A multi-functional nozzle device based on a 3D printer

Abstract

This invention discloses a multi-functional nozzle device based on a 3D printer, relating to the field of 3D printing technology. Material is injected into a feed trough, where a heating rod operates. The heat-conducting sheet and heating rod heat the material. Since the material in the feed trough has different colors, one or more solenoid valves can be controlled to operate. The material enters the conical nozzle through the discharge pipe. A connecting shaft drives the conical seat and spiral blades to rotate, allowing the spiral blades to mix multiple different colors. Mixing different colored materials can create different colors, which are then ejected from the conical nozzle for 3D printing. This allows the material to fuse before exiting the conical nozzle, eliminating the need for multiple nozzles to achieve the purpose of 3D printing color products. It avoids pseudo-color phenomena, meets the diversified printing needs of products, and uses a single conical nozzle to achieve color product printing, thereby reducing usage costs and showing good application prospects.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and in particular to a multifunctional nozzle device based on a 3D printer. Background Technology

[0002] 3D printing, also known as additive manufacturing, is a rapid prototyping technology. It is a technique that uses digital model files as a basis and employs powdered metal or plastic and other bondable materials to construct objects layer by layer. 3D printing is usually achieved using digital material printers and is commonly used in mold making, industrial design and other fields to create models. It has also been gradually used for the direct manufacturing of some products. Parts printed using this technology already exist. This technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction, automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms and other fields.

[0003] 3D printers are an innovative digital manufacturing technology that can transform digital designs into physical objects. 3D printers create objects by stacking materials layer by layer and can use a wide variety of materials, including plastics, metals, ceramics, and biomaterials, offering broad application prospects. Since the first 3D printer appeared in the 1980s, 3D printing technology has developed rapidly and has been widely used in various fields. However, with its widespread application, safety hazards cannot be ignored, such as fires caused by high temperatures, poisoning from materials, and electric shocks from electrical circuits.

[0004] Existing technologies, such as CN104742366B, disclose a 3D printer nozzle device. This document points out that nozzle clogging necessitates the design of specialized tools for unclogging 3D printer nozzles, directly increasing the professional requirements for 3D printer operators. Due to the complexity of the technology involved, maintenance costs are increased, limiting the application scope to high-end manufacturing. The specific technical feature is that by limiting the width of multiple strip-shaped feed inlets on the feed ramp, the nozzle diameter of the micro-nozzle is larger than the width of the multiple strip-shaped feed inlets on the feed ramp. This allows the filamentous thermoplastic material to melt and enter the nozzle cavity, where it is extruded by the micro-nozzle. Meanwhile, particulate impurities larger than or equal to the nozzle diameter are trapped outside the strip-shaped feed inlets.

[0005] Other existing technologies include:

[0006] CN207224595U, Multi-function printhead for 3D printers

[0007] CN215550972U, A 3D printer nozzle device and a 3D printer

[0008] CN107901410A, A nozzle device for a 3D printer.

[0009] CN105196543A, A 3D printer nozzle device capable of high-speed printing.

[0010] However, the above-mentioned and other typical existing technologies still have certain problems in use:

[0011] The nozzle assembly did not take into account the dangers posed by high temperatures and materials.

[0012] High temperature: The nozzles and heated beds of 3D printers can reach very high temperatures, which could potentially cause a fire, especially if problems occur during the printing process.

[0013] Gases: During the 3D printing process, printers release various chemical gases, such as formaldehyde and benzene, which are harmful to human health.

[0014] Furthermore, while 3D printers with multiple nozzles can achieve color printing to some extent, each nozzle is responsible for a single color of material, requiring layering to change the color during printing. This results in a monotonous color output, leading to pseudo-color printing and making it difficult to meet the diverse printing needs of products. Additionally, using multiple nozzles increases the cost of use, making it difficult to promote.

[0015] In view of this, a multi-functional nozzle device based on a 3D printer is proposed to solve the above problems. Summary of the Invention

[0016] The purpose of this invention is to provide a multi-functional nozzle device based on a 3D printer to solve the problems mentioned in the background art.

[0017] To achieve the above objectives, the present invention provides the following technical solution: a multi-functional nozzle device based on a 3D printer, comprising a 3D printer body, a base connected to the bottom of the 3D printer body, an operation window and a control panel on the front of the 3D printer body, a printing table inside the 3D printer body, a protective shell above the printing table, a pressure boosting component connected to the top of the protective shell, the pressure boosting component penetrating the top of the 3D printer body, a conical nozzle at the bottom of the protective shell, a guide column connected to the conical nozzle, and a support component engaged with the portion of the conical nozzle extending into the protective shell. A radiator is connected to the top and is snapped onto the outside of the guide column. Four material troughs are opened inside the guide column, and a sealing cover is provided in each material trough. A branch pipe runs through the middle of the sealing cover, and the top ends of the four branch pipes are connected to a pressurizing component. A micro motor is connected to the bottom of the pressurizing component, and the output shaft of the micro motor is fixedly connected to the top end of a drive component. The drive component is located in the middle of the guide column. Four heating components and four sealing components are provided outside the drive component. The heating components and sealing components are all located inside the material troughs. Gas purification components are provided on both sides inside the protective shell, and the bottom of the gas purification components runs through the protective shell.

[0018] By adopting the above technical solutions: the radiator can achieve the purpose of absorbing heat from the conical nozzle, and in conjunction with the side fan, it can assist the conical nozzle in dissipating heat and improve the heat dissipation effect; the protective shell prevents the inhaled flue gas from drifting around, thus improving the treatment effect of the gas purification component on the flue gas.

[0019] As a preferred embodiment of the present invention, the pressurizing component includes a pressurizing screw motor, which is disposed on the top of the protective shell and has a feeding pipe on its top. The bottom of the pressurizing screw motor is connected to an injection cylinder, and a retaining sleeve is connected to the outside of the injection cylinder and fixed to the top of the protective shell.

[0020] By adopting the above technical solution: the booster screw motor works to inject material into the injection cylinder. As the pressure inside the injection cylinder continues to increase, the material can fall into the material trough inside the guide column through the four branch pipes, preventing air bubbles from being generated during the material pushing process and affecting the printing effect.

[0021] As a preferred embodiment of the present invention, the support assembly includes a mounting base, the middle of which is connected to a conical nozzle via a sliding sleeve, and the top of the mounting base is fixed to the bottom of the radiator via eight telescopic rods. Each telescopic rod is fitted with a spring, the top of which is connected to the bottom of the radiator, and the bottom of which is fixed to the fixed end of the bottom of the telescopic rod.

[0022] By adopting the above technical solution, when the conical nozzle is under pressure, it will push the telescopic rod upward, and work with the spring to provide reverse support to the mounting base, which plays a supporting and buffering role, preventing the conical nozzle from being damaged by pressure and improving the safety of use.

[0023] As a preferred embodiment of the present invention, the drive assembly includes a connecting shaft, the top end of which is fixed to the output shaft of a micro motor, a bushing is fitted over the connecting shaft, the bushing is snapped into the middle of the guide column, a conical column is fixedly connected to the bottom end of the connecting shaft, a spiral blade is provided outside the conical column, and both the conical column and the spiral blade are located inside the conical nozzle, and the ends of the heating assembly and the sealing assembly are embedded in the bushing.

[0024] By adopting the above technical solution: the micro motor drives the conical seat and the spiral blade to rotate through the connecting shaft, so that the spiral blade can mix a variety of different colors. The mixing of materials of different colors can be combined to form different colors. At the same time, the rotation of the spiral blade can help the material to be discharged from the conical nozzle, which plays a good role in preventing clogging.

[0025] As a preferred embodiment of the present invention, the heating component includes a heating rod, the top end of which is connected to a conduit, and a plurality of heat-conducting plates are provided on the outside of the heating rod and disposed in the material trough. The bottom end of the heating rod is connected to the sealing component through a plurality of heat-conducting rods.

[0026] By adopting the above technical solution, the heating rod works to transfer heat to multiple heat-conducting plates. The heat generated by the heat-conducting plates and the heating rod can heat the material and prevent the material from solidifying and affecting normal material discharge.

[0027] As a preferred embodiment of the present invention, the sealing assembly includes a discharge pipe, which is snapped into the material trough. A solenoid valve is provided at the bottom of the discharge pipe, and a wire pipe is connected to one side of the solenoid valve. The top of the discharge pipe is designed as an inverted cone.

[0028] By adopting the above technical solution: the materials in the trough are of different colors, and the operation of a single solenoid valve or multiple solenoid valves can be controlled so that the materials enter the conical nozzle through the discharge pipe, which makes it easy to achieve the purpose of color change according to the amount of material discharged.

[0029] As a preferred embodiment of the present invention, the gas purification assembly includes a filter box, which is installed on one side inside a protective shell. The top and bottom of the filter box are respectively provided with an exhaust port and an air inlet. The air inlet penetrates through the bottom of the protective shell. The filter box has a T-shaped design.

[0030] As a preferred embodiment of the present invention, a primary filter screen is provided in the filter box near the air inlet, and a HEPA filter screen is provided above the primary filter screen. The HEPA filter screen is fixed inside the filter box, and coal-based activated carbon packing is provided on both sides of the HEPA filter screen. The two sets of coal-based activated carbon packing are snapped onto the air guide plate, and the air guide plate is fixed inside the filter box.

[0031] By adopting the above technical solution, the flue gas is adsorbed onto the fibers of the HEPA filter for filtration. Since the HEPA filter can filter out particulate matter with a diameter greater than 0.3 micrometers in the air, and is made of glass fiber and polypropylene materials, it has high filtration performance and long service life. Combined with coal-based activated carbon filler for adsorption, a triple purification is formed, thereby improving the purification effect of the flue gas.

[0032] As a preferred embodiment of the present invention, a side fan is installed on one side of the protective shell, and a plurality of exhaust holes are provided on one side of the side fan. The exhaust holes are opened on the protective shell, and a dry powder storage device is provided on the other side of the protective shell. A smoke detector is connected to the bottom of the dry powder storage device.

[0033] By adopting the above technical solution: the smoke detector detects smoke, and the smoke absorbs light, reducing the light intensity reaching the photodiode. This leads to an increase in the resistance of the photodiode, generating a signal that smoke has been detected. When the detected smoke exceeds the threshold, the printing process can be stopped immediately and the safety latch of the dry powder memory is triggered, causing high-speed spraying onto the print table, thus improving the safety during automatic printing.

[0034] As a preferred embodiment of the present invention, the HEPA filter can filter out particulate matter with a diameter greater than 0.3 micrometers in the air and is made of glass fiber and polypropylene materials. The smoke detector is used to detect smoke and consists of a photoelectric sensor, a light-emitting diode, a photodiode and a control circuit.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. This invention utilizes a conical nozzle for jet printing. When the pressurization component operates, material is injected into the injection cylinder. As the pressure inside the cylinder increases, the material flows through four branch pipes into a material trough inside the guide column. At this time, a heating rod within the trough activates, transferring heat to multiple heat-conducting plates. The heat from the heat-conducting plates and heating rod heats the material, preventing it from solidifying and affecting normal discharge. Since the material in the trough has different colors, one or more solenoid valves can be controlled to allow the material to enter the conical nozzle through the discharge pipe. A micro-motor drives the conical seat and spiral blades to rotate via a connecting shaft, enabling the spiral blades to mix various colors. The mixing of different colored materials creates different colors, which are then ejected from the conical nozzle for 3D printing. This allows the material to fuse before exiting the conical nozzle, eliminating the need for multiple nozzles to achieve 3D printing of colored products. It avoids pseudo-color printing, meets diverse printing needs, and uses a single conical nozzle for color printing, thus reducing operating costs and demonstrating promising application prospects.

[0037] 2. This invention uses a protective shell to enclose two gas purification components. When the side fan is operating, the fumes generated during 3D printing are drawn in through the air inlet. The fumes first come into contact with a primary filter, which performs preliminary sieving. Then, they enter a HEPA filter, where the fumes are adsorbed onto the fibers for further filtration. Because the HEPA filter can filter out particles larger than 0.3 micrometers in diameter and is made of glass fiber and polypropylene, it has high filtration efficiency and a long lifespan. Combined with coal-based activated carbon filler, this forms a triple purification process. The gas is then discharged through the side fan. The air guide plate divides the internal space of the filter box, allowing the fumes to fully penetrate the coal-based activated carbon filler, improving the adsorption effect. Simultaneously, the radiator absorbs heat from the conical nozzle. Working in conjunction with the side fan, this assists in heat dissipation from the conical nozzle, improving the heat dissipation effect and solving the problem of hazards caused by gases generated during material melting, thus improving its safety.

[0038] 3. This invention detects smoke using a smoke detector. Smoke absorbs light, reducing the intensity of light reaching the photodiode and increasing its resistance, generating a smoke detection signal. The control circuit receives this signal, and when the smoke detection exceeds a threshold, printing immediately stops, the Z-axis rises, a buzzer on the control panel sounds an alarm, triggers the fuse of the dry powder storage, and sprays the powder onto the print table at high speed. The control panel can also be operated autonomously. When there is no smoke, the LED emits a beam of light, which passes through the photodiode and is converted into a weak current signal by the photoelectric sensor, stopping the alarm. This significantly improves safety during automatic printing and automatically initiates emergency response in case of fire. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0040] Figure 2 This is a schematic diagram of the protective shell and pressurization assembly of the present invention;

[0041] Figure 3 This is a schematic diagram of the cross-sectional structure of the protective shell of the present invention;

[0042] Figure 4 This is a schematic diagram of the connection between the support component and the guide column of the present invention;

[0043] Figure 5 This is a schematic diagram of the cross-section of the guide column of the present invention;

[0044] Figure 6 This is a schematic diagram of the connection between the driving component and the sealing component of the present invention;

[0045] Figure 7 This is a schematic diagram of the gas purification component of the present invention.

[0046] In the diagram: 1. 3D printer body; 2. Base; 3. Printing table; 4. Operation window; 5. Control panel; 6. Protective shell; 7. Pressure boosting assembly; 701. Pressure boosting screw motor; 702. Feed tube; 703. Injection cylinder; 704. Sleeve; 8. Conical nozzle; 9. Support assembly; 901. Mounting base; 902. Sliding sleeve; 903. Telescopic rod; 904. Spring; 10. Guide column; 11. Radiator; 12. Sealing cover; 13. Branch pipe; 14. Micro motor; 15. Drive assembly; 151. Connecting shaft; 152. Bushing; 153. Conical column ; 154. Spiral blades; 16. Heating assembly; 161. Heating rod; 162. Conduit 1; 163. Heat-conducting rod; 164. Heat-conducting plate; 17. Sealing assembly; 171. Discharge pipe; 172. Solenoid valve; 173. Conduit 2; 18. Gas purification assembly; 181. Filter box; 182. Exhaust port; 183. Air inlet; 184. HEPA filter; 185. Air guide plate; 186. Coal-based activated carbon packing; 187. Primary filter; 19. Exhaust vent; 20. Side fan; 21. Dry powder storage; 22. Smoke detector; 23. Material trough. Detailed Implementation

[0047] 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.

[0048] Please see Figure 1-7 This invention provides a technical solution for a multi-functional printhead device based on a 3D printer:

[0049] Example 1:

[0050] according to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a multi-functional nozzle device based on a 3D printer includes a 3D printer body 1, a base 2 connected to the bottom of the 3D printer body 1, an operation window 4 and a control panel 5 on the front of the 3D printer body 1, a printing table 3 inside the 3D printer body 1, a protective shell 6 above the printing table 3, a pressure boosting component 7 connected to the top of the protective shell 6 and penetrating the top of the 3D printer body 1, a conical nozzle 8 at the bottom of the protective shell 6, a guide column 10 connected to the conical nozzle 8, a support component 9 snapped into the portion of the conical nozzle 8 extending into the protective shell 6, and a heat sink 11 connected to the top of the support component 9. Outside the guide column 10, four material troughs 23 are provided inside the guide column 10. A sealing cover 12 is provided inside the material trough 23. A branch pipe 13 passes through the middle of the sealing cover 12. The top ends of the four branch pipes 13 are all connected to the pressurizing component 7. A micro motor 14 is connected to the bottom of the pressurizing component 7. The output shaft of the micro motor 14 is fixedly connected to the top end of the drive component 15. The drive component 15 is located in the middle of the guide column 10. Four heating components 16 and four sealing components 17 are provided outside the drive component 15. The heating components 16 and sealing components 17 are all located inside the material trough 23. Gas purification components 18 are provided on both sides inside the protective shell 6. The bottom of the gas purification component 18 passes through the protective shell 6.

[0051] The protective shell 6 prevents the inhaled smoke from spreading around, improving the smoke treatment effect of the gas purification component 18. The radiator 11 can absorb heat from the conical nozzle 8. Working in conjunction with the side fan 20, it can assist the conical nozzle 8 in dissipating heat and improve the heat dissipation effect.

[0052] The pressurization assembly 7 includes a pressurization screw motor 701, which is located on the top of the protective shell 6. The pressurization screw motor 701 is equipped with a feeding pipe 702 on its top and a feeding cylinder 703 connected to its bottom. A retainer 704 is connected to the outside of the feeding cylinder 703 and is fixed to the top of the protective shell 6. When the pressurization screw motor 701 is installed, it injects material into the feeding cylinder 703. As the pressure inside the feeding cylinder 703 continues to increase, the material can fall into the material trough 23 inside the guide column 10 through the four branch pipes 13, preventing air bubbles from being generated during the material pushing process and affecting the printing effect.

[0053] The drive assembly 15 includes a connecting shaft 151, the top end of which is fixed to the output shaft of the micro motor 14. A bushing 152 is fitted over the connecting shaft 151 and is snapped into the middle of the guide column 10. A conical column 153 is fixedly connected to the bottom end of the connecting shaft 151. A spiral blade 154 is provided on the outside of the conical column 153, and both the conical column 153 and the spiral blade 154 are located inside the conical nozzle 8. The ends of the heating assembly 16 and the sealing assembly 17 are embedded in the bushing 152. Because of the spiral blade 154, the spiral blade 154 can mix various colors. Mixing various materials of different colors can create different colors. At the same time, the spiral blade 154 can assist the material to be discharged from the conical nozzle 8 during rotation, thus playing a good anti-clogging role.

[0054] The heating assembly 16 includes a heating rod 161, with a conduit 162 connected to the top of the heating rod 161. Several heat-conducting plates 164 are provided on the outside of the heating rod 161 and are arranged in the material trough 23. The bottom of the heating rod 161 is connected to the sealing assembly 17 through several heat-conducting rods 163. Through the cooperation between the heating rod 161 and the heat-conducting plates 164, the heating rod 161 works to transfer heat to the multiple heat-conducting plates 164. The heat generated by the heat-conducting plates 164 and the heating rod 161 can heat the material and prevent the material from solidifying and affecting normal material discharge. The setting of the heat-conducting rods 163 allows the heat on the heating rod 161 to be transferred to the discharge pipe 171, preventing the material from solidifying on the discharge pipe 171 and affecting normal material discharge.

[0055] The sealing assembly 17 includes a discharge pipe 171, which is snapped into the material trough 23. A solenoid valve 172 is provided at the bottom of the discharge pipe 171. A wire conduit 173 is connected to one side of the solenoid valve 172. The top of the discharge pipe 171 is designed as an inverted cone. Because of the solenoid valve 172, the operation of a single solenoid valve 172 or multiple solenoid valves 172 can be controlled to allow the material to enter the conical nozzle 8 through the discharge pipe 171, so as to achieve the purpose of color change according to the amount of material discharged.

[0056] Example 2:

[0057] Based on Example 1, such as Figure 3 , Figure 4 and Figure 7As shown, the support assembly 9 includes a mounting base 901. The middle part of the mounting base 901 is connected to the conical nozzle 8 via a sliding sleeve 902. The top of the mounting base 901 is fixed to the bottom of the radiator 11 via eight telescopic rods 903. A spring 904 is sleeved on the telescopic rod 903. The top of the spring 904 is connected to the bottom of the radiator 11, and the bottom of the spring 904 is fixed to the fixed end of the bottom of the telescopic rod 903. Through the cooperation between the telescopic rod 903 and the spring 904, when the conical nozzle 8 is compressed, the conical nozzle 8 will press the telescopic rod 903 upward, which, together with the spring 904, provides reverse support to the mounting base 901, playing a supporting and buffering role, preventing the conical nozzle 8 from being damaged by pressure, and improving the safety of use.

[0058] The gas purification assembly 18 includes a filter box 181, which is installed on one side inside the protective housing 6. The top and bottom of the filter box 181 are respectively provided with an exhaust port 182 and an air inlet 183. The air inlet 183 penetrates through the bottom of the protective housing 6. The filter box 181 has a T-shaped design.

[0059] A primary filter 187 is provided inside the filter box 181 near the air inlet 183. A HEPA filter 184 is provided above the primary filter 187. The HEPA filter 184 is fixed inside the filter box 181. Coal-based activated carbon packing 186 is provided on both sides of the HEPA filter 184. The two sets of coal-based activated carbon packing 186 are snapped onto the air guide plate 185. The air guide plate 185 is fixed inside the filter box 181.

[0060] A side fan 20 is installed on one side of the protective shell 6. Several exhaust holes 19 are provided on one side of the side fan 20. The exhaust holes 19 are opened on the protective shell 6. A dry powder storage 21 is provided on the other side of the protective shell 6. A smoke detector 22 is connected to the bottom of the dry powder storage 21. The smoke detector 22 detects smoke. Smoke absorbs light, which reduces the light intensity reaching the photodiode. This will cause the resistance value of the photodiode to increase, generating a signal that smoke has been detected. When the detected smoke exceeds the threshold, the printing work can be stopped immediately and the safety bolt of the dry powder storage 21 is triggered, which sprays the powder onto the printing table 3 at high speed, improving the safety during automatic printing.

[0061] HEPA filter 184 can filter out particulate matter with a diameter greater than 0.3 microns in the air. It is made of glass fiber and polypropylene materials, which has high filtration performance and long service life. When combined with coal-based activated carbon filler 186 for adsorption, it forms triple purification, thereby improving the purification effect of flue gas.

[0062] The smoke detector 22 is used to detect smoke, and the smoke detector 22 consists of a photoelectric sensor, a light-emitting diode, a photodiode, and a control circuit.

[0063] Working principle:

[0064] In use, the booster screw motor 701 operates to inject material into the injection cylinder 703. As the pressure inside the injection cylinder 703 continues to increase, the material can fall into the material trough 23 inside the guide column 10 through the four branch pipes 13. At this time, the heating rod 161 inside the material trough 23 works to transfer heat to multiple heat-conducting plates 164. The heat-conducting plates 164 and the heating rod 161 can heat the material.

[0065] Because the materials in the material tank 23 are of different colors, a single solenoid valve 172 or multiple solenoid valves 172 can be controlled to work, so that the material enters the conical nozzle 8 through the discharge pipe 171. At this time, the micro motor 14 drives the conical seat and the spiral blade 154 to rotate through the connecting shaft 151, so that the spiral blade 154 can mix multiple different colors. Multiple different colored materials can be mixed to form different colors, and then sprayed out by the conical nozzle 8 for 3D printing, so that the material is fused before being sprayed out of the conical nozzle 8.

[0066] During the printing process, the generated fumes are drawn in through the air inlet 183. The fumes first come into contact with the primary filter 187, which performs preliminary sieving of the fumes. Then, the fumes enter the HEPA filter 184, where they are adsorbed onto the fibers for filtration. This process is further enhanced by the adsorption of the coal-based activated carbon filler 186, resulting in triple purification. The gas is then discharged through the side fan 20. Because the air guide plate 185 divides the internal space of the filter box 181, the fumes can fully penetrate the coal-based activated carbon filler 186. At the same time, the radiator 11 can absorb heat from the conical nozzle 8. In conjunction with the side fan 20, it can assist in the heat dissipation of the conical nozzle 8.

[0067] Smoke detector 22 detects smoke. Smoke absorbs light, reducing the light intensity reaching the photodiode and increasing its resistance, generating a smoke detection signal. The control circuit receives this signal. When the smoke detection exceeds the threshold, printing stops immediately, the Z-axis rises, the buzzer on control panel 5 sounds an alarm, triggering the fuse of dry powder memory 21 and causing high-speed spraying onto print table 3. When there is no smoke, the LED emits a beam of light, which passes through the photodiode and is converted into a weak current signal by the photoelectric sensor, stopping the alarm.

[0068] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0070] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A multi-functional nozzle device based on a 3D printer, comprising a 3D printer body (1), characterized in that: The 3D printer body (1) has a base (2) connected to its bottom. The front of the 3D printer body (1) has an operation window (4) and a control panel (5). The 3D printer body (1) has a printing table (3) inside. A protective shell (6) is provided above the printing table (3). A pressure boosting component (7) is connected to the top of the protective shell (6). The pressure boosting component (7) penetrates the top of the 3D printer body (1). A conical nozzle (8) is provided at the bottom of the protective shell (6). A guide column (10) is connected to the conical nozzle (8). A support component (9) is snapped into the part of the conical nozzle (8) that extends into the protective shell (6). A heat sink (11) is connected to the top of the support component (9). The heat sink (11) is snapped into the outside of the guide column (10). The guide column (10) is inside the... The part is provided with four material troughs (23), and a sealing cover (12) is provided in the material trough (23). A branch pipe (13) runs through the middle of the sealing cover (12). The top of the four branch pipes (13) is connected to the pressurizing component (7). A micro motor (14) is connected to the bottom of the pressurizing component (7). The output shaft of the micro motor (14) is fixedly connected to the top of the drive component (15). The drive component (15) is located in the middle of the guide column (10). Four heating components (16) and four sealing components (17) are provided outside the drive component (15). The heating components (16) and sealing components (17) are located in the material trough (23). Gas purification components (18) are provided on both sides inside the protective shell (6). The bottom of the gas purification component (18) runs through the protective shell (6). The pressurizing assembly (7) includes a pressurizing screw motor (701), which is located on the top of the protective shell (6). The pressurizing screw motor (701) is provided with a feeding pipe (702) on the top. The bottom of the pressurizing screw motor (701) is connected to a feeding cylinder (703), and a retainer (704) is connected to the outside of the feeding cylinder (703). The retainer (704) is fixed to the top of the protective shell (6). The gas purification component (18) includes a filter box (181), which is installed on one side inside the protective shell (6). The top and bottom of the filter box (181) are respectively provided with an exhaust port (182) and an air inlet (183). The air inlet (183) penetrates the bottom of the protective shell (6). The filter box (181) has a T-shaped design. A primary filter (187) is provided in the filter box (181) near the air inlet (183). A HEPA filter (184) is provided above the primary filter (187). The HEPA filter (184) is fixed inside the filter box (181). Coal-based activated carbon packing (186) is provided on both sides of the HEPA filter (184). The two sets of coal-based activated carbon packing (186) are snapped onto the air guide plate (185). The air guide plate (185) is fixed inside the filter box (181).

2. The multi-functional nozzle device based on a 3D printer according to claim 1, characterized in that: The support assembly (9) includes a mounting base (901), the middle of which is connected to the conical nozzle (8) via a sliding sleeve (902). The top of the mounting base (901) is fixed to the bottom of the radiator (11) via eight telescopic rods (903). The telescopic rods (903) are fitted with springs (904). The top of the springs (904) is connected to the bottom of the radiator (11), and the bottom of the springs (904) is fixed to the fixed end of the bottom of the telescopic rods (903).

3. A multi-functional nozzle device based on a 3D printer according to claim 2, characterized in that: The drive assembly (15) includes a connecting shaft (151), the top end of which is fixed to the output shaft of the micro motor (14). A bushing (152) is fitted over the connecting shaft (151), and the bushing (152) is snapped into the middle of the guide column (10). A conical column (153) is fixedly connected to the bottom end of the connecting shaft (151). A spiral blade (154) is provided on the outside of the conical column (153), and both the conical column (153) and the spiral blade (154) are located inside the conical nozzle (8). The ends of the heating assembly (16) and the sealing assembly (17) are embedded in the bushing (152).

4. A multi-functional nozzle device based on a 3D printer according to claim 3, characterized in that: The heating component (16) includes a heating rod (161), the top end of which is connected to a conduit (162). The heating rod (161) is provided with several heat-conducting plates (164), which are arranged in the material trough (23). The bottom end of the heating rod (161) is connected to the sealing component (17) through several heat-conducting rods (163).

5. A multi-functional nozzle device based on a 3D printer according to claim 4, characterized in that: The sealing assembly (17) includes a discharge pipe (171), which is snapped into the material trough (23). A solenoid valve (172) is provided at the bottom of the discharge pipe (171), and a wire pipe (173) is connected to one side of the solenoid valve (172). The top of the discharge pipe (171) is designed as an inverted cone.

6. A multi-functional nozzle device based on a 3D printer according to claim 5, characterized in that: A side fan (20) is installed on one side of the protective shell (6), and a number of exhaust holes (19) are provided on one side of the side fan (20). The exhaust holes (19) are opened on the protective shell (6). A dry powder storage device (21) is provided on the other side of the protective shell (6). A smoke detector (22) is connected to the bottom of the dry powder storage device (21).

7. A multi-functional nozzle device based on a 3D printer according to claim 6, characterized in that: The HEPA filter (184) can filter out particulate matter with a diameter greater than 0.3 micrometers in the air and is made of glass fiber and polypropylene. The smoke detector (22) is used to detect smoke and is composed of a photoelectric sensor, a light-emitting diode, a photodiode and a control circuit.

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