Screening machine for 3D printing and using method thereof

Abstract

The invention discloses a powder screening machine for 3D printing and a using method thereof.The powder screening machine comprises a material collecting box, a powder screening box, a telescopic structure, an air supply mechanism, a screening plate and a vertical moving mechanism, vibration motors are fixedly installed on the two sides of the top of the material collecting box correspondingly, and the powder screening box is vertically and fixedly installed on the tops of the output ends of the two vibration motors; the number of the telescopic structures is four, the four telescopic structures are arranged at the four corners between the material collecting box and the powder screening box correspondingly, the air supply mechanism is used for supplying air into the powder screening box, the screening plate is horizontally arranged in the powder screening box and slidably connected in the powder screening box in the vertical direction, and the up-down moving mechanism is used for driving the screening plate to move up and down. The powder screening box and the screening plate shake up and down at the same time, the effect of raising 3D printing powder is better in cooperation with spiral airflow, the 3D printing powder is prevented from being stacked at the top of the screening plate, and the screening efficiency is higher; and powder raising is stopped while powder screening is stopped, the powder can be taken out without waiting, and the material taking time is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing post-processing, and in particular to a powder sifter for 3D printing and a method for using the same. Background Art

[0002] 3D printing equipment is a mechanical device produced based on 3D printing technology. 3D printing is achieved by using digital technology material printers. It is often used to make models in the fields of mold manufacturing, industrial design, etc., and later gradually used for the direct manufacturing of some products. 3D printing also includes some post-processing processes, including processing the powder collected after printing, which is mainly sifted by a powder sifter.

[0003] However, the existing powder sifting machine for 3D printing only uses a vibration motor to drive the sieve plate to vibrate up and down to sieve the powder, resulting in poor powder sifting effect and low efficiency; and the existing powder sifting machine for 3D printing will stir up dust inside when sifting powder, and then it takes a while to take out the sieved powder, which wastes time. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a powder sifter for 3D printing and a method of using the same.

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

[0006] A powder screening machine for 3D printing, comprising: a material collection box and a powder screening box, wherein vibration motors are fixedly installed on both sides of the top of the material collection box, and the powder screening box is vertically fixedly installed on the top of the output ends of the two vibration motors;

[0007] A telescopic structure, wherein four telescopic structures are provided, and the four telescopic structures are respectively arranged at four corners between the aggregate box and the powder screening box;

[0008] An air supply mechanism, the air supply mechanism is used to provide air into the powder screening box;

[0009] A sieve plate, the sieve plate is horizontally arranged inside the powder sieving box and is vertically slidably connected inside the powder sieving box;

[0010] The up and down moving mechanism is used to drive the screen plate to move up and down.

[0011] As a further technical solution of the present invention, a feed port is provided on the top of the powder screening box, and a top cover is provided on the feed port, a first side door is hinged on the upper side of the outer side of the powder screening box, a second side door is hinged on the outer side of the powder screening box, and a controller is fixedly installed on the outer side of the powder screening box.

[0012] As a further technical solution of the present invention, a discharge port is opened at the bottom center of the powder screening box, an electric door is installed at the connecting part of the discharge port and the powder screening box, slopes are welded around the inner bottom of the powder screening box, and the four slopes are all inclined toward the discharge port.

[0013] As a further technical solution of the present invention, the discharge port passes through the top of the aggregate box and is slidably connected to the aggregate box. Air outlet holes are opened above both sides of the outside of the aggregate box, and there are multiple air outlet holes that are evenly distributed in a rectangular array above both sides of the outside of the aggregate box.

[0014] As a further technical solution of the present invention, the telescopic structure includes a sleeve column and a telescopic rod. The sleeve column is vertically welded to the top of the aggregate box, the telescopic rod is inserted into the sleeve column and slidably connected to the sleeve column, the top of the telescopic rod is welded to the bottom of the powder screening box, and a spring is vertically welded between the bottom of the sleeve column and the bottom of the telescopic rod.

[0015] As a further technical solution of the present invention, the air supply mechanism includes a fan and an annular pipe, the fan is fixedly installed on the top of the powder screening box, the air outlet of the fan is connected to the air supply pipe, a mounting plate is horizontally welded on the top of the powder screening box, the annular pipe passes through the mounting plate and is fixedly connected to the mounting plate, the other end of the air supply pipe extends into the powder screening box and is connected to the annular pipe, the bottom of the annular pipe is obliquely connected to a branch pipe, and a plurality of branch pipes are provided and are evenly distributed along the circumference of the bottom of the annular pipe.

[0016] As a further technical solution of the present invention, the up and down moving mechanism includes a contact block, and a rotating shaft is horizontally connected to the powder screening box. Two contact blocks are provided, and the two contact blocks are welded to the rotating shaft. The two contact blocks are respectively abutted against the two sides of the bottom of the screen plate, one end of the rotating shaft extends from the inside of the powder screening box and is welded with a gear, and a rack is vertically welded on the top of the aggregate box, and the rack is meshed with the gear.

[0017] A method for using a powder sifter for 3D printing comprises the following specific steps:

[0018] S1: Add 3D printing powder into the powder screening box from the feed port, close the top cover, and start the two vibration motors to drive the powder screening box to vibrate up and down;

[0019] S2: When the powder sifting box vibrates up and down, it drives the gear to move up and down. Because the gear and the rack are meshing, the gear rotates back and forth in the positive and negative directions during the up and down movement, and the gear drives the rotating shaft to rotate back and forth in the positive and negative directions.

[0020] S3: The rotating shaft drives the two abutment blocks to rotate back and forth in the positive and negative directions. When the short side of the abutment block is vertically abutted against the sieve plate, it is at the lowest position. When the abutment block rotates upward in the positive or negative direction, the long side of the abutment block abuts against the sieve plate to lift it upward until the long side of the abutment block abuts against the sieve plate and it is at the highest position. When the abutment block rotates downward again, the sieve plate loses the abutment force and moves downward under the action of gravity, thus driving the sieve plate to move up and down reciprocatingly;

[0021] S4: Start the fan at the same time to let the air flow from the air supply pipe into the annular pipe, and then form a spiral air flow downward through multiple branch pipes to flow into the powder screening box;

[0022] S5: The powder screening box and the screen plate shake up and down at the same time and cooperate with the spiral airflow to lift the 3D printed powder, so as to screen it;

[0023] The powder screening box and the sieve plate shake up and down at the same time, and the spiral airflow is better for lifting the 3D printed powder, preventing the 3D printed powder from accumulating on the top of the sieve plate, making the screening efficiency higher.

[0024] S6: The screened powder slides down the slope to the electric door and enters the discharge port, and then enters the collecting box through the discharge port for collection, and the wind is discharged through multiple air outlets;

[0025] S7: The first side door can be opened to take out the powder that has not been screened out on the sieve plate, and the second side door can be opened to take out the powder that has been screened out in the aggregate box.

[0026] When the screening is completed, the vibration motor is turned off to stop the up and down vibration, and the airflow raised by the 3D printed powder enters the aggregate box together with the screened powder. The airflow is discharged through multiple air outlets. At this time, the fan is turned off, and the screened powder remains in the aggregate box, and the unscreened powder remains on the sieve plate, so that the powder is stopped from being lifted at the same time as the screening, and the powder can be taken out without waiting, saving material retrieval time.

[0027] The beneficial effects of the present invention are as follows: the powder screening box and the sieve plate shake up and down at the same time and cooperate with the spiral airflow to better lift the 3D printed powder, prevent the 3D printed powder from accumulating on the top of the sieve plate, and make the screening efficiency higher; stop lifting the powder at the same time as stopping the powder screening, and the powder can be taken out without waiting, saving the material taking time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a powder sifter for 3D printing proposed by the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a powder sifter for 3D printing proposed by the present invention;

[0030] Figure 3This is a schematic diagram of the structure of a powder sifter for 3D printing proposed by the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a powder sifter for 3D printing proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of a powder sifter for 3D printing proposed by the present invention;

[0033] Figure 6 This is a schematic structural diagram of a powder sifter for 3D printing proposed by the present invention.

[0034] In the figure: 1. feed inlet; 2. first side door; 3. vibration motor; 4. second side door; 5. collection box; 6. air outlet; 7. sleeve column; 8. telescopic rod; 9. powder screening box; 10. fan; 11. air supply duct; 12. controller; 13. rotating shaft; 14. gear; 15. rack; 16. discharge port; 17. branch pipe; 18. annular pipe; 19. mounting plate; 20. spring; 21. sieve plate; 22. abutment block; 23. electric door; 24. ramp. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] Please refer to the attached Figure 1 -Attached Figure 6 A powder screening machine for 3D printing includes: a material collecting box 5 and a powder screening box 9, both sides of the top of the material collecting box 5 are fixedly installed with vibration motors 3, and the powder screening box 9 is vertically fixedly installed on the top of the output ends of the two vibration motors 3;

[0037] Telescopic structure, there are four telescopic structures, and the four telescopic structures are respectively arranged at the four corners between the aggregate box 5 and the powder screening box 9;

[0038] An air supply mechanism, the air supply mechanism is used to provide air to the powder screening box 9;

[0039] The sieve plate 21 is horizontally arranged inside the powder sieving box 9 and is vertically slidably connected inside the powder sieving box 9;

[0040] The up-and-down moving mechanism is used to drive the screen plate 21 to move up and down.

[0041] Please refer to the attached Figure 1 and 2In a preferred embodiment, a feed port 1 is provided at the top of the powder screening box 9, and a top cover is provided on the feed port 1, a first side door 2 is hingedly provided on the upper side of the outer side of the powder screening box 9, a second side door 4 is hingedly provided on the outer side of the powder screening box 9, and a controller 12 is fixedly installed on the outer side of the powder screening box 9.

[0042] Please refer to the attached Figure 3 and 5 In a preferred embodiment, a discharge port 16 is opened at the bottom center of the powder screening box 9, an electric door 23 is installed at the connecting part of the discharge port 16 and the powder screening box 9, and slopes 24 are welded around the inner bottom of the powder screening box 9, and the four slopes 24 are all inclined toward the discharge port 16.

[0043] Please refer to the attached Figure 3 and 5 In a preferred embodiment, the discharge port 16 passes through the top of the aggregate box 5 and is slidably connected to the aggregate box 5. Air outlet holes 6 are provided above both sides of the outside of the aggregate box 5, and there are multiple air outlet holes 6 that are evenly distributed in a rectangular array above both sides of the outside of the aggregate box 5.

[0044] Please refer to the attached Figure 1 and 4 In a preferred embodiment, the telescopic structure includes a sleeve column 7 and a telescopic rod 8. The sleeve column 7 is vertically welded to the top of the aggregate box 5. The telescopic rod 8 is inserted into the sleeve column 7 and is slidably connected to the sleeve column 7. The top of the telescopic rod 8 is welded to the bottom of the powder screening box 9, and a spring 20 is vertically welded between the bottom of the sleeve column 7 and the bottom of the telescopic rod 8.

[0045] Please refer to the attached Figure 1 and 3 In a preferred embodiment, the air supply mechanism includes a fan 10 and an annular pipe 18. The fan 10 is fixedly installed on the top of the powder screening box 9. The air outlet of the fan 10 is connected to the air supply pipe 11. A mounting plate 19 is horizontally welded on the top of the powder screening box 9. The annular pipe 18 passes through the mounting plate 19 and is fixedly connected to the mounting plate 19.

[0046] Please refer to the attached Figure 1 and 3 In a preferred embodiment, the other end of the air supply pipe 11 extends into the powder screening box 9 and is connected to the annular pipe 18. The bottom of the annular pipe 18 is obliquely connected to a branch pipe 17. There are multiple branch pipes 17 that are evenly distributed along the circumference of the bottom of the annular pipe 18.

[0047] Please refer to the attached Figure 2 , 5And 6, in a preferred embodiment, the up and down moving mechanism includes abutment blocks 22, and the powder screening box 9 is horizontally connected to the rotating shaft 13. Two abutment blocks 22 are provided, and the two abutment blocks 22 are welded to the rotating shaft 13, and the two abutment blocks 22 are respectively abutted against the two sides of the bottom of the sieve plate 21.

[0048] Please refer to the attached Figure 2 , 5 And 6, in a preferred embodiment, one end of the rotating shaft 13 extends from the inside of the powder screening box 9 and is welded with a gear 14, and a rack 15 is vertically welded to the top of the collecting box 5, and the rack 15 is meshed with the gear 14.

[0049] A method for using a powder sifter for 3D printing comprises the following specific steps:

[0050] S1: Add the 3D printing powder into the powder screening box 9 from the feed port 1, close the top cover, and start the two vibration motors 3 to drive the powder screening box 9 to vibrate up and down;

[0051] S2: The powder sifting box 9 drives the gear 14 to move up and down when vibrating up and down. Since the gear 14 and the rack 15 are meshed, the gear 14 reciprocates in the forward and reverse directions during the up and down movement, and the gear 14 drives the rotating shaft 13 to reciprocate in the forward and reverse directions.

[0052] S3: The rotating shaft 13 drives the two abutment blocks 22 to rotate back and forth in the positive and negative directions. When the short side of the abutment block 22 is vertically abutted against the sieve plate 21, it is at the lowest position. When the abutment block 22 rotates upward in the positive or negative direction, the long side of the abutment block 22 abuts against the sieve plate 21 to lift it upward until the long side of the abutment block 22 abuts against the sieve plate 21 and it is at the highest position. When the abutment block 22 rotates downward again, the sieve plate 21 loses the abutment force and moves downward under the action of gravity, thus driving the sieve plate 21 to move up and down reciprocatingly.

[0053] S4: At the same time, the fan 10 is started to pass the air from the air supply pipe 11 into the annular pipe 18, and then the air flows downward through the multiple branch pipes 17 to form a spiral airflow into the powder screening box 9;

[0054] S5: The powder screening box 9 and the sieve plate 21 are shaken up and down at the same time and the spiral airflow is used to lift the 3D printed powder so as to screen it;

[0055] The powder screening box 9 and the sieve plate 21 shake up and down at the same time and cooperate with the spiral airflow to better lift the 3D printed powder, prevent the 3D printed powder from accumulating on the top of the sieve plate 21, and make the screening efficiency higher.

[0056] S6: The screened powder slides through the slope 24 to the electric door 23 and enters the discharge port 16, and then enters the collecting box 5 through the discharge port 16 for collection, and the wind is discharged through multiple air outlets 6;

[0057] S7: The first side door 2 can be opened to take out the powder that has not been screened out on the sieve plate 21, and the second side door 4 can be opened to take out the powder that has been screened out in the collecting box 5.

[0058] When the screening is completed, the vibration motor 3 is turned off to stop the up and down vibration, and the airflow raised by the 3D printed powder enters the collecting box 5 together with the screened powder, and the airflow is discharged through multiple air outlets 6. At this time, the fan 10 is turned off, and the screened powder remains in the collecting box 5, and the unscreened powder remains on the sieve plate 21, so that the powder is stopped from being raised at the same time as the screening, and the powder can be taken out without waiting, saving the material taking time.

[0059] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0060] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A powder sifter for 3D printing, characterized in that: include: A material collection box (5) and a powder screening box (9), wherein vibration motors (3) are fixedly mounted on both sides of the top of the material collection box (5), and the powder screening box (9) is vertically fixedly mounted on the top of the output ends of the two vibration motors (3); A telescopic structure, wherein four telescopic structures are provided, and the four telescopic structures are respectively arranged at four corners between the material collecting box (5) and the powder screening box (9); An air supply mechanism, the air supply mechanism being used to supply air into the powder screening box (9); A sieve plate (21), wherein the sieve plate (21) is horizontally arranged inside the powder sieve box (9) and is vertically slidably connected inside the powder sieve box (9); An up-and-down moving mechanism is used to drive the screen plate (21) to move up and down.

2. A powder sifter for 3D printing according to claim 1, characterized in that: The powder screening box (9) is provided with a feed inlet (1) at the top, and the feed inlet (1) is covered with a top cover, a first side door (2) is hingedly connected to the top of an outer side of the powder screening box (9), a second side door (4) is hingedly connected to an outer side of the powder screening box (9), and a controller (12) is fixedly installed on an outer side of the powder screening box (9).

3. A powder sifter for 3D printing according to claim 1, characterized in that: A discharge port (16) is provided at the center of the bottom of the powder screening box (9), an electric door (23) is installed at the connection portion between the discharge port (16) and the powder screening box (9), and slopes (24) are welded around the inner bottom of the powder screening box (9), and the four slopes (24) are all inclined toward the discharge port (16).

4. A powder sifter for 3D printing according to claim 3, characterized in that: The discharge port (16) passes through the top of the aggregate box (5) and is slidably connected to the aggregate box (5). Air outlet holes (6) are provided above both sides of the outside of the aggregate box (5), and there are multiple air outlet holes (6) that are evenly distributed in a rectangular array above both sides of the outside of the aggregate box (5).

5. A powder sifter for 3D printing according to claim 1, characterized in that: The telescopic structure comprises a sleeve column (7) and a telescopic rod (8), wherein the sleeve column (7) is vertically welded to the top of the aggregate box (5), the telescopic rod (8) is inserted into the sleeve column (7) and is slidably connected to the sleeve column (7), the top end of the telescopic rod (8) is welded to the bottom of the powder screening box (9), and a spring (20) is vertically welded between the bottom of the sleeve column (7) and the bottom of the telescopic rod (8).

6. A powder sifter for 3D printing according to claim 1, characterized in that: The air supply mechanism comprises a fan (10) and an annular tube (18); the fan (10) is fixedly mounted on the top of a powder screening box (9); an air outlet of the fan (10) is connected to an air supply tube (11); a mounting plate (19) is horizontally welded on the top of the powder screening box (9); and the annular tube (18) penetrates the mounting plate (19) and is fixedly connected to the mounting plate (19).

7. A powder sifter for 3D printing according to claim 6, characterized in that: The other end of the air supply pipe (11) extends into the powder screening box (9) and is connected to the annular pipe (18). The bottom of the annular pipe (18) is obliquely connected to a branch pipe (17). A plurality of branch pipes (17) are provided and are evenly distributed along the circumference of the bottom of the annular pipe (18).

8. A powder sifter for 3D printing according to claim 1, characterized in that: The up-and-down moving mechanism comprises a contact block (22), the powder screening box (9) is horizontally rotatably connected with a rotating shaft (13), two contact blocks (22) are provided, and both contact blocks (22) are welded to the rotating shaft (13), and the two contact blocks (22) are respectively in contact with the two sides of the bottom of the screen plate (21).

9. A powder sifter for 3D printing according to claim 8, characterized in that: One end of the rotating shaft (13) extends out from the inside of the powder screening box (9) and is welded with a gear (14); a rack (15) is vertically welded on the top of the collecting box (5); and the rack (15) is meshed with the gear (14).

10. A method for using a powder sifter for 3D printing, characterized in that: The specific steps include: S1: Add the powder for 3D printing into the powder screening box (9) from the feed inlet (1), close the top cover, and start the two vibration motors (3) to drive the powder screening box (9) to vibrate up and down; S2: When the powder screening box (9) vibrates up and down, it drives the gear (14) to move up and down. Since the gear (14) and the rack (15) are meshed, the gear (14) reciprocates in positive and negative rotations during the up and down movement. The gear (14) drives the rotating shaft (13) to reciprocate in positive and negative rotations. S3: The rotating shaft (13) drives the two abutting blocks (22) to rotate reciprocatingly in forward and reverse directions. When the short side of the abutting block (22) vertically abuts against the sieve plate (21), it is located at the lowest position. When the abutting block (22) rotates upward in the forward or reverse direction, the long side of the abutting block (22) abuts against the sieve plate (21) to lift it upward until the long side of the abutting block (22) abuts against the sieve plate (21) to be located at the highest position. When the abutting block (22) rotates downward again, the sieve plate (21) loses the abutting force and moves downward under the action of gravity, thereby driving the sieve plate (21) to reciprocate up and down. S4: simultaneously starting the fan (10) to pass air from the air supply pipe (11) into the annular pipe (18), and then passing the air downward through a plurality of branch pipes (17) to form a spiral airflow into the powder screening box (9); S5: The powder screening box (9) and the screen plate (21) are shaken up and down at the same time and the spiral airflow is coordinated to lift the 3D printing powder, thereby screening it; S6: The screened powder material slides along the slope (24) to the electric door (23) and enters the discharge port (16), and then enters the collecting box (5) through the discharge port (16) for collection, and the wind is discharged through a plurality of air outlets (6); S7: The first side door (2) can be opened to take out the powder material that has not been screened out on the sieve plate (21), and the second side door (4) can be opened to take out the powder material that has been screened out in the collecting box (5).

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