A material supply stirring device for 3D printing
By employing a design that integrates multiple mixing components, the problems of uneven material distribution and residue buildup on the inner wall of the mixing chamber are solved, achieving uniform material mixing and temperature control, thus improving the molding quality of 3D printing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI PARADIGM CHUANGZHI NEW MATERIAL TECHNOLOGY CO LTD
- Filing Date
- 2025-09-06
- Publication Date
- 2026-07-31
AI Technical Summary
Existing 3D printing material supply mixing devices use a single mixing method, resulting in uneven material distribution, the formation of tiny gel particles, and the accumulation of solidified material on the inner wall of the mixing chamber, which affects printing quality.
The design employs multiple mixing components working in tandem, including a motor-driven helical gear set, a mixing paddle, and a mixing rod, along with a scraper and a cutter. Power is transmitted through the meshing of the helical gears to achieve thorough mixing of materials and cleaning of the bin walls. It is combined with heating wires and an insulation shell to adapt to the mixing needs of different materials.
It improves the uniformity of material mixing, reduces the generation of tiny gel particles, lowers the risk of residue on the inner wall of the mixing chamber, ensures stable material temperature, and improves the molding quality of 3D printing.
Smart Images
Figure CN224576198U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of additive manufacturing technology, and in particular to a material supply and mixing device for 3D printing. Background Technology
[0002] In 3D printing technology, the uniformity and stable supply of materials directly affect the molding quality of the printed parts. If metal powder agglomerates, resin precipitates, or composite materials delaminate, defects such as porosity and uneven strength can easily occur in the printed parts. Therefore, material supply and mixing devices for 3D printing have emerged. They are mainly used in industrial manufacturing, aerospace, medical, and automotive fields. This device typically consists of a core structure and an auxiliary system: the core structure includes a stirring chamber, stirring components, and a drive unit; the auxiliary system includes a feeding channel. Its main function is to ensure the material composition is uniform and its state is stable through stirring, and then continuously deliver it to the printing head through the feeding channel, effectively reducing printing defects caused by material problems. At the same time, it is compatible with various printing materials such as metal powder, photosensitive resin, and composite materials, improving the compatibility of 3D printing equipment and the consistency of printed parts. Currently available material supply and mixing devices for 3D printing suffer from limited mixing methods, making it difficult to achieve a very uniform mixing of the internal raw materials. This results in the formation of tiny gel particles during the use of the materials, and these solidified substances accumulate on the inner wall of the mixing chamber. Therefore, a material supply and mixing device for 3D printing is proposed to address these issues. Utility Model Content
[0003] To overcome the above shortcomings, this utility model provides a material supply and stirring device for 3D printing, which aims to improve the problem of mediocre stirring effect and easy residue on the inner wall.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a material supply and stirring device for 3D printing, comprising a housing, a power chamber inside the housing, a motor fixedly connected inside the power chamber, a helical gear one fixedly connected to the output end of the motor, a stirring chamber inside the housing, a helical gear two rotatably connected to the top wall of the power chamber, a helical gear three rotatably connected to the bottom wall of the power chamber, the helical gear one meshing with the helical gear two, the helical gear one meshing with the helical gear three, a rotating shaft one fixedly connected to the outside of the helical gear two, multiple stirring paddles fixedly connected to the outside of the rotating shaft one, a rotating shaft two fixedly connected to the bottom of the helical gear three, multiple stirring rods fixedly connected to the outside of the rotating shaft two, and two cutters fixedly connected to the bottom wall of the stirring chamber.
[0005] As a further description of the above technical solution: The stirring rod is externally fixedly connected to multiple support columns, and a stop block is slidably connected inside the support columns. A base is fixedly connected to one side of the stop block, and a spring is fixedly connected to the other side of the stop block. A scraper is fixedly connected to the end of the base away from the stop block.
[0006] As a further description of the above technical solution: The outer shell is fitted with a heating wire, and an insulation shell is fixedly connected to the outside of the heating wire.
[0007] As a further description of the above technical solution: The bottom of the outer shell is fixedly connected to three legs, and the bottom of each leg is fixedly connected to a support plate.
[0008] As a further description of the above technical solution: A discharge pipe is fixedly connected to the bottom of the outer shell, the discharge pipe passes through the outer shell, a valve body is fixedly connected to the outside of the discharge pipe, and a valve is rotatably connected to the outside of the valve body.
[0009] As a further description of the above technical solution: The first rotating shaft is rotatably connected inside the second rotating shaft.
[0010] As a further description of the above technical solution: The top of the outer shell is rotatably connected to a feeding port, and a handle is fixedly connected to the top of the feeding port.
[0011] As a further description of the above technical solution: The scraper is slidably connected to the inner wall of the mixing chamber and abuts against the inner wall of the mixing chamber.
[0012] This utility model has the following beneficial effects: 1. In this utility model, the problem of uneven mixing is solved by the coordinated work of multiple stirring components. The motor drives the helical gear set to drive the stirring paddle and stirring rod to rotate synchronously. The stirring paddle performs basic mixing of the materials, and the stirring rod cooperates to stir from different angles, which can completely break up material agglomerates. At the same time, the cutter on the bottom wall of the stirring chamber can cut the lumps formed during stirring, avoid the generation of tiny gel particles, and effectively improve the uniformity of material mixing.
[0013] 2. In this utility model, the scraper on the stirring rod always adheres to the bin wall under the action of the spring. As the stirring rod rotates, it can scrape off the residual material on the bin wall in real time. Moreover, the scraper has a certain self-adaptive function due to the action of the spring, which reduces the possibility of the scraper being damaged. If the material needs to be temperature controlled, the heating wire outside the shell can heat the material. The heat preservation shell reduces heat loss and maintains a stable temperature, further adapting to the stirring needs of different materials and reducing the potential risks of material use. Attached Figure Description
[0014] Figure 1 A three-dimensional schematic diagram of a material supply and stirring device for 3D printing proposed in this utility model; Figure 2 A schematic diagram of the heating wire of a material supply and stirring device for 3D printing proposed in this utility model; Figure 3 A schematic diagram of the structure of a stirring paddle for a material supply and stirring device for 3D printing proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the valve body of a material supply stirring device for 3D printing proposed in this utility model.
[0015] Legend: 1. Outer shell; 2. Power chamber; 3. Mixing chamber; 4. Motor; 5. Helical gear one; 6. Helical gear two; 7. Helical gear three; 8. Shaft one; 9. Shaft two; 10. Mixing rod; 11. Support column; 12. Abutment block; 13. Spring; 14. Base; 15. Scraper; 16. Mixing paddle; 17. Cutter; 18. Discharge pipe; 19. Valve body; 20. Valve; 21. Heating wire; 22. Insulation shell; 23. Feed port; 24. Handle; 25. Support leg; 26. Support plate. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] Reference Figure 2 , Figure 3 and Figure 5This utility model provides an embodiment of a material supply and mixing device for 3D printing, comprising a shell 1, which serves as the basic frame of the entire device, providing installation space and structural support for the internal components; a power chamber 2 is provided inside the shell 1, specifically for accommodating and protecting power transmission-related components, isolating them from the mixing area; a motor 4 is fixedly connected inside the power chamber 2, providing driving force for the entire mixing and transmission process; a helical gear 5 is fixedly connected to the output end of the motor 4, which can rotate synchronously with the output end of the motor 4, undertaking the initial role of power transmission; a mixing chamber 3 is provided inside the shell 1, which is the core working area for mixing and stirring materials, directly contacting the printing material; a helical gear 6 is rotatably connected to the top wall of the power chamber 2, which can rotate on the top wall of the power chamber 2 to receive and transmit power; a helical gear 7 is rotatably connected to the bottom wall of the power chamber 2, which can rotate on the bottom wall of the power chamber 2, cooperating with other gears to achieve power diversion; the helical gear 5 meshes with the helical gear 6, and this meshing relationship The rotation of helical gear 5 directly drives the rotation of helical gear 6, achieving vertical power transmission. Helical gear 5 meshes with helical gear 7, allowing the power from helical gear 5 to simultaneously drive helical gear 7, forming a bidirectional power output. A rotating shaft 8 is fixedly connected to the outside of helical gear 6, and the rotating shaft 8 rotates synchronously with helical gear 6, transmitting power to the stirring area. Multiple stirring paddles 16 are fixedly connected to the outside of the rotating shaft 8. When the multiple stirring paddles 16 rotate with the rotating shaft 8, they can stir the contents of the stirring chamber 3. The materials are stirred and mixed to enhance their uniformity; a rotating shaft 9 is fixedly connected to the bottom of the helical gear 3 7, and the rotating shaft 9 rotates with the helical gear 3 7 to provide power to another set of stirring components; multiple stirring rods 10 are fixedly connected to the outside of the rotating shaft 2 9, and the multiple stirring rods 10 can stir the materials from different angles when they rotate, which, together with the stirring paddle 16, improves the mixing effect; two cutters 17 are fixedly connected to the bottom wall of the mixing chamber 3, and the two cutters 17 can cut the lumps of materials that may be formed during the stirring process to avoid large particles affecting the subsequent feeding.
[0018] Reference Figures 3-5 The stirring rod 10 is externally fixedly connected to multiple support columns 11, which provide mounting points for subsequent components. Inside each support column 11, abutment blocks 12 are slidably connected, allowing them to slide within the support column 11 to adapt to different working conditions. A base 14 is fixedly connected to one side of the abutment block 12, providing a mounting base for the scraper 15 and ensuring its stable fixation. A spring 13 is fixedly connected to the other side of the abutment block 12, providing continuous thrust through its elasticity to ensure close contact between related components. A scraper 15 is fixedly connected to the end of the base 14 away from the abutment block 12, allowing the scraper 15 to rotate with the stirring rod 10 and clean any residual material that may remain on the inner wall of the mixing chamber 3.
[0019] Reference Figures 1-3 The outer shell 1 is fitted with a heating wire 21. When the heating wire 21 is energized, it can generate heat to heat the materials in the mixing chamber 3 to meet the temperature requirements of the specific materials. The heating wire 21 is fixedly connected to an insulation shell 22, which can reduce the heat loss generated by the heating wire 21 and maintain the stability of the internal temperature of the device.
[0020] Reference Figures 1-3 The outer shell 1 has three legs 25 fixedly connected to its bottom, which together support the entire device and keep the bottom of the device at a distance from the placement surface. A support plate 26 is fixedly connected to the bottom of each leg 25, increasing the contact area between the leg 25 and the placement surface and improving the stability of the device during placement. A discharge pipe 18 is fixedly connected to the bottom of the outer shell 1, serving as the channel for outputting the uniformly mixed material to the 3D printing equipment. The discharge pipe 18 penetrates the outer shell 1, ensuring that the material can be smoothly discharged from the mixing chamber 3. A valve body 19 is fixedly connected to the outside of the discharge pipe 18, and a valve 20 is rotatably connected to the outside of the valve body 19. Rotating the valve 20 controls the opening and closing of the discharge pipe 18 and the amount of material output. A feeding port 23 is rotatably connected to the top of the outer shell 1, which can be opened and closed by rotation, facilitating the addition of printing material into the mixing chamber 3. A handle 24 is fixedly connected to the top of the feeding port 23, providing a force point for the operator to rotate the feeding port 23, making the opening and closing operation more convenient.
[0021] Reference Figures 3-5 The rotating shaft 8 is rotatably connected inside the rotating shaft 9. This nested rotating connection saves internal space of the device, while ensuring that the two rotating shafts can rotate independently without interfering with each other, so as to achieve the coordinated work of different stirring components.
[0022] Reference Figures 3-5 The scraper 15 is slidably connected to the inner wall of the mixing chamber 3 and abuts against the inner wall of the mixing chamber 3. The slidable connection ensures that the scraper 15 can rotate smoothly with the mixing rod 10, while the abutting state ensures that the scraper 15 can fit tightly against the chamber wall, effectively scraping off residual materials and preventing materials from accumulating and solidifying on the chamber wall.
[0023] Working principle: By rotating the handle 24 and adding the feeding port 23, printing material is added to the mixing chamber 3. Then, the motor 4 starts, and its output drives the helical gear 5 to rotate. Because the helical gear 5 meshes with the helical gear 6 on the top wall and the helical gear 7 on the bottom wall of the power chamber 2, the power is transmitted synchronously, causing the helical gears 6 and 7 to drive the rotating shafts 8 and 9 to rotate respectively. Multiple stirring paddles 16 outside the rotating shaft 8 rotate with it to mix the material in the mixing chamber 3 to enhance uniformity. Multiple stirring rods 10 outside the rotating shaft 9 rotate synchronously and cooperate with the stirring paddles 16 from different angles to improve the mixing effect. Simultaneously, multiple support pillars 11 outside the stirring rods 10 drive the base 14 and scraper 15 to rotate with the stirring rods 10. The scraper 15 can... Effective cleaning of residual materials on the bin walls prevents accumulation and solidification. The spring 13 inside the support column 11 gives the scraper 15 an adaptive function, reducing the possibility of damage to the scraper 15. The two cutters 17 on the bottom wall of the mixing bin 3 cut off any lumps that may form during mixing to prevent them from affecting subsequent material supply. If the material requires a specific temperature, the heating wire 21 on the outside of the outer shell 1 generates heat to heat the material inside the mixing bin 3. The outer insulation shell 22 reduces heat loss to maintain a stable temperature. The uniformly mixed material is output through the discharge pipe 18 at the bottom of the outer shell 1. The valve 20, which is rotated and connected to the outside of the valve body 19, controls the on / off state and the output amount. The entire device is supported by three legs 25 at the bottom of the outer shell 1 and a support plate 26 at the bottom of the legs 25 to ensure stable operation.
[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A material supply stirring device for 3D printing, comprising a housing (1), characterized in that: The outer shell (1) has a power chamber (2) inside, and a motor (4) is fixedly connected inside the power chamber (2). A helical gear (5) is fixedly connected to the output end of the motor (4). The outer shell (1) has a stirring chamber (3) inside. A helical gear (6) is rotatably connected to the top wall of the power chamber (2). A helical gear (7) is rotatably connected to the bottom wall of the power chamber (2). The helical gear (5) meshes with the helical gear (6). The helical gear (5) meshes with the helical gear (7). A rotating shaft (8) is fixedly connected to the outside of the helical gear (6). Multiple stirring paddles (16) are fixedly connected to the outside of the rotating shaft (8). A rotating shaft (9) is fixedly connected to the bottom of the helical gear (7). Multiple stirring rods (10) are fixedly connected to the outside of the rotating shaft (9). Two cutters (17) are fixedly connected to the bottom wall of the stirring chamber (3).
2. The material supply stirring device for 3D printing according to claim 1, characterized in that: The stirring rod (10) is externally fixedly connected to multiple support columns (11), and the support column (11) is internally slidably connected to a stop block (12). A base (14) is fixedly connected to one side of the stop block (12), and a spring (13) is fixedly connected to the other side of the stop block (12). A scraper (15) is fixedly connected to the end of the base (14) away from the stop block (12).
3. The material supply and stirring device for 3D printing according to claim 1, characterized in that: The outer shell (1) is fitted with a heating wire (21), and an insulation shell (22) is fixedly connected to the outside of the heating wire (21).
4. The material supply stirring device for 3D printing according to claim 1, characterized in that: The bottom of the outer shell (1) is fixedly connected to three legs (25), and the bottom of the legs (25) is fixedly connected to a support plate (26).
5. The material supply stirring device for 3D printing according to claim 1, characterized in that: The bottom of the outer shell (1) is fixedly connected to a discharge pipe (18), which passes through the outer shell (1). A valve body (19) is fixedly connected to the outside of the discharge pipe (18), and a valve (20) is rotatably connected to the outside of the valve body (19).
6. The material supply stirring device for 3D printing according to claim 1, characterized in that: The first rotating shaft (8) is rotatably connected inside the second rotating shaft (9).
7. The material supply stirring device for 3D printing according to claim 1, characterized in that: The top of the outer shell (1) is rotatably connected to a feeding port (23), and the top of the feeding port (23) is fixedly connected to a handle (24).
8. The material supply stirring device for 3D printing according to claim 2, characterized in that: The scraper (15) is slidably connected to the inner wall of the mixing chamber (3) and abuts against the inner wall of the mixing chamber (3).