3D printing equipment and method for preparing carbon fiber composite material

Abstract

The invention relates to the technical field of 3D printers, in particular to 3D printing equipment and method for preparing a carbon fiber composite material, and the 3D printing equipment comprises a 3D printer, an extrusion head, a feeding device, a winding assembly, a winding plate, a mixing assembly and a mixing cylinder; an extrusion head is mounted on the 3D printer in a sliding manner; a feeding hole is formed in the extrusion head, a heating block and a nozzle are mounted in the extrusion head, and a feeding device is mounted on the extrusion head; a winding assembly is installed below the feeding device. A winding plate is installed in the winding assembly, and the feeding device drives the winding plate to rotate through the winding assembly to achieve winding of the carbon fibers and the photosensitive resin. A mixing assembly is arranged below the winding assembly, a mixing cylinder is installed in the mixing assembly, the winding assembly drives the mixing cylinder to move at multiple angles through the mixing assembly, uniform mixing of photosensitive resin and carbon fibers is achieved through rotary motion, the preparation quality of the carbon fiber composite material is guaranteed, and the average quality is improved.

Description

Technical Field

[0001] This invention relates to the field of 3D printer technology, specifically to a 3D printing device and method for preparing carbon fiber composite materials. Background Technology

[0002] Carbon fiber composites are composite materials formed by using carbon fiber or carbon fiber fabric as reinforcement and resin, ceramics, metals, cement, carbonaceous materials or rubber as matrix. Currently, carbon fiber composites are often produced using fused deposition modeling in 3D printing technology, which greatly reduces time and process costs and improves production efficiency.

[0003] As a commonly used device in 3D printing technology, a 3D printer typically consists of a frame, a heating plate, and an extruder head. The heating plate is slidably mounted on the frame, and the extruder head is located above the heating plate. The extruder head is slidably mounted to the frame and to the heating plate, forming a multi-axis motion, which increases the printing range. In use, carbon fiber filament and optical resin filament are fed into the extruder head through a feeding device. The heating block inside the extruder head melts the two filaments and then extrudes them from the nozzle on the extruder head onto the heating plate, completing the manufacturing of carbon fiber composite materials.

[0004] However, during the heating process, because carbon fibers are in a lumpy state and are relatively light, uneven mixing occurs when the carbon fiber wire melts and mixes with the optical resin under the action of the heating block. This results in uneven distribution of components in the produced carbon fiber composite material, leading to poor quality of the carbon fiber composite material.

[0005] In view of this, we propose a 3D printing device and method for preparing carbon fiber composite materials. Summary of the Invention

[0006] The purpose of this invention is to provide a 3D printing device and method for preparing carbon fiber composite materials, so as to solve the problem of uneven mixing of carbon fiber and optical resin mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a 3D printing device and method for preparing carbon fiber composite materials: A 3D printing device for preparing carbon fiber composite materials includes a 3D printer, an extruder head, a feeding device, a winding assembly, a winding plate, a mixing assembly, and a mixing cylinder. The extruder head is slidably mounted on the 3D printer. The extruder head melts carbon fiber and photosensitive resin, uniformly mixing them before extrusion to form the carbon fiber composite material. The extruder head has a feed inlet for the carbon fiber and photosensitive resin to enter. A heating block and a nozzle are installed inside the extruder head. The nozzle is rotatably mounted on the heating block. The feed inlet and nozzle are located on the same central axis. The carbon fiber and photosensitive resin entering the extruder head are melted and mixed by the heating block, and then extruded under high pressure through the nozzle to form the carbon fiber composite material. The extruder head is equipped with a feeding device for continuously conveying carbon fiber and photosensitive resin, enabling continuous preparation of the carbon fiber composite material. The feeding device is used to convey carbon fiber and photosensitive resin in a proportional manner. In the preparation of the carbon fiber composite material, carbon fiber accounts for 20% of the total content, and photosensitive resin accounts for 80%. Therefore, it is necessary to ensure that the carbon fiber and photosensitive resin are in proportion. The proportional feeding of photosensitive resin serves as a prerequisite for the uniform mixing of carbon fiber and photosensitive resin. A winding assembly is installed below the feeding device. This winding assembly is installed inside the extrusion head, located between the feed inlet and the nozzle. A winding plate is installed inside the winding assembly. When the 3D printer is operating, the feeding device drives the winding plate to rotate via the winding assembly, achieving the winding of carbon fiber and photosensitive resin. The winding assembly winds the photosensitive resin onto the carbon fiber through the winding plate, ensuring the photosensitive resin tightly wraps around the carbon fiber. When the photosensitive resin and carbon fiber move to the heating block area and melt, the photosensitive resin and carbon fiber intermingle, facilitating uniform mixing. A mixing assembly is located below the winding assembly. This mixing assembly is rotatably installed inside the heating block and contains a mixing cylinder. When the 3D printer is operating, the winding assembly drives the mixing cylinder to move at multiple angles via the mixing assembly. This multi-angle displacement of the mixing cylinder enhances the vortex effect of the molten liquid, thereby ensuring uniform mixing of carbon fiber and photosensitive resin and improving the overall quality of the produced carbon fiber composite material.

[0008] Preferably, the feeding device includes a drive motor, a drive wheel, a carbon fiber feeding wheel, a photosensitive resin feeding wheel, and an auxiliary wheel; the drive motor is fixedly mounted on the extrusion head, and the drive wheel is fixedly mounted on the drive motor; the drive wheel is rotatably mounted to the extrusion head, and the carbon fiber feeding wheel and the photosensitive resin feeding wheel are respectively mounted on both sides of the drive motor; the diameter of the carbon fiber feeding wheel is larger than the diameter of the photosensitive resin feeding wheel, and an auxiliary wheel is respectively mounted on one side of the carbon fiber feeding wheel and the photosensitive resin feeding wheel; the auxiliary wheel is rotatably mounted on the extrusion head, and when the feeding device is working, the drive motor starts and drives the drive wheel fixedly connected to it to rotate synchronously, and the drive wheel moves from... The carbon fiber feeding wheel and the photosensitive resin feeding wheel rotate synchronously. Since the diameter of the photosensitive resin feeding wheel is smaller than that of the carbon fiber resin feeding wheel, the transmission ratio between the photosensitive resin feeding wheel and the driving wheel is greater than that between the carbon fiber feeding wheel and the driving wheel. This results in the photosensitive resin feeding wheel rotating at a higher speed than the carbon fiber feeding wheel, thus ensuring that the amount of photosensitive resin conveyed is greater than that of carbon fiber. At the same time, since both are driven by the driving wheel, a proportional conveying is achieved. The photosensitive resin feeding wheel and the carbon fiber feeding wheel drive the wire to move through the friction between themselves and the wire. During the movement of the wire, the auxiliary wheel guides the movement of the wire.

[0009] Preferably, the winding assembly includes a drive shaft, a drive wheel, a drive wheel, a bundled tube, and a guide ring; the drive shaft is fixedly installed with the photosensitive resin feeding wheel, and the drive wheel is fixedly installed on the drive shaft; a drive wheel is provided on one side of the drive wheel; the drive wheel is rotatably installed with the inner wall of the extruder head, and a bundled tube is fixedly installed below the drive wheel; a bevel gear is provided below the bundled tube, and a fastening protrusion is provided inside the bundled tube; a winding plate is installed inside the drive wheel, and a hemispherical fixing groove is opened on the winding plate; a guide ring is provided above the bundled tube, and a slot is opened on the guide ring. The guide ring is rotatably installed in the feed inlet. When the feeding device feeds, the photosensitive resin and carbon fiber enter the extruder head through the guide ring. The guide ring limits the position of the photosensitive resin and carbon fiber to ensure the stability of their movement. The carbon fiber maintains its vertical stability through the slot on the guide ring, and the photosensitive resin... The photosensitive resin feeder enters the fixed groove on the winding plate through the slot on the guide ring and connects with the winding plate. The rotation of the photosensitive resin feeder wheel drives the drive shaft to rotate synchronously. The drive shaft then drives the drive wheel to rotate synchronously. During the rotation of the drive wheel, it meshes with the drive wheel, driving the drive wheel to rotate. When the drive wheel rotates, it drives the winding plate and the bundling cylinder to rotate synchronously. The winding plate drives the photosensitive resin in the fixed groove to rotate around the carbon fiber as the axis, thus causing the photosensitive resin to wind onto the carbon fiber. After the photosensitive resin and carbon fiber are wound, the photosensitive resin and carbon fiber enter the bundling cylinder. The bundling cylinder guides the movement of the carbon fiber and photosensitive resin, while preventing the wound photosensitive resin and carbon fiber from loosening. At the same time, the fastening protrusions in the bundling cylinder and the photosensitive resin wound on the carbon fiber increase the squeezing force on the photosensitive resin, thus making the photosensitive resin and carbon fiber adhere more tightly and preventing the photosensitive resin and carbon fiber from loosening.

[0010] Preferably, the slot is a chain-like circular structure, which corresponds to the fixing slot. The chain-like circular structure of the slot is composed of three circular structures. The central circular structure is used to pass through the carbon fiber, thereby ensuring that the carbon fiber is always on the central axis, which facilitates the winding of the photosensitive resin. The circular structures on both sides are used to fix the photosensitive resin, so that the photosensitive resin is always on the outer circumference of the carbon fiber. At the same time, the slot plays a guiding role. When the carbon fiber and photosensitive resin pass through the guide ring and enter the extruder for the first time, the guide ring can be manually rotated first. The position of the winding plate can be observed through the slot on the guide ring, so that any one of the circular structures at both ends of the chain-like circular structure is aligned with the fixing slot on the winding plate, so that the photosensitive resin enters the fixing slot through the slot and connects with the winding plate.

[0011] Preferably, the fixing groove is provided with a guide surface, and the guide plate is used to guide the photosensitive resin to enter, so that the photosensitive resin can smoothly enter the fixing groove and connect with the winding plate, thereby reducing the time for the photosensitive resin to smoothly pass through the fixing groove and improving the preparation efficiency.

[0012] Preferably, the mixing assembly includes a reversing wheel, a fixed shaft, a driven wheel, a rotating drum, and a drive plate; the reversing wheel meshes with the bundled cylinder, the reversing wheel is rotatably mounted inside the extruder head via the fixed shaft, and a driven wheel is provided below the reversing wheel; the driven wheel is fixedly mounted to the rotating drum; the rotating drum is rotatably mounted to the heating block, and a sliding cavity is provided on the rotating drum, within which a mixing cylinder is slidably mounted; the mixing cylinder is divided into a driving section and a mixing section, the driving section being located above the heating block and having a reciprocating groove; the mixing section being located inside the heating block and having mixing protrusions linearly arrayed on it; the drive plate is rotatably connected to the fixed shaft via a bearing, and a drive block that cooperates with the reciprocating groove is provided on the drive plate; during the synchronous rotation of the bundled cylinder following the driving wheel, the bevel gear teeth at the lower end of the bundled cylinder mesh with the reversing wheel, thereby driving the reversing wheel to rotate. The reversing wheel, under the action of the fixed shaft, ensures its stable rotation. The reversing wheel then meshes with the driven wheel, which drives the rotating drum to rotate synchronously. The reversing wheel drives the driven wheel to mesh with the bundling drum, causing the rotating drum and the bundling drum to rotate in opposite directions. During the rotation of the rotating drum, the mixing drum rotates synchronously. The mixing drum disturbs the molten photosensitive resin and carbon fiber through the mixing protrusions, making the two evenly mixed. At the same time, the opposite rotation of the rotating drum and the bundling drum further enhances the mixing effect. This is because inertial forces are generated during the winding process. When the inertial forces are transmitted to the melting section, they cause the solution of photosensitive resin and carbon fiber to have a certain swirling flow tendency. Since the rotation direction of the rotating drum is opposite to that of the bundling drum, a force with opposite swirling direction is generated. The collision of the two forces with different swirling directions enhances the turbulence in the melting section, thereby enhancing the uniform mixing of photosensitive resin and carbon fiber.

[0013] Preferably, the rotating drum is provided with a spiral guide groove, the spiral guide groove rotating in the same direction as the rotating drum. The spiral guide groove guides the molten photosensitive resin and carbon fiber, causing the solution to move in a spiral motion, thereby promoting the uniform mixing of the two. During the rotation of the drum, the solution inside the drum will rotate synchronously, and the solution inside the drum will generate a certain centripetal force, thereby promoting the centripetal movement of the photosensitive resin on the outer side and mixing with the carbon fiber on the middle line, thus promoting the uniform mixing of the two. At the same time, since the spiral guide groove rotates in the same direction as the rotating drum, it guides the solution to rotate in a spiral, further promoting the generation of centripetal force, causing the photosensitive resin and carbon fiber liquid to rotate, enhancing the mixing effect of the photosensitive resin and carbon fiber.

[0014] Preferably, the mixing bump has an overall inverted frustum shape, which cooperates with the spiral drainage channel. The length of the mixing bump gradually increases from top to bottom, thus forming a frustum shape. The frustum shape is the same as the shape of the solution rotation caused by the centripetal force generated when the spiral drainage channel and the rotating drum rotate. For example, when water is in a cup, if the cup is rotated quickly, the water in the cup will rotate under the action of centripetal force. At this time, the water in the upper layer is close to the cup wall, and the water in the lower layer is close to the center, forming a shape similar to a frustum shape. The frustum shape enhances the contact efficiency between the mixing bump and the molten liquid, reducing energy consumption while ensuring the mixing efficiency of the mixing bump on the molten liquid of photosensitive resin and carbon fiber, and ensuring the uniform mixing of photosensitive resin and carbon fiber.

[0015] Preferably, the mixing bumps have a rhomboid structure, and the mixing bumps are arranged alternately in vertical positions. The rhomboid structure of the mixing bumps can enhance the force on the molten liquid through the multi-angle of the edges, so that the mixing bumps can enhance the disturbance of the molten liquid through the edges during rotation and reciprocating motion, thereby enhancing the uniform mixing of photosensitive resin and carbon fiber. The alternating arrangement of the mixing bumps reduces the number of mixing bumps, ensuring the mixing efficiency of the mixing bumps on the molten liquid and avoiding waste of resources. At the same time, it avoids the problem of excessive resistance when the mixing cylinder moves upward due to too many mixing bumps, which would lead to increased energy consumption, thus improving the mixing efficiency.

[0016] A method for preparing carbon fiber composite materials includes the following steps: Step 1: Adjust the position of the winding assembly to facilitate the entry of photosensitive resin and carbon fiber; Adjusting the position of the winding assembly exposes the fixing groove of the winding plate, making it easier for the photosensitive resin to be fixed to the winding plate through the fixing groove; Step 2: Feed the photosensitive resin and carbon fiber into the extruder using a feeding device; The feeding device is activated to deliver photosensitive resin and carbon fiber in equal proportions, so that the photosensitive resin and carbon fiber enter the extruder through the feed port; Step 3: The winding assembly drives the winding plate to wind the photosensitive resin onto the carbon fiber; The winding assembly drives the winding plate to rotate around the carbon fiber as the central axis, so that the photosensitive resin is wound onto the carbon fiber; Step 4: The wound carbon fiber is fed into the heating block area; The wound carbon fiber is fed into the heating block area for heating and melting; Step 5: The mixing component drives the mixing cylinder to uniformly mix the molten liquid; The mixing component drives the mixing cylinder to rotate at multiple angles, uniformly mixing the molten liquid and ensuring that the photosensitive resin and carbon fiber are mixed evenly. Step 6: After mixing, the molten liquid is extruded from the nozzle to form a carbon fiber composite material; After mixing, the molten liquid is extruded from the nozzle under high pressure and sprayed onto the 3D printer to produce carbon fiber composite material.

[0017] Compared with the prior art, the beneficial effects of the present invention are: A 3D printing device and method for preparing carbon fiber composite materials. The present invention achieves uniform mixing of photosensitive resin and carbon fiber through the cooperation of winding component and mixing component, thereby ensuring the preparation quality of carbon fiber composite materials.

[0018] A 3D printing device and method for preparing carbon fiber composite materials. The present invention achieves a unified coordination between the feeding device and the winding component, thereby avoiding excessive photosensitive resin and thus preventing misalignment of the carbon fiber composite material preparation ratio.

[0019] A 3D printing device and method for preparing carbon fiber composite materials. The present invention improves the mixing efficiency of photosensitive resin and carbon fiber by cooperating the mixing component and the mixing cylinder, thereby ensuring production quality and improving production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the 3D printer of the present invention; Figure 2 This is a schematic diagram of the overall extrusion head of the present invention; Figure 3 This is a half-sectional schematic diagram of the extruder head of the present invention; Figure 4 For the present invention Figure 3 A magnified view of point A; Figure 5 This is a half-sectional schematic diagram of the feeding device of the present invention; Figure 6 For the present invention Figure 5 A magnified view of point B; Figure 7 This is an overall schematic diagram of the feeding device, winding assembly, and mixing assembly of the present invention; Figure 8 This is a half-sectional schematic diagram of the winding assembly of the present invention; Figure 9 This is a schematic diagram of the guide plate and winding plate of the present invention; Figure 10 This is a schematic diagram of the overall hybrid component of the present invention; Figure 11 This is a half-sectional schematic diagram of the hybrid component of the present invention; Figure 12 For the present invention Figure 11 A magnified view of point C; Figure 13 For the present invention Figure 11 A magnified view of point D; Figure 14 This is a half-sectional schematic diagram of the mixing cylinder of the present invention.

[0021] In the picture: 1. 3D printer; 2. Extruder head; 21. Feed inlet; 22. Heating block; 23. Nozzle; 3. Feeding device; 31. Drive motor; 32. Drive wheel; 33. Carbon fiber feeding wheel; 34. Photosensitive resin feeding wheel; 35. Auxiliary wheel; 4. Winding assembly; 41. Drive shaft; 42. Drive wheel; 43. Drive wheel; 44. Bundling cylinder; 441. Fastening protrusion; 45. Guide ring; 451. Slot; 4511. Chain-like circular structure; 5. Spiral winding plate; 51. Fixing groove; 511. Guide surface; 6. Mixing assembly; 61. Reversing wheel; 62. Fixed shaft; 63. Driven wheel; 64. Rotary drum; 641. Sliding cavity; 642. Spiral guide groove; 65. Drive plate; 651. Drive block; 7. Mixing cylinder; 71. Drive section; 711. Reciprocating slide; 72. Mixing section; 721. Mixing protrusion; 7211. Rhomboid structure; 722. Inverted frustum structure. Detailed Implementation

[0022] 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 embodiments of the present invention, and not all embodiments. Based on the 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.

[0023] As a commonly used device in 3D printing technology, a 3D printer typically consists of a frame, a heating plate, and an extruder head. The heating plate is slidably mounted on the frame, and the extruder head is located above the heating plate. The extruder head is slidably mounted to the frame and to the heating plate, forming a multi-axis motion, which increases the printing range. In use, carbon fiber filament and optical resin filament are fed into the extruder head through a feeding device. The heating block inside the extruder head melts the two filaments and then extrudes them from the nozzle on the extruder head onto the heating plate, completing the manufacturing of carbon fiber composite materials.

[0024] However, during the heating process, because carbon fibers are in a lumpy state and are relatively light, when the carbon fiber wires melt and mix with the optical resin under the action of the heating block, the light weight causes the melted carbon fibers to float on top of the photosensitive resin, resulting in uneven mixing of carbon fibers and photosensitive resin. This leads to uneven distribution of components in the produced carbon fiber composite material, resulting in poor quality of the carbon fiber composite material.

[0025] This invention provides a technical solution: a 3D printing device and method for preparing carbon fiber composite materials. like Figures 1 to 14 As shown, a 3D printing device for preparing carbon fiber composite materials includes a 3D printer 1, an extruder head 2, a feeding device 3, a winding assembly 4, a winding plate 5, a mixing assembly 6, and a mixing cylinder 7. The extruder head 2 is slidably mounted on the 3D printer 1. The extruder head 2 has a feed inlet 21, and a heating block 22 and a nozzle 23 are installed inside the extruder head 2. The nozzle 23 is rotatably mounted on the heating block 22. The feed inlet 21 and the nozzle 23 are located on the same central axis. The feeding device 3 is installed on the extruder head 2. The feeding device 3 is used to proportionally transport carbon fiber and photosensitive resin. A winding assembly 4 is installed below the feeding device 3; the winding assembly 4 is installed inside the extrusion head 2 and is located between the feed inlet 21 and the nozzle 23. A winding plate 5 is installed inside the winding assembly 4. When the 3D printer 1 is working, the feeding device 3 drives the winding plate 5 to rotate through the winding assembly 4 to achieve the winding of carbon fiber and photosensitive resin; a mixing assembly 6 is provided below the winding assembly 4. The mixing assembly 6 is rotatably installed inside the heating block 22. A mixing cylinder 7 is installed inside the mixing assembly 6. When the 3D printer 1 is working, the winding assembly 4 drives the mixing cylinder 7 to move at multiple angles through the mixing assembly 6. Specifically, the extruder head 2 is slidably mounted on the 3D printer 1. Through relative sliding with the 3D printer 1, multi-axis printing is achieved. The extruder head 2 is used to melt carbon fiber and photosensitive resin, so that the carbon fiber and photosensitive resin are uniformly mixed and extruded to form carbon fiber composite material. The carbon fiber and photosensitive resin enter the extruder head 2 through the feed port 21. After entering the extruder head 2, the carbon fiber and photosensitive resin are melted into liquid by the heating block 22, and then extruded under high pressure through the nozzle 23 to form carbon fiber composite material. At the same time, a cooling fan is installed on the extruder head 2 to dissipate the heat generated by the heating block 22 during operation, ensuring the temperature stability of the extruder head 2 and avoiding excessively high temperatures in some areas, which would affect the melt quality and thus reduce the production quality of carbon fiber composite material. A feeding device 3 is installed on the extruder head 2 to continuously transport carbon fiber and photosensitive resin, realizing the continuous preparation of carbon fiber composite material. In the preparation process of carbon fiber composite material, the carbon fiber content and photosensitive resin content are different. Therefore, it is necessary to ensure that the carbon fiber and photosensitive resin are transported in equal proportions, which is a prerequisite for the uniform mixing of carbon fiber and photosensitive resin. When the 3D printer 1 is working, the feeding device 3 continuously feeds material to ensure continuous production. During the operation of the feeding device 3, the feeding device 3 drives the winding plate 5 through the winding assembly 4 to wind the photosensitive resin onto the carbon fiber, so that the photosensitive resin tightly wraps around the carbon fiber. When the photosensitive resin and carbon fiber move to the heating block 22 area and melt, the photosensitive resin and carbon fiber fuse together, which facilitates uniform mixing of the carbon fiber and photosensitive resin. Since the carbon fiber and photosensitive resin use wire of the same diameter, but the required content of photosensitive resin and carbon fiber is different, assuming a ratio of 20% carbon fiber and 80% photosensitive resin is used for production... In this process, for every 1mm of carbon fiber that enters, 4mm of photosensitive resin enters. Therefore, the length of the photosensitive resin transported is greater than the length of the carbon fiber, resulting in a much larger amount of photosensitive resin accumulating in the heating block 22 area than the amount of carbon fiber. This easily leads to a larger amount of photosensitive resin being discharged. The problem of insufficient carbon fiber results in an uneven overall mass distribution of the carbon fiber composite material, leading to a reduction in the quality of the carbon fiber composite material. Moreover, since the photosensitive resin and carbon fiber are transported side by side, when the carbon fiber and photosensitive resin move to the heating block 22 area for heating and melting, the carbon fiber and photosensitive resin are clearly distributed, making it impossible for the carbon fiber and photosensitive resin to mix evenly. When the 3D printer 1 is working, the winding component 4 drives the mixing cylinder 7 to move at multiple angles through the mixing component 6. The mixing cylinder 7 is located inside the heating block 22 and corresponds to the area of ​​the molten liquid. Under the action of the mixing component 6, the mixing cylinder 7 undergoes multi-angle displacement, which enhances the vortex degree of the molten liquid, thereby making the carbon fiber and photosensitive resin uniformly mixed and improving the overall quality of the produced carbon fiber composite material.

[0026] In this embodiment, the feeding device 3 includes a drive motor 31, a drive wheel 32, a carbon fiber feeding wheel 33, a photosensitive resin feeding wheel 34, and an auxiliary wheel 35. The drive motor 31 is fixedly mounted on the extrusion head 2, and the drive wheel 32 is fixedly mounted on the drive motor 31. The drive wheel 32 is rotatably mounted to the extrusion head 2. The carbon fiber feeding wheel 33 and the photosensitive resin feeding wheel 34 are respectively mounted on both sides of the drive motor 32. The diameter of the carbon fiber feeding wheel 33 is larger than the diameter of the photosensitive resin feeding wheel 34. An auxiliary wheel 35 is respectively mounted on one side of the carbon fiber feeding wheel 33 and the photosensitive resin feeding wheel 34. The auxiliary wheel 35 is rotatably mounted on the extrusion head 2. Specifically, when the feeding device 3 is working, the drive motor 31 starts and drives the drive wheel 32, which is fixedly connected to it, to rotate synchronously. The drive wheel 32 then drives the carbon fiber feeding wheel 33 and the photosensitive resin feeding wheel 34 to rotate synchronously. Since the diameter of the photosensitive resin feeding wheel 34 is smaller than that of the carbon fiber resin feeding wheel, the transmission ratio between the photosensitive resin feeding wheel and the drive wheel 32 is greater than that between the carbon fiber feeding wheel 33 and the drive wheel 32. This results in the rotation speed of the photosensitive resin feeding wheel 34 being greater than that of the carbon fiber feeding wheel 33, thus ensuring that the content of photosensitive resin being conveyed is greater than that of carbon fiber. At the same time, since both are driven by the drive wheel 32, a proportional conveying is achieved. The photosensitive resin feeding wheel 34 and the carbon fiber feeding wheel 33 drive the wire to move through the friction between themselves and the wire. During the movement of the wire, the auxiliary wheel 35 guides the movement of the wire. Preferably, the transmission ratio between the photosensitive resin feeding wheel 34 and the carbon fiber feeding wheel 33 and the drive wheel 32 can be changed to achieve the conveying of carbon fiber and photosensitive resin in different proportions, thereby meeting the usage efficiency of multiple formulations and improving the versatility of the device. The drive wheel 43 and the transmission wheel 42 are provided with mounting blocks at their upper ends, and the inner wall of the extruder head 2 is provided with mounting openings. The drive wheel 43 and the transmission wheel 42 are rotated and installed through the cooperation of the mounting groove and the mounting opening. The mounting block can be a convex structure to ensure the stability of the drive wheel 43 and the transmission wheel 42 during rotation.

[0027] In this embodiment, the winding assembly 4 includes a drive shaft 41, a drive wheel 42, a drive wheel 43, a bundled tube 44, and a guide ring 45. The drive shaft 41 is fixedly installed with the photosensitive resin feeding wheel 34, and the drive wheel 42 is fixedly installed on the drive shaft 41. The drive wheel 43 is provided on one side of the drive wheel 42. The drive wheel 43 is rotatably installed with the inner wall of the extruder head 2, and the bundled tube 44 is fixedly installed below the drive wheel 43. The bundled tube 44 is provided with bevel gear teeth below it, and a fastening protrusion 441 is provided inside the bundled tube 44. A winding plate 5 is installed inside the drive wheel 43, and a hemispherical fixing groove 51 is provided on the winding plate 5. A guide ring 45 is provided above the bundled tube 44, and a slot 451 is provided on the guide ring 45. The guide ring 45 is rotatably installed inside the feed inlet 21. Specifically, when the feeding device 3 feeds materials, the photosensitive resin and carbon fiber enter the extruder 2 through the guide ring 45. The guide ring 45 limits the position of the photosensitive resin and carbon fiber to ensure their stability during movement. The carbon fiber maintains its vertical stability through the slot 451 on the guide ring 45, while the photosensitive resin enters the fixing slot 51 on the winding plate 5 through the slot 451 and connects with the winding plate 5. The photosensitive resin feeding wheel 34 rotates, thereby driving the transmission shaft 41 to rotate synchronously. The transmission shaft 41 then drives the transmission wheel 42 to rotate synchronously. During the rotation of the transmission wheel 42, it meshes with the drive wheel 43, driving the drive wheel 43 to rotate. When the wheel 43 rotates, it drives the winding plate 5 and the bundle tube 44 to rotate synchronously. The winding plate 5 drives the photosensitive resin in the fixing groove 51 to rotate around the carbon fiber as the axis, thereby causing the photosensitive resin to wind onto the carbon fiber. After the photosensitive resin and carbon fiber are wound, the photosensitive resin and carbon fiber enter the bundle tube 44. The bundle tube 44 guides the movement of the carbon fiber and photosensitive resin, while preventing the wound photosensitive resin and carbon fiber from loosening. At the same time, the fastening protrusion 441 in the bundle tube 44 and the photosensitive resin wound on the carbon fiber enhance the squeezing force on the photosensitive resin, thereby making the photosensitive resin and carbon fiber more tightly bonded and preventing the photosensitive resin and carbon fiber from loosening. Preferably, the winding plate 5 uses a photosensitive resin feeding wheel 34 as the driving source, which realizes the unification of the photosensitive resin feeding speed and the photosensitive resin winding speed. When the rotation speed of the photosensitive resin feeding wheel 34 increases, the feeding speed of the photosensitive resin is increased, and the rotation speed of the winding plate 5 also increases synchronously, increasing the winding speed of the photosensitive resin, so that the feeding speed of the photosensitive resin always remains consistent with the winding speed.

[0028] In this embodiment, the slot 451 is a chain-shaped circular structure 4511, which corresponds to the fixing slot 51; Specifically, the chain-like circular structure of the slot 451 is composed of three circular structures. The central circular structure is used to pass through the carbon fiber, thus ensuring that the carbon fiber is always on the central axis, which facilitates the winding of the photosensitive resin. The circular structures on both sides are used to fix the photosensitive resin, so that the photosensitive resin is always on the outer circumference of the carbon fiber. At the same time, the slot 451 plays a guiding role. When the carbon fiber and photosensitive resin pass through the guide ring 45 and enter the extruder 2 for the first time, the guide ring 45 can be manually rotated first. The position of the winding plate 5 can be observed through the slot 451 on the guide ring 45, so that any one of the circular structures at both ends of the chain-like circular structure 4511 is aligned with the fixing groove 51 on the winding plate 5, so that the photosensitive resin enters the fixing groove 51 through the slot 451 and connects with the winding plate 5.

[0029] In this embodiment, a guide surface 511 is provided on the fixing groove 51; Specifically, the guide plate is used to guide the entry of the photosensitive resin, so that the photosensitive resin can smoothly enter the fixing groove 51 and connect with the winding plate 5, thereby reducing the time for the photosensitive resin to smoothly pass through the fixing groove 51 and improving the preparation efficiency.

[0030] In this embodiment, the mixing component 6 includes a reversing wheel 61, a fixed shaft 62, a driven wheel 63, a rotating drum 64, and a drive plate 65. The reversing wheel 61 meshes with the collecting cylinder 44, and is rotatably mounted in the extruder 2 via the fixed shaft 62. The driven wheel 63 is located below the reversing wheel 61. The driven wheel 63 is fixedly mounted to the rotating drum 64. The rotating drum 64 is rotatably mounted to the heating block 22, and a sliding cavity 641 is formed on the rotating drum 64. A mixing cylinder 7 is slidably installed inside the heating block 22. The mixing cylinder 7 is divided into a driving section 71 and a mixing section 72. The driving section 71 is located above the heating block 22 and has a reciprocating groove 711. The mixing section 72 is located inside the heating block 22 and has a linear array of mixing protrusions 721. The driving plate 65 is rotatably connected to the fixed shaft 62 via a bearing, and the driving plate 65 has a driving block 651 that cooperates with the reciprocating groove 711. Specifically, during the synchronous rotation of the bundled tube 44 following the drive wheel 43, the bevel gear teeth at the lower end of the bundled tube 44 mesh with the reversing wheel 61, thereby driving the reversing wheel 61 to rotate. The reversing wheel 61 maintains stable rotation under the action of the fixed shaft 62. The reversing wheel 61 then meshes with the driven wheel 63, which drives the rotating tube 64 to rotate synchronously. The reversing wheel 61 drives the driven wheel 63 to mesh with the bundled tube 44, causing the rotating tube 64 to rotate in the opposite direction to the bundled tube 44. During the rotation of the rotating tube 64, it drives the mixing tube 7 to rotate synchronously. The mixing tube 7, through the mixing protrusion 721, agitates the melted photosensitive resin and carbon fiber, ensuring uniform mixing. Simultaneously, the opposite rotation of the rotating tube 64 and the bundled tube 44 further enhances the mixing effect because inertial forces are generated during the winding process. When the inertial force is transmitted to the melting section, it will cause the solution of photosensitive resin and carbon fiber to have a certain swirling flow tendency. The rotation direction of the rotating drum 64 is opposite to that of the bundling drum 44, thus generating a force with opposite swirling direction. The collision of the two forces with different swirling directions will enhance the turbulence in the melting section, thereby enhancing the uniform mixing of photosensitive resin and carbon fiber. At the same time, as the mixing drum 7 rotates synchronously with the rotating drum 64, the reciprocating groove 711 on the mixing drum 7 and the driving block 651 on the driving plate 65 squeeze each other. Under the action of the driving block 651, the mixing drum 7 moves up and down reciprocatingly, thereby enhancing the mixing efficiency of the molten liquid and ensuring the uniform mixing of photosensitive resin and carbon fiber. Meanwhile, since the driving plate 65 is connected to the fixed shaft 62 through the bearing, the driving plate 65 will not rotate.

[0031] In this embodiment, the rotating drum 64 is provided with a spiral drainage groove 642, and the spiral drainage groove 642 rotates in the same direction as the rotating drum 64. Specifically, the spiral guide groove 642 guides the molten photosensitive resin and carbon fiber, causing the solution to move in a spiral motion, thereby promoting the uniform mixing of the two. During the rotation of the rotating drum 64, the solution inside the rotating drum 64 rotates synchronously, and the solution inside the rotating drum 64 generates a certain centripetal force, which promotes the centripetal movement of the photosensitive resin on the outer side and mixes with the carbon fiber on the middle line, thereby promoting the uniform mixing of the two. At the same time, since the spiral guide groove and the rotating drum 64 rotate in the same direction, the spiral rotation of the solution is guided, which further promotes the generation of centripetal force and enhances the mixing effect of photosensitive resin and carbon fiber.

[0032] In this embodiment, the hybrid bump 721 is generally in the shape of an inverted frustum 722, and the inverted frustum 722 cooperates with the spiral drainage groove 642. Specifically, the length of the mixing bump 721 gradually increases from top to bottom, thus forming a frustum-shaped structure. This frustum-shaped structure is similar to the shape of the solution rotation caused by the centripetal force generated when the spiral channel 642 and the rotating cylinder 64 rotate. For example, when water is in a cup, if the cup is rotated quickly, the water inside the cup will rotate under the action of centripetal force. At this time, the water in the upper layer is close to the cup wall, and the water in the lower layer is close to the center, forming a shape similar to a frustum-shaped structure. The frustum-shaped structure enhances the contact efficiency between the mixing bump 721 and the molten liquid, reducing energy consumption while ensuring the mixing efficiency of the mixing bump 721 for the molten liquid of photosensitive resin and carbon fiber, and ensuring the uniform mixing of photosensitive resin and carbon fiber.

[0033] In this embodiment, the hybrid bump 721 is a rhomboid structure 7211, and the hybrid bump 721 is arranged in an alternating pattern. Specifically, the rhomboid structure 7211 of the mixing bump 721 enhances the force on the molten liquid through the multi-angle reinforcement of its edges. During the rotation and reciprocating motion of the mixing bump 721, the edges enhance the disturbance of the molten liquid, thereby enhancing the uniform mixing of photosensitive resin and carbon fiber. The staggered arrangement of the mixing bump 721 reduces the number of mixing bumps 721, ensuring the mixing efficiency of the mixing bump 721 on the molten liquid and avoiding waste of resources. At the same time, it avoids the problem of excessive resistance when the mixing cylinder 7 moves upward due to too many mixing bumps 721, which would lead to increased energy consumption, thus improving the mixing efficiency.

[0034] In the 3D printing equipment for preparing carbon fiber composite materials according to the present invention, the guide ring 45 is first rotated to align the slot 451 on the guide ring 45 with the fixing slot 51 on the winding plate 5. Then, the photosensitive resin and carbon fiber are passed through the feeding device 3 and then through the guide slot into the extrusion head 2. The photosensitive resin is connected to the winding plate 5 through the fixing slot 51. Then, the feeding device 3 and the extrusion head 2 are started, and the 3D printer 1 begins trial operation to ensure that the 3D printer 1 can work normally and that the extrusion head 2 is not blocked. At this time, the photosensitive resin is not fixed to one end of the carbon fiber, and the photosensitive resin cannot be wound onto the carbon fiber. When the operator finds that carbon fiber composite material has begun to be extruded during the trial operation, the operator stops the trial operation. At this time, the photosensitive resin and one end of the carbon fiber melt and bond together under the action of the heating block 22. 3D printer 1 begins operation to prepare carbon fiber composite materials. Drive motor 31 starts, driving the drive wheel 32, which is fixedly connected to it, to rotate synchronously. The rotation of drive wheel 32 drives the carbon fiber feeding wheel 33 and the photosensitive resin feeding wheel 34 to rotate synchronously for feeding. During the rotation of photosensitive resin feeding wheel 34, it drives the transmission shaft 41 to rotate synchronously. The transmission shaft 41 drives the transmission wheel 42 to rotate synchronously. During the rotation of transmission wheel 42, it meshes with the drive wheel 43, driving the drive wheel 43 to rotate. The rotation of the drive wheel 43 drives the winding plate 5 and the bundled cylinder 44 to rotate synchronously. The winding plate 5 causes the photosensitive resin in the fixing groove 51 to rotate around the carbon fiber as the axis, thus winding the photosensitive resin around the carbon fiber. When the bundled cylinder 44 rotates, it drives the fastening protrusions to rotate synchronously to fasten the photosensitive resin and carbon fiber bundles. At the same time, the bevel gear teeth at the bottom of the bundled cylinder 44 mesh with the reversing wheel 61, causing the reversing wheel 61 to rotate. Under the action of the fixed shaft 62, the reversing wheel 61 ensures its own stable rotation and meshes with the driven wheel 63 to drive the driven wheel 63 to rotate. The driven wheel 63 drives the rotating cylinder 64 to rotate synchronously, and the rotating cylinder 64 drives the mixing cylinder 7 to rotate synchronously. During the rotation of the mixing cylinder 7, the reciprocating groove 711 on the mixing cylinder 7 is squeezed against the driving block 651 on the driving plate 65. Under the action of the driving block 651, the mixing cylinder 7 moves up and down reciprocatingly. The mixing cylinder 7 then drives the mixing protrusions 721 on it to move synchronously to mix the molten photosensitive resin and carbon fiber.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printing apparatus for manufacturing a carbon fiber composite material, characterized by: The application relates to a 3D printer, which comprises an extrusion head (2), a feeding device (3), a winding assembly (4), a winding plate (5), a mixing assembly (6) and a mixing cylinder (7). The 3D printer (1) is slidably provided with the extrusion head (2). The extrusion head (2) is provided with a feeding port (21), and a heating block (22) and a nozzle (23) are arranged in the extrusion head (2); the nozzle (23) is rotatably arranged on the heating block (22); the feeding port (21) and the nozzle (23) are located on the same central axis; and the feeding device (3) is arranged on the extrusion head (2). The feeding device (3) is used for proportionally feeding carbon fibers and photosensitive resin; and the winding assembly (4) is arranged below the feeding device (3). The winding assembly (4) is arranged in the extrusion head (2) and located between the feeding port (21) and the nozzle (23); the winding assembly (4) is provided with the winding plate (5); and the feeding device (3) drives the winding plate (5) to rotate through the winding assembly (4) to realize winding of the carbon fibers and the photosensitive resin when the 3D printer (1) works. The mixing assembly (6) is rotatably arranged in the heating block (22); the mixing assembly (6) is provided with the mixing cylinder (7); and the winding assembly (4) drives the mixing cylinder (7) to displace at multiple angles through the mixing assembly (6) when the 3D printer (1) works.

2. The apparatus of claim 1, wherein: The feeding device (3) comprises a driving motor (31), a driving wheel (32), a carbon fiber feeding wheel (33), a photosensitive resin feeding wheel (34) and an auxiliary wheel (35). The driving motor (31) is fixedly arranged on the extrusion head (2); and the driving wheel (32) is fixedly arranged on the driving motor (31). The driving wheel (32) is rotatably arranged on the extrusion head (2); the carbon fiber feeding wheel (33) and the photosensitive resin feeding wheel (34) are arranged on the two sides of the driving wheel (32) respectively. The diameter of the carbon fiber feeding wheel (33) is larger than that of the photosensitive resin feeding wheel (34); and the auxiliary wheel (35) is arranged on one side of the carbon fiber feeding wheel (33) and the photosensitive resin feeding wheel (34) respectively. The auxiliary wheel (35) is rotatably arranged on the extrusion head (2).

3. The apparatus of claim 2, wherein: The winding assembly (4) comprises a transmission shaft (41), a transmission wheel (42), a driving wheel (43), a bundling cylinder (44) and a guide ring (45). The transmission shaft (41) is fixedly arranged on the photosensitive resin feeding wheel (34); and the transmission wheel (42) is fixedly arranged on the transmission shaft (41). The driving wheel (43) is arranged on one side of the transmission wheel (42). The driving wheel (43) is rotatably arranged on the inner wall of the extrusion head (2); and the bundling cylinder (44) is fixedly arranged below the driving wheel (43). The bundling cylinder (44) is provided with bevel gear teeth below; and the bundling cylinder (44) is provided with a fastening protrusion (441) inside. The winding plate (5) is arranged in the driving wheel (43); and the hemispherical fixing groove (51) is arranged on the winding plate (5). A guide ring (45) is arranged above the gathering cylinder (44), and a clamping groove (451) is arranged on the guide ring (45), and the guide ring (45) is rotatably arranged in the feeding port (21).

4. The apparatus of claim 3, wherein: The clamping groove (451) is a chain-shaped circular structure (4511), and the chain-shaped circular structure (4511) corresponds to the fixing groove (51).

5. The apparatus of claim 4, wherein: A guide surface (511) is arranged on the fixing groove (51).

6. The apparatus of claim 3, wherein: The mixing assembly (6) comprises a reversing wheel (61), a fixed shaft (62), a driven wheel (63), a rotating drum (64) and a driving plate (65). The reversing wheel (61) is engaged with the gathering cylinder (44), the reversing wheel (61) is rotatably arranged in the extrusion head (2) through the fixed shaft (62), and the driven wheel (63) is arranged below the reversing wheel (61). The driven wheel (63) is fixedly arranged with the rotating drum (64). The rotating drum (64) is rotatably arranged with the heating block (22), and a sliding cavity (641) is arranged on the rotating drum (64), and the mixing cylinder (7) is slidably arranged in the sliding cavity (641). The mixing cylinder (7) is divided into a driving section (71) and a mixing section (72), the driving section (71) is arranged above the heating block (22), and a reciprocating sliding groove (711) is arranged on the driving section (71); the mixing section (72) is arranged in the heating block (22), and a plurality of mixing protrusions (721) are linearly arranged on the mixing section (72). The driving plate (65) is rotatably connected with the fixed shaft (62) through a bearing, and a driving block (651) is arranged on the driving plate (65) and matched with the reciprocating sliding groove (711).

7. The apparatus of claim 6, wherein: The rotating drum (64) is provided with a spiral drainage groove (642), and the spiral drainage groove (642) has the same rotation direction as the rotating drum (64).

8. The apparatus of claim 6, wherein: The mixing protrusion (721) is in the form of an inverted circular truncated cone structure (722), and the inverted circular truncated cone structure (722) is matched with the spiral drainage groove (642).

9. The apparatus of claim 8, wherein: The mixing protrusion (721) is in the form of a rhombus structure (7211), and the mixing protrusions (721) are arranged in an up-and-down staggered manner.

10. A method for manufacturing a carbon fiber composite material for use in the 3D printing apparatus according to any one of claims 1 to 9, characterized by, The method comprises the following steps: Step 1, adjusting the position of the winding assembly (4) to facilitate the entry of the photosensitive resin and the carbon fiber; Step 2, feeding the photosensitive resin and the carbon fiber into the extrusion head (2) through the feeding device (3); Step 3, the winding assembly (4) drives the winding plate (5) to wind the photosensitive resin onto the carbon fiber; Step 4, the wound carbon fiber is sent to the heating block (22) area; Step 5, the mixing assembly (6) drives the mixing cylinder (7) to uniformly mix the molten liquid; Step 6, the mixed molten liquid is extruded from the nozzle (23) to form a carbon fiber composite material.

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