Dust filtering and recycling structure of a laser stereographic printing device
By introducing cleaning and filtration components into the laser 3D printing equipment, and utilizing the combination of cleaning brushes, vibrating motors, and stirring rods, the problems of low dust filtration efficiency and incomplete recovery are solved, achieving efficient dust filtration and recovery and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI PENGTAI PRECISE MOULD CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-06-02
AI Technical Summary
Existing laser 3D printing equipment suffers from inefficient dust filtration and recovery structures, with filters prone to clogging, requiring frequent manual cleaning and resulting in low dust recovery efficiency, which increases production costs.
The system employs a combined design of cleaning and filtration/recycling components, including a cleaning brush, a vibrating motor, an agitator, and a filter screen. The cleaning brush is driven by a motor to sweep away dust, the vibrating motor vibrates the filter screen, and the agitator stirs the dust, achieving dynamic filtration and efficient recycling.
It improves dust filtration efficiency, reduces filter clogging, lowers maintenance frequency and production costs, and ensures continuous equipment operation.
Smart Images
Figure CN224308068U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of laser 3D printing equipment, and in particular relates to a dust filtration and recovery structure for laser 3D printing equipment. Background Technology
[0002] In modern manufacturing, laser 3D printing technology, as an important branch of additive manufacturing, is widely used in high-end fields such as aerospace, medical devices, and automotive manufacturing due to its high precision and flexibility. This technology achieves three-dimensional solid construction by laser-sintering powder materials (such as metal powder and plastic powder) layer by layer. However, the printing process inevitably generates a large amount of suspended dust. If this dust is not treated effectively and promptly, it will not only pollute the working environment and endanger the health of operators, but also affect the precision and lifespan of the printing equipment, and even cause safety hazards such as dust explosions. Therefore, an efficient dust filtration and recovery system has become one of the core components of laser 3D printing equipment.
[0003] Currently, most laser 3D printing dust filtration and recovery devices on the market employ a single filter structure or a simple multi-stage filtration design. Traditional single-layer filters are prone to pore blockage due to dust accumulation during long-term use, leading to decreased filtration efficiency and requiring frequent shutdowns for manual cleaning, severely impacting production continuity. While some devices use a double-layer filter design, the lack of an effective linkage cleaning mechanism between the two layers makes static filtration insufficient for high-concentration dust environments. Furthermore, existing devices generally lack active stirring or vibration-assisted structures. Once dust forms a compacted layer on the filter surface, the recovery efficiency relying on gravity is extremely low, resulting in significant waste of reusable powder and increased production costs.
[0004] To address these issues, we provide a dust filtration and recovery structure for laser 3D printing equipment. Utility Model Content
[0005] The purpose of this invention is to provide a dust filtration and recovery structure for laser 3D printing equipment. By combining the cleaning component and the filtration and recovery component, the problem of low efficiency in the existing dust filtration and recovery structure is solved.
[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.
[0007] This utility model relates to a dust filtration and recovery structure for a laser 3D printing equipment. It includes a worktable, a cleaning assembly fixedly connected to the surface of the worktable, and filtration and recovery assemblies fixedly connected to both sides of the bottom of the worktable. Each cleaning assembly includes a cleaning brush that slides within the inner cavity of the worktable. A lead screw is threaded to one side of the cleaning brush, and a drive motor is fixedly connected to one end of the lead screw. A slide rod is slidably connected to the other side of the cleaning brush. The filtration and recovery assembly includes recovery boxes connected to both sides of the bottom of the worktable. Filter screens are fixedly connected to the upper and lower ends of the inner cavity of the recovery boxes via bolts. A stirring rod is located at the axial center of the inner cavity of the recovery box. The bottom of the stirring rod extends through to the bottom of the recovery box and is fixedly connected to a worm gear. A cleaning brush is fixedly connected to the surface of the stirring rod above the filter screen. A vibration motor is located at the bottom of the filter screen, and the bottom of the vibration motor is fixedly connected to the inner wall of the recovery box via a mounting base.
[0008] The present invention is further configured such that one side of the drive motor is fixedly connected to the surface of the worktable, and the other end of the lead screw is fixedly connected to a support plate through a bearing. One side of the support plate is fixedly connected to the surface of the worktable. The fixed design of the drive motor and the support plate ensures rigid support during lead screw transmission, avoids the decrease in the movement accuracy of the sweeping brush due to deformation under force, and improves the stability of the sweeping assembly.
[0009] The present invention is further configured such that both the front and rear ends of the slide rod are fixedly connected to the workbench surface through support plates, and the two ends of the slide rod are fixed to the workbench surface, providing a guide track parallel to the lead screw for the cleaning brush, preventing the cleaning brush from tilting during reciprocating motion, and ensuring the thoroughness of dust cleaning.
[0010] The present invention is further configured such that a feed inlet is provided on the top of the workbench, and a receiving groove is provided in the inner cavity of the feed inlet. The design of the feed inlet and the receiving groove on the top of the workbench facilitates the natural falling of dust generated during the printing process into the cleaning area, and the receiving groove can accommodate the sealing plate.
[0011] The present invention is further configured such that the filtration and recovery assembly includes an installation groove formed in the inner cavity of the receiving tank, an electric push rod is fixedly connected to the inner cavity of the installation groove, and a sealing plate is fixedly connected to the output shaft of the electric push rod. The cooperation between the electric push rod and the sealing plate can control the opening and closing of the feed inlet according to the cleaning rhythm, so as to avoid dust overflow during the filtration process, and at the same time, seal the cavity when the equipment is stopped to prevent dust leakage and environmental pollution.
[0012] The present invention is further configured such that the filtration and recovery assembly includes a fixed plate fixedly connected between the two recovery boxes, and a dual-output shaft motor is fixedly connected to the bottom of the fixed plate. Both ends of the dual-output shaft motor are fixedly connected to worm gears, which mesh with worm wheels. The dual-output shaft motor synchronously drives the stirring rods of the two recovery boxes through the worm gears and worm wheels, ensuring the coordinated operation of the left and right filtration assemblies, improving the consistency of filtration efficiency, and reducing energy consumption.
[0013] The present invention is further provided that the bottom of the filter screen is provided with a support ring, the support ring is fixedly connected to the inner wall of the recycling box, the support ring is fixed to the inner wall of the recycling box to provide rigid support for the filter screen, prevent the filter screen from deforming due to long-term vibration or dust accumulation, and extend the service life of the filter screen.
[0014] The present invention is further configured such that a guide plate is fixedly connected to the bottom of the inner cavity of the recycling bin, the stirring rod is fixedly connected to the inner wall of the recycling bin through a bearing, a cleaning port is opened on the surface of the recycling bin, and a sealing door is movably connected to the inner cavity of the cleaning port through a hinge. The guide plate is inclinedly set at the bottom of the recycling bin to guide the filtered dust to gather towards the cleaning port for easy centralized collection. The sealing door is connected by a hinge for convenient periodic cleaning of waste in the recycling bin and easy maintenance.
[0015] The present invention has the following beneficial effects.
[0016] 1. This utility model uses a drive motor to rotate a lead screw, causing a cleaning brush to slide along a sliding rod. This allows residual dust from the printing process to be promptly swept to the filter recovery assembly below, preventing dust accumulation on the worktable and affecting printing accuracy. The double-layer filter screen within the filter recovery assembly, in conjunction with the cleaning brush and vibration motor, achieves dynamic filtration and cleaning. The cleaning brush on the stirring rod rotates with the stirring rod, continuously cleaning dust from the filter screen surface and preventing clogging of the filter screen pores. The vibration motor applies high-frequency vibration to the filter screen, causing the fine dust adhering to the filter screen to fall off more quickly. This solves the problem of dust compaction and filter screen clogging that leads to decreased efficiency in traditional static filtration. This structure eliminates the need for frequent manual shutdowns for cleaning, significantly improving the equipment's continuous operation capability and reducing maintenance costs.
[0017] 2. This utility model achieves synchronous rotation of the stirring rod and cleaning brush through a worm gear transmission mechanism. The dual-output shaft motor drives the worm to mesh with the worm wheel, which in turn drives the stirring rod to stir the dust between the two layers of filter screens. This breaks up the compacted layer of dust accumulation, allowing dust of different particle sizes to pass through the filter screen more easily under the action of gravity and airflow. The guide plate at the bottom of the recovery box guides the filtered dust to the discharge port for easy collection and reuse. The synergistic effect of the vibration motor and the stirring rod not only enhances the dust removal effect on the filter screen surface, but also makes the dust evenly distributed through stirring, reducing local clogging of the filter screen and effectively reducing raw material waste and production costs. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.
[0019] Fig. 1 This is a three-dimensional diagram of a dust filtration and recovery structure for a laser 3D printing device.
[0020] Fig. 2 This is a rear-view stereoscopic diagram of a dust filtration and recovery structure for a laser stereoprinting device.
[0021] Fig. 3 This is a cross-sectional schematic diagram of a dust filtration and recovery structure for a laser 3D printing device.
[0022] Fig. 4 This is a top-view cross-sectional schematic diagram of a dust filtration and recovery structure for a laser 3D printing device.
[0023] Fig. 5 This is a top view schematic diagram of the connection structure between the filter screen and the stirring rod in a dust filtration and recovery structure of a laser 3D printing equipment.
[0024] Fig. 6 This is a bottom view schematic diagram of the connection structure between the filter screen and the stirring rod in a dust filtration and recovery structure of a laser 3D printing equipment.
[0025] In the attached diagram: 1. Workbench; 2. Cleaning assembly; 21. Cleaning brush; 22. Lead screw; 23. Drive motor; 24. Slide rod; 3. Filter and recovery assembly; 31. Recovery box; 32. Filter screen; 33. Stirring rod; 34. Worm gear; 35. Cleaning brush; 36. Vibration motor; 37. Electric push rod; 38. Sealing plate; 39. Dual output shaft motor; 310. Worm gear; 311. Guide plate; 312. Sealing door. Detailed Implementation
[0026] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0027] Example 1
[0028] Please see Figs. 1-6This utility model relates to a dust filtration and recovery structure for a laser 3D printing equipment. It includes a workbench 1, a cleaning assembly 2 fixedly connected to the surface of the workbench 1, and filtration and recovery assemblies 3 fixedly connected to both sides of the bottom of the workbench 1. The cleaning assembly 2 includes a cleaning brush 21 that slides within the inner cavity of the workbench 1. A lead screw 22 is threadedly connected to one side of the cleaning brush 21, and a drive motor 23 is fixedly connected to one end of the lead screw 22. A slide rod 24 is slidably connected to the other side of the cleaning brush 21. The filtration and recovery assembly 3 includes recovery boxes 31 connected to both sides of the bottom of the workbench 1. A filter screen 32 is fixedly connected to the upper and lower ends of the inner cavity of the recovery box 31 by bolts. A stirring rod 33 is provided at the axial center of the inner cavity of the recovery box 31. The bottom of the stirring rod 33 extends through to the bottom of the recovery box 31 and is fixedly connected to a worm gear 34. A cleaning brush 35 is fixedly connected to the surface of the stirring rod 33 and above the filter screen 32. A vibration motor 36 is provided at the bottom of the filter screen 32, and the bottom of the vibration motor 36 is fixedly connected to the inner wall of the recovery box 31 via a mounting base.
[0029] Specifically: the filter screen 32 has a larger aperture at the top and a smaller aperture at the bottom, forming a double-layer filtration structure. The stirring rod 33 at the center of the recovery box 31 passes through both layers of filter screen 32, and its bottom end extends to the outside of the recovery box 31 and is fixedly connected to the worm gear 34. The cleaning brush 35 set at the top is in close contact with the upper surface of the filter screen 32. Vibration motors 36 are installed below both layers of filter screen 32, and the vibration direction is perpendicular to the surface of the filter screen 32. The stirring rod 33 is connected to the inner wall of the recovery box 31 through bearings to ensure coaxiality during rotation. The worm gear 34 meshes with the external worm 310 to form a transmission connection.
[0030] Example 2
[0031] Please see Figs. 1-6Based on Embodiment 1, one side of the drive motor 23 is fixedly connected to the surface of the worktable 1, and the other end of the lead screw 22 is fixedly connected to a support plate via a bearing. One side of the support plate is fixedly connected to the surface of the worktable 1. Both ends of the slide rod 24 are fixedly connected to the surface of the worktable 1 via support plates. A feed inlet is provided at the top of the worktable 1, and a receiving groove is provided in the inner cavity of the feed inlet. The filter recovery assembly 3 also includes an installation groove provided in the inner cavity of the receiving groove. An electric push rod 37 is fixedly connected to the inner cavity of the installation groove, and a sealing plate 38 is fixedly connected to the output shaft of the electric push rod 37. Component 3 also includes a fixing plate fixedly connected between the two recycling bins 31. A dual-output shaft motor 39 is fixedly connected to the bottom of the fixing plate. Both ends of the dual-output shaft motor 39 are fixedly connected to worm gears 310. The worm gears 310 mesh with worm wheels 34. A support ring is provided at the bottom of the filter screen 32. The support ring is fixedly connected to the inner wall of the recycling bin 31. A guide plate 311 is fixedly connected to the bottom of the inner cavity of the recycling bin 31. The stirring rod 33 is fixedly connected to the inner wall of the recycling bin 31 through a bearing. A cleaning port is opened on the surface of the recycling bin 31. A sealing door 312 is movably connected to the inner cavity of the cleaning port through a hinge.
[0032] Specifically: The fixed design of the drive motor 23 and the support plate ensures rigid support during the transmission of the lead screw 22, preventing the cleaning brush 21 from losing its motion accuracy due to deformation under stress, and improving the stability of the cleaning assembly 2. The two ends of the slide rod 24 are fixed to the surface of the worktable 1, providing a guide rail for the cleaning brush 21 parallel to the lead screw 22, preventing the cleaning brush 21 from tilting during reciprocating motion, and ensuring thorough dust cleaning. The design of the feed inlet and receiving slot at the top of the worktable 1 facilitates the natural falling of dust generated during the printing process into the cleaning area. The receiving slot can accommodate the sealing plate 38. The cooperation between the electric push rod 37 and the sealing plate 38 can control the opening and closing of the feed inlet according to the cleaning rhythm, preventing dust from overflowing during the filtration process. Meanwhile, the sealed cavity prevents dust leakage and environmental pollution when the equipment is stopped. The dual-output shaft motor 39 synchronously drives the stirring rods 33 of the two recycling boxes 31 through the worm gear 310 and worm wheel 34, ensuring the coordinated operation of the left and right filter components, improving the consistency of filtration efficiency, and reducing energy consumption. The support ring is fixed to the inner wall of the recycling box 31 to provide rigid support for the filter screen 32, preventing the filter screen 32 from deforming due to long-term vibration or dust accumulation, and extending the service life of the filter screen 32. The guide plate 311 is inclined at the bottom of the recycling box 31 to guide the filtered dust to the cleaning port for centralized collection. The sealing door 312 is connected by a hinge, which facilitates regular cleaning of waste in the recycling box 31 and makes maintenance convenient.
[0033] The working principle of this utility model is as follows: After the drive motor 23 starts, it drives the lead screw 22 to rotate, causing the cleaning brush 21 to slide back and forth along the slide bar 24, sweeping the dust into the recycling box 31 at the bottom of the workbench 1. Then, the electric push rod 37 is started to move the sealing plate 38 to seal the feed port. The dust first passes through the upper filter screen 32, where larger particles are intercepted and fine particles fall through the mesh. The dual output shaft motor 39 drives the worm gear 310 to rotate, and the meshing worm wheel 34 drives the stirring rod 33 to rotate, so that the cleaning brush 35 continuously cleans the surface of the filter screen 32. At the same time, the stirring rod 33 turns the dust between the two filter screens, breaking the compacted layer. The vibrating motor 36 vibrates the filter screen 32 at high frequency, causing the attached fine dust to fall faster. Finally, the dust is collected at the bottom of the recycling box 31 through the guide plate 311. The filtered recyclable powder is collected and reused through the guide plate 311, while impurities are cleaned periodically through the sealing door 312, realizing efficient dust filtration and recycling.
[0034] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.
Claims
1. A dust filtration and recovery structure for a laser 3D printing equipment, comprising a worktable (1), characterized in that: A cleaning assembly (2) is fixedly connected to the surface of the workbench (1), and a filter recovery assembly (3) is fixedly connected to both sides of the bottom of the workbench (1). The cleaning assembly (2) includes a cleaning brush (21) that slides in the inner cavity of the worktable (1). A lead screw (22) is threadedly connected to one side of the cleaning brush (21). A drive motor (23) is fixedly connected to one end of the lead screw (22). A slide rod (24) is slidably connected to the other side of the cleaning brush (21). The filter and recycling assembly (3) includes a recycling box (31) connected to both sides of the bottom of the workbench (1). The upper and lower ends of the inner cavity of the recycling box (31) are fixedly connected to a filter screen (32) by bolts. A stirring rod (33) is provided at the center of the inner cavity of the recycling box (31). The bottom of the stirring rod (33) extends through to the bottom of the recycling box (31) and is fixedly connected to a worm gear (34). A cleaning brush (35) is fixedly connected to the surface of the stirring rod (33) and above the filter screen (32). A vibration motor (36) is provided at the bottom of the filter screen (32). The bottom of the vibration motor (36) is fixedly connected to the inner wall of the recycling box (31) by a mounting base.
2. The dust filtration and recovery structure for laser 3D printing equipment according to claim 1, characterized in that: One side of the drive motor (23) is fixedly connected to the surface of the worktable (1), and the other end of the lead screw (22) is fixedly connected to a support plate through a bearing. One side of the support plate is fixedly connected to the surface of the worktable (1).
3. The dust filtration and recovery structure for laser 3D printing equipment according to claim 2, characterized in that: Both ends of the slide bar (24) are fixedly connected to the surface of the workbench (1) through support plates.
4. The dust filtration and recovery structure for laser 3D printing equipment according to claim 1, characterized in that: The top of the workbench (1) is provided with a feed inlet, and the inner cavity of the feed inlet is provided with a receiving groove.
5. The dust filtration and recovery structure for laser 3D printing equipment according to claim 4, characterized in that: The filter recovery assembly (3) also includes an installation groove formed in the inner cavity of the receiving tank. An electric push rod (37) is fixedly connected to the inner cavity of the installation groove, and a sealing plate (38) is fixedly connected to the output shaft of the electric push rod (37).
6. The dust filtration and recovery structure for laser 3D printing equipment according to claim 1, characterized in that: The filter recovery assembly (3) also includes a fixed plate fixedly connected between the two recovery boxes (31). A dual-output shaft motor (39) is fixedly connected to the bottom of the fixed plate. Both ends of the dual-output shaft motor (39) are fixedly connected to worm gears (310), which mesh with worm wheels (34).
7. The dust filtration and recovery structure for laser 3D printing equipment according to claim 1, characterized in that: The bottom of the filter screen (32) is provided with a support ring, which is fixedly connected to the inner wall of the recycling box (31).
8. The dust filtration and recovery structure for laser 3D printing equipment according to claim 1, characterized in that: A guide plate (311) is fixedly connected to the bottom of the inner cavity of the recycling box (31), and the stirring rod (33) is fixedly connected to the inner wall of the recycling box (31) through a bearing. A cleaning port is opened on the surface of the recycling box (31), and a sealing door (312) is movably connected to the inner cavity of the cleaning port through a hinge.