3D printer with fully enclosed infrared constant temperature cavity

Abstract

This invention relates to the field of 3D printing technology, and in particular to a 3D printer with a fully enclosed infrared constant temperature cavity, including a printer body, a gantry set inside the printer body, and an extruder movably mounted on the gantry. The gantry has a built-in transmission system for driving the extruder to move laterally and longitudinally inside the printer body. A forming platform is provided at the bottom of the gantry, which is driven by the transmission system to move up and down. This invention realizes the reciprocating swing motion of the swing plate and swing ring through the swing heating component, so that the annular heating tube and the long strip heating tube can dynamically radiate the side area of ​​the forming platform in layers and at multiple angles. The fixed-point temperature compensation component is always accurately aligned with the extruded material to ensure the continuity and accuracy of temperature compensation, which significantly improves the printing quality and success rate. The turbulence temperature control component makes the infrared heat radiation continuously dispersed by the rotating turbulence plate and evenly cover all areas of the bottom of the forming platform.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and in particular to a 3D printer with a fully enclosed infrared thermostatic cavity. Background Technology

[0002] In existing 3D printing technologies, temperature control is a key factor determining printing accuracy and build quality. However, traditional 3D printers often use fixed heating elements or single fans for temperature control, making it difficult to achieve precise temperature control throughout the entire printing process. For temperature control of the side areas of the printing platform, existing equipment typically only has heating plates at the bottom of the platform, lacking active heating devices in the side areas. This results in the edge of the platform being colder than the center, making the printed parts prone to warping and deformation due to temperature differences. Even with the addition of side wall heating strips in some equipment, their fixed installation method leads to a single heat radiation angle, making it impossible to dynamically adjust the radiation direction according to platform height changes or changes in print layer height, creating localized radiation dead zones. Regarding temperature control of the bottom of the product, traditional heated beds often use a single heating plate, with heat directly conducted to the bottom of the printed part through the platform surface. However, this method relies on the thermal conductivity of the platform material, resulting in uneven heat radiation distribution and an inability to dynamically disperse heat in the bottom area. This leads to inconsistent curing speeds of the bottom layer material, affecting the adhesion of the first layer. In addition, regarding the material temperature compensation during the extrusion process, existing printers generally lack an instant heating device for the extruded material. The temperature of the molten material drops rapidly during the deposition process, resulting in insufficient interlayer bonding strength and easy delamination or cracking. Although a few devices attempt to set annular heating elements around the nozzle, their structure is fixed and cannot dynamically adjust the radiation angle and concentration according to the printing path and deposition point position, resulting in limited temperature compensation effect and greatly reducing the quality of printed products. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a 3D printer with a fully enclosed infrared constant temperature cavity.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a 3D printer with a fully enclosed infrared constant temperature cavity, comprising a printer body, a gantry frame disposed inside the printer body, and an extruder movably mounted on the gantry frame. The gantry frame has a built-in transmission system for driving the extruder to move laterally and longitudinally inside the printer body. A forming platform is provided at the bottom of the gantry frame, which is driven by the transmission system to perform lifting and lowering movements. The printer body has a swing heating assembly on its inner side wall for constant temperature control of the side area of ​​the forming platform. The swing heating assembly includes a fixed side plate and a swing plate. A rotating rod is movably connected to the top of the fixed side plate. An arc-shaped swing rod is fixedly installed on the rotating rod. A T-shaped swing column is movably sleeved on the outer periphery of the bottom of the arc-shaped swing rod. A swing plate is fixedly installed on the top of the arc-shaped swing rod. A first swing ring and a second swing ring are provided on both sides of the swing plate. The bottom of the molding platform is equipped with a turbulence temperature control component to control the temperature of the bottom of the product. Infrared heat radiation is covered to the bottom of the product through the ventilation holes opened on the molding platform. The turbulence temperature control component includes an arc-shaped base, an arc-shaped baffle and a movable heating lamp. The arc-shaped baffle moves along the arc-shaped base at the bottom of the molding platform and rotates during the movement to evenly distribute heat to the bottom area of ​​the product. The extruder is equipped with a fixed-point heating component, which is used to provide annular gathering heating for the freshly extruded and depositing printing material. The fixed-point heating component includes a support ring, a support toothed disc, and an infrared irradiation lamp. The infrared irradiation lamp is arranged around the outer periphery of the extruder printing nozzle to form an annular gathering structure.

[0005] As a preferred embodiment of the present invention, the top of the printer body is movably connected to a rotating flip cover, the swing heating assembly also includes a drive plate, the fixed side plate is fixedly installed on the inner wall of the printer body through a base rod, the inner wall of the printer body is also fixedly installed with a motor cover, the motor cover is fixedly installed with a first motor, the output end of the first motor passes through the fixed side plate through a rotating shaft and is fixedly installed with the drive plate, the T-shaped swing column is movably connected to the drive plate, and the arc-shaped swing rod rotates around the rotating rod as the center.

[0006] The swaying plate has a long heating tube fixedly installed on the side near the forming platform. The first swaying ring and the second swaying ring both have annular heating tubes fixedly installed on the side near the forming platform. The first swaying ring is fixedly installed at the top of the swaying plate, and the second swaying ring is fixedly installed at the bottom of the swaying plate. The diameter of the first swaying ring is 0.5 times the diameter of the second swaying ring. The rotating rod is fixedly installed with a connecting rod, and the connecting rod is fixedly installed with an arc-shaped fan plate, which moves on the back of the first swaying ring.

[0007] As a preferred embodiment of the present invention, the front of the printer body is provided with a movable side door, the bottom of the forming platform is fixedly installed with an arc-shaped cover, the turbulence temperature control component also includes a U-shaped movable frame, the bottom of the forming platform near the movable side door is fixedly installed with an arc-shaped base, T-shaped limiting rings are fixedly installed on both sides of the arc-shaped base, and the U-shaped movable frame is movably arranged on the outer periphery of the arc-shaped base.

[0008] The inner side of the U-shaped movable frame is evenly provided with several limiting rollers, and the limiting rollers are all movable on the T-shaped limiting ring. Several supporting racks are evenly provided at the top center of the arc-shaped base. The top of the U-shaped movable frame is movably connected to a supporting rotating rod, and a drive gear is fixedly installed on the supporting rotating rod. The drive gear and the supporting rack are movably meshed. A second motor is fixedly installed on the side of the U-shaped movable frame near the movable side door through a motor plate. One end of the supporting rotating rod is fixedly installed on the output end of the second motor. Several arc-shaped spoilers are evenly installed on the side of the supporting rotating rod away from the movable side door. A movable heating lamp is fixedly installed on the side of the U-shaped movable frame near the arc-shaped spoilers.

[0009] As a preferred embodiment of the present invention, a wire material reel is fixedly installed on the back of the printer body, and the fixed-point heating component further includes an arc-shaped gathering rod and a pulling rod. A support ring is fixedly installed on the outer periphery of the extruder, and several arc-shaped gathering rods are movably connected to the top of the support ring. A pulling rod is movably connected to the center of the top of each arc-shaped gathering rod. An annular base is fixedly installed at the top of the outer periphery of the extruder, and an annular groove is opened at the bottom of the annular base. An annular slider is slidably connected in the annular groove, and a support toothed disc is fixedly installed at the bottom of the annular slider.

[0010] The annular base is fixedly mounted with a motor frame, and a third motor is fixedly mounted inside the motor frame. A rotating gear is fixedly mounted on the output end of the third motor through a rotating shaft, and the rotating gear is movably meshed with the support gear plate. The pull rod is movably connected to the bottom of the support gear plate, and an infrared irradiation lamp is fixedly mounted on the end of the arc-shaped gathering rod away from the support ring.

[0011] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. In this invention, the reciprocating swing motion of the swing plate and swing ring is realized through the linkage drive of the drive plate and T-shaped swing column in the swing heating assembly. This enables the annular heating tube and the long strip heating tube to perform layered and multi-angle dynamic radiation on the side area of ​​the forming platform. The first swing ring and the second swing ring drive the annular heating tube to sweep back and forth across the side of the platform from different heights during the swing. The long strip heating tube supplements the heat in the middle area with the swing plate, effectively avoiding local overheating or radiation dead zones caused by the fixed heating method, and ensuring that the temperature field on the side of the platform is uniform and stable.

[0012] 2. In this invention, the rotating rod and connecting rod in the swing heating assembly drive the arc-shaped fan plate to move on the back of the first swing ring, and simultaneously disturb the surrounding airflow during the swing process; the movement of the arc-shaped fan plate promotes the flow and circulation of hot air in the side area of ​​the platform, accelerates heat diffusion and mixing, further improves the temperature uniformity of each side area, provides a stable lateral thermal barrier for the printed parts, and reduces the risk of edge warping.

[0013] 3. In this invention, the second motor in the turbulence temperature control component drives the support rotating rod to rotate, and the drive gear meshes with the support rack, forcing the U-shaped movable frame to slide smoothly along the arc-shaped base; at the same time, the support rotating rod drives the arc-shaped turbulence plate to rotate; this combined motion causes the infrared heat radiation generated by the movable heating lamp to be continuously dispersed by the rotating turbulence plate, and evenly covered to various areas at the bottom of the molding platform as the U-shaped movable frame slides in an arc, and finally dispersed to the bottom of the product through the ventilation holes, thus achieving uniform and constant temperature control of the bottom temperature.

[0014] 4. In this invention, the limiting rollers on the inner side of the spiral movable frame in the turbulence temperature control component roll on the T-shaped limiting ring, guiding the spiral movable frame to move precisely along the arc trajectory, ensuring that the composite motion of the turbulence plate's rotation and arc sliding is stable and reliable; ensuring that the heat radiation delivery path remains consistent, avoiding uneven radiation caused by movement deviation, ensuring that the bottom of the product is heated evenly from the edge to the center, and effectively preventing bottom shrinkage and deformation.

[0015] 5. In this invention, the rotating gear is driven to rotate by the third motor in the fixed-point heating component. The rotating gear meshes with the support gear disk, causing the support gear disk to rotate smoothly. The pull rod at the bottom of the support gear disk moves accordingly, pulling multiple arc-shaped gathering rods to gather towards the center. The infrared irradiation lamp fixed at the end of the arc-shaped gathering rod moves towards the center with the gathering rod, forming a ring-shaped radiation structure around the extruder nozzle. This gathers and heats the freshly extruded printing material from all sides, instantly replenishing the heat lost during the deposition process and enhancing the interlayer bonding strength.

[0016] 6. In this invention, the supporting toothed disc in the fixed-point temperature compensation component rotates smoothly within the annular slider in the annular groove. The third motor can drive the supporting toothed disc to rotate in reverse fine adjustment, causing the pull rod to push the arc-shaped gathering rod to adjust the gathering angle. This allows the infrared irradiation lamp to dynamically adjust its radiation direction according to the printing path and deposition point position, always accurately aligning with the freshly extruded material, ensuring the continuity and accuracy of temperature compensation, effectively preventing interlayer peeling or warping deformation caused by sudden temperature drops, and significantly improving printing quality and success rate.

[0017] 7. In this invention, the temperature diffusion range is expanded by designing different diameters and swing amplitudes of the first and second swing rings. The first swing ring has a smaller diameter and a smaller swing amplitude, while the second swing ring has a larger diameter and a larger swing amplitude. The combination of the two can enable the entire system to cover a wider area in space. The fine movement of the small ring may help to achieve local uniformity, while the large swing amplitude of the large ring drives the flow of air or medium over a larger area, thereby synergistically enhancing the heat diffusion effect and making the temperature distribution more uniform. The design is ingenious. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the printer body of the present invention; Figure 3 This is a schematic diagram of the gantry frame structure of the present invention; Figure 4 This is a schematic diagram of the structure of the swing plate of the present invention; Figure 5 This is a schematic diagram of the structure of the fixed side plate of the present invention; Figure 6 This is a schematic diagram of the molding platform of the present invention; Figure 7 This is a schematic diagram of the arc-shaped base of the present invention; Figure 8 This is a schematic diagram of the extruder of the present invention; Figure 9 This is a schematic diagram of the annular base structure of the present invention; Figure 10 This is a schematic diagram of the support ring structure of the present invention.

[0019] The components include: 10. Printer body; 11. Gantry frame; 12. Extruder; 13. Rotating flip cover; 14. Movable side door; 15. Forming platform; 16. Ventilation holes; 17. Wire material reel; 20. Fixed side plate; 21. Base rod; 22. Motor cover; 23. First motor; 24. Drive plate; 25. Rotating rod; 26. Arc-shaped swing rod; 27. T-shaped swing column; 28. Connecting rod; 29. ​​Arc-shaped fan plate; 30. Swing plate; 31. First swing ring; 32. Second swing ring; 33. Long strip heating tube; 34. Ring. Heating tube; 40. Arc-shaped base; 41. Arc-shaped cover; 42. T-shaped limiting ring; 43. U-shaped movable frame; 44. Limiting roller; 45. Support rack; 46. Movable heating lamp tube; 50. Support rotating rod; 51. Drive gear; 52. Second motor; 53. Arc-shaped spoiler; 60. Support ring; 61. Arc-shaped gathering rod; 62. Pulling rod; 63. Infrared irradiation lamp; 70. Annular base; 71. Annular slide groove; 72. Annular slider; 73. Support gear plate; 74. Motor frame; 75. Third motor; 76. Rotating gear. Detailed Implementation

[0020] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0021] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a 3D printer with a fully enclosed infrared constant temperature cavity includes a printer body 10, a gantry 11 disposed inside the printer body 10, and an extruder 12 movably mounted on the gantry 11. The gantry 11 has a built-in transmission system for driving the extruder 12 to move laterally and longitudinally inside the printer body 10. A forming platform 15 is provided at the bottom of the gantry 11, which is driven by the transmission system to perform lifting and lowering movements. A swing heating assembly is provided on the inner side wall of the printer body 10 for constant temperature control of the side area of ​​the forming platform 15. The swing heating assembly includes a fixed side plate 20 and a swing plate 30. A rotating rod 25 is movably connected to the top of the fixed side plate 20. An arc-shaped swing rod 26 is fixedly installed on the rotating rod 25. A T-shaped swing column 27 is movably sleeved on the outer periphery of the bottom of the arc-shaped swing rod 26. A swing plate 30 is fixedly installed on the top of the arc-shaped swing rod 26. A first swing ring 31 and a second swing ring 32 are provided on both sides of the swing plate 30. See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The top of the printer body 10 is movably connected to a rotating flip cover 13. The swing heating assembly also includes a drive plate 24. The fixed side plate 20 is fixedly installed on the inner wall of the printer body 10 via a base rod 21. A motor cover 22 is also fixedly installed on the inner wall of the printer body 10. A first motor 23 is fixedly installed inside the motor cover 22. The output end of the first motor 23 passes through the fixed side plate 20 via a rotating shaft and is fixedly installed on the drive plate 24. The T-shaped swing column 27 is movably connected to the drive plate 24. The arc-shaped swing rod 26 rotates around the rotating rod 25.

[0022] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A long heating tube 33 is fixedly installed on the side of the swing plate 30 near the forming platform 15. A ring heating tube 34 is fixedly installed on the side of the first swing ring 31 and the second swing ring 32 near the forming platform 15. The first swing ring 31 is fixedly installed at the top of the swing plate 30, while the second swing ring 32 is fixedly installed at the bottom of the swing plate 30. The diameter of the first swing ring 31 is 0.5 times the diameter of the second swing ring 32. A connecting rod 28 is fixedly installed on the rotating rod 25. An arc-shaped fan plate 29 is fixedly installed on the connecting rod 28, and the arc-shaped fan plate 29 moves on the back of the first swing ring 31. Rings with different diameters and swing amplitudes are used to expand the temperature diffusion range. The first swing ring 31 has a smaller diameter and a smaller swing amplitude, while the second swing ring 32 has a larger diameter and a larger swing amplitude. The combination of the two can make the whole system cover a wider area in space. The fine movement of the small ring may help local uniformity, while the large swing amplitude of the large ring drives a larger range of air or medium flow, thereby synergistically enhancing the heat diffusion effect and making the temperature distribution more uniform.

[0023] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 When the swing heating assembly is started, the first motor 23 begins to rotate, and its output end drives the drive plate 24 to perform circular motion through the rotating shaft. During the rotation, the drive plate 24 is movably connected to the T-shaped swing column 27, forcing the T-shaped swing column 27 to slide on the outer circumference of the bottom of the arc-shaped swing rod 26 and apply force, thereby driving the arc-shaped swing rod 26 to swing back and forth around the rotating rod 25. The swing of the arc-shaped swing rod 26 drives the swing plate 30 fixedly connected to its top to swing synchronously. The swing of the swing plate 30 further drives the first swing ring 31 and the second swing ring 32 fixed to its top and bottom to move together. The diameter of the first swing ring 31 is smaller, 0.5 times the diameter of the second swing ring 32. During the swing, the two drive each The annular heating tube 34, located near the molding platform 15, reciprocates, while the long heating tube 33 carried by the swing plate 30 also swings. During the swinging motion, the connecting rod 28 fixed on the rotating rod 25 rotates accordingly, and the connecting rod 28 drives the arc-shaped fan plate 29 to move on the back of the first swing ring 31. The movement of the arc-shaped fan plate 29 further disturbs the surrounding airflow. Through this series of movements, the first swing ring 31 and the second swing ring 32 drive the annular heating tube 34 to radiate heat to the side area of ​​the molding platform 15 from different heights and angles in a layered manner. The long heating tube 33, along with the swing plate 30, supplements the heat in the middle area, together achieving multi-angle, full-coverage constant temperature control from the bottom to the top of the platform.

[0024] See Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 The bottom of the molding platform 15 is equipped with a turbulence-controlled temperature component for constant temperature control of the bottom of the product. Infrared heat radiation is covered to the bottom of the product through the ventilation holes 16 on the molding platform 15. The turbulence-controlled temperature component includes an arc-shaped base 40, an arc-shaped baffle 53, and a movable heating lamp 46. The arc-shaped baffle 53 moves along the arc-shaped base 40 at the bottom of the molding platform 15 and rotates during the movement to evenly distribute heat to the bottom area of ​​the product. The front of the printer body 10 is equipped with a movable side door 14. An arc-shaped cover 41 is fixedly installed at the bottom of the molding platform 15. The turbulence-controlled temperature component also includes a U-shaped movable frame 43. An arc-shaped base 40 is fixedly installed at the bottom of the molding platform 15 on the side near the movable side door 14. T-shaped limit rings 42 are fixedly installed on both sides of the arc-shaped base 40. A U-shaped movable frame 43 is movably arranged on the outer periphery of the arc-shaped base 40.

[0025] See Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 The inner side of the U-shaped movable frame 43 is evenly provided with several limiting rollers 44, and the limiting rollers 44 are all movable on the T-shaped limiting ring 42. Several supporting racks 45 are evenly provided at the top center of the arc-shaped base 40. The top of the U-shaped movable frame 43 is movably connected to a supporting rotating rod 50. A drive gear 51 is fixedly installed on the supporting rotating rod 50. The drive gear 51 and the supporting rack 45 are movably meshed. A second motor 52 is fixedly installed on the side of the U-shaped movable frame 43 near the movable side door 14 through a motor plate. One end of the supporting rotating rod 50 is fixedly installed on the output end of the second motor 52. Several arc-shaped spoilers 53 are evenly installed on the side of the supporting rotating rod 50 away from the movable side door 14. A movable heating lamp tube 46 is fixedly installed on the side of the U-shaped movable frame 43 near the arc-shaped spoiler 53.

[0026] See Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 When the turbulence temperature control component is working, the second motor 52 starts, and its output drives the support rod 50 to rotate. During the rotation of the support rod 50, the drive gear 51 fixedly installed on it rotates accordingly and meshes with the support rack 45 evenly arranged on the top of the arc-shaped base 40. The drive gear 51 rolls along the support rack 45, forcing the support rod 50 as a whole to drive the loop frame 43 to move along the outer periphery of the arc-shaped base 40. Multiple limiting rollers 44 evenly arranged on the inner side of the loop frame 43 roll on the T-shaped limiting ring 42, guiding the loop frame 43 to slide smoothly along the arc-shaped trajectory.

[0027] As the U-shaped movable frame 43 slides along the arc-shaped base 40, the supporting rotating rod 50 continues to rotate, and multiple arc-shaped spoilers 53 evenly installed at the end away from the movable side door 14 rotate accordingly; at the same time, the movable heating lamp tube 46 fixed to the side of the U-shaped movable frame 43 near the arc-shaped spoiler 53 continuously radiates heat; the rotating arc-shaped spoiler 53 continuously disperses and agitates the infrared heat radiation generated by the movable heating lamp tube 46 during rotation, and guides it to the ventilation holes 16 opened at the bottom of the forming platform 15.

[0028] Through the combination of the sliding motion of the U-shaped movable frame 43 along the arc trajectory and the rotation of the arc-shaped spoiler 53, heat radiation is evenly distributed and transported to various areas at the bottom of the molding platform 15, and finally covers the bottom of the product through the ventilation holes 16, thereby achieving constant temperature control of the bottom of the product.

[0029] See Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 10 The extruder 12 is equipped with a fixed-point heating component for annularly gathering and heating the freshly extruded and depositing printing material. The fixed-point heating component includes a support ring 60, a support toothed disc 73, and an infrared irradiation lamp 63. The infrared irradiation lamp 63 is arranged around the outer periphery of the printing nozzle of the extruder 12 to form an annular gathering structure. A wire material reel 17 is fixedly installed on the back of the printer body 10. The fixed-point heating component also includes an arc-shaped gathering rod 61 and a pull rod 62. The support ring 60 is fixedly installed on the outer periphery of the extruder 12. Several arc-shaped gathering rods 61 are movably connected to the top of the support ring 60. A pull rod 62 is movably connected to the top center of each arc-shaped gathering rod 61. An annular base 70 is fixedly installed at the top of the outer periphery of the extruder 12. An annular groove 71 is opened at the bottom of the annular base 70. An annular slider 72 is slidably connected in the annular groove 71, and the support toothed disc 73 is fixedly installed at the bottom of the annular slider 72.

[0030] A motor frame 74 is fixedly installed on the annular base 70. A third motor 75 is fixedly installed inside the motor frame 74. A rotating gear 76 is fixedly installed on the output end of the third motor 75 through a rotating shaft. The rotating gear 76 is movably meshed with the support gear plate 73. The pull rod 62 is movably connected to the bottom of the support gear plate 73. An infrared irradiation lamp 63 is fixedly installed on the end of the arc-shaped gathering rod 61 away from the support ring 60.

[0031] See Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 10When the fixed-point heating component is started, the third motor 75 starts to rotate, and its output end drives the rotating gear 76 to rotate through the rotating shaft; the rotating gear 76 meshes with the support gear 73, causing the support gear 73 to rotate at the bottom of the annular base 70; during the rotation of the support gear 73, the annular slider 72 fixedly connected to its bottom slides in the annular groove 71 of the annular base 70, guiding the support gear 73 to rotate smoothly.

[0032] When the support gear 73 rotates, the pull rod 62 connected to its bottom moves accordingly; the pull rod 62 is pulled by the support gear 73, pulling multiple arc-shaped gathering rods 61 to move; the arc-shaped gathering rods 61, with the connection point with the support ring 60 as the fulcrum, gather towards the center under the pull of the pull rod 62, forming a ring structure around the nozzle of the extruder 12; the infrared irradiation lamp 63 fixed to the end of the arc-shaped gathering rod 61 moves towards the center with the arc-shaped gathering rod 61, gradually approaching the newly extruded printing material from all sides.

[0033] When the temperature compensation angle needs to be adjusted, the third motor 75 can be finely adjusted in the reverse direction, driving the rotating gear 76 to rotate in the reverse direction, causing the support gear plate 73 to rotate in the reverse direction, and the pull rod 62 to move in the reverse direction, pushing the arc-shaped gathering rod 61 to unfold outward or adjust the gathering angle; through the continuous rotation of the support gear plate 73 and the reciprocating traction of the pull rod 62, the arc-shaped gathering rod 61 drives the infrared irradiation lamp 63 to always perform dynamic gathering radiation around the deposition point, and instantly compensate for the temperature of the printing material being deposited.

[0034] Working principle: The printer is based on a fully enclosed printer body 10, which contains a gantry frame 11, an extruder 12 driven by a transmission system, and a forming platform 15. The printer body 10 has a rotating flip cover 13 on the top, a movable side door 14 on the front, and a wire material tray 17 fixed on the back. All temperature control components are arranged around the forming platform 15 and the extruder 12 to jointly create a stable infrared constant temperature environment. In the initial state, the swing heating component is in the standby position, the arc-shaped baffle 53 of the turbulence temperature control component is at the initial angle, and the infrared irradiation lamp 63 of the fixed-point supplementary heating component is in the retracted state.

[0035] The swing heating assembly is installed on the inner wall of the printer body 10 to maintain a constant temperature in the side area of ​​the forming platform 15. Its working process begins with the start of the first motor 23. The first motor 23 is fixedly installed inside the motor cover 22, and its output end passes through the fixed side plate 20 via a rotating shaft and is fixedly installed with a drive plate 24. When the first motor 23 rotates, it drives the drive plate 24 to perform a circular motion. The drive plate 24 is movably connected to the T-shaped swing column 27, transmitting the rotational motion to the T-shaped swing column 27. The T-shaped swing column 27 is sleeved on the bottom outer periphery of the arc-shaped swing rod 26, and the top of the arc-shaped swing rod 26 is fixedly installed with a swing plate 30. The arc-shaped swing rod 26 rotates around the rotating rod 25. The first motor 23 is fixedly installed inside the motor cover 22. Its output end passes through the fixed side plate 20 via a rotating shaft and is fixedly installed with a drive plate 24. When the first motor 23 is started, its output shaft rotates, which drives the drive plate 24 to rotate in a circular motion. The drive plate 24 is movably connected to the T-shaped swing column 27 during rotation, forcing the T-shaped swing column 27 to slide at the bottom of the arc-shaped swing rod 26 and apply a thrust, causing the arc-shaped swing rod 26 to swing back and forth around the rotating rod 25. The swing of the arc-shaped swing rod 26 drives the top swing plate 30 to swing synchronously, and the first swing ring 31 and the second swing ring 32 fixed on the swing plate 30 swing accordingly. The first swing ring 31 has a smaller diameter and the second swing ring 32 has a larger diameter. During the swing, the two drive the annular heating tube 34 on their respective sides near the molding platform 15 to move back and forth. At the same time, the long heating tube 33 carried by the swing plate 30 also swings along with it. The connecting rod 28 fixed on the rotating rod 25 drives the arc-shaped fan plate 29 to move on the back of the first swing ring 31, further disturbing the airflow. This series of swinging movements causes the heat radiated by the heating tube to cover the side area of ​​the molding platform 15 in layers and at multiple angles, ensuring that the temperature is uniform from the bottom to the top of the platform.

[0036] The second motor 52 starts, and its output shaft drives the support rod 50 to rotate. The drive gear 51 on the support rod 50 meshes with the support rack 45 fixed on the arc-shaped base 40, forcing the U-shaped movable frame 43 to slide along the outer periphery of the arc-shaped base 40. The limiting roller 44 on the inner side of the U-shaped movable frame 43 rolls on the T-shaped limiting ring 42 to ensure smooth sliding. At the same time, the support rod 50 drives the multiple arc-shaped baffles 53 evenly distributed at its end to rotate. The movable heating lamp 46 fixed on one side of the U-shaped movable frame 43 continuously radiates heat, and the rotating arc-shaped baffles 53 continuously disperse the heat radiation and guide it to the ventilation holes 16 at the bottom of the molding platform 15. Through the combined motion of the arc-shaped sliding of the U-shaped movable frame 43 and the rotation of the arc-shaped baffles 53, the heat radiation is evenly dispersed through the ventilation holes 16, covering the bottom area of ​​the product and maintaining a constant bottom temperature.

[0037] The third motor 75 starts, and its output shaft drives the rotating gear 76 to rotate. The rotating gear 76 meshes with the support gear 73, causing the support gear 73 to rotate smoothly at the bottom of the annular base 70. The pull rod 62 at the bottom of the support gear 73 moves accordingly, pulling multiple arc-shaped gathering rods 61. The arc-shaped gathering rods 61, with their connection point with the support ring 60 as the fulcrum, gather towards the center under the pull of the pull rod 62, forming an annular structure around the nozzle of the extruder 12. The infrared irradiation lamp 63 fixed to the end of the arc-shaped gathering rod 61 irradiates the newly extruded printing material in an annular gathering manner from all sides. As the printing process progresses, the third motor 75 can be finely adjusted in the reverse direction, so that the arc-shaped gathering rods 61 can adjust the gathering angle in time, always accurately aligning with the deposition point, and providing immediate heat replenishment to the material being deposited, preventing poor interlayer adhesion or warping deformation due to sudden temperature drops.

[0038] During the printing process, three temperature control components work in synergy. The swing heating component provides layered constant temperature radiation to the sides of the forming platform 15 through reciprocating swing; the turbulence temperature control component evenly disperses the bottom heat radiation through arc sliding and the rotation of the turbulence plate; and the fixed-point temperature compensation component gathers in time according to the printing progress to provide annular temperature compensation for the extruded material. Together, the three components create a fully enclosed infrared constant temperature environment from the sides and bottom to the deposition point, ensuring that the printing material is deposited and cured under ideal temperature conditions, significantly improving printing quality and success rate.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A 3D printer with a fully enclosed infrared constant temperature cavity, comprising a printer body (10), a gantry (11) arranged inside the printer body (10), and an extruder (12) movably mounted on the gantry (11), characterized in that, The gantry (11) is internally provided with a transmission system for driving the extruder (12) to move horizontally and longitudinally inside the printer body (10); the bottom of the gantry (11) is provided with a forming platform (15) which is driven by the transmission system to move up and down; The inner side wall of the printer body (10) is provided with a swing heating assembly for constant temperature regulation of the side area of the forming platform (15), which comprises a fixed side plate (20) and a swing plate (30); the top of the fixed side plate (20) is movably connected with a rotating rod (25), the rotating rod (25) is fixedly installed with an arc-shaped swing rod (26), the bottom of the arc-shaped swing rod (26) is movably sleeved with a T-shaped swing column (27), the top of the arc-shaped swing rod (26) is fixedly installed with the swing plate (30), and the swing plate (30) is provided with a first swing ring (31) and a second swing ring (32) on both sides. The bottom of the forming platform (15) is provided with a turbulence temperature control assembly for constant temperature control of the product bottom, which covers the product bottom with infrared heat radiation through the air holes (16) formed on the forming platform (15); the turbulence temperature control assembly comprises an arc-shaped base (40), an arc-shaped turbulence plate (53) and a movable heating lamp (46); the arc-shaped turbulence plate (53) moves along the arc-shaped base (40) at the bottom of the forming platform (15) and rotates during the movement to uniformly disperse heat to the product bottom area. The extruder (12) is provided with a fixed-point temperature compensation assembly for annular gathering temperature compensation of the just-extruded and depositing printing material; the fixed-point temperature compensation assembly comprises a support ring (60), a support gear disc (73) and an infrared irradiation lamp (63); the infrared irradiation lamp (63) is arranged around the outer periphery of the printing nozzle of the extruder (12) to form an annular gathering structure.

2. The 3D printer with a fully enclosed infrared constant temperature cavity according to claim 1, characterized in that, The top of the printer body (10) is movably connected with a rotating flap (13); the swing heating assembly further comprises a drive plate (24); the fixed side plate (20) is fixedly installed on the inner wall of the printer body (10) through a base rod (21); the inner wall of the printer body (10) is further fixedly installed with a motor cover (22); the first motor (23) is fixedly installed inside the motor cover (22); the output end of the first motor (23) is fixedly installed with the drive plate (24) through a rotating shaft penetrating through the fixed side plate (20). The T-shaped swing column (27) is movably connected with the drive plate (24), and the arc-shaped swing rod (26) rotates around the rotating rod (25).

3. The 3D printer with a fully enclosed infrared constant temperature cavity according to claim 2, characterized in that, The swing plate (30) is fixedly installed with a long heating tube (33) on the side close to the forming platform (15); the first swing ring (31) and the second swing ring (32) are both fixedly installed with an annular heating tube (34) on the side close to the forming platform (15); The first swing ring (31) is fixedly installed at the top of the swing plate (30), and the second swing ring (32) is fixedly installed at the bottom of the swing plate (30); the diameter of the first swing ring (31) is 0.5 times the diameter of the second swing ring (32).

4. The 3D printer with a fully enclosed infrared constant temperature cavity according to claim 3, characterized in that, The rotating rod (25) is fixedly installed with a connecting rod (28), the connecting rod (28) is fixedly installed with an arc-shaped fan-shaped plate (29), and the arc-shaped fan-shaped plate (29) is movable at the back of the first swing ring (31).

5. The 3D printer with a fully enclosed infrared constant temperature cavity according to claim 1, characterized in that, The front of the printer body (10) is provided with a movable side door (14), the bottom of the forming platform (15) is fixedly installed with an arc-shaped cover (41), the spoiler temperature control assembly further comprises a back-shaped movable frame (43), the forming platform (15) is fixedly installed with an arc-shaped base (40) at the bottom of one side close to the movable side door (14), the two sides of the arc-shaped base (40) are fixedly installed with T-shaped limiting rings (42), and the outer periphery of the arc-shaped base (40) is movably provided with the back-shaped movable frame (43).

6. The 3D printer with a fully enclosed infrared constant temperature cavity according to claim 5, characterized in that, The inner side of the back-shaped movable frame (43) is uniformly provided with a plurality of limiting rollers (44), and the limiting rollers (44) are movably arranged on the T-shaped limiting rings (42); the top center of the arc-shaped base (40) is uniformly provided with a plurality of supporting gear racks (45); the top of the back-shaped movable frame (43) is movably connected with a supporting rotating rod (50), the supporting rotating rod (50) is fixedly installed with a driving gear (51), and the driving gear (51) is movably engaged with the supporting gear rack (45); The back-shaped movable frame (43) is fixedly installed with a second motor (52) on one side close to the movable side door (14), one end of the supporting rotating rod (50) is fixedly installed on the output end of the second motor (52), and the supporting rotating rod (50) is uniformly installed with a plurality of arc-shaped spoiler plates (53) on the end away from the movable side door (14); the back-shaped movable frame (43) is fixedly installed with a movable heating lamp tube (46) on one side close to the arc-shaped spoiler plate (53).

7. The 3D printer with a fully enclosed infrared constant temperature cavity according to claim 1, characterized in that, The back of the printer body (10) is fixedly installed with a wire material disc (17), the fixed-point temperature supplementing assembly further comprises arc-shaped gathering rods (61) and pulling rods (62), the outer periphery of the extruder (12) is fixedly installed with a supporting ring (60), the top of the supporting ring (60) is movably connected with a plurality of arc-shaped gathering rods (61), and the top center of the arc-shaped gathering rod (61) is movably connected with a pulling rod (62); The outer periphery of the extruder (12) is fixedly installed with a ring-shaped base (70), a ring-shaped sliding groove (71) is formed in the bottom of the ring-shaped base (70), a ring-shaped sliding block (72) is slidably connected in the ring-shaped sliding groove (71), and a supporting gear (73) is fixedly installed at the bottom of the ring-shaped sliding block (72).

8. The 3D printer with a fully enclosed infrared constant temperature cavity according to claim 7, characterized in that, The ring-shaped base (70) is fixedly installed with a motor frame (74), the motor frame (74) is fixedly installed with a third motor (75) inside, the output end of the third motor (75) is fixedly installed with a rotating gear (76) through a rotating shaft, and the rotating gear (76) is movably engaged with the supporting gear (73); the pulling rod (62) is movably connected at the bottom of the supporting gear (73); The arc-shaped gathering rod (61) is fixedly installed with an infrared irradiation lamp (63) at the end away from the supporting ring (60).

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