3D printing raw material premixing device

Abstract

The invention belongs to the technical field of 3D printing, and particularly discloses a 3D printing raw material premixing device which comprises a feeding port and a mixing box, the feeding port communicates with the mixing box through a feeding assembly, the mixing box is sequentially divided into a primary mixing chamber, a turning and stirring chamber and a uniform stirring chamber from top to bottom, a vertical rotating shaft is arranged in the primary mixing chamber, and a scraping plate is arranged at the bottom of the vertical rotating shaft; a transverse rotating shaft is arranged in the turning and stirring chamber, a plurality of turning and stirring shovels are arranged on the transverse rotating shaft, the bottom of the turning and stirring chamber is communicated with the uniform stirring chamber through a discharging opening, a stirring shaft is arranged in the uniform stirring chamber, and stirring blades are arranged on the stirring shaft. According to the 3D printing raw material premixing device, raw materials needing to be mixed are preliminarily mixed by arranging the primary mixing chamber in the mixing box, the raw materials are turned and stirred uniformly under the action of a turning and stirring shovel by arranging the turning and stirring chamber, and the raw materials are uniformly stirred by arranging the uniform stirring chamber; the problem of non-uniform stirring of raw materials is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printing raw material premixing device. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses bondable materials such as powdered metal or plastic to construct objects by printing layer by layer. The production of bondable materials requires multiple steps, including raw material reaction, and the raw materials often need to be mixed before the raw material reaction.

[0003] The current mixing method is to put the raw materials into the mixing bucket one by one and mix them by stirring. This has the following disadvantages: because the raw materials are added one by one, the raw materials added first are concentrated in the lower part after stirring, and the materials added later are concentrated in the upper part. Even after stirring, there may be uneven stirring. Therefore, a mixing device that improves the uniformity of stirring is needed. Summary of the invention

[0004] The purpose of the present invention is to provide a 3D printing raw material premixing device, which solves the problem of uneven raw material mixing in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides a 3D printing raw material premixing device, comprising a feed port and a mixing box, the feed port is connected with the mixing box through a feed assembly, the mixing box is divided into a primary mixing chamber, a turning chamber, and a mixing chamber from top to bottom, a vertical rotating shaft is provided in the primary mixing chamber, a scraper is provided at the bottom of the vertical rotating shaft, a horizontal rotating shaft is provided in the turning chamber, a plurality of turning shovels are provided on the horizontal rotating shaft, the bottom of the turning chamber is connected with the mixing chamber through a feed port, a stirring shaft is provided inside the mixing chamber, and a stirring blade is provided on the stirring shaft.

[0006] Preferably, the feed assembly includes a feed pipe and a feed auger, the feed auger includes a transmission rod and a spiral blade, the spiral blade is spirally wound and fixed on the transmission rod, one end of the transmission rod is rotatably connected to the inner wall of the feed pipe, and the other end thereof penetrates the inner wall of the feed pipe and extends to the outside of the feed pipe, one end of the transmission rod extending to the outside of the feed pipe is provided with a motor for controlling the rotation of the transmission rod, a plurality of evenly distributed dispersion ports are provided at the bottom of the feed pipe, and the feed pipe is connected with the mixing box through the dispersion ports.

[0007] Preferably, the two ends of the vertical rotating shaft are rotatably connected to the top and bottom of the primary mixing chamber respectively, a gear 1 is provided on the top of the vertical rotating shaft, and a gear 2 meshing with the gear 1 is provided on one side of the gear 1.

[0008] Preferably, the second gear is rotatably connected to the top of the primary mixing chamber, a second motor for controlling the rotation of the second gear is provided at the bottom of the second gear, and an output end of the second motor is connected to the second gear.

[0009] Preferably, the bottom of the scraper is in sliding contact with the bottom of the primary mixing chamber, and an auxiliary plate is provided on one side wall of the scraper. The auxiliary plate is obliquely connected to the side wall of the scraper, and the angle between the auxiliary plate and the side wall of the scraper is 10-60°.

[0010] Preferably, a plurality of evenly distributed mesh holes are provided at the bottom of the primary mixing chamber, a mounting hole for mounting a vertical rotating shaft is provided at the bottom of the primary mixing chamber, and the primary mixing chamber is connected with the stirring chamber through the mesh holes.

[0011] Preferably, one end of the transverse rotating shaft is rotatably connected to the inner wall of the mixing chamber, and the other end thereof passes through the inner wall of the mixing chamber and extends to the outer side of the mixing chamber. One end of the transverse rotating shaft extending to the outer side of the mixing chamber is provided with a motor three for controlling the rotation of the transverse rotating shaft.

[0012] Preferably, the plurality of stirring shovels are evenly distributed along the circumference of the transverse rotation axis, and the stirring shovels are arranged in an arc shape, a rubber edge is provided on the side of the stirring shovel away from the transverse rotation axis, and the side of the stirring shovel provided with the rubber edge is in sliding contact with the bottom of the stirring chamber.

[0013] Preferably, the upper and lower ends of the stirring shaft are rotatably connected to the top and bottom of the stirring chamber respectively, and the stirring blades are provided with two groups, and the two groups of stirring blades are installed on the stirring shaft perpendicular to each other, and the front ends of the stirring blades are arranged in an arc shape.

[0014] Preferably, a box door is provided on the outer side of the mixing box, and a handle is provided on the box door.

[0015] The advantages and beneficial effects of the present invention using the above-mentioned 3D printing raw material premixing device are:

[0016] 1. The present invention provides a primary mixing chamber in the mixing box to preliminarily mix the raw materials to be mixed, and the scraper scrapes the raw material powder through the mesh holes at the bottom of the primary mixing chamber into the stirring chamber. By providing the stirring chamber, the raw materials are stirred evenly under the action of the stirring shovel, and the raw materials are stirred evenly by providing the stirring chamber, thereby solving the problem of uneven stirring of the raw materials.

[0017] 2. The present invention transports the raw materials into the mixing box through the feed auger of the feed assembly to avoid the raw materials blocking the feed port and also to avoid the occurrence of feed interruption. Multiple dispersion ports disperse the raw materials into the mixing box, which is conducive to uniform stirring of the raw materials.

[0018] 3. The present invention arranges a scraper to scrape the raw materials so that the raw materials are not easy to block the mesh holes and disperse the raw materials into the mixing chamber. The auxiliary plate is arranged to break up the raw materials stacked on the bottom of the primary mixing chamber under the action of rotation, which is conducive to the raw materials leaking through the mesh holes. The mixing shovel is arranged to mix the raw materials evenly under the action of the horizontal rotating shaft. The arc-shaped mixing shovel is conducive to scooping up the raw materials for mixing. The rubber edge reduces the wear of the mixing shovel when it contacts the bottom of the mixing chamber.

[0019] 4. The present invention can accelerate the stirring of raw materials by arranging two groups of stirring blades that are vertically staggered up and down, so that the upper and bottom parts of the raw materials can be stirred by the stirring blades, which is beneficial to uniformly stirring the raw materials. The arc-shaped front end of the stirring blade reduces the stirring resistance, which is beneficial to smooth stirring.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the interior of a mixing box in a 3D printing raw material premixing device of the present invention;

[0022] Figure 2 It is an overall schematic diagram of a 3D printing raw material premixing device of the present invention;

[0023] Figure 3 It is a top view of a horizontal rotation axis in a 3D printing raw material premixing device of the present invention;

[0024] Figure 4 It is a schematic diagram of the connection between a single stirring shovel and a horizontal rotation shaft in a 3D printing raw material premixing device of the present invention;

[0025] Figure 5 It is a schematic diagram of the bottom of a primary mixing chamber in a 3D printing raw material premixing device of the present invention;

[0026] Figure 6 It is a schematic diagram of a stirring blade in a 3D printing raw material premixing device of the present invention;

[0027] Figure 7 It is a schematic diagram of a scraper in a 3D printing raw material premixing device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 1. Feeding port; 2. Feeding pipe; 3. Spiral blade; 4. Transmission rod; 5. Dispersion port; 6. Vertical rotating shaft; 7. Scraper; 8. Horizontal rotating shaft; 9. Turning shovel; 10. Feeding port; 11. Stirring blade; 12. Stirring shaft; 13. Mixing chamber; 14. Motor three; 15. Turning chamber; 16. Primary mixing chamber; 17. Mixing box; 18. Motor one; 19. Motor two; 20. Box door; 21. Mesh; 22. Bottom of primary mixing chamber; 23. Rubber edge; 24. Auxiliary plate. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0031] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] Example 1

[0033] like Figure 1 As shown, a 3D printing raw material premixing device includes a feed port 1 and a mixing box 17. The feed port 1 is connected to the mixing box 17 through a feed assembly. The mixing box 17 is divided into a primary mixing chamber 16, a stirring chamber 15, and a mixing chamber 13 from top to bottom. By setting the primary mixing chamber 16 in the mixing box 17, the raw materials to be mixed are preliminarily mixed, and the scraper 7 scrapes the raw material powder through the mesh 21 at the bottom of the primary mixing chamber 16 to enter the stirring chamber 15. By setting the stirring chamber 15, the raw materials are stirred under the action of the stirring shovel 9 to make the raw materials stir evenly. By setting the stirring chamber 13, the raw materials are stirred evenly, thereby solving the problem of uneven stirring of the raw materials.

[0034] The feeding assembly includes a feeding pipe 2 and a feeding auger. The feeding auger includes a transmission rod 4 and a spiral blade 3. The spiral blade 3 is spirally wound and fixed on the transmission rod 4. One end of the transmission rod 4 is rotatably connected to the inner wall of the feeding pipe 2, and the other end thereof penetrates the inner wall of the feeding pipe 2 and extends to the outside of the feeding pipe 2. One end of the transmission rod 4 extending to the outside of the feeding pipe 2 is provided with a motor 18 for controlling the rotation of the transmission rod 4. A plurality of evenly distributed dispersion ports 5 are provided at the bottom of the feeding pipe 2, and the feeding pipe 2 is connected to the mixing box 17 through the dispersion ports 5.

[0035] The rotation of the motor 18 drives the transmission rod 4 to rotate, and drives the spiral blade 3 to rotate. The spiral blade 3 transports the raw materials from the feed port 1 to the feed pipe 2. The dispersion port 5 at the bottom of the feed pipe 2 preliminarily disperses the raw materials into the mixing box 17. The raw materials are transported into the mixing box 17 through the feed auger of the feed assembly to prevent the raw materials from blocking the feed port 1, and also to prevent the occurrence of feed interruption. Multiple dispersion ports 5 disperse the raw materials into the mixing box 17, which is conducive to uniform mixing of the raw materials.

[0036] A vertical rotating shaft 6 is provided in the primary mixing chamber 16, and the two ends of the vertical rotating shaft 6 are respectively rotatably connected to the top and bottom of the primary mixing chamber 16. A gear 1 is provided on the top of the vertical rotating shaft 6, and a gear 2 meshing with the gear 1 is provided on one side of the gear 1. The gear 2 is rotatably connected to the top of the primary mixing chamber 16, and a motor 2 19 for controlling the rotation of the gear 2 is provided at the bottom of the gear 2, and the output end of the motor 2 19 is connected to the gear 2. Figure 5 As shown, a scraper 7 is provided at the bottom of the vertical rotating shaft 6, a plurality of evenly distributed mesh holes 21 are provided at the bottom 22 of the primary mixing chamber, a mounting hole for mounting the vertical rotating shaft 6 is provided at the bottom 22 of the primary mixing chamber, and the primary mixing chamber 16 is connected to the stirring chamber 15 through the mesh holes 21.

[0037] The output end of the motor is connected to each component using the existing technology. The motor 2 19 drives the gear 2 to rotate, and the rotation of the gear 2 drives the gear 1 to rotate, thereby driving the vertical rotating shaft 6 to rotate, and the vertical rotating shaft 6 rotates, driving the scraper 7 to rotate, so that the scraper 7 scrapes the raw materials at the bottom 22 of the primary mixing chamber through the mesh 21 into the stirring chamber 15. By setting the scraper 7 to scrape the raw materials, the raw materials are not easy to block the mesh 21, and the raw materials are dispersed into the stirring chamber 15.

[0038] like Figure 7 As shown, the bottom of the scraper 7 is in sliding contact with the bottom 22 of the primary mixing chamber, and an auxiliary plate 24 is provided on one side wall of the scraper 7. The auxiliary plate 24 is obliquely connected to the side wall of the scraper 7, and the angle between the auxiliary plate 24 and the side wall of the scraper 7 is 10-60 degrees. By providing the auxiliary plate 24, the raw materials stacked on the bottom of the primary mixing chamber 16 are broken up under the action of rotation, which is conducive to the raw materials leaking through the mesh 21.

[0039] A horizontal rotating shaft 8 is provided in the mixing chamber 15, and a plurality of mixing shovels 9 are provided on the horizontal rotating shaft 8. The bottom of the mixing chamber 15 is connected to the mixing chamber 13 through the feeding port 10. One end of the horizontal rotating shaft 8 is rotatably connected to the inner wall of the mixing chamber 15, and the other end thereof penetrates the inner wall of the mixing chamber 15 and extends to the outside of the mixing chamber 15. One end of the horizontal rotating shaft 8 extending to the outside of the mixing chamber 15 is provided with a motor 3 14 for controlling the rotation of the horizontal rotating shaft 8. Figure 3 and Figure 4 As shown, a plurality of stirring shovels 9 are evenly distributed along the circumference of the transverse rotation axis 8, and the stirring shovels 9 are arranged in an arc shape. A rubber edge 23 is arranged on the side of the stirring shovel 9 away from the transverse rotation axis 8, and the side of the stirring shovel 9 provided with the rubber edge 23 is in sliding contact with the bottom of the stirring chamber 15. The rotation of the motor 3 14 drives the transverse rotation axis 8 to rotate, thereby driving the stirring shovel 9 to rotate. The stirring shovel 9 rotates to scoop up the raw materials at the bottom of the stirring chamber 15. During the rotation of the stirring shovel 9, the raw materials fall under the action of gravity, playing a stirring role. The arc-shaped stirring shovel 9 is conducive to scooping up the raw materials for stirring, and the rubber edge 23 reduces the wear of the stirring shovel 9 when it contacts the bottom of the stirring chamber 15.

[0040] like Figure 6As shown, a stirring shaft 12 is provided inside the mixing chamber 13, and a stirring blade 11 is provided on the mixing shaft 12. The upper and lower ends of the mixing shaft 12 are respectively connected to the top and bottom of the mixing chamber for rotation. There are two groups of stirring blades 11, and the two groups of stirring blades 11 are installed on the mixing shaft 12 perpendicularly to each other, and the front end of the stirring blade 11 is set in an arc shape. By setting two groups of stirring blades 11 vertically staggered up and down, the stirring of the raw materials can be accelerated, so that the upper and bottom of the raw materials can be stirred by the stirring blades 11, which is conducive to the uniform stirring of the raw materials. The front end arc of the stirring blade 11 reduces the stirring resistance, which is conducive to the smooth stirring. The rotation principle of the stirring shaft 12 is consistent with the vertical rotating shaft 6. The gear at the output end of the motor is driven by the motor, and the gear is meshed with another gear at the bottom of the stirring shaft 12, thereby driving the stirring shaft 12 to rotate. A discharge port is provided at the bottom of the mixing chamber 13.

[0041] like Figure 2 As shown, a door 20 is provided on the outside of the mixing box 17, and a handle is provided on the door 20. The primary mixing chamber 16, the stirring chamber 15, and the mixing chamber 13 are respectively provided with corresponding doors 20 and handles.

[0042] Therefore, the present invention adopts the above-mentioned 3D printing raw material premixing device, and sets a primary mixing chamber in the mixing box to preliminarily mix the raw materials to be mixed. The scraper scrapes the raw material powder through the mesh holes at the bottom of the primary mixing chamber into the stirring chamber. By setting the stirring chamber, the raw materials are stirred evenly under the action of the stirring shovel. By setting the stirring chamber, the raw materials are stirred evenly, thereby solving the problem of uneven stirring of the raw materials.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A 3D printing raw material premixing device, characterized in that: The utility model comprises a feed port and a mixing box, wherein the feed port is connected with the mixing box through a feed assembly, and the mixing box is divided into a primary mixing chamber, a turning mixing chamber and a homogenizing chamber from top to bottom in sequence, wherein a vertical rotating shaft is arranged in the primary mixing chamber, a scraper is arranged at the bottom of the vertical rotating shaft, a horizontal rotating shaft is arranged in the turning mixing chamber, a plurality of turning mixing shovels are arranged on the horizontal rotating shaft, the bottom of the turning mixing chamber is connected with the homogenizing chamber through a feed port, a stirring shaft is arranged in the homogenizing chamber, and a stirring blade is arranged on the stirring shaft.

2. A 3D printing raw material premixing device according to claim 1, characterized in that: The feeding assembly includes a feeding pipe and a feeding auger. The feeding auger includes a transmission rod and a spiral blade. The spiral blade is spirally wound and fixed on the transmission rod. One end of the transmission rod is rotatably connected to the inner wall of the feeding pipe, and the other end thereof penetrates the inner wall of the feeding pipe and extends to the outside of the feeding pipe. One end of the transmission rod extending to the outside of the feeding pipe is provided with a motor for controlling the rotation of the transmission rod. A plurality of evenly distributed dispersion ports are provided at the bottom of the feeding pipe, and the feeding pipe is connected with the mixing box through the dispersion ports.

3. A 3D printing raw material premixing device according to claim 1, characterized in that: The two ends of the vertical rotating shaft are respectively connected to the top and the bottom of the primary mixing chamber for rotation. The top of the vertical rotating shaft is provided with a gear 1, and one side of the gear 1 is provided with a gear 2 meshing with the gear 1.

4. A 3D printing raw material premixing device according to claim 3, characterized in that: The second gear is rotatably connected to the top of the primary mixing chamber, and a second motor for controlling the rotation of the second gear is provided at the bottom of the second gear, and the output end of the second motor is connected to the second gear.

5. A 3D printing raw material premixing device according to claim 1, characterized in that: The bottom of the scraper is in sliding contact with the bottom of the primary mixing chamber. An auxiliary plate is provided on one side wall of the scraper. The auxiliary plate is obliquely connected to the side wall of the scraper. The angle between the auxiliary plate and the side wall of the scraper is 10-60°.

6. A 3D printing raw material premixing device according to claim 1, characterized in that: The bottom of the primary mixing chamber is provided with a plurality of evenly distributed mesh holes, the bottom of the primary mixing chamber is provided with a mounting hole for mounting a vertical rotating shaft, and the primary mixing chamber is communicated with the stirring chamber through the mesh holes.

7. A 3D printing raw material premixing device according to claim 1, characterized in that: One end of the horizontal rotation shaft is rotatably connected to the inner wall of the mixing chamber, and the other end thereof penetrates the inner wall of the mixing chamber and extends to the outer side of the mixing chamber. One end of the horizontal rotation shaft extending to the outer side of the mixing chamber is provided with a motor three for controlling the rotation of the horizontal rotation shaft.

8. A 3D printing raw material premixing device according to claim 1, characterized in that: The plurality of stirring shovels are evenly distributed along the circumference of the transverse rotation axis, and are arranged in an arc shape. A rubber edge is arranged on the side of the stirring shovel away from the transverse rotation axis, and the side of the stirring shovel with the rubber edge is in sliding contact with the bottom of the stirring chamber.

9. A 3D printing raw material premixing device according to claim 1, characterized in that: The upper and lower ends of the stirring shaft are rotatably connected to the top and bottom of the stirring chamber respectively. The stirring blades are provided with two groups, and the two groups of stirring blades are installed on the stirring shaft perpendicularly to each other, and the front ends of the stirring blades are arranged in an arc shape.

10. A 3D printing raw material premixing device according to claim 1, characterized in that: A box door is arranged on the outer side of the mixing box, and a handle is arranged on the box door.

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