CN114700248A

CN114700248A - 3D prints and uses powder shifter

Info

Publication number: CN114700248A
Application number: CN202210455907.1A
Authority: CN
Inventors: 谢大权; 施砺圆; 袁加蒙
Original assignee: Nanjing Chenglian Laser Technology Co Ltd
Current assignee: Nanjing Chenglian Laser Technology Co Ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-07-05
Anticipated expiration: 2042-04-27
Also published as: CN114700248B

Abstract

The invention provides a powder screening machine for 3D printing, which belongs to the technical field of 3D printing post-processing equipment and comprises a supporting base, wherein a connecting seat is arranged at the upper end of the supporting base, a limiting structure and a powder screening structure are arranged on the connecting seat, a positioning structure is arranged on the peripheral surface of the powder screening structure, a dust raising prevention structure is connected onto the powder screening structure, and a feeding structure is arranged at the upper end of the limiting structure. The invention solves the problems that the powder screening efficiency of the powder screening machine is greatly reduced, and the movement of the powder screening machine is generally carried by manpower or equipment, consumes time and labor and is inconvenient for the movement of the equipment because the powder in the powder screening machine for 3D printing can be raised, so that the powder after powder screening cannot be taken out immediately and needs to wait for a period of time.

Description

3D prints and uses powder shifter

The technical field is as follows:

the invention belongs to the technical field of 3D printing post-processing equipment, and particularly relates to a powder screening machine for 3D printing.

Background art:

the 3D printing apparatus is a mechanical apparatus produced based on the production of 3D printing technology, and 3D printing is realized by using a digital technology material printer, and is often used for manufacturing models in the fields of mold manufacturing, industrial design, and the like, and then is gradually used for directly manufacturing some products. The 3D printing method also comprises a plurality of post-processing procedures, wherein the post-processing procedures comprise the step of processing the powder collected after printing, and the powder is mainly sieved by a powder sieving machine.

Present 3D prints with powder shifter inside dust can be raised when the powder screening, and then can't take out powder behind the powder screening at once, need wait for a period, just can take out the powder behind the powder screening, greatly reduced the powder screening efficiency of powder shifter, the removal of powder shifter is generally carried by manual work or equipment simultaneously, consuming time power, the removal of the equipment of being not convenient for.

The invention content is as follows:

the invention provides a powder screening machine for 3D printing, which aims to solve the problems that the powder screening efficiency of the powder screening machine is greatly reduced, the movement of the powder screening machine is generally carried by manpower or equipment, time and labor are consumed, and the equipment is inconvenient to move because the powder after powder screening can not be taken out immediately after powder screening because the dust in the powder screening of the conventional powder screening machine for 3D printing is raised.

The embodiment of the invention provides a powder sieving machine for 3D printing, which comprises a supporting base, wherein a connecting seat is arranged at the upper end of the supporting base, a limiting structure and a powder sieving structure are arranged on the connecting seat, a positioning structure is arranged on the peripheral surface of the powder sieving structure, a dust-raising preventing structure is connected to the powder sieving structure, and a feeding structure is arranged at the upper end of the limiting structure.

Through adopting the above technical scheme, can directly the pushing equipment remove through supporting the base, it is very convenient to use, can produce a top-down wind field in the sieve powder structure through preventing the dust structure simultaneously, can effectually prevent the raise dust phenomenon that sieve powder in-process powder leads to, and then can directly open equipment after the sieve powder is accomplished and take out the powder, the sieve powder efficiency of equipment is greatly improved, also can prevent that operational environment receives the pollution on every side, location structure can guarantee to sieve the structural sieve cage of powder and can rotate in step simultaneously, the sieve powder effect of equipment has been guaranteed.

Further, the support base includes bottom plate, drum, cylinder and universal wheel, four drums of avris symmetry fixedly connected with of bottom plate, the upper end fixedly connected with cylinder of drum, the output of cylinder extends to the inboard fixedly connected with universal wheel of drum, the lower extreme opening of drum runs through the bottom plate.

Through adopting above-mentioned technical scheme, drive the lift of universal wheel through the cylinder, and then realize the removal and the stable placement of equipment.

Further, the connecting seat includes annular shell, annular plate, spring, plectane, guide bar and shock dynamo, the up end at the bottom plate is fixed to the annular shell, the upper end fixedly connected with annular plate of annular shell, equidistant fixedly connected with a plurality of springs of the up end of annular plate, the upper end fixedly connected with plectane of spring, equidistant guide bar that is provided with between plectane and the annular plate, the guide bar is located the inboard of spring.

Through adopting above-mentioned technical scheme, drive the vibrations of sieve powder structure through shock dynamo, and then realize the vibrations sieve powder of equipment.

Further, the guide rod comprises a sleeve and an inner rod, the sleeve is sleeved outside the inner rod, and one end of the sleeve and one end of the inner rod are respectively locked with the annular plate and the circular plate through lower nuts.

By adopting the technical scheme, the stability of the equipment during vibration is ensured through the telescopic movement of the inner rod in the sleeve.

Further, limit structure includes circular backup pad, threaded rod, pressure strip and last nut, circular backup pad sets up the top at the plectane, two threaded rods of both ends symmetry fixedly connected with about circular backup pad, be provided with the pressure strip on the threaded rod, the surperficial threaded connection of threaded rod has last nut, it is located the upper end of pressure strip to go up the nut.

Through adopting above-mentioned technical scheme, through the position of the nut adjustment pressure strip on the rotating, ensure to sieve the powder structure and compress tightly.

Furthermore, the powder sieving structure comprises a lower cover plate, an annular outer cover, a first steel ball, a rotating motor, connecting rods, a sieving cage, an upper cover plate and a second steel ball, wherein the lower cover plate is fixed on a circular support plate, the upper end of the lower cover plate is clamped with the annular outer cover, the edge of the lower cover plate is connected with the first steel balls in an equidistant rotating manner, the surfaces of the first steel balls are tangent to the lower end of the annular outer cover, the lower end of the rotating motor is fixed on the upper end surface of a circular plate, the upper end of the rotating motor is fixed on the lower end surface of the circular support plate, the output shaft of the rotating motor is connected with the lower cover plate in a rotating manner through a bearing, the output end of the rotating motor extends to the inner side of the annular outer cover and is symmetrically and fixedly connected with four connecting rods, the connecting rods are connected with the annular outer cover, a plurality of sieving cages are arranged above the annular outer cover, and adjacent sieving cages are clamped with each other, the bottom sieve cage is mutually clamped with the annular outer cover, the upper cover plate is fixed on the lower end face of the pressing plate, the upper cover plate is clamped at the top of the sieve cage, the edge of the upper cover plate is connected with a plurality of second steel balls in an equidistant rotating mode, and the surfaces of the second steel balls are tangent to the top sieve cage.

Through adopting above-mentioned technical scheme, it is rotatory to drive the annular dustcoat that the connecting rod is connected through the rotating electrical machines, and then drives the sieve cage that compresses tightly and rotate, has realized the rotary screen powder of equipment.

Further, location structure includes fixed block one, jack, fixed block two and bolt, fixed block one is fixed in the upper end of sieve cage outer peripheral face, set up the jack that link up from top to bottom on the fixed block one, the lower extreme at the sieve cage outer peripheral face is fixed to fixed block two, the lower terminal surface fixedly connected with bolt of fixed block two, the same fixed block one of upper end fixedly connected with of annular dustcoat outer peripheral face, the bolt corresponds with the jack and pegs graft.

Through adopting above-mentioned technical scheme, the screen cage of block is spacing with the grafting of jack through bolt, and then guarantees the synchronous rotation of screen cage, has improved the sieve powder effect of equipment.

Further, the dust-raising-preventing structure comprises a first communicating pipe, a first annular pipe, a first concave pipe, a first connecting pipe, a box body, a filter element, a second communicating pipe, a second annular pipe, a second concave pipe, a second connecting pipe and a fan, wherein the first communicating pipe is uniformly fixed on a circular supporting plate, one end of the first communicating pipe penetrates through a lower cover plate and extends to the inner side of an annular outer cover, an included angle between the first communicating pipe and the lower cover plate is 45 degrees, the other end of the first communicating pipe is communicated with the first annular pipe, the lower end of the first annular pipe is communicated with the first concave pipe, the right end of the first concave pipe is communicated with the first connecting pipe, the right end of the first connecting pipe is communicated with the box body, the filter element is clamped in the box body, the left side of the filter element is open, the second communicating pipe is uniformly fixed on an upper cover plate, one end of the second communicating pipe extends to the top of the inner side of the sieve cage, the included angle between the second communicating pipe and the upper cover plate is 45 degrees, the other end of the second communicating pipe is communicated with a second concave pipe, the top of the box body is communicated with a fan, and the fan and the second concave pipe are communicated with each other through a second connecting pipe.

Through adopting above-mentioned technical scheme, the structural fan of dust-raising prevention makes to produce a top-down wind field in the sieve powder structure, and then can prevent to sieve the powder in-process and produce the dust-raising, in order to ensure to open equipment directly and get the material, need not to stew and wait for, improved the sieve powder efficiency of equipment greatly, connect siphunculus one and connect siphunculus two simultaneously and all adopt 45 settings, and then guarantee that the air flow can be full of the sieve cage, also guaranteed the homogeneity in wind field.

Further, throw the material structure and include feeder hopper and valve, the feeder hopper is fixed on the pressure strip, the lower extreme of feeder hopper passes pressure strip and upper cover plate and extends to the top the inboard of sieve cage, be provided with the valve on the feeder hopper.

Through adopting above-mentioned technical scheme, the material is directly thrown to the accessible feeder hopper, and it is very convenient to use.

The beneficial effects of the invention are as follows:

1. according to the invention, a wind field from top to bottom is generated in the powder screening structure through the fan on the dust-raising-prevention structure, so that dust raising in the powder screening process can be prevented, the equipment can be directly opened for taking materials without standing and waiting, the powder screening efficiency of the equipment is greatly improved, meanwhile, the first communicating pipe and the second communicating pipe on the dust-raising-prevention structure are arranged at 45 degrees, the condition that the screen cage can be filled with air flow is ensured, and the uniformity of the wind field is also ensured.

2. According to the invention, through the arrangement of the supporting base, the air cylinder on the supporting base drives the universal wheels to lift, so that the movement and stable placement of equipment are realized.

3. According to the invention, through the arrangement of the positioning structure, the inserted pin on the positioning structure is inserted into the insertion hole to limit the clamped sieve cage, so that the synchronous rotation of the sieve cage is ensured, and the powder sieving effect of the equipment is improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.

Description of the drawings:

the accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic front view of an embodiment of the present invention;

FIG. 2 is a rear view of an embodiment of the present invention;

FIG. 3 is a schematic diagram of a sifter structure according to an embodiment of the present invention;

FIG. 4 is a schematic view of a support base according to an embodiment of the present invention;

FIG. 5 is a schematic view of a connecting socket according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a housing according to an embodiment of the invention;

reference numerals: 1. a support base; 2. a connecting seat; 3. a limiting structure; 4. a powder screening structure; 5. a positioning structure; 6. a dust-raising prevention structure; 7. a feeding structure; 11. a base plate; 12. a cylinder; 13. a cylinder; 14. a universal wheel; 21. an annular shell; 22. an annular plate; 23. a spring; 24. a circular plate; 25. a sleeve; 26. an inner rod; 27. vibrating a motor; 31. a circular support plate; 32. a threaded rod; 33. a compression plate; 34. screwing a nut; 41. a lower cover plate; 42. an annular outer cover; 43. steel balls I; 44. a rotating electric machine; 45. a connecting rod; 46. a screen cage; 47. an upper cover plate; 48. steel balls II; 51. a first fixing block; 52. a jack; 53. a second fixed block; 54. a bolt; 61. a first communicating pipe; 62. a first annular pipe; 63. a first concave pipe; 64. a first connecting pipe; 65. a box body; 66. a filter element; 67. a communicating pipe II; 68. a second annular pipe; 69. a second concave pipe; 610. a second connecting pipe; 611. a fan; 71. a feed hopper; 72. and (4) a valve.

The specific implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Referring to fig. 1-6, an embodiment of the present invention provides a powder sieving machine for 3D printing, including a supporting base 1, where the supporting base 1 includes a bottom plate 11, four cylinders 12, a cylinder 13 and a universal wheel 14, the sides of the bottom plate 11 are symmetrically and fixedly connected with the four cylinders 12, the upper end of the cylinder 12 is fixedly connected with the cylinder 13, the output end of the cylinder 13 extends to the inner side of the cylinder 12 and is fixedly connected with the universal wheel 14, the lower end of the cylinder 12 is open and penetrates through the bottom plate 11, the cylinder 13 drives the universal wheel 14 to ascend and descend, so as to realize the movement and stable placement of equipment, the upper end of the supporting base 1 is provided with a connecting seat 2, the connecting seat 2 includes an annular shell 21, an annular plate 22, springs 23, a circular plate 24, a guide rod and a vibration motor 27, the annular shell 21 is fixed on the upper end surface of the bottom plate 11, the upper end of the annular shell 21 is fixedly connected with the annular plate 22, the upper end surface of the annular plate 22 is fixedly connected with a plurality of springs 23 at equal intervals, the upper end of the spring 23 is fixedly connected with a circular plate 24, guide rods are arranged between the circular plate 24 and the annular plate 22 at equal intervals, the guide rods are positioned on the inner side of the spring 23, the vibration of the powder sieving structure 4 is driven by a vibration motor 27, further the vibration powder sieving of the equipment is realized, the guide rods comprise a sleeve 25 and an inner rod 26, the sleeve 25 is sleeved on the outer side of the inner rod 26, one end of the sleeve 25 and one end of the inner rod 26 are respectively locked with the annular plate 22 and the circular plate 24 through lower nuts, the stability of the equipment during vibration is ensured through the telescopic movement of the inner rod 26 in the sleeve 25, the connecting seat 2 is provided with a limiting structure 3 and a powder sieving structure 4, the limiting structure 3 comprises a circular support plate 31, a threaded rod 32, a pressing plate 33 and an upper nut 34, the circular support plate 31 is arranged above the circular plate 24, the left end and the right end of the circular support plate 31 are symmetrically and fixedly connected with two threaded rods 32, the pressing plate 33 is arranged on the threaded rod 32, the surface of the threaded rod 32 is in threaded connection with an upper nut 34, the upper nut 34 is positioned at the upper end of the pressing plate 33, the position of the pressing plate 33 is adjusted by rotating the upper nut 34 to ensure that the powder sieving structure 4 is pressed tightly, the powder sieving structure 4 comprises a lower cover plate 41, an annular outer cover 42, a steel ball I43, a rotating motor 44, a connecting rod 45, a sieve cage 46, an upper cover plate 47 and a steel ball II 48, the lower cover plate 41 is fixed on the circular supporting plate 31, the annular outer cover 42 is clamped at the upper end of the lower cover plate 41, the edge of the lower cover plate 41 is in equidistant rotating connection with a plurality of steel balls I43, the surface of the steel ball I43 is tangent to the lower end of the annular outer cover 42, the lower end of the rotating motor 44 is fixed on the upper end face of the circular plate 24, the upper end of the rotating motor 44 is fixed on the lower end face of the circular supporting plate 31, the output shaft of the rotating motor 44 is in rotatable connection with the lower cover plate 41 through a bearing, the output end of the rotating motor 44 extends to the inner side of the annular outer cover 42 and is symmetrically and fixedly connected with four connecting rods 45, connecting rod 45 links to each other with annular dustcoat 42, the top of annular dustcoat 42 is provided with a plurality of sieve cages 46, mutual block between the adjacent sieve cage 46, bottom sieve cage 46 and the mutual block of annular dustcoat 42, the lower terminal surface at pressure strip 33 is fixed to upper cover plate 47, the upper end block of top sieve cage 46 has upper cover plate 47, the equidistant rotation in edge of upper cover plate 47 is connected with two 48 of a plurality of steel balls, the surface of two 48 of steel balls is tangent with top sieve cage 46, it is rotatory to drive the annular dustcoat 42 that connecting rod 45 is connected through rotating electrical machines 44, and then it is rotatory to drive the sieve cage 46 that compresses tightly, the rotary sieve powder of equipment has been realized.

The outer peripheral face of sieve powder structure 4 is provided with location structure 5, location structure 5 includes fixed block one 51, jack 52, two 53 of fixed block and bolt 54, the upper end at sieve cage 46 outer peripheral face is fixed to fixed block one 51, jack 52 that link up about having seted up on fixed block one 51, the lower extreme at sieve cage 46 outer peripheral face is fixed to two 53 of fixed block, the lower terminal surface fixedly connected with bolt 54 of two 53 of fixed block, the same fixed block one 51 of upper end fixedly connected with of annular dustcoat 42 outer peripheral face, bolt 54 corresponds with jack 52 and pegs graft, peg graft through bolt 54 and jack 52 carries out spacingly with the sieve cage 46 of block, and then guarantee sieve cage 46's synchronous rotation, the sieve powder effect of equipment has been improved.

The dust-proof structure 6 is connected to the powder sieving structure 4, the dust-proof structure 6 comprises a first communicating pipe 61, a first annular pipe 62, a first concave pipe 63, a first connecting pipe 64, a box 65, a filter element 66, a second communicating pipe 67, a second annular pipe 68, a second concave pipe 69, a second connecting pipe 610 and a fan 611, the first communicating pipe 61 is uniformly fixed on the circular support plate 31, one end of the first communicating pipe 61 penetrates through the lower cover plate 41 and extends to the inner side of the annular outer cover 42, an included angle between the first communicating pipe 61 and the lower cover plate 41 is 45 degrees, the other end of the first communicating pipe 61 is communicated with the first annular pipe 62, the lower end of the first annular pipe 62 is communicated with the first concave pipe 63, the right end of the first concave pipe 63 is communicated with the first connecting pipe 64, the right end of the first connecting pipe 64 is communicated with the box 65, the filter element 66 is clamped in the box 65, the left side of the filter element 66 is opened, the second communicating pipe 67 is uniformly fixed on the upper cover plate 47, one end of the second communicating pipe 67 extends to the inner side of the top sieve cage 46, the included angle between the communicating pipe II 67 and the upper cover plate 47 is 45 degrees, the other end of the communicating pipe II 67 is communicated with the concave pipe II 69, the top of the box body 65 is communicated with the fan 611, the fan 611 and the concave pipe II 69 are communicated with each other through the connecting pipe II 610, the fan 611 on the dust-proof structure 6 enables the powder sieving structure 4 to generate a wind field from top to bottom, thereby preventing dust generated in the powder sieving process, ensuring that the equipment can be directly opened for taking materials without standing for waiting, greatly improving the powder sieving efficiency of the equipment, meanwhile, the communicating pipe I61 and the communicating pipe II 67 are arranged at 45 degrees, further ensuring that the air flows to fill the sieve cage 46, and ensuring the uniformity of the wind field, the feeding structure 7 is arranged at the upper end of the limiting structure 3, the feeding structure 7 comprises a feeding hopper 71 and a valve 72, the feeding hopper 71 is fixed on the pressing plate 33, the lower end of the feeding hopper 71 penetrates through the pressing plate 33 and the upper cover plate 47 and extends to the inner side of the top sieve cage 46, the feed hopper 71 is provided with a valve 72, so that the feed can be directly fed through the feed hopper 71, and the use is very convenient.

The implementation mode is specifically as follows: when the dust screening device is used, the plug pins 54 are correspondingly inserted into the insertion holes 52, the screen cages 46 are combined, the pressing plate 33 is sleeved on the threaded rod 32, the upper screw cap 34 is screwed on the threaded rod 32, the upper cover plate 47 at the lower end of the pressing plate 33 is tightly pressed on the screen cage 46 at the top through the upper screw cap 34, the fan 611 acts, the fan 611 enables a top-down wind field to be generated in the powder screening structure 4, powder is poured into the screen cages 46 through the feed hopper 71, the power supply of the device is switched on, the rotary motor 44 drives the annular outer cover 42 connected with the connecting rod 45 to rotate, the pressed screen cages 46 are further driven to rotate, synchronous rotation of the screen cages 46 is ensured under the action of the positioning structure 5, the powder screening effect of the device is improved, meanwhile, the vibration motor 27 drives the powder screening structure 4 to vibrate, powder is further screened through the screen cages 46 with different apertures, and dust generated in the powder screening process can be prevented under the action of the wind field, when powder after powder screening needs to be taken out, the upper screw cap 34 is rotated reversely to be taken down, the upper cover plate 47 connected with the lower end of the pressing plate 33 is taken down, the screen cage 46 can be directly opened to take the powder without standing and waiting, and the powder screening efficiency of the device is greatly improved.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a 3D prints and uses powder shifter, is including supporting base (1), its characterized in that, the upper end of supporting base (1) is provided with connecting seat (2), be provided with limit structure (3) and sieve powder structure (4) on connecting seat (2), the outer peripheral face of sieve powder structure (4) is provided with location structure (5), be connected with dustproof structure (6) on sieve powder structure (4), the upper end of limit structure (3) is provided with throws material structure (7).

2. The 3D printing powder shifter according to claim 1, wherein: support base (1) and include bottom plate (11), drum (12), cylinder (13) and universal wheel (14), four drums (12) of avris symmetry fixedly connected with of bottom plate (11), the upper end fixedly connected with cylinder (13) of drum (12), the output of cylinder (13) extends to inboard fixedly connected with universal wheel (14) of drum (12), the lower extreme opening of drum (12) runs through bottom plate (11).

3. The 3D printing powder shifter according to claim 1, wherein: connecting seat (2) are including annular shell (21), annular plate (22), spring (23), plectane (24), guide bar and shock dynamo (27), the up end at bottom plate (11) is fixed in annular shell (21), the upper end fixedly connected with annular plate (22) of annular shell (21), equidistant fixedly connected with a plurality of springs (23) of the up end of annular plate (22), the upper end fixedly connected with plectane (24) of spring (23), equidistant guide bar that is provided with between plectane (24) and annular plate (22), the guide bar is located the inboard of spring (23).

4. The 3D printing powder shifter according to claim 3, wherein: the guide rod comprises a sleeve (25) and an inner rod (26), the sleeve (25) is sleeved on the outer side of the inner rod (26), and one end of the sleeve (25) and one end of the inner rod (26) are respectively locked with the annular plate (22) and the circular plate (24) through lower nuts.

5. The powder shifter for 3D printing according to claim 1, wherein: limit structure (3) include circular backup pad (31), threaded rod (32), pressure strip (33) and last nut (34), circular backup pad (31) set up the top in plectane (24), two threaded rods (32) of the symmetry fixedly connected with in both ends about circular backup pad (31), be provided with pressure strip (33) on threaded rod (32), the surperficial threaded connection of threaded rod (32) has last nut (34), it is located the upper end of pressure strip (33) to go up nut (34).

6. The 3D printing powder shifter according to claim 1, wherein: sieve powder structure (4) are including apron (41), annular dustcoat (42), steel ball (43), rotating electrical machines (44), connecting rod (45), sieve cage (46), upper cover plate (47) and steel ball two (48) down, apron (41) are fixed on circular backup pad (31) down, the upper end block of apron (41) down has annular dustcoat (42), the edge of apron (41) is equidistant to rotate down and is connected with a plurality of steel ball (43), the surface of steel ball (43) is tangent with the lower extreme of annular dustcoat (42), the lower extreme of rotating electrical machines (44) is fixed on the up end of plectane (24), the upper end of rotating electrical machines (44) is fixed on the lower terminal surface of circular backup pad (31), the output shaft of rotating electrical machines (44) is connected through bearing rotation with apron (41) down, the output of rotating electrical machines (44) extends to the inboard symmetry fixedly connected with four connecting rods (45) of annular dustcoat (42) The utility model discloses a sieve cage, connecting rod (45) link to each other with annular dustcoat (42), the top of annular dustcoat (42) is provided with a plurality of sieve cages (46), and is adjacent mutual block between sieve cage (46), bottom sieve cage (46) and annular dustcoat (42) mutual block, the lower terminal surface at pressure strip (33), top are fixed in upper cover plate (47) the upper end block of sieve cage (46) has upper cover plate (47), the equidistant rotation in edge of upper cover plate (47) is connected with a plurality of steel balls two (48), the surface and the top of steel ball two (48) sieve cage (46) are tangent.

7. The powder shifter for 3D printing according to claim 6, wherein: location structure (5) are including fixed block one (51), jack (52), fixed block two (53) and bolt (54), the upper end at sieve cage (46) outer peripheral face is fixed in fixed block one (51), jack (52) that link up about having seted up on fixed block one (51), the lower extreme at sieve cage (46) outer peripheral face is fixed in fixed block two (53), the lower terminal surface fixedly connected with bolt (54) of fixed block two (53), the same fixed block one (51) of upper end fixedly connected with of annular dustcoat (42) outer peripheral face, bolt (54) correspond with jack (52) and peg graft.

8. The 3D printing powder shifter according to claim 6, wherein: the dust-raising-preventing structure (6) comprises a first communicating pipe (61), a first annular pipe (62), a first concave pipe (63), a first connecting pipe (64), a box body (65), a filter element (66), a second communicating pipe (67), a second annular pipe (68), a second concave pipe (69), a second connecting pipe (610) and a fan (611), wherein the first communicating pipe (61) is uniformly fixed on the circular support plate (31), one end of the first communicating pipe (61) penetrates through the lower cover plate (41) and extends to the inner side of the annular outer cover (42), an included angle between the first communicating pipe (61) and the lower cover plate (41) is 45 degrees, the other end of the first communicating pipe (61) is communicated with the first annular pipe (62), the lower end of the first annular pipe (62) is communicated with the first concave pipe (63), the right end of the first concave pipe (63) is communicated with the first connecting pipe (64), and the right end of the first connecting pipe (64) is communicated with the box body (65), the block has filter core (66) in box (65), the left side opening of filter core (66), connect two (67) evenly fixed on upper cover plate (47) of siphunculus, the one end that connects two (67) of siphunculus extends to the top the inboard of sieve cage (46), connect contained angle between two (67) of siphunculus and upper cover plate (47) to be 45, the other end switch-on that connects two (67) of siphunculus has concave type pipe two (69), the top switch-on of box (65) has fan (611), fan (611) and concave type pipe two (69) switch-on each other through connecting pipe two (610).

9. The 3D printing powder shifter according to claim 6, wherein: throw material structure (7) including feeder hopper (71) and valve (72), feeder hopper (71) are fixed on pressure strip (33), pressure strip (33) and upper cover plate (47) are passed and extend to the top to the lower extreme of feeder hopper (71) the inboard of sieve cage (46), be provided with valve (72) on feeder hopper (71).