A device for handling dust from 3D printers

Abstract

This invention discloses a dust treatment device for 3D printers, comprising a treatment box mounted on top of the printer and connected to it via a suction pipe. A fan is installed on the top of the treatment box. Two rollers are installed inside the treatment box, with a fabric strip wound around them. The bottom surface of the fabric strip has a magnetic strip attached to the outlet of the suction pipe. Two drive units are installed on the side wall of the treatment box, each capable of independently rotating one of the rollers. This invention utilizes the magnetic strip to attract metal powder, combined with the design of the fan and suction pipe, to efficiently capture and treat metal dust generated by 3D printers, especially ultrafine particles, thus improving dust treatment efficiency. The collection unit, through a scraper and a sealed electric push rod, can easily scrape off the attracted metal powder and collect it into the collection box for subsequent recycling, reducing resource waste.

Description

Technical Field

[0001] This utility model relates to the field of dust treatment technology, and in particular to a dust treatment device for 3D printers. Background Technology

[0002] 3D printing, a type of rapid prototyping technology, is a technique that uses digital model files as a basis and employs powdered metal or plastic and other bondable materials to construct objects layer by layer. This technology is widely used in mold making, industrial design and other fields to manufacture models, and is gradually expanding to the direct manufacturing of some products. In the process of metal 3D printing, a large number of fine metal particles are generated. Some of these particles solidify into shapes, while others may be dispersed with the circulating inert gas, forming dust. Specialized treatment equipment is required to handle this dust to avoid environmental pollution and harm to workers.

[0003] The applicant's research revealed that most current 3D printing metal powder handling devices rely on filtration and interception. However, these methods have limited efficiency in capturing ultrafine particles (such as those at the submicron level). These tiny particles easily penetrate the filter layer, affecting filtration effectiveness. Long-term accumulation can also clog the filter media, leading to decreased system performance and increased maintenance costs. Furthermore, the intercepted metal powder is often treated as waste, when in fact, it can be reused after proper processing, reducing resource waste. Existing devices lack sufficient design considerations for powder recycling and reuse, limiting the potential for resource recycling.

[0004] Therefore, the applicant proposes a device for handling dust from 3D printers to solve this problem. Utility Model Content

[0005] This invention provides a device for treating dust from 3D printers, which solves the problems mentioned in the background.

[0006] To solve the above-mentioned technical problems, this utility model provides a dust treatment device for 3D printers, including a treatment box, which is installed on the top of the printer and connected to it by a suction pipe. A fan is installed on the top of the treatment box. Two rollers are installed inside the treatment box, and a cloth tape is wound on both rollers. A magnetic strip is provided on the bottom surface of the cloth tape, and the magnetic strip is close to the outlet of the suction pipe. Two drive units that can individually drive one roller to rotate are installed on the side wall of the treatment box. A collection part is installed at the bottom of the treatment box below the cloth tape for collecting the metal powder adsorbed by the magnetic strip.

[0007] Preferably, the inner end of the cloth tape is provided with soft rubber strips on both sides of the magnetic strip. The thickness of the soft rubber strips is greater than that of the magnetic strip. The suction tube is a square tube, and the outlet is located on the inner side of the soft rubber strip. The outer edge of the soft rubber strip is aligned with the side of the cloth tape, and the soft rubber strip does not contact the sides of the square tube.

[0008] Preferably, a notch is provided at the outer corner of the top side of the suction pipe along the conveyor belt transport direction.

[0009] Preferably, the collection unit includes a sealing electric push rod installed at the bottom of the inside of the processing box. The sealing electric push rod has a card seat at the top. There are sliding grooves on both sides inside the card seat. A slider is inserted into the front of the sliding groove. The slider is fixed on both sides of the collection box. A positioning bolt is provided on one side of the card seat, which can be threadedly connected to itself and the slider at the same time. A scraper is installed on the top of the collection box.

[0010] Preferably, a rubber plate is fixed to the top of the scraper, the top of the rubber plate has notches on both sides, and the top of the rubber plate is attached to the bottom of the soft rubber strip and the magnetic strip.

[0011] Preferably, baffles are installed on the top of the processing box at adjacent ends on both sides of the scraper, and the inner sides of the two baffles are fixedly connected to the scraper and baffles. The baffles are also installed on the top of the processing box.

[0012] The inner side of baffle one is close to the edge of the fabric strip but does not touch it, and baffle two is close to the bottom of the soft rubber strip but does not touch it.

[0013] Preferably, the drive unit includes a motor mounted on the side wall of the processing box, the motor shaft is connected to a spline shaft one, a spline sleeve is sleeved and engaged on the spline shaft one, the spline sleeve can be engaged with a spline shaft two by translation, the spline shaft two is rotatably mounted on the side wall of the processing box and connected to the drum shaft, and the outer side of the spline shaft two and the outer wall of the spline sleeve are provided with connecting plates that can fit and be fixed by screws.

[0014] Compared with related technologies, the dust treatment device for 3D printers provided by this utility model has the following beneficial effects:

[0015] 1. This utility model uses a magnetic strip to adsorb metal powder, combined with a fan and a dust suction pipe design, to efficiently capture and process metal dust generated by 3D printers, especially ultrafine particles, thus improving dust handling efficiency. The collection part, through a scraper and a sealed electric push rod, can easily scrape off the adsorbed metal powder and collect it into the collection box, facilitating subsequent recycling and reducing resource waste.

[0016] 2. The drive unit of this utility model adopts a spline shaft and spline sleeve design, which can independently control the rotation of the drum, realize the winding and reverse winding of the fabric belt, facilitate dust adsorption and scraping operations, and improve the system flexibility and maintenance convenience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 2 Furthermore, the processing box is in a sectional view;

[0019] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 3 Furthermore, the processing box is in a sectional view;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the collecting part of this utility model. Figure 1 ;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the collecting part of this utility model. Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the side cross-sectional view of the drum of this utility model;

[0023] Figure 7 This is a side cross-sectional view of the vacuum tube of this utility model.

[0024] The following are the labels in the diagram: 1. Printer; 11. Processing box; 12. Fan; 13. Suction pipe; 14. Roll; 15. Fabric tape; 16. Magnetic tape; 17. Soft rubber strip; 2. Drive unit; 21. Motor; 22. Splined shaft one; 25. Splined sleeve; 23. Splined shaft two; 24. Connecting plate; 3. Collection unit; 31. Sealing electric actuator; 32. Collection box; 33. Scraper; 34. Rubber plate; 35. Card holder; 36. Slider; 37. Positioning pin; 38. Baffle one; 39. Baffle two. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Depend on Figures 1-6This invention provides a dust treatment device for a 3D printer, comprising a treatment box 11, which is installed on top of the printer 1 and connected to it via a suction pipe 13. A fan 12 is installed on the top of the treatment box 11. Two rollers 14 are installed inside the treatment box 11, with a cloth strip 15 wound around them. A magnetic strip 16 is provided on the bottom surface of the cloth strip 15 and is close to the outlet of the suction pipe 13. Two drive units 2 are installed on the side wall of the treatment box 11, each capable of rotating one of the rollers 14 independently. A collection unit 3 is installed at the bottom of the treatment box 11 below the cloth strip 15 for collecting the metal powder adsorbed by the magnetic strip 16. The magnetic strip 16 is a conventional design, for example, by adding magnetic powder to a rubber material, which can be wound and deformed.

[0027] With the above structural design, when printer 1 is working, the generated metal powder is sucked into processing box 11 through suction pipe 13. Fan 12 at the top of processing box 11 provides power to ensure smooth airflow, so that the metal powder can reach suction pipe outlet 13 and be removed. At this time, magnetic strip 16 on the bottom of the cloth belt is close to the suction pipe outlet 13. Using the principle of magnetic adsorption, the metal powder is firmly adsorbed onto magnetic strip 16. At the same time, when fan 12 is started, a drive unit 2 also works, driving a roller 14 to rotate (it can also rotate intermittently, without limitation), so as to slowly and evenly wind cloth belt 15, continuously bringing new magnetic strip area 16 close to suction pipe outlet 13, so that the adsorption efficiency is very high. At the same time, the adsorbed powder is wound onto the winding roller 14, thus completing the collection of metal powder with high efficiency.

[0028] The inner end of the cloth tape 15 is provided with soft rubber strips 17 on both sides of the magnetic tape 16. The thickness of the soft rubber strips 17 is greater than that of the magnetic tape 16. The suction tube 13 is a square tube, and the outlet is located on the inner side of the soft rubber strips 17. The outer edge of the soft rubber strips 17 is aligned with the side of the cloth tape 15. The soft rubber strips 17 do not contact the sides of the square tube.

[0029] See details Figure 6 The design of the soft rubber strip 17 ensures that the soft rubber strip 17 is thicker than the magnetic strip 16 and its outer edge is aligned with the side of the fabric strip 15. This ensures that the soft rubber strip 17 can act as a protective layer during the winding process of the fabric strip 15, reducing friction and pressure, and maintaining the flatness and service life of the fabric strip 154 ​​and the magnetic strip 16. In other words, during winding, the soft rubber strip 17 contacts the back of the fabric strip 15, instead of the magnetic strip 16 directly contacting the back of the fabric strip 15.

[0030] A notch is provided at the outer corner of the top side of the suction pipe 13 along the transport direction of the cloth belt 15 (for safe transport when adsorbing powder), and the bottom of the notch is designed to be inclined.

[0031] See details Figure 7The above design expands the opening area of ​​the suction tube 13 to a certain extent, which helps to reduce the airflow resistance generated during the suction process due to the small opening of the suction tube. This avoids unnecessary friction or wear between the top of the suction tube 13 and the cloth belt 15 due to excessive airflow pressure. Secondly, since the notch is set along the transport direction of the cloth belt 15 and the bottom is sloping, when the airflow flows out from the inside of the suction tube 13 through this notch, it will form a smooth airflow channel along the movement direction of the cloth belt 15, effectively guiding the metal powder from the suction tube 13 to the magnetic belt 16. Because the airflow is in the same direction as the movement of the cloth belt 15, the powder is more easily adsorbed on the surface of the moving magnetic belt 16, and the vibration of the cloth belt 15 caused by the airflow impact is reduced, so that the magnetic belt 16 can adsorb the powder more stably.

[0032] The collection unit 3 includes a sealing electric push rod 31 installed at the bottom of the inside of the processing box 11. A card seat 35 is installed on the top of the sealing electric push rod 31. There are grooves on both sides inside the card seat 35. A slider 36 is inserted into the front of the groove. The slider 36 is fixed on both sides of the collection box 32. A positioning bolt 37 is provided on one side of the card seat 35, which can be threadedly connected to itself and the slider 36 at the same time. A scraper 33 is installed on the top of the collection box 32. A rubber plate 34 is fixed on the top of the scraper 33. There are notches on both sides of the top of the rubber plate 34. The top of the rubber plate 34 is attached to the bottom of the soft rubber strip 17 and the magnetic strip 16.

[0033] With the design of the collection unit 3, after the work is completed, the collection box 32 is placed in the card holder 35, which is very convenient to slide via the slider 36, and then locked by the positioning bolt 37. At this time, the sealing electric push rod 31 moves the card holder 35 upward, so that the scraper 33 contacts the magnetic strip 16. Another drive unit 2 drives another drum 14 to rotate, performing reverse winding. As the drum 14 rotates in the reverse direction, the magnetic strip 16 begins to slowly retract from the processing area (the speed should not be too fast, but moderate to avoid powder flying). Through the contact of the scraper 33, the material on the magnetic strip 16 is effectively scraped off and collected. In the collection box 32, the rubber plate 34 further enhances the sealing and scraping effect, ensuring high collection efficiency. As the magnetic belt 16 continues to retract, more and more material is collected into the collection box 32. When the magnetic belt 16 is completely retracted and rewound back to the drum 14 at the starting position, the entire collection process is completed. At this time, the drive unit 2 can be turned off, and the card holder 35 and the collection box 32 on it can be slowly lowered back to the bottom of the processing box 11 by the sealing electric push rod 31. By loosening the positioning bolt 37, the collection box 32 full of material can be easily slid out of the card holder 35 for replacement or processing.

[0034] The top of the treatment box 11 is equipped with baffles 38 on both sides of the scraper 33. The inner sides of the two baffles 38 are fixedly connected to the scraper 33 and baffle 39. Baffle 39 is also installed on the top of the treatment box 11. The inner side of baffle 38 is close to the side of the cloth strip 15 but does not contact it. Baffle 39 is close to the bottom of the soft rubber strip 17 but does not contact it.

[0035] Furthermore, the protective effect of the collection can be improved by using baffle 2 39 and baffle 1 38. Even at a slow speed, a small amount of powder may float, so baffle 2 39 and baffle 1 38 can block it, ensuring the accuracy and efficiency of the collection process.

[0036] The drive unit 2 includes a motor 21 mounted on the side wall of the processing box 11. The motor shaft of the motor 21 is connected to a spline shaft 22. A spline sleeve 25 is sleeved and engaged on the spline shaft 22. The spline sleeve 25 can be engaged with a spline shaft 23 by translation. The spline shaft 23 is rotatably mounted on the side wall of the processing box 11 and connected to the rotating shaft of the drum 14. Two connecting discs 24 are provided on the outside of the spline shaft 23 and the outer wall of the spline sleeve 25, which can fit together and are fixed by screws.

[0037] Finally, through the design of the drive unit 2, when it is necessary to drive a certain roll 14 to rotate, the spline sleeve 25 on the spline shaft 1 22 is moved to the spline shaft 23. At this time, the two spline shafts and the spline sleeve 25 mesh together. Then, the two closely fitting connecting discs 24 are inserted through the screw threads, and the motor 21 is started. This makes it convenient to recycle the roll for dust adsorption and dust scraping.

[0038] Working Principle: When the 3D printer is working, the generated metal powder is sucked into the processing chamber 11 through the suction pipe 13. The fan 12 provides airflow power to ensure that the metal powder reaches the outlet of the suction pipe 13 smoothly. The magnetic strip 16 on the bottom surface of the fabric belt 15 is close to the outlet of the suction pipe 13, and the metal powder is firmly adsorbed onto the magnetic strip 16 using the principle of magnetic adsorption. At the same time, the drive unit 2 drives a roller 14 to rotate slowly, so that the fabric belt 15 is evenly wound, and new areas of the magnetic strip 16 are continuously brought close to the outlet of the suction pipe 13 to ensure efficient adsorption. The adsorbed metal powder is wound onto the roller 14 along with the fabric belt 15. After the work is completed, the drive unit 2 drives another roller 14 to rotate in the opposite direction, and the magnetic strip 16 is slowly retracted. The scraper 33 scrapes the powder on the magnetic strip 16 into the collection box 32, completing the collection. The design of the soft rubber strip 17, the first baffle 38, and the second baffle 39 reduces the friction of the fabric belt 15 and prevents the powder from flying, ensuring that the collection process is efficient and stable. The drive unit 2 achieves individual control of the drum 14 through the meshing design of the spline shaft and spline sleeve, which facilitates dust adsorption and scraping operations.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust treatment device for 3D printer, comprising a treatment box (11) installed on the top of the printer (1) and connected with the printer (1) through a dust suction pipe (13), and a fan (12) installed on the top of the treatment box (11), characterized in that: The processing box (11) has two rotatably installed inside, and a cloth strip (15) is wound on the same roller (14). A magnetic strip (16) is provided on the bottom surface of the cloth strip (15), and the magnetic strip (16) is close to the outlet of the suction pipe (13). The processing box (11) has two drive units (2) installed on its side wall, each capable of independently driving a drum (14) to rotate; The bottom of the processing box (11) is equipped with a collection part (3) below the cloth belt (15) for collecting the metal powder adsorbed by the magnetic strip (16).

2. The device for dust treatment of a 3D printer according to claim 1, characterized in that, The inner end of the cloth tape (15) is provided with soft rubber strips (17) on both sides of the magnetic strip (16). The thickness of the soft rubber strips (17) is greater than that of the magnetic strip (16). The suction tube (13) is a square tube, and the outlet is located on the inner side of the soft rubber strips (17). The outer edge of the soft rubber strips (17) is aligned with the side of the cloth tape (15). The soft rubber strips (17) do not contact the sides of the square tube.

3. A device for the treatment of dust from a 3D printer according to claim 2, characterized in that, The suction pipe (13) has a notch at the outer corner of one side of the top edge along the transport direction of the cloth belt (15).

4. The device for dust treatment of a 3D printer according to claim 2, characterized in that, The collection unit (3) includes a sealing electric push rod (31) installed at the bottom of the inside of the processing box (11). The sealing electric push rod (31) has a card seat (35) on the top. The card seat (35) has grooves on both sides inside. A slider (36) is inserted into the front of the groove. The slider (36) is fixed on both sides of the collection box (32). The card seat (35) has a positioning bolt (37) on one side that can be threadedly connected to itself and the slider (36) at the same time. A scraper (33) is installed on the top of the collection box (32).

5. A device for the treatment of dust from a 3D printer according to claim 4, characterized in that, A rubber plate (34) is fixed to the top of the scraper (33). The top of the rubber plate (34) has notches on both sides, and the top of the rubber plate (34) is attached to the bottom of the soft rubber strip (17) and the magnetic strip (16).

6. A device for the treatment of dust from a 3D printer according to claim 5, characterized in that, The processing box (11) has baffles (38) installed on the top of the scraper (33) at the adjacent ends on both sides. The inner sides of the two baffles (38) are fixedly connected to the scraper (33) and baffle (39). The baffle (39) is also installed on the top of the processing box (11). The inner side of baffle one (38) is close to the side of the cloth strip (15) but does not touch it, and the inner side of baffle two (39) is close to the bottom of the soft rubber strip (17) but does not touch it.

7. The device for dust treatment of a 3D printer according to claim 1, wherein, The drive unit (2) includes a motor (21) installed on the side wall of the processing box (11). The motor (21) shaft is connected to a spline shaft (22). A spline sleeve (25) is sleeved and engaged on the spline shaft (22). The spline sleeve (25) can be engaged with a spline shaft (23) by translation. The spline shaft (23) is rotatably installed on the side wall of the processing box (11) and connected to the rotating shaft of the drum (14). A connecting plate (24) is provided on the outside of the spline shaft (23) and the outer wall of the spline sleeve (25) to fit and be fixed by screws.

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