A fully automatic powder suction device

Abstract

The present invention relates to the field of 3D printing technology, specifically to a fully automatic powder suction device, including a sealing cover connected to a molding bin through a lift, and also including: an outer tube, the outer tube including a first outer transverse tube fixed to the output end of a dual-axis mobile platform in a horizontal direction; a plurality of suction and blowing holes, the plurality of suction and blowing holes are equally spaced and arranged at the bottom of the first outer transverse tube; an inner tube, the inner tube is fixed in the outer tube; a suction and blowing pipeline switching mechanism, the suction and blowing pipeline switching mechanism is arranged outside the molding bin; two fixed tubes, the two fixed tubes are respectively fixed to the inner sides of the sealing cover. The present invention can switch the suction and blowing states of the outer tube and the inner tube through the suction and blowing pipeline switching mechanism, thereby realizing the two forms of suction and blowing holes blowing air, suction and blowing nozzle sucking powder, or suction and blowing holes sucking powder, and suction and blowing nozzle blowing air, and thus can blow up and suck away the powder on the surface of the substrate and the workpiece in all directions, with good cleaning effect, no dead angles, and greatly improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printing, in particular to a fully automatic powder suction device. Background Art

[0002] 3D printing, also known as three-dimensional printing or additive manufacturing technology, is a technology that manufactures physical parts by adding materials layer by layer based on three-dimensional CAD data. The commonly used 3D printing technology is powder bed fusion (PBF), which melts powder materials through laser or electron beam and is suitable for a variety of materials, including metals and plastics.

[0003] After printing is completed, the inside of the molding cylinder, the surface of the substrate, and the surface of the workpiece will be covered with a large amount of powder, so before taking out the workpiece, it is necessary to absorb the powder. The existing powder absorption method is to transfer the molding cylinder, the substrate and the workpiece in the molding cylinder to the powder absorption device, and the sealing cover above the molding cylinder is lowered to seal the molding cylinder; after the inert gas is filled into the sealing cover, the powder absorption port moves along the surface of the workpiece and the substrate to absorb the powder, and the pulse transmitter impacts the workpiece surface until the powder on the surface of the workpiece and the substrate is completely absorbed.

[0004] However, during the powder suction process, it was found that since the pulse transmitter was fixed in a sealed cover and could not be moved, powder was easily left in dead corners that could not be impacted, requiring additional cleaning, resulting in low work efficiency. For this reason, we proposed a fully automatic powder suction device to effectively solve the above-mentioned drawbacks. Summary of the invention

[0005] The object of the present invention is to provide a fully automatic powder suction device to solve the problems raised in the above background technology.

[0006] The present invention is realized by the following technical scheme: a fully automatic powder suction device, comprising a sealing cover connected to a molding bin through a lift, wherein the lower end of the sealing cover is open and located directly above the molding cylinder, and further comprising:

[0007] A dual-axis movable platform, wherein the dual-axis movable platform is installed on the inner top of the sealing cover;

[0008] The outer tube includes a first outer transverse tube fixed to the output end of the dual-axis mobile platform in the horizontal direction, the two ends of the first outer transverse tube are conductively connected to the outer vertical tubes, and the lower ends of the outer vertical tubes are conductively connected to the second outer transverse tubes; the second outer transverse tubes, the outer vertical tubes and the first outer transverse tubes cooperate with each other to form a boss shape;

[0009] A plurality of suction and blowing holes, wherein the plurality of suction and blowing holes are evenly spaced and arranged at the bottom of the first outer transverse tube;

[0010] An inner tube, wherein the inner tube is fixed inside the outer tube, the gap between the inner tube and the outer tube forms an annular cavity, and each suction and blowing hole is in conduction with the annular cavity; the inner tube comprises a first inner transverse tube arranged in the first outer transverse tube in the horizontal direction, inner vertical tubes are conductively connected at both ends of the first inner transverse tube, and second inner transverse tubes are conductively connected at the lower end of each inner vertical tube, and each second inner transverse tube is fixed in the corresponding second outer transverse tube and extends in the horizontal direction to the outside of the second outer transverse tube;

[0011] Four suction and blowing nozzles, the four suction and blowing nozzles are evenly distributed outside the two second outer transverse tubes and are connected to the corresponding second inner transverse tubes;

[0012] A suction and blowing pipeline switching mechanism, wherein the suction and blowing pipeline switching mechanism is arranged outside the molding chamber, and the annular cavity is connected to the suction and blowing pipeline switching mechanism through a hose;

[0013] Two fixed tubes are respectively fixed on two inner sides of the sealing cover, each fixed tube is movably inserted into the corresponding second inner transverse tube along the horizontal direction, and one of the fixed tubes is connected with the suction and blowing pipeline switching mechanism through a hose.

[0014] Optionally, the upper end of the suction-blowing nozzle is conductively connected to a conduit via a hose, and the conduit is fixed on the second outer transverse tube in a vertical direction and conductively connected to the second inner transverse tube;

[0015] A rotating shaft is fixed on the front and rear sides of the suction and blowing nozzle, a mounting plate is fixed on the front and rear sides of the conduit, a sleeve is fixed on each mounting plate, and each rotating shaft rotates in a corresponding sleeve.

[0016] Optionally, a torsion spring is arranged in the sleeve, one torsion arm of each torsion spring is connected to the corresponding sleeve, and the other torsion arm of each torsion spring is connected to the corresponding rotating shaft, so as to keep the suction and blowing nozzle in a vertical state.

[0017] Optionally, a baffle rod located directly below the two second outer transverse tubes is fixed in the sealing cover, the axis of each baffle rod is perpendicular to the axis of the second outer transverse tube, and each baffle rod is located between the corresponding two suction and blowing nozzles;

[0018] When the outer tube moves to the left or right to a limit position, the corresponding suction and blowing nozzle is placed in an inclined state through the stop rod.

[0019] Optionally, the fixed tube is provided with first through holes corresponding to the two corresponding conduits one by one, and the fixed tube is provided with a second through hole located between the two first through holes;

[0020] When the suction-blowing nozzle is in a vertical state, each first through hole is aligned with the corresponding conduit; when the suction-blowing nozzle is in an inclined state, each first through hole is staggered with the corresponding conduit, and the second through hole is aligned with the corresponding conduit.

[0021] Optionally, two movable sleeves are sleeved on the first outer transverse tube, and a moving assembly for moving the two movable sleeves away from and towards each other is provided on the output end of the dual-axis moving platform;

[0022] A plurality of through openings are evenly distributed at the bottom of each movable sleeve, the distance between two adjacent through openings is the same as the distance between two adjacent suction and blowing holes, and the number of the through openings is less than the number of the suction and blowing holes.

[0023] Optionally, two fixing rods are fixed in parallel and at intervals on the top of the first outer transverse tube, and the upper end of each fixing rod is fixed to the output end of the dual-axis movable platform;

[0024] The moving assembly includes a cylinder installed at the output end of the dual-axis moving platform, the output end of the cylinder is connected to a moving block, and each fixed rod moves through the moving block in a vertical direction; a connecting rod is hinged at the top of each movable sleeve, and the free end of each connecting rod is hinged to the moving block.

[0025] Optionally, the suction and blowing pipeline switching mechanism includes a fixed shell arranged outside the molding bin, the upper end of the fixed shell is open, a turntable is rotatably connected inside the fixed shell, and a servo motor connected to the turntable is installed on the outer bottom of the fixed shell;

[0026] A first connecting pipe and a second connecting pipe are fixedly connected to the bottom of the fixed shell, the first connecting pipe is communicated with the annular cavity through a hose, and the second connecting pipe is communicated with the fixed pipe through a hose;

[0027] A powder suction pipe and an air blowing pipe are fixed inside the rotating disk, and both the powder suction pipe and the air blowing pipe extend to the outside of the fixed shell in a vertical direction.

[0028] Optionally, when the powder suction pipe is aligned with the first connecting pipe and the air blowing pipe is aligned with the second connecting pipe, the suction and blowing hole sucks powder and the suction and blowing nozzle blows air; when the powder suction pipe is aligned with the second connecting pipe and the air blowing pipe is aligned with the first connecting pipe, the suction and blowing hole blows air and the suction and blowing nozzle sucks powder.

[0029] Optionally, an air pump and a filter are provided outside the molding bin, the air inlet end of the air pump is connected to the air outlet end of the filter through a pipe, the air outlet end of the air pump is connected to the air blowing pipe through a hose, and the powder inlet end of the filter is connected to the powder suction pipe through a hose.

[0030] Compared with the prior art, the present invention provides a fully automatic powder suction device, which has the following beneficial effects:

[0031] 1. The present invention arranges an outer tube, a suction and blowing hole, an inner tube, a suction and blowing nozzle and a suction and blowing pipeline switching mechanism. When the dual-axis movable platform drives the outer tube to move forward and backward and left and right, the suction and blowing pipeline switching mechanism can switch the suction and blowing states of the outer tube and the inner tube, thereby realizing the suction and blowing holes for blowing air and the suction and blowing nozzle for sucking powder, or the suction and blowing holes for sucking powder and the suction and blowing nozzle for blowing air. Therefore, the powder on the surface of the substrate and the workpiece can be blown up and sucked away in all directions, the cleaning effect is good, dead angles are not easy to exist, and the work efficiency is greatly improved.

[0032] 2. The present invention configures both the outer tube and the inner tube to be in a boss shape, which can be close to the workpiece and the substrate, and thus can clean the surface of the workpiece and the substrate well, with a better cleaning effect.

[0033] 3. The present invention is provided with a conduit, a rotating shaft, a sleeve, a torsion spring and a stopper. Under normal conditions, the suction and blowing nozzle is in a vertical state under the action of the torsion spring, so that the suction and blowing nozzle can be sucked or blown in the vertical direction. When the outer tube moves to the left or right to the limit position, the stopper can drive the corresponding suction and blowing nozzle to tilt, so that air can be blown to the angle between the workpiece and the substrate, or to the angle between the substrate and the forming cylinder, so that the powder at the angle can be lifted up and is not easy to remain at the angle, thereby greatly improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the present invention;

[0035] Figure 2 It is a structural schematic diagram of the inner tube of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the suction and blowing pipeline switching mechanism of the present invention;

[0037] Figure 4 It is a structural schematic diagram of the outer tube of the present invention;

[0038] Figure 5 for Figure 4 A local enlarged schematic diagram of the middle A;

[0039] Figure 6 This is a structural schematic diagram of state 1 of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of the second state of the present invention;

[0041] Figure 8 This is a schematic diagram of the structure of state three of the present invention;

[0042] Fig. 9 This is a structural schematic diagram of state 4 of the present invention;

[0043] Fig.10It is a schematic diagram of the suction and blowing hole of the present invention in a powder suction state;

[0044] Fig.11 It is a schematic diagram of the suction and blowing hole of the present invention in a blowing state;

[0045] Fig.12 It is a schematic diagram of the suction-blowing nozzle of the present invention in a vertical state;

[0046] Fig.13 It is a schematic diagram of the suction-blowing nozzle of the present invention in a state of being tilted to the right;

[0047] Fig.14 It is a schematic diagram of the suction-blowing nozzle of the present invention in a state of being tilted to the left.

[0048] In the figure: 1, sealing cover; 2, double-axis moving platform; 3, outer tube; 301, first outer transverse tube; 302, outer vertical tube; 303, second outer transverse tube; 4, suction and blowing hole; 5, inner tube; 501, first inner transverse tube; 502, inner vertical tube; 503, second inner transverse tube; 6, annular cavity; 7, suction and blowing nozzle; 8, suction and blowing pipeline switching mechanism; 801, fixed shell; 802, turntable; 803, servo motor; 804, first connecting tube; 80 5. Second connecting pipe; 806. Powder suction pipe; 807. Air blowing pipe; 9. Conduit; 10. Rotating shaft; 11. Mounting plate; 12. Sleeve; 13. Torsion spring; 14. Stop rod; 15. Fixed pipe; 16. First through hole; 17. Second through hole; 18. Movable sleeve; 19. Moving assembly; 1901. Cylinder; 1902. Moving block; 1903. Connecting rod; 20. Through port; 21. Fixed rod; 22. Air pump; 23. Filter. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] See also Figure 1 - Fig.14 , a fully automatic powder suction device, including a sealing cover 1 connected to the molding chamber through a lift, the lower end of the sealing cover 1 is open and located directly above the molding cylinder. It should be noted that the molding cylinder is not located directly below the sealing cover 1 in the working state, so that the laser beam in the 3D printing device can irradiate the base in the molding cylinder; when the 3D printing is completed, the driving mechanism in the molding chamber can control the molding cylinder to move to the bottom of the sealing cover 1, and then perform the powder cleaning work.

[0051] When the molding cylinder is transferred to the bottom of the sealing cover 1, the sealing cover 1 moves downward under the drive of the elevator to cover the molding cylinder; a sealing ring is set at the junction of the molding cylinder and the sealing cover to form a sealed space to prevent dust-containing gas from entering the molding chamber during the cleaning process. In addition, a lifting machine for lifting the substrate is set in the molding chamber, which can drive the substrate in the molding cylinder to move upward, so as to facilitate the cleaning of the powder on the substrate and the surface of the workpiece.

[0052] This embodiment also includes: a dual-axis movable platform 2, an outer tube 3, a plurality of suction and blowing holes 4, an inner tube 5, four suction and blowing nozzles 7, a suction and blowing pipeline switching mechanism 8 and two fixed tubes 15.

[0053] The dual-axis movable platform 2 is installed on the inner top of the sealing cover 1, and the output end of the dual-axis movable platform 2 can move forward and backward and left and right in the sealing cover 1. This is a prior art and will not be described in detail here. The outer tube 3 is fixed to the output end of the dual-axis movable platform 2 in the horizontal direction, and can move forward and backward and left and right in the sealing cover 1 driven by the dual-axis movable platform 2. A plurality of suction and blowing holes 4 are evenly spaced at the bottom of the outer tube 3 for blowing or sucking powder.

[0054] Secondly, the inner tube 5 is fixed inside the outer tube 3 and its two ends extend outside the outer tube 3, and can move synchronously with the outer tube 3. The gap between the inner tube 5 and the outer tube 3 forms an annular cavity 6, and each suction and blowing hole 4 is connected to the annular cavity 6 for conveying high-pressure gas or powder-containing gas. Four suction and blowing nozzles 7 are located outside the outer tube 3 and are connected to the inner tube 5 for blowing air or sucking powder.

[0055] Finally, the suction and blowing pipeline switching mechanism 8 is arranged outside the molding chamber, and the annular cavity 6 is connected to the suction and blowing pipeline switching mechanism 8 through a hose. Two fixed tubes 15 are respectively fixed to the inner sides of the sealing cover 1, and each fixed tube 15 is movably inserted into the corresponding second inner transverse tube 503 in the horizontal direction, and one of the fixed tubes 15 is connected to the suction and blowing pipeline switching mechanism 8 through a hose. When the inner tube 5 moves left and right with the outer tube 3, the second inner transverse tube 503 can slide along the axial direction of the fixed tube 15, and the conveying state of the annular cavity 6 and the inner tube 5 is switched through the suction and blowing pipeline switching mechanism 8.

[0056] With the above design, when the dual-axis mobile platform 2 drives the outer tube 3 to move forward and backward and left and right, the suction and blowing states of the outer tube 3 and the inner tube 5 can be switched through the suction and blowing pipeline switching mechanism 8, thereby realizing the suction and blowing holes 4 blowing air and the suction and blowing nozzle 7 sucking powder, or the suction and blowing holes 4 sucking powder and the suction and blowing nozzle 7 blowing air. Therefore, the powder on the surface of the substrate and the workpiece can be blown up and sucked away in all directions, the cleaning effect is good, and there is no dead corner, which greatly improves the work efficiency.

[0057] During the design process, it was found that since the upper surface of the substrate is lower than the upper surface of the workpiece, if the outer tube 3 and the inner tube 5 are both set horizontally, the outer tube 3 and the inner tube 5 will be too far away from the substrate, thus affecting the cleaning effect. In order to ensure the cleaning effect and make the outer tube 3 and the inner tube 5 close to the workpiece and the substrate, the following design was carried out:

[0058] The outer tube 3 includes a first outer transverse tube 301 fixed to the output end of the dual-axis mobile platform 2 in the horizontal direction, and a plurality of suction and blowing holes 4 are evenly spaced at the bottom of the first outer transverse tube 301, so that the suction and blowing state of the suction and blowing holes 4 is concentrated in the middle position of the sealing cover 1. The two ends of the first outer transverse tube 301 are conductively connected with the outer vertical tube 302, and the lower end of each outer vertical tube 302 is conductively connected with the second outer transverse tube 303, and each second outer transverse tube 303, each outer vertical tube 302 and each first outer transverse tube 301 cooperate to form a boss shape.

[0059] The inner tube 5 includes a first inner transverse tube 501 arranged in the horizontal direction inside the first outer transverse tube 301, and the two ends of the first inner transverse tube 501 are conductively connected with inner vertical tubes 502, and the lower ends of each inner vertical tube 502 are conductively connected with a second inner transverse tube 503, and each second inner transverse tube 503 is fixed in the corresponding second outer transverse tube 303 and extends to the outside of the second outer transverse tube 303 in the horizontal direction. Since the inner tube 5 is arranged in the outer tube 3, the inner tube 5 also needs to form a boss shape. There are four suction and blowing nozzles 7, and the four suction and blowing nozzles 7 are evenly distributed outside the two second outer transverse tubes 303 and are conductively connected with the corresponding second inner transverse tubes 503, so that the suction and blowing state of the suction and blowing nozzles 7 is concentrated on the two sides of the sealing cover 1.

[0060] With the above design, since the outer tube 3 and the inner tube 5 are both configured in a boss shape, they can be close to the workpiece and the substrate at the same time, and thus can clean the workpiece surface and the substrate surface well, with a better cleaning effect.

[0061] Since there is an angle between the workpiece and the substrate, and between the substrate and the forming cylinder, some powder may remain at the angle during the cleaning process. In order to solve this problem, the following design was carried out:

[0062] The upper end of the suction-blowing nozzle 7 is connected to a conduit 9 through a hose, and the conduit 9 is fixed on the second outer transverse tube 303 in the vertical direction and is connected to the second inner transverse tube 503. The suction-blowing nozzle 7 is connected to the second inner transverse tube 503 through the cooperation of the hose and the conduit 9. A rotating shaft 10 is fixed on the front and rear sides of the suction-blowing nozzle 7, and a mounting plate 11 is fixed on the front and rear sides of the conduit 9. A sleeve 12 is fixed on each mounting plate 11. Each rotating shaft 10 rotates in the corresponding sleeve 12, so that the suction-blowing nozzle 7 can rotate along the rotating shaft 10. A torsion spring 13 is arranged in each sleeve 12, and one of the torsion arms of each torsion spring 13 is connected to the corresponding sleeve 12, and the other torsion arm of each torsion spring 13 is connected to the corresponding rotating shaft 10, which is used to make the suction-blowing nozzle 7 in a vertical state. When the suction-blowing nozzle 7 is in a vertical state, it can blow air to the surface of the substrate or perform powder suction work.

[0063] The sealing cover 1 is fixed with a blocking rod 14 located directly below the two second outer transverse tubes 303, the axis of each blocking rod 14 is perpendicular to the axis of the second outer transverse tube 303, and each blocking rod 14 is located between the corresponding two suction and blowing nozzles 7; when the suction and blowing nozzle 7 contacts the blocking rod 14, the suction and blowing nozzle 7 can be driven to rotate along the rotating shaft 10, so that the suction and blowing nozzle 7 is tilted. The front and rear ends of the blocking rod 14 are fixed to the sealing cover 1, so that the front and rear movement of the suction and blowing nozzle 7 in a tilted state will not be affected.

[0064] With the above design, when the outer tube 3 moves to the left or right to the limit position, the corresponding suction and blowing nozzle 7 is tilted through the blocking rod 14, so that air can be blown toward the angle between the workpiece and the substrate, or toward the angle between the substrate and the forming cylinder, so that the powder at the angle can be lifted up and is not easily retained at the angle, thereby greatly improving the cleaning effect.

[0065] It is worth mentioning that the fixing tube 15 is provided with first through holes 16 corresponding to the two corresponding conduits 9 , and the fixing tube 15 is provided with a second through hole 17 located between the two first through holes 16 .

[0066] When the suction-blowing nozzle 7 is in a vertical state, each first through hole 16 is aligned with the corresponding conduit 9. At this time, each suction-blowing nozzle 7 is connected to the second inner transverse tube 503 through the cooperation of the first through hole 16 and the conduit 9, so that it can suck powder or blow air at the same time. When the inner tube 5 moves left and right to the limit position with the outer tube 3, the corresponding suction-blowing nozzle 7 can be driven to tilt through the blocking rod 14; when the suction-blowing nozzle 7 is in a tilted state, each first through hole 16 is staggered with the corresponding conduit 9, and the second through hole 17 is aligned with the corresponding conduit 9. At this time, the suction-blowing nozzle 7 in the tilted state is connected to the second inner transverse tube 503 through the cooperation of the second through hole 17 and the conduit 9, and the suction-blowing nozzle 7 in the vertical state is not connected to the second inner transverse tube 503, so that the high-pressure gas only enters the tilted suction-blowing nozzle 7, the pressure is stronger, and the powder at the angle can be better blown up.

[0067] In this embodiment, two movable sleeves 18 are sleeved on the first outer transverse tube 301, and a moving assembly 19 for moving the two movable sleeves 18 away from and close to each other is provided on the output end of the dual-axis movable platform 2. Through the action of the moving assembly 19, the movable sleeves 18 can slide along the axial direction of the first outer transverse tube 301. A plurality of through openings 20 are evenly distributed at the bottom of each movable sleeve 18, and the spacing between two adjacent through openings 20 is the same as the spacing between two adjacent suction and blowing holes 4, and the number of through openings 20 is less than the number of suction and blowing holes 4.

[0068] Under normal conditions, the two movable sleeves 18 are close to each other to the limit position, at which time each through port 20 can be aligned with the corresponding suction and blowing hole 4, and the movable sleeve 18 does not block other suction and blowing holes 4, so that each suction and blowing hole 4 can perform suction and blowing work normally. When the two movable sleeves 18 are away from each other to the limit position, the three suction and blowing holes 4 located in the middle of the first outer transverse tube 301 are exposed, and the other suction and blowing holes 4 are blocked by the corresponding movable sleeves 18, so that the high-pressure gas can only pass through the three exposed suction and blowing holes 4, the pressure is stronger, and the powder on the surface of the workpiece can be better blown up.

[0069] It should be added that two fixed rods 21 are parallel and fixed at intervals on the top of the first outer transverse tube 301, and the upper end of each fixed rod 21 is fixed to the output end of the dual-axis mobile platform 2. The mobile assembly 19 includes a cylinder 1901 installed at the output end of the dual-axis mobile platform 2, and the output end of the cylinder 1901 is connected to a moving block 1902, and each fixed rod 21 moves through the moving block 1902 in the vertical direction, so that the moving block 1902 can only move along the axial direction of the fixed rod 21. A connecting rod 1903 is hinged at the top of each movable sleeve 18, and the free end of each connecting rod 1903 is hinged to the moving block 1902. When the cylinder 1901 works and drives the moving block 1902 to move downward, the two movable sleeves 18 can be driven away from each other through the connecting rod 1903. When the cylinder 1901 works and drives the moving block 1902 to move upward, the two movable sleeves 18 can be driven to move closer to each other through the connecting rod 1903.

[0070] The suction and blowing pipeline switching mechanism 8 is introduced as follows:

[0071] The suction and blowing pipeline switching mechanism 8 includes a fixed shell 801 arranged outside the molding bin, the upper end of the fixed shell 801 is open, and a turntable 802 is rotatably connected inside the fixed shell 801. A servo motor 803 connected to the turntable 802 is installed on the outer bottom of the fixed shell 801 for driving the turntable 802 to rotate forward or reverse. This is the prior art and will not be repeated here.

[0072] A first connecting pipe 804 and a second connecting pipe 805 are fixedly connected to the bottom of the fixed shell 801 . The first connecting pipe 804 is communicated with the annular cavity 6 through a hose, and the second connecting pipe 805 is communicated with the fixed pipe 15 through a hose.

[0073] A powder suction pipe 806 and an air blowing pipe 807 are fixed in the turntable 802 . The powder suction pipe 806 and the air blowing pipe 807 extend vertically to the outside of the fixed shell 801 . When the turntable 802 rotates, the powder suction pipe 806 and the air blowing pipe 807 can be driven to rotate along the axis of the turntable 802 .

[0074] When the powder suction pipe 806 is aligned with the first connecting pipe 804, and the air blowing pipe 807 is aligned with the second connecting pipe 805, the suction and blowing hole 4 sucks powder, and the suction and blowing nozzle 7 blows air. When the powder suction pipe 806 is aligned with the second connecting pipe 805, and the air blowing pipe 807 is aligned with the first connecting pipe 804, the suction and blowing hole 4 blows air, and the suction and blowing nozzle 7 sucks powder, thereby realizing the conversion of the suction and blowing state.

[0075] It should be added that an air pump 22 and a filter 23 are provided outside the molding chamber. The air pump 22 is used to generate high-pressure gas, and the filter 23 is used to filter the powder-containing gas. The air pump 22 and the filter 23 are both prior art and will not be described in detail here. The air inlet end of the air pump 22 is connected to the air outlet end of the filter 23 through a pipeline, the air outlet end of the air pump 22 is connected to the air blowing pipe 807 through a hose, and the powder inlet end of the filter 23 is connected to the powder suction pipe 806 through a hose. Through the mutual cooperation of the air pump 22, the filter 23, the air blowing pipe 807, the powder suction pipe 806 and other pipelines, the circulation of gas is realized, so that the suction and blowing state of the suction and blowing hole 4 and the suction and blowing nozzle 7 can be converted.

[0076] The working principle of the present invention is as follows:

[0077] Initial state: the sealing cover 1 is located above the forming cylinder, the outer tube 3 and the inner tube 5 are located in the middle of the sealing cover 1, the suction and blowing nozzle 7 is in a vertical state, and the two movable sleeves 18 are in a state of being close to each other. Figure 1 shown.

[0078] State 1: the sealing cover 1 moves downward to cover the forming cylinder; and the air blowing pipe 807 is connected to the second connecting pipe 805 , and the powder suction pipe 806 is connected to the first connecting pipe 804 .

[0079] When the air pump 22 is working, the high-pressure gas generated enters the inner tube 5 through the blowing pipe 807, the second connecting pipe 805 and the fixed pipe 15 in sequence, and then blows out through the suction and blowing nozzles 7 to blow up the dust on both sides of the workpiece. At the same time, the dust blown up in the sealing cover 1 enters the outer tube 3 through the suction and blowing holes 4, and then enters the filter 23 through the annular cavity 6, the first connecting pipe 804 and the powder suction pipe 806 in sequence.

[0080] In this process, the outer tube 3 and the inner tube 5 are driven to move forward and backward by the dual-axis mobile platform 2, so that the dust can be cleaned by blowing downwards on both sides and sucking upwards in the middle. Figure 6 , Fig.10 and Fig.12 shown.

[0081] State 2: The dual-axis movable platform 2 drives the outer tube 3 and the inner tube 5 to move leftward to the limit position, at which time the blocking rod 14 drives the contacting suction and blowing nozzle 7 to tilt to the right; at the same time, the suction and blowing nozzle 7 tilted to the right is connected to the fixed tube 15 through the cooperation of the conduit 9 and the second through hole 17.

[0082] The high-pressure gas generated by the air pump 22 enters the inner tube 5 through the blowing pipe 807, the second connecting pipe 805 and the fixed pipe 15 in sequence, and then blows out through the suction and blowing nozzle 7 tilted to the right, blowing up the dust at the angle between the workpiece and the substrate, and the angle between the substrate and the forming cylinder. At the same time, the dust blown up in the sealing cover 1 enters the outer tube 3 through the suction and blowing holes 4, and then enters the filter 23 through the annular cavity 6, the first connecting pipe 804 and the powder suction pipe 806 in sequence.

[0083] In this process, the outer tube 3 and the inner tube 5 are driven to move forward and backward by the dual-axis mobile platform 2, so that the dust can be cleaned by blowing rightwards on both sides and sucking upwards in the middle. Figure 7 , Fig.10 and Fig.13 shown.

[0084] State three: the dual-axis moving platform 2 drives the outer tube 3 and the inner tube 5 to move rightward to the limit position, at which time the blocking rod 14 drives the contacting suction and blowing nozzle 7 to tilt leftward; at the same time, the suction and blowing nozzle 7 tilted to the left is connected with the fixed tube 15 through the cooperation of the conduit 9 and the second through hole 17.

[0085] The high-pressure gas generated by the air pump 22 enters the inner tube 5 through the blowing pipe 807, the second connecting pipe 805 and the fixed pipe 15 in sequence, and then blows out through the suction and blowing nozzle 7 tilted to the left, blowing up the dust at the angle between the workpiece and the substrate, and the angle between the substrate and the forming cylinder. At the same time, the dust blown up in the sealing cover 1 enters the outer tube 3 through the suction and blowing holes 4, and then enters the filter 23 through the annular cavity 6, the first connecting pipe 804 and the powder suction pipe 806 in sequence.

[0086] In this process, the outer tube 3 and the inner tube 5 are driven to move forward and backward by the dual-axis mobile platform 2, so that the dust can be cleaned by blowing to the left on both sides and sucking upward in the middle. Figure 8 , Fig.10 and Fig.14 shown.

[0087] State four: the outer tube 3 and the inner tube 5 are located in the middle of the sealing cover 1, and the cylinder 1901 works to drive the moving block 1902 to move downward, so that the two movable sleeves 18 move away from each other to the limit position. At this time, the three suction and blowing holes 4 located in the middle of the first outer cross tube 301 are exposed, and the other suction and blowing holes 4 are blocked by the corresponding movable sleeves 18.

[0088] The servo motor 803 drives the turntable 802 to rotate, so that the air blowing pipe 807 is connected to the first connecting pipe 804 , and the powder suction pipe 806 is connected to the second connecting pipe 805 .

[0089] When the air pump 22 is working, the high-pressure gas generated enters the annular cavity 6 through the air blowing pipe 807 and the first connecting pipe 804 in sequence, and then blows out through the three exposed suction and blowing holes 4 to blow up the dust on the upper side of the workpiece. At the same time, the dust blown up in the sealing cover 1 enters the inner tube 5 through the suction and blowing nozzles 7, and then enters the filter 23 through the fixed pipe 15, the second connecting pipe 805 and the powder suction pipe 806 in sequence.

[0090] In this process, the outer tube 3 and the inner tube 5 are driven to move forward and backward by the dual-axis mobile platform 2, so that the dust can be cleaned by blowing downward in the middle and sucking upward on both sides. Fig. 9 , Fig.11 shown.

[0091] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0092] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic powder suction device, comprising a sealing cover (1) connected to a molding chamber via a lift, wherein the sealing cover (1) is open at the lower end and is located directly above a molding cylinder, and is characterized in that: Also includes: A dual-axis movable platform (2), wherein the dual-axis movable platform (2) is mounted on the inner top of the sealing cover (1); An outer tube (3), the outer tube (3) comprising a first outer transverse tube (301) fixed to the output end of the dual-axis movable platform (2) in a horizontal direction, outer vertical tubes (302) being conductively connected at both ends of the first outer transverse tube (301), and second outer transverse tubes (303) being conductively connected at the lower end of each outer vertical tube (302); each second outer transverse tube (303), each outer vertical tube (302) and each first outer transverse tube (301) cooperate with each other to form a boss shape; A plurality of suction and blowing holes (4), wherein the plurality of suction and blowing holes (4) are arranged at equal intervals at the bottom of the first outer transverse tube (301); An inner tube (5), wherein the inner tube (5) is fixed inside the outer tube (3), a gap between the inner tube (5) and the outer tube (3) forms an annular cavity (6), and each suction and blowing hole (4) is in conduction with the annular cavity (6); the inner tube (5) comprises a first inner transverse tube (501) arranged inside the first outer transverse tube (301) along a horizontal direction, inner vertical tubes (502) are conductively connected at both ends of the first inner transverse tube (501), and second inner transverse tubes (503) are conductively connected at the lower end of each inner vertical tube (502), and each second inner transverse tube (503) is fixed inside a corresponding second outer transverse tube (303) and extends outside the second outer transverse tube (303) along a horizontal direction; Four suction and blowing nozzles (7), the four suction and blowing nozzles (7) being evenly distributed outside the two second outer transverse tubes (303) and being in conduction with the corresponding second inner transverse tubes (503); A suction and blowing pipeline switching mechanism (8), wherein the suction and blowing pipeline switching mechanism (8) is arranged outside the molding chamber, and the annular cavity (6) is connected to the suction and blowing pipeline switching mechanism (8) via a hose; Two fixed tubes (15), the two fixed tubes (15) being fixed to two inner sides of the sealing cover (1) respectively, each fixed tube (15) being movably inserted into a corresponding second inner transverse tube (503) in a horizontal direction, and one of the fixed tubes (15) being connected to the suction and blowing pipeline switching mechanism (8) via a hose; Two movable sleeves (18) are sleeved on the first outer transverse tube (301), and a moving assembly (19) for moving the two movable sleeves (18) away from and towards each other is provided on the output end of the dual-axis moving platform (2); A plurality of through openings (20) are evenly distributed at the bottom of each movable sleeve (18), the spacing between two adjacent through openings (20) is the same as the spacing between two adjacent suction and blowing holes (4), and the number of the through openings (20) is less than the number of the suction and blowing holes (4); Two fixing rods (21) are fixed in parallel and at intervals on the top of the first outer transverse tube (301), and the upper end of each fixing rod (21) is fixed to the output end of the dual-axis movable platform (2); The moving assembly (19) comprises a cylinder (1901) mounted on the output end of the dual-axis moving platform (2); the output end of the cylinder (1901) is connected to a moving block (1902); each fixed rod (21) moves vertically through the moving block (1902); a connecting rod (1903) is hinged at the top of each movable sleeve (18); the free end of each connecting rod (1903) is hinged to the moving block (1902); The suction and blowing pipeline switching mechanism (8) comprises a fixed shell (801) arranged outside the molding chamber, the upper end of the fixed shell (801) is open, a turntable (802) is rotatably connected inside the fixed shell (801), and a servo motor (803) drivingly connected to the turntable (802) is installed on the outer bottom of the fixed shell (801); A first connecting tube (804) and a second connecting tube (805) are fixedly connected to the bottom of the fixed shell (801); the first connecting tube (804) is in communication with the annular cavity (6) via a hose, and the second connecting tube (805) is in communication with the fixed tube (15) via a hose; A powder suction pipe (806) and an air blowing pipe (807) are fixed inside the rotating disk (802), and both the powder suction pipe (806) and the air blowing pipe (807) extend vertically to the outside of the fixed shell (801).

2. A fully automatic powder suction device according to claim 1, characterized in that: The upper end of the suction-blowing nozzle (7) is conductively connected to a conduit (9) via a hose, and the conduit (9) is fixed on the second outer transverse tube (303) in a vertical direction and conductively connected to the second inner transverse tube (503); A rotating shaft (10) is fixed on the front and rear sides of the suction and blowing nozzle (7), a mounting plate (11) is fixed on the front and rear sides of the guide tube (9), a sleeve (12) is fixed on each mounting plate (11), and each rotating shaft (10) rotates in a corresponding sleeve (12).

3. A fully automatic powder suction device according to claim 2, characterized in that: A torsion spring (13) is arranged in the sleeve (12), one torsion arm of each torsion spring (13) is connected to the corresponding sleeve (12), and the other torsion arm of each torsion spring (13) is connected to the corresponding rotating shaft (10), so as to keep the suction and blowing nozzle (7) in a vertical state.

4. A fully automatic powder suction device according to claim 3, characterized in that: A blocking rod (14) located directly below the two second outer transverse tubes (303) is fixed inside the sealing cover (1), the axis of each blocking rod (14) being perpendicular to the axis of the second outer transverse tube (303), and each blocking rod (14) being located between the corresponding two suction and blowing nozzles (7); When the outer tube (3) moves to the left or right to a limit position, the corresponding suction and blowing nozzle (7) is placed in a tilted state through the stop rod (14).

5. A fully automatic powder suction device according to claim 4, characterized in that: The fixed tube (15) is provided with first through holes (16) corresponding to the two corresponding conduits (9) one by one, and the fixed tube (15) is provided with a second through hole (17) located between the two first through holes (16); When the suction-blowing nozzle (7) is in a vertical state, each first through hole (16) is aligned with the corresponding conduit (9); when the suction-blowing nozzle (7) is in an inclined state, each first through hole (16) is staggered with the corresponding conduit (9), and the second through hole (17) is aligned with the corresponding conduit (9).

6. A fully automatic powder suction device according to claim 1, characterized in that: When the powder suction pipe (806) is aligned with the first connecting pipe (804), and the air blowing pipe (807) is aligned with the second connecting pipe (805), the suction and blowing holes (4) suck powder, and the suction and blowing nozzle (7) blows air; when the powder suction pipe (806) is aligned with the second connecting pipe (805), and the air blowing pipe (807) is aligned with the first connecting pipe (804), the suction and blowing holes (4) blow air, and the suction and blowing nozzle (7) sucks powder.

7. A fully automatic powder suction device according to claim 6, characterized in that: An air pump (22) and a filter (23) are provided outside the molding chamber; an air inlet end of the air pump (22) is connected to an air outlet end of the filter (23) via a pipeline; an air outlet end of the air pump (22) is connected to an air blowing pipe (807) via a hose; and a powder inlet end of the filter (23) is connected to a powder suction pipe (806) via a hose.

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