Anti-clogging nozzle for 3D printer

Abstract

The present invention discloses an anti-clogging nozzle for a 3D printer, which relates to the field of 3D printing technology. The nozzle comprises a fixed frame, the fixed frame is fixedly connected to a fixed block, the fixed block is fixedly connected to a discharge shell, the fixed block is fixedly connected to a fixed cylinder, the fixed cylinder is sealingly and slidingly connected to a piston shaft, the fixed frame is fixedly connected to a first elastic push rod, the telescopic end of the first elastic push rod is fixedly connected to the piston shaft, the fixed frame is fixedly connected to a second elastic push rod, the fixed frame is fixedly connected to a first motor, the fixed frame is rotatably connected to a fan, the output shaft of the first motor is fixedly connected to a rotating table, the fan is splined to a rotating sleeve, and the telescopic end of the second elastic push rod is rotatably connected to the rotating sleeve. The present invention detects the temperature of the heating rod, changes the transmission ratio between the rotating table and the rotating sleeve, speeds up the rotation speed of the fan, and improves the heat dissipation rate of the fan to the heat exchange sleeve.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to an anti-clogging nozzle for a 3D printer. Background Art

[0002] A 3D printer is a device that can convert a digital model into a physical three-dimensional object. It constructs objects by stacking materials layer by layer and is widely used in many fields such as prototyping, product development, education, artistic creation, and medical treatment. Existing 3D printing technologies are mainly divided into fused deposition modeling, photo-curing stereolithography, and electron beam melting. Among them, fused deposition modeling is widely used mainly due to its low cost and ease of use. Its main method is to deliver thermoplastic material to the nozzle, so that the material is melted after being transported along the nozzle to the heating part, and then extruded layer by layer to form an object. The nozzle of an existing 3D printer is mainly composed of a heating element for melting the material, a temperature control element for controlling the heating temperature, and a heat dissipation element for preventing the material from melting prematurely. After the temperature control element is used for a long time under high temperature, it is very easy to have a problem of slow response speed, resulting in the heating element continuing to heat up after being heated to the required temperature, while the heat dissipation rate of the heat dissipation element on the nozzle remains unchanged, causing the heat dissipation element on the upper part of the nozzle to be unable to dissipate the temperature in time, resulting in the premature melting of the material in the nozzle that has not been transported to the heating part, and then blocking the nozzle. Summary of the invention

[0003] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides an anti-clogging nozzle for a 3D printer.

[0004] The technical implementation scheme of the present invention is: an anti-clogging nozzle for a 3D printer, comprising a fixed frame, the fixed frame is fixedly connected to a fixed block, the fixed block is fixedly connected to a discharge shell, the discharge shell is composed of a feed shell and a discharge head, the connection between the fixed block and the discharge shell is a discharge head, the fixed block is fixedly connected to a heating rod and a temperature control element, the fixed block is fixedly connected to a fixed cylinder, the fixed cylinder is sealingly and slidably connected to a piston shaft, and the two cooperate to form a first closed cavity, the first closed cavity is filled with thermal expansion gas, the fixed frame is fixedly connected to a first elastic push rod on one side close to the fixed cylinder, the telescopic end of the first elastic push rod is connected to the movable The plug shaft is fixed, a second elastic push rod is fixed to a side of the fixed frame away from the first elastic push rod, a first flow pipe is fixed between the fixed portion of the first elastic push rod and the fixed portion of the second elastic push rod and is connected thereto, a first motor is fixed to a side of the fixed frame close to the second elastic push rod, a fan is rotatably connected to a side of the fixed frame close to the second elastic push rod, a rotating table is fixed to an output shaft of the first motor, a rotating sleeve that fits the rotating table is splined to the fan, the telescopic end of the second elastic push rod is rotatably connected to the rotating sleeve, and a heat dissipation component for uniformly dissipating heat from the discharge shell is provided on the fixed frame.

[0005] As a preferred technical solution of the present invention, the heat dissipation component includes a second motor, the second motor is fixedly connected to the fixed frame, the output shaft of the second motor is fixedly connected to the first gear, the feed shell of the discharge shell is rotatably connected to a heat exchange sleeve, a linear array of heat sinks is arranged on the outside of the heat exchange sleeve, a second gear is fixedly connected to the top of the heat exchange sleeve, the first gear is meshed with the second gear, and a water injection component for accelerating the heat dissipation of the heat exchange sleeve is arranged in the fan.

[0006] As a preferred technical solution of the present invention, the cross-section of the external heat sink of the heat exchange jacket is in a transversely placed L-shape, so as to increase the heat dissipation area of ​​the heat exchange jacket.

[0007] As a preferred technical solution of the present invention, the water injection assembly includes a water injection pipe, which is rotatably connected to the rotating sleeve, a first channel connected to the water injection pipe is arranged inside the rotating sleeve, a second channel connected to the first channel is arranged inside the fan, a circular array of water outlet holes is arranged on the side of the fan away from the water injection pipe, the water outlet holes in the circular array are all connected to the second channel, and a sealing assembly for sealing the second channel is arranged inside the fan.

[0008] As a preferred technical solution of the present invention, the sealing assembly includes a push rod, which is fixed to the inside of the rotating sleeve through a connecting piece, and the push rod is located inside the second channel. A sealing block is slidably connected to the inside of the fan through a connecting piece, and a first elastic element is arranged between the sealing block and the connecting piece of the fan, and the sealing block is squeezed and matched with the push rod, and the sealing block is sealed and matched with the second channel.

[0009] As a preferred technical solution of the present invention, the blocking block is a truncated cone block, and the side of the blocking block with a smaller diameter is the side close to the rotating sleeve.

[0010] As a preferred technical solution of the present invention, it also includes an alarm component for reminding that the temperature of the heating rod rises. The alarm component is arranged on the side of the fixed frame close to the fixed cylinder. The alarm component includes a connecting frame. The connecting frame is rotatably connected to a rotating disk. The rotating disk is fixed with a ring-shaped array of reeds. The connecting frame is fixed with a bell. The reeds in the ring-shaped array cooperate with the bell in knocking. The rotating disk is provided with a connecting component for driving its own rotation through a connecting piece.

[0011] As a preferred technical solution of the present invention, the connecting component includes a rotating ring, which is fixedly connected to the rotating disk through a connecting piece, and the rotating ring is sealingly and rotatably connected to an outer ring, and the rotating ring and the outer ring cooperate to form a second closed cavity, a second flow tube is fixedly connected between the first flow tube and the outer ring, and the first flow tube is connected to the second closed cavity through the second flow tube, and a limiting component is provided on the rotating ring for docking itself with the first gear.

[0012] As a preferred technical solution of the present invention, the limit assembly includes a sliding cylinder, the sliding cylinder is fixedly connected to the inside of the rotating ring, the sliding cylinder is communicated with the second closed cavity, the sliding cylinder is sealed and slidably connected with a limit piston block inside, a second elastic element is arranged between the sliding cylinder and the limit piston block, and a ring-shaped array of limit blocks is fixedly connected to the first gear, and the limit blocks of the ring-shaped array are all limitedly matched with the limit piston block.

[0013] As a preferred technical solution of the present invention, the elastic coefficient of the second elastic element is greater than the elastic coefficient of the second elastic push rod.

[0014] The present invention has the following advantages: 1. The present invention detects the temperature of the heating rod, adjusts the fitting position of the rotating sleeve and the rotating table according to the temperature change, changes the transmission ratio between the rotating table and the rotating sleeve, speeds up the rotation speed of the fan, improves the heat dissipation rate of the heat exchange sleeve, avoids the material in the conveying shell on the discharge shell from melting due to high temperature, and then blocks the conveying of the material.

[0015] 2. The heat exchange jacket is driven to rotate by the second motor, so that the airflow blown by the fan is in uniform contact with the heat sink outside the heat exchange jacket, thereby increasing the heat exchange area of ​​the heat exchange jacket and improving the heat dissipation rate of the heat exchange jacket.

[0016] 3. Water is thrown out around the fan through the water outlet holes of the ring array, so that the wind flow generated by the fan drives the water flow to adhere to the outside of the heat exchange jacket, and the heat of the heat exchange jacket is absorbed by the vapor of the water, further improving the heat dissipation rate of the heat exchange jacket.

[0017] 4. By detecting the temperature of the heating rod, the rotating ring is connected to the first gear, which in turn drives the rotating disk to rotate, so that the rotating disk drives the reeds in the annular array to hit the bell and make a sound, so that the staff can perform an emergency shutdown to avoid the material being continuously transported after the discharge shell is blocked, resulting in material waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the heat exchange jacket and the fixing block of the present invention;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the rotating table and the rotating sleeve of the present invention;

[0021] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the fan and the rotating sleeve of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating disk and the reed of the present invention;

[0023] Figure 6 It is a schematic cross-sectional view of the three-dimensional structure of the rotating ring and the outer ring of the present invention.

[0024] The markings of the components in the accompanying drawings are as follows: 1: fixed frame, 2: fixed block, 3: discharge shell, 4: heating rod, 5: temperature control element, 6: fixed cylinder, 7: piston shaft, 8: first elastic push rod, 9: second elastic push rod, 10: first flow pipe, 11: first motor, 12: fan, 13: rotating table, 14: rotating sleeve, 201: second motor, 202: first gear, 203: heat exchange sleeve, 204: second gear, 301 : Water injection pipe, 302: first channel, 303: second channel, 304: water outlet, 305: push rod, 306: blocking block, 307: first elastic element, 401: connecting frame, 402: rotating disk, 403: reed, 404: bell, 405: rotating ring, 406: outer ring, 407: second flow pipe, 408: sliding cylinder, 409: limiting piston block, 410: second elastic element, 411: limiting block. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiment is only one of the better specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention without making any creative work should be covered within the protection scope of the present invention.

[0026] After being used for a long time at high temperature, the temperature control elements on the existing 3D printer nozzles are prone to slow response speed problems. As a result, the heating element continues to heat up after being heated to the required temperature, while the heat dissipation rate of the heat dissipation element on the nozzle remains unchanged, causing the heat dissipation element on the upper part of the nozzle to be unable to dissipate the temperature in time, causing the material in the nozzle that has not been delivered to the heating part to melt prematurely, thereby blocking the nozzle.

[0027] Embodiment 1: A 3D printer anti-clogging nozzle, such as Figure 1-Figure 4As shown, it includes a fixed frame 1, a fixed block 2 is fixedly connected to the lower part of the front side of the fixed frame 1, the fixed block 2 is fixedly connected to a discharge shell 3, the discharge shell 3 is composed of a feed shell located at the upper part and a discharge head at the lower part, the connection between the fixed block 2 and the discharge shell 3 is the discharge head, the fixed block 2 is fixedly connected to a heating rod 4 and a temperature control element 5, the heating rod 4 melts the material in the discharge head of the discharge shell 3 through the fixed block 2, a fixed cylinder 6 is fixedly connected to the right side of the fixed block 2, the internal sealing sliding connection of the fixed cylinder 6 is connected to a piston shaft 7, and the two cooperate to form a first closed cavity, the first closed cavity is filled with thermal expansion gas, the heating rod 4 is connected to the first closed cavity through the fixed block 2 The gas in a closed cavity transfers heat to expand the gas in the first closed cavity. A first elastic push rod 8 is fixedly connected to the right side of the fixed frame 1. The fixed part of the first elastic push rod 8 is filled with hydraulic oil. The telescopic end of the first elastic push rod 8 is fixedly connected to the piston shaft 7, so that the gas in the first closed cavity pushes the piston shaft 7 to slide outward along the fixed cylinder 6, so that the piston shaft 7 drives the telescopic end of the first elastic push rod 8 to slide along its fixed part. A second elastic push rod 9 is fixedly connected to the left side of the fixed frame 1. The fixed part of the second elastic push rod 9 is filled with hydraulic oil. The fixed part of the first elastic push rod 8 is fixedly connected to the fixed part of the second elastic push rod 9. A first circulation pipe 10 is connected, and the first circulation pipe 10 is filled with hydraulic oil, so that the hydraulic oil in the fixed part of the first elastic push rod 8 enters the fixed part of the second elastic push rod 9 along the first circulation pipe 10. A first motor 11 is fixedly connected to the left side of the fixed frame 1, and a fan 12 is rotatably connected to the left side of the fixed frame 1. The output shaft of the first motor 11 is fixedly connected to a rotating table 13. The rotating table 13 is truncated, and the end with a small diameter is located on the right side. The fan 12 is splined to a rotating sleeve 14, and the rotating table 13 is fitted with the rotating sleeve 14. The output shaft of the first motor 11 drives the fan 12 to rotate through the rotating table 13 and the rotating sleeve 14, so that the fan The fan 12 forms an airflow to blow toward the discharge shell 3 to prevent the material inside the discharge shell 3 from melting in the upper feed shell in advance. The telescopic end of the second elastic push rod 9 is rotatably connected with the rotating sleeve 14. The fixed frame 1 is provided with a heat dissipation component for dissipating heat from the discharge shell 3. The present invention detects the temperature of the heating rod 4, adjusts the fitting position of the rotating sleeve 14 and the rotating table 13 according to the temperature change, changes the transmission ratio between the rotating table 13 and the rotating sleeve 14, accelerates the rotation speed of the fan 12, and improves the heat dissipation rate of the discharge shell 3, thereby preventing the material in the feed shell on the discharge shell 3 from melting due to high temperature, thereby blocking the transportation of the material.

[0028] like Figure 1 and Figure 2As shown, the heat dissipation component includes a second motor 201, which is fixedly connected to the right side of the fixing frame 1, and the output shaft of the second motor 201 is fixedly connected to the first gear 202. The feed shell of the discharge shell 3 is rotatably connected to the heat exchange sleeve 203, and the outside of the heat exchange sleeve 203 is fixedly connected to a linear array of heat sinks for increasing the heat dissipation area of ​​the discharge shell 3. The cross-section of the heat sink outside the heat exchange sleeve 203 is in a horizontally placed L-shape, and the lower side is a plane for increasing the heat dissipation area of ​​the heat exchange sleeve 203. The top of the heat exchange sleeve 203 is fixedly connected to the second gear 204, and the first gear 202 is meshed with the second gear 204. The output shaft of the second motor 201 drives the heat exchange sleeve 203 to rotate through the first gear 202 and the second gear 204, so that the wind flow blown out by the fan 12 is evenly in contact with the heat sink outside the heat exchange sleeve 203, so that the heat dissipation of the discharge shell 3 is even, and a water injection component for accelerating the heat dissipation of the heat exchange sleeve 203 is provided in the fan 12.

[0029] like Figure 4 As shown, the water injection component includes a water injection pipe 301, which is connected to an external water injection device. The water injection pipe 301 is rotatably connected to the left side of the rotating sleeve 14. A first channel 302 connected to the water injection pipe 301 is provided inside the rotating sleeve 14, and a second channel 303 connected to the first channel 302 is provided inside the fan 12. Water in the water injection pipe 301 enters the second channel 303 along the first channel 302. A circular array of water outlet holes 304 is provided on the right side of the fan 12. The water outlet holes 304 in the circular array are all connected to the second channel 303, so that the water in the second channel 303 is discharged to the right side of the fan 12 along the water outlet holes 304 in the circular array. The fan 12 blows the water to the outside of the heat exchange sleeve 203. At this time, the water vaporizes and absorbs the heat of the heat exchange sleeve 203. At the same time, the annular groove on the external heat sink of the heat exchange sleeve 203 can store part of the water and make full use of the water. A blocking component for blocking the second channel 303 is provided inside the fan 12.

[0030] like Figure 4 As shown, the blocking assembly includes a push rod 305, which is fixed to the right side of the rotating sleeve 14 through a connecting piece, and the push rod 305 is located inside the second channel 303. A blocking block 306 is slidably connected to the fan 12 through a connecting piece. The blocking block 306 is a truncated cone block, and the side with a smaller diameter of the blocking block 306 is on the left side. A first elastic element 307 is arranged between the blocking block 306 and the connecting piece of the fan 12. The first elastic element 307 is a spring, and the first elastic element 307 is used to drive the blocking block 306 to reset. The blocking block 306 is squeezed and matched with the push rod 305, and the blocking block 306 is sealed and matched with the second channel 303. The push rod 305 pushes the blocking block 306 to separate from the fan 12, so that the water in the second channel 303 continues to flow.

[0031] When the 3D printer starts printing, the heating rod 4 is turned on for heating, the heating rod 4 heats the fixed block 2, and the fixed block 2 starts to heat the discharge head of the discharge shell 3. When the temperature control element 5 detects that the temperature of the fixed block 2 reaches the required requirement, the heating temperature of the heating rod 4 stabilizes to the required temperature, and then the staff continues to convey the material into the discharge shell 3. The material enters the discharge head at the bottom along the feed shell at the upper part of the discharge shell 3 and begins to melt. The molten material is pushed by the subsequent conveying material to be discharged from the discharge head at the bottom of the discharge shell 3 and printed according to a specific trajectory. Since the high temperature of the discharge head at the bottom of the discharge shell 3 will be transmitted upward to the upper feed shell, the temperature of the feed shell at the upper part of the discharge shell 3 will increase, causing the material inside to melt and then block the material. When the heating rod 4 is turned on, the first motor 11 is turned on, so that the output shaft of the first motor 11 drives the rotating table 13 thereon to rotate synchronously, and the rotating table 13 drives the rotating sleeve 14 to rotate synchronously, and the rotating sleeve 14 drives the fan 12 to rotate and blow out airflow to the heat exchange sleeve 203, so that the airflow takes away the heat of the heat exchange sleeve 203. When the heating rod 4 is turned on, the second motor 201 is turned on, and the output shaft of the second motor 201 drives the first gear 202 thereon to rotate, and the first gear 202 drives the heat exchange sleeve 203 to rotate synchronously through the second gear 204, so that the airflow blown by the fan 12 is evenly in contact with the heat exchange sleeve 203, thereby making the heat exchange sleeve 203 dissipate heat evenly, and this is done until printing is completed.

[0032] When printing is completed, the material conveying is turned off, and then the heating rod 4, the first motor 11 and the second motor 201 are turned off. When printing is required again, the above steps are repeated.

[0033] After long-term use, the temperature control element 5 responds slowly due to aging and other reasons, and is unable to timely feedback the heating temperature of the heating rod 4 and make corresponding adjustments, causing the heating rod 4 to continue to heat up and heat the fixed block 2. At this time, the temperature of the fixed block 2 is too high, causing the temperature of the discharge head of the discharge shell 3 to be transferred to the upper feed shell, causing the temperature of the feed shell to be too high, causing the material to melt in the discharge shell 3, thereby blocking the discharge shell 3. When the temperature of the fixed block 2 is too high, the temperature of the fixed block 2 is transferred to the first closed cavity formed by the fixed cylinder 6 and the piston shaft 7, causing the gas temperature in the first closed cavity to begin to rise. The temperature of the first closed cavity rises and begins to expand. At this time, the gas pushes The piston shaft 7 slides to the right, and the piston shaft 7 drives the telescopic end of the first elastic push rod 8 to slide along its fixed part. At this time, the hydraulic oil in the fixed part of the first elastic push rod 8 flows along the first flow pipe 10 to the fixed part of the second elastic push rod 9. The hydraulic oil in the fixed part of the second elastic push rod 9 pushes its telescopic end to move to the right. The telescopic end of the second elastic push rod 9 drives the rotating sleeve 14 to slide along the adjacent fan 12, changing the fitting position of the rotating sleeve 14 and the rotating table 13, increasing the transmission ratio of the rotating table 13 to the rotating sleeve 14, and accelerating the rotation speed of the fan 12. The heat dissipation rate of the heat exchange sleeve 203 is improved, and the material in the discharge shell 3 and the feed shell is prevented from melting, thereby blocking the transported material.

[0034] Before starting printing, the staff turns on the external water injection device and injects water into the first channel 302 in the rotating sleeve 14 through the water injection pipe 301. Then the water enters the second channel 303 along the first channel 302. At this time, the second channel 303 is blocked by the blocking block 306 and cannot continue to flow. When the rotating sleeve 14 slides along the fan 12, the rotating sleeve 14 drives the push rod 305 inside it to move synchronously. The push rod 305 pushes the blocking block 306 to separate the blocking block 306 from the fan 12. At the same time, the first elastic element 307 is compressed. At this time, the water in the second channel 303 continues to flow and then enters the water outlet holes 304 of the annular array. At this time, the water is discharged to the outside along the water outlet holes 304 of the annular array, and then blown to the outside of the heat exchange sleeve 203 by the fan 12, so that the water adheres to the heat sink outside the heat exchange sleeve 203, absorbs the heat of the heat exchange sleeve 203 through the vapor of the water, and further improves the heat dissipation speed of the heat exchange sleeve 203.

[0035] This continues until the temperature control element 5 detects that the temperature of the fixed block 2 is higher than the required value, at which point the temperature control element 5 lowers the temperature of the heating rod 4 to the required value, and the gas temperature in the first closed cavity is synchronously reduced, causing the piston shaft 7 to reset and slide, and the piston shaft 7 drives the telescopic end of the first elastic push rod 8 to reset synchronously, and the hydraulic oil in the fixed part of the second elastic push rod 9 flows back to the fixed part of the first elastic push rod 8, causing the telescopic end of the second elastic push rod 9 to drive the rotating sleeve 14 to reset to its initial state, and when the temperature of the heating rod 4 rises again, the above steps are repeated.

[0036] After long-term use, the temperature control element is easily damaged by high temperature and aging, resulting in the inability of the temperature control element to feedback the temperature of the heating element, causing the heating element to continue to heat up, which in turn causes the material to melt prematurely in the nozzle, thereby blocking subsequent nozzles and making the nozzle unable to perform 3D printing.

[0037] Embodiment 2: Based on embodiment 1, Figure 1 and Figure 5 As shown, it also includes an alarm component for reminding the heating rod 4 that the temperature rises. The alarm component is arranged on the right side of the fixed frame 1. The alarm component includes a connecting frame 401. The connecting frame 401 is rotatably connected to a rotating disk 402. The rotating disk 402 is fixedly connected to a ring array of reeds 403. The connecting frame 401 is fixedly connected to a bell 404. The bell 404 is used to emit a prompt sound. The reeds 403 in the ring array are all matched with the bell 404 when knocked. The rotating disk 402 drives the reeds 403 in the ring array thereon to knock the bell 404, so that the bell 404 emits a warning sound to remind the staff of the damage of the temperature control element 5. A connecting component for driving its own rotation is arranged on the rotating disk 402 through a connecting piece.

[0038] like Figure 5 and Figure 6 As shown, the connecting component includes a rotating ring 405, which is fixedly connected to the bottom of the rotating disk 402 through a connecting piece, and the outer side of the rotating ring 405 is sealingly rotatably connected to an outer ring 406, and the rotating ring 405 and the outer ring 406 cooperate to form a second closed cavity, and the second closed cavity is filled with hydraulic oil. A second flow pipe 407 is fixedly connected between the first flow pipe 10 and the outer ring 406, and the second flow pipe 407 is filled with hydraulic oil. The first flow pipe 10 is connected to the second closed cavity through the second flow pipe 407, and a limiting component is provided on the rotating ring 405 for docking itself with the first gear 202.

[0039] like Figure 6As shown, the limit assembly includes a sliding cylinder 408, the sliding cylinder 408 is fixed to the inside of the rotating ring 405, the sliding cylinder 408 is connected to the second closed cavity, the sliding cylinder 408 is sealed and slidably connected to the limit piston block 409, the hydraulic oil in the second closed cavity pushes the limit piston block 409 to slide along the sliding cylinder 408, and a second elastic element 410 is provided between the sliding cylinder 408 and the limit piston block 409, the second elastic element 410 is a spring, and the second elastic element 410 is used to drive the limit The piston block 409 is reset, and the elastic coefficient of the second elastic element 410 is greater than the elastic coefficient of the second elastic push rod 9, which is used to allow the hydraulic oil of the first circulation pipe 10 to preferentially enter the fixed part of the second elastic push rod 9. Four limit blocks 411 in an annular array are fixedly connected to the first gear 202, and the four limit blocks 411 in the annular array are all limitedly matched with the limit piston block 409, so that the limit piston block 409 is in contact with the limit block 411, and the rotating disk 402 is driven to rotate synchronously through the rotation of the first gear 202.

[0040] When the temperature control element is damaged, the heating rod 4 continues to heat up, and the gas in the first closed cavity continues to expand. The gas in the first closed cavity continues to push the piston shaft 7, so that the piston shaft 7 pushes the telescopic end of the first elastic push rod 8 to slide along its fixed part, and continuously pushes the hydraulic oil in the fixed part of the first elastic push rod 8 into the fixed part of the second elastic push rod 9, gradually increasing the heat dissipation rate of the heat exchange sleeve 203, until the telescopic end of the second elastic push rod 9 slides to the limit state, and then the gas in the first closed cavity continues to expand. At this time, the hydraulic oil in the fixed part of the first elastic push rod 8 enters the second circulation tube 407 along the first circulation tube 10, and then the hydraulic oil in the second circulation tube 407 enters the second closed cavity formed by the rotating ring 405 and the outer ring 406. At this time, the hydraulic oil in the second closed cavity enters the sliding cylinder 408, and the hydraulic oil in the sliding cylinder 408 The limiting piston block 409 is pushed out, and the second elastic element 410 is compressed. At this time, the first gear 202 rotates to drive the four limiting blocks 411 in the annular array thereon to rotate synchronously, so that the limiting blocks 411 contact the limiting piston block 409 and limit each other. At this time, the limiting block 411 pushes the limiting piston block 409 to rotate synchronously, and the limiting piston block 409 drives the rotating ring 405 to rotate through the sliding cylinder 408, and the rotating ring 405 drives the rotating disk 402 to rotate through the connecting piece, and the rotating disk 402 drives the reed 403 in the annular array thereon to rotate synchronously, and the reed 403 rotates and knocks the bell 404. The bell 404 makes a sound due to the knocking force, which reminds the staff that the temperature control element 5 is damaged, so that the staff can make an emergency shutdown, shut down the material transportation, stop printing, and avoid the material being continuously transported after the discharge shell 3 is blocked, resulting in material waste.

[0041] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-clogging nozzle for a 3D printer, comprising a fixing frame (1), the fixing frame (1) being fixedly connected to a fixing block (2), the fixing block (2) being fixedly connected to a discharge shell (3), the discharge shell (3) being composed of a feed shell and a discharge head, the connection between the fixing block (2) and the discharge shell (3) being the discharge head, the fixing block (2) being fixedly connected to a heating rod (4) and a temperature control element (5), wherein: The fixed block (2) further comprises a fixed cylinder (6), the fixed cylinder (6) being fixedly connected to the fixed block (2), the fixed cylinder (6) being sealingly and slidably connected to a piston shaft (7), and the two cooperate to form a first closed cavity, the first closed cavity being filled with a heat-expanding gas, a first elastic push rod (8) being fixedly connected to a side of the fixed frame (1) close to the fixed cylinder (6), the telescopic end of the first elastic push rod (8) being fixedly connected to the piston shaft (7), a second elastic push rod (9) being fixedly connected to a side of the fixed frame (1) away from the first elastic push rod (8), the fixing portion of the first elastic push rod (8) and the fixing portion of the second elastic push rod (9) being fixedly connected to each other. A first flow pipe (10) is fixedly connected and communicated between the two parts; a first motor (11) is fixedly connected to a side of the fixed frame (1) close to the second elastic push rod (9); a fan (12) is rotatably connected to a side of the fixed frame (1) close to the second elastic push rod (9); an output shaft of the first motor (11) is fixedly connected to a rotating table (13); a rotating sleeve (14) fitted with the rotating table (13) is spline-connected to the fan (12); a telescopic end of the second elastic push rod (9) is rotatably connected to the rotating sleeve (14); and a heat dissipation component for uniformly dissipating heat from the discharge shell (3) is provided on the fixed frame (1); The heat dissipation component comprises a second motor (201), and an output shaft of the second motor (201) is fixedly connected to a first gear (202); It also includes an alarm component for reminding the heating rod (4) that the temperature rises, the alarm component being arranged on a side of the fixing frame (1) close to the fixing cylinder (6), the alarm component including a connecting frame (401), the connecting frame (401) being rotatably connected to a rotating disk (402), the rotating disk (402) being fixedly connected to a ring-shaped array of reeds (403), the connecting frame (401) being fixedly connected to a bell (404), the reeds (403) in the ring-shaped array all cooperating with the bell (404) in knocking, and the rotating disk (402) being provided with a connecting component for driving its own rotation via a first connecting member; The connecting component comprises a rotating ring (405), the rotating ring (405) is fixedly connected to the rotating disk (402) via a first connecting member, the rotating ring (405) is sealingly and rotatably connected to an outer ring (406), the rotating ring (405) and the outer ring (406) cooperate to form a second closed cavity, a second flow tube (407) is fixedly connected between the first flow tube (10) and the outer ring (406), the first flow tube (10) is connected to the second closed cavity via the second flow tube (407), and a limiting component for docking the rotating ring (405) with the first gear (202) is provided on the rotating ring (405); The limiting assembly includes a sliding cylinder (408), the sliding cylinder (408) is fixedly connected to the inside of the rotating ring (405), the sliding cylinder (408) is communicated with the second closed cavity, the sliding cylinder (408) is sealed and slidably connected to the limiting piston block (409), a second elastic element (410) is provided between the sliding cylinder (408) and the limiting piston block (409), and the first gear (202) is fixedly connected to the limiting blocks (411) in an annular array, and the limiting blocks (411) in the annular array are all limitedly matched with the limiting piston block (409).

2. The anti-clogging nozzle for a 3D printer according to claim 1, characterized in that: The second motor (201) is fixedly connected to the fixing frame (1); the feed shell of the discharge shell (3) is rotatably connected to a heat exchange sleeve (203); a linear array of heat sinks are arranged outside the heat exchange sleeve (203); a second gear (204) is fixedly connected to the top of the heat exchange sleeve (203); the first gear (202) is meshed with the second gear (204); and a water injection component for accelerating the heat dissipation of the heat exchange sleeve (203) is arranged inside the fan (12).

3. The anti-clogging nozzle for a 3D printer according to claim 2, characterized in that: The cross-section of the external heat sink of the heat exchange sleeve (203) is in a transversely placed L-shape, which is used to increase the heat dissipation area of ​​the heat exchange sleeve (203).

4. The anti-clogging nozzle for a 3D printer according to claim 2, characterized in that: The water injection assembly comprises a water injection pipe (301), the water injection pipe (301) being rotatably connected to the rotating sleeve (14), a first channel (302) being arranged inside the rotating sleeve (14) and being communicated with the water injection pipe (301), a second channel (303) being arranged inside the fan (12) and being communicated with the first channel (302), a circular array of water outlet holes (304) being arranged on a side of the fan (12) away from the water injection pipe (301), the water outlet holes (304) in the circular array being all communicated with the second channel (303), and a blocking assembly for blocking the second channel (303) being arranged inside the fan (12).

5. The anti-clogging nozzle for a 3D printer according to claim 4, characterized in that: The blocking assembly comprises a push rod (305), the push rod (305) being fixedly connected to the inside of the rotating sleeve (14) via a second connecting member, the push rod (305) being located inside the second channel (303), a blocking block (306) being slidably connected to the inside of the fan (12) via a third connecting member, a first elastic element (307) being arranged between the blocking block (306) and the third connecting member of the fan (12), the blocking block (306) being pressed and matched with the push rod (305), and the blocking block (306) being blocked and matched with the second channel (303).

6. The anti-clogging nozzle for a 3D printer according to claim 5, characterized in that: The blocking block (306) is a truncated cone block, and the side of the blocking block (306) with a smaller diameter is the side close to the rotating sleeve (14).

7. The anti-clogging nozzle for a 3D printer according to claim 1, characterized in that: The elastic coefficient of the second elastic element (410) is greater than the elastic coefficient of the second elastic push rod (9).

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