3D printing method for convex structure of inner cone part

Abstract

The application discloses a kind of convex structure 3D printing method of inner cone parts, belong to 3D printing manufacturing technical field, it includes box, the base is placed in the bottom of the box, the outer side of the base is fixedly installed with portal frame, the first motor is installed in the base side, the fan that is used with the air suction pipe is installed in the working tank, the filter plate is installed in the first fixed block buckle;Through the extension head structure design to the inner wall of inner cone part main body, extension head itself has the effect of strengthening the overall structure support strength of part, the use amount of extension head and part inner wall part support can be greatly reduced when D printing, not only reduce the support material cost, but also can reduce subsequent support piece removal process, avoid to cause damage to extension head, part inner wall when removing support, further improve part forming quality and production efficiency, especially adapt to the precise printing demand of complex convex structure such as inner cone part inner wall extension head with structural strengthening function.

Description

Technical Field

[0001] This invention belongs to the field of 3D printing manufacturing technology, specifically a 3D printing method for protruding structures of internal conical parts. Background Technology

[0002] In the existing technology, the manufacturing methods of inner conical parts and their inner wall protrusions are mainly divided into two categories: traditional machining and 3D printing. Traditional machining often uses milling, grinding and welding processes. First, the main body of the inner conical part is machined, and then the extension head is fixed to the corresponding position on the inner wall by welding. This method is suitable for simple protrusion designs, but for the integrated manufacturing of complex inner wall surfaces and multiple sets of dense extension heads, there are problems such as many machining dead corners, low assembly accuracy, stress concentration and failure risks at the welding points. In addition, the production cycle is long and the tooling and mold dependence is high, making it difficult to adapt to the manufacturing needs of customized and complex structures.

[0003] With the development of additive manufacturing technology, 3D printing technology has gradually become the mainstream manufacturing method for complex internal conical parts with protruding structures due to its advantages of high design freedom, no need for special tooling, and the ability to achieve integrated molding. Among them, fused deposition modeling and selective laser melting technologies have been widely used in the production of such parts. By stacking consumables layer by layer, the main body of the internal conical part with the inner wall extension head is directly formed, which greatly simplifies the manufacturing process.

[0004] The existing technology has the following shortcomings:

[0005] Insufficient heat dissipation and molding stability; mismatch between the melting and cooling rates of consumables during 3D printing; local heat accumulation; existing equipment mostly uses single passive heat dissipation, which makes it difficult to achieve precise cooling of the printing area, affecting the structural strength and dimensional accuracy of the parts.

[0006] The metal 3D printing process generates volatile harmful gases. Some existing equipment lacks efficient filtration and purification mechanisms, and the leakage of harmful gases can also endanger the health of workers.

[0007] Meanwhile, in the existing technology, the inner wall extension head of the inner cone part mostly adopts a right-angle bottom design. In order to avoid collapse during the printing process, a large number of support components are required. This not only increases the consumption of consumables and printing time, but also easily causes scratches and damage to the surface of the extension head and the inner wall of the part when the support components are removed later, further reducing the part forming quality and increasing the cost of post-processing. Summary of the Invention

[0008] To overcome the above-mentioned defects, the present invention provides a 3D printing method for the protrusion structure of an inner cone part, which solves the technical problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a 3D printing method for a protruding structure of an inner conical part, comprising a housing, a base placed at the bottom of the housing, a gantry frame fixedly installed on the outside of the base, a first motor installed on one side of the base, a first threaded rod coaxially fixedly connected to the output end of the first motor, a second fixing block threadedly connected to the outside of the first threaded rod, a movable platform provided on the top of the second fixing block, a metal construction plate adsorbed on the top of the movable platform, the main body of the inner conical part placed on the top of the metal construction plate, a movable frame slidably connected between the gantry frames, a print head slidably connected to the outside of the movable frame, and the print head located on the metal construction plate. The movable platform is symmetrically embedded with a fan. Exhaust vents for the fan are located on both sides of the metal structural plate. Air inlets for the fan are located on both sides of the movable platform. A one-way air intake pipe for the fan and air inlets is located on the outer wall of the housing. Multiple extension heads are located within the main body of the inner cone component, with the bottom of each extension head having a sloping structure. First fixing blocks are symmetrically embedded on both sides of the housing. An exhaust pipe is connected to the outer side of each first fixing block. A working box is bolted to the back of the housing, and a fan for the exhaust pipe is installed inside the working box. A filter plate is snapped into the first fixing block.

[0010] As a further embodiment of the present invention: a second motor is embedded in the top of the gantry frame. The second motor is a dual-axis drive motor. The output end of the second motor is coaxially fixedly connected to a driving bevel gear. A driven bevel gear is meshed with one side of the driving bevel gear. A second threaded rod is coaxially fixedly connected to the bottom of the driven bevel gear. The driven bevel gear is threadedly connected to the second threaded rod.

[0011] As a further embodiment of the present invention: the top of the housing is provided with a consumable feed pipe for use with the print head, and the front of the housing is rotatably connected with a symmetrical structure.

[0012] As a further aspect of the present invention: the middle part of the box door is made of a transparent material.

[0013] As a further embodiment of the present invention: a protective shell is provided on one side of the base, the first motor is located inside the protective shell, and a sliding groove is provided on the top of the base to cooperate with the second fixing block.

[0014] As a further embodiment of the present invention: a card holder for use with the metal building plate is provided at the top of the movable platform, and a magnetic sheet for use with the metal building plate is installed inside the movable platform.

[0015] As a further aspect of the present invention: the filter plate adopts a composite filtration structure, which is composed of a HEPA high-efficiency filter layer and an activated carbon filter layer superimposed, and a dust filter is provided in the one-way air inlet pipe.

[0016] As a further aspect of the present invention, it includes the following steps:

[0017] Step 1, Equipment Pre-processing: Open the front door of the cabinet, fix the metal construction plate by magnetic adsorption inside the movable table, and use the card plate on the top of the movable table to complete the positioning. Close the door, check the installation status of the filter plate and the cleanliness of the dust filter in the one-way air inlet pipe, and ensure that the fan, fan and motor are operating normally. Feed the appropriate printing consumables to the print head through the consumable feed pipe.

[0018] Step 2, Printing parameter setting: Based on the structural parameters of the inner cone part body and the extension head, set the movement trajectory, printing speed and temperature parameters of the print head. For the inclined structure at the bottom of the extension head, preset the layer printing angle and stacking thickness. At the same time, set the rotation speed of the first motor driving the first threaded rod to control the horizontal movement accuracy of the movable table. Set the lifting speed of the second motor driving the movable frame to match the printing rhythm of the print head.

[0019] Step 3, Dynamic Printing Operation: Start the equipment. The fan uses the exhaust pipe and the filter plate in the first fixed block to perform negative pressure dust removal inside the box. The HEPA high-efficiency filter layer and the activated carbon filter layer of the filter plate work together to remove dust and odors generated during printing. At the same time, the fan starts, and outside air enters through the one-way air inlet pipe and the air inlet of the movable table. Then, it cools the printing area through the exhaust port of the metal structural plate to prevent the parts from deforming. The print head moves along the preset trajectory. With the horizontal movement of the movable table and the lifting and lowering of the movable frame, the layered printing of the main body of the inner cone part and the protruding structure of the extension head is completed.

[0020] Step 4, Post-printing processing: After printing, turn off all power components. After the internal temperature of the chamber drops to room temperature, open the chamber door, remove the main body of the inner cone part, clean the surface of the metal building plate, replace or clean the filter plate and dust filter, turn off the power of the equipment, and complete the entire printing process.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. By blowing air onto the metal construction plate and printing area through the fan, the heat generated during printing can be quickly removed, effectively preventing the main body of the inner cone part and the extension head from deforming or cracking due to excessive local temperature, thus ensuring the forming accuracy of the parts. At the same time, the fan and filter plate can filter and extract the dust and harmful gases generated during printing in a timely manner, maintaining a clean environment inside the chamber, preventing dust from adhering and affecting the surface quality of the parts, and reducing the leakage of harmful gases, thus ensuring operational safety.

[0023] 2. By designing the extension head structure on the inner wall of the inner cone part, the extension head itself strengthens the overall structural support of the part. At the same time, the bottom of the extension head is changed from a traditional right angle to a bevel. Combined with the improved molding stability brought about by fan cooling, the amount of support components used in the extension head and inner wall of the part can be greatly reduced during 3D printing. This not only reduces the cost of support materials but also reduces the subsequent support component removal process, avoiding damage to the extension head and inner wall of the part during support removal. This further improves the molding quality and production efficiency of the part, and is especially suitable for the precise printing needs of complex protruding structures such as the inner wall extension head of the inner cone part, which also has a structural reinforcement function. Attached Figure Description

[0024] Figure 1 This is a first-view schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a second-view schematic diagram of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention with the door removed;

[0027] Figure 4 This is a first-view schematic diagram of the cross-sectional structure of the box body of the present invention;

[0028] Figure 5 This is a second-view schematic diagram of the cross-sectional structure of the box body of the present invention;

[0029] Figure 6 This is a first-view schematic diagram of the three-dimensional cross-sectional structure of the base of the present invention;

[0030] Figure 7 This is a second-view schematic diagram of the three-dimensional cross-sectional structure of the base of the present invention;

[0031] Figure 8 This is a first-view schematic diagram of the cross-sectional three-dimensional structure of the gantry frame of the present invention;

[0032] Figure 9 This is a second-view schematic diagram of the cross-sectional three-dimensional structure of the gantry frame of the present invention.

[0033] In the diagram: 1. Box body; 2. Box door; 3. First fixing block; 4. Filter plate; 5. Exhaust pipe; 6. Working box; 7. Fan; 8. Base; 9. Gantry frame; 10. Movable frame; 11. Print head; 12. Movable table; 13. Metal structural plate; 14. Main body of inner cone part; 15. First motor; 16. First threaded rod; 17. Second fixing block; 18. Fan; 19. Exhaust port; 20. Air inlet; 21. Second motor; 22. Driving bevel gear; 23. Driven bevel gear; 24. Second threaded rod; 25. Extension head. Detailed Implementation

[0034] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0035] like Figures 1-9 As shown, the present invention provides a technical solution:

[0036] A 3D printing method for a protruding structure of an inner conical part includes a housing 1, a base 8 placed at the bottom of the housing 1, a gantry frame 9 fixedly mounted on the outside of the base 8, a first motor 15 mounted on one side of the base 8, a first threaded rod 16 coaxially fixedly connected to the output end of the first motor 15, a second fixing block 17 threadedly connected to the outside of the first threaded rod 16, a movable stage 12 provided on the top of the second fixing block 17, a metal construction plate 13 adsorbed on the top of the movable stage 12, the main body 14 of the inner conical part placed on the top of the metal construction plate 13, a movable frame 10 slidably connected between the gantry frames 9, a print head 11 slidably connected to the outside of the movable frame 10, the print head 11 being located above the metal construction plate 13, and the movable stage 12... A fan 18 is symmetrically embedded and installed inside the box 1. Exhaust vents 19 for use with the fan 18 are opened on both sides of the metal structural plate 13. Air inlets 20 for use with the fan 18 are opened on both sides of the movable platform 12. A one-way air inlet pipe for use with the fan 18 and the air inlet 20 is opened on the outer wall of the box 1. Multiple extension heads 25 are provided inside the inner cone part body 14, and the bottom of the extension head 25 is a sloping structure. A first fixing block 3 is symmetrically embedded and installed on both sides of the box 1. An exhaust pipe 5 is connected to the outside of the first fixing block 3. A working box 6 is installed on the back of the box 1 by bolts. A fan 7 for use with the exhaust pipe 5 is installed inside the working box 6. A filter plate 4 is snapped and installed inside the first fixing block 3.

[0037] Specifically, first place the base 8 at the bottom of the box 1 to ensure that the gantry 9 is securely installed on the outside of the base 8. Then, assemble the first motor 15 on one side of the base 8 so that the output end of the first motor 15 is coaxially fixed with the first threaded rod 16. Thread the second fixing block 17 to the outside of the first threaded rod 16 and install the movable platform 12 on its top. Fix the metal construction plate 13 to the top of the movable platform 12 through the adsorption structure inside the movable platform 12.

[0038] After completing the initial assembly, confirm that the movable frame 10 is slidably connected between the gantry 9, the print head 11 is slidably connected to the outside of the movable frame 10 and aligned with the printing area above the metal construction plate 13, check that the fans 18 symmetrically embedded in the movable table 12 are installed in place, and that the exhaust ports 19 on both sides of the metal construction plate 13 and the air inlets 20 on both sides of the movable table 12 are correspondingly matched with the one-way air inlet pipes on the outer wall of the box 1. At the same time, confirm that the filter plates 4 are snapped into place in the first fixing blocks 3 on both sides of the box 1, and that the first fixing blocks 3 are connected to the fan 7 in the working box 6 on the back of the box 1 through the exhaust pipe 5.

[0039] After the equipment is started, the print head 11 heats and extrudes the consumable. The first motor 15 drives the first threaded rod 16 to rotate, which drives the second fixed block 17 and the movable table 12 to move horizontally. The movable frame 10 on the gantry 9 cooperates to drive the print head 11 to move. The two work together to print the inner cone part body 14 layer by layer on the metal construction plate 13. Multiple sets of extension heads 25 will be printed on the inner wall of the inner cone part body 14 at the same time. During the printing process, the fan 18 starts at the same time. Outside air enters the movable table 12 through the one-way air inlet pipe and the air inlet 20 of the movable table 12, and then blows it to the printing area and the metal construction plate 13 through the exhaust port 19 of the metal construction plate 13. At the same time, the fan 7 starts to filter the exhaust gas and dust generated in the box 1 through the filter plate 4 in the first fixed block 3 and then extract it out of the box 1 through the exhaust pipe 5. After printing is completed, the equipment is turned off. After the part cools down, the formed inner cone part body 14 can be removed from the metal construction plate 13.

[0040] By blowing air onto the metal construction plate 13 and the printing area by the fan 18, the heat generated by printing can be quickly removed, effectively preventing the inner cone part body 14 and extension head 25 from deforming or cracking due to excessive local temperature, thus ensuring the forming accuracy of the parts. At the same time, the fan 7, together with the filter plate 4, can filter and extract the dust and harmful gases generated by printing in a timely manner, which not only maintains a clean environment inside the box 1 and prevents dust from adhering and affecting the surface quality of the parts, but also reduces the leakage of harmful gases and ensures operational safety.

[0041] By designing the inner wall extension head 25 of the inner cone part body 14, the extension head 25 itself has the function of strengthening the overall structural support of the part. At the same time, its bottom is changed from a traditional right angle to a bevel. Combined with the improved molding stability brought about by the cooling of the fan 18, the amount of support parts used in the extension head 25 and the inner wall of the part can be greatly reduced during 3D printing. This not only reduces the cost of support materials, but also reduces the subsequent support removal process, avoiding damage to the extension head 25 and the inner wall of the part when removing the support. This further improves the molding quality and production efficiency of the part, and is especially suitable for the precise printing needs of complex protruding structures such as the inner wall extension head 25 of the inner cone part, which also has the function of structural reinforcement.

[0042] A second motor 21 is embedded in the top of the gantry 9. The second motor 21 is a dual-axis drive motor. The output end of the second motor 21 is coaxially fixedly connected to a driving bevel gear 22. A driven bevel gear 23 is meshed on one side of the driving bevel gear 22. A second threaded rod 24 is coaxially fixedly connected to the bottom of the driven bevel gear 23. The driven bevel gear 23 and the second threaded rod 24 are threadedly connected. The top of the box 1 is provided with a consumable feed pipe for use with the print head 11. The front of the box 1 is symmetrically connected to the door 2. A protective shell is provided on one side of the base 8. The first motor 15 is located inside the protective shell. The top of the base 8 is provided with a sliding groove for use with the second fixing block 17. The top of the movable table 12 is provided with a card table for use with the metal construction plate 13. A magnetic sheet for use with the metal construction plate 13 is installed in the movable table 12. The filter plate 4 adopts a composite filter structure, which is composed of a HEPA high-efficiency filter layer and an activated carbon filter layer. A dust filter is provided in the one-way air inlet pipe.

[0043] Specifically, during use, the first motor 15 is placed inside the protective shell for protection. A sliding groove is opened on the top of the base 8, and the second fixing block 17 is embedded in the sliding groove and threadedly connected to the first threaded rod 16. A movable platform 12 is installed on the top of the second fixing block 17. A card table is set at the top of the movable platform 12 and a magnetic sheet is built in it. The metal construction plate 13 is positioned by the card table, and the metal construction plate 13 is stably adsorbed and fixed by the magnetic sheet.

[0044] The top of the gantry frame 9 is embedded with a second motor 21 connected to the dual-axis drive. The output end of the second motor 21 is coaxially fixed with a driving bevel gear 22. The driving bevel gear 22 is meshed with a driven bevel gear 23. The bottom of the driven bevel gear 23 is coaxially fixed with a second threaded rod 24 and threadedly connected to the second threaded rod 24, ensuring that the movable frame 10 can be raised and lowered through gear and threaded rod transmission.

[0045] The top of the housing 1 is equipped with a consumable feed pipe adapted to the print head 11 to supply material to the print head 11. The front of the housing 1 is symmetrically connected to the door 2 for easy workpiece loading and unloading and equipment inspection.

[0046] The filter plate 4 adopts a composite filter structure with HEPA high-efficiency filter layer and activated carbon filter layer superimposed, and is assembled in the corresponding position. At the same time, a dust filter is installed in the one-way air inlet pipe on the outer wall of the box 1. After the initial assembly is completed, the box door 2 is closed and the equipment is started. The second motor 21 drives the active bevel gear 22 to rotate, which drives the meshing driven bevel gear 23 and the second threaded rod 24 to rotate, realizing the lifting and adjustment of the movable frame 10 and the print head 11. The first motor 15 drives the first threaded rod 16 to rotate, which drives the second fixed block 17 to move smoothly along the top slide groove of the base 8, and simultaneously drives the movable table 12 and the metal construction plate 13 to move. The consumable is transported to the print head 11 through the feed pipe. The printing operation is completed with the transmission of each component. During the printing process, the dust filter in the one-way air inlet pipe blocks external impurities from entering. The filter plate 4 performs high-efficiency filtration and deodorization of the gas in the box 1. After printing, the equipment is turned off, the box door 2 is opened, and the formed workpiece can be removed.

[0047] The protective shell can effectively isolate external interference, prevent the first motor 15 from being contaminated by printing dust or damaged by accidental collision, and extend the service life of the motor. The sliding groove of the base 8 can limit the movement trajectory of the second fixed block 17, ensuring that the movable table 12 and the metal building plate 13 are stable and accurate in displacement, and improving the printing positioning accuracy.

[0048] The card slot and magnetic sheet of the movable table 12 cooperate to realize the rapid positioning and stable adsorption of the metal construction plate 13, avoiding the deviation of the construction plate during the printing process and causing part forming deviation. At the same time, it is convenient for the subsequent disassembly and cleaning of the construction plate. The dual-axis driven second motor 21, in conjunction with the bevel gear transmission structure, can drive the second threaded rod 24 to operate stably, realize the precise control of the lifting action of the print head 11, adapt to the printing needs of different heights, and have high transmission efficiency and stable operation.

[0049] The composite filter plate 4 can efficiently filter dust and odors in the gas. The dust filter in the one-way air inlet pipe can block external dust from entering the interior of the chamber 1, which not only ensures a clean printing environment and prevents dust from adhering and affecting the surface accuracy of the parts, but also reduces the diffusion of harmful gases, improves operational safety, and extends the service life of the internal components of the equipment.

[0050] The working principle of this invention is as follows:

[0051] First, the base 8 is placed at the bottom of the housing 1. The gantry 9 is securely installed on the outside of the base 8. A first motor 15 is installed inside the protective shell on one side of the base 8. The output end of the first motor 15 is coaxially fixed with the first threaded rod 16. A second fixing block 17 is embedded in the top groove of the base 8 and threadedly connected to the first threaded rod 16. A movable platform 12 is installed on its top. The card plate at the top of the movable platform 12, in conjunction with the built-in magnetic sheet, achieves precise positioning and stable adsorption of the metal construction plate 13. At the same time, a dual-axis driven second motor 21 is embedded in the top of the gantry 9. The driving bevel gear 22 fixed at its output end meshes with the driven bevel gear 23. 23 is coaxially fixed and threadedly connected to the bottom of the second threaded rod 24, ensuring that the movable frame 10 and the print head 11 can be smoothly lifted and lowered through gear and threaded rod transmission. The top of the box 1 is equipped with a consumable feed pipe adapted to the print head 11. The front is symmetrically rotated and connected to the box door 2. The first fixing block 3 on both sides is snapped with a composite filter plate 4 made of HEPA high-efficiency filter layer and activated carbon filter layer. The first fixing block 3 is connected to the fan 7 in the working box 6 on the back of the box 1 through the exhaust pipe 5. A dust filter is installed in the one-way air inlet pipe on the outer wall of the box 1. After all the assembly is completed, the box door 2 is closed to ensure the structural integrity and stability of the equipment before operation.

[0052] Next, the equipment is started to enter the printing operation stage. The print head 11 heats and extrudes the consumables. The first motor 15 drives the first threaded rod 16 to rotate, which drives the second fixed block 17 to move horizontally along the slide groove of the base 8. Simultaneously, it drives the movable table 12 and the metal building plate 13 to move. The second motor 21 drives the active bevel gear 22 to rotate, which drives the second threaded rod 24 to rotate through the meshing driven bevel gear 23. This realizes the lifting and lowering adjustment of the movable frame 10 and the print head 11. The movable frame 10 and the print head 11, the movable table 12 and the metal building plate 13 work together to print the inner cone part body 14 layer by layer on the metal building plate 13. At the same time, multiple sets of extension heads 25 that also serve as structural reinforcements on the inner wall of the part are printed simultaneously. During the printing process, the consumables are continuously and smoothly fed to the print head 11 through the feed pipe to ensure continuous printing.

[0053] It is worth mentioning that after the fans 18 symmetrically embedded in the movable table 12 are started, outside air enters through the one-way air intake pipe and the air inlet 20 of the movable table 12, and is then blown towards the printing area and the metal building plate 13 through the exhaust port 19 of the metal building plate 13. This quickly removes the heat generated by printing, preventing the inner cone part body 14 and the extension head 25 from deforming or cracking due to local high temperature. At the same time, the fan 7 starts, filtering the exhaust gas and dust generated by printing in the box 1 through the composite filter plate 4. After removing dust and odors, the exhaust gas is extracted through the exhaust pipe 5. The dust filter in the one-way air intake pipe blocks external impurities from entering, ensuring a clean printing environment and improving operational safety. In addition, the bottom of the extension head 25 is designed with a sloping structure. Combined with the molding stability brought by the cooling of the fan 18, the amount of support parts used can be greatly reduced, avoiding damage to the parts when the support is removed later.

[0054] Finally, after the printing job is completed, all equipment components are turned off. After the inner cone part body 14 cools to room temperature, the door 2 is opened and the molded part is removed from the metal construction plate 13. At the same time, basic cleaning and maintenance of the equipment is carried out, and the contamination of the filter plate 4 and dust filter is checked and replaced or cleaned in time to prepare for the next printing job. The whole process achieves accurate and efficient printing of complex protruding structures such as the inner wall extension head 25 of the inner cone part through the coordinated transmission of various components, heat dissipation and purification and structural optimization design.

[0055] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A 3D printing method for a protruding structure of an inner conical part, comprising a housing (1), characterized in that: A base (8) is placed at the bottom of the box (1). A gantry frame (9) is fixedly installed on the outside of the base (8). A first motor (15) is installed on one side of the base (8). A first threaded rod (16) is coaxially fixedly connected to the output end of the first motor (15). A second fixing block (17) is threadedly connected to the outside of the first threaded rod (16). A movable platform (12) is set on the top of the second fixing block (17). A metal construction plate (13) is adsorbed on the top of the movable platform (12). The main body of the inner cone part (14) is placed on the top of the metal construction plate (13). A movable frame (10) is slidably connected between the gantry frames (9). A print head (11) is slidably connected to the outside of the movable frame (10). The print head (11) is located above the metal construction plate (13). A fan is symmetrically embedded in the movable platform (12). 18), the metal construction plate (13) has exhaust vents (19) on both sides for use with the fan (18), the movable platform (12) has air inlets (20) on both sides for use with the fan (18), the outer wall of the box (1) has a one-way air inlet pipe for use with the fan (18) and the air inlet (20), the inner cone part body (14) is provided with multiple sets of extension heads (25), and the bottom of the extension head (25) is a sloping structure. The two sides of the box (1) are symmetrically embedded with first fixing blocks (3), and the outer side of the first fixing block (3) is connected to an exhaust pipe (5). The back of the box (1) is bolted with a work box (6), and the work box (6) is equipped with a fan (7) for use with the exhaust pipe (5). The first fixing block (3) is snapped with a filter plate (4).

2. The 3D printing method for the protrusion structure of an inner cone part according to claim 1, characterized in that: The top of the gantry frame (9) is embedded with a second motor (21), which is a dual-axis drive motor. The output end of the second motor (21) is coaxially fixedly connected to a driving bevel gear (22). A driven bevel gear (23) is meshed on one side of the driving bevel gear (22). A second threaded rod (24) is coaxially fixedly connected to the bottom of the driven bevel gear (23). The driven bevel gear (23) is threadedly connected to the second threaded rod (24).

3. The 3D printing method for the protrusion structure of an inner cone part according to claim 1, characterized in that: The top of the housing (1) is provided with a consumable feed pipe for use with the print head (11), and the front of the housing (1) is rotatably connected with a door (2) in a symmetrical structure.

4. The 3D printing method for the protrusion structure of an inner cone part according to claim 3, characterized in that: The middle part of the box door (2) is made of transparent material.

5. The 3D printing method for the protrusion structure of an inner cone part according to claim 1, characterized in that: A protective shell is provided on one side of the base (8), the first motor (15) is located inside the protective shell, and a sliding groove is provided on the top of the base (8) to cooperate with the second fixing block (17).

6. The 3D printing method for the protrusion structure of an inner cone part according to claim 1, characterized in that: The top of the movable platform (12) is provided with a card holder for use with the metal building plate (13), and a magnetic sheet for use with the metal building plate (13) is installed inside the movable platform (12).

7. The 3D printing method for the protrusion structure of an inner cone part according to claim 1, characterized in that: The filter plate (4) adopts a composite filtration structure, which is composed of a HEPA high-efficiency filter layer and an activated carbon filter layer. A dust filter is installed inside the one-way air inlet pipe.

8. A 3D printing method for a protruding structure of an inner conical part according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1, Equipment pretreatment: Open the front door (2) of the box (1), fix the metal building plate (13) by magnetic adsorption in the movable table (12), and use the card plate on the top of the movable table to complete the positioning. Close the door (2), check the installation status of the filter plate (4) and the cleanliness of the dust filter in the one-way air inlet pipe, and ensure that the blower (7), fan (18) and each motor are running normally. Feed the appropriate printing consumables to the print head (11) through the consumable feed pipe. Step 2, Printing parameter setting: Based on the structural parameters of the inner cone part body (14) and the extension head (25), set the movement trajectory, printing speed and temperature parameters of the print head (11). For the inclined structure at the bottom of the extension head (25), preset the layer printing angle and stacking thickness. At the same time, set the rotation speed of the first motor (15) driving the first threaded rod (16) to control the horizontal movement accuracy of the movable table (12). The lifting speed of the second motor (21) driving the movable frame (10) matches the printing rhythm of the print head (11). Step 3, Dynamic printing operation: Start the equipment. The fan (7) performs negative pressure dust removal treatment on the inside of the box (1) through the exhaust pipe (5) and the filter plate (4) in the first fixed block (3). The HEPA high-efficiency filter layer and the activated carbon filter layer of the filter plate (4) work together to remove the dust and odor generated during printing. At the same time, the fan (18) starts. Outside air enters through the one-way air inlet pipe and the air inlet (20) of the movable table (12). Then, the printing area is cooled by air through the exhaust port (19) of the metal building plate (13) to prevent the parts from deforming. The print head (11) moves along the preset trajectory. With the horizontal movement of the movable table (12) and the lifting and lowering of the movable frame (10), the layered printing of the inner cone part body (14) and the protruding structure of the extension head (25) is completed. Step 4, Post-printing processing: After printing, turn off all power components. After the internal temperature of the box (1) drops to room temperature, open the box door (2), remove the main body (14) of the inner cone part, clean the surface of the metal construction plate (13), replace or clean the filter plate (4) and dust filter, turn off the power of the equipment, and complete the entire printing process.

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