Extrusion Rotary Platform 3D Printer

Abstract

This utility model belongs to the field of additive manufacturing technology, specifically relating to an extrusion-type rotary platform 3D printer, including a support assembly, a moving assembly, an extrusion assembly, and a rotating assembly. The support assembly includes a lower housing, an upper housing, and support columns, with multiple support columns installed above the lower housing. The upper housing is installed above the support columns and is fixedly connected to the lower housing via the support columns. The moving assembly includes a lead screw, a first motor, and a moving support plate. The lead screw is installed above the first motor and passes through and meshes with the moving support plate. The extrusion assembly includes an extruder body, a feed inlet, a heated extrusion device, and an extrusion nozzle. This utility model solves the problems of existing 3D printers requiring additional internal support structures, low stability, and frequent nozzle movement when printing tubular and rotating models in medical and industrial manufacturing fields.

Description

Technical Field

[0001] This utility model belongs to the field of additive manufacturing technology, specifically relating to an extrusion rotary platform 3D printer. Background Technology

[0002] Currently, 3D printing technology is continuously developing due to increasing demands in fields such as industrial manufacturing, biomedicine, and aerospace, leading to the emergence of various structural types of 3D printers, such as rotary arm 3D printers, desktop FDM-3D printers, and multi-nozzle 3D printers. This rapid development of 3D printing technology is also driving research institutions, enterprises, and universities to continuously invest in its research and development, striving for further breakthroughs in printing accuracy, efficiency, stability, and application areas.

[0003] When printing tubular and rotating structures, current 3D printing technology requires the addition of internal support structures to ensure stability during the printing process. However, these supports are difficult to remove after printing, and accuracy is hard to guarantee. The steps required to add and remove internal support structures increase printing time, leading to reduced printing efficiency. Existing 3D printers mainly rely on a fixed platform and XYZ axis movement for printing. The Y-axis is generally a mechanism for independent platform movement, which increases the platform's inertia and limits its forward and backward movement speed, making high-efficiency printing impossible. Over time, this can cause a decrease in overall machine rigidity, resulting in reduced printing accuracy. Traditional XYZ fixed-platform 3D printers have limitations in terms of overall machine rigidity, space utilization, printing speed, and material selection, making them unsuitable for printing precision parts. Traditional single-nozzle 3D printers require reciprocating motion to build up material layer by layer during printing, and also require internal support structures to ensure the stability of the printed part. When printing large and complex models, frequent nozzle movements are required, which greatly reduces printing efficiency. Furthermore, single-nozzle printers can only print with one material at a time, and cannot print multiple materials simultaneously, limiting printing speed and flexibility.

[0004] Therefore, those skilled in the art are dedicated to developing extrusion-type rotary platform 3D printers that avoid the problems of needing to add additional internal support structures, low stability, and frequent nozzle movement when printing tubular and rotating models in the medical and industrial manufacturing fields. Summary of the Invention

[0005] To address the aforementioned shortcomings in existing technologies, this invention provides an extrusion-type rotary platform 3D printer, which solves the problems of existing 3D printers requiring additional internal support structures, low stability, and frequent nozzle movement when printing tubular and rotating models in the medical and industrial manufacturing fields.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an extrusion-type rotary platform 3D printer, including a support assembly, a moving assembly, an extrusion assembly, and a rotating assembly; the support assembly includes a lower shell, an upper shell, and support columns, with multiple support columns installed above the lower shell, and the upper shell installed above the support columns, the upper shell being fixedly connected to the lower shell through the support columns; the moving assembly includes a lead screw, a first motor, and a moving support plate, the lead screw being installed above the first motor, the lead screw passing through the moving support plate and meshing with the moving support plate; the extrusion assembly includes an extruder body, a feed inlet, a heated extrusion device, and an extrusion port, the feed inlet being installed at the top of the extruder body, the heated extrusion device being installed below the extruder body, and an extrusion port being provided below the heated extrusion device; the rotating assembly includes a rotating disk, a rotating disk mounting shaft, and a driven large gear, the rotating disk being installed above the rotating disk mounting shaft, and a driven large gear being provided on the outer side of the rotating disk mounting shaft.

[0007] The beneficial effects of adopting the above scheme are as follows: the support component provides installation positions for other components, plays a supporting role in the overall structure, and is also the foundation for connecting other components; the lower and upper shells can protect the internal circuitry and prevent the overall function from being damaged by external impacts to precision components; the support column can connect the lower and upper shells, making them a whole; the moving component can control the movement position of the extrusion component; the first motor can drive the lead screw to rotate, and the lead screw meshes with the moving support plate. When the lead screw rotates, the moving support plate will move up and down, precisely controlling the height of the extrusion component, so that the extrusion component can accurately carry out layer-by-layer printing. After each layer is printed, the extrusion component will move up or down. The extrusion assembly moves to complete the next layer of printing, ensuring that it maintains a precise relative position throughout the printing process, while also guaranteeing printing accuracy and the stability of the material extrusion effect. The extrusion assembly can stably execute the feeding program, and the extruder body can transport the printing substrate. The printing substrate enters the extruder body through the feed port, and then is heated by the heating extrusion device, allowing it to be smoothly extruded from the extrusion port below the extruder body. The rotating assembly, through the rotation of the rotary disk, can reduce the moving distance and frequency of the extrusion assembly during the printing of tubular and rotating models, ensuring printing stability and efficiency. The rotary disk mounting shaft ensures that the rotary disk can rotate smoothly.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, a control panel is provided at the front of the lower housing, a charging port is provided at the rear of the lower housing, and a power switch is provided to the left of the charging port.

[0010] The beneficial effects of adopting the above-mentioned further solutions are: the control panel can quickly control other components through electrical connection, the user provides a charging port to power the printer as a whole, the power switch can provide protection for the printer, and the power can be cut off in time in case of emergency.

[0011] Furthermore, the support column is provided with a support guide groove, and the movable support plate is provided with multiple support plate limiting protrusions. The support plate limiting protrusions are installed in the support guide groove. The movable support plate is slidably connected to the support column. A guide sleeve is provided below the movable support plate. A movable guide column is provided inside the guide sleeve. The movable guide column is slidably connected to the guide sleeve. Both ends of the movable guide column are fixedly connected to the lower housing and the upper housing, respectively. An X-belt snap-fit ​​is provided at the rear of the extruder body.

[0012] The beneficial effects of adopting the above-mentioned further solution are: the support guide groove and the support plate limiting protrusion slide together, so that the movable support plate can be locked inside the support column. The movable support plate is slidably connected to the movable guide column through the guide sleeve. The support plate limiting protrusion and the movable guide column can simultaneously limit the movable support plate, so that it can always move along the Z-axis direction without regional tilting, further ensuring the stability of the extrusion component during the printing process, and allowing the extrusion component to move smoothly on the Z-axis.

[0013] Furthermore, a second rotating shaft limiting member is provided below the movable support plate, and a second rotating shaft is provided inside the second rotating shaft limiting member. The second rotating shaft is rotatably connected to the second rotating shaft limiting member. A second motor is provided at one end of the second rotating shaft limiting member, and a Y-direction belt is provided on the second rotating shaft limiting member. A Y-direction moving rail is provided below the Y-direction belt, and both ends of the Y-direction moving rail are fixed to support columns. A Y-direction slider is provided on the Y-direction moving rail, and the Y-direction slider is slidably connected to the Y-direction moving rail. A third motor support frame is provided on the Y-direction slider, and a Y-belt locking member is provided at the top of the third motor support frame. The component is installed on the Y-axis belt, and the Y-axis belt clamp is fixedly connected to the Y-axis belt. A third motor is provided at the bottom of the third motor support frame on the left side. A third rotating shaft is provided inside the third motor support frame and is connected to the third motor. An X-axis belt is provided on the third rotating shaft. An X-axis moving rail is provided between the mirror-mounted third motor support frames on the left and right sides. The X-axis moving rail is located directly above the X-axis belt. An X-axis slider is provided on the X-axis moving rail and is slidably connected to the X-axis moving rail. The X-axis belt clamp is installed on the X-axis belt and is fixedly connected to the X-axis belt.

[0014] The beneficial effects of adopting the above-mentioned further solution are as follows: the second rotating shaft can drive the Y-axis belt to rotate under the drive of the second motor, and the third motor support frame is installed on the Y-axis belt through the Y-axis belt clamp. When the Y-axis belt rotates, the third motor support frame will move along the Y-axis moving rail, realizing the Y-axis movement of the extrusion assembly. The third motor support frame provides the installation position for the third motor. The third rotating shaft can drive the X-axis belt to rotate under the drive of the third motor. The extrusion assembly is installed on the X-axis belt through the X-axis belt clamp. When the X-axis belt rotates, the extrusion assembly will move along the X-axis moving rail, realizing the X-axis movement of the extrusion assembly. The second motor and the third motor cooperate with each other to ensure the smoothness of the linear motion of the extrusion assembly in the X-axis and Y-axis and the high precision of repeatability positioning.

[0015] Furthermore, the moving component also includes a lead screw fixing device, the lead screw is fixed to the inner side of the upper housing by the lead screw fixing device, the lead screw is rotatably connected to the upper housing, and the first motor is installed on the inner side of the lower housing.

[0016] The beneficial effects of adopting the above-mentioned further solution are: through the lead screw fixing device, the lead screw is rotatably connected to the upper housing, and the lead screw is made of high-strength stainless steel, which has high strength and is also rust-proof.

[0017] Furthermore, a bottom support plate is provided above the lower housing, the rotating disk mounting shaft is installed above the center of the bottom support plate, multiple driving pinions are provided on the outside of the driven large gear, the driving pinions mesh with the driven large gear, a small wheel mounting shaft is provided on the inside of the driving pinion, a fourth motor mounting bracket is provided below the lower housing, a fourth motor is provided on the fourth motor mounting bracket, and the fourth motor is fixedly connected to the small wheel mounting shaft.

[0018] The beneficial effects of adopting the above-mentioned further solution are as follows: multiple active pinions, driven by multiple fourth motors, run along a specific trajectory at the same speed. The active pinions mesh with the driven large gear, which enables the driven large gear to rotate at an angle under the drive of the active pinions. To ensure the accuracy of the rotating platform, this design uses a high-precision gear system, which makes the rotation of the rotating disk smooth and accurate, thereby further improving the stability and accuracy of the overall printing process.

[0019] Furthermore, an avoidance groove is provided on the inner side of the lower housing.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the avoidance groove reserves movement space for the third motor. When the extrusion component descends to a lower height, the third motor will also descend to a lower height. The avoidance groove can prevent the third motor from colliding with the bottom support plate.

[0021] Furthermore, a cooling device is provided on the side of the extruder body, and a cold air outlet is provided below the cooling device, with the cold air outlet aligned with the extrusion port.

[0022] The beneficial effects of adopting the above-mentioned further solution are: the cooling device can simultaneously cool the extruder body and the printing substrate, and the cold air outlet is aligned with the extrusion port. Therefore, the printing substrate extruded from the extrusion port in the molten state can be cooled and solidified by the cold air blown out of the cold air outlet by the cooling device, which further improves the stability of the printed parts during the printing process. It eliminates the need to add an extra internal support structure when printing tubular and rotating models, and the integrity of the printed product is also guaranteed.

[0023] Furthermore, the extruder body is provided with ventilation holes.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the heat emitted by the extruder body is dissipated through the vent holes, thus ensuring a safe working environment for the extruder body.

[0025] Compared with the prior art, this utility model has the following advantages:

[0026] The extrusion rotary platform 3D printer is a new type of additive manufacturing equipment based on fused deposition modeling technology. The innovation of this design lies in the use of a rotary platform design, which achieves continuous molding by means of a rotating worktable. This improves the limitations of the reciprocating motion of traditional Cartesian coordinate system 3D printers. It also changes the situation of traditional fixed platform 3D printers, which are prone to collapse, have low precision and low efficiency when printing tubes and rotating parts, and require the addition of internal support.

[0027] By coordinating the movement of the moving and rotating components, the printing path exhibits continuous rotation characteristics, making it particularly suitable for high-speed prototyping of axisymmetric models. It also boasts high motion continuity, as the unidirectional uniform rotation of the rotating platform replaces the reciprocating motion of the traditional XY plane, reducing idle running time.

[0028] By optimizing the symmetry of the 3D printer structure and utilizing the inertia of rotation to achieve uniform material accumulation, stress concentration between layers is avoided, the mechanical properties of cylindrical parts are improved, the support structure is simplified, and rotating parts can be formed without internal support, saving material consumption and reducing the complexity of post-processing. Through multiple experiments, it has been proven that the extrusion-type rotary platform 3D printer of this invention improves the printing efficiency by an average of 23.18% compared with traditional 3D printers when printing tubular and rotating models, and the model integrity reaches 100%. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of an embodiment of the extrusion rotary platform 3D printer mentioned in this utility model (viewpoint 1).

[0030] Figure 2 This is a three-dimensional structural diagram of an embodiment of the extrusion rotary platform 3D printer mentioned in this utility model (viewpoint 2).

[0031] Figure 3 This is a three-dimensional structural diagram of an embodiment of the extrusion rotary platform 3D printer mentioned in this utility model (viewpoint 3).

[0032] Figure 4 This is a side view of the extrusion rotary platform 3D printer embodiment mentioned in this utility model, excluding some of the support components;

[0033] Figure 5 This is a front view of an embodiment of the extrusion rotary platform 3D printer mentioned in this utility model;

[0034] Figure 6 for Figure 5 Sectional view of AA;

[0035] Figure 7 This is a three-dimensional structural diagram of the extrusion component in an embodiment of the extrusion-type rotary platform 3D printer mentioned in this utility model.

[0036] The reference numerals in the accompanying drawings include:

[0037] Support assembly 1, lower housing 101, charging port 102, power switch 103, upper housing 104, support column 105, support guide groove 1051, control panel 106, bottom support plate 107, avoidance groove 108, moving assembly 2, lead screw 201, lead screw fixing device 2011, first motor 202, moving support plate 203, support plate limiting protrusion 2031, moving guide column 204, guide sleeve 205, second rotating shaft limiting component 206, second motor 207, second rotating shaft 208, Y-direction belt 209, Y-direction moving rail 210, Y-direction slider 211, third motor Support frame 212, Y-belt snap-fit ​​connector 2121, third motor 213, third rotating shaft 214, X-direction belt 215, X-direction moving rail 216, X-direction slider 217, extrusion assembly 3, extruder body 301, X-belt snap-fit ​​connector 3011, vent 3012, feed inlet 302, heated extrusion device 303, extrusion outlet 304, cooling device 305, cold air outlet 306, rotating assembly 4, rotating disk 401, rotating disk mounting shaft 402, driven large gear 403, driving small gear 404, small gear mounting shaft 405, fourth motor 406, fourth motor mounting bracket 407. Detailed Implementation

[0038] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0040] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] Example:

[0043] like Figures 1-7 As shown, the extrusion rotary platform 3D printer includes a support assembly 1, a moving assembly 2, an extrusion assembly 3, and a rotating assembly 4;

[0044] Support assembly 1 includes a lower housing 101, an upper housing 104, and support columns 105. Multiple support columns 105 are installed above the lower housing 101, and the upper housing 104 is installed above the support columns 105. The upper housing 104 is fixedly connected to the lower housing 101 through the support columns 105.

[0045] The moving component 2 includes a lead screw 201, a first motor 202, and a moving support plate 203. The lead screw 201 is mounted above the first motor 202 and passes through the moving support plate 203 and engages with the moving support plate 203.

[0046] The extrusion assembly 3 includes an extruder body 301, a feed inlet 302, a heated extrusion device 303, and an extrusion port 304. The feed inlet 302 is installed on the top of the extruder body 301, the heated extrusion device 303 is installed below the extruder body 301, and the extrusion port 304 is provided below the heated extrusion device 303.

[0047] The rotating assembly 4 includes a rotating disk 401, a rotating disk mounting shaft 402, and a driven gear 403. The rotating disk 401 is mounted above the rotating disk mounting shaft 402, and the driven gear 403 is provided on the outer side of the rotating disk mounting shaft 402.

[0048] In this invention, the moving component 2 can control the extrusion component 3 to move in the X, Y, and Z axis directions, while the rotating component 4 can control the printed part to rotate in a circle. This makes printing tubular and rotating models simpler and faster, avoids unnecessary movement, improves the flexibility, speed and accuracy of printing, and avoids the problems of print body collapse and shrinkage that occur when printing tubular and rotating models in the medical and industrial manufacturing fields.

[0049] Support component 1 provides mounting positions for other components, providing support for the overall structure and serving as the foundation for connecting other components. The lower housing 101 and upper housing 104 protect the internal wiring, preventing damage to the overall function caused by external impacts to delicate components such as circuits. Support column 105 connects the lower housing 101 and upper housing 104, making them a unified whole. Moving component 2 controls the movement of extrusion component 3. The first motor 202 drives the lead screw 201 to rotate, which meshes with the moving support plate 203. When the lead screw 201 rotates, the moving support plate 203 moves up and down, precisely controlling the height of extrusion component 3. This allows extrusion component 3 to accurately perform layer-by-layer printing. After each layer is printed, extrusion component 3 moves up or down to complete the next layer's printing operation. This ensures that extrusion component 3 maintains an accurate relative position throughout the printing process, guaranteeing printing accuracy and the stability of the material extrusion effect. The moving support plate 203 is made of 316 stainless steel, providing wear resistance and corrosion resistance. The first motor 202 is model 20HM20-1004S. This model of motor has many advantages, such as stable output power, high torque, and low operating noise, which can meet the working requirements of the moving support plate 203 under different working conditions. Based on today's working conditions and through calculations, the lead screw 201 is model SFK1002. This model of lead screw has the characteristics of high precision, high rigidity, and low friction coefficient, which can effectively improve the transmission accuracy and operational stability of the moving support plate 203. The extrusion assembly 3 can stably execute the feeding program. The extruder body 301 can transport the printing substrate. The printing substrate enters the extruder body 301 through the feed port 302, and then the printing substrate is heated by the heating extrusion device 303, so that the printing substrate can be smoothly extruded from the extrusion port 304 below the extruder body 301. The rotating component 4, through the rotation of the rotating disk 401, can reduce the moving distance and frequency of the extrusion component 3 during the printing of tubular and rotating body models, ensuring printing stability and printing efficiency. The rotating disk mounting shaft 402 can ensure that the rotating disk 401 can rotate smoothly.

[0050] Multiple experiments have demonstrated that the extrusion-type rotary platform 3D printer of this invention improves the printing efficiency by an average of 23.18% compared to traditional 3D printers when printing tubular and rotating models, and achieves 100% model integrity.

[0051] A control panel 106 is located at the front of the lower housing 101, and a charging port 102 is located at the rear of the lower housing 101. A power switch 103 is located to the left of the charging port 102.

[0052] Specifically, the control panel 106 enables quick control of other components via electrical connection, the user provides a charging port 102 to power the printer, and the power switch 103 provides a safety feature for the printer, allowing for timely power cut-off in case of emergency.

[0053] The support column 105 is provided with a support guide groove 1051, and the movable support plate 203 is provided with multiple support plate limiting protrusions 2031. The support plate limiting protrusions 2031 are installed in the support guide groove 1051. The movable support plate 203 is slidably connected to the support column 105. A guide sleeve 205 is provided below the movable support plate 203. A movable guide column 204 is provided inside the guide sleeve 205. The movable guide column 204 is slidably connected to the guide sleeve 205. The two ends of the movable guide column 204 are fixedly connected to the lower housing 101 and the upper housing 104, respectively. An X-belt snap fastener 3011 is provided at the rear of the extruder body 301.

[0054] Specifically, the support guide groove 1051 and the support plate limiting protrusion 2031 slide together, so that the movable support plate 203 can be locked inside the support column 105. The movable support plate 203 is slidably connected to the movable guide column 204 through the guide sleeve 205. The support plate limiting protrusion 2031 and the movable guide column 204 can simultaneously limit the movable support plate 203, so that it can always move along the Z-axis direction without regional tilting, further ensuring the stability of the extrusion component 3 during the printing process, and allowing the extrusion component 3 to move smoothly on the Z-axis.

[0055] A second pivot limiting member 206 is provided below the movable support plate 203. A second pivot 208 is provided inside the second pivot limiting member 206. The second pivot 208 is rotatably connected to the second pivot limiting member 206. A second motor 207 is provided at one end of the second pivot limiting member 206. A Y-direction belt 209 is provided on the second pivot limiting member 206. A Y-direction moving rail 210 is provided below the Y-direction belt 209. Both ends of the Y-direction moving rail 210 are fixed to the support column 105. A Y-direction slider 211 is provided on the Y-direction moving rail 210. The Y-direction slider 211 is slidably connected to the Y-direction moving rail 210. A third motor support frame 212 is provided on the Y-direction slider 211. A Y-belt snap-fit ​​member 2121 is provided on the top of the third motor support frame 212. The Y-belt snap-fit ​​member 2121 is installed on... On the Y-belt 209, the Y-belt clip 2121 is fixedly connected to the Y-belt 209. The bottom of the left third motor support frame 212 is equipped with a third motor 213. The inner side of the third motor support frame 212 is equipped with a third rotating shaft 214, which is connected to the third motor 213. The third rotating shaft 214 is equipped with an X-belt 215. The left and right mirror-mounted third motor support frames 212 are equipped with an X-axis moving rail 216, which is located directly above the X-belt 215. The X-axis moving rail 216 is equipped with an X-axis slider 217, which is slidably connected to the X-axis moving rail 216. The X-belt clip 3011 is installed on the X-belt 215 and is fixedly connected to the X-belt 215.

[0056] Specifically, the second rotating shaft 208, driven by the second motor 207, can drive the Y-axis belt 209 to rotate. The third motor support frame 212 is mounted on the Y-axis belt 209 via the Y-axis belt clip 2121. When the Y-axis belt 209 rotates, the third motor support frame 212 moves along the Y-axis moving rail 210, realizing the Y-axis movement of the extrusion assembly 3. The third motor support frame 212 provides a mounting position for the third motor 213. The third rotating shaft 214, driven by the third motor 213, can drive the X-axis belt 215 to rotate. The extrusion assembly 3 is mounted on the X-axis belt 215 via the X-axis belt clip 3011. When the X-axis belt 215 rotates, the extrusion assembly 3 moves along the X-axis moving rail 216. The movement of the extrusion assembly 3 along the X-axis is achieved by the second motor 207 and the third motor 213 working together to ensure the smoothness of the linear motion of the extrusion assembly 3 along the X and Y axes and the high precision of repeatability positioning. The second motor 207 and the third motor 213 are both SGM7G-75EA6C models. Through calculations including power determination, V-belt selection, pulley diameter and belt speed calculation, reference length and center distance determination, wrap angle verification, and torque verification, it can be proven that the SGM7G-75EA6C motor can meet all constraints. Furthermore, the overall structure of the moving assembly 2 is simple, the operation is stable, and the noise is low, effectively improving the printing speed and dynamic response performance, and providing a reliable guarantee for high-quality printing.

[0057] The moving component 2 also includes a lead screw fixing device 2011, which fixes the lead screw 201 to the inside of the upper housing 104. The lead screw 201 is rotatably connected to the upper housing 104, and the first motor 202 is installed inside the lower housing 101.

[0058] Specifically, the lead screw 201 is rotatably connected to the upper housing 104 via the lead screw fixing device 2011. The lead screw 201 is made of 304L stainless steel, specifically model SFK1002, which has high strength and is also rust-proof.

[0059] A bottom support plate 107 is provided above the lower housing 101. A rotating disk mounting shaft 402 is installed above the center of the bottom support plate 107. Multiple driving pinions 404 are provided on the outside of the driven large gear 403. The driving pinions 404 mesh with the driven large gear 403. A small wheel mounting shaft 405 is provided on the inside of the driving pinion 404. A fourth motor mounting bracket 407 is provided below the lower housing 101. A fourth motor 406 is provided on the fourth motor mounting bracket 407. The fourth motor 406 is fixedly connected to the small wheel mounting shaft 405.

[0060] Specifically, multiple driving pinions 404, driven by multiple fourth motors 406, run along a specific trajectory at the same speed. The driving pinions 404 mesh with the driven large gear 403, which in turn drives the rotating disk 401 above the driven large gear 403 to rotate at an angle. To ensure the accuracy of the rotating platform, this design uses a high-precision gear system, which makes the rotation of the rotating disk 401 smooth and accurate, thereby further improving the stability and accuracy of the overall printing process. After experimental calculations, the fourth motor 406 is selected as a heavy-duty worm gear micro DC geared motor. After checking the moment of inertia and torque, it is confirmed that it meets the stability and accuracy requirements of the rotating platform. The driven large gear 403 and the driving pinion 404 are made of 40Cr and 45 steel respectively to ensure strength and durability. The rationality of the design is verified by calculating the transmission ratio, tooth profile parameters and bending strength.

[0061] The lower housing 101 has an avoidance groove 108 on its inner side.

[0062] Specifically, the avoidance groove 108 provides movement space for the third motor 213. When the extrusion assembly 3 descends to a lower height, the third motor 213 will also descend to an even lower height. The avoidance groove 108 can prevent the third motor 213 from colliding with the bottom support plate 107.

[0063] A cooling device 305 is provided on the side of the extruder body 301, and a cold air outlet 306 is provided below the cooling device 305, which is aligned with the extrusion port 304.

[0064] Specifically, the cooling device 305 can simultaneously cool the extruder body 301 and the printing substrate. The cold air outlet 306 is aligned with the extrusion port 304. Therefore, the printing substrate extruded from the extrusion port 304 in the molten state can be cooled and solidified by the cold air blown out of the cold air outlet 306 by the cooling device 305, which further improves the stability of the printed parts during the printing process. This eliminates the need to add an extra internal support structure when printing tubular and rotating models, and also ensures the integrity of the printed product.

[0065] The extruder body 301 is provided with a vent hole 3012.

[0066] Specifically, the heat emitted by the extruder body 301 is dissipated through the vent 3012, ensuring a safe working environment for the extruder body 301.

[0067] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. An extrusion-based rotary platform 3D printer characterized by: Includes a support component (1), a moving component (2), an extrusion component (3), and a rotating component (4); The support assembly (1) includes a lower housing (101), an upper housing (104), and support columns (105). Multiple support columns (105) are installed above the lower housing (101), and the upper housing (104) is installed above the support columns (105). The upper housing (104) is fixedly connected to the lower housing (101) through the support columns (105). The moving component (2) includes a lead screw (201), a first motor (202), and a moving support plate (203). The lead screw (201) is mounted above the first motor (202), and the lead screw (201) passes through the moving support plate (203) and engages with the moving support plate (203). The extrusion assembly (3) includes an extruder body (301), a feed inlet (302), a heated extrusion device (303), and an extrusion port (304). The feed inlet (302) is installed on the top of the extruder body (301), the heated extrusion device (303) is installed below the extruder body (301), and the extrusion port (304) is provided below the heated extrusion device (303). The rotating assembly (4) includes a rotating disk (401), a rotating disk mounting shaft (402), and a driven gear (403). The rotating disk (401) is mounted above the rotating disk mounting shaft (402), and the driven gear (403) is provided on the outer side of the rotating disk mounting shaft (402).

2. The extrusion-based rotary platform 3D printer of claim 1, wherein: The lower housing (101) has a control panel (106) at the front and a charging port (102) at the rear. A power switch (103) is located on the left side of the charging port (102).

3. The extrusion-based rotary platform 3D printer of claim 1, wherein: The support column (105) is provided with a support guide groove (1051), and the movable support plate (203) is provided with a plurality of support plate limiting protrusions (2031). The support plate limiting protrusions (2031) are installed in the support guide groove (1051). The movable support plate (203) is slidably connected to the support column (105). A guide sleeve (205) is provided below the movable support plate (203). A movable guide column (204) is provided inside the guide sleeve (205). The movable guide column (204) is slidably connected to the guide sleeve (205). The two ends of the movable guide column (204) are fixedly connected to the lower housing (101) and the upper housing (104) respectively. An X-belt snap fastener (3011) is provided at the rear of the extruder body (301).

4. The extrusion-type rotary platform 3D printer as described in claim 3, characterized in that: A second rotating shaft limiting member (206) is provided below the movable support plate (203). A second rotating shaft (208) is provided inside the second rotating shaft limiting member (206). The second rotating shaft (208) is rotatably connected to the second rotating shaft limiting member (206). A second motor (207) is provided at one end of the second rotating shaft limiting member (206). A Y-direction belt (209) is provided on the second rotating shaft limiting member (206). A Y-direction moving belt (209) is provided below the Y-direction belt (209). A moving rail (210) is provided, with both ends of the Y-axis moving rail (210) fixed on the support column (105). A Y-axis slider (211) is provided on the Y-axis moving rail (210), and the Y-axis slider (211) is slidably connected to the Y-axis moving rail (210). A third motor support frame (212) is provided on the Y-axis slider (211), and a Y-belt snap-fit ​​connector (2121) is provided on the top of the third motor support frame (212). The Y-belt snap-fit ​​connector (2121) is installed... On the Y-belt (209), the Y-belt clip (2121) is fixedly connected to the Y-belt (209). A third motor (213) is provided at the bottom of the third motor support frame (212) on the left side. A third rotating shaft (214) is provided inside the third motor support frame (212). The third rotating shaft (214) is connected to the third motor (213). An X-belt (215) is provided on the third rotating shaft (214). The third motors on the left and right sides are mirror-mounted. An X-axis moving rail (216) is provided between the motor support frame (212). The X-axis moving rail (216) is located directly above the X-axis belt (215). An X-axis slider (217) is provided on the X-axis moving rail (216). The X-axis slider (217) is slidably connected to the X-axis moving rail (216). The X-axis belt clip (3011) is installed on the X-axis belt (215) and is fixedly connected to the X-axis belt (215).

5. The extrusion-based rotary platform 3D printer of claim 1, wherein: The moving component (2) also includes a lead screw fixing device (2011), the lead screw (201) is fixed to the inside of the upper housing (104) by the lead screw fixing device (2011), the lead screw (201) is rotatably connected to the upper housing (104), and the first motor (202) is installed inside the lower housing (101).

6. The extrusion-type rotary platform 3D printer as described in claim 1, characterized in that: A bottom support plate (107) is provided above the lower housing (101). The rotating disk mounting shaft (402) is installed at the center above the bottom support plate (107). Multiple driving pinions (404) are provided on the outside of the driven large gear (403). The driving pinions (404) mesh with the driven large gear (403). A small wheel mounting shaft (405) is provided on the inside of the driving pinion (404). A fourth motor mounting bracket (407) is provided below the lower housing (101). A fourth motor (406) is provided on the fourth motor mounting bracket (407). The fourth motor (406) is fixedly connected to the small wheel mounting shaft (405).

7. The extrusion rotary platform 3D printer as described in claim 6, characterized in that: The lower housing (101) has an avoidance groove (108) on its inner side.

8. The extrusion-type rotary platform 3D printer as described in claim 1, characterized in that: The extruder body (301) is provided with a cooling device (305) on its side, and a cold air outlet (306) is provided below the cooling device (305), which is aligned with the extrusion port (304).

9. The extrusion rotary platform 3D printer as described in claim 8, characterized in that: The extruder body (301) is provided with a vent hole (3012).

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