3D printing sequence dynamic pressure uniform flow filter system and its sequence dynamic pressure uniform flow filter method

Abstract

This invention discloses a 3D printing sequential ejection system with dynamic and static pressure equalization flow filtration, comprising a base, a printing substrate mounted from top to bottom within the base cavity, a sequential adjustment ejection structure, an airflow diversion vortex structure, and a self-cleaning filter structure mounted on the outside of the base. This invention also discloses an ejection method for the 3D printing sequential ejection system with dynamic and static pressure equalization flow filtration. The 3D printing sequential ejection system and its ejection method disclosed in this invention feature a printing substrate with detachable snap-fit ​​positioning inserts, capable of accommodating printed parts of various sizes, shapes, and material properties, exhibiting high adaptability. The sequential adjustment ejection structure rises in a predetermined sequence during ejection, enabling smooth separation of the printed part from the printing substrate. The self-cleaning filter structure and the airflow diversion vortex structure perform airflow thermal cleaning and airflow control, providing a stable airflow environment for the printing process.

Description

Technical Field

[0001] This invention belongs to the field of 3D printing equipment technology, and relates to a 3D printing sequential ejection system and ejection method based on dynamic and static pressure equalization and filtration. Background Technology

[0002] Existing 3D printing equipment typically relies on tools to remove the workpiece from the base, or manually separating the workpiece from the base. The base mainly serves a load-bearing function and has a relatively simple structure and function. The base has weak adaptability to workpieces of different sizes, shapes, and materials, and cannot meet the requirements for versatility. Moreover, the base area lacks an effective airflow organization structure, making it difficult to provide a stable and uniform upward airflow to the printing area. This is not conducive to temperature and flow field control in the printing area, and the air entering the base area is usually not effectively filtered and heated. Particulate impurities in the air may adversely affect the printing quality. However, in technical fields such as medical applications, which have high requirements for precision, stability, and cleanliness, there is an urgent need for a 3D printing workpiece removal system with high load-bearing adaptability, convenient workpiece removal, and airflow control capabilities. Summary of the Invention

[0003] The purpose of this invention is to provide a 3D printing sequential ejection system with dynamic and static pressure equalization and filtration, which has the characteristics of high load adaptability, convenient ejection, and airflow control.

[0004] Another object of the present invention is to provide a method for removing components from the above-described system.

[0005] The technical solution adopted in this invention is a 3D printing sequential ejection system with dynamic and static pressure equalization flow filtration, including a base. The base is a barrel-shaped structure with an upper open cavity. A printing substrate is assembled at the opening of the base. An airflow diversion vortex structure is assembled at the bottom of the base. An orderly adjustment ejection structure is assembled between the printing substrate and the airflow diversion vortex structure. A self-cleaning filter structure communicating with the airflow diversion vortex structure is provided on the outside of the base. Several positioning inserts are assembled on the printing substrate.

[0006] The invention is further characterized by: The bottom side wall of the base has an external air inlet. The self-cleaning filter structure is assembled on the external air inlet. The printing substrate has several insert mounting holes and several ejector through holes. The diameter of each insert mounting hole is different to accommodate positioning inserts of different sizes. Each insert mounting hole has a limiting boss. The side wall of each positioning insert has a limiting groove corresponding to the limiting boss. Some positioning inserts have several support holes. The diameter, spacing, number of holes, and distribution of holes of different sizes of positioning inserts are different.

[0007] The airflow diversion swirl guide structure includes a guide disk, which is a concave concentric frustum structure. The axial cross-section of the guide disk's sidewall is T-shaped. The guide disk is fixed to the bottom of the base, and the sidewall of the guide disk and the bottom of the base form a guide cavity. A wedge-shaped diversion guide block is provided axially on the outer wall of the guide disk, and the position of the wedge-shaped diversion guide block corresponds to the external air inlet. Several guide windows are opened on the outer wall of the guide disk on both sides of the wedge-shaped diversion guide block. Each guide window has an outer fan that opens towards the wedge-shaped diversion guide block. The outer fans are fixed to the side of the guide window away from the wedge-shaped diversion guide block. The outer wall of the guide disk also has the same number of arc-shaped baffles as the guide windows. The arc-shaped baffles have an S-shaped cross-section, with one end located at the bottom of the guide window on the side without the outer fan, and the other end facing the wedge-shaped diversion guide block. The guide window has an inner fan on the inner wall of the guide disk, which is fixed to both sides of the guide window. All inner fans open in the same direction. The inner bottom of the flow disk has a concave annular groove, and a swirling drive ring is assembled in the annular groove. The swirling drive ring has a cylindrical structure. The swirling drive ring, the inner wall of the flow guide disk, and the inner bottom of the flow guide disk form a swirling cavity. Several drive guide vanes are fixed to the outer wall of the swirling drive ring. Venturi flow holes are provided on the outer wall of the swirling drive ring between adjacent drive guide vanes. The Venturi flow holes penetrate the side wall of the swirling drive ring. An outer axial guide vane group is provided on the inner side of the swirling drive ring. An inner axial guide vane group is provided on the inner side of the outer axial guide vane group. Both the outer and inner axial guide vane groups include blade roots. The blade roots have a cylindrical structure. Several blades are fixed to the outer wall of the blade roots. The blade roots have flow holes that penetrate the inside and outside. A first slot, a second slot, and a third slot are provided on the inner bottom of the flow guide disk. The first slot and the second slot respectively engage the blade roots of the outer and inner axial guide vane groups.

[0008] When the opening direction of all inner fans is clockwise, the drive guide vanes tend to tilt to the right, the blades of the outer axial guide vane group tend to tilt to the left, and the blades of the inner axial guide vane group tend to tilt to the right; when the opening direction of all inner fans is counterclockwise, the drive guide vanes tend to tilt to the left, the blades of the outer axial guide vane group tend to tilt to the right, and the blades of the inner axial guide vane group tend to tilt to the left.

[0009] The Venturi orifice is an expansion-contraction-expansion flow channel.

[0010] A baffle ring is also provided between the guide plate and the inner side wall of the base. The baffle ring is a cylindrical structure. The side wall of the baffle ring is provided with an air inlet and several airflow unloading grooves. The airflow unloading grooves are slotted along the axial direction of the side wall of the baffle ring. The air inlet corresponds to the external air inlet.

[0011] The sequential adjustment ejection structure includes a sequential ejection disk, which is located on the upper part of the guide disk. A fixed post is fixedly connected to the center of the lower surface of the sequential ejection disk, and a rotating bearing is fixedly connected to the third slot. The top of the fixed post is assembled in the rotating bearing. The upper surface of the sequential ejection disk has a concentric ring array of multiple layers of sequential ejection rings. The height of the multiple layers of sequential ejection rings gradually decreases from the inside to the outside. The upper surface of the sequential ejection ring is a continuously undulating cam surface. The upper part of the sequential adjustment ejection structure is an ejection guide plate. The ejection guide plate has several guide holes in the middle. The guide holes are all projected onto the sequential ejection rings. The guide holes also correspond one-to-one with the ejection holes. Several ejection posts are provided between the sequential ejection disk and the printing substrate. One end of the ejection post contacts the cam surface, and the other end of the ejection post passes through the guide hole and is assembled in the ejection hole.

[0012] The edge of the sequential ejector disc has a gear ring structure, and the gear ring structure is fitted with a bevel gear adjustment knob. The bevel gear adjustment knob has an adjustment knob that is coaxial with it and extends through the side wall of the base. Both the sequential ejector disc and the ejector guide plate have through air guide grooves.

[0013] The self-cleaning filter structure includes a cylindrical shell, inside which is an electrically heated porous metal filter element. The electrically heated porous metal filter element has conductive electrode rings at both ends. The side wall of the cylindrical shell has a cold gas inlet and a power terminal. One end of the cylindrical shell is an end cap, and the other end of the cylindrical shell has a filtered gas outlet, which is connected to an external air inlet.

[0014] Another technical solution adopted in this invention is a part removal method for a 3D printing sequential part removal system using dynamic and static pressure equalization and filtration, comprising the following steps: S1 positioning insert selection and assembly; S2 airflow filtration and heat treatment; S3 airflow control; S4 printing complete, proceed with removal.

[0015] The invention is further characterized by: S1 selects positioning inserts to assemble on the printing substrate based on the size, shape and stress requirements of the part to be printed; The S2 activates the self-cleaning filter structure, allowing the airflow to be filtered and heated before entering the base. The S3 airflow is directed to the printed substrate area by the airflow diversion and vortex guide structure to form an upward airflow. After S4 printing is complete, the sequential adjustment ejection structure is activated to smoothly detach the printed part from the printing substrate.

[0016] The beneficial effects of this invention are as follows: The printing substrate used in this invention is provided with several insert mounting holes and several ejection through holes. The insert mounting holes are fitted with positioning inserts, which can select appropriate positioning inserts for positioning and adaptation according to the size, shape and material characteristics of the part to be printed, resulting in high adaptability. A sequential adjustment ejection structure is adopted, which sets sequential ejection rings of different heights and ejection columns assembled on the sequential ejection rings. During part removal, the ejection columns are raised in a predetermined order to achieve smooth separation of the printed part from the printing substrate. A self-cleaning filter structure and an airflow diversion and vortex guide structure are adopted. Before the airflow enters the printing substrate, it undergoes thermal cleaning, filtration, diversion, vortexing, flow regulation and axial flow conversion, and is finally delivered to the printing substrate area in the form of rising airflow, which can provide a stable airflow environment for the printing process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the 3D printing sequential part removal system of the dynamic and static pressure equalization flow filtration of the present invention; Figure 2 This is an exploded view of the structure of the 3D printing sequential part removal system for dynamic and static pressure equalization flow filtration of the present invention; Figure 3 This is a schematic diagram of the printing substrate structure of the 3D printing sequential part removal system of the dynamic and static pressure equalization flow filtration of the present invention; Figure 4 This is a schematic diagram of the airflow splitting vortex guide structure of the 3D printing sequential part removal system of the dynamic and static pressure equalization flow filtration of the present invention; Figure 5 This is a schematic diagram of the flow guide disk structure of the 3D printing sequential part removal system of the dynamic and static pressure equalization flow filtration of the present invention; Figure 6 This is a schematic diagram of the sequential adjustment ejection structure of the 3D printing sequential ejection system of the dynamic and static pressure equalization flow filtration of the present invention; Figure 7 This is a schematic diagram of the self-cleaning filter structure of the 3D printing sequential part removal system capable of static pressure uniform flow filtration according to the present invention. Figure 8 This is a flowchart of the part removal method for a 3D printing sequential part removal system with static pressure equalization and filtration.

[0018] In the diagram, 1. Base; 11. External air inlet; 2. Printed substrate; 21. Ejection through hole; 211. Limiting boss; 22. Insert mounting hole; 23. Positioning insert; 23a. Small positioning insert; 23b. Medium positioning insert; 23c. Large positioning insert; 23d. Holeless positioning insert; 231. Limiting groove; 3. Airflow diversion and swirl guide structure; 31. Guide plate; 311. Wedge-shaped diversion guide block; 312. Guide window; 313. Outer fan; 314. Arc-shaped baffle; 315. Inner fan; 316. Annular groove; 3171. First slot; 3172. Second slot; 3173. Third slot; 318. Rotating bearing; 32. Swirl drive ring; 321. Drive guide plate; 322. Venturi flow hole; 3 3. Outer axial guide vane assembly; 34. Inner axial guide vane assembly; 351. Blade root; 352. Blade; 353. Flow passage; 36. Baffle ring; 361. Air inlet; 362. Airflow unloading groove; 4. Sequential adjustment ejection structure; 41. Sequential ejection disc; 411. Gear ring structure; 412. Bevel gear adjustment knob; 413. Adjustment knob; 42. Fixed column; 43. Sequential ejection ring; 44. Cam surface; 45. Ejection guide plate; 46. Guide through hole; 47. Ejection column; 48. Air guide groove; 5. Self-cleaning filter structure; 51. Cylindrical outer shell; 52. Electrothermal porous metal filter element; 53. Conductive electrode ring; 54. Cold gas inlet; 55. Power terminal; 56. End cap; 57. Filtered gas outlet. Detailed Implementation

[0019] The following detailed description is provided in conjunction with specific implementation methods.

[0020] The dynamic and static pressure equalization flow filtration 3D printing sequential part removal system provided by this invention, such as... Figure 1-3 As shown, the device includes a base 1, which is a barrel-shaped structure with an upper open cavity. A printing substrate 2 is installed at the opening of the base 1. An airflow diversion vortex structure 3 is installed at the bottom of the base 1. An orderly adjustment ejection structure 4 is installed between the printing substrate 2 and the airflow diversion vortex structure 3. A self-cleaning filter structure 5 connected to the airflow diversion vortex structure 3 is provided on the outside of the base 1. Several positioning inserts 23 are installed on the printing substrate 2.

[0021] like Figure 1 and Figure 3As shown, the bottom side wall of the base 1 is provided with an external air inlet 11. The self-cleaning filter structure 5 is assembled on the external air inlet 11. The printing substrate 2 has several insert mounting holes 21 and several ejector through holes 22. The diameter of each insert mounting hole 21 is different, which can be used to assemble positioning inserts 23 of different sizes. Each insert mounting hole 21 is provided with a limiting boss 211. The side wall of the positioning insert 23 is provided with a limiting groove 231 corresponding to the limiting boss 211. Some positioning inserts 23 are provided with several support holes 232. The diameter, hole spacing, number of holes and hole distribution of the support holes 232 of different sizes of positioning inserts 23 are different.

[0022] like Figure 2 , Figure 4 and Figure 5As shown, the airflow diversion swirl structure 3 includes a guide plate 31, which is a concave concentric frustum structure. The axial section of the sidewall of the guide plate 31 is T-shaped. The guide plate 31 is fixed to the bottom of the base 1. The sidewall of the guide plate 31 and the bottom of the base 1 form a guide cavity. A wedge-shaped diversion guide block 311 is provided on the outer sidewall of the guide plate 31 along the axial direction. The position of the wedge-shaped diversion guide block 311 corresponds to the external air inlet 11. Several guide windows 312 are opened on the outer sidewall of the guide plate 31 on both sides of the wedge-shaped diversion guide block 311. Each guide window 312 is provided with a guide to the wedge-shaped diversion guide block 311. The outer fan 313 opens to the side, and each outer fan 313 is fixed to the side of the guide window 312 away from the wedge-shaped diverting guide block 311. The outer wall of the guide plate 31 is also fixed with the same number of arc-shaped baffles 314 as the guide window 312. The arc-shaped baffles 314 have an S-shaped cross-section, with one end located at the bottom of the side of the guide window 312 without the outer fan 313, and the other end facing the wedge-shaped diverting guide block 311. The guide window 312 has inner fans 315 on the inner wall of the guide plate 31, and the inner fans 315 are fixed to both sides of the guide window 312. All inner fans 315 have the same opening direction. The inner bottom of the flow disk 31 is provided with a concave annular groove 316, and a swirling drive ring 32 is assembled in the annular groove 316. The swirling drive ring 32 is a cylindrical structure. The swirling drive ring 32, the inner wall of the flow disk 31, and the inner bottom of the flow disk 31 form a swirling cavity. Several drive guide vanes 321 are fixed to the outer wall of the swirling drive ring 32. Venturi flow holes 322 are provided on the outer wall of the swirling drive ring 32 between adjacent drive guide vanes 321. The Venturi flow holes 322 penetrate the side wall of the swirling drive ring 32. The inner side of the swirling drive ring 32 is provided with an outer axial guide vane assembly 33. The inner side of the guide vane assembly 33 is provided with an inner axial guide vane assembly 34. Both the outer axial guide vane assembly 33 and the inner axial guide vane assembly 34 include a blade root 351. The blade root 351 is a cylindrical structure. Several blades 352 are fixed to the outer wall of the blade root 351. The blade root 351 is provided with a through-hole 353 that penetrates the inside and outside. The bottom of the inner side of the guide disk 31 is provided with a concentric first slot 3171, a second slot 3172 and a third slot 3173. The first slot 3171 and the second slot respectively engage the blade roots 351 of the outer axial guide vane assembly 33 and the inner axial guide vane assembly 34.

[0023] When the opening direction of all inner fans 315 is clockwise, the drive guide vane 321 tends to tilt to the right, the blades 352 of the outer axial guide vane group 33 tend to tilt to the left, and the blades 352 of the inner axial guide vane group 34 tend to tilt to the right; when the opening direction of all inner fans 315 is counterclockwise, the drive guide vane 321 tends to tilt to the left, the blades 352 of the outer axial guide vane group 33 tend to tilt to the right, and the blades 352 of the inner axial guide vane group 34 tend to tilt to the left; the Venturi flow hole 322 is an expansion-contraction-expansion flow channel; a baffle ring 36 is also provided between the guide plate 31 and the inner side wall of the base 1. The baffle ring 36 is a cylindrical structure. The side wall of the baffle ring 36 is provided with an air inlet 361 and several airflow unloading grooves 362. The airflow unloading grooves 362 are slotted along the axial direction of the side wall of the baffle ring 36. The air inlet 361 corresponds to the external air inlet 11.

[0024] like Figure 2 and Figure 6 As shown, the sequential adjustment ejection structure 4 includes a sequential ejection disk 41, which is located on the upper part of the guide disk 31. A fixed post 42 is fixedly connected to the center of the lower surface of the sequential ejection disk 41, and a rotating bearing 318 is fixedly connected to the third slot 3173. The top of the fixed post 42 is assembled in the rotating bearing 318. The upper surface of the sequential ejection disk 41 has a concentric array of multiple layers of sequential ejection rings 43. The height of the multiple layers of sequential ejection rings 43 gradually decreases from the inside to the outside. The upper surface of the sequential ejection rings 43 is a continuously undulating cam surface 44. The upper part of the sequential adjustment ejection structure 4 is an ejection guide plate 45, and the middle part of the ejection guide plate 45 is provided with several guide through holes 46. The guide holes 46 are all projected onto the sequential ejection ring 43. The guide holes 46 also correspond one-to-one with the ejection holes 22. A number of ejection posts 47 are provided between the sequential ejection disc 41 and the printing substrate 2. One end of the ejection post 47 contacts the cam surface 44, and the other end of the ejection post 47 passes through the guide holes 46 and is assembled in the ejection holes 22. The edge of the sequential ejection disc 41 is a gear ring structure 411. The gear ring structure 411 is meshed with a bevel gear adjustment knob 412. The bevel gear adjustment knob 412 is provided with an adjustment knob 413 that is coaxial with it and passes through the side wall of the base 1. The sequential ejection disc 41 and the ejection guide plate 45 are both provided with through air guide grooves 48.

[0025] like Figure 7 As shown, the self-cleaning filter structure 5 includes a cylindrical shell 51, an electrically heated porous metal filter element 52 is provided inside the cylindrical shell 51, conductive electrode rings 53 are provided at both ends of the electrically heated porous metal filter element 52, a cold gas inlet 54 and a power terminal 55 are provided on the side wall of the cylindrical shell 51, one end of the cylindrical shell 51 is an end cap 56, and the other end of the cylindrical shell 51 is a filtered gas outlet 57, which is connected to the external air inlet 11.

[0026] The part removal method of the 3D printing sequential part removal system with dynamic and static pressure equalization flow filtration is as follows: Figure 8As shown, it includes the following steps: S1 positioning insert 23 is selected and assembled; S2 airflow filtration and heat treatment; S3 airflow control; S4 printing complete, proceed with removal.

[0027] The specific steps of S1 are as follows: Based on the size, shape and stress requirements of the part to be printed, select the positioning insert 23 and assemble it on the printing substrate 2; The specific steps of S2 are: activate the self-cleaning filter structure 5 to allow the airflow to complete filtration and heating treatment before entering the base 1; The specific steps of S3 are as follows: the airflow is transported to the printing substrate 2 area by the airflow diversion and vortex guide structure 3 to form an upward airflow. The specific steps of S4 are as follows: After printing is completed, start the sequential adjustment ejection structure 4 to smoothly separate the printed part from the printing substrate 2.

[0028] Example 1 The dynamic and static pressure equalization flow filtration 3D printing sequential part removal system proposed in this embodiment, such as... Figure 1-2 As shown, the system includes a base 1, which is a barrel-shaped structure with an open cavity at the top. A printing substrate 2 is mounted at the opening of the base 1. An airflow diversion and vortex guide structure 3 is mounted at the bottom of the base 1. A sequential adjustment ejection structure 4 is mounted between the printing substrate 2 and the airflow diversion and vortex guide structure 3. A self-cleaning filter structure 5, which communicates with the airflow diversion and vortex guide structure 3, is located on the outside of the base 1. The printing substrate 2 is equipped with several positioning inserts 23. In this embodiment, external airflow enters the self-cleaning filter structure 5 for air filtration and heat treatment. The treated airflow then enters the airflow diversion and vortex guide structure 3, which communicates with the self-cleaning filter structure 5. The airflow diversion and vortex guide structure 3 guides the filtered gas through circumferential flow, vortex formation, Venturi flow regulation, and axial flow conversion, ultimately delivering it to the printing substrate 2 area in the form of an upward airflow, providing a stable airflow environment for the printing process. Before printing, a suitable positioning insert 23 is selected and mounted on the printing substrate 2. After printing, the sequential adjustment ejection structure 4 smoothly separates the printed part from the printing substrate.

[0029] Example 2 The dynamic and static pressure equalization flow filtration 3D printing sequential part removal system provided in this embodiment, such as... Figure 1-3As shown, the device includes a base 1, which is a barrel-shaped structure with an open cavity at the top. A printing substrate 2 is mounted at the opening of the base 1. An airflow diversion vortex structure 3 is mounted at the bottom of the base 1. An orderly adjustment ejection structure 4 is mounted between the printing substrate 2 and the airflow diversion vortex structure 3. A self-cleaning filter structure 5, which communicates with the airflow diversion vortex structure 3, is provided on the outside of the base 1. An external air inlet 11 is provided at the bottom of the side wall of the base 1. The self-cleaning filter structure 5 is mounted on the external air inlet 11. The printing substrate 2 has several insert mounting holes 21 and several ejection through holes 22. The diameter of each insert mounting hole 21 is different, which can be used to assemble positioning inserts 23 of different sizes. Each insert mounting hole 21 has a limiting boss 211. The side wall of each positioning insert 23 has a limiting groove 231 corresponding to the limiting boss 211. Some positioning inserts 23 have several support holes 232. The diameter, spacing, number of holes, and distribution of the support holes 232 of different sizes of positioning inserts 23 are different.

[0030] In this embodiment, before printing, a matching positioning insert 23 is selected and snapped into the insert mounting hole 21 according to the size, shape, and stress requirements of the part to be printed. This allows for rapid adaptation to different types of printed parts without replacing the entire printing substrate 2. The positioning insert 23 includes a small positioning insert 23a with an outer diameter of 12mm and a support hole 232 with a diameter of 1mm. The small positioning insert 23a has 19 densely distributed support holes 232 arranged in a three-layer concentric ring array, with a center-to-center distance of 2.0mm between adjacent layers of support holes 232. The medium-sized positioning insert 23b has an outer diameter of 20mm and a support hole 232 with a diameter of 2.0mm. The medium-sized positioning insert 23b has 13 densely distributed support holes 232 arranged in a honeycomb hexagonal close-packed array, with a center-to-center distance of 3.5 mm between adjacent layers of support holes 232; the large positioning insert 23c has a 30 mm outer diameter and 4.0 mm diameter support holes 232, with 9 sparsely distributed support holes 232 arranged in a cross-shaped distribution, with a center-to-center distance of 5.5 mm between adjacent layers of support holes 232; and the holeless positioning insert 23d has no support holes 232, and is available in three sizes with outer diameters of 12 mm, 20 mm and 30 mm respectively; by setting positioning inserts 23 with different structural parameters, the printing substrate 2 can be modularly adapted to printed parts of different sizes, shapes and stress requirements, thereby improving the system's versatility, positioning stability and stress rationality.

[0031] Example 3 The dynamic and static pressure equalization flow filtration 3D printing sequential part removal system provided in this embodiment, such as... Figure 1-5As shown, the system includes a base 1, which is a barrel-shaped structure with an open cavity at the top. A printing substrate 2 is mounted at the opening of the base 1. An airflow diversion and swirl guide structure 3 is mounted at the bottom of the base 1. The airflow diversion and swirl guide structure 3 includes a guide plate 31, which is a concave concentric frustum structure. The axial section of the sidewall of the guide plate 31 is T-shaped. The guide plate 31 is fixed to the bottom of the base 1. The sidewall of the guide plate 31 and the bottom of the base 1 form a guide cavity. A wedge-shaped diversion guide block 311 is provided on the outer sidewall of the guide plate 31 along the axial direction. The position of the wedge-shaped diversion guide block 311 corresponds to the external air inlet 11. The outer sidewall of the guide plate 31 located on both sides of the wedge-shaped diversion guide block 311 has several openings. Each of the flow guide windows 312 has an outer fan 313 that opens towards one side of the wedge-shaped diverting guide block 311. The outer fans 313 are all fixed to the side of the flow guide window 312 away from the wedge-shaped diverting guide block 311. The outer wall of the flow guide disk 31 also has the same number of arc-shaped baffles 314 as the flow guide windows 312. The arc-shaped baffles 314 have an S-shaped cross-section, with one end located at the bottom of the side of the flow guide window 312 without the outer fan 313, and the other end facing the wedge-shaped diverting guide block 311. The flow guide window 312 has an inner fan 315 on the inner wall of the flow guide disk 31, which is fixed to both sides of the flow guide window 312. All inner fans 315 have the same opening direction. The inner bottom of the guide plate 31 is provided with a concave annular groove 316, and a swirling drive ring 32 is assembled in the annular groove 316. The swirling drive ring 32 is a cylindrical structure. The swirling drive ring 32, the inner side wall of the guide plate 31, and the inner bottom of the guide plate 31 form a swirling cavity. Several drive guide vanes 321 are fixed to the outer wall of the swirling drive ring 32. Venturi flow holes 322 are provided on the outer wall of the swirling drive ring 32 between adjacent drive guide vanes 321. The Venturi flow holes 322 penetrate the side wall of the swirling drive ring 32. An outer axial guide vane assembly 33 is provided on the inner side of the swirling drive ring 32. An inner axial guide vane assembly 34 is provided on the inner side of the outer axial guide vane assembly 33. Both the guide vane assembly 33 and the inner axial guide vane assembly 34 include a blade root. The blade root 351 is a cylindrical structure. Several blades 352 are fixed to the outer wall of the blade root 351. The blade root 351 is provided with a through-hole 353 that penetrates the inside and outside. The bottom of the inner side of the guide plate 31 is provided with a concentric first slot 3171, a second slot 3172 and a third slot 3173. The first slot 3171 and the second slot respectively engage the blade roots 351 of the outer axial guide vane assembly 33 and the inner axial guide vane assembly 34. An orderly adjustment ejection structure 4 is assembled between the printing substrate 2 and the airflow diversion vortex structure 3. A self-cleaning filter structure 5 that communicates with the airflow diversion vortex structure 3 is provided on the outside of the base 1.The base 1 has an external air inlet 11 on its bottom side wall. A self-cleaning filter structure 5 is mounted on the external air inlet 11. The printing substrate 2 has several insert mounting holes 21 and several ejector through holes 22. The diameter of each insert mounting hole 21 is different to accommodate positioning inserts 23 of different sizes. Each insert mounting hole 21 has a limiting boss 211. The side wall of each positioning insert 23 has a limiting groove 231 corresponding to the limiting boss 211. Each positioning insert 23 has several support holes 232. The diameter, spacing, number of holes, and distribution of the support holes 232 differ among different positioning inserts 23.

[0032] In this embodiment, the airflow entering the airflow splitting vortex guide structure 3 through the self-cleaning filter structure 5 first passes through the guide cavity formed by the side wall of the guide plate 31 and the bottom of the base 1, and interacts with the wedge-shaped splitting guide block 311, thus being divided into two airflows flowing along both sides, thereby achieving initial splitting in the circumferential direction. The split airflow flows around the guide cavity, and during the flow process, it passes through the arc-shaped baffle 314 and the guide window 312 set on the outer edge of the guide plate 31 and enters the interior of the guide plate 31. Through the guiding action of the inner fan 315, it is uniformly adjusted into a circumferential airflow flowing in the same direction. The circumferential airflow after the above guidance continues to flow towards the vortex drive ring 32 and acts on the vortex drive. The driving guide vane 321 on the moving ring 32 drives the swirling drive ring 32 to rotate on the annular groove 316. Then, the airflow enters the inner guide region through the Venturi flow hole 322 provided on the side wall of the swirling drive ring 32. In this embodiment, it should be noted that the Venturi flow hole 322 is an expansion-contraction-expansion flow channel, which is beneficial to adjust the local flow velocity distribution and improve the flow stability. After passing through the Venturi flow hole 322, the airflow first enters the outer axial guide vane group 33 region, and then enters the inner axial guide vane group 34 region through the flow hole 353. Finally, it continues to flow through the flow hole 353 of the inner axial guide vane group 34.

[0033] Example 4 Based on Example 3, such as Figure 2 and Figure 4 As shown, a baffle ring 36 is also provided between the guide plate 31 and the inner side wall of the base 1. The baffle ring 36 has a cylindrical structure. The side wall of the baffle ring 36 is provided with an air inlet 361 and several airflow unloading grooves 362. The airflow unloading grooves 362 are slotted along the axial direction of the side wall of the baffle ring 36. The air inlet 361 corresponds to the external air inlet 11. The airflow unloading grooves 362 release and buffer the local airflow pressure in the guide cavity to improve the stability of airflow.

[0034] Example 5 Based on Example 3, such as Figure 4 and Figure 5As shown, when the opening direction of all inner fans 315 is clockwise, the drive guide vane 321 tends to tilt to the right, the blades 352 of the outer axial guide vane group 33 tend to tilt to the left, and the blades 352 of the inner axial guide vane group 34 tend to tilt to the right; when the opening direction of all inner fans 315 is counterclockwise, the drive guide vane 321 tends to tilt to the left, the blades 352 of the outer axial guide vane group 33 tend to tilt to the right, and the blades 352 of the inner axial guide vane group 34 tend to tilt to the right. When all inner fan 315 openings are clockwise, the airflow exerts a greater thrust on the right-tilted drive guide vane 321 than on the left-tilted drive guide vane 321, resulting in a higher rotational speed for the vortex drive ring 32, and vice versa. When all inner fan 315 openings are clockwise, the vortex drive ring 32 rotates clockwise. At this time, the blades 352 of the outer axial guide vane assembly 33 are tilted to the left, and the airflow enters the outer axial guide vane assembly through the Venturi flow passage 322. After entering the region of the outer axial guide vane group 33, the gas is first forced into a vertically upward axial jet by the action of the blades 352 of the outer axial guide vane group 33 tilted to the right. When the blades 352 of the outer axial guide vane group 33 tilt to the right, it will hinder the vertical upward airflow. When the opening direction of all inner fans 315 is counterclockwise, the opposite is also true. After the gas enters the region of the outer axial guide vane group 33, it is first forced into a vertically upward axial jet by the action of the blades 352 of the outer axial guide vane group 33. The residual airflow that is not completely converted enters the inner axial guide vane group 34 through the flow hole 353 and continues to be converted into a vertically upward airflow. The two coaxial airflows inside and outside have opposite tangential momentum and cancel each other out, forming a vertical airflow that is straight upward with uniform pressure. The residual airflow that is not completely converted by the inner axial guide vane group 34 is then vertically upward after passing through the flow hole 353 and transported to the printing substrate 2 region along with the external airflow, providing a stable airflow environment for the printing process.

[0035] Example 6 The dynamic and static pressure equalization flow filtration 3D printing sequential part removal system provided in this embodiment, such as... Figure 1-6As shown, the system includes a base 1, which is a barrel-shaped structure with an open cavity at the top. A printing substrate 2 is mounted at the opening of the base 1. An airflow diversion and swirl guide structure 3 is mounted at the bottom of the base 1. The airflow diversion and swirl guide structure 3 includes a guide plate 31, which is a concave concentric frustum structure. The axial section of the sidewall of the guide plate 31 is T-shaped. The guide plate 31 is fixed to the bottom of the base 1. The sidewall of the guide plate 31 and the bottom of the base 1 form a guide cavity. A wedge-shaped diversion guide block 311 is provided on the outer sidewall of the guide plate 31 along the axial direction. The position of the wedge-shaped diversion guide block 311 corresponds to the external air inlet 11. The outer sidewall of the guide plate 31 located on both sides of the wedge-shaped diversion guide block 311 has several openings. Each of the flow guide windows 312 has an outer fan 313 that opens towards one side of the wedge-shaped diverting guide block 311. The outer fans 313 are all fixed to the side of the flow guide window 312 away from the wedge-shaped diverting guide block 311. The outer wall of the flow guide disk 31 also has the same number of arc-shaped baffles 314 as the flow guide windows 312. The arc-shaped baffles 314 have an S-shaped cross-section, with one end located at the bottom of the side of the flow guide window 312 without the outer fan 313, and the other end facing the wedge-shaped diverting guide block 311. The flow guide window 312 has an inner fan 315 on the inner wall of the flow guide disk 31, which is fixed to both sides of the flow guide window 312. All inner fans 315 have the same opening direction. The inner bottom of the guide plate 31 is provided with a concave annular groove 316, and a swirling drive ring 32 is assembled in the annular groove 316. The swirling drive ring 32 is a cylindrical structure. The swirling drive ring 32, the inner side wall of the guide plate 31, and the inner bottom of the guide plate 31 form a swirling cavity. Several drive guide vanes 321 are fixed to the outer wall of the swirling drive ring 32. Venturi flow holes 322 are provided on the outer wall of the swirling drive ring 32 between adjacent drive guide vanes 321. The Venturi flow holes 322 penetrate the side wall of the swirling drive ring 32. An outer axial guide vane assembly 33 is provided on the inner side of the swirling drive ring 32. An inner axial guide vane assembly 34 is provided on the inner side of the outer axial guide vane assembly 33. Both the guide vane assembly 33 and the inner axial guide vane assembly 34 include a blade root. The blade root 351 is a cylindrical structure. Several blades 352 are fixed to the outer wall of the blade root 351. The blade root 351 is provided with a through-hole 353 that penetrates the inside and outside. The bottom of the inner side of the guide plate 31 is provided with a concentric first slot 3171, a second slot 3172 and a third slot 3173. The first slot 3171 and the second slot respectively engage the blade roots 351 of the outer axial guide vane assembly 33 and the inner axial guide vane assembly 34. An orderly adjustment ejection structure 4 is assembled between the printing substrate 2 and the airflow diversion vortex structure 3. A self-cleaning filter structure 5 that communicates with the airflow diversion vortex structure 3 is provided on the outside of the base 1.The base 1 has an external air inlet 11 on its bottom side wall. A self-cleaning filter structure 5 is mounted on the external air inlet 11. The printing substrate 2 has several insert mounting holes 21 and several ejection through holes 22. The diameter of each insert mounting hole 21 is different to accommodate positioning inserts 23 of different sizes. Each insert mounting hole 21 has a limiting boss 211. The side wall of each positioning insert 23 has a limiting groove 231 corresponding to the limiting boss 211. Each positioning insert 23 has several supports. The support holes 232 of different positioning inserts 23 have different hole diameters, hole spacings, number of holes, and hole distribution patterns; the sequential adjustment ejection structure 4 includes a sequential ejection disc 41, which is located on the upper part of the guide plate 31. A fixed post 42 is fixedly connected to the center of the lower surface of the sequential ejection disc 41, and a rotating bearing 318 is fixedly connected to the third slot 3173. The top of the fixed post 42 is assembled in the rotating bearing 318. The upper surface of the sequential ejection disc 41 has a concentric ring array. The system includes a multi-layered sequential ejector ring 43, the height of which gradually decreases from the inside to the outside. The upper surface of the sequential ejector ring 43 is a continuously undulating cam surface 44. The upper part of the sequential adjustment ejector structure 4 is an ejector guide plate 45, and the ejector guide plate 45 has several guide holes 46 in the middle. The guide holes 46 are all projected onto the sequential ejector ring 43, and the guide holes 46 also correspond one-to-one with the ejector holes 22. Several ejector rings are provided between the sequential ejector disc 41 and the printing substrate 2. The ejector post 47 has one end in contact with the cam surface 44, and the other end passes through the guide hole 46 and is fitted into the ejector hole 22 of the printing substrate 2. The edge of the sequential ejector disk 41 is a gear ring structure 411, which is meshed with a bevel gear adjustment knob 412. The bevel gear adjustment knob 412 has an adjustment knob 413 that is coaxial with it and extends through the side wall of the base 1. Both the sequential ejector disk 41 and the ejector guide plate 45 are provided with through air guide grooves 48.

[0036] In this embodiment, by operating the bevel gear adjustment knob 412, the sequential ejection disk 41 can be rotated through gear transmission. The sequential ejection ring 43 rotates synchronously, and the ejection column 47 moves up and down reciprocally under force. Since the height of the sequential ejection ring 43 gradually decreases from the inside to the outside, the ejection stroke of the ejection column 47 at different positions is also different. This realizes a differentiated ejection process that gradually changes from the central area to the outer peripheral area, which is conducive to the smooth removal of the printed part from the printing substrate 2 and reduces local concentrated force. The air guide groove 48 of the sequential ejection disk 41 and the ejection guide plate 45 is conducive to the airflow from the airflow diversion vortex structure 3 passing upward through the air guide groove 48.

[0037] Example 7 The dynamic and static pressure equalization flow filtration 3D printing sequential part removal system provided in this embodiment, such as... Figure 1-6As shown, the system includes a base 1, which is a barrel-shaped structure with an open cavity at the top. A printing substrate 2 is mounted at the opening of the base 1. An airflow diversion and swirl guide structure 3 is mounted at the bottom of the base 1. The airflow diversion and swirl guide structure 3 includes a guide plate 31, which is a concave concentric frustum structure. The axial section of the sidewall of the guide plate 31 is T-shaped. The guide plate 31 is fixed to the bottom of the base 1. The sidewall of the guide plate 31 and the bottom of the base 1 form a guide cavity. A wedge-shaped diversion guide block 311 is provided on the outer sidewall of the guide plate 31 along the axial direction. The position of the wedge-shaped diversion guide block 311 corresponds to the external air inlet 11. Several guide windows 312 are opened on the outer sidewall of the guide plate 31 located on both sides of the wedge-shaped diversion guide block 311. Each flow guide window 312 is provided with an outer fan 313 that opens toward one side of the wedge-shaped diversion guide block 311. The outer fan 313 is fixed to the side of the flow guide window 312 away from the wedge-shaped diversion guide block 311. The outer wall of the flow guide disk 31 is also fixed with the same number of arc-shaped baffles 314 as the flow guide windows 312. The arc-shaped baffles 314 have an S-shaped cross-section. One end of the arc-shaped baffle 314 is located at the bottom of the side of the flow guide window 312 without the outer fan 313, and the other end faces the wedge-shaped diversion guide block 311. The flow guide window 312 is provided with an inner fan 315 on the inner wall of the flow guide disk 31. The inner fan 315 is fixed to both sides of the flow guide window 312. The opening direction of all inner fans 315 is the same. The bottom of the inner side of the flow guide disk 31 is provided with a concave annular sliding surface. The annular groove 316 contains a swirling drive ring 32, which is a cylindrical structure. The swirling drive ring 32, the inner wall of the guide plate 31, and the bottom of the inner side of the guide plate 31 form a swirling cavity. Several drive guide vanes 321 are fixed to the outer wall of the swirling drive ring 32. Venturi flow holes 322 are provided on the outer wall of the swirling drive ring 32 between adjacent drive guide vanes 321, penetrating the side wall of the swirling drive ring 32. An outer axial guide vane assembly 33 is provided inside the swirling drive ring 32, and an inner axial guide vane assembly 34 is provided inside the outer axial guide vane assembly 33. Both the outer axial guide vane assembly 33 and the inner axial guide vane assembly 34 include blade roots. The root 351 is a cylindrical structure, and several blades 352 are fixed to the outer wall of the root 351. The root 351 has a through-hole 353 that penetrates both inside and outside. The bottom inner side of the guide plate 31 has a concentric first slot 3171, a second slot 3172, and a third slot 3173. The first slot 3171 and the second slot respectively engage the root 351 of the outer axial guide vane group 33 and the inner axial guide vane group 34. An orderly adjustment ejection structure 4 is assembled between the printing substrate 2 and the airflow diversion vortex guide structure 3. A self-cleaning filter structure 5 is provided on the outer side of the base 1, and the self-cleaning filter structure 5 is connected to the airflow diversion vortex guide structure 3. An external air inlet 11 is provided at the bottom of the side wall of the base 1. Figure 7As shown, the self-cleaning filter structure 5 includes a cylindrical outer shell 51, inside which is an electrically heated porous metal filter element 52. Conductive electrode rings 53 are provided at both ends of the electrically heated porous metal filter element 52. A cold gas inlet 54 and a power terminal 55 are provided on the side wall of the cylindrical outer shell 51. One end of the cylindrical outer shell 51 is an end cap 56, and the other end is a filtered gas outlet 57, which connects to an external air inlet 11. The printed substrate 2 has several insert mounting holes 21 and several ejector through holes 22, each with a different diameter. The positioning inserts 23 are adapted to different sizes for assembly. Each insert mounting hole 21 is provided with a limiting boss 211, and each positioning insert 23 sidewall is provided with a limiting groove 231 corresponding to the limiting boss 211. Each positioning insert 23 has several support holes 232. The diameter, spacing, number of holes, and distribution of the support holes 232 of different positioning inserts 23 are different. The sequential adjustment ejection structure 4 includes a sequential ejection disc 41, which is located on the upper part of the guide disc 31. A fixing post 42 is fixedly connected to the center of the lower surface of the sequential ejection disc 41. The third slot 3173 is fixedly connected to a rotating bearing 318. The top of the fixed column 42 is assembled inside the rotating bearing 318. The upper surface of the sequential ejection disc 41 has a concentric array of multiple layers of sequential ejection rings 43. The height of the multiple layers of sequential ejection rings 43 gradually decreases from the inside to the outside. The upper surface of the sequential ejection rings 43 is a continuously undulating cam surface 44. The upper part of the sequential adjustment ejection structure 4 is an ejection guide plate 45. The ejection guide plate 45 has several guide through holes 46 in the middle. The guide through holes 46 are all projected onto the sequential ejection rings 43. The guide through holes 46 are also connected to the ejection through holes. 22 correspond one-to-one. A number of ejection posts 47 are provided between the sequential ejection disk 41 and the printing substrate 2. One end of the ejection post 47 contacts the cam surface 44, and the other end of the ejection post 47 passes through the ejection guide hole 46 and is assembled in the ejection through hole 22. The edge of the sequential ejection disk 41 is a gear ring structure 411. The gear ring structure 411 is meshed with a bevel gear adjustment knob 412. The bevel gear adjustment knob 412 is provided with an adjustment knob 413 that is coaxial with it and passes through the side wall of the base 1. Both the sequential ejection disk 41 and the ejection guide plate 45 are provided with through air guide grooves 48.

[0038] In this embodiment, after the external airflow enters the cylindrical shell 51 of the self-cleaning filter structure 5 through the cold gas inlet 54, it passes through the electrothermal porous metal filter element 52. During this process, particulate impurities in the airflow are intercepted and filtered by the electrothermal porous metal filter element 52. At the same time, since the electrothermal porous metal filter element 52 is energized and heated, the airflow flowing through it is heated synchronously. Furthermore, the heating of the electrothermal porous metal filter element 52 can thermally clean the particles attached to the surface and pores of the electrothermal porous metal filter element 52, thereby reducing the degree of clogging of the electrothermal porous metal filter element 52 and improving its continuous working capacity. The gas after being filtered and heated by the electrothermal porous metal filter element 52 is discharged from the filtered gas outlet 57 and enters the airflow diversion vortex structure 3 through the external air inlet 11 of the base 1.

[0039] Example 8 The part removal method of the 3D printing sequential part removal system proposed in this embodiment is as follows: Figure 8 As shown, it includes the following steps: S1 positioning insert 23 is selected and assembled; S2 airflow filtration and heat treatment; S3 airflow control; S4 printing complete, proceed with removal.

[0040] Example 9 The part removal method of the 3D printing sequential part removal system with dynamic and static pressure equalization and filtration proposed in this embodiment includes the following steps: S1 selects positioning insert 23 to be assembled on printing substrate 2 according to the size, shape and stress requirements of the part to be printed; Specifically, for small-sized and high-precision island-shaped components, such as single tooth crowns and micro bone screws, the bottom feature dimensions of such printed parts are usually less than 20mm, requiring extremely high local temperature control precision and dense flexible support. Therefore, a small positioning insert 23a with an outer diameter of 12mm is selected, and the diameter of the support hole 232 is 1mm. Nineteen support holes 232 are densely distributed on the small positioning insert 23a, which are distributed in a three-layer concentric ring array. The center-to-center distance between two adjacent layers of support holes 232 is 2.0mm. This high-density, small-diameter configuration can rapidly accelerate the airflow at the bottom, forming a high-speed micro-aerodynamic thermal pad at the bottom of the printed part, while providing dense physical support points to prevent the printed part from tilting in the early stage of printing. For medium-sized and complex stress-bearing components, such as customized joint pads and spinal fusion devices, the bottom feature dimensions of such printed parts are usually between 20mm and 80mm. The optimal balance between airflow heat conduction and solid mechanical support is required. Therefore, a medium-sized positioning insert 23b with an outer diameter of 20mm and a support hole 232 with a diameter of 2.0mm are selected. Thirteen support holes 232 are densely distributed on the medium-sized positioning insert 23b, which adopts a honeycomb hexagonal close-packed array. The center-to-center distance between two adjacent layers of support holes 232 is 3.5mm. This medium-density opening ratio ensures that a uniform stagnant jet field is obtained at the bottom of the printed part while retaining sufficient solid contact area to withstand the mechanical shear force during ejection and demolding. For large-area, thin-walled, or easily warped components, such as large-area cranioplasty mesh plates and pelvic reconstruction plates, the bottom span of these printed parts is typically greater than 80mm. Their edge areas dissipate heat extremely quickly, making them highly susceptible to thermal stress-induced warping and tearing during demolding. Therefore, multiple positioning inserts 23 covering the entire printed substrate 2 are required. A large positioning insert 23c with an outer diameter of 30mm is used directly beneath the printed part, and the support hole 232 has a diameter of 4.0mm. Nine support holes 232 are sparsely distributed on the large positioning insert 23c in a cross-shaped arrangement, with a center-to-center distance of 5.5 mm between adjacent support holes 232. Meanwhile, a holeless positioning insert 23d without support holes 232 is used on the outer edge of the printed part contour. This low-density opening ratio reduces the solid adhesion area between the printed part and the printing substrate 2, greatly reducing the pulling force during demolding and preventing the thin-walled part from breaking. At the same time, the holeless positioning insert 23d arranged on the outer edge of the printed part contour cuts off the airflow bypass, forcing the bottom layer dynamic and static pressure airflow to converge directly below the printed part, forming an inward-converging aerodynamic heat enclosure, effectively compensating for the temperature loss at the edge of the large-sized component. S2 activates the self-cleaning filter structure 5, allowing the airflow to complete filtration and heating before entering the base 1; S3 airflow is transported to the printing substrate 2 area by the airflow diversion and vortex guide structure 3 to form an upward airflow. After printing S4 is completed, the sequential adjustment ejection structure 4 is activated to smoothly separate the printed part from the printing substrate 2.

Claims

1. A 3D printing sequential part removal system with dynamic and static pressure equalization flow filtration, characterized in that, Includes a base (1), which is a barrel-shaped structure with an upper open cavity. A printing substrate (2) is installed at the opening of the base (1). An airflow diversion vortex structure (3) is installed at the bottom of the base (1). An orderly adjustment ejection structure (4) is installed between the printing substrate (2) and the airflow diversion vortex structure (3). A self-cleaning filter structure (5) communicating with the airflow diversion vortex structure (3) is provided on the outside of the base (1). Several positioning inserts (23) are installed on the printing substrate (2).

2. The 3D printing sequential part removal system with dynamic and static pressure equalization flow filtration according to claim 1, characterized in that, The base (1) has an external air inlet (11) at the bottom of its side wall. The self-cleaning filter structure (5) is mounted on the external air inlet (11). The printing substrate (2) has several insert mounting holes (21) and several ejector through holes (22). The diameter of each insert mounting hole (21) is different, and it is adapted to assemble positioning inserts (23) of different sizes. Each insert mounting hole (21) has a limiting boss (211). The side wall of each positioning insert (23) has a limiting groove (231) corresponding to the limiting boss (211). Some positioning inserts (23) have several support holes (232). The diameter, spacing, number of holes and distribution of the support holes (232) of different sizes of positioning inserts (23) are different.

3. The 3D printing sequential part removal system with dynamic and static pressure equalization and filtration according to claim 2, characterized in that, The airflow diversion swirl structure (3) includes a guide plate (31), which is a concave concentric frustum structure. The axial section of the side wall of the guide plate (31) is T-shaped. The guide plate (31) is fixed to the bottom of the base (1). The side wall of the guide plate (31) and the bottom of the base (1) form a guide cavity. The outer side wall of the guide plate (31) is provided with a wedge-shaped diversion guide block (311) along the axial direction. The position of the wedge-shaped diversion guide block (311) corresponds to the external air inlet (11). Several guide windows (312) are opened on the outer side wall of the guide plate (31) on both sides of the wedge-shaped diversion guide block (311). Each guide window (312) is provided with an opening towards the wedge-shaped diversion guide block (311). The outer fan (313) is fixedly connected to the side of the guide window (312) away from the wedge-shaped diversion guide block (311). The outer wall of the guide plate (31) is also fixedly connected with the same number of arc-shaped baffles (314) as the guide window (312). The cross-section of the arc-shaped baffles (314) is S-shaped. One end of the arc-shaped baffles (314) is located at the bottom of the side of the guide window (312) without the outer fan (313), and the other end faces the wedge-shaped diversion guide block (311). The guide window (312) has an inner fan (315) on the inner wall of the guide plate (31). The inner fan (315) is fixedly connected to both sides of the guide window (312). The opening direction of all the inner fans (315) is the same. The inner bottom of the guide plate (31) is provided with a concave annular groove (316), and a swirling drive ring (32) is assembled in the annular groove (316). The swirling drive ring (32) is a cylindrical structure. The swirling drive ring (32), the inner wall of the guide plate (31), and the inner bottom of the guide plate (31) form a swirling cavity. Several drive guide vanes (321) are fixed to the outer wall of the swirling drive ring (32). Venturi flow holes (322) are provided on the outer wall of the swirling drive ring (32) between adjacent drive guide vanes (321). The Venturi flow holes (322) penetrate the side wall of the swirling drive ring (32). An outer axial guide vane group (33) is provided on the inner side of the swirling drive ring (32). The outer axial guide vane group (33) is provided with an inner axial guide vane group (34) on the inner side. Both the outer axial guide vane group (33) and the inner axial guide vane group (34) include a blade root. The blade root (351) is a cylindrical structure. Several blades (352) are fixed to the outer wall of the blade root (351). The blade root (351) is provided with a flow hole (353) that penetrates through the inside and outside. The bottom of the inner side of the guide plate (31) is provided with a first slot (3171), a second slot (3172) and a third slot (3173) that are concentric. The first slot (3171) and the second slot respectively engage the blade roots (351) of the outer axial guide vane group (33) and the inner axial guide vane group (34).

4. The 3D printing sequential part removal system with dynamic and static pressure equalization flow filtration according to claim 3, characterized in that, When the opening direction of all inner fans (315) is clockwise, the drive guide vane (321) tends to tilt to the right, the blades (352) of the outer axial guide vane group (33) tend to tilt to the left, and the blades (352) of the inner axial guide vane group (34) tend to tilt to the right; when the opening direction of all inner fans (315) is counterclockwise, the drive guide vane (321) tends to tilt to the left, the blades (352) of the outer axial guide vane group (33) tend to tilt to the right, and the blades (352) of the inner axial guide vane group (34) tend to tilt to the left.

5. The 3D printing sequential part removal system with dynamic and static pressure equalization flow filtration according to claim 3, characterized in that, A baffle ring (36) is also provided between the inner wall of the guide plate (31) and the base (1). The baffle ring (36) is a cylindrical structure. The side wall of the baffle ring (36) is provided with an air inlet (361) and several airflow unloading grooves (362). The airflow unloading grooves (362) are slotted along the axial direction of the side wall of the baffle ring (36). The air inlet (361) corresponds to the external air inlet (11).

6. The 3D printing sequential part removal system with dynamic and static pressure equalization flow filtration according to claim 3, characterized in that, The sequential adjustment ejection structure (4) includes a sequential ejection disk (41), which is located on the upper part of the guide disk (31). A fixed post (42) is fixedly connected to the center of the lower surface of the sequential ejection disk (41), and a rotating bearing (318) is fixedly connected to the third slot (3173). The top of the fixed post (42) is assembled in the rotating bearing (318). The upper surface of the sequential ejection disk (41) has a concentric ring array of multiple layers of sequential ejection rings (43). The height of the multiple layers of sequential ejection rings (43) gradually decreases from the inside to the outside. The upper surface of the sequential ejection rings (43) is continuous. The undulating cam surface (44) and the upper part of the sequential adjustment ejection structure (4) are ejection guide plates (45). The ejection guide plates (45) are provided with several guide through holes (46) in the middle. The guide through holes (46) are all projected onto the sequential ejection ring (43). The guide through holes (46) also correspond one-to-one with the ejection through holes (22). Several ejection posts (47) are provided between the sequential ejection disk (41) and the printing substrate (2). One end of the ejection post (47) contacts the cam surface (44), and the other end of the ejection post (47) passes through the guide through hole (46) and is assembled in the ejection through hole (22).

7. The 3D printing sequential part removal system with dynamic and static pressure equalization flow filtration according to claim 6, characterized in that, The edge of the sequential ejection disc (41) is a gear ring structure (411), and the gear ring structure (411) is meshed with a bevel gear adjustment knob (412). The bevel gear adjustment knob (412) is provided with an adjustment knob (413) that is coaxial with it and passes through the side wall of the base (1). The sequential ejection disc (41) and the ejection guide plate (45) are both provided with through air guide grooves (48).

8. The 3D printing sequential part removal system with dynamic and static pressure equalization flow filtration according to claim 6, characterized in that, The self-cleaning filter structure (5) includes a cylindrical shell (51), an electrothermal porous metal filter element (52) is provided inside the cylindrical shell (51), conductive electrode rings (53) are provided at both ends of the electrothermal porous metal filter element (52), a cold gas inlet (54) and a power terminal (55) are provided on the side wall of the cylindrical shell (51), one end of the cylindrical shell (51) is an end cap (56), and the other end of the cylindrical shell (51) is a filtered gas outlet (57), which is connected to an external air inlet (11).

9. The part removal method of the 3D printing sequential part removal system with dynamic and static pressure equalization and filtration according to any one of claims 2-8, characterized in that, Includes the following steps: Select and assemble the S1 positioning insert (23); S2 airflow filtration and heat treatment; S3 airflow control; S4 printing complete, proceed with removal.

10. The part removal method of the 3D printing sequential part removal system with dynamic and static pressure equalization and filtration according to claim 9, characterized in that, The specific steps of S1 are as follows: Based on the size, shape and stress requirements of the part to be printed, select the positioning insert (23) and assemble it on the printing substrate (2); The specific steps of S2 are: activate the self-cleaning filter structure (5) so that the airflow can complete the filtration and heating process before entering the base (1); The specific steps of S3 are as follows: the airflow is transported to the printing substrate (2) area through the airflow diversion vortex guide structure (3) to form an upward airflow; The specific steps of S4 are as follows: After printing is completed, start the sequential adjustment ejection structure (4) to smoothly separate the printed part from the printing substrate (2).

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