Dust recovery mechanism, 3D printing equipment and dust collection method

Abstract

The invention relates to the field of 3D printing, and discloses a dust recovery mechanism, 3D printing equipment and a dust collection method. The dust recycling mechanism comprises a dust falling groove and an air supply piece. The powder falling groove is in sealed connection with the bottom end of the forming shell, the forming platform can descend into the powder falling groove and be collected by the powder falling groove, the air supply piece is arranged on the inner side of the powder falling groove, detachably connected with the inner wall of the powder falling groove and used for supplying air to the forming platform, and dust can successfully fall into the powder falling groove. And dust collection work can be conducted below a forming area, interference with a forming mechanism is avoided, the forming area can be isolated from dust, and the situation that the dust pollutes the external environment after a bin door is opened is avoided.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing, and in particular to a dust recovery mechanism, a 3D printing device and a dust collection method. Background Art

[0002] The existing metal 3D printing technology mainly involves first spreading a very thin layer of metal dust on the printing platform, and then scanning the high-energy laser beam according to the pre-designed model cross-sectional shape to completely melt the metal dust and solidify it, and then spreading another layer of dust, and repeating this process until the entire model is formed. When printing is completed, some metal dust will remain on the surface and inside of the model, and the staff needs to clean the dust in the printing cabin. When cleaning the dust on the printing platform, in general, the staff will remove the dust by vacuuming with a handheld vacuum cleaner, sweeping with a brush, etc., but manual dust removal requires the cabin door to be opened to clean the dust on the printing platform.

[0003] At present, there are some dust recovery mechanisms, which are arranged in the molding area of ​​3D printing equipment. The door is arranged on the molding bin. The molding bin and the locked door together form a molding area. In the molding area, the blowing component and the suction component are arranged on the upper part of the molding platform to collect dust and clean the product. However, since the molding area is close to the door, after the molding platform is cleaned, some residual dust that cannot be completely cleaned by the dust recovery mechanism will still diffuse in the molding area. After opening the door, dust diffused in the molding area will overflow into the external environment, polluting the external environment. Air will also enter the bin and react with the residual dust to pollute the dust, making the dust unable to be recycled.

[0004] Therefore, there is an urgent need for a dust recovery mechanism that can solve the problem of dust overflow after dust recovery and opening the warehouse door, so as to avoid dust pollution of the external environment. Summary of the invention

[0005] The object of the present invention is to provide a dust recovery mechanism, which can solve the problem of dust overflow after the dust is recovered and the bin door is opened, thereby avoiding the occurrence of dust pollution of the external environment.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] A dust recovery mechanism is used in a 3D printing device, the 3D printing device includes a molding platform and a molding shell, the molding platform can carry printed products, the molding platform is liftably sealed and arranged in the molding shell, and the dust recovery mechanism includes:

[0008] A powder dropping groove is sealed and connected to the bottom end of the molding shell, and the molding platform can be lowered into the powder dropping groove;

[0009] An air supply member is arranged at the inner side of the powder dropping groove and is used to supply air to the forming platform so that the dust falls into the powder dropping groove.

[0010] As an optional solution of the dust recovery mechanism, the air supply member is an annular air supply member, and the air supply member is used to blow air toward the forming platform along the circumference of the forming platform.

[0011] As an optional solution of the dust recovery mechanism, the bottom surface of the air supply member is a first air outlet surface, the first air outlet surface is located above the forming platform, and the vertical projection of the first air outlet surface is located at the edge of the forming platform;

[0012] And / or, the inner annular surface of the annular air supply member is a second air outlet surface, and the second air outlet surface is located on the circumferential outer side of the forming platform.

[0013] As an optional solution of the dust recovery mechanism, the dust recovery mechanism also includes a dust collecting piece, which is connected to the powder falling trough and is used to collect the dust in the powder falling trough.

[0014] As an optional solution of the dust recovery mechanism, the dust recovery mechanism further includes a filter assembly, and the filter assembly includes:

[0015] A collecting shell, connected to the dust collecting member, for storing the dust, and provided with an exhaust port;

[0016] The filter element is arranged in the collecting shell and is used for filtering the dust gas sucked by the dust collecting element.

[0017] As an optional solution of the dust recovery mechanism, the dust recovery mechanism further includes a first quick-release assembly, and the powder falling trough and the dust collecting member are sealed and connected via the first quick-release assembly;

[0018] And / or, the dust recovery mechanism further includes a second quick-release assembly, and the dust collecting component and the filter assembly are sealedly connected via the second quick-release assembly.

[0019] As an optional solution of the dust recovery mechanism, the circumferential edge of the forming platform is spaced apart from the inner wall of the powder dropping groove to form a powder dropping gap.

[0020] A 3D printing device comprises a molding shell, a molding platform, a lifting unit and a dust recovery mechanism. The molding shell is sealed and connected to the dust recovery mechanism, and the lifting unit is used to drive the molding platform to lift.

[0021] As an optional solution of the 3D printing device, the molding shell includes a molding bin, a first isolation member and a molding cylinder connected from top to bottom, the first isolation member is sealedly connected to the molding cylinder, and the first isolation member is movably connected to the molding bin;

[0022] And / or, two opposite sides of the molded shell are respectively connected to a first air inlet member and a first air outlet member.

[0023] A dust collection method, using a 3D printing device, the dust collection method comprises the following steps:

[0024] S1. After the product is formed, the lifting unit drives the forming platform to descend into the powder dropping groove below the forming shell;

[0025] S2, the air supply member blows air toward the forming platform to blow off the dust on the forming platform and collect it in the powder dropping trough;

[0026] S3, after the dust is collected in the powder dropping trough, the lifting unit drives the molding platform to rise to a preset height for taking the molding platform out of the molding shell;

[0027] S4, taking the forming platform out of the forming shell.

[0028] The beneficial effects of the present invention are:

[0029] The present invention proposes a dust recovery mechanism, in which a powder falling trough is sealed and connected to the bottom end of a molding shell, a molding platform can be lowered into the powder falling trough and collected by the powder falling trough, an air supply member is arranged on the inner side of the powder falling trough and is detachably connected to the inner wall of the powder falling trough, and the air supply member is used to supply air to the molding platform, so that dust can successfully fall into the powder falling trough, so that dust collection work can be carried out below the molding area to avoid interference with the molding mechanism, and the molding bin can be isolated from the dust to avoid dust polluting the external environment after the bin door is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a first structural schematic diagram of a 3D printing device provided by an embodiment of the present invention;

[0031] Figure 2 It is a first structural schematic diagram of a dust recovery mechanism provided by the background technology of the present invention;

[0032] Figure 3 is a first structural schematic diagram of an annular air supply member provided in an embodiment of the present invention;

[0033] Figure 4 is a second structural schematic diagram of the annular air supply member provided in an embodiment of the present invention;

[0034] Figure 5 3D printing device provided by an embodiment of the present invention.

[0035] In the figure:

[0036] 1. Dust recovery mechanism; 11. Powder drop trough; 12. Air supply member; 121. First air outlet; 122. First air outlet surface; 123. Second air outlet surface; 124. First air supply cavity; 125. Second air supply cavity; 13. Dust collecting member; 14. Filter assembly; 15. First quick-release assembly; 16. Second quick-release assembly; 17. First sealing member;

[0037] 2. Molding mechanism; 21. Molding platform; 22. Molding shell; 221. Molding bin; 222. First isolating member; 223. Molding cylinder; 23. Lifting unit; 231. Lifting member; 232. Protective member. DETAILED DESCRIPTION

[0038] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0043] This embodiment provides a 3D printing device, which can be applied to aerospace, automotive, medical, energy and other fields to manufacture high-precision and high-complexity parts in these fields.

[0044] like Figure 1-Figure 2 As shown, the 3D printing device includes a molding mechanism 2 and a printing mechanism. The molding mechanism 2 encloses a molding area for printing work, and the printing mechanism is arranged in the molding mechanism 2. The molding mechanism 2 includes a molding platform 21, a molding shell 22, a lifting unit 23 and a warehouse door. The molding platform 21 can carry the printed product. The molding shell 22 is arranged around the outer periphery of the molding platform 21, and can protect the structure inside the molding shell 22. The molding platform 21 is sealed and can be lifted and lowered in the molding shell 22. The molding platform 21 is connected to the lifting unit 23, and the lifting unit 23 can drive the molding platform 21 to lift and lower. A take-in and put-out port is opened on the molding shell 22, and the molding shell 22 cooperates with the warehouse door. When the molding shell 22 and the warehouse door are relatively closed, the molding area is a relatively closed space, and the 3D printing device can perform printing work. When the molding shell 22 and the warehouse door are relatively opened, the product can be taken out from the take-in and put-out port; when the printing mechanism performs printing work, a lot of dust will be generated on the molding platform 21, which affects the removal of the product from the molding shell 22.

[0045] It should be noted here that the printing mechanism is an existing structure, and setting up a printing mechanism in a 3D printing device is a conventional setting in the field. In this embodiment, any method in the prior art can be used to set it in the molding area enclosed by the molding mechanism 2. As long as the 3D printing function is realized, it will not be described in detail.

[0046] In order to clean the dust on the forming platform 21, in general, the staff will remove the dust by means of handheld vacuum cleaners, brush cleaning, etc. However, manual dust removal requires opening the door to clean the dust on the printing platform. Once the door is opened, the dust in the powder cleaning area will overflow the 3D printing equipment and pollute the external environment. By arranging both the blowing component and the suction component on the upper part of the forming platform 21 to collect and clean the product, because the forming area is close to the door, after the forming platform 21 is cleaned, some residual dust that cannot be completely cleaned by the dust recovery mechanism 1 will remain The old dust is diffused in the molding area. After the door is opened, the dust diffused in the molding area will overflow into the external environment, polluting the external environment. Air will also enter the warehouse and react with the residual dust to pollute the dust, making it impossible to recycle the dust. Since more dust is generated in the process of 3D printing, the suction component needs to inhale a large proportion of gas and dust at the same time through the cooperation between the blowing component and the suction component. Therefore, the powder suction efficiency of the suction component is low. At the same time, the powder cleaning mechanism set in the molding area is also easy to interfere with the printing mechanism. In the narrow molding area, it is also extremely inconvenient to clean the powder on the molding platform.

[0047] In order to reduce the diffusion of dust in the molding area, and thus solve the problem of dust overflow after the dust is recovered and the door is opened, such as Figure 1As shown, in this embodiment, the 3D printing device also includes a dust recovery mechanism 1. The dust recovery mechanism 1 includes a powder falling trough 11 and an air supply member 12. The powder falling trough 11 is sealed and connected to the bottom end of the molding shell 22. The molding platform 21 can be lowered into the powder falling trough 11. The air supply member 12 is arranged on the inner side of the powder falling trough 11. The air supply member 12 is used to supply air to the molding platform 21 so that the dust falls into the powder falling trough 11, so that the dust collection process of the dust cleaning machine is completed in the molding area or even below the molding mechanism 2, so that the molding area will not be filled with dust due to dust cleaning and dust collection, thereby avoiding dust overflow and pollution to the external environment; since the powder falling trough 11 is arranged at the bottom of the molding area, the powder falls to the powder falling trough 11 through the air supply member 12 and free fall motion, so that a larger volume of powder can be collected in a shorter time, which improves the efficiency of the molding process. The dust recovery efficiency of the dust recovery mechanism is improved; at the same time, the dust recovery mechanism is arranged at the bottom of the molding area to avoid interference with the printing mechanism; the air flow blown by the air supply member 12 to the molding platform 21 has a smaller force on the molding platform 21 and the products thereon than that of manual dust removal. When the air supply member 12 blows the dust to the edge of the molding platform 21, the dust can automatically fall off from the molding platform 21, reducing the collision with the molding platform 21 and the product during the dust recovery process, thereby reducing the risk of damage to the product on the molding platform 21; the above-mentioned arrangement also makes it unnecessary for the 3D printing equipment to perform cylinder moving operations, reducing a series of complex steps such as moving and loading and unloading the molding shell 22, and the operator only needs to clean or maintain the dust recovery mechanism 1 regularly, reducing the difficulty of operation and labor intensity.

[0048] Preferably, in this embodiment, the air supply member 12 is detachably connected to the inner wall of the powder dropping groove 11, so that when cleaning different types of dust, air supply members 12 of different specifications or types can be more easily installed on the inner wall of the powder dropping groove 11 or more easily removed from the inner wall of the powder dropping groove 11. At the same time, maintenance or maintenance personnel can disassemble and install the air supply member 12 from the inner wall of the powder dropping groove 11 at any time, which can facilitate maintenance personnel to perform maintenance on the powder dropping groove 11 or the air supply member 12.

[0049] Specifically, Figure 2-Figure 4As shown, in the present embodiment, the air supply member 12 is an annular air supply member 12, and the air supply member 12 is used to blow air toward the molding platform 21 along the circumference of the molding platform 21, and the annular air outlet member is used to blow air toward the molding platform 21 along the circumference of the powder dropping groove 11. The annular air outlet member can provide a uniform 360° annular airflow, so as to achieve blowing to the molding platform 21 without dead angles, and thus can blow away the dust on the molding platform 21 in all directions, so that a larger area of ​​the molding platform 21 can be cleaned. Since the wind blown out by the annular air outlet member will form an annular airflow field in the space, the dust in the four corners will be affected by the airflow field and be drawn into the circulation of the airflow, and move with the airflow, so that the dust is blown away from the original position, and then the dust is more likely to fall from the molding platform 21 to the powder dropping groove 11, thereby achieving the cleaning and collection of the dust.

[0050] Preferably, if Figure 2-Figure 4 As shown, in this embodiment, the air outlet is an annular air knife, and the annular structure of the annular air knife can generate a stable and powerful airflow. The airflow is ejected from the bottom surface of the annular structure, forming a low-pressure area at the center of the annular structure, forcing a large amount of surrounding air to flow to the center of the annular structure together with the airflow blown out by the high pressure. When these airflows move away, a powerful conical annular airflow will be formed, which will continuously and stably blow the dust, efficiently lift the dust on the molding platform 21, and make it easier for the dust to fall from the molding platform 21. In other embodiments, the air outlet can also be a fan arranged circumferentially along the inner wall of the powder drop groove 11, as long as it can achieve a larger range of dust cleaning on the molding platform 21.

[0051] Specifically, Figure 2-Figure 4 As shown, in the present embodiment, at least two first air outlets 121 are provided on the air outlet member, and at least two first air outlets 121 are arranged at intervals along the circumference of the air outlet member. Gas can be blown out from multiple points arranged along the circumference at the same time, thereby forming a circumferential airflow. When the circumferential airflow is generated, the airflow will diffuse in a circular direction. Compared with the airflow in a single direction, the circumferential airflow can cover a wider area, so that the air outlet member can avoid missing dust and can comprehensively clean the dust.

[0052] Optionally, the inner annular surface of the air outlet member is the first air outlet surface 122, the first air outlet 121 is arranged on the first air outlet surface 122, and the first air outlet surface 122 is located on the outer side of the molding platform 21. The inner annular surface of the air outlet member is used as the first air outlet surface 122, and its relatively closed annular structure helps to stabilize the flow direction and speed of the airflow. Compared with the open air outlet design, it can reduce the turbulence and eddy current of the airflow, making the blown air more stable and continuous; the annular design of the first air outlet surface 122 located on the outer side of the molding platform 21 enables the air outlet to form an all-round uniform airflow around the molding platform 21, so as to achieve uniform cleaning of each position on the molding platform 21.

[0053] Optionally, the bottom surface of the air outlet member may be a second air outlet surface 123, the first air outlet 121 is disposed on the second air outlet surface 123, the second air outlet surface 123 is disposed above the molding platform 21, and the vertical projection of the second air outlet surface 123 is located at the edge of the molding platform 21. When the second air outlet surface 123 is located above the molding platform 21 and its vertical projection is located at the edge of the molding platform 21, the wind blown out from the first air outlet 121 can directly act on the dust on the molding platform 21. Since the second air outlet surface 123 is disposed on the bottom surface of the air outlet member, the wind can drive the dust from the center of the molding platform 21 to the edge, so that the dust can fall from the molding platform 21, which is convenient for subsequent collection. Compared with disordered blowing cleaning, this centralized cleaning method can remove dust from the molding platform 21 more efficiently.

[0054] Preferably, if Figure 2-Figure 4 As shown, in this embodiment, the air outlet member includes a first air outlet surface 122 and a second air outlet surface 123, so that the air outlet member can blow air in multiple directions. Blowing air in multiple directions can form a complex airflow path in the powder drop groove 11. Compared with the air outlet from a single air outlet surface, this method can remove dust from the device more quickly. Blowing air from a single air outlet surface may cause dust to be blown to a new position in the device and then deposited again, while the two air outlet surfaces can make the dust in a dynamic suspension state after being blown up, and then be sucked away or discharged from the device by blowing air in different directions.

[0055] Specifically, Figure 2-Figure 4 As shown, in this embodiment, an air supply cavity is provided in the air outlet member, and the air supply cavity is an annular cavity provided along the circumference of the air outlet member, and the air supply cavity is respectively connected with a plurality of first air outlets 121, and the dust recovery mechanism 1 also includes an air supply component, and the air supply component is connected with the air supply cavity, and the gas can be evenly distributed in the circumference after entering the air supply cavity, and then evenly blown out from a plurality of first air outlets 121 connected with the air supply cavity. The provision of the air supply cavity prevents the air outlet member from having a large air volume in some areas and a small air volume in other areas, and makes the air outlet effect of the air outlet member more stable and consistent, and can provide a uniform air flow for a larger area, thereby improving the comfort and effect of use.

[0056] It should be noted here that the air supply component is an existing structure, and setting an air supply component in the dust recovery mechanism 1 is a conventional setting in the field. In this embodiment, any air supply component in the prior art can be used, and it can be connected to the air supply chamber by any connection method in the prior art. As long as the gas can be delivered to the air supply chamber, it will not be introduced in detail.

[0057] Preferably, if Figure 2-Figure 4As shown, in this embodiment, the air supply chamber includes a first air supply chamber 124 and a second air supply chamber 125 which are arranged at intervals from top to bottom. The first air supply chamber 124 is connected to the first air outlet 121 arranged on the first air outlet surface 122, and the second air supply chamber 125 is connected to the first air outlet 121 arranged on the second air outlet surface 123. The first air supply chamber 124 and the second air supply chamber 125 are relatively independent. The first air supply chamber 124 and the second air supply chamber 125 are relatively independent and connected to the air outlets of different air outlet surfaces, which can form a more layered airflow inside the powder falling groove 11. The wind blown out from the first air outlet surface 122 above by the first air supply chamber 124 can press the dust floating at a higher position downward, and the wind blown out from the second air outlet surface 123 on the side by the second air supply chamber 125 can drive the dust on the side to the central area or a specific recovery direction. Compared with the design of a single air supply chamber, this layered and directional air supply method can cover the dust generation area more comprehensively and effectively improve the efficiency of dust recovery. In other embodiments, the air supply chamber may also be a first air supply chamber 124 and a second air supply chamber 125 that are connected, etc., as long as air can be supplied to the first air outlet 121 .

[0058] In some other embodiments, only one second air outlet is provided on the first air outlet surface 122 and / or the second air outlet surface 123, and the second air outlet extends around the circumference of the air outlet member. Since the second air outlet has no breakpoints, the annular air outlet member can achieve 360° continuous air outlet, so that dust in a larger range and more positions can be blown up. Since the second air outlet extends along the circumference of the air outlet member, there are no complicated situations such as dust accumulation and blockage that may occur between multiple dispersed air outlets. When the first air outlet 121 is maintained and cleaned after use, it is only necessary to simply clean and inspect the entire second air outlet, which reduces maintenance time and cost.

[0059] In this embodiment, the 3D printing raw materials include metal, plastic, polylactic acid and polycarbonate and other materials. When metal is used as the printing raw material, after printing, when cleaning the dust, when the gas blown toward the forming platform 21 is a gas that reacts with metal dust, there is a possibility that the dust on the forming platform 21 will be oxidized (dust explosion).

[0060] To solve the above problems, in this embodiment, the gas introduced into the air supply chamber is an inert gas. Using the inert gas to blow air to the molding platform 21 can effectively isolate oxygen, avoid metal oxidation, and improve the efficiency of powder cleaning. Metal dust has a high specific surface area and activity, and dust explosion may occur under certain conditions. The use of inert gas can reduce the oxygen content around the printing platform, thereby greatly reducing the risk of dust explosion and improving the safety of the powder cleaning process. At the same time, since the working environment during the metal 3D printing process is also an inert environment, before the inert gas is introduced into the air supply chamber, the powder drop groove 11 can also be placed in an inert environment, thereby avoiding the powder from contacting other gases and exploding. In this embodiment, the inert gas is introduced into the air supply chamber to ensure that the gas blown into the air supply chamber and the gas originally diffused in the environment will not react chemically, so as to stabilize the environment in the powder drop groove 11. In other examples, the gas introduced into the air supply chamber can be any gas, as long as the gas does not react with the dust to be cleaned. For example, the gas introduced into the air supply chamber can be nitrogen or carbon dioxide.

[0061] Specifically, Figure 1-Figure 2 As shown, in this embodiment, the dust recovery mechanism 1 also includes a dust collecting member 13, which is connected to the powder dropping trough 11 and is used to collect dust in the powder dropping trough 11. If the dust is not collected in time, it is easy to spread inside the device or in the surrounding environment. After the dust collecting member 13 is connected to the powder dropping trough 11, a negative pressure environment can be formed near the powder dropping trough 11. When dust falls into the powder dropping trough 11, the suction force generated by the dust collecting member 13 can quickly suck the dust into the collection system, rather than letting the dust have a chance to fly again.

[0062] It should be noted here that the dust collecting part 13 is an existing structure, and setting the dust collecting part 13 in the dust recovery mechanism 1 is a conventional setting in the field. In this embodiment, any dust collecting part 13 in the prior art can be adopted, and it can be connected with the powder dropping trough 11 by any connection method in the prior art. As long as the dust and gas can be adsorbed, it will not be introduced in detail.

[0063] Specifically, Figure 1-Figure 2As shown, in this embodiment, the dust recovery mechanism 1 includes a filter assembly 14, and the filter assembly 14 includes a collection shell, a filter element and an exhaust port. The collection shell is connected to the dust collecting element 13 and is used to store dust. The collection shell is provided with an exhaust port. The filter element is provided in the collection shell and is used to filter the dust gas sucked by the dust collecting element 13. The collection shell serves as a container for storing dust and can collect the filtered dust in a centralized manner. For some valuable printing material dust, the dust can be collected into the collection shell by the filter assembly 14, and the dust can be reprocessed and remade into usable printing materials to realize resource recycling. At the same time, the filter element in the filter assembly 14 can effectively intercept dust and only allow clean air to be discharged through the exhaust port, thereby protecting the respiratory health of the operator.

[0064] Specifically, Figure 1-Figure 2 As shown, in the present embodiment, the dust recovery mechanism 1 further includes a first quick-release assembly 15, and the powder dropping trough 11 and the dust collecting part 13 are sealedly connected via the first quick-release assembly 15. The powder dropping trough 11 and the dust collecting part 13 are sealedly connected via the first quick-release assembly 15. When the dust in the powder dropping trough 11 needs to be cleaned, the powder dropping trough 11 can be conveniently removed. This quick disassembly method can greatly shorten the cleaning time and reduce the equipment downtime.

[0065] Alternatively, if Figure 1-Figure 2 As shown, in this embodiment, the first quick-release assembly 15 can be a clamp, through which the powder dropping trough 11 and the dust collecting part 13 are sealed and connected. The clamp can be installed and disassembled by simply tightening or loosening the bolts, without the need for complex tools and cumbersome steps. The operator can quickly connect or disconnect the powder dropping trough 11 and the dust collecting part 13, which greatly improves work efficiency and reduces equipment downtime. When the clamp is correctly installed and tightened, it can provide a reliable seal to prevent gas leakage. In other embodiments, the first quick-release assembly 15 can also be a quick connector or a snap-on quick-release part, etc., as long as it can achieve quick connection and disconnection of the powder dropping trough 11 and the dust collecting part 13, no further elaboration will be given.

[0066] Specifically, Figure 1-Figure 2 As shown, in this embodiment, the dust recovery mechanism 1 also includes a second quick-release component 16, and the dust collecting part 13 and the filter component 14 are sealed and connected via the second quick-release component 16. The filter component 14 and the dust collecting part 13 are sealed and connected via the second quick-release component 16. When it is necessary to clean the dust in the filter component 14, the filter component 14 can be easily removed. This quick disassembly method can greatly shorten the cleaning time and reduce equipment downtime.

[0067] Alternatively, if Figure 1-Figure 2As shown, in this embodiment, the second quick-release component 16 can be a clamp, through which the filter component 14 and the dust collecting part 13 are sealed and connected. The clamp can be installed and disassembled by simply tightening or loosening the bolts, without the need for complex tools and cumbersome steps. The operator can quickly connect or disconnect the filter component 14 and the dust collecting part 13, which greatly improves work efficiency and reduces equipment downtime. When the clamp is correctly installed and tightened, it can provide a reliable seal to prevent gas leakage. In other embodiments, the second quick-release component 16 can also be a quick connector or a buckle-type quick-release part, etc., as long as it can achieve quick connection and disconnection of the filter component 14 and the dust collecting part 13, no further elaboration will be given.

[0068] Specifically, Figure 1 As shown, in this embodiment, the circumferential edge of the forming platform 21 is spaced apart from the inner wall of the powder dropping trough 11 to form a powder dropping gap, which provides a natural falling channel for the dust blown up by the air supply member 12 or blown to the forming platform 21 by the air supply member 12, so that the dust can smoothly fall into the powder dropping trough 11 through this powder dropping gap.

[0069] Specifically, Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the molding shell 22 includes a molding bin 221, a first isolating member 222 and a molding cylinder 223 connected from top to bottom, and the first isolating member 222 is movably connected to the molding bin 221, and the first isolating member 222 can cover the top opening of the molding cylinder 223. The molding platform 21 is located in the molding cylinder 223. The first isolating member 222 divides the molding shell 22 into a molding area surrounded by the molding bin 221 and a dust cleaning and collection area surrounded by the molding cylinder 223 and the powder dropping groove 11. Due to the separation of the first isolating member 222 The dust in the dust cleaning and collection area will not easily enter the molding area. There is a special dust cleaning and collection area, which makes the dust collection more concentrated and efficient. Compared with the equipment without such separation, this structure can better guide the flow direction of the dust, facilitate the unified treatment of the dust, and reduce the dust residue in other parts of the equipment. The dust cleaning and collection process are completed below the molding area and isolated from the molding area, so that the molding area will not be filled with dust due to dust cleaning and collection, thereby avoiding dust overflow and pollution to the external environment.

[0070] Optionally, in this embodiment, the first isolating member 222 is arranged at the bottom of the molding bin 221 and is rotatably connected to the bottom of the molding bin 221. The first isolating member 222 is also hingedly connected to the side wall of the molding bin 221. When it is necessary to lower the first isolating member 222 to block the molding cylinder 223, the hinge is removed from the side wall of the molding bin 221 and the first isolating member 222 is rotated to a position where the molding cylinder 223 can be blocked, thereby realizing the isolation of the molding area from the dust cleaning and collection area. When it is not necessary to isolate the molding area from the dust cleaning and collection area, the first isolating member 222 can be rotated to a position close to the side wall of the molding bin 221, and the hinge is connected to the side wall to avoid the first isolating member 222 from rotating during the printing process and interfering with the printing work. The first isolating member 222 can flexibly realize the isolation of the molding area from the dust cleaning and collection area according to the actual printing and cleaning requirements. In other embodiments, the first isolating member 222 can be any setting, as long as the first isolating member 222 can block or lift the molding cylinder 223 according to the requirements.

[0071] In some embodiments, the dust recovery mechanism 1 further includes a first seal 17, which is disposed between the air outlet and the powder drop groove 11 to prevent dust from leaking from the gap between the air outlet and the powder drop groove 11, and ensure that the blown gas can flow to the target area in a concentrated and directional manner, thereby ensuring the working efficiency of the dust recovery mechanism 1, and enabling the dust recovery mechanism 1 to more effectively blow away the dust on the molding platform 21. The first seal 17 also plays a certain role in sound insulation, reducing the outward propagation of noise generated by the air outlet when it is working, reducing the noise level when the equipment is running, and improving the working environment.

[0072] Optionally, the first sealing member 17 may be made of elastic materials such as rubber and soft glue. In this embodiment, the first sealing member 17 is made of rubber, and the rubber sealing member can quickly return to its original shape after being squeezed or stretched. This elasticity allows it to fit tightly on the sealing surface, fill tiny gaps and irregularities, and effectively prevent gas leakage.

[0073] In some embodiments, the 3D printing device further includes a second seal, which is disposed between the molding cylinder 223 and the powder dropping groove 11, and the second seal can effectively prevent dust from leaking out from the gap between the molding cylinder 223 and the powder dropping groove 11. The gap is sealed by the second seal, so that the dust is confined in the space surrounded by the powder dropping groove 11 and the molding cylinder 223, which is convenient for the internal cleaning mechanism to centrally clean the dust; the powder dropping groove 11 and the molding cylinder 223 after the second seal is provided can also better guide the airflow, so that the blown dust can be collected in a predetermined direction, thereby improving the efficiency of dust cleaning.

[0074] Optionally, the second sealing member may be made of rubber, soft glue or other elastic materials. In this embodiment, the second sealing member is made of rubber, and the rubber sealing member can quickly return to its original shape after being squeezed or stretched. This elasticity allows it to fit tightly to the sealing surface, fill tiny gaps and irregularities, and effectively prevent gas leakage.

[0075] In some embodiments, the 3D printing device also includes a third seal, which is sleeved on the circumference of the molding platform 21 and abuts against the wall of the molding cylinder 223. The third seal can effectively prevent dust from leaking from the gap between the molding platform 21 and the inner wall of the molding cylinder 223, so that the molding platform 21 and the molding cylinder 223 are in a relatively sealed state. At the same time, since the third seal can effectively prevent dust from leaking from the gap between the molding platform 21 and the inner wall of the molding cylinder 223, the dust will not fall to the outside of the 3D printing device, which can better protect the environment and the health of the operator.

[0076] Optionally, the third sealing member may be made of elastic materials such as rubber, soft glue or felt, and the specific material is not limited as long as the sealing between the molding platform 21 and the molding cylinder 223 can be achieved.

[0077] Preferably, if Figure 1-Figure 2 As shown, in this embodiment, the 3D printing device includes a first seal 17, a second seal and a third seal. By adding the first seal 17, the second seal and the third seal, the first seal 17 seals the powder drop groove 11 and the air outlet, the second seal seals the powder drop groove 11 and the molding cylinder 223, the third seal seals the molding cylinder 223 and the molding platform 21, and the first isolation member 222 separates the molding area from the dust cleaning and collection area, so that the dust cleaning and collection area becomes a sealed space. The dust cleaning and collection are all carried out in the dust cleaning and collection area, and the dust will not diffuse in the molding area, so that the molding area will not be filled with dust due to dust cleaning and dust collection, thereby avoiding dust spillage and pollution to the external environment.

[0078] When the dust cleaning and collection area becomes a closed space, the gas blown out from the air supply part 12 can be relatively completely sucked back by the dust collecting part 13 and filtered through the filter assembly 14, forming a recyclable gas loop and reducing the waste of gas resources. At the same time, metal dust may form a combustible dust cloud under certain conditions, which may explode when encountering factors such as fire sources or static electricity. The closed space can limit the entry of oxygen, so that the dust cleaning and collection area maintains an inert environment throughout the process, reducing the flammability of the dust cloud, and also preventing external fire sources, static electricity and other dangerous factors from entering the powder cleaning space, thereby greatly reducing the risk of explosion and ensuring the safety of equipment and personnel.

[0079] Preferably, if Figure 1-Figure 2 As shown, in this embodiment, the lifting unit 23 includes a lifting member 231 and a protective member 232. The protective member 232 is sleeved outside the lifting member 231 to protect the lifting member 231. During the operation of the equipment, the lifting member 231 may collide with surrounding objects due to vibration of the equipment or human misoperation. The protective member 232 is sleeved outside the lifting member 231, which can effectively buffer the impact force caused by the collision. The protective member 232 can prevent foreign matter such as dust and debris from entering the internal structure of the lifting member 231. The protective member 232 acts as a barrier, which can greatly reduce the occurrence of this situation, ensure the cleanliness of the inside of the lifting member 231, and extend its service life.

[0080] It should be noted here that the lifting member 231 is an existing structure, and a conventional setting of a lifting system is set in the dust recovery mechanism 1. In this embodiment, any connection method in the prior art can be used to connect with the forming platform 21. As long as the lifting member 231 drives the forming platform 21 to rise and fall, no further specific introduction is required.

[0081] Optionally, in this embodiment, the protective member 232 is made of a retractable flexible material, which can adapt to the retraction of the lifting member 231 by its own retraction; when the lifting member 231 performs a retractable movement, the protective member 232 can be retracted accordingly, and will not limit the normal travel of the lifting member 231. The flexible protective member 232 can be retracted and retracted with the movement of the lifting member 231, and will not cause interference, thereby ensuring the precise operation of the lifting platform. In other embodiments, the material of the protective member 232 can also be a hard plastic material, etc., as long as it can protect the lifting member 231.

[0082] This embodiment also provides a dust collection method, which is applied to the above 3D printing device. Specifically, the dust collection method includes the following steps:

[0083] S1. After the product is formed, the lifting unit 23 drives the forming platform 21 to descend into the powder dropping trough 11 below the forming shell 22;

[0084] S2, the air supply member 12 blows air toward the molding platform 21 to blow off the dust on the molding platform 21 and collect it in the powder dropping groove 11;

[0085] S3, after the dust is collected in the powder dropping trough 11, the lifting unit 23 drives the molding platform 21 to rise to a preset height for taking the molding platform 21 out of the molding shell 22;

[0086] S4, taking the molding platform 21 out of the molding shell 22.

[0087] The dust can be cleaned and collected by the above-mentioned dust collection method, and then the dust is collected and filtered by the dust collecting part 13 and the filter assembly 14, so as to realize the recovery of the dust on the forming platform 21. At the same time, since the dust is cleaned and collected at the bottom of the forming area, the dust is effectively avoided from spreading in the forming area, thereby protecting the external environment.

[0088] Specifically, Figure 1-Figure 2 As shown, in this embodiment, the first air inlet and the first air outlet are respectively connected to the opposite sides of the forming cylinder 223, so that the forming platform 21 can be cleaned and collected when it descends to the forming cylinder 223. The first air inlet and the first air outlet are respectively located on the opposite sides of the forming cylinder 223, which establishes an efficient ventilation path for dust cleaning. When the cleaning program is started, the airflow enters from the first air inlet, passes through the forming cylinder 223, and carries the dust on the forming platform 21 to the first air outlet for discharge. This directional airflow can quickly and effectively take away the dust.

[0089] It should be noted here that the first air inlet member and the first air outlet member are existing structures, and setting the first air inlet member and the first air outlet member in the dust recovery mechanism 1 is a conventional setting in this field. In this embodiment, any connection method in the prior art can be adopted to connect the first air inlet member and the first air outlet member with the forming cylinder 223 respectively. As long as the dust on the forming platform 21 can be cleaned and collected, it will not be introduced in detail.

[0090] This embodiment also provides a dust collection method, which is applied to the above 3D printing device. Specifically, the dust collection method includes the following steps:

[0091] S1. After the product is formed, the lifting unit 23 drives the forming platform 21 to descend to below the first air outlet member in the forming cylinder 223, and closes the first isolation member 222;

[0092] S2, the first air outlet blows air toward the forming platform 21, so that the dust on the forming platform 21 is collected through the first air inlet;

[0093] S3, after the dust is collected by the first air inlet member, the lifting unit 23 drives the molding platform 21 to rise to a preset height for taking the molding platform 21 out of the molding shell 22;

[0094] S4, taking the molding platform 21 out of the molding shell 22.

[0095] The dust collection method can be used to clean and collect dust and recycle dust on the molding platform 21. At the same time, since dust is cleaned and collected at the bottom of the molding area, dust is effectively prevented from spreading in the molding area, thereby protecting the external environment.

[0096] This embodiment also provides a dust collection method, which is applied to the above 3D printing device. Specifically, the dust collection method includes the following steps:

[0097] S1. After the product is formed, the lifting unit 23 drives the forming platform 21 to descend to below the first air outlet member in the forming cylinder 223, and closes the first isolation member 222;

[0098] S2, the first air outlet blows air toward the forming platform 21, so that the dust on the forming platform 21 is collected for the first time through the first air inlet;

[0099] S3, the lifting unit 23 drives the molding platform 21 to descend to the powder dropping trough 11 below the molding shell 22 again;

[0100] S4, the air supply member 12 blows air toward the molding platform 21 to blow off the dust on the molding platform 21 and collect it in the powder dropping trough 11;

[0101] S5, after the dust is collected in the powder dropping trough 11, the lifting unit 23 drives the molding platform 21 to rise to a preset height for taking the molding platform 21 out of the molding shell 22;

[0102] S6, taking the molding platform 21 out of the molding shell 22.

[0103] The dust can be cleaned and collected by the above-mentioned dust collection method, and then the dust is collected and filtered by the dust collecting part 13 and the filter assembly 14, so as to realize the recovery of the dust on the forming platform 21. At the same time, since the dust is cleaned and collected at the bottom of the forming area, the dust is effectively avoided from spreading in the forming area, thereby protecting the external environment.

[0104] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A dust recovery mechanism, used in a 3D printing device, the 3D printing device comprising a molding platform (21) and a molding shell (22), the molding platform (21) being capable of carrying a printed product, the molding platform (21) being liftably sealed and arranged in the molding shell (22), characterized in that: Dust recovery organizations include: A powder dropping groove (11) is sealed and connected to the bottom end of the molding shell (22), and the molding platform (11) can be lowered into the powder dropping groove (11); An air supply member (12), the air supply member (12) being arranged inside the powder dropping groove (11), and the air supply member (12) being used to supply air to the forming platform (21) so that dust falls into the powder dropping groove (11).

2. The dust recovery mechanism according to claim 1, characterized in that: The air supply member (12) is an annular air supply member, and the air supply member (12) is used to blow air toward the molding platform (21) along the circumference of the molding platform (21).

3. The dust recovery mechanism according to claim 2, characterized in that: The bottom surface of the air supply member (12) is a first air outlet surface (122), the first air outlet surface (122) is located above the molding platform (21), and the vertical projection of the first air outlet surface (122) is located at the edge of the molding platform (21); And / or, the inner annular surface of the annular air supply member (12) is a second air outlet surface (123), and the second air outlet surface (123) is located on the circumferential outer side of the forming platform (21).

4. The dust recovery mechanism according to any one of claims 1 to 3, characterized in that: The dust recovery mechanism further comprises a dust collecting member (13), wherein the dust collecting member (13) is connected to the powder falling groove (11) and is used for collecting the dust in the powder falling groove (11).

5. The dust recovery mechanism according to claim 4, characterized in that: The dust recovery mechanism further comprises a filter assembly (14), wherein the filter assembly (14) comprises: A collecting shell, connected to the dust collecting member (13), used for storing the dust, and an exhaust port is provided on the collecting shell; A filter element is arranged in the collection shell and is used to filter the dust gas sucked in by the dust collecting element (13).

6. The dust recovery mechanism according to claim 5, characterized in that: The dust recovery mechanism further comprises a first quick-release assembly (15), and the powder dropping groove (11) and the dust collecting member (13) are sealedly connected via the first quick-release assembly (15); And / or, the dust recovery mechanism further comprises a second quick-release assembly (16), and the dust collecting component (13) and the filter assembly (14) are sealedly connected via the second quick-release assembly (16).

7. The dust recovery mechanism according to any one of claims 1 to 3, characterized in that: The circumferential edge of the molding platform (21) is spaced apart from the inner wall of the powder dropping groove (11) to form a powder dropping gap.

8. A 3D printing device, characterized in that: It comprises a molding shell (22), a molding platform (21), a lifting unit (23) and a dust recovery mechanism as described in any one of claims 1 to 7, wherein the bottom end of the molding shell (22) is sealedly connected to the powder dropping groove (11), and the lifting unit (23) is used to drive the molding platform (21) to rise and fall.

9. The 3D printing device according to claim 8, characterized in that: The molding shell (22) comprises a molding bin (221), a first isolating member (222) and a molding cylinder (223) connected from top to bottom, and the first isolating member (222) is movably connected to the molding bin (221), the first isolating member (222) can cover the top opening of the molding cylinder (223), and the molding platform (21) is located in the molding cylinder (223); And / or, two opposite sides of the molded shell (22) are respectively connected to a first air inlet member and a first air outlet member.

10. A dust collection method, characterized in that: Using the 3D printing device according to any one of claims 8 to 9, the dust collection method comprises the following steps: S1. After the product is formed, the lifting unit (2) drives the forming platform (21) to descend into the powder dropping groove (11) below the forming shell (22); S2, the air supply member (12) blows air toward the molding platform (21) to blow off the dust on the molding platform (21) and collect it in the powder dropping groove (11); S3, after the dust is collected in the powder dropping groove (11), the lifting unit (23) drives the molding platform (21) to rise to a preset height for taking the molding platform (21) out of the molding shell (22); S4, taking the molding platform (21) out of the molding shell (22).

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