A screw extrusion type 3D printing feeding and forming device

Abstract

This invention discloses a screw extrusion type 3D printing feeding and forming device, belonging to the field of 3D printing forming technology. This screw extrusion type 3D printing feeding and forming device includes a frame; a screw extrusion assembly is rigidly fixed to the top crossbeam of the frame via bolts through a fixing seat, and a vertically downward extrusion nozzle is provided at the end of the barrel of the screw extrusion assembly; a constant temperature feeding box is located at the top of the frame, and the bottom outlet of the constant temperature feeding box is sealed and connected to the top inlet of the screw extrusion assembly via a flanged connecting pipe; a three-axis motion platform and angle adjustment device are installed on the bottom platform of the frame via bolts through a base, and are located directly below the extrusion nozzle of the screw extrusion assembly.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, specifically to a screw extrusion type 3D printing feeding and forming device. Background Technology

[0002] Fused deposition modeling (FDM) and its derivative technology, fused extrusion granules, are mature 3D printing solutions for thermoplastic materials. The basic process involves heating and melting filamentary or granular material in a lightweight extrusion mechanism, then extruding it through a nozzle. This extrusion mechanism is driven by a motion module for planar motion, while the printing platform typically only performs Z-axis vertical movement. For general-purpose plastics with low melting points and good flowability, the impact of the extrusion mechanism's inertia on printing accuracy is still within a controllable range due to the relatively light weight of the mechanism itself.

[0003] However, when 3D printing applications expand to high-performance engineering plastics, dynamically cross-linked polymers, or thermosetting polymers that require forced conveying and full plasticization using screw extruders, the aforementioned traditional technical solutions reveal their design flaws. Full plasticization of high-performance materials necessitates a screw extrusion mechanism with a larger aspect ratio and higher drive power—a massive unit. Mounting it on the X / Y motion module generates enormous inertia during printing start-up, stopping, and direction switching, leading to severe equipment vibration, overshoot in the printing path, and reduced printing accuracy; furthermore, the final molded parts contain voids and air bubbles. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems in the prior art and provide a screw extrusion type 3D printing feeding and forming device.

[0005] This invention provides a screw extrusion type 3D printing feeding and forming device. The frame includes a bottom platform, a frame composed of several vertical bars and several horizontal bars; a screw extrusion assembly is installed on the vertical bars by a horizontal mounting rod, and the barrel end of the screw extrusion assembly is provided with a vertically downward extrusion nozzle; A three-axis motion platform and angle adjustment device are bolted to the bottom platform of the frame and located directly below the extrusion nozzle of the screw extrusion assembly. The three-axis motion platform and angle adjustment device include a Z-axis lifting module, an XY-axis linkage module, and an angle adjustment mechanism connected sequentially from top to bottom. The XY-axis linkage module is mounted on the motion platform, and the Z-axis lifting module is mounted on the adjustment block of the XY-axis linkage module. The adjustment end of the Z-axis lifting module is connected to the printing heated bed. An infrared curing device is installed on the side of the screw extrusion assembly and is used to cure the 3D printed parts.

[0006] Preferably, the angle adjustment mechanism includes a support plate, a support block, an adjusting screw, a hinge rod, and a moving platform. The support plate is mounted on the bottom platform of the frame. A pair of support blocks are provided on the support plate. The adjusting screw is rotatably inserted into the pair of support blocks. One end of the adjusting screw is connected to a drive motor. The moving platform is hinged to the support plate. A first moving block is threaded onto the adjusting screw. The first moving block is hinged to the moving platform through the hinge rod.

[0007] Preferably, the infrared curing device includes a support base, a circular guide rail, a small gear, and an infrared curing lamp: the support base is sleeved on the screw extrusion assembly, the circular guide rail is fixedly connected above the support base, one side of the circular guide rail meshes with the small gear, the small gear is fixedly connected to the output end of a rotary motor, the rotary motor is mounted on the crossbar, a bracket is fixedly connected to the lower part of the rotary motor housing, a vertical adjustment component is provided on the bracket, and the infrared curing lamp is sleeved on the adjustment end of the vertical adjustment component; Preferably, the vertical adjustment assembly includes a second adjusting screw, a worm gear, a worm, and a second moving block. The second adjusting screw is vertically rotatably mounted on the bracket. The worm gear is threaded onto the second adjusting screw, and the worm meshes with the worm gear. The second moving block encloses the worm gear and the worm. One end of the worm rotates through the second moving block. The infrared curing lamp is fixedly connected to the side of the second moving block facing the screw extrusion assembly.

[0008] Preferably, the constant temperature feeding box includes a box body and several horizontally arranged electric heating tubes. The box body is fixedly installed on the crossbar, and a constant temperature box feed port is opened at the bottom and the side. A fixing plate is vertically installed inside the box body, and the several electric heating tubes are all fixedly installed on the fixing plate. A constant temperature box controller is provided on the outside of the box body. A discharge port is provided at the bottom of the box body, and a pair of heat-insulating pipes are connected to the discharge port. A discharge outlet is opened at the bottom of each pair of heat-insulating pipes, and the discharge outlet is connected to the feed port of the screw extrusion assembly.

[0009] Preferably, a control component is rotatably connected to the top of the screw extrusion assembly, including a rotating disk and rotating rods. The rotating disk is rotatably sleeved on the top of the screw extrusion assembly, and several rotating rods are arranged in an array along the outer side of the rotating disk. A mounting hole is provided at the center of the rotating disk, and a mounting rod is provided at the bottom of the constant temperature feed box. A pair of heat insulation pipes are placed inside the rotating disk, and the bottom of the constant temperature feed box is in close contact with the rotating disk.

[0010] Preferably, the infrared heating curing device further includes a temperature sensor and a controller. The temperature sensor is used to monitor the temperature of the printed workpiece surface in real time and provide feedback to the controller. The controller controls the height of the telescopic drive arm and the power of the infrared radiating head in conjunction with the temperature feedback data and the current printing path.

[0011] Preferably, the constant temperature feeding box has a sandwich structure, with insulation material filled inside and heating pipes coiled around it, so as to maintain a constant temperature environment of 60℃~80℃ in the internal cavity.

[0012] Compared with the prior art, the beneficial effects of the present invention are: The frame, serving as the overall support structure, ensures the rigidity and stability of the device, providing a solid foundation for other components. The screw extrusion assembly is fixed to the frame, avoiding the inertial vibration and path overshoot issues caused by the extrusion assembly moving with the motion platform in traditional solutions. This allows the equipment to accommodate screws with larger length-to-diameter ratios, improving the plasticizing effect on high-performance engineering plastics, while also supporting higher-power extrusion motors, thus significantly improving printing efficiency and quality.

[0013] The three-axis motion platform and angle adjustment device are mounted on the bottom platform of the frame, directly below the extrusion nozzle, with the printing heated bed fixed at its top. Through linear motion and angular deflection along the X, Y, and Z axes, it enables supportless printing of complex structures. When printing overhanging structures, the platform tilts to ensure the printed layer remains perpendicular to the nozzle axis, transforming the suspended portion into a stack on an inclined surface, thus enhancing structural strength.

[0014] The constant temperature feeding box maintains a constant temperature and dry environment through a sandwiched insulated box, online preheating with horizontal electric heating tubes, sealed conveying with flange-connected insulated throat pipes, and on-demand feeding with a rotating disc control component. It isolates external humidity to prevent evaporation, allowing the material to enter the screw in a uniform plasticized state, eliminating conditions for the formation of bubbles and voids, achieving uniform material melting, and significantly improving the interlayer bonding and structural strength of the printed parts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the three-axis motion platform and angle adjustment device of the present invention.

[0017] Figure 3 This is a schematic diagram of the constant temperature feed box structure of the present invention.

[0018] Figure 4 This is a schematic diagram of the infrared curing device and vertical adjustment component of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Frame; 101. Bottom platform; 102. Vertical rod; 103. Horizontal rod; 2. Screw extrusion assembly; 3. Constant temperature feed box; 31. Electric heating tube; 32. Constant temperature box feed inlet; 33. Fixing plate; 34. Constant temperature box controller; 35. Insulated throat; 36. Discharge outlet; 4. Three-axis motion platform and angle adjustment device; 41. Z-axis lifting module; 42. XY-axis linkage module; 43. Angle adjustment mechanism; 44. Printing heated bed; 5. Infrared curing device; 51. Support base; 52. Circular guide rail; 53. Small gear; 54. Infrared curing lamp; 55. Rotary motor; 6. Vertical adjustment assembly; 61. Second adjusting screw; 62. Worm gear; 63. Worm; 64. Second moving block; 7. Control assembly; 71. Rotating disk; 72. Rotating rod. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-4 To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art.

[0021] The terms "first," "second," and similar words used in the specification and claims of this patent application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Words such as "comprising" or "including" indicate that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," "lower," "far," "near," "front," and "rear" are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The drawings in this invention are not strictly drawn to scale; the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0022] This invention provides a screw extrusion type 3D printing feeding and forming device, such as... Figures 1-4As shown, the device includes a frame 1, which consists of a bottom platform 101, several vertical rods 102, and several horizontal rods 103; a screw extrusion assembly 2, which is mounted on the vertical rods 102 via horizontal mounting rods, and the end of the barrel of the screw extrusion assembly 2 is provided with a vertically downward extrusion nozzle; a constant temperature feed box 3, which is located on the top of the frame 1, and the bottom outlet of the constant temperature feed box 3 is connected to the feed port at the top of the screw extrusion assembly 2 via a flange connection pipe; a three-axis motion platform and angle adjustment device 4, which are bolted to the bottom platform 101 of the frame 1 and located directly below the extrusion nozzle of the screw extrusion assembly 2, and a printing heated bed 44 is fixed on its top; and an infrared curing device 5, which is installed on the side of the screw extrusion assembly 2 for curing the 3D printed parts.

[0023] In this embodiment, the frame 1, serving as the overall support frame, consists of a bottom platform 101, a vertical rod 102, and a horizontal rod 103, ensuring the rigidity and stability of the device and providing a solid foundation for other components. The screw extrusion assembly 2 is fixed to the upper end of the vertical rod 102 via a horizontal mounting rod, with a vertically downward extrusion nozzle at its end. This avoids the inertial vibration and path overshoot problems caused by the extrusion assembly moving with the motion platform in traditional solutions. This allows the equipment to accommodate screws with larger length-to-diameter ratios, improving the plasticizing effect on high-performance engineering plastics, while supporting higher-power extrusion motors, thus significantly improving printing efficiency and quality.

[0024] The three-axis motion platform and angle adjustment device 4 are mounted on the bottom platform 101 of the frame 1, located directly below the extrusion nozzle, with the printing heated bed 44 fixed on top. This platform achieves unsupported printing of complex structures through linear motion and angular deflection along the X, Y, and Z axes. For example, when printing overhanging structures, the platform tilts to ensure the printed layers are always perpendicular to the nozzle axis, transforming the suspended portion into a stack on an inclined surface, thus enhancing structural strength.

[0025] Because existing extruders directly pour granular material from the hopper into the moving screw extrusion assembly, the granular material is completely exposed to the air from the hopper to the screw hopper. This causes it to absorb moisture from the environment, which quickly evaporates into water vapor. Since the screw extruder barrel is a closed space without an exhaust design, the water vapor cannot be discharged in time, forming tiny bubbles in the molten material. If these bubbles are extruded with the material and deposited in the printing layer, they will leave voids in the final part. The constant temperature feeding box 3 maintains a constant temperature and dry environment through a sandwiched insulated box, online preheating with horizontal electric heating tubes, sealed conveying with flange-connected insulated throat pipes, and on-demand feeding with a rotating disc control component. This design isolates external humidity to prevent evaporation, allowing the material to enter the screw in a uniform plasticized state. This eliminates the conditions for bubble and void formation, achieves uniform material melting, and significantly improves the interlayer bonding and structural strength of the printed part.

[0026] Preferred, such as Figures 1-2As shown, the three-axis motion platform and angle adjustment device 4 includes a Z-axis lifting module 41, an XY-axis linkage module 42, and an angle adjustment mechanism 43 connected sequentially from top to bottom. The angle adjustment mechanism 43 includes a support plate, a support block, an adjusting screw, a hinge rod, and a moving platform. The support plate is installed on the bottom platform 101 of the frame 1. A pair of support blocks are provided on the support plate. The adjusting screw is rotatably inserted into the pair of support blocks. One end of the adjusting screw is connected to a drive motor. The moving platform is hinged to the support plate. A first moving block is threaded on the adjusting screw. The first moving block is hinged to the moving platform through the hinge rod. The XY-axis linkage module 42 is installed on the moving platform. The Z-axis lifting module 41 is installed on the adjusting block of the XY-axis linkage module 42.

[0027] In this embodiment, the drive motor rotates the adjusting screw, causing the first moving block to deflect the moving platform via the hinge rod, thus achieving precise angle control of the printing heated bed 44. For example, when printing a 45° overhanging tubular structure, the platform tilt ensures that the deposited layer is always guided towards the nozzle, allowing for stacking without the need for support material and reducing post-processing time. Simultaneously, the coordinated movement of the XY-axis linkage module 42 and the Z-axis lifting module 41 ensures high-precision tracking of complex paths, avoiding overshoot caused by inertia, making it particularly suitable for unsupported printing of dynamically cross-linked polymers.

[0028] Preferred, such as Figures 1-4 As shown, the infrared curing device 5 includes a support base 51, a circular guide rail 52, a small gear 53, and an infrared curing lamp 54. The support base 51 is sleeved on the screw extrusion assembly 2. The circular guide rail 52 is fixedly connected above the support base 51. One side of the circular guide rail 52 meshes with the small gear 53. The small gear 53 is fixedly connected to the output end of the rotary motor 55. The rotary motor 55 is mounted on the crossbar 103. A bracket is fixedly connected to the lower part of the rotary motor 55 housing. A vertical adjustment assembly 6 is provided on the bracket. The infrared curing lamp 54 is sleeved on the adjustment end of the vertical adjustment assembly 6.

[0029] In this embodiment, the infrared lamp achieves 360° rotation and height adaptive adjustment, ensuring that the curing energy is precisely focused on the printed layer. For example, the rotary motor 55 drives the small gear 53 to mesh with the circular guide rail 52, allowing the infrared lamp to adjust its angle in real time following the printing path. When printing curved structures, the infrared lamp rotates to the optimal position, improving radiation uniformity and preventing localized overheating. Simultaneously, the vertical adjustment component 6 allows for infrared lamp height adjustment to match the curing requirements of different materials. For example, close-range irradiation of thermosetting polymers shortens the crosslinking reaction completion time and increases interlayer strength. Furthermore, the worm gear 62 and worm 63 transmission have self-locking properties to prevent displacement and ensure a stable curing process.

[0030] Preferred, such as Figures 1-3As shown, the vertical adjustment assembly 6 includes a second adjusting screw 61, a worm gear 62, a worm 63, and a second moving block 64. The second adjusting screw 61 is vertically rotatably mounted on the bracket. The worm gear 62 is threaded onto the second adjusting screw 61. The worm 63 meshes with the worm gear 62. The second moving block 64 encloses the worm gear 62 and the worm 63. One end of the worm 63 rotates through the second moving block 64. An infrared curing lamp 54 is fixedly connected to the side of the second moving block 64 facing the screw extrusion assembly 2.

[0031] In this embodiment, the worm gear 63 drives the worm wheel 62 to rotate the second adjusting screw 61, causing the second moving block 64 to rise and fall smoothly. For example, when printing high-viscosity thermosetting polymers, the infrared lamp can be lowered to a close distance to provide high-intensity radiation, promoting the completion of the crosslinking reaction and preventing the material strip from collapsing. The worm wheel 62 and worm gear 63 transmission has self-locking properties to prevent accidental displacement and ensure a stable curing process.

[0032] Preferred, such as Figures 1-3 As shown, the constant temperature feeding box 3 includes a box body and several horizontally arranged electric heating tubes 31. The box body is fixedly installed on the crossbar 103. The bottom and side of the box body are provided with constant temperature box inlets 32. The box body is provided with a vertical fixing plate 33. The several electric heating tubes 31 are all fixedly installed on the fixing plate 33. The box body is provided with a constant temperature box controller 34. The bottom of the box body is provided with a discharge port. The discharge port is connected to a pair of heat insulation pipes 35. The bottom of the pair of heat insulation pipes 35 is provided with a discharge outlet 36. The discharge outlet 36 is connected to the feed port of the screw extrusion assembly 2.

[0033] In this embodiment, the electric heating tube 31 is horizontally mounted on the fixed plate 33, ensuring a uniform temperature of 60°C to 80°C within the chamber. This preheating results in more uniform melting of the material and reduces the rate of extruded bubbles. The heat-insulating throat 35 is connected via a flange to ensure a seal and prevent moisture intrusion. The rotating disk 71 and rotating rod 72 in the control assembly 7 facilitate feed adjustment. For example, rotating the rotating disk 71 can control the gravity conveying of the material, enabling intermittent feeding, reducing energy consumption, and is particularly suitable for continuous printing of hygroscopic materials.

[0034] Preferred, such as Figure 4 As shown, a control component 7 is rotatably connected to the top of the screw extrusion assembly 2, including a rotating disk 71 and rotating rods 72. The rotating disk 71 is rotatably sleeved on the top of the screw extrusion assembly 2, and several rotating rods 72 are arranged in an array along the outer side of the rotating disk 71. An installation hole is provided at the center of the rotating disk 71. An installation rod is provided at the bottom of the constant temperature feed box 3. A pair of heat insulation pipes 35 are placed inside the rotating disk 71, and the bottom of the constant temperature feed box 3 is in close contact with the rotating disk 71.

[0035] In this embodiment, feed control is simplified, enabling precise adjustment of material flow. The rotating disk 71 is arranged in an array of rotating rods 72, which can be manually or driven by a motor to control the opening and closing of the heat-insulating throat 35. For example, when printing hygroscopic materials, rotating the rotating disk 71 can shut off the feed, preventing material exposure and shortening the preheating time. The bottom of the constant temperature feed box 3 is in close contact with the rotating disk 71, improving sealing, preventing heat loss, and reducing energy consumption.

[0036] Preferred, such as Figure 4 As shown, the infrared heating curing device also includes a temperature sensor and a controller. The temperature sensor is used to monitor the temperature of the printed workpiece surface in real time and feed it back to the controller. The controller controls the height of the telescopic drive arm and the power of the infrared radiation head in conjunction with the temperature feedback data and the current printing path.

[0037] In this embodiment, curing parameters are dynamically optimized to improve print quality. A temperature sensor monitors the temperature of the printed layer in real time and feeds it back to the controller. The controller then adjusts the height and power of the infrared lamps according to the printing path. For example, for dynamically cross-linked polymers, when the monitored temperature is below the target value, the irradiation distance is automatically shortened and the power is increased, thereby improving interlayer bonding strength, preventing thermal damage, and reducing the warpage of the printed part.

[0038] Preferred, such as Figure 4 As shown, the thermostatic feeding box 3 has a sandwich structure, with insulation material filled inside and heating pipes coiled around it to maintain a constant temperature environment of 60℃~80℃ inside the cavity.

[0039] In this embodiment, enhanced thermal insulation performance is achieved to maintain a stable thermal environment. The sandwich structure reduces heat loss, maintaining an internal temperature of 60-80°C and improving material preheating efficiency. The coiled heating pipe design ensures uniform heat distribution, preventing localized overheating and maintaining good material flowability, making it particularly suitable for long-term continuous printing.

[0040] The method of using the screw extrusion 3D printing feeding and forming device of the present invention is as follows: Equipment preparation and material pretreatment. First, load the granular raw materials into the constant temperature feeding box 3, set the temperature through the constant temperature box controller 34, and start the electric heating tube 31 to preheat the material for 1-2 hours. Check the setting of the barrel temperature of the screw extrusion assembly 2, start the extrusion motor to run at low speed, and confirm that the nozzle is not blocked. At the same time, rotate the rotating disk 71 through the control assembly 7, adjust the opening of the heat insulation throat 35, and perform a trial feed to observe whether the material flow is uniform. Then, initialize the three-axis motion platform: calibrate the printing heated bed 44 to be level, set the origin of the X, Y, and Z axes, and return the angle adjustment mechanism 43 to zero; power on the infrared curing device 5 for self-test, and test the operation of the rotary motor 55 and the vertical adjustment assembly 6 to ensure that the infrared lamp can rotate 360° and be adjusted in height from 50mm to 200mm.

[0041] The printing process is controlled in conjunction with parameters. Loading model slice data and starting the printing program: the screw extrusion assembly 2 begins operation, the motor drives the screw to rotate, and the material, after plasticization, is extruded from the nozzle, with the extrusion force stable at 100N~200N. The three-axis motion platform moves along the path: during basic printing, the XY-axis linkage module 42 and the Z-axis lifting module 41 work together to achieve planar stacking; when encountering a hanging structure, the angle adjustment mechanism 43 is activated, driving the motor to move the adjusting screw, tilting the moving platform to keep the deposited layer perpendicular to the nozzle. Simultaneously, the infrared curing device 5 tracks in real time: the temperature sensor monitors the temperature of the printed layer, the controller compares it with the target value, and dynamically adjusts the infrared lamp by changing the irradiation angle to the focal point via the rotating motor 55. The vertical adjustment assembly 6 adjusts the height, and the power is set from 500W to 1000W, achieving curing immediately after extrusion. For example, when printing a 45° hanging tube, the platform tilts, leaving the stack unsupported, and the rotating infrared lamp irradiates the interlayer interface, with a curing time of 3~5 seconds and high interlayer bonding strength.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw extrusion type 3D printing feeding and forming device, characterized in that, The assembly includes a frame for supporting the screw extrusion assembly, characterized in that it further includes: A three-axis motion platform and angle adjustment device are bolted to the bottom platform of the frame and located directly below the extrusion nozzle of the screw extrusion assembly. The three-axis motion platform and angle adjustment device include a Z-axis lifting module, an XY-axis linkage module, and an angle adjustment mechanism connected sequentially from top to bottom. The XY-axis linkage module is mounted on the motion platform, and the Z-axis lifting module is mounted on the adjustment block of the XY-axis linkage module. The adjustment end of the Z-axis lifting module is connected to the printing heated bed. A constant-temperature feeding box is located at the top of the frame. The bottom outlet of the constant-temperature feeding box is sealed and connected to the top inlet of the screw extrusion assembly via a flanged pipe. The constant-temperature feeding box includes a box body and several horizontally arranged electric heating tubes. The box body is fixedly installed on the crossbar. The bottom and side of the box body have constant-temperature feeding ports. A fixing plate is vertically installed inside the box body, and the several electric heating tubes are fixedly installed on the fixing plate. A constant-temperature box controller is located on the outside of the box body. The bottom of the box body has an outlet, and a pair of heat-insulating pipes are fitted into the outlet. Each pair of heat-insulating pipes has a discharge outlet at its bottom, and the discharge outlet is connected to the inlet of the screw extrusion assembly. An infrared curing device is installed on the side of the screw extrusion assembly and is used to cure the 3D printed parts.

2. The screw extrusion type 3D printing feeding and forming device as described in claim 1, characterized in that, The angle adjustment mechanism includes a support plate, a support block, an adjusting screw, a hinge rod, and a moving platform. The support plate is mounted on the bottom platform of the frame. A pair of support blocks are provided on the support plate. The adjusting screw is rotatably inserted into the pair of support blocks. One end of the adjusting screw is connected to a drive motor. The moving platform is hinged to the support plate. A first moving block is threaded onto the adjusting screw. The first moving block is hinged to the moving platform through the hinge rod.

3. The screw extrusion type 3D printing feeding and forming device as described in claim 1, characterized in that, The infrared curing device includes a support base, a circular guide rail, a small gear, and an infrared curing lamp. The support base is sleeved on the screw extrusion assembly. The circular guide rail is fixedly connected above the support base. One side of the circular guide rail meshes with the small gear. The small gear is fixedly connected to the output end of a rotary motor. The rotary motor is mounted on the crossbar. A bracket is fixedly connected to the lower part of the rotary motor housing. A vertical adjustment component is provided on the bracket. The infrared curing lamp is sleeved on the adjustment end of the vertical adjustment component.

4. The screw extrusion type 3D printing feeding and forming device as described in claim 2, characterized in that, The vertical adjustment assembly includes a second adjusting screw, a worm gear, a worm, and a second moving block. The second adjusting screw is vertically rotatably mounted on the bracket. The worm gear is threaded onto the second adjusting screw, and the worm meshes with the worm gear. The second moving block encloses the worm gear and the worm. One end of the worm rotates through the second moving block. The infrared curing lamp is fixedly connected to the side of the second moving block facing the screw extrusion assembly.

5. The screw extrusion type 3D printing feeding and forming device as described in claim 3, characterized in that, The top of the screw extrusion assembly is rotatably connected to a control component, including a rotating disk and rotating rods. The rotating disk is rotatably sleeved on the top of the screw extrusion assembly. Several rotating rods are arranged in an array along the outer side of the rotating disk. An installation hole is provided at the center of the rotating disk. An installation rod is provided at the bottom of the constant temperature feed box. A pair of heat insulation pipes are placed inside the rotating disk. The bottom of the constant temperature feed box is in close contact with the rotating disk.

6. The screw extrusion type 3D printing feeding and forming device as described in claim 2, characterized in that, The infrared heating curing device also includes a temperature sensor and a controller. The temperature sensor is used to monitor the temperature of the printed workpiece surface in real time and feed it back to the controller. The controller controls the height of the telescopic drive arm and the power of the infrared radiation head in conjunction with the temperature feedback data and the current printing path.

7. The screw extrusion type 3D printing feeding and forming device as described in claim 1, characterized in that, The constant temperature feeding box has a sandwich structure, with insulation material filled inside and heating pipes coiled around it to maintain a constant temperature environment of 60℃~80℃ inside the cavity.

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