A comprehensive 3D printing powder cleaning device

Abstract

The present invention discloses an all-round 3D printing powder cleaning device, including an adsorption hood arranged inside a printer housing and located above a forming cylinder, a screw moving part driving the adsorption hood to move horizontally inside the printer housing is also provided at the top of the inner side of the printer housing, and a screw connecting part connected to the adsorption hood is installed on the screw moving part, the screw connecting part drives the adsorption hood to move up and down and covers just above the forming cylinder, so that the adsorption hood forms a closed powder suction space above the forming cylinder, a powder suction connecting pipe is installed at the top of the adsorption hood, and a blowing connecting pipe is installed on one side of the adsorption hood. The present invention realizes that after printing is completed, the powder at the forming cylinder is automatically absorbed by the adsorption hood, without manual processing, and without exposing the metal powder to the air, thereby reducing risks.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printers, and in particular to an all-round 3D printing powder cleaning device. Background Art

[0002] A 3D printer is an advanced manufacturing device that can transform digital models into physical objects, and build three-dimensional objects by adding materials layer by layer. Based on the digital model created by computer-aided design software, the materials are precisely deposited at specific locations, layer by layer, and eventually form a complete entity. After each print, the metal powder 3D printer needs to clean the metal powder laid on the substrate before continuing the next set of prints.

[0003] The conventional powder cleaning method of existing 3D printers is manual powder cleaning. The main process is that after the workpiece is printed, the powder cleaning staff wears effective dust masks, protective glasses, anti-static wristbands, anti-static gloves, and a full set of anti-static clothing, and transfers the forming cylinder together with the workpiece in the cylinder from the equipment building chamber to the powder cleaning chamber, opens the hatch, and uses a vacuum cleaner to suck away excess powder on the workpiece and in the cylinder. This manual powder cleaning method takes a long time, and the metal powder is exposed to the air, which has a high risk during powder cleaning. In addition, since there is usually a fine gap between the substrate and the forming cylinder, and the substrate also has a groove for easy positioning, during manual powder cleaning, powder remains in the fine gap or groove part, which requires additional cleaning, further affecting the efficiency of powder cleaning. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of low powder cleaning efficiency during manual powder cleaning in the prior art, and to propose an all-round 3D printing powder cleaning device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A 3D printing powder cleaning device of all directions comprises an adsorption cover arranged inside a printer housing and above a molding cylinder, the molding cylinder is located at one side inside the printer housing, a screw moving part driving the adsorption cover to move in a horizontal direction inside the printer housing is also arranged at the top of the interior of the printer housing, and a screw connecting part connected to the adsorption cover is installed on the screw moving part, the screw connecting part drives the adsorption cover to move up and down and covers just above the molding cylinder, so that the adsorption cover forms a closed powder suction space above the molding cylinder, a powder suction connecting pipe is installed at the top of the adsorption cover, an air blowing connecting pipe is installed at one side of the adsorption cover, a rotating powder suction assembly connected to the powder suction connecting pipe is installed at the upper end of the interior of the adsorption cover, a rotating powder blowing assembly connected to the air blowing connecting pipe is installed at the lower end of the interior of the adsorption cover, and a driving assembly driving the rotating powder suction assembly to rotate is installed at the top of the interior of the adsorption cover;

[0007] The powder suction connecting pipe fittings include an air suction main pipe and a first air suction branch pipe and a second air suction branch pipe connected to the air suction main pipe, the first air suction branch pipe is connected to the top end of the adsorption hood, the second air suction branch pipe is connected to the rotating powder suction assembly, and electromagnetic regulating valves are installed on the first air suction branch pipe and the second air suction branch pipe, a pressure sensor for detecting the weight of parts and powder above the substrate is provided on the pad inside the forming cylinder, and a controller electrically connected to the electromagnetic regulating valve and the pressure sensor is also installed on the printer housing, wherein the controller receives the change in the weight of the powder on the substrate detected by the pressure sensor, and adjusts the two electromagnetic regulating valves to change the powder suction strength of the first air suction branch pipe and the second air suction branch pipe.

[0008] Preferably, the screw connecting member includes a connecting slider and a lifting cylinder, wherein the connecting slider is installed on the screw moving member, the lifting cylinder is fixedly installed on the end of the connecting slider away from the screw moving member, the top end of the adsorption cover is fixedly sleeved with a horizontal connecting plate, and the piston end of the lifting cylinder is fixedly connected to the end of the horizontal connecting plate.

[0009] Preferably, the rotating powder suction assembly includes a first fixed outer ring fixed at the upper end of the adsorption hood, a first rotating inner ring plate coaxially arranged on the inner side of the first fixed outer ring, and a middle support ring. The first fixed outer ring and the first rotating inner ring plate are rotatably connected to form a closed annular space. A fixed support rod and a reciprocating screw are symmetrically connected between the first rotating inner ring plate and the middle support ring. A reciprocating slider is connected to each of the reciprocating screws, and a powder suction tube is inserted through one side of the bottom of each reciprocating slider. A telescopic connector is connected between the top ends of the two powder suction tubes and the second exhaust branch pipe.

[0010] Preferably, the telescopic connection member comprises a three-way pipe rotatably connected to the bottom end of the second exhaust branch pipe and a telescopic hose connecting the two pipe openings of the three-way pipe, and the bottom ends of the two telescopic hoses extend to communicate with the top ends of the two powder suction pipes respectively.

[0011] Preferably, a guide slide rod passing through the reciprocating slider is provided below the reciprocating screw, the lower end of the reciprocating slider is rotatably connected to a mounting ring located below the first rotating inner ring plate, and a motor for driving the mounting ring to rotate is installed on the side of the reciprocating slider, the powder suction tube is fixedly inserted in the mounting ring, and the bottom end of the powder suction tube extends to the lower end of the adsorption hood.

[0012] Preferably, the top surface of the first rotating inner ring plate is provided with a plurality of teeth in a circular array, and the driving assembly includes a motor and a driving gear installed on the motor output shaft, and the driving gear meshes with the teeth on the first rotating inner ring plate, so that the motor drives the first rotating inner ring plate to rotate.

[0013] Preferably, one end of the two reciprocating screws passes through the first rotating inner ring plate and is fixedly connected to a driven gear, and the inner top of the first fixed outer ring is also provided with a plurality of teeth in a circular array, and the tops of the two driven gears are meshed with the teeth on the first fixed outer ring.

[0014] Preferably, the rotary powder suction assembly further comprises a plurality of electric push rods mounted on the inner bottom end of the first rotary inner ring plate, and the bottom ends of the electric push rods are fixedly connected to the rotary powder blowing assembly.

[0015] Preferably, the rotary powder blowing assembly includes a second fixed outer ring arranged at the lower end of the inner side of the adsorption hood and a second rotating inner ring plate coaxially arranged on the inner side of the second fixed outer ring, the outer side of the second rotating inner ring plate is tightly against the inner side of the second fixed outer ring, and the second rotating inner ring plate and the second fixed outer ring are rotatably connected to form a closed blowing channel, one end of the blowing connecting pipe passes through the adsorption hood and the second fixed outer ring to the blowing channel, the top end of the second rotating inner ring plate is connected to the bottom end of the electric push rod, and the inner side of the second rotating inner ring plate is connected to a plurality of powder blowing pipes extending to the bottom of the adsorption hood, and the bottom and outer side of the powder blowing pipes are provided with blowing holes.

[0016] Preferably, the upper end of the inner wall of the adsorption cover is provided with an arc-shaped groove supporting the first fixed outer ring, the lower end of the inner wall of the adsorption cover is provided with a guide vertical groove, and the outer wall of the second fixed outer ring is vertically fixedly connected with a guide support rod that fits in the guide vertical groove.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The present invention installs an adsorption cover in the printer housing, installs a powder suction connection pipe and an air blowing connection pipe on the adsorption cover, and arranges a rotating powder suction component and a rotating powder blowing component in the adsorption cover, so that after printing is completed, the adsorption cover automatically absorbs the powder at the forming cylinder, without manual processing, and without exposing the metal powder to the air, thereby reducing risks.

[0019] In addition, by installing an electromagnetic regulating valve on the first air extraction branch pipe and the second air extraction branch pipe of the powder suction connecting pipe fitting and installing a pressure sensor on the pad of the forming cylinder, the pressure sensor can detect the weight on the substrate and judge the absorption amount of the powder on the substrate, so as to dynamically adjust the powder extraction intensity of the first air extraction branch pipe and the second air extraction branch pipe. When there is more powder on the substrate, the second air extraction branch pipe and the rotating powder suction component quickly absorb the powder on the substrate. When there is less powder on the substrate, the first air extraction branch pipe cooperates with the air suction port on the top of the adsorption hood to absorb the powder in the entire adsorption hood, thereby realizing the rapid absorption and processing of the powder and ensuring that the powder in the adsorption hood is thoroughly absorbed, thereby improving the work efficiency as much as possible.

[0020] Finally, a rotating powder blowing assembly is arranged, the rotating powder blowing assembly is connected to the air blowing connecting pipe, and the rotating powder blowing assembly is lifted and lowered in the adsorption hood, so that the powder blowing pipe is extended into the gap between the substrate and the forming cylinder, so as to blow out and clear the residual powder in the gap or groove part, saving extra cleaning time, and cooperating with the rotating powder suction assembly to rotate in the adsorption hood, thereby further improving the cleaning efficiency of the powder blowing and realizing thorough cleaning of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a 3D printing powder cleaning device proposed by the present invention Figure 1 ;

[0022] Figure 2 A cross-sectional view of a printer housing of an all-round 3D printing powder cleaning device proposed by the present invention Figure 1 ;

[0023] Figure 3 A cross-sectional view of a printer housing of an all-round 3D printing powder cleaning device proposed by the present invention Figure 2 ;

[0024] Figure 4 A cross-sectional view of an all-round 3D printing powder cleaning device proposed by the present invention Figure 1 ;

[0025] Figure 5 A cross-sectional view of a printer housing of an all-round 3D printing powder cleaning device proposed by the present invention Figure 3 ;

[0026] Figure 6 This is a schematic diagram of the structure of a lead screw connector of an all-round 3D printing powder cleaning device proposed by the present invention;

[0027] Figure 7 Schematic diagram of the adsorption cover structure of an all-round 3D printing powder cleaning device proposed by the present invention Figure 1 ;

[0028] Figure 8 Schematic diagram of the adsorption cover structure of an all-round 3D printing powder cleaning device proposed by the present invention Figure 2 ;

[0029] Fig. 9 This is a schematic diagram of the structure of a rotating powder suction component of an all-round 3D printing powder cleaning device proposed by the present invention;

[0030] Fig.10 A schematic diagram of a telescopic connector for an all-round 3D printing powder cleaning device proposed by the present invention;

[0031] Fig.11This is a schematic diagram of the reciprocating slider structure of an all-round 3D printing powder cleaning device proposed by the present invention;

[0032] Fig.12 This is a schematic diagram of the structure of a driving component of an all-round 3D printing powder cleaning device proposed by the present invention;

[0033] Fig.13 This is a schematic diagram of the arc-shaped card slot position structure of an all-round 3D printing powder cleaning device proposed by the present invention;

[0034] Fig.14 This is a schematic diagram of the structure of the second rotating inner ring plate of the omnidirectional 3D printing powder cleaning device proposed by the present invention.

[0035] In the figure: 1, printer housing; 2, base plate; 3, adsorption cover; 301, horizontal connecting plate; 302, arc-shaped slot; 303, guide vertical slot; 4, screw moving part; 5, screw connecting part; 6, powder suction connecting pipe; 7, rotating powder suction component; 8, rotating powder blowing component; 9, blowing connecting pipe; 10, driving component; 11, telescopic connecting part; 101, forming cylinder; 102, powder cylinder; 103, pad; 51, connecting slide block; 52, lifting cylinder; 61, pumping Air main pipe; 62, first air extraction branch pipe; 63, second air extraction branch pipe; 64, electromagnetic regulating valve; 71, first fixed outer ring; 72, first rotating inner ring plate; 73, reciprocating screw; 74, fixed support rod; 75, middle support ring; 76, reciprocating slider; 77, electric push rod; 78, powder suction pipe; 79, driven gear; 710, motor; 711, mounting ring; 81, second fixed outer ring; 82, second rotating inner ring plate; 83, powder blowing pipe; 84, guide support rod. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] Reference Figure 1-Figure 8A 3D printing powder cleaning device is disclosed, comprising an adsorption cover 3 arranged inside a printer housing 1 and located above a forming cylinder 101. The forming cylinder 101 is located on one side inside the printer housing 1. The lower end of the adsorption cover 3 is square and can completely cover the entire forming cylinder 101. The upper end is bucket-shaped and can suck away metal powder floating in the adsorption cover 3 through a vacuum pump.

[0039] The adsorption cover 3 can move in the printer housing 1, specifically as follows: in the horizontal direction, a screw moving part 4 is also provided at the inner top of the printer housing 1 to drive the adsorption cover 3 to move horizontally inside the printer housing 1. The screw moving part 4 is composed of a screw and a servo motor driving the screw. By setting the screw moving part 4, during printing, the adsorption cover 3 is moved above the powder cylinder 102 to avoid interference with the printing work. In the vertical direction, a screw connecting part 5 connected to the adsorption cover 3 is installed on the screw moving part 4. The screw connecting part 5 drives the adsorption cover 3 to move up and down and cover it directly above the forming cylinder 101, so that the adsorption cover 3 forms a closed powder suction space above the forming cylinder 101. The design of the adsorption cover 3 being able to be lifted up and down can avoid interference in printing on the one hand, and on the other hand, can ensure that the bottom surface of the adsorption cover 3 is tightly fitted with the bottom wall inside the printer housing 1.

[0040] In the connection between the adsorption hood 3 and the exhaust vacuum pump and the argon tank, specifically, a powder suction connection pipe 6 connected to the air inlet of the exhaust vacuum pump is installed at the top of the adsorption hood 3, and a blowing connection pipe 9 connected to the air outlet of the exhaust vacuum pump is installed on one side of the adsorption hood 3, and the argon tank simultaneously delivers argon into the air outlet pipe when the vacuum pump outlet is venting, so that the air outlet of the exhaust vacuum pump and the air inlet of the argon pipe are simultaneously connected to the blowing connection pipe 9, and when blowing, argon is blown into the adsorption hood 3, and the adsorption hood 3 is placed in an inert gas environment, and the upper end of the interior of the adsorption hood 3 is installed A rotating powder suction component 7 is connected to the powder suction connecting pipe 6. The rotating powder suction component 7 is mainly used to absorb the powder spread on the substrate 2, and the rotating design can ensure comprehensive and thorough absorption. A rotating powder blowing component 8 connected to a blowing connecting pipe 9 is installed at the lower end of the interior of the adsorption hood 3. The rotating powder blowing component 8 is mainly used for blowing the powder in the gap between the substrate 2 and the forming cylinder 101 and the powder in the groove of the substrate 2. After the powder is blown up, it is easy to be sucked away. A driving component 10 for driving the rotating powder suction component 7 to rotate is installed at the top of the interior of the adsorption hood 3.

[0041] The powder suction connection pipe 6 includes an air suction main pipe 61 and a first air suction branch pipe 62 and a second air suction branch pipe 63 connected to the air suction main pipe 61. The first air suction branch pipe 62 is connected to the top of the adsorption cover 3. Figure 1-Figure 8It can be seen that there is a distance between the top of the adsorption hood 3 connected to the first air extraction branch pipe 62 and the substrate 2. At this time, if only the top of the adsorption hood 3 is used for adsorption, the processing efficiency of the powder accumulated on the substrate 2 is not high. Therefore, the second air extraction branch pipe 63 is added to directly clean the powder on the substrate 2 at a close distance. Specifically, the second air extraction branch pipe 63 is connected to the rotary powder suction component 7, and the first air extraction branch pipe 62 and the second air extraction branch pipe 63 are both installed with an electromagnetic regulating valve 64. A pressure sensor for detecting the weight of parts and powder above the substrate 2 is provided on the pad 103 inside the forming cylinder 101, and an electrical connection is also installed on the printer housing 1. A controller is connected to the electromagnetic regulating valve 64 and the pressure sensor, wherein the controller receives the weight change of the powder on the substrate 2 detected by the pressure sensor, and regulates the two electromagnetic regulating valves 64 to change the powder suction strength of the first exhaust branch 62 and the second exhaust branch 63, that is, at the beginning, the air is mainly sucked by the second exhaust branch 63, and the powder is sucked and processed by the rotating powder suction component 7. When the powder on the substrate 2 is almost processed, the air is mainly sucked by the first exhaust branch 62 to absorb the powder scattered in the adsorption cover 3, so as to realize automatic powder suction in both the upper and lower directions at the same time, and the powder suction strength is automatically adjusted according to needs, thereby improving the overall powder suction efficiency.

[0042] Reference Figure 3-Figure 6 The screw connection member 5 includes a connecting slider 51 and a lifting cylinder 52, wherein the connecting slider 51 is installed on the screw moving member 4, the connecting slider 51 is adapted to the screw of the screw moving member 4, so that the connecting slider 51 slides along the length direction of the screw, and the lifting cylinder 52 is fixedly installed at one end of the connecting slider 51 away from the screw moving member 4. Figure 3 as well as Figure 6 It can be seen that the top of the lifting cylinder 52 is located on the side of the top print head in the printer housing 1 to avoid interference with printing. The top of the adsorption cover 3 is fixedly sleeved with a horizontal connecting plate 301, and the piston end of the lifting cylinder 52 is fixedly connected to the end of the horizontal connecting plate 301, so that the lifting cylinder 52 can work, drive the horizontal connecting plate 301 to rise and fall, and then drive the adsorption cover 3 to rise and fall.

[0043] Reference Figure 6-Figure 9 The rotating powder suction assembly 7 includes a first fixed outer ring 71 fixed to the upper end of the suction cover 3, a first rotating inner ring plate 72 coaxially arranged on the inner side of the first fixed outer ring 71, and a middle support ring 75. The middle support ring 75 is located at the innermost side. The first fixed outer ring 71 is rotatably connected with the first rotating inner ring plate 72 to form a closed annular space, which not only realizes the stability of the connection between the first rotating inner ring plate 72 and the first fixed outer ring 71, but also prevents powder from entering the annular space. A fixed support rod 74 and a reciprocating screw 73 are symmetrically connected between the first rotating inner ring plate 72 and the middle support ring 75. Fig. 9As shown, two fixed support rods 74 and two reciprocating screws 73 are arranged alternately, and the fixed support rods 74 are used to fix the middle support ring 75 and the first rotating inner ring plate 72, and the reciprocating screw 73 is rotatably connected between the first rotating inner ring plate 72 and the middle support ring 75, and each reciprocating screw 73 is connected with a reciprocating slider 76. When the reciprocating screw 73 rotates, the reciprocating slider 76 slides back and forth along the surface groove portion of the reciprocating screw 73, and a powder suction tube 78 is inserted through one side of the bottom of each reciprocating slider 76, that is, the movement of the reciprocating slider 76 drives the movement of the powder suction tube 78, and a telescopic connecting piece 11 is connected between the top end of the two powder suction tubes 78 and the second air suction branch pipe 63, that is, the vacuum suction pump can suck powder through the two powder suction tubes 78 through the second air suction branch pipe 63 and the telescopic connecting piece 11, and the telescopic connecting piece 11 can also ensure the stability of powder suction by the powder suction tube 78 during movement.

[0044] Reference Figure 9-10 In order to achieve stable powder suction during the movement of the powder suction pipe 78, and the powder suction pipe 78 can still perform powder suction when following the rotation of the first rotating inner ring plate 72, the telescopic connecting member 11 includes a three-way pipe rotatably connected to the bottom end of the second air suction branch pipe 63 and a telescopic hose connecting the two pipe openings of the three-way pipe, the bottom ends of the two telescopic hoses are respectively connected to the top ends of the two powder suction pipes 78, the top of the three-way pipe is kept sealed when it is rotatably connected to the second air suction branch pipe 63, and the three-way pipe as a whole is supported by two L-shaped support rods and fixed on the middle support ring 75, so that the three-way pipe rotates with the middle support ring 75 to achieve synchronization when the powder suction pipe 78 rotates, and the telescopic hose can be telescoped when the powder suction pipe 78 moves to achieve ventilation.

[0045] Reference Figure 9-11 In order to achieve stability when the reciprocating slider 76 moves, a guide slide bar penetrating the reciprocating slider 76 is provided below the reciprocating screw 73. In the actual powder suction process of the powder suction tube 78, due to the diverse structures of 3D printed products, there may also be gaps between the products and the substrate 2. At this time, when sucking powder, it is necessary to specifically clean the powder in the gap. Therefore, a mounting ring 711 located below the first rotating inner ring plate 72 is rotatably connected to the lower end of the reciprocating slider 76, and a motor 710 for driving the mounting ring 711 to rotate is installed on the side of the reciprocating slider 76. The powder suction tube 78 is fixedly plugged into the mounting ring. The powder suction tube 78 is arranged inside the ring 711, and the bottom end of the powder suction tube 78 extends to the lower end of the adsorption cover 3. The mounting ring 711 is located below the first rotating inner ring plate 72 to ensure that the reciprocating slider 76 moves close to the two ends of the reciprocating screw 73 and the mounting ring 711 does not touch the first rotating inner ring plate 72 or the middle support ring 75. At the same time, the powder suction tube 78 can also be moved closer to the two ends of the reciprocating screw 73. The design of the motor 710 is to adjust the powder suction angle of the bottom of the powder suction tube 78, so that it can suck powder from the gap between the product and the substrate 2 after rotation to ensure comprehensive and thorough powder suction.

[0046] Reference Figure 8 and Fig.12 In order to achieve stable rotation of the first rotating inner ring plate 72, a plurality of teeth are arranged in a ring array on the top surface of the first rotating inner ring plate 72. The driving assembly 10 includes a motor and a driving gear installed on the output shaft of the motor. The driving gear meshes with the teeth on the first rotating inner ring plate 72, so that the motor drives the first rotating inner ring plate 72 to rotate.

[0047] Similarly, in order to realize the self-rotation of the reciprocating screw 73 following the rotation of the first rotating inner ring plate 72 to adjust the position of the powder suction pipe 78, refer to Figure 9-13 One end of the two reciprocating screws 73 passes through the first rotating inner ring plate 72 and is fixedly sleeved with a driven gear 79. The inner top of the first fixed outer ring 71 is also provided with a plurality of teeth in a ring array. The tops of the two driven gears 79 are meshed with the teeth on the first fixed outer ring 71. When the first fixed outer ring 71 rotates, the two driven gears 79 roll on the teeth, thereby driving the reciprocating screws 73 to rotate. Here, the driven gear 79 and the above-mentioned driving gear are both bevel gears.

[0048] Ginseng Fig. 9 The rotating powder suction assembly 7 also includes a plurality of electric push rods 77 installed at the inner bottom end of the first rotating inner ring plate 72. The bottom ends of the electric push rods 77 are fixedly connected to the rotating powder blowing assembly 8. When the first rotating inner ring plate 72 of the rotating powder suction assembly 7 rotates, the electric push rods 77 are driven to rotate, and then the rotating powder blowing assembly 8 is driven to rotate by the electric push rods 77.

[0049] Reference Figure 9-14Specifically, the rotary powder blowing assembly 8 includes a second fixed outer ring 81 arranged at the lower end of the inner side of the adsorption hood 3 and a second rotating inner ring plate 82 coaxially arranged inside the second fixed outer ring 81. The outer side of the second rotating inner ring plate 82 is tightly attached to the inner side of the second fixed outer ring 81, and the second rotating inner ring plate 82 is rotatably connected to the second fixed outer ring 81 to form a closed blowing channel to ensure that there is no leakage and powder does not enter. One end of the blowing connecting pipe 9 passes through the adsorption hood 3 and the second fixed outer ring 81 to the blowing channel. The top end of the second rotating inner ring plate 82 is in contact with the electric push rod 77. The bottom end is connected, and the inner side of the second rotating inner ring plate 82 is connected with a plurality of powder blowing tubes 83 extending to the bottom of the adsorption hood 3. The bottom and outer sides of the powder blowing tubes 83 are provided with blowing holes. The powder blowing tube 83 is connected with the blowing channel through the second rotating inner ring plate 82, so that the argon gas blown out of the blowing connecting pipe 9 first enters the blowing channel, and then enters the powder blowing tube 83 to blow out the gas. The diameter of the powder blowing tube 83 is adjusted as needed to ensure that the powder blowing tube 83 can be inserted into the gap between the substrate 2 and the forming cylinder 101, and the blowing holes are arranged in the powder blowing tube 83 toward the inner wall of the gap to blow up the powder on the inner wall and the bottom. In order to ensure that the first fixed outer sleeve ring 71 is firmly fixed, an arc-shaped groove 302 for supporting the first fixed outer sleeve ring 71 is provided at the upper end of the inner wall of the adsorption cover 3. Similarly, in order to ensure the stability of the up and down movement of the second fixed outer sleeve ring 81, a guide vertical groove 303 is opened at the lower end of the inner wall of the adsorption cover 3, and the outer wall of the second fixed outer sleeve ring 81 is vertically fixedly connected with a guide support rod 84 that fits in the guide vertical groove 303.

[0050] Working principle: When printing is finished and the finished product is of normal specifications, when cleaning the powder in the forming cylinder 101, first start the screw moving part 4 to move the adsorption cover 3 to the top of the forming cylinder 101, then start the lifting cylinder 52, the lifting cylinder 52 drives the adsorption cover 3 to descend until the bottom surface of the adsorption cover 3 is attached to the bottom wall of the printer, and at the same time, the pad 103, the substrate 2 and the formed parts in the forming cylinder 101 are moved to the forming cylinder 101 under the control of the lifting cylinder to work, at this time, the adsorption cover 3 covers the forming cylinder 101 and forms The sealed powder suction space is started, the vacuum suction pump and the driving component 10 are started, the vacuum suction pump is started, and air is sucked by the powder suction connecting pipe 6. At this time, the first suction branch pipe 62 of the powder suction connecting pipe is connected to the top of the adsorption hood 3, and the second suction branch pipe 63 is connected to the two powder suction pipes 78, and at this time the bottom end of the powder suction pipe 78 is located above the substrate 2 close to the powder. The electromagnetic regulating valve 64 is controlled by the controller to make the second suction branch pipe 63 allocate more suction intensity, and the powder suction pipe 78 quickly absorbs the powder accumulated on the substrate 2.

[0051] During the process of powder suction tube 78 absorbing powder, the driving assembly 10 works, and the driving gear drives the first rotating inner ring plate 72 to rotate. The rotation of the first rotating inner ring plate 72 drives the two powder suction tubes 78 to rotate in the adsorption cover 3. While the first rotating inner ring plate 72 rotates, the two reciprocating screws 73 rotate around the center of the first rotating inner ring plate 72. At this time, the teeth in the first fixed outer ring 71 mesh with the driven gear 79, driving the two reciprocating screws 73 to rotate. The rotation of the reciprocating screw 73 drives the powder suction tube 78 to reciprocate along the reciprocating screw 73, that is, from the outer side above the substrate 2 to zero. The powder suction tube 78 reciprocates towards and away from the parts, so as to realize comprehensive and rapid absorption of the powder on the substrate 2 by the powder suction tube 78. As the powder on the substrate 2 gradually decreases, the weight above the substrate 2 begins to decrease, and the pressure sensor detects the change in weight, and based on the initial weight and the weight range of the molded parts, the degree of cleaning of the powder on the substrate 2 is judged. When the powder on the substrate 2 is less than 30%, the controller begins to regulate the electromagnetic regulating valve 64 to redistribute the suction strength of the first suction branch pipe 62 and the second suction branch pipe 63, so that the first suction branch pipe 62 is gradually strengthened and the second suction branch pipe 63 is gradually weakened.

[0052] During the powder blowing process of the powder suction pipe 78, the electric push rod 77 first drives the rotating powder blowing assembly 8 to descend as a whole, so that the powder blowing pipe 83 descends to the bottom of the gap formed between the substrate 2 in the forming cylinder 101 and the inner wall of the forming cylinder 101, and in the subsequent process, as the substrate 2 is slowly driven upward by the jacking mechanism, the electric push rod 77 begins to slowly shrink, so that the bottom of the powder blowing pipe 83 is close to the bottom of the gap, and at this time, the vacuum pump also transports argon gas into the adsorption hood 3 through the blowing connecting pipe 9 to supplement the suction The inert gas in the attached cover 3 is first transported by the blowing connecting pipe 9 to the blowing channel formed between the second fixed outer ring 81 and the second rotating inner ring plate 82, and then enters into each powder blowing pipe 83. The powder blowing pipe 83 blows out the inert gas through a plurality of blowing holes and blows the powder in the gaps and grooves. With the rotation of the rotating powder suction assembly 7, a plurality of powder blowing pipes 83 rotate with the electric push rod 77 and the second rotating inner ring plate 82, so that the powder blowing pipe 83 blows powder to the entire gap and all the grooves.

[0053] When the finished product of 3D printing is larger at the top and smaller at the bottom, that is, a gap is formed between the bottom of the finished product and the substrate 2 for hiding the powder, at this time, when the powder suction tube 78 follows the movement of the reciprocating slider 76, when the reciprocating slider 76 moves close to the finished product, the controller controls the motor 710 to rotate, and the motor 710 drives the bottom mounting ring 711 of the reciprocating slider 76 to rotate, so that the bottom of the powder suction tube 78 tilts toward the finished product, that is, the nozzle of the powder suction tube 78 absorbs the powder in the gap. Similarly, when the reciprocating slider 76 moves close to the first rotating inner ring plate 72, that is, the powder suction tube 78 moves close to the gap between the substrate 2 and the forming cylinder 101, the controller controls the motor 710 to rotate in the opposite direction, so that the bottom nozzle of the powder suction tube 78 tilts toward the gap, so as to facilitate the absorption of the blown powder.

[0054] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An all-round 3D printing powder cleaning device, comprising an adsorption cover (3) arranged inside a printer housing (1) and located above a forming cylinder (101), wherein the forming cylinder (101) is located on one side inside the printer housing (1), characterized in that: The top of the printer housing (1) is also provided with a screw moving member (4) for driving the adsorption cover (3) to move in the horizontal direction inside the printer housing (1), and a screw connecting member (5) connected to the adsorption cover (3) is installed on the screw moving member (4), the screw connecting member (5) drives the adsorption cover (3) to move up and down, and covers the top of the molding cylinder (101), so that the adsorption cover (3) forms a closed powder suction space above the molding cylinder (101), the top of the adsorption cover (3) is installed with a powder suction connecting pipe (6), one side of the adsorption cover (3) is installed with a blowing connecting pipe (9), the upper end of the adsorption cover (3) is installed with a rotating powder suction component (7) connected to the powder suction connecting pipe (6), the lower end of the adsorption cover (3) is installed with a rotating powder blowing component (8) connected to the blowing connecting pipe (9), and the top of the adsorption cover (3) is installed with a driving component (10) for driving the rotating powder suction component (7) to rotate; The powder suction connection pipe fitting (6) comprises an air suction main pipe (61) and a first air suction branch pipe (62) and a second air suction branch pipe (63) connected to the air suction main pipe (61), wherein the first air suction branch pipe (62) is connected to the top end of the adsorption cover (3), and the second air suction branch pipe (63) is connected to the rotary powder suction component (7), and electromagnetic regulating valves (64) are installed on the first air suction branch pipe (62) and the second air suction branch pipe (63), and a pressure sensor for detecting the weight of parts and powder above the substrate (2) is provided on the pad (103) inside the molding cylinder (101), and a controller electrically connected to the electromagnetic regulating valve (64) and the pressure sensor is also installed on the printer housing (1), wherein the controller receives the weight change of the powder on the substrate (2) detected by the pressure sensor, and adjusts the two electromagnetic regulating valves (64) to change the powder suction strength of the first air suction branch pipe (62) and the second air suction branch pipe (63); The rotating powder suction assembly (7) comprises a first fixed outer ring (71) fixed to the upper end of the suction cover (3), a first rotating inner ring plate (72) coaxially arranged on the inner side of the first fixed outer ring (71), and a middle support ring (75); the first fixed outer ring (71) and the first rotating inner ring plate (72) are rotatably connected to form a closed annular space; a fixed support rod (74) and a reciprocating screw (73) are symmetrically connected between the first rotating inner ring plate (72) and the middle support ring (75); each of the reciprocating screws (73) is connected to a reciprocating slider (76); and a powder suction pipe (78) is inserted and connected to one side of the bottom of each reciprocating slider (76); and a telescopic connecting piece (11) is connected between the top ends of the two powder suction pipes (78) and the second exhaust branch pipe (63).

2. The omnidirectional 3D printing powder cleaning device according to claim 1, characterized in that: The rotary powder blowing assembly (8) comprises a second fixed outer ring (81) arranged at the lower end of the inner side of the adsorption hood (3) and a second rotating inner ring plate (82) coaxially arranged on the inner side of the second fixed outer ring (81); the outer side of the second rotating inner ring plate (82) is in close contact with the inner side of the second fixed outer ring (81); the second rotating inner ring plate (82) and the second fixed outer ring (81) are rotatably connected to form a closed air blowing channel; one end of the air blowing connecting pipe (9) passes through the adsorption hood (3) and the second fixed outer ring (81) into the air blowing channel; the top end of the second rotating inner ring plate (82) is connected to the bottom end of the electric push rod (77); and the inner side of the second rotating inner ring plate (82) is connected to a plurality of powder blowing pipes (83) extending to the bottom of the adsorption hood (3); and the bottom and outer sides of the powder blowing pipes (83) are provided with air blowing holes.

3. The all-round 3D printing powder cleaning device according to claim 1, characterized in that: The screw connecting member (5) comprises a connecting slider (51) and a lifting cylinder (52), wherein the connecting slider (51) is mounted on the screw moving member (4), and the lifting cylinder (52) is fixedly mounted on an end of the connecting slider (51) away from the screw moving member (4), a horizontal connecting plate (301) is fixedly sleeved on the top end of the adsorption cover (3), and a piston end of the lifting cylinder (52) is fixedly connected to an end of the horizontal connecting plate (301).

4. The omnidirectional 3D printing powder cleaning device according to claim 2, characterized in that: The telescopic connection member (11) comprises a three-way pipe rotatably connected to the bottom end of the second exhaust branch pipe (63) and a telescopic hose connecting two pipe openings of the three-way pipe, the bottom ends of the two telescopic hoses being respectively connected to the top ends of the two powder suction pipes (78).

5. The omnidirectional 3D printing powder cleaning device according to claim 4, characterized in that: A guide slide rod penetrating the reciprocating slider (76) is provided below the reciprocating screw (73); the lower end of the reciprocating slider (76) is rotatably connected to a mounting ring (711) located below the first rotating inner ring plate (72); and a motor (710) for driving the mounting ring (711) to rotate is installed on the side of the reciprocating slider (76); the powder suction pipe (78) is fixedly inserted in the mounting ring (711), and the bottom end of the powder suction pipe (78) extends to the lower end of the adsorption cover (3).

6. The all-round 3D printing powder cleaning device according to claim 5, characterized in that: The top surface of the first rotating inner ring plate (72) is provided with a plurality of teeth in an annular array, the driving assembly (10) comprises a motor and a driving gear mounted on an output shaft of the motor, the driving gear meshing with the teeth on the first rotating inner ring plate (72), so that the motor drives the first rotating inner ring plate (72) to rotate.

7. The omnidirectional 3D printing powder cleaning device according to claim 6, characterized in that: One end of each of the two reciprocating screws (73) passes through the first rotating inner ring plate (72) and is fixedly sleeved with a driven gear (79); the inner top end of the first fixed outer ring (71) is also provided with a plurality of teeth in a ring array; the top ends of the two driven gears (79) are meshed with the teeth on the first fixed outer ring (71).

8. The omni-directional 3D printing powder cleaning device according to claim 7, characterized in that: The rotary powder suction assembly (7) further comprises a plurality of electric push rods (77) mounted on the inner bottom end of the first rotary inner ring plate (72), the bottom ends of the electric push rods (77) being fixedly connected to the rotary powder blowing assembly (8).

9. The all-round 3D printing powder cleaning device according to claim 8, characterized in that: The upper end of the inner wall of the adsorption cover (3) is provided with an arc-shaped groove (302) for supporting the first fixed outer ring (71), the lower end of the inner wall of the adsorption cover (3) is provided with a guide vertical groove (303), and the outer wall of the second fixed outer ring (81) is vertically fixedly connected with a guide support rod (84) that fits in the guide vertical groove (303).

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