other end of the screening cylinder 202c is aligned with one end of the output hole and fixedly connected together, the inside of the storage box 201 is provided with a motor 105b at the central position of the old powder bin 202b, the motor 105b drives a connecting rod 105c to rotate, the connecting rod 105c penetrates the screening cylinder 202c on one side, the output hole and the screening cylinder 202c on the other side, and is rotatably connected to the inner wall of the old powder bin 202b on the other side through a rotating shaft, and the outside of the connecting rod 105c is symmetrically provided with two groups of spiral plates 105d with the output hole as the center, one end of the spiral plate 105d is close to the inner wall of the old powder bin 202b, the spiral directions of the two groups of spiral plates 105d are opposite, the spiral plate 105d is a spiral structure, which is designed to rotate around the central axis of the connecting rod 105c, and the outside of the spiral plate 105d is attached to the inner wall of the output hole and the screening cylinder 202c, which makes the connecting rod 105c drive the two groups of spiral plates 105d to rotate simultaneously under the drive of the motor 105b, and generates a thrust in the opposite direction in the conveying hole 105a, so that the powder in the conveying hole 105a is pushed in two directions, so that the powder can move in the two directions of the output hole.

[0035] Further, under the pushing of the spiral plate 105d, the powder on both sides will be pushed into the area of the screening cylinder 202c, and as the spiral plate 105d continuously rotates, the powder will move on the inner wall of the screening cylinder 202c, the qualified powder will enter the inner wall of the old powder bin 202b through the small holes of the screening cylinder 202c, and the unqualified powder such as the agglomerated powder and impurities will continue to be pushed by the spiral plate 105d in the two directions.

[0036] The inner wall of the storage box 201 is provided with a slag discharge port 202d at one end of the screening cylinder 202c, and the slag discharge port 202d is adjacent to one end of the screening cylinder 202c. The unqualified powder is pushed by the spiral plate 105d, slides to one end of the screening cylinder 202c, and then slides downward into the slag discharge port 202d. Two “L”-shaped sliding grooves 202e are formed on the lower surface of the storage box 201. The receiving box 202f is slidably connected in the sliding groove 202e. The top of the receiving box 202f is provided with an opening, and the other surfaces are closed. When the receiving box 202f slides to the bottom of the sliding groove 202e, the opening position is aligned with the slag discharge port 202d. This makes the unqualified powder in the screening cylinder 202c that cannot be filtered will enter the receiving box 202f through the slag discharge port 202d for centralized processing. This solves the problem of manual processing and additional screening and storage devices after 3D printing. In addition, the lower side of the storage box 201 is inclined, so that the receiving box 202f will not move or separate under the action of external force.

[0037] Embodiment 2, refer to Figure 6 Figure 9 As a second embodiment of the present application, the difference between this embodiment and the first embodiment is that: the bottom of the new powder bin 202a and the old powder bin 202b is provided with an outlet 203b. A distribution groove 203c is formed below the outlet 203b in the interior of the storage box 201. The bottom of the storage box 201 is provided with an outlet 203d. The outlet 203b, the distribution groove 203c and the outlet 203d are in communication. The powder in the new powder bin 202a and the old powder bin 202b enters the distribution groove 203c through the outlet 203b for distribution. The distributed powder is collected through the outlet 203d by the existing conveying device into the Puwa scraper for powder paving.

[0038] ​The motor two 301b is arranged in the center of the distribution groove 203c inside the storage box 201, the output end of the motor two 301b is connected with a driven rod 301a, the other end of the driven rod 301a is rotatably connected to the inner wall of the distribution groove 203c through a rotating shaft, a rotating seat 301c is fixedly installed outside the driven rod 301a, an annular plate 301d is arranged outside the rotating seat 301c and rotatably connected in the distribution groove 203c, ten groups of new powder hoppers 302a and old powder hoppers 302b are arranged, respectively, on both sides of the annular plate 301d outside the rotating seat 301c and separated by the annular plate 301d, and openings are arranged outside the new powder hoppers 302a and the old powder hoppers 302b, powder enters the hoppers through the openings, limiting grooves 302c are arranged on the inner walls of the new powder hoppers 302a and the old powder hoppers 302b near the outside, and isolation plates 302d are slidably connected in the limiting grooves 302c, that is, ten groups of isolation plates 302d are arranged, the isolation plates 302d are in a rectangular shape, the outside near one side is in a hollow part, the outside near the other side is in a solid shape, and the solid part and the hollow part are matched with the opening part of the new powder hoppers 302a and the old powder hoppers 302b, so that the solid part of the isolation plate 302d can isolate the new powder hoppers 302a and the old powder hoppers 302b, the powder cannot enter the new powder hoppers 302a and the old powder hoppers 302b, but the hollow part can, and the isolation plate 302d penetrates through the annular plate 301d and slides between the new powder hoppers 302a and the old powder hoppers 302b.

[0039] In use, the new powder hopper 302a and the old powder hopper 302b are respectively provided with ten groups, and the matching ratio is ten equal parts. Before discharging, the new powder and the old powder are matched according to the needs. If the matching ratio of the new powder and the old powder is 1:9, only the entity part of one isolation plate 302d needs to be slid to the opening position of the old powder hopper 302b, and the entity parts of the remaining isolation plates 302d are slid to the opening part of the new powder hopper 302a. This realizes that only one new powder hopper 302a can pour in powder, and nine old powder hoppers 302b can pour in powder, thereby realizing the effect of 1:9 matching ratio. After the new powder hopper 302a and the old powder hopper 302b are distributed, the motor two 301b is controlled to rotate, driving the rotating seat 301c to rotate, and at the same time driving the new powder hopper 302a and the old powder hopper 302b to reverse and gradually align with the discharge port 203b of the new powder bin 202a and the old powder bin 202b. When the opening of the new powder hopper 302a is not blocked by the isolation plate 302d, the new powder will flow into the hopper. It needs to be explained that the outer surface of the new powder hopper 302a and the old powder hopper 302b is always attached to the inner wall of the distribution groove 203c. This makes the edge between the discharge port 203b and the distribution groove 203c scrape off the excess new powder in the new powder hopper 302a as the rotating seat 301c rotates. This realizes the effect that each hopper can contain an equal amount of powder. With the rotation of the rotating seat 301c by 180 degrees, the new powder hopper 302a and the old powder hopper 302b close to one side will enter the area of the discharge port first. Under the action of gravity, the powder in the hopper will separate from the new powder hopper 302a and the old powder hopper 302b and enter the discharge port, and then be sent to the existing conveying device for powder spreading work. Each time the powder is discharged, the motor two 301b drives the rotating seat 301c to rotate by 180 degrees, and then returns to the original position.

[0040] The remaining structure is the same as that of example 1.

[0041] Example 3, refer to Figure 10 Figure 11 This is the third embodiment of the application. The difference between this embodiment and the second embodiment is that an operation groove 303a is formed in one side surface of the storage box 201. The operation groove 303a is in the shape of a semicircular ring, and its size allows the operator to put his hand into it. Ten groups of adjustment grooves 303b are formed in the operation groove 303a and are connected transversely to the distribution groove 203c. A sliding seat 304b is slidably connected in the adjustment groove 303b through a sliding groove 304a. Two groups of springs 304e are arranged in the sliding seat 304b. A slide button 304c is connected with the springs 304e through the limiting blocks 304d arranged on both sides of the slide button 304c, so that the slide button 304c can be elastically connected in the sliding seat 304b. The ten groups of slide buttons 304c and the ten groups of isolation plates 302d are one-to-one aligned.

[0042] ​Further, the inner walls of the ten adjusting grooves 303b are provided with annular rotating ring grooves 303c, the outer walls of the rotating ring grooves 303c are provided with two limiting ring grooves 303d, the ten isolation plates 302d are provided with connecting blocks 303f, and the connecting blocks 303f are provided with fixing rings 303e, the width of the fixing ring 303e matches the width of the isolation plate 302d, and the fixing ring 303e is limited in the limiting ring groove 303d under the pressing of external force, so that the rotating seat 301c can drive the isolation plate 302d to rotate stably, and it should be noted that the isolation plate 302d is made of plastic and has a certain elasticity, and the isolation plate 302d will slightly bend inward under the pressing of external force, so that the fixing ring 303e moves inward through the connecting block 303f and will be separated from the limiting ring groove 303d.

[0043] In use, the new powder hopper 302a and the old powder hopper 302b need to be matched by rotating the isolation plate 302d, and the staff can put their hands into the operation groove 303a, press the slide button 304c above the isolation plate 302d that needs to be slid by hand, and apply downward pressure to the slide button 304c, so that the slide button 304c deforms the spring 304e and the lower side of the slide button 304c contacts the fixing ring 303e, the downward pressure on the slide button 304c is transmitted to the fixing ring 303e, so that the fixing ring 303e moves downward and separates from the limiting ring groove 303d where the fixing ring 303e is limited, and slides forward or backward to a position where it cannot slide any more, and the side of the isolation plate 302d abuts against the inner wall of the distribution groove 203c or the other side of the isolation plate 302d abuts against the inner wall of the limiting groove 302c of the new powder hopper 302a, which indicates that the matching of the new powder hopper 302a and the old powder hopper 302b of this group is completed, and the corresponding slide button 304c can be released, the slide button 304c moves upward under the stretching force of the spring 304e, the fixing ring 303e is reset under the elasticity of the isolation plate 302d and is limited in the limiting ring groove 303d directly above, and through such a design, the matching can be convenient and the stability of the matching ratio can be maintained.

[0044] The remaining structure is the same as that of example 2.

[0045] It is important to note that the construction and arrangement of the application shown in the various examples presented are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements can be altered or varied. Thus, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be varied or re-sequenced without materially affecting the application. Any "apparatus" or "device" described herein can be a structure that performs the recited function, not necessarily composed of all the means or elements specifically disclosed. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present application as expressed in the appended claims.

[0046] Also, for the purpose of providing a concise description of exemplary embodiments, not all features of an actual implementation can be described (i.e., those related to the

[0047] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, which should be covered by the claims of the present application.

Claims

1. A device for collecting and reusing used toner in a 3D printer, characterized in that: Including, Collecting unit (100), including operation platform (101), powder laying groove (102) arranged in the operation platform (101), powder suction assembly (103) arranged in the powder laying groove (102), and pushing assembly (104) arranged in the operation platform (101) and matched with powder suction assembly (103); Conveying unit (200), including storage box (201) arranged on both sides of the operation platform (101), slag discharge assembly (202) arranged in the storage box (201), and discharging assembly (203) arranged in the storage box (201); Proportioning unit (300), including rotating assembly (301) arranged in the storage box (201) and connected with discharging assembly (203), distribution assembly (302) arranged on the rotating assembly (301), limiting assembly (303) arranged outside the storage box (201) and connected with distribution assembly (302), and locking assembly (304) arranged outside the storage box (201); The powder suction assembly (103) includes a through hole (103a) arranged on the inner wall of the powder laying groove (102), a flow-through cavity (103b) arranged in the operation platform (101), and a vacuum pump (103c) arranged on the operation platform (101); The pushing assembly (104) includes a pushing groove (104a) arranged in the flow-through cavity (103b), a shunt rod (104b) arranged in the pushing groove (104a), and a pushing plate (104c) arranged outside the shunt rod (104b), and the outer edge of the pushing plate (104c) is attached to the inner wall of the pushing groove (104a); Further comprising conveying assembly (105), the conveying assembly (105) includes conveying hole (105a) arranged in the operation platform (101), motor one (105b) arranged on one side of the storage box (201), connecting rod (105c) arranged on the motor one (105b), and helical plate (105d) arranged outside the connecting rod (105c); Two groups of helical plates (105d) are arranged on the outer middle shaft of the connecting rod (105c) in mirror image, and the helical directions of the two groups of helical plates (105d) are opposite; The slag discharge assembly (202) includes new powder bin (202a) and old powder bin (202b) arranged in the storage box (201), screening cylinder (202c) arranged outside the conveying hole (105a) and located in the old powder bin (202b), slag discharge port (202d) arranged on one side of the old powder bin (202b), chute (202e) arranged on the lower side of the storage box (201), and storage box (202f) arranged in the chute (202e); The blanking assembly (203) comprises an injection port (203a) arranged on the upper portion of the material storage box (201) above the new powder bin (202a), a bin outlet (203b) arranged in the new powder bin (202a) and the old powder bin (202b), a distribution groove (203c) arranged in the material storage box (201), and a discharge port (203d) arranged on the inner wall of the distribution groove (203c); The bin outlet (203b), the distribution groove (203c) and the discharge port (203d) are in communication; The rotating assembly (301) comprises a driven rod (301a) arranged in the distribution groove (203c), a motor two (301b) arranged at one end of the driven rod (301a), a rotating seat (301c) arranged on the driven rod (301a), and an annular plate (301d) arranged on the outer side of the rotating seat (301c); The annular plate (301d) is rotatably connected to the distribution groove (203c); The distribution assembly (302) comprises a new powder hopper (302a) arranged on the outer side of the rotating seat (301c) in front of the annular plate (301d), an old powder hopper (302b) arranged on the outer side of the rotating seat (301c) behind the annular plate (301d), a limiting groove (302c) arranged on the new powder hopper (302a) and the old powder hopper (302b), and an isolation plate (302d) arranged in the limiting groove (302c); The new powder hopper (302a) and the old powder hopper (302b) are matched with the bin outlet (203b).

2. The used powder collecting and recycling proportioning device for 3D printer according to claim 1, characterized in that: The limiting assembly (303) comprises an operation groove (303a) arranged on one side of the material storage box (201), an adjusting groove (303b) arranged in the operation groove (303a) and in communication with the distribution groove (203c), a rotating ring groove (303c) arranged on the inner wall of the adjusting groove (303b), a limiting ring groove (303d) arranged on the inner wall of the rotating ring groove (303c), a fixed ring (303e) arranged in the limiting ring groove (303d), and a connecting block (303f) arranged on the isolation plate (302d); The fixed ring (303e) is fixedly connected to the outer side surface of the connecting block (303f).

3. The used powder collecting and recycling proportioning device for 3D printer according to claim 2, characterized in that: The locking assembly (304) comprises a sliding groove (304a) arranged on the inner side wall of the operation groove (303a) on both sides of the adjusting groove (303b), a sliding seat (304b) arranged in the sliding groove (304a), a sliding button (304c) arranged in the sliding seat (304b), a limiting block (304d) arranged on both sides of the sliding button (304c), and a spring (304e) arranged on the inner side of the limiting block (304d); The sliding button (304c) and the fixed ring (303e) are matched.

Images