A nozzle suitable for additive manufacturing of continuous fiber reinforced composite materials

Abstract

This invention relates to the field of additive manufacturing technology and discloses a nozzle suitable for additive manufacturing of continuous fiber reinforced composite materials. The nozzle includes a main body and a stirring mechanism installed at the bottom of the main body. During operation, the stirring mechanism reduces the risk of material carbonization due to excessively high nozzle temperature. In this invention, the openings of the rotating plate and the stirring plate are staggered, causing softened material to accumulate on the top of the stirring plate. When the accumulated material exceeds the unopened portion of the stirring plate, it pushes the mixing plate to rotate. This rotation mixes the internal and external materials, reducing nozzle clogging caused by overheating and material carbonization during prolonged operation of the additive manufacturing machine. This improves the smoothness of material output from the nozzle during additive manufacturing.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, specifically to a nozzle suitable for additive manufacturing of continuous fiber reinforced composite materials. Background Technology

[0002] The continuous fiber reinforced composite material additive manufacturing nozzle is a core component in the additive manufacturing field. Its technical level directly determines the molding accuracy and processing efficiency of composite materials. Its technological iteration and innovation promote the development of lightweight intelligent manufacturing in high-end equipment, aerospace and other fields, help the manufacturing industry upgrade to precision and green, and lay a solid hardware foundation for the industrialization and popularization of composite material additive manufacturing.

[0003] Typical additive manufacturing nozzles use external heating rods to heat and soften the material inside the nozzle. The softened material is then extruded from the nozzle under the pressure of the unsoftened material conveyed by the extruder, thus completing the additive manufacturing process. Since the material softens through heat conduction from the nozzle, when the additive manufacturing machine operates for a long time, the high temperature of the nozzle can easily cause carbonization of the material inside the nozzle that is in contact with the inner wall of the nozzle, which may lead to nozzle blockage and ultimately reduce the smoothness of material output during the additive manufacturing process. Summary of the Invention

[0004] The purpose of this invention is to provide a nozzle suitable for additive manufacturing of continuous fiber reinforced composite materials, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a nozzle suitable for additive manufacturing of continuous fiber reinforced composite materials, comprising a main body and further comprising:

[0007] The mixing mechanism is installed at the bottom of the main body. When the mixing mechanism is in operation, it can reduce the carbonization of materials caused by excessively high temperature of the nozzle.

[0008] The limiting mechanism is installed at the bottom of the mixing mechanism. The operation of the limiting mechanism can reduce the deviation of the mixing mechanism during operation.

[0009] Furthermore, the main body includes:

[0010] The heating component is located at the bottom of the main body. The operation of the heating component can heat and soften the material.

[0011] The nozzle assembly is located inside the heating assembly.

[0012] Furthermore, the stirring mechanism includes:

[0013] A rotating component is located inside the nozzle assembly, and the movement of the nozzle assembly can agitate the material inside the nozzle assembly.

[0014] A refracting component is located at the bottom of the rotating component.

[0015] Furthermore, the restricted entities include:

[0016] A blocking component is located on top of the rotating component. The operation of the blocking component can reduce the occurrence of asynchrony during the movement of the rotating component.

[0017] The sustaining component is located inside the folding component.

[0018] Furthermore, the heating assembly includes a conductive block fixedly connected to the bottom of the main body, and a heating block is fixedly connected inside the conductive block.

[0019] Furthermore, the nozzle assembly includes a nozzle that is fixedly connected inside the conductive block;

[0020] The nozzle has a parts slot inside;

[0021] The part slot is fixedly connected with a blocking block.

[0022] Furthermore, the rotating assembly includes two rotating plates rotatably connected inside the parts slot, the two rotating plates being symmetrically distributed with respect to the nozzle as the center;

[0023] The rotating plate is fixedly connected to a connecting rod, and the top of the two connecting rods is fixedly connected to a spring plate.

[0024] The bottom of the elastic plate is equipped with a sliding plate, which is slidably connected to the inside of the parts groove;

[0025] The sliding plate causes the top to contact the bottom of the connecting rod, and the rotating plate is initially set in a cross configuration.

[0026] Furthermore, the refracting component includes four gear plates slidably connected to the bottom of the sliding plate, with the four gear plates arranged in pairs and symmetrically distributed around the sliding plate as the center;

[0027] Two gears are installed between each pair of gear plates, and the two gears mesh with the two gear plates respectively;

[0028] Two rotating rods are provided between the two sets of gears. The rotating rods are symmetrically distributed around the sliding plate, and the two ends of the two rotating rods are fixedly connected to the side walls of different sets of gears.

[0029] A stirring plate is fixedly connected to the outer surface of the rotating rod;

[0030] Among them, a spring is fixedly connected to the bottom of the gear plate, and the end of the spring away from the gear plate is fixedly connected to the bottom inner wall of the part slot. The initial state of the agitator is vertical.

[0031] Furthermore, the blocking assembly includes two push plates slidably connected to the top of the sliding plate, the two push plates being symmetrically distributed with respect to the nozzle;

[0032] A limiting plate is provided on the top of the push plate, and the limiting plate is slidably connected to the inner wall of the parts slot;

[0033] The bottom of the limiting plate has four sliding connection to push blocks, which are symmetrically distributed around the nozzle.

[0034] A jacking block is set between each group of pushing blocks, and the side wall of the jacking block is in contact with the side wall of the pushing block.

[0035] The top of the limiting plate is fixedly connected to four springs, which are distributed circumferentially around the push plate. The end of the spring away from the push block is fixedly connected to the inner wall of the top of the part slot.

[0036] Furthermore, the maintaining component includes a mixing plate rotatably connected inside the agitator plate, and an actuating block is provided on the top of the mixing plate, the actuating block being slidably connected to the interior of the agitator plate;

[0037] The bottom of the starting block is rotatably connected to two driving rods, which are symmetrically distributed around the stirring plate.

[0038] A limiting block is used to rotatably connect the two rotating rods;

[0039] The mixing plate has two counterweights that slide inside it, and the two counterweights are equidistant from the mixing plate. The bottom of the starting block is fixedly connected to two springs.

[0040] The present invention has the following beneficial effects:

[0041] 1. In this invention, the mixing plate inside the agitator rotates under the influence of gravity until it is perpendicular to the ground. At this point, the softened material flowing down from the top rotating plate comes into contact with the agitator. Since the openings of the rotating plate and the agitator are staggered, the softened material accumulates on the top of the agitator. When the accumulated material exceeds the unopened position of the agitator, it pushes the mixing plate to rotate. The rotation of the mixing plate mixes the internal material with the external material, thereby reducing the nozzle blockage caused by overheating and carbonization of the material during long-term operation of the additive manufacturing machine, thus improving the smoothness of material output from the nozzle in additive manufacturing.

[0042] 2. In this invention, when the push plate moves to the upper part of the part slot, it will contact the blocking block set inside the part slot. The two push plates will approach each other under the action of the blocking block and exert a squeezing force on the two connecting rods. The two connecting rods are pushed by both sides and rotate around the center point of the connecting rods under the limitation of the elastic plate. At this time, the elastic plate will produce a certain deformation. The rotation of the connecting rods will drive the rotating plate to rotate. The rotation of the rotating plate will cause the two rotating plates to approach each other until the inclined surface at the bottom forms a V shape. At this time, the material driven by the reverse rotation of the external extruder will be cut by the V-shaped setting at the bottom of the rotating plate and the bottom of the stirring plate, thereby reducing the probability that the nozzle cannot retract normally due to being blocked by the rotating plate during material retraction, thereby improving the continuity of the additive manufacturing machine during material retraction.

[0043] 3. In this invention, the pressing of the connecting rod by the pushing plate causes the rotating plates to move closer to each other around the center line of the jacking block, thereby reducing the possibility of the rotating plates shifting and rotating when they move closer together. When the rotating plate slides downward, the limiting plate will be pushed tightly against the pushing plate by the second spring at the top. At the same time, the bottom of the limiting plate will push the pushing block and the jacking block to be tightly against the elastic plate, thereby reducing the phenomenon of the rotating plate rotating randomly around the connecting rod when the softened material enters, and improving the stability of the rotating plate's movement state during the material feeding and unfeeding process.

[0044] 4. In this invention, when the material exerts a pushing force on the mixing plate, the mixing plate can rotate around its axis. The rotation of the mixing plate will drive the internal counterweight to move synchronously. When the impact force of the material decreases, the mixing plate will remain perpendicular to the ground under the influence of the weight of the counterweight. When the stirring plate resets, the pressure on the inner wall of the part slot of the starting block disappears, and the spring will push the limiting block back to its original position through the driving rod. At the same time, the mixing plate will remain perpendicular to the ground under the influence of the counterweight, and the mixing plate will be locked into the bottom of the limiting block again. This reduces the situation where the mixing plate cannot be perpendicular to the ground when resetting under the influence of softened material, which would otherwise block the material ejection. This improves the accuracy of the position of the mixing plate during the material ejection process in additive manufacturing.

[0045] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0048] Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0049] Figure 3 For the present invention Figure 2 Enlarged diagram of A in the middle;

[0050] Figure 4 This is a schematic diagram of the rotating component of the present invention;

[0051] Figure 5 This is a partial schematic diagram of the rotating component of the present invention;

[0052] Figure 6 This is a schematic diagram of the blocking component of the present invention;

[0053] Figure 7 This is an exploded view of the refractive component of the present invention;

[0054] Figure 8 This is a schematic diagram of the component used in this invention.

[0055] The attached diagram lists the components represented by each number as follows:

[0056] In the diagram: 1. Main body; 11. Heating assembly; 111. Conducting block; 112. Heating block; 12. Nozzle assembly; 121. Nozzle; 122. Parts slot; 2. Stirring mechanism; 21. Rotating assembly; 211. Rotating plate; 212. Connecting rod; 213. Elastic plate; 214. Sliding plate; 22. Deflecting assembly; 221. Gear plate; 222. Gear; 223. Rotating rod; 224. Stirring plate; 3. Limiting mechanism; 31. Blocking assembly; 311. Pushing plate; 312. Limiting plate; 313. Pushing block; 314. Pushing block; 32. Maintaining assembly; 321. Mixing plate; 322. Starting block; 323. Driving rod; 324. Limiting block. Detailed Implementation

[0057] 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.

[0058] Please see Figure 1 - Figure 8 As shown, the present invention is a nozzle suitable for additive manufacturing of continuous fiber reinforced composite materials, comprising a main body 1, and further comprising:

[0059] The stirring mechanism 2 is installed at the bottom of the main body 1. When the stirring mechanism 2 is in operation, it can reduce the situation where the material is carbonized due to excessively high temperature of the nozzle.

[0060] The limiting mechanism 3 is installed at the bottom of the stirring mechanism 2. The operation of the limiting mechanism 3 can reduce the deviation of the stirring mechanism 2 during operation.

[0061] Entity 1 includes:

[0062] Heating component 11 is located at the bottom of the main body 1. The operation of heating component 11 can heat and soften the material.

[0063] Nozzle assembly 12 is disposed inside heating assembly 11.

[0064] The stirring mechanism 2 includes:

[0065] Rotating component 21 is disposed inside nozzle assembly 12, and the movement of nozzle assembly 12 can stir the material inside nozzle assembly 12;

[0066] The refracting component 22 is located at the bottom of the rotating component 21.

[0067] Restricted agency 3 includes:

[0068] The blocking component 31 is disposed on the top of the rotating component 21. The operation of the blocking component 31 can reduce the situation of asynchronous movement of the rotating component 21.

[0069] The maintaining component 32 is located inside the folding component 22.

[0070] The heating component 11 includes a conductive block 111 fixedly connected to the bottom of the main body 1. A heating block 112 is fixedly connected inside the conductive block 111. When the heating block 112 is powered on, it will heat the conductive block 111. The conductive block 111 will conduct heat to the inside of the nozzle 121. When the temperature of the nozzle 121 reaches the rated temperature...

[0071] The nozzle assembly 12 includes a nozzle 121 fixedly connected inside the conductive block 111;

[0072] The nozzle 121 has a parts slot 122 inside;

[0073] The parts groove 122 is fixedly connected to a blocking block. When the material is transported to the nozzle 121 by the externally installed extruder, it will be softened into a thick liquid state by the high temperature inside the nozzle 121. The softened material will be squeezed by the material behind and squeezed out from the outlet of the nozzle 121.

[0074] The rotating assembly 21 includes two rotating plates 211 rotatably connected inside the parts slot 122, and the two rotating plates 211 are symmetrically distributed with the nozzle 121 as the center.

[0075] A connecting rod 212 is fixedly connected inside the rotating plate 211, and an elastic plate 213 is fixedly connected to the top of the two connecting rods 212;

[0076] The bottom of the elastic plate 213 is provided with a sliding plate 214, which is slidably connected to the inside of the parts groove 122;

[0077] The sliding plate 214 drives the top to contact the bottom of the connecting rod 212. The rotating plate 211 is initially arranged in a cross configuration. When too much material accumulates on the top of the rotating plate 211, it will generate a downward pushing force on the rotating plate 211. When the rotating plate 211 slides down, it will drive the sliding plate 214 to slide down through the connecting rod 212. The movement of the sliding plate 214 drives the gear plate 221 to move down.

[0078] The folding component 22 includes four gear plates 221 slidably connected to the bottom of the sliding plate 214. The four gear plates 221 are arranged in pairs and symmetrically distributed with the sliding plate 214 as the center.

[0079] Two gears 222 are provided between the two gear plates 221 in each group, and the two gears 222 mesh with the two gear plates 221 respectively;

[0080] Two rotating rods 223 are provided between the two sets of gears 222. The rotating rods 223 are symmetrically distributed with the sliding plate 214 as the center. The two ends of the two rotating rods 223 are fixedly connected to the side walls of different sets of gears 222 respectively.

[0081] A stirring plate 224 is fixedly connected to the outer surface of the rotating rod 223;

[0082] Among them, a spring is fixedly connected to the bottom of the gear plate 221. The end of the spring away from the gear plate 221 is fixedly connected to the bottom inner wall of the part groove 122. The initial state of the stirring plate 224 is vertical. When the pressure of the top sliding plate 214 on the gear plate 221 disappears, the spring will push the gear plate 221 back to its original position. At this time, the stirring plate 224 will return to its initial position under the rotation of the gear 222. At the same time, the top rotating plate 211 is still driven by the movement of the material. The movement of the rotating plate 211 will drive the top push plate 311 to move synchronously.

[0083] The blocking assembly 31 includes two push plates 311 slidably connected to the top of the sliding plate 214, and the two push plates 311 are symmetrically distributed with respect to the nozzle 121;

[0084] A limiting plate 312 is provided on the top of the push plate 311, and the limiting plate 312 is slidably connected to the inner wall of the part groove 122;

[0085] The bottom of the limiting plate 312 is slidably connected to four push blocks 313, which are symmetrically distributed around the nozzle 121.

[0086] A push block 314 is provided between each group of push blocks 313, and the side wall of the push block 314 contacts the side wall of the push block 313.

[0087] Four springs are fixedly connected to the top of the limiting plate 312. The four springs are distributed circumferentially around the push plate 311. The end of the spring away from the push block 313 is fixedly connected to the top inner wall of the part slot 122. When the push plate 311 slides towards the connecting rod 212, the two push plates 311 will first push the two push blocks 313 closer to each other. At this time, the push blocks 313 will push the top block 314 to slide downward and squeeze the circular area of ​​the elastic plate 213. At this time, the connecting rod 212 will rotate under the push of the top block 314, and the push plate 311 will squeeze the connecting rod 212.

[0088] The maintaining component 32 includes a mixing plate 321 rotatably connected inside the stirring plate 224, and a starting block 322 is provided on the top of the mixing plate 321. The starting block 322 is slidably connected to the inside of the stirring plate 224.

[0089] The bottom of the starting block 322 is rotatably connected to two driving rods 323, which are symmetrically distributed with the stirring plate 224 as the center.

[0090] A limiting block 324 is rotatably connected between the two rotating rods 223;

[0091] The mixing plate 321 has two counterweights slidably connected inside, and the two counterweights are equidistant from the mixing plate 321. The bottom of the starting block 322 is fixedly connected to two springs. When the material exerts a thrust on the mixing plate 321, the mixing plate 321 can rotate around the axis. The rotation of the mixing plate 321 will drive the internal counterweights to move synchronously. When the impact force of the material decreases, the mixing plate 321 will remain perpendicular to the ground under the influence of the weight of the counterweights.

[0092] In use, the operator first powers on the heating block 112, which heats the conductive block 111. The conductive block 111 then conducts the heat to the inside of the nozzle 121. Once the temperature of the nozzle 121 reaches the rated temperature, the operator starts the additive manufacturing equipment. When the material is transported into the nozzle 121 by the externally installed extruder, it is softened into a viscous liquid by the high temperature inside the nozzle 121. The softened material is then squeezed out from the outlet of the nozzle 121 by the material behind it, thus completing the additive manufacturing process.

[0093] When the softened material enters the nozzle 121, it first contacts the rotating plate 211. Due to the material's viscosity, excessive accumulation at the top of the rotating plate 211 creates a downward pushing force. As the rotating plate 211 slides downward, it drives the sliding plate 214 downward via the connecting rod 212. The movement of the sliding plate 214 causes the gear plate 221 to move downward, engaging and rotating the gear 222. The rotation of the gear 222, via the rotating rod 223, causes the stirring plates 224 to move away from each other. As the stirring plates 224 move away, the mixing plate 321 inside the stirring plate 224 will move away under the influence of gravity. The material rotates under the influence of the mixing plate 321 until it is perpendicular to the ground. At this time, the softened material flowing down from the top rotating plate 211 will come into contact with the stirring plate 224. Since the opening directions of the rotating plate 211 and the stirring plate 224 are staggered, the softened material will accumulate on the top of the stirring plate 224. When the accumulated material exceeds the position of the unopened part of the stirring plate 224, the material will push the mixing plate 321 to rotate. The rotation of the mixing plate 321 will mix the internal material with the external material, thereby reducing the nozzle blockage caused by the carbonization of the material due to overheating inside the nozzle 121 when the additive manufacturing machine is working for a long time, thus improving the smoothness of the nozzle output in additive manufacturing.

[0094] After additive manufacturing is completed, a material return process is performed. The material return process involves reheating the nozzle 121 to soften the internal material and bring it into contact with the unsoftened material. Then, heating is stopped. When the softened material cools to a specified temperature, the external extruder rotates in the reverse direction to carry out the material remaining inside the nozzle 121.

[0095] When the additive manufacturing process ends and the material is returned to its original position, the incompletely hardened material moves upward. This movement first causes the rotating plate 211 to move upward. At this time, the pressure on the bottom gear plate 221 from the top sliding plate 214 disappears, and the spring pushes the gear plate 221 back to its original position. The stirring plate 224 then returns to its initial position under the rotation of the gear 222. Simultaneously, the top rotating plate 211 is still being moved by the material. The movement of the rotating plate 211 causes the top pushing plate 311 to move synchronously. When the pushing plate 311 moves to a slightly upper position inside the part slot 122, it contacts the blocking block inside the part slot 122. The two pushing plates 311 move closer to each other under the action of the blocking block. The two connecting rods 212 are subjected to compressive force and are pushed by both sides. Under the limit of the elastic plate 213, they will rotate around the center point of the connecting rods 212. At this time, the elastic plate 213 will deform to a certain extent. The rotation of the connecting rods 212 will drive the rotating plate 211 to rotate. The rotation of the rotating plate 211 will cause the two rotating plates 211 to move closer to each other until the inclined surface at the bottom forms a V shape. At this time, the material driven by the reverse rotation of the external extruder will be cut by the V-shaped setting of the bottom of the rotating plate 211 and the bottom of the stirring plate 224, thereby reducing the probability that the nozzle cannot retract normally due to being blocked by the rotating plate 211 during material retraction, thus improving the continuity of the additive manufacturing machine during material retraction.

[0096] When the push plate 311 slides towards the connecting rod 212, the two push plates 311 will first push the two push blocks 313 closer to each other. At this time, the push blocks 313 will push the top block 314 to slide downward and squeeze the circular area of ​​the elastic plate 213. At this time, the connecting rod 212 will rotate under the push of the top block 314. The squeeze of the push plate 311 on the connecting rod 212 will cause the rotating plate 211 to move closer to each other with the top block 314 as the center line, thereby reducing the situation where the rotating plate 211 will deviate and rotate when it moves closer to each other. When the rotating plate 211 slides downward, the limiting plate 312 will be pushed by the top spring 2 to fit tightly against the push plate 311. At the same time, the bottom of the limiting plate 312 will push the push block 313 and the top block 314 to fit tightly against the elastic plate 213, thereby reducing the phenomenon that the rotating plate 211 will rotate randomly around the connecting rod 212 when the softened material enters, and improving the stability of the movement state of the rotating plate 211 during the material feeding and unloading process.

[0097] When the agitator plate 224 unfolds, the activating block 322 at the top of the agitator plate 224 contacts the inner wall of the nozzle 121 and slides inward under the pressure of the material at the top of the agitator plate 224. The sliding of the activating block 322 drives the limiting block 324 to move towards the top of the agitator plate 224 via the driving rod 323. At this time, the limiting block 324 moves away from the top of the mixing plate 321. After the pressure at the top of the mixing plate 321 disappears, when the material exerts a pushing force on the mixing plate 321, the mixing plate 321 can rotate around its axis. The rotation of the mixing plate 321 will drive the internal counterweight to move synchronously. When the impact force of the material decreases... The mixing plate 321 will remain perpendicular to the ground under the influence of the counterweight. When the stirring plate 224 is reset, the pressure on the inner wall of the part slot 122 of the starting block 322 will disappear. The spring will push the limiting block 324 back to its original position through the driving rod 323. At the same time, the mixing plate 321 will remain perpendicular to the ground under the influence of the counterweight. The mixing plate 321 will be locked into the bottom of the limiting block 324 again, thereby reducing the situation where the mixing plate 321 cannot be perpendicular to the ground when reset under the influence of softened material, which would lead to the material being blocked. This improves the accuracy of the position of the mixing plate 321 in the material ejection process of additive manufacturing.

[0098] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A nozzle suitable for additive manufacturing of continuous fiber reinforced composites, comprising a main body (1), characterized in that, Also includes: Stirring mechanism (2), stirring mechanism (2) is installed and arranged at the bottom of the main body (1), and the stirring mechanism (2) can reduce the carbonization of materials caused by the high temperature of the spray head when the stirring mechanism (2) is operated; Limiting mechanism (3), the limiting mechanism (3) is installed and arranged at the bottom of the stirring mechanism (2), and the operation of the limiting mechanism (3) can reduce the deviation of the stirring mechanism (2) when the stirring mechanism (2) is operated.

2. A nozzle suitable for additive manufacturing of continuous fiber-reinforced composites according to claim 1, characterized in that: The main body (1) comprises: Heating assembly (11), the heating assembly (11) is arranged at the bottom of the main body (1), and the operation of the heating assembly (11) can heat and soften the materials; Spray head assembly (12), the spray head assembly (12) is arranged inside the heating assembly (11).

3. A nozzle suitable for additive manufacturing of continuous fiber-reinforced composites according to claim 2, characterized in that: The stirring mechanism (2) comprises: Rotary assembly (21), the rotary assembly (21) is arranged inside the spray head assembly (12), and the movement of the spray head assembly (12) can stir the materials inside the spray head assembly (12); Folded component (22), the folded component (22) is arranged at the bottom of the rotary assembly (21).

4. A nozzle suitable for additive manufacturing of continuous fiber-reinforced composites according to claim 3, characterized in that: The limiting mechanism (3) comprises: Blocking assembly (31), the blocking assembly (31) is arranged at the top of the rotary assembly (21), and the operation of the blocking assembly (31) can reduce the out-of-sync condition of the rotary assembly (21) when the rotary assembly (21) is moving; Maintenance assembly (32), the maintenance assembly (32) is arranged inside the folded component (22).

5. A nozzle suitable for additive manufacturing of continuous fiber reinforced composites according to claim 4, characterized in that: The heating assembly (11) comprises a conduction block (111) fixedly connected to the bottom of the main body (1), and the conduction block (111) is fixedly connected with a heating block (112) inside.

6. A nozzle suitable for use in additive manufacturing of continuous fibre reinforced composites according to claim 5, characterised in that: The spray head assembly (12) comprises a spray head (121) fixedly connected inside the conduction block (111); A part slot (122) is formed in the inside of the spray head (121); The part slot (122) is fixedly connected with a blocking block inside.

7. A nozzle suitable for use in additive manufacturing of continuous fibre reinforced composites according to claim 6, characterised in that: The rotary assembly (21) comprises two rotary plates (211) rotatably connected inside the part slot (122), and the two rotary plates (211) are symmetrically distributed with the spray head (121) as the center; The rotary plate (211) is fixedly connected with a connecting rod (212) inside, and the top of the two connecting rods (212) is fixedly connected with an elastic plate (213); The bottom of the elastic plate (213) is provided with a sliding plate (214), and the sliding plate (214) is slidably connected with the inside of the part slot (122); The sliding plate (214) drives the bottom of the connecting rod (212) to contact.

8. A nozzle suitable for additive manufacturing of continuous fiber-reinforced composites according to claim 6, characterized in that: The folded component (22) comprises four gear plates (221) slidably connected at the bottom of the sliding plate (214), and the four gear plates (221) are symmetrically distributed with the sliding plate (214) as the center in two groups; Two gears (222) are arranged between each group of gear plates (221), and the two gears (222) are respectively engaged with the two gear plates (221); Two rotating rods (223) are arranged between the two groups of gears (222), the rotating rods (223) are centrally symmetrically distributed with the sliding plate (214) as the center, and two ends of the two rotating rods (223) are fixedly connected with the side walls of gears (222) of different groups respectively; The outer surface of the rotating rod (223) is fixedly connected with the stirring plate (224); Wherein, the bottom of the gear plate (221) is fixedly connected with spring one, and the end away from the gear plate (221) of the spring one is fixedly connected with the inner wall of the bottom of the part slot (122).

9. A nozzle suitable for use in additive manufacturing of continuous fiber reinforced composites according to claim 7, characterized in that: The blocking assembly (31) comprises two push plates (311) slidingly connected at the top of the sliding plate (214), and the two push plates (311) are symmetrically distributed with the spray head (121) as the center; The top of the push plate (311) is provided with a limiting plate (312), and the limiting plate (312) is slidingly connected with the inner wall of the part slot (122); The bottom of the limiting plate (312) is slidingly connected with four push blocks (313), and the four push blocks (313) are symmetrically distributed with the spray head (121) as the center; A top driving block (314) is arranged between each group of push blocks (313), and the side wall of the top driving block (314) is in contact with the side wall of the push block (313); Wherein, the top of the limiting plate (312) is fixedly connected with four springs two, and the four springs two are circumferentially distributed with the push plate (311) as the center, and the end away from the push block (313) of the spring two is fixedly connected with the top inner wall of the part slot (122).

10. A nozzle suitable for use in additive manufacturing of continuous fiber reinforced composites according to claim 8, characterized in that: The maintaining assembly (32) comprises a mixing plate (321) rotatably connected in the inside of the stirring plate (224), and the top of the mixing plate (321) is provided with a starting block (322), and the starting block (322) is slidingly connected with the inside of the stirring plate (224); The bottom of the starting block (322) is rotatably connected with two driving rods (323), and the two driving rods (323) are symmetrically distributed with the stirring plate (224) as the center; A limiting block (324) is rotatably connected between the two rotating rods (223); Wherein, the inside of the mixing plate (321) is slidingly connected with two counterweight blocks, the two counterweight blocks are equally distributed with the mixing plate (321), and the bottom of the starting block (322) is fixedly connected with two springs three.

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