Material powder screening device for 3D printing

Abstract

The utility model discloses a material powder screening device for 3D printing, relates to the technical field of 3D printing material processing, and aims to solve the problems that an existing screening device needs to screen out large-particle powder which cannot be used for printing, and fine-particle powder can be continuously used for subsequent printing; at present, powder is mainly screened manually at present, an operator needs to control a screen to screen the powder manually, the method is time-consuming and labor-consuming, the powder is extremely easy to waste, and the problem to be improved is solved. The powder screening device comprises a powder screening box and further comprises a powder screening frame which is arranged in the powder screening box, the powder screening frame is obliquely arranged in the powder screening box, the front end and the rear end of the interior of the powder screening frame are open, a screen is arranged on the surface of the bottom of the powder screening frame and communicates with the inner side and the outer side of the powder screening frame, and fixing bases are symmetrically arranged on the two sides of the bottom of the powder screening frame; and the powder screening frame swings up and down through a fixing seat, and a fixing frame is arranged at the bottom of the fixing seat.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing material processing, in particular to a material powder screening device for 3D printing. Background Art

[0002] Laser selective melting is a major technical approach in 3D printing of metal materials. This technology uses laser as the energy source and scans the metal powder bed layer by layer according to the path planned in the 3D CAD slice model. The scanned metal powder is melted and solidified to achieve the effect of metallurgical bonding, and finally the metal parts designed by the model are obtained. The raw material of this printing method is fine-grained metal powder, and this process determines that the raw material powder can be recycled.

[0003] In the process of reuse, a key step is powder screening, which requires screening out large particles of powder that cannot be used for printing, and fine particles of powder can continue to be used for subsequent printing; currently, the powder is mainly screened manually, and the operator needs to screen the powder through a hand-controlled sieve. This method is not only time-consuming and labor-intensive, but also very easy to cause waste of powder, and needs to be improved; therefore, we propose a material powder screening device for 3D printing to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a powder screening device for 3D printing materials, so as to solve the problem proposed in the above-mentioned background technology that large-particle powder that cannot be used for printing needs to be screened out, and fine-particle powder can continue to be used for subsequent printing; currently, the powder screening is mainly done manually, and the operator needs to screen the powder through a hand-controlled sieve. This method is not only time-consuming and labor-intensive, but also very likely to cause waste of powder, and there is a problem that needs to be improved.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a material powder screening device for 3D printing, comprising a powder screening box;

[0006] Also includes:

[0007] A powder sieving frame is arranged inside a powder sieving box, the powder sieving frame is arranged inside the powder sieving box in an inclined state, and the front and rear ends of the powder sieving frame are both open-type. A sieve is arranged on the bottom surface of the powder sieving frame, and the sieve is connected to the inner and outer sides of the powder sieving frame. Fixed seats are symmetrically arranged on both sides of the bottom of the powder sieving frame, and the powder sieving frame swings up and down through the fixed seats. A fixed frame is arranged at the bottom of the fixed seat, and the fixed frame is fixed at both ends of the inner wall of the powder sieving box, and the powder sieving frame is installed inside the powder sieving box through the connection with the fixed frame. Eccentric shafts are symmetrically arranged on both sides of the upper end of the powder sieving frame, a connecting rod is arranged between the two eccentric shafts, and the connecting rod passes through the inside of the powder sieving frame to connect and fix the two eccentric shafts, a rotating rod is arranged on the outside of the eccentric shaft, and the rotating rod is fixed to the inner wall of the powder sieving box, a first motor is arranged on one side of the outer wall of the powder sieving box, the first motor drives one of the rotating rods to drive the eccentric shaft to rotate, and the eccentric shaft drives the powder sieving frame to swing slightly up and down inside the powder sieving box, and a feeding hopper is arranged at the upper end of the powder sieving box.

[0008] Preferably, a slide groove is integrally formed at the inner upper end of the fixing frame, and the bottom of the fixing seat is slidably engaged in the slide groove, and springs are provided at both the front and rear ends of the slide groove, and the springs are connected to the front and rear ends of the bottom of the fixing seat.

[0009] Preferably, a connecting hose is provided between the feed hopper and the powder sieving frame, and the connecting hose seals and connects the bottom of the feed hopper with the front end of the inside of the powder sieving frame.

[0010] Preferably, a first discharge port is provided at the front end of the powder sifting box, and the first discharge port passes through the interior of the powder sifting box and extends to below the bottom outlet of the powder sifting frame.

[0011] Preferably, a conveyor belt is provided at the inner bottom end of the powder screening box, and the conveyor belt is located below the screen, and the conveyor belt is installed at the inner bottom end of the powder screening box through a support frame, a second motor is provided on the outer side of one of the support frames, and the second motor drives the transmission roller to drive the conveyor belt to rotate toward the rear end of the powder screening box, and a second discharge port is provided at the rear end of the powder screening box, and the second discharge port passes through the interior of the powder screening box and extends to below the rear end of the conveyor belt.

[0012] Preferably, baffles are symmetrically arranged on both sides of the powder screening box, the baffles are fixed to the inside of the powder screening box through connectors, and the inner sides of the baffles are attached to the left and right sides of the powder screening frame and the conveyor belt.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. An inclined powder screening frame is arranged inside the powder screening box, an eccentric shaft is arranged at the front end of the powder screening frame to drive the powder screening frame to swing up and down, a screen is arranged at the bottom of the powder screening frame, and after the 3D printing material is placed inside the powder screening frame, the 3D printing material can be shaken inside the powder screening frame by swinging up and down, and smaller 3D printing material particles fall from the screen, while larger 3D printing material particles remain in the powder screening frame and continuously slide down to the outlet. The device can screen larger particles and smaller particles in the 3D printing material, and can collect larger particles and smaller particles of the 3D printing material separately.

[0015] 2. By setting a transmission structure at the bottom end of the powder screening box, the smaller particles of 3D printing materials falling from the screen can be caught, and a second discharge port is set at the rear end of the transmission structure to uniformly collect the smaller particles on the transmission structure. At the same time, a first discharge port is set at the outlet of the powder screening frame to uniformly collect the larger particles of 3D printing materials falling from the powder screening frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an internal side view of the overall structure of the utility model;

[0017] Figure 2 This is the internal rear view of the powder screening box of the utility model;

[0018] Figure 3 This is a schematic diagram of the powder sieving frame structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the fixing seat and the fixing frame of the utility model;

[0020] In the figure: 1. powder screening box; 2. powder screening frame; 3. eccentric shaft; 4. rotating rod; 5. fixed seat; 6. fixed frame; 7. first discharge port; 8. slide slot; 9. spring; 10. first motor; 11. screen; 12. connecting rod; 13. feed hopper; 14. connecting hose; 15. conveyor belt; 16. support frame; 17. baffle; 18. second discharge port; 19. second motor. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely 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 of the embodiments.

[0022] See also Figure 1-4 , the utility model provides an embodiment: a material powder screening device for 3D printing, comprising a powder screening box 1;

[0023] Also includes:

[0024] The powder sieving frame 2 is arranged inside the powder sieving box 1, the powder sieving frame 2 is arranged inside the powder sieving box 1 in an inclined state, and the front and rear ends of the powder sieving frame 2 are both open, the bottom surface of the powder sieving frame 2 is provided with a screen 11, and the screen 11 is connected to the inner and outer sides of the powder sieving frame 2, the two sides of the bottom of the powder sieving frame 2 are symmetrically provided with fixed seats 5, and the powder sieving frame 2 swings up and down through the fixed seats 5, the bottom of the fixed seat 5 is provided with a fixed frame 6, the fixed frame 6 is fixed at the two ends of the inner wall of the powder sieving box 1, and the powder sieving frame 2 is installed inside the powder sieving box 1 through the connection with the fixed frame 6, and the powder sieving frame Eccentric shafts 3 are symmetrically arranged on both sides of the upper end of the frame 2, a connecting rod 12 is arranged between the two eccentric shafts 3, and the connecting rod 12 passes through the interior of the powder sieving frame 2 to connect and fix the two eccentric shafts 3, a rotating rod 4 is arranged on the outer side of the eccentric shaft 3, and the rotating rod 4 is fixed to the inner wall of the powder sieving box 1, and a first motor 10 is arranged on one side of the outer wall of the powder sieving box 1, the first motor 10 drives one of the rotating rods 4 to drive the eccentric shafts 3 to rotate, and the eccentric shaft 3 drives the powder sieving frame 2 to swing slightly up and down inside the powder sieving box 1, and a feed hopper 13 is arranged at the upper end of the powder sieving box 1.

[0025] An inclined powder screening frame 2 is arranged inside the powder screening box 1, and an eccentric shaft 3 is arranged at the front end of the powder screening frame 2 to drive the powder screening frame 2 to swing up and down. A screen 11 is arranged at the bottom of the powder screening frame 2. After the 3D printing material is placed inside the powder screening frame 2, the 3D printing material can be shaken inside the powder screening frame 2 by swinging up and down. Smaller 3D printing material particles fall from the screen 11, while larger 3D printing material particles remain in the powder screening frame 2 and continuously slide down to the outlet, so that the particles of the 3D printing material can be effectively separated.

[0026] See also Figure 4 The upper end of the interior of the fixed frame 6 is integrally formed with a slide groove 8, and the bottom of the fixed seat 5 is slidably engaged in the interior of the slide groove 8. Springs 9 are provided at the front and rear ends of the interior of the slide groove 8, and the springs 9 are connected to the front and rear ends of the bottom of the fixed seat 5, so that the powder sifting frame 2 will drive the fixed seat 5 to slide forward and backward when it swings up and down. The slide groove 8 is provided inside the fixed frame 6 to facilitate the fixed seat 5 to slide forward and backward.

[0027] See also Figure 1 A connecting hose 14 is provided between the feed hopper 13 and the powder sieving frame 2, and the connecting hose 14 seals and connects the bottom of the feed hopper 13 with the front end inside the powder sieving frame 2. The feed hopper 13 and the powder sieving frame 2 are connected by the connecting hose 14, and the flexible connecting hose 14 is not affected by the up and down swing of the powder sieving frame 2.

[0028] See also Figure 1A first discharge port 7 is provided at the front end of the powder screening box 1, and the first discharge port 7 passes through the interior of the powder screening box 1 and extends to below the bottom outlet of the powder screening frame 2, so as to facilitate the output of larger particles of 3D printing materials at the outlet of the powder screening frame 2.

[0029] See also Figure 1 A conveyor belt 15 is provided at the inner bottom end of the powder screening box 1, and the conveyor belt 15 is located below the screen 11. The conveyor belt 15 is installed at the inner bottom end of the powder screening box 1 through a support frame 16. A second motor 19 is provided on the outer side of one of the support frames 16, and the second motor 19 drives the transmission roller to drive the conveyor belt 15 to rotate toward the rear end of the powder screening box 1. A second discharge port 18 is provided at the rear end of the powder screening box 1, and the second discharge port 18 passes through the interior of the powder screening box 1 and extends to below the rear end of the conveyor belt 15, so as to transmit the smaller particles of the fallen 3D printing material.

[0030] See also Figure 1 Baffles 17 are symmetrically arranged on both sides of the powder screening box 1. The baffles 17 are fixed to the inside of the powder screening box 1 through a connecting piece, and the inner side of the baffles 17 is attached to the left and right sides of the powder screening frame 2 and the conveyor belt 15 to prevent smaller particles of 3D printing materials from falling from the screen 11 and falling on the conveyor belt 15.

[0031] Working principle: Pour the 3D printing material from the feed hopper 13, and transport it to the inside of the powder screening frame 2 through the connecting hose 14, start the first motor 10, drive the eccentric shaft 3 to rotate, and the eccentric shaft 3 drives the powder screening frame 2 to swing up and down. The 3D printing material slides downward under the continuous swing of the powder screening frame 2, and the smaller particles of the 3D printing material will naturally fall when passing through the screen 11 and fall on the conveyor belt 15. At the same time, start the second motor 19 to drive the conveyor belt 15 to rotate, and transport the smaller particles of the fallen 3D printing material to the second discharge port 18, while the larger particles of the 3D printing material slowly slide down along the powder screening frame 2 to the outlet and fall out from the first discharge port 7.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A material powder screening device for 3D printing, comprising a powder screening box (1); Features: Also includes: A powder sieving frame (2) is arranged inside a powder sieving box (1), the powder sieving frame (2) is arranged inside the powder sieving box (1) in an inclined state, and the front and rear ends of the powder sieving frame (2) are both open-type, the bottom surface of the powder sieving frame (2) is provided with a screen (11), and the screen (11) is connected to the inner and outer sides of the powder sieving frame (2), the two sides of the bottom of the powder sieving frame (2) are symmetrically provided with fixed seats (5), and the powder sieving frame (2) swings up and down through the fixed seats (5), the bottom of the fixed seats (5) is provided with a fixed frame (6), the fixed frame (6) is fixed to the two ends of the inner wall of the powder sieving box (1), and the powder sieving frame (2) is installed inside the powder sieving box (1) through the connection with the fixed frame (6), and the powder sieving frame (2) Eccentric shafts (3) are symmetrically arranged on both sides of the upper end, a connecting rod (12) is arranged between the two eccentric shafts (3), and the connecting rod (12) passes through the inside of the powder screening frame (2) to connect and fix the two eccentric shafts (3), a rotating rod (4) is arranged on the outside of the eccentric shaft (3), and the rotating rod (4) is fixed to the inner wall of the powder screening box (1), and a first motor (10) is arranged on one side of the outer wall of the powder screening box (1), the first motor (10) drives one of the rotating rods (4) to drive the eccentric shaft (3) to rotate, and the eccentric shaft (3) drives the powder screening frame (2) to swing slightly up and down inside the powder screening box (1), and a feeding hopper (13) is arranged at the upper end of the powder screening box (1).

2. A 3D printing material powder screening device according to claim 1, characterized in that: The upper end of the interior of the fixing frame (6) is integrally formed with a slide groove (8), and the bottom of the fixing seat (5) is slidably engaged in the interior of the slide groove (8). The front and rear ends of the interior of the slide groove (8) are both provided with springs (9), and the springs (9) are connected to the front and rear ends of the bottom of the fixing seat (5).

3. A 3D printing material powder screening device according to claim 1, characterized in that: A connecting hose (14) is provided between the feed hopper (13) and the powder screening frame (2), and the connecting hose (14) seals and connects the bottom of the feed hopper (13) and the front end of the inside of the powder screening frame (2).

4. A 3D printing material powder screening device according to claim 1, characterized in that: The front end of the powder screening box (1) is provided with a first discharge port (7), and the first discharge port (7) passes through the interior of the powder screening box (1) and extends to below the bottom outlet of the powder screening frame (2).

5. The material powder screening device for 3D printing according to claim 1, characterized in that: A conveyor belt (15) is provided at the inner bottom end of the powder screening box (1), and the conveyor belt (15) is located below the screen (11); the conveyor belt (15) is installed at the inner bottom end of the powder screening box (1) through a support frame (16); a second motor (19) is provided on the outer side of one of the support frames (16), and the second motor (19) drives a transmission roller to drive the conveyor belt (15) to rotate toward the rear end of the powder screening box (1); a second discharge port (18) is provided at the rear end of the powder screening box (1), and the second discharge port (18) passes through the interior of the powder screening box (1) and extends to below the rear end of the conveyor belt (15).

6. A 3D printing material powder screening device according to claim 1, characterized in that: Baffles (17) are symmetrically arranged on both sides of the powder screening box (1), the baffles (17) are fixed inside the powder screening box (1) through connecting pieces, and the inner sides of the baffles (17) are attached to the left and right sides of the powder screening frame (2) and the conveyor belt (15).

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