A 3D printer

Abstract

The application discloses a 3D printer, which comprises a heating box body, a working cavity is arranged in the heating box body, a rotary table heat shield is arranged in the working cavity, a heat insulation cavity is arranged in the rotary table heat shield, a rotary table driving assembly is arranged in the heat insulation cavity, a rotating platform is arranged on the rotary table heat shield, the rotating platform is in transmission connection with the rotary table driving assembly, a nozzle assembly is arranged at the top of the working cavity, the nozzle assembly is connected with the top of the heating box body through a three-axis movable seat, a parallel driving mechanism in transmission connection with the three-axis movable seat is arranged outside the heating box body, and a heating mechanism in communication with the working cavity is arranged on the heating box body; the rotary table driving assembly is used for driving the rotating platform to make three-axis movement; the design of the rotary table heat shield and the heat insulation cavity effectively insulates the heat transfer, and good protection is realized on the rotary table driving assembly, so that the influence of high temperature is avoided; the three-axis movable seat and the parallel driving mechanism are both arranged outside the working cavity, so that the influence of the heat source is avoided, and the service life of the equipment is effectively prolonged.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and in particular to a 3D printer. Background Technology

[0002] During 3D printing, the filament is prone to shrinkage and deformation during the cooling phase. Therefore, precise temperature control of the forming space is crucial to ensure print quality. Five-axis printers typically have a nozzle located at the top of the machine housing, driven by a nozzle drive mechanism that moves the nozzle along three axes. However, when the nozzle and its drive mechanism operate in a heated environment, the high temperature can degrade the performance of lubrication and sensing components in the nozzle drive mechanism and other moving parts, affecting the overall stability of the equipment and print quality.

[0003] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a 3D printer that can separate the material heating area and the motion device area of ​​the 3D printer to avoid the motion device from being heated and reducing reliability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A 3D printer includes a heating chamber, a working chamber within the heating chamber, a turntable heat shield within the working chamber, a heat insulation chamber within the turntable heat shield, a turntable drive assembly within the heat insulation chamber, a rotating platform on the turntable heat shield, the rotating platform being drivenly connected to the turntable drive assembly, a nozzle assembly at the top of the working chamber, the nozzle assembly being connected to the top of the heating chamber via a three-axis movable seat, a parallel drive mechanism outside the heating chamber being drivenly connected to the three-axis movable seat, and a heating mechanism communicating with the working chamber on the heating chamber; the turntable drive assembly drives the rotating platform to perform three-axis motion.

[0007] In the 3D printer described above, the three-axis movable base includes a first movable platform and a second movable platform. The first movable platform is located inside the working chamber, and the second movable platform is located outside the heating chamber. The first movable platform and the second movable platform are connected by at least three ball-and-slider mechanisms. The ball-and-slider mechanisms are disposed on the heating chamber, and their two ends are respectively ball-and-slider connected to the first movable platform and the second movable platform. The nozzle assembly includes a nozzle section and a filament extrusion section. The filament extrusion section communicates with the nozzle section. The nozzle section is disposed on the first movable platform, and the filament extrusion section and the parallel drive mechanism are respectively disposed on the second movable platform.

[0008] In the 3D printer, the ball joint slider mechanism includes a ball joint base and a slide rod. The ball joint base is disposed on the heating chamber. A rotating groove is provided inside the ball joint base. A rotatable ball rotor is disposed inside the rotating groove. A through hole is provided on the ball rotor. The slide rod is slidably connected to the through hole. The two ends of the slide rod are respectively connected to the first movable platform and the second movable platform through a ball joint assembly.

[0009] In the 3D printer described above, the turntable heat shield includes a bellows box, the heat insulation cavity is located inside the bellows box, a sealing plate assembly is provided on the top of the bellows box, the rotating platform is disposed on the sealing plate assembly, and the turntable drive assembly is connected to the sealing plate assembly and the rotating platform respectively.

[0010] In the 3D printer, a cooling mechanism is provided on the heating chamber. The cooling mechanism is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively connected to the heat insulation cavity.

[0011] In the 3D printer, the cooling mechanism includes a base, an air inlet assembly, and an air outlet assembly. The base is disposed at the bottom of the heat insulation cavity. The air inlet assembly and the air outlet assembly are respectively disposed on the heating chamber. An air inlet slot and an air outlet slot are respectively disposed on both sides of the base. The air inlet assembly is connected to the air inlet slot, and the air outlet assembly is connected to the air outlet slot.

[0012] In the 3D printer described above, the air inlet duct assembly includes an air inlet pipe; the air outlet assembly includes an air outlet pipe; a groove is provided at the bottom of the heating chamber, at least a portion of the air inlet pipe and the air outlet pipe are located in the groove, one end of the air inlet pipe is connected to the air inlet slot, one end of the air outlet pipe is connected to the air outlet slot, and a fan assembly is respectively provided in the air inlet pipe and the air outlet pipe.

[0013] In the 3D printer described above, the turntable drive assembly includes a first rotary joint assembly. The first rotary joint assembly has a vertical rotating groove, and a second rotary joint assembly is disposed within the vertical rotating groove and is drively connected to the first rotary joint assembly. The output end of the second rotary joint assembly extends toward the sealing plate assembly, passes through the sealing plate assembly, and connects to the rotating platform. The first rotary joint assembly is used to drive the rotating platform to rotate in the vertical direction, and the second rotary joint assembly is used to drive the rotating platform to rotate in the horizontal direction.

[0014] In the 3D printer, the sealing plate assembly includes a sealing plate, which is connected to the top opening of the bellows box through a first sealing frame. The rotating platform is disposed on the sealing plate, and the turntable drive assembly is connected to the sealing plate and the rotating platform respectively. The bottom opening of the bellows box is connected to the bottom of the working chamber through a second sealing frame.

[0015] In the 3D printer described above, a door opening communicating with the working chamber is provided on one side of the heating chamber, and a door body is provided outside the door opening, with an observation window provided on the door body; the door body is used to open or close the door opening.

[0016] Beneficial effects:

[0017] This invention provides a 3D printer where the heating chamber and working cavity ensure temperature control throughout the 3D printing process. This is crucial for 3D printing technologies such as fused deposition modeling, ensuring the material maintains a suitable molten state during printing, thereby improving print quality. Secondly, the design of the turntable heat shield and heat insulation cavity effectively isolates heat transfer, providing excellent protection for the turntable drive components, avoiding the effects of high temperatures, extending the equipment's lifespan, and ensuring the stability of the printing process. Furthermore, the turntable heat shield has the advantage of compressing the heating space volume, significantly saving energy consumption for heating by reducing the required heating space. Simultaneously, a smaller heating space means a shorter time for the cavity temperature to reach the required printing temperature, thus reducing waiting time and improving printing efficiency. The coordinated work of the turntable drive components and the rotating platform enables precise three-axis movement of the printing platform, enhancing printing flexibility and making it possible to print complex, high-precision 3D models. The design of the three-axis movable seat allows the nozzle to move freely in three-dimensional space, further improving printing flexibility and accuracy. The three-axis movable seat and parallel drive mechanism are both located outside the working chamber, avoiding the influence of heat sources and thus effectively extending the service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the 3D printer provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the 3D printer provided by the present invention;

[0020] Figure 3 A schematic diagram of the disassembly structure of the turntable heat shield in the 3D printer provided by the present invention. Figure 1 ;

[0021] Figure 4A schematic diagram of the disassembly structure of the turntable heat shield in the 3D printer provided by the present invention. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the assembly structure of the three-axis movable seat and the parallel drive mechanism in the 3D printer provided by the present invention;

[0023] Figure 6 This is a schematic diagram of the disassembled structure of the three-axis movable seat in the 3D printer provided by the present invention.

[0024] Key component symbols: 1-Heating chamber, 11-Groove, 12-Door, 13-Observation window, 2-Turntable heat insulation cover, 21-Heat insulation cavity, 22-Bugbelt box, 23-Sealing plate assembly, 231-Sealing plate, 232-First sealing frame, 233-Second sealing frame, 3-Turntable drive assembly, 31-First rotating joint assembly, 32-Vertical rotating groove, 33-Second rotating joint assembly, 4-Rotating platform, 5-Nozzle assembly, 51-Nozzle section, 52- Extrusion section, 6-three-axis movable seat, 61-first movable platform, 62-second movable platform, 63-ball joint slider mechanism, 631-ball joint base, 632-slide rod, 633-rotation groove, 634-ball rotor, 635-ball joint assembly, 7-parallel drive mechanism, 8-heating mechanism, 9-cooling mechanism, 91-base, 92-air inlet assembly, 921-air inlet pipe, 93-air outlet assembly, 931-air outlet pipe, 94-air inlet slot, 95-air outlet slot. Detailed Implementation

[0025] This invention provides a 3D printer. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0026] In the description of this invention, it should be understood that the terms "middle," "inner side," "outer side," etc., indicate the orientation or positional relationship of this invention based on the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0027] Please see Figures 1 to 6This invention provides a 3D printer, including a heating chamber 1, a working chamber inside the heating chamber 1, a turntable heat shield 2 inside the working chamber, a heat insulation cavity 21 inside the turntable heat shield 21, a turntable drive assembly 3 inside the heat insulation cavity 21, a rotating platform 4 on the turntable heat shield 2, the rotating platform 4 being drivenly connected to the turntable drive assembly 3, a nozzle assembly 5 on the top of the working chamber, the nozzle assembly 5 being connected to the top of the heating chamber 1 via a three-axis movable seat 6, a parallel drive mechanism 7 outside the heating chamber 1 being drivenly connected to the three-axis movable seat 6, and a heating mechanism 8 communicating with the working chamber on the heating chamber 1; the turntable drive assembly 3 is used to drive the rotating platform 4 to perform three-axis motion.

[0028] In practical use, the design of the heating chamber 1 and the working cavity ensures temperature control during the 3D printing process. This is crucial for 3D printing technologies such as fused deposition modeling, ensuring that the material remains in a proper molten state during printing, thereby improving print quality. Secondly, the design of the turntable heat shield 2 and the heat shield cavity 21 effectively isolates heat, protecting the turntable drive assembly 3 from high temperatures, extending the equipment's lifespan, and ensuring the stability of the printing process. Furthermore, the turntable heat shield 2 has the advantage of compressing the heating space volume, significantly saving energy consumption for heating by reducing the volume of space requiring heating. Simultaneously, a smaller heating space means a shorter time for the cavity temperature to reach the required printing temperature, thus reducing waiting time and improving printing efficiency. The turntable drive assembly 3, in conjunction with the rotating platform 4, allows the printing platform to perform precise three-axis movements, which not only improves printing flexibility but also enables the printing of complex, high-precision 3D models. The three-axis movable seat 6 allows the nozzle to move freely in three-dimensional space, further improving printing flexibility and accuracy. The parallel drive mechanism 7 provides more stable and faster motion control for the three-axis movable seat 6, which is significant for improving printing speed and quality. Both the three-axis movable seat 6 and the parallel drive mechanism 7 are located outside the working chamber and are not affected by heat sources, effectively extending the equipment's lifespan. The heating mechanism 8 is connected to the working chamber, ensuring uniform temperature distribution throughout the chamber, which is particularly important for printing large or complex models.

[0029] It should be noted that the heating mechanism 8 can be a device with heating function, such as a hot air blower or an electric heating wire assembly.

[0030] It should be noted that the parallel drive mechanism 7 can be an existing parallel robot.

[0031] like Figures 1 to 6As shown, the three-axis movable seat 6 further includes a first movable platform 61 and a second movable platform 62. The first movable platform 61 is located inside the working cavity, and the second movable platform 62 is located outside the heating chamber 1. The first movable platform 61 and the second movable platform 62 are connected by at least three ball joint slider mechanisms 63. The ball joint slider mechanisms 63 are disposed on the heating chamber 1, and both ends of the ball joint slider mechanisms 63 are ball joint connected to the first movable platform 61 and the second movable platform 62, respectively. The nozzle assembly 5 includes a nozzle part 51 and a filament extrusion part 52. The filament extrusion part 52 communicates with the nozzle part 51. The nozzle part 51 is disposed on the first movable platform 61, and the filament extrusion part 52 and the parallel drive mechanism are respectively disposed on the second movable platform 62. Through the coordinated work of the first movable platform 61 and the second movable platform 62, a high-precision and flexible printing process is achieved. The first movable platform 61 is located inside the working chamber, ensuring a stable printing environment and temperature control. The second movable platform 62 is located outside the heating chamber 1, preventing high temperatures from affecting the extrusion section 52 and the parallel drive mechanism 7, thus extending the equipment's lifespan. The two platforms are connected by at least three ball-and-slider mechanisms 63. This structure not only improves the smoothness of movement but also enhances stability and accuracy during printing. The three ball-and-slider mechanisms 63 connect the first movable platform 61 and the second movable platform 62, forming a parallelogram structure, which stably transmits the three-axis motion of the second movable platform 62 to the first movable platform 61.

[0032] Furthermore, the nozzle assembly 5, positioned on the first movable platform 61, allows for more precise control of material deposition, while the parallel drive mechanism 7, located on the second movable platform 62, provides stronger power support and faster response. This design enables the 3D printer to maintain high speed and high precision when performing complex printing tasks, thereby significantly improving printing efficiency and product quality.

[0033] like Figures 1 to 6As shown, the ball-joint slider mechanism 63 further includes a ball-joint base 631 and a slide rod 632. The ball-joint base 631 is disposed on the heating chamber 1, and a rotating groove 633 is provided inside the ball-joint base 631. A rotatable ball rotor 634 is disposed inside the rotating groove 633, and a through hole is provided on the ball rotor 634. The slide rod 632 is slidably connected to the through hole, and both ends of the slide rod 632 are respectively connected to the first movable platform 61 and the second movable platform 62 through a ball-joint chain assembly 635. The ball-joint slider mechanism 63 enables the 3D printer to achieve a precise layer-by-layer printing process, ensuring that each layer of material is accurately placed in a predetermined position. The combination of the ball-joint base 631 and the slide rod 632 allows the nozzle assembly 5 to move flexibly within the heating chamber 1, while the cooperation of the ball rotor 634 and the through hole ensures the smooth movement of the slide rod 632, thereby improving the stability and accuracy of printing. Furthermore, by connecting the slide bar 632 to the first movable platform 61 and the second movable platform 62 via the ball joint assembly 635, stable support and flexible adjustment of the movable platforms can be achieved, ensuring that the first movable platform 61 and the second movable platform 62 remain horizontal during movement, further improving the controllability of the printing process and the quality of the printed product.

[0034] It should be noted that the slide bar 632 is made of a material with low thermal conductivity, such as carbon fiber or ceramic.

[0035] In one embodiment, a grease layer is provided on the rotating groove 633, the through hole, and the ball hinge assembly 635; the grease layer not only serves to lubricate, but also to seal and insulate the installation gap.

[0036] like Figures 1 to 6 As shown, the turntable heat insulation cover 2 further includes a bellows box 22, the heat insulation cavity 21 is located inside the bellows box 22, a sealing plate assembly 23 is provided on the top of the bellows box 22, the rotating platform 4 is mounted on the sealing plate assembly 23, and the turntable drive assembly 3 is connected to the sealing plate assembly 23 and the rotating platform 4 respectively. By adopting the bellows box 22 structure, the structural stability and reliability of the turntable heat insulation cover 2 are significantly improved. This ensures the accuracy and stability of the rotating platform 4 during operation. Through the implementation of effective sealing design, external heat and dust are successfully isolated, thereby protecting the turntable drive device and extending its service life. In addition, the installation environment of the turntable drive assembly 3 is optimized, improving its operating efficiency and reliability, thereby enhancing the performance of the entire equipment. The bellows box 22 structure can adjust its shape according to the motion requirements when the rotating platform 4 performs dual-axis motion, ensuring that the sealing performance is not damaged during the motion and maintaining the overall sealing effect of the system. This design not only improves the thermal insulation performance of the equipment, but also ensures its reliability and stability during dynamic movement.

[0037] like Figures 1 to 6 As shown, the heating chamber 1 is further equipped with a cooling mechanism 9, which has an air inlet and an air outlet, both of which are connected to the heat insulation cavity 21. This mechanism relies primarily on the coordinated operation of the air inlet and outlet to effectively manage the heat generated by the turntable drive assembly 3. The design of the air inlet allows air from the outside space to smoothly enter the heat insulation cavity 21. This process requires consideration not only of airflow efficiency but also of air cleanliness to prevent dust and other particles from damaging the turntable drive assembly 3. The internal structural design of the heat insulation cavity 21 is also crucial, ensuring that air flows evenly through all parts of the turntable drive assembly 3 for comprehensive cooling. After heat is absorbed, the hot air is rapidly discharged through the air outlet to ensure efficient exhaust while minimizing impact on the surrounding environment. In this way, heat accumulation within the heat insulation cavity 21 is effectively controlled, preventing performance issues caused by overheating of the turntable drive assembly 3.

[0038] like Figures 1 to 6 As shown, the cooling mechanism 9 further includes a base 91, an air inlet assembly 92, and an air outlet assembly 93. The base 91 is disposed at the bottom of the heat insulation cavity 21. The air inlet assembly 92 and the air outlet assembly 93 are respectively disposed on the heating box 1. An air inlet slot 94 and an air outlet slot 95 are respectively disposed on both sides of the base 91. The air inlet assembly 92 is connected to the air inlet slot 94, and the air outlet assembly 93 is connected to the air outlet slot 95. The air inlet assembly 92, the air inlet slot 94, the air outlet slot 95, and the air outlet assembly 93 form an air flow channel. This air flow channel can accelerate the airflow speed in the heat insulation cavity 21, thereby effectively improving the heat dissipation effect of the overall heat dissipation system and ensuring that the heat inside the turntable drive assembly 3 can be quickly removed, thereby maintaining the turntable drive assembly 3 at the optimal operating temperature.

[0039] like Figures 1 to 6As shown, further, the air inlet pipe 921 assembly includes an air inlet pipe 921; the air outlet assembly 93 includes an air outlet pipe 931; a groove 11 is provided at the bottom of the heating chamber 1, at least a portion of the air inlet pipe 921 and the air outlet pipe 931 are located within the groove 11, one end of the air inlet pipe 921 is connected to the air inlet slot 94, and one end of the air outlet pipe 931 is connected to the air outlet slot 95. Fan assemblies are respectively installed within the air inlet pipe 921 and the air outlet pipe 931. The groove 11 allows for a more reasonable installation of the air inlet pipe 921 and the air outlet pipe 931, making the overall 3D printer design more compact. The fan assembly accelerates the airflow speed within the pipes, effectively improving the overall heat dissipation effect of the cooling system. Through the operation of the fan, air can be drawn in and expelled more quickly, ensuring that the heat inside the equipment is rapidly removed, thereby maintaining the equipment at its optimal operating temperature.

[0040] like Figures 1 to 6 As shown, the turntable drive assembly 3 further includes a first rotary joint assembly 31, on which a vertical rotating groove 32 is provided. A second rotary joint assembly 33, which is pulsatorically connected to the first rotary joint assembly 31, is disposed within the vertical rotating groove 32. The output end of the second rotary joint assembly 33 extends towards the sealing plate assembly 23, passes through the sealing plate assembly 23, and connects to the rotating platform 4. The first rotary joint assembly 31 drives the rotating platform 4 to rotate vertically; the second rotary joint assembly 33 drives the rotating platform 4 to rotate horizontally. Through the first rotary joint assembly 31 and the second rotary joint assembly 33, precise control of the rotating platform 4 in both vertical and horizontal directions can be achieved, enabling three-axis motion of the rotating platform 4. The first rotary joint assembly 31 is responsible for vertical rotation, ensuring that the rotating platform 4 can rotate along the vertical axis, thereby adapting to printing requirements at different angles. The second rotary joint assembly 33 is responsible for horizontal rotation, allowing the rotating platform 4 to flexibly adjust its angle to adapt to various operating positions. This dual-joint design not only improves the flexibility and adaptability of the equipment, but also ensures that operators can perform their work in the most convenient way in complex working environments, thereby improving overall work efficiency and operational accuracy.

[0041] like Figures 1 to 6As shown, the sealing plate assembly 23 further includes a sealing plate 231, which is connected to the top opening of the bellows box 22 via a first sealing frame 232. The rotating platform 4 is mounted on the sealing plate 231, and the turntable drive assembly 3 is connected to the sealing plate 231 and the rotating platform 4 respectively. The bottom opening of the bellows box 22 is connected to the bottom of the working chamber via a second sealing frame 233. The first sealing frame 232 ensures the sealing of the gap between the sealing plate 231 and the bellows box 22, and the second sealing frame 233 ensures the sealing of the gap between the bellows box 22 and the working chamber, effectively improving the overall sealing effect of the bellows box 22 and preventing heat from entering the heat insulation cavity 21 through the installation gap.

[0042] like Figures 1 to 6 As shown, further, a door opening communicating with the working chamber is provided on one side of the heating chamber 1. A door body 12 is provided outside the door opening, and an observation window 13 is provided on the door body 12. The door body 12 is used to open or close the door opening. The door opening is used to take out and put in items. The door body 12 ensures that the door opening can maintain good sealing performance when not in use, and can also effectively prevent outside air and pollutants from entering the interior of the heating chamber 1, thereby maintaining the stability of the internal environment of the heating chamber 1. In addition, the observation window 13 on the door body 12 allows the user to view the internal condition of the chamber without opening the door body 12, reducing unnecessary temperature fluctuations and energy consumption.

[0043] In summary, the heating chamber 1 and the working cavity ensure temperature control during the 3D printing process, which is crucial for 3D printing technologies such as fused deposition modeling. This ensures the material maintains a suitable molten state during printing, thereby improving print quality. Secondly, the design of the turntable heat shield 2 and the heat shield cavity 21 effectively isolates heat transfer, providing excellent protection for the turntable drive assembly 3, avoiding the effects of high temperatures, extending the equipment's lifespan, and ensuring the stability of the printing process. Furthermore, the turntable heat shield 2 has the advantage of compressing the heating space volume. By reducing the volume of space requiring heating, energy consumption for heating can be significantly saved. Simultaneously, a smaller heating space means a shorter time for the cavity temperature to reach the required printing temperature, thus reducing waiting time in the printing process and improving printing efficiency. The coordinated work of the turntable drive assembly 3 and the rotating platform 4 enables the printing platform to perform precise three-axis movements, which not only enhances printing flexibility but also makes it possible to print complex, high-precision 3D models. The design of the three-axis movable seat 6 allows the nozzle to move freely in three-dimensional space, further improving printing flexibility and accuracy. The use of the parallel drive mechanism 7 provides more stable and faster motion control for the three-axis movable seat 6, which is of great significance for improving printing speed and print quality. Both the three-axis movable seat 6 and the parallel drive mechanism 7 are located outside the working cavity, avoiding the influence of heat sources and thus effectively extending the service life of the equipment.

[0044] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A 3D printer, characterized in that, The device includes a heating chamber, a working chamber within which a turntable heat shield is located. The heat shield contains a heat insulation cavity, and a turntable drive assembly is located within the heat insulation cavity. A rotating platform is mounted on the heat shield and is connected to the turntable drive assembly. A nozzle assembly is located at the top of the working chamber and connected to the top of the heating chamber via a three-axis movable seat. A parallel drive mechanism connected to the three-axis movable seat is located outside the heating chamber and is driven by the three-axis movable seat. A heating mechanism communicating with the working chamber is located on the heating chamber. The turntable drive assembly drives the rotating platform to perform three-axis motion. The three-axis movable seat includes a first movable platform and a second movable platform. The first movable platform is located within the working chamber, and the second movable platform... The platform is located outside the heating chamber. The first movable platform and the second movable platform are connected by at least three ball-and-slider mechanisms. The ball-and-slider mechanisms are disposed on the heating chamber, and their two ends are respectively ball-and-slider connected to the first movable platform and the second movable platform. The nozzle assembly includes a nozzle section and a wire extrusion section. The wire extrusion section communicates with the nozzle section. The nozzle section is disposed on the first movable platform. The wire extrusion section and the parallel drive mechanism are respectively disposed on the second movable platform. The turntable heat insulation cover includes a bellows box. The heat insulation cavity is located inside the bellows box. A sealing plate assembly is disposed on the top of the bellows box. The rotating platform is disposed on the sealing plate assembly, and the turntable drive assembly is respectively drivenly connected to the sealing plate assembly and the rotating platform.

2. A 3D printer according to claim 1, characterized in that, The ball joint slider mechanism includes a ball joint base and a slide rod. The ball joint base is disposed on the heating box body. A rotating groove is provided in the ball joint base. A rotatable ball rotor is disposed in the rotating groove. A through hole is provided on the ball rotor. The slide rod is slidably connected to the through hole. The two ends of the slide rod are respectively connected to the first movable platform and the second movable platform through a ball joint assembly.

3. A 3D printer according to claim 1, characterized in that, The heating chamber is equipped with a cooling mechanism, which has an air inlet and an air outlet, and the air inlet and the air outlet are respectively connected to the heat insulation cavity.

4. A 3D printer according to claim 3, characterized in that, The cooling mechanism includes a base, an air inlet assembly, and an air outlet assembly. The base is disposed at the bottom of the heat insulation cavity. The air inlet assembly and the air outlet assembly are respectively disposed on the heating box. An air inlet slot and an air outlet slot are respectively disposed on both sides of the base. The air inlet assembly is connected to the air inlet slot, and the air outlet assembly is connected to the air outlet slot.

5. A 3D printer according to claim 4, characterized in that, The air inlet assembly includes an air inlet pipe; the air outlet assembly includes an air outlet pipe; a groove is provided at the bottom of the heating box, at least a portion of the air inlet pipe and the air outlet pipe are located in the groove, one end of the air inlet pipe is connected to the air inlet slot, one end of the air outlet pipe is connected to the air outlet slot, and a fan assembly is respectively provided in the air inlet pipe and the air outlet pipe.

6. A 3D printer according to claim 1, characterized in that, The turntable drive assembly includes a first rotary joint assembly, on which a vertical rotary groove is provided. A second rotary joint assembly is provided in the vertical rotary groove and is connected to the first rotary joint assembly in a transmission manner. The output end of the second rotary joint assembly extends toward the sealing plate assembly and passes through the sealing plate assembly before connecting to the rotary platform. The first rotary joint assembly is used to drive the rotary platform to rotate in the vertical direction; the second rotary joint assembly is used to drive the rotary platform to rotate in the horizontal direction.

7. A 3D printer according to claim 1, characterized in that, The sealing plate assembly includes a sealing plate, which is connected to the top opening of the bellows box via a first sealing frame. The rotating platform is disposed on the sealing plate, and the turntable drive assembly is connected to the sealing plate and the rotating platform respectively. The bottom opening of the bellows box is connected to the bottom of the working chamber via a second sealing frame.

8. A 3D printer according to claim 1, characterized in that, A door opening communicating with the working chamber is provided on one side of the heating box. A door body is provided outside the door opening, and an observation window is provided on the door body; the door body is used to open or close the door opening.

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