Inductor brush cleaning device capable of brushing powder in large area

Abstract

The inductance brush cleaning device comprises a base, a transfer device, a pressing device, a cleaning device and a control device, the bottom of the transfer device is connected with the base, a transfer plate is arranged at the top of the transfer device, the pressing device is arranged on one side of the transfer device, and the pressing device comprises a lifting air cylinder and a pressing plate. The cleaning device is arranged on one side of the transfer device, the top of the cleaning device is connected with the control device, the cleaning device comprises a brush fixing plate, a brush sliding plate and a brush body, the top of the brush fixing plate is connected with one end of the control device, and an open groove is formed in the middle of the brush fixing plate; the brush sliding plate comprises an upper brush sliding plate and a lower brush sliding plate which are symmetrically arranged up and down, one end of the brush sliding plate is slidably connected with the brush fixing plate, the other end of the brush sliding plate is connected with the brush bodies, the upper brush bodies and the lower brush bodies brush the upper surface and the lower surface of the inductor during powder brushing, and powder is removed in the process that the inductor penetrates through the brushes.

Description

Technical Field

[0001] The utility model relates to the technical field of powder brushing devices, and more specifically, to an inductive brush cleaning device capable of brushing powder on a large area. Background Technique

[0002] An inductor is a component that can convert electrical energy into magnetic energy and store it. It includes a coil and a magnetic core. The magnetic core wraps the coil, and leads are formed by connecting a material piece to the outside of the coil. In the production of existing integrated inductor coils, processing processes such as winding, paint stripping, welding, bending, and cutting are required.

[0003] In the existing inductor production process, after die-casting, a large amount of dust will exist on the surface of the inductor coil and needs to be processed. Otherwise, it will affect the subsequent use of the inductor. The existing processing method is mainly manual powder brushing. The two sides of the inductor coil are brushed with a brush. The processing efficiency is low, and because the inductor is small, it is not easy to grasp. Workers are also very likely to damage the inductor during the process of grasping and cleaning the inductor, resulting in the scrapping of the inductor.

[0004] The utility model patent with the publication number of CN 220781458 U discloses an inductor powder brushing device, which realizes the purpose of automatically brushing and removing powder from the inductor through the cooperation of a rotating mechanism and a powder brushing mechanism, eliminates the need for manual powder removal, improves the work efficiency, and reduces the inductor scrapping rate.

[0005] However, the inductor designed above is placed on the fixture plates arranged on the four sides of the bottom plate. Although each of the four sides is responsible for the cyclic processes of loading, powder brushing, transfer, and being grasped respectively, the powder brushing mechanism can only brush the powder of the inductor on the fixture plate rotated to the corresponding side. The inductors that can be cleaned at one time are limited to one fixture plate, the cleaning efficiency is not high, and the transfer part is not a necessary process, so the overall efficiency of the machine is not high. Content of the Utility Model

[0006] In view of this, in order to solve the above problems, the utility model proposes an inductive brush cleaning device capable of brushing powder on a large area. By setting a cleaning device to clean a large area of inductors, and combining the two steps of transfer and cleaning into one, the inductors can be directly grasped after powder brushing, which improves the overall efficiency of the machine.

[0007] An inductive brush cleaning device capable of powder brushing on a large area, comprising a base 1, a transfer device 2, a pressing device 3, a cleaning device 4 and a control device 5, characterized in that: the bottom of the transfer device 2 is connected to the base 1, a transfer plate 21 is provided at the top of the transfer device 2, and the transfer plate 21 is used for loading inductors; the pressing device 3 is arranged on one side of the transfer device 2, the pressing device 3 includes a lifting cylinder 31 and a pressing plate 32, and the pressing plate 32 is controlled by the lifting cylinder 31 to press down to the transfer plate 21 for fixing the inductor; the cleaning device 4 is arranged on one side of the transfer device 2, the top of the cleaning device 4 is connected to the control device 5, and the control device 5 drives the cleaning device 4 to move back and forth along the length direction of the transfer plate 21 through the transfer plate 21 for cleaning the inductor; the cleaning device 4 includes a brush fixing plate 41, a brush sliding plate 42 and a brush body 43, the top of the brush fixing plate 41 is connected to one end of the control device 5, an opening groove 411 is provided in the middle of the brush fixing plate 41, the brush sliding plate 42 includes an upper brush sliding plate 42 and a lower brush sliding plate 42 which are symmetrically arranged up and down, the upper brush sliding plate 42 and the lower brush sliding plate 42 are symmetrically centered on the central axis of the opening groove 411, and the central axis of the opening groove 411 is on the same horizontal line as the transfer plate 21; one end of the brush sliding plate 42 is slidably connected to the brush fixing plate 41, and the other end of the brush sliding plate 42 is connected to the brush body 43. During powder brushing, the upper and lower brush bodies 43 are in interference fit with the inductor to brush the upper and lower surfaces of the inductor, so that the powder on the inductor is removed during the process of passing through the brush.

[0008] Further, through holes 412 are provided on the brush fixing plate 41 on both the upper and lower sides of the opening groove 411, waist-shaped grooves 422 corresponding to the through holes 412 are provided on both the upper brush sliding plate 42 and the lower brush sliding plate 42, the waist-shaped grooves 422 are arranged vertically, and the distance between the upper and lower brush sliding plates 42 is adjusted through the waist-shaped grooves 422, so that the distance between the upper and lower brushes is changed, and it can be applicable to inductors of different thicknesses.

[0009] Further, a plurality of first hollow grooves 211 are provided on the transfer plate 21, a coil holder 212 is provided on the upper surface of the first hollow groove 211 for clamping the inductor, and positioning blocks 213 are further provided on both sides of the first hollow groove 211 for positioning the positions of the coil holder 212 and the pressing plate 32.

[0010] Further, the pressing plate 32 is arranged directly above the transfer plate 21, a pressing plate frame 33 is provided around the pressing plate 32 for fixing the pressing plate 32, one end bottom surface of the pressing plate frame 33 is connected to the top of the lifting cylinder 31, and a cylinder fixing seat 34 is provided at the bottom of the lifting cylinder 31, and the cylinder fixing seat 34 is connected to the base 1.

[0011] Further, a plurality of second hollow grooves 322 are provided on the pressing plate 32. The second hollow grooves 322 correspond to the first hollow grooves 211 up and down. A clearance groove 323 extends from the side of the second hollow groove 322 for clearance with the positioning block 213 on the transfer plate 21.

[0012] Further, the control device 5 is arranged above the base 1 and on one side of the transfer device 2. The control device 5 includes a connecting rod 51, a transverse movement cylinder 52, a support plate 53 and a support column 54. The support column 54 is arranged on the base 1. A support plate 53 is provided above the support column 54. A transverse movement cylinder 52 is provided above the support plate 53. One end of the transverse movement cylinder 52 is connected to the connecting rod 51 above, and the other end of the connecting rod 51 is connected to the cleaning device 4 at the bottom. By moving the transverse movement cylinder 52 back and forth, the connecting rod 51 is driven to move, so that the cleaning device 4 brushes powder on the inductor.

[0013] Further, the control device 5 further includes a limiting device 55. The limiting device 55 is arranged at both ends of the transverse movement cylinder 52 for buffering and limiting when the transverse movement cylinder 52 reciprocates.

[0014] Further, the transfer device 2 further includes a vertical plate 22. The vertical plate 22 is arranged below both ends of the transfer plate 21. Grooves are provided at both ends of the top of the vertical plate 22. A cross bar 23 is arranged between the grooves of the two vertical plates 22 for supporting the bottom of the transfer plate 21.

[0015] Further, a reinforcing rib 24 is provided on the outer side of the vertical plate 22.

[0016] Further, a powder collecting device 6 is arranged below the transfer device 2. The powder collecting device 6 includes a transition box 61 and a powder collecting box 62. The transition box 61 is arranged between the inner side walls of the two vertical plates 22. The transition box 61 is in the shape of a funnel with openings at both the top and the bottom. The opening at the top of the transition box 61 is larger than the size of the transfer plate 21, which is convenient for collecting the brushed powder. The powder collecting box 62 is arranged below the transition box 61. The bottom of the powder collecting box 62 is connected to the base 1.

[0017] Advantages of the present utility model: The present utility model provides an inductive brush cleaning device capable of large-area powder brushing, which includes a base 1, a transfer device 2, a pressing device 3, a cleaning device 4, and a control device 5. The bottom of the transfer device 2 is connected to the base 1, and a transfer plate 21 is provided at the top of the transfer device 2 for loading inductors. The pressing device 3 is disposed on one side of the transfer device 2 and includes a lifting cylinder 31 and a pressing plate 32. The pressing plate 32 is controlled by the lifting cylinder 31 to press down onto the transfer plate 21 for fixing the inductor. The cleaning device 4 is disposed on one side of the transfer device 2, and the top of the cleaning device 4 is connected to the control device 5. The control device 5 drives the cleaning device 4 to move back and forth along the length direction of the transfer plate 21 through the transfer plate 21 for cleaning the inductor. The cleaning device 4 includes a brush fixing plate 41, a brush sliding plate 42, and a brush body 43. The top of the brush fixing plate 41 is connected to one end of the control device 5. An opening groove 411 is provided in the middle of the brush fixing plate 41. The brush sliding plate 42 includes an upper brush sliding plate 42 and a lower brush sliding plate 42 that are symmetrically arranged up and down. The upper brush sliding plate 42 and the lower brush sliding plate 42 are symmetrically centered on the central axis of the opening groove 411, and the central axis of the opening groove 411 is on the same horizontal line as the transfer plate 21. One end of the brush sliding plate 42 is slidably connected to the brush fixing plate 41, and the other end of the brush sliding plate 42 is connected to the brush body 43. During powder brushing, the upper and lower brush bodies 43 are in interference fit with the inductor to brush the upper and lower surfaces of the inductor, so that the powder on the inductor is removed during the process of passing through the brush. The inductor after powder removal can be directly clamped for the next step. Description of the Drawings

[0018] Figure 1 It is the overall structure diagram of the inductive brush cleaning device capable of large-area powder brushing of the present utility model.

[0019] Figure 2 It is the elevation view of the cleaning device of the inductive brush cleaning device capable of large-area powder brushing of the present utility model.

[0020] Figure 3 It is the partial structure diagram of the inductive brush cleaning device capable of large-area powder brushing of the present utility model.

[0021] Figure 4 It is the plan view of the transfer plate of the inductive brush cleaning device capable of large-area powder brushing of the present utility model.

[0022] Figure 5 It is the partial top view of the inductive brush cleaning device capable of large-area powder brushing of the present utility model.

[0023] Figure 6 It is the partial structure diagram of the inductive brush cleaning device capable of large-area powder brushing of the present utility model.

[0024] Figure 7 The connection structure diagram of the control device and the cleaning device of the inductive brush cleaning device capable of large-area powder brushing of the present utility model.

[0025] Description of main component symbols

[0026] Base 1, transfer device 2, transfer plate 21, first hollow groove 211, coil holder 212, positioning block 213, vertical plate 22, horizontal bar 23, reinforcing rib 24, pressing device 3, lifting cylinder 31, pressing plate 32, second hollow groove 322, avoidance groove 323, pressing plate frame 33, cylinder fixing seat 34, cleaning device 4, brush fixing plate 41, opening groove 411, opening hole 412, brush sliding plate 42, waist-shaped groove 422, brush body 43, control device 5, connecting rod 51, transverse movement cylinder 52, support plate 53, support column 54, limiting device 55, powder collection device 6, transition box 61, powder collection box 62.

[0027] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific embodiments

[0028] As Figure 1 shown, it is the overall structure diagram of the inductive brush cleaning device capable of large-area powder brushing of the present utility model; as Figure 2 shown, it is the elevation view of the cleaning device of the inductive brush cleaning device capable of large-area powder brushing of the present utility model; as Figure 3 shown, it is the partial structure diagram of the inductive brush cleaning device capable of large-area powder brushing of the present utility model; as Figure 4 shown, it is the plan view of the transfer plate of the inductive brush cleaning device capable of large-area powder brushing of the present utility model; as Figure 5 shown, it is the partial top view of the inductive brush cleaning device capable of large-area powder brushing of the present utility model; as Figure 6 shown, it is the partial structure diagram of the inductive brush cleaning device capable of large-area powder brushing of the present utility model; as Figure 7 shown, it is the connection structure diagram of the control device and the cleaning device of the inductive brush cleaning device capable of large-area powder brushing of the present utility model. Embodiment 1:

[0029] An inductance brush cleaning device capable of powder brushing on a large area, comprising a base 1, a transfer device 2, a pressing device 3, a cleaning device 4 and a control device 5, characterized in that: the bottom of the transfer device 2 is connected to the base 1, a transfer plate 21 is provided at the top of the transfer device 2, and the transfer plate 21 is used for loading inductors; the pressing device 3 is arranged on one side of the transfer device 2, the pressing device 3 includes a lifting cylinder 31 and a pressing plate 32, and the pressing plate 32 is controlled by the lifting cylinder 31 to press down to the transfer plate 21 for fixing the inductor; the cleaning device 4 is arranged on one side of the transfer device 2, the top of the cleaning device 4 is connected to the control device 5, and the control device 5 drives the cleaning device 4 to move back and forth along the length direction of the transfer plate 21 through the transfer plate 21 for cleaning the inductor; the cleaning device 4 includes a brush fixing plate 41, a brush sliding plate 42 and a brush body 43, the top of the brush fixing plate 41 is connected to one end of the control device 5, an opening groove 411 is provided in the middle of the brush fixing plate 41, the brush sliding plate 42 includes an upper brush sliding plate 42 and a lower brush sliding plate 42 which are symmetrically arranged up and down, the upper brush sliding plate 42 and the lower brush sliding plate 42 are centered on the central axis of the opening groove 411, and the central axis of the opening groove 411 is on the same horizontal line as the transfer plate 21; one end of the brush sliding plate 42 is slidably connected to the brush fixing plate 41, and the other end of the brush sliding plate 42 is connected to the brush body 43. During powder brushing, the upper and lower brush bodies 43 are in interference fit with the inductor to brush the upper and lower surfaces of the inductor, so that the powder on the inductor is removed during the process of passing through the brush.

[0030] The brush is a wool brush and can withstand a high temperature of 200 °C.

[0031] Open holes 412 are provided on the brush fixing plate 41 on both the upper and lower sides of the opening groove 411, waist-shaped grooves 422 corresponding to the open holes 412 are provided on both the upper brush sliding plate 42 and the lower brush sliding plate 42, the waist-shaped grooves 422 are arranged vertically, and the distance between the upper and lower brush sliding plates 42 is adjusted through the waist-shaped grooves 422, so that the distance between the upper and lower brushes is changed, and it can be applicable to inductors of different thicknesses.

[0032] A plurality of first hollow grooves 211 are provided on the transfer plate 21, a coil holder 212 is provided on the upper surface of the first hollow groove 211 for clamping the inductor, and positioning blocks 213 are further provided on both sides of the first hollow groove 211 for positioning the positions of the coil holder 212 and the pressing plate 32.

[0033] The pressing plate 32 is arranged directly above the transfer plate 21, a pressing plate frame 33 is provided around the pressing plate 32 for fixing the pressing plate 32, one end bottom surface of the pressing plate frame 33 is connected to the top of the lifting cylinder 31, a cylinder fixing seat 34 is provided at the bottom of the lifting cylinder 31, and the cylinder fixing seat 34 is connected to the base 1.

[0034] A plurality of second hollow grooves 322 are provided on the pressing plate 32. The second hollow grooves 322 correspond to the first hollow grooves 211 up and down. A clearance groove 323 extends from the side of the second hollow groove 322 for clearance with the positioning block 213 on the transfer plate 21.

[0035] The pressing plate 32 is made of non-magnetic stainless steel.

[0036] The control device 5 is arranged above the base 1 and on one side of the transfer device 2. The control device 5 includes a connecting rod 51, a transverse movement cylinder 52, a support plate 53 and a support column 54. The support column 54 is arranged on the base 1. A support plate 53 is arranged above the support column 54. A transverse movement cylinder 52 is arranged above the support plate 53. One end of the transverse movement cylinder 52 is connected to the connecting rod 51 above, and the other end of the connecting rod 51 is connected to the bottom of the cleaning device 4. By moving the transverse movement cylinder 52 back and forth, the connecting rod 51 is driven to move, so that the cleaning device 4 brushes powder on the inductor.

[0037] The control device 5 further includes a limiting device 55. The limiting device 55 is arranged at both ends of the transverse movement cylinder 52 for buffering and limiting when the transverse movement cylinder 52 reciprocates.

[0038] The transfer device 2 further includes a vertical plate 22. The vertical plate 22 is arranged below both ends of the transfer plate 21. Grooves are provided at both ends of the top of the vertical plate 22. A cross bar 23 is arranged between the grooves of the two vertical plates 22 for supporting the bottom of the transfer plate 21.

[0039] Reinforcing ribs 24 are provided on the outer side of the vertical plate 22.

[0040] A powder collection device 6 is arranged below the transfer device 2. The powder collection device 6 includes a transition box 61 and a powder collection box 62. The transition box 61 is arranged between the inner side walls of the two vertical plates 22. The transition box 61 is in the shape of a funnel with openings at the top and bottom. The opening at the top of the transition box 61 is larger than the size of the transfer plate 21, which is convenient for collecting the brushed powder. The powder collection box 62 is arranged below the transition box 61. The bottom of the powder collection box 62 is connected to the base 1.

[0041] Advantages of the present utility model: The present utility model provides an inductance brush cleaning device capable of large-area powder brushing, which includes a base 1, a transfer device 2, a pressing device 3, a cleaning device 4, and a control device 5. The bottom of the transfer device 2 is connected to the base 1, and a transfer plate 21 is provided at the top of the transfer device 2 for loading inductors. The pressing device 3 is arranged on one side of the transfer device 2 and includes a lifting cylinder 31 and a pressing plate 32. The pressing plate 32 is controlled by the lifting cylinder 31 to press down onto the transfer plate 21 for fixing the inductor. The cleaning device 4 is arranged on one side of the transfer device 2, and the top of the cleaning device 4 is connected to the control device 5. The control device 5 drives the cleaning device 4 to move back and forth along the length direction of the transfer plate 21 through the transfer plate 21 for cleaning the inductor. The cleaning device 4 includes a brush fixing plate 41, a brush sliding plate 42, and a brush body 43. The top of the brush fixing plate 41 is connected to one end of the control device 5. An opening groove 411 is provided in the middle of the brush fixing plate 41. The brush sliding plate 42 includes an upper brush sliding plate 42 and a lower brush sliding plate 42 which are symmetrically arranged up and down. The upper brush sliding plate 42 and the lower brush sliding plate 42 are centered on the central axis of the opening groove 411, and the central axis of the opening groove 411 is on the same horizontal line as the transfer plate 21. One end of the brush sliding plate 42 is slidably connected to the brush fixing plate 41, and the other end of the brush sliding plate 42 is connected to the brush body 43. During powder brushing, the upper and lower brush bodies 43 are in interference fit with the inductor to brush the upper and lower surfaces of the inductor, so that the powder on the inductor is removed during the process of passing through the brush. The inductor after powder removal can be directly clamped for the next step.

[0042] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.

Claims

1. An inductive brush cleaning device capable of brushing powder over a large area, comprising a base (1), a transfer device (2), a pressing device (3), a cleaning device (4) and a control device (5), characterized in that: The bottom of the transfer device (2) is connected to the base (1), and the top of the transfer device (2) is provided with a transfer plate (21), and the transfer plate (21) is used to load the inductor. The pressing device (3) is arranged on one side of the transfer device (2), and the pressing device (3) comprises a lifting cylinder (31) and a pressing plate (32). The lifting cylinder (31) controls the pressing plate (32) to be pressed down to the transfer plate (21) to fix the inductor. The cleaning device (4) is arranged on one side of the transfer device (2), and the top of the cleaning device (4) is connected to the control device (5). The control device (5) drives the cleaning device (4) to pass through the transfer plate (21) and make a reciprocating motion along the length direction of the transfer plate (21) to clean the inductor. The cleaning device (4) comprises a brush fixing plate (41), a brush sliding plate (42), and a brush body (43). The top of the brush fixing plate (41) is connected to one end of the control device (5), an open groove (411) is provided in the middle of the brush fixing plate (41), the brush sliding plate (42) comprises an upper brush sliding plate (42) and a lower brush sliding plate (42) which are symmetrically arranged up and down, the upper brush sliding plate (42) and the lower brush sliding plate (42) are symmetrically centered about the central axis of the open groove (411), the central axis of the open groove (411) and the transfer plate (21) are located on the same horizontal line, one end of the brush sliding plate (42) is slidably connected to the brush fixing plate (41), and the other end of the brush sliding plate (42) is connected to a brush body (43), and when brushing powder, the upper and lower brush bodies (43) are both interference-fitted with the inductor, brushing the upper and lower surfaces of the inductor, so that the powder is removed from the inductor in the process of passing through the brush.

2. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 1, characterized in that: The brush fixing plates (41) on the upper and lower sides of the opening groove (411) are both provided with opening holes (412); the upper brush sliding plate (42) and the lower brush sliding plate (42) are both provided with waist-shaped grooves (422) corresponding to the opening holes (412); the waist-shaped grooves (422) are arranged vertically; the distance between the upper and lower brush sliding plates (42) is adjusted by the waist-shaped grooves (422), thereby changing the distance between the upper and lower brushes, and the invention can be applied to inductors of different thicknesses.

3. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 1, characterized in that: The transfer plate (21) is provided with a plurality of first hollow grooves (211), the upper surfaces of the first hollow grooves (211) are provided with coil frames (212) for clamping the inductor, and positioning blocks (213) are also provided on both sides of the first hollow grooves (211) for positioning the coil frames (212) and the pressing plate (32).

4. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 1, characterized in that: The pressing plate (32) is arranged directly above the transfer plate (21). A pressing plate frame (33) is arranged around the pressing plate (32) for fixing the pressing plate (32). The bottom surface of one end of the pressing plate frame (33) is connected to the top of the lifting cylinder (31). The bottom of the lifting cylinder (31) is provided with a cylinder fixing seat (34), and the cylinder fixing seat (34) is connected to the base (1).

5. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 1, characterized in that: The pressing plate (32) is provided with a plurality of second hollow grooves (322), the second hollow grooves (322) corresponding to the first hollow grooves (211) in upper and lower positions, and the side edges of the second hollow grooves (322) are provided with avoidance grooves (323) for avoiding the positioning blocks (213) on the transfer plate (21).

6. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 1, characterized in that: The control device (5) is arranged above the base (1) and located on one side of the transfer device (2). The control device (5) comprises a connecting rod (51), a transverse cylinder (52), a support plate (53) and a support column (54). The support column (54) is arranged on the base (1). A support plate (53) is arranged above the support column (54). A transverse cylinder (52) is arranged above the support plate (53). The connecting rod (51) is connected to the top of one end of the transverse cylinder (52). The bottom of the other end of the connecting rod (51) is connected to the cleaning device (4). The transverse cylinder (52) moves back and forth, driving the connecting rod (51) to move, so that the cleaning device (4) brushes powder on the inductor.

7. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 1, characterized in that: The control device (5) further comprises a limiting device (55), wherein the limiting device (55) is arranged at both ends of the transverse cylinder (52) and is used to buffer and limit the reciprocating motion of the transverse cylinder (52).

8. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 1, characterized in that: The transfer device (2) further comprises a vertical plate (22), wherein the vertical plate (22) is arranged below the two ends of the transfer plate (21), the two ends of the top of the vertical plate (22) are provided with grooves, and a horizontal bar (23) is provided between the grooves between the two vertical plates (22) for supporting the bottom of the transfer plate (21).

9. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 8, characterized in that: The outer side edge of the vertical plate (22) is provided with a reinforcing rib (24).

10. The inductive brush cleaning device capable of brushing powder over a large area as claimed in claim 8, characterized in that: A powder collecting device (6) is provided below the transfer device (2), and the powder collecting device (6) comprises a transition box (61) and a powder collecting box (62). The transition box (61) is provided between the inner side walls of the two vertical plates (22), and the transition box (61) is in the shape of a funnel with upper and lower openings. The opening at the top of the transition box (61) is larger than the size of the transfer plate (21), so as to facilitate the collection of powder that has fallen off. The powder collecting box (62) is provided below the transition box (61), and the bottom of the powder collecting box (62) is connected to the base (1).

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